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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * ceph_fs.h - Ceph constants and data types to share between kernel and
4 * user space.
5 *
6 * Most types in this file are defined as little-endian, and are
7 * primarily intended to describe data structures that pass over the
8 * wire or that are stored on disk.
9 *
10 * LGPL2
11 */
12
13#ifndef CEPH_FS_H
14#define CEPH_FS_H
15
16#include <linux/ceph/msgr.h>
17#include <linux/ceph/rados.h>
18
19/*
20 * subprotocol versions. when specific messages types or high-level
21 * protocols change, bump the affected components. we keep rev
22 * internal cluster protocols separately from the public,
23 * client-facing protocol.
24 */
25#define CEPH_OSDC_PROTOCOL 24 /* server/client */
26#define CEPH_MDSC_PROTOCOL 32 /* server/client */
27#define CEPH_MONC_PROTOCOL 15 /* server/client */
28
29
30#define CEPH_INO_ROOT 1
31#define CEPH_INO_CEPH 2 /* hidden .ceph dir */
32#define CEPH_INO_DOTDOT 3 /* used by ceph fuse for parent (..) */
33
34/* arbitrary limit on max # of monitors (cluster of 3 is typical) */
35#define CEPH_MAX_MON 31
36
37/*
38 * legacy ceph_file_layoute
39 */
40struct ceph_file_layout_legacy {
41 /* file -> object mapping */
42 __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
43 of page size. */
44 __le32 fl_stripe_count; /* over this many objects */
45 __le32 fl_object_size; /* until objects are this big, then move to
46 new objects */
47 __le32 fl_cas_hash; /* UNUSED. 0 = none; 1 = sha256 */
48
49 /* pg -> disk layout */
50 __le32 fl_object_stripe_unit; /* UNUSED. for per-object parity, if any */
51
52 /* object -> pg layout */
53 __le32 fl_unused; /* unused; used to be preferred primary for pg (-1 for none) */
54 __le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
55} __attribute__ ((packed));
56
57struct ceph_string;
58/*
59 * ceph_file_layout - describe data layout for a file/inode
60 */
61struct ceph_file_layout {
62 /* file -> object mapping */
63 u32 stripe_unit; /* stripe unit, in bytes */
64 u32 stripe_count; /* over this many objects */
65 u32 object_size; /* until objects are this big */
66 s64 pool_id; /* rados pool id */
67 struct ceph_string __rcu *pool_ns; /* rados pool namespace */
68};
69
70extern int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
71extern void ceph_file_layout_from_legacy(struct ceph_file_layout *fl,
72 struct ceph_file_layout_legacy *legacy);
73extern void ceph_file_layout_to_legacy(struct ceph_file_layout *fl,
74 struct ceph_file_layout_legacy *legacy);
75
76#define CEPH_MIN_STRIPE_UNIT 65536
77
78struct ceph_dir_layout {
79 __u8 dl_dir_hash; /* see ceph_hash.h for ids */
80 __u8 dl_unused1;
81 __u16 dl_unused2;
82 __u32 dl_unused3;
83} __attribute__ ((packed));
84
85/* crypto algorithms */
86#define CEPH_CRYPTO_NONE 0x0
87#define CEPH_CRYPTO_AES 0x1
88
89#define CEPH_AES_IV "cephsageyudagreg"
90
91/* security/authentication protocols */
92#define CEPH_AUTH_UNKNOWN 0x0
93#define CEPH_AUTH_NONE 0x1
94#define CEPH_AUTH_CEPHX 0x2
95
96#define CEPH_AUTH_MODE_NONE 0
97#define CEPH_AUTH_MODE_AUTHORIZER 1
98#define CEPH_AUTH_MODE_MON 10
99
