1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _FS_CEPH_SUPER_H
3 #define _FS_CEPH_SUPER_H
5 #include <linux/ceph/ceph_debug.h>
7 #include <asm/unaligned.h>
8 #include <linux/backing-dev.h>
9 #include <linux/completion.h>
10 #include <linux/exportfs.h>
12 #include <linux/mempool.h>
13 #include <linux/pagemap.h>
14 #include <linux/wait.h>
15 #include <linux/writeback.h>
16 #include <linux/slab.h>
17 #include <linux/posix_acl.h>
18 #include <linux/refcount.h>
20 #include <linux/ceph/libceph.h>
22 #ifdef CONFIG_CEPH_FSCACHE
23 #include <linux/fscache.h>
26 /* f_type in struct statfs */
27 #define CEPH_SUPER_MAGIC 0x00c36400
29 /* large granularity for statfs utilization stats to facilitate
30 * large volume sizes on 32-bit machines. */
31 #define CEPH_BLOCK_SHIFT 22 /* 4 MB */
32 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
34 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
35 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
36 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
37 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
38 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
39 #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
40 #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
41 #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
42 #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */
43 #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */
45 #define CEPH_MOUNT_OPT_DEFAULT \
46 (CEPH_MOUNT_OPT_DCACHE | \
47 CEPH_MOUNT_OPT_NOCOPYFROM)
49 #define ceph_set_mount_opt(fsc, opt) \
50 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
51 #define ceph_test_mount_opt(fsc, opt) \
52 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
54 /* max size of osd read request, limited by libceph */
55 #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
56 /* osd has a configurable limitaion of max write size.
57 * CEPH_MSG_MAX_DATA_LEN should be small enough. */
58 #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
59 #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */
60 #define CEPH_MAX_READDIR_DEFAULT 1024
61 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
62 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
65 * Delay telling the MDS we no longer want caps, in case we reopen
66 * the file. Delay a minimum amount of time, even if we send a cap
67 * message for some other reason. Otherwise, take the oppotunity to
68 * update the mds to avoid sending another message later.
70 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
71 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
73 struct ceph_mount_options
{
77 int wsize
; /* max write size */
78 int rsize
; /* max read size */
79 int rasize
; /* max readahead */
80 int congestion_kb
; /* max writeback in flight */
81 int caps_wanted_delay_min
, caps_wanted_delay_max
;
83 int max_readdir
; /* max readdir result (entires) */
84 int max_readdir_bytes
; /* max readdir result (bytes) */
87 * everything above this point can be memcmp'd; everything below
88 * is handled in compare_mount_options()
91 char *snapdir_name
; /* default ".snap" */
92 char *mds_namespace
; /* default NULL */
93 char *server_path
; /* default "/" */
94 char *fscache_uniq
; /* default NULL */
97 struct ceph_fs_client
{
98 struct super_block
*sb
;
100 struct ceph_mount_options
*mount_options
;
101 struct ceph_client
*client
;
103 unsigned long mount_state
;
104 loff_t max_file_size
;
106 struct ceph_mds_client
*mdsc
;
109 mempool_t
*wb_pagevec_pool
;
110 atomic_long_t writeback_count
;
112 struct workqueue_struct
*wb_wq
;
113 struct workqueue_struct
*pg_inv_wq
;
114 struct workqueue_struct
*trunc_wq
;
115 struct workqueue_struct
*cap_wq
;
117 #ifdef CONFIG_DEBUG_FS
118 struct dentry
*debugfs_dentry_lru
, *debugfs_caps
;
119 struct dentry
*debugfs_congestion_kb
;
120 struct dentry
*debugfs_bdi
;
121 struct dentry
*debugfs_mdsc
, *debugfs_mdsmap
;
122 struct dentry
*debugfs_mds_sessions
;
125 #ifdef CONFIG_CEPH_FSCACHE
126 struct fscache_cookie
*fscache
;
132 * File i/o capability. This tracks shared state with the metadata
133 * server that allows us to cache or writeback attributes or to read
134 * and write data. For any given inode, we should have one or more
135 * capabilities, one issued by each metadata server, and our
136 * cumulative access is the OR of all issued capabilities.
138 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
139 * session capability lists.
142 struct ceph_inode_info
*ci
;
143 struct rb_node ci_node
; /* per-ci cap tree */
144 struct ceph_mds_session
*session
;
145 struct list_head session_caps
; /* per-session caplist */
146 u64 cap_id
; /* unique cap id (mds provided) */
150 int issued
; /* latest, from the mds */
151 int implemented
; /* implemented superset of
152 issued (for revocation) */
155 /* caps to release */
161 u32 seq
, issue_seq
, mseq
;
162 u32 cap_gen
; /* active/stale cycle */
163 unsigned long last_used
;
164 struct list_head caps_item
;
167 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
168 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
169 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
171 struct ceph_cap_flush
{
173 int caps
; /* 0 means capsnap */
174 bool wake
; /* wake up flush waiters when finish ? */
175 struct list_head g_list
; // global
176 struct list_head i_list
; // per inode
180 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
181 * we first complete any in-process sync writes and writeback any dirty
182 * data before flushing the snapped state (tracked here) back to the MDS.
