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1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
3 | * |
4 | * ocfs2.h |
5 | * |
6 | * Defines macros and structures used in OCFS2 |
7 | * |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
9 | * |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public |
12 | * License as published by the Free Software Foundation; either |
13 | * version 2 of the License, or (at your option) any later version. |
14 | * |
15 | * This program is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
18 | * General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public |
21 | * License along with this program; if not, write to the |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
23 | * Boston, MA 021110-1307, USA. |
24 | */ |
25 | |
26 | #ifndef OCFS2_H |
27 | #define OCFS2_H |
28 | |
29 | #include <linux/spinlock.h> |
30 | #include <linux/sched.h> |
31 | #include <linux/wait.h> |
32 | #include <linux/list.h> |
33 | #include <linux/rbtree.h> |
34 | #include <linux/workqueue.h> |
35 | #include <linux/kref.h> |
36 | #include <linux/mutex.h> |
37 | #include <linux/lockdep.h> |
38 | #include <linux/jbd2.h> |
39 | |
40 | /* For union ocfs2_dlm_lksb */ |
41 | #include "stackglue.h" |
42 | |
43 | #include "ocfs2_fs.h" |
44 | #include "ocfs2_lockid.h" |
45 | #include "ocfs2_ioctl.h" |
46 | |
47 | /* For struct ocfs2_blockcheck_stats */ |
48 | #include "blockcheck.h" |
49 | |
50 | #include "reservations.h" |
51 | |
52 | /* Caching of metadata buffers */ |
53 | |
54 | /* Most user visible OCFS2 inodes will have very few pieces of |
55 | * metadata, but larger files (including bitmaps, etc) must be taken |
56 | * into account when designing an access scheme. We allow a small |
57 | * amount of inlined blocks to be stored on an array and grow the |
58 | * structure into a rb tree when necessary. */ |
59 | #define OCFS2_CACHE_INFO_MAX_ARRAY 2 |
60 | |
61 | /* Flags for ocfs2_caching_info */ |
62 | |
63 | enum ocfs2_caching_info_flags { |
64 | /* Indicates that the metadata cache is using the inline array */ |
65 | OCFS2_CACHE_FL_INLINE = 1<<1, |
66 | }; |
67 | |
68 | struct ocfs2_caching_operations; |
69 | struct ocfs2_caching_info { |
70 | /* |
71 | * The parent structure provides the locks, but because the |
72 | * parent structure can differ, it provides locking operations |
73 | * to struct ocfs2_caching_info. |
74 | */ |
75 | const struct ocfs2_caching_operations *ci_ops; |
76 | |
77 | /* next two are protected by trans_inc_lock */ |
78 | /* which transaction were we created on? Zero if none. */ |
79 | unsigned long ci_created_trans; |
80 | /* last transaction we were a part of. */ |
81 | unsigned long ci_last_trans; |
82 | |
83 | /* Cache structures */ |
84 | unsigned int ci_flags; |
85 | unsigned int ci_num_cached; |
86 | union { |
87 | sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; |
88 | struct rb_root ci_tree; |
89 | } ci_cache; |
90 | }; |
91 | /* |
92 | * Need this prototype here instead of in uptodate.h because journal.h |
93 | * uses it. |
94 | */ |
95 | struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); |
96 | |
97 | /* this limits us to 256 nodes |
98 | * if we need more, we can do a kmalloc for the map */ |
99 | #define OCFS2_NODE_MAP_MAX_NODES 256 |
100 | struct ocfs2_node_map { |
101 | u16 num_nodes; |
102 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; |
103 | }; |
104 | |
105 | enum ocfs2_ast_action { |
106 | OCFS2_AST_INVALID = 0, |
107 | OCFS2_AST_ATTACH, |
108 | OCFS2_AST_CONVERT, |
109 | OCFS2_AST_DOWNCONVERT, |
110 | }; |
111 | |
112 | /* actions for an unlockast function to take. */ |
113 | enum ocfs2_unlock_action { |
114 | OCFS2_UNLOCK_INVALID = 0, |
115 | OCFS2_UNLOCK_CANCEL_CONVERT, |
116 | OCFS2_UNLOCK_DROP_LOCK, |
117 | }; |
118 | |
119 | /* ocfs2_lock_res->l_flags flags. */ |
120 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
121 | * the lvb */ |
122 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in |
123 | * dlm_lock */ |
124 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to |
125 | * downconvert*/ |
126 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ |
127 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) |
128 | #define OCFS2_LOCK_REFRESHING (0x00000020) |
129 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization |
130 | * for shutdown paths */ |
131 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track |
132 | * when to skip queueing |
133 | * a lock because it's |
134 | * about to be |
135 | * dropped. */ |
