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