LXR linux/include/linux/ceph/rados.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef CEPH_RADOS_H
   3#define CEPH_RADOS_H
   4
   5/*
   6 * Data types for the Ceph distributed object storage layer RADOS
   7 * (Reliable Autonomic Distributed Object Store).
   8 */
   9
  10#include <linux/ceph/msgr.h>
  11
  12/*
  13 * fs id
  14 */
  15struct ceph_fsid {
  16        unsigned char fsid[16];
  17};
  18
  19static inline int ceph_fsid_compare(const struct ceph_fsid *a,
  20                                    const struct ceph_fsid *b)
  21{
  22        return memcmp(a, b, sizeof(*a));
  23}
  24
  25/*
  26 * ino, object, etc.
  27 */
  28typedef __le64 ceph_snapid_t;
  29#define CEPH_SNAPDIR ((__u64)(-1))  /* reserved for hidden .snap dir */
  30#define CEPH_NOSNAP  ((__u64)(-2))  /* "head", "live" revision */
  31#define CEPH_MAXSNAP ((__u64)(-3))  /* largest valid snapid */
  32
  33struct ceph_timespec {
  34        __le32 tv_sec;
  35        __le32 tv_nsec;
  36} __attribute__ ((packed));
  37
  38
  39/*
  40 * object layout - how objects are mapped into PGs
  41 */
  42#define CEPH_OBJECT_LAYOUT_HASH     1
  43#define CEPH_OBJECT_LAYOUT_LINEAR   2
  44#define CEPH_OBJECT_LAYOUT_HASHINO  3
  45
  46/*
  47 * pg layout -- how PGs are mapped onto (sets of) OSDs
  48 */
  49#define CEPH_PG_LAYOUT_CRUSH  0
  50#define CEPH_PG_LAYOUT_HASH   1
  51#define CEPH_PG_LAYOUT_LINEAR 2
  52#define CEPH_PG_LAYOUT_HYBRID 3
  53
  54#define CEPH_PG_MAX_SIZE      32  /* max # osds in a single pg */
  55
  56/*
  57 * placement group.
  58 * we encode this into one __le64.
  59 */
  60struct ceph_pg_v1 {
  61        __le16 preferred; /* preferred primary osd */
  62        __le16 ps;        /* placement seed */
  63        __le32 pool;      /* object pool */
  64} __attribute__ ((packed));
  65
  66/*
  67 * pg_pool is a set of pgs storing a pool of objects
  68 *
  69 *  pg_num -- base number of pseudorandomly placed pgs
  70 *
  71 *  pgp_num -- effective number when calculating pg placement.  this
  72 * is used for pg_num increases.  new pgs result in data being "split"
  73 * into new pgs.  for this to proceed smoothly, new pgs are intiially
  74 * colocated with their parents; that is, pgp_num doesn't increase
  75 * until the new pgs have successfully split.  only _then_ are the new
  76 * pgs placed independently.
  77 *
  78 *  lpg_num -- localized pg count (per device).  replicas are randomly
  79 * selected.
  80 *
  81 *  lpgp_num -- as above.
  82 */
  83#define CEPH_NOPOOL  ((__u64) (-1))  /* pool id not defined */
  84
  85#define CEPH_POOL_TYPE_REP     1
  86#define CEPH_POOL_TYPE_RAID4   2 /* never implemented */
  87#define CEPH_POOL_TYPE_EC      3
  88
  89/*
  90 * stable_mod func is used to control number of placement groups.
  91 * similar to straight-up modulo, but produces a stable mapping as b
  92 * increases over time.  b is the number of bins, and bmask is the
  93 * containing power of 2 minus 1.
  94 *
  95 * b <= bmask and bmask=(2**n)-1
  96 * e.g., b=12 -> bmask=15, b=123 -> bmask=127
  97 */
  98static inline int ceph_stable_mod(int x, int b, int bmask)
  99{
 100        if ((x & bmask) < b)
 101                return x & bmask;
 102        else
 103                return x & (bmask >> 1);
 104}
 105
 106/*
 107 * object layout - how a given object should be stored.
