1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
7 * Defines macros and structures used in OCFS2
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
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>
27 /* For union ocfs2_dlm_lksb */
28 #include "stackglue.h"
31 #include "ocfs2_lockid.h"
32 #include "ocfs2_ioctl.h"
34 /* For struct ocfs2_blockcheck_stats */
35 #include "blockcheck.h"
37 #include "reservations.h"
39 #include "filecheck.h"
41 /* Caching of metadata buffers */
43 /* Most user visible OCFS2 inodes will have very few pieces of
44 * metadata, but larger files (including bitmaps, etc) must be taken
45 * into account when designing an access scheme. We allow a small
46 * amount of inlined blocks to be stored on an array and grow the
47 * structure into a rb tree when necessary. */
48 #define OCFS2_CACHE_INFO_MAX_ARRAY 2
50 /* Flags for ocfs2_caching_info */
52 enum ocfs2_caching_info_flags
{
53 /* Indicates that the metadata cache is using the inline array */
54 OCFS2_CACHE_FL_INLINE
= 1<<1,
57 struct ocfs2_caching_operations
;
58 struct ocfs2_caching_info
{
60 * The parent structure provides the locks, but because the
61 * parent structure can differ, it provides locking operations
62 * to struct ocfs2_caching_info.
64 const struct ocfs2_caching_operations
*ci_ops
;
66 /* next two are protected by trans_inc_lock */
67 /* which transaction were we created on? Zero if none. */
68 unsigned long ci_created_trans
;
69 /* last transaction we were a part of. */
70 unsigned long ci_last_trans
;
72 /* Cache structures */
73 unsigned int ci_flags
;
74 unsigned int ci_num_cached
;
76 sector_t ci_array
[OCFS2_CACHE_INFO_MAX_ARRAY
];
77 struct rb_root ci_tree
;
81 * Need this prototype here instead of in uptodate.h because journal.h
84 struct super_block
*ocfs2_metadata_cache_get_super(struct ocfs2_caching_info
*ci
);
86 /* this limits us to 256 nodes
87 * if we need more, we can do a kmalloc for the map */
88 #define OCFS2_NODE_MAP_MAX_NODES 256
89 struct ocfs2_node_map
{
91 unsigned long map
[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES
)];
94 enum ocfs2_ast_action
{
95 OCFS2_AST_INVALID
= 0,
98 OCFS2_AST_DOWNCONVERT
,
101 /* actions for an unlockast function to take. */
102 enum ocfs2_unlock_action
{
103 OCFS2_UNLOCK_INVALID
= 0,
104 OCFS2_UNLOCK_CANCEL_CONVERT
,
105 OCFS2_UNLOCK_DROP_LOCK
,
108 /* ocfs2_lock_res->l_flags flags. */
109 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
111 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
113 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
115 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
116 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
117 #define OCFS2_LOCK_REFRESHING (0x00000020)
118 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
119 * for shutdown paths */
120 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
121 * when to skip queueing
122 * a lock because it's
125 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
126 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
127 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
128 call to dlm_lock. Only
129 exists with BUSY set. */
130 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
131 * from downconverting
132 * before the upconvert
135 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
137 * returned, do not block
141 struct ocfs2_lock_res_ops
;
143 typedef void (*ocfs2_lock_callback
)(int status
, unsigned long data
);
145 #ifdef CONFIG_OCFS2_FS_STATS
146 struct ocfs2_lock_stats
{
147 u64 ls_total
; /* Total wait in NSEC */
