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>
17 #include <linux/ceph/libceph.h>
19 /* f_type in struct statfs */
20 #define CEPH_SUPER_MAGIC 0x00c36400
22 /* large granularity for statfs utilization stats to facilitate
23 * large volume sizes on 32-bit machines. */
24 #define CEPH_BLOCK_SHIFT 20 /* 1 MB */
25 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
27 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
28 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
29 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
31 #define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES)
33 #define ceph_set_mount_opt(fsc, opt) \
34 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
35 #define ceph_test_mount_opt(fsc, opt) \
36 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
38 #define CEPH_MAX_READDIR_DEFAULT 1024
39 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
40 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
42 struct ceph_mount_options {
47 int rsize; /* max readahead */
48 int congestion_kb; /* max writeback in flight */
49 int caps_wanted_delay_min, caps_wanted_delay_max;
50 int cap_release_safety;
51 int max_readdir; /* max readdir result (entires) */
52 int max_readdir_bytes; /* max readdir result (bytes) */
55 * everything above this point can be memcmp'd; everything below
56 * is handled in compare_mount_options()
59 char *snapdir_name; /* default ".snap" */
62 struct ceph_fs_client {
63 struct super_block *sb;
65 struct ceph_mount_options *mount_options;
66 struct ceph_client *client;
68 unsigned long mount_state;
69 int min_caps; /* min caps i added */
71 struct ceph_mds_client *mdsc;
74 mempool_t *wb_pagevec_pool;
75 struct workqueue_struct *wb_wq;
76 struct workqueue_struct *pg_inv_wq;
77 struct workqueue_struct *trunc_wq;
78 atomic_long_t writeback_count;
80 struct backing_dev_info backing_dev_info;
82 #ifdef CONFIG_DEBUG_FS
83 struct dentry *debugfs_dentry_lru, *debugfs_caps;
84 struct dentry *debugfs_congestion_kb;
85 struct dentry *debugfs_bdi;
86 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
92 * File i/o capability. This tracks shared state with the metadata
93 * server that allows us to cache or writeback attributes or to read
94 * and write data. For any given inode, we should have one or more
95 * capabilities, one issued by each metadata server, and our
96 * cumulative access is the OR of all issued capabilities.
98 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
99 * session capability lists.
102 struct ceph_inode_info *ci;
103 struct rb_node ci_node; /* per-ci cap tree */
104 struct ceph_mds_session *session;
105 struct list_head session_caps; /* per-session caplist */
107 u64 cap_id; /* unique cap id (mds provided) */
108 int issued; /* latest, from the mds */
109 int implemented; /* implemented superset of issued (for revocation) */
111 u32 seq, issue_seq, mseq;
112 u32 cap_gen; /* active/stale cycle */
113 unsigned long last_used;
114 struct list_head caps_item;
117 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
118 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
119 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
122 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
123 * we first complete any in-process sync writes and writeback any dirty
124 * data before flushing the snapped state (tracked here) back to the MDS.
126 struct ceph_cap_snap {
128 struct ceph_inode_info *ci;
129 struct list_head ci_item, flushing_item;
131 u64 follows, flush_tid;
133 struct ceph_snap_context *context;
139 struct ceph_buffer *xattr_blob;
143 struct timespec mtime, atime, ctime;
145 int writing; /* a sync write is still in progress */
146 int dirty_pages; /* dirty pages awaiting writeback */
149 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
151 if (atomic_dec_and_test(&capsnap->nref)) {
152 if (capsnap->xattr_blob)
153 ceph_buffer_put(capsnap->xattr_blob);
159 * The frag tree describes how a directory is fragmented, potentially across
160 * multiple metadata servers. It is also used to indicate points where
161 * metadata authority is delegated, and whether/where metadata is replicated.
163 * A _leaf_ frag will be present in the i_fragtree IFF there is
164 * delegation info. That is, if mds >= 0 || ndist > 0.
