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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
147#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000)
148
149
150
151
152
153struct ocfs2_lock_res_ops;
154
155typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
156
157#ifdef CONFIG_OCFS2_FS_STATS
158struct ocfs2_lock_stats {
159 u64 ls_total;
160 u32 ls_gets;
161 u32 ls_fail;
162
163
164 u32 ls_max;
165};
166#endif
167
168struct ocfs2_lock_res {
169 void *l_priv;
170 struct ocfs2_lock_res_ops *l_ops;
171
172
173 struct list_head l_blocked_list;
174 struct list_head l_mask_waiters;
175 struct list_head l_holders;
176
177 unsigned long l_flags;
178 char l_name[OCFS2_LOCK_ID_MAX_LEN];
179 unsigned int l_ro_holders;
180 unsigned int l_ex_holders;
181 signed char l_level;
182 signed char l_requested;
183 signed char l_blocking;
184
185
186 unsigned char l_type;
187
188
189
190 unsigned char l_action;
191
192 unsigned char l_unlock_action;
193 unsigned int l_pending_gen;
194
195 spinlock_t l_lock;
196
197 struct ocfs2_dlm_lksb l_lksb;
198
199 wait_queue_head_t l_event;
200
201 struct list_head l_debug_list;
202
203#ifdef CONFIG_OCFS2_FS_STATS
204 struct ocfs2_lock_stats l_lock_prmode;
205 u32 l_lock_refresh;
206 struct ocfs2_lock_stats l_lock_exmode;
207#endif
208#ifdef CONFIG_DEBUG_LOCK_ALLOC
209 struct lockdep_map l_lockdep_map;
210#endif
211};
212
213enum ocfs2_orphan_reco_type {
214 ORPHAN_NO_NEED_TRUNCATE = 0,
215 ORPHAN_NEED_TRUNCATE,
216};
217
218enum ocfs2_orphan_scan_state {
219 ORPHAN_SCAN_ACTIVE,
220 ORPHAN_SCAN_INACTIVE
221};
222
223struct ocfs2_orphan_scan {
224 struct mutex os_lock;
225 struct ocfs2_super *os_osb;
226 struct ocfs2_lock_res os_lockres;
227 struct delayed_work os_orphan_scan_work;
228 time64_t os_scantime;
229 u32 os_count;
230 u32 os_seqno;
231 atomic_t os_state;
232};
233
234struct ocfs2_dlm_debug {
235 struct kref d_refcnt;
236 struct dentry *d_locking_state;
237 struct list_head d_lockres_tracking;
238};
239
240enum ocfs2_vol_state
241{
242 VOLUME_INIT = 0,
243 VOLUME_MOUNTED,
244 VOLUME_MOUNTED_QUOTAS,
245 VOLUME_DISMOUNTED,
246 VOLUME_DISABLED
247};
248
249struct ocfs2_alloc_stats
250{
251 atomic_t moves;
252 atomic_t local_data;
253 atomic_t bitmap_data;
254 atomic_t bg_allocs;
255 atomic_t bg_extends;
256};
257
258enum ocfs2_local_alloc_state
259{
260 OCFS2_LA_UNUSED = 0,
261
262 OCFS2_LA_ENABLED,
263 OCFS2_LA_THROTTLED,
264
265 OCFS2_LA_DISABLED
266
267};
268
269enum ocfs2_mount_options
270{
271 OCFS2_MOUNT_HB_LOCAL = 1 << 0,
272 OCFS2_MOUNT_BARRIER = 1 << 1,
273 OCFS2_MOUNT_NOINTR = 1 << 2,
274 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3,
275 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4,
276 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5,
277 OCFS2_MOUNT_NOUSERXATTR = 1 << 6,
278 OCFS2_MOUNT_INODE64 = 1 << 7,
279 OCFS2_MOUNT_POSIX_ACL = 1 << 8,
280 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9,
281
282 OCFS2_MOUNT_USRQUOTA = 1 << 10,
283 OCFS2_MOUNT_GRPQUOTA = 1 << 11,
284 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12,
285
286 OCFS2_MOUNT_HB_NONE = 1 << 13,
287 OCFS2_MOUNT_HB_GLOBAL = 1 << 14,
288
289 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15,
290 OCFS2_MOUNT_ERRORS_CONT = 1 << 16,
291 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17,
292};
293
294#define OCFS2_OSB_SOFT_RO 0x0001
295#define OCFS2_OSB_HARD_RO 0x0002
296#define OCFS2_OSB_ERROR_FS 0x0004
297#define OCFS2_DEFAULT_ATIME_QUANTUM 60
298
299struct ocfs2_journal;
300struct ocfs2_slot_info;
301struct ocfs2_recovery_map;
302struct ocfs2_replay_map;
303struct ocfs2_quota_recovery;
304struct ocfs2_super
305{
306 struct task_struct *commit_task;
307 struct super_block *sb;
308 struct inode *root_inode;
309 struct inode *sys_root_inode;
310 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
311 struct inode **local_system_inodes;
312
313 struct ocfs2_slot_info *slot_info;
314
315 u32 *slot_recovery_generations;
316
317 spinlock_t node_map_lock;
318
319 u64 root_blkno;
320 u64 system_dir_blkno;
321 u64 bitmap_blkno;
322 u32 bitmap_cpg;
323 char *uuid_str;
324 u32 uuid_hash;
325 u8 *vol_label;
326 u64 first_cluster_group_blkno;
327 u32 fs_generation;
328
329 u32 s_feature_compat;
330 u32 s_feature_incompat;
331 u32 s_feature_ro_compat;
332
333
334
335
336 spinlock_t osb_lock;
337 u32 s_next_generation;
338 unsigned long osb_flags;
339 s16 s_inode_steal_slot;
340 s16 s_meta_steal_slot;
341 atomic_t s_num_inodes_stolen;
342 atomic_t s_num_meta_stolen;
343
344 unsigned long s_mount_opt;
345 unsigned int s_atime_quantum;
346
347 unsigned int max_slots;
348 unsigned int node_num;
349 int slot_num;
350 int preferred_slot;
351 int s_sectsize_bits;
352 int s_clustersize;
353 int s_clustersize_bits;
354 unsigned int s_xattr_inline_size;
355
