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ceph_fs.h
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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_OSD_PROTOCOL 8 /* cluster internal */
25 #define CEPH_MDS_PROTOCOL 12 /* cluster internal */
26 #define CEPH_MON_PROTOCOL 5 /* cluster internal */
27 #define CEPH_OSDC_PROTOCOL 24 /* server/client */
28 #define CEPH_MDSC_PROTOCOL 32 /* server/client */
29 #define CEPH_MONC_PROTOCOL 15 /* server/client */
30 
31 
32 #define CEPH_INO_ROOT 1
33 #define CEPH_INO_CEPH 2 /* hidden .ceph dir */
34 
35 /* arbitrary limit on max # of monitors (cluster of 3 is typical) */
36 #define CEPH_MAX_MON 31
37 
38 /*
39  * ceph_file_layout - describe data layout for a file/inode
40  */
41 struct ceph_file_layout {
42  /* file -> object mapping */
43  __le32 fl_stripe_unit; /* stripe unit, in bytes. must be multiple
44  of page size. */
45  __le32 fl_stripe_count; /* over this many objects */
46  __le32 fl_object_size; /* until objects are this big, then move to
47  new objects */
48  __le32 fl_cas_hash; /* UNUSED. 0 = none; 1 = sha256 */
49 
50  /* pg -> disk layout */
51  __le32 fl_object_stripe_unit; /* UNUSED. for per-object parity, if any */
52 
53  /* object -> pg layout */
54  __le32 fl_unused; /* unused; used to be preferred primary (-1) */
55  __le32 fl_pg_pool; /* namespace, crush ruleset, rep level */
56 } __attribute__ ((packed));
57 
58 #define CEPH_MIN_STRIPE_UNIT 65536
59 
60 int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
61 
62 struct ceph_dir_layout {
63  __u8 dl_dir_hash; /* see ceph_hash.h for ids */
64  __u8 dl_unused1;
65  __u16 dl_unused2;
66  __u32 dl_unused3;
67 } __attribute__ ((packed));
68 
69 /* crypto algorithms */
70 #define CEPH_CRYPTO_NONE 0x0
71 #define CEPH_CRYPTO_AES 0x1
72 
73 #define CEPH_AES_IV "cephsageyudagreg"
74 
75 /* security/authentication protocols */
76 #define CEPH_AUTH_UNKNOWN 0x0
77 #define CEPH_AUTH_NONE 0x1
78 #define CEPH_AUTH_CEPHX 0x2
79 
80 #define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
81 
82 
83 /*********************************************
84  * message layer
85  */
86 
87 /*
88  * message types
89  */
90 
91 /* misc */
92 #define CEPH_MSG_SHUTDOWN 1
93 #define CEPH_MSG_PING 2
94 
95 /* client <-> monitor */
96 #define CEPH_MSG_MON_MAP 4
97 #define CEPH_MSG_MON_GET_MAP 5
98 #define CEPH_MSG_STATFS 13
99 #define CEPH_MSG_STATFS_REPLY 14
100 #define CEPH_MSG_MON_SUBSCRIBE 15
101 #define CEPH_MSG_MON_SUBSCRIBE_ACK 16
102 #define CEPH_MSG_AUTH 17
103 #define CEPH_MSG_AUTH_REPLY 18
104 
105 /* client <-> mds */
106 #define CEPH_MSG_MDS_MAP 21
107 
108 #define CEPH_MSG_CLIENT_SESSION 22
109 #define CEPH_MSG_CLIENT_RECONNECT 23
110 
111 #define CEPH_MSG_CLIENT_REQUEST 24
112 #define CEPH_MSG_CLIENT_REQUEST_FORWARD 25
113 #define CEPH_MSG_CLIENT_REPLY 26
114 #define CEPH_MSG_CLIENT_CAPS 0x310
115 #define CEPH_MSG_CLIENT_LEASE 0x311
116 #define CEPH_MSG_CLIENT_SNAP 0x312
117 #define CEPH_MSG_CLIENT_CAPRELEASE 0x313
118 
119 /* pool ops */
120 #define CEPH_MSG_POOLOP_REPLY 48
121 #define CEPH_MSG_POOLOP 49
122 
123 
124 /* osd */
125 #define CEPH_MSG_OSD_MAP 41
126 #define CEPH_MSG_OSD_OP 42
127 #define CEPH_MSG_OSD_OPREPLY 43
128 #define CEPH_MSG_WATCH_NOTIFY 44
129 
130 
131 /* watch-notify operations */
132 enum {
133  WATCH_NOTIFY = 1, /* notifying watcher */
134  WATCH_NOTIFY_COMPLETE = 2, /* notifier notified when done */
135 };
