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TOMOYO Linux Cross Reference
Linux/include/linux/ceph/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_OSDC_PROTOCOL   24 /* server/client */
 25 #define CEPH_MDSC_PROTOCOL   32 /* server/client */
 26 #define CEPH_MONC_PROTOCOL   15 /* server/client */
 27 
 28 
 29 #define CEPH_INO_ROOT   1
 30 #define CEPH_INO_CEPH   2       /* hidden .ceph dir */
 31 #define CEPH_INO_DOTDOT 3       /* used by ceph fuse for parent (..) */
 32 
 33 /* arbitrary limit on max # of monitors (cluster of 3 is typical) */
 34 #define CEPH_MAX_MON   31
 35 
 36 /*
 37  * ceph_file_layout - describe data layout for a file/inode
 38  */
 39 struct ceph_file_layout {
 40         /* file -> object mapping */
 41         __le32 fl_stripe_unit;     /* stripe unit, in bytes.  must be multiple
 42                                       of page size. */
 43         __le32 fl_stripe_count;    /* over this many objects */
 44         __le32 fl_object_size;     /* until objects are this big, then move to
 45                                       new objects */
 46         __le32 fl_cas_hash;        /* UNUSED.  0 = none; 1 = sha256 */
 47 
 48         /* pg -> disk layout */
 49         __le32 fl_object_stripe_unit;  /* UNUSED.  for per-object parity, if any */
 50 
 51         /* object -> pg layout */
 52         __le32 fl_unused;       /* unused; used to be preferred primary for pg (-1 for none) */
 53         __le32 fl_pg_pool;      /* namespace, crush ruleset, rep level */
 54 } __attribute__ ((packed));
 55 
 56 #define CEPH_MIN_STRIPE_UNIT 65536
 57 
 58 int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
 59 
 60 struct ceph_dir_layout {
 61         __u8   dl_dir_hash;   /* see ceph_hash.h for ids */
 62         __u8   dl_unused1;
 63         __u16  dl_unused2;
 64         __u32  dl_unused3;
 65 } __attribute__ ((packed));
 66 
 67 /* crypto algorithms */
 68 #define CEPH_CRYPTO_NONE 0x0
 69 #define CEPH_CRYPTO_AES  0x1
 70 
 71 #define CEPH_AES_IV "cephsageyudagreg"
 72 
 73 /* security/authentication protocols */
 74 #define CEPH_AUTH_UNKNOWN       0x0
 75 #define CEPH_AUTH_NONE          0x1
 76 #define CEPH_AUTH_CEPHX         0x2
 77 
 78 #define CEPH_AUTH_UID_DEFAULT ((__u64) -1)
 79 
 80 
 81 /*********************************************
 82  * message layer
 83  */
 84 
 85 /*
 86  * message types
 87  */
 88 
 89 /* misc */
 90 #define CEPH_MSG_SHUTDOWN               1
 91 #define CEPH_MSG_PING                   2
 92 
 93 /* client <-> monitor */
 94 #define CEPH_MSG_MON_MAP                4
 95 #define CEPH_MSG_MON_GET_MAP            5
 96 #define CEPH_MSG_STATFS                 13
 97 #define CEPH_MSG_STATFS_REPLY           14
 98 #define CEPH_MSG_MON_SUBSCRIBE          15
 99 #define CEPH_MSG_MON_SUBSCRIBE_ACK      16
100 #define CEPH_MSG_AUTH                   17
101 #define CEPH_MSG_AUTH_REPLY             18
102 #define CEPH_MSG_MON_GET_VERSION        19
103 #define CEPH_MSG_MON_GET_VERSION_REPLY  20
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  * mdsmap flags
225  */
226 #define CEPH_MDSMAP_DOWN    (1<<0)  /* cluster deliberately down */
227 
228 /*
229  * mds states
230  *   > 0 -> in
231  *  <= 0 -> out
232  */
233 #define CEPH_MDS_STATE_DNE          0  /* down, does not exist. */
234 #define CEPH_MDS_STATE_STOPPED     -1  /* down, once existed, but no subtrees.
