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ceph: support v2 client_caps encoding
[mirror_ubuntu-bionic-kernel.git] / fs / ceph / ceph_fs.h
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0dee3c28
SW		 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
5cd068c2
SW		 12#ifndef CEPH_FS_H
13#define CEPH_FS_H
0dee3c28
SW		 14
15#include "msgr.h"
16#include "rados.h"
17
0dee3c28
SW		 18/*
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.
23 */
6df058c0 24#define CEPH_OSD_PROTOCOL 8 /* cluster internal */
ca9d93a2 25#define CEPH_MDS_PROTOCOL 12 /* cluster internal */
13e38c8a 26#define CEPH_MON_PROTOCOL 5 /* cluster internal */
0c948992 27#define CEPH_OSDC_PROTOCOL 24 /* server/client */
3ea25f94 28#define CEPH_MDSC_PROTOCOL 32 /* server/client */
13e38c8a 29#define CEPH_MONC_PROTOCOL 15 /* server/client */
0dee3c28
SW		 30
31
32#define CEPH_INO_ROOT 1
1d1de916 33#define CEPH_INO_CEPH 2 /* hidden .ceph dir */
0dee3c28
SW		 34
35/* arbitrary limit on max # of monitors (cluster of 3 is typical) */
36#define CEPH_MAX_MON 31
37
38
04a419f9
SW		 39/*
40 * feature bits
41 */
9688f19a
SW		 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)
04a419f9 46
0dee3c28
SW		 47
48/*
49 * ceph_file_layout - describe data layout for a file/inode
50 */
51struct ceph_file_layout {
52 /* file -> object mapping */
53 __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
54 of page size. */
55 __le32 fl_stripe_count; /* over this many objects */
56 __le32 fl_object_size; /* until objects are this big, then move to
57 new objects */
58 __le32 fl_cas_hash; /* 0 = none; 1 = sha256 */
59
60 /* pg -> disk layout */
61 __le32 fl_object_stripe_unit; /* for per-object parity, if any */
62
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));
67
752727a1 68#define CEPH_MIN_STRIPE_UNIT 65536
0dee3c28 69
752727a1 70int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
0dee3c28
SW		 71
72
4e7a5dcd
SW		 73/* crypto algorithms */
74#define CEPH_CRYPTO_NONE 0x0
75#define CEPH_CRYPTO_AES 0x1
76
cbbfe499
SW		 77#define CEPH_AES_IV "cephsageyudagreg"
78
4e7a5dcd
SW		 79/* security/authentication protocols */
80#define CEPH_AUTH_UNKNOWN 0x0
81#define CEPH_AUTH_NONE 0x1
82#define CEPH_AUTH_CEPHX 0x2
83
ca9d93a2
SW		 84#define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
85
4e7a5dcd 86
0dee3c28
SW		 87/*********************************************
88 * message layer
89 */
90
91/*
92 * message types
93 */
94
95/* misc */
96#define CEPH_MSG_SHUTDOWN 1
97#define CEPH_MSG_PING 2
98
99/* client <-> monitor */
100#define CEPH_MSG_MON_MAP 4
101#define CEPH_MSG_MON_GET_MAP 5
0dee3c28
SW		 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
4e7a5dcd
SW		 106#define CEPH_MSG_AUTH 17
107#define CEPH_MSG_AUTH_REPLY 18
0dee3c28
SW		 108
109/* client <-> mds */
0dee3c28
SW		 110#define CEPH_MSG_MDS_MAP 21
111
112#define CEPH_MSG_CLIENT_SESSION 22
113#define CEPH_MSG_CLIENT_RECONNECT 23
114
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
122
ca9d93a2
SW		 123/* pool ops */
124#define CEPH_MSG_POOLOP_REPLY 48
125#define CEPH_MSG_POOLOP 49
126
127
0dee3c28 128/* osd */
0dee3c28
SW		 129#define CEPH_MSG_OSD_MAP 41
130#define CEPH_MSG_OSD_OP 42
131#define CEPH_MSG_OSD_OPREPLY 43
132
ca9d93a2
SW		 133/* pool operations */
134enum {
