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/rbtree.h>
34 #include <linux/workqueue.h>
35 #include <linux/kref.h>
36 #include <linux/mutex.h>
37 #include <linux/jbd.h>
39 /* For union ocfs2_dlm_lksb */
40 #include "stackglue.h"
43 #include "ocfs2_lockid.h"
45 /* Most user visible OCFS2 inodes will have very few pieces of
46 * metadata, but larger files (including bitmaps, etc) must be taken
47 * into account when designing an access scheme. We allow a small
48 * amount of inlined blocks to be stored on an array and grow the
49 * structure into a rb tree when necessary. */
50 #define OCFS2_INODE_MAX_CACHE_ARRAY 2
52 struct ocfs2_caching_info
{
53 unsigned int ci_num_cached
;
55 sector_t ci_array
[OCFS2_INODE_MAX_CACHE_ARRAY
];
56 struct rb_root ci_tree
;
60 /* this limits us to 256 nodes
61 * if we need more, we can do a kmalloc for the map */
62 #define OCFS2_NODE_MAP_MAX_NODES 256
63 struct ocfs2_node_map
{
65 unsigned long map
[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES
)];
68 enum ocfs2_ast_action
{
69 OCFS2_AST_INVALID
= 0,
72 OCFS2_AST_DOWNCONVERT
,
75 /* actions for an unlockast function to take. */
76 enum ocfs2_unlock_action
{
77 OCFS2_UNLOCK_INVALID
= 0,
78 OCFS2_UNLOCK_CANCEL_CONVERT
,
79 OCFS2_UNLOCK_DROP_LOCK
,
82 /* ocfs2_lock_res->l_flags flags. */
83 #define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized
85 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
87 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
89 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
90 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
91 #define OCFS2_LOCK_REFRESHING (0x00000020)
92 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
93 * for shutdown paths */
94 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
95 * when to skip queueing
99 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
100 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
101 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
102 call to dlm_lock. Only
103 exists with BUSY set. */
105 struct ocfs2_lock_res_ops
;
107 typedef void (*ocfs2_lock_callback
)(int status
, unsigned long data
);
109 struct ocfs2_lock_res
{
111 struct ocfs2_lock_res_ops
*l_ops
;
114 struct list_head l_blocked_list
;
115 struct list_head l_mask_waiters
;
117 enum ocfs2_lock_type l_type
;
118 unsigned long l_flags
;
119 char l_name
[OCFS2_LOCK_ID_MAX_LEN
];
121 unsigned int l_ro_holders
;
122 unsigned int l_ex_holders
;
123 union ocfs2_dlm_lksb l_lksb
;
125 /* used from AST/BAST funcs. */
126 enum ocfs2_ast_action l_action
;
127 enum ocfs2_unlock_action l_unlock_action
;
130 unsigned int l_pending_gen
;
132 wait_queue_head_t l_event
;
134 struct list_head l_debug_list
;
136 #ifdef CONFIG_OCFS2_FS_STATS
137 unsigned long long l_lock_num_prmode
; /* PR acquires */
138 unsigned long long l_lock_num_exmode
; /* EX acquires */
139 unsigned int l_lock_num_prmode_failed
; /* Failed PR gets */
140 unsigned int l_lock_num_exmode_failed
; /* Failed EX gets */
141 unsigned long long l_lock_total_prmode
; /* Tot wait for PR */
142 unsigned long long l_lock_total_exmode
; /* Tot wait for EX */
143 unsigned int l_lock_max_prmode
; /* Max wait for PR */
144 unsigned int l_lock_max_exmode
; /* Max wait for EX */
145 unsigned int l_lock_refresh
; /* Disk refreshes */
149 struct ocfs2_dlm_debug
{
150 struct kref d_refcnt
;
151 struct dentry
*d_locking_state
;
152 struct list_head d_lockres_tracking
;
163 struct ocfs2_alloc_stats
167 atomic_t bitmap_data
;
172 enum ocfs2_local_alloc_state
174 OCFS2_LA_UNUSED
= 0, /* Local alloc will never be used for
