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
;
82 int max_readdir
; /* max readdir result (entires) */
83 int max_readdir_bytes
; /* max readdir result (bytes) */
86 * everything above this point can be memcmp'd; everything below
87 * is handled in compare_mount_options()
90 char *snapdir_name
; /* default ".snap" */
91 char *mds_namespace
; /* default NULL */
92 char *server_path
; /* default "/" */
93 char *fscache_uniq
; /* default NULL */
96 struct ceph_fs_client
{
97 struct super_block
*sb
;
99 struct ceph_mount_options
*mount_options
;
100 struct ceph_client
*client
;
102 unsigned long mount_state
;
103 int min_caps
; /* min caps i added */
104 loff_t max_file_size
;
106 struct ceph_mds_client
*mdsc
;
109 mempool_t
*wb_pagevec_pool
;
110 struct workqueue_struct
*wb_wq
;
111 struct workqueue_struct
*pg_inv_wq
;
112 struct workqueue_struct
*trunc_wq
;
113 atomic_long_t writeback_count
;
115 #ifdef CONFIG_DEBUG_FS
116 struct dentry
*debugfs_dentry_lru
, *debugfs_caps
;
117 struct dentry
*debugfs_congestion_kb
;
118 struct dentry
*debugfs_bdi
;
119 struct dentry
*debugfs_mdsc
, *debugfs_mdsmap
;
120 struct dentry
*debugfs_mds_sessions
;
123 #ifdef CONFIG_CEPH_FSCACHE
124 struct fscache_cookie
*fscache
;
130 * File i/o capability. This tracks shared state with the metadata
131 * server that allows us to cache or writeback attributes or to read
132 * and write data. For any given inode, we should have one or more
133 * capabilities, one issued by each metadata server, and our
134 * cumulative access is the OR of all issued capabilities.
136 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
137 * session capability lists.
140 struct ceph_inode_info
*ci
;
141 struct rb_node ci_node
; /* per-ci cap tree */
142 struct ceph_mds_session
*session
;
143 struct list_head session_caps
; /* per-session caplist */
144 u64 cap_id
; /* unique cap id (mds provided) */
148 int issued
; /* latest, from the mds */
149 int implemented
; /* implemented superset of
150 issued (for revocation) */
153 /* caps to release */
159 u32 seq
, issue_seq
, mseq
;
160 u32 cap_gen
; /* active/stale cycle */
161 unsigned long last_used
;
162 struct list_head caps_item
;
165 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
166 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
167 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
169 struct ceph_cap_flush
{
171 int caps
; /* 0 means capsnap */
172 bool wake
; /* wake up flush waiters when finish ? */
173 struct list_head g_list
; // global
174 struct list_head i_list
; // per inode
178 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
179 * we first complete any in-process sync writes and writeback any dirty
180 * data before flushing the snapped state (tracked here) back to the MDS.
182 struct ceph_cap_snap
{
184 struct list_head ci_item
;
186 struct ceph_cap_flush cap_flush
;
190 struct ceph_snap_context
*context
;
196 struct ceph_buffer
*xattr_blob
;
200 struct timespec64 mtime
, atime
, ctime
;
204 int writing
; /* a sync write is still in progress */
205 int dirty_pages
; /* dirty pages awaiting writeback */
210 static inline void ceph_put_cap_snap(struct ceph_cap_snap
*capsnap
)
212 if (refcount_dec_and_test(&capsnap
->nref
)) {
213 if (capsnap
->xattr_blob
)
214 ceph_buffer_put(capsnap
->xattr_blob
);
220 * The frag tree describes how a directory is fragmented, potentially across
221 * multiple metadata servers. It is also used to indicate points where
222 * metadata authority is delegated, and whether/where metadata is replicated.
224 * A _leaf_ frag will be present in the i_fragtree IFF there is
225 * delegation info. That is, if mds >= 0 || ndist > 0.
227 #define CEPH_MAX_DIRFRAG_REP 4
229 struct ceph_inode_frag
{
234 int split_by
; /* i.e. 2^(split_by) children */
236 /* delegation and replication info */
237 int mds
; /* -1 if same authority as parent */
238 int ndist
; /* >0 if replicated */
239 int dist
[CEPH_MAX_DIRFRAG_REP
];
243 * We cache inode xattrs as an encoded blob until they are first used,
244 * at which point we parse them into an rbtree.
