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ceph: don't crash when passed bad mount options
[mirror_ubuntu-bionic-kernel.git] / include / linux / ceph / ceph_fs.h
CommitLineData
0dee3c28
SW		 1/*
2 * ceph_fs.h - Ceph constants and data types to share between kernel and
3 * user space.
4 *
5 * Most types in this file are defined as little-endian, and are
6 * primarily intended to describe data structures that pass over the
7 * wire or that are stored on disk.
8 *
9 * LGPL2
10 */
11
5cd068c2
SW		 12#ifndef CEPH_FS_H
13#define CEPH_FS_H
0dee3c28
SW		 14
15#include "msgr.h"
16#include "rados.h"
17
0dee3c28
SW		 18/*
19 * subprotocol versions. when specific messages types or high-level
20 * protocols change, bump the affected components. we keep rev
21 * internal cluster protocols separately from the public,
22 * client-facing protocol.
23 */
6df058c0 24#define CEPH_OSD_PROTOCOL 8 /* cluster internal */
ca9d93a2 25#define CEPH_MDS_PROTOCOL 12 /* cluster internal */
13e38c8a 26#define CEPH_MON_PROTOCOL 5 /* cluster internal */
0c948992 27#define CEPH_OSDC_PROTOCOL 24 /* server/client */
3ea25f94 28#define CEPH_MDSC_PROTOCOL 32 /* server/client */
13e38c8a 29#define CEPH_MONC_PROTOCOL 15 /* server/client */
0dee3c28
SW		 30
31
32#define CEPH_INO_ROOT 1
1d1de916 33#define CEPH_INO_CEPH 2 /* hidden .ceph dir */
0dee3c28
SW		 34
35/* arbitrary limit on max # of monitors (cluster of 3 is typical) */
36#define CEPH_MAX_MON 31
37
38
04a419f9
SW		 39/*
40 * feature bits
41 */
9688f19a
SW		 42#define CEPH_FEATURE_UID (1<<0)
43#define CEPH_FEATURE_NOSRCADDR (1<<1)
44#define CEPH_FEATURE_MONCLOCKCHECK (1<<2)
45#define CEPH_FEATURE_FLOCK (1<<3)
04a419f9 46
0dee3c28
SW		 47
48/*
49 * ceph_file_layout - describe data layout for a file/inode
50 */
51struct ceph_file_layout {
52 /* file -> object mapping */
53 __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
54 of page size. */
55 __le32 fl_stripe_count; /* over this many objects */
56 __le32 fl_object_size; /* until objects are this big, then move to
57 new objects */
58 __le32 fl_cas_hash; /* 0 = none; 1 = sha256 */
59
60 /* pg -> disk layout */
61 __le32 fl_object_stripe_unit; /* for per-object parity, if any */
62
63 /* object -> pg layout */
64 __le32 fl_pg_preferred; /* preferred primary for pg (-1 for none) */
65 __le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
66} __attribute__ ((packed));
67
752727a1 68#define CEPH_MIN_STRIPE_UNIT 65536
0dee3c28 69
752727a1 70int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
0dee3c28
SW		 71
72
4e7a5dcd
SW		 73/* crypto algorithms */
74#define CEPH_CRYPTO_NONE 0x0
75#define CEPH_CRYPTO_AES 0x1
76
cbbfe499
SW		 77#define CEPH_AES_IV "cephsageyudagreg"
78
4e7a5dcd
SW		 79/* security/authentication protocols */
80#define CEPH_AUTH_UNKNOWN 0x0
81#define CEPH_AUTH_NONE 0x1
82#define CEPH_AUTH_CEPHX 0x2
83
ca9d93a2
SW		 84#define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
85
4e7a5dcd 86
0dee3c28
SW		 87/*********************************************
88 * message layer
89 */
90
91/*
92 * message types
93 */
94
95/* misc */
96#define CEPH_MSG_SHUTDOWN 1
97#define CEPH_MSG_PING 2
98
99/* client <-> monitor */
100#define CEPH_MSG_MON_MAP 4
101#define CEPH_MSG_MON_GET_MAP 5
0dee3c28
SW		 102#define CEPH_MSG_STATFS 13
103#define CEPH_MSG_STATFS_REPLY 14
104#define CEPH_MSG_MON_SUBSCRIBE 15
105#define CEPH_MSG_MON_SUBSCRIBE_ACK 16
4e7a5dcd
SW		 106#define CEPH_MSG_AUTH 17
107#define CEPH_MSG_AUTH_REPLY 18
0dee3c28
SW		 108
109/* client <-> mds */
0dee3c28
SW		 110#define CEPH_MSG_MDS_MAP 21
111
112#define CEPH_MSG_CLIENT_SESSION 22
113#define CEPH_MSG_CLIENT_RECONNECT 23
114
115#define CEPH_MSG_CLIENT_REQUEST 24
116#define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
117#define CEPH_MSG_CLIENT_REPLY 26
