1
2
3
4
5
6
7
8
9
10#ifndef OCFS2_H
11#define OCFS2_H
12
13#include <linux/spinlock.h>
14#include <linux/sched.h>
15#include <linux/wait.h>
16#include <linux/list.h>
17#include <linux/llist.h>
18#include <linux/rbtree.h>
19#include <linux/workqueue.h>
20#include <linux/kref.h>
21#include <linux/mutex.h>
22#include <linux/lockdep.h>
23#include <linux/jbd2.h>
24
25
26#include "stackglue.h"
27
28#include "ocfs2_fs.h"
29#include "ocfs2_lockid.h"
30#include "ocfs2_ioctl.h"
31
32
33#include "blockcheck.h"
34
35#include "reservations.h"
36
37#include "filecheck.h"
38
39
40
41
42
43
44
45
46#define OCFS2_CACHE_INFO_MAX_ARRAY 2
47
48
49
50enum ocfs2_caching_info_flags {
51
52 OCFS2_CACHE_FL_INLINE = 1<<1,
53};
54
55struct ocfs2_caching_operations;
56struct ocfs2_caching_info {
57
58
59
60
61
62 const struct ocfs2_caching_operations *ci_ops;
63
64
65
66 unsigned long ci_created_trans;
67
68 unsigned long ci_last_trans;
69
70
71 unsigned int ci_flags;
72 unsigned int ci_num_cached;
73 union {
74 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
75 struct rb_root ci_tree;
76 } ci_cache;
77};
78
79
80
81
82struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
83
84
85
86#define OCFS2_NODE_MAP_MAX_NODES 256
87struct ocfs2_node_map {
88 u16 num_nodes;
89 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
90};
91
92enum ocfs2_ast_action {
93 OCFS2_AST_INVALID = 0,
94 OCFS2_AST_ATTACH,
95 OCFS2_AST_CONVERT,
96 OCFS2_AST_DOWNCONVERT,
97};
98
99
100enum ocfs2_unlock_action {
101 OCFS2_UNLOCK_INVALID = 0,
102 OCFS2_UNLOCK_CANCEL_CONVERT,
103 OCFS2_UNLOCK_DROP_LOCK,
104};
105
106
107#define OCFS2_LOCK_ATTACHED (0x00000001)
108
109#define OCFS2_LOCK_BUSY (0x00000002)
110
111#define OCFS2_LOCK_BLOCKED (0x00000004)
112
113#define OCFS2_LOCK_LOCAL (0x00000008)
114#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
115#define OCFS2_LOCK_REFRESHING (0x00000020)
116#define OCFS2_LOCK_INITIALIZED (0x00000040)
117
118#define OCFS2_LOCK_FREEING (0x00000080)
119
120
121
122
123#define OCFS2_LOCK_QUEUED (0x00000100)
124#define OCFS2_LOCK_NOCACHE (0x00000200)
125#define OCFS2_LOCK_PENDING (0x00000400)
126
127
128#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800)
129
130
131
132
133#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000)
134
135
136
137
138
139struct ocfs2_lock_res_ops;
140
141typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
142
143#ifdef CONFIG_OCFS2_FS_STATS
144struct ocfs2_lock_stats {
145 u64 ls_total;
146 u32 ls_gets;
147 u32 ls_fail;
148
149
150 u32 ls_max;
151 u64 ls_last;
152};
153#endif
154
155struct ocfs2_lock_res {
156 void *l_priv;
157 struct ocfs2_lock_res_ops *l_ops;
158
159
160 struct list_head l_blocked_list;
161 struct list_head l_mask_waiters;
162 struct list_head l_holders;
163
164 unsigned long l_flags;
165 char l_name[OCFS2_LOCK_ID_MAX_LEN];
166 unsigned int l_ro_holders;
167 unsigned int l_ex_holders;
168 signed char l_level;
169 signed char l_requested;
170 signed char l_blocking;
171
172
173 unsigned char l_type;
174
175
176
177 unsigned char l_action;
178
179 unsigned char l_unlock_action;
180 unsigned int l_pending_gen;
181
182 spinlock_t l_lock;
183
184 struct ocfs2_dlm_lksb l_lksb;
185
186 wait_queue_head_t l_event;
187
188 struct list_head l_debug_list;
189
190#ifdef CONFIG_OCFS2_FS_STATS
191 struct ocfs2_lock_stats l_lock_prmode;
192 u32 l_lock_refresh;
193 u64 l_lock_wait;
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 u32 d_filter_secs;
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 OCFS2_MOUNT_NOCLUSTER = 1 << 18,
281};
282
283#define OCFS2_OSB_SOFT_RO 0x0001
284#define OCFS2_OSB_HARD_RO 0x0002
285#define OCFS2_OSB_ERROR_FS 0x0004
286#define OCFS2_DEFAULT_ATIME_QUANTUM 60
287
288struct ocfs2_journal;
289struct ocfs2_slot_info;
290struct ocfs2_recovery_map;
291struct ocfs2_replay_map;
292struct ocfs2_quota_recovery;
293struct ocfs2_super
294{
295 struct task_struct *commit_task;
296 struct super_block *sb;
297 struct inode *root_inode;
298 struct inode *sys_root_inode;
299 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
300 struct inode **local_system_inodes;
301
302 struct ocfs2_slot_info *slot_info;
303
304 u32 *slot_recovery_generations;
305
306 spinlock_t node_map_lock;
307
308 u64 root_blkno;
309 u64 system_dir_blkno;
310 u64 bitmap_blkno;
311 u32 bitmap_cpg;
312 char *uuid_str;
313 u32 uuid_hash;
314 u8 *vol_label;
315 u64 first_cluster_group_blkno;
316 u32 fs_generation;
317
318 u32 s_feature_compat;
319 u32 s_feature_incompat;
320 u32 s_feature_ro_compat;
321
322
323
324
325 spinlock_t osb_lock;
326 u32 s_next_generation;
327 unsigned long osb_flags;
328 u16 s_inode_steal_slot;
329 u16 s_meta_steal_slot;
330 atomic_t s_num_inodes_stolen;
331 atomic_t s_num_meta_stolen;
332
333 unsigned long s_mount_opt;
334 unsigned int s_atime_quantum;
335
336 unsigned int max_slots;
337 unsigned int node_num;
338 int slot_num;
339 int preferred_slot;
340 int s_sectsize_bits;
