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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> |
2b4e30fb JB |
37 | #ifndef CONFIG_OCFS2_COMPAT_JBD |
38 | # include <linux/jbd2.h> | |
39 | #else | |
40 | # include <linux/jbd.h> | |
41 | # include "ocfs2_jbd_compat.h" | |
42 | #endif | |
ccd979bd | 43 | |
8f2c9c1b JB |
44 | /* For union ocfs2_dlm_lksb */ |
45 | #include "stackglue.h" | |
ccd979bd MF |
46 | |
47 | #include "ocfs2_fs.h" | |
ccd979bd MF |
48 | #include "ocfs2_lockid.h" |
49 | ||
ccd979bd MF |
50 | /* Most user visible OCFS2 inodes will have very few pieces of |
51 | * metadata, but larger files (including bitmaps, etc) must be taken | |
52 | * into account when designing an access scheme. We allow a small | |
53 | * amount of inlined blocks to be stored on an array and grow the | |
54 | * structure into a rb tree when necessary. */ | |
55 | #define OCFS2_INODE_MAX_CACHE_ARRAY 2 | |
56 | ||
57 | struct ocfs2_caching_info { | |
58 | unsigned int ci_num_cached; | |
59 | union { | |
60 | sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY]; | |
61 | struct rb_root ci_tree; | |
62 | } ci_cache; | |
63 | }; | |
64 | ||
65 | /* this limits us to 256 nodes | |
66 | * if we need more, we can do a kmalloc for the map */ | |
67 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
68 | struct ocfs2_node_map { | |
69 | u16 num_nodes; | |
70 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
71 | }; | |
72 | ||
73 | enum ocfs2_ast_action { | |
74 | OCFS2_AST_INVALID = 0, | |
75 | OCFS2_AST_ATTACH, | |
76 | OCFS2_AST_CONVERT, | |
77 | OCFS2_AST_DOWNCONVERT, | |
78 | }; | |
79 | ||
80 | /* actions for an unlockast function to take. */ | |
81 | enum ocfs2_unlock_action { | |
82 | OCFS2_UNLOCK_INVALID = 0, | |
83 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
84 | OCFS2_UNLOCK_DROP_LOCK, | |
85 | }; | |
86 | ||
87 | /* ocfs2_lock_res->l_flags flags. */ | |
3b5da018 | 88 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
ccd979bd MF |
89 | * the lvb */ |
90 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
91 | * dlm_lock */ | |
92 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
93 | * downconvert*/ | |
94 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
95 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
96 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
97 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
98 | * for shutdown paths */ | |
99 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
100 | * when to skip queueing | |
101 | * a lock because it's | |
102 | * about to be | |
103 | * dropped. */ | |
104 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 105 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
106 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
107 | call to dlm_lock. Only | |
108 | exists with BUSY set. */ | |
ccd979bd MF |
109 | |
110 | struct ocfs2_lock_res_ops; | |
111 | ||
112 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
113 | ||
114 | struct ocfs2_lock_res { | |
115 | void *l_priv; | |
116 | struct ocfs2_lock_res_ops *l_ops; | |
117 | spinlock_t l_lock; | |
118 | ||
119 | struct list_head l_blocked_list; | |
120 | struct list_head l_mask_waiters; | |
121 | ||
122 | enum ocfs2_lock_type l_type; | |
123 | unsigned long l_flags; | |
124 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
125 | int l_level; | |
126 | unsigned int l_ro_holders; | |
127 | unsigned int l_ex_holders; | |
8f2c9c1b | 128 | union ocfs2_dlm_lksb l_lksb; |
ccd979bd MF |
129 | |
130 | /* used from AST/BAST funcs. */ | |
131 | enum ocfs2_ast_action l_action; | |
132 | enum ocfs2_unlock_action l_unlock_action; | |
133 | int l_requested; | |
134 | int l_blocking; | |
de551246 | 135 | unsigned int l_pending_gen; |
ccd979bd MF |
136 | |
137 | wait_queue_head_t l_event; | |
138 | ||
139 | struct list_head l_debug_list; | |
8ddb7b00 SM |
140 | |
141 | #ifdef CONFIG_OCFS2_FS_STATS | |
142 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
143 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
144 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
145 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
146 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
147 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
