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Linux kernel mirror (for testing)
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1/*
2 * ceph_fs.h - Ceph constants and data types to share between kernel and
3 * user space.
4 *
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.
8 *
9 * LGPL2
10 */
11
12#ifndef _FS_CEPH_CEPH_FS_H
13#define _FS_CEPH_CEPH_FS_H
14
15#include "msgr.h"
16#include "rados.h"
17
18/*
19 * Ceph release version
20 */
21#define CEPH_VERSION_MAJOR 0
22#define CEPH_VERSION_MINOR 20
23#define CEPH_VERSION_PATCH 0
24
25#define _CEPH_STRINGIFY(x) #x
26#define CEPH_STRINGIFY(x) _CEPH_STRINGIFY(x)
27#define CEPH_MAKE_VERSION(x, y, z) CEPH_STRINGIFY(x) "." CEPH_STRINGIFY(y) \
28 "." CEPH_STRINGIFY(z)
29#define CEPH_VERSION CEPH_MAKE_VERSION(CEPH_VERSION_MAJOR, \
30 CEPH_VERSION_MINOR, CEPH_VERSION_PATCH)
31
32/*
33 * subprotocol versions. when specific messages types or high-level
34 * protocols change, bump the affected components. we keep rev
35 * internal cluster protocols separately from the public,
36 * client-facing protocol.
37 */
38#define CEPH_OSD_PROTOCOL 8 /* cluster internal */
39#define CEPH_MDS_PROTOCOL 12 /* cluster internal */
40#define CEPH_MON_PROTOCOL 5 /* cluster internal */
41#define CEPH_OSDC_PROTOCOL 24 /* server/client */
42#define CEPH_MDSC_PROTOCOL 32 /* server/client */
43#define CEPH_MONC_PROTOCOL 15 /* server/client */
44
45
46#define CEPH_INO_ROOT 1
47#define CEPH_INO_CEPH 2 /* hidden .ceph dir */
48
49/* arbitrary limit on max # of monitors (cluster of 3 is typical) */
50#define CEPH_MAX_MON 31
51
52
53/*
54 * feature bits
55 */
56#define CEPH_FEATURE_UID 1
57#define CEPH_FEATURE_NOSRCADDR 2
58#define CEPH_FEATURE_FLOCK 4
59
60#define CEPH_FEATURE_SUPPORTED_MON CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR
61#define CEPH_FEATURE_REQUIRED_MON CEPH_FEATURE_UID
62#define CEPH_FEATURE_SUPPORTED_MDS CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR|CEPH_FEATURE_FLOCK
63#define CEPH_FEATURE_REQUIRED_MDS CEPH_FEATURE_UID
64#define CEPH_FEATURE_SUPPORTED_OSD CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR
65#define CEPH_FEATURE_REQUIRED_OSD CEPH_FEATURE_UID
66#define CEPH_FEATURE_SUPPORTED_CLIENT CEPH_FEATURE_NOSRCADDR
67#define CEPH_FEATURE_REQUIRED_CLIENT CEPH_FEATURE_NOSRCADDR
68
69
70/*
71 * ceph_file_layout - describe data layout for a file/inode
72 */
73struct ceph_file_layout {
74 /* file -> object mapping */
75 __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
76 of page size. */
77 __le32 fl_stripe_count; /* over this many objects */
78 __le32 fl_object_size; /* until objects are this big, then move to
79 new objects */
80 __le32 fl_cas_hash; /* 0 = none; 1 = sha256 */
81
82 /* pg -> disk layout */
83 __le32 fl_object_stripe_unit; /* for per-object parity, if any */
84
85 /* object -> pg layout */
86 __le32 fl_pg_preferred; /* preferred primary for pg (-1 for none) */
87 __le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
88} __attribute__ ((packed));
89
90#define CEPH_MIN_STRIPE_UNIT 65536
91
92int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
93
94
95/* crypto algorithms */
96#define CEPH_CRYPTO_NONE 0x0
97#define CEPH_CRYPTO_AES 0x1
98
99/* security/authentication protocols */
100#define CEPH_AUTH_UNKNOWN 0x0
101#define CEPH_AUTH_NONE 0x1
102#define CEPH_AUTH_CEPHX 0x2
103
104#define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
105
106
107/*********************************************
108 * message layer
109 */
110
111/*
112 * message types
113 */
114
115/* misc */
116#define CEPH_MSG_SHUTDOWN 1
117#define CEPH_MSG_PING 2
118
119/* client <-> monitor */
120#define CEPH_MSG_MON_MAP 4
121#define CEPH_MSG_MON_GET_MAP 5
122#define CEPH_MSG_STATFS 13
123#define CEPH_MSG_STATFS_REPLY 14
