usr/src/lib/libzpool/common/sys/zfs_context.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   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 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_ZFS_CONTEXT_H
  27 #define _SYS_ZFS_CONTEXT_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #define _SYS_MUTEX_H
  34 #define _SYS_RWLOCK_H
  35 #define _SYS_CONDVAR_H
  36 #define _SYS_SYSTM_H
  37 #define _SYS_DEBUG_H
  38 #define _SYS_T_LOCK_H
  39 #define _SYS_VNODE_H
  40 #define _SYS_VFS_H
  41 #define _SYS_SUNDDI_H
  42 #define _SYS_CALLB_H
  43
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <stddef.h>
  47 #include <stdarg.h>
  48 #include <fcntl.h>
  49 #include <unistd.h>
  50 #include <errno.h>
  51 #include <string.h>
  52 #include <strings.h>
  53 #include <synch.h>
  54 #include <thread.h>
  55 #include <assert.h>
  56 #include <alloca.h>
  57 #include <umem.h>
  58 #include <limits.h>
  59 #include <atomic.h>
  60 #include <dirent.h>
  61 #include <time.h>
  62 #include <sys/note.h>
  63 #include <sys/types.h>
  64 #include <sys/cred.h>
  65 #include <sys/sysmacros.h>
  66 #include <sys/bitmap.h>
  67 #include <sys/resource.h>
  68 #include <sys/byteorder.h>
  69 #include <sys/list.h>
  70 #include <sys/uio.h>
  71 #include <sys/zfs_debug.h>
  72 #include <sys/sdt.h>
  73 #include <sys/kstat.h>
  74 #include <sys/u8_textprep.h>
  75 #include <sys/sysevent/eventdefs.h>
  76
  77 /*
  78  * Debugging
  79  */
  80
  81 /*
  82  * Note that we are not using the debugging levels.
  83  */
  84
  85 #define CE_CONT         0       /* continuation         */
  86 #define CE_NOTE         1       /* notice               */
  87 #define CE_WARN         2       /* warning              */
  88 #define CE_PANIC        3       /* panic                */
  89 #define CE_IGNORE       4       /* print nothing        */
  90
  91 /*
  92  * ZFS debugging
  93  */
  94
  95 #ifdef ZFS_DEBUG
  96 extern void dprintf_setup(int *argc, char **argv);
  97 #endif /* ZFS_DEBUG */
  98
  99 extern void cmn_err(int, const char *, ...);
 100 extern void vcmn_err(int, const char *, __va_list);
 101 extern void panic(const char *, ...);
 102 extern void vpanic(const char *, __va_list);
 103
 104 #define fm_panic        panic
 105
 106 /* This definition is copied from assert.h. */
 107 #if defined(__STDC__)
 108 #if __STDC_VERSION__ - 0 >= 199901L
 109 #define verify(EX) (void)((EX) || \
 110         (__assert_c99(#EX, __FILE__, __LINE__, __func__), 0))
 111 #else
 112 #define verify(EX) (void)((EX) || (__assert(#EX, __FILE__, __LINE__), 0))
 113 #endif /* __STDC_VERSION__ - 0 >= 199901L */
 114 #else
 115 #define verify(EX) (void)((EX) || (_assert("EX", __FILE__, __LINE__), 0))
 116 #endif  /* __STDC__ */
 117
 118
 119 #define VERIFY  verify
 120 #define ASSERT  assert
 121
 122 extern void __assert(const char *, const char *, int);
 123
 124 #ifdef lint
 125 #define VERIFY3_IMPL(x, y, z, t)        if (x == z) ((void)0)
 126 #else
 127 /* BEGIN CSTYLED */
 128 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
 129         const TYPE __left = (TYPE)(LEFT); \
 130         const TYPE __right = (TYPE)(RIGHT); \
 131         if (!(__left OP __right)) { \
 132                 char *__buf = alloca(256); \
 133                 (void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
 134                         #LEFT, #OP, #RIGHT, \
 135                         (u_longlong_t)__left, #OP, (u_longlong_t)__right); \
 136                 __assert(__buf, __FILE__, __LINE__); \
 137         } \
 138 _NOTE(CONSTCOND) } while (0)
 139 /* END CSTYLED */
 140 #endif /* lint */
 141
 142 #define VERIFY3S(x, y, z)       VERIFY3_IMPL(x, y, z, int64_t)
 143 #define VERIFY3U(x, y, z)       VERIFY3_IMPL(x, y, z, uint64_t)
 144 #define VERIFY3P(x, y, z)       VERIFY3_IMPL(x, y, z, uintptr_t)
 145
 146 #ifdef NDEBUG
 147 #define ASSERT3S(x, y, z)       ((void)0)
 148 #define ASSERT3U(x, y, z)       ((void)0)
 149 #define ASSERT3P(x, y, z)       ((void)0)
 150 #else
 151 #define ASSERT3S(x, y, z)       VERIFY3S(x, y, z)
 152 #define ASSERT3U(x, y, z)       VERIFY3U(x, y, z)
 153 #define ASSERT3P(x, y, z)       VERIFY3P(x, y, z)
 154 #endif
 155
 156 /*
 157  * DTrace SDT probes have different signatures in userland than they do in
 158  * kernel.  If they're being used in kernel code, re-define them out of
 159  * existence for their counterparts in libzpool.
