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ca0bf58d65
mirror_zfs/include/sys/zfs_context.h
Prakash Surya ca0bf58d65 Illumos 5497 - lock contention on arcs_mtx 
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Richard Elling <richard.elling@richardelling.com>
Approved by: Dan McDonald <danmcd@omniti.com>

Porting notes and other significant code changes:

The illumos 5368 patch (ARC should cache more metadata), which
was never picked up by ZoL, is mostly reverted by this patch.

Since ZoL relies on the kernel asynchronously calling the shrinker to
actually reap memory, the shrinker wakes up arc_reclaim_waiters_cv every
time it runs.

The arc_adapt_thread() function no longer calls arc_do_user_evicts()
since the newly-added arc_user_evicts_thread() calls it periodically.

Notable conflicting ZoL commits which conflicted with this patch or
whose effects are either duplicated or un-done by this patch:

    302f753 - Integrate ARC more tightly with Linux
    39e055c - Adjust arc_p based on "bytes" in arc_shrink
    f521ce1 - Allow "arc_p" to drop to zero or grow to "arc_c"
    77765b5 - Remove "arc_meta_used" from arc_adjust calculation
    94520ca - Prune metadata from ghost lists in arc_adjust_meta

Trace support for multilist_insert() and multilist_remove() has been
added and produces the following output:

    fio-12498 [077] .... 112936.448324: zfs_multilist__insert: ml { offset 240 numsublists 80 sublistidx 63 }
    fio-12498 [077] .... 112936.448347: zfs_multilist__remove: ml { offset 240 numsublists 80 sublistidx 29 }

The following arcstats have been removed:

    recycle_miss - Used by arcstat.py and arc_summary.py, both of which
    have been updated appropriately.

    l2_writes_hdr_miss

The following arcstats have been added:

    evict_not_enough - Number of times arc_evict_state() was unable to
    evict enough buffers to reach its target amount.

    evict_l2_skip - Number of times arc_evict_hdr() skipped eviction
    because it was being written to the l2arc.

    l2_writes_lock_retry - Replaces l2_writes_hdr_miss.  Number of times
    l2arc_write_done() failed to acquire hash_lock (and re-tries).

    arc_meta_min - Shows the value of the zfs_arc_meta_min module
    parameter (see below).

The "index" column of the "dbuf" kstat has been removed since it doesn't
have a direct analog in the new multilist scheme.  Additional multilist-
related stats could be added in the future but would likely require
extensions to the mulilist API.

The following module parameters have been added:

    zfs_arc_evict_batch_limit - Number of ARC headers to free per sub-list
    before moving on to the next sub-list.

    zfs_arc_meta_min - Enforce a floor on the amount of metadata in
    the ARC.

    zfs_arc_num_sublists_per_state - Number of multilist sub-lists per
    ARC state.

    zfs_arc_overflow_shift - Controls amount by which the ARC must exceed
    the target size to be considered "overflowing".

Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov
2015-06-11 10:27:25 -07:00

