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-rw-r--r--fs/ceph/super.h890
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diff --git a/fs/ceph/super.h b/fs/ceph/super.h
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1#ifndef _FS_CEPH_SUPER_H
2#define _FS_CEPH_SUPER_H
3
4#include "ceph_debug.h"
5
6#include <asm/unaligned.h>
7#include <linux/backing-dev.h>
8#include <linux/completion.h>
9#include <linux/exportfs.h>
10#include <linux/fs.h>
11#include <linux/mempool.h>
12#include <linux/pagemap.h>
13#include <linux/wait.h>
14
15#include "types.h"
16#include "messenger.h"
17#include "msgpool.h"
18#include "mon_client.h"
19#include "mds_client.h"
20#include "osd_client.h"
21#include "ceph_fs.h"
22
23/* f_type in struct statfs */
24#define CEPH_SUPER_MAGIC 0x00c36400
25
26/* large granularity for statfs utilization stats to facilitate
27 * large volume sizes on 32-bit machines. */
28#define CEPH_BLOCK_SHIFT 20 /* 1 MB */
29#define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
30
31/*
32 * mount options
33 */
34#define CEPH_OPT_FSID (1<<0)
35#define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */
36#define CEPH_OPT_MYIP (1<<2) /* specified my ip */
37#define CEPH_OPT_DIRSTAT (1<<4) /* funky `cat dirname` for stats */
38#define CEPH_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
39#define CEPH_OPT_NOCRC (1<<6) /* no data crc on writes */
40#define CEPH_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
41
42#define CEPH_OPT_DEFAULT (CEPH_OPT_RBYTES)
43
44#define ceph_set_opt(client, opt) \
45 (client)->mount_args.flags |= CEPH_OPT_##opt;
46#define ceph_test_opt(client, opt) \
47 (!!((client)->mount_args.flags & CEPH_OPT_##opt))
48
49
50#define CEPH_MAX_MON_MOUNT_ADDR 5
51
52struct ceph_mount_args {
53 int sb_flags;
54 int flags;
55 int mount_timeout;
56 int caps_wanted_delay_min, caps_wanted_delay_max;
57 struct ceph_fsid fsid;
58 struct ceph_entity_addr my_addr;
59 int wsize;
60 int rsize; /* max readahead */
61 int max_readdir; /* max readdir size */
62 int osd_timeout;
63 char *snapdir_name; /* default ".snap" */
64 char *secret;
65 int cap_release_safety;
66};
67
68/*
69 * defaults
70 */
71#define CEPH_MOUNT_TIMEOUT_DEFAULT 60
72#define CEPH_MOUNT_RSIZE_DEFAULT (128*1024) /* readahead */
73
74#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
75#define CEPH_MSG_MAX_DATA_LEN (16*1024*1024)
76
77#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
78
79/*
80 * Delay telling the MDS we no longer want caps, in case we reopen
81 * the file. Delay a minimum amount of time, even if we send a cap
82 * message for some other reason. Otherwise, take the oppotunity to
83 * update the mds to avoid sending another message later.
84 */
85#define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
86#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
87
88
89/* mount state */
90enum {
91 CEPH_MOUNT_MOUNTING,
92 CEPH_MOUNT_MOUNTED,
93 CEPH_MOUNT_UNMOUNTING,
94 CEPH_MOUNT_UNMOUNTED,
95 CEPH_MOUNT_SHUTDOWN,
96};
97
98/*
99 * subtract jiffies
100 */
101static inline unsigned long time_sub(unsigned long a, unsigned long b)
102{
103 BUG_ON(time_after(b, a));
104 return (long)a - (long)b;
105}
106
107/*
108 * per-filesystem client state
109 *
110 * possibly shared by multiple mount points, if they are
111 * mounting the same ceph filesystem/cluster.