118#define CEPH_MSG_CLIENT_CAPS 0x310
119#define CEPH_MSG_CLIENT_LEASE 0x311
120#define CEPH_MSG_CLIENT_SNAP 0x312
121#define CEPH_MSG_CLIENT_CAPRELEASE 0x313
122
ca9d93a2
SW		 123/* pool ops */
124#define CEPH_MSG_POOLOP_REPLY 48
125#define CEPH_MSG_POOLOP 49
126
127
0dee3c28 128/* osd */
0dee3c28
SW		 129#define CEPH_MSG_OSD_MAP 41
130#define CEPH_MSG_OSD_OP 42
131#define CEPH_MSG_OSD_OPREPLY 43
132
ca9d93a2
SW		 133/* pool operations */
134enum {
135 POOL_OP_CREATE = 0x01,
136 POOL_OP_DELETE = 0x02,
137 POOL_OP_AUID_CHANGE = 0x03,
138 POOL_OP_CREATE_SNAP = 0x11,
139 POOL_OP_DELETE_SNAP = 0x12,
140 POOL_OP_CREATE_UNMANAGED_SNAP = 0x21,
141 POOL_OP_DELETE_UNMANAGED_SNAP = 0x22,
142};
143
13e38c8a
SW		 144struct ceph_mon_request_header {
145 __le64 have_version;
146 __le16 session_mon;
147 __le64 session_mon_tid;
148} __attribute__ ((packed));
0dee3c28
SW		 149
150struct ceph_mon_statfs {
13e38c8a 151 struct ceph_mon_request_header monhdr;
0dee3c28 152 struct ceph_fsid fsid;
0dee3c28
SW		 153} __attribute__ ((packed));
154
155struct ceph_statfs {
156 __le64 kb, kb_used, kb_avail;
157 __le64 num_objects;
158} __attribute__ ((packed));
159
160struct ceph_mon_statfs_reply {
161 struct ceph_fsid fsid;
0dee3c28
SW		 162 __le64 version;
163 struct ceph_statfs st;
164} __attribute__ ((packed));
165
ca9d93a2
SW		 166const char *ceph_pool_op_name(int op);
167
168struct ceph_mon_poolop {
169 struct ceph_mon_request_header monhdr;
170 struct ceph_fsid fsid;
171 __le32 pool;
172 __le32 op;
173 __le64 auid;
174 __le64 snapid;
175 __le32 name_len;
176} __attribute__ ((packed));
177
178struct ceph_mon_poolop_reply {
179 struct ceph_mon_request_header monhdr;
180 struct ceph_fsid fsid;
181 __le32 reply_code;
182 __le32 epoch;
183 char has_data;
184 char data[0];
185} __attribute__ ((packed));
186
187struct ceph_mon_unmanaged_snap {
188 __le64 snapid;
189} __attribute__ ((packed));
190
0dee3c28 191struct ceph_osd_getmap {
13e38c8a 192 struct ceph_mon_request_header monhdr;
0dee3c28
SW		 193 struct ceph_fsid fsid;
194 __le32 start;
195} __attribute__ ((packed));
196
197struct ceph_mds_getmap {
13e38c8a 198 struct ceph_mon_request_header monhdr;
0dee3c28
SW		 199 struct ceph_fsid fsid;
200} __attribute__ ((packed));
201
202struct ceph_client_mount {
13e38c8a 203 struct ceph_mon_request_header monhdr;
0dee3c28
SW		 204} __attribute__ ((packed));
205
206struct ceph_mon_subscribe_item {
13e38c8a 207 __le64 have_version; __le64 have;
0dee3c28
SW		 208 __u8 onetime;
209} __attribute__ ((packed));
210
07bd10fb
SW		 211struct ceph_mon_subscribe_ack {
212 __le32 duration; /* seconds */
213 struct ceph_fsid fsid;
214} __attribute__ ((packed));
215
0dee3c28
SW		 216/*
217 * mds states
218 * > 0 -> in
219 * <= 0 -> out
220 */
221#define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
222#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
223 empty log. */
224#define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
225#define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
226#define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
227#define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
228#define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
229
230#define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
231#define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
232 operations (import, rename, etc.) */
233#define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
234#define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
235#define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
236#define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
237#define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
238
239extern const char *ceph_mds_state_name(int s);
240
241
242/*
243 * metadata lock types.
