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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/llist.h>
34#include <linux/rbtree.h>
35#include <linux/workqueue.h>
36#include <linux/kref.h>
37#include <linux/mutex.h>
38#include <linux/lockdep.h>
39#include <linux/jbd2.h>
40
41
42#include "stackglue.h"
43
44#include "ocfs2_fs.h"
45#include "ocfs2_lockid.h"
46#include "ocfs2_ioctl.h"
47
48
49#include "blockcheck.h"
50
51#include "reservations.h"
52
53
54
55
56
57
58
59
60#define OCFS2_CACHE_INFO_MAX_ARRAY 2
61
62
63
64enum ocfs2_caching_info_flags {
65
66 OCFS2_CACHE_FL_INLINE = 1<<1,
67};
68
69struct ocfs2_caching_operations;
70struct ocfs2_caching_info {
71
72
73
74
75
76 const struct ocfs2_caching_operations *ci_ops;
77
78
79
80 unsigned long ci_created_trans;
81
82 unsigned long ci_last_trans;
83
84
85 unsigned int ci_flags;
86 unsigned int ci_num_cached;
87 union {
88 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
89 struct rb_root ci_tree;
90 } ci_cache;
91};
92
93
94
95
96struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
97
98
99
100#define OCFS2_NODE_MAP_MAX_NODES 256
101struct ocfs2_node_map {
102 u16 num_nodes;
103 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
104};
105
106enum ocfs2_ast_action {
107 OCFS2_AST_INVALID = 0,
108 OCFS2_AST_ATTACH,
109 OCFS2_AST_CONVERT,
110 OCFS2_AST_DOWNCONVERT,
111};
112
113
114enum ocfs2_unlock_action {
115 OCFS2_UNLOCK_INVALID = 0,
116 OCFS2_UNLOCK_CANCEL_CONVERT,
117 OCFS2_UNLOCK_DROP_LOCK,
118};
119
120
121#define OCFS2_LOCK_ATTACHED (0x00000001)
122
123#define OCFS2_LOCK_BUSY (0x00000002)
124
125#define OCFS2_LOCK_BLOCKED (0x00000004)
126
127#define OCFS2_LOCK_LOCAL (0x00000008)
128#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
129#define OCFS2_LOCK_REFRESHING (0x00000020)
130#define OCFS2_LOCK_INITIALIZED (0x00000040)
131
132#define OCFS2_LOCK_FREEING (0x00000080)
133
134
135
136
137#define OCFS2_LOCK_QUEUED (0x00000100)
138#define OCFS2_LOCK_NOCACHE (0x00000200)
139#define OCFS2_LOCK_PENDING (0x00000400)
140
141
142#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800)
143
144
145
146
147struct ocfs2_lock_res_ops;
148
149typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
150
151#ifdef CONFIG_OCFS2_FS_STATS
152struct ocfs2_lock_stats {
153 u64 ls_total;
154 u32 ls_gets;
155 u32 ls_fail;
156
157
158 u32 ls_max;
159};
160#endif
161
162struct ocfs2_lock_res {
163 void *l_priv;
164 struct ocfs2_lock_res_ops *l_ops;
165
166
167 struct list_head l_blocked_list;
168 struct list_head l_mask_waiters;
169
170 unsigned long l_flags;
171 char l_name[OCFS2_LOCK_ID_MAX_LEN];
172 unsigned int l_ro_holders;
173 unsigned int l_ex_holders;
174 signed char l_level;
175 signed char l_requested;
176 signed char l_blocking;
177
178
179 unsigned char l_type;
180
181
182
183 unsigned char l_action;
184
185 unsigned char l_unlock_action;
186 unsigned int l_pending_gen;
187
188 spinlock_t l_lock;
189
190 struct ocfs2_dlm_lksb l_lksb;
191
192 wait_queue_head_t l_event;
193
194 struct list_head l_debug_list;
195
196#ifdef CONFIG_OCFS2_FS_STATS
197 struct ocfs2_lock_stats l_lock_prmode;
198 u32 l_lock_refresh;
199 struct ocfs2_lock_stats l_lock_exmode;
200#endif
201#ifdef CONFIG_DEBUG_LOCK_ALLOC
202 struct lockdep_map l_lockdep_map;
203#endif
204};
205
206enum ocfs2_orphan_scan_state {
207 ORPHAN_SCAN_ACTIVE,
208 ORPHAN_SCAN_INACTIVE
209};
210
211struct ocfs2_orphan_scan {
212 struct mutex os_lock;
213 struct ocfs2_super *os_osb;
214 struct ocfs2_lock_res os_lockres;
215 struct delayed_work os_orphan_scan_work;
216 struct timespec os_scantime;
217 u32 os_count;
218 u32 os_seqno;
219 atomic_t os_state;
220};
221
222struct ocfs2_dlm_debug {
223 struct kref d_refcnt;
224 struct dentry *d_locking_state;
225 struct list_head d_lockres_tracking;
226};
227
228enum ocfs2_vol_state
229{
230 VOLUME_INIT = 0,
231 VOLUME_MOUNTED,
232 VOLUME_MOUNTED_QUOTAS,
233 VOLUME_DISMOUNTED,
234 VOLUME_DISABLED
235};
236
237struct ocfs2_alloc_stats
238{
239 atomic_t moves;
240 atomic_t local_data;
241 atomic_t bitmap_data;