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/*
* 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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2012, Joyent, Inc. All rights reserved.
* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
*/
#ifndef _SYS_ZFS_CONTEXT_H
#define _SYS_ZFS_CONTEXT_H
#ifdef __KERNEL__
#include <sys/note.h>
#include <sys/types.h>
#include <sys/t_lock.h>
#include <sys/atomic.h>
#include <sys/sysmacros.h>
#include <sys/bitmap.h>
#include <sys/cmn_err.h>
#include <sys/kmem.h>
#include <sys/kmem_cache.h>
#include <sys/vmem.h>
#include <sys/taskq.h>
#include <sys/buf.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/cpuvar.h>
#include <sys/kobj.h>
#include <sys/conf.h>
#include <sys/disp.h>
#include <sys/debug.h>
#include <sys/random.h>
#include <sys/byteorder.h>
#include <sys/systm.h>
#include <sys/list.h>
#include <sys/uio_impl.h>
#include <sys/dirent.h>
#include <sys/time.h>
#include <vm/seg_kmem.h>
#include <sys/zone.h>
#include <sys/sdt.h>
#include <sys/zfs_debug.h>
#include <sys/zfs_delay.h>
#include <sys/fm/fs/zfs.h>
#include <sys/sunddi.h>
#include <sys/ctype.h>
#include <sys/disp.h>
#include <sys/trace.h>
#include <linux/dcache_compat.h>
#include <linux/utsname_compat.h>
#else /* _KERNEL */
#define _SYS_MUTEX_H
#define _SYS_RWLOCK_H
#define _SYS_CONDVAR_H
#define _SYS_SYSTM_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 <pthread.h>
#include <synch.h>
#include <assert.h>
#include <alloca.h>
#include <umem.h>
#include <limits.h>
#include <atomic.h>
#include <dirent.h>
#include <time.h>
#include <ctype.h>
#include <signal.h>
#include <sys/mman.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/u8_textprep.h>
#include <sys/fm/fs/zfs.h>
#include <sys/sunddi.h>
#include <sys/debug.h>
#include <sys/utsname.h>
/*
* Stack
*/
#define noinline __attribute__((noinline))
/*
* 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
*/
extern void dprintf_setup(int *argc, char **argv);
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
extern int aok;
/*
* 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_PROBE
#undef DTRACE_PROBE
#endif /* DTRACE_PROBE */
#define DTRACE_PROBE(a) \
ZFS_PROBE0(#a)
#ifdef DTRACE_PROBE1
#undef DTRACE_PROBE1
#endif /* DTRACE_PROBE1 */
#define DTRACE_PROBE1(a, b, c) \
ZFS_PROBE1(#a, (unsigned long)c)
#ifdef DTRACE_PROBE2
#undef DTRACE_PROBE2
#endif /* DTRACE_PROBE2 */
#define DTRACE_PROBE2(a, b, c, d, e) \
ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
#ifdef DTRACE_PROBE3
#undef DTRACE_PROBE3
#endif /* DTRACE_PROBE3 */
#define DTRACE_PROBE3(a, b, c, d, e, f, g) \
ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
#ifdef DTRACE_PROBE4
#undef DTRACE_PROBE4
#endif /* DTRACE_PROBE4 */
#define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
(unsigned long)i)
/*
* We use the comma operator so that this macro can be used without much
* additional code. For example, "return (EINVAL);" becomes
* "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated
* twice, so it should not have side effects (e.g. something like:
* "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
*/
#define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
/*
* Threads. TS_STACK_MIN is dictated by the minimum allowed pthread stack
* size. While TS_STACK_MAX is somewhat arbitrary, it was selected to be
* large enough for the expected stack depth while small enough to avoid
* exhausting address space with high thread counts.
*/
#define TS_MAGIC 0x72f158ab4261e538ull
#define TS_RUN 0x00000002
#define TS_STACK_MIN PTHREAD_STACK_MIN
#define TS_STACK_MAX (256 * 1024)
/* in libzpool, p0 exists only to have its address taken */
typedef struct proc {
uintptr_t this_is_never_used_dont_dereference_it;
} proc_t;
extern struct proc p0;
#define curproc (&p0)
typedef void (*thread_func_t)(void *);
typedef void (*thread_func_arg_t)(void *);