124#define CEPH_MSG_MON_SUBSCRIBE 15
125#define CEPH_MSG_MON_SUBSCRIBE_ACK 16
126#define CEPH_MSG_AUTH 17
127#define CEPH_MSG_AUTH_REPLY 18
128
129/* client <-> mds */
130#define CEPH_MSG_MDS_MAP 21
131
132#define CEPH_MSG_CLIENT_SESSION 22
133#define CEPH_MSG_CLIENT_RECONNECT 23
134
135#define CEPH_MSG_CLIENT_REQUEST 24
136#define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
137#define CEPH_MSG_CLIENT_REPLY 26
138#define CEPH_MSG_CLIENT_CAPS 0x310
139#define CEPH_MSG_CLIENT_LEASE 0x311
140#define CEPH_MSG_CLIENT_SNAP 0x312
141#define CEPH_MSG_CLIENT_CAPRELEASE 0x313
142
143/* pool ops */
144#define CEPH_MSG_POOLOP_REPLY 48
145#define CEPH_MSG_POOLOP 49
146
147
148/* osd */
149#define CEPH_MSG_OSD_MAP 41
150#define CEPH_MSG_OSD_OP 42
151#define CEPH_MSG_OSD_OPREPLY 43
152
153/* pool operations */
154enum {
155 POOL_OP_CREATE = 0x01,
156 POOL_OP_DELETE = 0x02,
157 POOL_OP_AUID_CHANGE = 0x03,
158 POOL_OP_CREATE_SNAP = 0x11,
159 POOL_OP_DELETE_SNAP = 0x12,
160 POOL_OP_CREATE_UNMANAGED_SNAP = 0x21,
161 POOL_OP_DELETE_UNMANAGED_SNAP = 0x22,
162};
163
164struct ceph_mon_request_header {
165 __le64 have_version;
166 __le16 session_mon;
167 __le64 session_mon_tid;
168} __attribute__ ((packed));
169
170struct ceph_mon_statfs {
171 struct ceph_mon_request_header monhdr;
172 struct ceph_fsid fsid;
173} __attribute__ ((packed));
174
175struct ceph_statfs {
176 __le64 kb, kb_used, kb_avail;
177 __le64 num_objects;
178} __attribute__ ((packed));
179
180struct ceph_mon_statfs_reply {
181 struct ceph_fsid fsid;
182 __le64 version;
183 struct ceph_statfs st;
184} __attribute__ ((packed));
185
186const char *ceph_pool_op_name(int op);
187
188struct ceph_mon_poolop {
189 struct ceph_mon_request_header monhdr;
190 struct ceph_fsid fsid;
191 __le32 pool;
192 __le32 op;
193 __le64 auid;
194 __le64 snapid;
195 __le32 name_len;
196} __attribute__ ((packed));
197
198struct ceph_mon_poolop_reply {
199 struct ceph_mon_request_header monhdr;
200 struct ceph_fsid fsid;
201 __le32 reply_code;
202 __le32 epoch;
203 char has_data;
204 char data[0];
205} __attribute__ ((packed));
206
207struct ceph_mon_unmanaged_snap {
208 __le64 snapid;
209} __attribute__ ((packed));
210
211struct ceph_osd_getmap {
212 struct ceph_mon_request_header monhdr;
213 struct ceph_fsid fsid;
214 __le32 start;
215} __attribute__ ((packed));
216
217struct ceph_mds_getmap {
218 struct ceph_mon_request_header monhdr;
219 struct ceph_fsid fsid;
220} __attribute__ ((packed));
221
222struct ceph_client_mount {
223 struct ceph_mon_request_header monhdr;
224} __attribute__ ((packed));
225
226struct ceph_mon_subscribe_item {
227 __le64 have_version; __le64 have;
228 __u8 onetime;
229} __attribute__ ((packed));
230
231struct ceph_mon_subscribe_ack {
232 __le32 duration; /* seconds */
233 struct ceph_fsid fsid;
234} __attribute__ ((packed));
235
236/*
237 * mds states
238 * > 0 -> in
239 * <= 0 -> out
240 */
241#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
242#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
243 empty log. */
244#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
245#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
246#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
247#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
248#define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
249
250#define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
251#define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
252 operations (import, rename, etc.) */
253#define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
254#define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
255#define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
256#define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