356 atomic_t vol_state;
357 struct mutex recovery_lock;
358 struct ocfs2_recovery_map *recovery_map;
359 struct ocfs2_replay_map *replay_map;
360 struct task_struct *recovery_thread_task;
361 int disable_recovery;
362 wait_queue_head_t checkpoint_event;
363 struct ocfs2_journal *journal;
364 unsigned long osb_commit_interval;
365
366 struct delayed_work la_enable_wq;
367
368
369
370
371
372 unsigned int local_alloc_bits;
373 unsigned int local_alloc_default_bits;
374
375
376 unsigned int osb_clusters_at_boot;
377
378 enum ocfs2_local_alloc_state local_alloc_state;
379
380
381 struct buffer_head *local_alloc_bh;
382
383 u64 la_last_gd;
384
385 struct ocfs2_reservation_map osb_la_resmap;
386
387 unsigned int osb_resv_level;
388 unsigned int osb_dir_resv_level;
389
390
391
392 struct ocfs2_dinode *local_alloc_copy;
393 struct ocfs2_quota_recovery *quota_rec;
394
395 struct ocfs2_blockcheck_stats osb_ecc_stats;
396 struct ocfs2_alloc_stats alloc_stats;
397 char dev_str[20];
398
399 u8 osb_stackflags;
400
401 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
402 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
403 struct ocfs2_cluster_connection *cconn;
404 struct ocfs2_lock_res osb_super_lockres;
405 struct ocfs2_lock_res osb_rename_lockres;
406 struct ocfs2_lock_res osb_nfs_sync_lockres;
407 struct ocfs2_dlm_debug *osb_dlm_debug;
408
409 struct dentry *osb_debug_root;
410 struct dentry *osb_ctxt;
411
412 wait_queue_head_t recovery_event;
413
414 spinlock_t dc_task_lock;
415 struct task_struct *dc_task;
416 wait_queue_head_t dc_event;
417 unsigned long dc_wake_sequence;
418 unsigned long dc_work_sequence;
419
420
421
422
423
424
425
426 struct list_head blocked_lock_list;
427 unsigned long blocked_lock_count;
428
429
430 struct llist_head dquot_drop_list;
431 struct work_struct dquot_drop_work;
432
433 wait_queue_head_t osb_mount_event;
434
435
436 struct inode *osb_tl_inode;
437 struct buffer_head *osb_tl_bh;
438 struct delayed_work osb_truncate_log_wq;
439 atomic_t osb_tl_disable;
440
441
442
443
444 unsigned int truncated_clusters;
445
446 struct ocfs2_node_map osb_recovering_orphan_dirs;
447 unsigned int *osb_orphan_wipes;
448 wait_queue_head_t osb_wipe_event;
449
450 struct ocfs2_orphan_scan osb_orphan_scan;
451
452
453 spinlock_t osb_xattr_lock;
454
455 unsigned int osb_dx_mask;
456 u32 osb_dx_seed[4];
457
458
459 u64 osb_inode_alloc_group;
460
461
462 struct rb_root osb_rf_lock_tree;
463 struct ocfs2_refcount_tree *osb_ref_tree_lru;
464
465 struct mutex system_file_mutex;
466
467
468
469
470
471
472
473 struct workqueue_struct *ocfs2_wq;
474};
475
476#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
477
478
479typedef int (*ocfs2_journal_access_func)(handle_t *handle,
480 struct ocfs2_caching_info *ci,
481 struct buffer_head *bh, int type);
482
483static inline int ocfs2_should_order_data(struct inode *inode)
484{
485 if (!S_ISREG(inode->i_mode))
486 return 0;
487 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
488 return 0;
489 return 1;
490}
491
492static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
493{
494 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
495 return 1;
496 return 0;
497}
498
499static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
500{
501
502
503
504 if (!ocfs2_sparse_alloc(osb))
505 return 0;
506
507 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
508 return 1;
509 return 0;
510}
511
512static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
513{
514 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
515 return 1;
516 return 0;
517}
518
519
520static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
521{
522 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
523 return 1;
524 return 0;
525}
526
527static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
528{
529 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
530 return 1;
531 return 0;
532}
533
534static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
535{
536 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
537 return 1;
538 return 0;
539}
540
541static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
542{
543 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
544 return 1;
545 return 0;
546}
547
548static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
549{
550 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
551 return 1;
552 return 0;
553}
554
555static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
556{
557 if (ocfs2_supports_indexed_dirs(osb))
558 return OCFS2_DX_LINK_MAX;
559 return OCFS2_LINK_MAX;
560}
561
562static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
563{
564 u32 nlink = le16_to_cpu(di->i_links_count);
565 u32 hi = le16_to_cpu(di->i_links_count_hi);
566
567 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
