include/linux/ceph/ceph_fs.h

   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_GLOBAL_SNAPREALM  3 /* global dummy snaprealm */
  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_MODE_NONE             0
  97 #define CEPH_AUTH_MODE_AUTHORIZER       1
  98 #define CEPH_AUTH_MODE_MON              10
  99
 100 /* msgr2 protocol modes */
 101 #define CEPH_CON_MODE_UNKNOWN   0x0
 102 #define CEPH_CON_MODE_CRC       0x1
 103 #define CEPH_CON_MODE_SECURE    0x2
 104
 105 #define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
 106
 107 const char *ceph_auth_proto_name(int proto);
 108 const char *ceph_con_mode_name(int mode);
 109
 110 /*********************************************
 111  * message layer
 112  */
 113
 114 /*
 115  * message types
 116  */
 117
 118 /* misc */
 119 #define CEPH_MSG_SHUTDOWN               1
 120 #define CEPH_MSG_PING                   2
 121
 122 /* client <-> monitor */
 123 #define CEPH_MSG_MON_MAP                4
 124 #define CEPH_MSG_MON_GET_MAP            5
 125 #define CEPH_MSG_STATFS                 13
 126 #define CEPH_MSG_STATFS_REPLY           14
 127 #define CEPH_MSG_MON_SUBSCRIBE          15
 128 #define CEPH_MSG_MON_SUBSCRIBE_ACK      16
 129 #define CEPH_MSG_AUTH                   17
 130 #define CEPH_MSG_AUTH_REPLY             18
 131 #define CEPH_MSG_MON_GET_VERSION        19
 132 #define CEPH_MSG_MON_GET_VERSION_REPLY  20
 133
 134 /* client <-> mds */
 135 #define CEPH_MSG_MDS_MAP                21
 136 #define CEPH_MSG_FS_MAP_USER            103
 137
 138 #define CEPH_MSG_CLIENT_SESSION         22
 139 #define CEPH_MSG_CLIENT_RECONNECT       23
 140
 141 #define CEPH_MSG_CLIENT_REQUEST         24
 142 #define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
 143 #define CEPH_MSG_CLIENT_REPLY           26
 144 #define CEPH_MSG_CLIENT_METRICS         29
 145 #define CEPH_MSG_CLIENT_CAPS            0x310
 146 #define CEPH_MSG_CLIENT_LEASE           0x311
 147 #define CEPH_MSG_CLIENT_SNAP            0x312
 148 #define CEPH_MSG_CLIENT_CAPRELEASE      0x313
 149 #define CEPH_MSG_CLIENT_QUOTA           0x314
 150
 151 /* pool ops */
 152 #define CEPH_MSG_POOLOP_REPLY           48
 153 #define CEPH_MSG_POOLOP                 49
 154
 155 /* mon commands */
 156 #define CEPH_MSG_MON_COMMAND            50
 157 #define CEPH_MSG_MON_COMMAND_ACK        51
 158
 159 /* osd */
 160 #define CEPH_MSG_OSD_MAP                41
 161 #define CEPH_MSG_OSD_OP                 42
 162 #define CEPH_MSG_OSD_OPREPLY            43
 163 #define CEPH_MSG_WATCH_NOTIFY           44
 164 #define CEPH_MSG_OSD_BACKOFF            61
 165
 166
 167 /* watch-notify operations */
 168 enum {
 169         CEPH_WATCH_EVENT_NOTIFY           = 1, /* notifying watcher */
 170         CEPH_WATCH_EVENT_NOTIFY_COMPLETE  = 2, /* notifier notified when done */
 171         CEPH_WATCH_EVENT_DISCONNECT       = 3, /* we were disconnected */
 172 };
 173
 174
 175 struct ceph_mon_request_header {
 176         __le64 have_version;
 177         __le16 session_mon;
 178         __le64 session_mon_tid;
 179 } __attribute__ ((packed));
 180
 181 struct ceph_mon_statfs {
 182         struct ceph_mon_request_header monhdr;
 183         struct ceph_fsid fsid;
 184         __u8 contains_data_pool;
 185         __le64 data_pool;
 186 } __attribute__ ((packed));
 187
 188 struct ceph_statfs {
 189         __le64 kb, kb_used, kb_avail;
 190         __le64 num_objects;
 191 } __attribute__ ((packed));
 192
 193 struct ceph_mon_statfs_reply {
 194         struct ceph_fsid fsid;
 195         __le64 version;
 196         struct ceph_statfs st;
 197 } __attribute__ ((packed));
 198
 199 struct ceph_mon_command {
 200         struct ceph_mon_request_header monhdr;
 201         struct ceph_fsid fsid;
 202         __le32 num_strs;         /* always 1 */
 203         __le32 str_len;
 204         char str[];
 205 } __attribute__ ((packed));
 206
 207 struct ceph_osd_getmap {
 208         struct ceph_mon_request_header monhdr;
 209         struct ceph_fsid fsid;
 210         __le32 start;
 211 } __attribute__ ((packed));
 212
 213 struct ceph_mds_getmap {
 214         struct ceph_mon_request_header monhdr;
 215         struct ceph_fsid fsid;
 216 } __attribute__ ((packed));
 217
 218 struct ceph_client_mount {
 219         struct ceph_mon_request_header monhdr;
 220 } __attribute__ ((packed));
 221
 222 #define CEPH_SUBSCRIBE_ONETIME    1  /* i want only 1 update after have */
 223
 224 struct ceph_mon_subscribe_item {
 225         __le64 start;
 226         __u8 flags;
 227 } __attribute__ ((packed));
 228
 229 struct ceph_mon_subscribe_ack {
 230         __le32 duration;         /* seconds */
 231         struct ceph_fsid fsid;
 232 } __attribute__ ((packed));
 233
 234 #define CEPH_FS_CLUSTER_ID_NONE  -1
 235
 236 /*
 237  * mdsmap flags
 238  */
 239 #define CEPH_MDSMAP_DOWN    (1<<0)  /* cluster deliberately down */
 240
 241 /*
 242  * mds states
 243  *   > 0 -> in
 244  *  <= 0 -> out
 245  */
 246 #define CEPH_MDS_STATE_DNE          0  /* down, does not exist. */
 247 #define CEPH_MDS_STATE_STOPPED     -1  /* down, once existed, but no subtrees.