257#define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
258
259extern const char *ceph_mds_state_name(int s);
260
261
262/*
263 * metadata lock types.
264 * - these are bitmasks.. we can compose them
265 * - they also define the lock ordering by the MDS
266 * - a few of these are internal to the mds
267 */
268#define CEPH_LOCK_DVERSION 1
269#define CEPH_LOCK_DN 2
270#define CEPH_LOCK_ISNAP 16
271#define CEPH_LOCK_IVERSION 32 /* mds internal */
272#define CEPH_LOCK_IFILE 64
273#define CEPH_LOCK_IAUTH 128
274#define CEPH_LOCK_ILINK 256
275#define CEPH_LOCK_IDFT 512 /* dir frag tree */
276#define CEPH_LOCK_INEST 1024 /* mds internal */
277#define CEPH_LOCK_IXATTR 2048
278#define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
279
280/* client_session ops */
281enum {
282 CEPH_SESSION_REQUEST_OPEN,
283 CEPH_SESSION_OPEN,
284 CEPH_SESSION_REQUEST_CLOSE,
285 CEPH_SESSION_CLOSE,
286 CEPH_SESSION_REQUEST_RENEWCAPS,
287 CEPH_SESSION_RENEWCAPS,
288 CEPH_SESSION_STALE,
289 CEPH_SESSION_RECALL_STATE,
290};
291
292extern const char *ceph_session_op_name(int op);
293
294struct 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
309enum {
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
315 CEPH_MDS_OP_SETXATTR = 0x01105,
316 CEPH_MDS_OP_RMXATTR = 0x01106,
317 CEPH_MDS_OP_SETLAYOUT = 0x01107,
318 CEPH_MDS_OP_SETATTR = 0x01108,
319
320 CEPH_MDS_OP_MKNOD = 0x01201,
321 CEPH_MDS_OP_LINK = 0x01202,
322 CEPH_MDS_OP_UNLINK = 0x01203,
323 CEPH_MDS_OP_RENAME = 0x01204,
324 CEPH_MDS_OP_MKDIR = 0x01220,
325 CEPH_MDS_OP_RMDIR = 0x01221,
326 CEPH_MDS_OP_SYMLINK = 0x01222,
327
328 CEPH_MDS_OP_CREATE = 0x01301,
329 CEPH_MDS_OP_OPEN = 0x00302,
330 CEPH_MDS_OP_READDIR = 0x00305,
331
332 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
333 CEPH_MDS_OP_MKSNAP = 0x01400,
334 CEPH_MDS_OP_RMSNAP = 0x01401,
335 CEPH_MDS_OP_LSSNAP = 0x00402,
336};
337
338extern const char *ceph_mds_op_name(int op);
339
340
341#define CEPH_SETATTR_MODE 1
342#define CEPH_SETATTR_UID 2
343#define CEPH_SETATTR_GID 4
344#define CEPH_SETATTR_MTIME 8
345#define CEPH_SETATTR_ATIME 16
346#define CEPH_SETATTR_SIZE 32
347#define CEPH_SETATTR_CTIME 64
348
349union ceph_mds_request_args {
350 struct {
351 __le32 mask; /* CEPH_CAP_* */
352 } __attribute__ ((packed)) getattr;
353 struct {
354 __le32 mode;
355 __le32 uid;
356 __le32 gid;
357 struct ceph_timespec mtime;
358 struct ceph_timespec atime;
359 __le64 size, old_size; /* old_size needed by truncate */
360 __le32 mask; /* CEPH_SETATTR_* */
361 } __attribute__ ((packed)) setattr;
362 struct {
363 __le32 frag; /* which dir fragment */
364 __le32 max_entries; /* how many dentries to grab */
365 __le32 max_bytes;
366 } __attribute__ ((packed)) readdir;
367 struct {
368 __le32 mode;
369 __le32 rdev;
370 } __attribute__ ((packed)) mknod;
371 struct {
372 __le32 mode;
373 } __attribute__ ((packed)) mkdir;
374 struct {
375 __le32 flags;
376 __le32 mode;
377 __le32 stripe_unit; /* layout for newly created file */
378 __le32 stripe_count; /* ... */
379 __le32 object_size;
380 __le32 file_replication;
381 __le32 preferred;
382 } __attribute__ ((packed)) open;
383 struct {
384 __le32 flags;
385 } __attribute__ ((packed)) setxattr;
386 struct {
387 struct ceph_file_layout layout;
388 } __attribute__ ((packed)) setlayout;
389} __attribute__ ((packed));
390
391#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
392#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
393
394struct ceph_mds_request_head {
395 __le64 oldest_client_tid;
396 __le32 mdsmap_epoch; /* on client */
397 __le32 flags; /* CEPH_MDS_FLAG_* */
398 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
399 __le16 num_releases; /* # include cap/lease release records */
400 __le32 op; /* mds op code */
