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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 CEPH_FS_H
13#define CEPH_FS_H
14
15#include <linux/ceph/msgr.h>
16#include <linux/ceph/rados.h>
17
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 */
24#define CEPH_OSDC_PROTOCOL 24 /* server/client */
25#define CEPH_MDSC_PROTOCOL 32 /* server/client */
26#define CEPH_MONC_PROTOCOL 15 /* server/client */
27
28
29#define CEPH_INO_ROOT 1
30#define CEPH_INO_CEPH 2 /* hidden .ceph dir */
31#define CEPH_INO_DOTDOT 3 /* used by ceph fuse for parent (..) */
32
33/* arbitrary limit on max # of monitors (cluster of 3 is typical) */
34#define CEPH_MAX_MON 31
35
36/*
37 * ceph_file_layout - describe data layout for a file/inode
38 */
39struct ceph_file_layout {
40 /* file -> object mapping */
41 __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
42 of page size. */
43 __le32 fl_stripe_count; /* over this many objects */
44 __le32 fl_object_size; /* until objects are this big, then move to
45 new objects */
46 __le32 fl_cas_hash; /* UNUSED. 0 = none; 1 = sha256 */
47
48 /* pg -> disk layout */
49 __le32 fl_object_stripe_unit; /* UNUSED. for per-object parity, if any */
50
51 /* object -> pg layout */
52 __le32 fl_unused; /* unused; used to be preferred primary for pg (-1 for none) */
53 __le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
54} __attribute__ ((packed));
55
56#define ceph_file_layout_su(l) ((__s32)le32_to_cpu((l).fl_stripe_unit))
57#define ceph_file_layout_stripe_count(l) \
58 ((__s32)le32_to_cpu((l).fl_stripe_count))
59#define ceph_file_layout_object_size(l) ((__s32)le32_to_cpu((l).fl_object_size))
60#define ceph_file_layout_cas_hash(l) ((__s32)le32_to_cpu((l).fl_cas_hash))
61#define ceph_file_layout_object_su(l) \
62 ((__s32)le32_to_cpu((l).fl_object_stripe_unit))
63#define ceph_file_layout_pg_pool(l) \
64 ((__s32)le32_to_cpu((l).fl_pg_pool))
65
66static inline unsigned ceph_file_layout_stripe_width(struct ceph_file_layout *l)
67{
68 return le32_to_cpu(l->fl_stripe_unit) *
69 le32_to_cpu(l->fl_stripe_count);
70}
71
72/* "period" == bytes before i start on a new set of objects */
73static inline unsigned ceph_file_layout_period(struct ceph_file_layout *l)
74{
75 return le32_to_cpu(l->fl_object_size) *
76 le32_to_cpu(l->fl_stripe_count);
77}
78
79#define CEPH_MIN_STRIPE_UNIT 65536
80
81int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
82
83struct ceph_dir_layout {
84 __u8 dl_dir_hash; /* see ceph_hash.h for ids */
85 __u8 dl_unused1;
86 __u16 dl_unused2;
87 __u32 dl_unused3;
88} __attribute__ ((packed));
89
90/* crypto algorithms */
91#define CEPH_CRYPTO_NONE 0x0
92#define CEPH_CRYPTO_AES 0x1
93
94#define CEPH_AES_IV "cephsageyudagreg"
95
96/* security/authentication protocols */
97#define CEPH_AUTH_UNKNOWN 0x0
98#define CEPH_AUTH_NONE 0x1
99#define CEPH_AUTH_CEPHX 0x2
100
101#define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
102
103
104/*********************************************
105 * message layer
106 */
107
108/*
109 * message types
110 */
111
112/* misc */
113#define CEPH_MSG_SHUTDOWN 1
114#define CEPH_MSG_PING 2
115
116/* client <-> monitor */
117#define CEPH_MSG_MON_MAP 4
118#define CEPH_MSG_MON_GET_MAP 5
119#define CEPH_MSG_STATFS 13
120#define CEPH_MSG_STATFS_REPLY 14
121#define CEPH_MSG_MON_SUBSCRIBE 15
122#define CEPH_MSG_MON_SUBSCRIBE_ACK 16
123#define CEPH_MSG_AUTH 17
124#define CEPH_MSG_AUTH_REPLY 18
125#define CEPH_MSG_MON_GET_VERSION 19
126#define CEPH_MSG_MON_GET_VERSION_REPLY 20
127