148 u32 ls_gets
; /* Num acquires */
149 u32 ls_fail
; /* Num failed acquires */
151 /* Storing max wait in usecs saves 24 bytes per inode */
152 u32 ls_max
; /* Max wait in USEC */
153 u64 ls_last
; /* Last unlock time in USEC */
157 struct ocfs2_lock_res
{
159 struct ocfs2_lock_res_ops
*l_ops
;
162 struct list_head l_blocked_list
;
163 struct list_head l_mask_waiters
;
164 struct list_head l_holders
;
166 unsigned long l_flags
;
167 char l_name
[OCFS2_LOCK_ID_MAX_LEN
];
168 unsigned int l_ro_holders
;
169 unsigned int l_ex_holders
;
171 signed char l_requested
;
172 signed char l_blocking
;
174 /* Data packed - type enum ocfs2_lock_type */
175 unsigned char l_type
;
177 /* used from AST/BAST funcs. */
178 /* Data packed - enum type ocfs2_ast_action */
179 unsigned char l_action
;
180 /* Data packed - enum type ocfs2_unlock_action */
181 unsigned char l_unlock_action
;
182 unsigned int l_pending_gen
;
186 struct ocfs2_dlm_lksb l_lksb
;
188 wait_queue_head_t l_event
;
190 struct list_head l_debug_list
;
192 #ifdef CONFIG_OCFS2_FS_STATS
193 struct ocfs2_lock_stats l_lock_prmode
; /* PR mode stats */
194 u32 l_lock_refresh
; /* Disk refreshes */
195 u64 l_lock_wait
; /* First lock wait time */
196 struct ocfs2_lock_stats l_lock_exmode
; /* EX mode stats */
198 #ifdef CONFIG_DEBUG_LOCK_ALLOC
199 struct lockdep_map l_lockdep_map
;
203 enum ocfs2_orphan_reco_type
{
204 ORPHAN_NO_NEED_TRUNCATE
= 0,
205 ORPHAN_NEED_TRUNCATE
,
208 enum ocfs2_orphan_scan_state
{
213 struct ocfs2_orphan_scan
{
214 struct mutex os_lock
;
215 struct ocfs2_super
*os_osb
;
216 struct ocfs2_lock_res os_lockres
; /* lock to synchronize scans */
217 struct delayed_work os_orphan_scan_work
;
218 time64_t os_scantime
; /* time this node ran the scan */
219 u32 os_count
; /* tracks node specific scans */
220 u32 os_seqno
; /* tracks cluster wide scans */
221 atomic_t os_state
; /* ACTIVE or INACTIVE */
224 struct ocfs2_dlm_debug
{
225 struct kref d_refcnt
;
227 struct list_head d_lockres_tracking
;
234 VOLUME_MOUNTED_QUOTAS
,
239 struct ocfs2_alloc_stats
243 atomic_t bitmap_data
;
248 enum ocfs2_local_alloc_state
250 OCFS2_LA_UNUSED
= 0, /* Local alloc will never be used for
251 * this mountpoint. */
252 OCFS2_LA_ENABLED
, /* Local alloc is in use. */
253 OCFS2_LA_THROTTLED
, /* Local alloc is in use, but number
254 * of bits has been reduced. */
255 OCFS2_LA_DISABLED
/* Local alloc has temporarily been
259 enum ocfs2_mount_options
261 OCFS2_MOUNT_HB_LOCAL
= 1 << 0, /* Local heartbeat */
262 OCFS2_MOUNT_BARRIER
= 1 << 1, /* Use block barriers */
263 OCFS2_MOUNT_NOINTR
= 1 << 2, /* Don't catch signals */
264 OCFS2_MOUNT_ERRORS_PANIC
= 1 << 3, /* Panic on errors */
265 OCFS2_MOUNT_DATA_WRITEBACK
= 1 << 4, /* No data ordering */
266 OCFS2_MOUNT_LOCALFLOCKS
= 1 << 5, /* No cluster aware user file locks */
267 OCFS2_MOUNT_NOUSERXATTR
= 1 << 6, /* No user xattr */
268 OCFS2_MOUNT_INODE64
= 1 << 7, /* Allow inode numbers > 2^32 */
269 OCFS2_MOUNT_POSIX_ACL
= 1 << 8, /* Force POSIX access control lists */
270 OCFS2_MOUNT_NO_POSIX_ACL
= 1 << 9, /* Disable POSIX access
272 OCFS2_MOUNT_USRQUOTA
= 1 << 10, /* We support user quotas */
273 OCFS2_MOUNT_GRPQUOTA
= 1 << 11, /* We support group quotas */
274 OCFS2_MOUNT_COHERENCY_BUFFERED
= 1 << 12, /* Allow concurrent O_DIRECT
276 OCFS2_MOUNT_HB_NONE
= 1 << 13, /* No heartbeat */
277 OCFS2_MOUNT_HB_GLOBAL
= 1 << 14, /* Global heartbeat */
279 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT
= 1 << 15, /* Journal Async Commit */
280 OCFS2_MOUNT_ERRORS_CONT
= 1 << 16, /* Return EIO to the calling process on error */