148 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
149 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
150 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
151 | #endif | |
ccd979bd MF |
152 | }; |
153 | ||
154 | struct ocfs2_dlm_debug { | |
155 | struct kref d_refcnt; | |
156 | struct dentry *d_locking_state; | |
157 | struct list_head d_lockres_tracking; | |
158 | }; | |
159 | ||
160 | enum ocfs2_vol_state | |
161 | { | |
162 | VOLUME_INIT = 0, | |
163 | VOLUME_MOUNTED, | |
19ece546 | 164 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
165 | VOLUME_DISMOUNTED, |
166 | VOLUME_DISABLED | |
167 | }; | |
168 | ||
169 | struct ocfs2_alloc_stats | |
170 | { | |
171 | atomic_t moves; | |
172 | atomic_t local_data; | |
173 | atomic_t bitmap_data; | |
174 | atomic_t bg_allocs; | |
175 | atomic_t bg_extends; | |
176 | }; | |
177 | ||
178 | enum ocfs2_local_alloc_state | |
179 | { | |
9c7af40b MF |
180 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
181 | * this mountpoint. */ | |
182 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
183 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
184 | * of bits has been reduced. */ | |
185 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
186 | * disabled. */ | |
ccd979bd MF |
187 | }; |
188 | ||
189 | enum ocfs2_mount_options | |
190 | { | |
191 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
192 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
193 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
194 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
195 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 196 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 197 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 198 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
929fb014 | 199 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* POSIX access control lists */ |
19ece546 JK |
200 | OCFS2_MOUNT_USRQUOTA = 1 << 9, /* We support user quotas */ |
201 | OCFS2_MOUNT_GRPQUOTA = 1 << 10, /* We support group quotas */ | |
ccd979bd MF |
202 | }; |
203 | ||
204 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
205 | #define OCFS2_OSB_HARD_RO 0x0002 | |
206 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
7f1a37e3 | 207 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
ccd979bd MF |
208 | |
209 | struct ocfs2_journal; | |
d85b20e4 | 210 | struct ocfs2_slot_info; |
553abd04 | 211 | struct ocfs2_recovery_map; |
2205363d | 212 | struct ocfs2_quota_recovery; |
ea455f8a | 213 | struct ocfs2_dentry_lock; |
ccd979bd MF |
214 | struct ocfs2_super |
215 | { | |
ccd979bd MF |
216 | struct task_struct *commit_task; |
217 | struct super_block *sb; | |
218 | struct inode *root_inode; | |
219 | struct inode *sys_root_inode; | |
220 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
221 | ||
222 | struct ocfs2_slot_info *slot_info; | |
223 | ||
539d8264 SM |
224 | u32 *slot_recovery_generations; |
225 | ||
ccd979bd | 226 | spinlock_t node_map_lock; |
ccd979bd | 227 | |
ccd979bd MF |
228 | u64 root_blkno; |
229 | u64 system_dir_blkno; | |
230 | u64 bitmap_blkno; | |
231 | u32 bitmap_cpg; | |
232 | u8 *uuid; | |
233 | char *uuid_str; | |
cf1d6c76 | 234 | u32 uuid_hash; |
ccd979bd MF |
235 | u8 *vol_label; |
236 | u64 first_cluster_group_blkno; | |
237 | u32 fs_generation; | |
238 | ||
239 | u32 s_feature_compat; | |
240 | u32 s_feature_incompat; | |
241 | u32 s_feature_ro_compat; | |
242 | ||
4d0ddb2c TM |
243 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
244 | * Could protect more on osb as it's very short lived. | |
245 | */ | |
ccd979bd MF |
246 | spinlock_t osb_lock; |
247 | u32 s_next_generation; | |
248 | unsigned long osb_flags; | |
4d0ddb2c TM |
249 | s16 s_inode_steal_slot; |
250 | atomic_t s_num_inodes_stolen; | |
ccd979bd MF |
251 | |
252 | unsigned long s_mount_opt; | |
7f1a37e3 | 253 | unsigned int s_atime_quantum; |
ccd979bd | 254 | |
fc881fa0 | 255 | unsigned int max_slots; |
19fdb624 | 256 | unsigned int node_num; |
fc881fa0 JB |
257 | int slot_num; |
258 | int preferred_slot; | |
ccd979bd MF |
259 | int s_sectsize_bits; |
260 | int s_clustersize; | |
261 | int s_clustersize_bits; | |
fdd77704 | 262 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
263 | |
264 | atomic_t vol_state; | |
