Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 * legacy ceph_file_layoute
38 */
39struct ceph_file_layout_legacy {
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
56struct ceph_string;
57/*
58 * ceph_file_layout - describe data layout for a file/inode
59 */
60struct ceph_file_layout {
61 /* file -> object mapping */
62 u32 stripe_unit; /* stripe unit, in bytes */
63 u32 stripe_count; /* over this many objects */
64 u32 object_size; /* until objects are this big */
65 s64 pool_id; /* rados pool id */
66 struct ceph_string __rcu *pool_ns; /* rados pool namespace */
67};
68
69extern int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
70extern void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
71 struct ceph_file_layout_legacy *legacy);
72extern void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
73 struct ceph_file_layout_legacy *legacy);
74
75#define CEPH_MIN_STRIPE_UNIT 65536
76
77struct ceph_dir_layout {
78 __u8 dl_dir_hash; /* see ceph_hash.h for ids */
79 __u8 dl_unused1;
80 __u16 dl_unused2;
81 __u32 dl_unused3;
82} __attribute__ ((packed));
83
84/* crypto algorithms */
85#define CEPH_CRYPTO_NONE 0x0
86#define CEPH_CRYPTO_AES 0x1
87
88#define CEPH_AES_IV "cephsageyudagreg"
89
90/* security/authentication protocols */
91#define CEPH_AUTH_UNKNOWN 0x0
92#define CEPH_AUTH_NONE 0x1
93#define CEPH_AUTH_CEPHX 0x2
94
95#define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
96
97
98/*********************************************
99 * message layer
100 */
101
102/*
103 * message types
104 */
105
106/* misc */
107#define CEPH_MSG_SHUTDOWN 1
108#define CEPH_MSG_PING 2
109
110/* client <-> monitor */
111#define CEPH_MSG_MON_MAP 4
112#define CEPH_MSG_MON_GET_MAP 5
113#define CEPH_MSG_STATFS 13
114#define CEPH_MSG_STATFS_REPLY 14
115#define CEPH_MSG_MON_SUBSCRIBE 15
116#define CEPH_MSG_MON_SUBSCRIBE_ACK 16
117#define CEPH_MSG_AUTH 17
118#define CEPH_MSG_AUTH_REPLY 18
119#define CEPH_MSG_MON_GET_VERSION 19
120#define CEPH_MSG_MON_GET_VERSION_REPLY 20
121
122/* client <-> mds */
123#define CEPH_MSG_MDS_MAP 21
124#define CEPH_MSG_FS_MAP_USER 103
125
126#define CEPH_MSG_CLIENT_SESSION 22
127#define CEPH_MSG_CLIENT_RECONNECT 23
128
129#define CEPH_MSG_CLIENT_REQUEST 24
130#define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
131#define CEPH_MSG_CLIENT_REPLY 26
132#define CEPH_MSG_CLIENT_CAPS 0x310
133#define CEPH_MSG_CLIENT_LEASE 0x311
134#define CEPH_MSG_CLIENT_SNAP 0x312
135#define CEPH_MSG_CLIENT_CAPRELEASE 0x313
136
137/* pool ops */
138#define CEPH_MSG_POOLOP_REPLY 48
139#define CEPH_MSG_POOLOP 49
140
141
142/* osd */
143#define CEPH_MSG_OSD_MAP 41
144#define CEPH_MSG_OSD_OP 42
145#define CEPH_MSG_OSD_OPREPLY 43
146#define CEPH_MSG_WATCH_NOTIFY 44
147
148
149/* watch-notify operations */
150enum {
151 CEPH_WATCH_EVENT_NOTIFY = 1, /* notifying watcher */
152 CEPH_WATCH_EVENT_NOTIFY_COMPLETE = 2, /* notifier notified when done */
153 CEPH_WATCH_EVENT_DISCONNECT = 3, /* we were disconnected */
154};
155
156
157struct ceph_mon_request_header {
158 __le64 have_version;
159 __le16 session_mon;
160 __le64 session_mon_tid;
161} __attribute__ ((packed));
162
163struct ceph_mon_statfs {
164 struct ceph_mon_request_header monhdr;
165 struct ceph_fsid fsid;
166} __attribute__ ((packed));
167
168struct ceph_statfs {
169 __le64 kb, kb_used, kb_avail;
170 __le64 num_objects;
171} __attribute__ ((packed));
172
173struct ceph_mon_statfs_reply {
174 struct ceph_fsid fsid;
