1 #ifndef _FS_CEPH_SUPER_H
2 #define _FS_CEPH_SUPER_H
4 #include <linux/ceph/ceph_debug.h>
6 #include <asm/unaligned.h>
7 #include <linux/backing-dev.h>
8 #include <linux/completion.h>
9 #include <linux/exportfs.h>
11 #include <linux/mempool.h>
12 #include <linux/pagemap.h>
13 #include <linux/wait.h>
14 #include <linux/writeback.h>
15 #include <linux/slab.h>
16 #include <linux/posix_acl.h>
17 #include <linux/refcount.h>
19 #include <linux/ceph/libceph.h>
21 #ifdef CONFIG_CEPH_FSCACHE
22 #include <linux/fscache.h>
25 /* f_type in struct statfs */
26 #define CEPH_SUPER_MAGIC 0x00c36400
28 /* large granularity for statfs utilization stats to facilitate
29 * large volume sizes on 32-bit machines. */
30 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */
31 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
33 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
34 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
35 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
36 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
37 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
38 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
39 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
40 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
42 #define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE
44 #define ceph_set_mount_opt(fsc, opt) \
45 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
46 #define ceph_test_mount_opt(fsc, opt) \
47 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
49 /* max size of osd read request, limited by libceph */
50 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
51 /* osd has a configurable limitaion of max write size.
52 * CEPH_MSG_MAX_DATA_LEN should be small enough. */
53 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
54 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */
55 #define CEPH_MAX_READDIR_DEFAULT 1024
56 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
57 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
60 * Delay telling the MDS we no longer want caps, in case we reopen
61 * the file. Delay a minimum amount of time, even if we send a cap
62 * message for some other reason. Otherwise, take the oppotunity to
63 * update the mds to avoid sending another message later.
65 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
66 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
68 struct ceph_mount_options
{
72 int wsize
; /* max write size */
73 int rsize
; /* max read size */
74 int rasize
; /* max readahead */
75 int congestion_kb
; /* max writeback in flight */
76 int caps_wanted_delay_min
, caps_wanted_delay_max
;
77 int max_readdir
; /* max readdir result (entires) */
78 int max_readdir_bytes
; /* max readdir result (bytes) */
81 * everything above this point can be memcmp'd; everything below
82 * is handled in compare_mount_options()
85 char *snapdir_name
; /* default ".snap" */
86 char *mds_namespace
; /* default NULL */
87 char *server_path
; /* default "/" */
88 char *fscache_uniq
; /* default NULL */
91 struct ceph_fs_client
{
92 struct super_block
*sb
;
94 struct ceph_mount_options
*mount_options
;
95 struct ceph_client
*client
;
97 unsigned long mount_state
;
98 int min_caps
; /* min caps i added */
100 struct ceph_mds_client
*mdsc
;
103 mempool_t
*wb_pagevec_pool
;
104 struct workqueue_struct
*wb_wq
;
105 struct workqueue_struct
*pg_inv_wq
;
106 struct workqueue_struct
*trunc_wq
;
107 atomic_long_t writeback_count
;
109 #ifdef CONFIG_DEBUG_FS
110 struct dentry
*debugfs_dentry_lru
, *debugfs_caps
;
111 struct dentry
*debugfs_congestion_kb
;
112 struct dentry
*debugfs_bdi
;
113 struct dentry
*debugfs_mdsc
, *debugfs_mdsmap
;
114 struct dentry
*debugfs_mds_sessions
;
117 #ifdef CONFIG_CEPH_FSCACHE
118 struct fscache_cookie
*fscache
;
124 * File i/o capability. This tracks shared state with the metadata
125 * server that allows us to cache or writeback attributes or to read
126 * and write data. For any given inode, we should have one or more
127 * capabilities, one issued by each metadata server, and our
128 * cumulative access is the OR of all issued capabilities.
130 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
131 * session capability lists.