136 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ |
137 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
138 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
139 | call to dlm_lock. Only |
140 | exists with BUSY set. */ |
141 | #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread |
142 | * from downconverting |
143 | * before the upconvert |
144 | * has completed */ |
145 | |
146 | struct ocfs2_lock_res_ops; |
147 | |
148 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); |
149 | |
150 | #ifdef CONFIG_OCFS2_FS_STATS |
151 | struct ocfs2_lock_stats { |
152 | u64 ls_total; /* Total wait in NSEC */ |
153 | u32 ls_gets; /* Num acquires */ |
154 | u32 ls_fail; /* Num failed acquires */ |
155 | |
156 | /* Storing max wait in usecs saves 24 bytes per inode */ |
157 | u32 ls_max; /* Max wait in USEC */ |
158 | }; |
159 | #endif |
160 | |
161 | struct ocfs2_lock_res { |
162 | void *l_priv; |
163 | struct ocfs2_lock_res_ops *l_ops; |
164 | |
165 | |
166 | struct list_head l_blocked_list; |
167 | struct list_head l_mask_waiters; |
168 | |
169 | unsigned long l_flags; |
170 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; |
171 | unsigned int l_ro_holders; |
172 | unsigned int l_ex_holders; |
173 | signed char l_level; |
174 | signed char l_requested; |
175 | signed char l_blocking; |
176 | |
177 | /* Data packed - type enum ocfs2_lock_type */ |
178 | unsigned char l_type; |
179 | |
180 | /* used from AST/BAST funcs. */ |
181 | /* Data packed - enum type ocfs2_ast_action */ |
182 | unsigned char l_action; |
183 | /* Data packed - enum type ocfs2_unlock_action */ |
184 | unsigned char l_unlock_action; |
185 | unsigned int l_pending_gen; |
186 | |
187 | spinlock_t l_lock; |
188 | |
189 | struct ocfs2_dlm_lksb l_lksb; |
190 | |
191 | wait_queue_head_t l_event; |
192 | |
193 | struct list_head l_debug_list; |
194 | |
195 | #ifdef CONFIG_OCFS2_FS_STATS |
196 | struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ |
197 | u32 l_lock_refresh; /* Disk refreshes */ |
198 | struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ |
199 | #endif |
200 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
201 | struct lockdep_map l_lockdep_map; |
202 | #endif |
203 | }; |
204 | |
205 | enum ocfs2_orphan_scan_state { |
206 | ORPHAN_SCAN_ACTIVE, |
207 | ORPHAN_SCAN_INACTIVE |
208 | }; |
209 | |
210 | struct ocfs2_orphan_scan { |
211 | struct mutex os_lock; |
212 | struct ocfs2_super *os_osb; |
213 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ |
214 | struct delayed_work os_orphan_scan_work; |
215 | struct timespec os_scantime; /* time this node ran the scan */ |
216 | u32 os_count; /* tracks node specific scans */ |
217 | u32 os_seqno; /* tracks cluster wide scans */ |
218 | atomic_t os_state; /* ACTIVE or INACTIVE */ |
219 | }; |
220 | |
221 | struct ocfs2_dlm_debug { |
222 | struct kref d_refcnt; |
223 | struct dentry *d_locking_state; |
224 | struct list_head d_lockres_tracking; |
225 | }; |
226 | |
227 | enum ocfs2_vol_state |
228 | { |
229 | VOLUME_INIT = 0, |
230 | VOLUME_MOUNTED, |
231 | VOLUME_MOUNTED_QUOTAS, |
232 | VOLUME_DISMOUNTED, |
233 | VOLUME_DISABLED |
234 | }; |
235 | |
236 | struct ocfs2_alloc_stats |
237 | { |
238 | atomic_t moves; |
239 | atomic_t local_data; |
240 | atomic_t bitmap_data; |
241 | atomic_t bg_allocs; |
242 | atomic_t bg_extends; |
243 | }; |
244 | |
245 | enum ocfs2_local_alloc_state |
246 | { |
247 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
248 | * this mountpoint. */ |
249 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ |
250 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number |
251 | * of bits has been reduced. */ |
252 | OCFS2_LA_DISABLED /* Local alloc has temporarily been |
253 | * disabled. */ |
254 | }; |
255 | |
256 | enum ocfs2_mount_options |
257 | { |
258 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ |
259 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ |
260 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ |
261 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ |
262 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ |
263 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
264 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
265 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
266 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ |
267 | OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access |
268 | control lists */ |
269 | OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ |
270 | OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ |
271 | OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT |
272 | writes */ |
273 | OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ |
274 | OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ |
275 | }; |
276 | |
277 | #define OCFS2_OSB_SOFT_RO 0x0001 |
278 | #define OCFS2_OSB_HARD_RO 0x0002 |
279 | #define OCFS2_OSB_ERROR_FS 0x0004 |
280 | #define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008 |
281 | |
282 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
283 | |
284 | struct ocfs2_journal; |
285 | struct ocfs2_slot_info; |
286 | struct ocfs2_recovery_map; |
287 | struct ocfs2_replay_map; |
288 | struct ocfs2_quota_recovery; |
289 | struct ocfs2_dentry_lock; |
290 | struct ocfs2_super |
291 | { |
292 | struct task_struct *commit_task; |
293 | struct super_block *sb; |
294 | struct inode *root_inode; |
295 | struct inode *sys_root_inode; |
296 | struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; |
297 | struct inode **local_system_inodes; |
298 | |
299 | struct ocfs2_slot_info *slot_info; |
300 | |
301 | u32 *slot_recovery_generations; |
302 | |
303 | spinlock_t node_map_lock; |
304 | |
305 | u64 root_blkno; |
306 | u64 system_dir_blkno; |
307 | u64 bitmap_blkno; |
308 | u32 bitmap_cpg; |
309 | u8 *uuid; |
310 | char *uuid_str; |
311 | u32 uuid_hash; |
312 | u8 *vol_label; |
313 | u64 first_cluster_group_blkno; |
314 | u32 fs_generation; |
315 | |
316 | u32 s_feature_compat; |
317 | u32 s_feature_incompat; |
318 | u32 s_feature_ro_compat; |
319 | |
320 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
321 | * Could protect more on osb as it's very short lived. |
322 | */ |
323 | spinlock_t osb_lock; |
324 | u32 s_next_generation; |
325 | unsigned long osb_flags; |
326 | s16 s_inode_steal_slot; |
327 | s16 s_meta_steal_slot; |
328 | atomic_t s_num_inodes_stolen; |
329 | atomic_t s_num_meta_stolen; |
330 | |
331 | unsigned long s_mount_opt; |
332 | unsigned int s_atime_quantum; |
333 | |
334 | unsigned int max_slots; |
335 | unsigned int node_num; |
336 | int slot_num; |
337 | int preferred_slot; |
338 | int s_sectsize_bits; |
339 | int s_clustersize; |
340 | int s_clustersize_bits; |
341 | unsigned int s_xattr_inline_size; |
342 | |
343 | atomic_t vol_state; |
344 | struct mutex recovery_lock; |
345 | struct ocfs2_recovery_map *recovery_map; |
346 | struct ocfs2_replay_map *replay_map; |
347 | struct task_struct *recovery_thread_task; |
348 | int disable_recovery; |
349 | wait_queue_head_t checkpoint_event; |
350 | atomic_t needs_checkpoint; |
351 | struct ocfs2_journal *journal; |
352 | unsigned long osb_commit_interval; |
353 | |
354 | struct delayed_work la_enable_wq; |
355 | |
356 | /* |
357 | * Must hold local alloc i_mutex and osb->osb_lock to change |
358 | * local_alloc_bits. Reads can be done under either lock. |
359 | */ |
360 | unsigned int local_alloc_bits; |
361 | unsigned int local_alloc_default_bits; |
362 | /* osb_clusters_at_boot can become stale! Do not trust it to |
363 | * be up to date. */ |
364 | unsigned int osb_clusters_at_boot; |
365 | |
366 | enum ocfs2_local_alloc_state local_alloc_state; /* protected |
367 | * by osb_lock */ |
368 | |
369 | struct buffer_head *local_alloc_bh; |
370 | |
371 | u64 la_last_gd; |
372 | |
373 | struct ocfs2_reservation_map osb_la_resmap; |
374 | |
375 | unsigned int osb_resv_level; |
376 | unsigned int osb_dir_resv_level; |
377 | |
378 | /* Next three fields are for local node slot recovery during |
379 | * mount. */ |
380 | int dirty; |
381 | struct ocfs2_dinode *local_alloc_copy; |
382 | struct ocfs2_quota_recovery *quota_rec; |
383 | |
384 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
385 | struct ocfs2_alloc_stats alloc_stats; |
386 | char dev_str[20]; /* "major,minor" of the device */ |
387 | |
388 | u8 osb_stackflags; |
389 | |
390 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
391 | struct ocfs2_cluster_connection *cconn; |
392 | struct ocfs2_lock_res osb_super_lockres; |
393 | struct ocfs2_lock_res osb_rename_lockres; |
394 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
395 | struct ocfs2_dlm_debug *osb_dlm_debug; |
396 | |
397 | struct dentry *osb_debug_root; |
398 | struct dentry *osb_ctxt; |
399 | |
400 | wait_queue_head_t recovery_event; |
401 | |
402 | spinlock_t dc_task_lock; |
403 | struct task_struct *dc_task; |
404 | wait_queue_head_t dc_event; |
405 | unsigned long dc_wake_sequence; |
406 | unsigned long dc_work_sequence; |
407 | |
408 | /* |
409 | * Any thread can add locks to the list, but the downconvert |
410 | * thread is the only one allowed to remove locks. Any change |
