include/linux/ceph/rados.h

   1 #ifndef CEPH_RADOS_H
   2 #define CEPH_RADOS_H
   3
   4 /*
   5  * Data types for the Ceph distributed object storage layer RADOS
   6  * (Reliable Autonomic Distributed Object Store).
   7  */
   8
   9 #include <linux/ceph/msgr.h>
  10
  11 /*
  12  * fs id
  13  */
  14 struct ceph_fsid {
  15         unsigned char fsid[16];
  16 };
  17
  18 static inline int ceph_fsid_compare(const struct ceph_fsid *a,
  19                                     const struct ceph_fsid *b)
  20 {
  21         return memcmp(a, b, sizeof(*a));
  22 }
  23
  24 /*
  25  * ino, object, etc.
  26  */
  27 typedef __le64 ceph_snapid_t;
  28 #define CEPH_SNAPDIR ((__u64)(-1))  /* reserved for hidden .snap dir */
  29 #define CEPH_NOSNAP  ((__u64)(-2))  /* "head", "live" revision */
  30 #define CEPH_MAXSNAP ((__u64)(-3))  /* largest valid snapid */
  31
  32 struct ceph_timespec {
  33         __le32 tv_sec;
  34         __le32 tv_nsec;
  35 } __attribute__ ((packed));
  36
  37
  38 /*
  39  * object layout - how objects are mapped into PGs
  40  */
  41 #define CEPH_OBJECT_LAYOUT_HASH     1
  42 #define CEPH_OBJECT_LAYOUT_LINEAR   2
  43 #define CEPH_OBJECT_LAYOUT_HASHINO  3
  44
  45 /*
  46  * pg layout -- how PGs are mapped onto (sets of) OSDs
  47  */
  48 #define CEPH_PG_LAYOUT_CRUSH  0
  49 #define CEPH_PG_LAYOUT_HASH   1
  50 #define CEPH_PG_LAYOUT_LINEAR 2
  51 #define CEPH_PG_LAYOUT_HYBRID 3
  52
  53 #define CEPH_PG_MAX_SIZE      32  /* max # osds in a single pg */
  54
  55 /*
  56  * placement group.
  57  * we encode this into one __le64.
  58  */
  59 struct ceph_pg_v1 {
  60         __le16 preferred; /* preferred primary osd */
  61         __le16 ps;        /* placement seed */
  62         __le32 pool;      /* object pool */
  63 } __attribute__ ((packed));
  64
  65 /*
  66  * pg_pool is a set of pgs storing a pool of objects
  67  *
  68  *  pg_num -- base number of pseudorandomly placed pgs
  69  *
  70  *  pgp_num -- effective number when calculating pg placement.  this
  71  * is used for pg_num increases.  new pgs result in data being "split"
  72  * into new pgs.  for this to proceed smoothly, new pgs are intiially
  73  * colocated with their parents; that is, pgp_num doesn't increase
  74  * until the new pgs have successfully split.  only _then_ are the new
  75  * pgs placed independently.
  76  *
  77  *  lpg_num -- localized pg count (per device).  replicas are randomly
  78  * selected.
  79  *
  80  *  lpgp_num -- as above.
  81  */
  82 #define CEPH_NOPOOL  ((__u64) (-1))  /* pool id not defined */
  83
  84 #define CEPH_POOL_TYPE_REP     1
  85 #define CEPH_POOL_TYPE_RAID4   2 /* never implemented */
  86 #define CEPH_POOL_TYPE_EC      3
  87
  88 /*
  89  * stable_mod func is used to control number of placement groups.
  90  * similar to straight-up modulo, but produces a stable mapping as b
  91  * increases over time.  b is the number of bins, and bmask is the
  92  * containing power of 2 minus 1.
  93  *
  94  * b <= bmask and bmask=(2**n)-1
  95  * e.g., b=12 -> bmask=15, b=123 -> bmask=127
  96  */
  97 static inline int ceph_stable_mod(int x, int b, int bmask)
  98 {
  99         if ((x & bmask) < b)
 100                 return x & bmask;
 101         else
 102                 return x & (bmask >> 1);
 103 }
 104
 105 /*
 106  * object layout - how a given object should be stored.