134 struct ceph_inode_info
*ci
;
135 struct rb_node ci_node
; /* per-ci cap tree */
136 struct ceph_mds_session
*session
;
137 struct list_head session_caps
; /* per-session caplist */
138 u64 cap_id
; /* unique cap id (mds provided) */
142 int issued
; /* latest, from the mds */
143 int implemented
; /* implemented superset of
144 issued (for revocation) */
147 /* caps to release */
153 u32 seq
, issue_seq
, mseq
;
154 u32 cap_gen
; /* active/stale cycle */
155 unsigned long last_used
;
156 struct list_head caps_item
;
159 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
160 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
161 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
163 struct ceph_cap_flush
{
165 int caps
; /* 0 means capsnap */
166 bool wake
; /* wake up flush waiters when finish ? */
167 struct list_head g_list
; // global
168 struct list_head i_list
; // per inode
172 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
173 * we first complete any in-process sync writes and writeback any dirty
174 * data before flushing the snapped state (tracked here) back to the MDS.
176 struct ceph_cap_snap
{
178 struct list_head ci_item
;
180 struct ceph_cap_flush cap_flush
;
184 struct ceph_snap_context
*context
;
190 struct ceph_buffer
*xattr_blob
;
194 struct timespec mtime
, atime
, ctime
;
198 int writing
; /* a sync write is still in progress */
199 int dirty_pages
; /* dirty pages awaiting writeback */
204 static inline void ceph_put_cap_snap(struct ceph_cap_snap
*capsnap
)
206 if (refcount_dec_and_test(&capsnap
->nref
)) {
207 if (capsnap
->xattr_blob
)
208 ceph_buffer_put(capsnap
->xattr_blob
);
214 * The frag tree describes how a directory is fragmented, potentially across
215 * multiple metadata servers. It is also used to indicate points where
216 * metadata authority is delegated, and whether/where metadata is replicated.
218 * A _leaf_ frag will be present in the i_fragtree IFF there is
219 * delegation info. That is, if mds >= 0 || ndist > 0.
221 #define CEPH_MAX_DIRFRAG_REP 4
223 struct ceph_inode_frag
{
228 int split_by
; /* i.e. 2^(split_by) children */
230 /* delegation and replication info */
231 int mds
; /* -1 if same authority as parent */
232 int ndist
; /* >0 if replicated */
233 int dist
[CEPH_MAX_DIRFRAG_REP
];
237 * We cache inode xattrs as an encoded blob until they are first used,
238 * at which point we parse them into an rbtree.
240 struct ceph_inode_xattr
{
249 int should_free_name
;
256 struct ceph_dentry_info
{
257 struct ceph_mds_session
*lease_session
;
258 u32 lease_gen
, lease_shared_gen
;
260 unsigned long lease_renew_after
, lease_renew_from
;
261 struct list_head lru
;
262 struct dentry
*dentry
;
267 struct ceph_inode_xattrs_info
{
269 * (still encoded) xattr blob. we avoid the overhead of parsing
270 * this until someone actually calls getxattr, etc.
272 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
273 * NULL means we don't know.
275 struct ceph_buffer
*blob
, *prealloc_blob
;
277 struct rb_root index
;
282 u64 version
, index_version
;
288 struct ceph_inode_info
{
289 struct ceph_vino i_vino
; /* ceph ino + snap */
291 spinlock_t i_ceph_lock
;
294 u64 i_inline_version
;
297 unsigned i_ceph_flags
;
298 atomic64_t i_release_count
;
299 atomic64_t i_ordered_count
;
300 atomic64_t i_complete_seq
[2];
302 struct ceph_dir_layout i_dir_layout
;
303 struct ceph_file_layout i_layout
;
307 struct timespec i_rctime
;
308 u64 i_rbytes
, i_rfiles
, i_rsubdirs