411 | * to this rule requires updating |
412 | * ocfs2_downconvert_thread_do_work(). |
413 | */ |
414 | struct list_head blocked_lock_list; |
415 | unsigned long blocked_lock_count; |
416 | |
417 | /* List of dentry locks to release. Anyone can add locks to |
418 | * the list, ocfs2_wq processes the list */ |
419 | struct ocfs2_dentry_lock *dentry_lock_list; |
420 | struct work_struct dentry_lock_work; |
421 | |
422 | wait_queue_head_t osb_mount_event; |
423 | |
424 | /* Truncate log info */ |
425 | struct inode *osb_tl_inode; |
426 | struct buffer_head *osb_tl_bh; |
427 | struct delayed_work osb_truncate_log_wq; |
428 | /* |
429 | * How many clusters in our truncate log. |
430 | * It must be protected by osb_tl_inode->i_mutex. |
431 | */ |
432 | unsigned int truncated_clusters; |
433 | |
434 | struct ocfs2_node_map osb_recovering_orphan_dirs; |
435 | unsigned int *osb_orphan_wipes; |
436 | wait_queue_head_t osb_wipe_event; |
437 | |
438 | struct ocfs2_orphan_scan osb_orphan_scan; |
439 | |
440 | /* used to protect metaecc calculation check of xattr. */ |
441 | spinlock_t osb_xattr_lock; |
442 | |
443 | unsigned int osb_dx_mask; |
444 | u32 osb_dx_seed[4]; |
445 | |
446 | /* the group we used to allocate inodes. */ |
447 | u64 osb_inode_alloc_group; |
448 | |
449 | /* rb tree root for refcount lock. */ |
450 | struct rb_root osb_rf_lock_tree; |
451 | struct ocfs2_refcount_tree *osb_ref_tree_lru; |
452 | }; |
453 | |
454 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) |
455 | |
456 | /* Useful typedef for passing around journal access functions */ |
457 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, |
458 | struct ocfs2_caching_info *ci, |
459 | struct buffer_head *bh, int type); |
460 | |
461 | static inline int ocfs2_should_order_data(struct inode *inode) |
462 | { |
463 | if (!S_ISREG(inode->i_mode)) |
464 | return 0; |
465 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) |
466 | return 0; |
467 | return 1; |
468 | } |
469 | |
470 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
471 | { |
472 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) |
473 | return 1; |
474 | return 0; |
475 | } |
476 | |
477 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
478 | { |
479 | /* |
480 | * Support for sparse files is a pre-requisite |
481 | */ |
482 | if (!ocfs2_sparse_alloc(osb)) |
483 | return 0; |
484 | |
485 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) |
486 | return 1; |
487 | return 0; |
488 | } |
489 | |
490 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
491 | { |
492 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) |
493 | return 1; |
494 | return 0; |
495 | } |
496 | |
497 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
498 | { |
499 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) |
500 | return 1; |
501 | return 0; |
502 | } |
503 | |
504 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
505 | { |
506 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) |
507 | return 1; |
508 | return 0; |
509 | } |
510 | |
511 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
512 | { |
513 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) |
514 | return 1; |
515 | return 0; |
516 | } |
517 | |
518 | static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) |
519 | { |
520 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) |
521 | return 1; |
522 | return 0; |
523 | } |
524 | |
525 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
526 | { |
527 | if (ocfs2_supports_indexed_dirs(osb)) |
528 | return OCFS2_DX_LINK_MAX; |
529 | return OCFS2_LINK_MAX; |
530 | } |
531 | |
532 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) |
533 | { |
534 | u32 nlink = le16_to_cpu(di->i_links_count); |
535 | u32 hi = le16_to_cpu(di->i_links_count_hi); |
536 | |
537 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) |
538 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); |
539 | |
540 | return nlink; |
541 | } |
542 | |
543 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) |
544 | { |
545 | u16 lo, hi; |
546 | |
547 | lo = nlink; |
548 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; |
549 | |
550 | di->i_links_count = cpu_to_le16(lo); |
551 | di->i_links_count_hi = cpu_to_le16(hi); |
552 | } |
553 | |
554 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) |
555 | { |
556 | u32 links = ocfs2_read_links_count(di); |
557 | |
558 | links += n; |
559 | |
560 | ocfs2_set_links_count(di, links); |
561 | } |
562 | |
563 | static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) |