235                                           empty log. */
236 #define CEPH_MDS_STATE_BOOT        -4  /* up, boot announcement. */
237 #define CEPH_MDS_STATE_STANDBY     -5  /* up, idle.  waiting for assignment. */
238 #define CEPH_MDS_STATE_CREATING    -6  /* up, creating MDS instance. */
239 #define CEPH_MDS_STATE_STARTING    -7  /* up, starting previously stopped mds */
240 #define CEPH_MDS_STATE_STANDBY_REPLAY -8 /* up, tailing active node's journal */
241 #define CEPH_MDS_STATE_REPLAYONCE   -9 /* up, replaying an active node's journal */
242 
243 #define CEPH_MDS_STATE_REPLAY       8  /* up, replaying journal. */
244 #define CEPH_MDS_STATE_RESOLVE      9  /* up, disambiguating distributed
245                                           operations (import, rename, etc.) */
246 #define CEPH_MDS_STATE_RECONNECT    10 /* up, reconnect to clients */
247 #define CEPH_MDS_STATE_REJOIN       11 /* up, rejoining distributed cache */
248 #define CEPH_MDS_STATE_CLIENTREPLAY 12 /* up, replaying client operations */
249 #define CEPH_MDS_STATE_ACTIVE       13 /* up, active */
250 #define CEPH_MDS_STATE_STOPPING     14 /* up, but exporting metadata */
251 
252 extern const char *ceph_mds_state_name(int s);
253 
254 
255 /*
256  * metadata lock types.
257  *  - these are bitmasks.. we can compose them
258  *  - they also define the lock ordering by the MDS
259  *  - a few of these are internal to the mds
260  */
261 #define CEPH_LOCK_DVERSION    1
262 #define CEPH_LOCK_DN          2
263 #define CEPH_LOCK_ISNAP       16
264 #define CEPH_LOCK_IVERSION    32    /* mds internal */
265 #define CEPH_LOCK_IFILE       64
266 #define CEPH_LOCK_IAUTH       128
267 #define CEPH_LOCK_ILINK       256
268 #define CEPH_LOCK_IDFT        512   /* dir frag tree */
269 #define CEPH_LOCK_INEST       1024  /* mds internal */
270 #define CEPH_LOCK_IXATTR      2048
271 #define CEPH_LOCK_IFLOCK      4096  /* advisory file locks */
272 #define CEPH_LOCK_INO         8192  /* immutable inode bits; not a lock */
273 #define CEPH_LOCK_IPOLICY     16384 /* policy lock on dirs. MDS internal */
274 
275 /* client_session ops */
276 enum {
277         CEPH_SESSION_REQUEST_OPEN,
278         CEPH_SESSION_OPEN,
279         CEPH_SESSION_REQUEST_CLOSE,
280         CEPH_SESSION_CLOSE,
281         CEPH_SESSION_REQUEST_RENEWCAPS,
282         CEPH_SESSION_RENEWCAPS,
283         CEPH_SESSION_STALE,
284         CEPH_SESSION_RECALL_STATE,
285 };
286 
287 extern const char *ceph_session_op_name(int op);
288 
289 struct ceph_mds_session_head {
290         __le32 op;
291         __le64 seq;
292         struct ceph_timespec stamp;
293         __le32 max_caps, max_leases;
294 } __attribute__ ((packed));
295 
296 /* client_request */
297 /*
298  * metadata ops.
299  *  & 0x001000 -> write op
300  *  & 0x010000 -> follow symlink (e.g. stat(), not lstat()).
