1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Defines macros and structures used in OCFS2
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
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.
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.
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.
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>
41 /* For union ocfs2_dlm_lksb */
42 #include "stackglue.h"
45 #include "ocfs2_lockid.h"
46 #include "ocfs2_ioctl.h"
48 /* For struct ocfs2_blockcheck_stats */
49 #include "blockcheck.h"
51 #include "reservations.h"
53 /* Caching of metadata buffers */
55 /* Most user visible OCFS2 inodes will have very few pieces of
56 * metadata, but larger files (including bitmaps, etc) must be taken
57 * into account when designing an access scheme. We allow a small
58 * amount of inlined blocks to be stored on an array and grow the
59 * structure into a rb tree when necessary. */
60 #define OCFS2_CACHE_INFO_MAX_ARRAY 2
62 /* Flags for ocfs2_caching_info */
64 enum ocfs2_caching_info_flags
{
65 /* Indicates that the metadata cache is using the inline array */
66 OCFS2_CACHE_FL_INLINE
= 1<<1,
69 struct ocfs2_caching_operations
;
70 struct ocfs2_caching_info
{
72 * The parent structure provides the locks, but because the
73 * parent structure can differ, it provides locking operations
74 * to struct ocfs2_caching_info.
76 const struct ocfs2_caching_operations
*ci_ops
;
78 /* next two are protected by trans_inc_lock */
79 /* which transaction were we created on? Zero if none. */
80 unsigned long ci_created_trans
;
81 /* last transaction we were a part of. */
82 unsigned long ci_last_trans
;
84 /* Cache structures */
85 unsigned int ci_flags
;
86 unsigned int ci_num_cached
;
88 sector_t ci_array
[OCFS2_CACHE_INFO_MAX_ARRAY
];
89 struct rb_root ci_tree
;
93 * Need this prototype here instead of in uptodate.h because journal.h
96 struct super_block
*ocfs2_metadata_cache_get_super(struct ocfs2_caching_info
*ci
);
98 /* this limits us to 256 nodes
99 * if we need more, we can do a kmalloc for the map */
100 #define OCFS2_NODE_MAP_MAX_NODES 256
101 struct ocfs2_node_map
{
103 unsigned long map
[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES
)];
106 enum ocfs2_ast_action
{
107 OCFS2_AST_INVALID
= 0,
110 OCFS2_AST_DOWNCONVERT
,
113 /* actions for an unlockast function to take. */
114 enum ocfs2_unlock_action
{
115 OCFS2_UNLOCK_INVALID
= 0,
116 OCFS2_UNLOCK_CANCEL_CONVERT
,
117 OCFS2_UNLOCK_DROP_LOCK
,
120 /* ocfs2_lock_res->l_flags flags. */
121 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
123 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
125 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
127 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
128 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
129 #define OCFS2_LOCK_REFRESHING (0x00000020)
130 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
131 * for shutdown paths */
132 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
133 * when to skip queueing
134 * a lock because it's
137 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
138 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
139 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
140 call to dlm_lock. Only
141 exists with BUSY set. */
142 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
143 * from downconverting
144 * before the upconvert
147 struct ocfs2_lock_res_ops
;
149 typedef void (*ocfs2_lock_callback
)(int status
, unsigned long data
);
151 #ifdef CONFIG_OCFS2_FS_STATS
152 struct ocfs2_lock_stats
{
153 u64 ls_total
; /* Total wait in NSEC */
154 u32 ls_gets
; /* Num acquires */
155 u32 ls_fail
; /* Num failed acquires */
157 /* Storing max wait in usecs saves 24 bytes per inode */
158 u32 ls_max
; /* Max wait in USEC */
162 struct ocfs2_lock_res
{
164 struct ocfs2_lock_res_ops
*l_ops
;
167 struct list_head l_blocked_list
;
168 struct list_head l_mask_waiters