175 __le64 version;
176 struct ceph_statfs st;
177} __attribute__ ((packed));
178
179struct ceph_osd_getmap {
180 struct ceph_mon_request_header monhdr;
181 struct ceph_fsid fsid;
182 __le32 start;
183} __attribute__ ((packed));
184
185struct ceph_mds_getmap {
186 struct ceph_mon_request_header monhdr;
187 struct ceph_fsid fsid;
188} __attribute__ ((packed));
189
190struct ceph_client_mount {
191 struct ceph_mon_request_header monhdr;
192} __attribute__ ((packed));
193
194#define CEPH_SUBSCRIBE_ONETIME 1 /* i want only 1 update after have */
195
196struct ceph_mon_subscribe_item {
197 __le64 start;
198 __u8 flags;
199} __attribute__ ((packed));
200
201struct ceph_mon_subscribe_ack {
202 __le32 duration; /* seconds */
203 struct ceph_fsid fsid;
204} __attribute__ ((packed));
205
206#define CEPH_FS_CLUSTER_ID_NONE -1
207
208/*
209 * mdsmap flags
210 */
211#define CEPH_MDSMAP_DOWN (1<<0) /* cluster deliberately down */
212
213/*
214 * mds states
215 * > 0 -> in
216 * <= 0 -> out
217 */
218#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
219#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
220 empty log. */
221#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
222#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
223#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
224#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
225#define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
226#define CEPH_MDS_STATE_REPLAYONCE -9 /* up, replaying an active node's journal */
227
228#define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
229#define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
230 operations (import, rename, etc.) */
231#define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
232#define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
233#define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
234#define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
235#define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
236
237extern const char *ceph_mds_state_name(int s);
238
239
240/*
241 * metadata lock types.
242 * - these are bitmasks.. we can compose them
243 * - they also define the lock ordering by the MDS
244 * - a few of these are internal to the mds
245 */
246#define CEPH_LOCK_DVERSION 1
247#define CEPH_LOCK_DN 2
248#define CEPH_LOCK_ISNAP 16
249#define CEPH_LOCK_IVERSION 32 /* mds internal */
250#define CEPH_LOCK_IFILE 64
251#define CEPH_LOCK_IAUTH 128
252#define CEPH_LOCK_ILINK 256
253#define CEPH_LOCK_IDFT 512 /* dir frag tree */
254#define CEPH_LOCK_INEST 1024 /* mds internal */
255#define CEPH_LOCK_IXATTR 2048
256#define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
257#define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
258#define CEPH_LOCK_IPOLICY 16384 /* policy lock on dirs. MDS internal */
259
260/* client_session ops */
261enum {
262 CEPH_SESSION_REQUEST_OPEN,
263 CEPH_SESSION_OPEN,
264 CEPH_SESSION_REQUEST_CLOSE,
265 CEPH_SESSION_CLOSE,
266 CEPH_SESSION_REQUEST_RENEWCAPS,
267 CEPH_SESSION_RENEWCAPS,
268 CEPH_SESSION_STALE,
269 CEPH_SESSION_RECALL_STATE,
270 CEPH_SESSION_FLUSHMSG,
271 CEPH_SESSION_FLUSHMSG_ACK,
272 CEPH_SESSION_FORCE_RO,
273};
274
275extern const char *ceph_session_op_name(int op);
276
277struct ceph_mds_session_head {
278 __le32 op;
279 __le64 seq;
280 struct ceph_timespec stamp;
281 __le32 max_caps, max_leases;
282} __attribute__ ((packed));
283
284/* client_request */
285/*
286 * metadata ops.