244 * - these are bitmasks.. we can compose them
245 * - they also define the lock ordering by the MDS
246 * - a few of these are internal to the mds
247 */
dd1c9057
SW		 248#define CEPH_LOCK_DVERSION 1
249#define CEPH_LOCK_DN 2
250#define CEPH_LOCK_ISNAP 16
251#define CEPH_LOCK_IVERSION 32 /* mds internal */
252#define CEPH_LOCK_IFILE 64
253#define CEPH_LOCK_IAUTH 128
254#define CEPH_LOCK_ILINK 256
255#define CEPH_LOCK_IDFT 512 /* dir frag tree */
256#define CEPH_LOCK_INEST 1024 /* mds internal */
257#define CEPH_LOCK_IXATTR 2048
f0b18d9f 258#define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
dd1c9057 259#define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
0dee3c28
SW		 260
261/* client_session ops */
262enum {
263 CEPH_SESSION_REQUEST_OPEN,
264 CEPH_SESSION_OPEN,
265 CEPH_SESSION_REQUEST_CLOSE,
266 CEPH_SESSION_CLOSE,
267 CEPH_SESSION_REQUEST_RENEWCAPS,
268 CEPH_SESSION_RENEWCAPS,
269 CEPH_SESSION_STALE,
270 CEPH_SESSION_RECALL_STATE,
271};
272
273extern const char *ceph_session_op_name(int op);
274
275struct ceph_mds_session_head {
276 __le32 op;
277 __le64 seq;
278 struct ceph_timespec stamp;
279 __le32 max_caps, max_leases;
280} __attribute__ ((packed));
281
282/* client_request */
283/*
284 * metadata ops.
285 * & 0x001000 -> write op
286 * & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
287 & & 0x100000 -> use weird ino/path trace
288 */
289#define CEPH_MDS_OP_WRITE 0x001000
290enum {
291 CEPH_MDS_OP_LOOKUP = 0x00100,
292 CEPH_MDS_OP_GETATTR = 0x00101,
293 CEPH_MDS_OP_LOOKUPHASH = 0x00102,
294 CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
295
296 CEPH_MDS_OP_SETXATTR = 0x01105,
297 CEPH_MDS_OP_RMXATTR = 0x01106,
298 CEPH_MDS_OP_SETLAYOUT = 0x01107,
299 CEPH_MDS_OP_SETATTR = 0x01108,
fbaad979
GF		 300 CEPH_MDS_OP_SETFILELOCK= 0x01109,
301 CEPH_MDS_OP_GETFILELOCK= 0x00110,
0dee3c28
SW		 302
303 CEPH_MDS_OP_MKNOD = 0x01201,
304 CEPH_MDS_OP_LINK = 0x01202,
305 CEPH_MDS_OP_UNLINK = 0x01203,
306 CEPH_MDS_OP_RENAME = 0x01204,
307 CEPH_MDS_OP_MKDIR = 0x01220,
308 CEPH_MDS_OP_RMDIR = 0x01221,
309 CEPH_MDS_OP_SYMLINK = 0x01222,
310
3ea25f94 311 CEPH_MDS_OP_CREATE = 0x01301,
0dee3c28
SW		 312 CEPH_MDS_OP_OPEN = 0x00302,
313 CEPH_MDS_OP_READDIR = 0x00305,
314
315 CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
316 CEPH_MDS_OP_MKSNAP = 0x01400,
317 CEPH_MDS_OP_RMSNAP = 0x01401,
318 CEPH_MDS_OP_LSSNAP = 0x00402,
319};
320
321extern const char *ceph_mds_op_name(int op);
322
323
324#define CEPH_SETATTR_MODE 1
325#define CEPH_SETATTR_UID 2
326#define CEPH_SETATTR_GID 4
327#define CEPH_SETATTR_MTIME 8
328#define CEPH_SETATTR_ATIME 16
329#define CEPH_SETATTR_SIZE 32
330#define CEPH_SETATTR_CTIME 64
331
332union ceph_mds_request_args {
333 struct {
334 __le32 mask; /* CEPH_CAP_* */
335 } __attribute__ ((packed)) getattr;
336 struct {
337 __le32 mode;
338 __le32 uid;
339 __le32 gid;
340 struct ceph_timespec mtime;
341 struct ceph_timespec atime;
342 __le64 size, old_size; /* old_size needed by truncate */
343 __le32 mask; /* CEPH_SETATTR_* */
344 } __attribute__ ((packed)) setattr;
345 struct {
346 __le32 frag; /* which dir fragment */
347 __le32 max_entries; /* how many dentries to grab */
23804d91 348 __le32 max_bytes;
0dee3c28
SW		 349 } __attribute__ ((packed)) readdir;
350 struct {
351 __le32 mode;
352 __le32 rdev;
353 } __attribute__ ((packed)) mknod;
354 struct {
355 __le32 mode;
356 } __attribute__ ((packed)) mkdir;
357 struct {
358 __le32 flags;
359 __le32 mode;
360 __le32 stripe_unit; /* layout for newly created file */
361 __le32 stripe_count; /* ... */
362 __le32 object_size;
363 __le32 file_replication;
364 __le32 preferred;
365 } __attribute__ ((packed)) open;
366 struct {
367 __le32 flags;
368 } __attribute__ ((packed)) setxattr;
369 struct {
370 struct ceph_file_layout layout;
371 } __attribute__ ((packed)) setlayout;
fbaad979
GF		 372 struct {
373 __u8 rule; /* currently fcntl or flock */
374 __u8 type; /* shared, exclusive, remove*/
375 __le64 pid; /* process id requesting the lock */
376 __le64 pid_namespace;
377 __le64 start; /* initial location to lock */
378 __le64 length; /* num bytes to lock from start */
379 __u8 wait; /* will caller wait for lock to become available? */
380 } __attribute__ ((packed)) filelock_change;
0dee3c28
SW		 381} __attribute__ ((packed));
382
383#define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
384#define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