301  &  & 0x100000 -> use weird ino/path trace
302  */
303 #define CEPH_MDS_OP_WRITE        0x001000
304 enum {
305         CEPH_MDS_OP_LOOKUP     = 0x00100,
306         CEPH_MDS_OP_GETATTR    = 0x00101,
307         CEPH_MDS_OP_LOOKUPHASH = 0x00102,
308         CEPH_MDS_OP_LOOKUPPARENT = 0x00103,
309         CEPH_MDS_OP_LOOKUPINO  = 0x00104,
310 
311         CEPH_MDS_OP_SETXATTR   = 0x01105,
312         CEPH_MDS_OP_RMXATTR    = 0x01106,
313         CEPH_MDS_OP_SETLAYOUT  = 0x01107,
314         CEPH_MDS_OP_SETATTR    = 0x01108,
315         CEPH_MDS_OP_SETFILELOCK= 0x01109,
316         CEPH_MDS_OP_GETFILELOCK= 0x00110,
317         CEPH_MDS_OP_SETDIRLAYOUT=0x0110a,
318 
319         CEPH_MDS_OP_MKNOD      = 0x01201,
320         CEPH_MDS_OP_LINK       = 0x01202,
321         CEPH_MDS_OP_UNLINK     = 0x01203,
322         CEPH_MDS_OP_RENAME     = 0x01204,
323         CEPH_MDS_OP_MKDIR      = 0x01220,
324         CEPH_MDS_OP_RMDIR      = 0x01221,
325         CEPH_MDS_OP_SYMLINK    = 0x01222,
326 
327         CEPH_MDS_OP_CREATE     = 0x01301,
328         CEPH_MDS_OP_OPEN       = 0x00302,
329         CEPH_MDS_OP_READDIR    = 0x00305,
330 
331         CEPH_MDS_OP_LOOKUPSNAP = 0x00400,
332         CEPH_MDS_OP_MKSNAP     = 0x01400,
333         CEPH_MDS_OP_RMSNAP     = 0x01401,
334         CEPH_MDS_OP_LSSNAP     = 0x00402,
335 };
336 
337 extern const char *ceph_mds_op_name(int op);
338 
339 
340 #define CEPH_SETATTR_MODE   1
341 #define CEPH_SETATTR_UID    2
342 #define CEPH_SETATTR_GID    4
343 #define CEPH_SETATTR_MTIME  8
344 #define CEPH_SETATTR_ATIME 16
345 #define CEPH_SETATTR_SIZE  32
346 #define CEPH_SETATTR_CTIME 64
347 
348 /*
349  * Ceph setxattr request flags.
350  */
351 #define CEPH_XATTR_CREATE  1
352 #define CEPH_XATTR_REPLACE 2
353 
354 union ceph_mds_request_args {
355         struct {
356                 __le32 mask;                 /* CEPH_CAP_* */
357         } __attribute__ ((packed)) getattr;
358         struct {
359                 __le32 mode;
360                 __le32 uid;
361                 __le32 gid;
362                 struct ceph_timespec mtime;
363                 struct ceph_timespec atime;
364                 __le64 size, old_size;       /* old_size needed by truncate */
365                 __le32 mask;                 /* CEPH_SETATTR_* */
366         } __attribute__ ((packed)) setattr;
367         struct {
368                 __le32 frag;                 /* which dir fragment */
369                 __le32 max_entries;          /* how many dentries to grab */
370                 __le32 max_bytes;
371         } __attribute__ ((packed)) readdir;
372         struct {
373                 __le32 mode;
374                 __le32 rdev;
375         } __attribute__ ((packed)) mknod;
376         struct {
377                 __le32 mode;
378         } __attribute__ ((packed)) mkdir;
379         struct {
380                 __le32 flags;
381                 __le32 mode;
382                 __le32 stripe_unit;          /* layout for newly created file */
383                 __le32 stripe_count;         /* ... */
384                 __le32 object_size;
385                 __le32 file_replication;
386                 __le32 unused;               /* used to be preferred osd */
387         } __attribute__ ((packed)) open;
388         struct {
389                 __le32 flags;
390         } __attribute__ ((packed)) setxattr;
391         struct {
392                 struct ceph_file_layout layout;
393         } __attribute__ ((packed)) setlayout;
394         struct {
395                 __u8 rule; /* currently fcntl or flock */
396                 __u8 type; /* shared, exclusive, remove*/
397                 __le64 pid; /* process id requesting the lock */