175 * this mountpoint. */
176 OCFS2_LA_ENABLED
, /* Local alloc is in use. */
177 OCFS2_LA_THROTTLED
, /* Local alloc is in use, but number
178 * of bits has been reduced. */
179 OCFS2_LA_DISABLED
/* Local alloc has temporarily been
183 enum ocfs2_mount_options
185 OCFS2_MOUNT_HB_LOCAL
= 1 << 0, /* Heartbeat started in local mode */
186 OCFS2_MOUNT_BARRIER
= 1 << 1, /* Use block barriers */
187 OCFS2_MOUNT_NOINTR
= 1 << 2, /* Don't catch signals */
188 OCFS2_MOUNT_ERRORS_PANIC
= 1 << 3, /* Panic on errors */
189 OCFS2_MOUNT_DATA_WRITEBACK
= 1 << 4, /* No data ordering */
190 OCFS2_MOUNT_LOCALFLOCKS
= 1 << 5, /* No cluster aware user file locks */
191 OCFS2_MOUNT_NOUSERXATTR
= 1 << 6, /* No user xattr */
192 OCFS2_MOUNT_INODE64
= 1 << 7, /* Allow inode numbers > 2^32 */
195 #define OCFS2_OSB_SOFT_RO 0x0001
196 #define OCFS2_OSB_HARD_RO 0x0002
197 #define OCFS2_OSB_ERROR_FS 0x0004
198 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
200 struct ocfs2_journal
;
201 struct ocfs2_slot_info
;
202 struct ocfs2_recovery_map
;
205 struct task_struct
*commit_task
;
206 struct super_block
*sb
;
207 struct inode
*root_inode
;
208 struct inode
*sys_root_inode
;
209 struct inode
*system_inodes
[NUM_SYSTEM_INODES
];
211 struct ocfs2_slot_info
*slot_info
;
213 u32
*slot_recovery_generations
;
215 spinlock_t node_map_lock
;
218 u64 system_dir_blkno
;
225 u64 first_cluster_group_blkno
;
228 u32 s_feature_compat
;
229 u32 s_feature_incompat
;
230 u32 s_feature_ro_compat
;
232 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
233 * Could protect more on osb as it's very short lived.
236 u32 s_next_generation
;
237 unsigned long osb_flags
;
238 s16 s_inode_steal_slot
;
239 atomic_t s_num_inodes_stolen
;
241 unsigned long s_mount_opt
;
242 unsigned int s_atime_quantum
;
244 unsigned int max_slots
;
245 unsigned int node_num
;
250 int s_clustersize_bits
;
251 unsigned int s_xattr_inline_size
;
254 struct mutex recovery_lock
;
255 struct ocfs2_recovery_map
*recovery_map
;
256 struct task_struct
*recovery_thread_task
;
257 int disable_recovery
;
258 wait_queue_head_t checkpoint_event
;
259 atomic_t needs_checkpoint
;
260 struct ocfs2_journal
*journal
;
261 unsigned long osb_commit_interval
;
263 struct delayed_work la_enable_wq
;
266 * Must hold local alloc i_mutex and osb->osb_lock to change
267 * local_alloc_bits. Reads can be done under either lock.
269 unsigned int local_alloc_bits
;
270 unsigned int local_alloc_default_bits
;
272 enum ocfs2_local_alloc_state local_alloc_state
; /* protected
275 struct buffer_head
*local_alloc_bh
;
279 #ifdef CONFIG_OCFS2_FS_STATS
280 struct dentry
*local_alloc_debug
;
281 char *local_alloc_debug_buf
;
284 /* Next two fields are for local node slot recovery during
287 struct ocfs2_dinode
*local_alloc_copy
;
289 struct ocfs2_alloc_stats alloc_stats
;
290 char dev_str
[20]; /* "major,minor" of the device */
292 char osb_cluster_stack
[OCFS2_STACK_LABEL_LEN
+ 1];
293 struct ocfs2_cluster_connection
*cconn
;
294 struct ocfs2_lock_res osb_super_lockres
;
295 struct ocfs2_lock_res osb_rename_lockres
;
296 struct ocfs2_dlm_debug
*osb_dlm_debug
;
298 struct dentry
*osb_debug_root
;
300 wait_queue_head_t recovery_event
;
302 spinlock_t dc_task_lock
;
303 struct task_struct
*dc_task
;
304 wait_queue_head_t dc_event
;
305 unsigned long dc_wake_sequence
;
306 unsigned long dc_work_sequence
;
309 * Any thread can add locks to the list, but the downconvert
310 * thread is the only one allowed to remove locks. Any change
311 * to this rule requires updating
312 * ocfs2_downconvert_thread_do_work().
