LXR linux/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 */
  14struct ceph_fsid {
  15        unsigned char fsid[16];
  16};
  17
  18static 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 */
  27typedef __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
  32struct 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 */
  59struct 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 */
  97static 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 */
 108struct 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 */
 116struct 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
 131extern 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
 315enum {
 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
 321static inline int ceph_osd_op_type_lock(int op)
 322{
 323        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK;
 324}
 325static inline int ceph_osd_op_type_data(int op)
 326{
 327        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA;
 328}
 329static inline int ceph_osd_op_type_attr(int op)
 330{
 331        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR;
 332}
 333static inline int ceph_osd_op_type_exec(int op)
 334{
 335        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC;
 336}
 337static inline int ceph_osd_op_type_pg(int op)
 338{
 339        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG;
 340}
 341static inline int ceph_osd_op_type_multi(int op)
 342{
 343        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_MULTI;
 344}
 345
 346static inline int ceph_osd_op_mode_subop(int op)
 347{
 348        return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB;
 349}
 350static 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}
 355static 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
 370extern 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 */
 377enum {
 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
 406enum {
 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 */
 415enum {
 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
 425enum {
 426        CEPH_OSD_CMPXATTR_MODE_STRING = 1,
 427        CEPH_OSD_CMPXATTR_MODE_U64    = 2
 428};
 429
 430enum {
 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
 440const char *ceph_osd_watch_op_name(int o);
 441
 442/*
 443 * an individual object operation.  each may be accompanied by some data
 444 * payload
 445 */
 446struct ceph_osd_op {
 447        __le16 op;           /* CEPH_OSD_OP_* */
 448        __le32 flags;        /* CEPH_OSD_OP_FLAG_* */
 449        union {
 450                struct {
 451                        __le64 offset, length;
 452                        __le64 truncate_size;
 453                        __le32 truncate_seq;
 454                } __attribute__ ((packed)) extent;
 455                struct {
 456                        __le32 name_len;
 457                        __le32 value_len;
 458                        __u8 cmp_op;       /* CEPH_OSD_CMPXATTR_OP_* */
 459                        __u8 cmp_mode;     /* CEPH_OSD_CMPXATTR_MODE_* */
 460                } __attribute__ ((packed)) xattr;
 461                struct {
 462                        __u8 class_len;
 463                        __u8 method_len;
 464                        __u8 argc;
 465                        __le32 indata_len;
 466                } __attribute__ ((packed)) cls;
 467                struct {
 468                        __le64 cookie, count;
 469                } __attribute__ ((packed)) pgls;
 470                struct {
 471                        __le64 snapid;
 472                } __attribute__ ((packed)) snap;
 473                struct {
 474                        __le64 cookie;
 475                        __le64 ver;     /* no longer used */
 476                        __u8 op;        /* CEPH_OSD_WATCH_OP_* */
 477                        __le32 gen;     /* registration generation */
 478                } __attribute__ ((packed)) watch;
 479                struct {
 480                        __le64 cookie;
 481                } __attribute__ ((packed)) notify;
 482                struct {
 483                        __le64 offset, length;
 484                        __le64 src_offset;
 485                } __attribute__ ((packed)) clonerange;
 486                struct {
 487                        __le64 expected_object_size;
 488                        __le64 expected_write_size;
 489                } __attribute__ ((packed)) alloc_hint;
 490        };
 491        __le32 payload_len;
 492} __attribute__ ((packed));
 493
 494
 495#endif
 496