246 struct ceph_inode_xattr
{
255 int should_free_name
;
262 struct ceph_dentry_info
{
263 struct ceph_mds_session
*lease_session
;
264 int lease_shared_gen
;
267 unsigned long lease_renew_after
, lease_renew_from
;
268 struct list_head lru
;
269 struct dentry
*dentry
;
274 struct ceph_inode_xattrs_info
{
276 * (still encoded) xattr blob. we avoid the overhead of parsing
277 * this until someone actually calls getxattr, etc.
279 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
280 * NULL means we don't know.
282 struct ceph_buffer
*blob
, *prealloc_blob
;
284 struct rb_root index
;
289 u64 version
, index_version
;
295 struct ceph_inode_info
{
296 struct ceph_vino i_vino
; /* ceph ino + snap */
298 spinlock_t i_ceph_lock
;
301 u64 i_inline_version
;
304 unsigned i_ceph_flags
;
305 atomic64_t i_release_count
;
306 atomic64_t i_ordered_count
;
307 atomic64_t i_complete_seq
[2];
309 struct ceph_dir_layout i_dir_layout
;
310 struct ceph_file_layout i_layout
;
314 struct timespec64 i_rctime
;
315 u64 i_rbytes
, i_rfiles
, i_rsubdirs
;
316 u64 i_files
, i_subdirs
;
319 u64 i_max_bytes
, i_max_files
;
321 struct rb_root i_fragtree
;
322 int i_fragtree_nsplits
;
323 struct mutex i_fragtree_mutex
;
325 struct ceph_inode_xattrs_info i_xattrs
;
327 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
329 struct rb_root i_caps
; /* cap list */
330 struct ceph_cap
*i_auth_cap
; /* authoritative cap, if any */
331 unsigned i_dirty_caps
, i_flushing_caps
; /* mask of dirtied fields */
332 struct list_head i_dirty_item
, i_flushing_item
;
333 /* we need to track cap writeback on a per-cap-bit basis, to allow
334 * overlapping, pipelined cap flushes to the mds. we can probably
335 * reduce the tid to 8 bits if we're concerned about inode size. */
336 struct ceph_cap_flush
*i_prealloc_cap_flush
;
337 struct list_head i_cap_flush_list
;
338 wait_queue_head_t i_cap_wq
; /* threads waiting on a capability */
339 unsigned long i_hold_caps_min
; /* jiffies */
340 unsigned long i_hold_caps_max
; /* jiffies */
341 struct list_head i_cap_delay_list
; /* for delayed cap release to mds */
342 struct ceph_cap_reservation i_cap_migration_resv
;
343 struct list_head i_cap_snaps
; /* snapped state pending flush to mds */
344 struct ceph_snap_context
*i_head_snapc
; /* set if wr_buffer_head > 0 or
345 dirty|flushing caps */
346 unsigned i_snap_caps
; /* cap bits for snapped files */
348 int i_nr_by_mode
[CEPH_FILE_MODE_BITS
]; /* open file counts */
350 struct mutex i_truncate_mutex
;
351 u32 i_truncate_seq
; /* last truncate to smaller size */
352 u64 i_truncate_size
; /* and the size we last truncated down to */
353 int i_truncate_pending
; /* still need to call vmtruncate */
355 u64 i_max_size
; /* max file size authorized by mds */
356 u64 i_reported_size
; /* (max_)size reported to or requested of mds */
357 u64 i_wanted_max_size
; /* offset we'd like to write too */
358 u64 i_requested_max_size
; /* max_size we've requested */
360 /* held references to caps */
362 int i_rd_ref
, i_rdcache_ref
, i_wr_ref
, i_wb_ref
;
363 int i_wrbuffer_ref
, i_wrbuffer_ref_head
;
364 atomic_t i_filelock_ref
;
365 atomic_t i_shared_gen
; /* increment each time we get FILE_SHARED */
366 u32 i_rdcache_gen
; /* incremented each time we get FILE_CACHE. */
367 u32 i_rdcache_revoking
; /* RDCACHE gen to async invalidate, if any */
369 struct list_head i_unsafe_dirops
; /* uncommitted mds dir ops */
370 struct list_head i_unsafe_iops
; /* uncommitted mds inode ops */
371 spinlock_t i_unsafe_lock
;
373 struct ceph_snap_realm
*i_snap_realm
; /* snap realm (if caps) */
374 int i_snap_realm_counter
; /* snap realm (if caps) */
375 struct list_head i_snap_realm_item
;
376 struct list_head i_snap_flush_item
;
378 struct work_struct i_wb_work
; /* writeback work */
379 struct work_struct i_pg_inv_work
; /* page invalidation work */
381 struct work_struct i_vmtruncate_work
;
383 #ifdef CONFIG_CEPH_FSCACHE
384 struct fscache_cookie
*fscache
;
387 struct inode vfs_inode
; /* at end */
390 static inline struct ceph_inode_info
*ceph_inode(struct inode
*inode
)
392 return container_of(inode
, struct ceph_inode_info
, vfs_inode
);
395 static inline struct ceph_fs_client
*ceph_inode_to_client(struct inode
*inode
)
397 return (struct ceph_fs_client
*)inode
->i_sb
->s_fs_info
;
400 static inline struct ceph_fs_client
*ceph_sb_to_client(struct super_block
*sb
)
402 return (struct ceph_fs_client
*)sb
->s_fs_info
;
405 static inline struct ceph_vino
ceph_vino(struct inode
*inode
)
407 return ceph_inode(inode
)->i_vino
;
411 * ino_t is <64 bits on many architectures, blech.