184 struct ceph_cap_snap
{
186 struct list_head ci_item
;
188 struct ceph_cap_flush cap_flush
;
192 struct ceph_snap_context
*context
;
198 struct ceph_buffer
*xattr_blob
;
202 struct timespec64 mtime
, atime
, ctime
;
206 int writing
; /* a sync write is still in progress */
207 int dirty_pages
; /* dirty pages awaiting writeback */
212 static inline void ceph_put_cap_snap(struct ceph_cap_snap
*capsnap
)
214 if (refcount_dec_and_test(&capsnap
->nref
)) {
215 if (capsnap
->xattr_blob
)
216 ceph_buffer_put(capsnap
->xattr_blob
);
222 * The frag tree describes how a directory is fragmented, potentially across
223 * multiple metadata servers. It is also used to indicate points where
224 * metadata authority is delegated, and whether/where metadata is replicated.
226 * A _leaf_ frag will be present in the i_fragtree IFF there is
227 * delegation info. That is, if mds >= 0 || ndist > 0.
229 #define CEPH_MAX_DIRFRAG_REP 4
231 struct ceph_inode_frag
{
236 int split_by
; /* i.e. 2^(split_by) children */
238 /* delegation and replication info */
239 int mds
; /* -1 if same authority as parent */
240 int ndist
; /* >0 if replicated */
241 int dist
[CEPH_MAX_DIRFRAG_REP
];
245 * We cache inode xattrs as an encoded blob until they are first used,
246 * at which point we parse them into an rbtree.
248 struct ceph_inode_xattr
{
257 int should_free_name
;
264 struct ceph_dentry_info
{
265 struct dentry
*dentry
;
266 struct ceph_mds_session
*lease_session
;
267 struct list_head lease_list
;
269 int lease_shared_gen
;
272 unsigned long lease_renew_after
, lease_renew_from
;
277 #define CEPH_DENTRY_REFERENCED 1
278 #define CEPH_DENTRY_LEASE_LIST 2
279 #define CEPH_DENTRY_SHRINK_LIST 4
281 struct ceph_inode_xattrs_info
{
283 * (still encoded) xattr blob. we avoid the overhead of parsing
284 * this until someone actually calls getxattr, etc.
286 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
287 * NULL means we don't know.
289 struct ceph_buffer
*blob
, *prealloc_blob
;
291 struct rb_root index
;
296 u64 version
, index_version
;
302 struct ceph_inode_info
{
303 struct ceph_vino i_vino
; /* ceph ino + snap */
305 spinlock_t i_ceph_lock
;
308 u64 i_inline_version
;
311 unsigned i_ceph_flags
;
312 atomic64_t i_release_count
;
313 atomic64_t i_ordered_count
;
314 atomic64_t i_complete_seq
[2];
316 struct ceph_dir_layout i_dir_layout
;
317 struct ceph_file_layout i_layout
;
321 struct timespec64 i_rctime
;
322 u64 i_rbytes
, i_rfiles
, i_rsubdirs
;
323 u64 i_files
, i_subdirs
;
326 u64 i_max_bytes
, i_max_files
;
330 struct rb_root i_fragtree
;
331 int i_fragtree_nsplits
;
332 struct mutex i_fragtree_mutex
;
334 struct ceph_inode_xattrs_info i_xattrs
;
336 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
338 struct rb_root i_caps
; /* cap list */
339 struct ceph_cap
*i_auth_cap
; /* authoritative cap, if any */
340 unsigned i_dirty_caps
, i_flushing_caps
; /* mask of dirtied fields */
341 struct list_head i_dirty_item
, i_flushing_item
;
342 /* we need to track cap writeback on a per-cap-bit basis, to allow
343 * overlapping, pipelined cap flushes to the mds. we can probably
344 * reduce the tid to 8 bits if we're concerned about inode size. */
345 struct ceph_cap_flush
*i_prealloc_cap_flush
;
346 struct list_head i_cap_flush_list
;
347 wait_queue_head_t i_cap_wq
; /* threads waiting on a capability */
348 unsigned long i_hold_caps_min
; /* jiffies */
349 unsigned long i_hold_caps_max
; /* jiffies */
350 struct list_head i_cap_delay_list
; /* for delayed cap release to mds */
351 struct ceph_cap_reservation i_cap_migration_resv
;
352 struct list_head i_cap_snaps
; /* snapped state pending flush to mds */
353 struct ceph_snap_context
*i_head_snapc
; /* set if wr_buffer_head > 0 or
354 dirty|flushing caps */
355 unsigned i_snap_caps
; /* cap bits for snapped files */
357 int i_nr_by_mode
[CEPH_FILE_MODE_BITS
]; /* open file counts */
359 struct mutex i_truncate_mutex
;
360 u32 i_truncate_seq
; /* last truncate to smaller size */
361 u64 i_truncate_size
; /* and the size we last truncated down to */
362 int i_truncate_pending
; /* still need to call vmtruncate */
364 u64 i_max_size
; /* max file size authorized by mds */
365 u64 i_reported_size
; /* (max_)size reported to or requested of mds */