;
309 u64 i_files
, i_subdirs
;
311 struct rb_root i_fragtree
;
312 int i_fragtree_nsplits
;
313 struct mutex i_fragtree_mutex
;
315 struct ceph_inode_xattrs_info i_xattrs
;
317 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
319 struct rb_root i_caps
; /* cap list */
320 struct ceph_cap
*i_auth_cap
; /* authoritative cap, if any */
321 unsigned i_dirty_caps
, i_flushing_caps
; /* mask of dirtied fields */
322 struct list_head i_dirty_item
, i_flushing_item
;
323 /* we need to track cap writeback on a per-cap-bit basis, to allow
324 * overlapping, pipelined cap flushes to the mds. we can probably
325 * reduce the tid to 8 bits if we're concerned about inode size. */
326 struct ceph_cap_flush
*i_prealloc_cap_flush
;
327 struct list_head i_cap_flush_list
;
328 wait_queue_head_t i_cap_wq
; /* threads waiting on a capability */
329 unsigned long i_hold_caps_min
; /* jiffies */
330 unsigned long i_hold_caps_max
; /* jiffies */
331 struct list_head i_cap_delay_list
; /* for delayed cap release to mds */
332 struct ceph_cap_reservation i_cap_migration_resv
;
333 struct list_head i_cap_snaps
; /* snapped state pending flush to mds */
334 struct ceph_snap_context
*i_head_snapc
; /* set if wr_buffer_head > 0 or
335 dirty|flushing caps */
336 unsigned i_snap_caps
; /* cap bits for snapped files */
338 int i_nr_by_mode
[CEPH_FILE_MODE_BITS
]; /* open file counts */
340 struct mutex i_truncate_mutex
;
341 u32 i_truncate_seq
; /* last truncate to smaller size */
342 u64 i_truncate_size
; /* and the size we last truncated down to */
343 int i_truncate_pending
; /* still need to call vmtruncate */
345 u64 i_max_size
; /* max file size authorized by mds */
346 u64 i_reported_size
; /* (max_)size reported to or requested of mds */
347 u64 i_wanted_max_size
; /* offset we'd like to write too */
348 u64 i_requested_max_size
; /* max_size we've requested */
350 /* held references to caps */
352 int i_rd_ref
, i_rdcache_ref
, i_wr_ref
, i_wb_ref
;
353 int i_wrbuffer_ref
, i_wrbuffer_ref_head
;
354 u32 i_shared_gen
; /* increment each time we get FILE_SHARED */
355 u32 i_rdcache_gen
; /* incremented each time we get FILE_CACHE. */
356 u32 i_rdcache_revoking
; /* RDCACHE gen to async invalidate, if any */
358 struct list_head i_unsafe_dirops
; /* uncommitted mds dir ops */
359 struct list_head i_unsafe_iops
; /* uncommitted mds inode ops */
360 spinlock_t i_unsafe_lock
;
362 struct ceph_snap_realm
*i_snap_realm
; /* snap realm (if caps) */
363 int i_snap_realm_counter
; /* snap realm (if caps) */
364 struct list_head i_snap_realm_item
;
365 struct list_head i_snap_flush_item
;
367 struct work_struct i_wb_work
; /* writeback work */
368 struct work_struct i_pg_inv_work
; /* page invalidation work */
370 struct work_struct i_vmtruncate_work
;
372 #ifdef CONFIG_CEPH_FSCACHE
373 struct fscache_cookie
*fscache
;
376 struct inode vfs_inode
; /* at end */
379 static inline struct ceph_inode_info
*ceph_inode(struct inode
*inode
)
381 return container_of(inode
, struct ceph_inode_info
, vfs_inode
);
384 static inline struct ceph_fs_client
*ceph_inode_to_client(struct inode
*inode
)
386 return (struct ceph_fs_client
*)inode
->i_sb
->s_fs_info
;
389 static inline struct ceph_fs_client
*ceph_sb_to_client(struct super_block
*sb
)
391 return (struct ceph_fs_client
*)sb
->s_fs_info
;
394 static inline struct ceph_vino
ceph_vino(struct inode
*inode
)
396 return ceph_inode(inode
)->i_vino
;
400 * ino_t is <64 bits on many architectures, blech.
