include/linux/ceph/ceph

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   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * ceph_fs.h - Ceph constants and data types to share between kernel and
   4  * user space.
   5  *
   6  * Most types in this file are defined as little-endian, and are
   7  * primarily intended to describe data structures that pass over the
   8  * wire or that are stored on disk.
   9  *
  10  * LGPL2
  11  */
  12 
  13 #ifndef CEPH_FS_H
  14 #define CEPH_FS_H
  15 
  16 #include <linux/ceph/msgr.h>
  17 #include <linux/ceph/rados.h>
  18 
  19 /*
  20  * subprotocol versions.  when specific messages types or high-level
  21  * protocols change, bump the affected components.  we keep rev
  22  * internal cluster protocols separately from the public,
  23  * client-facing protocol.
  24  */
  25 #define CEPH_OSDC_PROTOCOL   24 /* server/client */
  26 #define CEPH_MDSC_PROTOCOL   32 /* server/client */
  27 #define CEPH_MONC_PROTOCOL   15 /* server/client */
  28 
  29 
  30 #define CEPH_INO_ROOT   1
  31 #define CEPH_INO_CEPH   2       /* hidden .ceph dir */
  32 #define CEPH_INO_DOTDOT 3       /* used by ceph fuse for parent (..) */
  33 
  34 /* arbitrary limit on max # of monitors (cluster of 3 is typical) */
  35 #define CEPH_MAX_MON   31
  36 
  37 /*
  38  * legacy ceph_file_layoute
  39  */
  40 struct ceph_file_layout_legacy {
  41         /* file -> object mapping */
  42         __le32 fl_stripe_unit;     /* stripe unit, in bytes.  must be multiple
  43                                       of page size. */
  44         __le32 fl_stripe_count;    /* over this many objects */
  45         __le32 fl_object_size;     /* until objects are this big, then move to
  46                                       new objects */
  47         __le32 fl_cas_hash;        /* UNUSED.  0 = none; 1 = sha256 */
  48 
  49         /* pg -> disk layout */
  50         __le32 fl_object_stripe_unit;  /* UNUSED.  for per-object parity, if any */
  51 
  52         /* object -> pg layout */
  53         __le32 fl_unused;       /* unused; used to be preferred primary for pg (-1 for none) */
  54         __le32 fl_pg_pool;      /* namespace, crush ruleset, rep level */
  55 } __attribute__ ((packed));
  56 
  57 struct ceph_string;
  58 /*
  59  * ceph_file_layout - describe data layout for a file/inode
  60  */
  61 struct ceph_file_layout {
  62         /* file -> object mapping */
  63         u32 stripe_unit;   /* stripe unit, in bytes */
  64         u32 stripe_count;  /* over this many objects */
  65         u32 object_size;   /* until objects are this big */
  66         s64 pool_id;        /* rados pool id */
  67         struct ceph_string __rcu *pool_ns; /* rados pool namespace */
  68 };
  69 
  70 extern int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
  71 extern void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
  72                                 struct ceph_file_layout_legacy *legacy);
  73 extern void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
  74                                 struct ceph_file_layout_legacy *legacy);
  75 
  76 #define CEPH_MIN_STRIPE_UNIT 65536
  77 
  78 struct ceph_dir_layout {
  79         __u8   dl_dir_hash;   /* see ceph_hash.h for ids */
  80         __u8   dl_unused1;
  81         __u16  dl_unused2;
  82         __u32  dl_unused3;
  83 } __attribute__ ((packed));
  84 
  85 /* crypto algorithms */
  86 #define CEPH_CRYPTO_NONE 0x0
  87 #define CEPH_CRYPTO_AES  0x1
  88 
  89 #define CEPH_AES_IV "cephsageyudagreg"
  90 
  91 /* security/authentication protocols */
  92 #define CEPH_AUTH_UNKNOWN       0x0
  93 #define CEPH_AUTH_NONE          0x1
  94 #define CEPH_AUTH_CEPHX         0x2
  95 
  96 #define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
  97 
  98 
  99 /*********************************************
 100  * message layer
 101  */
 102 
 103 /*
 104  * message types
 105  */
 106 
 107 /* misc */
 108 #define CEPH_MSG_SHUTDOWN               1
 109 #define CEPH_MSG_PING                   2
 110 
 111 /* client <-> monitor */
 112 #define CEPH_MSG_MON_MAP                4
