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.
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
42 #define CEPH_FEATURE_UID (1<<0)
43 #define CEPH_FEATURE_NOSRCADDR (1<<1)
44 #define CEPH_FEATURE_MONCLOCKCHECK (1<<2)
45 #define CEPH_FEATURE_FLOCK (1<<3)
49 * ceph_file_layout - describe data layout for a file/inode
51 struct ceph_file_layout {
52 /* file -> object mapping */
53 __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
55 __le32 fl_stripe_count; /* over this many objects */
56 __le32 fl_object_size; /* until objects are this big, then move to
58 __le32 fl_cas_hash; /* 0 = none; 1 = sha256 */
60 /* pg -> disk layout */
61 __le32 fl_object_stripe_unit; /* for per-object parity, if any */
63 /* object -> pg layout */
64 __le32 fl_pg_preferred; /* preferred primary for pg (-1 for none) */
65 __le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
66 } __attribute__ ((packed));
68 #define CEPH_MIN_STRIPE_UNIT 65536
70 int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
73 /* crypto algorithms */
74 #define CEPH_CRYPTO_NONE 0x0
75 #define CEPH_CRYPTO_AES 0x1
77 #define CEPH_AES_IV "cephsageyudagreg"
79 /* security/authentication protocols */
80 #define CEPH_AUTH_UNKNOWN 0x0
81 #define CEPH_AUTH_NONE 0x1
82 #define CEPH_AUTH_CEPHX 0x2
84 #define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
87 /*********************************************
96 #define CEPH_MSG_SHUTDOWN 1
97 #define CEPH_MSG_PING 2
99 /* client <-> monitor */
100 #define CEPH_MSG_MON_MAP 4
101 #define CEPH_MSG_MON_GET_MAP 5
102 #define CEPH_MSG_STATFS 13
103 #define CEPH_MSG_STATFS_REPLY 14
104 #define CEPH_MSG_MON_SUBSCRIBE 15
105 #define CEPH_MSG_MON_SUBSCRIBE_ACK 16
106 #define CEPH_MSG_AUTH 17
107 #define CEPH_MSG_AUTH_REPLY 18
110 #define CEPH_MSG_MDS_MAP 21
112 #define CEPH_MSG_CLIENT_SESSION 22
113 #define CEPH_MSG_CLIENT_RECONNECT 23
115 #define CEPH_MSG_CLIENT_REQUEST 24
116 #define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
117 #define CEPH_MSG_CLIENT_REPLY 26
118 #define CEPH_MSG_CLIENT_CAPS 0x310
119 #define CEPH_MSG_CLIENT_LEASE 0x311
120 #define CEPH_MSG_CLIENT_SNAP 0x312
121 #define CEPH_MSG_CLIENT_CAPRELEASE 0x313
124 #define CEPH_MSG_POOLOP_REPLY 48
125 #define CEPH_MSG_POOLOP 49
129 #define CEPH_MSG_OSD_MAP 41
130 #define CEPH_MSG_OSD_OP 42
131 #define CEPH_MSG_OSD_OPREPLY 43
133 /* pool operations */
135 POOL_OP_CREATE = 0x01,
136 POOL_OP_DELETE = 0x02,
137 POOL_OP_AUID_CHANGE = 0x03,
138 POOL_OP_CREATE_SNAP = 0x11,
139 POOL_OP_DELETE_SNAP = 0x12,
140 POOL_OP_CREATE_UNMANAGED_SNAP = 0x21,
141 POOL_OP_DELETE_UNMANAGED_SNAP = 0x22,
144 struct ceph_mon_request_header {
147 __le64 session_mon_tid;
148 } __attribute__ ((packed));
150 struct ceph_mon_statfs {
151 struct ceph_mon_request_header monhdr;
152 struct ceph_fsid fsid;
153 } __attribute__ ((packed));
156 __le64 kb, kb_used, kb_avail;
158 } __attribute__ ((packed));
160 struct ceph_mon_statfs_reply {
161 struct ceph_fsid fsid;
163 struct ceph_statfs st;
164 } __attribute__ ((packed));
166 const char *ceph_pool_op_name(int op);
168 struct ceph_mon_poolop {
169 struct ceph_mon_request_header monhdr;
170 struct ceph_fsid fsid;
176 } __attribute__ ((packed));
178 struct ceph_mon_poolop_reply {
179 struct ceph_mon_request_header monhdr;
180 struct ceph_fsid fsid;
185 } __attribute__ ((packed));
187 struct ceph_mon_unmanaged_snap {
189 } __attribute__ ((packed));
191 struct ceph_osd_getmap {
192 struct ceph_mon_request_header monhdr;
193 struct ceph_fsid fsid;
195 } __attribute__ ((packed));
197 struct ceph_mds_getmap {
198 struct ceph_mon_request_header monhdr;
199 struct ceph_fsid fsid;
200 } __attribute__ ((packed));
202 struct ceph_client_mount {
203 struct ceph_mon_request_header monhdr;
204 } __attribute__ ((packed));
206 struct ceph_mon_subscribe_item {
207 __le64 have_version; __le64 have;
209 } __attribute__ ((packed));
211 struct ceph_mon_subscribe_ack {
212 __le32 duration; /* seconds */
213 struct ceph_fsid fsid;
214 } __attribute__ ((packed));
221 #define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
222 #define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
224 #define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
225 #define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
226 #define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
227 #define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
228 #define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
230 #define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
231 #define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
232 operations (import, rename, etc.) */
233 #define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
234 #define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
235 #define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
236 #define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
237 #define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
239 extern const char *ceph_mds_state_name(int s);
243 * metadata lock types.