314 struct list_head blocked_lock_list
;
315 unsigned long blocked_lock_count
;
317 wait_queue_head_t osb_mount_event
;
319 /* Truncate log info */
320 struct inode
*osb_tl_inode
;
321 struct buffer_head
*osb_tl_bh
;
322 struct delayed_work osb_truncate_log_wq
;
324 struct ocfs2_node_map osb_recovering_orphan_dirs
;
325 unsigned int *osb_orphan_wipes
;
326 wait_queue_head_t osb_wipe_event
;
329 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
331 static inline int ocfs2_should_order_data(struct inode
*inode
)
333 if (!S_ISREG(inode
->i_mode
))
335 if (OCFS2_SB(inode
->i_sb
)->s_mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
)
340 static inline int ocfs2_sparse_alloc(struct ocfs2_super
*osb
)
342 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC
)
347 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super
*osb
)
350 * Support for sparse files is a pre-requisite
352 if (!ocfs2_sparse_alloc(osb
))
355 if (osb
->s_feature_ro_compat
& OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
)
360 static inline int ocfs2_supports_inline_data(struct ocfs2_super
*osb
)
362 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_INLINE_DATA
)
367 static inline int ocfs2_supports_xattr(struct ocfs2_super
*osb
)
369 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_XATTR
)
374 /* set / clear functions because cluster events can make these happen
375 * in parallel so we want the transitions to be atomic. this also
376 * means that any future flags osb_flags must be protected by spinlock
378 static inline void ocfs2_set_osb_flag(struct ocfs2_super
*osb
,
381 spin_lock(&osb
->osb_lock
);
382 osb
->osb_flags
|= flag
;
383 spin_unlock(&osb
->osb_lock
);
386 static inline void ocfs2_set_ro_flag(struct ocfs2_super
*osb
,
389 spin_lock(&osb
->osb_lock
);
390 osb
->osb_flags
&= ~(OCFS2_OSB_SOFT_RO
|OCFS2_OSB_HARD_RO
);
392 osb
->osb_flags
|= OCFS2_OSB_HARD_RO
;
394 osb
->osb_flags
|= OCFS2_OSB_SOFT_RO
;
395 spin_unlock(&osb
->osb_lock
);
398 static inline int ocfs2_is_hard_readonly(struct ocfs2_super
*osb
)
402 spin_lock(&osb
->osb_lock
);
403 ret
= osb
->osb_flags
& OCFS2_OSB_HARD_RO
;
404 spin_unlock(&osb
->osb_lock
);
409 static inline int ocfs2_is_soft_readonly(struct ocfs2_super
*osb
)
413 spin_lock(&osb
->osb_lock
);
414 ret
= osb
->osb_flags
& OCFS2_OSB_SOFT_RO
;
415 spin_unlock(&osb
->osb_lock
);
420 static inline int ocfs2_userspace_stack(struct ocfs2_super
*osb
)
422 return (osb
->s_feature_incompat
&
423 OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK
);
426 static inline int ocfs2_mount_local(struct ocfs2_super
*osb
)
428 return (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT
);
431 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super
*osb
)
433 return (osb
->s_feature_incompat
&
434 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
);
438 #define OCFS2_IS_VALID_DINODE(ptr) \
439 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
441 #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
442 typeof(__di) ____di = (__di); \
443 ocfs2_error((__sb), \
444 "Dinode # %llu has bad signature %.*s", \
445 (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \
446 (____di)->i_signature); \
449 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
450 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
452 #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
453 typeof(__eb) ____eb = (__eb); \
454 ocfs2_error((__sb), \
455 "Extent Block # %llu has bad signature %.*s", \
456 (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \
457 (____eb)->h_signature); \
460 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
461 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
463 #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
464 typeof(__gd) ____gd = (__gd); \
465 ocfs2_error((__sb), \
466 "Group Descriptor # %llu has bad signature %.*s", \