112 */
113struct ceph_client {
114 __s64 whoami; /* my client number */
115 struct dentry *debugfs_monmap;
116 struct dentry *debugfs_mdsmap, *debugfs_osdmap;
117 struct dentry *debugfs_dir, *debugfs_dentry_lru, *debugfs_caps;
118
119 struct mutex mount_mutex; /* serialize mount attempts */
120 struct ceph_mount_args mount_args;
121 struct ceph_fsid fsid;
122
123 struct super_block *sb;
124
125 unsigned long mount_state;
126 wait_queue_head_t mount_wq;
127
128 int mount_err;
129 void *signed_ticket; /* our keys to the kingdom */
130 int signed_ticket_len;
131
132 struct ceph_messenger *msgr; /* messenger instance */
133 struct ceph_mon_client monc;
134 struct ceph_mds_client mdsc;
135 struct ceph_osd_client osdc;
136
137 /* writeback */
138 mempool_t *wb_pagevec_pool;
139 struct workqueue_struct *wb_wq;
140 struct workqueue_struct *pg_inv_wq;
141 struct workqueue_struct *trunc_wq;
142
143 struct backing_dev_info backing_dev_info;
144};
145
146static inline struct ceph_client *ceph_client(struct super_block *sb)
147{
148 return sb->s_fs_info;
149}
150
151
152/*
153 * File i/o capability. This tracks shared state with the metadata
154 * server that allows us to cache or writeback attributes or to read
155 * and write data. For any given inode, we should have one or more
156 * capabilities, one issued by each metadata server, and our
157 * cumulative access is the OR of all issued capabilities.
158 *
159 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
160 * session capability lists.
161 */
162struct ceph_cap {
163 struct ceph_inode_info *ci;
164 struct rb_node ci_node; /* per-ci cap tree */
165 struct ceph_mds_session *session;
166 struct list_head session_caps; /* per-session caplist */
167 int mds;
168 u64 cap_id; /* unique cap id (mds provided) */
169 int issued; /* latest, from the mds */
170 int implemented; /* implemented superset of issued (for revocation) */
171 int mds_wanted;
172 u32 seq, issue_seq, mseq, gen;
173 unsigned long last_used;
174 struct list_head caps_item;
175};
176
177#define CHECK_CAPS_NODELAY 1 /* do not delay any further */
178#define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
179#define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
180
181/*
182 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
183 * we first complete any in-process sync writes and writeback any dirty
184 * data before flushing the snapped state (tracked here) back to the MDS.
185 */
186struct ceph_cap_snap {
187 atomic_t nref;
188 struct ceph_inode_info *ci;
189 struct list_head ci_item, flushing_item;
190
191 u64 follows, flush_tid;
192 int issued, dirty;
193 struct ceph_snap_context *context;
194
195 mode_t mode;
196 uid_t uid;
197 gid_t gid;
198
199 void *xattr_blob;
200 int xattr_len;
201 u64 xattr_version;
202
203 u64 size;
204 struct timespec mtime, atime, ctime;
205 u64 time_warp_seq;
206 int writing; /* a sync write is still in progress */
207 int dirty_pages; /* dirty pages awaiting writeback */
208};
209
210static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
211{
212 if (atomic_dec_and_test(&capsnap->nref))
213 kfree(capsnap);
214}
215
216/*
217 * The frag tree describes how a directory is fragmented, potentially across
218 * multiple metadata servers. It is also used to indicate points where
219 * metadata authority is delegated, and whether/where metadata is replicated.
220 *
221 * A _leaf_ frag will be present in the i_fragtree IFF there is
222 * delegation info. That is, if mds >= 0 || ndist > 0.
223 */
224#define CEPH_MAX_DIRFRAG_REP 4
225
226struct ceph_inode_frag {
227 struct rb_node node;
228
229 /* fragtree state */
230 u32 frag;
231 int split_by; /* i.e. 2^(split_by) children */
232
233 /* delegation and replication info */
234 int mds; /* -1 if same authority as parent */
235 int ndist; /* >0 if replicated */
236 int dist[CEPH_MAX_DIRFRAG_REP];
237};
238
239/*
240 * We cache inode xattrs as an encoded blob until they are first used,
241 * at which point we parse them into an rbtree.