136 
137 
138 /* pool operations */
139 enum {
140  POOL_OP_CREATE = 0x01,
141  POOL_OP_DELETE = 0x02,
142  POOL_OP_AUID_CHANGE = 0x03,
143  POOL_OP_CREATE_SNAP = 0x11,
144  POOL_OP_DELETE_SNAP = 0x12,
145  POOL_OP_CREATE_UNMANAGED_SNAP = 0x21,
146  POOL_OP_DELETE_UNMANAGED_SNAP = 0x22,
147 };
148 
149 struct ceph_mon_request_header {
150  __le64 have_version;
151  __le16 session_mon;
152  __le64 session_mon_tid;
153 } __attribute__ ((packed));
154 
155 struct ceph_mon_statfs {
156  struct ceph_mon_request_header monhdr;
157  struct ceph_fsid fsid;
158 } __attribute__ ((packed));
159 
160 struct ceph_statfs {
161  __le64 kb, kb_used, kb_avail;
162  __le64 num_objects;
163 } __attribute__ ((packed));
164 
165 struct ceph_mon_statfs_reply {
166  struct ceph_fsid fsid;
167  __le64 version;
168  struct ceph_statfs st;
169 } __attribute__ ((packed));
170 
171 const char *ceph_pool_op_name(int op);
172 
173 struct ceph_mon_poolop {
174  struct ceph_mon_request_header monhdr;
175  struct ceph_fsid fsid;
176  __le32 pool;
177  __le32 op;
178  __le64 auid;
179  __le64 snapid;
180  __le32 name_len;
181 } __attribute__ ((packed));
182 
183 struct ceph_mon_poolop_reply {
184  struct ceph_mon_request_header monhdr;
185  struct ceph_fsid fsid;
186  __le32 reply_code;
187  __le32 epoch;
188  char has_data;
189  char data[0];
190 } __attribute__ ((packed));
191 
192 struct ceph_mon_unmanaged_snap {
193  __le64 snapid;
194 } __attribute__ ((packed));
195 
196 struct ceph_osd_getmap {
197  struct ceph_mon_request_header monhdr;
198  struct ceph_fsid fsid;
199  __le32 start;
200 } __attribute__ ((packed));
201 
202 struct ceph_mds_getmap {
203  struct ceph_mon_request_header monhdr;
204  struct ceph_fsid fsid;
205 } __attribute__ ((packed));
206 
207 struct ceph_client_mount {
208  struct ceph_mon_request_header monhdr;
209 } __attribute__ ((packed));
210 
211 #define CEPH_SUBSCRIBE_ONETIME 1 /* i want only 1 update after have */
212 
213 struct ceph_mon_subscribe_item {
214  __le64 have_version; __le64 have;
215  __u8 onetime;
216 } __attribute__ ((packed));
217 
218 struct ceph_mon_subscribe_ack {
219  __le32 duration; /* seconds */
220  struct ceph_fsid fsid;
221 } __attribute__ ((packed));
222 
223 /*
224  * mds states
225  * > 0 -> in
226  * <= 0 -> out
227  */
228 #define CEPH_MDS_STATE_DNE 0 /* down, does not exist. */
229 #define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees.
230  empty log. */
231 #define CEPH_MDS_STATE_BOOT -4 /* up, boot announcement. */
232 #define CEPH_MDS_STATE_STANDBY -5 /* up, idle. waiting for assignment. */
233 #define CEPH_MDS_STATE_CREATING -6 /* up, creating MDS instance. */
234 #define CEPH_MDS_STATE_STARTING -7 /* up, starting previously stopped mds */
235 #define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
236 
237 #define CEPH_MDS_STATE_REPLAY 8 /* up, replaying journal. */
238 #define CEPH_MDS_STATE_RESOLVE 9 /* up, disambiguating distributed
239  operations (import, rename, etc.) */
240 #define CEPH_MDS_STATE_RECONNECT 10 /* up, reconnect to clients */
241 #define CEPH_MDS_STATE_REJOIN 11 /* up, rejoining distributed cache */
242 #define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
243 #define CEPH_MDS_STATE_ACTIVE 13 /* up, active */
244 #define CEPH_MDS_STATE_STOPPING 14 /* up, but exporting metadata */
245 
246 extern const char *ceph_mds_state_name(int s);
247 
248 
249 /*
250  * metadata lock types.