c74ec2f7 | 265 | struct mutex recovery_lock; |
553abd04 | 266 | struct ocfs2_recovery_map *recovery_map; |
ccd979bd MF |
267 | struct task_struct *recovery_thread_task; |
268 | int disable_recovery; | |
269 | wait_queue_head_t checkpoint_event; | |
270 | atomic_t needs_checkpoint; | |
271 | struct ocfs2_journal *journal; | |
d147b3d6 | 272 | unsigned long osb_commit_interval; |
ccd979bd | 273 | |
9c7af40b MF |
274 | struct delayed_work la_enable_wq; |
275 | ||
276 | /* | |
277 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
278 | * local_alloc_bits. Reads can be done under either lock. | |
279 | */ | |
ebcee4b5 | 280 | unsigned int local_alloc_bits; |
9c7af40b MF |
281 | unsigned int local_alloc_default_bits; |
282 | ||
283 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
284 | * by osb_lock */ | |
285 | ||
ccd979bd | 286 | struct buffer_head *local_alloc_bh; |
9c7af40b | 287 | |
883d4cae | 288 | u64 la_last_gd; |
ccd979bd | 289 | |
9a8ff578 MF |
290 | #ifdef CONFIG_OCFS2_FS_STATS |
291 | struct dentry *local_alloc_debug; | |
292 | char *local_alloc_debug_buf; | |
293 | #endif | |
294 | ||
2205363d | 295 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
296 | * mount. */ |
297 | int dirty; | |
298 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 299 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd MF |
300 | |
301 | struct ocfs2_alloc_stats alloc_stats; | |
302 | char dev_str[20]; /* "major,minor" of the device */ | |
303 | ||
b61817e1 | 304 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 305 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
306 | struct ocfs2_lock_res osb_super_lockres; |
307 | struct ocfs2_lock_res osb_rename_lockres; | |
ccd979bd MF |
308 | struct ocfs2_dlm_debug *osb_dlm_debug; |
309 | ||
310 | struct dentry *osb_debug_root; | |
311 | ||
312 | wait_queue_head_t recovery_event; | |
313 | ||
34d024f8 MF |
314 | spinlock_t dc_task_lock; |
315 | struct task_struct *dc_task; | |
316 | wait_queue_head_t dc_event; | |
317 | unsigned long dc_wake_sequence; | |
318 | unsigned long dc_work_sequence; | |
ccd979bd | 319 | |
7ec373cf MF |
320 | /* |
321 | * Any thread can add locks to the list, but the downconvert | |
322 | * thread is the only one allowed to remove locks. Any change | |
323 | * to this rule requires updating | |
324 | * ocfs2_downconvert_thread_do_work(). | |
325 | */ | |
ccd979bd MF |
326 | struct list_head blocked_lock_list; |
327 | unsigned long blocked_lock_count; | |
328 | ||
ea455f8a JK |
329 | /* List of dentry locks to release. Anyone can add locks to |
330 | * the list, ocfs2_wq processes the list */ | |
331 | struct ocfs2_dentry_lock *dentry_lock_list; | |
332 | struct work_struct dentry_lock_work; | |
333 | ||
ccd979bd MF |
334 | wait_queue_head_t osb_mount_event; |
335 | ||
336 | /* Truncate log info */ | |
337 | struct inode *osb_tl_inode; | |
338 | struct buffer_head *osb_tl_bh; | |
c4028958 | 339 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
340 | |
341 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
342 | unsigned int *osb_orphan_wipes; | |
343 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a TM |
344 | |
345 | /* used to protect metaecc calculation check of xattr. */ | |
346 | spinlock_t osb_xattr_lock; | |
ccd979bd MF |
347 | }; |
348 | ||
349 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 350 | |
13723d00 JB |
351 | /* Useful typedef for passing around journal access functions */ |
352 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, struct inode *inode, | |
353 | struct buffer_head *bh, int type); | |
354 | ||
ccd979bd MF |
355 | static inline int ocfs2_should_order_data(struct inode *inode) |
356 | { | |
357 | if (!S_ISREG(inode->i_mode)) | |
358 | return 0; | |
359 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
360 | return 0; | |
361 | return 1; | |
362 | } | |
363 | ||
dcd0538f MF |
364 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
365 | { | |
366 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
367 | return 1; | |
368 | return 0; | |
369 | } | |
370 | ||
328d5752 MF |
371 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
372 | { | |
373 | /* | |
374 | * Support for sparse files is a pre-requisite | |
375 | */ | |
376 | if (!ocfs2_sparse_alloc(osb)) | |
377 | return 0; | |