242 */
243struct ceph_inode_xattr {
244 struct rb_node node;
245
246 const char *name;
247 int name_len;
248 const char *val;
249 int val_len;
250 int dirty;
251
252 int should_free_name;
253 int should_free_val;
254};
255
256struct ceph_inode_xattrs_info {
257 /*
258 * (still encoded) xattr blob. we avoid the overhead of parsing
259 * this until someone actually calls getxattr, etc.
260 *
261 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
262 * NULL means we don't know.
263 */
264 struct ceph_buffer *blob, *prealloc_blob;
265
266 struct rb_root index;
267 bool dirty;
268 int count;
269 int names_size;
270 int vals_size;
271 u64 version, index_version;
272};
273
274/*
275 * Ceph inode.
276 */
277#define CEPH_I_COMPLETE 1 /* we have complete directory cached */
278#define CEPH_I_NODELAY 4 /* do not delay cap release */
279#define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
280
281struct ceph_inode_info {
282 struct ceph_vino i_vino; /* ceph ino + snap */
283
284 u64 i_version;
285 u32 i_time_warp_seq;
286
287 unsigned i_ceph_flags;
288 unsigned long i_release_count;
289
290 struct ceph_file_layout i_layout;
291 char *i_symlink;
292
293 /* for dirs */
294 struct timespec i_rctime;
295 u64 i_rbytes, i_rfiles, i_rsubdirs;
296 u64 i_files, i_subdirs;
297 u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */
298
299 struct rb_root i_fragtree;
300 struct mutex i_fragtree_mutex;
301
302 struct ceph_inode_xattrs_info i_xattrs;
303
304 /* capabilities. protected _both_ by i_lock and cap->session's
305 * s_mutex. */
306 struct rb_root i_caps; /* cap list */
307 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
308 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
309 struct list_head i_dirty_item, i_flushing_item;
310 u64 i_cap_flush_seq;
311 /* we need to track cap writeback on a per-cap-bit basis, to allow
312 * overlapping, pipelined cap flushes to the mds. we can probably
313 * reduce the tid to 8 bits if we're concerned about inode size. */
314 u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS];
315 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
316 unsigned long i_hold_caps_min; /* jiffies */
317 unsigned long i_hold_caps_max; /* jiffies */
318 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
319 int i_cap_exporting_mds; /* to handle cap migration between */
320 unsigned i_cap_exporting_mseq; /* mds's. */
321 unsigned i_cap_exporting_issued;
322 struct ceph_cap_reservation i_cap_migration_resv;
323 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
324 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 */
325 unsigned i_snap_caps; /* cap bits for snapped files */
326
327 int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */
328
329 u32 i_truncate_seq; /* last truncate to smaller size */
330 u64 i_truncate_size; /* and the size we last truncated down to */
331 int i_truncate_pending; /* still need to call vmtruncate */
332
333 u64 i_max_size; /* max file size authorized by mds */
334 u64 i_reported_size; /* (max_)size reported to or requested of mds */
335 u64 i_wanted_max_size; /* offset we'd like to write too */
336 u64 i_requested_max_size; /* max_size we've requested */
337
338 /* held references to caps */
339 int i_pin_ref;
340 int i_rd_ref, i_rdcache_ref, i_wr_ref;
341 int i_wrbuffer_ref, i_wrbuffer_ref_head;
342 u32 i_shared_gen; /* increment each time we get FILE_SHARED */
343 u32 i_rdcache_gen; /* we increment this each time we get
344 FILE_CACHE. If it's non-zero, we
345 _may_ have cached pages. */
346 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
347
348 struct list_head i_unsafe_writes; /* uncommitted sync writes */
349 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
350 spinlock_t i_unsafe_lock;
351
352 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
353 int i_snap_realm_counter; /* snap realm (if caps) */
354 struct list_head i_snap_realm_item;
355 struct list_head i_snap_flush_item;
356
357 struct work_struct i_wb_work; /* writeback work */
358 struct work_struct i_pg_inv_work; /* page invalidation work */
359