166 #define CEPH_MAX_DIRFRAG_REP 4
168 struct ceph_inode_frag {
173 int split_by; /* i.e. 2^(split_by) children */
175 /* delegation and replication info */
176 int mds; /* -1 if same authority as parent */
177 int ndist; /* >0 if replicated */
178 int dist[CEPH_MAX_DIRFRAG_REP];
182 * We cache inode xattrs as an encoded blob until they are first used,
183 * at which point we parse them into an rbtree.
185 struct ceph_inode_xattr {
194 int should_free_name;
201 struct ceph_dentry_info {
202 struct ceph_mds_session *lease_session;
203 u32 lease_gen, lease_shared_gen;
205 unsigned long lease_renew_after, lease_renew_from;
206 struct list_head lru;
207 struct dentry *dentry;
210 struct inode *parent_inode;
213 struct ceph_inode_xattrs_info {
215 * (still encoded) xattr blob. we avoid the overhead of parsing
216 * this until someone actually calls getxattr, etc.
218 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
219 * NULL means we don't know.
221 struct ceph_buffer *blob, *prealloc_blob;
223 struct rb_root index;
228 u64 version, index_version;
234 struct ceph_inode_info {
235 struct ceph_vino i_vino; /* ceph ino + snap */
240 unsigned i_ceph_flags;
241 unsigned long i_release_count;
243 struct ceph_dir_layout i_dir_layout;
244 struct ceph_file_layout i_layout;
248 struct timespec i_rctime;
249 u64 i_rbytes, i_rfiles, i_rsubdirs;
250 u64 i_files, i_subdirs;
251 u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */
253 struct rb_root i_fragtree;
254 struct mutex i_fragtree_mutex;
256 struct ceph_inode_xattrs_info i_xattrs;
258 /* capabilities. protected _both_ by i_lock and cap->session's
260 struct rb_root i_caps; /* cap list */
261 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
262 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
263 struct list_head i_dirty_item, i_flushing_item;
265 /* we need to track cap writeback on a per-cap-bit basis, to allow
266 * overlapping, pipelined cap flushes to the mds. we can probably
267 * reduce the tid to 8 bits if we're concerned about inode size. */
268 u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS];
269 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
270 unsigned long i_hold_caps_min; /* jiffies */
271 unsigned long i_hold_caps_max; /* jiffies */
272 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
273 int i_cap_exporting_mds; /* to handle cap migration between */
274 unsigned i_cap_exporting_mseq; /* mds's. */
275 unsigned i_cap_exporting_issued;
276 struct ceph_cap_reservation i_cap_migration_resv;
277 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
278 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
279 dirty|flushing caps */
280 unsigned i_snap_caps; /* cap bits for snapped files */
282 int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */
284 u32 i_truncate_seq; /* last truncate to smaller size */
285 u64 i_truncate_size; /* and the size we last truncated down to */
286 int i_truncate_pending; /* still need to call vmtruncate */
288 u64 i_max_size; /* max file size authorized by mds */
289 u64 i_reported_size; /* (max_)size reported to or requested of mds */
290 u64 i_wanted_max_size; /* offset we'd like to write too */
291 u64 i_requested_max_size; /* max_size we've requested */
293 /* held references to caps */
295 int i_rd_ref, i_rdcache_ref, i_wr_ref;
296 int i_wrbuffer_ref, i_wrbuffer_ref_head;
297 u32 i_shared_gen; /* increment each time we get FILE_SHARED */
298 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
299 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
301 struct list_head i_unsafe_writes; /* uncommitted sync writes */
302 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
303 spinlock_t i_unsafe_lock;
305 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
306 int i_snap_realm_counter; /* snap realm (if caps) */
307 struct list_head i_snap_realm_item;
308 struct list_head i_snap_flush_item;
310 struct work_struct i_wb_work; /* writeback work */
311 struct work_struct i_pg_inv_work; /* page invalidation work */
313 struct work_struct i_vmtruncate_work;
315 struct inode vfs_inode; /* at end */
318 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
320 return container_of(inode, struct ceph_inode_info, vfs_inode);
323 static inline struct ceph_vino ceph_vino(struct inode *inode)
325 return ceph_inode(inode)->i_vino;
329 * ino_t is <64 bits on many architectures, blech.