 108 */
 109struct ceph_object_layout {
 110        struct ceph_pg_v1 ol_pgid;   /* raw pg, with _full_ ps precision. */
 111        __le32 ol_stripe_unit;    /* for per-object parity, if any */
 112} __attribute__ ((packed));
 113
 114/*
 115 * compound epoch+version, used by storage layer to serialize mutations
 116 */
 117struct ceph_eversion {
 118        __le64 version;
 119        __le32 epoch;
 120} __attribute__ ((packed));
 121
 122/*
 123 * osd map bits
 124 */
 125
 126/* status bits */
 127#define CEPH_OSD_EXISTS  (1<<0)
 128#define CEPH_OSD_UP      (1<<1)
 129#define CEPH_OSD_AUTOOUT (1<<2)  /* osd was automatically marked out */
 130#define CEPH_OSD_NEW     (1<<3)  /* osd is new, never marked in */
 131
 132extern const char *ceph_osd_state_name(int s);
 133
 134/* osd weights.  fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
 135#define CEPH_OSD_IN  0x10000
 136#define CEPH_OSD_OUT 0
 137
 138/* osd primary-affinity.  fixed point value: 0x10000 == baseline */
 139#define CEPH_OSD_MAX_PRIMARY_AFFINITY 0x10000
 140#define CEPH_OSD_DEFAULT_PRIMARY_AFFINITY 0x10000
 141
 142
 143/*
 144 * osd map flag bits
 145 */
 146#define CEPH_OSDMAP_NEARFULL (1<<0)  /* sync writes (near ENOSPC) */
 147#define CEPH_OSDMAP_FULL     (1<<1)  /* no data writes (ENOSPC) */
 148#define CEPH_OSDMAP_PAUSERD  (1<<2)  /* pause all reads */
 149#define CEPH_OSDMAP_PAUSEWR  (1<<3)  /* pause all writes */
 150#define CEPH_OSDMAP_PAUSEREC (1<<4)  /* pause recovery */
 151#define CEPH_OSDMAP_NOUP     (1<<5)  /* block osd boot */
 152#define CEPH_OSDMAP_NODOWN   (1<<6)  /* block osd mark-down/failure */
 153#define CEPH_OSDMAP_NOOUT    (1<<7)  /* block osd auto mark-out */
 154#define CEPH_OSDMAP_NOIN     (1<<8)  /* block osd auto mark-in */
 155#define CEPH_OSDMAP_NOBACKFILL (1<<9) /* block osd backfill */
 156#define CEPH_OSDMAP_NORECOVER (1<<10) /* block osd recovery and backfill */
 157#define CEPH_OSDMAP_NOSCRUB  (1<<11) /* block periodic scrub */
 158#define CEPH_OSDMAP_NODEEP_SCRUB (1<<12) /* block periodic deep-scrub */
 159#define CEPH_OSDMAP_NOTIERAGENT (1<<13) /* disable tiering agent */
 160#define CEPH_OSDMAP_NOREBALANCE (1<<14) /* block osd backfill unless pg is degraded */
 161#define CEPH_OSDMAP_SORTBITWISE (1<<15) /* use bitwise hobject_t sort */
 162#define CEPH_OSDMAP_REQUIRE_JEWEL    (1<<16) /* require jewel for booting osds */
 163#define CEPH_OSDMAP_REQUIRE_KRAKEN   (1<<17) /* require kraken for booting osds */
 164#define CEPH_OSDMAP_REQUIRE_LUMINOUS (1<<18) /* require l for booting osds */
 165#define CEPH_OSDMAP_RECOVERY_DELETES (1<<19) /* deletes performed during recovery instead of peering */
 166
 167/*
 168 * The error code to return when an OSD can't handle a write
 169 * because it is too large.
 170 */
 171#define OSD_WRITETOOBIG EMSGSIZE
 172
 173/*
 174 * osd ops
 175 *
 176 * WARNING: do not use these op codes directly.  Use the helpers
 177 * defined below instead.  In certain cases, op code behavior was
 178 * redefined, resulting in special-cases in the helpers.
