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ccd979bd MF |
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> | |
c74ec2f7 | 36 | #include <linux/mutex.h> |
1fabe148 | 37 | #include <linux/jbd.h> |
ccd979bd MF |
38 | |
39 | #include "cluster/nodemanager.h" | |
40 | #include "cluster/heartbeat.h" | |
41 | #include "cluster/tcp.h" | |
42 | ||
43 | #include "dlm/dlmapi.h" | |
44 | ||
45 | #include "ocfs2_fs.h" | |
ccd979bd MF |
46 | #include "ocfs2_lockid.h" |
47 | ||
ccd979bd MF |
48 | /* Most user visible OCFS2 inodes will have very few pieces of |
49 | * metadata, but larger files (including bitmaps, etc) must be taken | |
50 | * into account when designing an access scheme. We allow a small | |
51 | * amount of inlined blocks to be stored on an array and grow the | |
52 | * structure into a rb tree when necessary. */ | |
53 | #define OCFS2_INODE_MAX_CACHE_ARRAY 2 | |
54 | ||
55 | struct ocfs2_caching_info { | |
56 | unsigned int ci_num_cached; | |
57 | union { | |
58 | sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY]; | |
59 | struct rb_root ci_tree; | |
60 | } ci_cache; | |
61 | }; | |
62 | ||
63 | /* this limits us to 256 nodes | |
64 | * if we need more, we can do a kmalloc for the map */ | |
65 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
66 | struct ocfs2_node_map { | |
67 | u16 num_nodes; | |
68 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
69 | }; | |
70 | ||
71 | enum ocfs2_ast_action { | |
72 | OCFS2_AST_INVALID = 0, | |
73 | OCFS2_AST_ATTACH, | |
74 | OCFS2_AST_CONVERT, | |
75 | OCFS2_AST_DOWNCONVERT, | |
76 | }; | |
77 | ||
78 | /* actions for an unlockast function to take. */ | |
79 | enum ocfs2_unlock_action { | |
80 | OCFS2_UNLOCK_INVALID = 0, | |
81 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
82 | OCFS2_UNLOCK_DROP_LOCK, | |
83 | }; | |
84 | ||
85 | /* ocfs2_lock_res->l_flags flags. */ | |
86 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized | |
87 | * the lvb */ | |
88 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
89 | * dlm_lock */ | |
90 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
91 | * downconvert*/ | |
92 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
93 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
94 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
95 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
96 | * for shutdown paths */ | |
97 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
98 | * when to skip queueing | |
99 | * a lock because it's | |
100 | * about to be | |
101 | * dropped. */ | |
102 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 103 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
ccd979bd MF |
104 | |
105 | struct ocfs2_lock_res_ops; | |
106 | ||
107 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
108 | ||
109 | struct ocfs2_lock_res { | |
110 | void *l_priv; | |
111 | struct ocfs2_lock_res_ops *l_ops; | |
112 | spinlock_t l_lock; | |
113 | ||
114 | struct list_head l_blocked_list; | |
115 | struct list_head l_mask_waiters; | |
116 | ||
117 | enum ocfs2_lock_type l_type; | |
118 | unsigned long l_flags; | |
119 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
120 | int l_level; | |
121 | unsigned int l_ro_holders; | |
122 | unsigned int l_ex_holders; | |
123 | struct dlm_lockstatus l_lksb; | |
124 | ||
125 | /* used from AST/BAST funcs. */ | |
126 | enum ocfs2_ast_action l_action; | |
127 | enum ocfs2_unlock_action l_unlock_action; | |
128 | int l_requested; | |
129 | int l_blocking; | |
130 | ||
131 | wait_queue_head_t l_event; | |
132 | ||
133 | struct list_head l_debug_list; | |
134 | }; | |
135 | ||
136 | struct ocfs2_dlm_debug { | |
137 | struct kref d_refcnt; | |
138 | struct dentry *d_locking_state; | |
139 | struct list_head d_lockres_tracking; | |
140 | }; | |
141 | ||
142 | enum ocfs2_vol_state | |
143 | { | |
144 | VOLUME_INIT = 0, | |
145 | VOLUME_MOUNTED, | |
146 | VOLUME_DISMOUNTED, | |
147 | VOLUME_DISABLED | |
148 | }; | |
149 | ||
150 | struct ocfs2_alloc_stats | |
151 | { | |
152 | atomic_t moves; | |
153 | atomic_t local_data; | |
154 | atomic_t bitmap_data; | |
155 | atomic_t bg_allocs; | |
156 | atomic_t bg_extends; | |
157 | }; | |
158 | ||
159 | enum ocfs2_local_alloc_state | |
160 | { | |
161 | OCFS2_LA_UNUSED = 0, | |
