1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _FS_CEPH_SUPER_H |
3 | #define _FS_CEPH_SUPER_H |
4 | |
5 | #include <linux/ceph/ceph_debug.h> |
6 | |
7 | #include <asm/unaligned.h> |
8 | #include <linux/backing-dev.h> |
9 | #include <linux/completion.h> |
10 | #include <linux/exportfs.h> |
11 | #include <linux/fs.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> |
19 | #include <linux/security.h> |
20 | #include <linux/netfs.h> |
21 | #include <linux/fscache.h> |
22 | #include <linux/hashtable.h> |
23 | |
24 | #include <linux/ceph/libceph.h> |
25 | #include "crypto.h" |
26 | |
27 | /* large granularity for statfs utilization stats to facilitate |
28 | * large volume sizes on 32-bit machines. */ |
29 | #define CEPH_BLOCK_SHIFT 22 /* 4 MB */ |
30 | #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) |
31 | #define CEPH_4K_BLOCK_SHIFT 12 /* 4 KB */ |
32 | |
33 | #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */ |
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 */ |
44 | #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */ |
45 | #define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache altogether */ |
46 | #define CEPH_MOUNT_OPT_SPARSEREAD (1<<17) /* always do sparse reads */ |
47 | |
48 | #define CEPH_MOUNT_OPT_DEFAULT \ |
49 | (CEPH_MOUNT_OPT_DCACHE | \ |
50 | CEPH_MOUNT_OPT_NOCOPYFROM | \ |
51 | CEPH_MOUNT_OPT_ASYNC_DIROPS) |
52 | |
53 | #define ceph_set_mount_opt(fsc, opt) \ |
54 | (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt |
55 | #define ceph_clear_mount_opt(fsc, opt) \ |
56 | (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt |
57 | #define ceph_test_mount_opt(fsc, opt) \ |
58 | (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) |
59 | |
60 | /* max size of osd read request, limited by libceph */ |
61 | #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN |
62 | /* osd has a configurable limitaion of max write size. |
63 | * CEPH_MSG_MAX_DATA_LEN should be small enough. */ |
64 | #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN |
65 | #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ |
66 | #define CEPH_MAX_READDIR_DEFAULT 1024 |
67 | #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) |
68 | #define CEPH_SNAPDIRNAME_DEFAULT ".snap" |
69 | |
70 | /* |
71 | * Delay telling the MDS we no longer want caps, in case we reopen |
72 | * the file. Delay a minimum amount of time, even if we send a cap |
73 | * message for some other reason. Otherwise, take the oppotunity to |
74 | * update the mds to avoid sending another message later. |
75 | */ |
76 | #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ |
77 | #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ |
78 | |
79 | struct ceph_mount_options { |
80 | unsigned int flags; |
81 | |
82 | unsigned int wsize; /* max write size */ |
83 | unsigned int rsize; /* max read size */ |
84 | unsigned int rasize; /* max readahead */ |
85 | unsigned int congestion_kb; /* max writeback in flight */ |
86 | unsigned int caps_wanted_delay_min, caps_wanted_delay_max; |
87 | int caps_max; |
88 | unsigned int max_readdir; /* max readdir result (entries) */ |
89 | unsigned int max_readdir_bytes; /* max readdir result (bytes) */ |
90 | |
91 | bool new_dev_syntax; |
92 | |
93 | /* |
94 | * everything above this point can be memcmp'd; everything below |
95 | * is handled in compare_mount_options() |
96 | */ |
97 | |
98 | char *snapdir_name; /* default ".snap" */ |
99 | char *mds_namespace; /* default NULL */ |
100 | char *server_path; /* default NULL (means "/") */ |
101 | char *fscache_uniq; /* default NULL */ |
102 | char *mon_addr; |
103 | struct fscrypt_dummy_policy dummy_enc_policy; |
104 | }; |
105 | |
106 | /* mount state */ |
107 | enum { |
108 | CEPH_MOUNT_MOUNTING, |
109 | CEPH_MOUNT_MOUNTED, |
110 | CEPH_MOUNT_UNMOUNTING, |
111 | CEPH_MOUNT_UNMOUNTED, |
112 | CEPH_MOUNT_SHUTDOWN, |
113 | CEPH_MOUNT_RECOVER, |
114 | CEPH_MOUNT_FENCE_IO, |
115 | }; |
116 | |
117 | #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8 |
118 | |
119 | struct ceph_fs_client { |
120 | struct super_block *sb; |
121 | |
122 | struct list_head metric_wakeup; |
123 | |
124 | struct ceph_mount_options *mount_options; |
125 | struct ceph_client *client; |
126 | |
127 | int mount_state; |
128 | |
129 | bool blocklisted; |
130 | |
131 | bool have_copy_from2; |
132 | |
133 | u32 filp_gen; |
134 | loff_t max_file_size; |
135 | |
136 | struct ceph_mds_client *mdsc; |
137 | |
138 | atomic_long_t writeback_count; |
139 | bool write_congested; |
140 | |
141 | struct workqueue_struct *inode_wq; |
142 | struct workqueue_struct *cap_wq; |
143 | |
144 | DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS); |
145 | spinlock_t async_unlink_conflict_lock; |
146 | |
147 | #ifdef CONFIG_DEBUG_FS |
148 | struct dentry *debugfs_dentry_lru, *debugfs_caps; |
149 | struct dentry *debugfs_congestion_kb; |
150 | struct dentry *debugfs_bdi; |
151 | struct dentry *debugfs_mdsc, *debugfs_mdsmap; |
152 | struct dentry *debugfs_status; |
153 | struct dentry *debugfs_mds_sessions; |
154 | struct dentry *debugfs_metrics_dir; |
155 | #endif |
156 | |
157 | #ifdef CONFIG_CEPH_FSCACHE |
158 | struct fscache_volume *fscache; |
159 | #endif |
160 | #ifdef CONFIG_FS_ENCRYPTION |
161 | struct fscrypt_dummy_policy fsc_dummy_enc_policy; |
162 | #endif |
163 | }; |
164 | |
165 | /* |
166 | * File i/o capability. This tracks shared state with the metadata |
167 | * server that allows us to cache or writeback attributes or to read |
168 | * and write data. For any given inode, we should have one or more |
169 | * capabilities, one issued by each metadata server, and our |
170 | * cumulative access is the OR of all issued capabilities. |
171 | * |
172 | * Each cap is referenced by the inode's i_caps rbtree and by per-mds |
173 | * session capability lists. |
174 | */ |
175 | struct ceph_cap { |
176 | struct ceph_inode_info *ci; |
177 | struct rb_node ci_node; /* per-ci cap tree */ |
178 | struct ceph_mds_session *session; |
179 | struct list_head session_caps; /* per-session caplist */ |
180 | u64 cap_id; /* unique cap id (mds provided) */ |
181 | union { |
182 | /* in-use caps */ |
183 | struct { |
184 | int issued; /* latest, from the mds */ |
185 | int implemented; /* implemented superset of |
186 | issued (for revocation) */ |
187 | int mds; /* mds index for this cap */ |
188 | int mds_wanted; /* caps wanted from this mds */ |
189 | }; |
190 | /* caps to release */ |
191 | struct { |
192 | u64 cap_ino; |
193 | int queue_release; |
194 | }; |
195 | }; |
196 | u32 seq, issue_seq, mseq; |
197 | u32 cap_gen; /* active/stale cycle */ |
198 | unsigned long last_used; |