398                 __le64 pid_namespace;
399                 __le64 start; /* initial location to lock */
400                 __le64 length; /* num bytes to lock from start */
401                 __u8 wait; /* will caller wait for lock to become available? */
402         } __attribute__ ((packed)) filelock_change;
403 } __attribute__ ((packed));
404 
405 #define CEPH_MDS_FLAG_REPLAY        1  /* this is a replayed op */
406 #define CEPH_MDS_FLAG_WANT_DENTRY   2  /* want dentry in reply */
407 
408 struct ceph_mds_request_head {
409         __le64 oldest_client_tid;
410         __le32 mdsmap_epoch;           /* on client */
411         __le32 flags;                  /* CEPH_MDS_FLAG_* */
412         __u8 num_retry, num_fwd;       /* count retry, fwd attempts */
413         __le16 num_releases;           /* # include cap/lease release records */
414         __le32 op;                     /* mds op code */
415         __le32 caller_uid, caller_gid;
416         __le64 ino;                    /* use this ino for openc, mkdir, mknod,
417                                           etc. (if replaying) */
418         union ceph_mds_request_args args;
419 } __attribute__ ((packed));
420 
421 /* cap/lease release record */
422 struct ceph_mds_request_release {
423         __le64 ino, cap_id;            /* ino and unique cap id */
424         __le32 caps, wanted;           /* new issued, wanted */
425         __le32 seq, issue_seq, mseq;
426         __le32 dname_seq;              /* if releasing a dentry lease, a */
427         __le32 dname_len;              /* string follows. */
428 } __attribute__ ((packed));
429 
430 /* client reply */
431 struct ceph_mds_reply_head {
432         __le32 op;
433         __le32 result;
434         __le32 mdsmap_epoch;
435         __u8 safe;                     /* true if committed to disk */
436         __u8 is_dentry, is_target;     /* true if dentry, target inode records
437                                           are included with reply */
438 } __attribute__ ((packed));
439 
440 /* one for each node split */
441 struct ceph_frag_tree_split {
442         __le32 frag;                   /* this frag splits... */
443         __le32 by;                     /* ...by this many bits */
444 } __attribute__ ((packed));
445 
446 struct ceph_frag_tree_head {
447         __le32 nsplits;                /* num ceph_frag_tree_split records */
448         struct ceph_frag_tree_split splits[];
449 } __attribute__ ((packed));
450 
451 /* capability issue, for bundling with mds reply */
452 struct ceph_mds_reply_cap {
453         __le32 caps, wanted;           /* caps issued, wanted */
454         __le64 cap_id;
455         __le32 seq, mseq;
456         __le64 realm;                  /* snap realm */
457         __u8 flags;                    /* CEPH_CAP_FLAG_* */
458 } __attribute__ ((packed));
459 
460 #define CEPH_CAP_FLAG_AUTH  1          /* cap is issued by auth mds */
461 
462 /* inode record, for bundling with mds reply */
463 struct ceph_mds_reply_inode {
464         __le64 ino;
465         __le64 snapid;
466         __le32 rdev;
467         __le64 version;                /* inode version */
468         __le64 xattr_version;          /* version for xattr blob */
469         struct ceph_mds_reply_cap cap; /* caps issued for this inode */
470         struct ceph_file_layout layout;
471         struct ceph_timespec ctime, mtime, atime;
472         __le32 time_warp_seq;
473         __le64 size, max_size, truncate_size;
474         __le32 truncate_seq;
475         __le32 mode, uid, gid;
476         __le32 nlink;
477         __le64 files, subdirs, rbytes, rfiles, rsubdirs;  /* dir stats */
478         struct ceph_timespec rctime;