413 * i_ino (kernel inode) st_ino (userspace)
418 static inline u32
ceph_ino_to_ino32(__u64 vino
)
420 u32 ino
= vino
& 0xffffffff;
430 static inline ino_t
ceph_vino_to_ino(struct ceph_vino vino
)
432 #if BITS_PER_LONG == 32
433 return ceph_ino_to_ino32(vino
.ino
);
435 return (ino_t
)vino
.ino
;
440 * user-visible ino (stat, filldir)
442 #if BITS_PER_LONG == 32
443 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
448 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
450 if (ceph_test_mount_opt(ceph_sb_to_client(sb
), INO32
))
451 ino
= ceph_ino_to_ino32(ino
);
457 /* for printf-style formatting */
458 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
460 static inline u64
ceph_ino(struct inode
*inode
)
462 return ceph_inode(inode
)->i_vino
.ino
;
464 static inline u64
ceph_snap(struct inode
*inode
)
466 return ceph_inode(inode
)->i_vino
.snap
;
469 static inline int ceph_ino_compare(struct inode
*inode
, void *data
)
471 struct ceph_vino
*pvino
= (struct ceph_vino
*)data
;
472 struct ceph_inode_info
*ci
= ceph_inode(inode
);
473 return ci
->i_vino
.ino
== pvino
->ino
&&
474 ci
->i_vino
.snap
== pvino
->snap
;
477 static inline struct inode
*ceph_find_inode(struct super_block
*sb
,
478 struct ceph_vino vino
)
480 ino_t t
= ceph_vino_to_ino(vino
);
481 return ilookup5(sb
, t
, ceph_ino_compare
, &vino
);
488 #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
489 #define CEPH_I_NODELAY (1 << 1) /* do not delay cap release */
490 #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
491 #define CEPH_I_NOFLUSH (1 << 3) /* do not flush dirty caps */
492 #define CEPH_I_POOL_PERM (1 << 4) /* pool rd/wr bits are valid */
493 #define CEPH_I_POOL_RD (1 << 5) /* can read from pool */
494 #define CEPH_I_POOL_WR (1 << 6) /* can write to pool */
495 #define CEPH_I_SEC_INITED (1 << 7) /* security initialized */
496 #define CEPH_I_CAP_DROPPED (1 << 8) /* caps were forcibly dropped */
497 #define CEPH_I_KICK_FLUSH (1 << 9) /* kick flushing caps */
498 #define CEPH_I_FLUSH_SNAPS (1 << 10) /* need flush snapss */
499 #define CEPH_I_ERROR_WRITE (1 << 11) /* have seen write errors */
500 #define CEPH_I_ERROR_FILELOCK (1 << 12) /* have seen file lock errors */
504 * We set the ERROR_WRITE bit when we start seeing write errors on an inode
505 * and then clear it when they start succeeding. Note that we do a lockless
506 * check first, and only take the lock if it looks like it needs to be changed.
507 * The write submission code just takes this as a hint, so we're not too
508 * worried if a few slip through in either direction.