287 * & 0x001000 -> write op
288 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
289 & & 0x100000 -> use weird ino/path trace
290 */
291#define CEPH_MDS_OP_WRITE 0x001000
292enum {
293 CEPH_MDS_OP_LOOKUP = 0x00100,
294 CEPH_MDS_OP_GETATTR = 0x00101,
295 CEPH_MDS_OP_LOOKUPHASH = 0x00102,
296 CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
297 CEPH_MDS_OP_LOOKUPINO = 0x00104,
298 CEPH_MDS_OP_LOOKUPNAME = 0x00105,
299
300 CEPH_MDS_OP_SETXATTR = 0x01105,
301 CEPH_MDS_OP_RMXATTR = 0x01106,
302 CEPH_MDS_OP_SETLAYOUT = 0x01107,
303 CEPH_MDS_OP_SETATTR = 0x01108,
304 CEPH_MDS_OP_SETFILELOCK= 0x01109,
305 CEPH_MDS_OP_GETFILELOCK= 0x00110,
306 CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
307
308 CEPH_MDS_OP_MKNOD = 0x01201,
309 CEPH_MDS_OP_LINK = 0x01202,
310 CEPH_MDS_OP_UNLINK = 0x01203,
311 CEPH_MDS_OP_RENAME = 0x01204,
312 CEPH_MDS_OP_MKDIR = 0x01220,
313 CEPH_MDS_OP_RMDIR = 0x01221,
314 CEPH_MDS_OP_SYMLINK = 0x01222,
315
316 CEPH_MDS_OP_CREATE = 0x01301,
317 CEPH_MDS_OP_OPEN = 0x00302,
318 CEPH_MDS_OP_READDIR = 0x00305,
319
320 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
321 CEPH_MDS_OP_MKSNAP = 0x01400,
322 CEPH_MDS_OP_RMSNAP = 0x01401,
323 CEPH_MDS_OP_LSSNAP = 0x00402,
324 CEPH_MDS_OP_RENAMESNAP = 0x01403,
325};
326
327extern const char *ceph_mds_op_name(int op);
328
329
330#define CEPH_SETATTR_MODE 1
331#define CEPH_SETATTR_UID 2
332#define CEPH_SETATTR_GID 4
333#define CEPH_SETATTR_MTIME 8
334#define CEPH_SETATTR_ATIME 16
335#define CEPH_SETATTR_SIZE 32
336#define CEPH_SETATTR_CTIME 64
337
338/*
339 * Ceph setxattr request flags.
340 */
341#define CEPH_XATTR_CREATE (1 << 0)
342#define CEPH_XATTR_REPLACE (1 << 1)
343#define CEPH_XATTR_REMOVE (1 << 31)
344
345/*
346 * readdir request flags;
347 */
348#define CEPH_READDIR_REPLY_BITFLAGS (1<<0)
349
350/*
351 * readdir reply flags.
352 */
353#define CEPH_READDIR_FRAG_END (1<<0)
354#define CEPH_READDIR_FRAG_COMPLETE (1<<8)
355#define CEPH_READDIR_HASH_ORDER (1<<9)
356
357union ceph_mds_request_args {
358 struct {
359 __le32 mask; /* CEPH_CAP_* */
360 } __attribute__ ((packed)) getattr;
361 struct {
362 __le32 mode;
363 __le32 uid;
364 __le32 gid;
365 struct ceph_timespec mtime;
366 struct ceph_timespec atime;
367 __le64 size, old_size; /* old_size needed by truncate */
368 __le32 mask; /* CEPH_SETATTR_* */
369 } __attribute__ ((packed)) setattr;
370 struct {
371 __le32 frag; /* which dir fragment */
372 __le32 max_entries; /* how many dentries to grab */
373 __le32 max_bytes;
374 __le16 flags;
375 } __attribute__ ((packed)) readdir;
376 struct {
377 __le32 mode;
378 __le32 rdev;
379 } __attribute__ ((packed)) mknod;
380 struct {
381 __le32 mode;
382 } __attribute__ ((packed)) mkdir;
383 struct {
384 __le32 flags;
385 __le32 mode;
386 __le32 stripe_unit; /* layout for newly created file */
387 __le32 stripe_count; /* ... */
388 __le32 object_size;
389 __le32 file_replication;
390 __le32 mask; /* CEPH_CAP_* */
391 __le32 old_size;
392 } __attribute__ ((packed)) open;
393 struct {
394 __le32 flags;
395 } __attribute__ ((packed)) setxattr;
396 struct {
397 struct ceph_file_layout_legacy layout;
398 } __attribute__ ((packed)) setlayout;
399 struct {
400 __u8 rule; /* currently fcntl or flock */
401 __u8 type; /* shared, exclusive, remove*/
402 __le64 owner; /* owner of the lock */
403 __le64 pid; /* process id requesting the lock */
404 __le64 start; /* initial location to lock */
405 __le64 length; /* num bytes to lock from start */
406 __u8 wait; /* will caller wait for lock to become available? */
407 } __attribute__ ((packed)) filelock_change;
408} __attribute__ ((packed));
409
410#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
411#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
412
413struct ceph_mds_request_head {
414 __le64 oldest_client_tid;
415 __le32 mdsmap_epoch; /* on client */
416 __le32 flags; /* CEPH_MDS_FLAG_* */
417 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
418 __le16 num_releases; /* # include cap/lease release records */
419 __le32 op; /* mds op code */
420 __le32 caller_uid, caller_gid;
421 __le64 ino; /* use this ino for openc, mkdir, mknod,
422 etc. (if replaying) */
423 union ceph_mds_request_args args;
424} __attribute__ ((packed));