401 __le32 caller_uid, caller_gid;
402 __le64 ino; /* use this ino for openc, mkdir, mknod,
403 etc. (if replaying) */
404 union ceph_mds_request_args args;
405} __attribute__ ((packed));
406
407/* cap/lease release record */
408struct ceph_mds_request_release {
409 __le64 ino, cap_id; /* ino and unique cap id */
410 __le32 caps, wanted; /* new issued, wanted */
411 __le32 seq, issue_seq, mseq;
412 __le32 dname_seq; /* if releasing a dentry lease, a */
413 __le32 dname_len; /* string follows. */
414} __attribute__ ((packed));
415
416/* client reply */
417struct ceph_mds_reply_head {
418 __le32 op;
419 __le32 result;
420 __le32 mdsmap_epoch;
421 __u8 safe; /* true if committed to disk */
422 __u8 is_dentry, is_target; /* true if dentry, target inode records
423 are included with reply */
424} __attribute__ ((packed));
425
426/* one for each node split */
427struct ceph_frag_tree_split {
428 __le32 frag; /* this frag splits... */
429 __le32 by; /* ...by this many bits */
430} __attribute__ ((packed));
431
432struct ceph_frag_tree_head {
433 __le32 nsplits; /* num ceph_frag_tree_split records */
434 struct ceph_frag_tree_split splits[];
435} __attribute__ ((packed));
436
437/* capability issue, for bundling with mds reply */
438struct ceph_mds_reply_cap {
439 __le32 caps, wanted; /* caps issued, wanted */
440 __le64 cap_id;
441 __le32 seq, mseq;
442 __le64 realm; /* snap realm */
443 __u8 flags; /* CEPH_CAP_FLAG_* */
444} __attribute__ ((packed));
445
446#define CEPH_CAP_FLAG_AUTH 1 /* cap is issued by auth mds */
447
448/* inode record, for bundling with mds reply */
449struct ceph_mds_reply_inode {
450 __le64 ino;
451 __le64 snapid;
452 __le32 rdev;
453 __le64 version; /* inode version */
454 __le64 xattr_version; /* version for xattr blob */
455 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
456 struct ceph_file_layout layout;
457 struct ceph_timespec ctime, mtime, atime;
458 __le32 time_warp_seq;
459 __le64 size, max_size, truncate_size;
460 __le32 truncate_seq;
461 __le32 mode, uid, gid;
462 __le32 nlink;
463 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
464 struct ceph_timespec rctime;
465 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
466} __attribute__ ((packed));
467/* followed by frag array, then symlink string, then xattr blob */
468
469/* reply_lease follows dname, and reply_inode */
470struct ceph_mds_reply_lease {
471 __le16 mask; /* lease type(s) */
472 __le32 duration_ms; /* lease duration */
473 __le32 seq;
474} __attribute__ ((packed));
475
476struct ceph_mds_reply_dirfrag {
477 __le32 frag; /* fragment */
478 __le32 auth; /* auth mds, if this is a delegation point */
479 __le32 ndist; /* number of mds' this is replicated on */
480 __le32 dist[];
481} __attribute__ ((packed));
482
483/* file access modes */
484#define CEPH_FILE_MODE_PIN 0
485#define CEPH_FILE_MODE_RD 1
486#define CEPH_FILE_MODE_WR 2
487#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
488#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
489#define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
490
491int ceph_flags_to_mode(int flags);
492
493
494/* capability bits */
495#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
496
497/* generic cap bits */
498#define CEPH_CAP_GSHARED 1 /* client can reads */
499#define CEPH_CAP_GEXCL 2 /* client can read and update */
500#define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
501#define CEPH_CAP_GRD 8 /* (file) client can read */
502#define CEPH_CAP_GWR 16 /* (file) client can write */
503#define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
504#define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
505#define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
506
507/* per-lock shift */
508#define CEPH_CAP_SAUTH 2