510 static inline void ceph_set_error_write(struct ceph_inode_info
*ci
)
512 if (!(READ_ONCE(ci
->i_ceph_flags
) & CEPH_I_ERROR_WRITE
)) {
513 spin_lock(&ci
->i_ceph_lock
);
514 ci
->i_ceph_flags
|= CEPH_I_ERROR_WRITE
;
515 spin_unlock(&ci
->i_ceph_lock
);
519 static inline void ceph_clear_error_write(struct ceph_inode_info
*ci
)
521 if (READ_ONCE(ci
->i_ceph_flags
) & CEPH_I_ERROR_WRITE
) {
522 spin_lock(&ci
->i_ceph_lock
);
523 ci
->i_ceph_flags
&= ~CEPH_I_ERROR_WRITE
;
524 spin_unlock(&ci
->i_ceph_lock
);
528 static inline void __ceph_dir_set_complete(struct ceph_inode_info
*ci
,
529 long long release_count
,
530 long long ordered_count
)
532 smp_mb__before_atomic();
533 atomic64_set(&ci
->i_complete_seq
[0], release_count
);
534 atomic64_set(&ci
->i_complete_seq
[1], ordered_count
);
537 static inline void __ceph_dir_clear_complete(struct ceph_inode_info
*ci
)
539 atomic64_inc(&ci
->i_release_count
);
542 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info
*ci
)
544 atomic64_inc(&ci
->i_ordered_count
);
547 static inline bool __ceph_dir_is_complete(struct ceph_inode_info
*ci
)
549 return atomic64_read(&ci
->i_complete_seq
[0]) ==
550 atomic64_read(&ci
->i_release_count
);
553 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info
*ci
)
555 return atomic64_read(&ci
->i_complete_seq
[0]) ==
556 atomic64_read(&ci
->i_release_count
) &&
557 atomic64_read(&ci
->i_complete_seq
[1]) ==
558 atomic64_read(&ci
->i_ordered_count
);
561 static inline void ceph_dir_clear_complete(struct inode
*inode
)
563 __ceph_dir_clear_complete(ceph_inode(inode
));
566 static inline void ceph_dir_clear_ordered(struct inode
*inode
)
568 __ceph_dir_clear_ordered(ceph_inode(inode
));
571 static inline bool ceph_dir_is_complete_ordered(struct inode
*inode
)
573 bool ret
= __ceph_dir_is_complete_ordered(ceph_inode(inode
));
578 /* find a specific frag @f */
579 extern struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
,
583 * choose fragment for value @v. copy frag content to pfrag, if leaf
586 extern u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
587 struct ceph_inode_frag
*pfrag
,
590 static inline struct ceph_dentry_info
*ceph_dentry(struct dentry
*dentry
)
592 return (struct ceph_dentry_info
*)dentry
->d_fsdata
;
598 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info
*ci
)
600 return !RB_EMPTY_ROOT(&ci
->i_caps
);
603 extern int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
);
604 extern int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int t
);
605 extern int __ceph_caps_issued_other(struct ceph_inode_info
*ci
,
606 struct ceph_cap
*cap
);
608 static inline int ceph_caps_issued(struct ceph_inode_info
*ci
)
611 spin_lock(&ci
->i_ceph_lock
);
612 issued
= __ceph_caps_issued(ci
, NULL
);
613 spin_unlock(&ci
->i_ceph_lock
);
617 static inline int ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
,
621 spin_lock(&ci
->i_ceph_lock
);
622 r
= __ceph_caps_issued_mask(ci
, mask
, touch
);
623 spin_unlock(&ci
->i_ceph_lock
);
627 static inline int __ceph_caps_dirty(struct ceph_inode_info
*ci
)
629 return ci
->i_dirty_caps
| ci
->i_flushing_caps
;
631 extern struct ceph_cap_flush
*ceph_alloc_cap_flush(void);
632 extern void ceph_free_cap_flush(struct ceph_cap_flush
*cf
);
633 extern int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
,
634 struct ceph_cap_flush
**pcf
);
636 extern int __ceph_caps_revoking_other(struct ceph_inode_info
*ci
,
637 struct ceph_cap
*ocap
, int mask
);
638 extern int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
);
639 extern int __ceph_caps_used(struct ceph_inode_info
*ci
);
641 extern int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
);
644 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
646 static inline int __ceph_caps_wanted(struct ceph_inode_info
*ci
)
648 int w
= __ceph_caps_file_wanted(ci
) | __ceph_caps_used(ci