100/* msgr2 protocol modes */
101#define CEPH_CON_MODE_UNKNOWN 0x0
102#define CEPH_CON_MODE_CRC 0x1
103#define CEPH_CON_MODE_SECURE 0x2
104
105#define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
106
107const char *ceph_auth_proto_name(int proto);
108const char *ceph_con_mode_name(int mode);
109
110/*********************************************
111 * message layer
112 */
113
114/*
115 * message types
116 */
117
118/* misc */
119#define CEPH_MSG_SHUTDOWN 1
120#define CEPH_MSG_PING 2
121
122/* client <-> monitor */
123#define CEPH_MSG_MON_MAP 4
124#define CEPH_MSG_MON_GET_MAP 5
125#define CEPH_MSG_STATFS 13
126#define CEPH_MSG_STATFS_REPLY 14
127#define CEPH_MSG_MON_SUBSCRIBE 15
128#define CEPH_MSG_MON_SUBSCRIBE_ACK 16
129#define CEPH_MSG_AUTH 17
130#define CEPH_MSG_AUTH_REPLY 18
131#define CEPH_MSG_MON_GET_VERSION 19
132#define CEPH_MSG_MON_GET_VERSION_REPLY 20
133
134/* client <-> mds */
135#define CEPH_MSG_MDS_MAP 21
136#define CEPH_MSG_FS_MAP_USER 103
137
138#define CEPH_MSG_CLIENT_SESSION 22
139#define CEPH_MSG_CLIENT_RECONNECT 23
140
141#define CEPH_MSG_CLIENT_REQUEST 24
142#define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
143#define CEPH_MSG_CLIENT_REPLY 26
144#define CEPH_MSG_CLIENT_METRICS 29
145#define CEPH_MSG_CLIENT_CAPS 0x310
146#define CEPH_MSG_CLIENT_LEASE 0x311
147#define CEPH_MSG_CLIENT_SNAP 0x312
148#define CEPH_MSG_CLIENT_CAPRELEASE 0x313
149#define CEPH_MSG_CLIENT_QUOTA 0x314
150
151/* pool ops */
152#define CEPH_MSG_POOLOP_REPLY 48
153#define CEPH_MSG_POOLOP 49
154
155/* mon commands */
156#define CEPH_MSG_MON_COMMAND 50
157#define CEPH_MSG_MON_COMMAND_ACK 51
158
159/* osd */
160#define CEPH_MSG_OSD_MAP 41
161#define CEPH_MSG_OSD_OP 42
162#define CEPH_MSG_OSD_OPREPLY 43
163#define CEPH_MSG_WATCH_NOTIFY 44
164#define CEPH_MSG_OSD_BACKOFF 61
165
166
167/* watch-notify operations */
168enum {
169 CEPH_WATCH_EVENT_NOTIFY = 1, /* notifying watcher */
170 CEPH_WATCH_EVENT_NOTIFY_COMPLETE = 2, /* notifier notified when done */
171 CEPH_WATCH_EVENT_DISCONNECT = 3, /* we were disconnected */
172};
173
174
175struct ceph_mon_request_header {
176 __le64 have_version;
177 __le16 session_mon;
178 __le64 session_mon_tid;
179} __attribute__ ((packed));
180
181struct ceph_mon_statfs {
182 struct ceph_mon_request_header monhdr;
183 struct ceph_fsid fsid;
184 __u8 contains_data_pool;
185 __le64 data_pool;
186} __attribute__ ((packed));
187
188struct ceph_statfs {
189 __le64 kb, kb_used, kb_avail;
190 __le64 num_objects;
191} __attribute__ ((packed));
192
193struct ceph_mon_statfs_reply {
194 struct ceph_fsid fsid;
195 __le64 version;
196 struct ceph_statfs st;
197} __attribute__ ((packed));
198
199struct ceph_mon_command {
200 struct ceph_mon_request_header monhdr;
201 struct ceph_fsid fsid;
202 __le32 num_strs; /* always 1 */
203 __le32 str_len;
204 char str[];
205} __attribute__ ((packed));
206
207struct ceph_osd_getmap {
208 struct ceph_mon_request_header monhdr;
209 struct ceph_fsid fsid;
210 __le32 start;
211} __attribute__ ((packed));
212
213struct ceph_mds_getmap {
214 struct ceph_mon_request_header monhdr;
215 struct ceph_fsid fsid;
216} __attribute__ ((packed));
217