251  * - these are bitmasks.. we can compose them
252  * - they also define the lock ordering by the MDS
253  * - a few of these are internal to the mds
254  */
255 #define CEPH_LOCK_DVERSION 1
256 #define CEPH_LOCK_DN 2
257 #define CEPH_LOCK_ISNAP 16
258 #define CEPH_LOCK_IVERSION 32 /* mds internal */
259 #define CEPH_LOCK_IFILE 64
260 #define CEPH_LOCK_IAUTH 128
261 #define CEPH_LOCK_ILINK 256
262 #define CEPH_LOCK_IDFT 512 /* dir frag tree */
263 #define CEPH_LOCK_INEST 1024 /* mds internal */
264 #define CEPH_LOCK_IXATTR 2048
265 #define CEPH_LOCK_IFLOCK 4096 /* advisory file locks */
266 #define CEPH_LOCK_INO 8192 /* immutable inode bits; not a lock */
267 
268 /* client_session ops */
269 enum {
270  CEPH_SESSION_REQUEST_OPEN,
271  CEPH_SESSION_OPEN,
272  CEPH_SESSION_REQUEST_CLOSE,
273  CEPH_SESSION_CLOSE,
274  CEPH_SESSION_REQUEST_RENEWCAPS,
275  CEPH_SESSION_RENEWCAPS,
276  CEPH_SESSION_STALE,
277  CEPH_SESSION_RECALL_STATE,
278 };
279 
280 extern const char *ceph_session_op_name(int op);
281 
282 struct 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
297 enum {
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 
304  CEPH_MDS_OP_SETXATTR = 0x01105,
305  CEPH_MDS_OP_RMXATTR = 0x01106,
306  CEPH_MDS_OP_SETLAYOUT = 0x01107,
307  CEPH_MDS_OP_SETATTR = 0x01108,
308  CEPH_MDS_OP_SETFILELOCK= 0x01109,
309  CEPH_MDS_OP_GETFILELOCK= 0x00110,
310  CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
311 
312  CEPH_MDS_OP_MKNOD = 0x01201,
313  CEPH_MDS_OP_LINK = 0x01202,
314  CEPH_MDS_OP_UNLINK = 0x01203,
315  CEPH_MDS_OP_RENAME = 0x01204,
316  CEPH_MDS_OP_MKDIR = 0x01220,
317  CEPH_MDS_OP_RMDIR = 0x01221,
318  CEPH_MDS_OP_SYMLINK = 0x01222,
319 
320  CEPH_MDS_OP_CREATE = 0x01301,
321  CEPH_MDS_OP_OPEN = 0x00302,
322  CEPH_MDS_OP_READDIR = 0x00305,
323 
324  CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
325  CEPH_MDS_OP_MKSNAP = 0x01400,
326  CEPH_MDS_OP_RMSNAP = 0x01401,
327  CEPH_MDS_OP_LSSNAP = 0x00402,
328 };
329 
330 extern const char *ceph_mds_op_name(int op);
331 
332 
333 #define CEPH_SETATTR_MODE 1
334 #define CEPH_SETATTR_UID 2
335 #define CEPH_SETATTR_GID 4
336 #define CEPH_SETATTR_MTIME 8
337 #define CEPH_SETATTR_ATIME 16
338 #define CEPH_SETATTR_SIZE 32
339 #define CEPH_SETATTR_CTIME 64
340 
341 union ceph_mds_request_args {
342  struct {
343  __le32 mask; /* CEPH_CAP_* */
344  } __attribute__ ((packed)) getattr;
345  struct {
346  __le32 mode;
347  __le32 uid;
348  __le32 gid;
349  struct ceph_timespec mtime;
350  struct ceph_timespec atime;
351  __le64 size, old_size; /* old_size needed by truncate */
352  __le32 mask; /* CEPH_SETATTR_* */
353  } __attribute__ ((packed)) setattr;
354  struct {
355  __le32 frag; /* which dir fragment */
356  __le32 max_entries; /* how many dentries to grab */
357  __le32 max_bytes;
358  } __attribute__ ((packed)) readdir;
359  struct {
360  __le32 mode;
361  __le32 rdev;
362  } __attribute__ ((packed)) mknod;
363  struct {
364  __le32 mode;
365  } __attribute__ ((packed)) mkdir;
366  struct {
367  __le32 flags;
368  __le32 mode;
369  __le32 stripe_unit; /* layout for newly created file */
370  __le32 stripe_count; /* ... */
371  __le32 object_size;
372  __le32 file_replication;
373  __le32 unused; /* used to be preferred osd */
