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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 CEPH_WATCH_EVENT_NOTIFY = 1, /* notifying watcher */
157 CEPH_WATCH_EVENT_NOTIFY_COMPLETE = 2, /* notifier notified when done */
158 CEPH_WATCH_EVENT_DISCONNECT = 3, /* we were disconnected */
159};
160
161
162struct ceph_mon_request_header {
163 __le64 have_version;
164 __le16 session_mon;
165 __le64 session_mon_tid;
166} __attribute__ ((packed));
167
168struct ceph_mon_statfs {
169 struct ceph_mon_request_header monhdr;
170 struct ceph_fsid fsid;
171} __attribute__ ((packed));
172
173struct ceph_statfs {
174 __le64 kb, kb_used, kb_avail;
175 __le64 num_objects;
176} __attribute__ ((packed));
177
178struct ceph_mon_statfs_reply {
179 struct ceph_fsid fsid;
180 __le64 version;
181 struct ceph_statfs st;
182} __attribute__ ((packed));
183
184struct ceph_osd_getmap {
185 struct ceph_mon_request_header monhdr;
186 struct ceph_fsid fsid;
187 __le32 start;
188} __attribute__ ((packed));
189
190struct ceph_mds_getmap {
191 struct ceph_mon_request_header monhdr;
192 struct ceph_fsid fsid;
193} __attribute__ ((packed));
194
195struct ceph_client_mount {
196 struct ceph_mon_request_header monhdr;
197} __attribute__ ((packed));
198
199#define CEPH_SUBSCRIBE_ONETIME 1 /* i want only 1 update after have */
200
201struct ceph_mon_subscribe_item {
202 __le64 start;
203 __u8 flags;
204} __attribute__ ((packed));
205
206struct ceph_mon_subscribe_ack {
207 __le32 duration; /* seconds */
208 struct ceph_fsid fsid;
209} __attribute__ ((packed));
210
211#define CEPH_FS_CLUSTER_ID_NONE -1
212
213/*
214 * mdsmap flags
215 */
216#define CEPH_MDSMAP_DOWN (1<<0) /* cluster deliberately down */
217
218/*
219 * mds states
220 * > 0 -> in
221 * <= 0 -> out
222 */
223#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
224#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
225 empty log. */
226#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
227#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
228#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
229#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
230#define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
231#define CEPH_MDS_STATE_REPLAYONCE -9 /* up, replaying an active node's journal */
232
233#define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
234#define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
235 operations (import, rename, etc.) */
236#define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
237#define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
238#define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
239#define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
240#define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
241
242extern const char *ceph_mds_state_name(int s);
243
244
245/*
246 * metadata lock types.
247 * - these are bitmasks.. we can compose them
248 * - they also define the lock ordering by the MDS
249 * - a few of these are internal to the mds
250 */
251#define CEPH_LOCK_DVERSION 1
252#define CEPH_LOCK_DN 2
253#define CEPH_LOCK_ISNAP 16
254#define CEPH_LOCK_IVERSION 32 /* mds internal */
255#define CEPH_LOCK_IFILE 64
256#define CEPH_LOCK_IAUTH 128
257#define CEPH_LOCK_ILINK 256
258#define CEPH_LOCK_IDFT 512 /* dir frag tree */
259#define CEPH_LOCK_INEST 1024 /* mds internal */
260#define CEPH_LOCK_IXATTR 2048
261#define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
262#define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
263#define CEPH_LOCK_IPOLICY 16384 /* policy lock on dirs. MDS internal */
264
265/* client_session ops */
266enum {
267 CEPH_SESSION_REQUEST_OPEN,
268 CEPH_SESSION_OPEN,
269 CEPH_SESSION_REQUEST_CLOSE,
270 CEPH_SESSION_CLOSE,
271 CEPH_SESSION_REQUEST_RENEWCAPS,
272 CEPH_SESSION_RENEWCAPS,
273 CEPH_SESSION_STALE,
274 CEPH_SESSION_RECALL_STATE,
275 CEPH_SESSION_FLUSHMSG,
276 CEPH_SESSION_FLUSHMSG_ACK,
277 CEPH_SESSION_FORCE_RO,
278};
279
280extern const char *ceph_session_op_name(int op);
281
282struct ceph_mds_session_head {
283 __le32 op;
284 __le64 seq;
285 struct ceph_timespec stamp;
286 __le32 max_caps, max_leases;
287} __attribute__ ((packed));
288
289/* client_request */
290/*
291 * metadata ops.