360 struct work_struct i_vmtruncate_work;
361
362 struct inode vfs_inode; /* at end */
363};
364
365static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
366{
367 return list_entry(inode, struct ceph_inode_info, vfs_inode);
368}
369
370static inline void ceph_i_clear(struct inode *inode, unsigned mask)
371{
372 struct ceph_inode_info *ci = ceph_inode(inode);
373
374 spin_lock(&inode->i_lock);
375 ci->i_ceph_flags &= ~mask;
376 spin_unlock(&inode->i_lock);
377}
378
379static inline void ceph_i_set(struct inode *inode, unsigned mask)
380{
381 struct ceph_inode_info *ci = ceph_inode(inode);
382
383 spin_lock(&inode->i_lock);
384 ci->i_ceph_flags |= mask;
385 spin_unlock(&inode->i_lock);
386}
387
388static inline bool ceph_i_test(struct inode *inode, unsigned mask)
389{
390 struct ceph_inode_info *ci = ceph_inode(inode);
391 bool r;
392
393 smp_mb();
394 r = (ci->i_ceph_flags & mask) == mask;
395 return r;
396}
397
398
399/* find a specific frag @f */
400extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
401 u32 f);
402
403/*
404 * choose fragment for value @v. copy frag content to pfrag, if leaf
405 * exists
406 */
407extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
408 struct ceph_inode_frag *pfrag,
409 int *found);
410
411/*
412 * Ceph dentry state
413 */
414struct ceph_dentry_info {
415 struct ceph_mds_session *lease_session;
416 u32 lease_gen, lease_shared_gen;
417 u32 lease_seq;
418 unsigned long lease_renew_after, lease_renew_from;
419 struct list_head lru;
420 struct dentry *dentry;
421 u64 time;
422 u64 offset;
423};
424
425static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
426{
427 return (struct ceph_dentry_info *)dentry->d_fsdata;
428}
429
430static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
431{
432 return ((loff_t)frag << 32) | (loff_t)off;
433}
434
435/*
436 * ino_t is <64 bits on many architectures, blech.
437 *
438 * don't include snap in ino hash, at least for now.
439 */
440static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
441{
442 ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */
443#if BITS_PER_LONG == 32
444 ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8;
445 if (!ino)
446 ino = 1;
447#endif
448 return ino;
449}
450
451static inline int ceph_set_ino_cb(struct inode *inode, void *data)
452{
453 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
454 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
455 return 0;
456}
457
458static inline struct ceph_vino ceph_vino(struct inode *inode)
459{
460 return ceph_inode(inode)->i_vino;
461}
462
463/* for printf-style formatting */
464#define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
465
466static inline u64 ceph_ino(struct inode *inode)
467{
468 return ceph_inode(inode)->i_vino.ino;
469}
470static inline u64 ceph_snap(struct inode *inode)
471{
472 return ceph_inode(inode)->i_vino.snap;
473}
474
475static inline int ceph_ino_compare(struct inode *inode, void *data)
476{
477 struct ceph_vino *pvino = (struct ceph_vino *)data;
478 struct ceph_inode_info *ci = ceph_inode(inode);
479 return ci->i_vino.ino == pvino->ino &&
480 ci->i_vino.snap == pvino->snap;
481}
482
483static inline struct inode *ceph_find_inode(struct super_block *sb,
484 struct ceph_vino vino)
485{
486 ino_t t = ceph_vino_to_ino(vino);
487 return ilookup5(sb, t, ceph_ino_compare, &vino);
488}
489
490
491/*
492 * caps helpers
493 */
494static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
495{
496 return !RB_EMPTY_ROOT(&ci->i_caps);
497}
498
499extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
500extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
501extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
502 struct ceph_cap *cap);
503
504static inline int ceph_caps_issued(struct ceph_inode_info *ci)
505{
506 int issued;
507 spin_lock(&ci->vfs_inode.i_lock);
508 issued = __ceph_caps_issued(ci, NULL);
509 spin_unlock(&ci->vfs_inode.i_lock);
510 return issued;
511}
512
513static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
514 int touch)
515{
516 int r;
517 spin_lock(&ci->vfs_inode.i_lock);