366 u64 i_wanted_max_size
; /* offset we'd like to write too */
367 u64 i_requested_max_size
; /* max_size we've requested */
369 /* held references to caps */
371 int i_rd_ref
, i_rdcache_ref
, i_wr_ref
, i_wb_ref
;
372 int i_wrbuffer_ref
, i_wrbuffer_ref_head
;
373 atomic_t i_filelock_ref
;
374 atomic_t i_shared_gen
; /* increment each time we get FILE_SHARED */
375 u32 i_rdcache_gen
; /* incremented each time we get FILE_CACHE. */
376 u32 i_rdcache_revoking
; /* RDCACHE gen to async invalidate, if any */
378 struct list_head i_unsafe_dirops
; /* uncommitted mds dir ops */
379 struct list_head i_unsafe_iops
; /* uncommitted mds inode ops */
380 spinlock_t i_unsafe_lock
;
383 struct ceph_snap_realm
*i_snap_realm
; /* snap realm (if caps) */
384 struct ceph_snapid_map
*i_snapid_map
; /* snapid -> dev_t */
386 int i_snap_realm_counter
; /* snap realm (if caps) */
387 struct list_head i_snap_realm_item
;
388 struct list_head i_snap_flush_item
;
390 struct work_struct i_wb_work
; /* writeback work */
391 struct work_struct i_pg_inv_work
; /* page invalidation work */
393 struct work_struct i_vmtruncate_work
;
395 #ifdef CONFIG_CEPH_FSCACHE
396 struct fscache_cookie
*fscache
;
399 struct inode vfs_inode
; /* at end */
402 static inline struct ceph_inode_info
*ceph_inode(struct inode
*inode
)
404 return container_of(inode
, struct ceph_inode_info
, vfs_inode
);
407 static inline struct ceph_fs_client
*ceph_inode_to_client(struct inode
*inode
)
409 return (struct ceph_fs_client
*)inode
->i_sb
->s_fs_info
;
412 static inline struct ceph_fs_client
*ceph_sb_to_client(struct super_block
*sb
)
414 return (struct ceph_fs_client
*)sb
->s_fs_info
;
417 static inline struct ceph_vino
ceph_vino(struct inode
*inode
)
419 return ceph_inode(inode
)->i_vino
;
423 * ino_t is <64 bits on many architectures, blech.
425 * i_ino (kernel inode) st_ino (userspace)
430 static inline u32
ceph_ino_to_ino32(__u64 vino
)
432 u32 ino
= vino
& 0xffffffff;
442 static inline ino_t
ceph_vino_to_ino(struct ceph_vino vino
)
444 #if BITS_PER_LONG == 32
445 return ceph_ino_to_ino32(vino
.ino
);
447 return (ino_t
)vino
.ino
;
452 * user-visible ino (stat, filldir)
454 #if BITS_PER_LONG == 32
455 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
460 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
462 if (ceph_test_mount_opt(ceph_sb_to_client(sb
), INO32
))
463 ino
= ceph_ino_to_ino32(ino
);
469 /* for printf-style formatting */
470 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
472 static inline u64
ceph_ino(struct inode
*inode
)
474 return ceph_inode(inode
)->i_vino
.ino
;
476 static inline u64
ceph_snap(struct inode
*inode
)
478 return ceph_inode(inode
)->i_vino
.snap
;
481 static inline int ceph_ino_compare(struct inode
*inode
, void *data
)
483 struct ceph_vino
*pvino
= (struct ceph_vino
*)data
;
484 struct ceph_inode_info
*ci
= ceph_inode(inode
);
485 return ci
->i_vino
.ino
== pvino
->ino
&&
486 ci
->i_vino
.snap
== pvino
->snap
;
489 static inline struct inode
*ceph_find_inode(struct super_block
*sb
,
490 struct ceph_vino vino
)
492 ino_t t
= ceph_vino_to_ino(vino
);
493 return ilookup5(sb
, t
, ceph_ino_compare
, &vino
);
500 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
501 #define CEPH_I_NODELAY (1 << 1) /* do not delay cap release */
502 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
503 #define CEPH_I_NOFLUSH (1 << 3) /* do not flush dirty caps */
504 #define CEPH_I_POOL_PERM (1 << 4) /* pool rd/wr bits are valid */
505 #define CEPH_I_POOL_RD (1 << 5) /* can read from pool */
506 #define CEPH_I_POOL_WR (1 << 6) /* can write to pool */
507 #define CEPH_I_SEC_INITED (1 << 7) /* security initialized */
508 #define CEPH_I_CAP_DROPPED (1 << 8) /* caps were forcibly dropped */
509 #define CEPH_I_KICK_FLUSH (1 << 9) /* kick flushing caps */
510 #define CEPH_I_FLUSH_SNAPS (1 << 10) /* need flush snapss */
511 #define CEPH_I_ERROR_WRITE (1 << 11) /* have seen write errors */
512 #define CEPH_I_ERROR_FILELOCK (1 << 12) /* have seen file lock errors */
516 * We set the ERROR_WRITE bit when we start seeing write errors on an inode
517 * and then clear it when they start succeeding. Note that we do a lockless
518 * check first, and only take the lock if it looks like it needs to be changed.