199 | struct list_head caps_item; |
200 | }; |
201 | |
202 | #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */ |
203 | #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */ |
204 | #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */ |
205 | |
206 | struct ceph_cap_flush { |
207 | u64 tid; |
208 | int caps; |
209 | bool wake; /* wake up flush waiters when finish ? */ |
210 | bool is_capsnap; /* true means capsnap */ |
211 | struct list_head g_list; // global |
212 | struct list_head i_list; // per inode |
213 | }; |
214 | |
215 | /* |
216 | * Snapped cap state that is pending flush to mds. When a snapshot occurs, |
217 | * we first complete any in-process sync writes and writeback any dirty |
218 | * data before flushing the snapped state (tracked here) back to the MDS. |
219 | */ |
220 | struct ceph_cap_snap { |
221 | refcount_t nref; |
222 | struct list_head ci_item; |
223 | |
224 | struct ceph_cap_flush cap_flush; |
225 | |
226 | u64 follows; |
227 | int issued, dirty; |
228 | struct ceph_snap_context *context; |
229 | |
230 | umode_t mode; |
231 | kuid_t uid; |
232 | kgid_t gid; |
233 | |
234 | struct ceph_buffer *xattr_blob; |
235 | u64 xattr_version; |
236 | |
237 | u64 size; |
238 | u64 change_attr; |
239 | struct timespec64 mtime, atime, ctime, btime; |
240 | u64 time_warp_seq; |
241 | u64 truncate_size; |
242 | u32 truncate_seq; |
243 | int writing; /* a sync write is still in progress */ |
244 | int dirty_pages; /* dirty pages awaiting writeback */ |
245 | bool inline_data; |
246 | bool need_flush; |
247 | }; |
248 | |
249 | static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) |
250 | { |
251 | if (refcount_dec_and_test(r: &capsnap->nref)) { |
252 | if (capsnap->xattr_blob) |
253 | ceph_buffer_put(b: capsnap->xattr_blob); |
254 | kmem_cache_free(s: ceph_cap_snap_cachep, objp: capsnap); |
255 | } |
256 | } |
257 | |
258 | /* |
259 | * The frag tree describes how a directory is fragmented, potentially across |
260 | * multiple metadata servers. It is also used to indicate points where |
261 | * metadata authority is delegated, and whether/where metadata is replicated. |
262 | * |
263 | * A _leaf_ frag will be present in the i_fragtree IFF there is |
264 | * delegation info. That is, if mds >= 0 || ndist > 0. |
265 | */ |
266 | #define CEPH_MAX_DIRFRAG_REP 4 |
267 | |
268 | struct ceph_inode_frag { |
269 | struct rb_node node; |
270 | |
271 | /* fragtree state */ |
272 | u32 frag; |
273 | int split_by; /* i.e. 2^(split_by) children */ |
274 | |
275 | /* delegation and replication info */ |
276 | int mds; /* -1 if same authority as parent */ |
277 | int ndist; /* >0 if replicated */ |
278 | int dist[CEPH_MAX_DIRFRAG_REP]; |
279 | }; |
280 | |
281 | /* |
282 | * We cache inode xattrs as an encoded blob until they are first used, |
283 | * at which point we parse them into an rbtree. |
284 | */ |
285 | struct ceph_inode_xattr { |
286 | struct rb_node node; |
287 | |
288 | const char *name; |
289 | int name_len; |
290 | const char *val; |
291 | int val_len; |
292 | int dirty; |
293 | |
294 | int should_free_name; |
295 | int should_free_val; |
296 | }; |
297 | |
298 | /* |
299 | * Ceph dentry state |
300 | */ |
301 | struct ceph_dentry_info { |
302 | struct dentry *dentry; |
303 | struct ceph_mds_session *lease_session; |
304 | struct list_head lease_list; |
305 | struct hlist_node hnode; |
306 | unsigned long flags; |
307 | int lease_shared_gen; |
308 | u32 lease_gen; |
309 | u32 lease_seq; |
310 | unsigned long lease_renew_after, lease_renew_from; |
311 | unsigned long time; |
312 | u64 offset; |
313 | }; |
314 | |
315 | #define CEPH_DENTRY_REFERENCED (1 << 0) |
316 | #define CEPH_DENTRY_LEASE_LIST (1 << 1) |
317 | #define CEPH_DENTRY_SHRINK_LIST (1 << 2) |
318 | #define CEPH_DENTRY_PRIMARY_LINK (1 << 3) |
319 | #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4) |
320 | #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT) |
321 | #define CEPH_DENTRY_ASYNC_CREATE_BIT (5) |
322 | #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT) |
323 | |
324 | struct ceph_inode_xattrs_info { |
325 | /* |
326 | * (still encoded) xattr blob. we avoid the overhead of parsing |
327 | * this until someone actually calls getxattr, etc. |
328 | * |
329 | * blob->vec.iov_len == 4 implies there are no xattrs; blob == |
330 | * NULL means we don't know. |
331 | */ |
332 | struct ceph_buffer *blob, *prealloc_blob; |
333 | |
334 | struct rb_root index; |
335 | bool dirty; |
336 | int count; |
337 | int names_size; |
338 | int vals_size; |
339 | u64 version, index_version; |
340 | }; |
341 | |
342 | /* |
343 | * Ceph inode. |
344 | */ |
345 | struct ceph_inode_info { |
346 | struct netfs_inode netfs; /* Netfslib context and vfs inode */ |
347 | struct ceph_vino i_vino; /* ceph ino + snap */ |
348 | |
349 | spinlock_t i_ceph_lock; |
350 | |
351 | u64 i_version; |
352 | u64 i_inline_version; |
353 | u32 i_time_warp_seq; |
354 | |
355 | unsigned long i_ceph_flags; |
356 | atomic64_t i_release_count; |
357 | atomic64_t i_ordered_count; |
358 | atomic64_t i_complete_seq[2]; |
359 | |
360 | struct ceph_dir_layout i_dir_layout; |
361 | struct ceph_file_layout i_layout; |
362 | struct ceph_file_layout i_cached_layout; // for async creates |
363 | char *i_symlink; |
364 | |
365 | /* for dirs */ |
366 | struct timespec64 i_rctime; |
367 | u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps; |
368 | u64 i_files, i_subdirs; |
369 | |
370 | /* quotas */ |
371 | u64 i_max_bytes, i_max_files; |
372 | |
373 | s32 i_dir_pin; |
374 | |
375 | struct rb_root i_fragtree; |
376 | int i_fragtree_nsplits; |
377 | struct mutex i_fragtree_mutex; |
378 | |
379 | struct ceph_inode_xattrs_info i_xattrs; |
380 | |
381 | /* capabilities. protected _both_ by i_ceph_lock and cap->session's |
382 | * s_mutex. */ |
383 | struct rb_root i_caps; /* cap list */ |
384 | struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ |
385 | unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ |
386 | |
387 | /* |
388 | * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty |
389 | * is protected by the mdsc->cap_dirty_lock, but each individual item |
390 | * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty |
391 | * requires the mdsc->cap_dirty_lock. List presence for an item can |
392 | * be tested under the i_ceph_lock. Changing anything requires both. |
393 | */ |
394 | struct list_head i_dirty_item; |
395 | |
396 | /* |
397 | * Link to session's s_cap_flushing list. Protected in a similar |
398 | * fashion to i_dirty_item, but also by the s_mutex for changes. The |
399 | * s_cap_flushing list can be walked while holding either the s_mutex |