292 * & 0x001000 -> write op
293 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
294 & & 0x100000 -> use weird ino/path trace
295 */
296#define CEPH_MDS_OP_WRITE 0x001000
297enum {
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,
303 CEPH_MDS_OP_LOOKUPNAME = 0x00105,
304
305 CEPH_MDS_OP_SETXATTR = 0x01105,
306 CEPH_MDS_OP_RMXATTR = 0x01106,
307 CEPH_MDS_OP_SETLAYOUT = 0x01107,
308 CEPH_MDS_OP_SETATTR = 0x01108,
309 CEPH_MDS_OP_SETFILELOCK= 0x01109,
310 CEPH_MDS_OP_GETFILELOCK= 0x00110,
311 CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
312
313 CEPH_MDS_OP_MKNOD = 0x01201,
314 CEPH_MDS_OP_LINK = 0x01202,
315 CEPH_MDS_OP_UNLINK = 0x01203,
316 CEPH_MDS_OP_RENAME = 0x01204,
317 CEPH_MDS_OP_MKDIR = 0x01220,
318 CEPH_MDS_OP_RMDIR = 0x01221,
319 CEPH_MDS_OP_SYMLINK = 0x01222,
320
321 CEPH_MDS_OP_CREATE = 0x01301,
322 CEPH_MDS_OP_OPEN = 0x00302,
323 CEPH_MDS_OP_READDIR = 0x00305,
324
325 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
326 CEPH_MDS_OP_MKSNAP = 0x01400,
327 CEPH_MDS_OP_RMSNAP = 0x01401,
328 CEPH_MDS_OP_LSSNAP = 0x00402,
329 CEPH_MDS_OP_RENAMESNAP = 0x01403,
330};
331
332extern const char *ceph_mds_op_name(int op);
333
334
335#define CEPH_SETATTR_MODE 1
336#define CEPH_SETATTR_UID 2
337#define CEPH_SETATTR_GID 4
338#define CEPH_SETATTR_MTIME 8
339#define CEPH_SETATTR_ATIME 16
340#define CEPH_SETATTR_SIZE 32
341#define CEPH_SETATTR_CTIME 64
342
343/*
344 * Ceph setxattr request flags.
345 */
346#define CEPH_XATTR_CREATE (1 << 0)
347#define CEPH_XATTR_REPLACE (1 << 1)
348#define CEPH_XATTR_REMOVE (1 << 31)
349
350/*
351 * readdir request flags;
352 */
353#define CEPH_READDIR_REPLY_BITFLAGS (1<<0)
354
355/*
356 * readdir reply flags.
357 */
358#define CEPH_READDIR_FRAG_END (1<<0)
359#define CEPH_READDIR_FRAG_COMPLETE (1<<8)
360#define CEPH_READDIR_HASH_ORDER (1<<9)
361
362union ceph_mds_request_args {
363 struct {
364 __le32 mask; /* CEPH_CAP_* */
365 } __attribute__ ((packed)) getattr;
366 struct {
367 __le32 mode;
368 __le32 uid;
369 __le32 gid;
370 struct ceph_timespec mtime;
371 struct ceph_timespec atime;
372 __le64 size, old_size; /* old_size needed by truncate */
373 __le32 mask; /* CEPH_SETATTR_* */
374 } __attribute__ ((packed)) setattr;
375 struct {
376 __le32 frag; /* which dir fragment */
377 __le32 max_entries; /* how many dentries to grab */
378 __le32 max_bytes;
379 __le16 flags;
380 } __attribute__ ((packed)) readdir;
381 struct {
382 __le32 mode;
383 __le32 rdev;
384 } __attribute__ ((packed)) mknod;
385 struct {
386 __le32 mode;
387 } __attribute__ ((packed)) mkdir;
388 struct {
389 __le32 flags;
390 __le32 mode;
391 __le32 stripe_unit; /* layout for newly created file */
392 __le32 stripe_count; /* ... */
393 __le32 object_size;
394 __le32 file_replication;
395 __le32 mask; /* CEPH_CAP_* */
396 __le32 old_size;
397 } __attribute__ ((packed)) open;
398 struct {
399 __le32 flags;
400 } __attribute__ ((packed)) setxattr;
401 struct {
402 struct ceph_file_layout layout;
403 } __attribute__ ((packed)) setlayout;
404 struct {
405 __u8 rule; /* currently fcntl or flock */
406 __u8 type; /* shared, exclusive, remove*/
407 __le64 owner; /* owner of the lock */
408 __le64 pid; /* process id requesting the lock */
409 __le64 start; /* initial location to lock */
410 __le64 length; /* num bytes to lock from start */
411 __u8 wait; /* will caller wait for lock to become available? */
412 } __attribute__ ((packed)) filelock_change;
413} __attribute__ ((packed));
414
415#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
416#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
417
418struct ceph_mds_request_head {
419 __le64 oldest_client_tid;
420 __le32 mdsmap_epoch; /* on client */
421 __le32 flags; /* CEPH_MDS_FLAG_* */
422 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
423 __le16 num_releases; /* # include cap/lease release records */
424 __le32 op; /* mds op code */
425 __le32 caller_uid, caller_gid;
426 __le64 ino; /* use this ino for openc, mkdir, mknod,
427 etc. (if replaying) */
428 union ceph_mds_request_args args;
429} __attribute__ ((packed));
430
431/* cap/lease release record */
432struct ceph_mds_request_release {
433 __le64 ino, cap_id; /* ino and unique cap id */
