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 #include "cluster/nodemanager.h"
40 #include "cluster/heartbeat.h"
41 #include "cluster/tcp.h"
43 #include "dlm/dlmapi.h"
46 #include "ocfs2_lockid.h"
48 /* Most user visible OCFS2 inodes will have very few pieces of
49 * metadata, but larger files (including bitmaps, etc) must be taken
50 * into account when designing an access scheme. We allow a small
51 * amount of inlined blocks to be stored on an array and grow the
52 * structure into a rb tree when necessary. */
53 #define OCFS2_INODE_MAX_CACHE_ARRAY 2
55 struct ocfs2_caching_info
{
56 unsigned int ci_num_cached
;
58 sector_t ci_array
[OCFS2_INODE_MAX_CACHE_ARRAY
];
59 struct rb_root ci_tree
;
63 /* this limits us to 256 nodes
64 * if we need more, we can do a kmalloc for the map */
65 #define OCFS2_NODE_MAP_MAX_NODES 256
66 struct ocfs2_node_map
{
68 unsigned long map
[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES
)];
71 enum ocfs2_ast_action
{
72 OCFS2_AST_INVALID
= 0,
75 OCFS2_AST_DOWNCONVERT
,
78 /* actions for an unlockast function to take. */
79 enum ocfs2_unlock_action
{
80 OCFS2_UNLOCK_INVALID
= 0,
81 OCFS2_UNLOCK_CANCEL_CONVERT
,
82 OCFS2_UNLOCK_DROP_LOCK
,
85 /* ocfs2_lock_res->l_flags flags. */
86 #define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized
88 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
90 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
92 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
93 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
94 #define OCFS2_LOCK_REFRESHING (0x00000020)
95 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
96 * for shutdown paths */
97 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
98 * when to skip queueing
102 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
103 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
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 struct dlm_lockstatus l_lksb
;
125 /* used from AST/BAST funcs. */
126 enum ocfs2_ast_action l_action
;
127 enum ocfs2_unlock_action l_unlock_action
;
131 wait_queue_head_t l_event
;
133 struct list_head l_debug_list
;
136 struct ocfs2_dlm_debug
{
137 struct kref d_refcnt
;
138 struct dentry
*d_locking_state
;
139 struct list_head d_lockres_tracking
;
150 struct ocfs2_alloc_stats
154 atomic_t bitmap_data
;
159 enum ocfs2_local_alloc_state
166 enum ocfs2_mount_options
168 OCFS2_MOUNT_HB_LOCAL
= 1 << 0, /* Heartbeat started in local mode */
169 OCFS2_MOUNT_BARRIER
= 1 << 1, /* Use block barriers */
170 OCFS2_MOUNT_NOINTR
= 1 << 2, /* Don't catch signals */
171 OCFS2_MOUNT_ERRORS_PANIC
= 1 << 3, /* Panic on errors */
172 OCFS2_MOUNT_DATA_WRITEBACK
= 1 << 4, /* No data ordering */
173 OCFS2_MOUNT_LOCALFLOCKS
= 1 << 5, /* No cluster aware user file locks */
176 #define OCFS2_OSB_SOFT_RO 0x0001
177 #define OCFS2_OSB_HARD_RO 0x0002
178 #define OCFS2_OSB_ERROR_FS 0x0004
179 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
181 struct ocfs2_journal
;
182 struct ocfs2_slot_info
;
183 struct ocfs2_recovery_map
;
186 struct task_struct
*commit_task
;
187 struct super_block
*sb
;
188 struct inode
*root_inode
;
189 struct inode
*sys_root_inode
;
190 struct inode
*system_inodes
[NUM_SYSTEM_INODES
];
192 struct ocfs2_slot_info
*slot_info
;
194 spinlock_t node_map_lock
;
197 u64 system_dir_blkno
;
203 u64 first_cluster_group_blkno
;
206 u32 s_feature_compat
;
207 u32 s_feature_incompat
;
208 u32 s_feature_ro_compat
;
210 /* Protects s_next_generaion, osb_flags. Could protect more on
211 * osb as it's very short lived. */
213 u32 s_next_generation
;
214 unsigned long osb_flags
;
216 unsigned long s_mount_opt
;
217 unsigned int s_atime_quantum
;
219 unsigned int max_slots
;
225 int s_clustersize_bits
;
228 struct mutex recovery_lock
;
229 struct ocfs2_recovery_map
*recovery_map
;
230 struct task_struct
*recovery_thread_task
;
231 int disable_recovery
;
232 wait_queue_head_t checkpoint_event
;
233 atomic_t needs_checkpoint
;
234 struct ocfs2_journal
*journal
;
235 unsigned long osb_commit_interval
;
237 int local_alloc_size
;
238 enum ocfs2_local_alloc_state local_alloc_state
;
239 struct buffer_head
*local_alloc_bh
;
242 /* Next two fields are for local node slot recovery during
245 struct ocfs2_dinode
*local_alloc_copy
;
247 struct ocfs2_alloc_stats alloc_stats
;
248 char dev_str
[20]; /* "major,minor" of the device */
250 struct dlm_ctxt
*dlm
;
251 struct ocfs2_lock_res osb_super_lockres
;
252 struct ocfs2_lock_res osb_rename_lockres
;
253 struct dlm_eviction_cb osb_eviction_cb
;
254 struct ocfs2_dlm_debug
*osb_dlm_debug
;
255 struct dlm_protocol_version osb_locking_proto
;
257 struct dentry
*osb_debug_root
;
259 wait_queue_head_t recovery_event
;
261 spinlock_t dc_task_lock
;
262 struct task_struct
*dc_task
;
263 wait_queue_head_t dc_event
;
264 unsigned long dc_wake_sequence
;
265 unsigned long dc_work_sequence
;
268 * Any thread can add locks to the list, but the downconvert
269 * thread is the only one allowed to remove locks. Any change
270 * to this rule requires updating
271 * ocfs2_downconvert_thread_do_work().
