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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; | |
8ddb7b00 SM |
135 | |
136 | #ifdef CONFIG_OCFS2_FS_STATS | |
137 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
138 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
139 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
140 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
141 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
142 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
143 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
144 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
145 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
146 | #endif | |
ccd979bd MF |
147 | }; |
148 | ||
149 | struct ocfs2_dlm_debug { | |
150 | struct kref d_refcnt; | |
151 | struct dentry *d_locking_state; | |
152 | struct list_head d_lockres_tracking; | |
153 | }; | |
154 | ||
155 | enum ocfs2_vol_state | |
156 | { | |
157 | VOLUME_INIT = 0, | |
158 | VOLUME_MOUNTED, | |
159 | VOLUME_DISMOUNTED, | |
160 | VOLUME_DISABLED | |
161 | }; | |
162 | ||
163 | struct ocfs2_alloc_stats | |
164 | { | |
165 | atomic_t moves; | |
166 | atomic_t local_data; | |
167 | atomic_t bitmap_data; | |
168 | atomic_t bg_allocs; | |
169 | atomic_t bg_extends; | |
170 | }; | |
171 | ||
172 | enum ocfs2_local_alloc_state | |
173 | { | |
174 | OCFS2_LA_UNUSED = 0, | |
175 | OCFS2_LA_ENABLED, | |
176 | OCFS2_LA_DISABLED | |
177 | }; | |
178 | ||
179 | enum ocfs2_mount_options | |
180 | { | |
181 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
182 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
183 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
184 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
185 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 186 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
ccd979bd MF |
187 | }; |
188 | ||
189 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
190 | #define OCFS2_OSB_HARD_RO 0x0002 | |
191 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
7f1a37e3 | 192 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
ccd979bd MF |
193 | |
194 | struct ocfs2_journal; | |
d85b20e4 | 195 | struct ocfs2_slot_info; |
553abd04 | 196 | struct ocfs2_recovery_map; |
ccd979bd MF |
197 | struct ocfs2_super |
198 | { | |
ccd979bd MF |
199 | struct task_struct *commit_task; |
200 | struct super_block *sb; | |
201 | struct inode *root_inode; | |
202 | struct inode *sys_root_inode; | |
203 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
204 | ||
205 | struct ocfs2_slot_info *slot_info; | |
206 | ||
207 | spinlock_t node_map_lock; | |
ccd979bd | 208 | |
ccd979bd MF |
209 | u64 root_blkno; |
210 | u64 system_dir_blkno; | |
211 | u64 bitmap_blkno; | |
212 | u32 bitmap_cpg; | |
213 | u8 *uuid; | |
214 | char *uuid_str; | |
215 | u8 *vol_label; | |
216 | u64 first_cluster_group_blkno; | |
217 | u32 fs_generation; | |
218 | ||
219 | u32 s_feature_compat; | |
220 | u32 s_feature_incompat; | |
221 | u32 s_feature_ro_compat; | |
222 | ||
4d0ddb2c TM |
223 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
224 | * Could protect more on osb as it's very short lived. | |
225 | */ | |
ccd979bd MF |
226 | spinlock_t osb_lock; |
227 | u32 s_next_generation; | |
228 | unsigned long osb_flags; | |
4d0ddb2c TM |
229 | s16 s_inode_steal_slot; |
230 | atomic_t s_num_inodes_stolen; | |
ccd979bd MF |
231 | |
232 | unsigned long s_mount_opt; | |
7f1a37e3 | 233 | unsigned int s_atime_quantum; |
ccd979bd | 234 | |
fc881fa0 | 235 | unsigned int max_slots; |
19fdb624 | 236 | unsigned int node_num; |
fc881fa0 JB |
237 | int slot_num; |
238 | int preferred_slot; | |
ccd979bd MF |
239 | int s_sectsize_bits; |
240 | int s_clustersize; | |
241 | int s_clustersize_bits; | |
ccd979bd MF |
242 | |
243 | atomic_t vol_state; | |
c74ec2f7 | 244 | struct mutex recovery_lock; |
553abd04 | 245 | struct ocfs2_recovery_map *recovery_map; |
ccd979bd MF |
246 | struct task_struct *recovery_thread_task; |
247 | int disable_recovery; | |
248 | wait_queue_head_t checkpoint_event; | |
249 | atomic_t needs_checkpoint; | |
250 | struct ocfs2_journal *journal; | |
d147b3d6 | 251 | unsigned long osb_commit_interval; |
ccd979bd | 252 | |
2fbe8d1e | 253 | int local_alloc_size; |
ccd979bd MF |
254 | enum ocfs2_local_alloc_state local_alloc_state; |
255 | struct buffer_head *local_alloc_bh; | |
883d4cae | 256 | u64 la_last_gd; |
ccd979bd MF |
257 | |
258 | /* Next two fields are for local node slot recovery during | |
259 | * mount. */ | |
260 | int dirty; | |
261 | struct ocfs2_dinode *local_alloc_copy; | |
262 | ||
263 | struct ocfs2_alloc_stats alloc_stats; | |
264 | char dev_str[20]; /* "major,minor" of the device */ | |
265 | ||
b61817e1 | 266 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 267 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
268 | struct ocfs2_lock_res osb_super_lockres; |
269 | struct ocfs2_lock_res osb_rename_lockres; | |
ccd979bd MF |
270 | struct ocfs2_dlm_debug *osb_dlm_debug; |
271 | ||
272 | struct dentry *osb_debug_root; | |
273 | ||
274 | wait_queue_head_t recovery_event; | |
275 | ||
34d024f8 MF |
276 | spinlock_t dc_task_lock; |