 248                                           empty log. */
 249 #define CEPH_MDS_STATE_BOOT        -4  /* up, boot announcement. */
 250 #define CEPH_MDS_STATE_STANDBY     -5  /* up, idle.  waiting for assignment. */
 251 #define CEPH_MDS_STATE_CREATING    -6  /* up, creating MDS instance. */
 252 #define CEPH_MDS_STATE_STARTING    -7  /* up, starting previously stopped mds */
 253 #define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
 254 #define CEPH_MDS_STATE_REPLAYONCE   -9 /* up, replaying an active node's journal */
 255
 256 #define CEPH_MDS_STATE_REPLAY       8  /* up, replaying journal. */
 257 #define CEPH_MDS_STATE_RESOLVE      9  /* up, disambiguating distributed
 258                                           operations (import, rename, etc.) */
 259 #define CEPH_MDS_STATE_RECONNECT    10 /* up, reconnect to clients */
 260 #define CEPH_MDS_STATE_REJOIN       11 /* up, rejoining distributed cache */
 261 #define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
 262 #define CEPH_MDS_STATE_ACTIVE       13 /* up, active */
 263 #define CEPH_MDS_STATE_STOPPING     14 /* up, but exporting metadata */
 264
 265 extern const char *ceph_mds_state_name(int s);
 266
 267
 268 /*
 269  * metadata lock types.
 270  *  - these are bitmasks.. we can compose them
 271  *  - they also define the lock ordering by the MDS
 272  *  - a few of these are internal to the mds
 273  */
 274 #define CEPH_LOCK_DVERSION    1
 275 #define CEPH_LOCK_DN          2
 276 #define CEPH_LOCK_ISNAP       16
 277 #define CEPH_LOCK_IVERSION    32    /* mds internal */
 278 #define CEPH_LOCK_IFILE       64
 279 #define CEPH_LOCK_IAUTH       128
 280 #define CEPH_LOCK_ILINK       256
 281 #define CEPH_LOCK_IDFT        512   /* dir frag tree */
 282 #define CEPH_LOCK_INEST       1024  /* mds internal */
 283 #define CEPH_LOCK_IXATTR      2048
 284 #define CEPH_LOCK_IFLOCK      4096  /* advisory file locks */
 285 #define CEPH_LOCK_INO         8192  /* immutable inode bits; not a lock */
 286 #define CEPH_LOCK_IPOLICY     16384 /* policy lock on dirs. MDS internal */
 287
 288 /* client_session ops */
 289 enum {
 290         CEPH_SESSION_REQUEST_OPEN,
 291         CEPH_SESSION_OPEN,
 292         CEPH_SESSION_REQUEST_CLOSE,
 293         CEPH_SESSION_CLOSE,
 294         CEPH_SESSION_REQUEST_RENEWCAPS,
 295         CEPH_SESSION_RENEWCAPS,
 296         CEPH_SESSION_STALE,
 297         CEPH_SESSION_RECALL_STATE,
 298         CEPH_SESSION_FLUSHMSG,
 299         CEPH_SESSION_FLUSHMSG_ACK,
 300         CEPH_SESSION_FORCE_RO,
 301         CEPH_SESSION_REJECT,
 302         CEPH_SESSION_REQUEST_FLUSH_MDLOG,
 303 };
 304
 305 #define CEPH_SESSION_BLOCKLISTED        (1 << 0)  /* session blocklisted */
 306
 307 extern const char *ceph_session_op_name(int op);
 308
 309 struct ceph_mds_session_head {
 310         __le32 op;
 311         __le64 seq;
 312         struct ceph_timespec stamp;
 313         __le32 max_caps, max_leases;
 314 } __attribute__ ((packed));
 315
 316 /* client_request */
 317 /*
 318  * metadata ops.
