1
2
3
4
5
6
7
8
9
10
11
12#ifndef OCFS2_H
13#define OCFS2_H
14
15#include <linux/spinlock.h>
16#include <linux/sched.h>
17#include <linux/wait.h>
18#include <linux/list.h>
19#include <linux/llist.h>
20#include <linux/rbtree.h>
21#include <linux/workqueue.h>
22#include <linux/kref.h>
23#include <linux/mutex.h>
24#include <linux/lockdep.h>
25#include <linux/jbd2.h>
26
27
28#include "stackglue.h"
29
30#include "ocfs2_fs.h"
31#include "ocfs2_lockid.h"
32#include "ocfs2_ioctl.h"
33
34
35#include "blockcheck.h"
36
37#include "reservations.h"
38
39#include "filecheck.h"
40
41
42
43
44
45
46
47
48#define OCFS2_CACHE_INFO_MAX_ARRAY 2
49
50
51
52enum ocfs2_caching_info_flags {
53
54 OCFS2_CACHE_FL_INLINE = 1<<1,
55};
56
57struct ocfs2_caching_operations;
58struct ocfs2_caching_info {
59
60
61
62
63
64 const struct ocfs2_caching_operations *ci_ops;
65
66
67
68 unsigned long ci_created_trans;
69
70 unsigned long ci_last_trans;
71
72
73 unsigned int ci_flags;
74 unsigned int ci_num_cached;
75 union {
76 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
77 struct rb_root ci_tree;
78 } ci_cache;
79};
80
81
82
83
84struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
85
86
87
88#define OCFS2_NODE_MAP_MAX_NODES 256
89struct ocfs2_node_map {
90 u16 num_nodes;
91 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
92};
93
94enum ocfs2_ast_action {
95 OCFS2_AST_INVALID = 0,
96 OCFS2_AST_ATTACH,
97 OCFS2_AST_CONVERT,
98 OCFS2_AST_DOWNCONVERT,
99};
100
101
102enum ocfs2_unlock_action {
103 OCFS2_UNLOCK_INVALID = 0,
104 OCFS2_UNLOCK_CANCEL_CONVERT,
105 OCFS2_UNLOCK_DROP_LOCK,
106};
107
108
109#define OCFS2_LOCK_ATTACHED (0x00000001)
110
111#define OCFS2_LOCK_BUSY (0x00000002)
112
113#define OCFS2_LOCK_BLOCKED (0x00000004)
114
115#define OCFS2_LOCK_LOCAL (0x00000008)
116#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
117#define OCFS2_LOCK_REFRESHING (0x00000020)
118#define OCFS2_LOCK_INITIALIZED (0x00000040)
119
120#define OCFS2_LOCK_FREEING (0x00000080)
121
122
123
124
125#define OCFS2_LOCK_QUEUED (0x00000100)
126#define OCFS2_LOCK_NOCACHE (0x00000200)
127#define OCFS2_LOCK_PENDING (0x00000400)
128
129
130#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800)
131
132
133
134
135#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000)
136
137
138
139
140
141struct ocfs2_lock_res_ops;
142
143typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
144
145#ifdef CONFIG_OCFS2_FS_STATS
146struct ocfs2_lock_stats {
147 u64 ls_total;
148 u32 ls_gets;
149 u32 ls_fail;
150
151
152 u32 ls_max;
153};
154#endif
155
156struct ocfs2_lock_res {
157 void *l_priv;
158 struct ocfs2_lock_res_ops *l_ops;
159
160
161 struct list_head l_blocked_list;
162 struct list_head l_mask_waiters;
163 struct list_head l_holders;
164
165 unsigned long l_flags;
166 char l_name[OCFS2_LOCK_ID_MAX_LEN];
167 unsigned int l_ro_holders;
168 unsigned int l_ex_holders;
169 signed char l_level;
170 signed char l_requested;
171 signed char l_blocking;
172
173
174 unsigned char l_type;
175
176
177
178 unsigned char l_action;
179
180 unsigned char l_unlock_action;
181 unsigned int l_pending_gen;
182
183 spinlock_t l_lock;
184
185 struct ocfs2_dlm_lksb l_lksb;
186
187 wait_queue_head_t l_event;
188
189 struct list_head l_debug_list;
190
191#ifdef CONFIG_OCFS2_FS_STATS
192 struct ocfs2_lock_stats l_lock_prmode;
193 u32 l_lock_refresh;
194 struct ocfs2_lock_stats l_lock_exmode;
195#endif
196#ifdef CONFIG_DEBUG_LOCK_ALLOC
197 struct lockdep_map l_lockdep_map;
198#endif
199};
200
201enum ocfs2_orphan_reco_type {
202 ORPHAN_NO_NEED_TRUNCATE = 0,
203 ORPHAN_NEED_TRUNCATE,
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 time64_t 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 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15,
278 OCFS2_MOUNT_ERRORS_CONT = 1 << 16,
279 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17,
280};
281
282#define OCFS2_OSB_SOFT_RO 0x0001
283#define OCFS2_OSB_HARD_RO 0x0002
284#define OCFS2_OSB_ERROR_FS 0x0004
285#define OCFS2_DEFAULT_ATIME_QUANTUM 60
286
287struct ocfs2_journal;
288struct ocfs2_slot_info;
289struct ocfs2_recovery_map;
290struct ocfs2_replay_map;
291struct ocfs2_quota_recovery;
292struct ocfs2_super
293{
294 struct task_struct *commit_task;
295 struct super_block *sb;
296 struct inode *root_inode;
297 struct inode *sys_root_inode;
298 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
299 struct inode **local_system_inodes;
300
301 struct ocfs2_slot_info *slot_info;
302
303 u32 *slot_recovery_generations;
304
305 spinlock_t node_map_lock;
306
307 u64 root_blkno;
308 u64 system_dir_blkno;
309 u64 bitmap_blkno;
310 u32 bitmap_cpg;
311 char *uuid_str;
312 u32 uuid_hash;
313 u8 *vol_label;
314 u64 first_cluster_group_blkno;
315 u32 fs_generation;
316
317 u32 s_feature_compat;
318 u32 s_feature_incompat;
319 u32 s_feature_ro_compat;
320
321
322
323
324 spinlock_t osb_lock;
325 u32 s_next_generation;
326 unsigned long osb_flags;
327 s16 s_inode_steal_slot;
328 s16 s_meta_steal_slot;
