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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 | 38 | |
8f2c9c1b JB |
39 | /* For union ocfs2_dlm_lksb */ |
40 | #include "stackglue.h" | |
ccd979bd MF |
41 | |
42 | #include "ocfs2_fs.h" | |
ccd979bd MF |
43 | #include "ocfs2_lockid.h" |
44 | ||
ccd979bd MF |
45 | /* Most user visible OCFS2 inodes will have very few pieces of |
46 | * metadata, but larger files (including bitmaps, etc) must be taken | |
47 | * into account when designing an access scheme. We allow a small | |
48 | * amount of inlined blocks to be stored on an array and grow the | |
49 | * structure into a rb tree when necessary. */ | |
50 | #define OCFS2_INODE_MAX_CACHE_ARRAY 2 | |
51 | ||
52 | struct ocfs2_caching_info { | |
53 | unsigned int ci_num_cached; | |
54 | union { | |
55 | sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY]; | |
56 | struct rb_root ci_tree; | |
57 | } ci_cache; | |
58 | }; | |
59 | ||
60 | /* this limits us to 256 nodes | |
61 | * if we need more, we can do a kmalloc for the map */ | |
62 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
63 | struct ocfs2_node_map { | |
64 | u16 num_nodes; | |
65 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
66 | }; | |
67 | ||
68 | enum ocfs2_ast_action { | |
69 | OCFS2_AST_INVALID = 0, | |
70 | OCFS2_AST_ATTACH, | |
71 | OCFS2_AST_CONVERT, | |
72 | OCFS2_AST_DOWNCONVERT, | |
73 | }; | |
74 | ||
75 | /* actions for an unlockast function to take. */ | |
76 | enum ocfs2_unlock_action { | |
77 | OCFS2_UNLOCK_INVALID = 0, | |
78 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
79 | OCFS2_UNLOCK_DROP_LOCK, | |
80 | }; | |
81 | ||
82 | /* ocfs2_lock_res->l_flags flags. */ | |
83 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized | |
84 | * the lvb */ | |
85 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
86 | * dlm_lock */ | |
87 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
88 | * downconvert*/ | |
89 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
90 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
91 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
92 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
93 | * for shutdown paths */ | |
94 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
95 | * when to skip queueing | |
96 | * a lock because it's | |
97 | * about to be | |
98 | * dropped. */ | |
99 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 100 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
101 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
102 | call to dlm_lock. Only | |
103 | exists with BUSY set. */ | |
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; | |
8f2c9c1b | 123 | union ocfs2_dlm_lksb l_lksb; |
ccd979bd MF |
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; | |
de551246 | 130 | unsigned int l_pending_gen; |
ccd979bd MF |
131 | |
132 | wait_queue_head_t l_event; | |
133 | ||
134 | struct list_head l_debug_list; | |
135 | }; | |
136 | ||
137 | struct ocfs2_dlm_debug { | |
138 | struct kref d_refcnt; | |
139 | struct dentry *d_locking_state; | |
140 | struct list_head d_lockres_tracking; | |
141 | }; | |
142 | ||
143 | enum ocfs2_vol_state | |
144 | { | |
145 | VOLUME_INIT = 0, | |
146 | VOLUME_MOUNTED, | |
147 | VOLUME_DISMOUNTED, | |
148 | VOLUME_DISABLED | |
149 | }; | |
150 | ||
151 | struct ocfs2_alloc_stats | |
152 | { | |
153 | atomic_t moves; | |
154 | atomic_t local_data; | |
155 | atomic_t bitmap_data; | |
156 | atomic_t bg_allocs; | |
157 | atomic_t bg_extends; | |
158 | }; | |
159 | ||
160 | enum ocfs2_local_alloc_state | |
161 | { | |
162 | OCFS2_LA_UNUSED = 0, | |
163 | OCFS2_LA_ENABLED, | |
164 | OCFS2_LA_DISABLED | |
165 | }; | |
166 | ||
167 | enum ocfs2_mount_options | |
168 | { | |
169 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
170 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
171 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
172 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
173 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 174 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
ccd979bd MF |
175 | }; |
176 | ||
177 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
178 | #define OCFS2_OSB_HARD_RO 0x0002 | |
179 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
7f1a37e3 | 180 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
ccd979bd MF |
181 | |
182 | struct ocfs2_journal; | |
