include/linux/ceph/ceph_fs.h

   1 /*
   2  * ceph_fs.h - Ceph constants and data types to share between kernel and
   3  * user space.
   4  *
   5  * Most types in this file are defined as little-endian, and are
   6  * primarily intended to describe data structures that pass over the
   7  * wire or that are stored on disk.
   8  *
   9  * LGPL2
  10  */
  11
  12 #ifndef CEPH_FS_H
  13 #define CEPH_FS_H
  14
  15 #include <linux/ceph/msgr.h>
  16 #include <linux/ceph/rados.h>
  17
  18 /*
  19  * subprotocol versions.  when specific messages types or high-level
  20  * protocols change, bump the affected components.  we keep rev
  21  * internal cluster protocols separately from the public,
  22  * client-facing protocol.
  23  */
  24 #define CEPH_OSD_PROTOCOL     8 /* cluster internal */
  25 #define CEPH_MDS_PROTOCOL    12 /* cluster internal */
  26 #define CEPH_MON_PROTOCOL     5 /* cluster internal */
  27 #define CEPH_OSDC_PROTOCOL   24 /* server/client */
  28 #define CEPH_MDSC_PROTOCOL   32 /* server/client */
  29 #define CEPH_MONC_PROTOCOL   15 /* server/client */
  30
  31
  32 #define CEPH_INO_ROOT  1
  33 #define CEPH_INO_CEPH  2        /* hidden .ceph dir */
  34
  35 /* arbitrary limit on max # of monitors (cluster of 3 is typical) */
  36 #define CEPH_MAX_MON   31
  37
  38 /*
  39  * ceph_file_layout - describe data layout for a file/inode
  40  */
  41 struct ceph_file_layout {
  42         /* file -> object mapping */
  43         __le32 fl_stripe_unit;     /* stripe unit, in bytes.  must be multiple
  44                                       of page size. */
  45         __le32 fl_stripe_count;    /* over this many objects */
  46         __le32 fl_object_size;     /* until objects are this big, then move to
  47                                       new objects */
  48         __le32 fl_cas_hash;        /* UNUSED.  0 = none; 1 = sha256 */
  49
  50         /* pg -> disk layout */
  51         __le32 fl_object_stripe_unit;  /* UNUSED.  for per-object parity, if any */
  52
  53         /* object -> pg layout */
  54         __le32 fl_unused;       /* unused; used to be preferred primary (-1) */
  55         __le32 fl_pg_pool;      /* namespace, crush ruleset, rep level */
  56 } __attribute__ ((packed));
  57
  58 #define CEPH_MIN_STRIPE_UNIT 65536
  59
  60 int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
  61
  62 struct ceph_dir_layout {
  63         __u8   dl_dir_hash;   /* see ceph_hash.h for ids */
  64         __u8   dl_unused1;
  65         __u16  dl_unused2;
  66         __u32  dl_unused3;
  67 } __attribute__ ((packed));
  68
  69 /* crypto algorithms */
  70 #define CEPH_CRYPTO_NONE 0x0
  71 #define CEPH_CRYPTO_AES  0x1
  72
  73 #define CEPH_AES_IV "cephsageyudagreg"
  74
  75 /* security/authentication protocols */
  76 #define CEPH_AUTH_UNKNOWN       0x0
  77 #define CEPH_AUTH_NONE          0x1
  78 #define CEPH_AUTH_CEPHX         0x2
  79
  80 #define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
  81
  82
  83 /*********************************************
  84  * message layer
  85  */
  86
  87 /*
  88  * message types
  89  */
  90
  91 /* misc */
  92 #define CEPH_MSG_SHUTDOWN               1
  93 #define CEPH_MSG_PING                   2
  94
  95 /* client <-> monitor */
  96 #define CEPH_MSG_MON_MAP                4
  97 #define CEPH_MSG_MON_GET_MAP            5
  98 #define CEPH_MSG_STATFS                 13
  99 #define CEPH_MSG_STATFS_REPLY           14
 100 #define CEPH_MSG_MON_SUBSCRIBE          15
 101 #define CEPH_MSG_MON_SUBSCRIBE_ACK      16
 102 #define CEPH_MSG_AUTH                   17
 103 #define CEPH_MSG_AUTH_REPLY             18
 104
 105 /* client <-> mds */
 106 #define CEPH_MSG_MDS_MAP                21
 107
 108 #define CEPH_MSG_CLIENT_SESSION         22
 109 #define CEPH_MSG_CLIENT_RECONNECT       23