218struct ceph_client_mount {
219 struct ceph_mon_request_header monhdr;
220} __attribute__ ((packed));
221
222#define CEPH_SUBSCRIBE_ONETIME 1 /* i want only 1 update after have */
223
224struct ceph_mon_subscribe_item {
225 __le64 start;
226 __u8 flags;
227} __attribute__ ((packed));
228
229struct ceph_mon_subscribe_ack {
230 __le32 duration; /* seconds */
231 struct ceph_fsid fsid;
232} __attribute__ ((packed));
233
234#define CEPH_FS_CLUSTER_ID_NONE -1
235
236/*
237 * mdsmap flags
238 */
239#define CEPH_MDSMAP_DOWN (1<<0) /* cluster deliberately down */
240
241/*
242 * mds states
243 * > 0 -> in
244 * <= 0 -> out
245 */
246#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
247#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
248 empty log. */
249#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
250#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
251#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
252#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
253#define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
254#define CEPH_MDS_STATE_REPLAYONCE -9 /* up, replaying an active node's journal */
255
256#define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
257#define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
258 operations (import, rename, etc.) */
259#define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
260#define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
261#define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
262#define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
263#define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
264
265extern const char *ceph_mds_state_name(int s);
266
267
268/*
269 * metadata lock types.
270 * - these are bitmasks.. we can compose them
271 * - they also define the lock ordering by the MDS
272 * - a few of these are internal to the mds
273 */
274#define CEPH_LOCK_DVERSION 1
275#define CEPH_LOCK_DN 2
276#define CEPH_LOCK_ISNAP 16
277#define CEPH_LOCK_IVERSION 32 /* mds internal */
278#define CEPH_LOCK_IFILE 64
279#define CEPH_LOCK_IAUTH 128
280#define CEPH_LOCK_ILINK 256
281#define CEPH_LOCK_IDFT 512 /* dir frag tree */
282#define CEPH_LOCK_INEST 1024 /* mds internal */
283#define CEPH_LOCK_IXATTR 2048
284#define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
285#define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
286#define CEPH_LOCK_IPOLICY 16384 /* policy lock on dirs. MDS internal */
287
288/* client_session ops */
289enum {
290 CEPH_SESSION_REQUEST_OPEN,
291 CEPH_SESSION_OPEN,
292 CEPH_SESSION_REQUEST_CLOSE,
293 CEPH_SESSION_CLOSE,
294 CEPH_SESSION_REQUEST_RENEWCAPS,
295 CEPH_SESSION_RENEWCAPS,
296 CEPH_SESSION_STALE,
297 CEPH_SESSION_RECALL_STATE,
298 CEPH_SESSION_FLUSHMSG,
299 CEPH_SESSION_FLUSHMSG_ACK,
300 CEPH_SESSION_FORCE_RO,
301 CEPH_SESSION_REJECT,
302 CEPH_SESSION_REQUEST_FLUSH_MDLOG,
303};
304
305extern const char *ceph_session_op_name(int op);
306
307struct ceph_mds_session_head {
308 __le32 op;
309 __le64 seq;
310 struct ceph_timespec stamp;
311 __le32 max_caps, max_leases;
312} __attribute__ ((packed));
313
314/* client_request */
315/*
316 * metadata ops.