typedef pthread_t kt_did_t;
#define kpreempt(x) ((void)0)
typedef struct kthread {
kt_did_t t_tid;
thread_func_t t_func;
void * t_arg;
} kthread_t;
#define curthread zk_thread_current()
#define getcomm() "unknown"
#define thread_exit zk_thread_exit
#define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
zk_thread_create(stk, stksize, (thread_func_t)func, arg, \
len, NULL, state, pri, PTHREAD_CREATE_DETACHED)
#define thread_join(t) zk_thread_join(t)
#define newproc(f, a, cid, pri, ctp, pid) (ENOSYS)
extern kthread_t *zk_thread_current(void);
extern void zk_thread_exit(void);
extern kthread_t *zk_thread_create(caddr_t stk, size_t stksize,
thread_func_t func, void *arg, size_t len,
proc_t *pp, int state, pri_t pri, int detachstate);
extern void zk_thread_join(kt_did_t tid);
#define kpreempt_disable() ((void)0)
#define kpreempt_enable() ((void)0)
#define PS_NONE -1
#define issig(why) (FALSE)
#define ISSIG(thr, why) (FALSE)
/*
* Mutexes
*/
#define MTX_MAGIC 0x9522f51362a6e326ull
#define MTX_INIT ((void *)NULL)
#define MTX_DEST ((void *)-1UL)
typedef struct kmutex {
void *m_owner;
uint64_t m_magic;
pthread_mutex_t m_lock;
} kmutex_t;
#define MUTEX_DEFAULT 0
#define MUTEX_HELD(m) ((m)->m_owner == curthread)
#define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
extern void mutex_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);
extern int mutex_held(kmutex_t *mp);
/*
* RW locks
*/
#define RW_MAGIC 0x4d31fb123648e78aull
#define RW_INIT ((void *)NULL)
#define RW_DEST ((void *)-1UL)
typedef struct krwlock {
void *rw_owner;
void *rw_wr_owner;
uint64_t rw_magic;
pthread_rwlock_t rw_lock;
uint_t rw_readers;
} krwlock_t;
typedef int krw_t;
#define RW_READER 0
#define RW_WRITER 1
#define RW_DEFAULT RW_READER
#define RW_READ_HELD(x) ((x)->rw_readers > 0)
#define RW_WRITE_HELD(x) ((x)->rw_wr_owner == curthread)
#define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x))
#undef RW_LOCK_HELD
#define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x))
#undef RW_LOCK_HELD
#define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x))
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 uid_t crgetruid(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
*/
#define CV_MAGIC 0xd31ea9a83b1b30c4ull
typedef struct kcondvar {
uint64_t cv_magic;
pthread_cond_t cv;
} kcondvar_t;
#define CV_DEFAULT 0
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 clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
hrtime_t res, int flag);
extern void cv_signal(kcondvar_t *cv);
extern void cv_broadcast(kcondvar_t *cv);
#define cv_timedwait_interruptible(cv, mp, at) cv_timedwait(cv, mp, at)
#define cv_wait_interruptible(cv, mp) cv_wait(cv, mp)
#define cv_wait_io(cv, mp) cv_wait(cv, mp)
/*
* Thread-specific data
*/
#define tsd_get(k) pthread_getspecific(k)
#define tsd_set(k, v) pthread_setspecific(k, v)
#define tsd_create(kp, d) pthread_key_create(kp, d)
#define tsd_destroy(kp) /* nothing */
/*
* Thread-specific data
*/
#define tsd_get(k) pthread_getspecific(k)
#define tsd_set(k, v) pthread_setspecific(k, v)
#define tsd_create(kp, d) pthread_key_create(kp, d)
#define tsd_destroy(kp) /* nothing */
/*
* kstat creation, installation and deletion
*/
extern kstat_t *kstat_create(const char *, int,
const char *, const char *, uchar_t, ulong_t, uchar_t);
extern void kstat_install(kstat_t *);
extern void kstat_delete(kstat_t *);
extern void kstat_waitq_enter(kstat_io_t *);
extern void kstat_waitq_exit(kstat_io_t *);
extern void kstat_runq_enter(kstat_io_t *);
extern void kstat_runq_exit(kstat_io_t *);
extern void kstat_waitq_to_runq(kstat_io_t *);
extern void kstat_runq_back_to_waitq(kstat_io_t *);
extern void kstat_set_raw_ops(kstat_t *ksp,
int (*headers)(char *buf, size_t size),
int (*data)(char *buf, size_t size, void *data),
void *(*addr)(kstat_t *ksp, loff_t index));
/*
