author | ek110237 |
Wed, 24 Oct 2007 16:54:46 -0700 | |
changeset 5326 | 6752aa2bd5bc |
parent 4863 | 7b14ad153d91 |
child 5331 | 3047ad28a67b |
permissions | -rw-r--r-- |
789 | 1 |
/* |
2 |
* CDDL HEADER START |
|
3 |
* |
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4 |
* The contents of this file are subject to the terms of the |
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* Common Development and Distribution License (the "License"). |
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* You may not use this file except in compliance with the License. |
789 | 7 |
* |
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
|
9 |
* or http://www.opensolaris.org/os/licensing. |
|
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* See the License for the specific language governing permissions |
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* and limitations under the License. |
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12 |
* |
|
13 |
* When distributing Covered Code, include this CDDL HEADER in each |
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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* If applicable, add the following below this CDDL HEADER, with the |
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* fields enclosed by brackets "[]" replaced with your own identifying |
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* information: Portions Copyright [yyyy] [name of copyright owner] |
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* |
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* CDDL HEADER END |
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20 |
*/ |
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21 |
/* |
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3461 | 22 |
* Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
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* Use is subject to license terms. |
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*/ |
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/* Portions Copyright 2007 Jeremy Teo */ |
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|
789 | 28 |
#pragma ident "%Z%%M% %I% %E% SMI" |
29 |
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30 |
#include <sys/types.h> |
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31 |
#include <sys/param.h> |
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32 |
#include <sys/time.h> |
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33 |
#include <sys/systm.h> |
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#include <sys/sysmacros.h> |
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#include <sys/resource.h> |
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#include <sys/vfs.h> |
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#include <sys/vfs_opreg.h> |
789 | 38 |
#include <sys/vnode.h> |
39 |
#include <sys/file.h> |
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40 |
#include <sys/stat.h> |
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#include <sys/kmem.h> |
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42 |
#include <sys/taskq.h> |
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43 |
#include <sys/uio.h> |
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#include <sys/vmsystm.h> |
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45 |
#include <sys/atomic.h> |
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#include <sys/vm.h> |
789 | 47 |
#include <vm/seg_vn.h> |
48 |
#include <vm/pvn.h> |
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49 |
#include <vm/as.h> |
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50 |
#include <sys/mman.h> |
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51 |
#include <sys/pathname.h> |
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52 |
#include <sys/cmn_err.h> |
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53 |
#include <sys/errno.h> |
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54 |
#include <sys/unistd.h> |
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55 |
#include <sys/zfs_vfsops.h> |
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56 |
#include <sys/zfs_dir.h> |
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57 |
#include <sys/zfs_acl.h> |
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58 |
#include <sys/zfs_ioctl.h> |
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59 |
#include <sys/fs/zfs.h> |
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60 |
#include <sys/dmu.h> |
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61 |
#include <sys/spa.h> |
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62 |
#include <sys/txg.h> |
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63 |
#include <sys/dbuf.h> |
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64 |
#include <sys/zap.h> |
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65 |
#include <sys/dirent.h> |
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66 |
#include <sys/policy.h> |
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67 |
#include <sys/sunddi.h> |
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68 |
#include <sys/filio.h> |
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69 |
#include "fs/fs_subr.h" |
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#include <sys/zfs_ctldir.h> |
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#include <sys/dnlc.h> |
1669 | 72 |
#include <sys/zfs_rlock.h> |
789 | 73 |
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74 |
/* |
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75 |
* Programming rules. |
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76 |
* |
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77 |
* Each vnode op performs some logical unit of work. To do this, the ZPL must |
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* properly lock its in-core state, create a DMU transaction, do the work, |
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79 |
* record this work in the intent log (ZIL), commit the DMU transaction, |
|
80 |
* and wait the the intent log to commit if it's is a synchronous operation. |
|
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* Morover, the vnode ops must work in both normal and log replay context. |
|
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* The ordering of events is important to avoid deadlocks and references |
|
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* to freed memory. The example below illustrates the following Big Rules: |
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* |
|
85 |
* (1) A check must be made in each zfs thread for a mounted file system. |
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* This is done avoiding races using ZFS_ENTER(zfsvfs) or |
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* ZFS_ENTER_VERIFY(zfsvfs, zp). A ZFS_EXIT(zfsvfs) is needed before |
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* all returns. |
789 | 89 |
* |
90 |
* (2) VN_RELE() should always be the last thing except for zil_commit() |
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* (if necessary) and ZFS_EXIT(). This is for 3 reasons: |
789 | 92 |
* First, if it's the last reference, the vnode/znode |
93 |
* can be freed, so the zp may point to freed memory. Second, the last |
|
94 |
* reference will call zfs_zinactive(), which may induce a lot of work -- |
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1669 | 95 |
* pushing cached pages (which acquires range locks) and syncing out |
789 | 96 |
* cached atime changes. Third, zfs_zinactive() may require a new tx, |
97 |
* which could deadlock the system if you were already holding one. |
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98 |
* |
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* (3) All range locks must be grabbed before calling dmu_tx_assign(), |
100 |
* as they can span dmu_tx_assign() calls. |
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101 |
* |
|
102 |
* (4) Always pass zfsvfs->z_assign as the second argument to dmu_tx_assign(). |
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789 | 103 |
* In normal operation, this will be TXG_NOWAIT. During ZIL replay, |
104 |
* it will be a specific txg. Either way, dmu_tx_assign() never blocks. |
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105 |
* This is critical because we don't want to block while holding locks. |
|
106 |
* Note, in particular, that if a lock is sometimes acquired before |
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* the tx assigns, and sometimes after (e.g. z_lock), then failing to |
|
108 |
* use a non-blocking assign can deadlock the system. The scenario: |
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109 |
* |
|
110 |
* Thread A has grabbed a lock before calling dmu_tx_assign(). |
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111 |
* Thread B is in an already-assigned tx, and blocks for this lock. |
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112 |
* Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() |
|
113 |
* forever, because the previous txg can't quiesce until B's tx commits. |
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114 |
* |
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115 |
* If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, |
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* then drop all locks, call dmu_tx_wait(), and try again. |
789 | 117 |
* |
1757 | 118 |
* (5) If the operation succeeded, generate the intent log entry for it |
789 | 119 |
* before dropping locks. This ensures that the ordering of events |
120 |
* in the intent log matches the order in which they actually occurred. |
|
121 |
* |
|
1757 | 122 |
* (6) At the end of each vnode op, the DMU tx must always commit, |
789 | 123 |
* regardless of whether there were any errors. |
124 |
* |
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* (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) |
789 | 126 |
* to ensure that synchronous semantics are provided when necessary. |
127 |
* |
|
128 |
* In general, this is how things should be ordered in each vnode op: |
|
129 |
* |
|
130 |
* ZFS_ENTER(zfsvfs); // exit if unmounted |
|
131 |
* top: |
|
132 |
* zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) |
|
133 |
* rw_enter(...); // grab any other locks you need |
|
134 |
* tx = dmu_tx_create(...); // get DMU tx |
|
135 |
* dmu_tx_hold_*(); // hold each object you might modify |
|
136 |
* error = dmu_tx_assign(tx, zfsvfs->z_assign); // try to assign |
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137 |
* if (error) { |
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138 |
* rw_exit(...); // drop locks |
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139 |
* zfs_dirent_unlock(dl); // unlock directory entry |
|
140 |
* VN_RELE(...); // release held vnodes |
|
141 |
* if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
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* dmu_tx_wait(tx); |
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143 |
* dmu_tx_abort(tx); |
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* goto top; |
145 |
* } |
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* dmu_tx_abort(tx); // abort DMU tx |
789 | 147 |
* ZFS_EXIT(zfsvfs); // finished in zfs |
148 |
* return (error); // really out of space |
|
149 |
* } |
|
150 |
* error = do_real_work(); // do whatever this VOP does |
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* if (error == 0) |
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* zfs_log_*(...); // on success, make ZIL entry |
789 | 153 |
* dmu_tx_commit(tx); // commit DMU tx -- error or not |
154 |
* rw_exit(...); // drop locks |
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155 |
* zfs_dirent_unlock(dl); // unlock directory entry |
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156 |
* VN_RELE(...); // release held vnodes |
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* zil_commit(zilog, seq, foid); // synchronous when necessary |
789 | 158 |
* ZFS_EXIT(zfsvfs); // finished in zfs |
159 |
* return (error); // done, report error |
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160 |
*/ |
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161 |
/* ARGSUSED */ |
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162 |
static int |
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163 |
zfs_open(vnode_t **vpp, int flag, cred_t *cr) |
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{ |
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znode_t *zp = VTOZ(*vpp); |
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/* Keep a count of the synchronous opens in the znode */ |
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if (flag & (FSYNC | FDSYNC)) |
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169 |
atomic_inc_32(&zp->z_sync_cnt); |
789 | 170 |
return (0); |
171 |
} |
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172 |
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173 |
/* ARGSUSED */ |
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174 |
static int |
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175 |
zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr) |
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{ |
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znode_t *zp = VTOZ(vp); |
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/* Decrement the synchronous opens in the znode */ |
4339 | 180 |
if ((flag & (FSYNC | FDSYNC)) && (count == 1)) |
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atomic_dec_32(&zp->z_sync_cnt); |
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789 | 183 |
/* |
184 |
* Clean up any locks held by this process on the vp. |
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185 |
*/ |
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186 |
cleanlocks(vp, ddi_get_pid(), 0); |
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187 |
cleanshares(vp, ddi_get_pid()); |
|
188 |
||
189 |
return (0); |
|
190 |
} |
|
191 |
||
192 |
/* |
|
193 |
* Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and |
|
194 |
* data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. |
|
195 |
*/ |
|
196 |
static int |
|
197 |
zfs_holey(vnode_t *vp, int cmd, offset_t *off) |
|
198 |
{ |
|
199 |
znode_t *zp = VTOZ(vp); |
|
200 |
uint64_t noff = (uint64_t)*off; /* new offset */ |
|
201 |
uint64_t file_sz; |
|
202 |
int error; |
|
203 |
boolean_t hole; |
|
204 |
||
205 |
file_sz = zp->z_phys->zp_size; |
|
206 |
if (noff >= file_sz) { |
|
207 |
return (ENXIO); |
|
208 |
} |
|
209 |
||
210 |
if (cmd == _FIO_SEEK_HOLE) |
|
211 |
hole = B_TRUE; |
|
212 |
else |
|
213 |
hole = B_FALSE; |
|
214 |
||
215 |
error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); |
|
216 |
||
217 |
/* end of file? */ |
|
218 |
if ((error == ESRCH) || (noff > file_sz)) { |
|
219 |
/* |
|
220 |
* Handle the virtual hole at the end of file. |
|
221 |
*/ |
|
222 |
if (hole) { |
|
223 |
*off = file_sz; |
|
224 |
return (0); |
|
225 |
} |
|
226 |
return (ENXIO); |
|
227 |
} |
|
228 |
||
229 |
if (noff < *off) |
|
230 |
return (error); |
|
231 |
*off = noff; |
|
232 |
return (error); |
|
233 |
} |
|
234 |
||
235 |
/* ARGSUSED */ |
|
236 |
static int |
|
237 |
zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, |
|
238 |
int *rvalp) |
|
239 |
{ |
|
240 |
offset_t off; |
|
241 |
int error; |
|
242 |
zfsvfs_t *zfsvfs; |
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znode_t *zp; |
789 | 244 |
|
245 |
switch (com) { |
|
4339 | 246 |
case _FIOFFS: |
789 | 247 |
return (zfs_sync(vp->v_vfsp, 0, cred)); |
248 |
||
1544 | 249 |
/* |
250 |
* The following two ioctls are used by bfu. Faking out, |
|
251 |
* necessary to avoid bfu errors. |
|
252 |
*/ |
|
4339 | 253 |
case _FIOGDIO: |
254 |
case _FIOSDIO: |
|
1544 | 255 |
return (0); |
256 |
||
4339 | 257 |
case _FIO_SEEK_DATA: |
258 |
case _FIO_SEEK_HOLE: |
|
789 | 259 |
if (ddi_copyin((void *)data, &off, sizeof (off), flag)) |
260 |
return (EFAULT); |
|
261 |
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zp = VTOZ(vp); |
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zfsvfs = zp->z_zfsvfs; |
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264 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 265 |
|
266 |
/* offset parameter is in/out */ |
|
267 |
error = zfs_holey(vp, com, &off); |
|
268 |
ZFS_EXIT(zfsvfs); |
|
269 |
if (error) |
|
270 |
return (error); |
|
271 |
if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) |
|
272 |
return (EFAULT); |
|
273 |
return (0); |
|
274 |
} |
|
275 |
return (ENOTTY); |
|
276 |
} |
|
277 |
||
278 |
/* |
|
279 |
* When a file is memory mapped, we must keep the IO data synchronized |
|
280 |
* between the DMU cache and the memory mapped pages. What this means: |
|
281 |
* |
|
282 |
* On Write: If we find a memory mapped page, we write to *both* |
|
283 |
* the page and the dmu buffer. |
|
284 |
* |
|
285 |
* NOTE: We will always "break up" the IO into PAGESIZE uiomoves when |
|
286 |
* the file is memory mapped. |
|
287 |
*/ |
|
288 |
static int |
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289 |
mappedwrite(vnode_t *vp, int nbytes, uio_t *uio, dmu_tx_t *tx) |
789 | 290 |
{ |
291 |
znode_t *zp = VTOZ(vp); |
|
292 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
293 |
int64_t start, off; |
|
294 |
int len = nbytes; |
|
295 |
int error = 0; |
|
296 |
||
297 |
start = uio->uio_loffset; |
|
298 |
off = start & PAGEOFFSET; |
|
299 |
for (start &= PAGEMASK; len > 0; start += PAGESIZE) { |
|
300 |
page_t *pp; |
|
301 |
uint64_t bytes = MIN(PAGESIZE - off, len); |
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uint64_t woff = uio->uio_loffset; |
789 | 303 |
|
304 |
/* |
|
305 |
* We don't want a new page to "appear" in the middle of |
|
306 |
* the file update (because it may not get the write |
|
307 |
* update data), so we grab a lock to block |
|
308 |
* zfs_getpage(). |
|
309 |
*/ |
|
310 |
rw_enter(&zp->z_map_lock, RW_WRITER); |
|
311 |
if (pp = page_lookup(vp, start, SE_SHARED)) { |
|
312 |
caddr_t va; |
|
313 |
||
314 |
rw_exit(&zp->z_map_lock); |
|
315 |
va = ppmapin(pp, PROT_READ | PROT_WRITE, (caddr_t)-1L); |
|
316 |
error = uiomove(va+off, bytes, UIO_WRITE, uio); |
|
317 |
if (error == 0) { |
|
318 |
dmu_write(zfsvfs->z_os, zp->z_id, |
|
319 |
woff, bytes, va+off, tx); |
|
320 |
} |
|
321 |
ppmapout(va); |
|
322 |
page_unlock(pp); |
|
323 |
} else { |
|
324 |
error = dmu_write_uio(zfsvfs->z_os, zp->z_id, |
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6496357 spec_fsync() is useless on devices that do write caching
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diff
changeset
|
325 |
uio, bytes, tx); |
789 | 326 |
rw_exit(&zp->z_map_lock); |
327 |
} |
|
328 |
len -= bytes; |
|
329 |
off = 0; |
|
330 |
if (error) |
|
331 |
break; |
|
332 |
} |
|
333 |
return (error); |
|
334 |
} |
|
335 |
||
336 |
/* |
|
337 |
* When a file is memory mapped, we must keep the IO data synchronized |
|
338 |
* between the DMU cache and the memory mapped pages. What this means: |
|
339 |
* |
|
340 |
* On Read: We "read" preferentially from memory mapped pages, |
|
341 |
* else we default from the dmu buffer. |
|
342 |
* |
|
343 |
* NOTE: We will always "break up" the IO into PAGESIZE uiomoves when |
|
344 |
* the file is memory mapped. |
|
345 |
*/ |
|
346 |
static int |
|
3638
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6496357 spec_fsync() is useless on devices that do write caching
billm
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diff
changeset
|
347 |
mappedread(vnode_t *vp, int nbytes, uio_t *uio) |
789 | 348 |
{ |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
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parents:
3461
diff
changeset
|
349 |
znode_t *zp = VTOZ(vp); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
350 |
objset_t *os = zp->z_zfsvfs->z_os; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
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3461
diff
changeset
|
351 |
int64_t start, off; |
789 | 352 |
int len = nbytes; |
353 |
int error = 0; |
|
354 |
||
355 |
start = uio->uio_loffset; |
|
356 |
off = start & PAGEOFFSET; |
|
357 |
for (start &= PAGEMASK; len > 0; start += PAGESIZE) { |
|
358 |
page_t *pp; |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
359 |
uint64_t bytes = MIN(PAGESIZE - off, len); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
360 |
|
789 | 361 |
if (pp = page_lookup(vp, start, SE_SHARED)) { |
362 |
caddr_t va; |
|
363 |
||
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
364 |
va = ppmapin(pp, PROT_READ, (caddr_t)-1L); |
789 | 365 |
error = uiomove(va + off, bytes, UIO_READ, uio); |
366 |
ppmapout(va); |
|
367 |
page_unlock(pp); |
|
368 |
} else { |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
369 |
error = dmu_read_uio(os, zp->z_id, uio, bytes); |
789 | 370 |
} |
371 |
len -= bytes; |
|
372 |
off = 0; |
|
373 |
if (error) |
|
374 |
break; |
|
375 |
} |
|
376 |
return (error); |
|
377 |
} |
|
378 |
||
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
379 |
offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ |
789 | 380 |
|
381 |
/* |
|
382 |
* Read bytes from specified file into supplied buffer. |
|
383 |
* |
|
384 |
* IN: vp - vnode of file to be read from. |
|
385 |
* uio - structure supplying read location, range info, |
|
386 |
* and return buffer. |
|
387 |
* ioflag - SYNC flags; used to provide FRSYNC semantics. |
|
388 |
* cr - credentials of caller. |
|
389 |
* |
|
390 |
* OUT: uio - updated offset and range, buffer filled. |
|
391 |
* |
|
392 |
* RETURN: 0 if success |
|
393 |
* error code if failure |
|
394 |
* |
|
395 |
* Side Effects: |
|
396 |
* vp - atime updated if byte count > 0 |
|
397 |
*/ |
|
398 |
/* ARGSUSED */ |
|
399 |
static int |
|
400 |
zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) |
|
401 |
{ |
|
402 |
znode_t *zp = VTOZ(vp); |
|
403 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
404 |
objset_t *os; |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
405 |
ssize_t n, nbytes; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
406 |
int error; |
1669 | 407 |
rl_t *rl; |
789 | 408 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