244 * - these are bitmasks.. we can compose them
245 * - they also define the lock ordering by the MDS
246 * - a few of these are internal to the mds
248 #define CEPH_LOCK_DVERSION 1
249 #define CEPH_LOCK_DN 2
250 #define CEPH_LOCK_ISNAP 16
251 #define CEPH_LOCK_IVERSION 32 /* mds internal */
252 #define CEPH_LOCK_IFILE 64
253 #define CEPH_LOCK_IAUTH 128
254 #define CEPH_LOCK_ILINK 256
255 #define CEPH_LOCK_IDFT 512 /* dir frag tree */
256 #define CEPH_LOCK_INEST 1024 /* mds internal */
257 #define CEPH_LOCK_IXATTR 2048
258 #define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
259 #define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
261 /* client_session ops */
263 CEPH_SESSION_REQUEST_OPEN,
265 CEPH_SESSION_REQUEST_CLOSE,
267 CEPH_SESSION_REQUEST_RENEWCAPS,
268 CEPH_SESSION_RENEWCAPS,
270 CEPH_SESSION_RECALL_STATE,
273 extern const char *ceph_session_op_name(int op);
275 struct ceph_mds_session_head {
278 struct ceph_timespec stamp;
279 __le32 max_caps, max_leases;
280 } __attribute__ ((packed));
285 * & 0x001000 -> write op
286 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
287 & & 0x100000 -> use weird ino/path trace
289 #define CEPH_MDS_OP_WRITE 0x001000
291 CEPH_MDS_OP_LOOKUP = 0x00100,
292 CEPH_MDS_OP_GETATTR = 0x00101,
293 CEPH_MDS_OP_LOOKUPHASH = 0x00102,
294 CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
296 CEPH_MDS_OP_SETXATTR = 0x01105,
297 CEPH_MDS_OP_RMXATTR = 0x01106,
298 CEPH_MDS_OP_SETLAYOUT = 0x01107,
299 CEPH_MDS_OP_SETATTR = 0x01108,
301 CEPH_MDS_OP_MKNOD = 0x01201,
302 CEPH_MDS_OP_LINK = 0x01202,
303 CEPH_MDS_OP_UNLINK = 0x01203,
304 CEPH_MDS_OP_RENAME = 0x01204,
305 CEPH_MDS_OP_MKDIR = 0x01220,
306 CEPH_MDS_OP_RMDIR = 0x01221,
307 CEPH_MDS_OP_SYMLINK = 0x01222,
309 CEPH_MDS_OP_CREATE = 0x01301,
310 CEPH_MDS_OP_OPEN = 0x00302,
311 CEPH_MDS_OP_READDIR = 0x00305,
313 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
314 CEPH_MDS_OP_MKSNAP = 0x01400,
315 CEPH_MDS_OP_RMSNAP = 0x01401,
316 CEPH_MDS_OP_LSSNAP = 0x00402,
319 extern const char *ceph_mds_op_name(int op);
322 #define CEPH_SETATTR_MODE 1
323 #define CEPH_SETATTR_UID 2
324 #define CEPH_SETATTR_GID 4
325 #define CEPH_SETATTR_MTIME 8
326 #define CEPH_SETATTR_ATIME 16
327 #define CEPH_SETATTR_SIZE 32
328 #define CEPH_SETATTR_CTIME 64
330 union ceph_mds_request_args {
332 __le32 mask; /* CEPH_CAP_* */
333 } __attribute__ ((packed)) getattr;
338 struct ceph_timespec mtime;
339 struct ceph_timespec atime;
340 __le64 size, old_size; /* old_size needed by truncate */
341 __le32 mask; /* CEPH_SETATTR_* */
342 } __attribute__ ((packed)) setattr;
344 __le32 frag; /* which dir fragment */
345 __le32 max_entries; /* how many dentries to grab */
347 } __attribute__ ((packed)) readdir;
351 } __attribute__ ((packed)) mknod;
354 } __attribute__ ((packed)) mkdir;
358 __le32 stripe_unit; /* layout for newly created file */
359 __le32 stripe_count; /* ... */
361 __le32 file_replication;
363 } __attribute__ ((packed)) open;
366 } __attribute__ ((packed)) setxattr;
368 struct ceph_file_layout layout;
369 } __attribute__ ((packed)) setlayout;
370 } __attribute__ ((packed));
372 #define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
373 #define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
375 struct ceph_mds_request_head {
376 __le64 oldest_client_tid;
377 __le32 mdsmap_epoch; /* on client */
378 __le32 flags; /* CEPH_MDS_FLAG_* */
379 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
380 __le16 num_releases; /* # include cap/lease release records */
381 __le32 op; /* mds op code */
382 __le32 caller_uid, caller_gid;
383 __le64 ino; /* use this ino for openc, mkdir, mknod,
384 etc. (if replaying) */
385 union ceph_mds_request_args args;
386 } __attribute__ ((packed));
388 /* cap/lease release record */
389 struct ceph_mds_request_release {
390 __le64 ino, cap_id; /* ino and unique cap id */
391 __le32 caps, wanted; /* new issued, wanted */
392 __le32 seq, issue_seq, mseq;
393 __le32 dname_seq; /* if releasing a dentry lease, a */
394 __le32 dname_len; /* string follows. */
395 } __attribute__ ((packed));
398 struct ceph_mds_reply_head {
402 __u8 safe; /* true if committed to disk */
403 __u8 is_dentry, is_target; /* true if dentry, target inode records
404 are included with reply */
405 } __attribute__ ((packed));
407 /* one for each node split */
408 struct ceph_frag_tree_split {
409 __le32 frag; /* this frag splits... */
410 __le32 by; /* ...by this many bits */
411 } __attribute__ ((packed));
413 struct ceph_frag_tree_head {