 319  *  & 0x001000 -> write op
 320  *  & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
 321  &  & 0x100000 -> use weird ino/path trace
 322  */
 323 #define CEPH_MDS_OP_WRITE        0x001000
 324 enum {
 325         CEPH_MDS_OP_LOOKUP     = 0x00100,
 326         CEPH_MDS_OP_GETATTR    = 0x00101,
 327         CEPH_MDS_OP_LOOKUPHASH = 0x00102,
 328         CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
 329         CEPH_MDS_OP_LOOKUPINO  = 0x00104,
 330         CEPH_MDS_OP_LOOKUPNAME = 0x00105,
 331         CEPH_MDS_OP_GETVXATTR  = 0x00106,
 332
 333         CEPH_MDS_OP_SETXATTR   = 0x01105,
 334         CEPH_MDS_OP_RMXATTR    = 0x01106,
 335         CEPH_MDS_OP_SETLAYOUT  = 0x01107,
 336         CEPH_MDS_OP_SETATTR    = 0x01108,
 337         CEPH_MDS_OP_SETFILELOCK= 0x01109,
 338         CEPH_MDS_OP_GETFILELOCK= 0x00110,
 339         CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
 340
 341         CEPH_MDS_OP_MKNOD      = 0x01201,
 342         CEPH_MDS_OP_LINK       = 0x01202,
 343         CEPH_MDS_OP_UNLINK     = 0x01203,
 344         CEPH_MDS_OP_RENAME     = 0x01204,
 345         CEPH_MDS_OP_MKDIR      = 0x01220,
 346         CEPH_MDS_OP_RMDIR      = 0x01221,
 347         CEPH_MDS_OP_SYMLINK    = 0x01222,
 348
 349         CEPH_MDS_OP_CREATE     = 0x01301,
 350         CEPH_MDS_OP_OPEN       = 0x00302,
 351         CEPH_MDS_OP_READDIR    = 0x00305,
 352
 353         CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
 354         CEPH_MDS_OP_MKSNAP     = 0x01400,
 355         CEPH_MDS_OP_RMSNAP     = 0x01401,
 356         CEPH_MDS_OP_LSSNAP     = 0x00402,
 357         CEPH_MDS_OP_RENAMESNAP = 0x01403,
 358 };
 359
 360 extern const char *ceph_mds_op_name(int op);
 361
 362 #define CEPH_SETATTR_MODE              (1 << 0)
 363 #define CEPH_SETATTR_UID               (1 << 1)
 364 #define CEPH_SETATTR_GID               (1 << 2)
 365 #define CEPH_SETATTR_MTIME             (1 << 3)
 366 #define CEPH_SETATTR_ATIME             (1 << 4)
 367 #define CEPH_SETATTR_SIZE              (1 << 5)
 368 #define CEPH_SETATTR_CTIME             (1 << 6)
 369 #define CEPH_SETATTR_MTIME_NOW         (1 << 7)
 370 #define CEPH_SETATTR_ATIME_NOW         (1 << 8)
 371 #define CEPH_SETATTR_BTIME             (1 << 9)
 372 #define CEPH_SETATTR_KILL_SGUID        (1 << 10)
 373 #define CEPH_SETATTR_FSCRYPT_AUTH      (1 << 11)
 374 #define CEPH_SETATTR_FSCRYPT_FILE      (1 << 12)
 375
 376 /*
 377  * Ceph setxattr request flags.
 378  */
 379 #define CEPH_XATTR_CREATE  (1 << 0)
 380 #define CEPH_XATTR_REPLACE (1 << 1)
 381 #define CEPH_XATTR_REMOVE  (1 << 31)
 382
 383 /*
 384  * readdir request flags;
 385  */
 386 #define CEPH_READDIR_REPLY_BITFLAGS     (1<<0)
 387
 388 /*
 389  * readdir reply flags.