128/* client <-> mds */
129#define CEPH_MSG_MDS_MAP 21
130
131#define CEPH_MSG_CLIENT_SESSION 22
132#define CEPH_MSG_CLIENT_RECONNECT 23
133
134#define CEPH_MSG_CLIENT_REQUEST 24
135#define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
136#define CEPH_MSG_CLIENT_REPLY 26
137#define CEPH_MSG_CLIENT_CAPS 0x310
138#define CEPH_MSG_CLIENT_LEASE 0x311
139#define CEPH_MSG_CLIENT_SNAP 0x312
140#define CEPH_MSG_CLIENT_CAPRELEASE 0x313
141
142/* pool ops */
143#define CEPH_MSG_POOLOP_REPLY 48
144#define CEPH_MSG_POOLOP 49
145
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
153
154/* watch-notify operations */
155enum {
156 WATCH_NOTIFY = 1, /* notifying watcher */
157 WATCH_NOTIFY_COMPLETE = 2, /* notifier notified when done */
158};
159
160
161struct ceph_mon_request_header {
162 __le64 have_version;
163 __le16 session_mon;
164 __le64 session_mon_tid;
165} __attribute__ ((packed));
166
167struct ceph_mon_statfs {
168 struct ceph_mon_request_header monhdr;
169 struct ceph_fsid fsid;
170} __attribute__ ((packed));
171
172struct ceph_statfs {
173 __le64 kb, kb_used, kb_avail;
174 __le64 num_objects;
175} __attribute__ ((packed));
176
177struct ceph_mon_statfs_reply {
178 struct ceph_fsid fsid;
179 __le64 version;
180 struct ceph_statfs st;
181} __attribute__ ((packed));
182
183struct ceph_osd_getmap {
184 struct ceph_mon_request_header monhdr;
185 struct ceph_fsid fsid;
186 __le32 start;
187} __attribute__ ((packed));
188
189struct ceph_mds_getmap {
190 struct ceph_mon_request_header monhdr;
191 struct ceph_fsid fsid;
192} __attribute__ ((packed));
193
194struct ceph_client_mount {
195 struct ceph_mon_request_header monhdr;
196} __attribute__ ((packed));
197
198#define CEPH_SUBSCRIBE_ONETIME 1 /* i want only 1 update after have */
199
200struct ceph_mon_subscribe_item {
201 __le64 have_version; __le64 have;
202 __u8 onetime;
203} __attribute__ ((packed));
204
205struct ceph_mon_subscribe_ack {
206 __le32 duration; /* seconds */
207 struct ceph_fsid fsid;
208} __attribute__ ((packed));
209
210/*
211 * mdsmap flags
212 */
213#define CEPH_MDSMAP_DOWN (1<<0) /* cluster deliberately down */
214
215/*
216 * mds states
217 * > 0 -> in
218 * <= 0 -> out
219 */
220#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
221#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
222 empty log. */
223#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
224#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
225#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
226#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
227#define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
228#define CEPH_MDS_STATE_REPLAYONCE -9 /* up, replaying an 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 */
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 */
260#define CEPH_LOCK_IPOLICY 16384 /* policy lock on dirs. MDS internal */
261
262/* client_session ops */
263enum {
264 CEPH_SESSION_REQUEST_OPEN,
265 CEPH_SESSION_OPEN,
266 CEPH_SESSION_REQUEST_CLOSE,
267 CEPH_SESSION_CLOSE,
268 CEPH_SESSION_REQUEST_RENEWCAPS,
269 CEPH_SESSION_RENEWCAPS,
270 CEPH_SESSION_STALE,
271 CEPH_SESSION_RECALL_STATE,
272 CEPH_SESSION_FLUSHMSG,
273 CEPH_SESSION_FLUSHMSG_ACK,
274 CEPH_SESSION_FORCE_RO,
275};
276
277extern const char *ceph_session_op_name(int op);
278
279struct ceph_mds_session_head {
280 __le32 op;
281 __le64 seq;
282 struct ceph_timespec stamp;
283 __le32 max_caps, max_leases;
284} __attribute__ ((packed));
285
286/* client_request */
287/*
288 * metadata ops.