414 __le32 nsplits; /* num ceph_frag_tree_split records */
415 struct ceph_frag_tree_split splits[];
416 } __attribute__ ((packed));
418 /* capability issue, for bundling with mds reply */
419 struct ceph_mds_reply_cap {
420 __le32 caps, wanted; /* caps issued, wanted */
423 __le64 realm; /* snap realm */
424 __u8 flags; /* CEPH_CAP_FLAG_* */
425 } __attribute__ ((packed));
427 #define CEPH_CAP_FLAG_AUTH 1 /* cap is issued by auth mds */
429 /* inode record, for bundling with mds reply */
430 struct ceph_mds_reply_inode {
434 __le64 version; /* inode version */
435 __le64 xattr_version; /* version for xattr blob */
436 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
437 struct ceph_file_layout layout;
438 struct ceph_timespec ctime, mtime, atime;
439 __le32 time_warp_seq;
440 __le64 size, max_size, truncate_size;
442 __le32 mode, uid, gid;
444 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
445 struct ceph_timespec rctime;
446 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
447 } __attribute__ ((packed));
448 /* followed by frag array, then symlink string, then xattr blob */
450 /* reply_lease follows dname, and reply_inode */
451 struct ceph_mds_reply_lease {
452 __le16 mask; /* lease type(s) */
453 __le32 duration_ms; /* lease duration */
455 } __attribute__ ((packed));
457 struct ceph_mds_reply_dirfrag {
458 __le32 frag; /* fragment */
459 __le32 auth; /* auth mds, if this is a delegation point */
460 __le32 ndist; /* number of mds' this is replicated on */
462 } __attribute__ ((packed));
464 /* file access modes */
465 #define CEPH_FILE_MODE_PIN 0
466 #define CEPH_FILE_MODE_RD 1
467 #define CEPH_FILE_MODE_WR 2
468 #define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
469 #define CEPH_FILE_MODE_LAZY 4 /* lazy io */
470 #define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
472 int ceph_flags_to_mode(int flags);
475 /* capability bits */
476 #define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
478 /* generic cap bits */
479 #define CEPH_CAP_GSHARED 1 /* client can reads */
480 #define CEPH_CAP_GEXCL 2 /* client can read and update */
481 #define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
482 #define CEPH_CAP_GRD 8 /* (file) client can read */
483 #define CEPH_CAP_GWR 16 /* (file) client can write */
484 #define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
485 #define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
486 #define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
489 #define CEPH_CAP_SAUTH 2
490 #define CEPH_CAP_SLINK 4
491 #define CEPH_CAP_SXATTR 6
492 #define CEPH_CAP_SFILE 8 /* goes at the end (uses >2 cap bits) */
494 #define CEPH_CAP_BITS 16
496 /* composed values */
497 #define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
498 #define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
499 #define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
500 #define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
501 #define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
502 #define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
503 #define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
504 #define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
505 #define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
506 #define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
507 #define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
508 #define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
509 #define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
510 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
511 #define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
513 /* cap masks (for getattr) */
514 #define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
515 #define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
516 #define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
517 #define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
518 #define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
519 #define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
520 #define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
521 #define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
522 #define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
523 #define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
524 #define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
525 #define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
526 #define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