242 atomic_t bg_allocs;
243 atomic_t bg_extends;
244};
245
246enum ocfs2_local_alloc_state
247{
248 OCFS2_LA_UNUSED = 0,
249
250 OCFS2_LA_ENABLED,
251 OCFS2_LA_THROTTLED,
252
253 OCFS2_LA_DISABLED
254
255};
256
257enum ocfs2_mount_options
258{
259 OCFS2_MOUNT_HB_LOCAL = 1 << 0,
260 OCFS2_MOUNT_BARRIER = 1 << 1,
261 OCFS2_MOUNT_NOINTR = 1 << 2,
262 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3,
263 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4,
264 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5,
265 OCFS2_MOUNT_NOUSERXATTR = 1 << 6,
266 OCFS2_MOUNT_INODE64 = 1 << 7,
267 OCFS2_MOUNT_POSIX_ACL = 1 << 8,
268 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9,
269
270 OCFS2_MOUNT_USRQUOTA = 1 << 10,
271 OCFS2_MOUNT_GRPQUOTA = 1 << 11,
272 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12,
273
274 OCFS2_MOUNT_HB_NONE = 1 << 13,
275 OCFS2_MOUNT_HB_GLOBAL = 1 << 14,
276};
277
278#define OCFS2_OSB_SOFT_RO 0x0001
279#define OCFS2_OSB_HARD_RO 0x0002
280#define OCFS2_OSB_ERROR_FS 0x0004
281#define OCFS2_DEFAULT_ATIME_QUANTUM 60
282
283struct ocfs2_journal;
284struct ocfs2_slot_info;
285struct ocfs2_recovery_map;
286struct ocfs2_replay_map;
287struct ocfs2_quota_recovery;
288struct ocfs2_super
289{
290 struct task_struct *commit_task;
291 struct super_block *sb;
292 struct inode *root_inode;
293 struct inode *sys_root_inode;
294 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
295 struct inode **local_system_inodes;
296
297 struct ocfs2_slot_info *slot_info;
298
299 u32 *slot_recovery_generations;
300
301 spinlock_t node_map_lock;
302
303 u64 root_blkno;
304 u64 system_dir_blkno;
305 u64 bitmap_blkno;
306 u32 bitmap_cpg;
307 u8 *uuid;
308 char *uuid_str;
309 u32 uuid_hash;
310 u8 *vol_label;
311 u64 first_cluster_group_blkno;
312 u32 fs_generation;
313
314 u32 s_feature_compat;
315 u32 s_feature_incompat;
316 u32 s_feature_ro_compat;
317
318
319
320
321 spinlock_t osb_lock;
322 u32 s_next_generation;
323 unsigned long osb_flags;
324 s16 s_inode_steal_slot;
325 s16 s_meta_steal_slot;
326 atomic_t s_num_inodes_stolen;
327 atomic_t s_num_meta_stolen;
328
329 unsigned long s_mount_opt;
330 unsigned int s_atime_quantum;
331
332 unsigned int max_slots;
333 unsigned int node_num;
334 int slot_num;
335 int preferred_slot;
336 int s_sectsize_bits;
337 int s_clustersize;
338 int s_clustersize_bits;
339 unsigned int s_xattr_inline_size;
340
341 atomic_t vol_state;
342 struct mutex recovery_lock;
343 struct ocfs2_recovery_map *recovery_map;
344 struct ocfs2_replay_map *replay_map;
345 struct task_struct *recovery_thread_task;
346 int disable_recovery;
347 wait_queue_head_t checkpoint_event;
348 struct ocfs2_journal *journal;
349 unsigned long osb_commit_interval;
350
351 struct delayed_work la_enable_wq;
352
353
354
355
356
357 unsigned int local_alloc_bits;
358 unsigned int local_alloc_default_bits;
359
360
361 unsigned int osb_clusters_at_boot;
362
363 enum ocfs2_local_alloc_state local_alloc_state;
364
365
366 struct buffer_head *local_alloc_bh;
367
368 u64 la_last_gd;
369
370 struct ocfs2_reservation_map osb_la_resmap;
371
372 unsigned int osb_resv_level;
373 unsigned int osb_dir_resv_level;
374
375
376
377 int dirty;
378 struct ocfs2_dinode *local_alloc_copy;
379 struct ocfs2_quota_recovery *quota_rec;
380
381 struct ocfs2_blockcheck_stats osb_ecc_stats;
382 struct ocfs2_alloc_stats alloc_stats;
383 char dev_str[20];
384
385 u8 osb_stackflags;
386
387 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
388 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
389 struct ocfs2_cluster_connection *cconn;
390 struct ocfs2_lock_res osb_super_lockres;
391 struct ocfs2_lock_res osb_rename_lockres;
392 struct ocfs2_lock_res osb_nfs_sync_lockres;
393 struct ocfs2_dlm_debug *osb_dlm_debug;
394
395 struct dentry *osb_debug_root;
396 struct dentry *osb_ctxt;
397
398 wait_queue_head_t recovery_event;
399
400 spinlock_t dc_task_lock;
401 struct task_struct *dc_task;
402 wait_queue_head_t dc_event;
403 unsigned long dc_wake_sequence;