 113 #define CEPH_MSG_MON_GET_MAP            5
 114 #define CEPH_MSG_STATFS                 13
 115 #define CEPH_MSG_STATFS_REPLY           14
 116 #define CEPH_MSG_MON_SUBSCRIBE          15
 117 #define CEPH_MSG_MON_SUBSCRIBE_ACK      16
 118 #define CEPH_MSG_AUTH                   17
 119 #define CEPH_MSG_AUTH_REPLY             18
 120 #define CEPH_MSG_MON_GET_VERSION        19
 121 #define CEPH_MSG_MON_GET_VERSION_REPLY  20
 122 
 123 /* client <-> mds */
 124 #define CEPH_MSG_MDS_MAP                21
 125 #define CEPH_MSG_FS_MAP_USER            103
 126 
 127 #define CEPH_MSG_CLIENT_SESSION         22
 128 #define CEPH_MSG_CLIENT_RECONNECT       23
 129 
 130 #define CEPH_MSG_CLIENT_REQUEST         24
 131 #define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
 132 #define CEPH_MSG_CLIENT_REPLY           26
 133 #define CEPH_MSG_CLIENT_CAPS            0x310
 134 #define CEPH_MSG_CLIENT_LEASE           0x311
 135 #define CEPH_MSG_CLIENT_SNAP            0x312
 136 #define CEPH_MSG_CLIENT_CAPRELEASE      0x313
 137 #define CEPH_MSG_CLIENT_QUOTA           0x314
 138 
 139 /* pool ops */
 140 #define CEPH_MSG_POOLOP_REPLY           48
 141 #define CEPH_MSG_POOLOP                 49
 142 
 143 /* mon commands */
 144 #define CEPH_MSG_MON_COMMAND            50
 145 #define CEPH_MSG_MON_COMMAND_ACK        51
 146 
 147 /* osd */
 148 #define CEPH_MSG_OSD_MAP                41
 149 #define CEPH_MSG_OSD_OP                 42
 150 #define CEPH_MSG_OSD_OPREPLY            43
 151 #define CEPH_MSG_WATCH_NOTIFY           44
 152 #define CEPH_MSG_OSD_BACKOFF            61
 153 
 154 
 155 /* watch-notify operations */
 156 enum {
 157         CEPH_WATCH_EVENT_NOTIFY           = 1, /* notifying watcher */
 158         CEPH_WATCH_EVENT_NOTIFY_COMPLETE  = 2, /* notifier notified when done */
 159         CEPH_WATCH_EVENT_DISCONNECT       = 3, /* we were disconnected */
 160 };
 161 
 162 
 163 struct ceph_mon_request_header {
 164         __le64 have_version;
 165         __le16 session_mon;
 166         __le64 session_mon_tid;
 167 } __attribute__ ((packed));
 168 
 169 struct ceph_mon_statfs {
 170         struct ceph_mon_request_header monhdr;
 171         struct ceph_fsid fsid;
 172         __u8 contains_data_pool;
 173         __le64 data_pool;
 174 } __attribute__ ((packed));
 175 
 176 struct ceph_statfs {
 177         __le64 kb, kb_used, kb_avail;
 178         __le64 num_objects;
 179 } __attribute__ ((packed));
 180 
 181 struct ceph_mon_statfs_reply {
 182         struct ceph_fsid fsid;
 183         __le64 version;
 184         struct ceph_statfs st;
 185 } __attribute__ ((packed));
 186 
 187 struct ceph_mon_command {
 188         struct ceph_mon_request_header monhdr;
 189         struct ceph_fsid fsid;
 190         __le32 num_strs;         /* always 1 */
 191         __le32 str_len;
 192         char str[];
 193 } __attribute__ ((packed));
 194 
 195 struct ceph_osd_getmap {
 196         struct ceph_mon_request_header monhdr;
 197         struct ceph_fsid fsid;
 198         __le32 start;
 199 } __attribute__ ((packed));
 200 
 201 struct ceph_mds_getmap {
 202         struct ceph_mon_request_header monhdr;
 203         struct ceph_fsid fsid;
 204 } __attribute__ ((packed));
 205 
 206 struct ceph_client_mount {
 207         struct ceph_mon_request_header monhdr;
 208 } __attribute__ ((packed));
 209 
 210 #define CEPH_SUBSCRIBE_ONETIME    1  /* i want only 1 update after have */
 211 
 212 struct ceph_mon_subscribe_item {
 213         __le64 start;
 214         __u8 flags;
 215 } __attribute__ ((packed));
 216 
 217 struct ceph_mon_subscribe_ack {
 218         __le32 duration;         /* seconds */
 219         struct ceph_fsid fsid;
 220 } __attribute__ ((packed));
 221 
 222 #define CEPH_FS_CLUSTER_ID_NONE  -1
 223 
 224 /*
 225  * mdsmap flags
 226  */
 227 #define CEPH_MDSMAP_DOWN    (1<<0)  /* cluster deliberately down */
 228 
 229 /*
 230  * mds states
 231  *   > 0 -> in
 232  *  <= 0 -> out
 233  */
 234 #define CEPH_MDS_STATE_DNE          0  /* down, does not exist. */
 235 #define CEPH_MDS_STATE_STOPPED     -1  /* down, once existed, but no subtrees.