400 | * or msdc->cap_dirty_lock. List presence can also be checked while |
401 | * holding the i_ceph_lock for this inode. |
402 | */ |
403 | struct list_head i_flushing_item; |
404 | |
405 | /* we need to track cap writeback on a per-cap-bit basis, to allow |
406 | * overlapping, pipelined cap flushes to the mds. we can probably |
407 | * reduce the tid to 8 bits if we're concerned about inode size. */ |
408 | struct ceph_cap_flush *i_prealloc_cap_flush; |
409 | struct list_head i_cap_flush_list; |
410 | wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ |
411 | unsigned long i_hold_caps_max; /* jiffies */ |
412 | struct list_head i_cap_delay_list; /* for delayed cap release to mds */ |
413 | struct ceph_cap_reservation i_cap_migration_resv; |
414 | struct list_head i_cap_snaps; /* snapped state pending flush to mds */ |
415 | struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or |
416 | dirty|flushing caps */ |
417 | unsigned i_snap_caps; /* cap bits for snapped files */ |
418 | |
419 | unsigned long i_last_rd; |
420 | unsigned long i_last_wr; |
421 | int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */ |
422 | |
423 | struct mutex i_truncate_mutex; |
424 | u32 i_truncate_seq; /* last truncate to smaller size */ |
425 | u64 i_truncate_size; /* and the size we last truncated down to */ |
426 | int i_truncate_pending; /* still need to call vmtruncate */ |
427 | /* |
428 | * For none fscrypt case it equals to i_truncate_size or it will |
429 | * equals to fscrypt_file_size |
430 | */ |
431 | u64 i_truncate_pagecache_size; |
432 | |
433 | u64 i_max_size; /* max file size authorized by mds */ |
434 | u64 i_reported_size; /* (max_)size reported to or requested of mds */ |
435 | u64 i_wanted_max_size; /* offset we'd like to write too */ |
436 | u64 i_requested_max_size; /* max_size we've requested */ |
437 | |
438 | /* held references to caps */ |
439 | int i_pin_ref; |
440 | int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref; |
441 | int i_wrbuffer_ref, i_wrbuffer_ref_head; |
442 | atomic_t i_filelock_ref; |
443 | atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */ |
444 | u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ |
445 | u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ |
446 | |
447 | struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ |
448 | struct list_head i_unsafe_iops; /* uncommitted mds inode ops */ |
449 | spinlock_t i_unsafe_lock; |
450 | |
451 | union { |
452 | struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ |
453 | struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */ |
454 | }; |
455 | struct list_head i_snap_realm_item; |
456 | struct list_head i_snap_flush_item; |
457 | struct timespec64 i_btime; |
458 | struct timespec64 i_snap_btime; |
459 | |
460 | struct work_struct i_work; |
461 | unsigned long i_work_mask; |
462 | |
463 | #ifdef CONFIG_FS_ENCRYPTION |
464 | u32 fscrypt_auth_len; |
465 | u32 fscrypt_file_len; |
466 | u8 *fscrypt_auth; |
467 | u8 *fscrypt_file; |
468 | #endif |
469 | }; |
470 | |
471 | struct ceph_netfs_request_data { |
472 | int caps; |
473 | |
474 | /* |
475 | * Maximum size of a file readahead request. |
476 | * The fadvise could update the bdi's default ra_pages. |
477 | */ |
478 | unsigned int file_ra_pages; |
479 | |
480 | /* Set it if fadvise disables file readahead entirely */ |
481 | bool file_ra_disabled; |
482 | }; |
483 | |
484 | static inline struct ceph_inode_info * |
485 | ceph_inode(const struct inode *inode) |
486 | { |
487 | return container_of(inode, struct ceph_inode_info, netfs.inode); |
488 | } |
489 | |
490 | static inline struct ceph_fs_client * |
491 | ceph_inode_to_client(const struct inode *inode) |
492 | { |
493 | return (struct ceph_fs_client *)inode->i_sb->s_fs_info; |
494 | } |
495 | |
496 | static inline struct ceph_fs_client * |
497 | ceph_sb_to_client(const struct super_block *sb) |
498 | { |
499 | return (struct ceph_fs_client *)sb->s_fs_info; |
500 | } |
501 | |
502 | static inline struct ceph_mds_client * |
503 | ceph_sb_to_mdsc(const struct super_block *sb) |
504 | { |
505 | return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc; |
506 | } |
507 | |
508 | static inline struct ceph_vino |
509 | ceph_vino(const struct inode *inode) |
510 | { |
511 | return ceph_inode(inode)->i_vino; |
512 | } |
513 | |
514 | static inline u32 ceph_ino_to_ino32(u64 vino) |
515 | { |
516 | u32 ino = vino & 0xffffffff; |
517 | ino ^= vino >> 32; |
518 | if (!ino) |
519 | ino = 2; |
520 | return ino; |
521 | } |
522 | |
523 | /* |
524 | * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on |
525 | * some arches. We generally do not use this value inside the ceph driver, but |
526 | * we do want to set it to something, so that generic vfs code has an |
527 | * appropriate value for tracepoints and the like. |
528 | */ |
529 | static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino) |
530 | { |
531 | if (sizeof(ino_t) == sizeof(u32)) |
532 | return ceph_ino_to_ino32(vino: vino.ino); |
533 | return (ino_t)vino.ino; |
534 | } |
535 | |
536 | /* for printf-style formatting */ |
537 | #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap |
538 | |
539 | static inline u64 ceph_ino(struct inode *inode) |
540 | { |
541 | return ceph_inode(inode)->i_vino.ino; |
542 | } |
543 | |
544 | static inline u64 ceph_snap(struct inode *inode) |
545 | { |
546 | return ceph_inode(inode)->i_vino.snap; |
547 | } |
548 | |
549 | /** |
550 | * ceph_present_ino - format an inode number for presentation to userland |
551 | * @sb: superblock where the inode lives |
552 | * @ino: inode number to (possibly) convert |
553 | * |
554 | * If the user mounted with the ino32 option, then the 64-bit value needs |
555 | * to be converted to something that can fit inside 32 bits. Note that |
556 | * internal kernel code never uses this value, so this is entirely for |
557 | * userland consumption. |
558 | */ |
559 | static inline u64 ceph_present_ino(struct super_block *sb, u64 ino) |
560 | { |
561 | if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))) |
562 | return ceph_ino_to_ino32(vino: ino); |
563 | return ino; |
564 | } |
565 | |
566 | static inline u64 ceph_present_inode(struct inode *inode) |
567 | { |
568 | return ceph_present_ino(sb: inode->i_sb, ino: ceph_ino(inode)); |
569 | } |
570 | |
571 | static inline int ceph_ino_compare(struct inode *inode, void *data) |
572 | { |
573 | struct ceph_vino *pvino = (struct ceph_vino *)data; |
574 | struct ceph_inode_info *ci = ceph_inode(inode); |
575 | return ci->i_vino.ino == pvino->ino && |
576 | ci->i_vino.snap == pvino->snap; |
577 | } |