404 unsigned long dc_work_sequence;
405
406
407
408
409
410
411
412 struct list_head blocked_lock_list;
413 unsigned long blocked_lock_count;
414
415
416 struct llist_head dquot_drop_list;
417 struct work_struct dquot_drop_work;
418
419 wait_queue_head_t osb_mount_event;
420
421
422 struct inode *osb_tl_inode;
423 struct buffer_head *osb_tl_bh;
424 struct delayed_work osb_truncate_log_wq;
425 atomic_t osb_tl_disable;
426
427
428
429
430 unsigned int truncated_clusters;
431
432 struct ocfs2_node_map osb_recovering_orphan_dirs;
433 unsigned int *osb_orphan_wipes;
434 wait_queue_head_t osb_wipe_event;
435
436 struct ocfs2_orphan_scan osb_orphan_scan;
437
438
439 spinlock_t osb_xattr_lock;
440
441 unsigned int osb_dx_mask;
442 u32 osb_dx_seed[4];
443
444
445 u64 osb_inode_alloc_group;
446
447
448 struct rb_root osb_rf_lock_tree;
449 struct ocfs2_refcount_tree *osb_ref_tree_lru;
450
451 struct mutex system_file_mutex;
452};
453
454#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
455
456
457typedef int (*ocfs2_journal_access_func)(handle_t *handle,
458 struct ocfs2_caching_info *ci,
459 struct buffer_head *bh, int type);
460
461static inline int ocfs2_should_order_data(struct inode *inode)
462{
463 if (!S_ISREG(inode->i_mode))
464 return 0;
465 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
466 return 0;
467 return 1;
468}
469
470static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
471{
472 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
473 return 1;
474 return 0;
475}
476
477static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
478{
479
480
481
482 if (!ocfs2_sparse_alloc(osb))
483 return 0;
484
485 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
486 return 1;
487 return 0;
488}
489
490static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
491{
492 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
493 return 1;
494 return 0;
495}
496
497static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
498{
499 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
500 return 1;
501 return 0;
502}
503
504static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
505{
506 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
507 return 1;
508 return 0;
509}
510
511static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
512{
513 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
514 return 1;
515 return 0;
516}
517
518static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
519{
520 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
521 return 1;
522 return 0;
523}
524
525static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
526{
527 if (ocfs2_supports_indexed_dirs(osb))
528 return OCFS2_DX_LINK_MAX;
529 return OCFS2_LINK_MAX;
530}
531
532static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
533{
534 u32 nlink = le16_to_cpu(di->i_links_count);
535 u32 hi = le16_to_cpu(di->i_links_count_hi);
536
537 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
538 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
539
540 return nlink;
541}
542
543static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
544{
545 u16 lo, hi;
546
547 lo = nlink;
548 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
549
550 di->i_links_count = cpu_to_le16(lo);
551 di->i_links_count_hi = cpu_to_le16(hi);
552}
553
554static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
555{
556 u32 links = ocfs2_read_links_count(di);
557
558 links += n;
559
560 ocfs2_set_links_count(di, links);
561}
562
563static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
564{
565 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
566 return 1;
567 return 0;
568}
569
570
571
572
573
574static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
575 unsigned long flag)
576{
577 spin_lock(&osb->osb_lock);
578 osb->osb_flags |= flag;
579 spin_unlock(&osb->osb_lock);
580}
581
582static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
583 int hard)
584{
585 spin_lock(&osb->osb_lock);
586 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
587 if (hard)