409 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
410 |
os = zfsvfs->z_os; |
789 | 411 |
|
412 |
/* |
|
413 |
* Validate file offset |
|
414 |
*/ |
|
415 |
if (uio->uio_loffset < (offset_t)0) { |
|
416 |
ZFS_EXIT(zfsvfs); |
|
417 |
return (EINVAL); |
|
418 |
} |
|
419 |
||
420 |
/* |
|
421 |
* Fasttrack empty reads |
|
422 |
*/ |
|
423 |
if (uio->uio_resid == 0) { |
|
424 |
ZFS_EXIT(zfsvfs); |
|
425 |
return (0); |
|
426 |
} |
|
427 |
||
428 |
/* |
|
1669 | 429 |
* Check for mandatory locks |
789 | 430 |
*/ |
431 |
if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { |
|
432 |
if (error = chklock(vp, FREAD, |
|
433 |
uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { |
|
434 |
ZFS_EXIT(zfsvfs); |
|
435 |
return (error); |
|
436 |
} |
|
437 |
} |
|
438 |
||
439 |
/* |
|
440 |
* If we're in FRSYNC mode, sync out this znode before reading it. |
|
441 |
*/ |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
442 |
if (ioflag & FRSYNC) |
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
443 |
zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); |
789 | 444 |
|
445 |
/* |
|
1669 | 446 |
* Lock the range against changes. |
789 | 447 |
*/ |
1669 | 448 |
rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); |
449 |
||
789 | 450 |
/* |
451 |
* If we are reading past end-of-file we can skip |
|
452 |
* to the end; but we might still need to set atime. |
|
453 |
*/ |
|
454 |
if (uio->uio_loffset >= zp->z_phys->zp_size) { |
|
455 |
error = 0; |
|
456 |
goto out; |
|
457 |
} |
|
458 |
||
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
459 |
ASSERT(uio->uio_loffset < zp->z_phys->zp_size); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
460 |
n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
461 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
462 |
while (n > 0) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
463 |
nbytes = MIN(n, zfs_read_chunk_size - |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
464 |
P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
465 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
466 |
if (vn_has_cached_data(vp)) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
467 |
error = mappedread(vp, nbytes, uio); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
468 |
else |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
469 |
error = dmu_read_uio(os, zp->z_id, uio, nbytes); |
1544 | 470 |
if (error) |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
471 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
472 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
473 |
n -= nbytes; |
789 | 474 |
} |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
475 |
|
789 | 476 |
out: |
2237 | 477 |
zfs_range_unlock(rl); |
789 | 478 |
|
479 |
ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
|
480 |
ZFS_EXIT(zfsvfs); |
|
481 |
return (error); |
|
482 |
} |
|
483 |
||
484 |
/* |
|
485 |
* Fault in the pages of the first n bytes specified by the uio structure. |
|
486 |
* 1 byte in each page is touched and the uio struct is unmodified. |
|
487 |
* Any error will exit this routine as this is only a best |
|
488 |
* attempt to get the pages resident. This is a copy of ufs_trans_touch(). |
|
489 |
*/ |
|
490 |
static void |
|
491 |
zfs_prefault_write(ssize_t n, struct uio *uio) |
|
492 |
{ |
|
493 |
struct iovec *iov; |
|
494 |
ulong_t cnt, incr; |
|
495 |
caddr_t p; |
|
496 |
uint8_t tmp; |
|
497 |
||
498 |
iov = uio->uio_iov; |
|
499 |
||
500 |
while (n) { |
|
501 |
cnt = MIN(iov->iov_len, n); |
|
502 |
if (cnt == 0) { |
|
503 |
/* empty iov entry */ |
|
504 |
iov++; |
|
505 |
continue; |
|
506 |
} |
|
507 |
n -= cnt; |
|
508 |
/* |
|
509 |
* touch each page in this segment. |
|
510 |
*/ |
|
511 |
p = iov->iov_base; |
|
512 |
while (cnt) { |
|
513 |
switch (uio->uio_segflg) { |
|
514 |
case UIO_USERSPACE: |
|
515 |
case UIO_USERISPACE: |
|
516 |
if (fuword8(p, &tmp)) |
|
517 |
return; |
|
518 |
break; |
|
519 |
case UIO_SYSSPACE: |
|
520 |
if (kcopy(p, &tmp, 1)) |
|
521 |
return; |
|
522 |
break; |
|
523 |
} |
|
524 |
incr = MIN(cnt, PAGESIZE); |
|
525 |
p += incr; |
|
526 |
cnt -= incr; |
|
527 |
} |
|
528 |
/* |
|
529 |
* touch the last byte in case it straddles a page. |
|
530 |
*/ |
|
531 |
p--; |
|
532 |
switch (uio->uio_segflg) { |
|
533 |
case UIO_USERSPACE: |
|
534 |
case UIO_USERISPACE: |
|
535 |
if (fuword8(p, &tmp)) |
|
536 |
return; |
|
537 |
break; |
|
538 |
case UIO_SYSSPACE: |
|
539 |
if (kcopy(p, &tmp, 1)) |
|
540 |
return; |
|
541 |
break; |
|
542 |
} |
|
543 |
iov++; |
|
544 |
} |
|
545 |
} |
|
546 |
||
547 |
/* |
|
548 |
* Write the bytes to a file. |
|
549 |
* |
|
550 |
* IN: vp - vnode of file to be written to. |
|
551 |
* uio - structure supplying write location, range info, |
|
552 |
* and data buffer. |
|
553 |
* ioflag - FAPPEND flag set if in append mode. |
|
554 |
* cr - credentials of caller. |
|
555 |
* |
|
556 |
* OUT: uio - updated offset and range. |
|
557 |
* |
|
558 |
* RETURN: 0 if success |
|
559 |
* error code if failure |
|
560 |
* |
|
561 |
* Timestamps: |
|
562 |
* vp - ctime|mtime updated if byte count > 0 |
|
563 |
*/ |
|
564 |
/* ARGSUSED */ |
|
565 |
static int |
|
566 |
zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) |
|
567 |
{ |
|
568 |
znode_t *zp = VTOZ(vp); |
|
569 |
rlim64_t limit = uio->uio_llimit; |
|
570 |
ssize_t start_resid = uio->uio_resid; |
|
571 |
ssize_t tx_bytes; |
|
572 |
uint64_t end_size; |
|
573 |
dmu_tx_t *tx; |
|
574 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
575 |
zilog_t *zilog; |
789 | 576 |
offset_t woff; |
577 |
ssize_t n, nbytes; |
|
1669 | 578 |
rl_t *rl; |
789 | 579 |
int max_blksz = zfsvfs->z_max_blksz; |
1669 | 580 |
int error; |
789 | 581 |
|
582 |
/* |
|
583 |
* Fasttrack empty write |
|
584 |
*/ |
|
1669 | 585 |
n = start_resid; |
789 | 586 |
if (n == 0) |
587 |
return (0); |
|
588 |
||
1669 | 589 |
if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) |
590 |
limit = MAXOFFSET_T; |
|
591 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
592 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
593 |
zilog = zfsvfs->z_log; |
789 | 594 |
|
595 |
/* |
|
2237 | 596 |
* Pre-fault the pages to ensure slow (eg NFS) pages |
1669 | 597 |
* don't hold up txg. |
789 | 598 |
*/ |
2237 | 599 |
zfs_prefault_write(n, uio); |
789 | 600 |
|
601 |
/* |
|
602 |
* If in append mode, set the io offset pointer to eof. |
|
603 |
*/ |
|
1669 | 604 |
if (ioflag & FAPPEND) { |
605 |
/* |
|
606 |
* Range lock for a file append: |
|
607 |
* The value for the start of range will be determined by |
|
608 |
* zfs_range_lock() (to guarantee append semantics). |
|
609 |
* If this write will cause the block size to increase, |
|
610 |
* zfs_range_lock() will lock the entire file, so we must |
|
611 |
* later reduce the range after we grow the block size. |
|
612 |
*/ |
|
613 |
rl = zfs_range_lock(zp, 0, n, RL_APPEND); |
|
614 |
if (rl->r_len == UINT64_MAX) { |
|
615 |
/* overlocked, zp_size can't change */ |
|
616 |
woff = uio->uio_loffset = zp->z_phys->zp_size; |
|
617 |
} else { |
|
618 |
woff = uio->uio_loffset = rl->r_off; |
|
619 |
} |
|
789 | 620 |
} else { |
621 |
woff = uio->uio_loffset; |
|
622 |
/* |
|
623 |
* Validate file offset |
|
624 |
*/ |
|
625 |
if (woff < 0) { |
|
626 |
ZFS_EXIT(zfsvfs); |
|
627 |
return (EINVAL); |
|
628 |
} |
|
629 |
||
630 |
/* |
|
1669 | 631 |
* If we need to grow the block size then zfs_range_lock() |
632 |
* will lock a wider range than we request here. |
|
633 |
* Later after growing the block size we reduce the range. |
|
789 | 634 |
*/ |
1669 | 635 |
rl = zfs_range_lock(zp, woff, n, RL_WRITER); |
789 | 636 |
} |
637 |
||
638 |
if (woff >= limit) { |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
639 |
zfs_range_unlock(rl); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
640 |
ZFS_EXIT(zfsvfs); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
641 |
return (EFBIG); |
789 | 642 |
} |
643 |
||
644 |
if ((woff + n) > limit || woff > (limit - n)) |
|
645 |
n = limit - woff; |
|
646 |
||
647 |
/* |
|
1669 | 648 |
* Check for mandatory locks |
789 | 649 |
*/ |
650 |
if (MANDMODE((mode_t)zp->z_phys->zp_mode) && |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
651 |
(error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
652 |
zfs_range_unlock(rl); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
653 |
ZFS_EXIT(zfsvfs); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
654 |
return (error); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
655 |
} |
1669 | 656 |
end_size = MAX(zp->z_phys->zp_size, woff + n); |
789 | 657 |
|
1669 | 658 |
/* |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
659 |
* Write the file in reasonable size chunks. Each chunk is written |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
660 |
* in a separate transaction; this keeps the intent log records small |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
661 |
* and allows us to do more fine-grained space accounting. |
789 | 662 |
*/ |
663 |
while (n > 0) { |
|
664 |
/* |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
665 |
* Start a transaction. |
789 | 666 |
*/ |
667 |
woff = uio->uio_loffset; |
|
668 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
669 |
dmu_tx_hold_bonus(tx, zp->z_id); |
|
670 |
dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); |
|
671 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
|
672 |
if (error) { |
|
673 |
if (error == ERESTART && |
|
674 |
zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
675 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
676 |
dmu_tx_abort(tx); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
677 |
continue; |
789 | 678 |
} |
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
679 |
dmu_tx_abort(tx); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
680 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
681 |
} |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
682 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
683 |
/* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
684 |
* If zfs_range_lock() over-locked we grow the blocksize |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
685 |
* and then reduce the lock range. This will only happen |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
686 |
* on the first iteration since zfs_range_reduce() will |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
687 |
* shrink down r_len to the appropriate size. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
688 |
*/ |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
689 |
if (rl->r_len == UINT64_MAX) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
690 |
uint64_t new_blksz; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
691 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
692 |
if (zp->z_blksz > max_blksz) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
693 |
ASSERT(!ISP2(zp->z_blksz)); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
694 |
new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
695 |
} else { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
696 |
new_blksz = MIN(end_size, max_blksz); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
697 |
} |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
698 |
zfs_grow_blocksize(zp, new_blksz, tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
699 |
zfs_range_reduce(rl, woff, n); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
700 |
} |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
701 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
702 |
/* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
703 |
* XXX - should we really limit each write to z_max_blksz? |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
704 |
* Perhaps we should use SPA_MAXBLOCKSIZE chunks? |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
705 |
*/ |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
706 |
nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
707 |
rw_enter(&zp->z_map_lock, RW_READER); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
708 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
709 |
tx_bytes = uio->uio_resid; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
710 |
if (vn_has_cached_data(vp)) { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
711 |
rw_exit(&zp->z_map_lock); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
712 |
error = mappedwrite(vp, nbytes, uio, tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
713 |
} else { |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
714 |
error = dmu_write_uio(zfsvfs->z_os, zp->z_id, |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
715 |
uio, nbytes, tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
716 |
rw_exit(&zp->z_map_lock); |
789 | 717 |
} |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
718 |
tx_bytes -= uio->uio_resid; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
719 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
720 |
/* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
721 |
* If we made no progress, we're done. If we made even |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
722 |
* partial progress, update the znode and ZIL accordingly. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
723 |
*/ |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
724 |
if (tx_bytes == 0) { |
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
725 |
dmu_tx_commit(tx); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
726 |
ASSERT(error != 0); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
727 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
728 |
} |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
729 |
|
789 | 730 |
/* |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
731 |
* Clear Set-UID/Set-GID bits on successful write if not |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
732 |
* privileged and at least one of the excute bits is set. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
733 |
* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
734 |
* It would be nice to to this after all writes have |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
735 |
* been done, but that would still expose the ISUID/ISGID |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
736 |
* to another app after the partial write is committed. |
789 | 737 |
*/ |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
738 |
mutex_enter(&zp->z_acl_lock); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
739 |
if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
740 |
(S_IXUSR >> 6))) != 0 && |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
741 |
(zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
742 |
secpolicy_vnode_setid_retain(cr, |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
743 |
(zp->z_phys->zp_mode & S_ISUID) != 0 && |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
744 |
zp->z_phys->zp_uid == 0) != 0) { |
4339 | 745 |
zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
746 |
} |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
747 |
mutex_exit(&zp->z_acl_lock); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
748 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
749 |
/* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
750 |
* Update time stamp. NOTE: This marks the bonus buffer as |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
751 |
* dirty, so we don't have to do it again for zp_size. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
752 |
*/ |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
753 |
zfs_time_stamper(zp, CONTENT_MODIFIED, tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
754 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
755 |
/* |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
756 |
* Update the file size (zp_size) if it has changed; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
757 |
* account for possible concurrent updates. |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
758 |
*/ |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
759 |
while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) |
789 | 760 |
(void) atomic_cas_64(&zp->z_phys->zp_size, end_size, |
761 |
uio->uio_loffset); |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
762 |
zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
763 |
dmu_tx_commit(tx); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
764 |
|
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
765 |
if (error != 0) |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
766 |
break; |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
767 |
ASSERT(tx_bytes == nbytes); |
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
768 |
n -= nbytes; |
789 | 769 |
} |
770 |
||
2237 | 771 |
zfs_range_unlock(rl); |
789 | 772 |
|
773 |
/* |
|
774 |
* If we're in replay mode, or we made no progress, return error. |
|
775 |
* Otherwise, it's at least a partial write, so it's successful. |
|
776 |
*/ |
|
777 |
if (zfsvfs->z_assign >= TXG_INITIAL || uio->uio_resid == start_resid) { |
|
778 |
ZFS_EXIT(zfsvfs); |
|
779 |
return (error); |
|
780 |
} |
|
781 |
||
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
782 |
if (ioflag & (FSYNC | FDSYNC)) |
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
783 |
zil_commit(zilog, zp->z_last_itx, zp->z_id); |
789 | 784 |
|
785 |
ZFS_EXIT(zfsvfs); |
|
786 |
return (0); |
|
787 |
} |
|
788 |
||
2237 | 789 |
void |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
790 |
zfs_get_done(dmu_buf_t *db, void *vzgd) |
2237 | 791 |
{ |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
792 |
zgd_t *zgd = (zgd_t *)vzgd; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
793 |
rl_t *rl = zgd->zgd_rl; |
2237 | 794 |
vnode_t *vp = ZTOV(rl->r_zp); |
795 |
||
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
796 |
dmu_buf_rele(db, vzgd); |
2237 | 797 |
zfs_range_unlock(rl); |
798 |
VN_RELE(vp); |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
799 |
zil_add_vdev(zgd->zgd_zilog, DVA_GET_VDEV(BP_IDENTITY(zgd->zgd_bp))); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
800 |
kmem_free(zgd, sizeof (zgd_t)); |
2237 | 801 |
} |
802 |
||
789 | 803 |
/* |
804 |
* Get data to generate a TX_WRITE intent log record. |
|
805 |
*/ |
|
806 |
int |
|
2237 | 807 |
zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) |
789 | 808 |
{ |
809 |
zfsvfs_t *zfsvfs = arg; |
|
810 |
objset_t *os = zfsvfs->z_os; |
|
811 |
znode_t *zp; |
|
812 |
uint64_t off = lr->lr_offset; |
|
2237 | 813 |
dmu_buf_t *db; |
1669 | 814 |
rl_t *rl; |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
815 |
zgd_t *zgd; |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
816 |
int dlen = lr->lr_length; /* length of user data */ |
789 | 817 |
int error = 0; |
818 |
||
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
819 |
ASSERT(zio); |
789 | 820 |
ASSERT(dlen != 0); |
821 |
||
822 |
/* |
|
1669 | 823 |
* Nothing to do if the file has been removed |
789 | 824 |
*/ |
825 |
if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) |
|
826 |
return (ENOENT); |
|
3461 | 827 |
if (zp->z_unlinked) { |
789 | 828 |
VN_RELE(ZTOV(zp)); |
829 |
return (ENOENT); |
|
830 |
} |
|
831 |
||
832 |
/* |
|
833 |
* Write records come in two flavors: immediate and indirect. |
|
834 |
* For small writes it's cheaper to store the data with the |
|
835 |
* log record (immediate); for large writes it's cheaper to |
|
836 |
* sync the data and get a pointer to it (indirect) so that |
|
837 |
* we don't have to write the data twice. |
|
838 |
*/ |
|
1669 | 839 |
if (buf != NULL) { /* immediate write */ |
840 |
rl = zfs_range_lock(zp, off, dlen, RL_READER); |
|
841 |
/* test for truncation needs to be done while range locked */ |
|
842 |
if (off >= zp->z_phys->zp_size) { |
|
843 |
error = ENOENT; |
|
844 |
goto out; |
|
845 |
} |
|
2449
6adc99f24a96
6452420 zfs_get_data() of page data panics when blocksize is less than pagesize
maybee
parents:
2391
diff
changeset
|
846 |
VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf)); |
1669 | 847 |
} else { /* indirect write */ |
848 |
uint64_t boff; /* block starting offset */ |
|
849 |
||
789 | 850 |
/* |
1669 | 851 |
* Have to lock the whole block to ensure when it's |
852 |
* written out and it's checksum is being calculated |
|
853 |
* that no one can change the data. We need to re-check |
|
854 |
* blocksize after we get the lock in case it's changed! |
|
789 | 855 |
*/ |
1669 | 856 |
for (;;) { |
1941
1843b345392c
6422565 Data corruption possible with range lock for dmu_sync()
perrin
parents:
1878
diff
changeset
|
857 |
if (ISP2(zp->z_blksz)) { |
1843b345392c
6422565 Data corruption possible with range lock for dmu_sync()
perrin
parents:
1878
diff
changeset
|
858 |
boff = P2ALIGN_TYPED(off, zp->z_blksz, |
1843b345392c
6422565 Data corruption possible with range lock for dmu_sync()
perrin
parents:
1878
diff
changeset
|
859 |
uint64_t); |
1843b345392c
6422565 Data corruption possible with range lock for dmu_sync()
perrin
parents:
1878
diff
changeset
|
860 |
} else { |
1843b345392c
6422565 Data corruption possible with range lock for dmu_sync()
perrin
parents:
1878
diff
changeset
|
861 |
boff = 0; |
1843b345392c
6422565 Data corruption possible with range lock for dmu_sync()
perrin
parents:
1878
diff
changeset
|
862 |
} |
1669 | 863 |
dlen = zp->z_blksz; |
864 |
rl = zfs_range_lock(zp, boff, dlen, RL_READER); |
|
865 |
if (zp->z_blksz == dlen) |
|
866 |
break; |
|
2237 | 867 |
zfs_range_unlock(rl); |
1669 | 868 |
} |
869 |
/* test for truncation needs to be done while range locked */ |
|
870 |
if (off >= zp->z_phys->zp_size) { |
|
871 |
error = ENOENT; |
|
872 |
goto out; |
|
873 |
} |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
874 |
zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
875 |
zgd->zgd_rl = rl; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
876 |
zgd->zgd_zilog = zfsvfs->z_log; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
877 |
zgd->zgd_bp = &lr->lr_blkptr; |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
878 |
VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); |
2237 | 879 |
ASSERT(boff == db->db_offset); |
880 |
lr->lr_blkoff = off - boff; |
|
881 |