317 * & 0x001000 -> write op
318 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
319 & & 0x100000 -> use weird ino/path trace
320 */
321#define CEPH_MDS_OP_WRITE 0x001000
322enum {
323 CEPH_MDS_OP_LOOKUP = 0x00100,
324 CEPH_MDS_OP_GETATTR = 0x00101,
325 CEPH_MDS_OP_LOOKUPHASH = 0x00102,
326 CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
327 CEPH_MDS_OP_LOOKUPINO = 0x00104,
328 CEPH_MDS_OP_LOOKUPNAME = 0x00105,
329
330 CEPH_MDS_OP_SETXATTR = 0x01105,
331 CEPH_MDS_OP_RMXATTR = 0x01106,
332 CEPH_MDS_OP_SETLAYOUT = 0x01107,
333 CEPH_MDS_OP_SETATTR = 0x01108,
334 CEPH_MDS_OP_SETFILELOCK= 0x01109,
335 CEPH_MDS_OP_GETFILELOCK= 0x00110,
336 CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
337
338 CEPH_MDS_OP_MKNOD = 0x01201,
339 CEPH_MDS_OP_LINK = 0x01202,
340 CEPH_MDS_OP_UNLINK = 0x01203,
341 CEPH_MDS_OP_RENAME = 0x01204,
342 CEPH_MDS_OP_MKDIR = 0x01220,
343 CEPH_MDS_OP_RMDIR = 0x01221,
344 CEPH_MDS_OP_SYMLINK = 0x01222,
345
346 CEPH_MDS_OP_CREATE = 0x01301,
347 CEPH_MDS_OP_OPEN = 0x00302,
348 CEPH_MDS_OP_READDIR = 0x00305,
349
350 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
351 CEPH_MDS_OP_MKSNAP = 0x01400,
352 CEPH_MDS_OP_RMSNAP = 0x01401,
353 CEPH_MDS_OP_LSSNAP = 0x00402,
354 CEPH_MDS_OP_RENAMESNAP = 0x01403,
355};
356
357extern const char *ceph_mds_op_name(int op);
358
359
360#define CEPH_SETATTR_MODE 1
361#define CEPH_SETATTR_UID 2
362#define CEPH_SETATTR_GID 4
363#define CEPH_SETATTR_MTIME 8
364#define CEPH_SETATTR_ATIME 16
365#define CEPH_SETATTR_SIZE 32
366#define CEPH_SETATTR_CTIME 64
367
368/*
369 * Ceph setxattr request flags.
370 */
371#define CEPH_XATTR_CREATE (1 << 0)
372#define CEPH_XATTR_REPLACE (1 << 1)
373#define CEPH_XATTR_REMOVE (1 << 31)
374
375/*
376 * readdir request flags;
377 */
378#define CEPH_READDIR_REPLY_BITFLAGS (1<<0)
379
380/*
381 * readdir reply flags.
382 */
383#define CEPH_READDIR_FRAG_END (1<<0)
384#define CEPH_READDIR_FRAG_COMPLETE (1<<8)
385#define CEPH_READDIR_HASH_ORDER (1<<9)
386#define CEPH_READDIR_OFFSET_HASH (1<<10)
387
388/*
389 * open request flags
390 */
391#define CEPH_O_RDONLY 00000000
392#define CEPH_O_WRONLY 00000001
393#define CEPH_O_RDWR 00000002
394#define CEPH_O_CREAT 00000100
395#define CEPH_O_EXCL 00000200
396#define CEPH_O_TRUNC 00001000
397#define CEPH_O_DIRECTORY 00200000
398#define CEPH_O_NOFOLLOW 00400000
399
400union ceph_mds_request_args {
401 struct {
402 __le32 mask; /* CEPH_CAP_* */
403 } __attribute__ ((packed)) getattr;
404 struct {
405 __le32 mode;
406 __le32 uid;
407 __le32 gid;
408 struct ceph_timespec mtime;
409 struct ceph_timespec atime;
410 __le64 size, old_size; /* old_size needed by truncate */
411 __le32 mask; /* CEPH_SETATTR_* */
412 } __attribute__ ((packed)) setattr;
413 struct {
414 __le32 frag; /* which dir fragment */
415 __le32 max_entries; /* how many dentries to grab */
416 __le32 max_bytes;
417 __le16 flags;
418 __le32 offset_hash;
419 } __attribute__ ((packed)) readdir;
420 struct {
421 __le32 mode;
422 __le32 rdev;
423 } __attribute__ ((packed)) mknod;
424 struct {
425 __le32 mode;
426 } __attribute__ ((packed)) mkdir;
427 struct {
428 __le32 flags;
429 __le32 mode;
430 __le32 stripe_unit; /* layout for newly created file */
431 __le32 stripe_count; /* ... */
432 __le32 object_size;
433 __le32 file_replication;
434 __le32 mask; /* CEPH_CAP_* */
435 __le32 old_size;
436 } __attribute__ ((packed)) open;
437 struct {
438 __le32 flags;
439 __le32 osdmap_epoch; /* used for setting file/dir layouts */
440 } __attribute__ ((packed)) setxattr;
441 struct {
442 struct ceph_file_layout_legacy layout;
443 } __attribute__ ((packed)) setlayout;
444 struct {
445 __u8 rule; /* currently fcntl or flock */
446 __u8 type; /* shared, exclusive, remove*/
447 __le64 owner; /* owner of the lock */
448 __le64 pid; /* process id requesting the lock */