434 __le32 caps, wanted; /* new issued, wanted */
435 __le32 seq, issue_seq, mseq;
436 __le32 dname_seq; /* if releasing a dentry lease, a */
437 __le32 dname_len; /* string follows. */
438} __attribute__ ((packed));
439
440/* client reply */
441struct ceph_mds_reply_head {
442 __le32 op;
443 __le32 result;
444 __le32 mdsmap_epoch;
445 __u8 safe; /* true if committed to disk */
446 __u8 is_dentry, is_target; /* true if dentry, target inode records
447 are included with reply */
448} __attribute__ ((packed));
449
450/* one for each node split */
451struct ceph_frag_tree_split {
452 __le32 frag; /* this frag splits... */
453 __le32 by; /* ...by this many bits */
454} __attribute__ ((packed));
455
456struct ceph_frag_tree_head {
457 __le32 nsplits; /* num ceph_frag_tree_split records */
458 struct ceph_frag_tree_split splits[];
459} __attribute__ ((packed));
460
461/* capability issue, for bundling with mds reply */
462struct ceph_mds_reply_cap {
463 __le32 caps, wanted; /* caps issued, wanted */
464 __le64 cap_id;
465 __le32 seq, mseq;
466 __le64 realm; /* snap realm */
467 __u8 flags; /* CEPH_CAP_FLAG_* */
468} __attribute__ ((packed));
469
470#define CEPH_CAP_FLAG_AUTH (1 << 0) /* cap is issued by auth mds */
471#define CEPH_CAP_FLAG_RELEASE (1 << 1) /* release the cap */
472
473/* inode record, for bundling with mds reply */
474struct ceph_mds_reply_inode {
475 __le64 ino;
476 __le64 snapid;
477 __le32 rdev;
478 __le64 version; /* inode version */
479 __le64 xattr_version; /* version for xattr blob */
480 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
481 struct ceph_file_layout layout;
482 struct ceph_timespec ctime, mtime, atime;
483 __le32 time_warp_seq;
484 __le64 size, max_size, truncate_size;
485 __le32 truncate_seq;
486 __le32 mode, uid, gid;
487 __le32 nlink;
488 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
489 struct ceph_timespec rctime;
490 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
491} __attribute__ ((packed));
492/* followed by frag array, symlink string, dir layout, xattr blob */
493
494/* reply_lease follows dname, and reply_inode */
495struct ceph_mds_reply_lease {
496 __le16 mask; /* lease type(s) */
497 __le32 duration_ms; /* lease duration */
498 __le32 seq;
499} __attribute__ ((packed));
500
501struct ceph_mds_reply_dirfrag {
502 __le32 frag; /* fragment */
503 __le32 auth; /* auth mds, if this is a delegation point */
504 __le32 ndist; /* number of mds' this is replicated on */
505 __le32 dist[];
506} __attribute__ ((packed));
507
508#define CEPH_LOCK_FCNTL 1
509#define CEPH_LOCK_FLOCK 2
510#define CEPH_LOCK_FCNTL_INTR 3
511#define CEPH_LOCK_FLOCK_INTR 4
512
513
514#define CEPH_LOCK_SHARED 1
515#define CEPH_LOCK_EXCL 2
516#define CEPH_LOCK_UNLOCK 4
517
518struct ceph_filelock {
519 __le64 start;/* file offset to start lock at */
520 __le64 length; /* num bytes to lock; 0 for all following start */
521 __le64 client; /* which client holds the lock */
522 __le64 owner; /* owner the lock */
523 __le64 pid; /* process id holding the lock on the client */
524 __u8 type; /* shared lock, exclusive lock, or unlock */
525} __attribute__ ((packed));
526
527
528/* file access modes */
529#define CEPH_FILE_MODE_PIN 0
530#define CEPH_FILE_MODE_RD 1
531#define CEPH_FILE_MODE_WR 2
532#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
533#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
534#define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
535
536int ceph_flags_to_mode(int flags);
537
538#define CEPH_INLINE_NONE ((__u64)-1)
539
540/* capability bits */
541#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
542
543/* generic cap bits */
544#define CEPH_CAP_GSHARED 1 /* client can reads */
545#define CEPH_CAP_GEXCL 2 /* client can read and update */
546#define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
547#define CEPH_CAP_GRD 8 /* (file) client can read */
548#define CEPH_CAP_GWR 16 /* (file) client can write */
549#define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
550#define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
551#define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
552
553#define CEPH_CAP_SIMPLE_BITS 2