578 | |
579 | /* |
580 | * The MDS reserves a set of inodes for its own usage. These should never |
581 | * be accessible by clients, and so the MDS has no reason to ever hand these |
582 | * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE. |
583 | * |
584 | * These come from src/mds/mdstypes.h in the ceph sources. |
585 | */ |
586 | #define CEPH_MAX_MDS 0x100 |
587 | #define CEPH_NUM_STRAY 10 |
588 | #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS) |
589 | #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS) |
590 | #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY)) |
591 | |
592 | static inline bool ceph_vino_is_reserved(const struct ceph_vino vino) |
593 | { |
594 | if (vino.ino >= CEPH_INO_SYSTEM_BASE || |
595 | vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET) |
596 | return false; |
597 | |
598 | /* Don't warn on mdsdirs */ |
599 | WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET, |
600 | "Attempt to access reserved inode number 0x%llx" , |
601 | vino.ino); |
602 | return true; |
603 | } |
604 | |
605 | static inline struct inode *ceph_find_inode(struct super_block *sb, |
606 | struct ceph_vino vino) |
607 | { |
608 | if (ceph_vino_is_reserved(vino)) |
609 | return NULL; |
610 | |
611 | /* |
612 | * NB: The hashval will be run through the fs/inode.c hash function |
613 | * anyway, so there is no need to squash the inode number down to |
614 | * 32-bits first. Just use low-order bits on arches with 32-bit long. |
615 | */ |
616 | return ilookup5(sb, hashval: (unsigned long)vino.ino, test: ceph_ino_compare, data: &vino); |
617 | } |
618 | |
619 | |
620 | /* |
621 | * Ceph inode. |
622 | */ |
623 | #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */ |
624 | #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */ |
625 | #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */ |
626 | #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */ |
627 | #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */ |
628 | #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */ |
629 | #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */ |
630 | #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */ |
631 | #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */ |
632 | #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */ |
633 | #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */ |
634 | #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */ |
635 | #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT) |
636 | #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */ |
637 | #define CEPH_I_ASYNC_CHECK_CAPS (1 << 14) /* check caps immediately after async |
638 | creating finishes */ |
639 | |
640 | /* |
641 | * Masks of ceph inode work. |
642 | */ |
643 | #define CEPH_I_WORK_WRITEBACK 0 |
644 | #define CEPH_I_WORK_INVALIDATE_PAGES 1 |
645 | #define CEPH_I_WORK_VMTRUNCATE 2 |
646 | #define CEPH_I_WORK_CHECK_CAPS 3 |
647 | #define CEPH_I_WORK_FLUSH_SNAPS 4 |
648 | |
649 | /* |
650 | * We set the ERROR_WRITE bit when we start seeing write errors on an inode |
651 | * and then clear it when they start succeeding. Note that we do a lockless |
652 | * check first, and only take the lock if it looks like it needs to be changed. |
653 | * The write submission code just takes this as a hint, so we're not too |
654 | * worried if a few slip through in either direction. |
655 | */ |
656 | static inline void ceph_set_error_write(struct ceph_inode_info *ci) |
657 | { |
658 | if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) { |
659 | spin_lock(lock: &ci->i_ceph_lock); |
660 | ci->i_ceph_flags |= CEPH_I_ERROR_WRITE; |
661 | spin_unlock(lock: &ci->i_ceph_lock); |
662 | } |
663 | } |
664 | |
665 | static inline void ceph_clear_error_write(struct ceph_inode_info *ci) |
666 | { |
667 | if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) { |
668 | spin_lock(lock: &ci->i_ceph_lock); |
669 | ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE; |
670 | spin_unlock(lock: &ci->i_ceph_lock); |
671 | } |
672 | } |
673 | |
674 | static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci, |
675 | long long release_count, |
676 | long long ordered_count) |
677 | { |
678 | /* |
679 | * Makes sure operations that setup readdir cache (update page |
680 | * cache and i_size) are strongly ordered w.r.t. the following |
681 | * atomic64_set() operations. |
682 | */ |
683 | smp_mb(); |
684 | atomic64_set(v: &ci->i_complete_seq[0], i: release_count); |
685 | atomic64_set(v: &ci->i_complete_seq[1], i: ordered_count); |
686 | } |
687 | |
688 | static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci) |
689 | { |
690 | atomic64_inc(v: &ci->i_release_count); |
691 | } |
692 | |
693 | static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci) |
694 | { |
695 | atomic64_inc(v: &ci->i_ordered_count); |
696 | } |
697 | |
698 | static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci) |
699 | { |
700 | return atomic64_read(v: &ci->i_complete_seq[0]) == |
701 | atomic64_read(v: &ci->i_release_count); |
702 | } |
703 | |
704 | static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci) |
705 | { |
706 | return atomic64_read(v: &ci->i_complete_seq[0]) == |
707 | atomic64_read(v: &ci->i_release_count) && |
708 | atomic64_read(v: &ci->i_complete_seq[1]) == |
709 | atomic64_read(v: &ci->i_ordered_count); |
710 | } |
711 | |
712 | static inline void ceph_dir_clear_complete(struct inode *inode) |
713 | { |
714 | __ceph_dir_clear_complete(ci: ceph_inode(inode)); |
715 | } |
716 | |
717 | static inline void ceph_dir_clear_ordered(struct inode *inode) |
718 | { |
719 | __ceph_dir_clear_ordered(ci: ceph_inode(inode)); |
720 | } |
721 | |
722 | static inline bool ceph_dir_is_complete_ordered(struct inode *inode) |
723 | { |
724 | bool ret = __ceph_dir_is_complete_ordered(ci: ceph_inode(inode)); |
725 | smp_rmb(); |
726 | return ret; |
727 | } |
728 | |
729 | /* find a specific frag @f */ |
730 | extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, |
731 | u32 f); |
732 | |
733 | /* |
734 | * choose fragment for value @v. copy frag content to pfrag, if leaf |
735 | * exists |
736 | */ |
737 | extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
738 | struct ceph_inode_frag *pfrag, |
739 | int *found); |
740 | |
741 | static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry) |
742 | { |
743 | return (struct ceph_dentry_info *)dentry->d_fsdata; |
744 | } |
745 | |
746 | /* |
747 | * caps helpers |
748 | */ |
749 | static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) |
750 | { |
751 | return !RB_EMPTY_ROOT(&ci->i_caps); |
752 | } |
753 | |