 110
 111 #define CEPH_MSG_CLIENT_REQUEST         24
 112 #define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
 113 #define CEPH_MSG_CLIENT_REPLY           26
 114 #define CEPH_MSG_CLIENT_CAPS            0x310
 115 #define CEPH_MSG_CLIENT_LEASE           0x311
 116 #define CEPH_MSG_CLIENT_SNAP            0x312
 117 #define CEPH_MSG_CLIENT_CAPRELEASE      0x313
 118
 119 /* pool ops */
 120 #define CEPH_MSG_POOLOP_REPLY           48
 121 #define CEPH_MSG_POOLOP                 49
 122
 123
 124 /* osd */
 125 #define CEPH_MSG_OSD_MAP                41
 126 #define CEPH_MSG_OSD_OP                 42
 127 #define CEPH_MSG_OSD_OPREPLY            43
 128 #define CEPH_MSG_WATCH_NOTIFY           44
 129
 130
 131 /* watch-notify operations */
 132 enum {
 133   WATCH_NOTIFY                          = 1, /* notifying watcher */
 134   WATCH_NOTIFY_COMPLETE                 = 2, /* notifier notified when done */
 135 };
 136
 137
 138 /* pool operations */
 139 enum {
 140   POOL_OP_CREATE                        = 0x01,
 141   POOL_OP_DELETE                        = 0x02,
 142   POOL_OP_AUID_CHANGE                   = 0x03,
 143   POOL_OP_CREATE_SNAP                   = 0x11,
 144   POOL_OP_DELETE_SNAP                   = 0x12,
 145   POOL_OP_CREATE_UNMANAGED_SNAP         = 0x21,
 146   POOL_OP_DELETE_UNMANAGED_SNAP         = 0x22,
 147 };
 148
 149 struct ceph_mon_request_header {
 150         __le64 have_version;
 151         __le16 session_mon;
 152         __le64 session_mon_tid;
 153 } __attribute__ ((packed));
 154
 155 struct ceph_mon_statfs {
 156         struct ceph_mon_request_header monhdr;
 157         struct ceph_fsid fsid;
 158 } __attribute__ ((packed));
 159
 160 struct ceph_statfs {
 161         __le64 kb, kb_used, kb_avail;
 162         __le64 num_objects;
 163 } __attribute__ ((packed));
 164
 165 struct ceph_mon_statfs_reply {
 166         struct ceph_fsid fsid;
 167         __le64 version;
 168         struct ceph_statfs st;
 169 } __attribute__ ((packed));
 170
 171 const char *ceph_pool_op_name(int op);
 172
 173 struct ceph_mon_poolop {
 174         struct ceph_mon_request_header monhdr;
 175         struct ceph_fsid fsid;
 176         __le32 pool;
 177         __le32 op;
 178         __le64 auid;
 179         __le64 snapid;
 180         __le32 name_len;
 181 } __attribute__ ((packed));
 182
 183 struct ceph_mon_poolop_reply {
 184         struct ceph_mon_request_header monhdr;
 185         struct ceph_fsid fsid;
 186         __le32 reply_code;
 187         __le32 epoch;
 188         char has_data;
 189         char data[0];
 190 } __attribute__ ((packed));
 191
 192 struct ceph_mon_unmanaged_snap {
 193         __le64 snapid;
 194 } __attribute__ ((packed));
 195
 196 struct ceph_osd_getmap {
 197         struct ceph_mon_request_header monhdr;
 198         struct ceph_fsid fsid;
 199         __le32 start;
 200 } __attribute__ ((packed));
 201
 202 struct ceph_mds_getmap {
 203         struct ceph_mon_request_header monhdr;
 204         struct ceph_fsid fsid;
 205 } __attribute__ ((packed));
 206
 207 struct ceph_client_mount {
 208         struct ceph_mon_request_header monhdr;
 209 } __attribute__ ((packed));
 210
 211 #define CEPH_SUBSCRIBE_ONETIME    1  /* i want only 1 update after have */
 212
 213 struct ceph_mon_subscribe_item {
 214         __le64 have_version;    __le64 have;
 215         __u8 onetime;
 216 } __attribute__ ((packed));
 217
 218 struct ceph_mon_subscribe_ack {
 219         __le32 duration;         /* seconds */
 220         struct ceph_fsid fsid;
 221 } __attribute__ ((packed));
 222
 223 /*
 224  * mds states
 225  *   > 0 -> in
 226  *  <= 0 -> out
 227  */
 228 #define CEPH_MDS_STATE_DNE          0  /* down, does not exist. */
 229 #define CEPH_MDS_STATE_STOPPED     -1  /* down, once existed, but no subtrees.
