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