error = dmu_sync(zio, db, &lr->lr_blkptr, |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
882 |
lr->lr_common.lrc_txg, zfs_get_done, zgd); |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
883 |
ASSERT((error && error != EINPROGRESS) || |
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
884 |
lr->lr_length <= zp->z_blksz); |
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
885 |
if (error == 0) { |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
886 |
zil_add_vdev(zfsvfs->z_log, |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
887 |
DVA_GET_VDEV(BP_IDENTITY(&lr->lr_blkptr))); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
888 |
} |
2237 | 889 |
/* |
890 |
* If we get EINPROGRESS, then we need to wait for a |
|
891 |
* write IO initiated by dmu_sync() to complete before |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
892 |
* we can release this dbuf. We will finish everything |
2237 | 893 |
* up in the zfs_get_done() callback. |
894 |
*/ |
|
895 |
if (error == EINPROGRESS) |
|
896 |
return (0); |
|
3063
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
897 |
dmu_buf_rele(db, zgd); |
b252896b372b
6341569 zio_alloc_blk() vdev distribution performs badly
perrin
parents:
2796
diff
changeset
|
898 |
kmem_free(zgd, sizeof (zgd_t)); |
789 | 899 |
} |
1669 | 900 |
out: |
2237 | 901 |
zfs_range_unlock(rl); |
789 | 902 |
VN_RELE(ZTOV(zp)); |
903 |
return (error); |
|
904 |
} |
|
905 |
||
906 |
/*ARGSUSED*/ |
|
907 |
static int |
|
908 |
zfs_access(vnode_t *vp, int mode, int flags, cred_t *cr) |
|
909 |
{ |
|
910 |
znode_t *zp = VTOZ(vp); |
|
911 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
912 |
int error; |
|
913 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
914 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 915 |
error = zfs_zaccess_rwx(zp, mode, cr); |
916 |
ZFS_EXIT(zfsvfs); |
|
917 |
return (error); |
|
918 |
} |
|
919 |
||
920 |
/* |
|
921 |
* Lookup an entry in a directory, or an extended attribute directory. |
|
922 |
* If it exists, return a held vnode reference for it. |
|
923 |
* |
|
924 |
* IN: dvp - vnode of directory to search. |
|
925 |
* nm - name of entry to lookup. |
|
926 |
* pnp - full pathname to lookup [UNUSED]. |
|
927 |
* flags - LOOKUP_XATTR set if looking for an attribute. |
|
928 |
* rdir - root directory vnode [UNUSED]. |
|
929 |
* cr - credentials of caller. |
|
930 |
* |
|
931 |
* OUT: vpp - vnode of located entry, NULL if not found. |
|
932 |
* |
|
933 |
* RETURN: 0 if success |
|
934 |
* error code if failure |
|
935 |
* |
|
936 |
* Timestamps: |
|
937 |
* NA |
|
938 |
*/ |
|
939 |
/* ARGSUSED */ |
|
940 |
static int |
|
941 |
zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, |
|
942 |
int flags, vnode_t *rdir, cred_t *cr) |
|
943 |
{ |
|
944 |
||
945 |
znode_t *zdp = VTOZ(dvp); |
|
946 |
zfsvfs_t *zfsvfs = zdp->z_zfsvfs; |
|
947 |
int error; |
|
948 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
949 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zdp); |
789 | 950 |
|
951 |
*vpp = NULL; |
|
952 |
||
953 |
if (flags & LOOKUP_XATTR) { |
|
954 |
/* |
|
3234 | 955 |
* If the xattr property is off, refuse the lookup request. |
956 |
*/ |
|
957 |
if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { |
|
958 |
ZFS_EXIT(zfsvfs); |
|
959 |
return (EINVAL); |
|
960 |
} |
|
961 |
||
962 |
/* |
|
789 | 963 |
* We don't allow recursive attributes.. |
964 |
* Maybe someday we will. |
|
965 |
*/ |
|
966 |
if (zdp->z_phys->zp_flags & ZFS_XATTR) { |
|
967 |
ZFS_EXIT(zfsvfs); |
|
968 |
return (EINVAL); |
|
969 |
} |
|
970 |
||
3280
e93ccc27c51d
6492686 NFSv4 client got EACCES over ZFS when trying to OPENATTR without createdir
ck153898
parents:
3271
diff
changeset
|
971 |
if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { |
789 | 972 |
ZFS_EXIT(zfsvfs); |
973 |
return (error); |
|
974 |
} |
|
975 |
||
976 |
/* |
|
977 |
* Do we have permission to get into attribute directory? |
|
978 |
*/ |
|
979 |
||
980 |
if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, cr)) { |
|
981 |
VN_RELE(*vpp); |
|
982 |
} |
|
983 |
||
984 |
ZFS_EXIT(zfsvfs); |
|
985 |
return (error); |
|
986 |
} |
|
987 |
||
1512 | 988 |
if (dvp->v_type != VDIR) { |
989 |
ZFS_EXIT(zfsvfs); |
|
1460
299d0ee75ed4
6371285 panic when nfs lookup operation attempted on plain file
marks
parents:
1417
diff
changeset
|
990 |
return (ENOTDIR); |
1512 | 991 |
} |
1460
299d0ee75ed4
6371285 panic when nfs lookup operation attempted on plain file
marks
parents:
1417
diff
changeset
|
992 |
|
789 | 993 |
/* |
994 |
* Check accessibility of directory. |
|
995 |
*/ |
|
996 |
||
997 |
if (error = zfs_zaccess(zdp, ACE_EXECUTE, cr)) { |
|
998 |
ZFS_EXIT(zfsvfs); |
|
999 |
return (error); |
|
1000 |
} |
|
1001 |
||
1002 |
if ((error = zfs_dirlook(zdp, nm, vpp)) == 0) { |
|
1003 |
||
1004 |
/* |
|
1005 |
* Convert device special files |
|
1006 |
*/ |
|
1007 |
if (IS_DEVVP(*vpp)) { |
|
1008 |
vnode_t *svp; |
|
1009 |
||
1010 |
svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); |
|
1011 |
VN_RELE(*vpp); |
|
1012 |
if (svp == NULL) |
|
1013 |
error = ENOSYS; |
|
1014 |
else |
|
1015 |
*vpp = svp; |
|
1016 |
} |
|
1017 |
} |
|
1018 |
||
1019 |
ZFS_EXIT(zfsvfs); |
|
1020 |
return (error); |
|
1021 |
} |
|
1022 |
||
1023 |
/* |
|
1024 |
* Attempt to create a new entry in a directory. If the entry |
|
1025 |
* already exists, truncate the file if permissible, else return |
|
1026 |
* an error. Return the vp of the created or trunc'd file. |
|
1027 |
* |
|
1028 |
* IN: dvp - vnode of directory to put new file entry in. |
|
1029 |
* name - name of new file entry. |
|
1030 |
* vap - attributes of new file. |
|
1031 |
* excl - flag indicating exclusive or non-exclusive mode. |
|
1032 |
* mode - mode to open file with. |
|
1033 |
* cr - credentials of caller. |
|
1034 |
* flag - large file flag [UNUSED]. |
|
1035 |
* |
|
1036 |
* OUT: vpp - vnode of created or trunc'd entry. |
|
1037 |
* |
|
1038 |
* RETURN: 0 if success |
|
1039 |
* error code if failure |
|
1040 |
* |
|
1041 |
* Timestamps: |
|
1042 |
* dvp - ctime|mtime updated if new entry created |
|
1043 |
* vp - ctime|mtime always, atime if new |
|
1044 |
*/ |
|
1045 |
/* ARGSUSED */ |
|
1046 |
static int |
|
1047 |
zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, |
|
1048 |
int mode, vnode_t **vpp, cred_t *cr, int flag) |
|
1049 |
{ |
|
1050 |
znode_t *zp, *dzp = VTOZ(dvp); |
|
1051 |
zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1052 |
zilog_t *zilog; |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1053 |
objset_t *os; |
789 | 1054 |
zfs_dirlock_t *dl; |
1055 |
dmu_tx_t *tx; |
|
1056 |
int error; |
|
1057 |
uint64_t zoid; |
|
1058 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1059 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, dzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1060 |
os = zfsvfs->z_os; |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1061 |
zilog = zfsvfs->z_log; |
789 | 1062 |
|
1063 |
top: |
|
1064 |
*vpp = NULL; |
|
1065 |
||
1066 |
if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) |
|
1067 |
vap->va_mode &= ~VSVTX; |
|
1068 |
||
1069 |
if (*name == '\0') { |
|
1070 |
/* |
|
1071 |
* Null component name refers to the directory itself. |
|
1072 |
*/ |
|
1073 |
VN_HOLD(dvp); |
|
1074 |
zp = dzp; |
|
1075 |
dl = NULL; |
|
1076 |
error = 0; |
|
1077 |
} else { |
|
1078 |
/* possible VN_HOLD(zp) */ |
|
1079 |
if (error = zfs_dirent_lock(&dl, dzp, name, &zp, 0)) { |
|
1080 |
if (strcmp(name, "..") == 0) |
|
1081 |
error = EISDIR; |
|
1082 |
ZFS_EXIT(zfsvfs); |
|
1083 |
return (error); |
|
1084 |
} |
|
1085 |
} |
|
1086 |
||
1087 |
zoid = zp ? zp->z_id : -1ULL; |
|
1088 |
||
1089 |
if (zp == NULL) { |
|
1090 |
/* |
|
1091 |
* Create a new file object and update the directory |
|
1092 |
* to reference it. |
|
1093 |
*/ |
|
1094 |
if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { |
|
1095 |
goto out; |
|
1096 |
} |
|
1097 |
||
1098 |
/* |
|
1099 |
* We only support the creation of regular files in |
|
1100 |
* extended attribute directories. |
|
1101 |
*/ |
|
1102 |
if ((dzp->z_phys->zp_flags & ZFS_XATTR) && |
|
1103 |
(vap->va_type != VREG)) { |
|
1104 |
error = EINVAL; |
|
1105 |
goto out; |
|
1106 |
} |
|
1107 |
||
1108 |
tx = dmu_tx_create(os); |
|
1109 |
dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); |
|
1110 |
dmu_tx_hold_bonus(tx, dzp->z_id); |
|
1544 | 1111 |
dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
789 | 1112 |
if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) |
1113 |
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
|
1114 |
0, SPA_MAXBLOCKSIZE); |
|
1115 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
|
1116 |
if (error) { |
|
1117 |
zfs_dirent_unlock(dl); |
|
1118 |
if (error == ERESTART && |
|
1119 |
zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1120 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1121 |
dmu_tx_abort(tx); |
789 | 1122 |
goto top; |
1123 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1124 |
dmu_tx_abort(tx); |
789 | 1125 |
ZFS_EXIT(zfsvfs); |
1126 |
return (error); |
|
1127 |
} |
|
1128 |
zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); |
|
1129 |
ASSERT(zp->z_id == zoid); |
|
1130 |
(void) zfs_link_create(dl, zp, tx, ZNEW); |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
1131 |
zfs_log_create(zilog, tx, TX_CREATE, dzp, zp, name); |
789 | 1132 |
dmu_tx_commit(tx); |
1133 |
} else { |
|
1134 |
/* |
|
1135 |
* A directory entry already exists for this name. |
|
1136 |
*/ |
|
1137 |
/* |
|
1138 |
* Can't truncate an existing file if in exclusive mode. |
|
1139 |
*/ |
|
1140 |
if (excl == EXCL) { |
|
1141 |
error = EEXIST; |
|
1142 |
goto out; |
|
1143 |
} |
|
1144 |
/* |
|
1145 |
* Can't open a directory for writing. |
|
1146 |
*/ |
|
1147 |
if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { |
|
1148 |
error = EISDIR; |
|
1149 |
goto out; |
|
1150 |
} |
|
1151 |
/* |
|
1152 |
* Verify requested access to file. |
|
1153 |
*/ |
|
1154 |
if (mode && (error = zfs_zaccess_rwx(zp, mode, cr))) { |
|
1155 |
goto out; |
|
1156 |
} |
|
1157 |
||
1158 |
mutex_enter(&dzp->z_lock); |
|
1159 |
dzp->z_seq++; |
|
1160 |
mutex_exit(&dzp->z_lock); |
|
1161 |
||
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1162 |
/* |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1163 |
* Truncate regular files if requested. |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1164 |
*/ |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1165 |
if ((ZTOV(zp)->v_type == VREG) && |
789 | 1166 |
(vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1167 |
error = zfs_freesp(zp, 0, 0, mode, TRUE); |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1168 |
if (error == ERESTART && |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1169 |
zfsvfs->z_assign == TXG_NOWAIT) { |
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1170 |
/* NB: we already did dmu_tx_wait() */ |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1171 |
zfs_dirent_unlock(dl); |
2365
2745d773b6bd
6447452 re-creating zfs files can lead to failure to unmount
perrin
parents:
2237
diff
changeset
|
1172 |
VN_RELE(ZTOV(zp)); |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1173 |
goto top; |
789 | 1174 |
} |
4863 | 1175 |
|
1176 |
if (error == 0) { |
|
1177 |
vnevent_create(ZTOV(zp)); |
|
1178 |
} |
|
789 | 1179 |
} |
1180 |
} |
|
1181 |
out: |
|
1182 |
||
1183 |
if (dl) |
|
1184 |
zfs_dirent_unlock(dl); |
|
1185 |
||
1186 |
if (error) { |
|
1187 |
if (zp) |
|
1188 |
VN_RELE(ZTOV(zp)); |
|
1189 |
} else { |
|
1190 |
*vpp = ZTOV(zp); |
|
1191 |
/* |
|
1192 |
* If vnode is for a device return a specfs vnode instead. |
|
1193 |
*/ |
|
1194 |
if (IS_DEVVP(*vpp)) { |
|
1195 |
struct vnode *svp; |
|
1196 |
||
1197 |
svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); |
|
1198 |
VN_RELE(*vpp); |
|
1199 |
if (svp == NULL) { |
|
1200 |
error = ENOSYS; |
|
1201 |
} |
|
1202 |
*vpp = svp; |
|
1203 |
} |
|
1204 |
} |
|
1205 |
||
1206 |
ZFS_EXIT(zfsvfs); |
|
1207 |
return (error); |
|
1208 |
} |
|
1209 |
||
1210 |
/* |
|
1211 |
* Remove an entry from a directory. |
|
1212 |
* |
|
1213 |
* IN: dvp - vnode of directory to remove entry from. |
|
1214 |
* name - name of entry to remove. |
|
1215 |
* cr - credentials of caller. |
|
1216 |
* |
|
1217 |
* RETURN: 0 if success |
|
1218 |
* error code if failure |
|
1219 |
* |
|
1220 |
* Timestamps: |
|
1221 |
* dvp - ctime|mtime |
|
1222 |
* vp - ctime (if nlink > 0) |
|
1223 |
*/ |
|
1224 |
static int |
|
1225 |
zfs_remove(vnode_t *dvp, char *name, cred_t *cr) |
|
1226 |
{ |
|
1227 |
znode_t *zp, *dzp = VTOZ(dvp); |
|
1228 |
znode_t *xzp = NULL; |
|
1229 |
vnode_t *vp; |
|
1230 |
zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1231 |
zilog_t *zilog; |
789 | 1232 |
uint64_t acl_obj, xattr_obj; |
1233 |
zfs_dirlock_t *dl; |
|
1234 |
dmu_tx_t *tx; |
|
3461 | 1235 |
boolean_t may_delete_now, delete_now = FALSE; |
1236 |
boolean_t unlinked; |
|
789 | 1237 |
int error; |
1238 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1239 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, dzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1240 |
zilog = zfsvfs->z_log; |
789 | 1241 |
|
1242 |
top: |
|
1243 |
/* |
|
1244 |
* Attempt to lock directory; fail if entry doesn't exist. |
|
1245 |
*/ |
|
1246 |
if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { |
|
1247 |
ZFS_EXIT(zfsvfs); |
|
1248 |
return (error); |
|
1249 |
} |
|
1250 |
||
1251 |
vp = ZTOV(zp); |
|
1252 |
||
1253 |
if (error = zfs_zaccess_delete(dzp, zp, cr)) { |
|
1254 |
goto out; |
|
1255 |
} |
|
1256 |
||
1257 |
/* |
|
1258 |
* Need to use rmdir for removing directories. |
|
1259 |
*/ |
|
1260 |
if (vp->v_type == VDIR) { |
|
1261 |
error = EPERM; |
|
1262 |
goto out; |
|
1263 |
} |
|
1264 |
||
4863 | 1265 |
vnevent_remove(vp, dvp, name); |
789 | 1266 |
|
1484
d330e98f8ed7
6350001 ZFS lookup performance still much slower than UFS : help tar : help spec SFS
ek110237
parents:
1472
diff
changeset
|
1267 |
dnlc_remove(dvp, name); |
d330e98f8ed7
6350001 ZFS lookup performance still much slower than UFS : help tar : help spec SFS
ek110237
parents:
1472
diff
changeset
|
1268 |
|
789 | 1269 |
mutex_enter(&vp->v_lock); |
1270 |
may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); |
|
1271 |
mutex_exit(&vp->v_lock); |
|
1272 |
||
1273 |
/* |
|
3461 | 1274 |
* We may delete the znode now, or we may put it in the unlinked set; |
789 | 1275 |
* it depends on whether we're the last link, and on whether there are |
1276 |
* other holds on the vnode. So we dmu_tx_hold() the right things to |
|
1277 |
* allow for either case. |
|
1278 |
*/ |
|
1279 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
1544 | 1280 |
dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); |
789 | 1281 |
dmu_tx_hold_bonus(tx, zp->z_id); |
1282 |
if (may_delete_now) |
|
1283 |
dmu_tx_hold_free(tx, zp->z_id, 0, DMU_OBJECT_END); |
|
1284 |
||
1285 |
/* are there any extended attributes? */ |
|
1286 |
if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { |
|
1287 |
/* XXX - do we need this if we are deleting? */ |
|
1288 |
dmu_tx_hold_bonus(tx, xattr_obj); |
|
1289 |
} |
|
1290 |
||
1291 |
/* are there any additional acls */ |
|
1292 |
if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && |
|
1293 |
may_delete_now) |
|
1294 |
dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); |
|
1295 |
||
1296 |
/* charge as an update -- would be nice not to charge at all */ |
|
3461 | 1297 |
dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
789 | 1298 |
|
1299 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
|
1300 |
if (error) { |
|
1301 |
zfs_dirent_unlock(dl); |
|
1302 |
VN_RELE(vp); |
|
1303 |
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1304 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1305 |
dmu_tx_abort(tx); |
789 | 1306 |
goto top; |
1307 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1308 |
dmu_tx_abort(tx); |
789 | 1309 |
ZFS_EXIT(zfsvfs); |
1310 |
return (error); |
|
1311 |
} |
|
1312 |
||
1313 |
/* |
|
1314 |
* Remove the directory entry. |
|
1315 |
*/ |
|
3461 | 1316 |
error = zfs_link_destroy(dl, zp, tx, 0, &unlinked); |
789 | 1317 |
|
1318 |
if (error) { |
|
1319 |
dmu_tx_commit(tx); |
|
1320 |
goto out; |
|
1321 |
} |
|
1322 |
||
3461 | 1323 |
if (unlinked) { |
789 | 1324 |
mutex_enter(&vp->v_lock); |
1325 |
delete_now = may_delete_now && |
|
1326 |
vp->v_count == 1 && !vn_has_cached_data(vp) && |
|
1327 |
zp->z_phys->zp_xattr == xattr_obj && |
|
1328 |
zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; |
|
1329 |
mutex_exit(&vp->v_lock); |
|
1330 |
} |
|
1331 |
||
1332 |
if (delete_now) { |
|
1333 |
if (zp->z_phys->zp_xattr) { |
|
1334 |
error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); |
|
1335 |
ASSERT3U(error, ==, 0); |
|
1336 |
ASSERT3U(xzp->z_phys->zp_links, ==, 2); |
|
1337 |
dmu_buf_will_dirty(xzp->z_dbuf, tx); |
|
1338 |
mutex_enter(&xzp->z_lock); |
|
3461 | 1339 |
xzp->z_unlinked = 1; |
789 | 1340 |
xzp->z_phys->zp_links = 0; |
1341 |
mutex_exit(&xzp->z_lock); |
|
3461 | 1342 |
zfs_unlinked_add(xzp, tx); |
789 | 1343 |
zp->z_phys->zp_xattr = 0; /* probably unnecessary */ |
1344 |
} |
|
1345 |
mutex_enter(&zp->z_lock); |
|
1346 |
mutex_enter(&vp->v_lock); |
|
1347 |
vp->v_count--; |
|
1348 |
ASSERT3U(vp->v_count, ==, 0); |
|
1349 |
mutex_exit(&vp->v_lock); |
|
1350 |
mutex_exit(&zp->z_lock); |
|
1351 |
zfs_znode_delete(zp, tx); |
|
1352 |
VFS_RELE(zfsvfs->z_vfs); |
|
3461 | 1353 |
} else if (unlinked) { |
1354 |
zfs_unlinked_add(zp, tx); |
|
789 | 1355 |
} |
1356 |
||
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
1357 |
zfs_log_remove(zilog, tx, TX_REMOVE, dzp, name); |
789 | 1358 |
|
1359 |
dmu_tx_commit(tx); |
|
1360 |
out: |
|
1361 |
zfs_dirent_unlock(dl); |
|
1362 |
||
1363 |
if (!delete_now) { |
|
1364 |
VN_RELE(vp); |
|
1365 |
} else if (xzp) { |
|
1366 |
/* this rele delayed to prevent nesting transactions */ |
|
1367 |
VN_RELE(ZTOV(xzp)); |
|
1368 |
} |
|
1369 |
||
1370 |
ZFS_EXIT(zfsvfs); |
|
1371 |
return (error); |
|
1372 |
} |
|
1373 |
||
1374 |
/* |
|
1375 |
* Create a new directory and insert it into dvp using the name |
|
1376 |
* provided. Return a pointer to the inserted directory. |
|
1377 |
* |
|
1378 |
* IN: dvp - vnode of directory to add subdir to. |
|
1379 |
* dirname - name of new directory. |
|
1380 |
* vap - attributes of new directory. |
|
1381 |
* cr - credentials of caller. |
|
1382 |
* |
|
1383 |
* OUT: vpp - vnode of created directory. |
|
1384 |
* |
|
1385 |
* RETURN: 0 if success |
|
1386 |
* error code if failure |
|
1387 |
* |
|
1388 |
* Timestamps: |
|
1389 |
* dvp - ctime|mtime updated |
|
1390 |
* vp - ctime|mtime|atime updated |
|
1391 |
*/ |
|
1392 |
static int |
|
1393 |
zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr) |
|
1394 |
{ |
|
1395 |
znode_t *zp, *dzp = VTOZ(dvp); |
|
1396 |
zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1397 |
zilog_t *zilog; |
789 | 1398 |
zfs_dirlock_t *dl; |
1399 |
uint64_t zoid = 0; |
|
1400 |
dmu_tx_t *tx; |
|
1401 |
int error; |
|
1402 |
||
1403 |
ASSERT(vap->va_type == VDIR); |
|
1404 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1405 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, dzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1406 |
zilog = zfsvfs->z_log; |
789 | 1407 |
|
1408 |
if (dzp->z_phys->zp_flags & ZFS_XATTR) { |
|
1409 |
ZFS_EXIT(zfsvfs); |
|
1410 |
return (EINVAL); |
|
1411 |
} |
|
1412 |
top: |
|
1413 |
*vpp = NULL; |
|
1414 |
||
1415 |
/* |
|
1416 |
* First make sure the new directory doesn't exist. |
|
1417 |
*/ |
|
1418 |
if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, ZNEW)) { |
|
1419 |
ZFS_EXIT(zfsvfs); |
|
1420 |
return (error); |
|
1421 |
} |
|
1422 |
||
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1423 |
if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, cr)) { |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1424 |
zfs_dirent_unlock(dl); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1425 |
ZFS_EXIT(zfsvfs); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1426 |
return (error); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1427 |
} |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1428 |
|
789 | 1429 |
/* |
1430 |
* Add a new entry to the directory. |
|
1431 |
*/ |
|
1432 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
1544 | 1433 |
dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); |
1434 |
dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); |
|
789 | 1435 |
if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) |
1436 |
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
|
1437 |
0, SPA_MAXBLOCKSIZE); |
|
1438 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
|
1439 |
if (error) { |
|
1440 |
zfs_dirent_unlock(dl); |
|
1441 |
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1442 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1443 |
dmu_tx_abort(tx); |
789 | 1444 |
goto top; |
1445 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1446 |
dmu_tx_abort(tx); |
789 | 1447 |
ZFS_EXIT(zfsvfs); |
1448 |
return (error); |
|
1449 |
} |
|
1450 |
||
1451 |
/* |
|
1452 |
* Create new node. |
|
1453 |
*/ |
|
1454 |
zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); |
|
1455 |
||
1456 |
/* |
|
1457 |
* Now put new name in parent dir. |
|
1458 |
*/ |
|
1459 |
(void) zfs_link_create(dl, zp, tx, ZNEW); |
|
1460 |
||
1461 |
*vpp = ZTOV(zp); |
|
1462 |
||
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
1463 |
zfs_log_create(zilog, tx, TX_MKDIR, dzp, zp, dirname); |
789 | 1464 |
dmu_tx_commit(tx); |
1465 |
||
1466 |
zfs_dirent_unlock(dl); |
|
1467 |
||
1468 |
ZFS_EXIT(zfsvfs); |
|
1469 |
return (0); |
|
1470 |
} |
|
1471 |
||
1472 |
/* |
|
1473 |
* Remove a directory subdir entry. If the current working |
|
1474 |
* directory is the same as the subdir to be removed, the |
|
1475 |
* remove will fail. |
|
1476 |
* |
|
1477 |
* IN: dvp - vnode of directory to remove from. |
|
1478 |
* name - name of directory to be removed. |
|
1479 |
* cwd - vnode of current working directory. |
|
1480 |
* cr - credentials of caller. |
|
1481 |
* |
|
1482 |
* RETURN: 0 if success |
|
1483 |
* error code if failure |
|
1484 |
* |
|
1485 |
* Timestamps: |
|
1486 |
* dvp - ctime|mtime updated |
|
1487 |
*/ |
|
1488 |
static int |
|
1489 |
zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr) |
|