281 OCFS2_MOUNT_ERRORS_ROFS
= 1 << 17, /* Change filesystem to read-only on error */
282 OCFS2_MOUNT_NOCLUSTER
= 1 << 18, /* No cluster aware filesystem mount */
285 #define OCFS2_OSB_SOFT_RO 0x0001
286 #define OCFS2_OSB_HARD_RO 0x0002
287 #define OCFS2_OSB_ERROR_FS 0x0004
288 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
290 struct ocfs2_journal
;
291 struct ocfs2_slot_info
;
292 struct ocfs2_recovery_map
;
293 struct ocfs2_replay_map
;
294 struct ocfs2_quota_recovery
;
297 struct task_struct
*commit_task
;
298 struct super_block
*sb
;
299 struct inode
*root_inode
;
300 struct inode
*sys_root_inode
;
301 struct inode
*global_system_inodes
[NUM_GLOBAL_SYSTEM_INODES
];
302 struct inode
**local_system_inodes
;
304 struct ocfs2_slot_info
*slot_info
;
306 u32
*slot_recovery_generations
;
308 spinlock_t node_map_lock
;
311 u64 system_dir_blkno
;
317 u64 first_cluster_group_blkno
;
320 u32 s_feature_compat
;
321 u32 s_feature_incompat
;
322 u32 s_feature_ro_compat
;
324 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
325 * Could protect more on osb as it's very short lived.
328 u32 s_next_generation
;
329 unsigned long osb_flags
;
330 u16 s_inode_steal_slot
;
331 u16 s_meta_steal_slot
;
332 atomic_t s_num_inodes_stolen
;
333 atomic_t s_num_meta_stolen
;
335 unsigned long s_mount_opt
;
336 unsigned int s_atime_quantum
;
338 unsigned int max_slots
;
339 unsigned int node_num
;
344 int s_clustersize_bits
;
345 unsigned int s_xattr_inline_size
;
348 struct mutex recovery_lock
;
349 struct ocfs2_recovery_map
*recovery_map
;
350 struct ocfs2_replay_map
*replay_map
;
351 struct task_struct
*recovery_thread_task
;
352 int disable_recovery
;
353 wait_queue_head_t checkpoint_event
;
354 struct ocfs2_journal
*journal
;
355 unsigned long osb_commit_interval
;
357 struct delayed_work la_enable_wq
;
360 * Must hold local alloc i_mutex and osb->osb_lock to change
361 * local_alloc_bits. Reads can be done under either lock.
363 unsigned int local_alloc_bits
;
364 unsigned int local_alloc_default_bits
;
365 /* osb_clusters_at_boot can become stale! Do not trust it to
367 unsigned int osb_clusters_at_boot
;
369 enum ocfs2_local_alloc_state local_alloc_state
; /* protected
372 struct buffer_head
*local_alloc_bh
;
376 struct ocfs2_reservation_map osb_la_resmap
;
378 unsigned int osb_resv_level
;
379 unsigned int osb_dir_resv_level
;
381 /* Next two fields are for local node slot recovery during
383 struct ocfs2_dinode
*local_alloc_copy
;
384 struct ocfs2_quota_recovery
*quota_rec
;
386 struct ocfs2_blockcheck_stats osb_ecc_stats
;
387 struct ocfs2_alloc_stats alloc_stats
;
388 char dev_str
[20]; /* "major,minor" of the device */
392 char osb_cluster_stack
[OCFS2_STACK_LABEL_LEN
+ 1];
393 char osb_cluster_name
[OCFS2_CLUSTER_NAME_LEN
+ 1];
394 struct ocfs2_cluster_connection
*cconn
;
395 struct ocfs2_lock_res osb_super_lockres
;
396 struct ocfs2_lock_res osb_rename_lockres
;
397 struct ocfs2_lock_res osb_nfs_sync_lockres
;
398 struct rw_semaphore nfs_sync_rwlock
;
399 struct ocfs2_lock_res osb_trim_fs_lockres
;
400 struct mutex obs_trim_fs_mutex
;
401 struct ocfs2_dlm_debug
*osb_dlm_debug
;
403 struct dentry
*osb_debug_root
;
405 wait_queue_head_t recovery_event
;
407 spinlock_t dc_task_lock
;
408 struct task_struct
*dc_task
;
409 wait_queue_head_t dc_event
;
410 unsigned long dc_wake_sequence
;
411 unsigned long dc_work_sequence
;
414 * Any thread can add locks to the list, but the downconvert
415 * thread is the only one allowed to remove locks. Any change
416 * to this rule requires updating
417 * ocfs2_downconvert_thread_do_work().