 230                                           empty log. */
 231 #define CEPH_MDS_STATE_BOOT        -4  /* up, boot announcement. */
 232 #define CEPH_MDS_STATE_STANDBY     -5  /* up, idle.  waiting for assignment. */
 233 #define CEPH_MDS_STATE_CREATING    -6  /* up, creating MDS instance. */
 234 #define CEPH_MDS_STATE_STARTING    -7  /* up, starting previously stopped mds */
 235 #define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
 236
 237 #define CEPH_MDS_STATE_REPLAY       8  /* up, replaying journal. */
 238 #define CEPH_MDS_STATE_RESOLVE      9  /* up, disambiguating distributed
 239                                           operations (import, rename, etc.) */
 240 #define CEPH_MDS_STATE_RECONNECT    10 /* up, reconnect to clients */
 241 #define CEPH_MDS_STATE_REJOIN       11 /* up, rejoining distributed cache */
 242 #define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
 243 #define CEPH_MDS_STATE_ACTIVE       13 /* up, active */
 244 #define CEPH_MDS_STATE_STOPPING     14 /* up, but exporting metadata */
 245
 246 extern const char *ceph_mds_state_name(int s);
 247
 248
 249 /*
 250  * metadata lock types.
 251  *  - these are bitmasks.. we can compose them
 252  *  - they also define the lock ordering by the MDS
 253  *  - a few of these are internal to the mds
 254  */
 255 #define CEPH_LOCK_DVERSION    1
 256 #define CEPH_LOCK_DN          2
 257 #define CEPH_LOCK_ISNAP       16
 258 #define CEPH_LOCK_IVERSION    32    /* mds internal */
 259 #define CEPH_LOCK_IFILE       64
 260 #define CEPH_LOCK_IAUTH       128
 261 #define CEPH_LOCK_ILINK       256
 262 #define CEPH_LOCK_IDFT        512   /* dir frag tree */
 263 #define CEPH_LOCK_INEST       1024  /* mds internal */
 264 #define CEPH_LOCK_IXATTR      2048
 265 #define CEPH_LOCK_IFLOCK      4096  /* advisory file locks */
 266 #define CEPH_LOCK_INO         8192  /* immutable inode bits; not a lock */
 267
 268 /* client_session ops */
 269 enum {
 270         CEPH_SESSION_REQUEST_OPEN,
 271         CEPH_SESSION_OPEN,
 272         CEPH_SESSION_REQUEST_CLOSE,
 273         CEPH_SESSION_CLOSE,
 274         CEPH_SESSION_REQUEST_RENEWCAPS,
 275         CEPH_SESSION_RENEWCAPS,
 276         CEPH_SESSION_STALE,
 277         CEPH_SESSION_RECALL_STATE,
 278 };
 279
 280 extern const char *ceph_session_op_name(int op);
 281
 282 struct ceph_mds_session_head {
 283         __le32 op;
 284         __le64 seq;
 285         struct ceph_timespec stamp;
 286         __le32 max_caps, max_leases;
 287 } __attribute__ ((packed));
 288
 289 /* client_request */
 290 /*
 291  * metadata ops.