 107  */
 108 struct ceph_object_layout {
 109         struct ceph_pg_v1 ol_pgid;   /* raw pg, with _full_ ps precision. */
 110         __le32 ol_stripe_unit;    /* for per-object parity, if any */
 111 } __attribute__ ((packed));
 112
 113 /*
 114  * compound epoch+version, used by storage layer to serialize mutations
 115  */
 116 struct ceph_eversion {
 117         __le64 version;
 118         __le32 epoch;
 119 } __attribute__ ((packed));
 120
 121 /*
 122  * osd map bits
 123  */
 124
 125 /* status bits */
 126 #define CEPH_OSD_EXISTS  (1<<0)
 127 #define CEPH_OSD_UP      (1<<1)
 128 #define CEPH_OSD_AUTOOUT (1<<2)  /* osd was automatically marked out */
 129 #define CEPH_OSD_NEW     (1<<3)  /* osd is new, never marked in */
 130
 131 extern const char *ceph_osd_state_name(int s);
 132
 133 /* osd weights.  fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
 134 #define CEPH_OSD_IN  0x10000
 135 #define CEPH_OSD_OUT 0
 136
 137 /* osd primary-affinity.  fixed point value: 0x10000 == baseline */
 138 #define CEPH_OSD_MAX_PRIMARY_AFFINITY 0x10000
 139 #define CEPH_OSD_DEFAULT_PRIMARY_AFFINITY 0x10000
 140
 141
 142 /*
 143  * osd map flag bits
 144  */
 145 #define CEPH_OSDMAP_NEARFULL (1<<0)  /* sync writes (near ENOSPC) */
 146 #define CEPH_OSDMAP_FULL     (1<<1)  /* no data writes (ENOSPC) */
 147 #define CEPH_OSDMAP_PAUSERD  (1<<2)  /* pause all reads */
 148 #define CEPH_OSDMAP_PAUSEWR  (1<<3)  /* pause all writes */
 149 #define CEPH_OSDMAP_PAUSEREC (1<<4)  /* pause recovery */
 150 #define CEPH_OSDMAP_NOUP     (1<<5)  /* block osd boot */
 151 #define CEPH_OSDMAP_NODOWN   (1<<6)  /* block osd mark-down/failure */
 152 #define CEPH_OSDMAP_NOOUT    (1<<7)  /* block osd auto mark-out */
 153 #define CEPH_OSDMAP_NOIN     (1<<8)  /* block osd auto mark-in */
 154 #define CEPH_OSDMAP_NOBACKFILL (1<<9) /* block osd backfill */
 155 #define CEPH_OSDMAP_NORECOVER (1<<10) /* block osd recovery and backfill */
 156 #define CEPH_OSDMAP_NOSCRUB  (1<<11) /* block periodic scrub */
 157 #define CEPH_OSDMAP_NODEEP_SCRUB (1<<12) /* block periodic deep-scrub */
 158 #define CEPH_OSDMAP_NOTIERAGENT (1<<13) /* disable tiering agent */
 159 #define CEPH_OSDMAP_NOREBALANCE (1<<14) /* block osd backfill unless pg is degraded */
 160 #define CEPH_OSDMAP_SORTBITWISE (1<<15) /* use bitwise hobject_t sort */
 161
 162 /*
 163  * The error code to return when an OSD can't handle a write
 164  * because it is too large.
 165  */
 166 #define OSD_WRITETOOBIG EMSGSIZE
 167
 168 /*
 169  * osd ops
 170  *
 171  * WARNING: do not use these op codes directly.  Use the helpers
 172  * defined below instead.  In certain cases, op code behavior was
 173  * redefined, resulting in special-cases in the helpers.