527 CEPH_CAP_AUTH_SHARED | \
528 CEPH_CAP_LINK_SHARED | \
529 CEPH_CAP_FILE_SHARED | \
530 CEPH_CAP_XATTR_SHARED)
532 #define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
533 CEPH_CAP_LINK_SHARED | \
534 CEPH_CAP_XATTR_SHARED | \
535 CEPH_CAP_FILE_SHARED)
536 #define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
539 #define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
540 CEPH_CAP_LINK_EXCL | \
541 CEPH_CAP_XATTR_EXCL | \
543 #define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
545 #define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
546 #define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
547 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
550 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
553 int ceph_caps_for_mode(int mode);
556 CEPH_CAP_OP_GRANT, /* mds->client grant */
557 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
558 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
559 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
560 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
561 CEPH_CAP_OP_UPDATE, /* client->mds update */
562 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
563 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
564 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
565 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
566 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
567 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
568 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
571 extern const char *ceph_cap_op_name(int op);
574 * caps message, used for capability callbacks, acks, requests, etc.
576 struct ceph_mds_caps {
577 __le32 op; /* CEPH_CAP_OP_* */
580 __le32 seq, issue_seq;
581 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
584 __le32 snap_trace_len;
587 __le32 uid, gid, mode;
594 __le64 xattr_version;
597 __le64 size, max_size, truncate_size;
599 struct ceph_timespec mtime, atime, ctime;
600 struct ceph_file_layout layout;
601 __le32 time_warp_seq;
602 } __attribute__ ((packed));
604 /* cap release msg head */
605 struct ceph_mds_cap_release {
606 __le32 num; /* number of cap_items that follow */
607 } __attribute__ ((packed));
609 struct ceph_mds_cap_item {
612 __le32 migrate_seq, seq;
613 } __attribute__ ((packed));
615 #define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
616 #define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
617 #define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
618 #define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
620 extern const char *ceph_lease_op_name(int o);
622 /* lease msg header */
623 struct ceph_mds_lease {
624 __u8 action; /* CEPH_MDS_LEASE_* */
625 __le16 mask; /* which lease */
627 __le64 first, last; /* snap range */
629 __le32 duration_ms; /* duration of renewal */
630 } __attribute__ ((packed));
631 /* followed by a __le32+string for dname */
633 /* client reconnect */
634 struct ceph_mds_cap_reconnect {
639 __le64 pathbase; /* base ino for our path to this ino */
640 __le32 flock_len; /* size of flock state blob, if any */
641 } __attribute__ ((packed));
642 /* followed by flock blob */
644 struct ceph_mds_cap_reconnect_v1 {
649 struct ceph_timespec mtime, atime;
651 __le64 pathbase; /* base ino for our path to this ino */
652 } __attribute__ ((packed));
654 struct ceph_mds_snaprealm_reconnect {
655 __le64 ino; /* snap realm base */
656 __le64 seq; /* snap seq for this snap realm */
657 __le64 parent; /* parent realm */
658 } __attribute__ ((packed));
664 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
666 CEPH_SNAP_OP_DESTROY,
670 extern const char *ceph_snap_op_name(int o);
672 /* snap msg header */
673 struct ceph_mds_snap_head {
674 __le32 op; /* CEPH_SNAP_OP_* */
675 __le64 split; /* ino to split off, if any */
676 __le32 num_split_inos; /* # inos belonging to new child realm */
677 __le32 num_split_realms; /* # child realms udner new child realm */
678 __le32 trace_len; /* size of snap trace blob */
679 } __attribute__ ((packed));
680 /* followed by split ino list, then split realms, then the trace blob */
683 * encode info about a snaprealm, as viewed by a client
685 struct ceph_mds_snap_realm {
686 __le64 ino; /* ino */
687 __le64 created; /* snap: when created */
688 __le64 parent; /* ino: parent realm */
689 __le64 parent_since; /* snap: same parent since */
690 __le64 seq; /* snap: version */
692 __le32 num_prior_parent_snaps;
693 } __attribute__ ((packed));
694 /* followed by my snap list, then prior parent snap list */