564 | { |
565 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) |
566 | return 1; |
567 | return 0; |
568 | } |
569 | |
570 | /* set / clear functions because cluster events can make these happen |
571 | * in parallel so we want the transitions to be atomic. this also |
572 | * means that any future flags osb_flags must be protected by spinlock |
573 | * too! */ |
574 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, |
575 | unsigned long flag) |
576 | { |
577 | spin_lock(&osb->osb_lock); |
578 | osb->osb_flags |= flag; |
579 | spin_unlock(&osb->osb_lock); |
580 | } |
581 | |
582 | |
583 | static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb, |
584 | unsigned long flag) |
585 | { |
586 | unsigned long ret; |
587 | |
588 | spin_lock(&osb->osb_lock); |
589 | ret = osb->osb_flags & flag; |
590 | spin_unlock(&osb->osb_lock); |
591 | return ret; |
592 | } |
593 | |
594 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, |
595 | int hard) |
596 | { |
597 | spin_lock(&osb->osb_lock); |
598 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); |
599 | if (hard) |
600 | osb->osb_flags |= OCFS2_OSB_HARD_RO; |
601 | else |
602 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; |
603 | spin_unlock(&osb->osb_lock); |
604 | } |
605 | |
606 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) |
607 | { |
608 | int ret; |
609 | |
610 | spin_lock(&osb->osb_lock); |
611 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; |
612 | spin_unlock(&osb->osb_lock); |
613 | |
614 | return ret; |
615 | } |
616 | |
617 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) |
618 | { |
619 | int ret; |
620 | |
621 | spin_lock(&osb->osb_lock); |
622 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; |
623 | spin_unlock(&osb->osb_lock); |
624 | |
625 | return ret; |
626 | } |
627 | |
628 | static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) |
629 | { |
630 | return (osb->s_feature_incompat & |
631 | (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | |
632 | OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); |
633 | } |
634 | |
635 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
636 | { |
637 | if (ocfs2_clusterinfo_valid(osb) && |
638 | memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, |
639 | OCFS2_STACK_LABEL_LEN)) |
640 | return 1; |
641 | return 0; |
642 | } |
643 | |
644 | static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) |
645 | { |
646 | if (ocfs2_clusterinfo_valid(osb) && |
647 | !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, |
648 | OCFS2_STACK_LABEL_LEN)) |
649 | return 1; |
650 | return 0; |
651 | } |
652 | |
653 | static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) |
654 | { |
655 | return ocfs2_o2cb_stack(osb) && |
656 | (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); |
657 | } |
658 | |
659 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
660 | { |
661 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); |
662 | } |
663 | |
664 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
665 | { |
666 | return (osb->s_feature_incompat & |
667 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); |
668 | } |
669 | |
670 | |
671 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
672 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) |
673 | |
674 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
675 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) |
676 | |
677 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
678 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) |
679 | |
680 | |
681 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
682 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) |
683 | |
684 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
685 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) |
686 | |
687 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
688 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) |
689 | |
690 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ |
691 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) |
692 | |
693 | #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ |
694 | (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) |
695 | |
696 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
697 | u64 blkno) |
698 | { |
699 | return (unsigned long)(blkno & (u64)ULONG_MAX); |
700 | } |
701 | |
702 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, |
703 | u32 clusters) |
704 | { |
705 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - |
706 | sb->s_blocksize_bits; |