754 | extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); |
755 | extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); |
756 | extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask, |
757 | int t); |
758 | extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, |
759 | struct ceph_cap *cap); |
760 | |
761 | static inline int ceph_caps_issued(struct ceph_inode_info *ci) |
762 | { |
763 | int issued; |
764 | spin_lock(lock: &ci->i_ceph_lock); |
765 | issued = __ceph_caps_issued(ci, NULL); |
766 | spin_unlock(lock: &ci->i_ceph_lock); |
767 | return issued; |
768 | } |
769 | |
770 | static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, |
771 | int mask, int touch) |
772 | { |
773 | int r; |
774 | spin_lock(lock: &ci->i_ceph_lock); |
775 | r = __ceph_caps_issued_mask_metric(ci, mask, t: touch); |
776 | spin_unlock(lock: &ci->i_ceph_lock); |
777 | return r; |
778 | } |
779 | |
780 | static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) |
781 | { |
782 | return ci->i_dirty_caps | ci->i_flushing_caps; |
783 | } |
784 | extern struct ceph_cap_flush *ceph_alloc_cap_flush(void); |
785 | extern void ceph_free_cap_flush(struct ceph_cap_flush *cf); |
786 | extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, |
787 | struct ceph_cap_flush **pcf); |
788 | |
789 | extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci, |
790 | struct ceph_cap *ocap, int mask); |
791 | extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); |
792 | extern int __ceph_caps_used(struct ceph_inode_info *ci); |
793 | |
794 | static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci) |
795 | { |
796 | return ci->i_nr_by_mode[0]; |
797 | } |
798 | extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); |
799 | extern int __ceph_caps_wanted(struct ceph_inode_info *ci); |
800 | |
801 | /* what the mds thinks we want */ |
802 | extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check); |
803 | |
804 | extern void ceph_caps_init(struct ceph_mds_client *mdsc); |
805 | extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); |
806 | extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc, |
807 | struct ceph_mount_options *fsopt); |
808 | extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, |
809 | struct ceph_cap_reservation *ctx, int need); |
810 | extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc, |
811 | struct ceph_cap_reservation *ctx); |
812 | extern void ceph_reservation_status(struct ceph_fs_client *client, |
813 | int *total, int *avail, int *used, |
814 | int *reserved, int *min); |
815 | extern void change_auth_cap_ses(struct ceph_inode_info *ci, |
816 | struct ceph_mds_session *session); |
817 | |
818 | |
819 | |
820 | /* |
821 | * we keep buffered readdir results attached to file->private_data |
822 | */ |
823 | #define CEPH_F_SYNC 1 |
824 | #define CEPH_F_ATEND 2 |
825 | |
826 | struct ceph_file_info { |
827 | short fmode; /* initialized on open */ |
828 | short flags; /* CEPH_F_* */ |
829 | |
830 | spinlock_t rw_contexts_lock; |
831 | struct list_head rw_contexts; |
832 | |
833 | u32 filp_gen; |
834 | }; |
835 | |
836 | struct ceph_dir_file_info { |
837 | struct ceph_file_info file_info; |
838 | |
839 | /* readdir: position within the dir */ |
840 | u32 frag; |
841 | struct ceph_mds_request *last_readdir; |
842 | |
843 | /* readdir: position within a frag */ |
844 | unsigned next_offset; /* offset of next chunk (last_name's + 1) */ |
845 | char *last_name; /* last entry in previous chunk */ |
846 | long long dir_release_count; |
847 | long long dir_ordered_count; |
848 | int readdir_cache_idx; |
849 | |
850 | /* used for -o dirstat read() on directory thing */ |
851 | char *dir_info; |
852 | int dir_info_len; |
853 | }; |
854 | |
855 | struct ceph_rw_context { |
856 | struct list_head list; |
857 | struct task_struct *thread; |
858 | int caps; |
859 | }; |
860 | |
861 | #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \ |
862 | struct ceph_rw_context _name = { \ |
863 | .thread = current, \ |
864 | .caps = _caps, \ |
865 | } |
866 | |
867 | static inline void ceph_add_rw_context(struct ceph_file_info *cf, |
868 | struct ceph_rw_context *ctx) |
869 | { |
870 | spin_lock(lock: &cf->rw_contexts_lock); |
871 | list_add(new: &ctx->list, head: &cf->rw_contexts); |
872 | spin_unlock(lock: &cf->rw_contexts_lock); |
873 | } |
874 | |
875 | static inline void ceph_del_rw_context(struct ceph_file_info *cf, |
876 | struct ceph_rw_context *ctx) |
877 | { |
878 | spin_lock(lock: &cf->rw_contexts_lock); |
879 | list_del(entry: &ctx->list); |
880 | spin_unlock(lock: &cf->rw_contexts_lock); |
881 | } |
882 | |
883 | static inline struct ceph_rw_context* |
884 | ceph_find_rw_context(struct ceph_file_info *cf) |
885 | { |
886 | struct ceph_rw_context *ctx, *found = NULL; |
887 | spin_lock(lock: &cf->rw_contexts_lock); |
888 | list_for_each_entry(ctx, &cf->rw_contexts, list) { |
889 | if (ctx->thread == current) { |
890 | found = ctx; |
891 | break; |
892 | } |
893 | } |
894 | spin_unlock(lock: &cf->rw_contexts_lock); |
895 | return found; |
896 | } |
897 | |
898 | struct ceph_readdir_cache_control { |
899 | struct page *page; |
900 | struct dentry **dentries; |
901 | int index; |
902 | }; |
903 | |
904 | /* |
905 | * A "snap realm" describes a subset of the file hierarchy sharing |
906 | * the same set of snapshots that apply to it. The realms themselves |
907 | * are organized into a hierarchy, such that children inherit (some of) |
908 | * the snapshots of their parents. |
909 | * |
910 | * All inodes within the realm that have capabilities are linked into a |
911 | * per-realm list. |
912 | */ |
913 | struct ceph_snap_realm { |
914 | u64 ino; |
915 | struct inode *inode; |
916 | atomic_t nref; |
917 | struct rb_node node; |
918 | |
919 | u64 created, seq; |
920 | u64 parent_ino; |
921 | u64 parent_since; /* snapid when our current parent became so */ |
922 | |
923 | u64 *prior_parent_snaps; /* snaps inherited from any parents we */ |
924 | u32 num_prior_parent_snaps; /* had prior to parent_since */ |
925 | u64 *snaps; /* snaps specific to this realm */ |
926 | u32 num_snaps; |
927 | |
928 | struct ceph_snap_realm *parent; |
929 | struct list_head children; /* list of child realms */ |
930 | struct list_head child_item; |
931 | |
932 | struct list_head empty_item; /* if i have ref==0 */ |
933 | |
934 | struct list_head dirty_item; /* if realm needs new context */ |
935 | |
936 | struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */ |
937 | |
938 | /* the current set of snaps for this realm */ |
939 | struct ceph_snap_context *cached_context; |
940 | |
941 | struct list_head inodes_with_caps; |