518 r = __ceph_caps_issued_mask(ci, mask, touch);
519 spin_unlock(&ci->vfs_inode.i_lock);
520 return r;
521}
522
523static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
524{
525 return ci->i_dirty_caps | ci->i_flushing_caps;
526}
527extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask);
528
529extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
530extern int __ceph_caps_used(struct ceph_inode_info *ci);
531
532extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
533
534/*
535 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
536 */
537static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
538{
539 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
540 if (w & CEPH_CAP_FILE_BUFFER)
541 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
542 return w;
543}
544
545/* what the mds thinks we want */
546extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
547
548extern void ceph_caps_init(void);
549extern void ceph_caps_finalize(void);
550extern int ceph_reserve_caps(struct ceph_cap_reservation *ctx, int need);
551extern int ceph_unreserve_caps(struct ceph_cap_reservation *ctx);
552extern void ceph_reservation_status(struct ceph_client *client,
553 int *total, int *avail, int *used,
554 int *reserved);
555
556static inline struct ceph_client *ceph_inode_to_client(struct inode *inode)
557{
558 return (struct ceph_client *)inode->i_sb->s_fs_info;
559}
560
561static inline struct ceph_client *ceph_sb_to_client(struct super_block *sb)
562{
563 return (struct ceph_client *)sb->s_fs_info;
564}
565
566static inline int ceph_queue_writeback(struct inode *inode)
567{
568 return queue_work(ceph_inode_to_client(inode)->wb_wq,
569 &ceph_inode(inode)->i_wb_work);
570}
571
572static inline int ceph_queue_page_invalidation(struct inode *inode)
573{
574 return queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
575 &ceph_inode(inode)->i_pg_inv_work);
576}
577
578
579/*
580 * we keep buffered readdir results attached to file->private_data
581 */
582struct ceph_file_info {
583 int fmode; /* initialized on open */
584
585 /* readdir: position within the dir */
586 u32 frag;
587 struct ceph_mds_request *last_readdir;
588 int at_end;
589
590 /* readdir: position within a frag */
591 unsigned offset; /* offset of last chunk, adjusted for . and .. */
592 u64 next_offset; /* offset of next chunk (last_name's + 1) */
593 char *last_name; /* last entry in previous chunk */
594 struct dentry *dentry; /* next dentry (for dcache readdir) */
595 unsigned long dir_release_count;
596
597 /* used for -o dirstat read() on directory thing */
598 char *dir_info;
599 int dir_info_len;
600};
601
602
603
604/*
605 * snapshots
606 */
607
608/*
609 * A "snap context" is the set of existing snapshots when we
610 * write data. It is used by the OSD to guide its COW behavior.
611 *
612 * The ceph_snap_context is refcounted, and attached to each dirty
613 * page, indicating which context the dirty data belonged when it was
614 * dirtied.
615 */
616struct ceph_snap_context {
617 atomic_t nref;
618 u64 seq;
619 int num_snaps;
620 u64 snaps[];
621};
622
623static inline struct ceph_snap_context *
624ceph_get_snap_context(struct ceph_snap_context *sc)
625{
626 /*
627 printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
628 atomic_read(&sc->nref)+1);
629 */
630 if (sc)
631 atomic_inc(&sc->nref);
632 return sc;
633}
634
635static inline void ceph_put_snap_context(struct ceph_snap_context *sc)
636{
637 if (!sc)
638 return;
639 /*
640 printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
641 atomic_read(&sc->nref)-1);
642 */
643 if (atomic_dec_and_test(&sc->nref)) {
644 /*printk(" deleting snap_context %p\n", sc);*/
645 kfree(sc);
646 }
647}
648
649/*
650 * A "snap realm" describes a subset of the file hierarchy sharing
651 * the same set of snapshots that apply to it. The realms themselves
652 * are organized into a hierarchy, such that children inherit (some of)
653 * the snapshots of their parents.
654 *
655 * All inodes within the realm that have capabilities are linked into a
656 * per-realm list.