 236                                           empty log. */
 237 #define CEPH_MDS_STATE_BOOT        -4  /* up, boot announcement. */
 238 #define CEPH_MDS_STATE_STANDBY     -5  /* up, idle.  waiting for assignment. */
 239 #define CEPH_MDS_STATE_CREATING    -6  /* up, creating MDS instance. */
 240 #define CEPH_MDS_STATE_STARTING    -7  /* up, starting previously stopped mds */
 241 #define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
 242 #define CEPH_MDS_STATE_REPLAYONCE   -9 /* up, replaying an active node's journal */
 243 
 244 #define CEPH_MDS_STATE_REPLAY       8  /* up, replaying journal. */
 245 #define CEPH_MDS_STATE_RESOLVE      9  /* up, disambiguating distributed
 246                                           operations (import, rename, etc.) */
 247 #define CEPH_MDS_STATE_RECONNECT    10 /* up, reconnect to clients */
 248 #define CEPH_MDS_STATE_REJOIN       11 /* up, rejoining distributed cache */
 249 #define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
 250 #define CEPH_MDS_STATE_ACTIVE       13 /* up, active */
 251 #define CEPH_MDS_STATE_STOPPING     14 /* up, but exporting metadata */
 252 
 253 extern const char *ceph_mds_state_name(int s);
 254 
 255 
 256 /*
 257  * metadata lock types.
 258  *  - these are bitmasks.. we can compose them
 259  *  - they also define the lock ordering by the MDS
 260  *  - a few of these are internal to the mds
 261  */
 262 #define CEPH_LOCK_DVERSION    1
 263 #define CEPH_LOCK_DN          2
 264 #define CEPH_LOCK_ISNAP       16
 265 #define CEPH_LOCK_IVERSION    32    /* mds internal */
 266 #define CEPH_LOCK_IFILE       64
 267 #define CEPH_LOCK_IAUTH       128
 268 #define CEPH_LOCK_ILINK       256
 269 #define CEPH_LOCK_IDFT        512   /* dir frag tree */
 270 #define CEPH_LOCK_INEST       1024  /* mds internal */
 271 #define CEPH_LOCK_IXATTR      2048
 272 #define CEPH_LOCK_IFLOCK      4096  /* advisory file locks */
 273 #define CEPH_LOCK_INO         8192  /* immutable inode bits; not a lock */
 274 #define CEPH_LOCK_IPOLICY     16384 /* policy lock on dirs. MDS internal */
 275 
 276 /* client_session ops */
 277 enum {
 278         CEPH_SESSION_REQUEST_OPEN,
 279         CEPH_SESSION_OPEN,
 280         CEPH_SESSION_REQUEST_CLOSE,
 281         CEPH_SESSION_CLOSE,
 282         CEPH_SESSION_REQUEST_RENEWCAPS,
 283         CEPH_SESSION_RENEWCAPS,
 284         CEPH_SESSION_STALE,
 285         CEPH_SESSION_RECALL_STATE,
 286         CEPH_SESSION_FLUSHMSG,
 287         CEPH_SESSION_FLUSHMSG_ACK,
 288         CEPH_SESSION_FORCE_RO,
 289         CEPH_SESSION_REJECT,
 290 };
 291 
 292 extern const char *ceph_session_op_name(int op);
 293 
 294 struct ceph_mds_session_head {
 295         __le32 op;
 296         __le64 seq;
 297         struct ceph_timespec stamp;
 298         __le32 max_caps, max_leases;
 299 } __attribute__ ((packed));
 300 
 301 /* client_request */
 302 /*
 303  * metadata ops.
 304  *  & 0x001000 -> write op
 305  *  & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
 306  &  & 0x100000 -> use weird ino/path trace
 307  */
 308 #define CEPH_MDS_OP_WRITE        0x001000
 309 enum {
 310         CEPH_MDS_OP_LOOKUP     = 0x00100,
 311         CEPH_MDS_OP_GETATTR    = 0x00101,
 312         CEPH_MDS_OP_LOOKUPHASH = 0x00102,
 313         CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
 314         CEPH_MDS_OP_LOOKUPINO  = 0x00104,
 315         CEPH_MDS_OP_LOOKUPNAME = 0x00105,
 316 
 317         CEPH_MDS_OP_SETXATTR   = 0x01105,
 318         CEPH_MDS_OP_RMXATTR    = 0x01106,
 319         CEPH_MDS_OP_SETLAYOUT  = 0x01107,
 320         CEPH_MDS_OP_SETATTR    = 0x01108,
 321         CEPH_MDS_OP_SETFILELOCK= 0x01109,
 322         CEPH_MDS_OP_GETFILELOCK= 0x00110,
 323         CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
 324 
 325         CEPH_MDS_OP_MKNOD      = 0x01201,
 326         CEPH_MDS_OP_LINK       = 0x01202,
 327         CEPH_MDS_OP_UNLINK     = 0x01203,
 328         CEPH_MDS_OP_RENAME     = 0x01204,
 329         CEPH_MDS_OP_MKDIR      = 0x01220,
 330         CEPH_MDS_OP_RMDIR      = 0x01221,
 331         CEPH_MDS_OP_SYMLINK    = 0x01222,
 332 
 333         CEPH_MDS_OP_CREATE     = 0x01301,
 334         CEPH_MDS_OP_OPEN       = 0x00302,
 335         CEPH_MDS_OP_READDIR    = 0x00305,
 336 
 337         CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
 338         CEPH_MDS_OP_MKSNAP     = 0x01400,
 339         CEPH_MDS_OP_RMSNAP     = 0x01401,
 340         CEPH_MDS_OP_LSSNAP     = 0x00402,
 341         CEPH_MDS_OP_RENAMESNAP = 0x01403,
 342 };
 343 
 344 extern const char *ceph_mds_op_name(int op);
 345 
 346 
 347 #define CEPH_SETATTR_MODE   1
 348 #define CEPH_SETATTR_UID    2
 349 #define CEPH_SETATTR_GID    4
 350 #define CEPH_SETATTR_MTIME  8
 351 #define CEPH_SETATTR_ATIME 16
 352 #define CEPH_SETATTR_SIZE  32
 353 #define CEPH_SETATTR_CTIME 64
 354 
 355 /*
 356  * Ceph setxattr request flags.
