author | Casper H.S. Dik <Casper.Dik@Sun.COM> |
Wed, 28 Apr 2010 10:01:37 +0200 | |
changeset 12273 | 63678502e95e |
parent 12184 | 0216e4439444 |
child 12904 | c3fa1a3c3799 |
permissions | -rw-r--r-- |
0 | 1 |
/* |
2 |
* CDDL HEADER START |
|
3 |
* |
|
4 |
* The contents of this file are subject to the terms of the |
|
2170 | 5 |
* Common Development and Distribution License (the "License"). |
6 |
* You may not use this file except in compliance with the License. |
|
0 | 7 |
* |
8 |
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
|
9 |
* or http://www.opensolaris.org/os/licensing. |
|
10 |
* See the License for the specific language governing permissions |
|
11 |
* and limitations under the License. |
|
12 |
* |
|
13 |
* When distributing Covered Code, include this CDDL HEADER in each |
|
14 |
* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
|
15 |
* If applicable, add the following below this CDDL HEADER, with the |
|
16 |
* fields enclosed by brackets "[]" replaced with your own identifying |
|
17 |
* information: Portions Copyright [yyyy] [name of copyright owner] |
|
18 |
* |
|
19 |
* CDDL HEADER END |
|
20 |
*/ |
|
21 |
/* |
|
12184
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
22 |
* Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 23 |
*/ |
24 |
||
25 |
#include <sys/param.h> |
|
26 |
#include <sys/systm.h> |
|
27 |
#include <sys/errno.h> |
|
28 |
#include <sys/proc.h> |
|
29 |
#include <sys/vnode.h> |
|
30 |
#include <sys/vfs.h> |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
31 |
#include <sys/vfs_opreg.h> |
0 | 32 |
#include <sys/uio.h> |
33 |
#include <sys/cred.h> |
|
34 |
#include <sys/pathname.h> |
|
35 |
#include <sys/dirent.h> |
|
36 |
#include <sys/debug.h> |
|
37 |
#include <sys/sysmacros.h> |
|
38 |
#include <sys/tiuser.h> |
|
39 |
#include <sys/cmn_err.h> |
|
40 |
#include <sys/stat.h> |
|
41 |
#include <sys/mode.h> |
|
42 |
#include <sys/policy.h> |
|
43 |
#include <rpc/types.h> |
|
44 |
#include <rpc/auth.h> |
|
45 |
#include <rpc/clnt.h> |
|
46 |
#include <sys/fs/autofs.h> |
|
47 |
#include <rpcsvc/autofs_prot.h> |
|
48 |
#include <fs/fs_subr.h> |
|
49 |
||
50 |
/* |
|
51 |
* Vnode ops for autofs |
|
52 |
*/ |
|
5331 | 53 |
static int auto_open(vnode_t **, int, cred_t *, caller_context_t *); |
54 |
static int auto_close(vnode_t *, int, int, offset_t, cred_t *, |
|
55 |
caller_context_t *); |
|
56 |
static int auto_getattr(vnode_t *, vattr_t *, int, cred_t *, |
|
57 |
caller_context_t *); |
|
0 | 58 |
static int auto_setattr(vnode_t *, vattr_t *, int, cred_t *, |
59 |
caller_context_t *); |
|
5331 | 60 |
static int auto_access(vnode_t *, int, int, cred_t *, caller_context_t *); |
0 | 61 |
static int auto_lookup(vnode_t *, char *, vnode_t **, |
5331 | 62 |
pathname_t *, int, vnode_t *, cred_t *, caller_context_t *, int *, |
63 |
pathname_t *); |
|
0 | 64 |
static int auto_create(vnode_t *, char *, vattr_t *, vcexcl_t, |
5331 | 65 |
int, vnode_t **, cred_t *, int, caller_context_t *, vsecattr_t *); |
66 |
static int auto_remove(vnode_t *, char *, cred_t *, caller_context_t *, int); |
|
67 |
static int auto_link(vnode_t *, vnode_t *, char *, cred_t *, |
|
68 |
caller_context_t *, int); |
|
69 |
static int auto_rename(vnode_t *, char *, vnode_t *, char *, cred_t *, |
|
70 |
caller_context_t *, int); |
|
71 |
static int auto_mkdir(vnode_t *, char *, vattr_t *, vnode_t **, cred_t *, |
|
72 |
caller_context_t *, int, vsecattr_t *); |
|
73 |
static int auto_rmdir(vnode_t *, char *, vnode_t *, cred_t *, |
|
74 |
caller_context_t *, int); |
|
75 |
static int auto_readdir(vnode_t *, uio_t *, cred_t *, int *, |
|
76 |
caller_context_t *, int); |
|
77 |
static int auto_symlink(vnode_t *, char *, vattr_t *, char *, cred_t *, |
|
78 |
caller_context_t *, int); |
|
79 |
static int auto_readlink(vnode_t *, struct uio *, cred_t *, |
|
80 |
caller_context_t *); |
|
81 |
static int auto_fsync(vnode_t *, int, cred_t *, caller_context_t *); |
|
82 |
static void auto_inactive(vnode_t *, cred_t *, caller_context_t *); |
|
0 | 83 |
static int auto_rwlock(vnode_t *, int, caller_context_t *); |
84 |
static void auto_rwunlock(vnode_t *vp, int, caller_context_t *); |
|
5331 | 85 |
static int auto_seek(vnode_t *vp, offset_t, offset_t *, caller_context_t *); |
0 | 86 |
|
87 |
static int auto_trigger_mount(vnode_t *, cred_t *, vnode_t **); |
|
88 |
||
89 |
vnodeops_t *auto_vnodeops; |
|
90 |
||
91 |
const fs_operation_def_t auto_vnodeops_template[] = { |
|
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
92 |
VOPNAME_OPEN, { .vop_open = auto_open }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
93 |
VOPNAME_CLOSE, { .vop_close = auto_close }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
94 |
VOPNAME_GETATTR, { .vop_getattr = auto_getattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
95 |
VOPNAME_SETATTR, { .vop_setattr = auto_setattr }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
96 |
VOPNAME_ACCESS, { .vop_access = auto_access }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
97 |
VOPNAME_LOOKUP, { .vop_lookup = auto_lookup }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
98 |
VOPNAME_CREATE, { .vop_create = auto_create }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
99 |
VOPNAME_REMOVE, { .vop_remove = auto_remove }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
100 |
VOPNAME_LINK, { .vop_link = auto_link }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
101 |
VOPNAME_RENAME, { .vop_rename = auto_rename }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
102 |
VOPNAME_MKDIR, { .vop_mkdir = auto_mkdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
103 |
VOPNAME_RMDIR, { .vop_rmdir = auto_rmdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
104 |
VOPNAME_READDIR, { .vop_readdir = auto_readdir }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
105 |
VOPNAME_SYMLINK, { .vop_symlink = auto_symlink }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
106 |
VOPNAME_READLINK, { .vop_readlink = auto_readlink }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
107 |
VOPNAME_FSYNC, { .vop_fsync = auto_fsync }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
108 |
VOPNAME_INACTIVE, { .vop_inactive = auto_inactive }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
109 |
VOPNAME_RWLOCK, { .vop_rwlock = auto_rwlock }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
110 |
VOPNAME_RWUNLOCK, { .vop_rwunlock = auto_rwunlock }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
111 |
VOPNAME_SEEK, { .vop_seek = auto_seek }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
112 |
VOPNAME_FRLOCK, { .error = fs_error }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
113 |
VOPNAME_DISPOSE, { .error = fs_error }, |
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
114 |
VOPNAME_SHRLOCK, { .error = fs_error }, |
4863 | 115 |
VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, |