 292  *  & 0x001000 -> write op
 293  *  & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
 294  &  & 0x100000 -> use weird ino/path trace
 295  */
 296 #define CEPH_MDS_OP_WRITE        0x001000
 297 enum {
 298         CEPH_MDS_OP_LOOKUP     = 0x00100,
 299         CEPH_MDS_OP_GETATTR    = 0x00101,
 300         CEPH_MDS_OP_LOOKUPHASH = 0x00102,
 301         CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
 302         CEPH_MDS_OP_LOOKUPINO  = 0x00104,
 303
 304         CEPH_MDS_OP_SETXATTR   = 0x01105,
 305         CEPH_MDS_OP_RMXATTR    = 0x01106,
 306         CEPH_MDS_OP_SETLAYOUT  = 0x01107,
 307         CEPH_MDS_OP_SETATTR    = 0x01108,
 308         CEPH_MDS_OP_SETFILELOCK= 0x01109,
 309         CEPH_MDS_OP_GETFILELOCK= 0x00110,
 310         CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
 311
 312         CEPH_MDS_OP_MKNOD      = 0x01201,
 313         CEPH_MDS_OP_LINK       = 0x01202,
 314         CEPH_MDS_OP_UNLINK     = 0x01203,
 315         CEPH_MDS_OP_RENAME     = 0x01204,
 316         CEPH_MDS_OP_MKDIR      = 0x01220,
 317         CEPH_MDS_OP_RMDIR      = 0x01221,
 318         CEPH_MDS_OP_SYMLINK    = 0x01222,
 319
 320         CEPH_MDS_OP_CREATE     = 0x01301,
 321         CEPH_MDS_OP_OPEN       = 0x00302,
 322         CEPH_MDS_OP_READDIR    = 0x00305,
 323
 324         CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
 325         CEPH_MDS_OP_MKSNAP     = 0x01400,
 326         CEPH_MDS_OP_RMSNAP     = 0x01401,
 327         CEPH_MDS_OP_LSSNAP     = 0x00402,
 328 };
 329
 330 extern const char *ceph_mds_op_name(int op);
 331
 332
 333 #define CEPH_SETATTR_MODE   1
 334 #define CEPH_SETATTR_UID    2
 335 #define CEPH_SETATTR_GID    4
 336 #define CEPH_SETATTR_MTIME  8
 337 #define CEPH_SETATTR_ATIME 16
 338 #define CEPH_SETATTR_SIZE  32
 339 #define CEPH_SETATTR_CTIME 64
 340
 341 union ceph_mds_request_args {
 342         struct {
 343                 __le32 mask;                 /* CEPH_CAP_* */
 344         } __attribute__ ((packed)) getattr;
 345         struct {
 346                 __le32 mode;
 347                 __le32 uid;
 348                 __le32 gid;
 349                 struct ceph_timespec mtime;
 350                 struct ceph_timespec atime;
 351                 __le64 size, old_size;       /* old_size needed by truncate */
 352                 __le32 mask;                 /* CEPH_SETATTR_* */
 353         } __attribute__ ((packed)) setattr;
 354         struct {
 355                 __le32 frag;                 /* which dir fragment */
 356                 __le32 max_entries;          /* how many dentries to grab */
 357                 __le32 max_bytes;
 358         } __attribute__ ((packed)) readdir;
 359         struct {
 360                 __le32 mode;
 361                 __le32 rdev;
 362         } __attribute__ ((packed)) mknod;
 363         struct {
 364                 __le32 mode;
 365         } __attribute__ ((packed)) mkdir;
 366         struct {
 367                 __le32 flags;
 368                 __le32 mode;
 369                 __le32 stripe_unit;          /* layout for newly created file */
 370                 __le32 stripe_count;         /* ... */
 371                 __le32 object_size;
 372                 __le32 file_replication;
 373                 __le32 unused;               /* used to be preferred osd */
 374         } __attribute__ ((packed)) open;
 375         struct {
 376                 __le32 flags;
 377         } __attribute__ ((packed)) setxattr;
 378         struct {
 379                 struct ceph_file_layout layout;
 380         } __attribute__ ((packed)) setlayout;
 381         struct {
 382                 __u8 rule; /* currently fcntl or flock */
 383                 __u8 type; /* shared, exclusive, remove*/