554#define CEPH_CAP_FILE_BITS 8
555
556/* per-lock shift */
557#define CEPH_CAP_SAUTH 2
558#define CEPH_CAP_SLINK 4
559#define CEPH_CAP_SXATTR 6
560#define CEPH_CAP_SFILE 8
561#define CEPH_CAP_SFLOCK 20
562
563#define CEPH_CAP_BITS 22
564
565/* composed values */
566#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
567#define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
568#define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
569#define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
570#define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
571#define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
572#define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
573#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
574#define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
575#define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
576#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
577#define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
578#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
579#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
580#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
581#define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
582#define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
583
584
585/* cap masks (for getattr) */
586#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
587#define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
588#define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
589#define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
590#define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
591#define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
592#define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
593#define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
594#define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
595#define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
596#define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
597#define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
598#define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
599 CEPH_CAP_AUTH_SHARED | \
600 CEPH_CAP_LINK_SHARED | \
601 CEPH_CAP_FILE_SHARED | \
602 CEPH_CAP_XATTR_SHARED)
603#define CEPH_STAT_CAP_INLINE_DATA (CEPH_CAP_FILE_SHARED | \
604 CEPH_CAP_FILE_RD)
605
606#define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
607 CEPH_CAP_LINK_SHARED | \
608 CEPH_CAP_XATTR_SHARED | \
609 CEPH_CAP_FILE_SHARED)
610#define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
611 CEPH_CAP_FILE_CACHE)
612
613#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
614 CEPH_CAP_LINK_EXCL | \
615 CEPH_CAP_XATTR_EXCL | \
616 CEPH_CAP_FILE_EXCL)
617#define CEPH_CAP_ANY_FILE_RD (CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | \
618 CEPH_CAP_FILE_SHARED)
619#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
620 CEPH_CAP_FILE_EXCL)
621#define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
622#define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
623 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
624 CEPH_CAP_PIN)
625
626#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
627 CEPH_LOCK_IXATTR)
628
629int ceph_caps_for_mode(int mode);
630
631enum {
632 CEPH_CAP_OP_GRANT, /* mds->client grant */
633 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
634 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
635 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
636 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
637 CEPH_CAP_OP_UPDATE, /* client->mds update */
638 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
639 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
640 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
641 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
642 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
643 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
644 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
645};
646
647extern const char *ceph_cap_op_name(int op);
648
649/*
650 * caps message, used for capability callbacks, acks, requests, etc.