 174  */
 175 #define CEPH_OSD_OP_MODE       0xf000
 176 #define CEPH_OSD_OP_MODE_RD    0x1000
 177 #define CEPH_OSD_OP_MODE_WR    0x2000
 178 #define CEPH_OSD_OP_MODE_RMW   0x3000
 179 #define CEPH_OSD_OP_MODE_SUB   0x4000
 180 #define CEPH_OSD_OP_MODE_CACHE 0x8000
 181
 182 #define CEPH_OSD_OP_TYPE       0x0f00
 183 #define CEPH_OSD_OP_TYPE_LOCK  0x0100
 184 #define CEPH_OSD_OP_TYPE_DATA  0x0200
 185 #define CEPH_OSD_OP_TYPE_ATTR  0x0300
 186 #define CEPH_OSD_OP_TYPE_EXEC  0x0400
 187 #define CEPH_OSD_OP_TYPE_PG    0x0500
 188 #define CEPH_OSD_OP_TYPE_MULTI 0x0600 /* multiobject */
 189
 190 #define __CEPH_OSD_OP1(mode, nr) \
 191         (CEPH_OSD_OP_MODE_##mode | (nr))
 192
 193 #define __CEPH_OSD_OP(mode, type, nr) \
 194         (CEPH_OSD_OP_MODE_##mode | CEPH_OSD_OP_TYPE_##type | (nr))
 195
 196 #define __CEPH_FORALL_OSD_OPS(f)                                            \
 197         /** data **/                                                        \
 198         /* read */                                                          \
 199         f(READ,         __CEPH_OSD_OP(RD, DATA, 1),     "read")             \
 200         f(STAT,         __CEPH_OSD_OP(RD, DATA, 2),     "stat")             \
 201         f(MAPEXT,       __CEPH_OSD_OP(RD, DATA, 3),     "mapext")           \
 202                                                                             \
 203         /* fancy read */                                                    \
 204         f(MASKTRUNC,    __CEPH_OSD_OP(RD, DATA, 4),     "masktrunc")        \
 205         f(SPARSE_READ,  __CEPH_OSD_OP(RD, DATA, 5),     "sparse-read")      \
 206                                                                             \
 207         f(NOTIFY,       __CEPH_OSD_OP(RD, DATA, 6),     "notify")           \
 208         f(NOTIFY_ACK,   __CEPH_OSD_OP(RD, DATA, 7),     "notify-ack")       \
 209                                                                             \
 210         /* versioning */                                                    \
 211         f(ASSERT_VER,   __CEPH_OSD_OP(RD, DATA, 8),     "assert-version")   \
 212                                                                             \
 213         f(LIST_WATCHERS, __CEPH_OSD_OP(RD, DATA, 9),    "list-watchers")    \
 214                                                                             \
 215         f(LIST_SNAPS,   __CEPH_OSD_OP(RD, DATA, 10),    "list-snaps")       \
 216                                                                             \
 217         /* sync */                                                          \
 218         f(SYNC_READ,    __CEPH_OSD_OP(RD, DATA, 11),    "sync_read")        \
 219                                                                             \
 220         /* write */                                                         \
 221         f(WRITE,        __CEPH_OSD_OP(WR, DATA, 1),     "write")            \
 222         f(WRITEFULL,    __CEPH_OSD_OP(WR, DATA, 2),     "writefull")        \
 223         f(TRUNCATE,     __CEPH_OSD_OP(WR, DATA, 3),     "truncate")         \
 224         f(ZERO,         __CEPH_OSD_OP(WR, DATA, 4),     "zero")             \
 225         f(DELETE,       __CEPH_OSD_OP(WR, DATA, 5),     "delete")           \
 226                                                                             \
 227         /* fancy write */                                                   \
 228         f(APPEND,       __CEPH_OSD_OP(WR, DATA, 6),     "append")           \
 229         f(STARTSYNC,    __CEPH_OSD_OP(WR, DATA, 7),     "startsync")        \
 230         f(SETTRUNC,     __CEPH_OSD_OP(WR, DATA, 8),     "settrunc")         \
 231         f(TRIMTRUNC,    __CEPH_OSD_OP(WR, DATA, 9),     "trimtrunc")        \
 232                                                                             \
 233         f(TMAPUP,       __CEPH_OSD_OP(RMW, DATA, 10),   "tmapup")           \
 234         f(TMAPPUT,      __CEPH_OSD_OP(WR, DATA, 11),    "tmapput")          \
 235         f(TMAPGET,      __CEPH_OSD_OP(RD, DATA, 12),    "tmapget")          \
 236                                                                             \