 179 */
 180#define CEPH_OSD_OP_MODE       0xf000
 181#define CEPH_OSD_OP_MODE_RD    0x1000
 182#define CEPH_OSD_OP_MODE_WR    0x2000
 183#define CEPH_OSD_OP_MODE_RMW   0x3000
 184#define CEPH_OSD_OP_MODE_SUB   0x4000
 185#define CEPH_OSD_OP_MODE_CACHE 0x8000
 186
 187#define CEPH_OSD_OP_TYPE       0x0f00
 188#define CEPH_OSD_OP_TYPE_LOCK  0x0100
 189#define CEPH_OSD_OP_TYPE_DATA  0x0200
 190#define CEPH_OSD_OP_TYPE_ATTR  0x0300
 191#define CEPH_OSD_OP_TYPE_EXEC  0x0400
 192#define CEPH_OSD_OP_TYPE_PG    0x0500
 193#define CEPH_OSD_OP_TYPE_MULTI 0x0600 /* multiobject */
 194
 195#define __CEPH_OSD_OP1(mode, nr) \
 196        (CEPH_OSD_OP_MODE_##mode | (nr))
 197
 198#define __CEPH_OSD_OP(mode, type, nr) \
 199        (CEPH_OSD_OP_MODE_##mode | CEPH_OSD_OP_TYPE_##type | (nr))
 200
 201#define __CEPH_FORALL_OSD_OPS(f)                                            \
 202        /** data **/                                                        \
 203        /* read */                                                          \
 204        f(READ,         __CEPH_OSD_OP(RD, DATA, 1),     "read")             \
 205        f(STAT,         __CEPH_OSD_OP(RD, DATA, 2),     "stat")             \
 206        f(MAPEXT,       __CEPH_OSD_OP(RD, DATA, 3),     "mapext")           \
 207                                                                            \
 208        /* fancy read */                                                    \
 209        f(MASKTRUNC,    __CEPH_OSD_OP(RD, DATA, 4),     "masktrunc")        \
 210        f(SPARSE_READ,  __CEPH_OSD_OP(RD, DATA, 5),     "sparse-read")      \
 211                                                                            \
 212        f(NOTIFY,       __CEPH_OSD_OP(RD, DATA, 6),     "notify")           \
 213        f(NOTIFY_ACK,   __CEPH_OSD_OP(RD, DATA, 7),     "notify-ack")       \
 214                                                                            \
 215        /* versioning */                                                    \
 216        f(ASSERT_VER,   __CEPH_OSD_OP(RD, DATA, 8),     "assert-version")   \
 217                                                                            \
 218        f(LIST_WATCHERS, __CEPH_OSD_OP(RD, DATA, 9),    "list-watchers")    \
 219                                                                            \
 220        f(LIST_SNAPS,   __CEPH_OSD_OP(RD, DATA, 10),    "list-snaps")       \
 221                                                                            \
 222        /* sync */                                                          \
 223        f(SYNC_READ,    __CEPH_OSD_OP(RD, DATA, 11),    "sync_read")        \
 224                                                                            \
 225        /* write */                                                         \
 226        f(WRITE,        __CEPH_OSD_OP(WR, DATA, 1),     "write")            \
 227        f(WRITEFULL,    __CEPH_OSD_OP(WR, DATA, 2),     "writefull")        \
 228        f(TRUNCATE,     __CEPH_OSD_OP(WR, DATA, 3),     "truncate")         \
 229        f(ZERO,         __CEPH_OSD_OP(WR, DATA, 4),     "zero")             \
 230        f(DELETE,       __CEPH_OSD_OP(WR, DATA, 5),     "delete")           \
 231                                                                            \
 232        /* fancy write */                                                   \
 233        f(APPEND,       __CEPH_OSD_OP(WR, DATA, 6),     "append")           \
 234        f(SETTRUNC,     __CEPH_OSD_OP(WR, DATA, 8),     "settrunc")         \
 235        f(TRIMTRUNC,    __CEPH_OSD_OP(WR, DATA, 9),     "trimtrunc")        \
 236                                                                            \
 237        f(TMAPUP,       __CEPH_OSD_OP(RMW, DATA, 10),   "tmapup")           \
 238        f(TMAPPUT,      __CEPH_OSD_OP(WR, DATA, 11),    "tmapput")          \
 239        f(TMAPGET,      __CEPH_OSD_OP(RD, DATA, 12),    "tmapget")          \
 240                                                                            \
