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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 | { | |
9c7af40b MF |
174 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
175 | * this mountpoint. */ | |
176 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
177 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
178 | * of bits has been reduced. */ | |
179 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
180 | * disabled. */ | |
ccd979bd MF |
181 | }; |
182 | ||
183 | enum ocfs2_mount_options | |
184 | { | |
185 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
186 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
187 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
188 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
189 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 190 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 191 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
ccd979bd MF |
192 | }; |
193 | ||
194 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
195 | #define OCFS2_OSB_HARD_RO 0x0002 | |
196 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
7f1a37e3 | 197 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
ccd979bd MF |
198 | |
199 | struct ocfs2_journal; | |
d85b20e4 | 200 | struct ocfs2_slot_info; |
553abd04 | 201 | struct ocfs2_recovery_map; |
ccd979bd MF |
202 | struct ocfs2_super |
203 | { | |
ccd979bd MF |
204 | struct task_struct *commit_task; |
205 | struct super_block *sb; | |
206 | struct inode *root_inode; | |
207 | struct inode *sys_root_inode; | |
208 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
209 | ||
210 | struct ocfs2_slot_info *slot_info; | |
211 | ||
539d8264 SM |
212 | u32 *slot_recovery_generations; |
213 | ||
ccd979bd | 214 | spinlock_t node_map_lock; |
ccd979bd | 215 | |
ccd979bd MF |
216 | u64 root_blkno; |
217 | u64 system_dir_blkno; | |
218 | u64 bitmap_blkno; | |
219 | u32 bitmap_cpg; | |
220 | u8 *uuid; | |
221 | char *uuid_str; | |
cf1d6c76 | 222 | u32 uuid_hash; |
ccd979bd MF |
223 | u8 *vol_label; |
224 | u64 first_cluster_group_blkno; | |
225 | u32 fs_generation; | |
226 | ||
227 | u32 s_feature_compat; | |
228 | u32 s_feature_incompat; | |
229 | u32 s_feature_ro_compat; | |
230 | ||
4d0ddb2c TM |
231 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
232 | * Could protect more on osb as it's very short lived. | |
233 | */ | |
ccd979bd MF |
234 | spinlock_t osb_lock; |
235 | u32 s_next_generation; | |
236 | unsigned long osb_flags; | |
4d0ddb2c TM |
237 | s16 s_inode_steal_slot; |
238 | atomic_t s_num_inodes_stolen; | |
ccd979bd MF |
239 | |
240 | unsigned long s_mount_opt; | |
7f1a37e3 | 241 | unsigned int s_atime_quantum; |
ccd979bd | 242 | |
fc881fa0 | 243 | unsigned int max_slots; |
19fdb624 | 244 | unsigned int node_num; |
fc881fa0 JB |
245 | int slot_num; |
246 | int preferred_slot; | |
ccd979bd MF |
247 | int s_sectsize_bits; |
248 | int s_clustersize; | |
249 | int s_clustersize_bits; | |
fdd77704 | 250 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
251 | |
252 | atomic_t vol_state; | |
c74ec2f7 | 253 | struct mutex recovery_lock; |
553abd04 | 254 | struct ocfs2_recovery_map *recovery_map; |
ccd979bd MF |
255 | struct task_struct *recovery_thread_task; |
256 | int disable_recovery; | |
257 | wait_queue_head_t checkpoint_event; | |
258 | atomic_t needs_checkpoint; | |
259 | struct ocfs2_journal *journal; | |
d147b3d6 | 260 | unsigned long osb_commit_interval; |
ccd979bd | 261 | |
9c7af40b MF |
262 | struct delayed_work la_enable_wq; |
263 | ||
264 | /* | |
265 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
266 | * local_alloc_bits. Reads can be done under either lock. | |
267 | */ | |
ebcee4b5 | 268 | unsigned int local_alloc_bits; |
9c7af40b MF |
269 | unsigned int local_alloc_default_bits; |
270 | ||
271 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
272 | * by osb_lock */ | |
273 | ||
ccd979bd | 274 | struct buffer_head *local_alloc_bh; |
9c7af40b | 275 | |
883d4cae | 276 | u64 la_last_gd; |
ccd979bd | 277 | |
9a8ff578 MF |
278 | #ifdef CONFIG_OCFS2_FS_STATS |
279 | struct dentry *local_alloc_debug; | |
280 | char *local_alloc_debug_buf; | |
281 | #endif | |
282 | ||
ccd979bd MF |
283 | /* Next two fields are for local node slot recovery during |
284 | * mount. */ | |
285 | int dirty; | |
286 | struct ocfs2_dinode *local_alloc_copy; | |
287 | ||
288 | struct ocfs2_alloc_stats alloc_stats; | |
289 | char dev_str[20]; /* "major,minor" of the device */ | |
290 | ||
b61817e1 | 291 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 292 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
293 | struct ocfs2_lock_res osb_super_lockres; |
294 | struct ocfs2_lock_res osb_rename_lockres; | |
ccd979bd MF |
295 | struct ocfs2_dlm_debug *osb_dlm_debug; |
296 | ||
297 | struct dentry *osb_debug_root; | |
298 | ||
299 | wait_queue_head_t recovery_event; | |
300 | ||
34d024f8 MF |
301 | spinlock_t dc_task_lock; |
302 | struct task_struct *dc_task; | |
303 | wait_queue_head_t dc_event; | |
304 | unsigned long dc_wake_sequence; | |
305 | unsigned long dc_work_sequence; | |
ccd979bd | 306 | |
7ec373cf MF |
307 | /* |
308 | * Any thread can add locks to the list, but the downconvert | |
309 | * thread is the only one allowed to remove locks. Any change | |