378 | ||
379 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
380 | return 1; | |
381 | return 0; | |
382 | } | |
383 | ||
15b1e36b MF |
384 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
385 | { | |
386 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
387 | return 1; | |
388 | return 0; | |
389 | } | |
390 | ||
8154da3d TY |
391 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
392 | { | |
393 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
394 | return 1; | |
395 | return 0; | |
396 | } | |
397 | ||
70ad1ba7 JB |
398 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
399 | { | |
400 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
401 | return 1; | |
402 | return 0; | |
403 | } | |
404 | ||
ccd979bd MF |
405 | /* set / clear functions because cluster events can make these happen |
406 | * in parallel so we want the transitions to be atomic. this also | |
407 | * means that any future flags osb_flags must be protected by spinlock | |
408 | * too! */ | |
409 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
410 | unsigned long flag) | |
411 | { | |
412 | spin_lock(&osb->osb_lock); | |
413 | osb->osb_flags |= flag; | |
414 | spin_unlock(&osb->osb_lock); | |
415 | } | |
416 | ||
417 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
418 | int hard) | |
419 | { | |
420 | spin_lock(&osb->osb_lock); | |
421 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
422 | if (hard) | |
423 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
424 | else | |
425 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
426 | spin_unlock(&osb->osb_lock); | |
427 | } | |
428 | ||
429 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
430 | { | |
431 | int ret; | |
432 | ||
433 | spin_lock(&osb->osb_lock); | |
434 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
435 | spin_unlock(&osb->osb_lock); | |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
440 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
441 | { | |
442 | int ret; | |
443 | ||
444 | spin_lock(&osb->osb_lock); | |
445 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
446 | spin_unlock(&osb->osb_lock); | |
447 | ||
448 | return ret; | |
449 | } | |
450 | ||
b61817e1 JB |
451 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
452 | { | |
453 | return (osb->s_feature_incompat & | |
454 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
455 | } | |
456 | ||
c271c5c2 SM |
457 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
458 | { | |
459 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
460 | } | |
461 | ||
386a2ef8 JB |
462 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
463 | { | |
464 | return (osb->s_feature_incompat & | |
465 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
466 | } | |
467 | ||
468 | ||
ccd979bd MF |
469 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
470 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
471 | ||
ccd979bd MF |
472 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
473 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
474 | ||
ccd979bd MF |
475 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
476 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
477 | ||
ccd979bd | 478 | |
f6087fb7 JB |
479 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
480 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
481 | ||
87d35a74 MF |
482 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
483 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
484 | ||
ccd979bd MF |
485 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
486 | u64 blkno) | |
487 | { | |
488 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
489 | } | |
490 | ||
491 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
492 | u32 clusters) | |
493 | { | |
494 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
495 | sb->s_blocksize_bits; | |
496 | ||
497 | return (u64)clusters << c_to_b_bits; | |
498 | } | |
499 | ||
500 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
501 | u64 blocks) | |
502 | { | |
503 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
504 | sb->s_blocksize_bits; | |
505 | ||
506 | return (u32)(blocks >> b_to_c_bits); | |
507 | } | |
508 | ||
509 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
510 | u64 bytes) | |