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,
142};
143
13e38c8a
SW		 144struct ceph_mon_request_header {
145 __le64 have_version;
146 __le16 session_mon;
147 __le64 session_mon_tid;
148} __attribute__ ((packed));
0dee3c28
SW		 149
150struct ceph_mon_statfs {
13e38c8a 151 struct ceph_mon_request_header monhdr;
0dee3c28 152 struct ceph_fsid fsid;
0dee3c28
SW		 153} __attribute__ ((packed));
154
155struct ceph_statfs {
156 __le64 kb, kb_used, kb_avail;
157 __le64 num_objects;
158} __attribute__ ((packed));
159
160struct ceph_mon_statfs_reply {
161 struct ceph_fsid fsid;
0dee3c28
SW		 162 __le64 version;
163 struct ceph_statfs st;
164} __attribute__ ((packed));
165
ca9d93a2
SW		 166const char *ceph_pool_op_name(int op);
167
168struct ceph_mon_poolop {
169 struct ceph_mon_request_header monhdr;
170 struct ceph_fsid fsid;
171 __le32 pool;
172 __le32 op;
173 __le64 auid;
174 __le64 snapid;
175 __le32 name_len;
176} __attribute__ ((packed));
177
178struct ceph_mon_poolop_reply {
179 struct ceph_mon_request_header monhdr;
180 struct ceph_fsid fsid;
181 __le32 reply_code;
182 __le32 epoch;
183 char has_data;
184 char data[0];
185} __attribute__ ((packed));
186
187struct ceph_mon_unmanaged_snap {
188 __le64 snapid;
189} __attribute__ ((packed));
190
0dee3c28 191struct ceph_osd_getmap {
13e38c8a 192 struct ceph_mon_request_header monhdr;
0dee3c28
SW		 193 struct ceph_fsid fsid;
194 __le32 start;
195} __attribute__ ((packed));
196
197struct ceph_mds_getmap {
13e38c8a 198 struct ceph_mon_request_header monhdr;
0dee3c28
SW		 199 struct ceph_fsid fsid;
200} __attribute__ ((packed));
201
202struct ceph_client_mount {
13e38c8a 203 struct ceph_mon_request_header monhdr;
0dee3c28
SW		 204} __attribute__ ((packed));
205
206struct ceph_mon_subscribe_item {
13e38c8a 207 __le64 have_version; __le64 have;
0dee3c28
SW		 208 __u8 onetime;
209} __attribute__ ((packed));
210
07bd10fb
SW		 211struct ceph_mon_subscribe_ack {
212 __le32 duration; /* seconds */
213 struct ceph_fsid fsid;
214} __attribute__ ((packed));
215
0dee3c28
SW		 216/*
217 * mds states
218 * > 0 -> in
219 * <= 0 -> out
220 */
221#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
222#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
223 empty log. */
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 */
229
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 */
238
239extern const char *ceph_mds_state_name(int s);
240
241
242/*
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
247 */
dd1c9057
SW		 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
f0b18d9f 258#define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
dd1c9057 259#define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
0dee3c28
SW		 260
261/* client_session ops */
262enum {
263 CEPH_SESSION_REQUEST_OPEN,
264 CEPH_SESSION_OPEN,
265 CEPH_SESSION_REQUEST_CLOSE,
266 CEPH_SESSION_CLOSE,
267 CEPH_SESSION_REQUEST_RENEWCAPS,
268 CEPH_SESSION_RENEWCAPS,
269 CEPH_SESSION_STALE,
270 CEPH_SESSION_RECALL_STATE,
271};
272
273extern const char *ceph_session_op_name(int op);
274
275struct ceph_mds_session_head {
276 __le32 op;
277 __le64 seq;
278 struct ceph_timespec stamp;
279 __le32 max_caps, max_leases;
280} __attribute__ ((packed));
281
282/* client_request */
283/*
284 * metadata ops.