 357  */
 358 #define CEPH_XATTR_CREATE  (1 << 0)
 359 #define CEPH_XATTR_REPLACE (1 << 1)
 360 #define CEPH_XATTR_REMOVE  (1 << 31)
 361 
 362 /*
 363  * readdir request flags;
 364  */
 365 #define CEPH_READDIR_REPLY_BITFLAGS     (1<<0)
 366 
 367 /*
 368  * readdir reply flags.
 369  */
 370 #define CEPH_READDIR_FRAG_END           (1<<0)
 371 #define CEPH_READDIR_FRAG_COMPLETE      (1<<8)
 372 #define CEPH_READDIR_HASH_ORDER         (1<<9)
 373 #define CEPH_READDIR_OFFSET_HASH        (1<<10)
 374 
 375 /*
 376  * open request flags
 377  */
 378 #define CEPH_O_RDONLY           00000000
 379 #define CEPH_O_WRONLY           00000001
 380 #define CEPH_O_RDWR             00000002
 381 #define CEPH_O_CREAT            00000100
 382 #define CEPH_O_EXCL             00000200
 383 #define CEPH_O_TRUNC            00001000
 384 #define CEPH_O_DIRECTORY        00200000
 385 #define CEPH_O_NOFOLLOW         00400000
 386 
 387 union ceph_mds_request_args {
 388         struct {
 389                 __le32 mask;                 /* CEPH_CAP_* */
 390         } __attribute__ ((packed)) getattr;
 391         struct {
 392                 __le32 mode;
 393                 __le32 uid;
 394                 __le32 gid;
 395                 struct ceph_timespec mtime;
 396                 struct ceph_timespec atime;
 397                 __le64 size, old_size;       /* old_size needed by truncate */
 398                 __le32 mask;                 /* CEPH_SETATTR_* */
 399         } __attribute__ ((packed)) setattr;
 400         struct {
 401                 __le32 frag;                 /* which dir fragment */
 402                 __le32 max_entries;          /* how many dentries to grab */
 403                 __le32 max_bytes;
 404                 __le16 flags;
 405                 __le32 offset_hash;
 406         } __attribute__ ((packed)) readdir;
 407         struct {
 408                 __le32 mode;
 409                 __le32 rdev;
 410         } __attribute__ ((packed)) mknod;
 411         struct {
 412                 __le32 mode;
 413         } __attribute__ ((packed)) mkdir;
 414         struct {
 415                 __le32 flags;
 416                 __le32 mode;
 417                 __le32 stripe_unit;          /* layout for newly created file */
 418                 __le32 stripe_count;         /* ... */
 419                 __le32 object_size;
 420                 __le32 file_replication;
 421                __le32 mask;                 /* CEPH_CAP_* */
 422                __le32 old_size;
 423         } __attribute__ ((packed)) open;
 424         struct {
 425                 __le32 flags;
 426         } __attribute__ ((packed)) setxattr;
 427         struct {
 428                 struct ceph_file_layout_legacy layout;
 429         } __attribute__ ((packed)) setlayout;
 430         struct {
 431                 __u8 rule; /* currently fcntl or flock */
 432                 __u8 type; /* shared, exclusive, remove*/
 433                 __le64 owner; /* owner of the lock */
 434                 __le64 pid; /* process id requesting the lock */
 435                 __le64 start; /* initial location to lock */
 436                 __le64 length; /* num bytes to lock from start */
 437                 __u8 wait; /* will caller wait for lock to become available? */
 438         } __attribute__ ((packed)) filelock_change;
 439         struct {
 440                 __le32 mask;                 /* CEPH_CAP_* */
 441                 __le64 snapid;
 442                 __le64 parent;
 443                 __le32 hash;
 444         } __attribute__ ((packed)) lookupino;
 445 } __attribute__ ((packed));
 446 
 447 #define CEPH_MDS_FLAG_REPLAY        1  /* this is a replayed op */
 448 #define CEPH_MDS_FLAG_WANT_DENTRY   2  /* want dentry in reply */
 449 
 450 struct ceph_mds_request_head {
 451         __le64 oldest_client_tid;