942 | spinlock_t inodes_with_caps_lock; |
943 | }; |
944 | |
945 | static inline int default_congestion_kb(void) |
946 | { |
947 | int congestion_kb; |
948 | |
949 | /* |
950 | * Copied from NFS |
951 | * |
952 | * congestion size, scale with available memory. |
953 | * |
954 | * 64MB: 8192k |
955 | * 128MB: 11585k |
956 | * 256MB: 16384k |
957 | * 512MB: 23170k |
958 | * 1GB: 32768k |
959 | * 2GB: 46340k |
960 | * 4GB: 65536k |
961 | * 8GB: 92681k |
962 | * 16GB: 131072k |
963 | * |
964 | * This allows larger machines to have larger/more transfers. |
965 | * Limit the default to 256M |
966 | */ |
967 | congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10); |
968 | if (congestion_kb > 256*1024) |
969 | congestion_kb = 256*1024; |
970 | |
971 | return congestion_kb; |
972 | } |
973 | |
974 | |
975 | /* super.c */ |
976 | extern int ceph_force_reconnect(struct super_block *sb); |
977 | /* snap.c */ |
978 | struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, |
979 | u64 ino); |
980 | extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, |
981 | struct ceph_snap_realm *realm); |
982 | extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, |
983 | struct ceph_snap_realm *realm); |
984 | extern int ceph_update_snap_trace(struct ceph_mds_client *m, |
985 | void *p, void *e, bool deletion, |
986 | struct ceph_snap_realm **realm_ret); |
987 | void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm); |
988 | extern void ceph_handle_snap(struct ceph_mds_client *mdsc, |
989 | struct ceph_mds_session *session, |
990 | struct ceph_msg *msg); |
991 | extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, |
992 | struct ceph_cap_snap *capsnap); |
993 | extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc); |
994 | |
995 | extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc, |
996 | u64 snap); |
997 | extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc, |
998 | struct ceph_snapid_map *sm); |
999 | extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc); |
1000 | extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc); |
1001 | void ceph_umount_begin(struct super_block *sb); |
1002 | |
1003 | |
1004 | /* |
1005 | * a cap_snap is "pending" if it is still awaiting an in-progress |
1006 | * sync write (that may/may not still update size, mtime, etc.). |
1007 | */ |
1008 | static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) |
1009 | { |
1010 | return !list_empty(head: &ci->i_cap_snaps) && |
1011 | list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, |
1012 | ci_item)->writing; |
1013 | } |
1014 | |
1015 | /* inode.c */ |
1016 | struct ceph_mds_reply_info_in; |
1017 | struct ceph_mds_reply_dirfrag; |
1018 | struct ceph_acl_sec_ctx; |
1019 | |
1020 | extern const struct inode_operations ceph_file_iops; |
1021 | |
1022 | extern struct inode *ceph_alloc_inode(struct super_block *sb); |
1023 | extern void ceph_evict_inode(struct inode *inode); |
1024 | extern void ceph_free_inode(struct inode *inode); |
1025 | |
1026 | struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry, |
1027 | umode_t *mode, struct ceph_acl_sec_ctx *as_ctx); |
1028 | void ceph_as_ctx_to_req(struct ceph_mds_request *req, |
1029 | struct ceph_acl_sec_ctx *as_ctx); |
1030 | |
1031 | extern struct inode *ceph_get_inode(struct super_block *sb, |
1032 | struct ceph_vino vino, |
1033 | struct inode *newino); |
1034 | extern struct inode *ceph_get_snapdir(struct inode *parent); |
1035 | extern int ceph_fill_file_size(struct inode *inode, int issued, |
1036 | u32 truncate_seq, u64 truncate_size, u64 size); |
1037 | extern void ceph_fill_file_time(struct inode *inode, int issued, |
1038 | u64 time_warp_seq, struct timespec64 *ctime, |
1039 | struct timespec64 *mtime, |
1040 | struct timespec64 *atime); |
1041 | extern int ceph_fill_inode(struct inode *inode, struct page *locked_page, |
1042 | struct ceph_mds_reply_info_in *iinfo, |
1043 | struct ceph_mds_reply_dirfrag *dirinfo, |
1044 | struct ceph_mds_session *session, int cap_fmode, |
1045 | struct ceph_cap_reservation *caps_reservation); |
1046 | extern int ceph_fill_trace(struct super_block *sb, |
1047 | struct ceph_mds_request *req); |
1048 | extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
1049 | struct ceph_mds_session *session); |
1050 | |
1051 | extern int ceph_inode_holds_cap(struct inode *inode, int mask); |
1052 | |
1053 | extern bool ceph_inode_set_size(struct inode *inode, loff_t size); |
1054 | extern void __ceph_do_pending_vmtruncate(struct inode *inode); |
1055 | |
1056 | void ceph_queue_inode_work(struct inode *inode, int work_bit); |
1057 | |
1058 | static inline void ceph_queue_vmtruncate(struct inode *inode) |
1059 | { |
1060 | ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE); |
1061 | } |
1062 | |
1063 | static inline void ceph_queue_invalidate(struct inode *inode) |
1064 | { |
1065 | ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES); |
1066 | } |
1067 | |
1068 | static inline void ceph_queue_writeback(struct inode *inode) |
1069 | { |
1070 | ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK); |
1071 | } |
1072 | |
1073 | static inline void ceph_queue_check_caps(struct inode *inode) |
1074 | { |
1075 | ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS); |
1076 | } |
1077 | |
1078 | static inline void ceph_queue_flush_snaps(struct inode *inode) |
1079 | { |
1080 | ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); |
1081 | } |
1082 | |
1083 | extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask); |
1084 | extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, |
1085 | int mask, bool force); |
1086 | static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) |
1087 | { |
1088 | return __ceph_do_getattr(inode, NULL, mask, force); |
1089 | } |
1090 | extern int ceph_permission(struct mnt_idmap *idmap, |
1091 | struct inode *inode, int mask); |
1092 | |
1093 | struct ceph_iattr { |
1094 | struct ceph_fscrypt_auth *fscrypt_auth; |
1095 | }; |
1096 | |
1097 | extern int __ceph_setattr(struct inode *inode, struct iattr *attr, |
1098 | struct ceph_iattr *cia); |
1099 | extern int ceph_setattr(struct mnt_idmap *idmap, |
1100 | struct dentry *dentry, struct iattr *attr); |
1101 | extern int ceph_getattr(struct mnt_idmap *idmap, |
1102 | const struct path *path, struct kstat *stat, |
1103 | u32 request_mask, unsigned int flags); |
1104 | void ceph_inode_shutdown(struct inode *inode); |
1105 | |
1106 | static inline bool ceph_inode_is_shutdown(struct inode *inode) |
1107 | { |
1108 | unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags); |
1109 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