 384                 __le64 pid; /* process id requesting the lock */
 385                 __le64 pid_namespace;
 386                 __le64 start; /* initial location to lock */
 387                 __le64 length; /* num bytes to lock from start */
 388                 __u8 wait; /* will caller wait for lock to become available? */
 389         } __attribute__ ((packed)) filelock_change;
 390 } __attribute__ ((packed));
 391
 392 #define CEPH_MDS_FLAG_REPLAY        1  /* this is a replayed op */
 393 #define CEPH_MDS_FLAG_WANT_DENTRY   2  /* want dentry in reply */
 394
 395 struct ceph_mds_request_head {
 396         __le64 oldest_client_tid;
 397         __le32 mdsmap_epoch;           /* on client */
 398         __le32 flags;                  /* CEPH_MDS_FLAG_* */
 399         __u8 num_retry, num_fwd;       /* count retry, fwd attempts */
 400         __le16 num_releases;           /* # include cap/lease release records */
 401         __le32 op;                     /* mds op code */
 402         __le32 caller_uid, caller_gid;
 403         __le64 ino;                    /* use this ino for openc, mkdir, mknod,
 404                                           etc. (if replaying) */
 405         union ceph_mds_request_args args;
 406 } __attribute__ ((packed));
 407
 408 /* cap/lease release record */
 409 struct ceph_mds_request_release {
 410         __le64 ino, cap_id;            /* ino and unique cap id */
 411         __le32 caps, wanted;           /* new issued, wanted */
 412         __le32 seq, issue_seq, mseq;
 413         __le32 dname_seq;              /* if releasing a dentry lease, a */
 414         __le32 dname_len;              /* string follows. */
 415 } __attribute__ ((packed));
 416
 417 /* client reply */
 418 struct ceph_mds_reply_head {
 419         __le32 op;
 420         __le32 result;
 421         __le32 mdsmap_epoch;
 422         __u8 safe;                     /* true if committed to disk */
 423         __u8 is_dentry, is_target;     /* true if dentry, target inode records
 424                                           are included with reply */
 425 } __attribute__ ((packed));
 426
 427 /* one for each node split */
 428 struct ceph_frag_tree_split {
 429         __le32 frag;                   /* this frag splits... */
 430         __le32 by;                     /* ...by this many bits */
 431 } __attribute__ ((packed));
 432
 433 struct ceph_frag_tree_head {
 434         __le32 nsplits;                /* num ceph_frag_tree_split records */
 435         struct ceph_frag_tree_split splits[];
 436 } __attribute__ ((packed));
 437
 438 /* capability issue, for bundling with mds reply */
 439 struct ceph_mds_reply_cap {
 440         __le32 caps, wanted;           /* caps issued, wanted */
 441         __le64 cap_id;
 442         __le32 seq, mseq;
 443         __le64 realm;                  /* snap realm */
 444         __u8 flags;                    /* CEPH_CAP_FLAG_* */
 445 } __attribute__ ((packed));
 446
 447 #define CEPH_CAP_FLAG_AUTH  1          /* cap is issued by auth mds */
 448
 449 /* inode record, for bundling with mds reply */
 450 struct ceph_mds_reply_inode {
 451         __le64 ino;
 452         __le64 snapid;
 453         __le32 rdev;
 454         __le64 version;                /* inode version */
 455         __le64 xattr_version;          /* version for xattr blob */
 456         struct ceph_mds_reply_cap cap; /* caps issued for this inode */
 457         struct ceph_file_layout layout;
 458         struct ceph_timespec ctime, mtime, atime;
 459         __le32 time_warp_seq;
 460         __le64 size, max_size, truncate_size;
 461         __le32 truncate_seq;
 462         __le32 mode, uid, gid;
 463         __le32 nlink;
 464         __le64 files, subdirs, rbytes, rfiles, rsubdirs;  /* dir stats */
 465         struct ceph_timespec rctime;