479         struct ceph_frag_tree_head fragtree;  /* (must be at end of struct) */
480 } __attribute__ ((packed));
481 /* followed by frag array, symlink string, dir layout, xattr blob */
482 
483 /* reply_lease follows dname, and reply_inode */
484 struct ceph_mds_reply_lease {
485         __le16 mask;            /* lease type(s) */
486         __le32 duration_ms;     /* lease duration */
487         __le32 seq;
488 } __attribute__ ((packed));
489 
490 struct ceph_mds_reply_dirfrag {
491         __le32 frag;            /* fragment */
492         __le32 auth;            /* auth mds, if this is a delegation point */
493         __le32 ndist;           /* number of mds' this is replicated on */
494         __le32 dist[];
495 } __attribute__ ((packed));
496 
497 #define CEPH_LOCK_FCNTL    1
498 #define CEPH_LOCK_FLOCK    2
499 
500 #define CEPH_LOCK_SHARED   1
501 #define CEPH_LOCK_EXCL     2
502 #define CEPH_LOCK_UNLOCK   4
503 
504 struct ceph_filelock {
505         __le64 start;/* file offset to start lock at */
506         __le64 length; /* num bytes to lock; 0 for all following start */
507         __le64 client; /* which client holds the lock */
508         __le64 pid; /* process id holding the lock on the client */
509         __le64 pid_namespace;
510         __u8 type; /* shared lock, exclusive lock, or unlock */
511 } __attribute__ ((packed));
512 
513 
514 /* file access modes */
515 #define CEPH_FILE_MODE_PIN        0
516 #define CEPH_FILE_MODE_RD         1
517 #define CEPH_FILE_MODE_WR         2
518 #define CEPH_FILE_MODE_RDWR       3  /* RD | WR */
519 #define CEPH_FILE_MODE_LAZY       4  /* lazy io */
520 #define CEPH_FILE_MODE_NUM        8  /* bc these are bit fields.. mostly */
521 
522 int ceph_flags_to_mode(int flags);
523 
524 
525 /* capability bits */
526 #define CEPH_CAP_PIN         1  /* no specific capabilities beyond the pin */
527 
528 /* generic cap bits */
529 #define CEPH_CAP_GSHARED     1  /* client can reads */
530 #define CEPH_CAP_GEXCL       2  /* client can read and update */
531 #define CEPH_CAP_GCACHE      4  /* (file) client can cache reads */
532 #define CEPH_CAP_GRD         8  /* (file) client can read */
533 #define CEPH_CAP_GWR        16  /* (file) client can write */
534 #define CEPH_CAP_GBUFFER    32  /* (file) client can buffer writes */
535 #define CEPH_CAP_GWREXTEND  64  /* (file) client can extend EOF */
536 #define CEPH_CAP_GLAZYIO   128  /* (file) client can perform lazy io */
537 
538 #define CEPH_CAP_SIMPLE_BITS  2
539 #define CEPH_CAP_FILE_BITS    8
540 
541 /* per-lock shift */
542 #define CEPH_CAP_SAUTH      2
543 #define CEPH_CAP_SLINK      4
544 #define CEPH_CAP_SXATTR     6
545 #define CEPH_CAP_SFILE      8
546 #define CEPH_CAP_SFLOCK    20
547 
548 #define CEPH_CAP_BITS      22
549 
550 /* composed values */
551 #define CEPH_CAP_AUTH_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SAUTH)
552 #define CEPH_CAP_AUTH_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SAUTH)
553 #define CEPH_CAP_LINK_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SLINK)
554 #define CEPH_CAP_LINK_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SLINK)
555 #define CEPH_CAP_XATTR_SHARED (CEPH_CAP_GSHARED  << CEPH_CAP_SXATTR)
556 #define CEPH_CAP_XATTR_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SXATTR)
557 #define CEPH_CAP_FILE(x)    (x << CEPH_CAP_SFILE)
558 #define CEPH_CAP_FILE_SHARED   (CEPH_CAP_GSHARED   << CEPH_CAP_SFILE)
559 #define CEPH_CAP_FILE_EXCL     (CEPH_CAP_GEXCL     << CEPH_CAP_SFILE)
560 #define CEPH_CAP_FILE_CACHE    (CEPH_CAP_GCACHE    << CEPH_CAP_SFILE)
561 #define CEPH_CAP_FILE_RD       (CEPH_CAP_GRD       << CEPH_CAP_SFILE)
562 #define CEPH_CAP_FILE_WR       (CEPH_CAP_GWR       << CEPH_CAP_SFILE)