419 struct list_head blocked_lock_list
;
420 unsigned long blocked_lock_count
;
422 /* List of dquot structures to drop last reference to */
423 struct llist_head dquot_drop_list
;
424 struct work_struct dquot_drop_work
;
426 wait_queue_head_t osb_mount_event
;
428 /* Truncate log info */
429 struct inode
*osb_tl_inode
;
430 struct buffer_head
*osb_tl_bh
;
431 struct delayed_work osb_truncate_log_wq
;
432 atomic_t osb_tl_disable
;
434 * How many clusters in our truncate log.
435 * It must be protected by osb_tl_inode->i_mutex.
437 unsigned int truncated_clusters
;
439 struct ocfs2_node_map osb_recovering_orphan_dirs
;
440 unsigned int *osb_orphan_wipes
;
441 wait_queue_head_t osb_wipe_event
;
443 struct ocfs2_orphan_scan osb_orphan_scan
;
445 /* used to protect metaecc calculation check of xattr. */
446 spinlock_t osb_xattr_lock
;
448 unsigned int osb_dx_mask
;
451 /* the group we used to allocate inodes. */
452 u64 osb_inode_alloc_group
;
454 /* rb tree root for refcount lock. */
455 struct rb_root osb_rf_lock_tree
;
456 struct ocfs2_refcount_tree
*osb_ref_tree_lru
;
458 struct mutex system_file_mutex
;
461 * OCFS2 needs to schedule several different types of work which
462 * require cluster locking, disk I/O, recovery waits, etc. Since these
463 * types of work tend to be heavy we avoid using the kernel events
464 * workqueue and schedule on our own.
466 struct workqueue_struct
*ocfs2_wq
;
468 /* sysfs directory per partition */
469 struct kset
*osb_dev_kset
;
471 /* file check related stuff */
472 struct ocfs2_filecheck_sysfs_entry osb_fc_ent
;
475 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
477 /* Useful typedef for passing around journal access functions */
478 typedef int (*ocfs2_journal_access_func
)(handle_t
*handle
,
479 struct ocfs2_caching_info
*ci
,
480 struct buffer_head
*bh
, int type
);
482 static inline int ocfs2_should_order_data(struct inode
*inode
)
484 if (!S_ISREG(inode
->i_mode
))
486 if (OCFS2_SB(inode
->i_sb
)->s_mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
)
491 static inline int ocfs2_sparse_alloc(struct ocfs2_super
*osb
)
493 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC
)
498 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super
*osb
)
501 * Support for sparse files is a pre-requisite
503 if (!ocfs2_sparse_alloc(osb
))
506 if (osb
->s_feature_ro_compat
& OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
)
511 static inline int ocfs2_supports_append_dio(struct ocfs2_super
*osb
)
513 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_APPEND_DIO
)
519 static inline int ocfs2_supports_inline_data(struct ocfs2_super
*osb
)
521 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_INLINE_DATA
)
526 static inline int ocfs2_supports_xattr(struct ocfs2_super
*osb
)
528 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_XATTR
)
533 static inline int ocfs2_meta_ecc(struct ocfs2_super
*osb
)
535 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_META_ECC
)
540 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super
*osb
)
542 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS
)
547 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super
*osb
)
549 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG
)
554 static inline unsigned int ocfs2_link_max(struct ocfs2_super
*osb
)
556 if (ocfs2_supports_indexed_dirs(osb
))
557 return OCFS2_DX_LINK_MAX
;
558 return OCFS2_LINK_MAX
;
561 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode
*di
)
563 u32 nlink
= le16_to_cpu(di
->i_links_count
);
564 u32 hi
= le16_to_cpu(di
->i_links_count_hi
);
566 if (di
->i_dyn_features
& cpu_to_le16(OCFS2_INDEXED_DIR_FL
))
567 nlink
|= (hi
<< OCFS2_LINKS_HI_SHIFT
);
572 static inline void ocfs2_set_links_count(struct ocfs2_dinode
*di
, u32 nlink
)
577 hi
= nlink
>> OCFS2_LINKS_HI_SHIFT
;
579 di
->i_links_count
= cpu_to_le16(lo
);
580 di
->i_links_count_hi
= cpu_to_le16(hi
);
583 static inline void ocfs2_add_links_count(struct ocfs2_dinode
*di
, int n
)
585 u32 links
= ocfs2_read_links_count(di
);
589 ocfs2_set_links_count(di
, links
);