519 * The write submission code just takes this as a hint, so we're not too
520 * worried if a few slip through in either direction.
522 static inline void ceph_set_error_write(struct ceph_inode_info
*ci
)
524 if (!(READ_ONCE(ci
->i_ceph_flags
) & CEPH_I_ERROR_WRITE
)) {
525 spin_lock(&ci
->i_ceph_lock
);
526 ci
->i_ceph_flags
|= CEPH_I_ERROR_WRITE
;
527 spin_unlock(&ci
->i_ceph_lock
);
531 static inline void ceph_clear_error_write(struct ceph_inode_info
*ci
)
533 if (READ_ONCE(ci
->i_ceph_flags
) & CEPH_I_ERROR_WRITE
) {
534 spin_lock(&ci
->i_ceph_lock
);
535 ci
->i_ceph_flags
&= ~CEPH_I_ERROR_WRITE
;
536 spin_unlock(&ci
->i_ceph_lock
);
540 static inline void __ceph_dir_set_complete(struct ceph_inode_info
*ci
,
541 long long release_count
,
542 long long ordered_count
)
544 smp_mb__before_atomic();
545 atomic64_set(&ci
->i_complete_seq
[0], release_count
);
546 atomic64_set(&ci
->i_complete_seq
[1], ordered_count
);
549 static inline void __ceph_dir_clear_complete(struct ceph_inode_info
*ci
)
551 atomic64_inc(&ci
->i_release_count
);
554 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info
*ci
)
556 atomic64_inc(&ci
->i_ordered_count
);
559 static inline bool __ceph_dir_is_complete(struct ceph_inode_info
*ci
)
561 return atomic64_read(&ci
->i_complete_seq
[0]) ==
562 atomic64_read(&ci
->i_release_count
);
565 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info
*ci
)
567 return atomic64_read(&ci
->i_complete_seq
[0]) ==
568 atomic64_read(&ci
->i_release_count
) &&
569 atomic64_read(&ci
->i_complete_seq
[1]) ==
570 atomic64_read(&ci
->i_ordered_count
);
573 static inline void ceph_dir_clear_complete(struct inode
*inode
)
575 __ceph_dir_clear_complete(ceph_inode(inode
));
578 static inline void ceph_dir_clear_ordered(struct inode
*inode
)
580 __ceph_dir_clear_ordered(ceph_inode(inode
));
583 static inline bool ceph_dir_is_complete_ordered(struct inode
*inode
)
585 bool ret
= __ceph_dir_is_complete_ordered(ceph_inode(inode
));
590 /* find a specific frag @f */
591 extern struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
,
595 * choose fragment for value @v. copy frag content to pfrag, if leaf
598 extern u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
599 struct ceph_inode_frag
*pfrag
,
602 static inline struct ceph_dentry_info
*ceph_dentry(const struct dentry
*dentry
)
604 return (struct ceph_dentry_info
*)dentry
->d_fsdata
;
610 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info
*ci
)
612 return !RB_EMPTY_ROOT(&ci
->i_caps
);
615 extern int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
);
616 extern int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int t
);
617 extern int __ceph_caps_issued_other(struct ceph_inode_info
*ci
,
618 struct ceph_cap
*cap
);
620 static inline int ceph_caps_issued(struct ceph_inode_info
*ci
)
623 spin_lock(&ci
->i_ceph_lock
);
624 issued
= __ceph_caps_issued(ci
, NULL
);
625 spin_unlock(&ci
->i_ceph_lock
);
629 static inline int ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
,
633 spin_lock(&ci
->i_ceph_lock
);
634 r
= __ceph_caps_issued_mask(ci
, mask
, touch
);
635 spin_unlock(&ci
->i_ceph_lock
);
639 static inline int __ceph_caps_dirty(struct ceph_inode_info
*ci
)
641 return ci
->i_dirty_caps
| ci
->i_flushing_caps
;
643 extern struct ceph_cap_flush
*ceph_alloc_cap_flush(void);
644 extern void ceph_free_cap_flush(struct ceph_cap_flush
*cf
);
645 extern int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
,
646 struct ceph_cap_flush
**pcf
);
648 extern int __ceph_caps_revoking_other(struct ceph_inode_info
*ci
,
649 struct ceph_cap
*ocap
, int mask
);
650 extern int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
);
651 extern int __ceph_caps_used(struct ceph_inode_info
*ci
);
653 extern int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
);
656 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
658 static inline int __ceph_caps_wanted(struct ceph_inode_info