3898
c788126f2a20
PSARC/2007/124 Strong Type-Checking for VFS Operation Registration Mechanism
rsb
parents:
3391
diff
changeset
|
116 |
NULL, NULL |
0 | 117 |
}; |
118 |
||
2170 | 119 |
|
120 |
||
0 | 121 |
/* ARGSUSED */ |
122 |
static int |
|
5331 | 123 |
auto_open(vnode_t **vpp, int flag, cred_t *cred, caller_context_t *ct) |
0 | 124 |
{ |
125 |
vnode_t *newvp; |
|
126 |
int error; |
|
127 |
||
128 |
AUTOFS_DPRINT((4, "auto_open: *vpp=%p\n", (void *)*vpp)); |
|
129 |
||
130 |
error = auto_trigger_mount(*vpp, cred, &newvp); |
|
131 |
if (error) |
|
132 |
goto done; |
|
133 |
||
134 |
if (newvp != NULL) { |
|
135 |
/* |
|
136 |
* Node is now mounted on. |
|
137 |
*/ |
|
138 |
VN_RELE(*vpp); |
|
139 |
*vpp = newvp; |
|
5331 | 140 |
error = VOP_ACCESS(*vpp, VREAD, 0, cred, ct); |
0 | 141 |
if (!error) |
5331 | 142 |
error = VOP_OPEN(vpp, flag, cred, ct); |
0 | 143 |
} |
144 |
||
145 |
done: |
|
146 |
AUTOFS_DPRINT((5, "auto_open: *vpp=%p error=%d\n", (void *)*vpp, |
|
147 |
error)); |
|
148 |
return (error); |
|
149 |
} |
|
150 |
||
151 |
/* ARGSUSED */ |
|
152 |
static int |
|
5331 | 153 |
auto_close( |
154 |
vnode_t *vp, |
|
155 |
int flag, |
|
156 |
int count, |
|
157 |
offset_t offset, |
|
158 |
cred_t *cred, |
|
159 |
caller_context_t *ct) |
|
0 | 160 |
{ |
161 |
return (0); |
|
162 |
} |
|
163 |
||
164 |
static int |
|
5331 | 165 |
auto_getattr( |
166 |
vnode_t *vp, |
|
167 |
vattr_t *vap, |
|
168 |
int flags, |
|
169 |
cred_t *cred, |
|
170 |
caller_context_t *ct) |
|
0 | 171 |
{ |
172 |
fnnode_t *fnp = vntofn(vp); |
|
173 |
vnode_t *newvp; |
|
174 |
vfs_t *vfsp; |
|
175 |
int error; |
|
176 |
||
177 |
AUTOFS_DPRINT((4, "auto_getattr vp %p\n", (void *)vp)); |
|
178 |
||
5302 | 179 |
if (flags & ATTR_TRIGGER) { |
180 |
/* |
|
181 |
* Pre-trigger the mount |
|
182 |
*/ |
|
183 |
error = auto_trigger_mount(vp, cred, &newvp); |
|
184 |
if (error) |
|
185 |
return (error); |
|
186 |
||
187 |
if (newvp == NULL) |
|
188 |
goto defattr; |
|
189 |
||
190 |
if (error = vn_vfsrlock_wait(vp)) |
|
191 |
return (error); |
|
149
b1477e956aca
6268481 unprivileged user calling umount on a autofs mountpoint hangs
casper
parents:
0
diff
changeset
|
192 |
|
5302 | 193 |
vfsp = newvp->v_vfsp; |
194 |
} else { |
|
195 |
/* |
|
196 |
* Recursive auto_getattr/mount; go to the vfsp == NULL |
|
197 |
* case. |
|
198 |
*/ |
|
199 |
if (vn_vfswlock_held(vp)) |
|
200 |
goto defattr; |
|
0 | 201 |
|
5302 | 202 |
if (error = vn_vfsrlock_wait(vp)) |
203 |
return (error); |
|
204 |
||
205 |
vfsp = vn_mountedvfs(vp); |
|
206 |
} |
|
207 |
||
0 | 208 |
if (vfsp != NULL) { |
209 |
/* |
|
210 |
* Node is mounted on. |
|
211 |
*/ |
|
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
212 |
error = VFS_ROOT(vfsp, &newvp); |
0 | 213 |
vn_vfsunlock(vp); |
214 |
if (error) |
|
215 |
return (error); |
|
216 |
mutex_enter(&fnp->fn_lock); |
|
217 |
if (fnp->fn_seen == newvp && fnp->fn_thread == curthread) { |
|
218 |
/* |
|
219 |
* Recursive auto_getattr(); just release newvp and drop |
|
220 |
* into the vfsp == NULL case. |
|
221 |
*/ |
|
222 |
mutex_exit(&fnp->fn_lock); |
|
223 |
VN_RELE(newvp); |
|
224 |
} else { |
|
225 |
while (fnp->fn_thread && fnp->fn_thread != curthread) { |
|
226 |
fnp->fn_flags |= MF_ATTR_WAIT; |
|
227 |
cv_wait(&fnp->fn_cv_mount, &fnp->fn_lock); |
|
228 |
} |
|
229 |
fnp->fn_thread = curthread; |
|
230 |
fnp->fn_seen = newvp; |
|
231 |
mutex_exit(&fnp->fn_lock); |
|
5331 | 232 |
error = VOP_GETATTR(newvp, vap, flags, cred, ct); |
0 | 233 |
VN_RELE(newvp); |
234 |
mutex_enter(&fnp->fn_lock); |
|
235 |
fnp->fn_seen = 0; |
|
236 |
fnp->fn_thread = 0; |
|
237 |
if (fnp->fn_flags & MF_ATTR_WAIT) { |
|
238 |
fnp->fn_flags &= ~MF_ATTR_WAIT; |
|
239 |
cv_broadcast(&fnp->fn_cv_mount); |
|
240 |
} |
|
241 |
mutex_exit(&fnp->fn_lock); |
|
242 |
return (error); |
|
243 |
} |
|
244 |
} else { |
|
245 |
vn_vfsunlock(vp); |
|
246 |
} |
|
247 |
||
149
b1477e956aca
6268481 unprivileged user calling umount on a autofs mountpoint hangs
casper
parents:
0
diff
changeset
|
248 |
defattr: |
0 | 249 |
ASSERT(vp->v_type == VDIR || vp->v_type == VLNK); |
250 |
vap->va_uid = 0; |
|
251 |
vap->va_gid = 0; |
|
252 |
vap->va_nlink = fnp->fn_linkcnt; |
|
253 |
vap->va_nodeid = (u_longlong_t)fnp->fn_nodeid; |
|
254 |
vap->va_size = fnp->fn_size; |
|
255 |
vap->va_atime = fnp->fn_atime; |
|
256 |
vap->va_mtime = fnp->fn_mtime; |
|
257 |
vap->va_ctime = fnp->fn_ctime; |
|
258 |
vap->va_type = vp->v_type; |
|
259 |
vap->va_mode = fnp->fn_mode; |
|
260 |
vap->va_fsid = vp->v_vfsp->vfs_dev; |
|
261 |
vap->va_rdev = 0; |
|
262 |
vap->va_blksize = MAXBSIZE; |
|
263 |
vap->va_nblocks = (fsblkcnt64_t)btod(vap->va_size); |
|
264 |
vap->va_seq = 0; |
|
265 |
||
266 |
return (0); |
|
267 |
} |
|
268 |
||
269 |
/*ARGSUSED4*/ |
|
270 |
static int |
|
271 |
auto_setattr( |
|
272 |
vnode_t *vp, |
|
273 |
struct vattr *vap, |
|
274 |
int flags, |
|
275 |
cred_t *cred, |
|
276 |
caller_context_t *ct) |
|
277 |
{ |
|
278 |
vnode_t *newvp; |
|
279 |
int error; |
|
280 |
||
281 |
AUTOFS_DPRINT((4, "auto_setattr vp %p\n", (void *)vp)); |
|
282 |
||
283 |
if (error = auto_trigger_mount(vp, cred, &newvp)) |
|
284 |
goto done; |
|
285 |
||
286 |
if (newvp != NULL) { |
|
287 |
/* |
|
288 |
* Node is mounted on. |
|
289 |
*/ |
|
290 |
if (vn_is_readonly(newvp)) |
|
291 |
error = EROFS; |
|
292 |
else |
|
5331 | 293 |
error = VOP_SETATTR(newvp, vap, flags, cred, ct); |
0 | 294 |
VN_RELE(newvp); |
295 |
} else |
|
296 |
error = ENOSYS; |
|
297 |
||
298 |
done: |
|
299 |
AUTOFS_DPRINT((5, "auto_setattr: error=%d\n", error)); |
|
300 |
return (error); |
|
301 |
} |
|
302 |
||
303 |
/* ARGSUSED */ |
|
304 |
static int |
|
5331 | 305 |
auto_access( |
306 |
vnode_t *vp, |
|
307 |
int mode, |
|
308 |
int flags, |
|
309 |
cred_t *cred, |
|
310 |
caller_context_t *ct) |
|
0 | 311 |
{ |
312 |
fnnode_t *fnp = vntofn(vp); |
|
313 |
vnode_t *newvp; |
|
314 |
int error; |
|
315 |
||
316 |
AUTOFS_DPRINT((4, "auto_access: vp=%p\n", (void *)vp)); |
|
317 |
||
318 |
if (error = auto_trigger_mount(vp, cred, &newvp)) |
|
319 |
goto done; |
|
320 |
||
321 |
if (newvp != NULL) { |
|
322 |
/* |
|
323 |
* Node is mounted on. |
|
324 |
*/ |
|
5331 | 325 |
error = VOP_ACCESS(newvp, mode, 0, cred, ct); |
0 | 326 |
VN_RELE(newvp); |
327 |
} else { |
|
328 |
int shift = 0; |
|
329 |
||
330 |
/* |
|
331 |
* really interested in the autofs node, check the |
|
332 |
* access on it |
|
333 |
*/ |
|
334 |
ASSERT(error == 0); |
|
335 |
if (crgetuid(cred) != fnp->fn_uid) { |
|
336 |
shift += 3; |
|
337 |
if (groupmember(fnp->fn_gid, cred) == 0) |
|
338 |
shift += 3; |
|
339 |
} |
|
12273
63678502e95e
PSARC 2009/377 In-kernel pfexec implementation.
Casper H.S. Dik <Casper.Dik@Sun.COM>
parents:
12184
diff
changeset
|
340 |
error = secpolicy_vnode_access2(cred, vp, fnp->fn_uid, |
63678502e95e
PSARC 2009/377 In-kernel pfexec implementation.
Casper H.S. Dik <Casper.Dik@Sun.COM>
parents:
12184
diff
changeset
|
341 |
fnp->fn_mode << shift, mode); |
0 | 342 |
} |
343 |
||
344 |
done: |
|
345 |
AUTOFS_DPRINT((5, "auto_access: error=%d\n", error)); |
|
346 |
return (error); |
|
347 |
} |
|
348 |
||
349 |
static int |
|
350 |
auto_lookup( |
|
351 |
vnode_t *dvp, |
|
352 |
char *nm, |
|
353 |
vnode_t **vpp, |
|
354 |
pathname_t *pnp, |
|
355 |
int flags, |
|
356 |
vnode_t *rdir, |
|
5331 | 357 |
cred_t *cred, |
358 |
caller_context_t *ct, |
|
359 |
int *direntflags, |
|
360 |
pathname_t *realpnp) |
|
0 | 361 |
{ |
362 |
int error = 0; |
|
363 |
vnode_t *newvp = NULL; |
|
364 |
vfs_t *vfsp; |
|
365 |
fninfo_t *dfnip; |
|
366 |
fnnode_t *dfnp = NULL; |
|
367 |
fnnode_t *fnp = NULL; |
|
368 |
char *searchnm; |
|
369 |
int operation; /* either AUTOFS_LOOKUP or AUTOFS_MOUNT */ |
|
370 |
||
371 |
dfnip = vfstofni(dvp->v_vfsp); |
|
372 |
AUTOFS_DPRINT((3, "auto_lookup: dvp=%p (%s) name=%s\n", |
|
373 |
(void *)dvp, dfnip->fi_map, nm)); |
|
374 |
||
375 |
if (nm[0] == 0) { |
|
376 |
VN_HOLD(dvp); |
|
377 |
*vpp = dvp; |
|
378 |
return (0); |
|
379 |
} |
|
380 |
||
5331 | 381 |
if (error = VOP_ACCESS(dvp, VEXEC, 0, cred, ct)) |
0 | 382 |
return (error); |
383 |
||
384 |
if (nm[0] == '.' && nm[1] == 0) { |
|
385 |
VN_HOLD(dvp); |
|
386 |
*vpp = dvp; |
|
387 |
return (0); |
|
388 |
} |
|
389 |
||
390 |
if (nm[0] == '.' && nm[1] == '.' && nm[2] == 0) { |
|
391 |
fnnode_t *pdfnp; |
|
392 |
||
393 |
pdfnp = (vntofn(dvp))->fn_parent; |
|
394 |
ASSERT(pdfnp != NULL); |
|
395 |
||
396 |
/* |
|
397 |
* Since it is legitimate to have the VROOT flag set for the |
|
398 |
* subdirectories of the indirect map in autofs filesystem, |
|
399 |
* rootfnnodep is checked against fnnode of dvp instead of |
|
400 |
* just checking whether VROOT flag is set in dvp |
|
401 |
*/ |
|
402 |
||
403 |
if (pdfnp == pdfnp->fn_globals->fng_rootfnnodep) { |
|
404 |
vnode_t *vp; |
|
405 |
||
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
406 |
vfs_rlock_wait(dvp->v_vfsp); |
0 | 407 |
if (dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED) { |
408 |
vfs_unlock(dvp->v_vfsp); |
|
409 |
return (EIO); |
|
410 |
} |
|
411 |
vp = dvp->v_vfsp->vfs_vnodecovered; |
|
412 |
VN_HOLD(vp); |
|
413 |
vfs_unlock(dvp->v_vfsp); |
|
5331 | 414 |
error = VOP_LOOKUP(vp, nm, vpp, pnp, flags, rdir, cred, |
415 |
ct, direntflags, realpnp); |
|
0 | 416 |
VN_RELE(vp); |
417 |
return (error); |
|
418 |
} else { |
|
419 |
*vpp = fntovn(pdfnp); |
|
420 |
VN_HOLD(*vpp); |
|
421 |
return (0); |
|
422 |
} |
|
423 |
} |
|
424 |
||
425 |
top: |
|
426 |
dfnp = vntofn(dvp); |
|
427 |
searchnm = nm; |
|
428 |
operation = 0; |
|
429 |
||
430 |
ASSERT(vn_matchops(dvp, auto_vnodeops)); |
|
431 |
||
432 |
AUTOFS_DPRINT((3, "auto_lookup: dvp=%p dfnp=%p\n", (void *)dvp, |
|
433 |
(void *)dfnp)); |
|
434 |
||
435 |
/* |
|
436 |
* If a lookup or mount of this node is in progress, wait for it |
|
437 |
* to finish, and return whatever result it got. |
|
438 |
*/ |
|
439 |
mutex_enter(&dfnp->fn_lock); |
|
440 |
if (dfnp->fn_flags & (MF_LOOKUP | MF_INPROG)) { |
|
441 |
mutex_exit(&dfnp->fn_lock); |
|
442 |
error = auto_wait4mount(dfnp); |
|
443 |
if (error == AUTOFS_SHUTDOWN) |
|
444 |
error = ENOENT; |
|
445 |
if (error == EAGAIN) |
|
446 |
goto top; |
|
447 |
if (error) |
|
448 |
return (error); |
|
449 |
} else |
|
450 |
mutex_exit(&dfnp->fn_lock); |
|
451 |
||
452 |
||
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
453 |
error = vn_vfsrlock_wait(dvp); |
0 | 454 |
if (error) |
455 |
return (error); |
|
456 |
vfsp = vn_mountedvfs(dvp); |
|
457 |
if (vfsp != NULL) { |
|
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
458 |
error = VFS_ROOT(vfsp, &newvp); |
0 | 459 |
vn_vfsunlock(dvp); |
460 |
if (!error) { |
|
461 |
error = VOP_LOOKUP(newvp, nm, vpp, pnp, |
|
5331 | 462 |
flags, rdir, cred, ct, direntflags, realpnp); |
0 | 463 |
VN_RELE(newvp); |
464 |
} |
|
465 |
return (error); |
|
466 |
} |
|
467 |
vn_vfsunlock(dvp); |
|
468 |
||
469 |
rw_enter(&dfnp->fn_rwlock, RW_READER); |
|
470 |
error = auto_search(dfnp, nm, &fnp, cred); |
|
471 |
if (error) { |
|
472 |
if (dfnip->fi_flags & MF_DIRECT) { |
|
473 |
/* |
|
474 |
* direct map. |
|
475 |
*/ |
|
476 |
if (dfnp->fn_dirents) { |
|
477 |
/* |
|
478 |
* Mount previously triggered. |
|
479 |
* 'nm' not found |
|
480 |
*/ |
|
481 |
error = ENOENT; |
|
482 |
} else { |
|
483 |
/* |
|
484 |
* I need to contact the daemon to trigger |
|
485 |
* the mount. 'dfnp' will be the mountpoint. |
|
486 |
*/ |
|
487 |
operation = AUTOFS_MOUNT; |
|
488 |
VN_HOLD(fntovn(dfnp)); |
|
489 |
fnp = dfnp; |
|
490 |
error = 0; |
|
491 |
} |
|
492 |
} else if (dvp == dfnip->fi_rootvp) { |
|
493 |
/* |
|
494 |
* 'dfnp' is the root of the indirect AUTOFS. |
|
495 |
*/ |
|
496 |
if (rw_tryupgrade(&dfnp->fn_rwlock) == 0) { |
|
497 |
/* |
|
498 |
* Could not acquire writer lock, release |
|
499 |
* reader, and wait until available. We |
|
500 |
* need to search for 'nm' again, since we |
|
501 |
* had to release the lock before reacquiring |
|
502 |
* it. |
|
503 |
*/ |
|
504 |
rw_exit(&dfnp->fn_rwlock); |
|
505 |
rw_enter(&dfnp->fn_rwlock, RW_WRITER); |
|
506 |
error = auto_search(dfnp, nm, &fnp, cred); |
|
507 |
} |
|
508 |
||
509 |
ASSERT(RW_WRITE_HELD(&dfnp->fn_rwlock)); |
|
510 |
if (error) { |
|
511 |
/* |
|
512 |
* create node being looked-up and request |
|
513 |
* mount on it. |
|
514 |
*/ |
|
515 |
error = auto_enter(dfnp, nm, &fnp, kcred); |
|
516 |
if (!error) |
|
517 |
operation = AUTOFS_LOOKUP; |
|
518 |
} |
|
519 |
} else if ((dfnp->fn_dirents == NULL) && |
|
520 |
((dvp->v_flag & VROOT) == 0) && |
|
521 |
((fntovn(dfnp->fn_parent))->v_flag & VROOT)) { |
|
522 |
/* |
|
523 |
* dfnp is the actual 'mountpoint' of indirect map, |
|
524 |
* it is the equivalent of a direct mount, |
|
525 |
* ie, /home/'user1' |
|
526 |
*/ |
|
527 |
operation = AUTOFS_MOUNT; |
|
528 |
VN_HOLD(fntovn(dfnp)); |
|
529 |
fnp = dfnp; |
|
530 |
error = 0; |
|
531 |
searchnm = dfnp->fn_name; |
|
532 |
} |
|
533 |
} |
|
534 |
||
535 |
if (error == EAGAIN) { |
|
536 |
rw_exit(&dfnp->fn_rwlock); |
|
537 |
goto top; |
|
538 |
} |
|
539 |
if (error) { |
|
540 |
rw_exit(&dfnp->fn_rwlock); |
|
541 |
return (error); |
|
542 |
} |
|
543 |
||
544 |
/* |
|
545 |
* We now have the actual fnnode we're interested in. |
|
546 |
* The 'MF_LOOKUP' indicates another thread is currently |
|
547 |
* performing a daemon lookup of this node, therefore we |
|
548 |
* wait for its completion. |
|
549 |
* The 'MF_INPROG' indicates another thread is currently |
|
550 |
* performing a daemon mount of this node, we wait for it |
|
551 |
* to be done if we are performing a MOUNT. We don't |
|
552 |
* wait for it if we are performing a LOOKUP. |
|
553 |
* We can release the reader/writer lock as soon as we acquire |
|
554 |
* the mutex, since the state of the lock can only change by |
|
555 |
* first acquiring the mutex. |
|
556 |
*/ |
|
557 |
mutex_enter(&fnp->fn_lock); |
|
558 |
rw_exit(&dfnp->fn_rwlock); |
|
559 |
if ((fnp->fn_flags & MF_LOOKUP) || |
|
560 |
((operation == AUTOFS_MOUNT) && (fnp->fn_flags & MF_INPROG))) { |
|
561 |
mutex_exit(&fnp->fn_lock); |
|
562 |
error = auto_wait4mount(fnp); |
|
563 |
VN_RELE(fntovn(fnp)); |
|
564 |
if (error == AUTOFS_SHUTDOWN) |
|
565 |
error = ENOENT; |
|
566 |
if (error && error != EAGAIN) |
|
567 |
return (error); |
|
568 |
goto top; |
|
569 |
} |
|
570 |
||
571 |
if (operation == 0) { |
|
572 |
/* |
|
573 |
* got the fnnode, check for any errors |
|
574 |
* on the previous operation on that node. |
|
575 |
*/ |
|
576 |
error = fnp->fn_error; |
|
577 |
if ((error == EINTR) || (error == EAGAIN)) { |
|
578 |
/* |
|
579 |
* previous operation on this node was |
|
580 |
* not completed, do a lookup now. |
|
581 |
*/ |
|
582 |
operation = AUTOFS_LOOKUP; |
|
583 |
} else { |
|
584 |
/* |
|
585 |
* previous operation completed. Return |
|
586 |
* a pointer to the node only if there was |
|
587 |
* no error. |
|
588 |
*/ |
|
589 |
mutex_exit(&fnp->fn_lock); |
|
590 |
if (!error) |
|
591 |
*vpp = fntovn(fnp); |
|
592 |
else |
|
593 |
VN_RELE(fntovn(fnp)); |
|
594 |
return (error); |
|
595 |
} |
|
596 |
} |
|
597 |
||
598 |
/* |
|
599 |
* Since I got to this point, it means I'm the one |
|
600 |
* responsible for triggering the mount/look-up of this node. |
|
601 |
*/ |
|
602 |
switch (operation) { |
|
603 |
case AUTOFS_LOOKUP: |
|
604 |
AUTOFS_BLOCK_OTHERS(fnp, MF_LOOKUP); |
|
605 |
fnp->fn_error = 0; |
|
606 |
mutex_exit(&fnp->fn_lock); |
|
607 |
error = auto_lookup_aux(fnp, searchnm, cred); |
|
608 |
if (!error) { |
|
609 |
/* |
|
610 |
* Return this vnode |
|
611 |
*/ |
|
612 |
*vpp = fntovn(fnp); |
|
613 |
} else { |
|
614 |
/* |
|
615 |
* release our reference to this vnode |
|
616 |
* and return error |
|
617 |
*/ |
|
618 |
VN_RELE(fntovn(fnp)); |
|
619 |
} |
|
620 |
break; |
|
621 |
case AUTOFS_MOUNT: |
|
622 |
AUTOFS_BLOCK_OTHERS(fnp, MF_INPROG); |
|
623 |
fnp->fn_error = 0; |
|
624 |
mutex_exit(&fnp->fn_lock); |
|
625 |
/* |
|
626 |
* auto_new_mount_thread fires up a new thread which |
|
627 |
* calls automountd finishing up the work |
|
628 |
*/ |
|
629 |
auto_new_mount_thread(fnp, searchnm, cred); |
|
630 |
||
631 |
/* |
|
632 |
* At this point, we are simply another thread |
|
633 |
* waiting for the mount to complete |
|
634 |
*/ |
|
635 |
error = auto_wait4mount(fnp); |
|
636 |
if (error == AUTOFS_SHUTDOWN) |
|
637 |
error = ENOENT; |
|
638 |
||
639 |
/* |
|
640 |
* now release our reference to this vnode |
|
641 |
*/ |
|
642 |
VN_RELE(fntovn(fnp)); |
|
643 |
if (!error) |
|
644 |
goto top; |
|
645 |
break; |
|
646 |
default: |
|
2170 | 647 |
auto_log(dfnp->fn_globals->fng_verbose, |
5302 | 648 |
dfnp->fn_globals->fng_zoneid, CE_WARN, |
649 |
"auto_lookup: unknown operation %d", |
|
650 |
operation); |
|
0 | 651 |
} |
652 |
||
653 |
AUTOFS_DPRINT((5, "auto_lookup: name=%s *vpp=%p return=%d\n", |
|
654 |
nm, (void *)*vpp, error)); |
|
655 |
||
656 |
return (error); |
|
657 |
} |
|
658 |
||
659 |
static int |
|
660 |
auto_create( |
|
661 |
vnode_t *dvp, |
|
662 |
char *nm, |
|
663 |
vattr_t *va, |
|
664 |
vcexcl_t excl, |
|
665 |
int mode, |
|
666 |
vnode_t **vpp, |
|
667 |
cred_t *cred, |
|
5331 | 668 |
int flag, |
669 |
caller_context_t *ct, |
|
670 |
vsecattr_t *vsecp) |
|
0 | 671 |
{ |
672 |
vnode_t *newvp; |
|
673 |
int error; |
|
674 |
||
675 |
AUTOFS_DPRINT((4, "auto_create dvp %p nm %s\n", (void *)dvp, nm)); |
|
676 |
||
677 |
if (error = auto_trigger_mount(dvp, cred, &newvp)) |
|
678 |
goto done; |
|
679 |
||
680 |
if (newvp != NULL) { |
|
681 |
/* |
|
682 |
* Node is now mounted on. |
|
683 |
*/ |
|
684 |
if (vn_is_readonly(newvp)) |
|
685 |
error = EROFS; |
|
686 |
else |
|
687 |
error = VOP_CREATE(newvp, nm, va, excl, |
|
5331 | 688 |
mode, vpp, cred, flag, ct, vsecp); |
0 | 689 |
VN_RELE(newvp); |
690 |
} else |
|
691 |
error = ENOSYS; |
|
692 |
||
693 |
done: |
|
694 |
AUTOFS_DPRINT((5, "auto_create: error=%d\n", error)); |
|
695 |
return (error); |
|
696 |
} |
|
697 |
||
698 |
static int |
|
5331 | 699 |
auto_remove( |
700 |
vnode_t *dvp, |
|
701 |
char *nm, |
|
702 |
cred_t *cred, |
|
703 |
caller_context_t *ct, |
|
704 |
int flags) |
|
0 | 705 |
{ |
706 |
vnode_t *newvp; |
|
707 |
int error; |
|
708 |
||
709 |
AUTOFS_DPRINT((4, "auto_remove dvp %p nm %s\n", (void *)dvp, nm)); |
|
710 |
||
711 |
if (error = auto_trigger_mount(dvp, cred, &newvp)) |
|
712 |
goto done; |
|
713 |
||
714 |
if (newvp != NULL) { |
|
715 |
/* |
|
716 |
* Node is now mounted on. |
|
717 |
*/ |
|
718 |
if (vn_is_readonly(newvp)) |
|
719 |
error = EROFS; |
|
720 |
else |
|
5331 | 721 |
error = VOP_REMOVE(newvp, nm, cred, ct, flags); |
0 | 722 |
VN_RELE(newvp); |
723 |
} else |
|
724 |
error = ENOSYS; |
|
725 |
||
726 |
done: |
|
727 |
AUTOFS_DPRINT((5, "auto_remove: error=%d\n", error)); |
|
728 |
return (error); |
|
729 |
} |
|
730 |
||
731 |
static int |
|
5331 | 732 |
auto_link( |
733 |
vnode_t *tdvp, |
|
734 |
vnode_t *svp, |
|
735 |
char *nm, |
|
736 |
cred_t *cred, |
|
737 |
caller_context_t *ct, |
|
738 |
int flags) |
|
0 | 739 |
{ |
740 |
vnode_t *newvp; |
|
741 |
int error; |
|
742 |
||
743 |
AUTOFS_DPRINT((4, "auto_link tdvp %p svp %p nm %s\n", (void *)tdvp, |
|
744 |
(void *)svp, nm)); |
|
745 |
||
746 |
if (error = auto_trigger_mount(tdvp, cred, &newvp)) |
|
747 |
goto done; |
|
748 |
||
749 |
if (newvp == NULL) { |
|
750 |
/* |
|
751 |
* an autonode can not be a link to another node |
|
752 |
*/ |
|
753 |
error = ENOSYS; |
|
754 |
goto done; |
|
755 |
} |
|
756 |
||
757 |
if (vn_is_readonly(newvp)) { |
|
758 |
error = EROFS; |
|
759 |
VN_RELE(newvp); |
|
760 |
goto done; |
|
761 |
} |
|
762 |
||
763 |
if (vn_matchops(svp, auto_vnodeops)) { |
|
764 |
/* |
|
765 |
* source vp can't be an autonode |
|
766 |
*/ |
|
767 |
error = ENOSYS; |
|
768 |
VN_RELE(newvp); |
|
769 |
goto done; |
|
770 |
} |
|
771 |
||
5331 | 772 |
error = VOP_LINK(newvp, svp, nm, cred, ct, flags); |
0 | 773 |
VN_RELE(newvp); |
774 |
||
775 |
done: |
|
776 |
AUTOFS_DPRINT((5, "auto_link error=%d\n", error)); |
|
777 |
return (error); |
|
778 |
} |
|
779 |
||
780 |
static int |
|
5331 | 781 |
auto_rename( |
782 |
vnode_t *odvp, |
|
783 |
char *onm, |
|
784 |
vnode_t *ndvp, |
|
785 |
char *nnm, |
|
786 |
cred_t *cr, |
|
787 |
caller_context_t *ct, |
|
788 |
int flags) |
|
0 | 789 |
{ |
790 |
vnode_t *o_newvp, *n_newvp; |
|
791 |
int error; |
|
792 |
||
793 |
AUTOFS_DPRINT((4, "auto_rename odvp %p onm %s to ndvp %p nnm %s\n", |
|
794 |
(void *)odvp, onm, (void *)ndvp, nnm)); |
|
795 |
||
796 |
/* |
|
797 |
* we know odvp is an autonode, otherwise this function |
|
798 |
* could not have ever been called. |
|
799 |
*/ |
|
800 |
ASSERT(vn_matchops(odvp, auto_vnodeops)); |
|
801 |
||
802 |
if (error = auto_trigger_mount(odvp, cr, &o_newvp)) |
|
803 |
goto done; |
|
804 |
||
805 |
if (o_newvp == NULL) { |
|
806 |
/* |
|
807 |
* can't rename an autonode |
|
808 |
*/ |
|
809 |
error = ENOSYS; |
|
810 |
goto done; |
|
811 |
} |
|
812 |
||
813 |
if (vn_matchops(ndvp, auto_vnodeops)) { |
|
814 |
/* |
|
815 |
* directory is AUTOFS, need to trigger the |
|
816 |
* mount of the real filesystem. |
|
817 |
*/ |
|
818 |
if (error = auto_trigger_mount(ndvp, cr, &n_newvp)) { |
|
819 |
VN_RELE(o_newvp); |
|
820 |
goto done; |
|
821 |
} |
|
822 |
||
823 |
if (n_newvp == NULL) { |
|
824 |
/* |
|
825 |
* target can't be an autonode |
|
826 |
*/ |
|
827 |
error = ENOSYS; |
|
828 |
VN_RELE(o_newvp); |
|
829 |
goto done; |
|
830 |
} |
|
831 |
} else { |
|
832 |
/* |
|
833 |
* destination directory mount had been |
|
834 |
* triggered prior to the call to this function. |
|
835 |
*/ |
|
836 |
n_newvp = ndvp; |
|
837 |
} |
|
838 |
||
839 |
ASSERT(!vn_matchops(n_newvp, auto_vnodeops)); |
|
840 |
||
841 |
if (vn_is_readonly(n_newvp)) { |
|
842 |
error = EROFS; |
|
843 |
VN_RELE(o_newvp); |
|
844 |
if (n_newvp != ndvp) |
|
845 |
VN_RELE(n_newvp); |
|
846 |
goto done; |
|
847 |
} |
|
848 |
||
5331 | 849 |
error = VOP_RENAME(o_newvp, onm, n_newvp, nnm, cr, ct, flags); |
0 | 850 |
VN_RELE(o_newvp); |
851 |
if (n_newvp != ndvp) |
|
852 |
VN_RELE(n_newvp); |
|
853 |
||
854 |
done: |
|
855 |
AUTOFS_DPRINT((5, "auto_rename error=%d\n", error)); |
|
856 |
return (error); |
|
857 |
} |
|
858 |
||
859 |
static int |
|
5331 | 860 |
auto_mkdir( |
861 |
vnode_t *dvp, |
|
862 |
char *nm, |
|
863 |
vattr_t *va, |
|
864 |
vnode_t **vpp, |
|
865 |
cred_t *cred, |
|
866 |
caller_context_t *ct, |
|
867 |
int flags, |
|
868 |
vsecattr_t *vsecp) |
|
0 | 869 |
{ |
870 |
vnode_t *newvp; |
|
871 |
int error; |
|
872 |
||
873 |
AUTOFS_DPRINT((4, "auto_mkdir dvp %p nm %s\n", (void *)dvp, nm)); |
|
874 |
||
875 |
if (error = auto_trigger_mount(dvp, cred, &newvp)) |
|
876 |
goto done; |
|
877 |
||
878 |
if (newvp != NULL) { |
|
879 |
/* |
|
880 |
* Node is now mounted on. |
|
881 |
*/ |
|
882 |
if (vn_is_readonly(newvp)) |
|
883 |
error = EROFS; |
|
884 |
else |
|
5331 | 885 |
error = VOP_MKDIR(newvp, nm, va, vpp, cred, ct, |
886 |
flags, vsecp); |
|
0 | 887 |
VN_RELE(newvp); |
888 |
} else |
|
889 |
error = ENOSYS; |
|
890 |
||
891 |
done: |
|
892 |
AUTOFS_DPRINT((5, "auto_mkdir: error=%d\n", error)); |
|
893 |
return (error); |
|
894 |
} |
|
895 |
||
896 |
static int |
|
5331 | 897 |
auto_rmdir( |
898 |
vnode_t *dvp, |
|
899 |
char *nm, |
|
900 |
vnode_t *cdir, |
|
901 |
cred_t *cred, |
|
902 |
caller_context_t *ct, |
|
903 |
int flags) |
|
0 | 904 |
{ |
905 |
vnode_t *newvp; |
|
906 |
int error; |
|
907 |
||
908 |
AUTOFS_DPRINT((4, "auto_rmdir: vp=%p nm=%s\n", (void *)dvp, nm)); |
|
909 |
||
910 |
if (error = auto_trigger_mount(dvp, cred, &newvp)) |
|
911 |
goto done; |
|
912 |
||
913 |
if (newvp != NULL) { |
|
914 |
/* |
|
915 |
* Node is now mounted on. |
|
916 |
*/ |
|
917 |
if (vn_is_readonly(newvp)) |
|
918 |
error = EROFS; |
|
919 |
else |
|
5331 | 920 |
error = VOP_RMDIR(newvp, nm, cdir, cred, ct, flags); |
0 | 921 |
VN_RELE(newvp); |
922 |
} else |
|
923 |
error = ENOSYS; |
|
924 |
||
925 |
done: |
|
926 |
AUTOFS_DPRINT((5, "auto_rmdir: error=%d\n", error)); |
|
927 |
return (error); |
|
928 |
} |
|
929 |
||
930 |
static int autofs_nobrowse = 0; |
|
931 |
||
932 |
#ifdef nextdp |
|
933 |
#undef nextdp |
|
934 |
#endif |
|
935 |
#define nextdp(dp) ((struct dirent64 *)((char *)(dp) + (dp)->d_reclen)) |
|
936 |
||
5331 | 937 |
/* ARGSUSED */ |
0 | 938 |
static int |
5331 | 939 |
auto_readdir( |
940 |
vnode_t *vp, |
|
941 |
uio_t *uiop, |
|
942 |
cred_t *cred, |
|
943 |
int *eofp, |
|
944 |
caller_context_t *ct, |
|
945 |
int flags) |
|
0 | 946 |
{ |
2170 | 947 |
struct autofs_rddirargs rda; |
948 |
autofs_rddirres rd; |
|
0 | 949 |
fnnode_t *fnp = vntofn(vp); |
950 |
fnnode_t *cfnp, *nfnp; |
|
951 |
dirent64_t *dp; |
|
952 |
ulong_t offset; |
|
953 |
ulong_t outcount = 0, count = 0; |
|
954 |
size_t namelen; |
|
955 |
ulong_t alloc_count; |
|
2170 | 956 |
void *outbuf = NULL; |
0 | 957 |
fninfo_t *fnip = vfstofni(vp->v_vfsp); |
958 |
struct iovec *iovp; |
|
959 |
int error = 0; |
|
960 |
int reached_max = 0; |
|
961 |
int myeof = 0; |
|
962 |
int this_reclen; |
|
2170 | 963 |
struct autofs_globals *fngp = vntofn(fnip->fi_rootvp)->fn_globals; |
0 | 964 |
|
965 |
AUTOFS_DPRINT((4, "auto_readdir vp=%p offset=%lld\n", |
|
966 |
(void *)vp, uiop->uio_loffset)); |
|
967 |
||
968 |
if (eofp != NULL) |
|
969 |
*eofp = 0; |
|
970 |
||
2170 | 971 |
if (uiop->uio_iovcnt != 1) |
972 |
return (EINVAL); |
|
973 |
||
0 | 974 |
iovp = uiop->uio_iov; |
975 |
alloc_count = iovp->iov_len; |
|
976 |
||
977 |
gethrestime(&fnp->fn_atime); |
|
978 |
fnp->fn_ref_time = fnp->fn_atime.tv_sec; |
|
979 |
||
2170 | 980 |
dp = outbuf = kmem_zalloc(alloc_count, KM_SLEEP); |
0 | 981 |
|
982 |
/* |
|
983 |
* Held when getdents calls VOP_RWLOCK.... |
|
984 |
*/ |
|
985 |
ASSERT(RW_READ_HELD(&fnp->fn_rwlock)); |
|
986 |
if (uiop->uio_offset >= AUTOFS_DAEMONCOOKIE) { |
|
987 |
again: |
|
988 |
/* |
|
989 |
* Do readdir of daemon contents only |
|
990 |
* Drop readers lock and reacquire after reply. |
|
991 |
*/ |
|
992 |
rw_exit(&fnp->fn_rwlock); |
|
2170 | 993 |
bzero(&rd, sizeof (struct autofs_rddirres)); |
0 | 994 |
count = 0; |
995 |
rda.rda_map = fnip->fi_map; |
|
996 |
rda.rda_offset = (uint_t)uiop->uio_offset; |
|
997 |
rd.rd_rddir.rddir_entries = dp; |
|
998 |
rda.rda_count = rd.rd_rddir.rddir_size = (uint_t)alloc_count; |
|
3391
2e4fef544e31
6266812 pam_krb5 and pam_krb5_migrate localize their syslog messages
semery
parents:
2170
diff
changeset
|
999 |
rda.uid = crgetuid(cred); |
2170 | 1000 |
|
1001 |
error = auto_calldaemon(fngp->fng_zoneid, |
|
5302 | 1002 |
AUTOFS_READDIR, |
1003 |
xdr_autofs_rddirargs, |
|
1004 |
&rda, |
|
1005 |
xdr_autofs_rddirres, |
|
1006 |
(void *)&rd, |
|
1007 |
sizeof (autofs_rddirres), |
|
1008 |
TRUE); |
|
2170 | 1009 |
|
0 | 1010 |
/* |
1011 |
* reacquire previously dropped lock |
|
1012 |
*/ |
|
1013 |
rw_enter(&fnp->fn_rwlock, RW_READER); |
|
1014 |
||
2170 | 1015 |
if (!error) { |
0 | 1016 |
error = rd.rd_status; |
2170 | 1017 |
dp = rd.rd_rddir.rddir_entries; |
1018 |
} |
|
1019 |
||
0 | 1020 |
if (error) { |
1021 |
if (error == AUTOFS_SHUTDOWN) { |
|
1022 |
/* |
|
1023 |
* treat as empty directory |
|
1024 |
*/ |
|
1025 |
error = 0; |
|
1026 |
myeof = 1; |
|
1027 |
if (eofp) |
|
1028 |
*eofp = 1; |
|
1029 |
} |
|
1030 |
goto done; |
|
1031 |
} |
|
1032 |
if (rd.rd_rddir.rddir_size) { |
|
2170 | 1033 |
dirent64_t *odp = dp; /* next in output buffer */ |
1034 |
dirent64_t *cdp = dp; /* current examined entry */ |
|
0 | 1035 |
|
1036 |
/* |
|
1037 |
* Check for duplicates here |
|
1038 |
*/ |
|
1039 |
do { |
|
1040 |
this_reclen = cdp->d_reclen; |
|
2170 | 1041 |
if (auto_search(fnp, cdp->d_name, |
5302 | 1042 |
NULL, cred)) { |
0 | 1043 |
/* |
1044 |
* entry not found in kernel list, |
|
1045 |
* include it in readdir output. |
|
1046 |
* |
|
1047 |
* If we are skipping entries. then |
|
1048 |
* we need to copy this entry to the |
|
1049 |
* correct position in the buffer |
|
1050 |
* to be copied out. |
|
1051 |
*/ |
|
1052 |
if (cdp != odp) |
|
1053 |
bcopy(cdp, odp, |
|
5302 | 1054 |
(size_t)this_reclen); |
0 | 1055 |
odp = nextdp(odp); |
1056 |
outcount += this_reclen; |
|
1057 |
} else { |
|
1058 |
/* |
|
1059 |
* Entry was found in the kernel |
|
1060 |
* list. If it is the first entry |
|
1061 |
* in this buffer, then just skip it |
|
1062 |
*/ |
|
1063 |
if (odp == dp) { |
|
1064 |
dp = nextdp(dp); |
|
1065 |
odp = dp; |
|
1066 |
} |
|
1067 |
} |
|
1068 |
count += this_reclen; |
|
1069 |
cdp = (struct dirent64 *) |
|
5302 | 1070 |
((char *)cdp + this_reclen); |
0 | 1071 |
} while (count < rd.rd_rddir.rddir_size); |
1072 |
||
1073 |
if (outcount) |
|
1074 |
error = uiomove(dp, outcount, UIO_READ, uiop); |
|
1075 |
uiop->uio_offset = rd.rd_rddir.rddir_offset; |
|
1076 |
} else { |
|
1077 |
if (rd.rd_rddir.rddir_eof == 0) { |
|
1078 |
/* |
|
1079 |
* alloc_count not large enough for one |
|
1080 |
* directory entry |
|
1081 |
*/ |
|
1082 |
error = EINVAL; |
|
1083 |
} |
|
1084 |
} |
|
1085 |
if (rd.rd_rddir.rddir_eof && !error) { |
|
1086 |
myeof = 1; |
|
1087 |
if (eofp) |
|
1088 |
*eofp = 1; |
|
1089 |
} |
|
1090 |
if (!error && !myeof && outcount == 0) { |
|
1091 |
/* |
|
1092 |
* call daemon with new cookie, all previous |
|
1093 |
* elements happened to be duplicates |
|
1094 |
*/ |
|
1095 |
dp = outbuf; |
|
1096 |
goto again; |
|
1097 |
} |
|
1098 |
goto done; |
|
1099 |
} |
|
1100 |
||
1101 |
if (uiop->uio_offset == 0) { |
|
1102 |
/* |
|
1103 |
* first time: so fudge the . and .. |
|
1104 |
*/ |
|
1105 |
this_reclen = DIRENT64_RECLEN(1); |
|
1106 |
if (alloc_count < this_reclen) { |
|
1107 |
error = EINVAL; |
|
1108 |
goto done; |
|
1109 |
} |
|
1110 |
dp->d_ino = (ino64_t)fnp->fn_nodeid; |
|
1111 |
dp->d_off = (off64_t)1; |
|
1112 |
dp->d_reclen = (ushort_t)this_reclen; |
|
1113 |
||
1114 |
/* use strncpy(9f) to zero out uninitialized bytes */ |
|
1115 |
||
1116 |
(void) strncpy(dp->d_name, ".", |
|
5302 | 1117 |
DIRENT64_NAMELEN(this_reclen)); |
0 | 1118 |
outcount += dp->d_reclen; |
1119 |
dp = nextdp(dp); |
|
1120 |
||
1121 |
this_reclen = DIRENT64_RECLEN(2); |
|
1122 |
if (alloc_count < outcount + this_reclen) { |
|
1123 |
error = EINVAL; |
|
1124 |
goto done; |
|
1125 |
} |
|
1126 |
dp->d_reclen = (ushort_t)this_reclen; |
|
1127 |
dp->d_ino = (ino64_t)fnp->fn_parent->fn_nodeid; |
|
1128 |
dp->d_off = (off64_t)2; |
|
1129 |
||
1130 |
/* use strncpy(9f) to zero out uninitialized bytes */ |
|
1131 |
||
1132 |
(void) strncpy(dp->d_name, "..", |
|
5302 | 1133 |
DIRENT64_NAMELEN(this_reclen)); |
0 | 1134 |
outcount += dp->d_reclen; |
1135 |
dp = nextdp(dp); |
|
1136 |
} |
|
1137 |
||
1138 |
offset = 2; |
|
1139 |
cfnp = fnp->fn_dirents; |
|
1140 |
while (cfnp != NULL) { |
|
1141 |
nfnp = cfnp->fn_next; |
|
1142 |
offset = cfnp->fn_offset; |
|
1143 |
if ((offset >= uiop->uio_offset) && |
|
5302 | 1144 |
(!(cfnp->fn_flags & MF_LOOKUP))) { |
0 | 1145 |
int reclen; |
1146 |
||
1147 |
/* |
|
1148 |
* include node only if its offset is greater or |
|
1149 |
* equal to the one required and it is not in |
|
1150 |
* transient state (not being looked-up) |
|
1151 |
*/ |
|
1152 |
namelen = strlen(cfnp->fn_name); |
|
1153 |
reclen = (int)DIRENT64_RECLEN(namelen); |
|
1154 |
if (outcount + reclen > alloc_count) { |
|
1155 |
reached_max = 1; |
|
1156 |
break; |
|
1157 |
} |
|
1158 |
dp->d_reclen = (ushort_t)reclen; |
|
1159 |
dp->d_ino = (ino64_t)cfnp->fn_nodeid; |
|
1160 |
if (nfnp != NULL) { |
|
1161 |
/* |
|
1162 |
* get the offset of the next element |
|
1163 |
*/ |
|
1164 |
dp->d_off = (off64_t)nfnp->fn_offset; |
|
1165 |
} else { |
|
1166 |
/* |
|
1167 |
* This is the last element, make |
|
1168 |
* offset one plus the current |
|
1169 |
*/ |
|
1170 |
dp->d_off = (off64_t)cfnp->fn_offset + 1; |
|
1171 |
} |
|
1172 |
||
1173 |
/* use strncpy(9f) to zero out uninitialized bytes */ |
|
1174 |
||
1175 |
(void) strncpy(dp->d_name, cfnp->fn_name, |
|
5302 | 1176 |
DIRENT64_NAMELEN(reclen)); |
0 | 1177 |
outcount += dp->d_reclen; |
1178 |
dp = nextdp(dp); |
|
1179 |
} |
|
1180 |
cfnp = nfnp; |
|
1181 |
} |
|
1182 |
||
1183 |
if (outcount) |
|
1184 |
error = uiomove(outbuf, outcount, UIO_READ, uiop); |
|
5302 | 1185 |
|
0 | 1186 |
if (!error) { |
1187 |
if (reached_max) { |
|
1188 |
/* |
|
1189 |
* This entry did not get added to the buffer on this, |
|
1190 |
* call. We need to add it on the next call therefore |
|
1191 |
* set uio_offset to this entry's offset. If there |
|
1192 |
* wasn't enough space for one dirent, return EINVAL. |
|
1193 |
*/ |
|
1194 |
uiop->uio_offset = offset; |
|
1195 |
if (outcount == 0) |
|
1196 |
error = EINVAL; |
|
1197 |
} else if (autofs_nobrowse || |
|
5302 | 1198 |
auto_nobrowse_option(fnip->fi_opts) || |
1199 |
(fnip->fi_flags & MF_DIRECT) || |
|
1200 |
(fnp->fn_trigger != NULL) || |
|
1201 |
(((vp->v_flag & VROOT) == 0) && |
|
1202 |
((fntovn(fnp->fn_parent))->v_flag & VROOT) && |
|
1203 |
(fnp->fn_dirents == NULL))) { |
|
0 | 1204 |
/* |
1205 |
* done reading directory entries |
|
1206 |
*/ |
|
1207 |
uiop->uio_offset = offset + 1; |
|
1208 |
if (eofp) |
|
1209 |
*eofp = 1; |
|
1210 |
} else { |
|
1211 |
/* |
|
1212 |
* Need to get the rest of the entries from the daemon. |
|
1213 |
*/ |
|
1214 |
uiop->uio_offset = AUTOFS_DAEMONCOOKIE; |
|
1215 |
} |
|
1216 |
} |
|
1217 |
||
1218 |
done: |
|
1219 |
kmem_free(outbuf, alloc_count); |
|
1220 |
AUTOFS_DPRINT((5, "auto_readdir vp=%p offset=%lld eof=%d\n", |
|
5302 | 1221 |
(void *)vp, uiop->uio_loffset, myeof)); |
0 | 1222 |
return (error); |
1223 |
} |
|
1224 |
||
1225 |
static int |
|
1226 |
auto_symlink( |
|
1227 |
vnode_t *dvp, |
|
1228 |
char *lnknm, /* new entry */ |
|
1229 |
vattr_t *tva, |
|
1230 |
char *tnm, /* existing entry */ |
|
5331 | 1231 |
cred_t *cred, |
1232 |
caller_context_t *ct, |
|
1233 |
int flags) |
|
0 | 1234 |
{ |
1235 |
vnode_t *newvp; |
|
1236 |
int error; |
|
1237 |
||
1238 |
AUTOFS_DPRINT((4, "auto_symlink: dvp=%p lnknm=%s tnm=%s\n", |
|
1239 |
(void *)dvp, lnknm, tnm)); |
|
1240 |
||
1241 |
if (error = auto_trigger_mount(dvp, cred, &newvp)) |
|
1242 |
goto done; |
|
1243 |
||
1244 |
if (newvp != NULL) { |
|
1245 |
/* |
|
1246 |
* Node is mounted on. |
|
1247 |
*/ |
|
1248 |
if (vn_is_readonly(newvp)) |
|
1249 |
error = EROFS; |
|
1250 |
else |
|
5331 | 1251 |
error = VOP_SYMLINK(newvp, lnknm, tva, tnm, cred, |
1252 |
ct, flags); |
|
0 | 1253 |
VN_RELE(newvp); |
1254 |
} else |
|
1255 |
error = ENOSYS; |
|
1256 |
||
1257 |
done: |
|
1258 |
AUTOFS_DPRINT((5, "auto_symlink: error=%d\n", error)); |
|
1259 |
return (error); |
|
1260 |
} |
|
1261 |
||
1262 |
/* ARGSUSED */ |
|
1263 |
static int |
|
5331 | 1264 |
auto_readlink(vnode_t *vp, struct uio *uiop, cred_t *cr, caller_context_t *ct) |
0 | 1265 |
{ |
1266 |
fnnode_t *fnp = vntofn(vp); |
|
1267 |
int error; |
|
1268 |
timestruc_t now; |
|
1269 |
||
1270 |
AUTOFS_DPRINT((4, "auto_readlink: vp=%p\n", (void *)vp)); |
|
1271 |
||
1272 |
gethrestime(&now); |
|
1273 |
fnp->fn_ref_time = now.tv_sec; |
|
1274 |
||
1275 |
if (vp->v_type != VLNK) |
|
1276 |
error = EINVAL; |
|
1277 |
else { |
|
1278 |
ASSERT(!(fnp->fn_flags & (MF_INPROG | MF_LOOKUP))); |
|
1279 |
fnp->fn_atime = now; |
|
1280 |
error = uiomove(fnp->fn_symlink, MIN(fnp->fn_symlinklen, |
|
1281 |
uiop->uio_resid), UIO_READ, uiop); |
|
1282 |
} |
|
1283 |
||
1284 |
AUTOFS_DPRINT((5, "auto_readlink: error=%d\n", error)); |
|
1285 |
return (error); |
|
1286 |
} |
|
1287 |
||
1288 |
/* ARGSUSED */ |
|
1289 |
static int |
|
5331 | 1290 |
auto_fsync(vnode_t *cp, int syncflag, cred_t *cred, caller_context_t *ct) |
0 | 1291 |
{ |
1292 |
return (0); |
|
1293 |
} |
|
1294 |
||
1295 |
/* ARGSUSED */ |
|
1296 |
static void |
|
5331 | 1297 |
auto_inactive(vnode_t *vp, cred_t *cred, caller_context_t *ct) |
0 | 1298 |
{ |
1299 |
fnnode_t *fnp = vntofn(vp); |
|
1300 |
fnnode_t *dfnp = fnp->fn_parent; |
|
1301 |
int count; |
|
1302 |
||
1303 |
AUTOFS_DPRINT((4, "auto_inactive: vp=%p v_count=%u fn_link=%d\n", |
|
1304 |
(void *)vp, vp->v_count, fnp->fn_linkcnt)); |
|
1305 |
||
1306 |
/* |
|
1307 |
* The rwlock should not be already held by this thread. |
|
1308 |
* The assert relies on the fact that the owner field is cleared |
|
1309 |
* when the lock is released. |
|
1310 |
*/ |
|
1311 |
ASSERT(dfnp != NULL); |
|
1312 |
ASSERT(rw_owner(&dfnp->fn_rwlock) != curthread); |
|
1313 |
rw_enter(&dfnp->fn_rwlock, RW_WRITER); |
|
1314 |
mutex_enter(&vp->v_lock); |
|
1315 |
ASSERT(vp->v_count > 0); |
|
1316 |
count = --vp->v_count; |
|
1317 |
mutex_exit(&vp->v_lock); |
|
1318 |
if (count == 0) { |
|
1319 |
/* |
|
1320 |
* Free only if node has no subdirectories. |
|
1321 |
*/ |
|
1322 |
if (fnp->fn_linkcnt == 1) { |
|
1323 |
auto_disconnect(dfnp, fnp); |
|
1324 |
rw_exit(&dfnp->fn_rwlock); |
|
1325 |
auto_freefnnode(fnp); |
|
1326 |
AUTOFS_DPRINT((5, "auto_inactive: (exit) vp=%p freed\n", |
|
1327 |
(void *)vp)); |
|
1328 |
return; |
|
1329 |
} |
|
1330 |
} |
|
1331 |
rw_exit(&dfnp->fn_rwlock); |
|
1332 |
||
1333 |
AUTOFS_DPRINT((5, "auto_inactive: (exit) vp=%p v_count=%u fn_link=%d\n", |
|
1334 |
(void *)vp, vp->v_count, fnp->fn_linkcnt)); |
|
1335 |
} |
|
1336 |
||
1337 |
/* ARGSUSED2 */ |
|
1338 |
static int |
|
1339 |
auto_rwlock(vnode_t *vp, int write_lock, caller_context_t *ct) |
|
1340 |
{ |
|
1341 |
fnnode_t *fnp = vntofn(vp); |
|
1342 |
if (write_lock) |
|
1343 |
rw_enter(&fnp->fn_rwlock, RW_WRITER); |
|
1344 |
else |
|
1345 |
rw_enter(&fnp->fn_rwlock, RW_READER); |
|
1346 |
return (write_lock); |
|
1347 |
} |
|
1348 |
||
1349 |
/* ARGSUSED */ |
|
1350 |
static void |
|
1351 |
auto_rwunlock(vnode_t *vp, int write_lock, caller_context_t *ct) |
|
1352 |
{ |
|
1353 |
fnnode_t *fnp = vntofn(vp); |
|
1354 |
rw_exit(&fnp->fn_rwlock); |
|
1355 |
} |
|
1356 |
||
1357 |
||
1358 |
/* ARGSUSED */ |
|
1359 |
static int |
|
5331 | 1360 |
auto_seek( |
1361 |
struct vnode *vp, |
|
1362 |
offset_t ooff, |
|
1363 |
offset_t *noffp, |
|
1364 |
caller_context_t *ct) |
|
0 | 1365 |
{ |
1366 |
/* |
|
1367 |
* Return 0 unconditionally, since we expect |
|
1368 |
* a VDIR all the time |
|
1369 |
*/ |
|
1370 |
return (0); |
|
1371 |
} |
|
1372 |
||
1373 |
/* |
|
1374 |
* Triggers the mount if needed. If the mount has been triggered by |
|
1375 |
* another thread, it will wait for its return status, and return it. |
|
1376 |
* Whether the mount is triggered by this thread, another thread, or |
|
1377 |
* if the vnode was already covered, '*newvp' is a |
|
1378 |
* VN_HELD vnode pointing to the root of the filesystem covering 'vp'. |
|
1379 |
* If the node is not mounted on, and should not be mounted on, '*newvp' |
|
1380 |
* will be NULL. |
|
1381 |
* The calling routine may use '*newvp' to do the filesystem jump. |
|
1382 |
*/ |
|
1383 |
static int |
|
1384 |
auto_trigger_mount(vnode_t *vp, cred_t *cred, vnode_t **newvp) |
|
1385 |
{ |
|
1386 |
fnnode_t *fnp = vntofn(vp); |
|
1387 |
fninfo_t *fnip = vfstofni(vp->v_vfsp); |
|
1388 |
vnode_t *dvp; |
|
1389 |
vfs_t *vfsp; |
|
1390 |
int delayed_ind; |
|
1391 |
char name[AUTOFS_MAXPATHLEN]; |
|
1392 |
int error; |
|
1393 |
||
1394 |
AUTOFS_DPRINT((4, "auto_trigger_mount: vp=%p\n", (void *)vp)); |
|
1395 |
||
1396 |
*newvp = NULL; |
|
1397 |
||
1398 |
/* |
|
1399 |
* Cross-zone mount triggering is disallowed. |
|
1400 |
*/ |
|
1401 |
if (fnip->fi_zoneid != getzoneid()) |
|
1402 |
return (EPERM); /* Not owner of mount */ |
|
1403 |
||
1404 |
retry: |
|
1405 |
error = 0; |
|
1406 |
delayed_ind = 0; |
|
1407 |
mutex_enter(&fnp->fn_lock); |
|
1408 |
while (fnp->fn_flags & (MF_LOOKUP | MF_INPROG)) { |
|
1409 |
/* |
|
1410 |
* Mount or lookup in progress, |
|
1411 |
* wait for it before proceeding. |
|
1412 |
*/ |
|
1413 |
mutex_exit(&fnp->fn_lock); |
|
1414 |
error = auto_wait4mount(fnp); |
|
1415 |
if (error == AUTOFS_SHUTDOWN) { |
|
1416 |
error = 0; |
|
1417 |
goto done; |
|
1418 |
} |
|
1419 |
if (error && error != EAGAIN) |
|
1420 |
goto done; |
|
1421 |
error = 0; |
|
1422 |
mutex_enter(&fnp->fn_lock); |
|
1423 |
} |
|
1424 |
||
1425 |
/* |
|
1426 |
* If the vfslock can't be acquired for the first time. |
|
1427 |
* drop the fn_lock and retry next time in blocking mode. |
|
1428 |
*/ |
|
1429 |
if (vn_vfswlock(vp)) { |
|
1430 |
/* |
|
1431 |
* Lock held by another thread. |
|
1432 |
* Perform blocking by dropping the |
|
1433 |
* fn_lock. |
|
1434 |
*/ |
|
1435 |
mutex_exit(&fnp->fn_lock); |
|
1436 |
error = vn_vfswlock_wait(vp); |
|
1437 |
if (error) |
|
1438 |
goto done; |
|
1439 |
/* |
|
1440 |
* Because fn_lock wasn't held, the state |
|
1441 |
* of the trigger node might have changed. |
|
1442 |
* Need to run through the checks on trigger |
|
1443 |
* node again. |
|
1444 |
*/ |
|
1445 |
vn_vfsunlock(vp); |
|
1446 |
goto retry; |
|
1447 |
} |
|
1448 |
||
1449 |
vfsp = vn_mountedvfs(vp); |
|
1450 |
if (vfsp != NULL) { |
|
1451 |
mutex_exit(&fnp->fn_lock); |
|
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
1452 |
error = VFS_ROOT(vfsp, newvp); |
0 | 1453 |
vn_vfsunlock(vp); |
1454 |
goto done; |
|
1455 |
} else { |
|
1456 |
vn_vfsunlock(vp); |
|
1457 |
if ((fnp->fn_flags & MF_MOUNTPOINT) && |
|
1458 |
fnp->fn_trigger != NULL) { |
|
1459 |
ASSERT(fnp->fn_dirents == NULL); |
|
12184
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1460 |
mutex_exit(&fnp->fn_lock); |
0 | 1461 |
/* |
1462 |
* The filesystem that used to sit here has been |
|
12184
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1463 |
* forcibly unmounted. Do our best to recover. |
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1464 |
* Try to unmount autofs subtree below this node |
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1465 |
* and retry the action. |
0 | 1466 |
*/ |
12184
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1467 |
if (unmount_subtree(fnp, B_TRUE) != 0) { |
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1468 |
error = EIO; |
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1469 |
goto done; |
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1470 |
} |
0216e4439444
6864918 S10 auto_direct takes 45 mins to remount after manually unmounted a directory vs. S8 instantly
Jan Kryl <Jan.Kryl@Sun.COM>
parents:
5331
diff
changeset
|
1471 |
goto retry; |
0 | 1472 |
} |
1473 |
} |
|
1474 |
||
1475 |
ASSERT(vp->v_type == VDIR); |
|
1476 |
dvp = fntovn(fnp->fn_parent); |
|
1477 |
||
1478 |
if ((fnp->fn_dirents == NULL) && |
|
1479 |
((fnip->fi_flags & MF_DIRECT) == 0) && |
|
1480 |
((vp->v_flag & VROOT) == 0) && |
|
1481 |
(dvp->v_flag & VROOT)) { |
|
1482 |
/* |
|
1483 |
* If the parent of this node is the root of an indirect |
|
1484 |
* AUTOFS filesystem, this node is remountable. |
|
1485 |
*/ |
|
1486 |
delayed_ind = 1; |
|
1487 |
} |
|
1488 |
||
1489 |
if (delayed_ind || |
|
1490 |
((fnip->fi_flags & MF_DIRECT) && (fnp->fn_dirents == NULL))) { |
|
1491 |
/* |
|
1492 |
* Trigger mount since: |
|
1493 |
* direct mountpoint with no subdirs or |
|
1494 |
* delayed indirect. |
|
1495 |
*/ |
|
1496 |
AUTOFS_BLOCK_OTHERS(fnp, MF_INPROG); |
|
1497 |
fnp->fn_error = 0; |
|
1498 |
mutex_exit(&fnp->fn_lock); |
|
1499 |
if (delayed_ind) |
|
1500 |
(void) strcpy(name, fnp->fn_name); |
|
1501 |
else |
|
1502 |
(void) strcpy(name, "."); |
|
1503 |
fnp->fn_ref_time = gethrestime_sec(); |
|
1504 |
auto_new_mount_thread(fnp, name, cred); |
|
1505 |
/* |
|
1506 |
* At this point we're simply another thread waiting |
|
1507 |
* for the mount to finish. |
|
1508 |
*/ |
|
1509 |
error = auto_wait4mount(fnp); |
|
1510 |
if (error == EAGAIN) |
|
1511 |
goto retry; |
|
1512 |
if (error == AUTOFS_SHUTDOWN) { |
|
1513 |
error = 0; |
|
1514 |
goto done; |
|
1515 |
} |
|
1516 |
if (error == 0) { |
|
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
1517 |
if (error = vn_vfsrlock_wait(vp)) |
0 | 1518 |
goto done; |
1519 |
/* Reacquire after dropping locks */ |
|
1520 |
vfsp = vn_mountedvfs(vp); |
|
1521 |
if (vfsp != NULL) { |
|
1153
b0029fa0379d
4845430 heavy lookup on autofs mountpoints can introduce scalability issues.
nr123932
parents:
149
diff
changeset
|
1522 |
error = VFS_ROOT(vfsp, newvp); |
0 | 1523 |
vn_vfsunlock(vp); |
1524 |
} else { |
|
1525 |
vn_vfsunlock(vp); |
|
1526 |
goto retry; |
|
1527 |
} |
|
1528 |
} |
|
1529 |
} else |
|
1530 |
mutex_exit(&fnp->fn_lock); |
|
1531 |
||
1532 |
done: |
|
1533 |
AUTOFS_DPRINT((5, "auto_trigger_mount: error=%d\n", error)); |
|
1534 |
return (error); |
|
1535 |
} |