707 | |
708 | return (u64)clusters << c_to_b_bits; |
709 | } |
710 | |
711 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, |
712 | u64 blocks) |
713 | { |
714 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - |
715 | sb->s_blocksize_bits; |
716 | |
717 | return (u32)(blocks >> b_to_c_bits); |
718 | } |
719 | |
720 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, |
721 | u64 bytes) |
722 | { |
723 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; |
724 | unsigned int clusters; |
725 | |
726 | bytes += OCFS2_SB(sb)->s_clustersize - 1; |
727 | /* OCFS2 just cannot have enough clusters to overflow this */ |
728 | clusters = (unsigned int)(bytes >> cl_bits); |
729 | |
730 | return clusters; |
731 | } |
732 | |
733 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, |
734 | u64 bytes) |
735 | { |
736 | bytes += sb->s_blocksize - 1; |
737 | return bytes >> sb->s_blocksize_bits; |
738 | } |
739 | |
740 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, |
741 | u32 clusters) |
742 | { |
743 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; |
744 | } |
745 | |
746 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
747 | u64 blocks) |
748 | { |
749 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; |
750 | unsigned int clusters; |
751 | |
752 | clusters = ocfs2_blocks_to_clusters(sb, blocks); |
753 | return (u64)clusters << bits; |
754 | } |
755 | |
756 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
757 | u64 bytes) |
758 | { |
759 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; |
760 | unsigned int clusters; |
761 | |
762 | clusters = ocfs2_clusters_for_bytes(sb, bytes); |
763 | return (u64)clusters << cl_bits; |
764 | } |
765 | |
766 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, |
767 | u64 bytes) |
768 | { |
769 | u64 blocks; |
770 | |
771 | blocks = ocfs2_blocks_for_bytes(sb, bytes); |
772 | return blocks << sb->s_blocksize_bits; |
773 | } |
774 | |
775 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) |
776 | { |
777 | return (unsigned long)((bytes + 511) >> 9); |
778 | } |
779 | |
780 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
781 | unsigned long pg_index) |
782 | { |
783 | u32 clusters = pg_index; |
784 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; |
785 | |
786 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) |
787 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); |
788 | else if (PAGE_CACHE_SHIFT < cbits) |
789 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); |
790 | |
791 | return clusters; |
792 | } |
793 | |
794 | /* |
795 | * Find the 1st page index which covers the given clusters. |
796 | */ |
797 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
798 | u32 clusters) |
799 | { |
800 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; |
801 | pgoff_t index = clusters; |
802 | |
803 | if (PAGE_CACHE_SHIFT > cbits) { |
804 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
805 | } else if (PAGE_CACHE_SHIFT < cbits) { |
806 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
807 | } |
808 | |
809 | return index; |
810 | } |
811 | |
812 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
813 | { |
814 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; |
815 | unsigned int pages_per_cluster = 1; |
816 | |
817 | if (PAGE_CACHE_SHIFT < cbits) |
818 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); |
819 | |
820 | return pages_per_cluster; |
821 | } |
822 | |
823 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
824 | unsigned int megs) |
825 | { |
826 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); |
827 | |
828 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); |
829 | } |
830 | |
831 | static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, |
832 | unsigned int clusters) |
833 | { |
834 | return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); |
835 | } |
836 | |
837 | static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) |
838 | { |
839 | __test_and_set_bit_le(bit, bitmap); |
840 | } |
841 | #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) |
842 | |
843 | static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) |
844 | { |
845 | __test_and_clear_bit_le(bit, bitmap); |
846 | } |
847 | #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) |
848 | |
849 | #define ocfs2_test_bit test_bit_le |
850 | #define ocfs2_find_next_zero_bit find_next_zero_bit_le |
851 | #define ocfs2_find_next_bit find_next_bit_le |
852 | #endif /* OCFS2_H */ |
853 | |
854 |
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