 466         struct ceph_frag_tree_head fragtree;  /* (must be at end of struct) */
 467 } __attribute__ ((packed));
 468 /* followed by frag array, symlink string, dir layout, xattr blob */
 469
 470 /* reply_lease follows dname, and reply_inode */
 471 struct ceph_mds_reply_lease {
 472         __le16 mask;            /* lease type(s) */
 473         __le32 duration_ms;     /* lease duration */
 474         __le32 seq;
 475 } __attribute__ ((packed));
 476
 477 struct ceph_mds_reply_dirfrag {
 478         __le32 frag;            /* fragment */
 479         __le32 auth;            /* auth mds, if this is a delegation point */
 480         __le32 ndist;           /* number of mds' this is replicated on */
 481         __le32 dist[];
 482 } __attribute__ ((packed));
 483
 484 #define CEPH_LOCK_FCNTL    1
 485 #define CEPH_LOCK_FLOCK    2
 486
 487 #define CEPH_LOCK_SHARED   1
 488 #define CEPH_LOCK_EXCL     2
 489 #define CEPH_LOCK_UNLOCK   4
 490
 491 struct ceph_filelock {
 492         __le64 start;/* file offset to start lock at */
 493         __le64 length; /* num bytes to lock; 0 for all following start */
 494         __le64 client; /* which client holds the lock */
 495         __le64 pid; /* process id holding the lock on the client */
 496         __le64 pid_namespace;
 497         __u8 type; /* shared lock, exclusive lock, or unlock */
 498 } __attribute__ ((packed));
 499
 500
 501 /* file access modes */
 502 #define CEPH_FILE_MODE_PIN        0
 503 #define CEPH_FILE_MODE_RD         1
 504 #define CEPH_FILE_MODE_WR         2
 505 #define CEPH_FILE_MODE_RDWR       3  /* RD | WR */
 506 #define CEPH_FILE_MODE_LAZY       4  /* lazy io */
 507 #define CEPH_FILE_MODE_NUM        8  /* bc these are bit fields.. mostly */
 508
 509 int ceph_flags_to_mode(int flags);
 510
 511
 512 /* capability bits */
 513 #define CEPH_CAP_PIN         1  /* no specific capabilities beyond the pin */
 514
 515 /* generic cap bits */
 516 #define CEPH_CAP_GSHARED     1  /* client can reads */
 517 #define CEPH_CAP_GEXCL       2  /* client can read and update */
 518 #define CEPH_CAP_GCACHE      4  /* (file) client can cache reads */
 519 #define CEPH_CAP_GRD         8  /* (file) client can read */
 520 #define CEPH_CAP_GWR        16  /* (file) client can write */
 521 #define CEPH_CAP_GBUFFER    32  /* (file) client can buffer writes */
 522 #define CEPH_CAP_GWREXTEND  64  /* (file) client can extend EOF */
 523 #define CEPH_CAP_GLAZYIO   128  /* (file) client can perform lazy io */
 524
 525 /* per-lock shift */
 526 #define CEPH_CAP_SAUTH      2
 527 #define CEPH_CAP_SLINK      4
 528 #define CEPH_CAP_SXATTR     6
 529 #define CEPH_CAP_SFILE      8
 530 #define CEPH_CAP_SFLOCK    20
 531
 532 #define CEPH_CAP_BITS       22
 533
 534 /* composed values */
 535 #define CEPH_CAP_AUTH_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SAUTH)
 536 #define CEPH_CAP_AUTH_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SAUTH)
 537 #define CEPH_CAP_LINK_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SLINK)
 538 #define CEPH_CAP_LINK_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SLINK)
 539 #define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED  << CEPH_CAP_SXATTR)
 540 #define CEPH_CAP_XATTR_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SXATTR)
 541 #define CEPH_CAP_FILE(x)    (x << CEPH_CAP_SFILE)
 542 #define CEPH_CAP_FILE_SHARED   (CEPH_CAP_GSHARED   << CEPH_CAP_SFILE)
 543 #define CEPH_CAP_FILE_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SFILE)
 544 #define CEPH_CAP_FILE_CACHE    (CEPH_CAP_GCACHE    << CEPH_CAP_SFILE)
 545 #define CEPH_CAP_FILE_RD       (CEPH_CAP_GRD       << CEPH_CAP_SFILE)
 546 #define CEPH_CAP_FILE_WR       (CEPH_CAP_GWR       << CEPH_CAP_SFILE)