 237         f(CREATE,       __CEPH_OSD_OP(WR, DATA, 13),    "create")           \
 238         f(ROLLBACK,     __CEPH_OSD_OP(WR, DATA, 14),    "rollback")         \
 239                                                                             \
 240         f(WATCH,        __CEPH_OSD_OP(WR, DATA, 15),    "watch")            \
 241                                                                             \
 242         /* omap */                                                          \
 243         f(OMAPGETKEYS,  __CEPH_OSD_OP(RD, DATA, 17),    "omap-get-keys")    \
 244         f(OMAPGETVALS,  __CEPH_OSD_OP(RD, DATA, 18),    "omap-get-vals")    \
 245         f(OMAPGETHEADER, __CEPH_OSD_OP(RD, DATA, 19),   "omap-get-header")  \
 246         f(OMAPGETVALSBYKEYS, __CEPH_OSD_OP(RD, DATA, 20), "omap-get-vals-by-keys") \
 247         f(OMAPSETVALS,  __CEPH_OSD_OP(WR, DATA, 21),    "omap-set-vals")    \
 248         f(OMAPSETHEADER, __CEPH_OSD_OP(WR, DATA, 22),   "omap-set-header")  \
 249         f(OMAPCLEAR,    __CEPH_OSD_OP(WR, DATA, 23),    "omap-clear")       \
 250         f(OMAPRMKEYS,   __CEPH_OSD_OP(WR, DATA, 24),    "omap-rm-keys")     \
 251         f(OMAP_CMP,     __CEPH_OSD_OP(RD, DATA, 25),    "omap-cmp")         \
 252                                                                             \
 253         /* tiering */                                                       \
 254         f(COPY_FROM,    __CEPH_OSD_OP(WR, DATA, 26),    "copy-from")        \
 255         f(COPY_GET_CLASSIC, __CEPH_OSD_OP(RD, DATA, 27), "copy-get-classic") \
 256         f(UNDIRTY,      __CEPH_OSD_OP(WR, DATA, 28),    "undirty")          \
 257         f(ISDIRTY,      __CEPH_OSD_OP(RD, DATA, 29),    "isdirty")          \
 258         f(COPY_GET,     __CEPH_OSD_OP(RD, DATA, 30),    "copy-get")         \
 259         f(CACHE_FLUSH,  __CEPH_OSD_OP(CACHE, DATA, 31), "cache-flush")      \
 260         f(CACHE_EVICT,  __CEPH_OSD_OP(CACHE, DATA, 32), "cache-evict")      \
 261         f(CACHE_TRY_FLUSH, __CEPH_OSD_OP(CACHE, DATA, 33), "cache-try-flush") \
 262                                                                             \
 263         /* convert tmap to omap */                                          \
 264         f(TMAP2OMAP,    __CEPH_OSD_OP(RMW, DATA, 34),   "tmap2omap")        \
 265                                                                             \
 266         /* hints */                                                         \
 267         f(SETALLOCHINT, __CEPH_OSD_OP(WR, DATA, 35),    "set-alloc-hint")   \
 268                                                                             \
 269         /** multi **/                                                       \
 270         f(CLONERANGE,   __CEPH_OSD_OP(WR, MULTI, 1),    "clonerange")       \
 271         f(ASSERT_SRC_VERSION, __CEPH_OSD_OP(RD, MULTI, 2), "assert-src-version") \
 272         f(SRC_CMPXATTR, __CEPH_OSD_OP(RD, MULTI, 3),    "src-cmpxattr")     \
 273                                                                             \
 274         /** attrs **/                                                       \
 275         /* read */                                                          \
 276         f(GETXATTR,     __CEPH_OSD_OP(RD, ATTR, 1),     "getxattr")         \
 277         f(GETXATTRS,    __CEPH_OSD_OP(RD, ATTR, 2),     "getxattrs")        \
 278         f(CMPXATTR,     __CEPH_OSD_OP(RD, ATTR, 3),     "cmpxattr")         \
 279                                                                             \
 280         /* write */                                                         \
 281         f(SETXATTR,     __CEPH_OSD_OP(WR, ATTR, 1),     "setxattr")         \
 282         f(SETXATTRS,    __CEPH_OSD_OP(WR, ATTR, 2),     "setxattrs")        \
 283         f(RESETXATTRS,  __CEPH_OSD_OP(WR, ATTR, 3),     "resetxattrs")      \
 284         f(RMXATTR,      __CEPH_OSD_OP(WR, ATTR, 4),     "rmxattr")          \
 285                                                                             \
 286         /** subop **/                                                       \