374  } __attribute__ ((packed)) open;
375  struct {
376  __le32 flags;
377  } __attribute__ ((packed)) setxattr;
378  struct {
379  struct ceph_file_layout layout;
380  } __attribute__ ((packed)) setlayout;
381  struct {
382  __u8 rule; /* currently fcntl or flock */
383  __u8 type; /* shared, exclusive, remove*/
384  __le64 pid; /* process id requesting the lock */
385  __le64 pid_namespace;
386  __le64 start; /* initial location to lock */
387  __le64 length; /* num bytes to lock from start */
388  __u8 wait; /* will caller wait for lock to become available? */
389  } __attribute__ ((packed)) filelock_change;
390 } __attribute__ ((packed));
391 
392 #define CEPH_MDS_FLAG_REPLAY 1 /* this is a replayed op */
393 #define CEPH_MDS_FLAG_WANT_DENTRY 2 /* want dentry in reply */
394 
395 struct ceph_mds_request_head {
396  __le64 oldest_client_tid;
397  __le32 mdsmap_epoch; /* on client */
398  __le32 flags; /* CEPH_MDS_FLAG_* */
399  __u8 num_retry, num_fwd; /* count retry, fwd attempts */
400  __le16 num_releases; /* # include cap/lease release records */
401  __le32 op; /* mds op code */
402  __le32 caller_uid, caller_gid;
403  __le64 ino; /* use this ino for openc, mkdir, mknod,
404  etc. (if replaying) */
405  union ceph_mds_request_args args;
406 } __attribute__ ((packed));
407 
408 /* cap/lease release record */
409 struct ceph_mds_request_release {
410  __le64 ino, cap_id; /* ino and unique cap id */
411  __le32 caps, wanted; /* new issued, wanted */
412  __le32 seq, issue_seq, mseq;
413  __le32 dname_seq; /* if releasing a dentry lease, a */
414  __le32 dname_len; /* string follows. */
415 } __attribute__ ((packed));
416 
417 /* client reply */
418 struct ceph_mds_reply_head {
419  __le32 op;
420  __le32 result;
421  __le32 mdsmap_epoch;
422  __u8 safe; /* true if committed to disk */
423  __u8 is_dentry, is_target; /* true if dentry, target inode records
424  are included with reply */
425 } __attribute__ ((packed));
426 
427 /* one for each node split */
428 struct ceph_frag_tree_split {
429  __le32 frag; /* this frag splits... */
430  __le32 by; /* ...by this many bits */
431 } __attribute__ ((packed));
432 
433 struct ceph_frag_tree_head {
434  __le32 nsplits; /* num ceph_frag_tree_split records */
435  struct ceph_frag_tree_split splits[];
436 } __attribute__ ((packed));
437 
438 /* capability issue, for bundling with mds reply */
439 struct ceph_mds_reply_cap {
440  __le32 caps, wanted; /* caps issued, wanted */
441  __le64 cap_id;
442  __le32 seq, mseq;
443  __le64 realm; /* snap realm */
444  __u8 flags; /* CEPH_CAP_FLAG_* */
445 } __attribute__ ((packed));
446 
447 #define CEPH_CAP_FLAG_AUTH 1 /* cap is issued by auth mds */
448 
449 /* inode record, for bundling with mds reply */
450 struct ceph_mds_reply_inode {
451  __le64 ino;
452  __le64 snapid;
453  __le32 rdev;
454  __le64 version; /* inode version */
455  __le64 xattr_version; /* version for xattr blob */
456  struct ceph_mds_reply_cap cap; /* caps issued for this inode */
457  struct ceph_file_layout layout;
458  struct ceph_timespec ctime, mtime, atime;
459  __le32 time_warp_seq;
460  __le64 size, max_size, truncate_size;
461  __le32 truncate_seq;
462  __le32 mode, uid, gid;
463  __le32 nlink;