385
386struct ceph_mds_request_head {
6df058c0 387 __le64 oldest_client_tid;
0dee3c28
SW		 388 __le32 mdsmap_epoch; /* on client */
389 __le32 flags; /* CEPH_MDS_FLAG_* */
390 __u8 num_retry, num_fwd; /* count retry, fwd attempts */
391 __le16 num_releases; /* # include cap/lease release records */
392 __le32 op; /* mds op code */
393 __le32 caller_uid, caller_gid;
394 __le64 ino; /* use this ino for openc, mkdir, mknod,
395 etc. (if replaying) */
396 union ceph_mds_request_args args;
397} __attribute__ ((packed));
398
399/* cap/lease release record */
400struct ceph_mds_request_release {
401 __le64 ino, cap_id; /* ino and unique cap id */
402 __le32 caps, wanted; /* new issued, wanted */
403 __le32 seq, issue_seq, mseq;
404 __le32 dname_seq; /* if releasing a dentry lease, a */
405 __le32 dname_len; /* string follows. */
406} __attribute__ ((packed));
407
408/* client reply */
409struct ceph_mds_reply_head {
0dee3c28
SW		 410 __le32 op;
411 __le32 result;
412 __le32 mdsmap_epoch;
413 __u8 safe; /* true if committed to disk */
414 __u8 is_dentry, is_target; /* true if dentry, target inode records
415 are included with reply */
416} __attribute__ ((packed));
417
418/* one for each node split */
419struct ceph_frag_tree_split {
420 __le32 frag; /* this frag splits... */
421 __le32 by; /* ...by this many bits */
422} __attribute__ ((packed));
423
424struct ceph_frag_tree_head {
425 __le32 nsplits; /* num ceph_frag_tree_split records */
426 struct ceph_frag_tree_split splits[];
427} __attribute__ ((packed));
428
429/* capability issue, for bundling with mds reply */
430struct ceph_mds_reply_cap {
431 __le32 caps, wanted; /* caps issued, wanted */
432 __le64 cap_id;
433 __le32 seq, mseq;
434 __le64 realm; /* snap realm */
435 __u8 flags; /* CEPH_CAP_FLAG_* */
436} __attribute__ ((packed));
437
438#define CEPH_CAP_FLAG_AUTH 1 /* cap is issued by auth mds */
439
440/* inode record, for bundling with mds reply */
441struct ceph_mds_reply_inode {
442 __le64 ino;
443 __le64 snapid;
444 __le32 rdev;
445 __le64 version; /* inode version */
446 __le64 xattr_version; /* version for xattr blob */
447 struct ceph_mds_reply_cap cap; /* caps issued for this inode */
448 struct ceph_file_layout layout;
449 struct ceph_timespec ctime, mtime, atime;
450 __le32 time_warp_seq;
451 __le64 size, max_size, truncate_size;
452 __le32 truncate_seq;
453 __le32 mode, uid, gid;
454 __le32 nlink;
455 __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
456 struct ceph_timespec rctime;
457 struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
458} __attribute__ ((packed));
459/* followed by frag array, then symlink string, then xattr blob */
460
461/* reply_lease follows dname, and reply_inode */
462struct ceph_mds_reply_lease {
463 __le16 mask; /* lease type(s) */
464 __le32 duration_ms; /* lease duration */
465 __le32 seq;
466} __attribute__ ((packed));
467
468struct ceph_mds_reply_dirfrag {
469 __le32 frag; /* fragment */
470 __le32 auth; /* auth mds, if this is a delegation point */
471 __le32 ndist; /* number of mds' this is replicated on */
472 __le32 dist[];
473} __attribute__ ((packed));
474
fbaad979
GF		 475#define CEPH_LOCK_FCNTL 1
476#define CEPH_LOCK_FLOCK 2
477
478#define CEPH_LOCK_SHARED 1
479#define CEPH_LOCK_EXCL 2
480#define CEPH_LOCK_UNLOCK 4
481
482struct ceph_filelock {
483 __le64 start;/* file offset to start lock at */
484 __le64 length; /* num bytes to lock; 0 for all following start */
485 __le64 client; /* which client holds the lock */
486 __le64 pid; /* process id holding the lock on the client */
487 __le64 pid_namespace;
488 __u8 type; /* shared lock, exclusive lock, or unlock */
489} __attribute__ ((packed));
490
491
0dee3c28
SW		 492/* file access modes */
493#define CEPH_FILE_MODE_PIN 0
494#define CEPH_FILE_MODE_RD 1
495#define CEPH_FILE_MODE_WR 2
496#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
497#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
498#define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
499
500int ceph_flags_to_mode(int flags);
501
502
503/* capability bits */
504#define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
505
506/* generic cap bits */
507#define CEPH_CAP_GSHARED 1 /* client can reads */
508#define CEPH_CAP_GEXCL 2 /* client can read and update */
509#define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
510#define CEPH_CAP_GRD 8 /* (file) client can read */