289 * & 0x001000 -> write op
290 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
291 & & 0x100000 -> use weird ino/path trace
292 */
293#define CEPH_MDS_OP_WRITE 0x001000
294enum {
295 CEPH_MDS_OP_LOOKUP = 0x00100,
296 CEPH_MDS_OP_GETATTR = 0x00101,
297 CEPH_MDS_OP_LOOKUPHASH = 0x00102,
298 CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
299 CEPH_MDS_OP_LOOKUPINO = 0x00104,
300 CEPH_MDS_OP_LOOKUPNAME = 0x00105,
301
302 CEPH_MDS_OP_SETXATTR = 0x01105,
303 CEPH_MDS_OP_RMXATTR = 0x01106,
304 CEPH_MDS_OP_SETLAYOUT = 0x01107,
305 CEPH_MDS_OP_SETATTR = 0x01108,
306 CEPH_MDS_OP_SETFILELOCK= 0x01109,
307 CEPH_MDS_OP_GETFILELOCK= 0x00110,
308 CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
309
310 CEPH_MDS_OP_MKNOD = 0x01201,
311 CEPH_MDS_OP_LINK = 0x01202,
312 CEPH_MDS_OP_UNLINK = 0x01203,
313 CEPH_MDS_OP_RENAME = 0x01204,
314 CEPH_MDS_OP_MKDIR = 0x01220,
315 CEPH_MDS_OP_RMDIR = 0x01221,
316 CEPH_MDS_OP_SYMLINK = 0x01222,
317
318 CEPH_MDS_OP_CREATE = 0x01301,
319 CEPH_MDS_OP_OPEN = 0x00302,
320 CEPH_MDS_OP_READDIR = 0x00305,
321
322 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
323 CEPH_MDS_OP_MKSNAP = 0x01400,
324 CEPH_MDS_OP_RMSNAP = 0x01401,
325 CEPH_MDS_OP_LSSNAP = 0x00402,
326};
327
328extern const char *ceph_mds_op_name(int op);
329
330
331#define CEPH_SETATTR_MODE 1
332#define CEPH_SETATTR_UID 2
333#define CEPH_SETATTR_GID 4
334#define CEPH_SETATTR_MTIME 8
335#define CEPH_SETATTR_ATIME 16
336#define CEPH_SETATTR_SIZE 32
337#define CEPH_SETATTR_CTIME 64
338
339/*
340 * Ceph setxattr request flags.
341 */
342#define CEPH_XATTR_CREATE (1 << 0)
343#define CEPH_XATTR_REPLACE (1 << 1)
344#define CEPH_XATTR_REMOVE (1 << 31)
345
346union ceph_mds_request_args {
347 struct {
348 __le32 mask; /* CEPH_CAP_* */
349 } __attribute__ ((packed)) getattr;
350 struct {
351 __le32 mode;
352 __le32 uid;
353 __le32 gid;
354 struct ceph_timespec mtime;
355 struct ceph_timespec atime;
356 __le64 size, old_size; /* old_size needed by truncate */
357 __le32 mask; /* CEPH_SETATTR_* */
358 } __attribute__ ((packed)) setattr;
359 struct {
360 __le32 frag; /* which dir fragment */
361 __le32 max_entries; /* how many dentries to grab */
362 __le32 max_bytes;
363 } __attribute__ ((packed)) readdir;
364 struct {
365 __le32 mode;
366 __le32 rdev;
367 } __attribute__ ((packed)) mknod;
368 struct {
369 __le32 mode;
370 } __attribute__ ((packed)) mkdir;
371 struct {
372 __le32 flags;
373 __le32 mode;
374 __le32 stripe_unit; /* layout for newly created file */
375 __le32 stripe_count; /* ... */
376 __le32 object_size;
377 __le32 file_replication;
378 __le32 unused; /* used to be preferred osd */
379 } __attribute__ ((packed)) open;
380 struct {
381 __le32 flags;
382 } __attribute__ ((packed)) setxattr;
383 struct {
384 struct ceph_file_layout layout;
385 } __attribute__ ((packed)) setlayout;
386 struct {
387 __u8 rule; /* currently fcntl or flock */
388 __u8 type; /* shared, exclusive, remove*/
389 __le64 owner; /* owner of the lock */
390 __le64 pid; /* process id requesting the lock */
391 __le64 start; /* initial location to lock */
392 __le64 length; /* num bytes to lock from start */
393 __u8 wait; /* will caller wait for lock to become available? */
394 } __attribute__ ((packed)) filelock_change;
395} __attribute__ ((packed));
396
397#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
398#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
399
400struct ceph_mds_request_head {
401 __le64 oldest_client_tid;
402 __le32 mdsmap_epoch; /* on client */
403 __le32 flags; /* CEPH_MDS_FLAG_* */
404 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
405 __le16 num_releases; /* # include cap/lease release records */
406 __le32 op; /* mds op code */
407 __le32 caller_uid, caller_gid;
408 __le64 ino; /* use this ino for openc, mkdir, mknod,
409 etc. (if replaying) */
410 union ceph_mds_request_args args;
411} __attribute__ ((packed));
412
413/* cap/lease release record */
414struct ceph_mds_request_release {
415 __le64 ino, cap_id; /* ino and unique cap id */
416 __le32 caps, wanted; /* new issued, wanted */
417 __le32 seq, issue_seq, mseq;