464  __le64 files, subdirs, rbytes, rfiles, rsubdirs; /* dir stats */
465  struct ceph_timespec rctime;
466  struct ceph_frag_tree_head fragtree; /* (must be at end of struct) */
467 } __attribute__ ((packed));
468 /* followed by frag array, symlink string, dir layout, xattr blob */
469 
470 /* reply_lease follows dname, and reply_inode */
471 struct ceph_mds_reply_lease {
472  __le16 mask; /* lease type(s) */
473  __le32 duration_ms; /* lease duration */
474  __le32 seq;
475 } __attribute__ ((packed));
476 
477 struct ceph_mds_reply_dirfrag {
478  __le32 frag; /* fragment */
479  __le32 auth; /* auth mds, if this is a delegation point */
480  __le32 ndist; /* number of mds' this is replicated on */
481  __le32 dist[];
482 } __attribute__ ((packed));
483 
484 #define CEPH_LOCK_FCNTL 1
485 #define CEPH_LOCK_FLOCK 2
486 
487 #define CEPH_LOCK_SHARED 1
488 #define CEPH_LOCK_EXCL 2
489 #define CEPH_LOCK_UNLOCK 4
490 
491 struct ceph_filelock {
492  __le64 start;/* file offset to start lock at */
493  __le64 length; /* num bytes to lock; 0 for all following start */
494  __le64 client; /* which client holds the lock */
495  __le64 pid; /* process id holding the lock on the client */
496  __le64 pid_namespace;
497  __u8 type; /* shared lock, exclusive lock, or unlock */
498 } __attribute__ ((packed));
499 
500 
501 /* file access modes */
502 #define CEPH_FILE_MODE_PIN 0
503 #define CEPH_FILE_MODE_RD 1
504 #define CEPH_FILE_MODE_WR 2
505 #define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
506 #define CEPH_FILE_MODE_LAZY 4 /* lazy io */
507 #define CEPH_FILE_MODE_NUM 8 /* bc these are bit fields.. mostly */
508 
509 int ceph_flags_to_mode(int flags);
510 
511 
512 /* capability bits */
513 #define CEPH_CAP_PIN 1 /* no specific capabilities beyond the pin */
514 
515 /* generic cap bits */
516 #define CEPH_CAP_GSHARED 1 /* client can reads */
517 #define CEPH_CAP_GEXCL 2 /* client can read and update */
518 #define CEPH_CAP_GCACHE 4 /* (file) client can cache reads */
519 #define CEPH_CAP_GRD 8 /* (file) client can read */
520 #define CEPH_CAP_GWR 16 /* (file) client can write */
521 #define CEPH_CAP_GBUFFER 32 /* (file) client can buffer writes */
522 #define CEPH_CAP_GWREXTEND 64 /* (file) client can extend EOF */
523 #define CEPH_CAP_GLAZYIO 128 /* (file) client can perform lazy io */
524 
525 /* per-lock shift */
526 #define CEPH_CAP_SAUTH 2
527 #define CEPH_CAP_SLINK 4
528 #define CEPH_CAP_SXATTR 6
529 #define CEPH_CAP_SFILE 8
530 #define CEPH_CAP_SFLOCK 20
531 
532 #define CEPH_CAP_BITS 22
533 
534 /* composed values */
535 #define CEPH_CAP_AUTH_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SAUTH)
536 #define CEPH_CAP_AUTH_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SAUTH)
537 #define CEPH_CAP_LINK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SLINK)
538 #define CEPH_CAP_LINK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SLINK)
539 #define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SXATTR)
540 #define CEPH_CAP_XATTR_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SXATTR)
541 #define CEPH_CAP_FILE(x) (x << CEPH_CAP_SFILE)
542 #define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
543 #define CEPH_CAP_FILE_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFILE)