402 * i_ino (kernel inode) st_ino (userspace)
407 static inline u32
ceph_ino_to_ino32(__u64 vino
)
409 u32 ino
= vino
& 0xffffffff;
419 static inline ino_t
ceph_vino_to_ino(struct ceph_vino vino
)
421 #if BITS_PER_LONG == 32
422 return ceph_ino_to_ino32(vino
.ino
);
424 return (ino_t
)vino
.ino
;
429 * user-visible ino (stat, filldir)
431 #if BITS_PER_LONG == 32
432 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
437 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
439 if (ceph_test_mount_opt(ceph_sb_to_client(sb
), INO32
))
440 ino
= ceph_ino_to_ino32(ino
);
446 /* for printf-style formatting */
447 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
449 static inline u64
ceph_ino(struct inode
*inode
)
451 return ceph_inode(inode
)->i_vino
.ino
;
453 static inline u64
ceph_snap(struct inode
*inode
)
455 return ceph_inode(inode
)->i_vino
.snap
;
458 static inline int ceph_ino_compare(struct inode
*inode
, void *data
)
460 struct ceph_vino
*pvino
= (struct ceph_vino
*)data
;
461 struct ceph_inode_info
*ci
= ceph_inode(inode
);
462 return ci
->i_vino
.ino
== pvino
->ino
&&
463 ci
->i_vino
.snap
== pvino
->snap
;
466 static inline struct inode
*ceph_find_inode(struct super_block
*sb
,
467 struct ceph_vino vino
)
469 ino_t t
= ceph_vino_to_ino(vino
);
470 return ilookup5(sb
, t
, ceph_ino_compare
, &vino
);
477 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
478 #define CEPH_I_NODELAY (1 << 1) /* do not delay cap release */
479 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
480 #define CEPH_I_NOFLUSH (1 << 3) /* do not flush dirty caps */
481 #define CEPH_I_POOL_PERM (1 << 4) /* pool rd/wr bits are valid */
482 #define CEPH_I_POOL_RD (1 << 5) /* can read from pool */
483 #define CEPH_I_POOL_WR (1 << 6) /* can write to pool */
484 #define CEPH_I_SEC_INITED (1 << 7) /* security initialized */
485 #define CEPH_I_CAP_DROPPED (1 << 8) /* caps were forcibly dropped */
486 #define CEPH_I_KICK_FLUSH (1 << 9) /* kick flushing caps */
487 #define CEPH_I_FLUSH_SNAPS (1 << 10) /* need flush snapss */
488 #define CEPH_I_ERROR_WRITE (1 << 11) /* have seen write errors */
491 * We set the ERROR_WRITE bit when we start seeing write errors on an inode
492 * and then clear it when they start succeeding. Note that we do a lockless
493 * check first, and only take the lock if it looks like it needs to be changed.
494 * The write submission code just takes this as a hint, so we're not too
495 * worried if a few slip through in either direction.
497 static inline void ceph_set_error_write(struct ceph_inode_info
*ci
)
499 if (!(READ_ONCE(ci
->i_ceph_flags
) & CEPH_I_ERROR_WRITE
)) {
500 spin_lock(&ci
->i_ceph_lock
);
501 ci
->i_ceph_flags
|= CEPH_I_ERROR_WRITE
;
502 spin_unlock(&ci
->i_ceph_lock
);
506 static inline void ceph_clear_error_write(struct ceph_inode_info
*ci
)
508 if (READ_ONCE(ci
->i_ceph_flags
) & CEPH_I_ERROR_WRITE
) {
509 spin_lock(&ci
->i_ceph_lock
);
510 ci
->i_ceph_flags
&= ~CEPH_I_ERROR_WRITE
;
511 spin_unlock(&ci
->i_ceph_lock
);
515 static inline void __ceph_dir_set_complete(struct ceph_inode_info
*ci
,
516 long long release_count
,
517 long long ordered_count
)
519 smp_mb__before_atomic();
520 atomic64_set(&ci
->i_complete_seq
[0], release_count
);
521 atomic64_set(&ci
->i_complete_seq
[1], ordered_count
);
524 static inline void __ceph_dir_clear_complete(struct ceph_inode_info
*ci
)
526 atomic64_inc(&ci
->i_release_count
);
529 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info
*ci
)
531 atomic64_inc(&ci
->i_ordered_count
);
534 static inline bool __ceph_dir_is_complete(struct ceph_inode_info
*ci
)
536 return atomic64_read(&ci
->i_complete_seq
[0]) ==
537 atomic64_read(&ci
->i_release_count
);
540 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info
*ci
)
542 return atomic64_read(&ci
->i_complete_seq
[0]) ==
543 atomic64_read(&ci
->i_release_count
) &&
544 atomic64_read(&ci
->i_complete_seq
[1]) ==
545 atomic64_read(&ci
->i_ordered_count
);
548 static inline void ceph_dir_clear_complete(struct inode
*inode
)
550 __ceph_dir_clear_complete(ceph_inode(inode