285 * & 0x001000 -> write op
286 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
287 & & 0x100000 -> use weird ino/path trace
288 */
289#define CEPH_MDS_OP_WRITE 0x001000
290enum {
291 CEPH_MDS_OP_LOOKUP = 0x00100,
292 CEPH_MDS_OP_GETATTR = 0x00101,
293 CEPH_MDS_OP_LOOKUPHASH = 0x00102,
294 CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
295
296 CEPH_MDS_OP_SETXATTR = 0x01105,
297 CEPH_MDS_OP_RMXATTR = 0x01106,
298 CEPH_MDS_OP_SETLAYOUT = 0x01107,
299 CEPH_MDS_OP_SETATTR = 0x01108,
300
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,
308
3ea25f94 309 CEPH_MDS_OP_CREATE = 0x01301,
0dee3c28
SW		 310 CEPH_MDS_OP_OPEN = 0x00302,
311 CEPH_MDS_OP_READDIR = 0x00305,
312
313 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
314 CEPH_MDS_OP_MKSNAP = 0x01400,
315 CEPH_MDS_OP_RMSNAP = 0x01401,
316 CEPH_MDS_OP_LSSNAP = 0x00402,
317};
318
319extern const char *ceph_mds_op_name(int op);
320
321
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
329
330union ceph_mds_request_args {
331 struct {
332 __le32 mask; /* CEPH_CAP_* */
333 } __attribute__ ((packed)) getattr;
334 struct {
335 __le32 mode;
336 __le32 uid;
337 __le32 gid;
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;
343 struct {
344 __le32 frag; /* which dir fragment */
345 __le32 max_entries; /* how many dentries to grab */
23804d91 346 __le32 max_bytes;
0dee3c28
SW		 347 } __attribute__ ((packed)) readdir;
348 struct {
349 __le32 mode;
350 __le32 rdev;
351 } __attribute__ ((packed)) mknod;
352 struct {
353 __le32 mode;
354 } __attribute__ ((packed)) mkdir;
355 struct {
356 __le32 flags;
357 __le32 mode;
358 __le32 stripe_unit; /* layout for newly created file */
359 __le32 stripe_count; /* ... */
360 __le32 object_size;
361 __le32 file_replication;
362 __le32 preferred;
363 } __attribute__ ((packed)) open;
364 struct {
365 __le32 flags;
366 } __attribute__ ((packed)) setxattr;
367 struct {
368 struct ceph_file_layout layout;
369 } __attribute__ ((packed)) setlayout;
370} __attribute__ ((packed));
371
372#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
373#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
374
375struct ceph_mds_request_head {
6df058c0 376 __le64 oldest_client_tid;
0dee3c28
SW		 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));
387
388/* cap/lease release record */
389struct 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));
396
397/* client reply */
398struct ceph_mds_reply_head {
0dee3c28
SW		 399 __le32 op;
400 __le32 result;
401 __le32 mdsmap_epoch;
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));
406
407/* one for each node split */
408struct ceph_frag_tree_split {
409 __le32 frag; /* this frag splits... */
410 __le32 by; /* ...by this many bits */
411} __attribute__ ((packed));
412
413struct ceph_frag_tree_head {
414 __le32 nsplits; /* num ceph_frag_tree_split records */
415 struct ceph_frag_tree_split splits[];
416} __attribute__ ((packed));
417
418/* capability issue, for bundling with mds reply */
419struct ceph_mds_reply_cap {
420 __le32 caps, wanted; /* caps issued, wanted */
421 __le64 cap_id;
422 __le32 seq, mseq;
423 __le64 realm; /* snap realm */
424 __u8 flags; /* CEPH_CAP_FLAG_* */
425} __attribute__ ((packed));
426
427#define CEPH_CAP_FLAG_AUTH 1 /* cap is issued by auth mds */
428
429/* inode record, for bundling with mds reply */
430struct ceph_mds_reply_inode {
431 __le64 ino;
432 __le64 snapid;
433 __le32 rdev;
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;
441 __le32 truncate_seq;
442 __le32 mode, uid, gid;
443 __le32 nlink;
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 */
449
450/* reply_lease follows dname, and reply_inode */
451struct ceph_mds_reply_lease {
452 __le16 mask; /* lease type(s) */
453 __le32 duration_ms; /* lease duration */
454 __le32 seq;
455} __attribute__ ((packed));
456
457struct 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 */
461 __le32 dist[];
462} __attribute__ ((packed));
463
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 */
471
472int ceph_flags_to_mode(int flags);
473
474
475/* capability bits */
476#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
477
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 */
487
488/* per-lock shift */
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) */
493
494#define CEPH_CAP_BITS 16
495
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)
512
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)
531
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 | \
537 CEPH_CAP_FILE_CACHE)
538
539#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
540 CEPH_CAP_LINK_EXCL | \
541 CEPH_CAP_XATTR_EXCL | \
542 CEPH_CAP_FILE_EXCL)
543#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
544 CEPH_CAP_FILE_EXCL)
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 | \
84d95092
SW		 547 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
548 CEPH_CAP_PIN)
0dee3c28
SW		 549
550#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
551 CEPH_LOCK_IXATTR)
552
553int ceph_caps_for_mode(int mode);
554
555enum {
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 */
569};
570
571extern const char *ceph_cap_op_name(int op);
572
573/*
574 * caps message, used for capability callbacks, acks, requests, etc.