 287         f(PULL,         __CEPH_OSD_OP1(SUB, 1),         "pull")             \
 288         f(PUSH,         __CEPH_OSD_OP1(SUB, 2),         "push")             \
 289         f(BALANCEREADS, __CEPH_OSD_OP1(SUB, 3),         "balance-reads")    \
 290         f(UNBALANCEREADS, __CEPH_OSD_OP1(SUB, 4),       "unbalance-reads")  \
 291         f(SCRUB,        __CEPH_OSD_OP1(SUB, 5),         "scrub")            \
 292         f(SCRUB_RESERVE, __CEPH_OSD_OP1(SUB, 6),        "scrub-reserve")    \
 293         f(SCRUB_UNRESERVE, __CEPH_OSD_OP1(SUB, 7),      "scrub-unreserve")  \
 294         f(SCRUB_STOP,   __CEPH_OSD_OP1(SUB, 8),         "scrub-stop")       \
 295         f(SCRUB_MAP,    __CEPH_OSD_OP1(SUB, 9),         "scrub-map")        \
 296                                                                             \
 297         /** lock **/                                                        \
 298         f(WRLOCK,       __CEPH_OSD_OP(WR, LOCK, 1),     "wrlock")           \
 299         f(WRUNLOCK,     __CEPH_OSD_OP(WR, LOCK, 2),     "wrunlock")         \
 300         f(RDLOCK,       __CEPH_OSD_OP(WR, LOCK, 3),     "rdlock")           \
 301         f(RDUNLOCK,     __CEPH_OSD_OP(WR, LOCK, 4),     "rdunlock")         \
 302         f(UPLOCK,       __CEPH_OSD_OP(WR, LOCK, 5),     "uplock")           \
 303         f(DNLOCK,       __CEPH_OSD_OP(WR, LOCK, 6),     "dnlock")           \
 304                                                                             \
 305         /** exec **/                                                        \
 306         /* note: the RD bit here is wrong; see special-case below in helper */ \
 307         f(CALL,         __CEPH_OSD_OP(RD, EXEC, 1),     "call")             \
 308                                                                             \
 309         /** pg **/                                                          \
 310         f(PGLS,         __CEPH_OSD_OP(RD, PG, 1),       "pgls")             \
 311         f(PGLS_FILTER,  __CEPH_OSD_OP(RD, PG, 2),       "pgls-filter")      \
 312         f(PG_HITSET_LS, __CEPH_OSD_OP(RD, PG, 3),       "pg-hitset-ls")     \
 313         f(PG_HITSET_GET, __CEPH_OSD_OP(RD, PG, 4),      "pg-hitset-get")
 314
 315 enum {
 316 #define GENERATE_ENUM_ENTRY(op, opcode, str)    CEPH_OSD_OP_##op = (opcode),
 317 __CEPH_FORALL_OSD_OPS(GENERATE_ENUM_ENTRY)
 318 #undef GENERATE_ENUM_ENTRY
 319 };
 320
 321 static inline int ceph_osd_op_type_lock(int op)
 322 {
 323         return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK;
 324 }
 325 static inline int ceph_osd_op_type_data(int op)
 326 {
 327         return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA;
 328 }
 329 static inline int ceph_osd_op_type_attr(int op)
 330 {
 331         return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR;
 332 }
 333 static inline int ceph_osd_op_type_exec(int op)
 334 {
 335         return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC;
 336 }
 337 static inline int ceph_osd_op_type_pg(int op)
 338 {
 339         return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG;
 340 }
 341 static inline int ceph_osd_op_type_multi(int op)
 342 {
 343         return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_MULTI;
 344 }
 345
 346 static inline int ceph_osd_op_mode_subop(int op)
 347 {
 348         return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB;
 349 }
 350 static inline int ceph_osd_op_mode_read(int op)
 351 {
 352         return (op & CEPH_OSD_OP_MODE_RD) &&
 353                 op != CEPH_OSD_OP_CALL;
 354 }
 355 static inline int ceph_osd_op_mode_modify(int op)
 356 {
 357         return op & CEPH_OSD_OP_MODE_WR;
 358 }
 359
 360 /*
 361  * note that the following tmap stuff is also defined in the ceph librados.h
 362  * any modification here needs to be updated there
 363  */
 364 #define CEPH_OSD_TMAP_HDR 'h'
 365 #define CEPH_OSD_TMAP_SET 's'
 366 #define CEPH_OSD_TMAP_CREATE 'c' /* create key */
 367 #define CEPH_OSD_TMAP_RM  'r'
 368 #define CEPH_OSD_TMAP_RMSLOPPY 'R'
 369
 370 extern const char *ceph_osd_op_name(int op);
 371
 372 /*
 373  * osd op flags
 374  *
 375  * An op may be READ, WRITE, or READ|WRITE.