329 atomic_t s_num_inodes_stolen;
330 atomic_t s_num_meta_stolen;
331
332 unsigned long s_mount_opt;
333 unsigned int s_atime_quantum;
334
335 unsigned int max_slots;
336 unsigned int node_num;
337 int slot_num;
338 int preferred_slot;
339 int s_sectsize_bits;
340 int s_clustersize;
341 int s_clustersize_bits;
342 unsigned int s_xattr_inline_size;
343
344 atomic_t vol_state;
345 struct mutex recovery_lock;
346 struct ocfs2_recovery_map *recovery_map;
347 struct ocfs2_replay_map *replay_map;
348 struct task_struct *recovery_thread_task;
349 int disable_recovery;
350 wait_queue_head_t checkpoint_event;
351 struct ocfs2_journal *journal;
352 unsigned long osb_commit_interval;
353
354 struct delayed_work la_enable_wq;
355
356
357
358
359
360 unsigned int local_alloc_bits;
361 unsigned int local_alloc_default_bits;
362
363
364 unsigned int osb_clusters_at_boot;
365
366 enum ocfs2_local_alloc_state local_alloc_state;
367
368
369 struct buffer_head *local_alloc_bh;
370
371 u64 la_last_gd;
372
373 struct ocfs2_reservation_map osb_la_resmap;
374
375 unsigned int osb_resv_level;
376 unsigned int osb_dir_resv_level;
377
378
379
380 struct ocfs2_dinode *local_alloc_copy;
381 struct ocfs2_quota_recovery *quota_rec;
382
383 struct ocfs2_blockcheck_stats osb_ecc_stats;
384 struct ocfs2_alloc_stats alloc_stats;
385 char dev_str[20];
386
387 u8 osb_stackflags;
388
389 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
390 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
391 struct ocfs2_cluster_connection *cconn;
392 struct ocfs2_lock_res osb_super_lockres;
393 struct ocfs2_lock_res osb_rename_lockres;
394 struct ocfs2_lock_res osb_nfs_sync_lockres;
395 struct ocfs2_lock_res osb_trim_fs_lockres;
396 struct mutex obs_trim_fs_mutex;
397 struct ocfs2_dlm_debug *osb_dlm_debug;
398
399 struct dentry *osb_debug_root;
400 struct dentry *osb_ctxt;
401
402 wait_queue_head_t recovery_event;
403
404 spinlock_t dc_task_lock;
405 struct task_struct *dc_task;
406 wait_queue_head_t dc_event;
407 unsigned long dc_wake_sequence;
408 unsigned long dc_work_sequence;
409
410
411
412
413
414
415
416 struct list_head blocked_lock_list;
417 unsigned long blocked_lock_count;
418
419
420 struct llist_head dquot_drop_list;
421 struct work_struct dquot_drop_work;
422
423 wait_queue_head_t osb_mount_event;
424
425
426 struct inode *osb_tl_inode;
427 struct buffer_head *osb_tl_bh;
428 struct delayed_work osb_truncate_log_wq;
429 atomic_t osb_tl_disable;
430
431
432
433
434 unsigned int truncated_clusters;
435
436 struct ocfs2_node_map osb_recovering_orphan_dirs;
437 unsigned int *osb_orphan_wipes;
438 wait_queue_head_t osb_wipe_event;
439
440 struct ocfs2_orphan_scan osb_orphan_scan;
441
442
443 spinlock_t osb_xattr_lock;
444
445 unsigned int osb_dx_mask;
446 u32 osb_dx_seed[4];
447
448
449 u64 osb_inode_alloc_group;
450
451
452 struct rb_root osb_rf_lock_tree;
453 struct ocfs2_refcount_tree *osb_ref_tree_lru;
454
455 struct mutex system_file_mutex;
456
457
458
459
460
461
462
463 struct workqueue_struct *ocfs2_wq;
464
465
466 struct kset *osb_dev_kset;
467
468
469 struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
470};
471
472#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
473
474
475typedef int (*ocfs2_journal_access_func)(handle_t *handle,
476 struct ocfs2_caching_info *ci,
477 struct buffer_head *bh, int type);
478
479static inline int ocfs2_should_order_data(struct inode *inode)
480{
481 if (!S_ISREG(inode->i_mode))
482 return 0;
483 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
484 return 0;
485 return 1;
486}
487
488static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
489{
490 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
491 return 1;
492 return 0;
493}
494
495static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
496{
497
498
499
500 if (!ocfs2_sparse_alloc(osb))
501 return 0;
502
503 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
504 return 1;
505 return 0;
506}
507
508static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
509{
510 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
511 return 1;
512 return 0;
513}
514
515
516static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
517{
518 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
519 return 1;
520 return 0;
521}
522
523static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
524{
525 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
526 return 1;
527 return 0;
528}
529
530static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
531{
532 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
533 return 1;
534 return 0;
535}
536
537static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
538{
539 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
540 return 1;
541 return 0;
542}
543
544static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
545{
546 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
547 return 1;
548 return 0;
549}
550
551static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