 160  */
 161
 162 #ifdef DTRACE_PROBE
 163 #undef  DTRACE_PROBE
 164 #define DTRACE_PROBE(a) ((void)0)
 165 #endif  /* DTRACE_PROBE */
 166
 167 #ifdef DTRACE_PROBE1
 168 #undef  DTRACE_PROBE1
 169 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 170 #endif  /* DTRACE_PROBE1 */
 171
 172 #ifdef DTRACE_PROBE2
 173 #undef  DTRACE_PROBE2
 174 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 175 #endif  /* DTRACE_PROBE2 */
 176
 177 #ifdef DTRACE_PROBE3
 178 #undef  DTRACE_PROBE3
 179 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 180 #endif  /* DTRACE_PROBE3 */
 181
 182 #ifdef DTRACE_PROBE4
 183 #undef  DTRACE_PROBE4
 184 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 185 #endif  /* DTRACE_PROBE4 */
 186
 187 /*
 188  * Threads
 189  */
 190 #define curthread       ((void *)(uintptr_t)thr_self())
 191
 192 typedef struct kthread kthread_t;
 193
 194 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 195         zk_thread_create(func, arg)
 196 #define thread_exit() thr_exit(NULL)
 197
 198 extern kthread_t *zk_thread_create(void (*func)(), void *arg);
 199
 200 #define issig(why)      (FALSE)
 201 #define ISSIG(thr, why) (FALSE)
 202
 203 /*
 204  * Mutexes
 205  */
 206 typedef struct kmutex {
 207         void            *m_owner;
 208         boolean_t       initialized;
 209         mutex_t         m_lock;
 210 } kmutex_t;
 211
 212 #define MUTEX_DEFAULT   USYNC_THREAD
 213 #undef MUTEX_HELD
 214 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
 215
 216 /*
 217  * Argh -- we have to get cheesy here because the kernel and userland
 218  * have different signatures for the same routine.
 219  */
 220 extern int _mutex_init(mutex_t *mp, int type, void *arg);
 221 extern int _mutex_destroy(mutex_t *mp);
 222
 223 #define mutex_init(mp, b, c, d)         zmutex_init((kmutex_t *)(mp))
 224 #define mutex_destroy(mp)               zmutex_destroy((kmutex_t *)(mp))
 225
 226 extern void zmutex_init(kmutex_t *mp);
 227 extern void zmutex_destroy(kmutex_t *mp);
 228 extern void mutex_enter(kmutex_t *mp);
 229 extern void mutex_exit(kmutex_t *mp);
 230 extern int mutex_tryenter(kmutex_t *mp);
 231 extern void *mutex_owner(kmutex_t *mp);
 232
 233 /*
 234  * RW locks
 235  */
 236 typedef struct krwlock {
 237         void            *rw_owner;
 238         boolean_t       initialized;
 239         rwlock_t        rw_lock;
 240 } krwlock_t;
 241
 242 typedef int krw_t;
 243
 244 #define RW_READER       0
 245 #define RW_WRITER       1
 246 #define RW_DEFAULT      USYNC_THREAD
 247
 248 #undef RW_READ_HELD
 249 #define RW_READ_HELD(x)         _rw_read_held(&(x)->rw_lock)
 250
 251 #undef RW_WRITE_HELD
 252 #define RW_WRITE_HELD(x)        _rw_write_held(&(x)->rw_lock)
 253
 254 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 255 extern void rw_destroy(krwlock_t *rwlp);
 256 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 257 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 258 extern int rw_tryupgrade(krwlock_t *rwlp);
 259 extern void rw_exit(krwlock_t *rwlp);
 260 #define rw_downgrade(rwlp) do { } while (0)
 261
 262 extern uid_t crgetuid(cred_t *cr);
 263 extern gid_t crgetgid(cred_t *cr);
 264 extern int crgetngroups(cred_t *cr);
 265 extern gid_t *crgetgroups(cred_t *cr);
 266
 267 /*
 268  * Condition variables
 269  */
 270 typedef cond_t kcondvar_t;
 271
 272 #define CV_DEFAULT      USYNC_THREAD
 273
 274 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 275 extern void cv_destroy(kcondvar_t *cv);
 276 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 277 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 278 extern void cv_signal(kcondvar_t *cv);
 279 extern void cv_broadcast(kcondvar_t *cv);
 280
 281 /*
 282  * kstat creation, installation and deletion
 283  */
 284 extern kstat_t *kstat_create(char *, int,
 285     char *, char *, uchar_t, ulong_t, uchar_t);
 286 extern void kstat_install(kstat_t *);
 287 extern void kstat_delete(kstat_t *);
 288
 289 /*
 290  * Kernel memory
 291  */
 292 #define KM_SLEEP                UMEM_NOFAIL
 293 #define KM_PUSHPAGE             KM_SLEEP
 294 #define KM_NOSLEEP              UMEM_DEFAULT
 295 #define KMC_NODEBUG             UMC_NODEBUG