568 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
569
570 return nlink;
571}
572
573static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
574{
575 u16 lo, hi;
576
577 lo = nlink;
578 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
579
580 di->i_links_count = cpu_to_le16(lo);
581 di->i_links_count_hi = cpu_to_le16(hi);
582}
583
584static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
585{
586 u32 links = ocfs2_read_links_count(di);
587
588 links += n;
589
590 ocfs2_set_links_count(di, links);
591}
592
593static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
594{
595 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
596 return 1;
597 return 0;
598}
599
600
601
602
603
604static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
605 unsigned long flag)
606{
607 spin_lock(&osb->osb_lock);
608 osb->osb_flags |= flag;
609 spin_unlock(&osb->osb_lock);
610}
611
612static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
613 int hard)
614{
615 spin_lock(&osb->osb_lock);
616 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
617 if (hard)
618 osb->osb_flags |= OCFS2_OSB_HARD_RO;
619 else
620 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
621 spin_unlock(&osb->osb_lock);
622}
623
624static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
625{
626 int ret;
627
628 spin_lock(&osb->osb_lock);
629 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
630 spin_unlock(&osb->osb_lock);
631
632 return ret;
633}
634
635static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
636{
637 int ret;
638
639 spin_lock(&osb->osb_lock);
640 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
641 spin_unlock(&osb->osb_lock);
642
643 return ret;
644}
645
646static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
647{
648 return (osb->s_feature_incompat &
649 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
650 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
651}
652
653static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
654{
655 if (ocfs2_clusterinfo_valid(osb) &&
656 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
657 OCFS2_STACK_LABEL_LEN))
658 return 1;
659 return 0;
660}
661
662static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
663{
664 if (ocfs2_clusterinfo_valid(osb) &&
665 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
666 OCFS2_STACK_LABEL_LEN))
667 return 1;
668 return 0;
669}
670
671static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
672{
673 return ocfs2_o2cb_stack(osb) &&
674 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
675}
676
677static inline int ocfs2_mount_local(struct ocfs2_super *osb)
678{
679 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
680}
681
682static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
683{
684 return (osb->s_feature_incompat &
685 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
686}
687
688
689#define OCFS2_IS_VALID_DINODE(ptr) \
690 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
691
692#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
693 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
694
695#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
696 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
697
698
699#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
700 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
701
702#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
703 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
704
705#define OCFS2_IS_VALID_DX_ROOT(ptr) \
706 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
707
708#define OCFS2_IS_VALID_DX_LEAF(ptr) \
709 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
710
711#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
712 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
713
714static inline unsigned long ino_from_blkno(struct super_block *sb,
715 u64 blkno)
716{
717 return (unsigned long)(blkno & (u64)ULONG_MAX);
718}
719
720static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
721 u32 clusters)
722{
723 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
724 sb->s_blocksize_bits;
725
726 return (u64)clusters << c_to_b_bits;
727}
728
729static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
730 u64 blocks)
731{
732 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
733 sb->s_blocksize_bits;
734
735 blocks += (1 << b_to_c_bits) - 1;
736 return (u32)(blocks >> b_to_c_bits);
737}
738
739static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
740 u64 blocks)
741{
742 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
743 sb->s_blocksize_bits;
744
745 return (u32)(blocks >> b_to_c_bits);
746}
747
748static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
749 u64 bytes)
750{
751 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
752 unsigned int clusters;