588 osb->osb_flags |= OCFS2_OSB_HARD_RO;
589 else
590 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
591 spin_unlock(&osb->osb_lock);
592}
593
594static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
595{
596 int ret;
597
598 spin_lock(&osb->osb_lock);
599 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
600 spin_unlock(&osb->osb_lock);
601
602 return ret;
603}
604
605static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
606{
607 int ret;
608
609 spin_lock(&osb->osb_lock);
610 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
611 spin_unlock(&osb->osb_lock);
612
613 return ret;
614}
615
616static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
617{
618 return (osb->s_feature_incompat &
619 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
620 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
621}
622
623static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
624{
625 if (ocfs2_clusterinfo_valid(osb) &&
626 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
627 OCFS2_STACK_LABEL_LEN))
628 return 1;
629 return 0;
630}
631
632static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
633{
634 if (ocfs2_clusterinfo_valid(osb) &&
635 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
636 OCFS2_STACK_LABEL_LEN))
637 return 1;
638 return 0;
639}
640
641static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
642{
643 return ocfs2_o2cb_stack(osb) &&
644 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
645}
646
647static inline int ocfs2_mount_local(struct ocfs2_super *osb)
648{
649 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
650}
651
652static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
653{
654 return (osb->s_feature_incompat &
655 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
656}
657
658
659#define OCFS2_IS_VALID_DINODE(ptr) \
660 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
661
662#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
663 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
664
665#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
666 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
667
668
669#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
670 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
671
672#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
673 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
674
675#define OCFS2_IS_VALID_DX_ROOT(ptr) \
676 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
677
678#define OCFS2_IS_VALID_DX_LEAF(ptr) \
679 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
680
681#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
682 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
683
684static inline unsigned long ino_from_blkno(struct super_block *sb,
685 u64 blkno)
686{
687 return (unsigned long)(blkno & (u64)ULONG_MAX);
688}
689
690static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
691 u32 clusters)
692{
693 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
694 sb->s_blocksize_bits;
695
696 return (u64)clusters << c_to_b_bits;
697}
698
699static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
700 u64 blocks)
701{
702 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
703 sb->s_blocksize_bits;
704
705 return (u32)(blocks >> b_to_c_bits);
706}
707
708static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
709 u64 bytes)
710{
711 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
712 unsigned int clusters;
713
714 bytes += OCFS2_SB(sb)->s_clustersize - 1;
715
716 clusters = (unsigned int)(bytes >> cl_bits);
717
718 return clusters;
719}
720
721static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
722 u64 bytes)
723{
724 bytes += sb->s_blocksize - 1;
725 return bytes >> sb->s_blocksize_bits;
726}
727
728static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
729 u32 clusters)
730{
731 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
732}
733
734static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
735 u64 blocks)
736{