 376  */
 377 enum {
 378         CEPH_OSD_FLAG_ACK =            0x0001,  /* want (or is) "ack" ack */
 379         CEPH_OSD_FLAG_ONNVRAM =        0x0002,  /* want (or is) "onnvram" ack */
 380         CEPH_OSD_FLAG_ONDISK =         0x0004,  /* want (or is) "ondisk" ack */
 381         CEPH_OSD_FLAG_RETRY =          0x0008,  /* resend attempt */
 382         CEPH_OSD_FLAG_READ =           0x0010,  /* op may read */
 383         CEPH_OSD_FLAG_WRITE =          0x0020,  /* op may write */
 384         CEPH_OSD_FLAG_ORDERSNAP =      0x0040,  /* EOLDSNAP if snapc is out of order */
 385         CEPH_OSD_FLAG_PEERSTAT_OLD =   0x0080,  /* DEPRECATED msg includes osd_peer_stat */
 386         CEPH_OSD_FLAG_BALANCE_READS =  0x0100,
 387         CEPH_OSD_FLAG_PARALLELEXEC =   0x0200,  /* execute op in parallel */
 388         CEPH_OSD_FLAG_PGOP =           0x0400,  /* pg op, no object */
 389         CEPH_OSD_FLAG_EXEC =           0x0800,  /* op may exec */
 390         CEPH_OSD_FLAG_EXEC_PUBLIC =    0x1000,  /* DEPRECATED op may exec (public) */
 391         CEPH_OSD_FLAG_LOCALIZE_READS = 0x2000,  /* read from nearby replica, if any */
 392         CEPH_OSD_FLAG_RWORDERED =      0x4000,  /* order wrt concurrent reads */
 393         CEPH_OSD_FLAG_IGNORE_CACHE =   0x8000,  /* ignore cache logic */
 394         CEPH_OSD_FLAG_SKIPRWLOCKS =   0x10000,  /* skip rw locks */
 395         CEPH_OSD_FLAG_IGNORE_OVERLAY = 0x20000, /* ignore pool overlay */
 396         CEPH_OSD_FLAG_FLUSH =         0x40000,  /* this is part of flush */
 397         CEPH_OSD_FLAG_MAP_SNAP_CLONE = 0x80000,  /* map snap direct to clone id */
 398         CEPH_OSD_FLAG_ENFORCE_SNAPC   = 0x100000,  /* use snapc provided even if
 399                                                       pool uses pool snaps */
 400         CEPH_OSD_FLAG_REDIRECTED   = 0x200000,  /* op has been redirected */
 401         CEPH_OSD_FLAG_KNOWN_REDIR = 0x400000,  /* redirect bit is authoritative */
 402         CEPH_OSD_FLAG_FULL_TRY =    0x800000,  /* try op despite full flag */
 403         CEPH_OSD_FLAG_FULL_FORCE = 0x1000000,  /* force op despite full flag */
 404 };
 405
 406 enum {
 407         CEPH_OSD_OP_FLAG_EXCL = 1,      /* EXCL object create */
 408         CEPH_OSD_OP_FLAG_FAILOK = 2,    /* continue despite failure */
 409 };
 410
 411 #define EOLDSNAPC    ERESTART  /* ORDERSNAP flag set; writer has old snapc*/
 412 #define EBLACKLISTED ESHUTDOWN /* blacklisted */
 413
 414 /* xattr comparison */
 415 enum {
 416         CEPH_OSD_CMPXATTR_OP_NOP = 0,
 417         CEPH_OSD_CMPXATTR_OP_EQ  = 1,
 418         CEPH_OSD_CMPXATTR_OP_NE  = 2,
 419         CEPH_OSD_CMPXATTR_OP_GT  = 3,
 420         CEPH_OSD_CMPXATTR_OP_GTE = 4,
 421         CEPH_OSD_CMPXATTR_OP_LT  = 5,
 422         CEPH_OSD_CMPXATTR_OP_LTE = 6
 423 };
 424
 425 enum {
 426         CEPH_OSD_CMPXATTR_MODE_STRING = 1,
 427         CEPH_OSD_CMPXATTR_MODE_U64    = 2
 428 };