511#define CEPH_CAP_GWR 16 /* (file) client can write */
512#define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
513#define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
514#define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
515
516/* per-lock shift */
517#define CEPH_CAP_SAUTH 2
518#define CEPH_CAP_SLINK 4
519#define CEPH_CAP_SXATTR 6
fbaad979
GF		 520#define CEPH_CAP_SFILE 8
521#define CEPH_CAP_SFLOCK 20
0dee3c28 522
fbaad979 523#define CEPH_CAP_BITS 22
0dee3c28
SW		 524
525/* composed values */
526#define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
527#define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
528#define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
529#define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
530#define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
531#define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
532#define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
533#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
534#define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
535#define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
536#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
537#define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
538#define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
539#define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
540#define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
fbaad979
GF		 541#define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
542#define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
543
0dee3c28
SW		 544
545/* cap masks (for getattr) */
546#define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
547#define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
548#define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
549#define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
550#define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
551#define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
552#define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
553#define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
554#define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
555#define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
556#define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
557#define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
558#define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
559 CEPH_CAP_AUTH_SHARED | \
560 CEPH_CAP_LINK_SHARED | \
561 CEPH_CAP_FILE_SHARED | \
562 CEPH_CAP_XATTR_SHARED)
563
564#define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
565 CEPH_CAP_LINK_SHARED | \
566 CEPH_CAP_XATTR_SHARED | \
567 CEPH_CAP_FILE_SHARED)
568#define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
569 CEPH_CAP_FILE_CACHE)
570
571#define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
572 CEPH_CAP_LINK_EXCL | \
573 CEPH_CAP_XATTR_EXCL | \
574 CEPH_CAP_FILE_EXCL)
575#define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
576 CEPH_CAP_FILE_EXCL)
577#define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
578#define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
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SW		 579 CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
580 CEPH_CAP_PIN)
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SW		 581
582#define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
583 CEPH_LOCK_IXATTR)
584
585int ceph_caps_for_mode(int mode);
586
587enum {
588 CEPH_CAP_OP_GRANT, /* mds->client grant */
589 CEPH_CAP_OP_REVOKE, /* mds->client revoke */
590 CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
591 CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
592 CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
593 CEPH_CAP_OP_UPDATE, /* client->mds update */
594 CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
595 CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
596 CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
597 CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
598 CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
599 CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
600 CEPH_CAP_OP_RENEW, /* client->mds renewal request */
601};
602
603extern const char *ceph_cap_op_name(int op);
604
605/*
606 * caps message, used for capability callbacks, acks, requests, etc.