 241        f(CREATE,       __CEPH_OSD_OP(WR, DATA, 13),    "create")           \
 242        f(ROLLBACK,     __CEPH_OSD_OP(WR, DATA, 14),    "rollback")         \
 243                                                                            \
 244        f(WATCH,        __CEPH_OSD_OP(WR, DATA, 15),    "watch")            \
 245                                                                            \
 246        /* omap */                                                          \
 247        f(OMAPGETKEYS,  __CEPH_OSD_OP(RD, DATA, 17),    "omap-get-keys")    \
 248        f(OMAPGETVALS,  __CEPH_OSD_OP(RD, DATA, 18),    "omap-get-vals")    \
 249        f(OMAPGETHEADER, __CEPH_OSD_OP(RD, DATA, 19),   "omap-get-header")  \
 250        f(OMAPGETVALSBYKEYS, __CEPH_OSD_OP(RD, DATA, 20), "omap-get-vals-by-keys") \
 251        f(OMAPSETVALS,  __CEPH_OSD_OP(WR, DATA, 21),    "omap-set-vals")    \
 252        f(OMAPSETHEADER, __CEPH_OSD_OP(WR, DATA, 22),   "omap-set-header")  \
 253        f(OMAPCLEAR,    __CEPH_OSD_OP(WR, DATA, 23),    "omap-clear")       \
 254        f(OMAPRMKEYS,   __CEPH_OSD_OP(WR, DATA, 24),    "omap-rm-keys")     \
 255        f(OMAP_CMP,     __CEPH_OSD_OP(RD, DATA, 25),    "omap-cmp")         \
 256                                                                            \
 257        /* tiering */                                                       \
 258        f(COPY_FROM,    __CEPH_OSD_OP(WR, DATA, 26),    "copy-from")        \
 259        f(COPY_GET_CLASSIC, __CEPH_OSD_OP(RD, DATA, 27), "copy-get-classic") \
 260        f(UNDIRTY,      __CEPH_OSD_OP(WR, DATA, 28),    "undirty")          \
 261        f(ISDIRTY,      __CEPH_OSD_OP(RD, DATA, 29),    "isdirty")          \
 262        f(COPY_GET,     __CEPH_OSD_OP(RD, DATA, 30),    "copy-get")         \
 263        f(CACHE_FLUSH,  __CEPH_OSD_OP(CACHE, DATA, 31), "cache-flush")      \
 264        f(CACHE_EVICT,  __CEPH_OSD_OP(CACHE, DATA, 32), "cache-evict")      \
 265        f(CACHE_TRY_FLUSH, __CEPH_OSD_OP(CACHE, DATA, 33), "cache-try-flush") \
 266                                                                            \
 267        /* convert tmap to omap */                                          \
 268        f(TMAP2OMAP,    __CEPH_OSD_OP(RMW, DATA, 34),   "tmap2omap")        \
 269                                                                            \
 270        /* hints */                                                         \
 271        f(SETALLOCHINT, __CEPH_OSD_OP(WR, DATA, 35),    "set-alloc-hint")   \
 272                                                                            \
 273        /** multi **/                                                       \
 274        f(CLONERANGE,   __CEPH_OSD_OP(WR, MULTI, 1),    "clonerange")       \
 275        f(ASSERT_SRC_VERSION, __CEPH_OSD_OP(RD, MULTI, 2), "assert-src-version") \
 276        f(SRC_CMPXATTR, __CEPH_OSD_OP(RD, MULTI, 3),    "src-cmpxattr")     \
 277                                                                            \
 278        /** attrs **/                                                       \
 279        /* read */                                                          \
 280        f(GETXATTR,     __CEPH_OSD_OP(RD, ATTR, 1),     "getxattr")         \
 281        f(GETXATTRS,    __CEPH_OSD_OP(RD, ATTR, 2),     "getxattrs")        \
 282        f(CMPXATTR,     __CEPH_OSD_OP(RD, ATTR, 3),     "cmpxattr")         \
 283                                                                            \
 284        /* write */                                                         \
 285        f(SETXATTR,     __CEPH_OSD_OP(WR, ATTR, 1),     "setxattr")         \
 286        f(SETXATTRS,    __CEPH_OSD_OP(WR, ATTR, 2),     "setxattrs")        \
 287        f(RESETXATTRS,  __CEPH_OSD_OP(WR, ATTR, 3),     "resetxattrs")      \
 288        f(RMXATTR,      __CEPH_OSD_OP(WR, ATTR, 4),     "rmxattr")          \
 289                                                                            \
 290        /** subop **/                                                       \