;
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
;
175 signed char l_requested
;
176 signed char l_blocking
;
178 /* Data packed - type enum ocfs2_lock_type */
179 unsigned char l_type
;
181 /* used from AST/BAST funcs. */
182 /* Data packed - enum type ocfs2_ast_action */
183 unsigned char l_action
;
184 /* Data packed - enum type ocfs2_unlock_action */
185 unsigned char l_unlock_action
;
186 unsigned int l_pending_gen
;
190 struct ocfs2_dlm_lksb l_lksb
;
192 wait_queue_head_t l_event
;
194 struct list_head l_debug_list
;
196 #ifdef CONFIG_OCFS2_FS_STATS
197 struct ocfs2_lock_stats l_lock_prmode
; /* PR mode stats */
198 u32 l_lock_refresh
; /* Disk refreshes */
199 struct ocfs2_lock_stats l_lock_exmode
; /* EX mode stats */
201 #ifdef CONFIG_DEBUG_LOCK_ALLOC
202 struct lockdep_map l_lockdep_map
;
206 enum ocfs2_orphan_scan_state
{
211 struct ocfs2_orphan_scan
{
212 struct mutex os_lock
;
213 struct ocfs2_super
*os_osb
;
214 struct ocfs2_lock_res os_lockres
; /* lock to synchronize scans */
215 struct delayed_work os_orphan_scan_work
;
216 struct timespec os_scantime
; /* time this node ran the scan */
217 u32 os_count
; /* tracks node specific scans */
218 u32 os_seqno
; /* tracks cluster wide scans */
219 atomic_t os_state
; /* ACTIVE or INACTIVE */
222 struct ocfs2_dlm_debug
{
223 struct kref d_refcnt
;
224 struct dentry
*d_locking_state
;
225 struct list_head d_lockres_tracking
;
232 VOLUME_MOUNTED_QUOTAS
,
237 struct ocfs2_alloc_stats
241 atomic_t bitmap_data
;
246 enum ocfs2_local_alloc_state
248 OCFS2_LA_UNUSED
= 0, /* Local alloc will never be used for
249 * this mountpoint. */
250 OCFS2_LA_ENABLED
, /* Local alloc is in use. */
251 OCFS2_LA_THROTTLED
, /* Local alloc is in use, but number
252 * of bits has been reduced. */
253 OCFS2_LA_DISABLED
/* Local alloc has temporarily been
257 enum ocfs2_mount_options
259 OCFS2_MOUNT_HB_LOCAL
= 1 << 0, /* Local heartbeat */
260 OCFS2_MOUNT_BARRIER
= 1 << 1, /* Use block barriers */
261 OCFS2_MOUNT_NOINTR
= 1 << 2, /* Don't catch signals */
262 OCFS2_MOUNT_ERRORS_PANIC
= 1 << 3, /* Panic on errors */
263 OCFS2_MOUNT_DATA_WRITEBACK
= 1 << 4, /* No data ordering */
264 OCFS2_MOUNT_LOCALFLOCKS
= 1 << 5, /* No cluster aware user file locks */
265 OCFS2_MOUNT_NOUSERXATTR
= 1 << 6, /* No user xattr */
266 OCFS2_MOUNT_INODE64
= 1 << 7, /* Allow inode numbers > 2^32 */
267 OCFS2_MOUNT_POSIX_ACL
= 1 << 8, /* Force POSIX access control lists */
268 OCFS2_MOUNT_NO_POSIX_ACL
= 1 << 9, /* Disable POSIX access
270 OCFS2_MOUNT_USRQUOTA
= 1 << 10, /* We support user quotas */
271 OCFS2_MOUNT_GRPQUOTA
= 1 << 11, /* We support group quotas */
272 OCFS2_MOUNT_COHERENCY_BUFFERED
= 1 << 12, /* Allow concurrent O_DIRECT
274 OCFS2_MOUNT_HB_NONE
= 1 << 13, /* No heartbeat */
275 OCFS2_MOUNT_HB_GLOBAL
= 1 << 14, /* Global heartbeat */
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
283 struct ocfs2_journal
;
284 struct ocfs2_slot_info
;
285 struct ocfs2_recovery_map
;
286 struct ocfs2_replay_map
;
287 struct ocfs2_quota_recovery
;
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
;
297 struct ocfs2_slot_info
*slot_info
;
299 u32
*slot_recovery_generations
;
301 spinlock_t node_map_lock
;
304 u64 system_dir_blkno
;
311 u64 first_cluster_group_blkno
;
314 u32 s_feature_compat
;
315 u32 s_feature_incompat
;
316 u32 s_feature_ro_compat
;
318 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
319 * Could protect more on osb as it's very short lived.
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
;
329 unsigned long s_mount_opt
;
330 unsigned int s_atime_quantum
;
332 unsigned int max_slots
;
333 unsigned int node_num
;
338 int s_clustersize_bits
;
339 unsigned int s_xattr_inline_size
;
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
;
351 struct delayed_work la_enable_wq
;
354 * Must hold local alloc i_mutex and osb->osb_lock to change
355 * local_alloc_bits. Reads can be done under either lock.