651 */
652struct ceph_mds_caps {
653 __le32 op; /* CEPH_CAP_OP_* */
654 __le64 ino, realm;
655 __le64 cap_id;
656 __le32 seq, issue_seq;
657 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
658 __le32 migrate_seq;
659 __le64 snap_follows;
660 __le32 snap_trace_len;
661
662 /* authlock */
663 __le32 uid, gid, mode;
664
665 /* linklock */
666 __le32 nlink;
667
668 /* xattrlock */
669 __le32 xattr_len;
670 __le64 xattr_version;
671
672 /* filelock */
673 __le64 size, max_size, truncate_size;
674 __le32 truncate_seq;
675 struct ceph_timespec mtime, atime, ctime;
676 struct ceph_file_layout layout;
677 __le32 time_warp_seq;
678} __attribute__ ((packed));
679
680struct ceph_mds_cap_peer {
681 __le64 cap_id;
682 __le32 seq;
683 __le32 mseq;
684 __le32 mds;
685 __u8 flags;
686} __attribute__ ((packed));
687
688/* cap release msg head */
689struct ceph_mds_cap_release {
690 __le32 num; /* number of cap_items that follow */
691} __attribute__ ((packed));
692
693struct ceph_mds_cap_item {
694 __le64 ino;
695 __le64 cap_id;
696 __le32 migrate_seq, seq;
697} __attribute__ ((packed));
698
699#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
700#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
701#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
702#define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
703
704extern const char *ceph_lease_op_name(int o);
705
706/* lease msg header */
707struct ceph_mds_lease {
708 __u8 action; /* CEPH_MDS_LEASE_* */
709 __le16 mask; /* which lease */
710 __le64 ino;
711 __le64 first, last; /* snap range */
712 __le32 seq;
713 __le32 duration_ms; /* duration of renewal */
714} __attribute__ ((packed));
715/* followed by a __le32+string for dname */
716
717/* client reconnect */
718struct ceph_mds_cap_reconnect {
719 __le64 cap_id;
720 __le32 wanted;
721 __le32 issued;
722 __le64 snaprealm;
723 __le64 pathbase; /* base ino for our path to this ino */
724 __le32 flock_len; /* size of flock state blob, if any */
725} __attribute__ ((packed));
726/* followed by flock blob */
727
728struct ceph_mds_cap_reconnect_v1 {
729 __le64 cap_id;
730 __le32 wanted;
731 __le32 issued;
732 __le64 size;
733 struct ceph_timespec mtime, atime;
734 __le64 snaprealm;
735 __le64 pathbase; /* base ino for our path to this ino */
736} __attribute__ ((packed));
737
738struct ceph_mds_snaprealm_reconnect {
739 __le64 ino; /* snap realm base */
740 __le64 seq; /* snap seq for this snap realm */
741 __le64 parent; /* parent realm */
742} __attribute__ ((packed));
743
744/*
745 * snaps
746 */
747enum {
748 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
749 CEPH_SNAP_OP_CREATE,
750 CEPH_SNAP_OP_DESTROY,
751 CEPH_SNAP_OP_SPLIT,
752};
753
754extern const char *ceph_snap_op_name(int o);
755
756/* snap msg header */
757struct ceph_mds_snap_head {
758 __le32 op; /* CEPH_SNAP_OP_* */
759 __le64 split; /* ino to split off, if any */
760 __le32 num_split_inos; /* # inos belonging to new child realm */
761 __le32 num_split_realms; /* # child realms udner new child realm */
762 __le32 trace_len; /* size of snap trace blob */
763} __attribute__ ((packed));
764/* followed by split ino list, then split realms, then the trace blob */
765
766/*
767 * encode info about a snaprealm, as viewed by a client
768 */
769struct ceph_mds_snap_realm {
770 __le64 ino; /* ino */
771 __le64 created; /* snap: when created */
772 __le64 parent; /* ino: parent realm */
773 __le64 parent_since; /* snap: same parent since */
774 __le64 seq; /* snap: version */
775 __le32 num_snaps;
776 __le32 num_prior_parent_snaps;
777} __attribute__ ((packed));
778/* followed by my snap list, then prior parent snap list */
779
780#endif