418 __le32 dname_seq; /* if releasing a dentry lease, a */
419 __le32 dname_len; /* string follows. */
420} __attribute__ ((packed));
421
422/* client reply */
423struct ceph_mds_reply_head {
424 __le32 op;
425 __le32 result;
426 __le32 mdsmap_epoch;
427 __u8 safe; /* true if committed to disk */
428 __u8 is_dentry, is_target; /* true if dentry, target inode records
429 are included with reply */
430} __attribute__ ((packed));
431
432/* one for each node split */
433struct ceph_frag_tree_split {
434 __le32 frag; /* this frag splits... */
435 __le32 by; /* ...by this many bits */
436} __attribute__ ((packed));
437
438struct ceph_frag_tree_head {
439 __le32 nsplits; /* num ceph_frag_tree_split records */
440 struct ceph_frag_tree_split splits[];
441} __attribute__ ((packed));
442
443/* capability issue, for bundling with mds reply */
444struct ceph_mds_reply_cap {
445 __le32 caps, wanted; /* caps issued, wanted */
446 __le64 cap_id;
447 __le32 seq, mseq;
448 __le64 realm; /* snap realm */
449 __u8 flags; /* CEPH_CAP_FLAG_* */
450} __attribute__ ((packed));
451
452#define CEPH_CAP_FLAG_AUTH (1 << 0) /* cap is issued by auth mds */
453#define CEPH_CAP_FLAG_RELEASE (1 << 1) /* release the cap */
454
455/* inode record, for bundling with mds reply */
456struct ceph_mds_reply_inode {
457 __le64 ino;
458 __le64 snapid;
459 __le32 rdev;
460 __le64 version; /* inode version */
461 __le64 xattr_version; /* version for xattr blob */
462 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
463 struct ceph_file_layout layout;
464 struct ceph_timespec ctime, mtime, atime;
465 __le32 time_warp_seq;
466 __le64 size, max_size, truncate_size;
467 __le32 truncate_seq;
468 __le32 mode, uid, gid;
469 __le32 nlink;
470 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
471 struct ceph_timespec rctime;
472 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
473} __attribute__ ((packed));
474/* followed by frag array, symlink string, dir layout, xattr blob */
475
476/* reply_lease follows dname, and reply_inode */
477struct ceph_mds_reply_lease {
478 __le16 mask; /* lease type(s) */
479 __le32 duration_ms; /* lease duration */
480 __le32 seq;
481} __attribute__ ((packed));
482
483struct ceph_mds_reply_dirfrag {
484 __le32 frag; /* fragment */
485 __le32 auth; /* auth mds, if this is a delegation point */
486 __le32 ndist; /* number of mds' this is replicated on */
487 __le32 dist[];
488} __attribute__ ((packed));
489
490#define CEPH_LOCK_FCNTL 1
491#define CEPH_LOCK_FLOCK 2
492#define CEPH_LOCK_FCNTL_INTR 3
493#define CEPH_LOCK_FLOCK_INTR 4
494
495
496#define CEPH_LOCK_SHARED 1
497#define CEPH_LOCK_EXCL 2
498#define CEPH_LOCK_UNLOCK 4
499
500struct ceph_filelock {
501 __le64 start;/* file offset to start lock at */
502 __le64 length; /* num bytes to lock; 0 for all following start */
503 __le64 client; /* which client holds the lock */
504 __le64 owner; /* owner the lock */
505 __le64 pid; /* process id holding the lock on the client */
506 __u8 type; /* shared lock, exclusive lock, or unlock */
507} __attribute__ ((packed));
508
509
510/* file access modes */
511#define CEPH_FILE_MODE_PIN 0
512#define CEPH_FILE_MODE_RD 1
513#define CEPH_FILE_MODE_WR 2
514#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
515#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
516#define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
517
518int ceph_flags_to_mode(int flags);
519
520#define CEPH_INLINE_NONE ((__u64)-1)
521
522/* capability bits */
523#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
524
525/* generic cap bits */
526#define CEPH_CAP_GSHARED 1 /* client can reads */
527#define CEPH_CAP_GEXCL 2 /* client can read and update */
528#define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
529#define CEPH_CAP_GRD 8 /* (file) client can read */
530#define CEPH_CAP_GWR 16 /* (file) client can write */
531#define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
532#define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
533#define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
534
535#define CEPH_CAP_SIMPLE_BITS 2
536#define CEPH_CAP_FILE_BITS 8
537
538/* per-lock shift */