 390  */
 391 #define CEPH_READDIR_FRAG_END           (1<<0)
 392 #define CEPH_READDIR_FRAG_COMPLETE      (1<<8)
 393 #define CEPH_READDIR_HASH_ORDER         (1<<9)
 394 #define CEPH_READDIR_OFFSET_HASH        (1<<10)
 395
 396 /*
 397  * open request flags
 398  */
 399 #define CEPH_O_RDONLY           00000000
 400 #define CEPH_O_WRONLY           00000001
 401 #define CEPH_O_RDWR             00000002
 402 #define CEPH_O_CREAT            00000100
 403 #define CEPH_O_EXCL             00000200
 404 #define CEPH_O_TRUNC            00001000
 405 #define CEPH_O_DIRECTORY        00200000
 406 #define CEPH_O_NOFOLLOW         00400000
 407
 408 union ceph_mds_request_args {
 409         struct {
 410                 __le32 mask;                 /* CEPH_CAP_* */
 411         } __attribute__ ((packed)) getattr;
 412         struct {
 413                 __le32 mode;
 414                 __le32 uid;
 415                 __le32 gid;
 416                 struct ceph_timespec mtime;
 417                 struct ceph_timespec atime;
 418                 __le64 size, old_size;       /* old_size needed by truncate */
 419                 __le32 mask;                 /* CEPH_SETATTR_* */
 420         } __attribute__ ((packed)) setattr;
 421         struct {
 422                 __le32 frag;                 /* which dir fragment */
 423                 __le32 max_entries;          /* how many dentries to grab */
 424                 __le32 max_bytes;
 425                 __le16 flags;
 426                 __le32 offset_hash;
 427         } __attribute__ ((packed)) readdir;
 428         struct {
 429                 __le32 mode;
 430                 __le32 rdev;
 431         } __attribute__ ((packed)) mknod;
 432         struct {
 433                 __le32 mode;
 434         } __attribute__ ((packed)) mkdir;
 435         struct {
 436                 __le32 flags;
 437                 __le32 mode;
 438                 __le32 stripe_unit;          /* layout for newly created file */
 439                 __le32 stripe_count;         /* ... */
 440                 __le32 object_size;
 441                 __le32 pool;
 442                 __le32 mask;                 /* CEPH_CAP_* */
 443                 __le64 old_size;
 444         } __attribute__ ((packed)) open;
 445         struct {
 446                 __le32 flags;
 447                 __le32 osdmap_epoch; /* used for setting file/dir layouts */
 448         } __attribute__ ((packed)) setxattr;
 449         struct {
 450                 struct ceph_file_layout_legacy layout;
 451         } __attribute__ ((packed)) setlayout;
 452         struct {
 453                 __u8 rule; /* currently fcntl or flock */
 454                 __u8 type; /* shared, exclusive, remove*/
 455                 __le64 owner; /* owner of the lock */
 456                 __le64 pid; /* process id requesting the lock */
 457                 __le64 start; /* initial location to lock */
 458                 __le64 length; /* num bytes to lock from start */
 459                 __u8 wait; /* will caller wait for lock to become available? */
 460         } __attribute__ ((packed)) filelock_change;
 461         struct {
 462                 __le32 mask;                 /* CEPH_CAP_* */
 463                 __le64 snapid;
 464                 __le64 parent;
 465                 __le32 hash;
 466         } __attribute__ ((packed)) lookupino;
 467 } __attribute__ ((packed));
 468
 469 union ceph_mds_request_args_ext {
 470         union {
 471                 union ceph_mds_request_args old;
 472                 struct {
 473                         __le32 mode;
 474                         __le32 uid;
 475                         __le32 gid;
 476                         struct ceph_timespec mtime;
 477                         struct ceph_timespec atime;
 478                         __le64 size, old_size;       /* old_size needed by truncate */
 479                         __le32 mask;                 /* CEPH_SETATTR_* */
 480                         struct ceph_timespec btime;
 481                 } __attribute__ ((packed)) setattr_ext;
 482         };
 483 };
 484
 485 #define CEPH_MDS_FLAG_REPLAY            1 /* this is a replayed op */
 486 #define CEPH_MDS_FLAG_WANT_DENTRY       2 /* want dentry in reply */
 487 #define CEPH_MDS_FLAG_ASYNC             4 /* request is asynchronous */
 488
 489 struct ceph_mds_request_head_legacy {
 490         __le64 oldest_client_tid;
 491         __le32 mdsmap_epoch;           /* on client */
 492         __le32 flags;                  /* CEPH_MDS_FLAG_* */
 493         __u8 num_retry, num_fwd;       /* count retry, fwd attempts */