357 unsigned int local_alloc_bits
;
358 unsigned int local_alloc_default_bits
;
359 /* osb_clusters_at_boot can become stale! Do not trust it to
361 unsigned int osb_clusters_at_boot
;
363 enum ocfs2_local_alloc_state local_alloc_state
; /* protected
366 struct buffer_head
*local_alloc_bh
;
370 struct ocfs2_reservation_map osb_la_resmap
;
372 unsigned int osb_resv_level
;
373 unsigned int osb_dir_resv_level
;
375 /* Next three fields are for local node slot recovery during
378 struct ocfs2_dinode
*local_alloc_copy
;
379 struct ocfs2_quota_recovery
*quota_rec
;
381 struct ocfs2_blockcheck_stats osb_ecc_stats
;
382 struct ocfs2_alloc_stats alloc_stats
;
383 char dev_str
[20]; /* "major,minor" of the device */
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
;
395 struct dentry
*osb_debug_root
;
396 struct dentry
*osb_ctxt
;
398 wait_queue_head_t recovery_event
;
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
;
407 * Any thread can add locks to the list, but the downconvert
408 * thread is the only one allowed to remove locks. Any change
409 * to this rule requires updating
410 * ocfs2_downconvert_thread_do_work().
412 struct list_head blocked_lock_list
;
413 unsigned long blocked_lock_count
;
415 /* List of dquot structures to drop last reference to */
416 struct llist_head dquot_drop_list
;
417 struct work_struct dquot_drop_work
;
419 wait_queue_head_t osb_mount_event
;
421 /* Truncate log info */
422 struct inode
*osb_tl_inode
;
423 struct buffer_head
*osb_tl_bh
;
424 struct delayed_work osb_truncate_log_wq
;
426 * How many clusters in our truncate log.
427 * It must be protected by osb_tl_inode->i_mutex.
429 unsigned int truncated_clusters
;
431 struct ocfs2_node_map osb_recovering_orphan_dirs
;
432 unsigned int *osb_orphan_wipes
;
433 wait_queue_head_t osb_wipe_event
;
435 struct ocfs2_orphan_scan osb_orphan_scan
;
437 /* used to protect metaecc calculation check of xattr. */
438 spinlock_t osb_xattr_lock
;
440 unsigned int osb_dx_mask
;
443 /* the group we used to allocate inodes. */
444 u64 osb_inode_alloc_group
;
446 /* rb tree root for refcount lock. */
447 struct rb_root osb_rf_lock_tree
;
448 struct ocfs2_refcount_tree
*osb_ref_tree_lru
;
450 struct mutex system_file_mutex
;
453 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
455 /* Useful typedef for passing around journal access functions */
456 typedef int (*ocfs2_journal_access_func
)(handle_t
*handle
,
457 struct ocfs2_caching_info
*ci
,
458 struct buffer_head
*bh
, int type
);
460 static inline int ocfs2_should_order_data(struct inode
*inode
)
462 if (!S_ISREG(inode
->i_mode
))
464 if (OCFS2_SB(inode
->i_sb
)->s_mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
)
469 static inline int ocfs2_sparse_alloc(struct ocfs2_super
*osb
)
471 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC
)
476 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super
*osb
)
479 * Support for sparse files is a pre-requisite
481 if (!ocfs2_sparse_alloc(osb
))
484 if (osb
->s_feature_ro_compat
& OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
)
489 static inline int ocfs2_supports_inline_data(struct ocfs2_super
*osb
)
491 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_INLINE_DATA
)
496 static inline int ocfs2_supports_xattr(struct ocfs2_super
*osb
)
498 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_XATTR
)
503 static inline int ocfs2_meta_ecc(struct ocfs2_super
*osb
)
505 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_META_ECC
)
510 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super
*osb
)
512 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS
)
517 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super
*osb
)
519 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG
)
524 static inline unsigned int ocfs2_link_max(struct ocfs2_super
*osb
)
526 if (ocfs2_supports_indexed_dirs(osb
))
527 return OCFS2_DX_LINK_MAX
;
528 return OCFS2_LINK_MAX
;
531 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode
*di
)
533 u32 nlink
= le16_to_cpu(di
->i_links_count
);
534 u32 hi
= le16_to_cpu(di
->i_links_count_hi
);
536 if (di
->i_dyn_features
& cpu_to_le16(OCFS2_INDEXED_DIR_FL
))
537 nlink
|= (hi
<< OCFS2_LINKS_HI_SHIFT
);
542 static inline void ocfs2_set_links_count(struct ocfs2_dinode
*di
, u32 nlink
)
547 hi