 291        f(PULL,         __CEPH_OSD_OP1(SUB, 1),         "pull")             \
 292        f(PUSH,         __CEPH_OSD_OP1(SUB, 2),         "push")             \
 293        f(BALANCEREADS, __CEPH_OSD_OP1(SUB, 3),         "balance-reads")    \
 294        f(UNBALANCEREADS, __CEPH_OSD_OP1(SUB, 4),       "unbalance-reads")  \
 295        f(SCRUB,        __CEPH_OSD_OP1(SUB, 5),         "scrub")            \
 296        f(SCRUB_RESERVE, __CEPH_OSD_OP1(SUB, 6),        "scrub-reserve")    \
 297        f(SCRUB_UNRESERVE, __CEPH_OSD_OP1(SUB, 7),      "scrub-unreserve")  \
 298        f(SCRUB_STOP,   __CEPH_OSD_OP1(SUB, 8),         "scrub-stop")       \
 299        f(SCRUB_MAP,    __CEPH_OSD_OP1(SUB, 9),         "scrub-map")        \
 300                                                                            \
 301        /** lock **/                                                        \
 302        f(WRLOCK,       __CEPH_OSD_OP(WR, LOCK, 1),     "wrlock")           \
 303        f(WRUNLOCK,     __CEPH_OSD_OP(WR, LOCK, 2),     "wrunlock")         \
 304        f(RDLOCK,       __CEPH_OSD_OP(WR, LOCK, 3),     "rdlock")           \
 305        f(RDUNLOCK,     __CEPH_OSD_OP(WR, LOCK, 4),     "rdunlock")         \
 306        f(UPLOCK,       __CEPH_OSD_OP(WR, LOCK, 5),     "uplock")           \
 307        f(DNLOCK,       __CEPH_OSD_OP(WR, LOCK, 6),     "dnlock")           \
 308                                                                            \
 309        /** exec **/                                                        \
 310        /* note: the RD bit here is wrong; see special-case below in helper */ \
 311        f(CALL,         __CEPH_OSD_OP(RD, EXEC, 1),     "call")             \
 312                                                                            \
 313        /** pg **/                                                          \
 314        f(PGLS,         __CEPH_OSD_OP(RD, PG, 1),       "pgls")             \
 315        f(PGLS_FILTER,  __CEPH_OSD_OP(RD, PG, 2),       "pgls-filter")      \
 316        f(PG_HITSET_LS, __CEPH_OSD_OP(RD, PG, 3),       "pg-hitset-ls")     \
 317        f(PG_HITSET_GET, __CEPH_OSD_OP(RD, PG, 4),      "pg-hitset-get")
 318
 319enum {
 320#define GENERATE_ENUM_ENTRY(op, opcode, str)    CEPH_OSD_OP_##op = (opcode),
 321__CEPH_FORALL_OSD_OPS(GENERATE_ENUM_ENTRY)
 322#undef GENERATE_ENUM_ENTRY
 323};
 324
 325static inline int ceph_osd_op_type_lock(int op)
 326{
 327        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_LOCK;
 328}
 329static inline int ceph_osd_op_type_data(int op)
 330{
 331        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_DATA;
 332}
 333static inline int ceph_osd_op_type_attr(int op)
 334{
 335        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_ATTR;
 336}
 337static inline int ceph_osd_op_type_exec(int op)
 338{
 339        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_EXEC;
 340}
 341static inline int ceph_osd_op_type_pg(int op)
 342{
 343        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_PG;
 344}
 345static inline int ceph_osd_op_type_multi(int op)
 346{
 347        return (op & CEPH_OSD_OP_TYPE) == CEPH_OSD_OP_TYPE_MULTI;
 348}
 349
 350static inline int ceph_osd_op_mode_subop(int op)
 351{
 352        return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_SUB;
 353}
 354static inline int ceph_osd_op_mode_read(int op)
 355{
 356        return (op & CEPH_OSD_OP_MODE_RD) &&
 357                op != CEPH_OSD_OP_CALL;
 358}
 359static inline int ceph_osd_op_mode_modify(int op)
 360{
 361        return op & CEPH_OSD_OP_MODE_WR;
 362}
 363
 364/*
 365 * note that the following tmap stuff is also defined in the ceph librados.h
 366 * any modification here needs to be updated there
 367 */
 368#define CEPH_OSD_TMAP_HDR 'h'
 369#define CEPH_OSD_TMAP_SET 's'
 370#define CEPH_OSD_TMAP_CREATE 'c' /* create key */
 371#define CEPH_OSD_TMAP_RM  'r'
 372#define CEPH_OSD_TMAP_RMSLOPPY 'R'
 373
 374extern const char *ceph_osd_op_name(int op);
 375
 376/*
 377 * osd op flags
 378 *
 379 * An op may be READ, WRITE, or READ|WRITE.