 494         __le16 num_releases;           /* # include cap/lease release records */
 495         __le32 op;                     /* mds op code */
 496         __le32 caller_uid, caller_gid;
 497         __le64 ino;                    /* use this ino for openc, mkdir, mknod,
 498                                           etc. (if replaying) */
 499         union ceph_mds_request_args args;
 500 } __attribute__ ((packed));
 501
 502 #define CEPH_MDS_REQUEST_HEAD_VERSION  2
 503
 504 struct ceph_mds_request_head_old {
 505         __le16 version;                /* struct version */
 506         __le64 oldest_client_tid;
 507         __le32 mdsmap_epoch;           /* on client */
 508         __le32 flags;                  /* CEPH_MDS_FLAG_* */
 509         __u8 num_retry, num_fwd;       /* count retry, fwd attempts */
 510         __le16 num_releases;           /* # include cap/lease release records */
 511         __le32 op;                     /* mds op code */
 512         __le32 caller_uid, caller_gid;
 513         __le64 ino;                    /* use this ino for openc, mkdir, mknod,
 514                                           etc. (if replaying) */
 515         union ceph_mds_request_args_ext args;
 516 } __attribute__ ((packed));
 517
 518 struct ceph_mds_request_head {
 519         __le16 version;                /* struct version */
 520         __le64 oldest_client_tid;
 521         __le32 mdsmap_epoch;           /* on client */
 522         __le32 flags;                  /* CEPH_MDS_FLAG_* */
 523         __u8 num_retry, num_fwd;       /* legacy count retry and fwd attempts */
 524         __le16 num_releases;           /* # include cap/lease release records */
 525         __le32 op;                     /* mds op code */
 526         __le32 caller_uid, caller_gid;
 527         __le64 ino;                    /* use this ino for openc, mkdir, mknod,
 528                                           etc. (if replaying) */
 529         union ceph_mds_request_args_ext args;
 530
 531         __le32 ext_num_retry;          /* new count retry attempts */
 532         __le32 ext_num_fwd;            /* new count fwd attempts */
 533 } __attribute__ ((packed));
 534
 535 /* cap/lease release record */
 536 struct ceph_mds_request_release {
 537         __le64 ino, cap_id;            /* ino and unique cap id */
 538         __le32 caps, wanted;           /* new issued, wanted */
 539         __le32 seq, issue_seq, mseq;
 540         __le32 dname_seq;              /* if releasing a dentry lease, a */
 541         __le32 dname_len;              /* string follows. */
 542 } __attribute__ ((packed));
 543
 544 /* client reply */
 545 struct ceph_mds_reply_head {
 546         __le32 op;
 547         __le32 result;
 548         __le32 mdsmap_epoch;
 549         __u8 safe;                     /* true if committed to disk */
 550         __u8 is_dentry, is_target;     /* true if dentry, target inode records
 551                                           are included with reply */
 552 } __attribute__ ((packed));
 553
 554 /* one for each node split */
 555 struct ceph_frag_tree_split {
 556         __le32 frag;                   /* this frag splits... */
 557         __le32 by;                     /* ...by this many bits */
 558 } __attribute__ ((packed));
 559
 560 struct ceph_frag_tree_head {
 561         __le32 nsplits;                /* num ceph_frag_tree_split records */
 562         struct ceph_frag_tree_split splits[];
 563 } __attribute__ ((packed));
 564
 565 /* capability issue, for bundling with mds reply */
 566 struct ceph_mds_reply_cap {
 567         __le32 caps, wanted;           /* caps issued, wanted */
 568         __le64 cap_id;
 569         __le32 seq, mseq;
 570         __le64 realm;                  /* snap realm */
 571         __u8 flags;                    /* CEPH_CAP_FLAG_* */
 572 } __attribute__ ((packed));
 573
 574 #define CEPH_CAP_FLAG_AUTH      (1 << 0)  /* cap is issued by auth mds */
 575 #define CEPH_CAP_FLAG_RELEASE   (1 << 1)  /* release the cap */
 576
 577 /* inode record, for bundling with mds reply */
 578 struct ceph_mds_reply_inode {
 579         __le64 ino;
 580         __le64 snapid;
 581         __le32 rdev;
 582         __le64 version;                /* inode version */
 583         __le64 xattr_version;          /* version for xattr blob */
 584         struct ceph_mds_reply_cap cap; /* caps issued for this inode */
 585         struct ceph_file_layout_legacy layout;
 586         struct ceph_timespec ctime, mtime, atime;
 587         __le32 time_warp_seq;
 588         __le64 size, max_size, truncate_size;
 589         __le32 truncate_seq;