1490 |
{ |
|
1491 |
znode_t *dzp = VTOZ(dvp); |
|
1492 |
znode_t *zp; |
|
1493 |
vnode_t *vp; |
|
1494 |
zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1495 |
zilog_t *zilog; |
789 | 1496 |
zfs_dirlock_t *dl; |
1497 |
dmu_tx_t *tx; |
|
1498 |
int error; |
|
1499 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1500 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, dzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1501 |
zilog = zfsvfs->z_log; |
789 | 1502 |
|
1503 |
top: |
|
1504 |
zp = NULL; |
|
1505 |
||
1506 |
/* |
|
1507 |
* Attempt to lock directory; fail if entry doesn't exist. |
|
1508 |
*/ |
|
1509 |
if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { |
|
1510 |
ZFS_EXIT(zfsvfs); |
|
1511 |
return (error); |
|
1512 |
} |
|
1513 |
||
1514 |
vp = ZTOV(zp); |
|
1515 |
||
1516 |
if (error = zfs_zaccess_delete(dzp, zp, cr)) { |
|
1517 |
goto out; |
|
1518 |
} |
|
1519 |
||
1520 |
if (vp->v_type != VDIR) { |
|
1521 |
error = ENOTDIR; |
|
1522 |
goto out; |
|
1523 |
} |
|
1524 |
||
1525 |
if (vp == cwd) { |
|
1526 |
error = EINVAL; |
|
1527 |
goto out; |
|
1528 |
} |
|
1529 |
||
4863 | 1530 |
vnevent_rmdir(vp, dvp, name); |
789 | 1531 |
|
1532 |
/* |
|
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1533 |
* Grab a lock on the directory to make sure that noone is |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1534 |
* trying to add (or lookup) entries while we are removing it. |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1535 |
*/ |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1536 |
rw_enter(&zp->z_name_lock, RW_WRITER); |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1537 |
|
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1538 |
/* |
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1539 |
* Grab a lock on the parent pointer to make sure we play well |
789 | 1540 |
* with the treewalk and directory rename code. |
1541 |
*/ |
|
1542 |
rw_enter(&zp->z_parent_lock, RW_WRITER); |
|
1543 |
||
1544 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
1544 | 1545 |
dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); |
789 | 1546 |
dmu_tx_hold_bonus(tx, zp->z_id); |
3461 | 1547 |
dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
789 | 1548 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
1549 |
if (error) { |
|
1550 |
rw_exit(&zp->z_parent_lock); |
|
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1551 |
rw_exit(&zp->z_name_lock); |
789 | 1552 |
zfs_dirent_unlock(dl); |
1553 |
VN_RELE(vp); |
|
1554 |
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1555 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1556 |
dmu_tx_abort(tx); |
789 | 1557 |
goto top; |
1558 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1559 |
dmu_tx_abort(tx); |
789 | 1560 |
ZFS_EXIT(zfsvfs); |
1561 |
return (error); |
|
1562 |
} |
|
1563 |
||
1564 |
error = zfs_link_destroy(dl, zp, tx, 0, NULL); |
|
1565 |
||
1566 |
if (error == 0) |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
1567 |
zfs_log_remove(zilog, tx, TX_RMDIR, dzp, name); |
789 | 1568 |
|
1569 |
dmu_tx_commit(tx); |
|
1570 |
||
1571 |
rw_exit(&zp->z_parent_lock); |
|
3897
278bade789ba
6437750 panic: db->db_buf==0||arc_referenced(db->db_buf), file: dbuf.c,line:1539
maybee
parents:
3638
diff
changeset
|
1572 |
rw_exit(&zp->z_name_lock); |
789 | 1573 |
out: |
1574 |
zfs_dirent_unlock(dl); |
|
1575 |
||
1576 |
VN_RELE(vp); |
|
1577 |
||
1578 |
ZFS_EXIT(zfsvfs); |
|
1579 |
return (error); |
|
1580 |
} |
|
1581 |
||
1582 |
/* |
|
1583 |
* Read as many directory entries as will fit into the provided |
|
1584 |
* buffer from the given directory cursor position (specified in |
|
1585 |
* the uio structure. |
|
1586 |
* |
|
1587 |
* IN: vp - vnode of directory to read. |
|
1588 |
* uio - structure supplying read location, range info, |
|
1589 |
* and return buffer. |
|
1590 |
* cr - credentials of caller. |
|
1591 |
* |
|
1592 |
* OUT: uio - updated offset and range, buffer filled. |
|
1593 |
* eofp - set to true if end-of-file detected. |
|
1594 |
* |
|
1595 |
* RETURN: 0 if success |
|
1596 |
* error code if failure |
|
1597 |
* |
|
1598 |
* Timestamps: |
|
1599 |
* vp - atime updated |
|
1600 |
* |
|
1601 |
* Note that the low 4 bits of the cookie returned by zap is always zero. |
|
1602 |
* This allows us to use the low range for "special" directory entries: |
|
1603 |
* We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, |
|
1604 |
* we use the offset 2 for the '.zfs' directory. |
|
1605 |
*/ |
|
1606 |
/* ARGSUSED */ |
|
1607 |
static int |
|
1608 |
zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp) |
|
1609 |
{ |
|
1610 |
znode_t *zp = VTOZ(vp); |
|
1611 |
iovec_t *iovp; |
|
1612 |
dirent64_t *odp; |
|
1613 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1614 |
objset_t *os; |
789 | 1615 |
caddr_t outbuf; |
1616 |
size_t bufsize; |
|
1617 |
zap_cursor_t zc; |
|
1618 |
zap_attribute_t zap; |
|
1619 |
uint_t bytes_wanted; |
|
1620 |
uint64_t offset; /* must be unsigned; checks for < 1 */ |
|
1621 |
int local_eof; |
|
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1622 |
int outcount; |
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1623 |
int error; |
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1624 |
uint8_t prefetch; |
789 | 1625 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1626 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 1627 |
|
1628 |
/* |
|
1629 |
* If we are not given an eof variable, |
|
1630 |
* use a local one. |
|
1631 |
*/ |
|
1632 |
if (eofp == NULL) |
|
1633 |
eofp = &local_eof; |
|
1634 |
||
1635 |
/* |
|
1636 |
* Check for valid iov_len. |
|
1637 |
*/ |
|
1638 |
if (uio->uio_iov->iov_len <= 0) { |
|
1639 |
ZFS_EXIT(zfsvfs); |
|
1640 |
return (EINVAL); |
|
1641 |
} |
|
1642 |
||
1643 |
/* |
|
1644 |
* Quit if directory has been removed (posix) |
|
1645 |
*/ |
|
3461 | 1646 |
if ((*eofp = zp->z_unlinked) != 0) { |
789 | 1647 |
ZFS_EXIT(zfsvfs); |
1648 |
return (0); |
|
1649 |
} |
|
1650 |
||
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1651 |
error = 0; |
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1652 |
os = zfsvfs->z_os; |
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1653 |
offset = uio->uio_loffset; |
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1654 |
prefetch = zp->z_zn_prefetch; |
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1655 |
|
789 | 1656 |
/* |
1657 |
* Initialize the iterator cursor. |
|
1658 |
*/ |
|
1659 |
if (offset <= 3) { |
|
1660 |
/* |
|
1661 |
* Start iteration from the beginning of the directory. |
|
1662 |
*/ |
|
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1663 |
zap_cursor_init(&zc, os, zp->z_id); |
789 | 1664 |
} else { |
1665 |
/* |
|
1666 |
* The offset is a serialized cursor. |
|
1667 |
*/ |
|
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1668 |
zap_cursor_init_serialized(&zc, os, zp->z_id, offset); |
789 | 1669 |
} |
1670 |
||
1671 |
/* |
|
1672 |
* Get space to change directory entries into fs independent format. |
|
1673 |
*/ |
|
1674 |
iovp = uio->uio_iov; |
|
1675 |
bytes_wanted = iovp->iov_len; |
|
1676 |
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { |
|
1677 |
bufsize = bytes_wanted; |
|
1678 |
outbuf = kmem_alloc(bufsize, KM_SLEEP); |
|
1679 |
odp = (struct dirent64 *)outbuf; |
|
1680 |
} else { |
|
1681 |
bufsize = bytes_wanted; |
|
1682 |
odp = (struct dirent64 *)iovp->iov_base; |
|
1683 |
} |
|
1684 |
||
1685 |
/* |
|
1686 |
* Transform to file-system independent format |
|
1687 |
*/ |
|
1688 |
outcount = 0; |
|
1689 |
while (outcount < bytes_wanted) { |
|
3912 | 1690 |
ino64_t objnum; |
1691 |
ushort_t reclen; |
|
1692 |
off64_t *next; |
|
1693 |
||
789 | 1694 |
/* |
1695 |
* Special case `.', `..', and `.zfs'. |
|
1696 |
*/ |
|
1697 |
if (offset == 0) { |
|
1698 |
(void) strcpy(zap.za_name, "."); |
|
3912 | 1699 |
objnum = zp->z_id; |
789 | 1700 |
} else if (offset == 1) { |
1701 |
(void) strcpy(zap.za_name, ".."); |
|
3912 | 1702 |
objnum = zp->z_phys->zp_parent; |
789 | 1703 |
} else if (offset == 2 && zfs_show_ctldir(zp)) { |
1704 |
(void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); |
|
3912 | 1705 |
objnum = ZFSCTL_INO_ROOT; |
789 | 1706 |
} else { |
1707 |
/* |
|
1708 |
* Grab next entry. |
|
1709 |
*/ |
|
1710 |
if (error = zap_cursor_retrieve(&zc, &zap)) { |
|
1711 |
if ((*eofp = (error == ENOENT)) != 0) |
|
1712 |
break; |
|
1713 |
else |
|
1714 |
goto update; |
|
1715 |
} |
|
1716 |
||
1717 |
if (zap.za_integer_length != 8 || |
|
1718 |
zap.za_num_integers != 1) { |
|
1719 |
cmn_err(CE_WARN, "zap_readdir: bad directory " |
|
1720 |
"entry, obj = %lld, offset = %lld\n", |
|
1721 |
(u_longlong_t)zp->z_id, |
|
1722 |
(u_longlong_t)offset); |
|
1723 |
error = ENXIO; |
|
1724 |
goto update; |
|
1725 |
} |
|
3912 | 1726 |
|
1727 |
objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); |
|
1728 |
/* |
|
1729 |
* MacOS X can extract the object type here such as: |
|
1730 |
* uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); |
|
1731 |
*/ |
|
789 | 1732 |
} |
3912 | 1733 |
reclen = DIRENT64_RECLEN(strlen(zap.za_name)); |
789 | 1734 |
|
1735 |
/* |
|
1736 |
* Will this entry fit in the buffer? |
|
1737 |
*/ |
|
3912 | 1738 |
if (outcount + reclen > bufsize) { |
789 | 1739 |
/* |
1740 |
* Did we manage to fit anything in the buffer? |
|
1741 |
*/ |
|
1742 |
if (!outcount) { |
|
1743 |
error = EINVAL; |
|
1744 |
goto update; |
|
1745 |
} |
|
1746 |
break; |
|
1747 |
} |
|
1748 |
/* |
|
1749 |
* Add this entry: |
|
1750 |
*/ |
|
3912 | 1751 |
odp->d_ino = objnum; |
1752 |
odp->d_reclen = reclen; |
|
789 | 1753 |
/* NOTE: d_off is the offset for the *next* entry */ |
1754 |
next = &(odp->d_off); |
|
1755 |
(void) strncpy(odp->d_name, zap.za_name, |
|
3912 | 1756 |
DIRENT64_NAMELEN(reclen)); |
1757 |
outcount += reclen; |
|
1758 |
odp = (dirent64_t *)((intptr_t)odp + reclen); |
|
789 | 1759 |
|
1760 |
ASSERT(outcount <= bufsize); |
|
1761 |
||
1762 |
/* Prefetch znode */ |
|
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1763 |
if (prefetch) |
3912 | 1764 |
dmu_prefetch(os, objnum, 0, 0); |
789 | 1765 |
|
1766 |
/* |
|
1767 |
* Move to the next entry, fill in the previous offset. |
|
1768 |
*/ |
|
1769 |
if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { |
|
1770 |
zap_cursor_advance(&zc); |
|
1771 |
offset = zap_cursor_serialize(&zc); |
|
1772 |
} else { |
|
1773 |
offset += 1; |
|
1774 |
} |
|
1775 |
*next = offset; |
|
1776 |
} |
|
869
dc133b87dfb3
6297285 znode prefetching in zfs_readdir causes 5x performance degradation for 'ls'
perrin
parents:
789
diff
changeset
|
1777 |
zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ |
789 | 1778 |
|
1779 |
if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { |
|
1780 |
iovp->iov_base += outcount; |
|
1781 |
iovp->iov_len -= outcount; |
|
1782 |
uio->uio_resid -= outcount; |
|
1783 |
} else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { |
|
1784 |
/* |
|
1785 |
* Reset the pointer. |
|
1786 |
*/ |
|
1787 |
offset = uio->uio_loffset; |
|
1788 |
} |
|
1789 |
||
1790 |
update: |
|
885
d925b21dba78
6347493 tar of 25K empty directory entries in ZFS takes 30+ seconds ...
ahrens
parents:
869
diff
changeset
|
1791 |
zap_cursor_fini(&zc); |
789 | 1792 |
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) |
1793 |
kmem_free(outbuf, bufsize); |
|
1794 |
||
1795 |
if (error == ENOENT) |
|
1796 |
error = 0; |
|
1797 |
||
1798 |
ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
|
1799 |
||
1800 |
uio->uio_loffset = offset; |
|
1801 |
ZFS_EXIT(zfsvfs); |
|
1802 |
return (error); |
|
1803 |
} |
|
1804 |
||
4720
8edc0d2e6f3f
6535160 Lock contention on zl_lock from zil_commit
fr157268
parents:
4709
diff
changeset
|
1805 |
ulong_t zfs_fsync_sync_cnt = 4; |
8edc0d2e6f3f
6535160 Lock contention on zl_lock from zil_commit
fr157268
parents:
4709
diff
changeset
|
1806 |
|
789 | 1807 |
static int |
1808 |
zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr) |
|
1809 |
{ |
|
1810 |
znode_t *zp = VTOZ(vp); |
|
1811 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
1812 |
||
1773
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1813 |
/* |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1814 |
* Regardless of whether this is required for standards conformance, |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1815 |
* this is the logical behavior when fsync() is called on a file with |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1816 |
* dirty pages. We use B_ASYNC since the ZIL transactions are already |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1817 |
* going to be pushed out as part of the zil_commit(). |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1818 |
*/ |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1819 |
if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1820 |
(vp->v_type == VREG) && !(IS_SWAPVP(vp))) |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1821 |
(void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr); |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
1822 |
|
4720
8edc0d2e6f3f
6535160 Lock contention on zl_lock from zil_commit
fr157268
parents:
4709
diff
changeset
|
1823 |
(void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); |
8edc0d2e6f3f
6535160 Lock contention on zl_lock from zil_commit
fr157268
parents:
4709
diff
changeset
|
1824 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1825 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
1826 |
zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); |
789 | 1827 |
ZFS_EXIT(zfsvfs); |
1828 |
return (0); |
|
1829 |
} |
|
1830 |
||
1831 |
/* |
|
1832 |
* Get the requested file attributes and place them in the provided |
|
1833 |
* vattr structure. |
|
1834 |
* |
|
1835 |
* IN: vp - vnode of file. |
|
1836 |
* vap - va_mask identifies requested attributes. |
|
1837 |
* flags - [UNUSED] |
|
1838 |
* cr - credentials of caller. |
|
1839 |
* |
|
1840 |
* OUT: vap - attribute values. |
|
1841 |
* |
|
1842 |
* RETURN: 0 (always succeeds) |
|
1843 |
*/ |
|
1844 |
/* ARGSUSED */ |
|
1845 |
static int |
|
1846 |
zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr) |
|
1847 |
{ |
|
1848 |
znode_t *zp = VTOZ(vp); |
|
1849 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1850 |
znode_phys_t *pzp; |
789 | 1851 |
int error; |
4543 | 1852 |
uint64_t links; |
789 | 1853 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1854 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1855 |
pzp = zp->z_phys; |
789 | 1856 |
|
1857 |
/* |
|
1858 |
* Return all attributes. It's cheaper to provide the answer |
|
1859 |
* than to determine whether we were asked the question. |
|
1860 |
*/ |
|
1861 |
mutex_enter(&zp->z_lock); |
|
1862 |
||
1863 |
vap->va_type = vp->v_type; |
|
1864 |
vap->va_mode = pzp->zp_mode & MODEMASK; |
|
1865 |
vap->va_uid = zp->z_phys->zp_uid; |
|
1866 |
vap->va_gid = zp->z_phys->zp_gid; |
|
1867 |
vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; |
|
1868 |
vap->va_nodeid = zp->z_id; |
|
4543 | 1869 |
if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) |
1870 |
links = pzp->zp_links + 1; |
|
1871 |
else |
|
1872 |
links = pzp->zp_links; |
|
1873 |
vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ |
|
789 | 1874 |
vap->va_size = pzp->zp_size; |
1816
8c14b56c8515
6408482 64-bit system can't read some 32-bit dev_ts created on zfs
marks
parents:
1773
diff
changeset
|
1875 |
vap->va_rdev = vp->v_rdev; |
789 | 1876 |
vap->va_seq = zp->z_seq; |
1877 |
||
1878 |
ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); |
|
1879 |
ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); |
|
1880 |
ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); |
|
1881 |
||
1882 |
/* |
|
905
920e9b2e0899
6347134 zfs_zaccess() is killing ZFS stat() performance
marks
parents:
885
diff
changeset
|
1883 |
* If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. |
920e9b2e0899
6347134 zfs_zaccess() is killing ZFS stat() performance
marks
parents:
885
diff
changeset
|
1884 |
* Also, if we are the owner don't bother, since owner should |
920e9b2e0899
6347134 zfs_zaccess() is killing ZFS stat() performance
marks
parents:
885
diff
changeset
|
1885 |
* always be allowed to read basic attributes of file. |
789 | 1886 |
*/ |
905
920e9b2e0899
6347134 zfs_zaccess() is killing ZFS stat() performance
marks
parents:
885
diff
changeset
|
1887 |
if (!(zp->z_phys->zp_flags & ZFS_ACL_TRIVIAL) && |
920e9b2e0899
6347134 zfs_zaccess() is killing ZFS stat() performance
marks
parents:
885
diff
changeset
|
1888 |
(zp->z_phys->zp_uid != crgetuid(cr))) { |
920e9b2e0899
6347134 zfs_zaccess() is killing ZFS stat() performance
marks
parents:
885
diff
changeset
|
1889 |
if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, cr)) { |
789 | 1890 |
mutex_exit(&zp->z_lock); |
1891 |
ZFS_EXIT(zfsvfs); |
|
1892 |
return (error); |
|
1893 |
} |
|
1894 |
} |
|
1895 |
||
1896 |
mutex_exit(&zp->z_lock); |
|
1897 |
||
1898 |
dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); |
|
1899 |
||
1900 |
if (zp->z_blksz == 0) { |
|
1901 |
/* |
|
1902 |
* Block size hasn't been set; suggest maximal I/O transfers. |
|
1903 |
*/ |
|
1904 |
vap->va_blksize = zfsvfs->z_max_blksz; |
|
1905 |
} |
|
1906 |
||
1907 |
ZFS_EXIT(zfsvfs); |
|
1908 |
return (0); |
|
1909 |
} |
|
1910 |
||
1911 |
/* |
|
1912 |
* Set the file attributes to the values contained in the |
|
1913 |
* vattr structure. |
|
1914 |
* |
|
1915 |
* IN: vp - vnode of file to be modified. |
|
1916 |
* vap - new attribute values. |
|
1917 |
* flags - ATTR_UTIME set if non-default time values provided. |
|
1918 |
* cr - credentials of caller. |
|
1919 |
* |
|
1920 |
* RETURN: 0 if success |
|
1921 |
* error code if failure |
|
1922 |
* |
|
1923 |
* Timestamps: |
|
1924 |
* vp - ctime updated, mtime updated if size changed. |
|
1925 |
*/ |
|
1926 |
/* ARGSUSED */ |
|
1927 |
static int |
|
1928 |
zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, |
|
1929 |
caller_context_t *ct) |
|
1930 |
{ |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1931 |
znode_t *zp = VTOZ(vp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1932 |
znode_phys_t *pzp; |
789 | 1933 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1934 |
zilog_t *zilog; |
789 | 1935 |
dmu_tx_t *tx; |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1936 |
vattr_t oldva; |
789 | 1937 |
uint_t mask = vap->va_mask; |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1938 |
uint_t saved_mask; |
2796
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
1939 |
int trim_mask = 0; |
789 | 1940 |
uint64_t new_mode; |
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1941 |
znode_t *attrzp; |
789 | 1942 |
int need_policy = FALSE; |
1943 |
int err; |
|
1944 |
||
1945 |
if (mask == 0) |
|
1946 |
return (0); |
|
1947 |
||
1948 |
if (mask & AT_NOSET) |
|
1949 |
return (EINVAL); |
|
1950 |
||
1951 |
if (mask & AT_SIZE && vp->v_type == VDIR) |
|
1952 |
return (EISDIR); |
|
1953 |
||
1394
e8d500b79ced
6381600 tc_open.021 in mstc testsuite is returning -1 when run on a zfs
marks
parents:
1308
diff
changeset
|
1954 |
if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) |
1308
997e6a49c409
6362908 nfsv4-test: RENAME does not check PERM with NFSv4/ZFS
marks
parents:
1298
diff
changeset
|
1955 |
return (EINVAL); |
997e6a49c409
6362908 nfsv4-test: RENAME does not check PERM with NFSv4/ZFS
marks
parents:
1298
diff
changeset
|
1956 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1957 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1958 |
pzp = zp->z_phys; |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
1959 |
zilog = zfsvfs->z_log; |
789 | 1960 |
|
1961 |
top: |
|
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
1962 |
attrzp = NULL; |
789 | 1963 |
|
1964 |
if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { |
|
1965 |
ZFS_EXIT(zfsvfs); |
|
1966 |
return (EROFS); |
|
1967 |
} |
|
1968 |
||
1969 |
/* |
|
1970 |
* First validate permissions |
|
1971 |
*/ |
|
1972 |
||
1973 |
if (mask & AT_SIZE) { |
|
1974 |
err = zfs_zaccess(zp, ACE_WRITE_DATA, cr); |
|
1975 |
if (err) { |
|
1976 |
ZFS_EXIT(zfsvfs); |
|
1977 |
return (err); |
|
1978 |
} |
|
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1979 |
/* |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1980 |
* XXX - Note, we are not providing any open |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1981 |
* mode flags here (like FNDELAY), so we may |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1982 |
* block if there are locks present... this |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1983 |
* should be addressed in openat(). |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1984 |
*/ |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1985 |
do { |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1986 |
err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); |
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
1987 |
/* NB: we already did dmu_tx_wait() if necessary */ |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1988 |
} while (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT); |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1989 |
if (err) { |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1990 |
ZFS_EXIT(zfsvfs); |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1991 |
return (err); |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
1992 |
} |
789 | 1993 |
} |
1994 |
||
1995 |
if (mask & (AT_ATIME|AT_MTIME)) |
|
1996 |
need_policy = zfs_zaccess_v4_perm(zp, ACE_WRITE_ATTRIBUTES, cr); |
|
1997 |
||
1998 |
if (mask & (AT_UID|AT_GID)) { |
|
1999 |
int idmask = (mask & (AT_UID|AT_GID)); |
|
2000 |
int take_owner; |
|
2001 |
int take_group; |
|
2002 |
||
2003 |
/* |
|
913
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2004 |
* NOTE: even if a new mode is being set, |
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2005 |
* we may clear S_ISUID/S_ISGID bits. |
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2006 |
*/ |
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2007 |
|
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2008 |
if (!(mask & AT_MODE)) |
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2009 |
vap->va_mode = pzp->zp_mode; |
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2010 |
|
e99aef503251
6299353 chown(2) fails to clear SUID/SGID bits on ZFS.