341 int s_clustersize;
342 int s_clustersize_bits;
343 unsigned int s_xattr_inline_size;
344
345 atomic_t vol_state;
346 struct mutex recovery_lock;
347 struct ocfs2_recovery_map *recovery_map;
348 struct ocfs2_replay_map *replay_map;
349 struct task_struct *recovery_thread_task;
350 int disable_recovery;
351 wait_queue_head_t checkpoint_event;
352 struct ocfs2_journal *journal;
353 unsigned long osb_commit_interval;
354
355 struct delayed_work la_enable_wq;
356
357
358
359
360
361 unsigned int local_alloc_bits;
362 unsigned int local_alloc_default_bits;
363
364
365 unsigned int osb_clusters_at_boot;
366
367 enum ocfs2_local_alloc_state local_alloc_state;
368
369
370 struct buffer_head *local_alloc_bh;
371
372 u64 la_last_gd;
373
374 struct ocfs2_reservation_map osb_la_resmap;
375
376 unsigned int osb_resv_level;
377 unsigned int osb_dir_resv_level;
378
379
380
381 struct ocfs2_dinode *local_alloc_copy;
382 struct ocfs2_quota_recovery *quota_rec;
383
384 struct ocfs2_blockcheck_stats osb_ecc_stats;
385 struct ocfs2_alloc_stats alloc_stats;
386 char dev_str[20];
387
388 u8 osb_stackflags;
389
390 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
391 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
392 struct ocfs2_cluster_connection *cconn;
393 struct ocfs2_lock_res osb_super_lockres;
394 struct ocfs2_lock_res osb_rename_lockres;
395 struct ocfs2_lock_res osb_nfs_sync_lockres;
396 struct rw_semaphore nfs_sync_rwlock;
397 struct ocfs2_lock_res osb_trim_fs_lockres;
398 struct mutex obs_trim_fs_mutex;
399 struct ocfs2_dlm_debug *osb_dlm_debug;
400
401 struct dentry *osb_debug_root;
402
403 wait_queue_head_t recovery_event;
404
405 spinlock_t dc_task_lock;
406 struct task_struct *dc_task;
407 wait_queue_head_t dc_event;
408 unsigned long dc_wake_sequence;
409 unsigned long dc_work_sequence;
410
411
412
413
414
415
416
417 struct list_head blocked_lock_list;
418 unsigned long blocked_lock_count;
419
420
421 struct llist_head dquot_drop_list;
422 struct work_struct dquot_drop_work;
423
424 wait_queue_head_t osb_mount_event;
425
426
427 struct inode *osb_tl_inode;
428 struct buffer_head *osb_tl_bh;
429 struct delayed_work osb_truncate_log_wq;
430 atomic_t osb_tl_disable;
431
432
433
434
435 unsigned int truncated_clusters;
436
437 struct ocfs2_node_map osb_recovering_orphan_dirs;
438 unsigned int *osb_orphan_wipes;
439 wait_queue_head_t osb_wipe_event;
440
441 struct ocfs2_orphan_scan osb_orphan_scan;
442
443
444 spinlock_t osb_xattr_lock;
445
446 unsigned int osb_dx_mask;
447 u32 osb_dx_seed[4];
448
449
450 u64 osb_inode_alloc_group;
451
452
453 struct rb_root osb_rf_lock_tree;
454 struct ocfs2_refcount_tree *osb_ref_tree_lru;
455
456 struct mutex system_file_mutex;
457
458
459
460
461
462
463
464 struct workqueue_struct *ocfs2_wq;
465
466
467 struct kset *osb_dev_kset;
468
469
470 struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
471};
472
473#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
474
475
476typedef int (*ocfs2_journal_access_func)(handle_t *handle,
477 struct ocfs2_caching_info *ci,
478 struct buffer_head *bh, int type);
479
480static inline int ocfs2_should_order_data(struct inode *inode)
481{
482 if (!S_ISREG(inode->i_mode))
483 return 0;
484 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
485 return 0;
486 return 1;
487}
488
489static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
490{
491 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
492 return 1;
493 return 0;
494}
495
496static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
497{
498
499
500
501 if (!ocfs2_sparse_alloc(osb))
502 return 0;
503
504 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
505 return 1;
506 return 0;
507}
508
509static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
510{
511 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
512 return 1;
513 return 0;
514}
515
516
517static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
518{
519 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
520 return 1;
521 return 0;
522}
523
524static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
525{
526 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
527 return 1;
528 return 0;
529}
530
531static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
532{
533 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
534 return 1;
535 return 0;
536}
537
538static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
539{
540 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
541 return 1;
542 return 0;
543}
544
545static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
546{
547 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
548 return 1;
549 return 0;
550}
551
552static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
553{
554 if (ocfs2_supports_indexed_dirs(osb))
555 return OCFS2_DX_LINK_MAX;
556 return OCFS2_LINK_MAX;
557}
558
559static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