425
426/* cap/lease release record */
427struct ceph_mds_request_release {
428 __le64 ino, cap_id; /* ino and unique cap id */
429 __le32 caps, wanted; /* new issued, wanted */
430 __le32 seq, issue_seq, mseq;
431 __le32 dname_seq; /* if releasing a dentry lease, a */
432 __le32 dname_len; /* string follows. */
433} __attribute__ ((packed));
434
435/* client reply */
436struct ceph_mds_reply_head {
437 __le32 op;
438 __le32 result;
439 __le32 mdsmap_epoch;
440 __u8 safe; /* true if committed to disk */
441 __u8 is_dentry, is_target; /* true if dentry, target inode records
442 are included with reply */
443} __attribute__ ((packed));
444
445/* one for each node split */
446struct ceph_frag_tree_split {
447 __le32 frag; /* this frag splits... */
448 __le32 by; /* ...by this many bits */
449} __attribute__ ((packed));
450
451struct ceph_frag_tree_head {
452 __le32 nsplits; /* num ceph_frag_tree_split records */
453 struct ceph_frag_tree_split splits[];
454} __attribute__ ((packed));
455
456/* capability issue, for bundling with mds reply */
457struct ceph_mds_reply_cap {
458 __le32 caps, wanted; /* caps issued, wanted */
459 __le64 cap_id;
460 __le32 seq, mseq;
461 __le64 realm; /* snap realm */
462 __u8 flags; /* CEPH_CAP_FLAG_* */
463} __attribute__ ((packed));
464
465#define CEPH_CAP_FLAG_AUTH (1 << 0) /* cap is issued by auth mds */
466#define CEPH_CAP_FLAG_RELEASE (1 << 1) /* release the cap */
467
468/* inode record, for bundling with mds reply */
469struct ceph_mds_reply_inode {
470 __le64 ino;
471 __le64 snapid;
472 __le32 rdev;
473 __le64 version; /* inode version */
474 __le64 xattr_version; /* version for xattr blob */
475 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
476 struct ceph_file_layout_legacy layout;
477 struct ceph_timespec ctime, mtime, atime;
478 __le32 time_warp_seq;
479 __le64 size, max_size, truncate_size;
480 __le32 truncate_seq;
481 __le32 mode, uid, gid;
482 __le32 nlink;
483 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
484 struct ceph_timespec rctime;
485 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
486} __attribute__ ((packed));
487/* followed by frag array, symlink string, dir layout, xattr blob */
488
489/* reply_lease follows dname, and reply_inode */
490struct ceph_mds_reply_lease {
491 __le16 mask; /* lease type(s) */
492 __le32 duration_ms; /* lease duration */
493 __le32 seq;
494} __attribute__ ((packed));
495
496struct ceph_mds_reply_dirfrag {
497 __le32 frag; /* fragment */
498 __le32 auth; /* auth mds, if this is a delegation point */
499 __le32 ndist; /* number of mds' this is replicated on */
500 __le32 dist[];
501} __attribute__ ((packed));
502
503#define CEPH_LOCK_FCNTL 1
504#define CEPH_LOCK_FLOCK 2
505#define CEPH_LOCK_FCNTL_INTR 3
506#define CEPH_LOCK_FLOCK_INTR 4
507
508
509#define CEPH_LOCK_SHARED 1
510#define CEPH_LOCK_EXCL 2
511#define CEPH_LOCK_UNLOCK 4
512
513struct ceph_filelock {
514 __le64 start;/* file offset to start lock at */
515 __le64 length; /* num bytes to lock; 0 for all following start */
516 __le64 client; /* which client holds the lock */
517 __le64 owner; /* owner the lock */
518 __le64 pid; /* process id holding the lock on the client */
519 __u8 type; /* shared lock, exclusive lock, or unlock */
520} __attribute__ ((packed));
521
522
523/* file access modes */
524#define CEPH_FILE_MODE_PIN 0
525#define CEPH_FILE_MODE_RD 1
526#define CEPH_FILE_MODE_WR 2
527#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
528#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
529#define CEPH_FILE_MODE_BITS 4
530
531int ceph_flags_to_mode(int flags);
532
533#define CEPH_INLINE_NONE ((__u64)-1)
534
535/* capability bits */
536#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
537
538/* generic cap bits */
539#define CEPH_CAP_GSHARED 1 /* client can reads */
540#define CEPH_CAP_GEXCL 2 /* client can read and update */
541#define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
542#define CEPH_CAP_GRD 8 /* (file) client can read */
543#define CEPH_CAP_GWR 16 /* (file) client can write */
544#define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
545#define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
546#define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