162 | OCFS2_LA_ENABLED, | |
163 | OCFS2_LA_DISABLED | |
164 | }; | |
165 | ||
166 | enum ocfs2_mount_options | |
167 | { | |
168 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
169 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
170 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
171 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
172 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 173 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
ccd979bd MF |
174 | }; |
175 | ||
176 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
177 | #define OCFS2_OSB_HARD_RO 0x0002 | |
178 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
7f1a37e3 | 179 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
ccd979bd MF |
180 | |
181 | struct ocfs2_journal; | |
d85b20e4 | 182 | struct ocfs2_slot_info; |
553abd04 | 183 | struct ocfs2_recovery_map; |
ccd979bd MF |
184 | struct ocfs2_super |
185 | { | |
ccd979bd MF |
186 | struct task_struct *commit_task; |
187 | struct super_block *sb; | |
188 | struct inode *root_inode; | |
189 | struct inode *sys_root_inode; | |
190 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
191 | ||
192 | struct ocfs2_slot_info *slot_info; | |
193 | ||
194 | spinlock_t node_map_lock; | |
ccd979bd | 195 | |
ccd979bd MF |
196 | u64 root_blkno; |
197 | u64 system_dir_blkno; | |
198 | u64 bitmap_blkno; | |
199 | u32 bitmap_cpg; | |
200 | u8 *uuid; | |
201 | char *uuid_str; | |
202 | u8 *vol_label; | |
203 | u64 first_cluster_group_blkno; | |
204 | u32 fs_generation; | |
205 | ||
206 | u32 s_feature_compat; | |
207 | u32 s_feature_incompat; | |
208 | u32 s_feature_ro_compat; | |
209 | ||
210 | /* Protects s_next_generaion, osb_flags. Could protect more on | |
211 | * osb as it's very short lived. */ | |
212 | spinlock_t osb_lock; | |
213 | u32 s_next_generation; | |
214 | unsigned long osb_flags; | |
215 | ||
216 | unsigned long s_mount_opt; | |
7f1a37e3 | 217 | unsigned int s_atime_quantum; |
ccd979bd | 218 | |
fc881fa0 | 219 | unsigned int max_slots; |
ccd979bd | 220 | s16 node_num; |
fc881fa0 JB |
221 | int slot_num; |
222 | int preferred_slot; | |
ccd979bd MF |
223 | int s_sectsize_bits; |
224 | int s_clustersize; | |
225 | int s_clustersize_bits; | |
ccd979bd MF |
226 | |
227 | atomic_t vol_state; | |
c74ec2f7 | 228 | struct mutex recovery_lock; |
553abd04 | 229 | struct ocfs2_recovery_map *recovery_map; |
ccd979bd MF |
230 | struct task_struct *recovery_thread_task; |
231 | int disable_recovery; | |
232 | wait_queue_head_t checkpoint_event; | |
233 | atomic_t needs_checkpoint; | |
234 | struct ocfs2_journal *journal; | |
d147b3d6 | 235 | unsigned long osb_commit_interval; |
ccd979bd | 236 | |
2fbe8d1e | 237 | int local_alloc_size; |
ccd979bd MF |
238 | enum ocfs2_local_alloc_state local_alloc_state; |
239 | struct buffer_head *local_alloc_bh; | |
883d4cae | 240 | u64 la_last_gd; |
ccd979bd MF |
241 | |
242 | /* Next two fields are for local node slot recovery during | |
243 | * mount. */ | |
244 | int dirty; | |
245 | struct ocfs2_dinode *local_alloc_copy; | |
246 | ||
247 | struct ocfs2_alloc_stats alloc_stats; | |
248 | char dev_str[20]; /* "major,minor" of the device */ | |
249 | ||
250 | struct dlm_ctxt *dlm; | |
251 | struct ocfs2_lock_res osb_super_lockres; | |
252 | struct ocfs2_lock_res osb_rename_lockres; | |
253 | struct dlm_eviction_cb osb_eviction_cb; | |
254 | struct ocfs2_dlm_debug *osb_dlm_debug; | |
d24fbcda | 255 | struct dlm_protocol_version osb_locking_proto; |
ccd979bd MF |
256 | |
257 | struct dentry *osb_debug_root; | |
258 | ||
259 | wait_queue_head_t recovery_event; | |
260 | ||
34d024f8 MF |
261 | spinlock_t dc_task_lock; |
262 | struct task_struct *dc_task; | |
263 | wait_queue_head_t dc_event; | |
264 | unsigned long dc_wake_sequence; | |
265 | unsigned long dc_work_sequence; | |
ccd979bd | 266 | |
7ec373cf MF |
267 | /* |
268 | * Any thread can add locks to the list, but the downconvert | |
269 | * thread is the only one allowed to remove locks. Any change | |
270 | * to this rule requires updating | |
271 | * ocfs2_downconvert_thread_do_work(). | |
272 | */ | |
ccd979bd MF |
273 | struct list_head blocked_lock_list; |
274 | unsigned long blocked_lock_count; | |
275 | ||
ccd979bd MF |
276 | wait_queue_head_t osb_mount_event; |