575 */
576struct ceph_mds_caps {
577 __le32 op; /* CEPH_CAP_OP_* */
578 __le64 ino, realm;
579 __le64 cap_id;
580 __le32 seq, issue_seq;
581 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
582 __le32 migrate_seq;
583 __le64 snap_follows;
584 __le32 snap_trace_len;
0dee3c28
SW		 585
586 /* authlock */
587 __le32 uid, gid, mode;
588
589 /* linklock */
590 __le32 nlink;
591
592 /* xattrlock */
593 __le32 xattr_len;
594 __le64 xattr_version;
595
596 /* filelock */
597 __le64 size, max_size, truncate_size;
598 __le32 truncate_seq;
599 struct ceph_timespec mtime, atime, ctime;
600 struct ceph_file_layout layout;
601 __le32 time_warp_seq;
602} __attribute__ ((packed));
603
604/* cap release msg head */
605struct ceph_mds_cap_release {
606 __le32 num; /* number of cap_items that follow */
607} __attribute__ ((packed));
608
609struct ceph_mds_cap_item {
610 __le64 ino;
611 __le64 cap_id;
612 __le32 migrate_seq, seq;
613} __attribute__ ((packed));
614
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 */
619
620extern const char *ceph_lease_op_name(int o);
621
622/* lease msg header */
623struct ceph_mds_lease {
624 __u8 action; /* CEPH_MDS_LEASE_* */
625 __le16 mask; /* which lease */
626 __le64 ino;
627 __le64 first, last; /* snap range */
628 __le32 seq;
629 __le32 duration_ms; /* duration of renewal */
630} __attribute__ ((packed));
631/* followed by a __le32+string for dname */
632
633/* client reconnect */
634struct ceph_mds_cap_reconnect {
635 __le64 cap_id;
636 __le32 wanted;
637 __le32 issued;
638 __le64 size;
639 struct ceph_timespec mtime, atime;
640 __le64 snaprealm;
641 __le64 pathbase; /* base ino for our path to this ino */
642} __attribute__ ((packed));
643/* followed by encoded string */
644
645struct ceph_mds_snaprealm_reconnect {
646 __le64 ino; /* snap realm base */
647 __le64 seq; /* snap seq for this snap realm */
648 __le64 parent; /* parent realm */
649} __attribute__ ((packed));
650
651/*
652 * snaps
653 */
654enum {
655 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
656 CEPH_SNAP_OP_CREATE,
657 CEPH_SNAP_OP_DESTROY,
658 CEPH_SNAP_OP_SPLIT,
659};
660
661extern const char *ceph_snap_op_name(int o);
662
663/* snap msg header */
664struct ceph_mds_snap_head {
665 __le32 op; /* CEPH_SNAP_OP_* */
666 __le64 split; /* ino to split off, if any */
667 __le32 num_split_inos; /* # inos belonging to new child realm */
668 __le32 num_split_realms; /* # child realms udner new child realm */
669 __le32 trace_len; /* size of snap trace blob */
670} __attribute__ ((packed));
671/* followed by split ino list, then split realms, then the trace blob */
672
673/*
674 * encode info about a snaprealm, as viewed by a client
675 */
676struct ceph_mds_snap_realm {
677 __le64 ino; /* ino */
678 __le64 created; /* snap: when created */
679 __le64 parent; /* ino: parent realm */
680 __le64 parent_since; /* snap: same parent since */
681 __le64 seq; /* snap: version */
682 __le32 num_snaps;
683 __le32 num_prior_parent_snaps;
684} __attribute__ ((packed));
685/* followed by my snap list, then prior parent snap list */
686
687#endif
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