);
649 if (w
& CEPH_CAP_FILE_BUFFER
)
650 w
|= CEPH_CAP_FILE_EXCL
; /* we want EXCL if dirty data */
654 /* what the mds thinks we want */
655 extern int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
, bool check
);
657 extern void ceph_caps_init(struct ceph_mds_client
*mdsc
);
658 extern void ceph_caps_finalize(struct ceph_mds_client
*mdsc
);
659 extern void ceph_adjust_min_caps(struct ceph_mds_client
*mdsc
, int delta
);
660 extern int ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
661 struct ceph_cap_reservation
*ctx
, int need
);
662 extern void ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
663 struct ceph_cap_reservation
*ctx
);
664 extern void ceph_reservation_status(struct ceph_fs_client
*client
,
665 int *total
, int *avail
, int *used
,
666 int *reserved
, int *min
);
671 * we keep buffered readdir results attached to file->private_data
673 #define CEPH_F_SYNC 1
674 #define CEPH_F_ATEND 2
676 struct ceph_file_info
{
677 short fmode
; /* initialized on open */
678 short flags
; /* CEPH_F_* */
680 spinlock_t rw_contexts_lock
;
681 struct list_head rw_contexts
;
684 struct ceph_dir_file_info
{
685 struct ceph_file_info file_info
;
687 /* readdir: position within the dir */
689 struct ceph_mds_request
*last_readdir
;
691 /* readdir: position within a frag */
692 unsigned next_offset
; /* offset of next chunk (last_name's + 1) */
693 char *last_name
; /* last entry in previous chunk */
694 long long dir_release_count
;
695 long long dir_ordered_count
;
696 int readdir_cache_idx
;
698 /* used for -o dirstat read() on directory thing */
703 struct ceph_rw_context
{
704 struct list_head list
;
705 struct task_struct
*thread
;
709 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
710 struct ceph_rw_context _name = { \
715 static inline void ceph_add_rw_context(struct ceph_file_info
*cf
,
716 struct ceph_rw_context
*ctx
)
718 spin_lock(&cf
->rw_contexts_lock
);
719 list_add(&ctx
->list
, &cf
->rw_contexts
);
720 spin_unlock(&cf
->rw_contexts_lock
);
723 static inline void ceph_del_rw_context(struct ceph_file_info
*cf
,
724 struct ceph_rw_context
*ctx
)
726 spin_lock(&cf
->rw_contexts_lock
);
727 list_del(&ctx
->list
);
728 spin_unlock(&cf
->rw_contexts_lock
);
731 static inline struct ceph_rw_context
*
732 ceph_find_rw_context(struct ceph_file_info
*cf
)
734 struct ceph_rw_context
*ctx
, *found
= NULL
;
735 spin_lock(&cf
->rw_contexts_lock
);
736 list_for_each_entry(ctx
, &cf
->rw_contexts
, list
) {
737 if (ctx
->thread
== current
) {
742 spin_unlock(&cf
->rw_contexts_lock
);
746 struct ceph_readdir_cache_control
{
748 struct dentry
**dentries
;
753 * A "snap realm" describes a subset of the file hierarchy sharing
754 * the same set of snapshots that apply to it. The realms themselves
755 * are organized into a hierarchy, such that children inherit (some of)
756 * the snapshots of their parents.
758 * All inodes within the realm that have capabilities are linked into a
761 struct ceph_snap_realm
{
769 u64 parent_since
; /* snapid when our current parent became so */
771 u64
*prior_parent_snaps
; /* snaps inherited from any parents we */
772 u32 num_prior_parent_snaps
; /* had prior to parent_since */
773 u64
*snaps
; /* snaps specific to this realm */
776 struct ceph_snap_realm
*parent
;
777 struct list_head children
; /* list of child realms */
778 struct list_head child_item
;
780 struct list_head empty_item
; /* if i have ref==0 */
782 struct list_head dirty_item
; /* if realm needs new context */
784 /* the current set of snaps for this realm */
785 struct ceph_snap_context
*cached_context
;
787 struct list_head inodes_with_caps
;
788 spinlock_t inodes_with_caps_lock
;
791 static inline int default_congestion_kb(void)
798 * congestion size, scale with available memory.
810 * This allows larger machines to have larger/more transfers.