277 | ||
278 | /* Truncate log info */ | |
279 | struct inode *osb_tl_inode; | |
280 | struct buffer_head *osb_tl_bh; | |
c4028958 | 281 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
282 | |
283 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
284 | unsigned int *osb_orphan_wipes; | |
285 | wait_queue_head_t osb_wipe_event; | |
ccd979bd MF |
286 | }; |
287 | ||
288 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd MF |
289 | |
290 | static inline int ocfs2_should_order_data(struct inode *inode) | |
291 | { | |
292 | if (!S_ISREG(inode->i_mode)) | |
293 | return 0; | |
294 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
295 | return 0; | |
296 | return 1; | |
297 | } | |
298 | ||
dcd0538f MF |
299 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
300 | { | |
301 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
302 | return 1; | |
303 | return 0; | |
304 | } | |
305 | ||
328d5752 MF |
306 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
307 | { | |
308 | /* | |
309 | * Support for sparse files is a pre-requisite | |
310 | */ | |
311 | if (!ocfs2_sparse_alloc(osb)) | |
312 | return 0; | |
313 | ||
314 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
315 | return 1; | |
316 | return 0; | |
317 | } | |
318 | ||
15b1e36b MF |
319 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
320 | { | |
321 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
322 | return 1; | |
323 | return 0; | |
324 | } | |
325 | ||
ccd979bd MF |
326 | /* set / clear functions because cluster events can make these happen |
327 | * in parallel so we want the transitions to be atomic. this also | |
328 | * means that any future flags osb_flags must be protected by spinlock | |
329 | * too! */ | |
330 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
331 | unsigned long flag) | |
332 | { | |
333 | spin_lock(&osb->osb_lock); | |
334 | osb->osb_flags |= flag; | |
335 | spin_unlock(&osb->osb_lock); | |
336 | } | |
337 | ||
338 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
339 | int hard) | |
340 | { | |
341 | spin_lock(&osb->osb_lock); | |
342 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
343 | if (hard) | |
344 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
345 | else | |
346 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
347 | spin_unlock(&osb->osb_lock); | |
348 | } | |
349 | ||
350 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
351 | { | |
352 | int ret; | |
353 | ||
354 | spin_lock(&osb->osb_lock); | |
355 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
356 | spin_unlock(&osb->osb_lock); | |
357 | ||
358 | return ret; | |
359 | } | |
360 | ||
361 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
362 | { | |
363 | int ret; | |
364 | ||
365 | spin_lock(&osb->osb_lock); | |
366 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
367 | spin_unlock(&osb->osb_lock); | |
368 | ||
369 | return ret; | |
370 | } | |
371 | ||
c271c5c2 SM |
372 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
373 | { | |
374 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
375 | } | |
376 | ||
ccd979bd MF |
377 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
378 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
379 | ||
380 | #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \ | |
381 | typeof(__di) ____di = (__di); \ | |
382 | ocfs2_error((__sb), \ | |
b0697053 | 383 | "Dinode # %llu has bad signature %.*s", \ |
1ca1a111 | 384 | (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \ |
ccd979bd | 385 | (____di)->i_signature); \ |
1ca1a111 | 386 | } while (0) |
ccd979bd MF |
387 | |
388 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ | |
389 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
390 | ||
391 | #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \ | |
392 | typeof(__eb) ____eb = (__eb); \ | |
393 | ocfs2_error((__sb), \ | |
b0697053 | 394 | "Extent Block # %llu has bad signature %.*s", \ |
1ca1a111 | 395 | (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \ |
ccd979bd | 396 | (____eb)->h_signature); \ |
1ca1a111 | 397 | } while (0) |
ccd979bd MF |
398 | |
399 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ | |
400 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
401 | ||
402 | #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \ | |
403 | typeof(__gd) ____gd = (__gd); \ | |
404 | ocfs2_error((__sb), \ | |
b0697053 | 405 | "Group Descriptor # %llu has bad signature %.*s", \ |
1ca1a111 | 406 | (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \ |
ccd979bd | 407 | (____gd)->bg_signature); \ |
1ca1a111 | 408 | } while (0) |
ccd979bd MF |
409 | |
410 | static inline unsigned long ino_from_blkno(struct super_block *sb, | |
411 | u64 blkno) | |
412 | { | |
413 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
414 | } | |
415 | ||
416 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
417 | u32 clusters) | |
418 | { | |
419 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
420 | sb->s_blocksize_bits; | |
421 | ||
422 | return (u64)clusters << c_to_b_bits; | |
423 | } | |
424 | ||
425 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
426 | u64 blocks) | |
427 | { | |
428 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
429 | sb->s_blocksize_bits; | |
430 | ||
431 | return (u32)(blocks >> b_to_c_bits); | |
432 | } | |
433 | ||
434 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
435 | u64 bytes) | |
436 | { | |
437 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
438 | unsigned int clusters; | |
439 | ||
440 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
441 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
442 | clusters = (unsigned int)(bytes >> cl_bits); | |
443 | ||
444 | return clusters; | |
445 | } | |
446 | ||
447 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
448 | u64 bytes) | |
449 | { | |
450 | bytes += sb->s_blocksize - 1; | |
451 | return bytes >> sb->s_blocksize_bits; | |
452 | } | |
453 | ||
454 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
455 | u32 clusters) | |
456 | { | |
457 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
458 | } | |
459 | ||
460 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, | |
461 | u64 bytes) | |
462 | { | |
463 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
464 | unsigned int clusters; | |
465 | ||
466 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
467 | return (u64)clusters << cl_bits; | |
468 | } | |
469 | ||
470 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
471 | u64 bytes) | |
472 | { | |
473 | u64 blocks; | |
474 | ||
475 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
476 | return blocks << sb->s_blocksize_bits; | |
477 | } | |
478 | ||
479 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
480 | { | |
481 | return (unsigned long)((bytes + 511) >> 9); | |
482 | } | |
483 | ||
9517bac6 MF |
484 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
485 | unsigned long pg_index) | |
486 | { | |
487 | u32 clusters = pg_index; | |
488 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
489 | ||
490 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
491 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
492 | else if (PAGE_CACHE_SHIFT < cbits) | |
493 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
494 | ||
495 | return clusters; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Find the 1st page index which covers the given clusters. | |
500 | */ | |
7c08d70c | 501 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
502 | u32 clusters) |
503 | { | |
504 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 505 | pgoff_t index = clusters; |
9517bac6 MF |
506 | |
507 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 508 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 509 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 510 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
511 | } |
512 | ||
513 | return index; | |
514 | } | |
515 | ||
60b11392 MF |
516 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
517 | { | |
518 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
519 | unsigned int pages_per_cluster = 1; | |
520 | ||
521 | if (PAGE_CACHE_SHIFT < cbits) | |
522 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
523 | ||
524 | return pages_per_cluster; | |
525 | } | |
526 | ||
ccd979bd MF |
527 | #define ocfs2_set_bit ext2_set_bit |
528 | #define ocfs2_clear_bit ext2_clear_bit | |
529 | #define ocfs2_test_bit ext2_test_bit | |
530 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
531 | #endif /* OCFS2_H */ | |
532 |