592 static inline int ocfs2_refcount_tree(struct ocfs2_super
*osb
)
594 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE
)
599 /* set / clear functions because cluster events can make these happen
600 * in parallel so we want the transitions to be atomic. this also
601 * means that any future flags osb_flags must be protected by spinlock
603 static inline void ocfs2_set_osb_flag(struct ocfs2_super
*osb
,
606 spin_lock(&osb
->osb_lock
);
607 osb
->osb_flags
|= flag
;
608 spin_unlock(&osb
->osb_lock
);
611 static inline void ocfs2_set_ro_flag(struct ocfs2_super
*osb
,
614 spin_lock(&osb
->osb_lock
);
615 osb
->osb_flags
&= ~(OCFS2_OSB_SOFT_RO
|OCFS2_OSB_HARD_RO
);
617 osb
->osb_flags
|= OCFS2_OSB_HARD_RO
;
619 osb
->osb_flags
|= OCFS2_OSB_SOFT_RO
;
620 spin_unlock(&osb
->osb_lock
);
623 static inline int ocfs2_is_hard_readonly(struct ocfs2_super
*osb
)
627 spin_lock(&osb
->osb_lock
);
628 ret
= osb
->osb_flags
& OCFS2_OSB_HARD_RO
;
629 spin_unlock(&osb
->osb_lock
);
634 static inline int ocfs2_is_soft_readonly(struct ocfs2_super
*osb
)
638 spin_lock(&osb
->osb_lock
);
639 ret
= osb
->osb_flags
& OCFS2_OSB_SOFT_RO
;
640 spin_unlock(&osb
->osb_lock
);
645 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super
*osb
)
647 return (osb
->s_feature_incompat
&
648 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK
|
649 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO
));
652 static inline int ocfs2_userspace_stack(struct ocfs2_super
*osb
)
654 if (ocfs2_clusterinfo_valid(osb
) &&
655 memcmp(osb
->osb_cluster_stack
, OCFS2_CLASSIC_CLUSTER_STACK
,
656 OCFS2_STACK_LABEL_LEN
))
661 static inline int ocfs2_o2cb_stack(struct ocfs2_super
*osb
)
663 if (ocfs2_clusterinfo_valid(osb
) &&
664 !memcmp(osb
->osb_cluster_stack
, OCFS2_CLASSIC_CLUSTER_STACK
,
665 OCFS2_STACK_LABEL_LEN
))
670 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super
*osb
)
672 return ocfs2_o2cb_stack(osb
) &&
673 (osb
->osb_stackflags
& OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT
);
676 static inline int ocfs2_mount_local(struct ocfs2_super
*osb
)
678 return ((osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT
)
679 || (osb
->s_mount_opt
& OCFS2_MOUNT_NOCLUSTER
));
682 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super
*osb
)
684 return (osb
->s_feature_incompat
&
685 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
);
689 #define OCFS2_IS_VALID_DINODE(ptr) \
690 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
692 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
693 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
695 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
696 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
699 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
700 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
702 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
703 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
705 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
706 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
708 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
709 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
711 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
712 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
714 static inline unsigned long ino_from_blkno(struct super_block
*sb
,
717 return (unsigned long)(blkno
& (u64
)ULONG_MAX
);
720 static inline u64
ocfs2_clusters_to_blocks(struct super_block
*sb
,
723 int c_to_b_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
724 sb
->s_blocksize_bits
;
726 return (u64
)clusters
<< c_to_b_bits
;
729 static inline u32
ocfs2_clusters_for_blocks(struct super_block
*sb
,
732 int b_to_c_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
733 sb
->s_blocksize_bits
;
735 blocks
+= (1 << b_to_c_bits
) - 1;
736 return (u32
)(blocks
>> b_to_c_bits
);
739 static inline u32
ocfs2_blocks_to_clusters(struct super_block
*sb
,
742 int b_to_c_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
743 sb
->s_blocksize_bits
;
745 return (u32
)(blocks
>> b_to_c_bits
);
748 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block