 452         __le32 mdsmap_epoch;           /* on client */
 453         __le32 flags;                  /* CEPH_MDS_FLAG_* */
 454         __u8 num_retry, num_fwd;       /* count retry, fwd attempts */
 455         __le16 num_releases;           /* # include cap/lease release records */
 456         __le32 op;                     /* mds op code */
 457         __le32 caller_uid, caller_gid;
 458         __le64 ino;                    /* use this ino for openc, mkdir, mknod,
 459                                           etc. (if replaying) */
 460         union ceph_mds_request_args args;
 461 } __attribute__ ((packed));
 462 
 463 /* cap/lease release record */
 464 struct ceph_mds_request_release {
 465         __le64 ino, cap_id;            /* ino and unique cap id */
 466         __le32 caps, wanted;           /* new issued, wanted */
 467         __le32 seq, issue_seq, mseq;
 468         __le32 dname_seq;              /* if releasing a dentry lease, a */
 469         __le32 dname_len;              /* string follows. */
 470 } __attribute__ ((packed));
 471 
 472 /* client reply */
 473 struct ceph_mds_reply_head {
 474         __le32 op;
 475         __le32 result;
 476         __le32 mdsmap_epoch;
 477         __u8 safe;                     /* true if committed to disk */
 478         __u8 is_dentry, is_target;     /* true if dentry, target inode records
 479                                           are included with reply */
 480 } __attribute__ ((packed));
 481 
 482 /* one for each node split */
 483 struct ceph_frag_tree_split {
 484         __le32 frag;                   /* this frag splits... */
 485         __le32 by;                     /* ...by this many bits */
 486 } __attribute__ ((packed));
 487 
 488 struct ceph_frag_tree_head {
 489         __le32 nsplits;                /* num ceph_frag_tree_split records */
 490         struct ceph_frag_tree_split splits[];
 491 } __attribute__ ((packed));
 492 
 493 /* capability issue, for bundling with mds reply */
 494 struct ceph_mds_reply_cap {
 495         __le32 caps, wanted;           /* caps issued, wanted */
 496         __le64 cap_id;
 497         __le32 seq, mseq;
 498         __le64 realm;                  /* snap realm */
 499         __u8 flags;                    /* CEPH_CAP_FLAG_* */
 500 } __attribute__ ((packed));
 501 
 502 #define CEPH_CAP_FLAG_AUTH      (1 << 0)  /* cap is issued by auth mds */
 503 #define CEPH_CAP_FLAG_RELEASE   (1 << 1)  /* release the cap */
 504 
 505 /* inode record, for bundling with mds reply */
 506 struct ceph_mds_reply_inode {
 507         __le64 ino;
 508         __le64 snapid;
 509         __le32 rdev;
 510         __le64 version;                /* inode version */
 511         __le64 xattr_version;          /* version for xattr blob */
 512         struct ceph_mds_reply_cap cap; /* caps issued for this inode */
 513         struct ceph_file_layout_legacy layout;
 514         struct ceph_timespec ctime, mtime, atime;
 515         __le32 time_warp_seq;
 516         __le64 size, max_size, truncate_size;
 517         __le32 truncate_seq;
 518         __le32 mode, uid, gid;
 519         __le32 nlink;
 520         __le64 files, subdirs, rbytes, rfiles, rsubdirs;  /* dir stats */
 521         struct ceph_timespec rctime;
 522         struct ceph_frag_tree_head fragtree;  /* (must be at end of struct) */
 523 } __attribute__ ((packed));
 524 /* followed by frag array, symlink string, dir layout, xattr blob */
 525 
 526 /* reply_lease follows dname, and reply_inode */
 527 struct ceph_mds_reply_lease {
 528         __le16 mask;            /* lease type(s) */
 529         __le32 duration_ms;     /* lease duration */
 530         __le32 seq;
 531 } __attribute__ ((packed));
 532 
 533 struct ceph_mds_reply_dirfrag {
 534         __le32 frag;            /* fragment */
 535         __le32 auth;            /* auth mds, if this is a delegation point */