811 * Limit the default to 256M
813 congestion_kb
= (16*int_sqrt(totalram_pages
)) << (PAGE_SHIFT
-10);
814 if (congestion_kb
> 256*1024)
815 congestion_kb
= 256*1024;
817 return congestion_kb
;
823 struct ceph_snap_realm
*ceph_lookup_snap_realm(struct ceph_mds_client
*mdsc
,
825 extern void ceph_get_snap_realm(struct ceph_mds_client
*mdsc
,
826 struct ceph_snap_realm
*realm
);
827 extern void ceph_put_snap_realm(struct ceph_mds_client
*mdsc
,
828 struct ceph_snap_realm
*realm
);
829 extern int ceph_update_snap_trace(struct ceph_mds_client
*m
,
830 void *p
, void *e
, bool deletion
,
831 struct ceph_snap_realm
**realm_ret
);
832 extern void ceph_handle_snap(struct ceph_mds_client
*mdsc
,
833 struct ceph_mds_session
*session
,
834 struct ceph_msg
*msg
);
835 extern void ceph_queue_cap_snap(struct ceph_inode_info
*ci
);
836 extern int __ceph_finish_cap_snap(struct ceph_inode_info
*ci
,
837 struct ceph_cap_snap
*capsnap
);
838 extern void ceph_cleanup_empty_realms(struct ceph_mds_client
*mdsc
);
841 * a cap_snap is "pending" if it is still awaiting an in-progress
842 * sync write (that may/may not still update size, mtime, etc.).
844 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info
*ci
)
846 return !list_empty(&ci
->i_cap_snaps
) &&
847 list_last_entry(&ci
->i_cap_snaps
, struct ceph_cap_snap
,
852 extern const struct inode_operations ceph_file_iops
;
854 extern struct inode
*ceph_alloc_inode(struct super_block
*sb
);
855 extern void ceph_destroy_inode(struct inode
*inode
);
856 extern int ceph_drop_inode(struct inode
*inode
);
858 extern struct inode
*ceph_get_inode(struct super_block
*sb
,
859 struct ceph_vino vino
);
860 extern struct inode
*ceph_get_snapdir(struct inode
*parent
);
861 extern int ceph_fill_file_size(struct inode
*inode
, int issued
,
862 u32 truncate_seq
, u64 truncate_size
, u64 size
);
863 extern void ceph_fill_file_time(struct inode
*inode
, int issued
,
864 u64 time_warp_seq
, struct timespec64
*ctime
,
865 struct timespec64
*mtime
,
866 struct timespec64
*atime
);
867 extern int ceph_fill_trace(struct super_block
*sb
,
868 struct ceph_mds_request
*req
);
869 extern int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
870 struct ceph_mds_session
*session
);
872 extern int ceph_inode_holds_cap(struct inode
*inode
, int mask
);
874 extern bool ceph_inode_set_size(struct inode
*inode
, loff_t size
);
875 extern void __ceph_do_pending_vmtruncate(struct inode
*inode
);
876 extern void ceph_queue_vmtruncate(struct inode
*inode
);
878 extern void ceph_queue_invalidate(struct inode
*inode
);
879 extern void ceph_queue_writeback(struct inode
*inode
);
881 extern int __ceph_do_getattr(struct inode
*inode
, struct page
*locked_page
,
882 int mask
, bool force
);
883 static inline int ceph_do_getattr(struct inode
*inode
, int mask
, bool force
)
885 return __ceph_do_getattr(inode
, NULL
, mask
, force
);
887 extern int ceph_permission(struct inode
*inode
, int mask
);
888 extern int __ceph_setattr(struct inode
*inode
, struct iattr
*attr
);
889 extern int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
);
890 extern int ceph_getattr(const struct path
*path
, struct kstat
*stat
,
891 u32 request_mask
, unsigned int flags
);
894 int __ceph_setxattr(struct inode
*, const char *, const void *, size_t, int);
895 ssize_t
__ceph_getxattr(struct inode
*, const char *, void *, size_t);
896 extern ssize_t
ceph_listxattr(struct dentry
*, char *, size_t);
897 extern void __ceph_build_xattrs_blob(struct ceph_inode_info
*ci
);
898 extern void __ceph_destroy_xattrs(struct ceph_inode_info
*ci
);
899 extern void __init
ceph_xattr_init(void);
900 extern void ceph_xattr_exit(void);
901 extern const struct xattr_handler
*ceph_xattr_handlers
[];
903 #ifdef CONFIG_SECURITY
904 extern bool ceph_security_xattr_deadlock(struct inode
*in
);
905 extern bool ceph_security_xattr_wanted(struct inode
*in
);
907 static inline bool ceph_security_xattr_deadlock(struct inode