544 #define CEPH_CAP_FILE_CACHE (CEPH_CAP_GCACHE << CEPH_CAP_SFILE)
545 #define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)
546 #define CEPH_CAP_FILE_WR (CEPH_CAP_GWR << CEPH_CAP_SFILE)
547 #define CEPH_CAP_FILE_BUFFER (CEPH_CAP_GBUFFER << CEPH_CAP_SFILE)
548 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
549 #define CEPH_CAP_FILE_LAZYIO (CEPH_CAP_GLAZYIO << CEPH_CAP_SFILE)
550 #define CEPH_CAP_FLOCK_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFLOCK)
551 #define CEPH_CAP_FLOCK_EXCL (CEPH_CAP_GEXCL << CEPH_CAP_SFLOCK)
552 
553 
554 /* cap masks (for getattr) */
555 #define CEPH_STAT_CAP_INODE CEPH_CAP_PIN
556 #define CEPH_STAT_CAP_TYPE CEPH_CAP_PIN /* mode >> 12 */
557 #define CEPH_STAT_CAP_SYMLINK CEPH_CAP_PIN
558 #define CEPH_STAT_CAP_UID CEPH_CAP_AUTH_SHARED
559 #define CEPH_STAT_CAP_GID CEPH_CAP_AUTH_SHARED
560 #define CEPH_STAT_CAP_MODE CEPH_CAP_AUTH_SHARED
561 #define CEPH_STAT_CAP_NLINK CEPH_CAP_LINK_SHARED
562 #define CEPH_STAT_CAP_LAYOUT CEPH_CAP_FILE_SHARED
563 #define CEPH_STAT_CAP_MTIME CEPH_CAP_FILE_SHARED
564 #define CEPH_STAT_CAP_SIZE CEPH_CAP_FILE_SHARED
565 #define CEPH_STAT_CAP_ATIME CEPH_CAP_FILE_SHARED /* fixme */
566 #define CEPH_STAT_CAP_XATTR CEPH_CAP_XATTR_SHARED
567 #define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN | \
568  CEPH_CAP_AUTH_SHARED | \
569  CEPH_CAP_LINK_SHARED | \
570  CEPH_CAP_FILE_SHARED | \
571  CEPH_CAP_XATTR_SHARED)
572 
573 #define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED | \
574  CEPH_CAP_LINK_SHARED | \
575  CEPH_CAP_XATTR_SHARED | \
576  CEPH_CAP_FILE_SHARED)
577 #define CEPH_CAP_ANY_RD (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD | \
578  CEPH_CAP_FILE_CACHE)
579 
580 #define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL | \
581  CEPH_CAP_LINK_EXCL | \
582  CEPH_CAP_XATTR_EXCL | \
583  CEPH_CAP_FILE_EXCL)
584 #define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
585  CEPH_CAP_FILE_EXCL)
586 #define CEPH_CAP_ANY_WR (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
587 #define CEPH_CAP_ANY (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
588  CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
589  CEPH_CAP_PIN)
590 
591 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
592  CEPH_LOCK_IXATTR)
593 
594 int ceph_caps_for_mode(int mode);
595 
596 enum {
597  CEPH_CAP_OP_GRANT, /* mds->client grant */
598  CEPH_CAP_OP_REVOKE, /* mds->client revoke */
599  CEPH_CAP_OP_TRUNC, /* mds->client trunc notify */
600  CEPH_CAP_OP_EXPORT, /* mds has exported the cap */
601  CEPH_CAP_OP_IMPORT, /* mds has imported the cap */
602  CEPH_CAP_OP_UPDATE, /* client->mds update */
603  CEPH_CAP_OP_DROP, /* client->mds drop cap bits */
604  CEPH_CAP_OP_FLUSH, /* client->mds cap writeback */
605  CEPH_CAP_OP_FLUSH_ACK, /* mds->client flushed */
606  CEPH_CAP_OP_FLUSHSNAP, /* client->mds flush snapped metadata */
607  CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
608  CEPH_CAP_OP_RELEASE, /* client->mds release (clean) cap */
609  CEPH_CAP_OP_RENEW, /* client->mds renewal request */
610 };
611 
612 extern const char *ceph_cap_op_name(int op);
613 
614 /*
615  * caps message, used for capability callbacks, acks, requests, etc.