marks
parents:
905
diff
changeset
|
2011 |
/* |
789 | 2012 |
* Take ownership or chgrp to group we are a member of |
2013 |
*/ |
|
2014 |
||
2015 |
take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); |
|
2016 |
take_group = (mask & AT_GID) && groupmember(vap->va_gid, cr); |
|
2017 |
||
2018 |
/* |
|
2019 |
* If both AT_UID and AT_GID are set then take_owner and |
|
2020 |
* take_group must both be set in order to allow taking |
|
2021 |
* ownership. |
|
2022 |
* |
|
2023 |
* Otherwise, send the check through secpolicy_vnode_setattr() |
|
2024 |
* |
|
2025 |
*/ |
|
2026 |
||
2027 |
if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || |
|
2028 |
((idmask == AT_UID) && take_owner) || |
|
2029 |
((idmask == AT_GID) && take_group)) { |
|
2030 |
if (zfs_zaccess_v4_perm(zp, ACE_WRITE_OWNER, cr) == 0) { |
|
2031 |
/* |
|
2032 |
* Remove setuid/setgid for non-privileged users |
|
2033 |
*/ |
|
1115 | 2034 |
secpolicy_setid_clear(vap, cr); |
2796
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2035 |
trim_mask = (mask & (AT_UID|AT_GID)); |
789 | 2036 |
} else { |
2037 |
need_policy = TRUE; |
|
2038 |
} |
|
2039 |
} else { |
|
2040 |
need_policy = TRUE; |
|
2041 |
} |
|
2042 |
} |
|
2043 |
||
2796
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2044 |
mutex_enter(&zp->z_lock); |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2045 |
oldva.va_mode = pzp->zp_mode; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2046 |
oldva.va_uid = zp->z_phys->zp_uid; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2047 |
oldva.va_gid = zp->z_phys->zp_gid; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2048 |
mutex_exit(&zp->z_lock); |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2049 |
|
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2050 |
if (mask & AT_MODE) { |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2051 |
if (zfs_zaccess_v4_perm(zp, ACE_WRITE_ACL, cr) == 0) { |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2052 |
err = secpolicy_setid_setsticky_clear(vp, vap, |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2053 |
&oldva, cr); |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2054 |
if (err) { |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2055 |
ZFS_EXIT(zfsvfs); |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2056 |
return (err); |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2057 |
} |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2058 |
trim_mask |= AT_MODE; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2059 |
} else { |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2060 |
need_policy = TRUE; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2061 |
} |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2062 |
} |
789 | 2063 |
|
2064 |
if (need_policy) { |
|
1115 | 2065 |
/* |
2066 |
* If trim_mask is set then take ownership |
|
2796
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2067 |
* has been granted or write_acl is present and user |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2068 |
* has the ability to modify mode. In that case remove |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2069 |
* UID|GID and or MODE from mask so that |
1115 | 2070 |
* secpolicy_vnode_setattr() doesn't revoke it. |
2071 |
*/ |
|
2796
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2072 |
|
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2073 |
if (trim_mask) { |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2074 |
saved_mask = vap->va_mask; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2075 |
vap->va_mask &= ~trim_mask; |
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2076 |
|
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2077 |
} |
789 | 2078 |
err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, |
2079 |
(int (*)(void *, int, cred_t *))zfs_zaccess_rwx, zp); |
|
2080 |
if (err) { |
|
2081 |
ZFS_EXIT(zfsvfs); |
|
2082 |
return (err); |
|
2083 |
} |
|
1115 | 2084 |
|
2085 |
if (trim_mask) |
|
2796
95109e1ced2b
6445680 Having write_acl allowed in an ACL doesn't give the ability to set the mode via chmod
marks
parents:
2752
diff
changeset
|
2086 |
vap->va_mask |= saved_mask; |
789 | 2087 |
} |
2088 |
||
2089 |
/* |
|
2090 |
* secpolicy_vnode_setattr, or take ownership may have |
|
2091 |
* changed va_mask |
|
2092 |
*/ |
|
2093 |
mask = vap->va_mask; |
|
2094 |
||
2095 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
2096 |
dmu_tx_hold_bonus(tx, zp->z_id); |
|
2097 |
||
2098 |
if (mask & AT_MODE) { |
|
1576
0364d1928a7f
6380036 zfs does not clear S_ISUID and S_ISGID bits on successful writes
marks
parents:
1544
diff
changeset
|
2099 |
uint64_t pmode = pzp->zp_mode; |
0364d1928a7f
6380036 zfs does not clear S_ISUID and S_ISGID bits on successful writes
marks
parents:
1544
diff
changeset
|
2100 |
|
0364d1928a7f
6380036 zfs does not clear S_ISUID and S_ISGID bits on successful writes
marks
parents:
1544
diff
changeset
|
2101 |
new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); |
789 | 2102 |
|
2103 |
if (zp->z_phys->zp_acl.z_acl_extern_obj) |
|
2104 |
dmu_tx_hold_write(tx, |
|
2105 |
pzp->zp_acl.z_acl_extern_obj, 0, SPA_MAXBLOCKSIZE); |
|
2106 |
else |
|
2107 |
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, |
|
2108 |
0, ZFS_ACL_SIZE(MAX_ACL_SIZE)); |
|
2109 |
} |
|
2110 |
||
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2111 |
if ((mask & (AT_UID | AT_GID)) && zp->z_phys->zp_xattr != 0) { |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2112 |
err = zfs_zget(zp->z_zfsvfs, zp->z_phys->zp_xattr, &attrzp); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2113 |
if (err) { |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2114 |
dmu_tx_abort(tx); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2115 |
ZFS_EXIT(zfsvfs); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2116 |
return (err); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2117 |
} |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2118 |
dmu_tx_hold_bonus(tx, attrzp->z_id); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2119 |
} |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2120 |
|
789 | 2121 |
err = dmu_tx_assign(tx, zfsvfs->z_assign); |
2122 |
if (err) { |
|
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2123 |
if (attrzp) |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2124 |
VN_RELE(ZTOV(attrzp)); |
789 | 2125 |
if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2126 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2127 |
dmu_tx_abort(tx); |
789 | 2128 |
goto top; |
2129 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2130 |
dmu_tx_abort(tx); |
789 | 2131 |
ZFS_EXIT(zfsvfs); |
2132 |
return (err); |
|
2133 |
} |
|
2134 |
||
2135 |
dmu_buf_will_dirty(zp->z_dbuf, tx); |
|
2136 |
||
2137 |
/* |
|
2138 |
* Set each attribute requested. |
|
2139 |
* We group settings according to the locks they need to acquire. |
|
2140 |
* |
|
2141 |
* Note: you cannot set ctime directly, although it will be |
|
2142 |
* updated as a side-effect of calling this function. |
|
2143 |
*/ |
|
2144 |
||
2145 |
mutex_enter(&zp->z_lock); |
|
2146 |
||
2147 |
if (mask & AT_MODE) { |
|
2148 |
err = zfs_acl_chmod_setattr(zp, new_mode, tx); |
|
2149 |
ASSERT3U(err, ==, 0); |
|
2150 |
} |
|
2151 |
||
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2152 |
if (attrzp) |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2153 |
mutex_enter(&attrzp->z_lock); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2154 |
|
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2155 |
if (mask & AT_UID) { |
789 | 2156 |
zp->z_phys->zp_uid = (uint64_t)vap->va_uid; |
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2157 |
if (attrzp) { |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2158 |
attrzp->z_phys->zp_uid = (uint64_t)vap->va_uid; |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2159 |
} |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2160 |
} |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2161 |
|
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2162 |
if (mask & AT_GID) { |
789 | 2163 |
zp->z_phys->zp_gid = (uint64_t)vap->va_gid; |
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2164 |
if (attrzp) |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2165 |
attrzp->z_phys->zp_gid = (uint64_t)vap->va_gid; |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2166 |
} |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2167 |
|
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2168 |
if (attrzp) |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2169 |
mutex_exit(&attrzp->z_lock); |
789 | 2170 |
|
2171 |
if (mask & AT_ATIME) |
|
2172 |
ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); |
|
2173 |
||
2174 |
if (mask & AT_MTIME) |
|
2175 |
ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); |
|
2176 |
||
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
2177 |
if (mask & AT_SIZE) |
789 | 2178 |
zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
2179 |
else if (mask != 0) |
789 | 2180 |
zfs_time_stamper_locked(zp, STATE_CHANGED, tx); |
2181 |
||
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
2182 |
if (mask != 0) |
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
2183 |
zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask); |
789 | 2184 |
|
2185 |
mutex_exit(&zp->z_lock); |
|
2186 |
||
1231
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2187 |
if (attrzp) |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2188 |
VN_RELE(ZTOV(attrzp)); |
64215f768e86
6354804 The file's ACL was changed when cp it from one ZFS file system to another one.
marks
parents:
1141
diff
changeset
|
2189 |
|
789 | 2190 |
dmu_tx_commit(tx); |
2191 |
||
2192 |
ZFS_EXIT(zfsvfs); |
|
2193 |
return (err); |
|
2194 |
} |
|
2195 |
||
3271 | 2196 |
typedef struct zfs_zlock { |
2197 |
krwlock_t *zl_rwlock; /* lock we acquired */ |
|
2198 |
znode_t *zl_znode; /* znode we held */ |
|
2199 |
struct zfs_zlock *zl_next; /* next in list */ |
|
2200 |
} zfs_zlock_t; |
|
2201 |
||
2202 |
/* |
|
2203 |
* Drop locks and release vnodes that were held by zfs_rename_lock(). |
|
2204 |
*/ |
|
2205 |
static void |
|
2206 |
zfs_rename_unlock(zfs_zlock_t **zlpp) |
|
2207 |
{ |
|
2208 |
zfs_zlock_t *zl; |
|
2209 |
||
2210 |
while ((zl = *zlpp) != NULL) { |
|
2211 |
if (zl->zl_znode != NULL) |
|
2212 |
VN_RELE(ZTOV(zl->zl_znode)); |
|
2213 |
rw_exit(zl->zl_rwlock); |
|
2214 |
*zlpp = zl->zl_next; |
|
2215 |
kmem_free(zl, sizeof (*zl)); |
|
2216 |
} |
|
2217 |
} |
|
2218 |
||
789 | 2219 |
/* |
2220 |
* Search back through the directory tree, using the ".." entries. |
|
2221 |
* Lock each directory in the chain to prevent concurrent renames. |
|
2222 |
* Fail any attempt to move a directory into one of its own descendants. |
|
2223 |
* XXX - z_parent_lock can overlap with map or grow locks |
|
2224 |
*/ |
|
2225 |
static int |
|
2226 |
zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) |
|
2227 |
{ |
|
2228 |
zfs_zlock_t *zl; |
|
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
2229 |
znode_t *zp = tdzp; |
789 | 2230 |
uint64_t rootid = zp->z_zfsvfs->z_root; |
2231 |
uint64_t *oidp = &zp->z_id; |
|
2232 |
krwlock_t *rwlp = &szp->z_parent_lock; |
|
2233 |
krw_t rw = RW_WRITER; |
|
2234 |
||
2235 |
/* |
|
2236 |
* First pass write-locks szp and compares to zp->z_id. |
|
2237 |
* Later passes read-lock zp and compare to zp->z_parent. |
|
2238 |
*/ |
|
2239 |
do { |
|
3271 | 2240 |
if (!rw_tryenter(rwlp, rw)) { |
2241 |
/* |
|
2242 |
* Another thread is renaming in this path. |
|
2243 |
* Note that if we are a WRITER, we don't have any |
|
2244 |
* parent_locks held yet. |
|
2245 |
*/ |
|
2246 |
if (rw == RW_READER && zp->z_id > szp->z_id) { |
|
2247 |
/* |
|
2248 |
* Drop our locks and restart |
|
2249 |
*/ |
|
2250 |
zfs_rename_unlock(&zl); |
|
2251 |
*zlpp = NULL; |
|
2252 |
zp = tdzp; |
|
2253 |
oidp = &zp->z_id; |
|
2254 |
rwlp = &szp->z_parent_lock; |
|
2255 |
rw = RW_WRITER; |
|
2256 |
continue; |
|
2257 |
} else { |
|
2258 |
/* |
|
2259 |
* Wait for other thread to drop its locks |
|
2260 |
*/ |
|
2261 |
rw_enter(rwlp, rw); |
|
2262 |
} |
|
2263 |
} |
|
2264 |
||
789 | 2265 |
zl = kmem_alloc(sizeof (*zl), KM_SLEEP); |
2266 |
zl->zl_rwlock = rwlp; |
|
2267 |
zl->zl_znode = NULL; |
|
2268 |
zl->zl_next = *zlpp; |
|
2269 |
*zlpp = zl; |
|
2270 |
||
2271 |
if (*oidp == szp->z_id) /* We're a descendant of szp */ |
|
2272 |
return (EINVAL); |
|
2273 |
||
2274 |
if (*oidp == rootid) /* We've hit the top */ |
|
2275 |
return (0); |
|
2276 |
||
2277 |
if (rw == RW_READER) { /* i.e. not the first pass */ |
|
2278 |
int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); |
|
2279 |
if (error) |
|
2280 |
return (error); |
|
2281 |
zl->zl_znode = zp; |
|
2282 |
} |
|
2283 |
oidp = &zp->z_phys->zp_parent; |
|
2284 |
rwlp = &zp->z_parent_lock; |
|
2285 |
rw = RW_READER; |
|
2286 |
||
2287 |
} while (zp->z_id != sdzp->z_id); |
|
2288 |
||
2289 |
return (0); |
|
2290 |
} |
|
2291 |
||
2292 |
/* |
|
2293 |
* Move an entry from the provided source directory to the target |
|
2294 |
* directory. Change the entry name as indicated. |
|
2295 |
* |
|
2296 |
* IN: sdvp - Source directory containing the "old entry". |
|
2297 |
* snm - Old entry name. |
|
2298 |
* tdvp - Target directory to contain the "new entry". |
|
2299 |
* tnm - New entry name. |
|
2300 |
* cr - credentials of caller. |
|
2301 |
* |
|
2302 |
* RETURN: 0 if success |
|
2303 |
* error code if failure |
|
2304 |
* |
|
2305 |
* Timestamps: |
|
2306 |
* sdvp,tdvp - ctime|mtime updated |
|
2307 |
*/ |
|
2308 |
static int |
|
2309 |
zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr) |
|
2310 |
{ |
|
2311 |
znode_t *tdzp, *szp, *tzp; |
|
2312 |
znode_t *sdzp = VTOZ(sdvp); |
|
2313 |
zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2314 |
zilog_t *zilog; |
789 | 2315 |
vnode_t *realvp; |
2316 |
zfs_dirlock_t *sdl, *tdl; |
|
2317 |
dmu_tx_t *tx; |
|
2318 |
zfs_zlock_t *zl; |
|
2319 |
int cmp, serr, terr, error; |
|
2320 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2321 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, sdzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2322 |
zilog = zfsvfs->z_log; |
789 | 2323 |
|
2324 |
/* |
|
2325 |
* Make sure we have the real vp for the target directory. |
|
2326 |
*/ |
|
2327 |
if (VOP_REALVP(tdvp, &realvp) == 0) |
|
2328 |
tdvp = realvp; |
|
2329 |
||
2330 |
if (tdvp->v_vfsp != sdvp->v_vfsp) { |
|
2331 |
ZFS_EXIT(zfsvfs); |
|
2332 |
return (EXDEV); |
|
2333 |
} |
|
2334 |
||
2335 |
tdzp = VTOZ(tdvp); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2336 |
if (!tdzp->z_dbuf_held) { |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2337 |
ZFS_EXIT(zfsvfs); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2338 |
return (EIO); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2339 |
} |
789 | 2340 |
top: |
2341 |
szp = NULL; |
|
2342 |
tzp = NULL; |
|
2343 |
zl = NULL; |
|
2344 |
||
2345 |
/* |
|
2346 |
* This is to prevent the creation of links into attribute space |
|
2347 |
* by renaming a linked file into/outof an attribute directory. |
|
2348 |
* See the comment in zfs_link() for why this is considered bad. |
|
2349 |
*/ |
|
2350 |
if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != |
|
2351 |
(sdzp->z_phys->zp_flags & ZFS_XATTR)) { |
|
2352 |
ZFS_EXIT(zfsvfs); |
|
2353 |
return (EINVAL); |
|
2354 |
} |
|
2355 |
||
2356 |
/* |
|
2357 |
* Lock source and target directory entries. To prevent deadlock, |
|
2358 |
* a lock ordering must be defined. We lock the directory with |
|
2359 |
* the smallest object id first, or if it's a tie, the one with |
|
2360 |
* the lexically first name. |
|
2361 |
*/ |
|
2362 |
if (sdzp->z_id < tdzp->z_id) { |
|
2363 |
cmp = -1; |
|
2364 |
} else if (sdzp->z_id > tdzp->z_id) { |
|
2365 |
cmp = 1; |
|
2366 |
} else { |
|
2367 |
cmp = strcmp(snm, tnm); |
|
2368 |
if (cmp == 0) { |
|
2369 |
/* |
|
2370 |
* POSIX: "If the old argument and the new argument |
|
2371 |
* both refer to links to the same existing file, |
|
2372 |
* the rename() function shall return successfully |
|
2373 |
* and perform no other action." |
|
2374 |
*/ |
|
2375 |
ZFS_EXIT(zfsvfs); |
|
2376 |
return (0); |
|
2377 |
} |
|
2378 |
} |
|
2379 |
if (cmp < 0) { |
|
2380 |
serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); |
|
2381 |
terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); |
|
2382 |
} else { |
|
2383 |
terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); |
|
2384 |
serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); |
|
2385 |
} |
|
2386 |
||
2387 |
if (serr) { |
|
2388 |
/* |
|
2389 |
* Source entry invalid or not there. |
|
2390 |
*/ |
|
2391 |
if (!terr) { |
|
2392 |
zfs_dirent_unlock(tdl); |
|
2393 |
if (tzp) |
|
2394 |
VN_RELE(ZTOV(tzp)); |
|
2395 |
} |
|
2396 |
if (strcmp(snm, "..") == 0) |
|
2397 |
serr = EINVAL; |
|
2398 |
ZFS_EXIT(zfsvfs); |
|
2399 |
return (serr); |
|
2400 |
} |
|
2401 |
if (terr) { |
|
2402 |
zfs_dirent_unlock(sdl); |
|
2403 |
VN_RELE(ZTOV(szp)); |
|
2404 |
if (strcmp(tnm, "..") == 0) |
|
2405 |
terr = EINVAL; |
|
2406 |
ZFS_EXIT(zfsvfs); |
|
2407 |
return (terr); |
|
2408 |
} |
|
2409 |
||
2410 |
/* |
|
2411 |
* Must have write access at the source to remove the old entry |
|
2412 |
* and write access at the target to create the new entry. |
|
2413 |
* Note that if target and source are the same, this can be |
|
2414 |
* done in a single check. |
|
2415 |
*/ |
|
2416 |
||
2417 |
if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) |
|
2418 |
goto out; |
|
2419 |
||
2420 |
if (ZTOV(szp)->v_type == VDIR) { |
|
2421 |
/* |
|
2422 |
* Check to make sure rename is valid. |
|
2423 |
* Can't do a move like this: /usr/a/b to /usr/a/b/c/d |
|
2424 |
*/ |
|
2425 |
if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) |
|
2426 |
goto out; |
|
2427 |
} |
|
2428 |
||
2429 |
/* |
|
2430 |
* Does target exist? |
|
2431 |
*/ |
|
2432 |
if (tzp) { |
|
2433 |
/* |
|
2434 |
* Source and target must be the same type. |
|
2435 |
*/ |
|
2436 |
if (ZTOV(szp)->v_type == VDIR) { |
|
2437 |
if (ZTOV(tzp)->v_type != VDIR) { |
|
2438 |
error = ENOTDIR; |
|
2439 |
goto out; |
|
2440 |
} |
|
2441 |
} else { |
|
2442 |
if (ZTOV(tzp)->v_type == VDIR) { |
|
2443 |
error = EISDIR; |
|
2444 |
goto out; |
|
2445 |
} |
|
2446 |
} |
|
2447 |
/* |
|
2448 |
* POSIX dictates that when the source and target |
|
2449 |
* entries refer to the same file object, rename |
|
2450 |
* must do nothing and exit without error. |
|
2451 |
*/ |
|
2452 |
if (szp->z_id == tzp->z_id) { |
|
2453 |
error = 0; |
|
2454 |
goto out; |
|
2455 |
} |
|
2456 |
} |
|
2457 |
||
4863 | 2458 |
vnevent_rename_src(ZTOV(szp), sdvp, snm); |
789 | 2459 |
if (tzp) |
4863 | 2460 |
vnevent_rename_dest(ZTOV(tzp), tdvp, tnm); |
2461 |
||
2462 |
/* |
|
2463 |
* notify the target directory if it is not the same |
|
2464 |
* as source directory. |
|
2465 |
*/ |
|
2466 |
if (tdvp != sdvp) { |
|
2467 |
vnevent_rename_dest_dir(tdvp); |
|
2468 |
} |
|
789 | 2469 |
|
2470 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
2471 |
dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ |
|
2472 |
dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ |
|
1544 | 2473 |
dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); |
2474 |
dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); |
|
2475 |
if (sdzp != tdzp) |
|
789 | 2476 |
dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ |
1544 | 2477 |
if (tzp) |
2478 |
dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ |
|
3461 | 2479 |
dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); |
789 | 2480 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
2481 |
if (error) { |
|
2482 |
if (zl != NULL) |
|
2483 |
zfs_rename_unlock(&zl); |
|
2484 |
zfs_dirent_unlock(sdl); |
|
2485 |
zfs_dirent_unlock(tdl); |
|
2486 |
VN_RELE(ZTOV(szp)); |
|
2487 |
if (tzp) |
|
2488 |
VN_RELE(ZTOV(tzp)); |