d85b20e4 | 183 | struct ocfs2_slot_info; |
553abd04 | 184 | struct ocfs2_recovery_map; |
ccd979bd MF |
185 | struct ocfs2_super |
186 | { | |
ccd979bd MF |
187 | struct task_struct *commit_task; |
188 | struct super_block *sb; | |
189 | struct inode *root_inode; | |
190 | struct inode *sys_root_inode; | |
191 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
192 | ||
193 | struct ocfs2_slot_info *slot_info; | |
194 | ||
195 | spinlock_t node_map_lock; | |
ccd979bd | 196 | |
ccd979bd MF |
197 | u64 root_blkno; |
198 | u64 system_dir_blkno; | |
199 | u64 bitmap_blkno; | |
200 | u32 bitmap_cpg; | |
201 | u8 *uuid; | |
202 | char *uuid_str; | |
203 | u8 *vol_label; | |
204 | u64 first_cluster_group_blkno; | |
205 | u32 fs_generation; | |
206 | ||
207 | u32 s_feature_compat; | |
208 | u32 s_feature_incompat; | |
209 | u32 s_feature_ro_compat; | |
210 | ||
4d0ddb2c TM |
211 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
212 | * Could protect more on osb as it's very short lived. | |
213 | */ | |
ccd979bd MF |
214 | spinlock_t osb_lock; |
215 | u32 s_next_generation; | |
216 | unsigned long osb_flags; | |
4d0ddb2c TM |
217 | s16 s_inode_steal_slot; |
218 | atomic_t s_num_inodes_stolen; | |
ccd979bd MF |
219 | |
220 | unsigned long s_mount_opt; | |
7f1a37e3 | 221 | unsigned int s_atime_quantum; |
ccd979bd | 222 | |
fc881fa0 | 223 | unsigned int max_slots; |
19fdb624 | 224 | unsigned int node_num; |
fc881fa0 JB |
225 | int slot_num; |
226 | int preferred_slot; | |
ccd979bd MF |
227 | int s_sectsize_bits; |
228 | int s_clustersize; | |
229 | int s_clustersize_bits; | |
ccd979bd MF |
230 | |
231 | atomic_t vol_state; | |
c74ec2f7 | 232 | struct mutex recovery_lock; |
553abd04 | 233 | struct ocfs2_recovery_map *recovery_map; |
ccd979bd MF |
234 | struct task_struct *recovery_thread_task; |
235 | int disable_recovery; | |
236 | wait_queue_head_t checkpoint_event; | |
237 | atomic_t needs_checkpoint; | |
238 | struct ocfs2_journal *journal; | |
d147b3d6 | 239 | unsigned long osb_commit_interval; |
ccd979bd | 240 | |
2fbe8d1e | 241 | int local_alloc_size; |
ccd979bd MF |
242 | enum ocfs2_local_alloc_state local_alloc_state; |
243 | struct buffer_head *local_alloc_bh; | |
883d4cae | 244 | u64 la_last_gd; |
ccd979bd MF |
245 | |
246 | /* Next two fields are for local node slot recovery during | |
247 | * mount. */ | |
248 | int dirty; | |
249 | struct ocfs2_dinode *local_alloc_copy; | |
250 | ||
251 | struct ocfs2_alloc_stats alloc_stats; | |
252 | char dev_str[20]; /* "major,minor" of the device */ | |
253 | ||
b61817e1 | 254 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 255 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
256 | struct ocfs2_lock_res osb_super_lockres; |
257 | struct ocfs2_lock_res osb_rename_lockres; | |
ccd979bd MF |
258 | struct ocfs2_dlm_debug *osb_dlm_debug; |
259 | ||
260 | struct dentry *osb_debug_root; | |
261 | ||
262 | wait_queue_head_t recovery_event; | |
263 | ||
34d024f8 MF |
264 | spinlock_t dc_task_lock; |
265 | struct task_struct *dc_task; | |
266 | wait_queue_head_t dc_event; | |
267 | unsigned long dc_wake_sequence; | |
268 | unsigned long dc_work_sequence; | |
ccd979bd | 269 | |
7ec373cf MF |
270 | /* |
271 | * Any thread can add locks to the list, but the downconvert | |
272 | * thread is the only one allowed to remove locks. Any change | |
273 | * to this rule requires updating | |
274 | * ocfs2_downconvert_thread_do_work(). | |
275 | */ | |
ccd979bd MF |
276 | struct list_head blocked_lock_list; |
277 | unsigned long blocked_lock_count; | |
278 | ||
ccd979bd MF |
279 | wait_queue_head_t osb_mount_event; |
280 | ||
281 | /* Truncate log info */ | |
282 | struct inode *osb_tl_inode; | |
283 | struct buffer_head *osb_tl_bh; | |
c4028958 | 284 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
285 | |
286 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
287 | unsigned int *osb_orphan_wipes; | |
288 | wait_queue_head_t osb_wipe_event; | |
ccd979bd MF |
289 | }; |
290 | ||
291 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd MF |
292 | |
293 | static inline int ocfs2_should_order_data(struct inode *inode) | |
294 | { | |
295 | if (!S_ISREG(inode->i_mode)) | |
296 | return 0; | |
297 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
298 | return 0; | |
299 | return 1; | |
300 | } | |
301 | ||
dcd0538f MF |
302 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
303 | { | |
304 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