560{
561 u32 nlink = le16_to_cpu(di->i_links_count);
562 u32 hi = le16_to_cpu(di->i_links_count_hi);
563
564 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
565 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
566
567 return nlink;
568}
569
570static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
571{
572 u16 lo, hi;
573
574 lo = nlink;
575 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
576
577 di->i_links_count = cpu_to_le16(lo);
578 di->i_links_count_hi = cpu_to_le16(hi);
579}
580
581static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
582{
583 u32 links = ocfs2_read_links_count(di);
584
585 links += n;
586
587 ocfs2_set_links_count(di, links);
588}
589
590static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
591{
592 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
593 return 1;
594 return 0;
595}
596
597
598
599
600
601static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
602 unsigned long flag)
603{
604 spin_lock(&osb->osb_lock);
605 osb->osb_flags |= flag;
606 spin_unlock(&osb->osb_lock);
607}
608
609static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
610 int hard)
611{
612 spin_lock(&osb->osb_lock);
613 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
614 if (hard)
615 osb->osb_flags |= OCFS2_OSB_HARD_RO;
616 else
617 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
618 spin_unlock(&osb->osb_lock);
619}
620
621static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
622{
623 int ret;
624
625 spin_lock(&osb->osb_lock);
626 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
627 spin_unlock(&osb->osb_lock);
628
629 return ret;
630}
631
632static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
633{
634 int ret;
635
636 spin_lock(&osb->osb_lock);
637 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
638 spin_unlock(&osb->osb_lock);
639
640 return ret;
641}
642
643static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
644{
645 return (osb->s_feature_incompat &
646 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
647 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
648}
649
650static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
651{
652 if (ocfs2_clusterinfo_valid(osb) &&
653 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
654 OCFS2_STACK_LABEL_LEN))
655 return 1;
656 return 0;
657}
658
659static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
660{
661 if (ocfs2_clusterinfo_valid(osb) &&
662 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
663 OCFS2_STACK_LABEL_LEN))
664 return 1;
665 return 0;
666}
667
668static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
669{
670 return ocfs2_o2cb_stack(osb) &&
671 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
672}
673
674static inline int ocfs2_mount_local(struct ocfs2_super *osb)
675{
676 return ((osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT)
677 || (osb->s_mount_opt & OCFS2_MOUNT_NOCLUSTER));
678}
679
680static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
681{
682 return (osb->s_feature_incompat &
683 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
684}
685
686
687#define OCFS2_IS_VALID_DINODE(ptr) \
688 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
689
690#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
691 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
692
693#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
694 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
695
696
697#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
698 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
699
700#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
701 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
702
703#define OCFS2_IS_VALID_DX_ROOT(ptr) \
704 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
705
706#define OCFS2_IS_VALID_DX_LEAF(ptr) \
707 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
708
709#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
710 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
711
712static inline unsigned long ino_from_blkno(struct super_block *sb,
713 u64 blkno)
714{
715 return (unsigned long)(blkno & (u64)ULONG_MAX);
716}
717
718static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
719 u32 clusters)
720{
721 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
722 sb->s_blocksize_bits;
723
724 return (u64)clusters << c_to_b_bits;
725}
726
727static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
728 u64 blocks)
729{
730 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
731 sb->s_blocksize_bits;
732
733 blocks += (1 << b_to_c_bits) - 1;
734 return (u32)(blocks >> b_to_c_bits);
735}
736
737static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
738 u64 blocks)
739{
740 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
741 sb->s_blocksize_bits;
742
743 return (u32)(blocks >> b_to_c_bits);
744}
745
746static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