310 | * to this rule requires updating | |
311 | * ocfs2_downconvert_thread_do_work(). | |
312 | */ | |
ccd979bd MF |
313 | struct list_head blocked_lock_list; |
314 | unsigned long blocked_lock_count; | |
315 | ||
ccd979bd MF |
316 | wait_queue_head_t osb_mount_event; |
317 | ||
318 | /* Truncate log info */ | |
319 | struct inode *osb_tl_inode; | |
320 | struct buffer_head *osb_tl_bh; | |
c4028958 | 321 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
322 | |
323 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
324 | unsigned int *osb_orphan_wipes; | |
325 | wait_queue_head_t osb_wipe_event; | |
ccd979bd MF |
326 | }; |
327 | ||
328 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd MF |
329 | |
330 | static inline int ocfs2_should_order_data(struct inode *inode) | |
331 | { | |
332 | if (!S_ISREG(inode->i_mode)) | |
333 | return 0; | |
334 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
335 | return 0; | |
336 | return 1; | |
337 | } | |
338 | ||
dcd0538f MF |
339 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
340 | { | |
341 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
342 | return 1; | |
343 | return 0; | |
344 | } | |
345 | ||
328d5752 MF |
346 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
347 | { | |
348 | /* | |
349 | * Support for sparse files is a pre-requisite | |
350 | */ | |
351 | if (!ocfs2_sparse_alloc(osb)) | |
352 | return 0; | |
353 | ||
354 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
355 | return 1; | |
356 | return 0; | |
357 | } | |
358 | ||
15b1e36b MF |
359 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
360 | { | |
361 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
362 | return 1; | |
363 | return 0; | |
364 | } | |
365 | ||
8154da3d TY |
366 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
367 | { | |
368 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
369 | return 1; | |
370 | return 0; | |
371 | } | |
372 | ||
ccd979bd MF |
373 | /* set / clear functions because cluster events can make these happen |
374 | * in parallel so we want the transitions to be atomic. this also | |
375 | * means that any future flags osb_flags must be protected by spinlock | |
376 | * too! */ | |
377 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
378 | unsigned long flag) | |
379 | { | |
380 | spin_lock(&osb->osb_lock); | |
381 | osb->osb_flags |= flag; | |
382 | spin_unlock(&osb->osb_lock); | |
383 | } | |
384 | ||
385 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
386 | int hard) | |
387 | { | |
388 | spin_lock(&osb->osb_lock); | |
389 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
390 | if (hard) | |
391 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
392 | else | |
393 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
394 | spin_unlock(&osb->osb_lock); | |
395 | } | |
396 | ||
397 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
398 | { | |
399 | int ret; | |
400 | ||
401 | spin_lock(&osb->osb_lock); | |
402 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
403 | spin_unlock(&osb->osb_lock); | |
404 | ||
405 | return ret; | |
406 | } | |
407 | ||
408 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
409 | { | |
410 | int ret; | |
411 | ||
412 | spin_lock(&osb->osb_lock); | |
413 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
414 | spin_unlock(&osb->osb_lock); | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
b61817e1 JB |
419 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
420 | { | |
421 | return (osb->s_feature_incompat & | |
422 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
423 | } | |
424 | ||
c271c5c2 SM |
425 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
426 | { | |
427 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
428 | } | |
429 | ||
386a2ef8 JB |
430 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
431 | { | |
432 | return (osb->s_feature_incompat & | |
433 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
434 | } | |
435 | ||
436 | ||
ccd979bd MF |
437 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
438 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
439 | ||
440 | #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \ | |
441 | typeof(__di) ____di = (__di); \ | |
442 | ocfs2_error((__sb), \ | |
b0697053 | 443 | "Dinode # %llu has bad signature %.*s", \ |
1ca1a111 | 444 | (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \ |
ccd979bd | 445 | (____di)->i_signature); \ |
1ca1a111 | 446 | } while (0) |
ccd979bd MF |
447 | |
448 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ | |
449 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
450 | ||
451 | #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \ | |
452 | typeof(__eb) ____eb = (__eb); \ | |
453 | ocfs2_error((__sb), \ | |
b0697053 | 454 | "Extent Block # %llu has bad signature %.*s", \ |
1ca1a111 | 455 | (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \ |
ccd979bd | 456 | (____eb)->h_signature); \ |
1ca1a111 | 457 | } while (0) |
ccd979bd MF |
458 | |
459 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ | |
460 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
461 | ||
462 | #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \ | |
463 | typeof(__gd) ____gd = (__gd); \ | |