* Kernel memory
*/
#define KM_SLEEP UMEM_NOFAIL
#define KM_PUSHPAGE KM_SLEEP
#define KM_NOSLEEP UMEM_DEFAULT
#define KMC_NODEBUG UMC_NODEBUG
#define KMC_KMEM 0x0
#define KMC_VMEM 0x0
#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 vmem_alloc(_s, _f) kmem_alloc(_s, _f)
#define vmem_zalloc(_s, _f) kmem_zalloc(_s, _f)
#define vmem_free(_b, _s) kmem_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) /* nothing */
#define kmem_cache_set_move(_c, _cb) /* nothing */
#define POINTER_INVALIDATE(_pp) /* nothing */
#define POINTER_IS_VALID(_p) 0
typedef umem_cache_t kmem_cache_t;
typedef enum kmem_cbrc {
KMEM_CBRC_YES,
KMEM_CBRC_NO,
KMEM_CBRC_LATER,
KMEM_CBRC_DONT_NEED,
KMEM_CBRC_DONT_KNOW
} kmem_cbrc_t;
/*
* Task queues
*/
typedef struct taskq taskq_t;
typedef uintptr_t taskqid_t;
typedef void (task_func_t)(void *);
typedef struct taskq_ent {
struct taskq_ent *tqent_next;
struct taskq_ent *tqent_prev;
task_func_t *tqent_func;
void *tqent_arg;
uintptr_t tqent_flags;
} taskq_ent_t;
#define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */
#define TASKQ_PREPOPULATE 0x0001
#define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */
#define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */
#define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */
#define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */
#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 */
#define TQ_FRONT 0x08 /* Queue in front */
extern taskq_t *system_taskq;
extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
#define taskq_create_proc(a, b, c, d, e, p, f) \
(taskq_create(a, b, c, d, e, f))
#define taskq_create_sysdc(a, b, d, e, p, dc, f) \
(taskq_create(a, b, maxclsyspri, d, e, f))
extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
clock_t);
extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
taskq_ent_t *);
extern int taskq_empty_ent(taskq_ent_t *);
extern void taskq_init_ent(taskq_ent_t *);
extern void taskq_destroy(taskq_t *);
extern void taskq_wait(taskq_t *);
extern void taskq_wait_id(taskq_t *, taskqid_t);
extern int taskq_member(taskq_t *, kthread_t *);
extern int taskq_cancel_id(taskq_t *, taskqid_t);
extern void system_taskq_init(void);
extern void system_taskq_fini(void);
#define XVA_MAPSIZE 3
#define XVA_MAGIC 0x78766174
/*
* vnodes
*/
typedef struct vnode {
uint64_t v_size;
int v_fd;
char *v_path;
} vnode_t;
#define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */
typedef struct xoptattr {
timestruc_t xoa_createtime; /* Create time of file */
uint8_t xoa_archive;
uint8_t xoa_system;
uint8_t xoa_readonly;
uint8_t xoa_hidden;
uint8_t xoa_nounlink;
uint8_t xoa_immutable;
uint8_t xoa_appendonly;
uint8_t xoa_nodump;
uint8_t xoa_settable;
uint8_t xoa_opaque;
uint8_t xoa_av_quarantined;
uint8_t xoa_av_modified;
uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ];
uint8_t xoa_reparse;
uint8_t xoa_offline;
uint8_t xoa_sparse;
} xoptattr_t;
typedef struct vattr {
uint_t va_mask; /* bit-mask of attributes */
u_offset_t va_size; /* file size in bytes */
} vattr_t;
typedef struct xvattr {
vattr_t xva_vattr; /* Embedded vattr structure */
uint32_t xva_magic; /* Magic Number */
uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */
uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */
uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */
uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */
xoptattr_t xva_xoptattrs; /* Optional attributes */
} xvattr_t;
typedef struct vsecattr {
uint_t vsa_mask; /* See below */
int vsa_aclcnt; /* ACL entry count */
void *vsa_aclentp; /* pointer to ACL entries */
int vsa_dfaclcnt; /* default ACL entry count */
void *vsa_dfaclentp; /* pointer to default ACL entries */
size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */
} vsecattr_t;
#define AT_TYPE 0x00001
#define AT_MODE 0x00002
#define AT_UID 0x00004