*ci
)
660 int w
= __ceph_caps_file_wanted(ci
) | __ceph_caps_used(ci
);
661 if (w
& CEPH_CAP_FILE_BUFFER
)
662 w
|= CEPH_CAP_FILE_EXCL
; /* we want EXCL if dirty data */
666 /* what the mds thinks we want */
667 extern int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
, bool check
);
669 extern void ceph_caps_init(struct ceph_mds_client
*mdsc
);
670 extern void ceph_caps_finalize(struct ceph_mds_client
*mdsc
);
671 extern void ceph_adjust_caps_max_min(struct ceph_mds_client
*mdsc
,
672 struct ceph_mount_options
*fsopt
);
673 extern int ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
674 struct ceph_cap_reservation
*ctx
, int need
);
675 extern void ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
676 struct ceph_cap_reservation
*ctx
);
677 extern void ceph_reservation_status(struct ceph_fs_client
*client
,
678 int *total
, int *avail
, int *used
,
679 int *reserved
, int *min
);
684 * we keep buffered readdir results attached to file->private_data
686 #define CEPH_F_SYNC 1
687 #define CEPH_F_ATEND 2
689 struct ceph_file_info
{
690 short fmode
; /* initialized on open */
691 short flags
; /* CEPH_F_* */
693 spinlock_t rw_contexts_lock
;
694 struct list_head rw_contexts
;
697 struct ceph_dir_file_info
{
698 struct ceph_file_info file_info
;
700 /* readdir: position within the dir */
702 struct ceph_mds_request
*last_readdir
;
704 /* readdir: position within a frag */
705 unsigned next_offset
; /* offset of next chunk (last_name's + 1) */
706 char *last_name
; /* last entry in previous chunk */
707 long long dir_release_count
;
708 long long dir_ordered_count
;
709 int readdir_cache_idx
;
711 /* used for -o dirstat read() on directory thing */
716 struct ceph_rw_context
{
717 struct list_head list
;
718 struct task_struct
*thread
;
722 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
723 struct ceph_rw_context _name = { \
728 static inline void ceph_add_rw_context(struct ceph_file_info
*cf
,
729 struct ceph_rw_context
*ctx
)
731 spin_lock(&cf
->rw_contexts_lock
);
732 list_add(&ctx
->list
, &cf
->rw_contexts
);
733 spin_unlock(&cf
->rw_contexts_lock
);
736 static inline void ceph_del_rw_context(struct ceph_file_info
*cf
,
737 struct ceph_rw_context
*ctx
)
739 spin_lock(&cf
->rw_contexts_lock
);
740 list_del(&ctx
->list
);
741 spin_unlock(&cf
->rw_contexts_lock
);
744 static inline struct ceph_rw_context
*
745 ceph_find_rw_context(struct ceph_file_info
*cf
)
747 struct ceph_rw_context
*ctx
, *found
= NULL
;
748 spin_lock(&cf
->rw_contexts_lock
);
749 list_for_each_entry(ctx
, &cf
->rw_contexts
, list
) {
750 if (ctx
->thread
== current
) {
755 spin_unlock(&cf
->rw_contexts_lock
);
759 struct ceph_readdir_cache_control
{
761 struct dentry
**dentries
;
766 * A "snap realm" describes a subset of the file hierarchy sharing
767 * the same set of snapshots that apply to it. The realms themselves
768 * are organized into a hierarchy, such that children inherit (some of)
769 * the snapshots of their parents.
771 * All inodes within the realm that have capabilities are linked into a
774 struct ceph_snap_realm
{
782 u64 parent_since
; /* snapid when our current parent became so */
784 u64
*prior_parent_snaps
; /* snaps inherited from any parents we */
785 u32 num_prior_parent_snaps
; /* had prior to parent_since */
786 u64
*snaps
; /* snaps specific to this realm */
789 struct ceph_snap_realm
*parent
;
790 struct list_head children
; /* list of child realms */
791 struct list_head child_item
;
793 struct list_head empty_item
; /* if i have ref==0 */
795 struct list_head dirty_item
; /* if realm needs new context */
797 /* the current set of snaps for this realm */
798 struct ceph_snap_context
*cached_context
;
800 struct list_head inodes_with_caps
;
801 spinlock_t inodes_with_caps_lock
;
804 static inline int default_congestion_kb(void)
811 * congestion size, scale with available memory.