 590         __le32 mode, uid, gid;
 591         __le32 nlink;
 592         __le64 files, subdirs, rbytes, rfiles, rsubdirs;  /* dir stats */
 593         struct ceph_timespec rctime;
 594         struct ceph_frag_tree_head fragtree;  /* (must be at end of struct) */
 595 } __attribute__ ((packed));
 596 /* followed by frag array, symlink string, dir layout, xattr blob */
 597
 598 /* reply_lease follows dname, and reply_inode */
 599 struct ceph_mds_reply_lease {
 600         __le16 mask;            /* lease type(s) */
 601         __le32 duration_ms;     /* lease duration */
 602         __le32 seq;
 603 } __attribute__ ((packed));
 604
 605 #define CEPH_LEASE_VALID        (1 | 2) /* old and new bit values */
 606 #define CEPH_LEASE_PRIMARY_LINK 4       /* primary linkage */
 607
 608 struct ceph_mds_reply_dirfrag {
 609         __le32 frag;            /* fragment */
 610         __le32 auth;            /* auth mds, if this is a delegation point */
 611         __le32 ndist;           /* number of mds' this is replicated on */
 612         __le32 dist[];
 613 } __attribute__ ((packed));
 614
 615 #define CEPH_LOCK_FCNTL         1
 616 #define CEPH_LOCK_FLOCK         2
 617 #define CEPH_LOCK_FCNTL_INTR    3
 618 #define CEPH_LOCK_FLOCK_INTR    4
 619
 620
 621 #define CEPH_LOCK_SHARED   1
 622 #define CEPH_LOCK_EXCL     2
 623 #define CEPH_LOCK_UNLOCK   4
 624
 625 struct ceph_filelock {
 626         __le64 start;/* file offset to start lock at */
 627         __le64 length; /* num bytes to lock; 0 for all following start */
 628         __le64 client; /* which client holds the lock */
 629         __le64 owner; /* owner the lock */
 630         __le64 pid; /* process id holding the lock on the client */
 631         __u8 type; /* shared lock, exclusive lock, or unlock */
 632 } __attribute__ ((packed));
 633
 634
 635 /* file access modes */
 636 #define CEPH_FILE_MODE_PIN        0
 637 #define CEPH_FILE_MODE_RD         1
 638 #define CEPH_FILE_MODE_WR         2
 639 #define CEPH_FILE_MODE_RDWR       3  /* RD | WR */
 640 #define CEPH_FILE_MODE_LAZY       4  /* lazy io */
 641 #define CEPH_FILE_MODE_BITS       4
 642 #define CEPH_FILE_MODE_MASK       ((1 << CEPH_FILE_MODE_BITS) - 1)
 643
 644 int ceph_flags_to_mode(int flags);
 645
 646 #define CEPH_INLINE_NONE        ((__u64)-1)
 647
 648 /* capability bits */
 649 #define CEPH_CAP_PIN         1  /* no specific capabilities beyond the pin */
 650
 651 /* generic cap bits */
 652 #define CEPH_CAP_GSHARED     1  /* client can reads */
 653 #define CEPH_CAP_GEXCL       2  /* client can read and update */
 654 #define CEPH_CAP_GCACHE      4  /* (file) client can cache reads */
 655 #define CEPH_CAP_GRD         8  /* (file) client can read */
 656 #define CEPH_CAP_GWR        16  /* (file) client can write */
 657 #define CEPH_CAP_GBUFFER    32  /* (file) client can buffer writes */
 658 #define CEPH_CAP_GWREXTEND  64  /* (file) client can extend EOF */
 659 #define CEPH_CAP_GLAZYIO   128  /* (file) client can perform lazy io */
 660
 661 #define CEPH_CAP_SIMPLE_BITS  2
 662 #define CEPH_CAP_FILE_BITS    8
 663
 664 /* per-lock shift */
 665 #define CEPH_CAP_SAUTH      2
 666 #define CEPH_CAP_SLINK      4
 667 #define CEPH_CAP_SXATTR     6
 668 #define CEPH_CAP_SFILE      8
 669 #define CEPH_CAP_SFLOCK    20
 670
 671 #define CEPH_CAP_BITS      22
 672
 673 /* composed values */
 674 #define CEPH_CAP_AUTH_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SAUTH)
 675 #define CEPH_CAP_AUTH_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SAUTH)
 676 #define CEPH_CAP_LINK_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SLINK)
 677 #define CEPH_CAP_LINK_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SLINK)
 678 #define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED  << CEPH_CAP_SXATTR)
 679 #define CEPH_CAP_XATTR_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SXATTR)
 680 #define CEPH_CAP_FILE(x)    (x << CEPH_CAP_SFILE)
 681 #define CEPH_CAP_FILE_SHARED   (CEPH_CAP_GSHARED   << CEPH_CAP_SFILE)
 682 #define CEPH_CAP_FILE_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SFILE)
 683 #define CEPH_CAP_FILE_CACHE    (CEPH_CAP_GCACHE    << CEPH_CAP_SFILE)
 684 #define CEPH_CAP_FILE_RD       (CEPH_CAP_GRD       << CEPH_CAP_SFILE)
 685 #define CEPH_CAP_FILE_WR       (CEPH_CAP_GWR       << CEPH_CAP_SFILE)
 686 #define CEPH_CAP_FILE_BUFFER   (CEPH_CAP_GBUFFER   << CEPH_CAP_SFILE)
 687 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
 688 #define CEPH_CAP_FILE_LAZYIO   (CEPH_CAP_GLAZYIO   << CEPH_CAP_SFILE)
 689 #define CEPH_CAP_FLOCK_SHARED  (CEPH_CAP_GSHARED   << CEPH_CAP_SFLOCK)