305 | return 1; | |
306 | return 0; | |
307 | } | |
308 | ||
328d5752 MF |
309 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
310 | { | |
311 | /* | |
312 | * Support for sparse files is a pre-requisite | |
313 | */ | |
314 | if (!ocfs2_sparse_alloc(osb)) | |
315 | return 0; | |
316 | ||
317 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
318 | return 1; | |
319 | return 0; | |
320 | } | |
321 | ||
15b1e36b MF |
322 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
323 | { | |
324 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
325 | return 1; | |
326 | return 0; | |
327 | } | |
328 | ||
ccd979bd MF |
329 | /* set / clear functions because cluster events can make these happen |
330 | * in parallel so we want the transitions to be atomic. this also | |
331 | * means that any future flags osb_flags must be protected by spinlock | |
332 | * too! */ | |
333 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
334 | unsigned long flag) | |
335 | { | |
336 | spin_lock(&osb->osb_lock); | |
337 | osb->osb_flags |= flag; | |
338 | spin_unlock(&osb->osb_lock); | |
339 | } | |
340 | ||
341 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
342 | int hard) | |
343 | { | |
344 | spin_lock(&osb->osb_lock); | |
345 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
346 | if (hard) | |
347 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
348 | else | |
349 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
350 | spin_unlock(&osb->osb_lock); | |
351 | } | |
352 | ||
353 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
354 | { | |
355 | int ret; | |
356 | ||
357 | spin_lock(&osb->osb_lock); | |
358 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
359 | spin_unlock(&osb->osb_lock); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
365 | { | |
366 | int ret; | |
367 | ||
368 | spin_lock(&osb->osb_lock); | |
369 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
370 | spin_unlock(&osb->osb_lock); | |
371 | ||
372 | return ret; | |
373 | } | |
374 | ||
b61817e1 JB |
375 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
376 | { | |
377 | return (osb->s_feature_incompat & | |
378 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
379 | } | |
380 | ||
c271c5c2 SM |
381 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
382 | { | |
383 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
384 | } | |
385 | ||
386a2ef8 JB |
386 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
387 | { | |
388 | return (osb->s_feature_incompat & | |
389 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
390 | } | |
391 | ||
392 | ||
ccd979bd MF |
393 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
394 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
395 | ||
396 | #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \ | |
397 | typeof(__di) ____di = (__di); \ | |
398 | ocfs2_error((__sb), \ | |
b0697053 | 399 | "Dinode # %llu has bad signature %.*s", \ |
1ca1a111 | 400 | (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \ |
ccd979bd | 401 | (____di)->i_signature); \ |
1ca1a111 | 402 | } while (0) |
ccd979bd MF |
403 | |
404 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ | |
405 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
406 | ||
407 | #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \ | |
408 | typeof(__eb) ____eb = (__eb); \ | |
409 | ocfs2_error((__sb), \ | |
b0697053 | 410 | "Extent Block # %llu has bad signature %.*s", \ |
1ca1a111 | 411 | (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \ |
ccd979bd | 412 | (____eb)->h_signature); \ |
1ca1a111 | 413 | } while (0) |
ccd979bd MF |
414 | |
415 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ | |
416 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
417 | ||
418 | #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \ | |
419 | typeof(__gd) ____gd = (__gd); \ | |
420 | ocfs2_error((__sb), \ | |
b0697053 | 421 | "Group Descriptor # %llu has bad signature %.*s", \ |
1ca1a111 | 422 | (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \ |
ccd979bd | 423 | (____gd)->bg_signature); \ |
1ca1a111 | 424 | } while (0) |
ccd979bd MF |
425 | |
426 | static inline unsigned long ino_from_blkno(struct super_block *sb, | |
427 | u64 blkno) | |
428 | { | |
429 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
430 | } | |
431 | ||
432 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
433 | u32 clusters) | |
434 | { | |