823 * This allows larger machines to have larger/more transfers.
824 * Limit the default to 256M
826 congestion_kb
= (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT
-10);
827 if (congestion_kb
> 256*1024)
828 congestion_kb
= 256*1024;
830 return congestion_kb
;
836 struct ceph_snap_realm
*ceph_lookup_snap_realm(struct ceph_mds_client
*mdsc
,
838 extern void ceph_get_snap_realm(struct ceph_mds_client
*mdsc
,
839 struct ceph_snap_realm
*realm
);
840 extern void ceph_put_snap_realm(struct ceph_mds_client
*mdsc
,
841 struct ceph_snap_realm
*realm
);
842 extern int ceph_update_snap_trace(struct ceph_mds_client
*m
,
843 void *p
, void *e
, bool deletion
,
844 struct ceph_snap_realm
**realm_ret
);
845 extern void ceph_handle_snap(struct ceph_mds_client
*mdsc
,
846 struct ceph_mds_session
*session
,
847 struct ceph_msg
*msg
);
848 extern void ceph_queue_cap_snap(struct ceph_inode_info
*ci
);
849 extern int __ceph_finish_cap_snap(struct ceph_inode_info
*ci
,
850 struct ceph_cap_snap
*capsnap
);
851 extern void ceph_cleanup_empty_realms(struct ceph_mds_client
*mdsc
);
853 extern struct ceph_snapid_map
*ceph_get_snapid_map(struct ceph_mds_client
*mdsc
,
855 extern void ceph_put_snapid_map(struct ceph_mds_client
* mdsc
,
856 struct ceph_snapid_map
*sm
);
857 extern void ceph_trim_snapid_map(struct ceph_mds_client
*mdsc
);
858 extern void ceph_cleanup_snapid_map(struct ceph_mds_client
*mdsc
);
862 * a cap_snap is "pending" if it is still awaiting an in-progress
863 * sync write (that may/may not still update size, mtime, etc.).
865 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info
*ci
)
867 return !list_empty(&ci
->i_cap_snaps
) &&
868 list_last_entry(&ci
->i_cap_snaps
, struct ceph_cap_snap
,
873 extern const struct inode_operations ceph_file_iops
;
875 extern struct inode
*ceph_alloc_inode(struct super_block
*sb
);
876 extern void ceph_destroy_inode(struct inode
*inode
);
877 extern int ceph_drop_inode(struct inode
*inode
);
879 extern struct inode
*ceph_get_inode(struct super_block
*sb
,
880 struct ceph_vino vino
);
881 extern struct inode
*ceph_get_snapdir(struct inode
*parent
);
882 extern int ceph_fill_file_size(struct inode
*inode
, int issued
,
883 u32 truncate_seq
, u64 truncate_size
, u64 size
);
884 extern void ceph_fill_file_time(struct inode
*inode
, int issued
,
885 u64 time_warp_seq
, struct timespec64
*ctime
,
886 struct timespec64
*mtime
,
887 struct timespec64
*atime
);
888 extern int ceph_fill_trace(struct super_block
*sb
,
889 struct ceph_mds_request
*req
);
890 extern int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
891 struct ceph_mds_session
*session
);
893 extern int ceph_inode_holds_cap(struct inode
*inode
, int mask
);
895 extern bool ceph_inode_set_size(struct inode
*inode
, loff_t size
);
896 extern void __ceph_do_pending_vmtruncate(struct inode
*inode
);
897 extern void ceph_queue_vmtruncate(struct inode
*inode
);
899 extern void ceph_queue_invalidate(struct inode
*inode
);
900 extern void ceph_queue_writeback(struct inode
*inode
);
902 extern int __ceph_do_getattr(struct inode
*inode
, struct page
*locked_page
,
903 int mask
, bool force
);
904 static inline int ceph_do_getattr(struct inode
*inode
, int mask
, bool force
)
906 return __ceph_do_getattr(inode
, NULL
, mask
, force
);
908 extern int ceph_permission(struct inode
*inode
, int mask
);
909 extern int __ceph_setattr(struct inode
*inode
, struct iattr
*attr
);
910 extern int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
);
911 extern int ceph_getattr(const struct path
*path
, struct kstat
*stat
,
912 u32 request_mask
, unsigned int flags
);
915 int __ceph_setxattr(struct inode
*, const char *, const void *, size_t, int);
916 ssize_t
__ceph_getxattr(struct inode
*, const char *, void *, size_t);
917 extern ssize_t
ceph_listxattr(struct dentry
*, char *, size_t);
918 extern void __ceph_build_xattrs_blob(struct ceph_inode_info
*ci
);
919 extern void __ceph_destroy_xattrs(struct ceph_inode_info
*ci
);
920 extern void __init
ceph_xattr_init(void);
921 extern void ceph_xattr_exit(void);
922 extern const struct xattr_handler
*ceph_xattr_handlers
[];