449 __le64 start; /* initial location to lock */
450 __le64 length; /* num bytes to lock from start */
451 __u8 wait; /* will caller wait for lock to become available? */
452 } __attribute__ ((packed)) filelock_change;
453 struct {
454 __le32 mask; /* CEPH_CAP_* */
455 __le64 snapid;
456 __le64 parent;
457 __le32 hash;
458 } __attribute__ ((packed)) lookupino;
459} __attribute__ ((packed));
460
461union ceph_mds_request_args_ext {
462 union ceph_mds_request_args old;
463 struct {
464 __le32 mode;
465 __le32 uid;
466 __le32 gid;
467 struct ceph_timespec mtime;
468 struct ceph_timespec atime;
469 __le64 size, old_size; /* old_size needed by truncate */
470 __le32 mask; /* CEPH_SETATTR_* */
471 struct ceph_timespec btime;
472 } __attribute__ ((packed)) setattr_ext;
473};
474
475#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
476#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
477#define CEPH_MDS_FLAG_ASYNC 4 /* request is asynchronous */
478
479struct ceph_mds_request_head_old {
480 __le64 oldest_client_tid;
481 __le32 mdsmap_epoch; /* on client */
482 __le32 flags; /* CEPH_MDS_FLAG_* */
483 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
484 __le16 num_releases; /* # include cap/lease release records */
485 __le32 op; /* mds op code */
486 __le32 caller_uid, caller_gid;
487 __le64 ino; /* use this ino for openc, mkdir, mknod,
488 etc. (if replaying) */
489 union ceph_mds_request_args args;
490} __attribute__ ((packed));
491
492#define CEPH_MDS_REQUEST_HEAD_VERSION 1
493
494struct ceph_mds_request_head {
495 __le16 version; /* struct version */
496 __le64 oldest_client_tid;
497 __le32 mdsmap_epoch; /* on client */
498 __le32 flags; /* CEPH_MDS_FLAG_* */
499 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
500 __le16 num_releases; /* # include cap/lease release records */
501 __le32 op; /* mds op code */
502 __le32 caller_uid, caller_gid;
503 __le64 ino; /* use this ino for openc, mkdir, mknod,
504 etc. (if replaying) */
505 union ceph_mds_request_args_ext args;
506} __attribute__ ((packed));
507
508/* cap/lease release record */
509struct ceph_mds_request_release {
510 __le64 ino, cap_id; /* ino and unique cap id */
511 __le32 caps, wanted; /* new issued, wanted */
512 __le32 seq, issue_seq, mseq;
513 __le32 dname_seq; /* if releasing a dentry lease, a */
514 __le32 dname_len; /* string follows. */
515} __attribute__ ((packed));
516
517/* client reply */
518struct ceph_mds_reply_head {
519 __le32 op;
520 __le32 result;
521 __le32 mdsmap_epoch;
522 __u8 safe; /* true if committed to disk */
523 __u8 is_dentry, is_target; /* true if dentry, target inode records
524 are included with reply */
525} __attribute__ ((packed));
526
527/* one for each node split */
528struct ceph_frag_tree_split {
529 __le32 frag; /* this frag splits... */
530 __le32 by; /* ...by this many bits */
531} __attribute__ ((packed));
532
533struct ceph_frag_tree_head {
534 __le32 nsplits; /* num ceph_frag_tree_split records */
535 struct ceph_frag_tree_split splits[];
536} __attribute__ ((packed));
537
538/* capability issue, for bundling with mds reply */
539struct ceph_mds_reply_cap {
540 __le32 caps, wanted; /* caps issued, wanted */
541 __le64 cap_id;
542 __le32 seq, mseq;
543 __le64 realm; /* snap realm */
544 __u8 flags; /* CEPH_CAP_FLAG_* */
545} __attribute__ ((packed));
546
547#define CEPH_CAP_FLAG_AUTH (1 << 0) /* cap is issued by auth mds */
548#define CEPH_CAP_FLAG_RELEASE (1 << 1) /* release the cap */
549
550/* inode record, for bundling with mds reply */
551struct ceph_mds_reply_inode {
552 __le64 ino;
553 __le64 snapid;
554 __le32 rdev;
555 __le64 version; /* inode version */
556 __le64 xattr_version; /* version for xattr blob */
557 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
558 struct ceph_file_layout_legacy layout;