1110 | int state = READ_ONCE(fsc->mount_state); |
1111 | |
1112 | return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN; |
1113 | } |
1114 | |
1115 | /* xattr.c */ |
1116 | int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int); |
1117 | int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size); |
1118 | ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t); |
1119 | extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); |
1120 | extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci); |
1121 | extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); |
1122 | extern const struct xattr_handler * const ceph_xattr_handlers[]; |
1123 | |
1124 | struct ceph_acl_sec_ctx { |
1125 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
1126 | void *default_acl; |
1127 | void *acl; |
1128 | #endif |
1129 | #ifdef CONFIG_CEPH_FS_SECURITY_LABEL |
1130 | void *sec_ctx; |
1131 | u32 sec_ctxlen; |
1132 | #endif |
1133 | #ifdef CONFIG_FS_ENCRYPTION |
1134 | struct ceph_fscrypt_auth *fscrypt_auth; |
1135 | #endif |
1136 | struct ceph_pagelist *pagelist; |
1137 | }; |
1138 | |
1139 | #ifdef CONFIG_SECURITY |
1140 | extern bool ceph_security_xattr_deadlock(struct inode *in); |
1141 | extern bool ceph_security_xattr_wanted(struct inode *in); |
1142 | #else |
1143 | static inline bool ceph_security_xattr_deadlock(struct inode *in) |
1144 | { |
1145 | return false; |
1146 | } |
1147 | static inline bool ceph_security_xattr_wanted(struct inode *in) |
1148 | { |
1149 | return false; |
1150 | } |
1151 | #endif |
1152 | |
1153 | #ifdef CONFIG_CEPH_FS_SECURITY_LABEL |
1154 | extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, |
1155 | struct ceph_acl_sec_ctx *ctx); |
1156 | static inline void ceph_security_invalidate_secctx(struct inode *inode) |
1157 | { |
1158 | security_inode_invalidate_secctx(inode); |
1159 | } |
1160 | #else |
1161 | static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode, |
1162 | struct ceph_acl_sec_ctx *ctx) |
1163 | { |
1164 | return 0; |
1165 | } |
1166 | static inline void ceph_security_invalidate_secctx(struct inode *inode) |
1167 | { |
1168 | } |
1169 | #endif |
1170 | |
1171 | void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx); |
1172 | |
1173 | /* acl.c */ |
1174 | #ifdef CONFIG_CEPH_FS_POSIX_ACL |
1175 | |
1176 | struct posix_acl *ceph_get_acl(struct inode *, int, bool); |
1177 | int ceph_set_acl(struct mnt_idmap *idmap, |
1178 | struct dentry *dentry, struct posix_acl *acl, int type); |
1179 | int ceph_pre_init_acls(struct inode *dir, umode_t *mode, |
1180 | struct ceph_acl_sec_ctx *as_ctx); |
1181 | void ceph_init_inode_acls(struct inode *inode, |
1182 | struct ceph_acl_sec_ctx *as_ctx); |
1183 | |
1184 | static inline void ceph_forget_all_cached_acls(struct inode *inode) |
1185 | { |
1186 | forget_all_cached_acls(inode); |
1187 | } |
1188 | |
1189 | #else |
1190 | |
1191 | #define ceph_get_acl NULL |
1192 | #define ceph_set_acl NULL |
1193 | |
1194 | static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode, |
1195 | struct ceph_acl_sec_ctx *as_ctx) |
1196 | { |
1197 | return 0; |
1198 | } |
1199 | static inline void ceph_init_inode_acls(struct inode *inode, |
1200 | struct ceph_acl_sec_ctx *as_ctx) |
1201 | { |
1202 | } |
1203 | static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode) |
1204 | { |
1205 | return 0; |
1206 | } |
1207 | |
1208 | static inline void ceph_forget_all_cached_acls(struct inode *inode) |
1209 | { |
1210 | } |
1211 | |
1212 | #endif |
1213 | |
1214 | /* caps.c */ |
1215 | extern const char *ceph_cap_string(int c); |
1216 | extern void ceph_handle_caps(struct ceph_mds_session *session, |
1217 | struct ceph_msg *msg); |
1218 | extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, |
1219 | struct ceph_cap_reservation *ctx); |
1220 | extern void ceph_add_cap(struct inode *inode, |
1221 | struct ceph_mds_session *session, u64 cap_id, |
1222 | unsigned issued, unsigned wanted, |
1223 | unsigned cap, unsigned seq, u64 realmino, int flags, |
1224 | struct ceph_cap **new_cap); |
1225 | extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release); |
1226 | extern void ceph_remove_cap(struct ceph_cap *cap, bool queue_release); |
1227 | extern void __ceph_remove_caps(struct ceph_inode_info *ci); |
1228 | extern void ceph_put_cap(struct ceph_mds_client *mdsc, |
1229 | struct ceph_cap *cap); |
1230 | extern int ceph_is_any_caps(struct inode *inode); |
1231 | |
1232 | extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); |
1233 | extern int ceph_fsync(struct file *file, loff_t start, loff_t end, |
1234 | int datasync); |
1235 | extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc, |
1236 | struct ceph_mds_session *session); |
1237 | extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, |
1238 | struct ceph_mds_session *session); |
1239 | void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session, |
1240 | struct ceph_inode_info *ci); |
1241 | extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, |
1242 | int mds); |
1243 | extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, |
1244 | int mds); |
1245 | extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps, |
1246 | bool snap_rwsem_locked); |
1247 | extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); |
1248 | extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); |
1249 | extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had); |
1250 | extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci, |
1251 | int had); |
1252 | extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, |
1253 | struct ceph_snap_context *snapc); |
1254 | extern void __ceph_remove_capsnap(struct inode *inode, |
1255 | struct ceph_cap_snap *capsnap, |
1256 | bool *wake_ci, bool *wake_mdsc); |
1257 | extern void ceph_remove_capsnap(struct inode *inode, |
1258 | struct ceph_cap_snap *capsnap, |
1259 | bool *wake_ci, bool *wake_mdsc); |
1260 | extern void ceph_flush_snaps(struct ceph_inode_info *ci, |
1261 | struct ceph_mds_session **psession); |
1262 | extern bool __ceph_should_report_size(struct ceph_inode_info *ci); |
1263 | extern void ceph_check_caps(struct ceph_inode_info *ci, int flags); |
1264 | extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc); |
1265 | extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); |
1266 | extern int ceph_drop_caps_for_unlink(struct inode *inode); |
1267 | extern int ceph_encode_inode_release(void **p, struct inode *inode, |
1268 | int mds, int drop, int unless, int force); |
1269 | extern int ceph_encode_dentry_release(void **p, struct dentry *dn, |
1270 | struct inode *dir, |
1271 | int mds, int drop, int unless); |