552{
553 if (ocfs2_supports_indexed_dirs(osb))
554 return OCFS2_DX_LINK_MAX;
555 return OCFS2_LINK_MAX;
556}
557
558static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
559{
560 u32 nlink = le16_to_cpu(di->i_links_count);
561 u32 hi = le16_to_cpu(di->i_links_count_hi);
562
563 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
564 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
565
566 return nlink;
567}
568
569static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
570{
571 u16 lo, hi;
572
573 lo = nlink;
574 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
575
576 di->i_links_count = cpu_to_le16(lo);
577 di->i_links_count_hi = cpu_to_le16(hi);
578}
579
580static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
581{
582 u32 links = ocfs2_read_links_count(di);
583
584 links += n;
585
586 ocfs2_set_links_count(di, links);
587}
588
589static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
590{
591 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
592 return 1;
593 return 0;
594}
595
596
597
598
599
600static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
601 unsigned long flag)
602{
603 spin_lock(&osb->osb_lock);
604 osb->osb_flags |= flag;
605 spin_unlock(&osb->osb_lock);
606}
607
608static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
609 int hard)
610{
611 spin_lock(&osb->osb_lock);
612 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
613 if (hard)
614 osb->osb_flags |= OCFS2_OSB_HARD_RO;
615 else
616 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
617 spin_unlock(&osb->osb_lock);
618}
619
620static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
621{
622 int ret;
623
624 spin_lock(&osb->osb_lock);
625 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
626 spin_unlock(&osb->osb_lock);
627
628 return ret;
629}
630
631static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
632{
633 int ret;
634
635 spin_lock(&osb->osb_lock);
636 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
637 spin_unlock(&osb->osb_lock);
638
639 return ret;
640}
641
642static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
643{
644 return (osb->s_feature_incompat &
645 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
646 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
647}
648
649static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
650{
651 if (ocfs2_clusterinfo_valid(osb) &&
652 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
653 OCFS2_STACK_LABEL_LEN))
654 return 1;
655 return 0;
656}
657
658static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
659{
660 if (ocfs2_clusterinfo_valid(osb) &&
661 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
662 OCFS2_STACK_LABEL_LEN))
663 return 1;
664 return 0;
665}
666
667static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
668{
669 return ocfs2_o2cb_stack(osb) &&
670 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
671}
672
673static inline int ocfs2_mount_local(struct ocfs2_super *osb)
674{
675 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
676}
677
678static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
679{
680 return (osb->s_feature_incompat &
681 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
682}
683
684
685#define OCFS2_IS_VALID_DINODE(ptr) \
686 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
687
688#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
689 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
690
691#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
692 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
693
694
695#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
696 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
697
698#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
699 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
700
701#define OCFS2_IS_VALID_DX_ROOT(ptr) \
702 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
703
704#define OCFS2_IS_VALID_DX_LEAF(ptr) \
705 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
706
707#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
708 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
709
710static inline unsigned long ino_from_blkno(struct super_block *sb,
711 u64 blkno)
712{
713 return (unsigned long)(blkno & (u64)ULONG_MAX);
714}
715
716static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
717 u32 clusters)
718{
719 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
720 sb->s_blocksize_bits;
721
722 return (u64)clusters << c_to_b_bits;
723}
724
725static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
726 u64 blocks)
727{
728 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
729 sb->s_blocksize_bits;
730
731 blocks += (1 << b_to_c_bits) - 1;
732 return (u32)(blocks >> b_to_c_bits);
733}
734
735static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
736 u64 blocks)
737{
738 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
739 sb->s_blocksize_bits;
740
741 return (u32)(blocks >> b_to_c_bits);