 690 #define CEPH_CAP_FLOCK_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SFLOCK)
 691
 692
 693 /* cap masks (for getattr) */
 694 #define CEPH_STAT_CAP_INODE    CEPH_CAP_PIN
 695 #define CEPH_STAT_CAP_TYPE     CEPH_CAP_PIN  /* mode >> 12 */
 696 #define CEPH_STAT_CAP_SYMLINK  CEPH_CAP_PIN
 697 #define CEPH_STAT_CAP_UID      CEPH_CAP_AUTH_SHARED
 698 #define CEPH_STAT_CAP_GID      CEPH_CAP_AUTH_SHARED
 699 #define CEPH_STAT_CAP_MODE     CEPH_CAP_AUTH_SHARED
 700 #define CEPH_STAT_CAP_NLINK    CEPH_CAP_LINK_SHARED
 701 #define CEPH_STAT_CAP_LAYOUT   CEPH_CAP_FILE_SHARED
 702 #define CEPH_STAT_CAP_MTIME    CEPH_CAP_FILE_SHARED
 703 #define CEPH_STAT_CAP_SIZE     CEPH_CAP_FILE_SHARED
 704 #define CEPH_STAT_CAP_ATIME    CEPH_CAP_FILE_SHARED  /* fixme */
 705 #define CEPH_STAT_CAP_XATTR    CEPH_CAP_XATTR_SHARED
 706 #define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN |                 \
 707                                  CEPH_CAP_AUTH_SHARED | \
 708                                  CEPH_CAP_LINK_SHARED | \
 709                                  CEPH_CAP_FILE_SHARED | \
 710                                  CEPH_CAP_XATTR_SHARED)
 711 #define CEPH_STAT_CAP_INLINE_DATA (CEPH_CAP_FILE_SHARED | \
 712                                    CEPH_CAP_FILE_RD)
 713 #define CEPH_STAT_RSTAT CEPH_CAP_FILE_WREXTEND
 714
 715 #define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED |                     \
 716                               CEPH_CAP_LINK_SHARED |                    \
 717                               CEPH_CAP_XATTR_SHARED |                   \
 718                               CEPH_CAP_FILE_SHARED)
 719 #define CEPH_CAP_ANY_RD   (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD |     \
 720                            CEPH_CAP_FILE_CACHE)
 721
 722 #define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL |         \
 723                            CEPH_CAP_LINK_EXCL |         \
 724                            CEPH_CAP_XATTR_EXCL |        \
 725                            CEPH_CAP_FILE_EXCL)
 726 #define CEPH_CAP_ANY_FILE_RD (CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | \
 727                               CEPH_CAP_FILE_SHARED)
 728 #define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
 729                               CEPH_CAP_FILE_EXCL)
 730 #define CEPH_CAP_ANY_WR   (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
 731 #define CEPH_CAP_ANY      (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
 732                            CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
 733                            CEPH_CAP_PIN)
 734 #define CEPH_CAP_ALL_FILE (CEPH_CAP_PIN | CEPH_CAP_ANY_SHARED | \
 735                            CEPH_CAP_AUTH_EXCL | CEPH_CAP_XATTR_EXCL | \
 736                            CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)
 737
 738 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
 739                         CEPH_LOCK_IXATTR)
 740
 741 /* cap masks async dir operations */
 742 #define CEPH_CAP_DIR_CREATE     CEPH_CAP_FILE_CACHE
 743 #define CEPH_CAP_DIR_UNLINK     CEPH_CAP_FILE_RD
 744 #define CEPH_CAP_ANY_DIR_OPS    (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | \
 745                                  CEPH_CAP_FILE_WREXTEND | CEPH_CAP_FILE_LAZYIO)
 746
 747 int ceph_caps_for_mode(int mode);
 748
 749 enum {
 750         CEPH_CAP_OP_GRANT,         /* mds->client grant */
 751         CEPH_CAP_OP_REVOKE,        /* mds->client revoke */
 752         CEPH_CAP_OP_TRUNC,         /* mds->client trunc notify */
 753         CEPH_CAP_OP_EXPORT,        /* mds has exported the cap */
 754         CEPH_CAP_OP_IMPORT,        /* mds has imported the cap */
 755         CEPH_CAP_OP_UPDATE,        /* client->mds update */
 756         CEPH_CAP_OP_DROP,          /* client->mds drop cap bits */
 757         CEPH_CAP_OP_FLUSH,         /* client->mds cap writeback */
 758         CEPH_CAP_OP_FLUSH_ACK,     /* mds->client flushed */
 759         CEPH_CAP_OP_FLUSHSNAP,     /* client->mds flush snapped metadata */
 760         CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
 761         CEPH_CAP_OP_RELEASE,       /* client->mds release (clean) cap */
 762         CEPH_CAP_OP_RENEW,         /* client->mds renewal request */
 763 };
 764
 765 extern const char *ceph_cap_op_name(int op);
 766
 767 /* flags field in client cap messages (version >= 10) */
 768 #define CEPH_CLIENT_CAPS_SYNC                   (1<<0)
 769 #define CEPH_CLIENT_CAPS_NO_CAPSNAP             (1<<1)
 770 #define CEPH_CLIENT_CAPS_PENDING_CAPSNAP        (1<<2)
 771
 772 /*
 773  * caps message, used for capability callbacks, acks, requests, etc.