331 * don't include snap in ino hash, at least for now.
333 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
335 ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */
336 #if BITS_PER_LONG == 32
337 ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8;
344 /* for printf-style formatting */
345 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
347 static inline u64 ceph_ino(struct inode *inode)
349 return ceph_inode(inode)->i_vino.ino;
351 static inline u64 ceph_snap(struct inode *inode)
353 return ceph_inode(inode)->i_vino.snap;
356 static inline int ceph_ino_compare(struct inode *inode, void *data)
358 struct ceph_vino *pvino = (struct ceph_vino *)data;
359 struct ceph_inode_info *ci = ceph_inode(inode);
360 return ci->i_vino.ino == pvino->ino &&
361 ci->i_vino.snap == pvino->snap;
364 static inline struct inode *ceph_find_inode(struct super_block *sb,
365 struct ceph_vino vino)
367 ino_t t = ceph_vino_to_ino(vino);
368 return ilookup5(sb, t, ceph_ino_compare, &vino);
375 #define CEPH_I_COMPLETE 1 /* we have complete directory cached */
376 #define CEPH_I_NODELAY 4 /* do not delay cap release */
377 #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
378 #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
380 static inline void ceph_i_clear(struct inode *inode, unsigned mask)
382 struct ceph_inode_info *ci = ceph_inode(inode);
384 spin_lock(&inode->i_lock);
385 ci->i_ceph_flags &= ~mask;
386 spin_unlock(&inode->i_lock);
389 static inline void ceph_i_set(struct inode *inode, unsigned mask)
391 struct ceph_inode_info *ci = ceph_inode(inode);
393 spin_lock(&inode->i_lock);
394 ci->i_ceph_flags |= mask;
395 spin_unlock(&inode->i_lock);
398 static inline bool ceph_i_test(struct inode *inode, unsigned mask)
400 struct ceph_inode_info *ci = ceph_inode(inode);
403 spin_lock(&inode->i_lock);
404 r = (ci->i_ceph_flags & mask) == mask;
405 spin_unlock(&inode->i_lock);
410 /* find a specific frag @f */
411 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
415 * choose fragment for value @v. copy frag content to pfrag, if leaf
418 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
419 struct ceph_inode_frag *pfrag,
422 static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
424 return (struct ceph_dentry_info *)dentry->d_fsdata;
427 static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
429 return ((loff_t)frag << 32) | (loff_t)off;
432 static inline int ceph_set_ino_cb(struct inode *inode, void *data)
434 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
435 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
442 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
444 return !RB_EMPTY_ROOT(&ci->i_caps);
447 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
448 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
449 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
450 struct ceph_cap *cap);
452 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
455 spin_lock(&ci->vfs_inode.i_lock);
456 issued = __ceph_caps_issued(ci, NULL);
457 spin_unlock(&ci->vfs_inode.i_lock);
461 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
465 spin_lock(&ci->vfs_inode.i_lock);
466 r = __ceph_caps_issued_mask(ci, mask, touch);
467 spin_unlock(&ci->vfs_inode.i_lock);
471 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
473 return ci->i_dirty_caps | ci->i_flushing_caps;
475 extern void __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask);
477 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
478 extern int __ceph_caps_used(struct ceph_inode_info *ci);
480 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
483 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
485 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
487 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
488 if (w & CEPH_CAP_FILE_BUFFER)
489 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
493 /* what the mds thinks we want */
494 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
496 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
497 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
498 extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
499 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
500 struct ceph_cap_reservation *ctx, int need);
501 extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
502 struct ceph_cap_reservation *ctx);
503 extern void ceph_reservation_status(struct ceph_fs_client *client,
504 int *total, int *avail, int *used,
505 int *reserved, int *min);
507 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
509 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
512 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