 536         __le32 ndist;           /* number of mds' this is replicated on */
 537         __le32 dist[];
 538 } __attribute__ ((packed));
 539 
 540 #define CEPH_LOCK_FCNTL         1
 541 #define CEPH_LOCK_FLOCK         2
 542 #define CEPH_LOCK_FCNTL_INTR    3
 543 #define CEPH_LOCK_FLOCK_INTR    4
 544 
 545 
 546 #define CEPH_LOCK_SHARED   1
 547 #define CEPH_LOCK_EXCL     2
 548 #define CEPH_LOCK_UNLOCK   4
 549 
 550 struct ceph_filelock {
 551         __le64 start;/* file offset to start lock at */
 552         __le64 length; /* num bytes to lock; 0 for all following start */
 553         __le64 client; /* which client holds the lock */
 554         __le64 owner; /* owner the lock */
 555         __le64 pid; /* process id holding the lock on the client */
 556         __u8 type; /* shared lock, exclusive lock, or unlock */
 557 } __attribute__ ((packed));
 558 
 559 
 560 /* file access modes */
 561 #define CEPH_FILE_MODE_PIN        0
 562 #define CEPH_FILE_MODE_RD         1
 563 #define CEPH_FILE_MODE_WR         2
 564 #define CEPH_FILE_MODE_RDWR       3  /* RD | WR */
 565 #define CEPH_FILE_MODE_LAZY       4  /* lazy io */
 566 #define CEPH_FILE_MODE_BITS       4
 567 
 568 int ceph_flags_to_mode(int flags);
 569 
 570 #define CEPH_INLINE_NONE        ((__u64)-1)
 571 
 572 /* capability bits */
 573 #define CEPH_CAP_PIN         1  /* no specific capabilities beyond the pin */
 574 
 575 /* generic cap bits */
 576 #define CEPH_CAP_GSHARED     1  /* client can reads */
 577 #define CEPH_CAP_GEXCL       2  /* client can read and update */
 578 #define CEPH_CAP_GCACHE      4  /* (file) client can cache reads */
 579 #define CEPH_CAP_GRD         8  /* (file) client can read */
 580 #define CEPH_CAP_GWR        16  /* (file) client can write */
 581 #define CEPH_CAP_GBUFFER    32  /* (file) client can buffer writes */
 582 #define CEPH_CAP_GWREXTEND  64  /* (file) client can extend EOF */
 583 #define CEPH_CAP_GLAZYIO   128  /* (file) client can perform lazy io */
 584 
 585 #define CEPH_CAP_SIMPLE_BITS  2
 586 #define CEPH_CAP_FILE_BITS    8
 587 
 588 /* per-lock shift */
 589 #define CEPH_CAP_SAUTH      2
 590 #define CEPH_CAP_SLINK      4
 591 #define CEPH_CAP_SXATTR     6
 592 #define CEPH_CAP_SFILE      8
 593 #define CEPH_CAP_SFLOCK    20
 594 
 595 #define CEPH_CAP_BITS      22
 596 
 597 /* composed values */
 598 #define CEPH_CAP_AUTH_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SAUTH)
 599 #define CEPH_CAP_AUTH_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SAUTH)
 600 #define CEPH_CAP_LINK_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SLINK)
 601 #define CEPH_CAP_LINK_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SLINK)
 602 #define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED  << CEPH_CAP_SXATTR)
 603 #define CEPH_CAP_XATTR_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SXATTR)
 604 #define CEPH_CAP_FILE(x)    (x << CEPH_CAP_SFILE)
 605 #define CEPH_CAP_FILE_SHARED   (CEPH_CAP_GSHARED   << CEPH_CAP_SFILE)
 606 #define CEPH_CAP_FILE_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SFILE)
 607 #define CEPH_CAP_FILE_CACHE    (CEPH_CAP_GCACHE    << CEPH_CAP_SFILE)
 608 #define CEPH_CAP_FILE_RD       (CEPH_CAP_GRD       << CEPH_CAP_SFILE)
 609 #define CEPH_CAP_FILE_WR       (CEPH_CAP_GWR       << CEPH_CAP_SFILE)
 610 #define CEPH_CAP_FILE_BUFFER   (CEPH_CAP_GBUFFER   << CEPH_CAP_SFILE)
 611 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
 612 #define CEPH_CAP_FILE_LAZYIO   (CEPH_CAP_GLAZYIO   << CEPH_CAP_SFILE)
 613 #define CEPH_CAP_FLOCK_SHARED  (CEPH_CAP_GSHARED   << CEPH_CAP_SFLOCK)
 614 #define CEPH_CAP_FLOCK_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SFLOCK)
 615 
 616 
 617 /* cap masks (for getattr) */
 618 #define CEPH_STAT_CAP_INODE    CEPH_CAP_PIN
 619 #define CEPH_STAT_CAP_TYPE     CEPH_CAP_PIN  /* mode >> 12 */