742}
743
744static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
745 u64 bytes)
746{
747 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
748 unsigned int clusters;
749
750 bytes += OCFS2_SB(sb)->s_clustersize - 1;
751
752 clusters = (unsigned int)(bytes >> cl_bits);
753
754 return clusters;
755}
756
757static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
758 u64 bytes)
759{
760 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
761 unsigned int clusters;
762
763 clusters = (unsigned int)(bytes >> cl_bits);
764 return clusters;
765}
766
767static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
768 u64 bytes)
769{
770 bytes += sb->s_blocksize - 1;
771 return bytes >> sb->s_blocksize_bits;
772}
773
774static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
775 u32 clusters)
776{
777 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
778}
779
780static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
781 u64 blocks)
782{
783 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
784 unsigned int clusters;
785
786 clusters = ocfs2_blocks_to_clusters(sb, blocks);
787 return (u64)clusters << bits;
788}
789
790static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
791 u64 bytes)
792{
793 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
794 unsigned int clusters;
795
796 clusters = ocfs2_clusters_for_bytes(sb, bytes);
797 return (u64)clusters << cl_bits;
798}
799
800static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
801 u64 bytes)
802{
803 u64 blocks;
804
805 blocks = ocfs2_blocks_for_bytes(sb, bytes);
806 return blocks << sb->s_blocksize_bits;
807}
808
809static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
810{
811 return (unsigned long)((bytes + 511) >> 9);
812}
813
814static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
815 unsigned long pg_index)
816{
817 u32 clusters = pg_index;
818 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
819
820 if (unlikely(PAGE_SHIFT > cbits))
821 clusters = pg_index << (PAGE_SHIFT - cbits);
822 else if (PAGE_SHIFT < cbits)
823 clusters = pg_index >> (cbits - PAGE_SHIFT);
824
825 return clusters;
826}
827
828
829
830
831static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
832 u32 clusters)
833{
834 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
835 pgoff_t index = clusters;
836
837 if (PAGE_SHIFT > cbits) {
838 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
839 } else if (PAGE_SHIFT < cbits) {
840 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
841 }
842
843 return index;
844}
845
846static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
847{
848 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
849 unsigned int pages_per_cluster = 1;
850
851 if (PAGE_SHIFT < cbits)
852 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
853
854 return pages_per_cluster;
855}
856
857static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
858 unsigned int megs)
859{
860 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
861
862 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
863}
864
865static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
866 unsigned int clusters)
867{
868 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
869}
870
871static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
872{
873 __set_bit_le(bit, bitmap);
874}
875#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
876
877static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
878{
879 __clear_bit_le(bit, bitmap);
880}
881#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
882
883#define ocfs2_test_bit test_bit_le
884#define ocfs2_find_next_zero_bit find_next_zero_bit_le
885#define ocfs2_find_next_bit find_next_bit_le
886
887static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
888{
889#if BITS_PER_LONG == 64
890 *bit += ((unsigned long) addr & 7UL) << 3;
891 addr = (void *) ((unsigned long) addr & ~7UL);
892#elif BITS_PER_LONG == 32
893 *bit += ((unsigned long) addr & 3UL) << 3;
894 addr = (void *) ((unsigned long) addr & ~3UL);
895#else
896#error "how many bits you are?!"
897#endif
898 return addr;
899}
900
901static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
902{
903 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
904 ocfs2_set_bit(bit, bitmap);
905}
906
907static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
908{
909 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
910 ocfs2_clear_bit(bit, bitmap);
911}
912
913static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
914{
915 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
916 return ocfs2_test_bit(bit, bitmap);
917}
918
919static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
920 int start)
921{
922 int fix = 0, ret, tmpmax;
923 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
924 tmpmax = max + fix;
925 start += fix;
926
927 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
928 if (ret > max)
929 return max;
930 return ret;
931}
932
933#endif
934
935