*sb
,
751 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
752 unsigned int clusters
;
754 bytes
+= OCFS2_SB(sb
)->s_clustersize
- 1;
755 /* OCFS2 just cannot have enough clusters to overflow this */
756 clusters
= (unsigned int)(bytes
>> cl_bits
);
761 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block
*sb
,
764 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
765 unsigned int clusters
;
767 clusters
= (unsigned int)(bytes
>> cl_bits
);
771 static inline u64
ocfs2_blocks_for_bytes(struct super_block
*sb
,
774 bytes
+= sb
->s_blocksize
- 1;
775 return bytes
>> sb
->s_blocksize_bits
;
778 static inline u64
ocfs2_clusters_to_bytes(struct super_block
*sb
,
781 return (u64
)clusters
<< OCFS2_SB(sb
)->s_clustersize_bits
;
784 static inline u64
ocfs2_block_to_cluster_start(struct super_block
*sb
,
787 int bits
= OCFS2_SB(sb
)->s_clustersize_bits
- sb
->s_blocksize_bits
;
788 unsigned int clusters
;
790 clusters
= ocfs2_blocks_to_clusters(sb
, blocks
);
791 return (u64
)clusters
<< bits
;
794 static inline u64
ocfs2_align_bytes_to_clusters(struct super_block
*sb
,
797 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
798 unsigned int clusters
;
800 clusters
= ocfs2_clusters_for_bytes(sb
, bytes
);
801 return (u64
)clusters
<< cl_bits
;
804 static inline u64
ocfs2_align_bytes_to_blocks(struct super_block
*sb
,
809 blocks
= ocfs2_blocks_for_bytes(sb
, bytes
);
810 return blocks
<< sb
->s_blocksize_bits
;
813 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes
)
815 return (unsigned long)((bytes
+ 511) >> 9);
818 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block
*sb
,
819 unsigned long pg_index
)
821 u32 clusters
= pg_index
;
822 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
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
);
833 * Find the 1st page index which covers the given clusters.
835 static inline pgoff_t
ocfs2_align_clusters_to_page_index(struct super_block
*sb
,
838 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
839 pgoff_t index
= clusters
;
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
);
850 static inline unsigned int ocfs2_pages_per_cluster(struct super_block
*sb
)
852 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
853 unsigned int pages_per_cluster
= 1;
855 if (PAGE_SHIFT
< cbits
)
856 pages_per_cluster
= 1 << (cbits
- PAGE_SHIFT
);
858 return pages_per_cluster
;
861 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block
*sb
,
864 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE
> 1048576);
866 return megs
<< (20 - OCFS2_SB(sb
)->s_clustersize_bits
);
869 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block
*sb
,
870 unsigned int clusters
)
872 return clusters
>> (20 - OCFS2_SB(sb
)->s_clustersize_bits
);
875 static inline void _ocfs2_set_bit(unsigned int bit
, unsigned long *bitmap
)
877 __set_bit_le(bit
, bitmap
);
879 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
881 static inline void _ocfs2_clear_bit(unsigned int bit
, unsigned long *bitmap
)
883 __clear_bit_le(bit
, bitmap
);
885 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
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
891 static inline void *correct_addr_and_bit_unaligned(int *bit
, void *addr
)
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);
900 #error "how many bits you are?!"
905 static inline void ocfs2_set_bit_unaligned(int bit
, void *bitmap
)
907 bitmap
= correct_addr_and_bit_unaligned(&bit
, bitmap
);
908 ocfs2_set_bit(bit
, bitmap
);
911 static inline void ocfs2_clear_bit_unaligned(int bit
, void *bitmap
)
913 bitmap
= correct_addr_and_bit_unaligned(&bit
, bitmap
);
914 ocfs2_clear_bit(bit
, bitmap
);
917 static inline int ocfs2_test_bit_unaligned(int bit
, void *bitmap
)
919 bitmap
= correct_addr_and_bit_unaligned(&bit
, bitmap
);
920 return ocfs2_test_bit(bit
, bitmap
);
923 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap
, int max
,
926 int fix
= 0, ret
, tmpmax
;
927 bitmap
= correct_addr_and_bit_unaligned(&fix
, bitmap
);
931 ret
= ocfs2_find_next_zero_bit(bitmap
, tmpmax
, start
) - fix
;