559 struct ceph_timespec ctime, mtime, atime;
560 __le32 time_warp_seq;
561 __le64 size, max_size, truncate_size;
562 __le32 truncate_seq;
563 __le32 mode, uid, gid;
564 __le32 nlink;
565 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
566 struct ceph_timespec rctime;
567 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
568} __attribute__ ((packed));
569/* followed by frag array, symlink string, dir layout, xattr blob */
570
571/* reply_lease follows dname, and reply_inode */
572struct ceph_mds_reply_lease {
573 __le16 mask; /* lease type(s) */
574 __le32 duration_ms; /* lease duration */
575 __le32 seq;
576} __attribute__ ((packed));
577
578#define CEPH_LEASE_VALID (1 | 2) /* old and new bit values */
579#define CEPH_LEASE_PRIMARY_LINK 4 /* primary linkage */
580
581struct ceph_mds_reply_dirfrag {
582 __le32 frag; /* fragment */
583 __le32 auth; /* auth mds, if this is a delegation point */
584 __le32 ndist; /* number of mds' this is replicated on */
585 __le32 dist[];
586} __attribute__ ((packed));
587
588#define CEPH_LOCK_FCNTL 1
589#define CEPH_LOCK_FLOCK 2
590#define CEPH_LOCK_FCNTL_INTR 3
591#define CEPH_LOCK_FLOCK_INTR 4
592
593
594#define CEPH_LOCK_SHARED 1
595#define CEPH_LOCK_EXCL 2
596#define CEPH_LOCK_UNLOCK 4
597
598struct ceph_filelock {
599 __le64 start;/* file offset to start lock at */
600 __le64 length; /* num bytes to lock; 0 for all following start */
601 __le64 client; /* which client holds the lock */
602 __le64 owner; /* owner the lock */
603 __le64 pid; /* process id holding the lock on the client */
604 __u8 type; /* shared lock, exclusive lock, or unlock */
605} __attribute__ ((packed));
606
607
608/* file access modes */
609#define CEPH_FILE_MODE_PIN 0
610#define CEPH_FILE_MODE_RD 1
611#define CEPH_FILE_MODE_WR 2
612#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
613#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
614#define CEPH_FILE_MODE_BITS 4
615#define CEPH_FILE_MODE_MASK ((1 << CEPH_FILE_MODE_BITS) - 1)
616
617int ceph_flags_to_mode(int flags);
618
619#define CEPH_INLINE_NONE ((__u64)-1)
620
621/* capability bits */
622#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
623
624/* generic cap bits */
625#define CEPH_CAP_GSHARED 1 /* client can reads */
626#define CEPH_CAP_GEXCL 2 /* client can read and update */
627#define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
628#define CEPH_CAP_GRD 8 /* (file) client can read */
629#define CEPH_CAP_GWR 16 /* (file) client can write */
630#define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
631#define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
632#define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
633
634#define CEPH_CAP_SIMPLE_BITS 2
635#define CEPH_CAP_FILE_BITS 8
636
637/* per-lock shift */
638#define CEPH_CAP_SAUTH 2
639#define CEPH_CAP_SLINK 4
640#define CEPH_CAP_SXATTR 6
641#define CEPH_CAP_SFILE 8
642#define CEPH_CAP_SFLOCK 20
643
644#define CEPH_CAP_BITS 22
645
646/* composed values */
647#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
648#define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
649#define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
650#define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
651#define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
652#define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
653#define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
654#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
655#define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
656#define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
657#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
658#define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
659#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