|
2489 |
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2490 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2491 |
dmu_tx_abort(tx); |
789 | 2492 |
goto top; |
2493 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2494 |
dmu_tx_abort(tx); |
789 | 2495 |
ZFS_EXIT(zfsvfs); |
2496 |
return (error); |
|
2497 |
} |
|
2498 |
||
2499 |
if (tzp) /* Attempt to remove the existing target */ |
|
2500 |
error = zfs_link_destroy(tdl, tzp, tx, 0, NULL); |
|
2501 |
||
2502 |
if (error == 0) { |
|
2503 |
error = zfs_link_create(tdl, szp, tx, ZRENAMING); |
|
2504 |
if (error == 0) { |
|
2505 |
error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); |
|
2506 |
ASSERT(error == 0); |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
2507 |
zfs_log_rename(zilog, tx, TX_RENAME, sdzp, |
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
2508 |
sdl->dl_name, tdzp, tdl->dl_name, szp); |
789 | 2509 |
} |
2510 |
} |
|
2511 |
||
2512 |
dmu_tx_commit(tx); |
|
2513 |
out: |
|
2514 |
if (zl != NULL) |
|
2515 |
zfs_rename_unlock(&zl); |
|
2516 |
||
2517 |
zfs_dirent_unlock(sdl); |
|
2518 |
zfs_dirent_unlock(tdl); |
|
2519 |
||
2520 |
VN_RELE(ZTOV(szp)); |
|
2521 |
if (tzp) |
|
2522 |
VN_RELE(ZTOV(tzp)); |
|
2523 |
||
2524 |
ZFS_EXIT(zfsvfs); |
|
2525 |
return (error); |
|
2526 |
} |
|
2527 |
||
2528 |
/* |
|
2529 |
* Insert the indicated symbolic reference entry into the directory. |
|
2530 |
* |
|
2531 |
* IN: dvp - Directory to contain new symbolic link. |
|
2532 |
* link - Name for new symlink entry. |
|
2533 |
* vap - Attributes of new entry. |
|
2534 |
* target - Target path of new symlink. |
|
2535 |
* cr - credentials of caller. |
|
2536 |
* |
|
2537 |
* RETURN: 0 if success |
|
2538 |
* error code if failure |
|
2539 |
* |
|
2540 |
* Timestamps: |
|
2541 |
* dvp - ctime|mtime updated |
|
2542 |
*/ |
|
2543 |
static int |
|
2544 |
zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr) |
|
2545 |
{ |
|
2546 |
znode_t *zp, *dzp = VTOZ(dvp); |
|
2547 |
zfs_dirlock_t *dl; |
|
2548 |
dmu_tx_t *tx; |
|
2549 |
zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2550 |
zilog_t *zilog; |
789 | 2551 |
uint64_t zoid; |
2552 |
int len = strlen(link); |
|
2553 |
int error; |
|
2554 |
||
2555 |
ASSERT(vap->va_type == VLNK); |
|
2556 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2557 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, dzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2558 |
zilog = zfsvfs->z_log; |
789 | 2559 |
top: |
2560 |
if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { |
|
2561 |
ZFS_EXIT(zfsvfs); |
|
2562 |
return (error); |
|
2563 |
} |
|
2564 |
||
2565 |
if (len > MAXPATHLEN) { |
|
2566 |
ZFS_EXIT(zfsvfs); |
|
2567 |
return (ENAMETOOLONG); |
|
2568 |
} |
|
2569 |
||
2570 |
/* |
|
2571 |
* Attempt to lock directory; fail if entry already exists. |
|
2572 |
*/ |
|
2573 |
if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZNEW)) { |
|
2574 |
ZFS_EXIT(zfsvfs); |
|
2575 |
return (error); |
|
2576 |
} |
|
2577 |
||
2578 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
2579 |
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); |
|
2580 |
dmu_tx_hold_bonus(tx, dzp->z_id); |
|
1544 | 2581 |
dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
789 | 2582 |
if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) |
2583 |
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); |
|
2584 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
|
2585 |
if (error) { |
|
2586 |
zfs_dirent_unlock(dl); |
|
2587 |
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2588 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2589 |
dmu_tx_abort(tx); |
789 | 2590 |
goto top; |
2591 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2592 |
dmu_tx_abort(tx); |
789 | 2593 |
ZFS_EXIT(zfsvfs); |
2594 |
return (error); |
|
2595 |
} |
|
2596 |
||
2597 |
dmu_buf_will_dirty(dzp->z_dbuf, tx); |
|
2598 |
||
2599 |
/* |
|
2600 |
* Create a new object for the symlink. |
|
2601 |
* Put the link content into bonus buffer if it will fit; |
|
2602 |
* otherwise, store it just like any other file data. |
|
2603 |
*/ |
|
2604 |
zoid = 0; |
|
2605 |
if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { |
|
2606 |
zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, len); |
|
2607 |
if (len != 0) |
|
2608 |
bcopy(link, zp->z_phys + 1, len); |
|
2609 |
} else { |
|
2610 |
dmu_buf_t *dbp; |
|
1669 | 2611 |
|
789 | 2612 |
zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); |
2613 |
||
1669 | 2614 |
/* |
2615 |
* Nothing can access the znode yet so no locking needed |
|
2616 |
* for growing the znode's blocksize. |
|
2617 |
*/ |
|
2618 |
zfs_grow_blocksize(zp, len, tx); |
|
789 | 2619 |
|
1544 | 2620 |
VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, zoid, 0, FTAG, &dbp)); |
789 | 2621 |
dmu_buf_will_dirty(dbp, tx); |
2622 |
||
2623 |
ASSERT3U(len, <=, dbp->db_size); |
|
2624 |
bcopy(link, dbp->db_data, len); |
|
1544 | 2625 |
dmu_buf_rele(dbp, FTAG); |
789 | 2626 |
} |
2627 |
zp->z_phys->zp_size = len; |
|
2628 |
||
2629 |
/* |
|
2630 |
* Insert the new object into the directory. |
|
2631 |
*/ |
|
2632 |
(void) zfs_link_create(dl, zp, tx, ZNEW); |
|
2633 |
out: |
|
2634 |
if (error == 0) |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
2635 |
zfs_log_symlink(zilog, tx, TX_SYMLINK, dzp, zp, name, link); |
789 | 2636 |
|
2637 |
dmu_tx_commit(tx); |
|
2638 |
||
2639 |
zfs_dirent_unlock(dl); |
|
2640 |
||
2641 |
VN_RELE(ZTOV(zp)); |
|
2642 |
||
2643 |
ZFS_EXIT(zfsvfs); |
|
2644 |
return (error); |
|
2645 |
} |
|
2646 |
||
2647 |
/* |
|
2648 |
* Return, in the buffer contained in the provided uio structure, |
|
2649 |
* the symbolic path referred to by vp. |
|
2650 |
* |
|
2651 |
* IN: vp - vnode of symbolic link. |
|
2652 |
* uoip - structure to contain the link path. |
|
2653 |
* cr - credentials of caller. |
|
2654 |
* |
|
2655 |
* OUT: uio - structure to contain the link path. |
|
2656 |
* |
|
2657 |
* RETURN: 0 if success |
|
2658 |
* error code if failure |
|
2659 |
* |
|
2660 |
* Timestamps: |
|
2661 |
* vp - atime updated |
|
2662 |
*/ |
|
2663 |
/* ARGSUSED */ |
|
2664 |
static int |
|
2665 |
zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr) |
|
2666 |
{ |
|
2667 |
znode_t *zp = VTOZ(vp); |
|
2668 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
2669 |
size_t bufsz; |
|
2670 |
int error; |
|
2671 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2672 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 2673 |
|
2674 |
bufsz = (size_t)zp->z_phys->zp_size; |
|
2675 |
if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { |
|
2676 |
error = uiomove(zp->z_phys + 1, |
|
2677 |
MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); |
|
2678 |
} else { |
|
1544 | 2679 |
dmu_buf_t *dbp; |
2680 |
error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); |
|
2681 |
if (error) { |
|
789 | 2682 |
ZFS_EXIT(zfsvfs); |
2683 |
return (error); |
|
2684 |
} |
|
2685 |
error = uiomove(dbp->db_data, |
|
2686 |
MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); |
|
1544 | 2687 |
dmu_buf_rele(dbp, FTAG); |
789 | 2688 |
} |
2689 |
||
2690 |
ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
|
2691 |
ZFS_EXIT(zfsvfs); |
|
2692 |
return (error); |
|
2693 |
} |
|
2694 |
||
2695 |
/* |
|
2696 |
* Insert a new entry into directory tdvp referencing svp. |
|
2697 |
* |
|
2698 |
* IN: tdvp - Directory to contain new entry. |
|
2699 |
* svp - vnode of new entry. |
|
2700 |
* name - name of new entry. |
|
2701 |
* cr - credentials of caller. |
|
2702 |
* |
|
2703 |
* RETURN: 0 if success |
|
2704 |
* error code if failure |
|
2705 |
* |
|
2706 |
* Timestamps: |
|
2707 |
* tdvp - ctime|mtime updated |
|
2708 |
* svp - ctime updated |
|
2709 |
*/ |
|
2710 |
/* ARGSUSED */ |
|
2711 |
static int |
|
2712 |
zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr) |
|
2713 |
{ |
|
2714 |
znode_t *dzp = VTOZ(tdvp); |
|
2715 |
znode_t *tzp, *szp; |
|
2716 |
zfsvfs_t *zfsvfs = dzp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2717 |
zilog_t *zilog; |
789 | 2718 |
zfs_dirlock_t *dl; |
2719 |
dmu_tx_t *tx; |
|
2720 |
vnode_t *realvp; |
|
2721 |
int error; |
|
2722 |
||
2723 |
ASSERT(tdvp->v_type == VDIR); |
|
2724 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2725 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, dzp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2726 |
zilog = zfsvfs->z_log; |
789 | 2727 |
|
2728 |
if (VOP_REALVP(svp, &realvp) == 0) |
|
2729 |
svp = realvp; |
|
2730 |
||
2731 |
if (svp->v_vfsp != tdvp->v_vfsp) { |
|
2732 |
ZFS_EXIT(zfsvfs); |
|
2733 |
return (EXDEV); |
|
2734 |
} |
|
2735 |
||
2736 |
szp = VTOZ(svp); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2737 |
if (!szp->z_dbuf_held) { |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2738 |
ZFS_EXIT(zfsvfs); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2739 |
return (EIO); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2740 |
} |
789 | 2741 |
top: |
2742 |
/* |
|
2743 |
* We do not support links between attributes and non-attributes |
|
2744 |
* because of the potential security risk of creating links |
|
2745 |
* into "normal" file space in order to circumvent restrictions |
|
2746 |
* imposed in attribute space. |
|
2747 |
*/ |
|
2748 |
if ((szp->z_phys->zp_flags & ZFS_XATTR) != |
|
2749 |
(dzp->z_phys->zp_flags & ZFS_XATTR)) { |
|
2750 |
ZFS_EXIT(zfsvfs); |
|
2751 |
return (EINVAL); |
|
2752 |
} |
|
2753 |
||
2754 |
/* |
|
2755 |
* POSIX dictates that we return EPERM here. |
|
2756 |
* Better choices include ENOTSUP or EISDIR. |
|
2757 |
*/ |
|
2758 |
if (svp->v_type == VDIR) { |
|
2759 |
ZFS_EXIT(zfsvfs); |
|
2760 |
return (EPERM); |
|
2761 |
} |
|
2762 |
||
2763 |
if ((uid_t)szp->z_phys->zp_uid != crgetuid(cr) && |
|
2764 |
secpolicy_basic_link(cr) != 0) { |
|
2765 |
ZFS_EXIT(zfsvfs); |
|
2766 |
return (EPERM); |
|
2767 |
} |
|
2768 |
||
2769 |
if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { |
|
2770 |
ZFS_EXIT(zfsvfs); |
|
2771 |
return (error); |
|
2772 |
} |
|
2773 |
||
2774 |
/* |
|
2775 |
* Attempt to lock directory; fail if entry already exists. |
|
2776 |
*/ |
|
2777 |
if (error = zfs_dirent_lock(&dl, dzp, name, &tzp, ZNEW)) { |
|
2778 |
ZFS_EXIT(zfsvfs); |
|
2779 |
return (error); |
|
2780 |
} |
|
2781 |
||
2782 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
2783 |
dmu_tx_hold_bonus(tx, szp->z_id); |
|
1544 | 2784 |
dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); |
789 | 2785 |
error = dmu_tx_assign(tx, zfsvfs->z_assign); |
2786 |
if (error) { |
|
2787 |
zfs_dirent_unlock(dl); |
|
2788 |
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2789 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2790 |
dmu_tx_abort(tx); |
789 | 2791 |
goto top; |
2792 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2793 |
dmu_tx_abort(tx); |
789 | 2794 |
ZFS_EXIT(zfsvfs); |
2795 |
return (error); |
|
2796 |
} |
|
2797 |
||
2798 |
error = zfs_link_create(dl, szp, tx, 0); |
|
2799 |
||
2800 |
if (error == 0) |
|
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
2801 |
zfs_log_link(zilog, tx, TX_LINK, dzp, szp, name); |
789 | 2802 |
|
2803 |
dmu_tx_commit(tx); |
|
2804 |
||
2805 |
zfs_dirent_unlock(dl); |
|
2806 |
||
4863 | 2807 |
if (error == 0) { |
2808 |
vnevent_link(svp); |
|
2809 |
} |
|
2810 |
||
789 | 2811 |
ZFS_EXIT(zfsvfs); |
2812 |
return (error); |
|
2813 |
} |
|
2814 |
||
2815 |
/* |
|
2816 |
* zfs_null_putapage() is used when the file system has been force |
|
2817 |
* unmounted. It just drops the pages. |
|
2818 |
*/ |
|
2819 |
/* ARGSUSED */ |
|
2820 |
static int |
|
2821 |
zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, |
|
2822 |
size_t *lenp, int flags, cred_t *cr) |
|
2823 |
{ |
|
2824 |
pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); |
|
2825 |
return (0); |
|
2826 |
} |
|
2827 |
||
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2828 |
/* |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2829 |
* Push a page out to disk, klustering if possible. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2830 |
* |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2831 |
* IN: vp - file to push page to. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2832 |
* pp - page to push. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2833 |
* flags - additional flags. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2834 |
* cr - credentials of caller. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2835 |
* |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2836 |
* OUT: offp - start of range pushed. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2837 |
* lenp - len of range pushed. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2838 |
* |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2839 |
* RETURN: 0 if success |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2840 |
* error code if failure |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2841 |
* |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2842 |
* NOTE: callers must have locked the page to be pushed. On |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2843 |
* exit, the page (and all other pages in the kluster) must be |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2844 |
* unlocked. |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2845 |
*/ |
789 | 2846 |
/* ARGSUSED */ |
2847 |
static int |
|
2848 |
zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, |
|
2849 |
size_t *lenp, int flags, cred_t *cr) |
|
2850 |
{ |
|
2851 |
znode_t *zp = VTOZ(vp); |
|
2852 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
2853 |
zilog_t *zilog = zfsvfs->z_log; |
|
2854 |
dmu_tx_t *tx; |
|
1669 | 2855 |
rl_t *rl; |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2856 |
u_offset_t off, koff; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2857 |
size_t len, klen; |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2858 |
uint64_t filesz; |
789 | 2859 |
int err; |
2860 |
||
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2861 |
filesz = zp->z_phys->zp_size; |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2862 |
off = pp->p_offset; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2863 |
len = PAGESIZE; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2864 |
/* |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2865 |
* If our blocksize is bigger than the page size, try to kluster |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2866 |
* muiltiple pages so that we write a full block (thus avoiding |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2867 |
* a read-modify-write). |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2868 |
*/ |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2869 |
if (off < filesz && zp->z_blksz > PAGESIZE) { |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2870 |
if (!ISP2(zp->z_blksz)) { |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2871 |
/* Only one block in the file. */ |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2872 |
klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2873 |
koff = 0; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2874 |
} else { |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2875 |
klen = zp->z_blksz; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2876 |
koff = P2ALIGN(off, (u_offset_t)klen); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2877 |
} |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2878 |
ASSERT(koff <= filesz); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2879 |
if (koff + klen > filesz) |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2880 |
klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2881 |
pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2882 |
} |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2883 |
ASSERT3U(btop(len), ==, btopr(len)); |
789 | 2884 |
top: |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2885 |
rl = zfs_range_lock(zp, off, len, RL_WRITER); |
1819 | 2886 |
/* |
2887 |
* Can't push pages past end-of-file. |
|
2888 |
*/ |
|
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2889 |
filesz = zp->z_phys->zp_size; |
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2890 |
if (off >= filesz) { |
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2891 |
/* ignore all pages */ |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2892 |
err = 0; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2893 |
goto out; |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2894 |
} else if (off + len > filesz) { |
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2895 |
int npages = btopr(filesz - off); |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2896 |
page_t *trunc; |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2897 |
|
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2898 |
page_list_break(&pp, &trunc, npages); |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2899 |
/* ignore pages past end of file */ |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2900 |
if (trunc) |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2901 |
pvn_write_done(trunc, flags); |
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2902 |
len = filesz - off; |
1819 | 2903 |
} |
789 | 2904 |
|
2905 |
tx = dmu_tx_create(zfsvfs->z_os); |
|
2906 |
dmu_tx_hold_write(tx, zp->z_id, off, len); |
|
2907 |
dmu_tx_hold_bonus(tx, zp->z_id); |
|
2908 |
err = dmu_tx_assign(tx, zfsvfs->z_assign); |
|
2909 |
if (err != 0) { |
|
2910 |
if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { |
|
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2911 |
zfs_range_unlock(rl); |
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2912 |
dmu_tx_wait(tx); |
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2913 |
dmu_tx_abort(tx); |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2914 |
err = 0; |
789 | 2915 |
goto top; |
2916 |
} |
|
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
2917 |
dmu_tx_abort(tx); |
789 | 2918 |
goto out; |
2919 |
} |
|
2920 |
||
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2921 |
if (zp->z_blksz <= PAGESIZE) { |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2922 |
caddr_t va = ppmapin(pp, PROT_READ, (caddr_t)-1); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2923 |
ASSERT3U(len, <=, PAGESIZE); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2924 |
dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2925 |
ppmapout(va); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2926 |
} else { |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2927 |
err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2928 |
} |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2929 |
|
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2930 |
if (err == 0) { |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2931 |
zfs_time_stamper(zp, CONTENT_MODIFIED, tx); |
3638
6b28ebc717aa
6496357 spec_fsync() is useless on devices that do write caching
billm
parents:
3461
diff
changeset
|
2932 |
zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0); |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2933 |
dmu_tx_commit(tx); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2934 |
} |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2935 |
|
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
2936 |
out: |
2237 | 2937 |
zfs_range_unlock(rl); |
4709
dc10a713d1a0
6453407 rm a file when the root file system is at its quota limit reports ENOSPC
maybee
parents:
4543
diff
changeset
|
2938 |
pvn_write_done(pp, (err ? B_ERROR : 0) | flags); |
789 | 2939 |
if (offp) |
2940 |
*offp = off; |
|
2941 |
if (lenp) |
|
2942 |
*lenp = len; |
|
2943 |
||
2944 |
return (err); |
|
2945 |
} |
|
2946 |
||
2947 |
/* |
|
2948 |
* Copy the portion of the file indicated from pages into the file. |
|
2949 |
* The pages are stored in a page list attached to the files vnode. |
|
2950 |
* |
|
2951 |