547
548#define CEPH_CAP_SIMPLE_BITS 2
549#define CEPH_CAP_FILE_BITS 8
550
551/* per-lock shift */
552#define CEPH_CAP_SAUTH 2
553#define CEPH_CAP_SLINK 4
554#define CEPH_CAP_SXATTR 6
555#define CEPH_CAP_SFILE 8
556#define CEPH_CAP_SFLOCK 20
557
558#define CEPH_CAP_BITS 22
559
560/* composed values */
561#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
562#define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
563#define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
564#define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
565#define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
566#define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
567#define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
568#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
569#define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
570#define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
571#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
572#define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
573#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
574#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
575#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
576#define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
577#define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
578
579
580/* cap masks (for getattr) */
581#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
582#define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
583#define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
584#define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
585#define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
586#define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
587#define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
588#define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
589#define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
590#define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
591#define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
592#define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
593#define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
594 CEPH_CAP_AUTH_SHARED | \
595 CEPH_CAP_LINK_SHARED | \
596 CEPH_CAP_FILE_SHARED | \
597 CEPH_CAP_XATTR_SHARED)
598#define CEPH_STAT_CAP_INLINE_DATA (CEPH_CAP_FILE_SHARED | \
599 CEPH_CAP_FILE_RD)
600
601#define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
602 CEPH_CAP_LINK_SHARED | \
603 CEPH_CAP_XATTR_SHARED | \
604 CEPH_CAP_FILE_SHARED)
605#define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
606 CEPH_CAP_FILE_CACHE)
607
608#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
609 CEPH_CAP_LINK_EXCL | \
610 CEPH_CAP_XATTR_EXCL | \
611 CEPH_CAP_FILE_EXCL)
612#define CEPH_CAP_ANY_FILE_RD (CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | \
613 CEPH_CAP_FILE_SHARED)
614#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
615 CEPH_CAP_FILE_EXCL)
616#define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
617#define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
618 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
619 CEPH_CAP_PIN)
620
621#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
622 CEPH_LOCK_IXATTR)
623
624int ceph_caps_for_mode(int mode);
625
626enum {
627 CEPH_CAP_OP_GRANT, /* mds->client grant */
628 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
629 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
630 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
631 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
632 CEPH_CAP_OP_UPDATE, /* client->mds update */
633 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
634 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
635 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
636 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
637 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
638 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
639 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
640};
641
642extern const char *ceph_cap_op_name(int op);
643
644/*
645 * caps message, used for capability callbacks, acks, requests, etc.