= nlink
>> OCFS2_LINKS_HI_SHIFT
;
549 di
->i_links_count
= cpu_to_le16(lo
);
550 di
->i_links_count_hi
= cpu_to_le16(hi
);
553 static inline void ocfs2_add_links_count(struct ocfs2_dinode
*di
, int n
)
555 u32 links
= ocfs2_read_links_count(di
);
559 ocfs2_set_links_count(di
, links
);
562 static inline int ocfs2_refcount_tree(struct ocfs2_super
*osb
)
564 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE
)
569 /* set / clear functions because cluster events can make these happen
570 * in parallel so we want the transitions to be atomic. this also
571 * means that any future flags osb_flags must be protected by spinlock
573 static inline void ocfs2_set_osb_flag(struct ocfs2_super
*osb
,
576 spin_lock(&osb
->osb_lock
);
577 osb
->osb_flags
|= flag
;
578 spin_unlock(&osb
->osb_lock
);
581 static inline void ocfs2_set_ro_flag(struct ocfs2_super
*osb
,
584 spin_lock(&osb
->osb_lock
);
585 osb
->osb_flags
&= ~(OCFS2_OSB_SOFT_RO
|OCFS2_OSB_HARD_RO
);
587 osb
->osb_flags
|= OCFS2_OSB_HARD_RO
;
589 osb
->osb_flags
|= OCFS2_OSB_SOFT_RO
;
590 spin_unlock(&osb
->osb_lock
);
593 static inline int ocfs2_is_hard_readonly(struct ocfs2_super
*osb
)
597 spin_lock(&osb
->osb_lock
);
598 ret
= osb
->osb_flags
& OCFS2_OSB_HARD_RO
;
599 spin_unlock(&osb
->osb_lock
);
604 static inline int ocfs2_is_soft_readonly(struct ocfs2_super
*osb
)
608 spin_lock(&osb
->osb_lock
);
609 ret
= osb
->osb_flags
& OCFS2_OSB_SOFT_RO
;
610 spin_unlock(&osb
->osb_lock
);
615 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super
*osb
)
617 return (osb
->s_feature_incompat
&
618 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK
|
619 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO
));
622 static inline int ocfs2_userspace_stack(struct ocfs2_super
*osb
)
624 if (ocfs2_clusterinfo_valid(osb
) &&
625 memcmp(osb
->osb_cluster_stack
, OCFS2_CLASSIC_CLUSTER_STACK
,
626 OCFS2_STACK_LABEL_LEN
))
631 static inline int ocfs2_o2cb_stack(struct ocfs2_super
*osb
)
633 if (ocfs2_clusterinfo_valid(osb
) &&
634 !memcmp(osb
->osb_cluster_stack
, OCFS2_CLASSIC_CLUSTER_STACK
,
635 OCFS2_STACK_LABEL_LEN
))
640 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super
*osb
)
642 return ocfs2_o2cb_stack(osb
) &&
643 (osb
->osb_stackflags
& OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT
);
646 static inline int ocfs2_mount_local(struct ocfs2_super
*osb
)
648 return (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT
);
651 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super
*osb
)
653 return (osb
->s_feature_incompat
&
654 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
);
658 #define OCFS2_IS_VALID_DINODE(ptr) \
659 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
661 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
662 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
664 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
665 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
668 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
669 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
671 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
672 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
674 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
675 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
677 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
678 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
680 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
681 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
683 static inline unsigned long ino_from_blkno(struct super_block
*sb
,
686 return (unsigned long)(blkno
& (u64
)ULONG_MAX
);
689 static inline u64
ocfs2_clusters_to_blocks(struct super_block
*sb
,
692 int c_to_b_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
693 sb
->s_blocksize_bits
;
695 return (u64
)clusters
<< c_to_b_bits
;
698 static inline u32
ocfs2_blocks_to_clusters(struct super_block
*sb
,
701 int b_to_c_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
702 sb
->s_blocksize_bits
;
704 return (u32
)(blocks
>> b_to_c_bits
);
707 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block
*sb
,
710 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
711 unsigned int clusters
;
713 bytes
+= OCFS2_SB(sb
)->s_clustersize
- 1;