#define AT_GID 0x00008
#define AT_FSID 0x00010
#define AT_NODEID 0x00020
#define AT_NLINK 0x00040
#define AT_SIZE 0x00080
#define AT_ATIME 0x00100
#define AT_MTIME 0x00200
#define AT_CTIME 0x00400
#define AT_RDEV 0x00800
#define AT_BLKSIZE 0x01000
#define AT_NBLOCKS 0x02000
#define AT_SEQ 0x08000
#define AT_XVATTR 0x10000
#define CRCREAT 0
extern int fop_getattr(vnode_t *vp, vattr_t *vap);
#define VOP_CLOSE(vp, f, c, o, cr, ct) vn_close(vp)
#define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0
#define VOP_GETATTR(vp, vap, fl, cr, ct) fop_getattr((vp), (vap));
#define VOP_FSYNC(vp, f, cr, ct) 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, int fd);
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 ddi_get_lbolt() (gethrtime() >> 23)
#define ddi_get_lbolt64() (gethrtime() >> 23)
#define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */
#define ddi_time_before(a, b) (a < b)
#define ddi_time_after(a, b) ddi_time_before(b, a)
#define ddi_time_before_eq(a, b) (!ddi_time_after(a, b))
#define ddi_time_after_eq(a, b) ddi_time_before_eq(b, a)
#define ddi_time_before64(a, b) (a < b)
#define ddi_time_after64(a, b) ddi_time_before64(b, a)
#define ddi_time_before_eq64(a, b) (!ddi_time_after64(a, b))
#define ddi_time_after_eq64(a, b) ddi_time_before_eq64(b, a)
extern void delay(clock_t ticks);
#define SEC_TO_TICK(sec) ((sec) * hz)
#define MSEC_TO_TICK(msec) ((msec) / (MILLISEC / hz))
#define USEC_TO_TICK(usec) ((usec) / (MICROSEC / hz))
#define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz))
#define gethrestime_sec() time(NULL)
#define gethrestime(t) \
do {\
(t)->tv_sec = gethrestime_sec();\
(t)->tv_nsec = 0;\
} while (0);
#define max_ncpus 64
#define num_online_cpus() (sysconf(_SC_NPROCESSORS_ONLN))
#define minclsyspri 60
#define maxclsyspri 99
#define CPU_SEQID (pthread_self() & (max_ncpus - 1))
#define kcred NULL
#define CRED() NULL
#define ptob(x) ((x) * PAGESIZE)
extern uint64_t physmem;
extern int highbit64(uint64_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)
extern char *kmem_vasprintf(const char *fmt, va_list adx);
extern char *kmem_asprintf(const char *fmt, ...);
#define strfree(str) kmem_free((str), strlen(str) + 1)
/*
* Hostname information
*/
extern char hw_serial[]; /* for userland-emulated hostid access */
extern int ddi_strtoul(const char *str, char **nptr, int base,
unsigned long *result);
extern int ddi_strtoull(const char *str, char **nptr, int base,
u_longlong_t *result);
typedef struct utsname utsname_t;
extern utsname_t *utsname(void);
/* ZFS Boot Related stuff. */
struct _buf {
intptr_t _fd;
};
struct bootstat {
uint64_t st_size;
};
typedef struct ace_object {
uid_t a_who;
uint32_t a_access_mask;
uint16_t a_flags;
uint16_t a_type;
uint8_t a_obj_type[16];
uint8_t a_inherit_obj_type[16];
} ace_object_t;
#define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
#define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
#define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
#define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
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);
/* SID stuff */
typedef struct ksiddomain {
uint_t kd_ref;
uint_t kd_len;
char *kd_name;
} ksiddomain_t;
ksiddomain_t *ksid_lookupdomain(const char *);
void ksiddomain_rele(ksiddomain_t *);
#define DDI_SLEEP KM_SLEEP
#define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
#define zfs_sleep_until(wakeup) \
do { \
hrtime_t delta = wakeup - gethrtime(); \
struct timespec ts; \
ts.tv_sec = delta / NANOSEC; \
ts.tv_nsec = delta % NANOSEC; \
(void) nanosleep(&ts, NULL); \
} while (0)
typedef int fstrans_cookie_t;
extern fstrans_cookie_t spl_fstrans_mark(void);
extern void spl_fstrans_unmark(fstrans_cookie_t);
extern int spl_fstrans_check(void);
#endif /* _KERNEL */
#endif /* _SYS_ZFS_CONTEXT_H */
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