 429
 430 enum {
 431         CEPH_OSD_WATCH_OP_UNWATCH = 0,
 432         CEPH_OSD_WATCH_OP_LEGACY_WATCH = 1,
 433         /* note: use only ODD ids to prevent pre-giant code from
 434            interpreting the op as UNWATCH */
 435         CEPH_OSD_WATCH_OP_WATCH = 3,
 436         CEPH_OSD_WATCH_OP_RECONNECT = 5,
 437         CEPH_OSD_WATCH_OP_PING = 7,
 438 };
 439
 440 const char *ceph_osd_watch_op_name(int o);
 441
 442 enum {
 443         CEPH_OSD_BACKOFF_OP_BLOCK = 1,
 444         CEPH_OSD_BACKOFF_OP_ACK_BLOCK = 2,
 445         CEPH_OSD_BACKOFF_OP_UNBLOCK = 3,
 446 };
 447
 448 /*
 449  * an individual object operation.  each may be accompanied by some data
 450  * payload
 451  */
 452 struct ceph_osd_op {
 453         __le16 op;           /* CEPH_OSD_OP_* */
 454         __le32 flags;        /* CEPH_OSD_OP_FLAG_* */
 455         union {
 456                 struct {
 457                         __le64 offset, length;
 458                         __le64 truncate_size;
 459                         __le32 truncate_seq;
 460                 } __attribute__ ((packed)) extent;
 461                 struct {
 462                         __le32 name_len;
 463                         __le32 value_len;
 464                         __u8 cmp_op;       /* CEPH_OSD_CMPXATTR_OP_* */
 465                         __u8 cmp_mode;     /* CEPH_OSD_CMPXATTR_MODE_* */
 466                 } __attribute__ ((packed)) xattr;
 467                 struct {
 468                         __u8 class_len;
 469                         __u8 method_len;
 470                         __u8 argc;
 471                         __le32 indata_len;
 472                 } __attribute__ ((packed)) cls;
 473                 struct {
 474                         __le64 cookie, count;
 475                 } __attribute__ ((packed)) pgls;
 476                 struct {
 477                         __le64 snapid;
 478                 } __attribute__ ((packed)) snap;
 479                 struct {
 480                         __le64 cookie;
 481                         __le64 ver;     /* no longer used */
 482                         __u8 op;        /* CEPH_OSD_WATCH_OP_* */
 483                         __le32 gen;     /* registration generation */
 484                 } __attribute__ ((packed)) watch;
 485                 struct {
 486                         __le64 cookie;
 487                 } __attribute__ ((packed)) notify;
 488                 struct {
 489                         __le64 offset, length;
 490                         __le64 src_offset;
 491                 } __attribute__ ((packed)) clonerange;
 492                 struct {
 493                         __le64 expected_object_size;
 494                         __le64 expected_write_size;
 495                 } __attribute__ ((packed)) alloc_hint;
 496         };
 497         __le32 payload_len;
 498 } __attribute__ ((packed));
 499
 500
 501 #endif