*in
)
911 static inline bool ceph_security_xattr_wanted(struct inode
*in
)
918 struct ceph_acls_info
{
921 struct ceph_pagelist
*pagelist
;
924 #ifdef CONFIG_CEPH_FS_POSIX_ACL
926 struct posix_acl
*ceph_get_acl(struct inode
*, int);
927 int ceph_set_acl(struct inode
*inode
, struct posix_acl
*acl
, int type
);
928 int ceph_pre_init_acls(struct inode
*dir
, umode_t
*mode
,
929 struct ceph_acls_info
*info
);
930 void ceph_init_inode_acls(struct inode
*inode
, struct ceph_acls_info
*info
);
931 void ceph_release_acls_info(struct ceph_acls_info
*info
);
933 static inline void ceph_forget_all_cached_acls(struct inode
*inode
)
935 forget_all_cached_acls(inode
);
940 #define ceph_get_acl NULL
941 #define ceph_set_acl NULL
943 static inline int ceph_pre_init_acls(struct inode
*dir
, umode_t
*mode
,
944 struct ceph_acls_info
*info
)
948 static inline void ceph_init_inode_acls(struct inode
*inode
,
949 struct ceph_acls_info
*info
)
952 static inline void ceph_release_acls_info(struct ceph_acls_info
*info
)
955 static inline int ceph_acl_chmod(struct dentry
*dentry
, struct inode
*inode
)
960 static inline void ceph_forget_all_cached_acls(struct inode
*inode
)
967 extern const char *ceph_cap_string(int c
);
968 extern void ceph_handle_caps(struct ceph_mds_session
*session
,
969 struct ceph_msg
*msg
);
970 extern struct ceph_cap
*ceph_get_cap(struct ceph_mds_client
*mdsc
,
971 struct ceph_cap_reservation
*ctx
);
972 extern void ceph_add_cap(struct inode
*inode
,
973 struct ceph_mds_session
*session
, u64 cap_id
,
974 int fmode
, unsigned issued
, unsigned wanted
,
975 unsigned cap
, unsigned seq
, u64 realmino
, int flags
,
976 struct ceph_cap
**new_cap
);
977 extern void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
);
978 extern void ceph_put_cap(struct ceph_mds_client
*mdsc
,
979 struct ceph_cap
*cap
);
980 extern int ceph_is_any_caps(struct inode
*inode
);
982 extern void ceph_queue_caps_release(struct inode
*inode
);
983 extern int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
984 extern int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
,
986 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
987 struct ceph_mds_session
*session
);
988 extern void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
989 struct ceph_mds_session
*session
);
990 extern struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
,
992 extern int ceph_get_cap_mds(struct inode
*inode
);
993 extern void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
);
994 extern void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
);
995 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
996 struct ceph_snap_context
*snapc
);
997 extern void ceph_flush_snaps(struct ceph_inode_info
*ci
,
998 struct ceph_mds_session
**psession
);
999 extern bool __ceph_should_report_size(struct ceph_inode_info
*ci
);
1000 extern void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1001 struct ceph_mds_session
*session
);
1002 extern void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
);
1003 extern void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
);
1004 extern int ceph_drop_caps_for_unlink(struct inode
*inode
);
1005 extern int ceph_encode_inode_release(void **p
, struct inode
*inode
,
1006 int mds
, int drop
, int unless
, int force
);
1007 extern int ceph_encode_dentry_release(void **p
, struct dentry
*dn
,
1009 int mds
, int drop
, int unless
);
1011 extern int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
1012 loff_t endoff
, int *got
, struct page
**pinned_page
);
1013 extern int ceph_try_get_caps(struct ceph_inode_info
*ci
,
1014 int need
, int want
, bool nonblock
, int *got
);
1016 /* for counting open files by mode */
1017 extern void __ceph_get_fmode(struct ceph_inode_info
*ci
, int mode
);
1018 extern void ceph_put_fmode(struct ceph_inode_info
*ci
, int mode
);
1021 extern const struct address_space_operations ceph_aops
;
1022 extern int ceph_mmap(struct file
*file