753
754 bytes += OCFS2_SB(sb)->s_clustersize - 1;
755
756 clusters = (unsigned int)(bytes >> cl_bits);
757
758 return clusters;
759}
760
761static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
762 u64 bytes)
763{
764 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
765 unsigned int clusters;
766
767 clusters = (unsigned int)(bytes >> cl_bits);
768 return clusters;
769}
770
771static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
772 u64 bytes)
773{
774 bytes += sb->s_blocksize - 1;
775 return bytes >> sb->s_blocksize_bits;
776}
777
778static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
779 u32 clusters)
780{
781 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
782}
783
784static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
785 u64 blocks)
786{
787 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
788 unsigned int clusters;
789
790 clusters = ocfs2_blocks_to_clusters(sb, blocks);
791 return (u64)clusters << bits;
792}
793
794static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
795 u64 bytes)
796{
797 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
798 unsigned int clusters;
799
800 clusters = ocfs2_clusters_for_bytes(sb, bytes);
801 return (u64)clusters << cl_bits;
802}
803
804static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
805 u64 bytes)
806{
807 u64 blocks;
808
809 blocks = ocfs2_blocks_for_bytes(sb, bytes);
810 return blocks << sb->s_blocksize_bits;
811}
812
813static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
814{
815 return (unsigned long)((bytes + 511) >> 9);
816}
817
818static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
819 unsigned long pg_index)
820{
821 u32 clusters = pg_index;
822 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
823
824 if (unlikely(PAGE_SHIFT > cbits))
825 clusters = pg_index << (PAGE_SHIFT - cbits);
826 else if (PAGE_SHIFT < cbits)
827 clusters = pg_index >> (cbits - PAGE_SHIFT);
828
829 return clusters;
830}
831
832
833
834
835static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
836 u32 clusters)
837{
838 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
839 pgoff_t index = clusters;
840
841 if (PAGE_SHIFT > cbits) {
842 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
843 } else if (PAGE_SHIFT < cbits) {
844 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
845 }
846
847 return index;
848}
849
850static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
851{
852 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
853 unsigned int pages_per_cluster = 1;
854
855 if (PAGE_SHIFT < cbits)
856 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
857
858 return pages_per_cluster;
859}
860
861static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
862 unsigned int megs)
863{
864 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
865
866 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
867}
868
869static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
870 unsigned int clusters)
871{
872 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
873}
874
875static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
876{
877 __set_bit_le(bit, bitmap);
878}
879#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
880
881static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
882{
883 __clear_bit_le(bit, bitmap);
884}
885#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
886
887#define ocfs2_test_bit test_bit_le
888#define ocfs2_find_next_zero_bit find_next_zero_bit_le
889#define ocfs2_find_next_bit find_next_bit_le
890
891static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
892{
893#if BITS_PER_LONG == 64
894 *bit += ((unsigned long) addr & 7UL) << 3;
895 addr = (void *) ((unsigned long) addr & ~7UL);
896#elif BITS_PER_LONG == 32
897 *bit += ((unsigned long) addr & 3UL) << 3;
898 addr = (void *) ((unsigned long) addr & ~3UL);
899#else
900#error "how many bits you are?!"
901#endif
902 return addr;
903}
904
905static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
906{
907 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
908 ocfs2_set_bit(bit, bitmap);
909}
910
911static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
912{
913 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
914 ocfs2_clear_bit(bit, bitmap);
915}
916
917static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
918{
919 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
920 return ocfs2_test_bit(bit, bitmap);
921}
922
923static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
924 int start)
925{
926 int fix = 0, ret, tmpmax;
927 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
928 tmpmax = max + fix;
929 start += fix;
930
931 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
932 if (ret > max)
933 return max;
934 return ret;
935}
936
937#endif
938
939