924 #ifdef CONFIG_SECURITY
925 extern bool ceph_security_xattr_deadlock(struct inode
*in
);
926 extern bool ceph_security_xattr_wanted(struct inode
*in
);
928 static inline bool ceph_security_xattr_deadlock(struct inode
*in
)
932 static inline bool ceph_security_xattr_wanted(struct inode
*in
)
939 struct ceph_acls_info
{
942 struct ceph_pagelist
*pagelist
;
945 #ifdef CONFIG_CEPH_FS_POSIX_ACL
947 struct posix_acl
*ceph_get_acl(struct inode
*, int);
948 int ceph_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
949 int ceph_pre_init_acls(struct inode
*dir
, umode_t
*mode
,
950 struct ceph_acls_info
*info
);
951 void ceph_init_inode_acls(struct inode
*inode
, struct ceph_acls_info
*info
);
952 void ceph_release_acls_info(struct ceph_acls_info
*info
);
954 static inline void ceph_forget_all_cached_acls(struct inode
*inode
)
956 forget_all_cached_acls(inode
);
961 #define ceph_get_acl NULL
962 #define ceph_set_acl NULL
964 static inline int ceph_pre_init_acls(struct inode
*dir
, umode_t
*mode
,
965 struct ceph_acls_info
*info
)
969 static inline void ceph_init_inode_acls(struct inode
*inode
,
970 struct ceph_acls_info
*info
)
973 static inline void ceph_release_acls_info(struct ceph_acls_info
*info
)
976 static inline int ceph_acl_chmod(struct dentry
*dentry
, struct inode
*inode
)
981 static inline void ceph_forget_all_cached_acls(struct inode
*inode
)
988 extern const char *ceph_cap_string(int c
);
989 extern void ceph_handle_caps(struct ceph_mds_session
*session
,
990 struct ceph_msg
*msg
);
991 extern struct ceph_cap
*ceph_get_cap(struct ceph_mds_client
*mdsc
,
992 struct ceph_cap_reservation
*ctx
);
993 extern void ceph_add_cap(struct inode
*inode
,
994 struct ceph_mds_session
*session
, u64 cap_id
,
995 int fmode
, unsigned issued
, unsigned wanted
,
996 unsigned cap
, unsigned seq
, u64 realmino
, int flags
,
997 struct ceph_cap
**new_cap
);
998 extern void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
);
999 extern void __ceph_remove_caps(struct inode
* inode
);
1000 extern void ceph_put_cap(struct ceph_mds_client
*mdsc
,
1001 struct ceph_cap
*cap
);
1002 extern int ceph_is_any_caps(struct inode
*inode
);
1004 extern int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
1005 extern int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
,
1007 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
1008 struct ceph_mds_session
*session
);
1009 extern void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
1010 struct ceph_mds_session
*session
);
1011 extern struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
,
1013 extern int ceph_get_cap_mds(struct inode
*inode
);
1014 extern void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
);
1015 extern void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
);
1016 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
1017 struct ceph_snap_context
*snapc
);
1018 extern void ceph_flush_snaps(struct ceph_inode_info
*ci
,
1019 struct ceph_mds_session
**psession
);
1020 extern bool __ceph_should_report_size(struct ceph_inode_info
*ci
);
1021 extern void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1022 struct ceph_mds_session
*session
);
1023 extern void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
);
1024 extern void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
);
1025 extern int ceph_drop_caps_for_unlink(struct inode
*inode
);
1026 extern int ceph_encode_inode_release(void **p
, struct inode
*inode
,
1027 int mds
, int drop
, int unless
, int force
);
1028 extern int ceph_encode_dentry_release(void **p
, struct dentry
*dn
,
1030 int mds
, int drop
, int unless
);
1032 extern int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
1033 loff_t endoff
, int *got
, struct page
**pinned_page
);
1034 extern int ceph_try_get_caps(struct ceph_inode_info
*ci
,
1035 int need
, int want
, bool nonblock
, int *got
);
1037 /* for counting open files by mode */
1038 extern void __ceph_get_fmode(struct ceph_inode_info
*ci
, int mode
);
1039 extern void ceph_put_fmode(struct ceph_inode_info
*ci
, int mode
);
1042 extern const struct address_space_operations ceph_aops
;
1043 extern int ceph_mmap(struct file