607 */
608struct ceph_mds_caps {
609 __le32 op; /* CEPH_CAP_OP_* */
610 __le64 ino, realm;
611 __le64 cap_id;
612 __le32 seq, issue_seq;
613 __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
614 __le32 migrate_seq;
615 __le64 snap_follows;
616 __le32 snap_trace_len;
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SW		 617
618 /* authlock */
619 __le32 uid, gid, mode;
620
621 /* linklock */
622 __le32 nlink;
623
624 /* xattrlock */
625 __le32 xattr_len;
626 __le64 xattr_version;
627
628 /* filelock */
629 __le64 size, max_size, truncate_size;
630 __le32 truncate_seq;
631 struct ceph_timespec mtime, atime, ctime;
632 struct ceph_file_layout layout;
633 __le32 time_warp_seq;
634} __attribute__ ((packed));
635
636/* cap release msg head */
637struct ceph_mds_cap_release {
638 __le32 num; /* number of cap_items that follow */
639} __attribute__ ((packed));
640
641struct ceph_mds_cap_item {
642 __le64 ino;
643 __le64 cap_id;
644 __le32 migrate_seq, seq;
645} __attribute__ ((packed));
646
647#define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
648#define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
649#define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
650#define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
651
652extern const char *ceph_lease_op_name(int o);
653
654/* lease msg header */
655struct ceph_mds_lease {
656 __u8 action; /* CEPH_MDS_LEASE_* */
657 __le16 mask; /* which lease */
658 __le64 ino;
659 __le64 first, last; /* snap range */
660 __le32 seq;
661 __le32 duration_ms; /* duration of renewal */
662} __attribute__ ((packed));
663/* followed by a __le32+string for dname */
664
665/* client reconnect */
666struct ceph_mds_cap_reconnect {
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SW		 667 __le64 cap_id;
668 __le32 wanted;
669 __le32 issued;
670 __le64 snaprealm;
671 __le64 pathbase; /* base ino for our path to this ino */
672 __le32 flock_len; /* size of flock state blob, if any */
673} __attribute__ ((packed));
674/* followed by flock blob */
675
676struct ceph_mds_cap_reconnect_v1 {
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SW		 677 __le64 cap_id;
678 __le32 wanted;
679 __le32 issued;
680 __le64 size;
681 struct ceph_timespec mtime, atime;
682 __le64 snaprealm;
683 __le64 pathbase; /* base ino for our path to this ino */
684} __attribute__ ((packed));
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SW		 685
686struct ceph_mds_snaprealm_reconnect {
687 __le64 ino; /* snap realm base */
688 __le64 seq; /* snap seq for this snap realm */
689 __le64 parent; /* parent realm */
690} __attribute__ ((packed));
691
692/*
693 * snaps
694 */
695enum {
696 CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
697 CEPH_SNAP_OP_CREATE,
698 CEPH_SNAP_OP_DESTROY,
699 CEPH_SNAP_OP_SPLIT,
700};
701
702extern const char *ceph_snap_op_name(int o);
703
704/* snap msg header */
705struct ceph_mds_snap_head {
706 __le32 op; /* CEPH_SNAP_OP_* */
707 __le64 split; /* ino to split off, if any */
708 __le32 num_split_inos; /* # inos belonging to new child realm */
709 __le32 num_split_realms; /* # child realms udner new child realm */
710 __le32 trace_len; /* size of snap trace blob */
711} __attribute__ ((packed));
712/* followed by split ino list, then split realms, then the trace blob */
713
714/*
715 * encode info about a snaprealm, as viewed by a client
716 */
717struct ceph_mds_snap_realm {
718 __le64 ino; /* ino */
719 __le64 created; /* snap: when created */
720 __le64 parent; /* ino: parent realm */
721 __le64 parent_since; /* snap: same parent since */
722 __le64 seq; /* snap: version */
723 __le32 num_snaps;
724 __le32 num_prior_parent_snaps;
725} __attribute__ ((packed));
726/* followed by my snap list, then prior parent snap list */
727
728#endif
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