1272 | |
1273 | extern int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, |
1274 | int need, int want, loff_t endoff, int *got); |
1275 | extern int ceph_get_caps(struct file *filp, int need, int want, |
1276 | loff_t endoff, int *got); |
1277 | extern int ceph_try_get_caps(struct inode *inode, |
1278 | int need, int want, bool nonblock, int *got); |
1279 | |
1280 | /* for counting open files by mode */ |
1281 | extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count); |
1282 | extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count); |
1283 | extern void __ceph_touch_fmode(struct ceph_inode_info *ci, |
1284 | struct ceph_mds_client *mdsc, int fmode); |
1285 | |
1286 | /* addr.c */ |
1287 | extern const struct address_space_operations ceph_aops; |
1288 | extern const struct netfs_request_ops ceph_netfs_ops; |
1289 | extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); |
1290 | extern int ceph_uninline_data(struct file *file); |
1291 | extern int ceph_pool_perm_check(struct inode *inode, int need); |
1292 | extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc); |
1293 | int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate); |
1294 | |
1295 | static inline bool ceph_has_inline_data(struct ceph_inode_info *ci) |
1296 | { |
1297 | if (ci->i_inline_version == CEPH_INLINE_NONE || |
1298 | ci->i_inline_version == 1) /* initial version, no data */ |
1299 | return false; |
1300 | return true; |
1301 | } |
1302 | |
1303 | /* file.c */ |
1304 | extern const struct file_operations ceph_file_fops; |
1305 | |
1306 | extern int ceph_renew_caps(struct inode *inode, int fmode); |
1307 | extern int ceph_open(struct inode *inode, struct file *file); |
1308 | extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
1309 | struct file *file, unsigned flags, umode_t mode); |
1310 | extern ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos, |
1311 | struct iov_iter *to, int *retry_op, |
1312 | u64 *last_objver); |
1313 | extern int ceph_release(struct inode *inode, struct file *filp); |
1314 | extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page, |
1315 | char *data, size_t len); |
1316 | |
1317 | /* dir.c */ |
1318 | extern const struct file_operations ceph_dir_fops; |
1319 | extern const struct file_operations ceph_snapdir_fops; |
1320 | extern const struct inode_operations ceph_dir_iops; |
1321 | extern const struct inode_operations ceph_snapdir_iops; |
1322 | extern const struct dentry_operations ceph_dentry_ops; |
1323 | |
1324 | extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order); |
1325 | extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); |
1326 | extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req, |
1327 | struct dentry *dentry); |
1328 | extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, |
1329 | struct dentry *dentry, int err); |
1330 | |
1331 | extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di); |
1332 | extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di); |
1333 | extern void ceph_invalidate_dentry_lease(struct dentry *dentry); |
1334 | extern int ceph_trim_dentries(struct ceph_mds_client *mdsc); |
1335 | extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn); |
1336 | extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl); |
1337 | |
1338 | /* ioctl.c */ |
1339 | extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
1340 | |
1341 | /* export.c */ |
1342 | extern const struct export_operations ceph_export_ops; |
1343 | struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino); |
1344 | |
1345 | /* locks.c */ |
1346 | extern __init void ceph_flock_init(void); |
1347 | extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); |
1348 | extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); |
1349 | extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); |
1350 | extern int ceph_encode_locks_to_buffer(struct inode *inode, |
1351 | struct ceph_filelock *flocks, |
1352 | int num_fcntl_locks, |
1353 | int num_flock_locks); |
1354 | extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, |
1355 | struct ceph_pagelist *pagelist, |
1356 | int num_fcntl_locks, int num_flock_locks); |
1357 | |
1358 | /* debugfs.c */ |
1359 | extern void ceph_fs_debugfs_init(struct ceph_fs_client *client); |
1360 | extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); |
1361 | |
1362 | /* quota.c */ |
1363 | |
1364 | enum quota_get_realm { |
1365 | QUOTA_GET_MAX_FILES, |
1366 | QUOTA_GET_MAX_BYTES, |
1367 | QUOTA_GET_ANY |
1368 | }; |
1369 | |
1370 | static inline bool __ceph_has_quota(struct ceph_inode_info *ci, |
1371 | enum quota_get_realm which) |
1372 | { |
1373 | bool has_quota = false; |
1374 | |
1375 | switch (which) { |
1376 | case QUOTA_GET_MAX_BYTES: |
1377 | has_quota = !!ci->i_max_bytes; |
1378 | break; |
1379 | case QUOTA_GET_MAX_FILES: |
1380 | has_quota = !!ci->i_max_files; |
1381 | break; |
1382 | default: |
1383 | has_quota = !!(ci->i_max_files || ci->i_max_bytes); |
1384 | } |
1385 | return has_quota; |
1386 | } |
1387 | |
1388 | extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); |
1389 | |
1390 | static inline void __ceph_update_quota(struct ceph_inode_info *ci, |
1391 | u64 max_bytes, u64 max_files) |
1392 | { |
1393 | bool had_quota, has_quota; |
1394 | had_quota = __ceph_has_quota(ci, which: QUOTA_GET_ANY); |
1395 | ci->i_max_bytes = max_bytes; |
1396 | ci->i_max_files = max_files; |
1397 | has_quota = __ceph_has_quota(ci, which: QUOTA_GET_ANY); |
1398 | |
1399 | if (had_quota != has_quota) |
1400 | ceph_adjust_quota_realms_count(inode: &ci->netfs.inode, inc: has_quota); |
1401 | } |
1402 | |
1403 | extern void ceph_handle_quota(struct ceph_mds_client *mdsc, |
1404 | struct ceph_mds_session *session, |
1405 | struct ceph_msg *msg); |
1406 | extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); |
1407 | extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); |
1408 | extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, |
1409 | loff_t newlen); |
1410 | extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, |
1411 | loff_t newlen); |
1412 | extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, |
1413 | struct kstatfs *buf); |
1414 | extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc); |
1415 | |
1416 | bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc, |
1417 | struct ceph_mds_session *session); |
1418 | void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc); |
1419 | bool ceph_inc_osd_stopping_blocker(struct ceph_mds_client *mdsc); |
1420 | void ceph_dec_osd_stopping_blocker(struct ceph_mds_client *mdsc); |
1421 | #endif /* _FS_CEPH_SUPER_H */ |
1422 | |