514 return (struct ceph_fs_client *)sb->s_fs_info;
519 * we keep buffered readdir results attached to file->private_data
521 struct ceph_file_info {
522 int fmode; /* initialized on open */
524 /* readdir: position within the dir */
526 struct ceph_mds_request *last_readdir;
529 /* readdir: position within a frag */
530 unsigned offset; /* offset of last chunk, adjusted for . and .. */
531 u64 next_offset; /* offset of next chunk (last_name's + 1) */
532 char *last_name; /* last entry in previous chunk */
533 struct dentry *dentry; /* next dentry (for dcache readdir) */
534 unsigned long dir_release_count;
536 /* used for -o dirstat read() on directory thing */
544 * A "snap realm" describes a subset of the file hierarchy sharing
545 * the same set of snapshots that apply to it. The realms themselves
546 * are organized into a hierarchy, such that children inherit (some of)
547 * the snapshots of their parents.
549 * All inodes within the realm that have capabilities are linked into a
552 struct ceph_snap_realm {
559 u64 parent_since; /* snapid when our current parent became so */
561 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
562 int num_prior_parent_snaps; /* had prior to parent_since */
563 u64 *snaps; /* snaps specific to this realm */
566 struct ceph_snap_realm *parent;
567 struct list_head children; /* list of child realms */
568 struct list_head child_item;
570 struct list_head empty_item; /* if i have ref==0 */
572 struct list_head dirty_item; /* if realm needs new context */
574 /* the current set of snaps for this realm */
575 struct ceph_snap_context *cached_context;
577 struct list_head inodes_with_caps;
578 spinlock_t inodes_with_caps_lock;
581 static inline int default_congestion_kb(void)
588 * congestion size, scale with available memory.
600 * This allows larger machines to have larger/more transfers.
601 * Limit the default to 256M
603 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
604 if (congestion_kb > 256*1024)
605 congestion_kb = 256*1024;
607 return congestion_kb;
613 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
615 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
616 struct ceph_snap_realm *realm);
617 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
618 struct ceph_snap_realm *realm);
619 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
620 void *p, void *e, bool deletion);
621 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
622 struct ceph_mds_session *session,
623 struct ceph_msg *msg);
624 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
625 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
626 struct ceph_cap_snap *capsnap);
627 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
630 * a cap_snap is "pending" if it is still awaiting an in-progress
631 * sync write (that may/may not still update size, mtime, etc.).
633 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
635 return !list_empty(&ci->i_cap_snaps) &&
636 list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap,
641 extern const struct inode_operations ceph_file_iops;
643 extern struct inode *ceph_alloc_inode(struct super_block *sb);
644 extern void ceph_destroy_inode(struct inode *inode);
646 extern struct inode *ceph_get_inode(struct super_block *sb,
647 struct ceph_vino vino);
648 extern struct inode *ceph_get_snapdir(struct inode *parent);
649 extern int ceph_fill_file_size(struct inode *inode, int issued,
650 u32 truncate_seq, u64 truncate_size, u64 size);
651 extern void ceph_fill_file_time(struct inode *inode, int issued,
652 u64 time_warp_seq, struct timespec *ctime,
653 struct timespec *mtime, struct timespec *atime);
654 extern int ceph_fill_trace(struct super_block *sb,
655 struct ceph_mds_request *req,
656 struct ceph_mds_session *session);
657 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
658 struct ceph_mds_session *session);
660 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
662 extern int ceph_inode_set_size(struct inode *inode, loff_t size);
663 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
664 extern void ceph_queue_vmtruncate(struct inode *inode);
666 extern void ceph_queue_invalidate(struct inode *inode);
667 extern void ceph_queue_writeback(struct inode *inode);
669 extern int ceph_do_getattr(struct inode *inode, int mask);
670 extern int ceph_permission(struct inode *inode, int mask, unsigned int flags);
671 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
672 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
676 extern int ceph_setxattr(struct dentry *, const char *, const void *,
678 extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