*file
, struct vm_area_struct
*vma
);
1044 extern int ceph_uninline_data(struct file
*filp
, struct page
*locked_page
);
1045 extern int ceph_pool_perm_check(struct ceph_inode_info
*ci
, int need
);
1046 extern void ceph_pool_perm_destroy(struct ceph_mds_client
* mdsc
);
1049 extern const struct file_operations ceph_file_fops
;
1051 extern int ceph_renew_caps(struct inode
*inode
);
1052 extern int ceph_open(struct inode
*inode
, struct file
*file
);
1053 extern int ceph_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
1054 struct file
*file
, unsigned flags
, umode_t mode
);
1055 extern int ceph_release(struct inode
*inode
, struct file
*filp
);
1056 extern void ceph_fill_inline_data(struct inode
*inode
, struct page
*locked_page
,
1057 char *data
, size_t len
);
1060 extern const struct file_operations ceph_dir_fops
;
1061 extern const struct file_operations ceph_snapdir_fops
;
1062 extern const struct inode_operations ceph_dir_iops
;
1063 extern const struct inode_operations ceph_snapdir_iops
;
1064 extern const struct dentry_operations ceph_dentry_ops
;
1066 extern loff_t
ceph_make_fpos(unsigned high
, unsigned off
, bool hash_order
);
1067 extern int ceph_handle_notrace_create(struct inode
*dir
, struct dentry
*dentry
);
1068 extern int ceph_handle_snapdir(struct ceph_mds_request
*req
,
1069 struct dentry
*dentry
, int err
);
1070 extern struct dentry
*ceph_finish_lookup(struct ceph_mds_request
*req
,
1071 struct dentry
*dentry
, int err
);
1073 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info
*di
);
1074 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info
*di
);
1075 extern void ceph_invalidate_dentry_lease(struct dentry
*dentry
);
1076 extern int ceph_trim_dentries(struct ceph_mds_client
*mdsc
);
1077 extern unsigned ceph_dentry_hash(struct inode
*dir
, struct dentry
*dn
);
1078 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control
*ctl
);
1081 extern long ceph_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1084 extern const struct export_operations ceph_export_ops
;
1085 struct inode
*ceph_lookup_inode(struct super_block
*sb
, u64 ino
);
1088 extern __init
void ceph_flock_init(void);
1089 extern int ceph_lock(struct file
*file
, int cmd
, struct file_lock
*fl
);
1090 extern int ceph_flock(struct file
*file
, int cmd
, struct file_lock
*fl
);
1091 extern void ceph_count_locks(struct inode
*inode
, int *p_num
, int *f_num
);
1092 extern int ceph_encode_locks_to_buffer(struct inode
*inode
,
1093 struct ceph_filelock
*flocks
,
1094 int num_fcntl_locks
,
1095 int num_flock_locks
);
1096 extern int ceph_locks_to_pagelist(struct ceph_filelock
*flocks
,
1097 struct ceph_pagelist
*pagelist
,
1098 int num_fcntl_locks
, int num_flock_locks
);
1101 extern int ceph_fs_debugfs_init(struct ceph_fs_client
*client
);
1102 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client
*client
);
1105 static inline bool __ceph_has_any_quota(struct ceph_inode_info
*ci
)
1107 return ci
->i_max_files
|| ci
->i_max_bytes
;
1110 extern void ceph_adjust_quota_realms_count(struct inode
*inode
, bool inc
);
1112 static inline void __ceph_update_quota(struct ceph_inode_info
*ci
,
1113 u64 max_bytes
, u64 max_files
)
1115 bool had_quota
, has_quota
;
1116 had_quota
= __ceph_has_any_quota(ci
);
1117 ci
->i_max_bytes
= max_bytes
;
1118 ci
->i_max_files
= max_files
;
1119 has_quota
= __ceph_has_any_quota(ci
);
1121 if (had_quota
!= has_quota
)
1122 ceph_adjust_quota_realms_count(&ci
->vfs_inode
, has_quota
);
1125 extern void ceph_handle_quota(struct ceph_mds_client
*mdsc
,
1126 struct ceph_mds_session
*session
,
1127 struct ceph_msg
*msg
);
1128 extern bool ceph_quota_is_max_files_exceeded(struct inode
*inode
);
1129 extern bool ceph_quota_is_same_realm(struct inode
*old
, struct inode
*new);
1130 extern bool ceph_quota_is_max_bytes_exceeded(struct inode
*inode
,
1132 extern bool ceph_quota_is_max_bytes_approaching(struct inode
*inode
,
1134 extern bool ceph_quota_update_statfs(struct ceph_fs_client
*fsc
,
1135 struct kstatfs
*buf
);
1136 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client
*mdsc
);
1138 #endif /* _FS_CEPH_SUPER_H */