));
553 static inline void ceph_dir_clear_ordered(struct inode
*inode
)
555 __ceph_dir_clear_ordered(ceph_inode(inode
));
558 static inline bool ceph_dir_is_complete_ordered(struct inode
*inode
)
560 bool ret
= __ceph_dir_is_complete_ordered(ceph_inode(inode
));
565 /* find a specific frag @f */
566 extern struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
,
570 * choose fragment for value @v. copy frag content to pfrag, if leaf
573 extern u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
574 struct ceph_inode_frag
*pfrag
,
577 static inline struct ceph_dentry_info
*ceph_dentry(struct dentry
*dentry
)
579 return (struct ceph_dentry_info
*)dentry
->d_fsdata
;
585 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info
*ci
)
587 return !RB_EMPTY_ROOT(&ci
->i_caps
);
590 extern int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
);
591 extern int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int t
);
592 extern int __ceph_caps_issued_other(struct ceph_inode_info
*ci
,
593 struct ceph_cap
*cap
);
595 static inline int ceph_caps_issued(struct ceph_inode_info
*ci
)
598 spin_lock(&ci
->i_ceph_lock
);
599 issued
= __ceph_caps_issued(ci
, NULL
);
600 spin_unlock(&ci
->i_ceph_lock
);
604 static inline int ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
,
608 spin_lock(&ci
->i_ceph_lock
);
609 r
= __ceph_caps_issued_mask(ci
, mask
, touch
);
610 spin_unlock(&ci
->i_ceph_lock
);
614 static inline int __ceph_caps_dirty(struct ceph_inode_info
*ci
)
616 return ci
->i_dirty_caps
| ci
->i_flushing_caps
;
618 extern struct ceph_cap_flush
*ceph_alloc_cap_flush(void);
619 extern void ceph_free_cap_flush(struct ceph_cap_flush
*cf
);
620 extern int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
,
621 struct ceph_cap_flush
**pcf
);
623 extern int __ceph_caps_revoking_other(struct ceph_inode_info
*ci
,
624 struct ceph_cap
*ocap
, int mask
);
625 extern int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
);
626 extern int __ceph_caps_used(struct ceph_inode_info
*ci
);
628 extern int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
);
631 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
633 static inline int __ceph_caps_wanted(struct ceph_inode_info
*ci
)
635 int w
= __ceph_caps_file_wanted(ci
) | __ceph_caps_used(ci
);
636 if (w
& CEPH_CAP_FILE_BUFFER
)
637 w
|= CEPH_CAP_FILE_EXCL
; /* we want EXCL if dirty data */
641 /* what the mds thinks we want */
642 extern int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
, bool check
);
644 extern void ceph_caps_init(struct ceph_mds_client
*mdsc
);
645 extern void ceph_caps_finalize(struct ceph_mds_client
*mdsc
);
646 extern void ceph_adjust_min_caps(struct ceph_mds_client
*mdsc
, int delta
);
647 extern void ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
648 struct ceph_cap_reservation
*ctx
, int need
);
649 extern int ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
650 struct ceph_cap_reservation
*ctx
);
651 extern void ceph_reservation_status(struct ceph_fs_client
*client
,
652 int *total
, int *avail
, int *used
,
653 int *reserved
, int *min
);
658 * we keep buffered readdir results attached to file->private_data
660 #define CEPH_F_SYNC 1
661 #define CEPH_F_ATEND 2
663 struct ceph_file_info
{
664 short fmode
; /* initialized on open */
665 short flags
; /* CEPH_F_* */
667 /* readdir: position within the dir */
669 struct ceph_mds_request
*last_readdir
;
671 /* readdir: position within a frag */
672 unsigned next_offset
; /* offset of next chunk (last_name's + 1) */
673 char *last_name
; /* last entry in previous chunk */
674 long long dir_release_count
;
675 long long dir_ordered_count
;
676 int readdir_cache_idx
;
678 /* used for -o dirstat read() on directory thing */
683 struct ceph_readdir_cache_control
{
685 struct dentry
**dentries
;
690 * A "snap realm" describes a subset of the file hierarchy sharing
691 * the same set of snapshots that apply to it. The realms themselves
692 * are organized into a hierarchy, such that children inherit (some of)
693 * the snapshots of their parents.