* IN: vp - vnode of file to push page data to. |
|
2952 |
* off - position in file to put data. |
|
2953 |
* len - amount of data to write. |
|
2954 |
* flags - flags to control the operation. |
|
2955 |
* cr - credentials of caller. |
|
2956 |
* |
|
2957 |
* RETURN: 0 if success |
|
2958 |
* error code if failure |
|
2959 |
* |
|
2960 |
* Timestamps: |
|
2961 |
* vp - ctime|mtime updated |
|
2962 |
*/ |
|
2963 |
static int |
|
2964 |
zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr) |
|
2965 |
{ |
|
2966 |
znode_t *zp = VTOZ(vp); |
|
2967 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
2968 |
page_t *pp; |
|
2969 |
size_t io_len; |
|
2970 |
u_offset_t io_off; |
|
1669 | 2971 |
uint64_t filesz; |
789 | 2972 |
int error = 0; |
2973 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
2974 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 2975 |
|
2976 |
ASSERT(zp->z_dbuf_held && zp->z_phys); |
|
2977 |
||
2978 |
if (len == 0) { |
|
2979 |
/* |
|
2980 |
* Search the entire vp list for pages >= off. |
|
2981 |
*/ |
|
2982 |
error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, |
|
2983 |
flags, cr); |
|
1472 | 2984 |
goto out; |
789 | 2985 |
} |
2986 |
||
1669 | 2987 |
filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ |
2988 |
if (off > filesz) { |
|
789 | 2989 |
/* past end of file */ |
2990 |
ZFS_EXIT(zfsvfs); |
|
2991 |
return (0); |
|
2992 |
} |
|
2993 |
||
1669 | 2994 |
len = MIN(len, filesz - off); |
789 | 2995 |
|
1472 | 2996 |
for (io_off = off; io_off < off + len; io_off += io_len) { |
789 | 2997 |
if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { |
1669 | 2998 |
pp = page_lookup(vp, io_off, |
4339 | 2999 |
(flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); |
789 | 3000 |
} else { |
3001 |
pp = page_lookup_nowait(vp, io_off, |
|
4339 | 3002 |
(flags & B_FREE) ? SE_EXCL : SE_SHARED); |
789 | 3003 |
} |
3004 |
||
3005 |
if (pp != NULL && pvn_getdirty(pp, flags)) { |
|
3006 |
int err; |
|
3007 |
||
3008 |
/* |
|
3009 |
* Found a dirty page to push |
|
3010 |
*/ |
|
1669 | 3011 |
err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); |
3012 |
if (err) |
|
789 | 3013 |
error = err; |
3014 |
} else { |
|
3015 |
io_len = PAGESIZE; |
|
3016 |
} |
|
3017 |
} |
|
1472 | 3018 |
out: |
2638
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
3019 |
if ((flags & B_ASYNC) == 0) |
4f583dfeae92
6413510 zfs: writing to ZFS filesystem slows down fsync() on other files in the same FS
perrin
parents:
2597
diff
changeset
|
3020 |
zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); |
789 | 3021 |
ZFS_EXIT(zfsvfs); |
3022 |
return (error); |
|
3023 |
} |
|
3024 |
||
3025 |
void |
|
3026 |
zfs_inactive(vnode_t *vp, cred_t *cr) |
|
3027 |
{ |
|
3028 |
znode_t *zp = VTOZ(vp); |
|
3029 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3030 |
int error; |
|
3031 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3032 |
rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3033 |
if (zp->z_dbuf_held == 0) { |
789 | 3034 |
if (vn_has_cached_data(vp)) { |
3035 |
(void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, |
|
3036 |
B_INVAL, cr); |
|
3037 |
} |
|
3038 |
||
1544 | 3039 |
mutex_enter(&zp->z_lock); |
789 | 3040 |
vp->v_count = 0; /* count arrives as 1 */ |
1544 | 3041 |
if (zp->z_dbuf == NULL) { |
3042 |
mutex_exit(&zp->z_lock); |
|
3043 |
zfs_znode_free(zp); |
|
3044 |
} else { |
|
3045 |
mutex_exit(&zp->z_lock); |
|
3046 |
} |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3047 |
rw_exit(&zfsvfs->z_teardown_inactive_lock); |
789 | 3048 |
VFS_RELE(zfsvfs->z_vfs); |
3049 |
return; |
|
3050 |
} |
|
3051 |
||
3052 |
/* |
|
3053 |
* Attempt to push any data in the page cache. If this fails |
|
3054 |
* we will get kicked out later in zfs_zinactive(). |
|
3055 |
*/ |
|
1298 | 3056 |
if (vn_has_cached_data(vp)) { |
3057 |
(void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, |
|
3058 |
cr); |
|
3059 |
} |
|
789 | 3060 |
|
3461 | 3061 |
if (zp->z_atime_dirty && zp->z_unlinked == 0) { |
789 | 3062 |
dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); |
3063 |
||
3064 |
dmu_tx_hold_bonus(tx, zp->z_id); |
|
3065 |
error = dmu_tx_assign(tx, TXG_WAIT); |
|
3066 |
if (error) { |
|
3067 |
dmu_tx_abort(tx); |
|
3068 |
} else { |
|
3069 |
dmu_buf_will_dirty(zp->z_dbuf, tx); |
|
3070 |
mutex_enter(&zp->z_lock); |
|
3071 |
zp->z_atime_dirty = 0; |
|
3072 |
mutex_exit(&zp->z_lock); |
|
3073 |
dmu_tx_commit(tx); |
|
3074 |
} |
|
3075 |
} |
|
3076 |
||
3077 |
zfs_zinactive(zp); |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3078 |
rw_exit(&zfsvfs->z_teardown_inactive_lock); |
789 | 3079 |
} |
3080 |
||
3081 |
/* |
|
3082 |
* Bounds-check the seek operation. |
|
3083 |
* |
|
3084 |
* IN: vp - vnode seeking within |
|
3085 |
* ooff - old file offset |
|
3086 |
* noffp - pointer to new file offset |
|
3087 |
* |
|
3088 |
* RETURN: 0 if success |
|
3089 |
* EINVAL if new offset invalid |
|
3090 |
*/ |
|
3091 |
/* ARGSUSED */ |
|
3092 |
static int |
|
3093 |
zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp) |
|
3094 |
{ |
|
3095 |
if (vp->v_type == VDIR) |
|
3096 |
return (0); |
|
3097 |
return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); |
|
3098 |
} |
|
3099 |
||
3100 |
/* |
|
3101 |
* Pre-filter the generic locking function to trap attempts to place |
|
3102 |
* a mandatory lock on a memory mapped file. |
|
3103 |
*/ |
|
3104 |
static int |
|
3105 |
zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, |
|
3106 |
flk_callback_t *flk_cbp, cred_t *cr) |
|
3107 |
{ |
|
3108 |
znode_t *zp = VTOZ(vp); |
|
3109 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3110 |
int error; |
|
3111 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3112 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3113 |
|
3114 |
/* |
|
1544 | 3115 |
* We are following the UFS semantics with respect to mapcnt |
3116 |
* here: If we see that the file is mapped already, then we will |
|
3117 |
* return an error, but we don't worry about races between this |
|
3118 |
* function and zfs_map(). |
|
789 | 3119 |
*/ |
1544 | 3120 |
if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { |
789 | 3121 |
ZFS_EXIT(zfsvfs); |
3122 |
return (EAGAIN); |
|
3123 |
} |
|
3124 |
error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr); |
|
3125 |
ZFS_EXIT(zfsvfs); |
|
3126 |
return (error); |
|
3127 |
} |
|
3128 |
||
3129 |
/* |
|
3130 |
* If we can't find a page in the cache, we will create a new page |
|
3131 |
* and fill it with file data. For efficiency, we may try to fill |
|
1669 | 3132 |
* multiple pages at once (klustering). |
789 | 3133 |
*/ |
3134 |
static int |
|
3135 |
zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, |
|
3136 |
caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) |
|
3137 |
{ |
|
3138 |
znode_t *zp = VTOZ(vp); |
|
3139 |
page_t *pp, *cur_pp; |
|
3140 |
objset_t *os = zp->z_zfsvfs->z_os; |
|
3141 |
caddr_t va; |
|
3142 |
u_offset_t io_off, total; |
|
3143 |
uint64_t oid = zp->z_id; |
|
3144 |
size_t io_len; |
|
1669 | 3145 |
uint64_t filesz; |
789 | 3146 |
int err; |
3147 |
||
3148 |
/* |
|
3149 |
* If we are only asking for a single page don't bother klustering. |
|
3150 |
*/ |
|
1669 | 3151 |
filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ |
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
3152 |
if (off >= filesz) |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
3153 |
return (EFAULT); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
3154 |
if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { |
789 | 3155 |
io_off = off; |
3156 |
io_len = PAGESIZE; |
|
3157 |
pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); |
|
3158 |
} else { |
|
3159 |
/* |
|
3160 |
* Try to fill a kluster of pages (a blocks worth). |
|
3161 |
*/ |
|
3162 |
size_t klen; |
|
3163 |
u_offset_t koff; |
|
3164 |
||
3165 |
if (!ISP2(zp->z_blksz)) { |
|
3166 |
/* Only one block in the file. */ |
|
3167 |
klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); |
|
3168 |
koff = 0; |
|
3169 |
} else { |
|
3131
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3170 |
/* |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3171 |
* It would be ideal to align our offset to the |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3172 |
* blocksize but doing so has resulted in some |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3173 |
* strange application crashes. For now, we |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3174 |
* leave the offset as is and only adjust the |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3175 |
* length if we are off the end of the file. |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3176 |
*/ |
ef325e37ab22
6471359 zfs_fillpage() when faulting aligns on the range size within the file, getting the wrong large page
gw25295
parents:
3063
diff
changeset
|
3177 |
koff = off; |
789 | 3178 |
klen = plsz; |
3179 |
} |
|
1819 | 3180 |
ASSERT(koff <= filesz); |
3181 |
if (koff + klen > filesz) |
|
3182 |
klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff; |
|
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
3183 |
ASSERT3U(off, >=, koff); |
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
3184 |
ASSERT3U(off, <, koff + klen); |
789 | 3185 |
pp = pvn_read_kluster(vp, off, seg, addr, &io_off, |
4339 | 3186 |
&io_len, koff, klen, 0); |
789 | 3187 |
} |
3188 |
if (pp == NULL) { |
|
3189 |
/* |
|
3190 |
* Some other thread entered the page before us. |
|
3191 |
* Return to zfs_getpage to retry the lookup. |
|
3192 |
*/ |
|
3193 |
*pl = NULL; |
|
3194 |
return (0); |
|
3195 |
} |
|
3196 |
||
3197 |
/* |
|
3198 |
* Fill the pages in the kluster. |
|
3199 |
*/ |
|
3200 |
cur_pp = pp; |
|
3201 |
for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { |
|
2688
12e2ad22b970
6447701 ZFS hangs when iSCSI Target attempts to initialize its backing store
maybee
parents:
2638
diff
changeset
|
3202 |
ASSERT3U(io_off, ==, cur_pp->p_offset); |
789 | 3203 |
va = ppmapin(cur_pp, PROT_READ | PROT_WRITE, (caddr_t)-1); |
1544 | 3204 |
err = dmu_read(os, oid, io_off, PAGESIZE, va); |
789 | 3205 |
ppmapout(va); |
3206 |
if (err) { |
|
3207 |
/* On error, toss the entire kluster */ |
|
3208 |
pvn_read_done(pp, B_ERROR); |
|
3209 |
return (err); |
|
3210 |
} |
|
3211 |
cur_pp = cur_pp->p_next; |
|
3212 |
} |
|
3213 |
out: |
|
3214 |
/* |
|
3215 |
* Fill in the page list array from the kluster. If |
|
3216 |
* there are too many pages in the kluster, return |
|
3217 |
* as many pages as possible starting from the desired |
|
3218 |
* offset `off'. |
|
3219 |
* NOTE: the page list will always be null terminated. |
|
3220 |
*/ |
|
3221 |
pvn_plist_init(pp, pl, plsz, off, io_len, rw); |
|
3222 |
||
3223 |
return (0); |
|
3224 |
} |
|
3225 |
||
3226 |
/* |
|
3227 |
* Return pointers to the pages for the file region [off, off + len] |
|
3228 |
* in the pl array. If plsz is greater than len, this function may |
|
3229 |
* also return page pointers from before or after the specified |
|
3230 |
* region (i.e. some region [off', off' + plsz]). These additional |
|
3231 |
* pages are only returned if they are already in the cache, or were |
|
3232 |
* created as part of a klustered read. |
|
3233 |
* |
|
3234 |
* IN: vp - vnode of file to get data from. |
|
3235 |
* off - position in file to get data from. |
|
3236 |
* len - amount of data to retrieve. |
|
3237 |
* plsz - length of provided page list. |
|
3238 |
* seg - segment to obtain pages for. |
|
3239 |
* addr - virtual address of fault. |
|
3240 |
* rw - mode of created pages. |
|
3241 |
* cr - credentials of caller. |
|
3242 |
* |
|
3243 |
* OUT: protp - protection mode of created pages. |
|
3244 |
* pl - list of pages created. |
|
3245 |
* |
|
3246 |
* RETURN: 0 if success |
|
3247 |
* error code if failure |
|
3248 |
* |
|
3249 |
* Timestamps: |
|
3250 |
* vp - atime updated |
|
3251 |
*/ |
|
3252 |
/* ARGSUSED */ |
|
3253 |
static int |
|
3254 |
zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, |
|
3255 |
page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, |
|
3256 |
enum seg_rw rw, cred_t *cr) |
|
3257 |
{ |
|
3258 |
znode_t *zp = VTOZ(vp); |
|
3259 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3260 |
page_t *pp, **pl0 = pl; |
|
2752
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3261 |
int need_unlock = 0, err = 0; |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3262 |
offset_t orig_off; |
789 | 3263 |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3264 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3265 |
|
3266 |
if (protp) |
|
3267 |
*protp = PROT_ALL; |
|
3268 |
||
3269 |
ASSERT(zp->z_dbuf_held && zp->z_phys); |
|
3270 |
||
3271 |
/* no faultahead (for now) */ |
|
3272 |
if (pl == NULL) { |
|
3273 |
ZFS_EXIT(zfsvfs); |
|
3274 |
return (0); |
|
3275 |
} |
|
3276 |
||
3277 |
/* can't fault past EOF */ |
|
3278 |
if (off >= zp->z_phys->zp_size) { |
|
3279 |
ZFS_EXIT(zfsvfs); |
|
3280 |
return (EFAULT); |
|
3281 |
} |
|
2752
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3282 |
orig_off = off; |
789 | 3283 |
|
3284 |
/* |
|
3285 |
* If we already own the lock, then we must be page faulting |
|
3286 |
* in the middle of a write to this file (i.e., we are writing |
|
3287 |
* to this file using data from a mapped region of the file). |
|
3288 |
*/ |
|
2752
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3289 |
if (rw_owner(&zp->z_map_lock) != curthread) { |
789 | 3290 |
rw_enter(&zp->z_map_lock, RW_WRITER); |
3291 |
need_unlock = TRUE; |
|
3292 |
} |
|
3293 |
||
3294 |
/* |
|
3295 |
* Loop through the requested range [off, off + len] looking |
|
3296 |
* for pages. If we don't find a page, we will need to create |
|
3297 |
* a new page and fill it with data from the file. |
|
3298 |
*/ |
|
3299 |
while (len > 0) { |
|
3300 |
if (plsz < PAGESIZE) |
|
3301 |
break; |
|
3302 |
if (pp = page_lookup(vp, off, SE_SHARED)) { |
|
3303 |
*pl++ = pp; |
|
3304 |
off += PAGESIZE; |
|
3305 |
addr += PAGESIZE; |
|
3306 |
len -= PAGESIZE; |
|
3307 |
plsz -= PAGESIZE; |
|
3308 |
} else { |
|
3309 |
err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); |
|
2752
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3310 |
if (err) |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3311 |
goto out; |
789 | 3312 |
/* |
3313 |
* klustering may have changed our region |
|
3314 |
* to be block aligned. |
|
3315 |
*/ |
|
3316 |
if (((pp = *pl) != 0) && (off != pp->p_offset)) { |
|
3317 |
int delta = off - pp->p_offset; |
|
3318 |
len += delta; |
|
3319 |
off -= delta; |
|
3320 |
addr -= delta; |
|
3321 |
} |
|
3322 |
while (*pl) { |
|
3323 |
pl++; |
|
3324 |
off += PAGESIZE; |
|
3325 |
addr += PAGESIZE; |
|
3326 |
plsz -= PAGESIZE; |
|
3327 |
if (len > PAGESIZE) |
|
3328 |
len -= PAGESIZE; |
|
3329 |
else |
|
3330 |
len = 0; |
|
3331 |
} |
|
3332 |
} |
|
3333 |
} |
|
3334 |
||
3335 |
/* |
|
3336 |
* Fill out the page array with any pages already in the cache. |
|
3337 |
*/ |
|
3338 |
while (plsz > 0) { |
|
3339 |
pp = page_lookup_nowait(vp, off, SE_SHARED); |
|
3340 |
if (pp == NULL) |
|
3341 |
break; |
|
3342 |
*pl++ = pp; |
|
3343 |
off += PAGESIZE; |
|
3344 |
plsz -= PAGESIZE; |
|
3345 |
} |
|
3346 |
||
3347 |
ZFS_ACCESSTIME_STAMP(zfsvfs, zp); |
|
3348 |
out: |
|
2752
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3349 |
/* |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3350 |
* We can't grab the range lock for the page as reader which would |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3351 |
* stop truncation as this leads to deadlock. So we need to recheck |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3352 |
* the file size. |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3353 |
*/ |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3354 |
if (orig_off >= zp->z_phys->zp_size) |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3355 |
err = EFAULT; |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3356 |
if (err) { |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3357 |
/* |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3358 |
* Release any pages we have previously locked. |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3359 |
*/ |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3360 |
while (pl > pl0) |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3361 |
page_unlock(*--pl); |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3362 |
} |
2b25a96fc433
6438702 error handling in zfs_getpage() can trigger "page not locked" panic
perrin
parents:
2688
diff
changeset
|
3363 |
|
789 | 3364 |
*pl = NULL; |
3365 |
||
3366 |
if (need_unlock) |
|
3367 |
rw_exit(&zp->z_map_lock); |
|
3368 |
||
3369 |
ZFS_EXIT(zfsvfs); |
|
3370 |
return (err); |
|
3371 |
} |
|
3372 |
||
1544 | 3373 |
/* |
3374 |
* Request a memory map for a section of a file. This code interacts |
|
3375 |
* with common code and the VM system as follows: |
|
3376 |
* |
|
3377 |
* common code calls mmap(), which ends up in smmap_common() |
|
3378 |
* |
|
3379 |
* this calls VOP_MAP(), which takes you into (say) zfs |
|
3380 |
* |
|
3381 |
* zfs_map() calls as_map(), passing segvn_create() as the callback |
|
3382 |
* |
|
3383 |
* segvn_create() creates the new segment and calls VOP_ADDMAP() |
|
3384 |
* |
|
3385 |
* zfs_addmap() updates z_mapcnt |
|
3386 |
*/ |
|
789 | 3387 |
static int |
3388 |
zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, |
|
3389 |
size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) |
|
3390 |
{ |
|
3391 |
znode_t *zp = VTOZ(vp); |
|
3392 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3393 |
segvn_crargs_t vn_a; |
|
3394 |
int error; |
|
3395 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3396 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3397 |
|
3398 |
if (vp->v_flag & VNOMAP) { |
|
3399 |
ZFS_EXIT(zfsvfs); |
|
3400 |
return (ENOSYS); |
|
3401 |
} |
|
3402 |
||
3403 |
if (off < 0 || len > MAXOFFSET_T - off) { |
|
3404 |
ZFS_EXIT(zfsvfs); |
|
3405 |
return (ENXIO); |
|
3406 |
} |
|
3407 |
||
3408 |
if (vp->v_type != VREG) { |
|
3409 |
ZFS_EXIT(zfsvfs); |
|
3410 |
return (ENODEV); |
|
3411 |
} |
|
3412 |
||
3413 |
/* |
|
3414 |
* If file is locked, disallow mapping. |
|
3415 |
*/ |
|
1544 | 3416 |
if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { |
3417 |
ZFS_EXIT(zfsvfs); |
|
3418 |
return (EAGAIN); |
|
789 | 3419 |
} |
3420 |
||
3421 |
as_rangelock(as); |
|
3422 |
if ((flags & MAP_FIXED) == 0) { |
|
3423 |
map_addr(addrp, len, off, 1, flags); |
|
3424 |
if (*addrp == NULL) { |
|
3425 |
as_rangeunlock(as); |
|
3426 |
ZFS_EXIT(zfsvfs); |
|
3427 |
return (ENOMEM); |
|
3428 |
} |
|
3429 |
} else { |
|
3430 |
/* |
|
3431 |
* User specified address - blow away any previous mappings |
|
3432 |
*/ |
|
3433 |
(void) as_unmap(as, *addrp, len); |
|
3434 |
} |
|
3435 |
||
3436 |
vn_a.vp = vp; |
|
3437 |
vn_a.offset = (u_offset_t)off; |
|
3438 |
vn_a.type = flags & MAP_TYPE; |
|
3439 |
vn_a.prot = prot; |
|
3440 |
vn_a.maxprot = maxprot; |
|
3441 |
vn_a.cred = cr; |
|
3442 |
vn_a.amp = NULL; |
|
3443 |
vn_a.flags = flags & ~MAP_TYPE; |
|
1417
fa316336e215
6377034 setting physmem in /etc/system does not have desired effect on x86
kchow
parents:
1394
diff
changeset
|
3444 |
vn_a.szc = 0; |
fa316336e215
6377034 setting physmem in /etc/system does not have desired effect on x86
kchow
parents:
1394
diff
changeset
|
3445 |
vn_a.lgrp_mem_policy_flags = 0; |
789 | 3446 |
|
3447 |
error = as_map(as, *addrp, len, segvn_create, &vn_a); |
|
3448 |
||
3449 |
as_rangeunlock(as); |
|
3450 |
ZFS_EXIT(zfsvfs); |
|
3451 |
return (error); |
|
3452 |
} |
|
3453 |
||
3454 |
/* ARGSUSED */ |
|
3455 |
static int |
|
3456 |
zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, |
|
3457 |
size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) |
|
3458 |
{ |
|
1544 | 3459 |
uint64_t pages = btopr(len); |
3460 |
||
3461 |
atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); |
|