 380 */
 381enum {
 382        CEPH_OSD_FLAG_ACK =            0x0001,  /* want (or is) "ack" ack */
 383        CEPH_OSD_FLAG_ONNVRAM =        0x0002,  /* want (or is) "onnvram" ack */
 384        CEPH_OSD_FLAG_ONDISK =         0x0004,  /* want (or is) "ondisk" ack */
 385        CEPH_OSD_FLAG_RETRY =          0x0008,  /* resend attempt */
 386        CEPH_OSD_FLAG_READ =           0x0010,  /* op may read */
 387        CEPH_OSD_FLAG_WRITE =          0x0020,  /* op may write */
 388        CEPH_OSD_FLAG_ORDERSNAP =      0x0040,  /* EOLDSNAP if snapc is out of order */
 389        CEPH_OSD_FLAG_PEERSTAT_OLD =   0x0080,  /* DEPRECATED msg includes osd_peer_stat */
 390        CEPH_OSD_FLAG_BALANCE_READS =  0x0100,
 391        CEPH_OSD_FLAG_PARALLELEXEC =   0x0200,  /* execute op in parallel */
 392        CEPH_OSD_FLAG_PGOP =           0x0400,  /* pg op, no object */
 393        CEPH_OSD_FLAG_EXEC =           0x0800,  /* op may exec */
 394        CEPH_OSD_FLAG_EXEC_PUBLIC =    0x1000,  /* DEPRECATED op may exec (public) */
 395        CEPH_OSD_FLAG_LOCALIZE_READS = 0x2000,  /* read from nearby replica, if any */
 396        CEPH_OSD_FLAG_RWORDERED =      0x4000,  /* order wrt concurrent reads */
 397        CEPH_OSD_FLAG_IGNORE_CACHE =   0x8000,  /* ignore cache logic */
 398        CEPH_OSD_FLAG_SKIPRWLOCKS =   0x10000,  /* skip rw locks */
 399        CEPH_OSD_FLAG_IGNORE_OVERLAY = 0x20000, /* ignore pool overlay */
 400        CEPH_OSD_FLAG_FLUSH =         0x40000,  /* this is part of flush */
 401        CEPH_OSD_FLAG_MAP_SNAP_CLONE = 0x80000,  /* map snap direct to clone id */
 402        CEPH_OSD_FLAG_ENFORCE_SNAPC   = 0x100000,  /* use snapc provided even if
 403                                                      pool uses pool snaps */
 404        CEPH_OSD_FLAG_REDIRECTED   = 0x200000,  /* op has been redirected */
 405        CEPH_OSD_FLAG_KNOWN_REDIR = 0x400000,  /* redirect bit is authoritative */
 406        CEPH_OSD_FLAG_FULL_TRY =    0x800000,  /* try op despite full flag */
 407        CEPH_OSD_FLAG_FULL_FORCE = 0x1000000,  /* force op despite full flag */
 408};
 409
 410enum {
 411        CEPH_OSD_OP_FLAG_EXCL = 1,      /* EXCL object create */
 412        CEPH_OSD_OP_FLAG_FAILOK = 2,    /* continue despite failure */
 413        CEPH_OSD_OP_FLAG_FADVISE_RANDOM     = 0x4, /* the op is random */
 414        CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL = 0x8, /* the op is sequential */
 415        CEPH_OSD_OP_FLAG_FADVISE_WILLNEED   = 0x10,/* data will be accessed in
 416                                                      the near future */
 417        CEPH_OSD_OP_FLAG_FADVISE_DONTNEED   = 0x20,/* data will not be accessed
 418                                                      in the near future */
 419        CEPH_OSD_OP_FLAG_FADVISE_NOCACHE    = 0x40,/* data will be accessed only
 420                                                      once by this client */
 421};
 422
 423#define EOLDSNAPC    ERESTART  /* ORDERSNAP flag set; writer has old snapc*/
 424#define EBLACKLISTED ESHUTDOWN /* blacklisted */
 425
 426/* xattr comparison */
 427enum {
 428        CEPH_OSD_CMPXATTR_OP_NOP = 0,
 429        CEPH_OSD_CMPXATTR_OP_EQ  = 1,
 430        CEPH_OSD_CMPXATTR_OP_NE  = 2,
 431        CEPH_OSD_CMPXATTR_OP_GT  = 3,
 432        CEPH_OSD_CMPXATTR_OP_GTE = 4,
 433        CEPH_OSD_CMPXATTR_OP_LT  = 5,
 434        CEPH_OSD_CMPXATTR_OP_LTE = 6
 435};
 436
 437enum {
 438        CEPH_OSD_CMPXATTR_MODE_STRING = 1,
 439        CEPH_OSD_CMPXATTR_MODE_U64    = 2
 440};
 441
 442enum {
 443        CEPH_OSD_COPY_FROM_FLAG_FLUSH = 1,       /* part of a flush operation */
 444        CEPH_OSD_COPY_FROM_FLAG_IGNORE_OVERLAY = 2, /* ignore pool overlay */