695 * All inodes within the realm that have capabilities are linked into a
698 struct ceph_snap_realm
{
705 u64 parent_since
; /* snapid when our current parent became so */
707 u64
*prior_parent_snaps
; /* snaps inherited from any parents we */
708 u32 num_prior_parent_snaps
; /* had prior to parent_since */
709 u64
*snaps
; /* snaps specific to this realm */
712 struct ceph_snap_realm
*parent
;
713 struct list_head children
; /* list of child realms */
714 struct list_head child_item
;
716 struct list_head empty_item
; /* if i have ref==0 */
718 struct list_head dirty_item
; /* if realm needs new context */
720 /* the current set of snaps for this realm */
721 struct ceph_snap_context
*cached_context
;
723 struct list_head inodes_with_caps
;
724 spinlock_t inodes_with_caps_lock
;
727 static inline int default_congestion_kb(void)
734 * congestion size, scale with available memory.
746 * This allows larger machines to have larger/more transfers.
747 * Limit the default to 256M
749 congestion_kb
= (16*int_sqrt(totalram_pages
)) << (PAGE_SHIFT
-10);
750 if (congestion_kb
> 256*1024)
751 congestion_kb
= 256*1024;
753 return congestion_kb
;
759 struct ceph_snap_realm
*ceph_lookup_snap_realm(struct ceph_mds_client
*mdsc
,
761 extern void ceph_get_snap_realm(struct ceph_mds_client
*mdsc
,
762 struct ceph_snap_realm
*realm
);
763 extern void ceph_put_snap_realm(struct ceph_mds_client
*mdsc
,
764 struct ceph_snap_realm
*realm
);
765 extern int ceph_update_snap_trace(struct ceph_mds_client
*m
,
766 void *p
, void *e
, bool deletion
,
767 struct ceph_snap_realm
**realm_ret
);
768 extern void ceph_handle_snap(struct ceph_mds_client
*mdsc
,
769 struct ceph_mds_session
*session
,
770 struct ceph_msg
*msg
);
771 extern void ceph_queue_cap_snap(struct ceph_inode_info
*ci
);
772 extern int __ceph_finish_cap_snap(struct ceph_inode_info
*ci
,
773 struct ceph_cap_snap
*capsnap
);
774 extern void ceph_cleanup_empty_realms(struct ceph_mds_client
*mdsc
);
777 * a cap_snap is "pending" if it is still awaiting an in-progress
778 * sync write (that may/may not still update size, mtime, etc.).
780 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info
*ci
)
782 return !list_empty(&ci
->i_cap_snaps
) &&
783 list_last_entry(&ci
->i_cap_snaps
, struct ceph_cap_snap
,
788 extern const struct inode_operations ceph_file_iops
;
790 extern struct inode
*ceph_alloc_inode(struct super_block
*sb
);
791 extern void ceph_destroy_inode(struct inode
*inode
);
792 extern int ceph_drop_inode(struct inode
*inode
);
794 extern struct inode
*ceph_get_inode(struct super_block
*sb
,
795 struct ceph_vino vino
);
796 extern struct inode
*ceph_get_snapdir(struct inode
*parent
);
797 extern int ceph_fill_file_size(struct inode
*inode
, int issued
,
798 u32 truncate_seq
, u64 truncate_size
, u64 size
);
799 extern void ceph_fill_file_time(struct inode
*inode
, int issued
,
800 u64 time_warp_seq
, struct timespec
*ctime
,
801 struct timespec
*mtime
, struct timespec
*atime
);
802 extern int ceph_fill_trace(struct super_block
*sb
,
803 struct ceph_mds_request
*req
);
804 extern int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
805 struct ceph_mds_session
*session
);
807 extern int ceph_inode_holds_cap(struct inode
*inode
, int mask
);
809 extern bool ceph_inode_set_size(struct inode
*inode
, loff_t size
);
810 extern void __ceph_do_pending_vmtruncate(struct inode
*inode
);
811 extern void ceph_queue_vmtruncate(struct inode
*inode
);
813 extern void ceph_queue_invalidate(struct inode
*inode
);
814 extern void ceph_queue_writeback(struct inode
*inode
);
816 extern int __ceph_do_getattr(struct inode
*inode
, struct page
*locked_page
,
817 int mask
, bool force
);
818 static inline int ceph_do_getattr(struct inode
*inode
, int mask
, bool force
)
820 return __ceph_do_getattr(inode
, NULL
, mask
, force
);
822 extern int ceph_permission(struct inode