 774  */
 775 struct ceph_mds_caps {
 776         __le32 op;                  /* CEPH_CAP_OP_* */
 777         __le64 ino, realm;
 778         __le64 cap_id;
 779         __le32 seq, issue_seq;
 780         __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
 781         __le32 migrate_seq;
 782         __le64 snap_follows;
 783         __le32 snap_trace_len;
 784
 785         /* authlock */
 786         __le32 uid, gid, mode;
 787
 788         /* linklock */
 789         __le32 nlink;
 790
 791         /* xattrlock */
 792         __le32 xattr_len;
 793         __le64 xattr_version;
 794
 795         /* a union of non-export and export bodies. */
 796         __le64 size, max_size, truncate_size;
 797         __le32 truncate_seq;
 798         struct ceph_timespec mtime, atime, ctime;
 799         struct ceph_file_layout_legacy layout;
 800         __le32 time_warp_seq;
 801 } __attribute__ ((packed));
 802
 803 struct ceph_mds_cap_peer {
 804         __le64 cap_id;
 805         __le32 seq;
 806         __le32 mseq;
 807         __le32 mds;
 808         __u8   flags;
 809 } __attribute__ ((packed));
 810
 811 /* cap release msg head */
 812 struct ceph_mds_cap_release {
 813         __le32 num;                /* number of cap_items that follow */
 814 } __attribute__ ((packed));
 815
 816 struct ceph_mds_cap_item {
 817         __le64 ino;
 818         __le64 cap_id;
 819         __le32 migrate_seq, seq;
 820 } __attribute__ ((packed));
 821
 822 #define CEPH_MDS_LEASE_REVOKE           1  /*    mds  -> client */
 823 #define CEPH_MDS_LEASE_RELEASE          2  /* client  -> mds    */
 824 #define CEPH_MDS_LEASE_RENEW            3  /* client <-> mds    */
 825 #define CEPH_MDS_LEASE_REVOKE_ACK       4  /* client  -> mds    */
 826
 827 extern const char *ceph_lease_op_name(int o);
 828
 829 /* lease msg header */
 830 struct ceph_mds_lease {
 831         __u8 action;            /* CEPH_MDS_LEASE_* */
 832         __le16 mask;            /* which lease */
 833         __le64 ino;
 834         __le64 first, last;     /* snap range */
 835         __le32 seq;
 836         __le32 duration_ms;     /* duration of renewal */
 837 } __attribute__ ((packed));
 838 /* followed by a __le32+string for dname */
 839
 840 /* client reconnect */
 841 struct ceph_mds_cap_reconnect {
 842         __le64 cap_id;
 843         __le32 wanted;
 844         __le32 issued;
 845         __le64 snaprealm;
 846         __le64 pathbase;        /* base ino for our path to this ino */
 847         __le32 flock_len;       /* size of flock state blob, if any */
 848 } __attribute__ ((packed));
 849 /* followed by flock blob */
 850
 851 struct ceph_mds_cap_reconnect_v1 {
 852         __le64 cap_id;
 853         __le32 wanted;
 854         __le32 issued;
 855         __le64 size;
 856         struct ceph_timespec mtime, atime;
 857         __le64 snaprealm;
 858         __le64 pathbase;        /* base ino for our path to this ino */
 859 } __attribute__ ((packed));
 860
 861 struct ceph_mds_snaprealm_reconnect {
 862         __le64 ino;     /* snap realm base */
 863         __le64 seq;     /* snap seq for this snap realm */
 864         __le64 parent;  /* parent realm */
 865 } __attribute__ ((packed));
 866
 867 /*
 868  * snaps
 869  */
 870 enum {
 871         CEPH_SNAP_OP_UPDATE,  /* CREATE or DESTROY */
 872         CEPH_SNAP_OP_CREATE,
 873         CEPH_SNAP_OP_DESTROY,
 874         CEPH_SNAP_OP_SPLIT,
 875 };
 876
 877 extern const char *ceph_snap_op_name(int o);
 878
 879 /* snap msg header */
 880 struct ceph_mds_snap_head {
 881         __le32 op;                /* CEPH_SNAP_OP_* */
 882         __le64 split;             /* ino to split off, if any */
 883         __le32 num_split_inos;    /* # inos belonging to new child realm */
 884         __le32 num_split_realms;  /* # child realms udner new child realm */
 885         __le32 trace_len;         /* size of snap trace blob */
 886 } __attribute__ ((packed));
 887 /* followed by split ino list, then split realms, then the trace blob */
 888
 889 /*
 890  * encode info about a snaprealm, as viewed by a client
 891  */
 892 struct ceph_mds_snap_realm {
 893         __le64 ino;           /* ino */
 894         __le64 created;       /* snap: when created */
 895         __le64 parent;        /* ino: parent realm */
 896         __le64 parent_since;  /* snap: same parent since */
 897         __le64 seq;           /* snap: version */
 898         __le32 num_snaps;
 899         __le32 num_prior_parent_snaps;
 900 } __attribute__ ((packed));
 901 /* followed by my snap list, then prior parent snap list */
 902
 903 /*
 904  * quotas
 905  */
 906 struct ceph_mds_quota {
 907         __le64 ino;             /* ino */
 908         struct ceph_timespec rctime;
 909         __le64 rbytes;          /* dir stats */
 910         __le64 rfiles;
 911         __le64 rsubdirs;
 912         __u8 struct_v;          /* compat */
 913         __u8 struct_compat;
 914         __le32 struct_len;
 915         __le64 max_bytes;       /* quota max. bytes */
 916         __le64 max_files;       /* quota max. files */
 917 } __attribute__ ((packed));
 918
 919 #endif