 296 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 297 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 298 #define kmem_free(_b, _s)       umem_free(_b, _s)
 299 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 300         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 301 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 302 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 303 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 304 #define kmem_debugging()        0
 305 #define kmem_cache_reap_now(c)
 306
 307 typedef umem_cache_t kmem_cache_t;
 308
 309 /*
 310  * Task queues
 311  */
 312 typedef struct taskq taskq_t;
 313 typedef uintptr_t taskqid_t;
 314 typedef void (task_func_t)(void *);
 315
 316 #define TASKQ_PREPOPULATE       0x0001
 317 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 318 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 319
 320 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 321 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 322 #define TQ_NOQUEUE      0x02    /* Do not enqueue if can't dispatch */
 323
 324 extern taskq_t *system_taskq;
 325
 326 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 327 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 328 extern void     taskq_destroy(taskq_t *);
 329 extern void     taskq_wait(taskq_t *);
 330 extern int      taskq_member(taskq_t *, void *);
 331 extern void     system_taskq_init(void);
 332
 333 #define XVA_MAPSIZE     3
 334 #define XVA_MAGIC       0x78766174
 335
 336 /*
 337  * vnodes
 338  */
 339 typedef struct vnode {
 340         uint64_t        v_size;
 341         int             v_fd;
 342         char            *v_path;
 343 } vnode_t;
 344
 345
 346 typedef struct xoptattr {
 347         timestruc_t     xoa_createtime; /* Create time of file */
 348         uint8_t         xoa_archive;
 349         uint8_t         xoa_system;
 350         uint8_t         xoa_readonly;
 351         uint8_t         xoa_hidden;
 352         uint8_t         xoa_nounlink;
 353         uint8_t         xoa_immutable;
 354         uint8_t         xoa_appendonly;
 355         uint8_t         xoa_nodump;
 356         uint8_t         xoa_settable;
 357         uint8_t         xoa_opaque;
 358         uint8_t         xoa_av_quarantined;
 359         uint8_t         xoa_av_modified;
 360 } xoptattr_t;
 361
 362 typedef struct vattr {
 363         uint_t          va_mask;        /* bit-mask of attributes */
 364         u_offset_t      va_size;        /* file size in bytes */
 365 } vattr_t;
 366
 367
 368 typedef struct xvattr {
 369         vattr_t         xva_vattr;      /* Embedded vattr structure */
 370         uint32_t        xva_magic;      /* Magic Number */
 371         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 372         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 373         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 374         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 375         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 376 } xvattr_t;
 377
 378 typedef struct vsecattr {
 379         uint_t          vsa_mask;       /* See below */
 380         int             vsa_aclcnt;     /* ACL entry count */
 381         void            *vsa_aclentp;   /* pointer to ACL entries */
 382         int             vsa_dfaclcnt;   /* default ACL entry count */
 383         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 384         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 385 } vsecattr_t;
 386
 387 #define AT_TYPE         0x00001
 388 #define AT_MODE         0x00002
 389 #define AT_UID          0x00004
 390 #define AT_GID          0x00008
 391 #define AT_FSID         0x00010
 392 #define AT_NODEID       0x00020
 393 #define AT_NLINK        0x00040
 394 #define AT_SIZE         0x00080
 395 #define AT_ATIME        0x00100
 396 #define AT_MTIME        0x00200
 397 #define AT_CTIME        0x00400
 398 #define AT_RDEV         0x00800
 399 #define AT_BLKSIZE      0x01000
 400 #define AT_NBLOCKS      0x02000
 401 #define AT_SEQ          0x08000
 402 #define AT_XVATTR       0x10000
 403
 404 #define CRCREAT         0
 405
 406 #define VOP_CLOSE(vp, f, c, o, cr, ct)  0
 407 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 408 #define VOP_GETATTR(vp, vap, fl, cr, ct)  ((vap)->va_size = (vp)->v_size, 0)