737 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
738 unsigned int clusters;
739
740 clusters = ocfs2_blocks_to_clusters(sb, blocks);
741 return (u64)clusters << bits;
742}
743
744static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
745 u64 bytes)
746{
747 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
748 unsigned int clusters;
749
750 clusters = ocfs2_clusters_for_bytes(sb, bytes);
751 return (u64)clusters << cl_bits;
752}
753
754static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
755 u64 bytes)
756{
757 u64 blocks;
758
759 blocks = ocfs2_blocks_for_bytes(sb, bytes);
760 return blocks << sb->s_blocksize_bits;
761}
762
763static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
764{
765 return (unsigned long)((bytes + 511) >> 9);
766}
767
768static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
769 unsigned long pg_index)
770{
771 u32 clusters = pg_index;
772 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
773
774 if (unlikely(PAGE_CACHE_SHIFT > cbits))
775 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
776 else if (PAGE_CACHE_SHIFT < cbits)
777 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
778
779 return clusters;
780}
781
782
783
784
785static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
786 u32 clusters)
787{
788 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
789 pgoff_t index = clusters;
790
791 if (PAGE_CACHE_SHIFT > cbits) {
792 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
793 } else if (PAGE_CACHE_SHIFT < cbits) {
794 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
795 }
796
797 return index;
798}
799
800static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
801{
802 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
803 unsigned int pages_per_cluster = 1;
804
805 if (PAGE_CACHE_SHIFT < cbits)
806 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
807
808 return pages_per_cluster;
809}
810
811static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
812 unsigned int megs)
813{
814 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
815
816 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
817}
818
819static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
820 unsigned int clusters)
821{
822 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
823}
824
825static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
826{
827 __set_bit_le(bit, bitmap);
828}
829#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
830
831static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
832{
833 __clear_bit_le(bit, bitmap);
834}
835#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
836
837#define ocfs2_test_bit test_bit_le
838#define ocfs2_find_next_zero_bit find_next_zero_bit_le
839#define ocfs2_find_next_bit find_next_bit_le
840
841static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
842{
843#if BITS_PER_LONG == 64
844 *bit += ((unsigned long) addr & 7UL) << 3;
845 addr = (void *) ((unsigned long) addr & ~7UL);
846#elif BITS_PER_LONG == 32
847 *bit += ((unsigned long) addr & 3UL) << 3;
848 addr = (void *) ((unsigned long) addr & ~3UL);
849#else
850#error "how many bits you are?!"
851#endif
852 return addr;
853}
854
855static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
856{
857 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
858 ocfs2_set_bit(bit, bitmap);
859}
860
861static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
862{
863 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
864 ocfs2_clear_bit(bit, bitmap);
865}
866
867static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
868{
869 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
870 return ocfs2_test_bit(bit, bitmap);
871}
872
873static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
874 int start)
875{
876 int fix = 0, ret, tmpmax;
877 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
878 tmpmax = max + fix;
879 start += fix;
880
881 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
882 if (ret > max)
883 return max;
884 return ret;
885}
886
887#endif
888
889