 620 #define CEPH_STAT_CAP_SYMLINK  CEPH_CAP_PIN
 621 #define CEPH_STAT_CAP_UID      CEPH_CAP_AUTH_SHARED
 622 #define CEPH_STAT_CAP_GID      CEPH_CAP_AUTH_SHARED
 623 #define CEPH_STAT_CAP_MODE     CEPH_CAP_AUTH_SHARED
 624 #define CEPH_STAT_CAP_NLINK    CEPH_CAP_LINK_SHARED
 625 #define CEPH_STAT_CAP_LAYOUT   CEPH_CAP_FILE_SHARED
 626 #define CEPH_STAT_CAP_MTIME    CEPH_CAP_FILE_SHARED
 627 #define CEPH_STAT_CAP_SIZE     CEPH_CAP_FILE_SHARED
 628 #define CEPH_STAT_CAP_ATIME    CEPH_CAP_FILE_SHARED  /* fixme */
 629 #define CEPH_STAT_CAP_XATTR    CEPH_CAP_XATTR_SHARED
 630 #define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN |                 \
 631                                  CEPH_CAP_AUTH_SHARED | \
 632                                  CEPH_CAP_LINK_SHARED | \
 633                                  CEPH_CAP_FILE_SHARED | \
 634                                  CEPH_CAP_XATTR_SHARED)
 635 #define CEPH_STAT_CAP_INLINE_DATA (CEPH_CAP_FILE_SHARED | \
 636                                    CEPH_CAP_FILE_RD)
 637 #define CEPH_STAT_RSTAT CEPH_CAP_FILE_WREXTEND
 638 
 639 #define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED |                     \
 640                               CEPH_CAP_LINK_SHARED |                    \
 641                               CEPH_CAP_XATTR_SHARED |                   \
 642                               CEPH_CAP_FILE_SHARED)
 643 #define CEPH_CAP_ANY_RD   (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD |     \
 644                            CEPH_CAP_FILE_CACHE)
 645 
 646 #define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL |         \
 647                            CEPH_CAP_LINK_EXCL |         \
 648                            CEPH_CAP_XATTR_EXCL |        \
 649                            CEPH_CAP_FILE_EXCL)
 650 #define CEPH_CAP_ANY_FILE_RD (CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | \
 651                               CEPH_CAP_FILE_SHARED)
 652 #define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
 653                               CEPH_CAP_FILE_EXCL)
 654 #define CEPH_CAP_ANY_WR   (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
 655 #define CEPH_CAP_ANY      (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
 656                            CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
 657                            CEPH_CAP_PIN)
 658 
 659 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
 660                         CEPH_LOCK_IXATTR)
 661 
 662 int ceph_caps_for_mode(int mode);
 663 
 664 enum {
 665         CEPH_CAP_OP_GRANT,         /* mds->client grant */
 666         CEPH_CAP_OP_REVOKE,        /* mds->client revoke */
 667         CEPH_CAP_OP_TRUNC,         /* mds->client trunc notify */
 668         CEPH_CAP_OP_EXPORT,        /* mds has exported the cap */
 669         CEPH_CAP_OP_IMPORT,        /* mds has imported the cap */
 670         CEPH_CAP_OP_UPDATE,        /* client->mds update */
 671         CEPH_CAP_OP_DROP,          /* client->mds drop cap bits */
 672         CEPH_CAP_OP_FLUSH,         /* client->mds cap writeback */
 673         CEPH_CAP_OP_FLUSH_ACK,     /* mds->client flushed */
 674         CEPH_CAP_OP_FLUSHSNAP,     /* client->mds flush snapped metadata */
 675         CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
 676         CEPH_CAP_OP_RELEASE,       /* client->mds release (clean) cap */
 677         CEPH_CAP_OP_RENEW,         /* client->mds renewal request */
 678 };
 679 
 680 extern const char *ceph_cap_op_name(int op);
 681 
 682 /* flags field in client cap messages (version >= 10) */
 683 #define CEPH_CLIENT_CAPS_SYNC                   (1<<0)
 684 #define CEPH_CLIENT_CAPS_NO_CAPSNAP             (1<<1)
 685 #define CEPH_CLIENT_CAPS_PENDING_CAPSNAP        (1<<2)
 686 
 687 /*
 688  * caps message, used for capability callbacks, acks, requests, etc.