467 (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \
468 (____gd)->bg_signature); \
471 static inline unsigned long ino_from_blkno(struct super_block
*sb
,
474 return (unsigned long)(blkno
& (u64
)ULONG_MAX
);
477 static inline u64
ocfs2_clusters_to_blocks(struct super_block
*sb
,
480 int c_to_b_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
481 sb
->s_blocksize_bits
;
483 return (u64
)clusters
<< c_to_b_bits
;
486 static inline u32
ocfs2_blocks_to_clusters(struct super_block
*sb
,
489 int b_to_c_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
490 sb
->s_blocksize_bits
;
492 return (u32
)(blocks
>> b_to_c_bits
);
495 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block
*sb
,
498 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
499 unsigned int clusters
;
501 bytes
+= OCFS2_SB(sb
)->s_clustersize
- 1;
502 /* OCFS2 just cannot have enough clusters to overflow this */
503 clusters
= (unsigned int)(bytes
>> cl_bits
);
508 static inline u64
ocfs2_blocks_for_bytes(struct super_block
*sb
,
511 bytes
+= sb
->s_blocksize
- 1;
512 return bytes
>> sb
->s_blocksize_bits
;
515 static inline u64
ocfs2_clusters_to_bytes(struct super_block
*sb
,
518 return (u64
)clusters
<< OCFS2_SB(sb
)->s_clustersize_bits
;
521 static inline u64
ocfs2_align_bytes_to_clusters(struct super_block
*sb
,
524 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
525 unsigned int clusters
;
527 clusters
= ocfs2_clusters_for_bytes(sb
, bytes
);
528 return (u64
)clusters
<< cl_bits
;
531 static inline u64
ocfs2_align_bytes_to_blocks(struct super_block
*sb
,
536 blocks
= ocfs2_blocks_for_bytes(sb
, bytes
);
537 return blocks
<< sb
->s_blocksize_bits
;
540 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes
)
542 return (unsigned long)((bytes
+ 511) >> 9);
545 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block
*sb
,
546 unsigned long pg_index
)
548 u32 clusters
= pg_index
;
549 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
551 if (unlikely(PAGE_CACHE_SHIFT
> cbits
))
552 clusters
= pg_index
<< (PAGE_CACHE_SHIFT
- cbits
);
553 else if (PAGE_CACHE_SHIFT
< cbits
)
554 clusters
= pg_index
>> (cbits
- PAGE_CACHE_SHIFT
);
560 * Find the 1st page index which covers the given clusters.
562 static inline pgoff_t
ocfs2_align_clusters_to_page_index(struct super_block
*sb
,
565 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
566 pgoff_t index
= clusters
;
568 if (PAGE_CACHE_SHIFT
> cbits
) {
569 index
= (pgoff_t
)clusters
>> (PAGE_CACHE_SHIFT
- cbits
);
570 } else if (PAGE_CACHE_SHIFT
< cbits
) {
571 index
= (pgoff_t
)clusters
<< (cbits
- PAGE_CACHE_SHIFT
);
577 static inline unsigned int ocfs2_pages_per_cluster(struct super_block
*sb
)
579 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
580 unsigned int pages_per_cluster
= 1;
582 if (PAGE_CACHE_SHIFT
< cbits
)
583 pages_per_cluster
= 1 << (cbits
- PAGE_CACHE_SHIFT
);
585 return pages_per_cluster
;
588 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block
*sb
,
591 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE
> 1048576);
593 return megs
<< (20 - OCFS2_SB(sb
)->s_clustersize_bits
);
596 static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super
*osb
)
598 spin_lock(&osb
->osb_lock
);
599 osb
->s_inode_steal_slot
= OCFS2_INVALID_SLOT
;
600 spin_unlock(&osb
->osb_lock
);
601 atomic_set(&osb
->s_num_inodes_stolen
, 0);
604 static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super
*osb
,
607 spin_lock(&osb
->osb_lock
);
608 osb
->s_inode_steal_slot
= slot
;
609 spin_unlock(&osb
->osb_lock
);
612 static inline s16
ocfs2_get_inode_steal_slot(struct ocfs2_super
*osb
)
616 spin_lock(&osb
->osb_lock
);
617 slot
= osb
->s_inode_steal_slot
;
618 spin_unlock(&osb
->osb_lock
);
623 #define ocfs2_set_bit ext2_set_bit
624 #define ocfs2_clear_bit ext2_clear_bit
625 #define ocfs2_test_bit ext2_test_bit
626 #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit