PSARC 2007/567 zpool failmode property
6322646 ZFS should gracefully handle all devices failing (when writing)
6413847 vdev label write failure should be handled more gracefully
6417772 need nicer message on write failure
6417779 ZFS: I/O failure (write on ...) -- need to reallocate writes
6467927 Node gets into a panic loop when devices are fenced off
6565042 ZFS should gracefully handle all devices failing (when reading)
6596239 Stop issuing IOs to a vdev that is going to be removed
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_ZFS_CONTEXT_H
#define _SYS_ZFS_CONTEXT_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#define _SYS_MUTEX_H
#define _SYS_RWLOCK_H
#define _SYS_CONDVAR_H
#define _SYS_SYSTM_H
#define _SYS_DEBUG_H
#define _SYS_T_LOCK_H
#define _SYS_VNODE_H
#define _SYS_VFS_H
#define _SYS_SUNDDI_H
#define _SYS_CALLB_H
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <strings.h>
#include <synch.h>
#include <thread.h>
#include <assert.h>
#include <alloca.h>
#include <umem.h>
#include <limits.h>
#include <atomic.h>
#include <dirent.h>
#include <time.h>
#include <sys/note.h>
#include <sys/types.h>
#include <sys/cred.h>
#include <sys/sysmacros.h>
#include <sys/bitmap.h>
#include <sys/resource.h>
#include <sys/byteorder.h>
#include <sys/list.h>
#include <sys/uio.h>
#include <sys/zfs_debug.h>
#include <sys/sdt.h>
#include <sys/kstat.h>
#include <sys/sysevent/eventdefs.h>
/*
* Debugging
*/
/*
* Note that we are not using the debugging levels.
*/
#define CE_CONT 0 /* continuation */
#define CE_NOTE 1 /* notice */
#define CE_WARN 2 /* warning */
#define CE_PANIC 3 /* panic */
#define CE_IGNORE 4 /* print nothing */
/*
* ZFS debugging
*/
#ifdef ZFS_DEBUG
extern void dprintf_setup(int *argc, char **argv);
#endif /* ZFS_DEBUG */
extern void cmn_err(int, const char *, ...);
extern void vcmn_err(int, const char *, __va_list);
extern void panic(const char *, ...);
extern void vpanic(const char *, __va_list);
#define fm_panic panic
/* This definition is copied from assert.h. */
#if defined(__STDC__)
#if __STDC_VERSION__ - 0 >= 199901L
#define verify(EX) (void)((EX) || \
(__assert_c99(#EX, __FILE__, __LINE__, __func__), 0))
#else
#define verify(EX) (void)((EX) || (__assert(#EX, __FILE__, __LINE__), 0))
#endif /* __STDC_VERSION__ - 0 >= 199901L */
#else
#define verify(EX) (void)((EX) || (_assert("EX", __FILE__, __LINE__), 0))
#endif /* __STDC__ */
#define VERIFY verify
#define ASSERT assert
extern void __assert(const char *, const char *, int);
#ifdef lint
#define VERIFY3_IMPL(x, y, z, t) if (x == z) ((void)0)
#else
/* BEGIN CSTYLED */
#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
const TYPE __left = (TYPE)(LEFT); \
const TYPE __right = (TYPE)(RIGHT); \
if (!(__left OP __right)) { \
char *__buf = alloca(256); \
(void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
#LEFT, #OP, #RIGHT, \
(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
__assert(__buf, __FILE__, __LINE__); \
} \
_NOTE(CONSTCOND) } while (0)
/* END CSTYLED */
#endif /* lint */
#define VERIFY3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t)
#define VERIFY3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t)
#define VERIFY3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t)
#ifdef NDEBUG
#define ASSERT3S(x, y, z) ((void)0)
#define ASSERT3U(x, y, z) ((void)0)
#define ASSERT3P(x, y, z) ((void)0)
#else
#define ASSERT3S(x, y, z) VERIFY3S(x, y, z)
#define ASSERT3U(x, y, z) VERIFY3U(x, y, z)
#define ASSERT3P(x, y, z) VERIFY3P(x, y, z)
#endif
/*
* DTrace SDT probes have different signatures in userland than they do in
* kernel. If they're being used in kernel code, re-define them out of
* existence for their counterparts in libzpool.
*/
#ifdef DTRACE_PROBE1
#undef DTRACE_PROBE1
#define DTRACE_PROBE1(a, b, c) ((void)0)
#endif /* DTRACE_PROBE1 */
#ifdef DTRACE_PROBE2
#undef DTRACE_PROBE2
#define DTRACE_PROBE2(a, b, c, d, e) ((void)0)
#endif /* DTRACE_PROBE2 */
#ifdef DTRACE_PROBE3
#undef DTRACE_PROBE3
#define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0)
#endif /* DTRACE_PROBE3 */
#ifdef DTRACE_PROBE4
#undef DTRACE_PROBE4
#define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0)
#endif /* DTRACE_PROBE4 */
/*
* Threads
*/
#define curthread ((void *)(uintptr_t)thr_self())
typedef struct kthread kthread_t;
#define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
zk_thread_create(func, arg)
#define thread_exit() thr_exit(NULL)
extern kthread_t *zk_thread_create(void (*func)(), void *arg);
#define issig(why) (FALSE)
#define ISSIG(thr, why) (FALSE)
/*
* Mutexes
*/
typedef struct kmutex {
void *m_owner;
boolean_t initialized;
mutex_t m_lock;
} kmutex_t;
#define MUTEX_DEFAULT USYNC_THREAD
#undef MUTEX_HELD
#define MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
/*
* Argh -- we have to get cheesy here because the kernel and userland
* have different signatures for the same routine.
*/
extern int _mutex_init(mutex_t *mp, int type, void *arg);
extern int _mutex_destroy(mutex_t *mp);
#define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp))
#define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp))
extern void zmutex_init(kmutex_t *mp);
extern void zmutex_destroy(kmutex_t *mp);
extern void mutex_enter(kmutex_t *mp);
extern void mutex_exit(kmutex_t *mp);
extern int mutex_tryenter(kmutex_t *mp);
extern void *mutex_owner(kmutex_t *mp);
/*
* RW locks
*/
typedef struct krwlock {
void *rw_owner;
boolean_t initialized;
rwlock_t rw_lock;
} krwlock_t;
typedef int krw_t;
#define RW_READER 0
#define RW_WRITER 1
#define RW_DEFAULT USYNC_THREAD
#undef RW_READ_HELD
#define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock)
#undef RW_WRITE_HELD
#define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock)
extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
extern void rw_destroy(krwlock_t *rwlp);
extern void rw_enter(krwlock_t *rwlp, krw_t rw);
extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
extern int rw_tryupgrade(krwlock_t *rwlp);
extern void rw_exit(krwlock_t *rwlp);
#define rw_downgrade(rwlp) do { } while (0)
extern uid_t crgetuid(cred_t *cr);
extern gid_t crgetgid(cred_t *cr);
extern int crgetngroups(cred_t *cr);
extern gid_t *crgetgroups(cred_t *cr);
/*
* Condition variables
*/
typedef cond_t kcondvar_t;
#define CV_DEFAULT USYNC_THREAD
extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
extern void cv_destroy(kcondvar_t *cv);
extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
extern void cv_signal(kcondvar_t *cv);
extern void cv_broadcast(kcondvar_t *cv);
/*
* kstat creation, installation and deletion
*/
extern kstat_t *kstat_create(char *, int,
char *, char *, uchar_t, ulong_t, uchar_t);
extern void kstat_install(kstat_t *);
extern void kstat_delete(kstat_t *);
/*
* Kernel memory
*/
#define KM_SLEEP UMEM_NOFAIL
#define KM_NOSLEEP UMEM_DEFAULT
#define KMC_NODEBUG UMC_NODEBUG
#define kmem_alloc(_s, _f) umem_alloc(_s, _f)
#define kmem_zalloc(_s, _f) umem_zalloc(_s, _f)
#define kmem_free(_b, _s) umem_free(_b, _s)
#define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
#define kmem_cache_destroy(_c) umem_cache_destroy(_c)
#define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
#define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
#define kmem_debugging() 0
#define kmem_cache_reap_now(c)
typedef umem_cache_t kmem_cache_t;
/*
* Task queues
*/
typedef struct taskq taskq_t;
typedef uintptr_t taskqid_t;
typedef void (task_func_t)(void *);
#define TASKQ_PREPOPULATE 0x0001
#define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */
#define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */
#define TQ_SLEEP KM_SLEEP /* Can block for memory */
#define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */
#define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */
extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
extern void taskq_destroy(taskq_t *);
extern void taskq_wait(taskq_t *);
extern int taskq_member(taskq_t *, void *);
/*
* vnodes
*/
typedef struct vnode {
uint64_t v_size;
int v_fd;
char *v_path;
} vnode_t;
typedef struct vattr {
uint_t va_mask; /* bit-mask of attributes */
u_offset_t va_size; /* file size in bytes */
} vattr_t;
#define AT_TYPE 0x0001
#define AT_MODE 0x0002
#define AT_UID 0x0004
#define AT_GID 0x0008
#define AT_FSID 0x0010
#define AT_NODEID 0x0020
#define AT_NLINK 0x0040
#define AT_SIZE 0x0080
#define AT_ATIME 0x0100
#define AT_MTIME 0x0200
#define AT_CTIME 0x0400
#define AT_RDEV 0x0800
#define AT_BLKSIZE 0x1000
#define AT_NBLOCKS 0x2000
#define AT_SEQ 0x8000
#define CRCREAT 0
#define VOP_CLOSE(vp, f, c, o, cr) 0
#define VOP_PUTPAGE(vp, of, sz, fl, cr) 0
#define VOP_GETATTR(vp, vap, fl, cr) ((vap)->va_size = (vp)->v_size, 0)
#define VOP_FSYNC(vp, f, cr) fsync((vp)->v_fd)
#define VN_RELE(vp) vn_close(vp)
extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
int x2, int x3);
extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
int x2, int x3, vnode_t *vp);
extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
extern void vn_close(vnode_t *vp);
#define vn_remove(path, x1, x2) remove(path)
#define vn_rename(from, to, seg) rename((from), (to))
#define vn_is_readonly(vp) B_FALSE
extern vnode_t *rootdir;
#include <sys/file.h> /* for FREAD, FWRITE, etc */
/*
* Random stuff
*/
#define lbolt (gethrtime() >> 23)
#define lbolt64 (gethrtime() >> 23)
#define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */
extern void delay(clock_t ticks);
#define gethrestime_sec() time(NULL)
#define max_ncpus 64
#define minclsyspri 60
#define maxclsyspri 99
#define CPU_SEQID (thr_self() & (max_ncpus - 1))
#define kcred NULL
#define CRED() NULL
extern uint64_t physmem;
extern int highbit(ulong_t i);
extern int random_get_bytes(uint8_t *ptr, size_t len);
extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
extern void kernel_init(int);
extern void kernel_fini(void);
struct spa;
extern void nicenum(uint64_t num, char *buf);
extern void show_pool_stats(struct spa *);
typedef struct callb_cpr {
kmutex_t *cc_lockp;
} callb_cpr_t;
#define CALLB_CPR_INIT(cp, lockp, func, name) { \
(cp)->cc_lockp = lockp; \
}
#define CALLB_CPR_SAFE_BEGIN(cp) { \
ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
}
#define CALLB_CPR_SAFE_END(cp, lockp) { \
ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
}
#define CALLB_CPR_EXIT(cp) { \
ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
mutex_exit((cp)->cc_lockp); \
}
#define zone_dataset_visible(x, y) (1)
#define INGLOBALZONE(z) (1)
/*
* Hostname information
*/
extern char hw_serial[];
extern int ddi_strtoul(const char *str, char **nptr, int base,
unsigned long *result);
/* ZFS Boot Related stuff. */
struct _buf {
intptr_t _fd;
};
struct bootstat {
uint64_t st_size;
};
extern struct _buf *kobj_open_file(char *name);
extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
unsigned off);
extern void kobj_close_file(struct _buf *file);
extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
cred_t *cr);
extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
extern zoneid_t getzoneid(void);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ZFS_CONTEXT_H */