435 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
436 | sb->s_blocksize_bits; | |
437 | ||
438 | return (u64)clusters << c_to_b_bits; | |
439 | } | |
440 | ||
441 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
442 | u64 blocks) | |
443 | { | |
444 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
445 | sb->s_blocksize_bits; | |
446 | ||
447 | return (u32)(blocks >> b_to_c_bits); | |
448 | } | |
449 | ||
450 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
451 | u64 bytes) | |
452 | { | |
453 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
454 | unsigned int clusters; | |
455 | ||
456 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
457 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
458 | clusters = (unsigned int)(bytes >> cl_bits); | |
459 | ||
460 | return clusters; | |
461 | } | |
462 | ||
463 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
464 | u64 bytes) | |
465 | { | |
466 | bytes += sb->s_blocksize - 1; | |
467 | return bytes >> sb->s_blocksize_bits; | |
468 | } | |
469 | ||
470 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
471 | u32 clusters) | |
472 | { | |
473 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
474 | } | |
475 | ||
476 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, | |
477 | u64 bytes) | |
478 | { | |
479 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
480 | unsigned int clusters; | |
481 | ||
482 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
483 | return (u64)clusters << cl_bits; | |
484 | } | |
485 | ||
486 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
487 | u64 bytes) | |
488 | { | |
489 | u64 blocks; | |
490 | ||
491 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
492 | return blocks << sb->s_blocksize_bits; | |
493 | } | |
494 | ||
495 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
496 | { | |
497 | return (unsigned long)((bytes + 511) >> 9); | |
498 | } | |
499 | ||
9517bac6 MF |
500 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
501 | unsigned long pg_index) | |
502 | { | |
503 | u32 clusters = pg_index; | |
504 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
505 | ||
506 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
507 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
508 | else if (PAGE_CACHE_SHIFT < cbits) | |
509 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
510 | ||
511 | return clusters; | |
512 | } | |
513 | ||
514 | /* | |
515 | * Find the 1st page index which covers the given clusters. | |
516 | */ | |
7c08d70c | 517 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
518 | u32 clusters) |
519 | { | |
520 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 521 | pgoff_t index = clusters; |
9517bac6 MF |
522 | |
523 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 524 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 525 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 526 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
527 | } |
528 | ||
529 | return index; | |
530 | } | |
531 | ||
60b11392 MF |
532 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
533 | { | |
534 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
535 | unsigned int pages_per_cluster = 1; | |
536 | ||
537 | if (PAGE_CACHE_SHIFT < cbits) | |
538 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
539 | ||
540 | return pages_per_cluster; | |
541 | } | |
542 | ||
4d0ddb2c TM |
543 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
544 | { | |
545 | spin_lock(&osb->osb_lock); | |
546 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
547 | spin_unlock(&osb->osb_lock); | |
548 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
549 | } | |
550 | ||
551 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, | |
552 | s16 slot) | |
553 | { | |
554 | spin_lock(&osb->osb_lock); | |
555 | osb->s_inode_steal_slot = slot; | |
556 | spin_unlock(&osb->osb_lock); | |
557 | } | |
558 | ||
559 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
560 | { | |
561 | s16 slot; | |
562 | ||
563 | spin_lock(&osb->osb_lock); | |
564 | slot = osb->s_inode_steal_slot; | |
565 | spin_unlock(&osb->osb_lock); | |
566 | ||
567 | return slot; | |
568 | } | |
569 | ||
ccd979bd MF |
570 | #define ocfs2_set_bit ext2_set_bit |
571 | #define ocfs2_clear_bit ext2_clear_bit | |
572 | #define ocfs2_test_bit ext2_test_bit | |
573 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
574 | #endif /* OCFS2_H */ | |
575 |