509#define CEPH_CAP_SLINK 4
510#define CEPH_CAP_SXATTR 6
511#define CEPH_CAP_SFILE 8 /* goes at the end (uses >2 cap bits) */
512
513#define CEPH_CAP_BITS 16
514
515/* composed values */
516#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
517#define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
518#define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
519#define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
520#define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
521#define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
522#define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
523#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
524#define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
525#define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
526#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
527#define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
528#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
529#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
530#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
531
532/* cap masks (for getattr) */
533#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
534#define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
535#define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
536#define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
537#define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
538#define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
539#define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
540#define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
541#define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
542#define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
543#define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
544#define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
545#define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
546 CEPH_CAP_AUTH_SHARED | \
547 CEPH_CAP_LINK_SHARED | \
548 CEPH_CAP_FILE_SHARED | \
549 CEPH_CAP_XATTR_SHARED)
550
551#define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
552 CEPH_CAP_LINK_SHARED | \
553 CEPH_CAP_XATTR_SHARED | \
554 CEPH_CAP_FILE_SHARED)
555#define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
556 CEPH_CAP_FILE_CACHE)
557
558#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
559 CEPH_CAP_LINK_EXCL | \
560 CEPH_CAP_XATTR_EXCL | \
561 CEPH_CAP_FILE_EXCL)
562#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
563 CEPH_CAP_FILE_EXCL)
564#define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
565#define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
566 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_PIN)
567
568#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
569 CEPH_LOCK_IXATTR)
570
571int ceph_caps_for_mode(int mode);
572
573enum {
574 CEPH_CAP_OP_GRANT, /* mds->client grant */
575 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
576 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
577 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
578 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
579 CEPH_CAP_OP_UPDATE, /* client->mds update */
580 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
581 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
582 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
583 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
584 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
585 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
586 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
587};
588
589extern const char *ceph_cap_op_name(int op);
590
591/*
592 * caps message, used for capability callbacks, acks, requests, etc.