657 */
658struct ceph_snap_realm {
659 u64 ino;
660 atomic_t nref;
661 u64 created, seq;
662 u64 parent_ino;
663 u64 parent_since; /* snapid when our current parent became so */
664
665 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
666 int num_prior_parent_snaps; /* had prior to parent_since */
667 u64 *snaps; /* snaps specific to this realm */
668 int num_snaps;
669
670 struct ceph_snap_realm *parent;
671 struct list_head children; /* list of child realms */
672 struct list_head child_item;
673
674 struct list_head empty_item; /* if i have ref==0 */
675
676 /* the current set of snaps for this realm */
677 struct ceph_snap_context *cached_context;
678
679 struct list_head inodes_with_caps;
680 spinlock_t inodes_with_caps_lock;
681};
682
683
684
685/*
686 * calculate the number of pages a given length and offset map onto,
687 * if we align the data.
688 */
689static inline int calc_pages_for(u64 off, u64 len)
690{
691 return ((off+len+PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) -
692 (off >> PAGE_CACHE_SHIFT);
693}
694
695
696
697/* snap.c */
698struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
699 u64 ino);
700extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
701 struct ceph_snap_realm *realm);
702extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
703 struct ceph_snap_realm *realm);
704extern int ceph_update_snap_trace(struct ceph_mds_client *m,
705 void *p, void *e, bool deletion);
706extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
707 struct ceph_msg *msg);
708extern void ceph_queue_cap_snap(struct ceph_inode_info *ci,
709 struct ceph_snap_context *snapc);
710extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
711 struct ceph_cap_snap *capsnap);
712extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
713
714/*
715 * a cap_snap is "pending" if it is still awaiting an in-progress
716 * sync write (that may/may not still update size, mtime, etc.).
717 */
718static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
719{
720 return !list_empty(&ci->i_cap_snaps) &&
721 list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap,
722 ci_item)->writing;
723}
724
725
726/* super.c */
727extern struct kmem_cache *ceph_inode_cachep;
728extern struct kmem_cache *ceph_cap_cachep;
729extern struct kmem_cache *ceph_dentry_cachep;
730extern struct kmem_cache *ceph_file_cachep;
731
732extern const char *ceph_msg_type_name(int type);
733
734#define FSID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
735 "%02x%02x%02x%02x%02x%02x"
736#define PR_FSID(f) (f)->fsid[0], (f)->fsid[1], (f)->fsid[2], (f)->fsid[3], \
737 (f)->fsid[4], (f)->fsid[5], (f)->fsid[6], (f)->fsid[7], \
738 (f)->fsid[8], (f)->fsid[9], (f)->fsid[10], (f)->fsid[11], \
739 (f)->fsid[12], (f)->fsid[13], (f)->fsid[14], (f)->fsid[15]
740
741/* inode.c */
742extern const struct inode_operations ceph_file_iops;
743
744extern struct inode *ceph_alloc_inode(struct super_block *sb);
745extern void ceph_destroy_inode(struct inode *inode);
746
747extern struct inode *ceph_get_inode(struct super_block *sb,
748 struct ceph_vino vino);
749extern struct inode *ceph_get_snapdir(struct inode *parent);
750extern int ceph_fill_file_size(struct inode *inode, int issued,
751 u32 truncate_seq, u64 truncate_size, u64 size);
752extern void ceph_fill_file_time(struct inode *inode, int issued,
753 u64 time_warp_seq, struct timespec *ctime,
754 struct timespec *mtime, struct timespec *atime);
755extern int ceph_fill_trace(struct super_block *sb,
756 struct ceph_mds_request *req,
757 struct ceph_mds_session *session);
758extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
759 struct ceph_mds_session *session);
760
761extern int ceph_inode_holds_cap(struct inode *inode, int mask);
762
763extern int ceph_inode_set_size(struct inode *inode, loff_t size);
764extern void ceph_inode_writeback(struct work_struct *work);
765extern void ceph_vmtruncate_work(struct work_struct *work);
766extern void __ceph_do_pending_vmtruncate(struct inode *inode);
767extern void __ceph_queue_vmtruncate(struct inode *inode);
768
769extern int ceph_do_getattr(struct inode *inode, int mask);
770extern int ceph_permission(struct inode *inode, int mask);
771extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
772extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
773 struct kstat *stat);
774
775/* xattr.c */
776extern int ceph_setxattr(struct dentry *, const char *, const void *,
777 size_t, int);
778extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
779extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
780extern int ceph_removexattr(struct dentry *, const char *);
781extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
782extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
783
784/* caps.c */
785extern const char *ceph_cap_string(int c);
786extern void ceph_handle_caps(struct ceph_mds_session *session,
787 struct ceph_msg *msg);
788extern int ceph_add_cap(struct inode *inode,
789 struct ceph_mds_session *session, u64 cap_id,
790 int fmode, unsigned issued, unsigned wanted,
791 unsigned cap, unsigned seq, u64 realmino, int flags,
792 struct ceph_cap_reservation *caps_reservation);
793extern void __ceph_remove_cap(struct ceph_cap *cap,
794 struct ceph_cap_reservation *ctx);
795static inline void ceph_remove_cap(struct ceph_cap *cap)
796{
797 struct inode *inode = &cap->ci->vfs_inode;
798 spin_lock(&inode->i_lock);
799 __ceph_remove_cap(cap, NULL);
800 spin_unlock(&inode->i_lock);
801}
802
803extern void ceph_queue_caps_release(struct inode *inode);
804extern int ceph_write_inode(struct inode *inode, int unused);
805extern int ceph_fsync(struct file *file, struct dentry *dentry, int datasync);
806extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
807 struct ceph_mds_session *session);
808extern int ceph_get_cap_mds(struct inode *inode);
809extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
810extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
811extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
812 struct ceph_snap_context *snapc);
813extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
814 struct ceph_mds_session **psession);
815extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
816 struct ceph_mds_session *session);
817extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc,
818 int flushdirty);
819
820extern int ceph_encode_inode_release(void **p, struct inode *inode,
821 int mds, int drop, int unless, int force);
822extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
823 int mds, int drop, int unless);
824
825extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
826 int *got, loff_t endoff);
827
828/* for counting open files by mode */
829static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
830{
831 ci->i_nr_by_mode[mode]++;
832}
833extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
834
835/* addr.c */
836extern const struct address_space_operations ceph_aops;
837extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
838
839/* file.c */
840extern const struct file_operations ceph_file_fops;
841extern const struct address_space_operations ceph_aops;
842extern int ceph_open(struct inode *inode, struct file *file);
843extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
844 struct nameidata *nd, int mode,
845 int locked_dir);
846extern int ceph_release(struct inode *inode, struct file *filp);
847extern void ceph_release_page_vector(struct page **pages, int num_pages);
848
849/* dir.c */
850extern const struct file_operations ceph_dir_fops;
851extern const struct inode_operations ceph_dir_iops;
852extern struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
853 ceph_snapdir_dentry_ops;
854
855extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
856extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
857 struct dentry *dentry, int err);
858
859extern void ceph_dentry_lru_add(struct dentry *dn);
860extern void ceph_dentry_lru_touch(struct dentry *dn);
861extern void ceph_dentry_lru_del(struct dentry *dn);
862
863/*
864 * our d_ops vary depending on whether the inode is live,
865 * snapshotted (read-only), or a virtual ".snap" directory.
866 */
867int ceph_init_dentry(struct dentry *dentry);
868
869
870/* ioctl.c */
871extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
872
873/* export.c */
874extern const struct export_operations ceph_export_ops;
875
876/* debugfs.c */
877extern int ceph_debugfs_init(void);
878extern void ceph_debugfs_cleanup(void);
879extern int ceph_debugfs_client_init(struct ceph_client *client);
880extern void ceph_debugfs_client_cleanup(struct ceph_client *client);
881
882static inline struct inode *get_dentry_parent_inode(struct dentry *dentry)
883{
884 if (dentry && dentry->d_parent)
885 return dentry->d_parent->d_inode;
886
887 return NULL;
888}
889
890#endif /* _FS_CEPH_SUPER_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 21:42:34 -0500