464 | ocfs2_error((__sb), \ | |
b0697053 | 465 | "Group Descriptor # %llu has bad signature %.*s", \ |
1ca1a111 | 466 | (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \ |
ccd979bd | 467 | (____gd)->bg_signature); \ |
1ca1a111 | 468 | } while (0) |
ccd979bd MF |
469 | |
470 | static inline unsigned long ino_from_blkno(struct super_block *sb, | |
471 | u64 blkno) | |
472 | { | |
473 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
474 | } | |
475 | ||
476 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
477 | u32 clusters) | |
478 | { | |
479 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
480 | sb->s_blocksize_bits; | |
481 | ||
482 | return (u64)clusters << c_to_b_bits; | |
483 | } | |
484 | ||
485 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
486 | u64 blocks) | |
487 | { | |
488 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
489 | sb->s_blocksize_bits; | |
490 | ||
491 | return (u32)(blocks >> b_to_c_bits); | |
492 | } | |
493 | ||
494 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
495 | u64 bytes) | |
496 | { | |
497 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
498 | unsigned int clusters; | |
499 | ||
500 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
501 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
502 | clusters = (unsigned int)(bytes >> cl_bits); | |
503 | ||
504 | return clusters; | |
505 | } | |
506 | ||
507 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
508 | u64 bytes) | |
509 | { | |
510 | bytes += sb->s_blocksize - 1; | |
511 | return bytes >> sb->s_blocksize_bits; | |
512 | } | |
513 | ||
514 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
515 | u32 clusters) | |
516 | { | |
517 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
518 | } | |
519 | ||
520 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, | |
521 | u64 bytes) | |
522 | { | |
523 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
524 | unsigned int clusters; | |
525 | ||
526 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
527 | return (u64)clusters << cl_bits; | |
528 | } | |
529 | ||
530 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
531 | u64 bytes) | |
532 | { | |
533 | u64 blocks; | |
534 | ||
535 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
536 | return blocks << sb->s_blocksize_bits; | |
537 | } | |
538 | ||
539 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
540 | { | |
541 | return (unsigned long)((bytes + 511) >> 9); | |
542 | } | |
543 | ||
9517bac6 MF |
544 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
545 | unsigned long pg_index) | |
546 | { | |
547 | u32 clusters = pg_index; | |
548 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
549 | ||
550 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
551 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
552 | else if (PAGE_CACHE_SHIFT < cbits) | |
553 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
554 | ||
555 | return clusters; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Find the 1st page index which covers the given clusters. | |
560 | */ | |
7c08d70c | 561 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
562 | u32 clusters) |
563 | { | |
564 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 565 | pgoff_t index = clusters; |
9517bac6 MF |
566 | |
567 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 568 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 569 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 570 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
571 | } |
572 | ||
573 | return index; | |
574 | } | |
575 | ||
60b11392 MF |
576 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
577 | { | |
578 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
579 | unsigned int pages_per_cluster = 1; | |
580 | ||
581 | if (PAGE_CACHE_SHIFT < cbits) | |
582 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
583 | ||
584 | return pages_per_cluster; | |
585 | } | |
586 | ||
ebcee4b5 MF |
587 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
588 | unsigned int megs) | |
589 | { | |
590 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
591 | ||
592 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
593 | } | |
594 | ||
4d0ddb2c TM |
595 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
596 | { | |
597 | spin_lock(&osb->osb_lock); | |
598 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
599 | spin_unlock(&osb->osb_lock); | |
600 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
601 | } | |
602 | ||
603 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, | |
604 | s16 slot) | |
605 | { | |
606 | spin_lock(&osb->osb_lock); | |
607 | osb->s_inode_steal_slot = slot; | |
608 | spin_unlock(&osb->osb_lock); | |
609 | } | |
610 | ||
611 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
612 | { | |
613 | s16 slot; | |
614 | ||
615 | spin_lock(&osb->osb_lock); | |
616 | slot = osb->s_inode_steal_slot; | |
617 | spin_unlock(&osb->osb_lock); | |
618 | ||
619 | return slot; | |
620 | } | |
621 | ||
ccd979bd MF |
622 | #define ocfs2_set_bit ext2_set_bit |
623 | #define ocfs2_clear_bit ext2_clear_bit | |
624 | #define ocfs2_test_bit ext2_test_bit | |
625 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
626 | #endif /* OCFS2_H */ | |
627 |