646 */
647struct ceph_mds_caps {
648 __le32 op; /* CEPH_CAP_OP_* */
649 __le64 ino, realm;
650 __le64 cap_id;
651 __le32 seq, issue_seq;
652 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
653 __le32 migrate_seq;
654 __le64 snap_follows;
655 __le32 snap_trace_len;
656
657 /* authlock */
658 __le32 uid, gid, mode;
659
660 /* linklock */
661 __le32 nlink;
662
663 /* xattrlock */
664 __le32 xattr_len;
665 __le64 xattr_version;
666
667 /* filelock */
668 __le64 size, max_size, truncate_size;
669 __le32 truncate_seq;
670 struct ceph_timespec mtime, atime, ctime;
671 struct ceph_file_layout_legacy layout;
672 __le32 time_warp_seq;
673} __attribute__ ((packed));
674
675struct ceph_mds_cap_peer {
676 __le64 cap_id;
677 __le32 seq;
678 __le32 mseq;
679 __le32 mds;
680 __u8 flags;
681} __attribute__ ((packed));
682
683/* cap release msg head */
684struct ceph_mds_cap_release {
685 __le32 num; /* number of cap_items that follow */
686} __attribute__ ((packed));
687
688struct ceph_mds_cap_item {
689 __le64 ino;
690 __le64 cap_id;
691 __le32 migrate_seq, seq;
692} __attribute__ ((packed));
693
694#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
695#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
696#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
697#define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
698
699extern const char *ceph_lease_op_name(int o);
700
701/* lease msg header */
702struct ceph_mds_lease {
703 __u8 action; /* CEPH_MDS_LEASE_* */
704 __le16 mask; /* which lease */
705 __le64 ino;
706 __le64 first, last; /* snap range */
707 __le32 seq;
708 __le32 duration_ms; /* duration of renewal */
709} __attribute__ ((packed));
710/* followed by a __le32+string for dname */
711
712/* client reconnect */
713struct ceph_mds_cap_reconnect {
714 __le64 cap_id;
715 __le32 wanted;
716 __le32 issued;
717 __le64 snaprealm;
718 __le64 pathbase; /* base ino for our path to this ino */
719 __le32 flock_len; /* size of flock state blob, if any */
720} __attribute__ ((packed));
721/* followed by flock blob */
722
723struct ceph_mds_cap_reconnect_v1 {
724 __le64 cap_id;
725 __le32 wanted;
726 __le32 issued;
727 __le64 size;
728 struct ceph_timespec mtime, atime;
729 __le64 snaprealm;
730 __le64 pathbase; /* base ino for our path to this ino */
731} __attribute__ ((packed));
732
733struct ceph_mds_snaprealm_reconnect {
734 __le64 ino; /* snap realm base */
735 __le64 seq; /* snap seq for this snap realm */
736 __le64 parent; /* parent realm */
737} __attribute__ ((packed));
738
739/*
740 * snaps
741 */
742enum {
743 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
744 CEPH_SNAP_OP_CREATE,
745 CEPH_SNAP_OP_DESTROY,
746 CEPH_SNAP_OP_SPLIT,
747};
748
749extern const char *ceph_snap_op_name(int o);
750
751/* snap msg header */
752struct ceph_mds_snap_head {
753 __le32 op; /* CEPH_SNAP_OP_* */
754 __le64 split; /* ino to split off, if any */
755 __le32 num_split_inos; /* # inos belonging to new child realm */
756 __le32 num_split_realms; /* # child realms udner new child realm */
757 __le32 trace_len; /* size of snap trace blob */
758} __attribute__ ((packed));
759/* followed by split ino list, then split realms, then the trace blob */
760
761/*
762 * encode info about a snaprealm, as viewed by a client
763 */
764struct ceph_mds_snap_realm {
765 __le64 ino; /* ino */
766 __le64 created; /* snap: when created */
767 __le64 parent; /* ino: parent realm */
768 __le64 parent_since; /* snap: same parent since */
769 __le64 seq; /* snap: version */
770 __le32 num_snaps;
771 __le32 num_prior_parent_snaps;
772} __attribute__ ((packed));
773/* followed by my snap list, then prior parent snap list */
774
775#endif