 689  */
 690 struct ceph_mds_caps {
 691         __le32 op;                  /* CEPH_CAP_OP_* */
 692         __le64 ino, realm;
 693         __le64 cap_id;
 694         __le32 seq, issue_seq;
 695         __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
 696         __le32 migrate_seq;
 697         __le64 snap_follows;
 698         __le32 snap_trace_len;
 699 
 700         /* authlock */
 701         __le32 uid, gid, mode;
 702 
 703         /* linklock */
 704         __le32 nlink;
 705 
 706         /* xattrlock */
 707         __le32 xattr_len;
 708         __le64 xattr_version;
 709 
 710         /* filelock */
 711         __le64 size, max_size, truncate_size;
 712         __le32 truncate_seq;
 713         struct ceph_timespec mtime, atime, ctime;
 714         struct ceph_file_layout_legacy layout;
 715         __le32 time_warp_seq;
 716 } __attribute__ ((packed));
 717 
 718 struct ceph_mds_cap_peer {
 719         __le64 cap_id;
 720         __le32 seq;
 721         __le32 mseq;
 722         __le32 mds;
 723         __u8   flags;
 724 } __attribute__ ((packed));
 725 
 726 /* cap release msg head */
 727 struct ceph_mds_cap_release {
 728         __le32 num;                /* number of cap_items that follow */
 729 } __attribute__ ((packed));
 730 
 731 struct ceph_mds_cap_item {
 732         __le64 ino;
 733         __le64 cap_id;
 734         __le32 migrate_seq, seq;
 735 } __attribute__ ((packed));
 736 
 737 #define CEPH_MDS_LEASE_REVOKE           1  /*    mds  -> client */
 738 #define CEPH_MDS_LEASE_RELEASE          2  /* client  -> mds    */
 739 #define CEPH_MDS_LEASE_RENEW            3  /* client <-> mds    */
 740 #define CEPH_MDS_LEASE_REVOKE_ACK       4  /* client  -> mds    */
 741 
 742 extern const char *ceph_lease_op_name(int o);
 743 
 744 /* lease msg header */
 745 struct ceph_mds_lease {
 746         __u8 action;            /* CEPH_MDS_LEASE_* */
 747         __le16 mask;            /* which lease */
 748         __le64 ino;
 749         __le64 first, last;     /* snap range */
 750         __le32 seq;
 751         __le32 duration_ms;     /* duration of renewal */
 752 } __attribute__ ((packed));
 753 /* followed by a __le32+string for dname */
 754 
 755 /* client reconnect */
 756 struct ceph_mds_cap_reconnect {
 757         __le64 cap_id;
 758         __le32 wanted;
 759         __le32 issued;
 760         __le64 snaprealm;
 761         __le64 pathbase;        /* base ino for our path to this ino */
 762         __le32 flock_len;       /* size of flock state blob, if any */
 763 } __attribute__ ((packed));
 764 /* followed by flock blob */
 765 
 766 struct ceph_mds_cap_reconnect_v1 {
 767         __le64 cap_id;
 768         __le32 wanted;
 769         __le32 issued;
 770         __le64 size;
 771         struct ceph_timespec mtime, atime;
 772         __le64 snaprealm;
 773         __le64 pathbase;        /* base ino for our path to this ino */
 774 } __attribute__ ((packed));
 775 
 776 struct ceph_mds_snaprealm_reconnect {
 777         __le64 ino;     /* snap realm base */
 778         __le64 seq;     /* snap seq for this snap realm */
 779         __le64 parent;  /* parent realm */
 780 } __attribute__ ((packed));
 781 
 782 /*
 783  * snaps
 784  */
 785 enum {
 786         CEPH_SNAP_OP_UPDATE,  /* CREATE or DESTROY */
 787         CEPH_SNAP_OP_CREATE,
 788         CEPH_SNAP_OP_DESTROY,
 789         CEPH_SNAP_OP_SPLIT,
 790 };
 791 
 792 extern const char *ceph_snap_op_name(int o);
 793 
 794 /* snap msg header */
 795 struct ceph_mds_snap_head {
 796         __le32 op;                /* CEPH_SNAP_OP_* */
 797         __le64 split;             /* ino to split off, if any */
 798         __le32 num_split_inos;    /* # inos belonging to new child realm */
 799         __le32 num_split_realms;  /* # child realms udner new child realm */
 800         __le32 trace_len;         /* size of snap trace blob */
 801 } __attribute__ ((packed));
 802 /* followed by split ino list, then split realms, then the trace blob */
 803 
 804 /*
 805  * encode info about a snaprealm, as viewed by a client
 806  */
 807 struct ceph_mds_snap_realm {
 808         __le64 ino;           /* ino */
 809         __le64 created;       /* snap: when created */
 810         __le64 parent;        /* ino: parent realm */
 811         __le64 parent_since;  /* snap: same parent since */
 812         __le64 seq;           /* snap: version */
 813         __le32 num_snaps;
 814         __le32 num_prior_parent_snaps;
 815 } __attribute__ ((packed));
 816 /* followed by my snap list, then prior parent snap list */
 817 
 818 /*
 819  * quotas
 820  */
 821 struct ceph_mds_quota {
 822         __le64 ino;             /* ino */
 823         struct ceph_timespec rctime;
 824         __le64 rbytes;          /* dir stats */
 825         __le64 rfiles;
 826         __le64 rsubdirs;
 827         __u8 struct_v;          /* compat */
 828         __u8 struct_compat;
 829         __le32 struct_len;
 830         __le64 max_bytes;       /* quota max. bytes */
 831         __le64 max_files;       /* quota max. files */
 832 } __attribute__ ((packed));
 833 
 834 #endif
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root/include/linux/ceph/ceph_fs.h

INCLUDED FROM