 547 #define CEPH_CAP_FILE_BUFFER   (CEPH_CAP_GBUFFER   << CEPH_CAP_SFILE)
 548 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
 549 #define CEPH_CAP_FILE_LAZYIO   (CEPH_CAP_GLAZYIO   << CEPH_CAP_SFILE)
 550 #define CEPH_CAP_FLOCK_SHARED  (CEPH_CAP_GSHARED   << CEPH_CAP_SFLOCK)
 551 #define CEPH_CAP_FLOCK_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SFLOCK)
 552
 553
 554 /* cap masks (for getattr) */
 555 #define CEPH_STAT_CAP_INODE    CEPH_CAP_PIN
 556 #define CEPH_STAT_CAP_TYPE     CEPH_CAP_PIN  /* mode >> 12 */
 557 #define CEPH_STAT_CAP_SYMLINK  CEPH_CAP_PIN
 558 #define CEPH_STAT_CAP_UID      CEPH_CAP_AUTH_SHARED
 559 #define CEPH_STAT_CAP_GID      CEPH_CAP_AUTH_SHARED
 560 #define CEPH_STAT_CAP_MODE     CEPH_CAP_AUTH_SHARED
 561 #define CEPH_STAT_CAP_NLINK    CEPH_CAP_LINK_SHARED
 562 #define CEPH_STAT_CAP_LAYOUT   CEPH_CAP_FILE_SHARED
 563 #define CEPH_STAT_CAP_MTIME    CEPH_CAP_FILE_SHARED
 564 #define CEPH_STAT_CAP_SIZE     CEPH_CAP_FILE_SHARED
 565 #define CEPH_STAT_CAP_ATIME    CEPH_CAP_FILE_SHARED  /* fixme */
 566 #define CEPH_STAT_CAP_XATTR    CEPH_CAP_XATTR_SHARED
 567 #define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN |                 \
 568                                  CEPH_CAP_AUTH_SHARED | \
 569                                  CEPH_CAP_LINK_SHARED | \
 570                                  CEPH_CAP_FILE_SHARED | \
 571                                  CEPH_CAP_XATTR_SHARED)
 572
 573 #define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED |                     \
 574                               CEPH_CAP_LINK_SHARED |                    \
 575                               CEPH_CAP_XATTR_SHARED |                   \
 576                               CEPH_CAP_FILE_SHARED)
 577 #define CEPH_CAP_ANY_RD   (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD |     \
 578                            CEPH_CAP_FILE_CACHE)
 579
 580 #define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL |         \
 581                            CEPH_CAP_LINK_EXCL |         \
 582                            CEPH_CAP_XATTR_EXCL |        \
 583                            CEPH_CAP_FILE_EXCL)
 584 #define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
 585                               CEPH_CAP_FILE_EXCL)
 586 #define CEPH_CAP_ANY_WR   (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
 587 #define CEPH_CAP_ANY      (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
 588                            CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
 589                            CEPH_CAP_PIN)
 590
 591 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
 592                         CEPH_LOCK_IXATTR)
 593
 594 int ceph_caps_for_mode(int mode);
 595
 596 enum {
 597         CEPH_CAP_OP_GRANT,         /* mds->client grant */
 598         CEPH_CAP_OP_REVOKE,        /* mds->client revoke */
 599         CEPH_CAP_OP_TRUNC,         /* mds->client trunc notify */
 600         CEPH_CAP_OP_EXPORT,        /* mds has exported the cap */
 601         CEPH_CAP_OP_IMPORT,        /* mds has imported the cap */
 602         CEPH_CAP_OP_UPDATE,        /* client->mds update */
 603         CEPH_CAP_OP_DROP,          /* client->mds drop cap bits */
 604         CEPH_CAP_OP_FLUSH,         /* client->mds cap writeback */
 605         CEPH_CAP_OP_FLUSH_ACK,     /* mds->client flushed */
 606         CEPH_CAP_OP_FLUSHSNAP,     /* client->mds flush snapped metadata */
 607         CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
 608         CEPH_CAP_OP_RELEASE,       /* client->mds release (clean) cap */
 609         CEPH_CAP_OP_RENEW,         /* client->mds renewal request */
 610 };
 611
 612 extern const char *ceph_cap_op_name(int op);
 613
 614 /*
 615  * caps message, used for capability callbacks, acks, requests, etc.