789 | 3462 |
return (0); |
3463 |
} |
|
3464 |
||
1773
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3465 |
/* |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3466 |
* The reason we push dirty pages as part of zfs_delmap() is so that we get a |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3467 |
* more accurate mtime for the associated file. Since we don't have a way of |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3468 |
* detecting when the data was actually modified, we have to resort to |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3469 |
* heuristics. If an explicit msync() is done, then we mark the mtime when the |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3470 |
* last page is pushed. The problem occurs when the msync() call is omitted, |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3471 |
* which by far the most common case: |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3472 |
* |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3473 |
* open() |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3474 |
* mmap() |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3475 |
* <modify memory> |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3476 |
* munmap() |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3477 |
* close() |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3478 |
* <time lapse> |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3479 |
* putpage() via fsflush |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3480 |
* |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3481 |
* If we wait until fsflush to come along, we can have a modification time that |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3482 |
* is some arbitrary point in the future. In order to prevent this in the |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3483 |
* common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3484 |
* torn down. |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3485 |
*/ |
789 | 3486 |
/* ARGSUSED */ |
3487 |
static int |
|
3488 |
zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, |
|
3489 |
size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr) |
|
3490 |
{ |
|
1544 | 3491 |
uint64_t pages = btopr(len); |
3492 |
||
3493 |
ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); |
|
3494 |
atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); |
|
1773
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3495 |
|
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3496 |
if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3497 |
vn_has_cached_data(vp)) |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3498 |
(void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr); |
d6e4f2855c14
6407791 bringover into ZFS results in s. files newer than extracted source
eschrock
parents:
1757
diff
changeset
|
3499 |
|
789 | 3500 |
return (0); |
3501 |
} |
|
3502 |
||
3503 |
/* |
|
3504 |
* Free or allocate space in a file. Currently, this function only |
|
3505 |
* supports the `F_FREESP' command. However, this command is somewhat |
|
3506 |
* misnamed, as its functionality includes the ability to allocate as |
|
3507 |
* well as free space. |
|
3508 |
* |
|
3509 |
* IN: vp - vnode of file to free data in. |
|
3510 |
* cmd - action to take (only F_FREESP supported). |
|
3511 |
* bfp - section of file to free/alloc. |
|
3512 |
* flag - current file open mode flags. |
|
3513 |
* offset - current file offset. |
|
3514 |
* cr - credentials of caller [UNUSED]. |
|
3515 |
* |
|
3516 |
* RETURN: 0 if success |
|
3517 |
* error code if failure |
|
3518 |
* |
|
3519 |
* Timestamps: |
|
3520 |
* vp - ctime|mtime updated |
|
3521 |
*/ |
|
3522 |
/* ARGSUSED */ |
|
3523 |
static int |
|
3524 |
zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, |
|
3525 |
offset_t offset, cred_t *cr, caller_context_t *ct) |
|
3526 |
{ |
|
3527 |
znode_t *zp = VTOZ(vp); |
|
3528 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3529 |
uint64_t off, len; |
|
3530 |
int error; |
|
3531 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3532 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3533 |
|
3534 |
top: |
|
3535 |
if (cmd != F_FREESP) { |
|
3536 |
ZFS_EXIT(zfsvfs); |
|
3537 |
return (EINVAL); |
|
3538 |
} |
|
3539 |
||
3540 |
if (error = convoff(vp, bfp, 0, offset)) { |
|
3541 |
ZFS_EXIT(zfsvfs); |
|
3542 |
return (error); |
|
3543 |
} |
|
3544 |
||
3545 |
if (bfp->l_len < 0) { |
|
3546 |
ZFS_EXIT(zfsvfs); |
|
3547 |
return (EINVAL); |
|
3548 |
} |
|
3549 |
||
3550 |
off = bfp->l_start; |
|
1669 | 3551 |
len = bfp->l_len; /* 0 means from off to end of file */ |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
3552 |
|
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
3553 |
do { |
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
3554 |
error = zfs_freesp(zp, off, len, flag, TRUE); |
2113
0510bb40c993
6430121 3-way deadlock involving tc_lock within zfs
ahrens
parents:
1941
diff
changeset
|
3555 |
/* NB: we already did dmu_tx_wait() if necessary */ |
1878
c22df0f5603f
6413573 deadlock between fsflush() and zfs_create()
maybee
parents:
1819
diff
changeset
|
3556 |
} while (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT); |
789 | 3557 |
|
3558 |
ZFS_EXIT(zfsvfs); |
|
3559 |
return (error); |
|
3560 |
} |
|
3561 |
||
3562 |
static int |
|
3563 |
zfs_fid(vnode_t *vp, fid_t *fidp) |
|
3564 |
{ |
|
3565 |
znode_t *zp = VTOZ(vp); |
|
3566 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3567 |
uint32_t gen; |
789 | 3568 |
uint64_t object = zp->z_id; |
3569 |
zfid_short_t *zfid; |
|
3570 |
int size, i; |
|
3571 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3572 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3573 |
gen = (uint32_t)zp->z_gen; |
789 | 3574 |
|
3575 |
size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; |
|
3576 |
if (fidp->fid_len < size) { |
|
3577 |
fidp->fid_len = size; |
|
1512 | 3578 |
ZFS_EXIT(zfsvfs); |
789 | 3579 |
return (ENOSPC); |
3580 |
} |
|
3581 |
||
3582 |
zfid = (zfid_short_t *)fidp; |
|
3583 |
||
3584 |
zfid->zf_len = size; |
|
3585 |
||
3586 |
for (i = 0; i < sizeof (zfid->zf_object); i++) |
|
3587 |
zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); |
|
3588 |
||
3589 |
/* Must have a non-zero generation number to distinguish from .zfs */ |
|
3590 |
if (gen == 0) |
|
3591 |
gen = 1; |
|
3592 |
for (i = 0; i < sizeof (zfid->zf_gen); i++) |
|
3593 |
zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); |
|
3594 |
||
3595 |
if (size == LONG_FID_LEN) { |
|
3596 |
uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); |
|
3597 |
zfid_long_t *zlfid; |
|
3598 |
||
3599 |
zlfid = (zfid_long_t *)fidp; |
|
3600 |
||
3601 |
for (i = 0; i < sizeof (zlfid->zf_setid); i++) |
|
3602 |
zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); |
|
3603 |
||
3604 |
/* XXX - this should be the generation number for the objset */ |
|
3605 |
for (i = 0; i < sizeof (zlfid->zf_setgen); i++) |
|
3606 |
zlfid->zf_setgen[i] = 0; |
|
3607 |
} |
|
3608 |
||
3609 |
ZFS_EXIT(zfsvfs); |
|
3610 |
return (0); |
|
3611 |
} |
|
3612 |
||
3613 |
static int |
|
3614 |
zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr) |
|
3615 |
{ |
|
3616 |
znode_t *zp, *xzp; |
|
3617 |
zfsvfs_t *zfsvfs; |
|
3618 |
zfs_dirlock_t *dl; |
|
3619 |
int error; |
|
3620 |
||
3621 |
switch (cmd) { |
|
3622 |
case _PC_LINK_MAX: |
|
3623 |
*valp = ULONG_MAX; |
|
3624 |
return (0); |
|
3625 |
||
3626 |
case _PC_FILESIZEBITS: |
|
3627 |
*valp = 64; |
|
3628 |
return (0); |
|
3629 |
||
3630 |
case _PC_XATTR_EXISTS: |
|
3631 |
zp = VTOZ(vp); |
|
3632 |
zfsvfs = zp->z_zfsvfs; |
|
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3633 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3634 |
*valp = 0; |
3635 |
error = zfs_dirent_lock(&dl, zp, "", &xzp, |
|
3636 |
ZXATTR | ZEXISTS | ZSHARED); |
|
3637 |
if (error == 0) { |
|
3638 |
zfs_dirent_unlock(dl); |
|
3639 |
if (!zfs_dirempty(xzp)) |
|
3640 |
*valp = 1; |
|
3641 |
VN_RELE(ZTOV(xzp)); |
|
3642 |
} else if (error == ENOENT) { |
|
3643 |
/* |
|
3644 |
* If there aren't extended attributes, it's the |
|
3645 |
* same as having zero of them. |
|
3646 |
*/ |
|
3647 |
error = 0; |
|
3648 |
} |
|
3649 |
ZFS_EXIT(zfsvfs); |
|
3650 |
return (error); |
|
3651 |
||
3652 |
case _PC_ACL_ENABLED: |
|
3653 |
*valp = _ACL_ACE_ENABLED; |
|
3654 |
return (0); |
|
3655 |
||
3656 |
case _PC_MIN_HOLE_SIZE: |
|
3657 |
*valp = (ulong_t)SPA_MINBLOCKSIZE; |
|
3658 |
return (0); |
|
3659 |
||
3660 |
default: |
|
3661 |
return (fs_pathconf(vp, cmd, valp, cr)); |
|
3662 |
} |
|
3663 |
} |
|
3664 |
||
3665 |
/*ARGSUSED*/ |
|
3666 |
static int |
|
3667 |
zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) |
|
3668 |
{ |
|
3669 |
znode_t *zp = VTOZ(vp); |
|
3670 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3671 |
int error; |
|
3672 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3673 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3674 |
error = zfs_getacl(zp, vsecp, cr); |
3675 |
ZFS_EXIT(zfsvfs); |
|
3676 |
||
3677 |
return (error); |
|
3678 |
} |
|
3679 |
||
3680 |
/*ARGSUSED*/ |
|
3681 |
static int |
|
3682 |
zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) |
|
3683 |
{ |
|
3684 |
znode_t *zp = VTOZ(vp); |
|
3685 |
zfsvfs_t *zfsvfs = zp->z_zfsvfs; |
|
3686 |
int error; |
|
3687 |
||
5326
6752aa2bd5bc
6425096 want online 'zfs recv' (read only and read/write)
ek110237
parents:
4863
diff
changeset
|
3688 |
ZFS_ENTER_VERIFY_ZP(zfsvfs, zp); |
789 | 3689 |
error = zfs_setacl(zp, vsecp, cr); |
3690 |
ZFS_EXIT(zfsvfs); |
|
3691 |
return (error); |
|
3692 |
} |
|
3693 |
||
3694 |
/* |
|
3695 |
* Predeclare these here so that the compiler assumes that |
|
3696 |
* this is an "old style" function declaration that does |
|
3697 |
* not include arguments => we won't get type mismatch errors |
|
3698 |
* in the initializations that follow. |
|
3699 |
*/ |
|
3700 |
static int zfs_inval(); |
|
3701 |
static int zfs_isdir(); |
|
3702 |
||
3703 |
static int |
|
3704 |
zfs_inval() |
|
3705 |
{ |
|
3706 |
return (EINVAL); |
|
3707 |
} |
|
3708 |
||
3709 |
static int |
|
3710 |
zfs_isdir() |
|
3711 |
{ |
|
3712 |
return (EISDIR); |
|
3713 |
} |
|
3714 |
/* |
|
3715 |
* Directory vnode operations template |
|
3716 |
*/ |
|
3717 |
vnodeops_t *zfs_dvnodeops; |
|
3718 |
const fs_operation_def_t zfs_dvnodeops_template[] = { |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3719 |
VOPNAME_OPEN, { .vop_open = zfs_open }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3720 |
VOPNAME_CLOSE, { .vop_close = zfs_close }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3721 |
VOPNAME_READ, { .error = zfs_isdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3722 |
VOPNAME_WRITE, { .error = zfs_isdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3723 |
VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3724 |
VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3725 |
VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3726 |
VOPNAME_ACCESS, { .vop_access = zfs_access }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3727 |
VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3728 |
VOPNAME_CREATE, { .vop_create = zfs_create }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3729 |
VOPNAME_REMOVE, { .vop_remove = zfs_remove }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3730 |
VOPNAME_LINK, { .vop_link = zfs_link }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3731 |
VOPNAME_RENAME, { .vop_rename = zfs_rename }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3732 |
VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3733 |
VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3734 |
VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3735 |
VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3736 |
VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3737 |
VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3738 |
VOPNAME_FID, { .vop_fid = zfs_fid }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3739 |
VOPNAME_SEEK, { .vop_seek = zfs_seek }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3740 |
VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3741 |
VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3742 |
VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, |
4863 | 3743 |
VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, |
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3744 |
NULL, NULL |
789 | 3745 |
}; |
3746 |
||
3747 |
/* |
|
3748 |
* Regular file vnode operations template |
|
3749 |
*/ |
|
3750 |
vnodeops_t *zfs_fvnodeops; |
|
3751 |
const fs_operation_def_t zfs_fvnodeops_template[] = { |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3752 |
VOPNAME_OPEN, { .vop_open = zfs_open }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3753 |
VOPNAME_CLOSE, { .vop_close = zfs_close }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3754 |
VOPNAME_READ, { .vop_read = zfs_read }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3755 |
VOPNAME_WRITE, { .vop_write = zfs_write }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3756 |
VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3757 |
VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3758 |
VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3759 |
VOPNAME_ACCESS, { .vop_access = zfs_access }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3760 |
VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3761 |
VOPNAME_RENAME, { .vop_rename = zfs_rename }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3762 |
VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3763 |
VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3764 |
VOPNAME_FID, { .vop_fid = zfs_fid }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3765 |
VOPNAME_SEEK, { .vop_seek = zfs_seek }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3766 |
VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3767 |
VOPNAME_SPACE, { .vop_space = zfs_space }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3768 |
VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3769 |
VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3770 |
VOPNAME_MAP, { .vop_map = zfs_map }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3771 |
VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3772 |
VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3773 |
VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3774 |
VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3775 |
VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3776 |
VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3777 |
NULL, NULL |
789 | 3778 |
}; |
3779 |
||
3780 |
/* |
|
3781 |
* Symbolic link vnode operations template |
|
3782 |
*/ |
|
3783 |
vnodeops_t *zfs_symvnodeops; |
|
3784 |
const fs_operation_def_t zfs_symvnodeops_template[] = { |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3785 |
VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3786 |
VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3787 |
VOPNAME_ACCESS, { .vop_access = zfs_access }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3788 |
VOPNAME_RENAME, { .vop_rename = zfs_rename }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3789 |
VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3790 |
VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
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3897
diff
changeset
|
3791 |
VOPNAME_FID, { .vop_fid = zfs_fid }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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3897
diff
changeset
|
3792 |
VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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3897
diff
changeset
|
3793 |
VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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3897
diff
changeset
|
3794 |
NULL, NULL |
789 | 3795 |
}; |
3796 |
||
3797 |
/* |
|
3798 |
* Extended attribute directory vnode operations template |
|
3799 |
* This template is identical to the directory vnodes |
|
3800 |
* operation template except for restricted operations: |
|
3801 |
* VOP_MKDIR() |
|
3802 |
* VOP_SYMLINK() |
|
3803 |
* Note that there are other restrictions embedded in: |
|
3804 |
* zfs_create() - restrict type to VREG |
|
3805 |
* zfs_link() - no links into/out of attribute space |
|
3806 |
* zfs_rename() - no moves into/out of attribute space |
|
3807 |
*/ |
|
3808 |
vnodeops_t *zfs_xdvnodeops; |
|
3809 |
const fs_operation_def_t zfs_xdvnodeops_template[] = { |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3810 |
VOPNAME_OPEN, { .vop_open = zfs_open }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3811 |
VOPNAME_CLOSE, { .vop_close = zfs_close }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3812 |
VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3813 |
VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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diff
changeset
|
3814 |
VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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diff
changeset
|
3815 |
VOPNAME_ACCESS, { .vop_access = zfs_access }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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3897
diff
changeset
|
3816 |
VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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diff
changeset
|
3817 |
VOPNAME_CREATE, { .vop_create = zfs_create }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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3897
diff
changeset
|
3818 |
VOPNAME_REMOVE, { .vop_remove = zfs_remove }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3819 |
VOPNAME_LINK, { .vop_link = zfs_link }, |
c788126f2a20
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diff
changeset
|
3820 |
VOPNAME_RENAME, { .vop_rename = zfs_rename }, |
c788126f2a20
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3897
diff
changeset
|
3821 |
VOPNAME_MKDIR, { .error = zfs_inval }, |
c788126f2a20
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parents:
3897
diff
changeset
|
3822 |
VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3823 |
VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3824 |
VOPNAME_SYMLINK, { .error = zfs_inval }, |
c788126f2a20
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parents:
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diff
changeset
|
3825 |
VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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diff
changeset
|
3826 |
VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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diff
changeset
|
3827 |
VOPNAME_FID, { .vop_fid = zfs_fid }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3828 |
VOPNAME_SEEK, { .vop_seek = zfs_seek }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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3897
diff
changeset
|
3829 |
VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
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diff
changeset
|
3830 |
VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
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diff
changeset
|
3831 |
VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
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parents:
3897
diff
changeset
|
3832 |
VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3833 |
NULL, NULL |
789 | 3834 |
}; |
3835 |
||
3836 |
/* |
|
3837 |
* Error vnode operations template |
|
3838 |
*/ |
|
3839 |
vnodeops_t *zfs_evnodeops; |
|
3840 |
const fs_operation_def_t zfs_evnodeops_template[] = { |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3841 |
VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3842 |
VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3897
diff
changeset
|
3843 |
NULL, NULL |
789 | 3844 |
}; |