539#define CEPH_CAP_SAUTH 2
540#define CEPH_CAP_SLINK 4
541#define CEPH_CAP_SXATTR 6
542#define CEPH_CAP_SFILE 8
543#define CEPH_CAP_SFLOCK 20
544
545#define CEPH_CAP_BITS 22
546
547/* composed values */
548#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
549#define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
550#define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
551#define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
552#define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
553#define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
554#define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
555#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
556#define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
557#define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
558#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
559#define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
560#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
561#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
562#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
563#define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
564#define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
565
566
567/* cap masks (for getattr) */
568#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
569#define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
570#define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
571#define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
572#define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
573#define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
574#define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
575#define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
576#define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
577#define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
578#define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
579#define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
580#define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
581 CEPH_CAP_AUTH_SHARED | \
582 CEPH_CAP_LINK_SHARED | \
583 CEPH_CAP_FILE_SHARED | \
584 CEPH_CAP_XATTR_SHARED)
585#define CEPH_STAT_CAP_INLINE_DATA (CEPH_CAP_FILE_SHARED | \
586 CEPH_CAP_FILE_RD)
587
588#define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
589 CEPH_CAP_LINK_SHARED | \
590 CEPH_CAP_XATTR_SHARED | \
591 CEPH_CAP_FILE_SHARED)
592#define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
593 CEPH_CAP_FILE_CACHE)
594
595#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
596 CEPH_CAP_LINK_EXCL | \
597 CEPH_CAP_XATTR_EXCL | \
598 CEPH_CAP_FILE_EXCL)
599#define CEPH_CAP_ANY_FILE_RD (CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | \
600 CEPH_CAP_FILE_SHARED)
601#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
602 CEPH_CAP_FILE_EXCL)
603#define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
604#define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
605 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
606 CEPH_CAP_PIN)
607
608#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
609 CEPH_LOCK_IXATTR)
610
611int ceph_caps_for_mode(int mode);
612
613enum {
614 CEPH_CAP_OP_GRANT, /* mds->client grant */
615 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
616 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
617 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
618 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
619 CEPH_CAP_OP_UPDATE, /* client->mds update */
620 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
621 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
622 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
623 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
624 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
625 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
626 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
627};
628
629extern const char *ceph_cap_op_name(int op);
630
631/*
632 * caps message, used for capability callbacks, acks, requests, etc.