 616  */
 617 struct ceph_mds_caps {
 618         __le32 op;                  /* CEPH_CAP_OP_* */
 619         __le64 ino, realm;
 620         __le64 cap_id;
 621         __le32 seq, issue_seq;
 622         __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
 623         __le32 migrate_seq;
 624         __le64 snap_follows;
 625         __le32 snap_trace_len;
 626
 627         /* authlock */
 628         __le32 uid, gid, mode;
 629
 630         /* linklock */
 631         __le32 nlink;
 632
 633         /* xattrlock */
 634         __le32 xattr_len;
 635         __le64 xattr_version;
 636
 637         /* filelock */
 638         __le64 size, max_size, truncate_size;
 639         __le32 truncate_seq;
 640         struct ceph_timespec mtime, atime, ctime;
 641         struct ceph_file_layout layout;
 642         __le32 time_warp_seq;
 643 } __attribute__ ((packed));
 644
 645 /* cap release msg head */
 646 struct ceph_mds_cap_release {
 647         __le32 num;                /* number of cap_items that follow */
 648 } __attribute__ ((packed));
 649
 650 struct ceph_mds_cap_item {
 651         __le64 ino;
 652         __le64 cap_id;
 653         __le32 migrate_seq, seq;
 654 } __attribute__ ((packed));
 655
 656 #define CEPH_MDS_LEASE_REVOKE           1  /*    mds  -> client */
 657 #define CEPH_MDS_LEASE_RELEASE          2  /* client  -> mds    */
 658 #define CEPH_MDS_LEASE_RENEW            3  /* client <-> mds    */
 659 #define CEPH_MDS_LEASE_REVOKE_ACK       4  /* client  -> mds    */
 660
 661 extern const char *ceph_lease_op_name(int o);
 662
 663 /* lease msg header */
 664 struct ceph_mds_lease {
 665         __u8 action;            /* CEPH_MDS_LEASE_* */
 666         __le16 mask;            /* which lease */
 667         __le64 ino;
 668         __le64 first, last;     /* snap range */
 669         __le32 seq;
 670         __le32 duration_ms;     /* duration of renewal */
 671 } __attribute__ ((packed));
 672 /* followed by a __le32+string for dname */
 673
 674 /* client reconnect */
 675 struct ceph_mds_cap_reconnect {
 676         __le64 cap_id;
 677         __le32 wanted;
 678         __le32 issued;
 679         __le64 snaprealm;
 680         __le64 pathbase;        /* base ino for our path to this ino */
 681         __le32 flock_len;       /* size of flock state blob, if any */
 682 } __attribute__ ((packed));
 683 /* followed by flock blob */
 684
 685 struct ceph_mds_cap_reconnect_v1 {
 686         __le64 cap_id;
 687         __le32 wanted;
 688         __le32 issued;
 689         __le64 size;
 690         struct ceph_timespec mtime, atime;
 691         __le64 snaprealm;
 692         __le64 pathbase;        /* base ino for our path to this ino */
 693 } __attribute__ ((packed));
 694
 695 struct ceph_mds_snaprealm_reconnect {
 696         __le64 ino;     /* snap realm base */
 697         __le64 seq;     /* snap seq for this snap realm */
 698         __le64 parent;  /* parent realm */
 699 } __attribute__ ((packed));
 700
 701 /*
 702  * snaps
 703  */
 704 enum {
 705         CEPH_SNAP_OP_UPDATE,  /* CREATE or DESTROY */
 706         CEPH_SNAP_OP_CREATE,
 707         CEPH_SNAP_OP_DESTROY,
 708         CEPH_SNAP_OP_SPLIT,
 709 };
 710
 711 extern const char *ceph_snap_op_name(int o);
 712
 713 /* snap msg header */
 714 struct ceph_mds_snap_head {
 715         __le32 op;                /* CEPH_SNAP_OP_* */
 716         __le64 split;             /* ino to split off, if any */
 717         __le32 num_split_inos;    /* # inos belonging to new child realm */
 718         __le32 num_split_realms;  /* # child realms udner new child realm */
 719         __le32 trace_len;         /* size of snap trace blob */
 720 } __attribute__ ((packed));
 721 /* followed by split ino list, then split realms, then the trace blob */
 722
 723 /*
 724  * encode info about a snaprealm, as viewed by a client
 725  */
 726 struct ceph_mds_snap_realm {
 727         __le64 ino;           /* ino */
 728         __le64 created;       /* snap: when created */
 729         __le64 parent;        /* ino: parent realm */
 730         __le64 parent_since;  /* snap: same parent since */
 731         __le64 seq;           /* snap: version */
 732         __le32 num_snaps;
 733         __le32 num_prior_parent_snaps;
 734 } __attribute__ ((packed));
 735 /* followed by my snap list, then prior parent snap list */
 736
 737 #endif