511 | { | |
512 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
513 | unsigned int clusters; | |
514 | ||
515 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
516 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
517 | clusters = (unsigned int)(bytes >> cl_bits); | |
518 | ||
519 | return clusters; | |
520 | } | |
521 | ||
522 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
523 | u64 bytes) | |
524 | { | |
525 | bytes += sb->s_blocksize - 1; | |
526 | return bytes >> sb->s_blocksize_bits; | |
527 | } | |
528 | ||
529 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
530 | u32 clusters) | |
531 | { | |
532 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
533 | } | |
534 | ||
535 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, | |
536 | u64 bytes) | |
537 | { | |
538 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
539 | unsigned int clusters; | |
540 | ||
541 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
542 | return (u64)clusters << cl_bits; | |
543 | } | |
544 | ||
545 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
546 | u64 bytes) | |
547 | { | |
548 | u64 blocks; | |
549 | ||
550 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
551 | return blocks << sb->s_blocksize_bits; | |
552 | } | |
553 | ||
554 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
555 | { | |
556 | return (unsigned long)((bytes + 511) >> 9); | |
557 | } | |
558 | ||
9517bac6 MF |
559 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
560 | unsigned long pg_index) | |
561 | { | |
562 | u32 clusters = pg_index; | |
563 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
564 | ||
565 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
566 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
567 | else if (PAGE_CACHE_SHIFT < cbits) | |
568 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
569 | ||
570 | return clusters; | |
571 | } | |
572 | ||
573 | /* | |
574 | * Find the 1st page index which covers the given clusters. | |
575 | */ | |
7c08d70c | 576 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
577 | u32 clusters) |
578 | { | |
579 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 580 | pgoff_t index = clusters; |
9517bac6 MF |
581 | |
582 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 583 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 584 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 585 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
586 | } |
587 | ||
588 | return index; | |
589 | } | |
590 | ||
60b11392 MF |
591 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
592 | { | |
593 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
594 | unsigned int pages_per_cluster = 1; | |
595 | ||
596 | if (PAGE_CACHE_SHIFT < cbits) | |
597 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
598 | ||
599 | return pages_per_cluster; | |
600 | } | |
601 | ||
ebcee4b5 MF |
602 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
603 | unsigned int megs) | |
604 | { | |
605 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
606 | ||
607 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
608 | } | |
609 | ||
4d0ddb2c TM |
610 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
611 | { | |
612 | spin_lock(&osb->osb_lock); | |
613 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
614 | spin_unlock(&osb->osb_lock); | |
615 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
616 | } | |
617 | ||
618 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, | |
619 | s16 slot) | |
620 | { | |
621 | spin_lock(&osb->osb_lock); | |
622 | osb->s_inode_steal_slot = slot; | |
623 | spin_unlock(&osb->osb_lock); | |
624 | } | |
625 | ||
626 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
627 | { | |
628 | s16 slot; | |
629 | ||
630 | spin_lock(&osb->osb_lock); | |
631 | slot = osb->s_inode_steal_slot; | |
632 | spin_unlock(&osb->osb_lock); | |
633 | ||
634 | return slot; | |
635 | } | |
636 | ||
ccd979bd MF |
637 | #define ocfs2_set_bit ext2_set_bit |
638 | #define ocfs2_clear_bit ext2_clear_bit | |
639 | #define ocfs2_test_bit ext2_test_bit | |
640 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
70ad1ba7 | 641 | #define ocfs2_find_next_bit ext2_find_next_bit |
ccd979bd MF |
642 | #endif /* OCFS2_H */ |
643 |