 445        CEPH_OSD_COPY_FROM_FLAG_IGNORE_CACHE = 4,   /* ignore osd cache logic */
 446        CEPH_OSD_COPY_FROM_FLAG_MAP_SNAP_CLONE = 8, /* map snap direct to
 447                                                     * cloneid */
 448        CEPH_OSD_COPY_FROM_FLAG_RWORDERED = 16,     /* order with write */
 449};
 450
 451enum {
 452        CEPH_OSD_WATCH_OP_UNWATCH = 0,
 453        CEPH_OSD_WATCH_OP_LEGACY_WATCH = 1,
 454        /* note: use only ODD ids to prevent pre-giant code from
 455           interpreting the op as UNWATCH */
 456        CEPH_OSD_WATCH_OP_WATCH = 3,
 457        CEPH_OSD_WATCH_OP_RECONNECT = 5,
 458        CEPH_OSD_WATCH_OP_PING = 7,
 459};
 460
 461const char *ceph_osd_watch_op_name(int o);
 462
 463enum {
 464        CEPH_OSD_BACKOFF_OP_BLOCK = 1,
 465        CEPH_OSD_BACKOFF_OP_ACK_BLOCK = 2,
 466        CEPH_OSD_BACKOFF_OP_UNBLOCK = 3,
 467};
 468
 469/*
 470 * an individual object operation.  each may be accompanied by some data
 471 * payload
 472 */
 473struct ceph_osd_op {
 474        __le16 op;           /* CEPH_OSD_OP_* */
 475        __le32 flags;        /* CEPH_OSD_OP_FLAG_* */
 476        union {
 477                struct {
 478                        __le64 offset, length;
 479                        __le64 truncate_size;
 480                        __le32 truncate_seq;
 481                } __attribute__ ((packed)) extent;
 482                struct {
 483                        __le32 name_len;
 484                        __le32 value_len;
 485                        __u8 cmp_op;       /* CEPH_OSD_CMPXATTR_OP_* */
 486                        __u8 cmp_mode;     /* CEPH_OSD_CMPXATTR_MODE_* */
 487                } __attribute__ ((packed)) xattr;
 488                struct {
 489                        __u8 class_len;
 490                        __u8 method_len;
 491                        __u8 argc;
 492                        __le32 indata_len;
 493                } __attribute__ ((packed)) cls;
 494                struct {
 495                        __le64 cookie, count;
 496                } __attribute__ ((packed)) pgls;
 497                struct {
 498                        __le64 snapid;
 499                } __attribute__ ((packed)) snap;
 500                struct {
 501                        __le64 cookie;
 502                        __le64 ver;     /* no longer used */
 503                        __u8 op;        /* CEPH_OSD_WATCH_OP_* */
 504                        __le32 gen;     /* registration generation */
 505                } __attribute__ ((packed)) watch;
 506                struct {
 507                        __le64 cookie;
 508                } __attribute__ ((packed)) notify;
 509                struct {
 510                        __le64 offset, length;
 511                        __le64 src_offset;
 512                } __attribute__ ((packed)) clonerange;
 513                struct {
 514                        __le64 expected_object_size;
 515                        __le64 expected_write_size;
 516                } __attribute__ ((packed)) alloc_hint;
 517                struct {
 518                        __le64 snapid;
 519                        __le64 src_version;
 520                        __u8 flags; /* CEPH_OSD_COPY_FROM_FLAG_* */
 521                        /*
 522                         * CEPH_OSD_OP_FLAG_FADVISE_*: fadvise flags
 523                         * for src object, flags for dest object are in
 524                         * ceph_osd_op::flags.
 525                         */
 526                        __le32 src_fadvise_flags;
 527                } __attribute__ ((packed)) copy_from;
 528        };
 529        __le32 payload_len;
 530} __attribute__ ((packed));
 531
 532
 533#endif
 534