679 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
680 extern int ceph_removexattr(struct dentry *, const char *);
681 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
682 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
685 extern const char *ceph_cap_string(int c);
686 extern void ceph_handle_caps(struct ceph_mds_session *session,
687 struct ceph_msg *msg);
688 extern int ceph_add_cap(struct inode *inode,
689 struct ceph_mds_session *session, u64 cap_id,
690 int fmode, unsigned issued, unsigned wanted,
691 unsigned cap, unsigned seq, u64 realmino, int flags,
692 struct ceph_cap_reservation *caps_reservation);
693 extern void __ceph_remove_cap(struct ceph_cap *cap);
694 static inline void ceph_remove_cap(struct ceph_cap *cap)
696 struct inode *inode = &cap->ci->vfs_inode;
697 spin_lock(&inode->i_lock);
698 __ceph_remove_cap(cap);
699 spin_unlock(&inode->i_lock);
701 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
702 struct ceph_cap *cap);
704 extern void ceph_queue_caps_release(struct inode *inode);
705 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
706 extern int ceph_fsync(struct file *file, int datasync);
707 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
708 struct ceph_mds_session *session);
709 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
711 extern int ceph_get_cap_mds(struct inode *inode);
712 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
713 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
714 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
715 struct ceph_snap_context *snapc);
716 extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
717 struct ceph_mds_session **psession,
719 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
720 struct ceph_mds_session *session);
721 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
722 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
724 extern int ceph_encode_inode_release(void **p, struct inode *inode,
725 int mds, int drop, int unless, int force);
726 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
727 int mds, int drop, int unless);
729 extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
730 int *got, loff_t endoff);
732 /* for counting open files by mode */
733 static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
735 ci->i_nr_by_mode[mode]++;
737 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
740 extern const struct address_space_operations ceph_aops;
741 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
744 extern const struct file_operations ceph_file_fops;
745 extern const struct address_space_operations ceph_aops;
746 extern int ceph_copy_to_page_vector(struct page **pages,
748 loff_t off, size_t len);
749 extern int ceph_copy_from_page_vector(struct page **pages,
751 loff_t off, size_t len);
752 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
753 extern int ceph_open(struct inode *inode, struct file *file);
754 extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
755 struct nameidata *nd, int mode,
757 extern int ceph_release(struct inode *inode, struct file *filp);
760 extern const struct file_operations ceph_dir_fops;
761 extern const struct inode_operations ceph_dir_iops;
762 extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
763 ceph_snapdir_dentry_ops;
765 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
766 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
767 struct dentry *dentry, int err);
769 extern void ceph_dentry_lru_add(struct dentry *dn);
770 extern void ceph_dentry_lru_touch(struct dentry *dn);
771 extern void ceph_dentry_lru_del(struct dentry *dn);
772 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
773 extern unsigned ceph_dentry_hash(struct dentry *dn);
776 * our d_ops vary depending on whether the inode is live,
777 * snapshotted (read-only), or a virtual ".snap" directory.
779 int ceph_init_dentry(struct dentry *dentry);
783 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
786 extern const struct export_operations ceph_export_ops;
789 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
790 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
791 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
792 extern int ceph_encode_locks(struct inode *i, struct ceph_pagelist *p,
793 int p_locks, int f_locks);
794 extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
796 static inline struct inode *get_dentry_parent_inode(struct dentry *dentry)
798 if (dentry && dentry->d_parent)
799 return dentry->d_parent->d_inode;
805 extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
806 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
808 #endif /* _FS_CEPH_SUPER_H */