*inode
, int mask
);
823 extern int __ceph_setattr(struct inode
*inode
, struct iattr
*attr
);
824 extern int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
);
825 extern int ceph_getattr(const struct path
*path
, struct kstat
*stat
,
826 u32 request_mask
, unsigned int flags
);
829 int __ceph_setxattr(struct inode
*, const char *, const void *, size_t, int);
830 ssize_t
__ceph_getxattr(struct inode
*, const char *, void *, size_t);
831 extern ssize_t
ceph_listxattr(struct dentry
*, char *, size_t);
832 extern void __ceph_build_xattrs_blob(struct ceph_inode_info
*ci
);
833 extern void __ceph_destroy_xattrs(struct ceph_inode_info
*ci
);
834 extern void __init
ceph_xattr_init(void);
835 extern void ceph_xattr_exit(void);
836 extern const struct xattr_handler
*ceph_xattr_handlers
[];
838 #ifdef CONFIG_SECURITY
839 extern bool ceph_security_xattr_deadlock(struct inode
*in
);
840 extern bool ceph_security_xattr_wanted(struct inode
*in
);
842 static inline bool ceph_security_xattr_deadlock(struct inode
*in
)
846 static inline bool ceph_security_xattr_wanted(struct inode
*in
)
853 struct ceph_acls_info
{
856 struct ceph_pagelist
*pagelist
;
859 #ifdef CONFIG_CEPH_FS_POSIX_ACL
861 struct posix_acl
*ceph_get_acl(struct inode
*, int);
862 int ceph_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
863 int ceph_pre_init_acls(struct inode
*dir
, umode_t
*mode
,
864 struct ceph_acls_info
*info
);
865 void ceph_init_inode_acls(struct inode
*inode
, struct ceph_acls_info
*info
);
866 void ceph_release_acls_info(struct ceph_acls_info
*info
);
868 static inline void ceph_forget_all_cached_acls(struct inode
*inode
)
870 forget_all_cached_acls(inode
);
875 #define ceph_get_acl NULL
876 #define ceph_set_acl NULL
878 static inline int ceph_pre_init_acls(struct inode
*dir
, umode_t
*mode
,
879 struct ceph_acls_info
*info
)
883 static inline void ceph_init_inode_acls(struct inode
*inode
,
884 struct ceph_acls_info
*info
)
887 static inline void ceph_release_acls_info(struct ceph_acls_info
*info
)
890 static inline int ceph_acl_chmod(struct dentry
*dentry
, struct inode
*inode
)
895 static inline void ceph_forget_all_cached_acls(struct inode
*inode
)
902 extern const char *ceph_cap_string(int c
);
903 extern void ceph_handle_caps(struct ceph_mds_session
*session
,
904 struct ceph_msg
*msg
);
905 extern struct ceph_cap
*ceph_get_cap(struct ceph_mds_client
*mdsc
,
906 struct ceph_cap_reservation
*ctx
);
907 extern void ceph_add_cap(struct inode
*inode
,
908 struct ceph_mds_session
*session
, u64 cap_id
,
909 int fmode
, unsigned issued
, unsigned wanted
,
910 unsigned cap
, unsigned seq
, u64 realmino
, int flags
,
911 struct ceph_cap
**new_cap
);
912 extern void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
);
913 extern void ceph_put_cap(struct ceph_mds_client
*mdsc
,
914 struct ceph_cap
*cap
);
915 extern int ceph_is_any_caps(struct inode
*inode
);
917 extern void ceph_queue_caps_release(struct inode
*inode
);
918 extern int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
919 extern int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
,
921 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
922 struct ceph_mds_session
*session
);
923 extern void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
924 struct ceph_mds_session
*session
);
925 extern struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
,
927 extern int ceph_get_cap_mds(struct inode
*inode
);
928 extern void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
);
929 extern void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
);
930 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
931 struct ceph_snap_context
*snapc
);
932 extern void ceph_flush_snaps(struct ceph_inode_info
*ci
,
933 struct ceph_mds_session
**psession
);
934 extern bool __ceph_should_report_size(struct ceph_inode_info
*ci
);