593 */
594struct ceph_mds_caps {
595 __le32 op; /* CEPH_CAP_OP_* */
596 __le64 ino, realm;
597 __le64 cap_id;
598 __le32 seq, issue_seq;
599 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
600 __le32 migrate_seq;
601 __le64 snap_follows;
602 __le32 snap_trace_len;
603
604 /* authlock */
605 __le32 uid, gid, mode;
606
607 /* linklock */
608 __le32 nlink;
609
610 /* xattrlock */
611 __le32 xattr_len;
612 __le64 xattr_version;
613
614 /* filelock */
615 __le64 size, max_size, truncate_size;
616 __le32 truncate_seq;
617 struct ceph_timespec mtime, atime, ctime;
618 struct ceph_file_layout layout;
619 __le32 time_warp_seq;
620} __attribute__ ((packed));
621
622/* cap release msg head */
623struct ceph_mds_cap_release {
624 __le32 num; /* number of cap_items that follow */
625} __attribute__ ((packed));
626
627struct ceph_mds_cap_item {
628 __le64 ino;
629 __le64 cap_id;
630 __le32 migrate_seq, seq;
631} __attribute__ ((packed));
632
633#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
634#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
635#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
636#define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
637
638extern const char *ceph_lease_op_name(int o);
639
640/* lease msg header */
641struct ceph_mds_lease {
642 __u8 action; /* CEPH_MDS_LEASE_* */
643 __le16 mask; /* which lease */
644 __le64 ino;
645 __le64 first, last; /* snap range */
646 __le32 seq;
647 __le32 duration_ms; /* duration of renewal */
648} __attribute__ ((packed));
649/* followed by a __le32+string for dname */
650
651/* client reconnect */
652struct ceph_mds_cap_reconnect {
653 __le64 cap_id;
654 __le32 wanted;
655 __le32 issued;
656 __le64 size;
657 struct ceph_timespec mtime, atime;
658 __le64 snaprealm;
659 __le64 pathbase; /* base ino for our path to this ino */
660} __attribute__ ((packed));
661/* followed by encoded string */
662
663struct ceph_mds_snaprealm_reconnect {
664 __le64 ino; /* snap realm base */
665 __le64 seq; /* snap seq for this snap realm */
666 __le64 parent; /* parent realm */
667} __attribute__ ((packed));
668
669/*
670 * snaps
671 */
672enum {
673 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
674 CEPH_SNAP_OP_CREATE,
675 CEPH_SNAP_OP_DESTROY,
676 CEPH_SNAP_OP_SPLIT,
677};
678
679extern const char *ceph_snap_op_name(int o);
680
681/* snap msg header */
682struct ceph_mds_snap_head {
683 __le32 op; /* CEPH_SNAP_OP_* */
684 __le64 split; /* ino to split off, if any */
685 __le32 num_split_inos; /* # inos belonging to new child realm */
686 __le32 num_split_realms; /* # child realms udner new child realm */
687 __le32 trace_len; /* size of snap trace blob */
688} __attribute__ ((packed));
689/* followed by split ino list, then split realms, then the trace blob */
690
691/*
692 * encode info about a snaprealm, as viewed by a client
693 */
694struct ceph_mds_snap_realm {
695 __le64 ino; /* ino */
696 __le64 created; /* snap: when created */
697 __le64 parent; /* ino: parent realm */
698 __le64 parent_since; /* snap: same parent since */
699 __le64 seq; /* snap: version */
700 __le32 num_snaps;
701 __le32 num_prior_parent_snaps;
702} __attribute__ ((packed));
703/* followed by my snap list, then prior parent snap list */
704
705#endif