 409
 410 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 411
 412 #define VN_RELE(vp)     vn_close(vp)
 413
 414 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 415     int x2, int x3);
 416 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 417     int x2, int x3, vnode_t *vp, int fd);
 418 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 419     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 420 extern void vn_close(vnode_t *vp);
 421
 422 #define vn_remove(path, x1, x2)         remove(path)
 423 #define vn_rename(from, to, seg)        rename((from), (to))
 424 #define vn_is_readonly(vp)              B_FALSE
 425
 426 extern vnode_t *rootdir;
 427
 428 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 429
 430 /*
 431  * Random stuff
 432  */
 433 #define lbolt   (gethrtime() >> 23)
 434 #define lbolt64 (gethrtime() >> 23)
 435 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 436
 437 extern void delay(clock_t ticks);
 438
 439 #define gethrestime_sec() time(NULL)
 440
 441 #define max_ncpus       64
 442
 443 #define minclsyspri     60
 444 #define maxclsyspri     99
 445
 446 #define CPU_SEQID       (thr_self() & (max_ncpus - 1))
 447
 448 #define kcred           NULL
 449 #define CRED()          NULL
 450
 451 #define ptob(x)         ((x) * PAGESIZE)
 452
 453 extern uint64_t physmem;
 454
 455 extern int highbit(ulong_t i);
 456 extern int random_get_bytes(uint8_t *ptr, size_t len);
 457 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 458
 459 extern void kernel_init(int);
 460 extern void kernel_fini(void);
 461
 462 struct spa;
 463 extern void nicenum(uint64_t num, char *buf);
 464 extern void show_pool_stats(struct spa *);
 465
 466 typedef struct callb_cpr {
 467         kmutex_t        *cc_lockp;
 468 } callb_cpr_t;
 469
 470 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 471         (cp)->cc_lockp = lockp;                                 \
 472 }
 473
 474 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 475         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 476 }
 477
 478 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 479         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 480 }
 481
 482 #define CALLB_CPR_EXIT(cp) {                                    \
 483         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 484         mutex_exit((cp)->cc_lockp);                             \
 485 }
 486
 487 #define zone_dataset_visible(x, y)      (1)
 488 #define INGLOBALZONE(z)                 (1)
 489
 490 /*
 491  * Hostname information
 492  */
 493 extern char hw_serial[];
 494 extern int ddi_strtoul(const char *str, char **nptr, int base,
 495     unsigned long *result);
 496
 497 /* ZFS Boot Related stuff. */
 498
 499 struct _buf {
 500         intptr_t        _fd;
 501 };
 502
 503 struct bootstat {
 504         uint64_t st_size;
 505 };
 506
 507 typedef struct ace_object {
 508         uid_t           a_who;
 509         uint32_t        a_access_mask;
 510         uint16_t        a_flags;
 511         uint16_t        a_type;
 512         uint8_t         a_obj_type[16];
 513         uint8_t         a_inherit_obj_type[16];
 514 } ace_object_t;
 515
 516
 517 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 518 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 519 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 520 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 521
 522 extern struct _buf *kobj_open_file(char *name);
 523 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 524     unsigned off);
 525 extern void kobj_close_file(struct _buf *file);
 526 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 527 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 528 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 529     cred_t *cr);
 530 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 531 extern zoneid_t getzoneid(void);
 532
 533 /* SID stuff */
 534 typedef struct ksiddomain {
 535         uint_t  kd_ref;
 536         uint_t  kd_len;
 537         char    *kd_name;
 538 } ksiddomain_t;
 539
 540 ksiddomain_t *ksid_lookupdomain(const char *);
 541 void ksiddomain_rele(ksiddomain_t *);
 542
 543 #ifdef  __cplusplus
 544 }
 545 #endif
 546
 547 #endif  /* _SYS_ZFS_CONTEXT_H */