563 #define CEPH_CAP_FILE_BUFFER   (CEPH_CAP_GBUFFER   << CEPH_CAP_SFILE)
564 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
565 #define CEPH_CAP_FILE_LAZYIO   (CEPH_CAP_GLAZYIO   << CEPH_CAP_SFILE)
566 #define CEPH_CAP_FLOCK_SHARED  (CEPH_CAP_GSHARED   << CEPH_CAP_SFLOCK)
567 #define CEPH_CAP_FLOCK_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SFLOCK)
568 
569 
570 /* cap masks (for getattr) */
571 #define CEPH_STAT_CAP_INODE    CEPH_CAP_PIN
572 #define CEPH_STAT_CAP_TYPE     CEPH_CAP_PIN  /* mode >> 12 */
573 #define CEPH_STAT_CAP_SYMLINK  CEPH_CAP_PIN
574 #define CEPH_STAT_CAP_UID      CEPH_CAP_AUTH_SHARED
575 #define CEPH_STAT_CAP_GID      CEPH_CAP_AUTH_SHARED
576 #define CEPH_STAT_CAP_MODE     CEPH_CAP_AUTH_SHARED
577 #define CEPH_STAT_CAP_NLINK    CEPH_CAP_LINK_SHARED
578 #define CEPH_STAT_CAP_LAYOUT   CEPH_CAP_FILE_SHARED
579 #define CEPH_STAT_CAP_MTIME    CEPH_CAP_FILE_SHARED
580 #define CEPH_STAT_CAP_SIZE     CEPH_CAP_FILE_SHARED
581 #define CEPH_STAT_CAP_ATIME    CEPH_CAP_FILE_SHARED  /* fixme */
582 #define CEPH_STAT_CAP_XATTR    CEPH_CAP_XATTR_SHARED
583 #define CEPH_STAT_CAP_INODE_ALL (CEPH_CAP_PIN |                 \
584                                  CEPH_CAP_AUTH_SHARED | \
585                                  CEPH_CAP_LINK_SHARED | \
586                                  CEPH_CAP_FILE_SHARED | \
587                                  CEPH_CAP_XATTR_SHARED)
588 
589 #define CEPH_CAP_ANY_SHARED (CEPH_CAP_AUTH_SHARED |                     \
590                               CEPH_CAP_LINK_SHARED |                    \
591                               CEPH_CAP_XATTR_SHARED |                   \
592                               CEPH_CAP_FILE_SHARED)
593 #define CEPH_CAP_ANY_RD   (CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_RD |     \
594                            CEPH_CAP_FILE_CACHE)
595 
596 #define CEPH_CAP_ANY_EXCL (CEPH_CAP_AUTH_EXCL |         \
597                            CEPH_CAP_LINK_EXCL |         \
598                            CEPH_CAP_XATTR_EXCL |        \
599                            CEPH_CAP_FILE_EXCL)
600 #define CEPH_CAP_ANY_FILE_WR (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | \
601                               CEPH_CAP_FILE_EXCL)
602 #define CEPH_CAP_ANY_WR   (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
603 #define CEPH_CAP_ANY      (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
604                            CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
605                            CEPH_CAP_PIN)
606 
607 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
608                         CEPH_LOCK_IXATTR)
609 
610 int ceph_caps_for_mode(int mode);
611 
612 enum {
613         CEPH_CAP_OP_GRANT,         /* mds->client grant */
614         CEPH_CAP_OP_REVOKE,        /* mds->client revoke */
615         CEPH_CAP_OP_TRUNC,         /* mds->client trunc notify */
616         CEPH_CAP_OP_EXPORT,        /* mds has exported the cap */
617         CEPH_CAP_OP_IMPORT,        /* mds has imported the cap */
618         CEPH_CAP_OP_UPDATE,        /* client->mds update */
619         CEPH_CAP_OP_DROP,          /* client->mds drop cap bits */
620         CEPH_CAP_OP_FLUSH,         /* client->mds cap writeback */
621         CEPH_CAP_OP_FLUSH_ACK,     /* mds->client flushed */
622         CEPH_CAP_OP_FLUSHSNAP,     /* client->mds flush snapped metadata */
623         CEPH_CAP_OP_FLUSHSNAP_ACK, /* mds->client flushed snapped metadata */
624         CEPH_CAP_OP_RELEASE,       /* client->mds release (clean) cap */
625         CEPH_CAP_OP_RENEW,         /* client->mds renewal request */
626 };
627 
628 extern const char *ceph_cap_op_name(int op);
629 
630 /*
631  * caps message, used for capability callbacks, acks, requests, etc.