935 extern void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
936 struct ceph_mds_session
*session
);
937 extern void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
);
938 extern void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
);
940 extern int ceph_encode_inode_release(void **p
, struct inode
*inode
,
941 int mds
, int drop
, int unless
, int force
);
942 extern int ceph_encode_dentry_release(void **p
, struct dentry
*dn
,
944 int mds
, int drop
, int unless
);
946 extern int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
947 loff_t endoff
, int *got
, struct page
**pinned_page
);
948 extern int ceph_try_get_caps(struct ceph_inode_info
*ci
,
949 int need
, int want
, int *got
);
951 /* for counting open files by mode */
952 extern void __ceph_get_fmode(struct ceph_inode_info
*ci
, int mode
);
953 extern void ceph_put_fmode(struct ceph_inode_info
*ci
, int mode
);
956 extern const struct address_space_operations ceph_aops
;
957 extern int ceph_mmap(struct file
*file
, struct vm_area_struct
*vma
);
958 extern int ceph_uninline_data(struct file
*filp
, struct page
*locked_page
);
959 extern int ceph_pool_perm_check(struct ceph_inode_info
*ci
, int need
);
960 extern void ceph_pool_perm_destroy(struct ceph_mds_client
* mdsc
);
963 extern const struct file_operations ceph_file_fops
;
965 extern int ceph_renew_caps(struct inode
*inode
);
966 extern int ceph_open(struct inode
*inode
, struct file
*file
);
967 extern int ceph_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
968 struct file
*file
, unsigned flags
, umode_t mode
,
970 extern int ceph_release(struct inode
*inode
, struct file
*filp
);
971 extern void ceph_fill_inline_data(struct inode
*inode
, struct page
*locked_page
,
972 char *data
, size_t len
);
975 extern const struct file_operations ceph_dir_fops
;
976 extern const struct file_operations ceph_snapdir_fops
;
977 extern const struct inode_operations ceph_dir_iops
;
978 extern const struct inode_operations ceph_snapdir_iops
;
979 extern const struct dentry_operations ceph_dentry_ops
;
981 extern loff_t
ceph_make_fpos(unsigned high
, unsigned off
, bool hash_order
);
982 extern int ceph_handle_notrace_create(struct inode
*dir
, struct dentry
*dentry
);
983 extern int ceph_handle_snapdir(struct ceph_mds_request
*req
,
984 struct dentry
*dentry
, int err
);
985 extern struct dentry
*ceph_finish_lookup(struct ceph_mds_request
*req
,
986 struct dentry
*dentry
, int err
);
988 extern void ceph_dentry_lru_add(struct dentry
*dn
);
989 extern void ceph_dentry_lru_touch(struct dentry
*dn
);
990 extern void ceph_dentry_lru_del(struct dentry
*dn
);
991 extern void ceph_invalidate_dentry_lease(struct dentry
*dentry
);
992 extern unsigned ceph_dentry_hash(struct inode
*dir
, struct dentry
*dn
);
993 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control
*ctl
);
996 extern long ceph_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
999 extern const struct export_operations ceph_export_ops
;
1002 extern __init
void ceph_flock_init(void);
1003 extern int ceph_lock(struct file
*file
, int cmd
, struct file_lock
*fl
);
1004 extern int ceph_flock(struct file
*file
, int cmd
, struct file_lock
*fl
);
1005 extern void ceph_count_locks(struct inode
*inode
, int *p_num
, int *f_num
);
1006 extern int ceph_encode_locks_to_buffer(struct inode
*inode
,
1007 struct ceph_filelock
*flocks
,
1008 int num_fcntl_locks
,
1009 int num_flock_locks
);
1010 extern int ceph_locks_to_pagelist(struct ceph_filelock
*flocks
,
1011 struct ceph_pagelist
*pagelist
,
1012 int num_fcntl_locks
, int num_flock_locks
);
1013 extern int lock_to_ceph_filelock(struct file_lock
*fl
, struct ceph_filelock
*c
);
1016 extern int ceph_fs_debugfs_init(struct ceph_fs_client
*client
);
1017 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client
*client
);
1019 #endif /* _FS_CEPH_SUPER_H */