660#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
661#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
662#define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
663#define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
664
665
666/* cap masks (for getattr) */
667#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
668#define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
669#define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
670#define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
671#define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
672#define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
673#define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
674#define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
675#define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
676#define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
677#define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
678#define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
679#define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
680 CEPH_CAP_AUTH_SHARED | \
681 CEPH_CAP_LINK_SHARED | \
682 CEPH_CAP_FILE_SHARED | \
683 CEPH_CAP_XATTR_SHARED)
684#define CEPH_STAT_CAP_INLINE_DATA (CEPH_CAP_FILE_SHARED | \
685 CEPH_CAP_FILE_RD)
686#define CEPH_STAT_RSTAT CEPH_CAP_FILE_WREXTEND
687
688#define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
689 CEPH_CAP_LINK_SHARED | \
690 CEPH_CAP_XATTR_SHARED | \
691 CEPH_CAP_FILE_SHARED)
692#define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
693 CEPH_CAP_FILE_CACHE)
694
695#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
696 CEPH_CAP_LINK_EXCL | \
697 CEPH_CAP_XATTR_EXCL | \
698 CEPH_CAP_FILE_EXCL)
699#define CEPH_CAP_ANY_FILE_RD (CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE | \
700 CEPH_CAP_FILE_SHARED)
701#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
702 CEPH_CAP_FILE_EXCL)
703#define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
704#define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
705 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
706 CEPH_CAP_PIN)
707#define CEPH_CAP_ALL_FILE (CEPH_CAP_PIN | CEPH_CAP_ANY_SHARED | \
708 CEPH_CAP_AUTH_EXCL | CEPH_CAP_XATTR_EXCL | \
709 CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)
710
711#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
712 CEPH_LOCK_IXATTR)
713
714/* cap masks async dir operations */
715#define CEPH_CAP_DIR_CREATE CEPH_CAP_FILE_CACHE
716#define CEPH_CAP_DIR_UNLINK CEPH_CAP_FILE_RD
717#define CEPH_CAP_ANY_DIR_OPS (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | \
718 CEPH_CAP_FILE_WREXTEND | CEPH_CAP_FILE_LAZYIO)
719
720int ceph_caps_for_mode(int mode);
721
722enum {
723 CEPH_CAP_OP_GRANT, /* mds->client grant */
724 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
725 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
726 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
727 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
728 CEPH_CAP_OP_UPDATE, /* client->mds update */
729 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
730 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
731 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
732 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
733 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
734 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
735 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
736};
737
738extern const char *ceph_cap_op_name(int op);
739
740/* flags field in client cap messages (version >= 10) */
741#define CEPH_CLIENT_CAPS_SYNC (1<<0)
742#define CEPH_CLIENT_CAPS_NO_CAPSNAP (1<<1)
743#define CEPH_CLIENT_CAPS_PENDING_CAPSNAP (1<<2)
744
745/*
746 * caps message, used for capability callbacks, acks, requests, etc.