632  */
633 struct ceph_mds_caps {
634         __le32 op;                  /* CEPH_CAP_OP_* */
635         __le64 ino, realm;
636         __le64 cap_id;
637         __le32 seq, issue_seq;
638         __le32 caps, wanted, dirty; /* latest issued/wanted/dirty */
639         __le32 migrate_seq;
640         __le64 snap_follows;
641         __le32 snap_trace_len;
642 
643         /* authlock */
644         __le32 uid, gid, mode;
645 
646         /* linklock */
647         __le32 nlink;
648 
649         /* xattrlock */
650         __le32 xattr_len;
651         __le64 xattr_version;
652 
653         /* filelock */
654         __le64 size, max_size, truncate_size;
655         __le32 truncate_seq;
656         struct ceph_timespec mtime, atime, ctime;
657         struct ceph_file_layout layout;
658         __le32 time_warp_seq;
659 } __attribute__ ((packed));
660 
661 /* cap release msg head */
662 struct ceph_mds_cap_release {
663         __le32 num;                /* number of cap_items that follow */
664 } __attribute__ ((packed));
665 
666 struct ceph_mds_cap_item {
667         __le64 ino;
668         __le64 cap_id;
669         __le32 migrate_seq, seq;
670 } __attribute__ ((packed));
671 
672 #define CEPH_MDS_LEASE_REVOKE           1  /*    mds  -> client */
673 #define CEPH_MDS_LEASE_RELEASE          2  /* client  -> mds    */
674 #define CEPH_MDS_LEASE_RENEW            3  /* client <-> mds    */
675 #define CEPH_MDS_LEASE_REVOKE_ACK       4  /* client  -> mds    */
676 
677 extern const char *ceph_lease_op_name(int o);
678 
679 /* lease msg header */
680 struct ceph_mds_lease {
681         __u8 action;            /* CEPH_MDS_LEASE_* */
682         __le16 mask;            /* which lease */
683         __le64 ino;
684         __le64 first, last;     /* snap range */
685         __le32 seq;
686         __le32 duration_ms;     /* duration of renewal */
687 } __attribute__ ((packed));
688 /* followed by a __le32+string for dname */
689 
690 /* client reconnect */
691 struct ceph_mds_cap_reconnect {
692         __le64 cap_id;
693         __le32 wanted;
694         __le32 issued;
695         __le64 snaprealm;
696         __le64 pathbase;        /* base ino for our path to this ino */
697         __le32 flock_len;       /* size of flock state blob, if any */
698 } __attribute__ ((packed));
699 /* followed by flock blob */
700 
701 struct ceph_mds_cap_reconnect_v1 {
702         __le64 cap_id;
703         __le32 wanted;
704         __le32 issued;
705         __le64 size;
706         struct ceph_timespec mtime, atime;
707         __le64 snaprealm;
708         __le64 pathbase;        /* base ino for our path to this ino */
709 } __attribute__ ((packed));
710 
711 struct ceph_mds_snaprealm_reconnect {
712         __le64 ino;     /* snap realm base */
713         __le64 seq;     /* snap seq for this snap realm */
714         __le64 parent;  /* parent realm */
715 } __attribute__ ((packed));
716 
717 /*
718  * snaps
719  */
720 enum {
721         CEPH_SNAP_OP_UPDATE,  /* CREATE or DESTROY */
722         CEPH_SNAP_OP_CREATE,
723         CEPH_SNAP_OP_DESTROY,
724         CEPH_SNAP_OP_SPLIT,
725 };
726 
727 extern const char *ceph_snap_op_name(int o);
728 
729 /* snap msg header */
730 struct ceph_mds_snap_head {
731         __le32 op;                /* CEPH_SNAP_OP_* */
732         __le64 split;             /* ino to split off, if any */
733         __le32 num_split_inos;    /* # inos belonging to new child realm */
734         __le32 num_split_realms;  /* # child realms udner new child realm */
735         __le32 trace_len;         /* size of snap trace blob */
736 } __attribute__ ((packed));
737 /* followed by split ino list, then split realms, then the trace blob */
738 
739 /*
740  * encode info about a snaprealm, as viewed by a client
741  */
742 struct ceph_mds_snap_realm {
743         __le64 ino;           /* ino */
744         __le64 created;       /* snap: when created */
745         __le64 parent;        /* ino: parent realm */
746         __le64 parent_since;  /* snap: same parent since */
747         __le64 seq;           /* snap: version */
748         __le32 num_snaps;
749         __le32 num_prior_parent_snaps;
750 } __attribute__ ((packed));
751 /* followed by my snap list, then prior parent snap list */
752 
753 #endif
754 

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