714 /* OCFS2 just cannot have enough clusters to overflow this */
715 clusters
= (unsigned int)(bytes
>> cl_bits
);
720 static inline u64
ocfs2_blocks_for_bytes(struct super_block
*sb
,
723 bytes
+= sb
->s_blocksize
- 1;
724 return bytes
>> sb
->s_blocksize_bits
;
727 static inline u64
ocfs2_clusters_to_bytes(struct super_block
*sb
,
730 return (u64
)clusters
<< OCFS2_SB(sb
)->s_clustersize_bits
;
733 static inline u64
ocfs2_block_to_cluster_start(struct super_block
*sb
,
736 int bits
= OCFS2_SB(sb
)->s_clustersize_bits
- sb
->s_blocksize_bits
;
737 unsigned int clusters
;
739 clusters
= ocfs2_blocks_to_clusters(sb
, blocks
);
740 return (u64
)clusters
<< bits
;
743 static inline u64
ocfs2_align_bytes_to_clusters(struct super_block
*sb
,
746 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
747 unsigned int clusters
;
749 clusters
= ocfs2_clusters_for_bytes(sb
, bytes
);
750 return (u64
)clusters
<< cl_bits
;
753 static inline u64
ocfs2_align_bytes_to_blocks(struct super_block
*sb
,
758 blocks
= ocfs2_blocks_for_bytes(sb
, bytes
);
759 return blocks
<< sb
->s_blocksize_bits
;
762 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes
)
764 return (unsigned long)((bytes
+ 511) >> 9);
767 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block
*sb
,
768 unsigned long pg_index
)
770 u32 clusters
= pg_index
;
771 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
773 if (unlikely(PAGE_CACHE_SHIFT
> cbits
))
774 clusters
= pg_index
<< (PAGE_CACHE_SHIFT
- cbits
);
775 else if (PAGE_CACHE_SHIFT
< cbits
)
776 clusters
= pg_index
>> (cbits
- PAGE_CACHE_SHIFT
);
782 * Find the 1st page index which covers the given clusters.
784 static inline pgoff_t
ocfs2_align_clusters_to_page_index(struct super_block
*sb
,
787 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
788 pgoff_t index
= clusters
;
790 if (PAGE_CACHE_SHIFT
> cbits
) {
791 index
= (pgoff_t
)clusters
>> (PAGE_CACHE_SHIFT
- cbits
);
792 } else if (PAGE_CACHE_SHIFT
< cbits
) {
793 index
= (pgoff_t
)clusters
<< (cbits
- PAGE_CACHE_SHIFT
);
799 static inline unsigned int ocfs2_pages_per_cluster(struct super_block
*sb
)
801 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
802 unsigned int pages_per_cluster
= 1;
804 if (PAGE_CACHE_SHIFT
< cbits
)
805 pages_per_cluster
= 1 << (cbits
- PAGE_CACHE_SHIFT
);
807 return pages_per_cluster
;
810 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block
*sb
,
813 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE
> 1048576);
815 return megs
<< (20 - OCFS2_SB(sb
)->s_clustersize_bits
);
818 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block
*sb
,
819 unsigned int clusters
)
821 return clusters
>> (20 - OCFS2_SB(sb
)->s_clustersize_bits
);
824 static inline void _ocfs2_set_bit(unsigned int bit
, unsigned long *bitmap
)
826 __set_bit_le(bit
, bitmap
);
828 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
830 static inline void _ocfs2_clear_bit(unsigned int bit
, unsigned long *bitmap
)
832 __clear_bit_le(bit
, bitmap
);
834 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
836 #define ocfs2_test_bit test_bit_le
837 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
838 #define ocfs2_find_next_bit find_next_bit_le
840 static inline void *correct_addr_and_bit_unaligned(int *bit
, void *addr
)
842 #if BITS_PER_LONG == 64
843 *bit
+= ((unsigned long) addr
& 7UL) << 3;
844 addr
= (void *) ((unsigned long) addr
& ~7UL);
845 #elif BITS_PER_LONG == 32
846 *bit
+= ((unsigned long) addr
& 3UL) << 3;
847 addr
= (void *) ((unsigned long) addr
& ~3UL);
849 #error "how many bits you are?!"
854 static inline void ocfs2_set_bit_unaligned(int bit
, void *bitmap
)
856 bitmap
= correct_addr_and_bit_unaligned(&bit
, bitmap
);
857 ocfs2_set_bit(bit
, bitmap
);
860 static inline void ocfs2_clear_bit_unaligned(int bit
, void *bitmap
)
862 bitmap
= correct_addr_and_bit_unaligned(&bit
, bitmap
);
863 ocfs2_clear_bit(bit
, bitmap
);
866 static inline int ocfs2_test_bit_unaligned(int bit
, void *bitmap
)
868 bitmap
= correct_addr_and_bit_unaligned(&bit
, bitmap
);
869 return ocfs2_test_bit(bit
, bitmap
);
872 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap
, int max
,
875 int fix
= 0, ret
, tmpmax
;
876 bitmap
= correct_addr_and_bit_unaligned(&fix
, bitmap
);
880 ret
= ocfs2_find_next_zero_bit(bitmap
, tmpmax
, start
) - fix
;