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 835