616  */
617 struct ceph_mds_caps {
618  __le32 op; /* CEPH_CAP_OP_* */
619  __le64 ino, realm;
620  __le64 cap_id;
621  __le32 seq, issue_seq;
622  __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
623  __le32 migrate_seq;
624  __le64 snap_follows;
625  __le32 snap_trace_len;
626 
627  /* authlock */
628  __le32 uid, gid, mode;
629 
630  /* linklock */
631  __le32 nlink;
632 
633  /* xattrlock */
634  __le32 xattr_len;
635  __le64 xattr_version;
636 
637  /* filelock */
638  __le64 size, max_size, truncate_size;
639  __le32 truncate_seq;
640  struct ceph_timespec mtime, atime, ctime;
641  struct ceph_file_layout layout;
642  __le32 time_warp_seq;
643 } __attribute__ ((packed));
644 
645 /* cap release msg head */
646 struct ceph_mds_cap_release {
647  __le32 num; /* number of cap_items that follow */
648 } __attribute__ ((packed));
649 
650 struct ceph_mds_cap_item {
651  __le64 ino;
652  __le64 cap_id;
653  __le32 migrate_seq, seq;
654 } __attribute__ ((packed));
655 
656 #define CEPH_MDS_LEASE_REVOKE 1 /* mds -> client */
657 #define CEPH_MDS_LEASE_RELEASE 2 /* client -> mds */
658 #define CEPH_MDS_LEASE_RENEW 3 /* client <-> mds */
659 #define CEPH_MDS_LEASE_REVOKE_ACK 4 /* client -> mds */
660 
661 extern const char *ceph_lease_op_name(int o);
662 
663 /* lease msg header */
664 struct ceph_mds_lease {
665  __u8 action; /* CEPH_MDS_LEASE_* */
666  __le16 mask; /* which lease */
667  __le64 ino;
668  __le64 first, last; /* snap range */
669  __le32 seq;
670  __le32 duration_ms; /* duration of renewal */
671 } __attribute__ ((packed));
672 /* followed by a __le32+string for dname */
673 
674 /* client reconnect */
675 struct ceph_mds_cap_reconnect {
676  __le64 cap_id;
677  __le32 wanted;
678  __le32 issued;
679  __le64 snaprealm;
680  __le64 pathbase; /* base ino for our path to this ino */
681  __le32 flock_len; /* size of flock state blob, if any */
682 } __attribute__ ((packed));
683 /* followed by flock blob */
684 
685 struct ceph_mds_cap_reconnect_v1 {
686  __le64 cap_id;
687  __le32 wanted;
688  __le32 issued;
689  __le64 size;
690  struct ceph_timespec mtime, atime;
691  __le64 snaprealm;
692  __le64 pathbase; /* base ino for our path to this ino */
693 } __attribute__ ((packed));
694 
695 struct ceph_mds_snaprealm_reconnect {
696  __le64 ino; /* snap realm base */
697  __le64 seq; /* snap seq for this snap realm */
698  __le64 parent; /* parent realm */
699 } __attribute__ ((packed));
700 
701 /*
702  * snaps
703  */
704 enum {
705  CEPH_SNAP_OP_UPDATE, /* CREATE or DESTROY */
706  CEPH_SNAP_OP_CREATE,
707  CEPH_SNAP_OP_DESTROY,
708  CEPH_SNAP_OP_SPLIT,
709 };
710 
711 extern const char *ceph_snap_op_name(int o);
712 
713 /* snap msg header */
714 struct ceph_mds_snap_head {
715  __le32 op; /* CEPH_SNAP_OP_* */
716  __le64 split; /* ino to split off, if any */
717  __le32 num_split_inos; /* # inos belonging to new child realm */
718  __le32 num_split_realms; /* # child realms udner new child realm */
719  __le32 trace_len; /* size of snap trace blob */
720 } __attribute__ ((packed));
721 /* followed by split ino list, then split realms, then the trace blob */
722 
723 /*
724  * encode info about a snaprealm, as viewed by a client
725  */
726 struct ceph_mds_snap_realm {
727  __le64 ino; /* ino */
728  __le64 created; /* snap: when created */
729  __le64 parent; /* ino: parent realm */
730  __le64 parent_since; /* snap: same parent since */
731  __le64 seq; /* snap: version */
732  __le32 num_snaps;
733  __le32 num_prior_parent_snaps;
734 } __attribute__ ((packed));
735 /* followed by my snap list, then prior parent snap list */
736 
737 #endif
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