277 | struct task_struct *dc_task; | |
278 | wait_queue_head_t dc_event; | |
279 | unsigned long dc_wake_sequence; | |
280 | unsigned long dc_work_sequence; | |
ccd979bd | 281 | |
7ec373cf MF |
282 | /* |
283 | * Any thread can add locks to the list, but the downconvert | |
284 | * thread is the only one allowed to remove locks. Any change | |
285 | * to this rule requires updating | |
286 | * ocfs2_downconvert_thread_do_work(). | |
287 | */ | |
ccd979bd MF |
288 | struct list_head blocked_lock_list; |
289 | unsigned long blocked_lock_count; | |
290 | ||
ccd979bd MF |
291 | wait_queue_head_t osb_mount_event; |
292 | ||
293 | /* Truncate log info */ | |
294 | struct inode *osb_tl_inode; | |
295 | struct buffer_head *osb_tl_bh; | |
c4028958 | 296 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
297 | |
298 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
299 | unsigned int *osb_orphan_wipes; | |
300 | wait_queue_head_t osb_wipe_event; | |
ccd979bd MF |
301 | }; |
302 | ||
303 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd MF |
304 | |
305 | static inline int ocfs2_should_order_data(struct inode *inode) | |
306 | { | |
307 | if (!S_ISREG(inode->i_mode)) | |
308 | return 0; | |
309 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
310 | return 0; | |
311 | return 1; | |
312 | } | |
313 | ||
dcd0538f MF |
314 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
315 | { | |
316 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
317 | return 1; | |
318 | return 0; | |
319 | } | |
320 | ||
328d5752 MF |
321 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
322 | { | |
323 | /* | |
324 | * Support for sparse files is a pre-requisite | |
325 | */ | |
326 | if (!ocfs2_sparse_alloc(osb)) | |
327 | return 0; | |
328 | ||
329 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
330 | return 1; | |
331 | return 0; | |
332 | } | |
333 | ||
15b1e36b MF |
334 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
335 | { | |
336 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
337 | return 1; | |
338 | return 0; | |
339 | } | |
340 | ||
ccd979bd MF |
341 | /* set / clear functions because cluster events can make these happen |
342 | * in parallel so we want the transitions to be atomic. this also | |
343 | * means that any future flags osb_flags must be protected by spinlock | |
344 | * too! */ | |
345 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
346 | unsigned long flag) | |
347 | { | |
348 | spin_lock(&osb->osb_lock); | |
349 | osb->osb_flags |= flag; | |
350 | spin_unlock(&osb->osb_lock); | |
351 | } | |
352 | ||
353 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
354 | int hard) | |
355 | { | |
356 | spin_lock(&osb->osb_lock); | |
357 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
358 | if (hard) | |
359 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
360 | else | |
361 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
362 | spin_unlock(&osb->osb_lock); | |
363 | } | |
364 | ||
365 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
366 | { | |
367 | int ret; | |
368 | ||
369 | spin_lock(&osb->osb_lock); | |
370 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
371 | spin_unlock(&osb->osb_lock); | |
372 | ||
373 | return ret; | |
374 | } | |
375 | ||
376 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
377 | { | |
378 | int ret; | |
379 | ||
380 | spin_lock(&osb->osb_lock); | |
381 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
382 | spin_unlock(&osb->osb_lock); | |
383 | ||
384 | return ret; | |
385 | } | |
386 | ||
b61817e1 JB |
387 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
388 | { | |
389 | return (osb->s_feature_incompat & | |
390 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
391 | } | |
392 | ||
c271c5c2 SM |
393 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
394 | { | |
395 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
396 | } | |
397 | ||
386a2ef8 JB |
398 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
399 | { | |
400 | return (osb->s_feature_incompat & | |
401 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
402 | } | |
403 | ||
404 | ||
ccd979bd MF |
405 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
406 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
407 | ||
408 | #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \ | |
409 | typeof(__di) ____di = (__di); \ | |
410 | ocfs2_error((__sb), \ | |
b0697053 | 411 | "Dinode # %llu has bad signature %.*s", \ |
1ca1a111 | 412 | (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \ |
ccd979bd | 413 | (____di)->i_signature); \ |
1ca1a111 | 414 | } while (0) |
ccd979bd MF |
415 | |
416 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ | |
417 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
418 | ||
419 | #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \ | |
420 | typeof(__eb) ____eb = (__eb); \ | |
421 | ocfs2_error((__sb), \ | |
b0697053 | 422 | "Extent Block # %llu has bad signature %.*s", \ |
1ca1a111 | 423 | (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \ |
ccd979bd | 424 | (____eb)->h_signature); \ |
1ca1a111 | 425 | } while (0) |
ccd979bd MF |
426 | |
427 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ | |
428 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
429 | ||
430 | #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \ | |
431 | typeof(__gd) ____gd = (__gd); \ | |
432 | ocfs2_error((__sb), \ | |
b0697053 | 433 | "Group Descriptor # %llu has bad signature %.*s", \ |
1ca1a111 | 434 | (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \ |
ccd979bd | 435 | (____gd)->bg_signature); \ |
1ca1a111 | 436 | } while (0) |
ccd979bd MF |
437 | |
438 | static inline unsigned long ino_from_blkno(struct super_block *sb, | |
439 | u64 blkno) | |
440 | { | |
441 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
442 | } | |
443 | ||
444 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
445 | u32 clusters) | |
446 | { | |
447 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
448 | sb->s_blocksize_bits; | |
449 | ||
450 | return (u64)clusters << c_to_b_bits; | |
451 | } | |
452 | ||
453 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
454 | u64 blocks) | |
455 | { | |
456 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
457 | sb->s_blocksize_bits; | |
458 | ||
459 | return (u32)(blocks >> b_to_c_bits); | |
460 | } | |
461 | ||
462 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
463 | u64 bytes) | |
464 | { | |
465 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
466 | unsigned int clusters; | |
467 | ||
468 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
469 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
470 | clusters = (unsigned int)(bytes >> cl_bits); | |
471 | ||
472 | return clusters; | |
473 | } | |
474 | ||
475 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
476 | u64 bytes) | |
477 | { | |
478 | bytes += sb->s_blocksize - 1; | |
479 | return bytes >> sb->s_blocksize_bits; | |
480 | } | |
481 | ||
482 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
483 | u32 clusters) | |
484 | { | |
485 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
486 | } | |
487 | ||
488 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, | |
489 | u64 bytes) | |
490 | { | |
491 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
492 | unsigned int clusters; | |
493 | ||
494 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
495 | return (u64)clusters << cl_bits; | |
496 | } | |
497 | ||
498 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
499 | u64 bytes) | |
500 | { | |
501 | u64 blocks; | |
502 | ||
503 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
504 | return blocks << sb->s_blocksize_bits; | |
505 | } | |
506 | ||
507 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
508 | { | |
509 | return (unsigned long)((bytes + 511) >> 9); | |
510 | } | |
511 | ||
9517bac6 MF |
512 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
513 | unsigned long pg_index) | |
514 | { | |
515 | u32 clusters = pg_index; | |
516 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
517 | ||
518 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
519 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
520 | else if (PAGE_CACHE_SHIFT < cbits) | |
521 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
522 | ||
523 | return clusters; | |
524 | } | |
525 | ||
526 | /* | |
527 | * Find the 1st page index which covers the given clusters. | |
528 | */ | |
7c08d70c | 529 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
530 | u32 clusters) |
531 | { | |
532 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 533 | pgoff_t index = clusters; |
9517bac6 MF |
534 | |
535 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 536 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 537 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 538 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
539 | } |
540 | ||
541 | return index; | |
542 | } | |
543 | ||
60b11392 MF |
544 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
545 | { | |
546 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
547 | unsigned int pages_per_cluster = 1; | |
548 | ||
549 | if (PAGE_CACHE_SHIFT < cbits) | |
550 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
551 | ||
552 | return pages_per_cluster; | |
553 | } | |
554 | ||
4d0ddb2c TM |
555 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
556 | { | |
557 | spin_lock(&osb->osb_lock); | |
558 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
559 | spin_unlock(&osb->osb_lock); | |
560 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
561 | } | |
562 | ||
563 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, | |
564 | s16 slot) | |
565 | { | |
566 | spin_lock(&osb->osb_lock); | |
567 | osb->s_inode_steal_slot = slot; | |
568 | spin_unlock(&osb->osb_lock); | |
569 | } | |
570 | ||
571 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
572 | { | |
573 | s16 slot; | |
574 | ||
575 | spin_lock(&osb->osb_lock); | |
576 | slot = osb->s_inode_steal_slot; | |
577 | spin_unlock(&osb->osb_lock); | |
578 | ||
579 | return slot; | |
580 | } | |
581 | ||
ccd979bd MF |
582 | #define ocfs2_set_bit ext2_set_bit |
583 | #define ocfs2_clear_bit ext2_clear_bit | |
584 | #define ocfs2_test_bit ext2_test_bit | |
585 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
586 | #endif /* OCFS2_H */ | |
587 |