633 */
634struct ceph_mds_caps {
635 __le32 op; /* CEPH_CAP_OP_* */
636 __le64 ino, realm;
637 __le64 cap_id;
638 __le32 seq, issue_seq;
639 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
640 __le32 migrate_seq;
641 __le64 snap_follows;
642 __le32 snap_trace_len;
643
644 /* authlock */
645 __le32 uid, gid, mode;
646
647 /* linklock */
648 __le32 nlink;
649
650 /* xattrlock */
651 __le32 xattr_len;
652 __le64 xattr_version;
653
654 /* filelock */
655 __le64 size, max_size, truncate_size;
656 __le32 truncate_seq;
657 struct ceph_timespec mtime, atime, ctime;
658 struct ceph_file_layout layout;
659 __le32 time_warp_seq;
660} __attribute__ ((packed));
661
662struct ceph_mds_cap_peer {
663 __le64 cap_id;
664 __le32 seq;
665 __le32 mseq;
666 __le32 mds;
667 __u8 flags;
668} __attribute__ ((packed));
669
670/* cap release msg head */
671struct ceph_mds_cap_release {
672 __le32 num; /* number of cap_items that follow */
673} __attribute__ ((packed));
674
675struct ceph_mds_cap_item {
676 __le64 ino;
677 __le64 cap_id;
678 __le32 migrate_seq, seq;
679} __attribute__ ((packed));
680
681#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
682#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
683#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
684#define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
685
686extern const char *ceph_lease_op_name(int o);
687
688/* lease msg header */
689struct ceph_mds_lease {
690 __u8 action; /* CEPH_MDS_LEASE_* */
691 __le16 mask; /* which lease */
692 __le64 ino;
693 __le64 first, last; /* snap range */
694 __le32 seq;
695 __le32 duration_ms; /* duration of renewal */
696} __attribute__ ((packed));
697/* followed by a __le32+string for dname */
698
699/* client reconnect */
700struct ceph_mds_cap_reconnect {
701 __le64 cap_id;
702 __le32 wanted;
703 __le32 issued;
704 __le64 snaprealm;
705 __le64 pathbase; /* base ino for our path to this ino */
706 __le32 flock_len; /* size of flock state blob, if any */
707} __attribute__ ((packed));
708/* followed by flock blob */
709
710struct ceph_mds_cap_reconnect_v1 {
711 __le64 cap_id;
712 __le32 wanted;
713 __le32 issued;
714 __le64 size;
715 struct ceph_timespec mtime, atime;
716 __le64 snaprealm;
717 __le64 pathbase; /* base ino for our path to this ino */
718} __attribute__ ((packed));
719
720struct ceph_mds_snaprealm_reconnect {
721 __le64 ino; /* snap realm base */
722 __le64 seq; /* snap seq for this snap realm */
723 __le64 parent; /* parent realm */
724} __attribute__ ((packed));
725
726/*
727 * snaps
728 */
729enum {
730 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
731 CEPH_SNAP_OP_CREATE,
732 CEPH_SNAP_OP_DESTROY,
733 CEPH_SNAP_OP_SPLIT,
734};
735
736extern const char *ceph_snap_op_name(int o);
737
738/* snap msg header */
739struct ceph_mds_snap_head {
740 __le32 op; /* CEPH_SNAP_OP_* */
741 __le64 split; /* ino to split off, if any */
742 __le32 num_split_inos; /* # inos belonging to new child realm */
743 __le32 num_split_realms; /* # child realms udner new child realm */
744 __le32 trace_len; /* size of snap trace blob */
745} __attribute__ ((packed));
746/* followed by split ino list, then split realms, then the trace blob */
747
748/*
749 * encode info about a snaprealm, as viewed by a client
750 */
751struct ceph_mds_snap_realm {
752 __le64 ino; /* ino */
753 __le64 created; /* snap: when created */
754 __le64 parent; /* ino: parent realm */
755 __le64 parent_since; /* snap: same parent since */
756 __le64 seq; /* snap: version */
757 __le32 num_snaps;
758 __le32 num_prior_parent_snaps;
759} __attribute__ ((packed));
760/* followed by my snap list, then prior parent snap list */
761
762#endif