747 */
748struct ceph_mds_caps {
749 __le32 op; /* CEPH_CAP_OP_* */
750 __le64 ino, realm;
751 __le64 cap_id;
752 __le32 seq, issue_seq;
753 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
754 __le32 migrate_seq;
755 __le64 snap_follows;
756 __le32 snap_trace_len;
757
758 /* authlock */
759 __le32 uid, gid, mode;
760
761 /* linklock */
762 __le32 nlink;
763
764 /* xattrlock */
765 __le32 xattr_len;
766 __le64 xattr_version;
767
768 /* filelock */
769 __le64 size, max_size, truncate_size;
770 __le32 truncate_seq;
771 struct ceph_timespec mtime, atime, ctime;
772 struct ceph_file_layout_legacy layout;
773 __le32 time_warp_seq;
774} __attribute__ ((packed));
775
776struct ceph_mds_cap_peer {
777 __le64 cap_id;
778 __le32 seq;
779 __le32 mseq;
780 __le32 mds;
781 __u8 flags;
782} __attribute__ ((packed));
783
784/* cap release msg head */
785struct ceph_mds_cap_release {
786 __le32 num; /* number of cap_items that follow */
787} __attribute__ ((packed));
788
789struct ceph_mds_cap_item {
790 __le64 ino;
791 __le64 cap_id;
792 __le32 migrate_seq, seq;
793} __attribute__ ((packed));
794
795#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
796#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
797#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
798#define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
799
800extern const char *ceph_lease_op_name(int o);
801
802/* lease msg header */
803struct ceph_mds_lease {
804 __u8 action; /* CEPH_MDS_LEASE_* */
805 __le16 mask; /* which lease */
806 __le64 ino;
807 __le64 first, last; /* snap range */
808 __le32 seq;
809 __le32 duration_ms; /* duration of renewal */
810} __attribute__ ((packed));
811/* followed by a __le32+string for dname */
812
813/* client reconnect */
814struct ceph_mds_cap_reconnect {
815 __le64 cap_id;
816 __le32 wanted;
817 __le32 issued;
818 __le64 snaprealm;
819 __le64 pathbase; /* base ino for our path to this ino */
820 __le32 flock_len; /* size of flock state blob, if any */
821} __attribute__ ((packed));
822/* followed by flock blob */
823
824struct ceph_mds_cap_reconnect_v1 {
825 __le64 cap_id;
826 __le32 wanted;
827 __le32 issued;
828 __le64 size;
829 struct ceph_timespec mtime, atime;
830 __le64 snaprealm;
831 __le64 pathbase; /* base ino for our path to this ino */
832} __attribute__ ((packed));
833
834struct ceph_mds_snaprealm_reconnect {
835 __le64 ino; /* snap realm base */
836 __le64 seq; /* snap seq for this snap realm */
837 __le64 parent; /* parent realm */
838} __attribute__ ((packed));
839
840/*
841 * snaps
842 */
843enum {
844 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
845 CEPH_SNAP_OP_CREATE,
846 CEPH_SNAP_OP_DESTROY,
847 CEPH_SNAP_OP_SPLIT,
848};
849
850extern const char *ceph_snap_op_name(int o);
851
852/* snap msg header */
853struct ceph_mds_snap_head {
854 __le32 op; /* CEPH_SNAP_OP_* */
855 __le64 split; /* ino to split off, if any */
856 __le32 num_split_inos; /* # inos belonging to new child realm */
857 __le32 num_split_realms; /* # child realms udner new child realm */
858 __le32 trace_len; /* size of snap trace blob */
859} __attribute__ ((packed));
860/* followed by split ino list, then split realms, then the trace blob */
861
862/*
863 * encode info about a snaprealm, as viewed by a client
864 */
865struct ceph_mds_snap_realm {
866 __le64 ino; /* ino */
867 __le64 created; /* snap: when created */
868 __le64 parent; /* ino: parent realm */
869 __le64 parent_since; /* snap: same parent since */
870 __le64 seq; /* snap: version */
871 __le32 num_snaps;
872 __le32 num_prior_parent_snaps;
873} __attribute__ ((packed));
874/* followed by my snap list, then prior parent snap list */
875
876/*
877 * quotas
878 */
879struct ceph_mds_quota {
880 __le64 ino; /* ino */
881 struct ceph_timespec rctime;
882 __le64 rbytes; /* dir stats */
883 __le64 rfiles;
884 __le64 rsubdirs;
885 __u8 struct_v; /* compat */
886 __u8 struct_compat;
887 __le32 struct_len;
888 __le64 max_bytes; /* quota max. bytes */
889 __le64 max_files; /* quota max. files */
890} __attribute__ ((packed));
891
892#endif