747 u64 bytes)
748{
749 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
750 unsigned int clusters;
751
752 bytes += OCFS2_SB(sb)->s_clustersize - 1;
753
754 clusters = (unsigned int)(bytes >> cl_bits);
755
756 return clusters;
757}
758
759static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
760 u64 bytes)
761{
762 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
763 unsigned int clusters;
764
765 clusters = (unsigned int)(bytes >> cl_bits);
766 return clusters;
767}
768
769static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
770 u64 bytes)
771{
772 bytes += sb->s_blocksize - 1;
773 return bytes >> sb->s_blocksize_bits;
774}
775
776static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
777 u32 clusters)
778{
779 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
780}
781
782static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
783 u64 blocks)
784{
785 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
786 unsigned int clusters;
787
788 clusters = ocfs2_blocks_to_clusters(sb, blocks);
789 return (u64)clusters << bits;
790}
791
792static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
793 u64 bytes)
794{
795 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
796 unsigned int clusters;
797
798 clusters = ocfs2_clusters_for_bytes(sb, bytes);
799 return (u64)clusters << cl_bits;
800}
801
802static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
803 u64 bytes)
804{
805 u64 blocks;
806
807 blocks = ocfs2_blocks_for_bytes(sb, bytes);
808 return blocks << sb->s_blocksize_bits;
809}
810
811static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
812{
813 return (unsigned long)((bytes + 511) >> 9);
814}
815
816static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
817 unsigned long pg_index)
818{
819 u32 clusters = pg_index;
820 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
821
822 if (unlikely(PAGE_SHIFT > cbits))
823 clusters = pg_index << (PAGE_SHIFT - cbits);
824 else if (PAGE_SHIFT < cbits)
825 clusters = pg_index >> (cbits - PAGE_SHIFT);
826
827 return clusters;
828}
829
830
831
832
833static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
834 u32 clusters)
835{
836 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
837 pgoff_t index = clusters;
838
839 if (PAGE_SHIFT > cbits) {
840 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
841 } else if (PAGE_SHIFT < cbits) {
842 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
843 }
844
845 return index;
846}
847
848static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
849{
850 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
851 unsigned int pages_per_cluster = 1;
852
853 if (PAGE_SHIFT < cbits)
854 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
855
856 return pages_per_cluster;
857}
858
859static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
860 unsigned int megs)
861{
862 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
863
864 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
865}
866
867static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
868 unsigned int clusters)
869{
870 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
871}
872
873static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
874{
875 __set_bit_le(bit, bitmap);
876}
877#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
878
879static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
880{
881 __clear_bit_le(bit, bitmap);
882}
883#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
884
885#define ocfs2_test_bit test_bit_le
886#define ocfs2_find_next_zero_bit find_next_zero_bit_le
887#define ocfs2_find_next_bit find_next_bit_le
888
889static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
890{
891#if BITS_PER_LONG == 64
892 *bit += ((unsigned long) addr & 7UL) << 3;
893 addr = (void *) ((unsigned long) addr & ~7UL);
894#elif BITS_PER_LONG == 32
895 *bit += ((unsigned long) addr & 3UL) << 3;
896 addr = (void *) ((unsigned long) addr & ~3UL);
897#else
898#error "how many bits you are?!"
899#endif
900 return addr;
901}
902
903static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
904{
905 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
906 ocfs2_set_bit(bit, bitmap);
907}
908
909static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
910{
911 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
912 ocfs2_clear_bit(bit, bitmap);
913}
914
915static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
916{
917 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
918 return ocfs2_test_bit(bit, bitmap);
919}
920
921static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
922 int start)
923{
924 int fix = 0, ret, tmpmax;
925 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
926 tmpmax = max + fix;
927 start += fix;
928
929 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
930 if (ret > max)
931 return max;
932 return ret;
933}
934
935#endif
936
937