, struct vm_area_struct
*vma
);
1023 extern int ceph_uninline_data(struct file
*filp
, struct page
*locked_page
);
1024 extern int ceph_pool_perm_check(struct ceph_inode_info
*ci
, int need
);
1025 extern void ceph_pool_perm_destroy(struct ceph_mds_client
* mdsc
);
1028 extern const struct file_operations ceph_file_fops
;
1030 extern int ceph_renew_caps(struct inode
*inode
);
1031 extern int ceph_open(struct inode
*inode
, struct file
*file
);
1032 extern int ceph_atomic_open(struct inode
*dir
, struct dentry
*dentry
,
1033 struct file
*file
, unsigned flags
, umode_t mode
);
1034 extern int ceph_release(struct inode
*inode
, struct file
*filp
);
1035 extern void ceph_fill_inline_data(struct inode
*inode
, struct page
*locked_page
,
1036 char *data
, size_t len
);
1039 extern const struct file_operations ceph_dir_fops
;
1040 extern const struct file_operations ceph_snapdir_fops
;
1041 extern const struct inode_operations ceph_dir_iops
;
1042 extern const struct inode_operations ceph_snapdir_iops
;
1043 extern const struct dentry_operations ceph_dentry_ops
;
1045 extern loff_t
ceph_make_fpos(unsigned high
, unsigned off
, bool hash_order
);
1046 extern int ceph_handle_notrace_create(struct inode
*dir
, struct dentry
*dentry
);
1047 extern int ceph_handle_snapdir(struct ceph_mds_request
*req
,
1048 struct dentry
*dentry
, int err
);
1049 extern struct dentry
*ceph_finish_lookup(struct ceph_mds_request
*req
,
1050 struct dentry
*dentry
, int err
);
1052 extern void ceph_dentry_lru_add(struct dentry
*dn
);
1053 extern void ceph_dentry_lru_touch(struct dentry
*dn
);
1054 extern void ceph_dentry_lru_del(struct dentry
*dn
);
1055 extern void ceph_invalidate_dentry_lease(struct dentry
*dentry
);
1056 extern unsigned ceph_dentry_hash(struct inode
*dir
, struct dentry
*dn
);
1057 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control
*ctl
);
1060 extern long ceph_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1063 extern const struct export_operations ceph_export_ops
;
1066 extern __init
void ceph_flock_init(void);
1067 extern int ceph_lock(struct file
*file
, int cmd
, struct file_lock
*fl
);
1068 extern int ceph_flock(struct file
*file
, int cmd
, struct file_lock
*fl
);
1069 extern void ceph_count_locks(struct inode
*inode
, int *p_num
, int *f_num
);
1070 extern int ceph_encode_locks_to_buffer(struct inode
*inode
,
1071 struct ceph_filelock
*flocks
,
1072 int num_fcntl_locks
,
1073 int num_flock_locks
);
1074 extern int ceph_locks_to_pagelist(struct ceph_filelock
*flocks
,
1075 struct ceph_pagelist
*pagelist
,
1076 int num_fcntl_locks
, int num_flock_locks
);
1079 extern int ceph_fs_debugfs_init(struct ceph_fs_client
*client
);
1080 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client
*client
);
1083 static inline bool __ceph_has_any_quota(struct ceph_inode_info
*ci
)
1085 return ci
->i_max_files
|| ci
->i_max_bytes
;
1088 extern void ceph_adjust_quota_realms_count(struct inode
*inode
, bool inc
);
1090 static inline void __ceph_update_quota(struct ceph_inode_info
*ci
,
1091 u64 max_bytes
, u64 max_files
)
1093 bool had_quota
, has_quota
;
1094 had_quota
= __ceph_has_any_quota(ci
);
1095 ci
->i_max_bytes
= max_bytes
;
1096 ci
->i_max_files
= max_files
;
1097 has_quota
= __ceph_has_any_quota(ci
);
1099 if (had_quota
!= has_quota
)
1100 ceph_adjust_quota_realms_count(&ci
->vfs_inode
, has_quota
);
1103 extern void ceph_handle_quota(struct ceph_mds_client
*mdsc
,
1104 struct ceph_mds_session
*session
,
1105 struct ceph_msg
*msg
);
1106 extern bool ceph_quota_is_max_files_exceeded(struct inode
*inode
);
1107 extern bool ceph_quota_is_same_realm(struct inode
*old
, struct inode
*new);
1108 extern bool ceph_quota_is_max_bytes_exceeded(struct inode
*inode
,
1110 extern bool ceph_quota_is_max_bytes_approaching(struct inode
*inode
,
1112 extern bool ceph_quota_update_statfs(struct ceph_fs_client
*fsc
,
1113 struct kstatfs
*buf
);
1115 #endif /* _FS_CEPH_SUPER_H */