273 struct list_head blocked_lock_list
;
274 unsigned long blocked_lock_count
;
276 wait_queue_head_t osb_mount_event
;
278 /* Truncate log info */
279 struct inode
*osb_tl_inode
;
280 struct buffer_head
*osb_tl_bh
;
281 struct delayed_work osb_truncate_log_wq
;
283 struct ocfs2_node_map osb_recovering_orphan_dirs
;
284 unsigned int *osb_orphan_wipes
;
285 wait_queue_head_t osb_wipe_event
;
288 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
290 static inline int ocfs2_should_order_data(struct inode
*inode
)
292 if (!S_ISREG(inode
->i_mode
))
294 if (OCFS2_SB(inode
->i_sb
)->s_mount_opt
& OCFS2_MOUNT_DATA_WRITEBACK
)
299 static inline int ocfs2_sparse_alloc(struct ocfs2_super
*osb
)
301 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC
)
306 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super
*osb
)
309 * Support for sparse files is a pre-requisite
311 if (!ocfs2_sparse_alloc(osb
))
314 if (osb
->s_feature_ro_compat
& OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
)
319 static inline int ocfs2_supports_inline_data(struct ocfs2_super
*osb
)
321 if (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_INLINE_DATA
)
326 /* set / clear functions because cluster events can make these happen
327 * in parallel so we want the transitions to be atomic. this also
328 * means that any future flags osb_flags must be protected by spinlock
330 static inline void ocfs2_set_osb_flag(struct ocfs2_super
*osb
,
333 spin_lock(&osb
->osb_lock
);
334 osb
->osb_flags
|= flag
;
335 spin_unlock(&osb
->osb_lock
);
338 static inline void ocfs2_set_ro_flag(struct ocfs2_super
*osb
,
341 spin_lock(&osb
->osb_lock
);
342 osb
->osb_flags
&= ~(OCFS2_OSB_SOFT_RO
|OCFS2_OSB_HARD_RO
);
344 osb
->osb_flags
|= OCFS2_OSB_HARD_RO
;
346 osb
->osb_flags
|= OCFS2_OSB_SOFT_RO
;
347 spin_unlock(&osb
->osb_lock
);
350 static inline int ocfs2_is_hard_readonly(struct ocfs2_super
*osb
)
354 spin_lock(&osb
->osb_lock
);
355 ret
= osb
->osb_flags
& OCFS2_OSB_HARD_RO
;
356 spin_unlock(&osb
->osb_lock
);
361 static inline int ocfs2_is_soft_readonly(struct ocfs2_super
*osb
)
365 spin_lock(&osb
->osb_lock
);
366 ret
= osb
->osb_flags
& OCFS2_OSB_SOFT_RO
;
367 spin_unlock(&osb
->osb_lock
);
372 static inline int ocfs2_mount_local(struct ocfs2_super
*osb
)
374 return (osb
->s_feature_incompat
& OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT
);
377 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super
*osb
)
379 return (osb
->s_feature_incompat
&
380 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
);
384 #define OCFS2_IS_VALID_DINODE(ptr) \
385 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
387 #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
388 typeof(__di) ____di = (__di); \
389 ocfs2_error((__sb), \
390 "Dinode # %llu has bad signature %.*s", \
391 (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \
392 (____di)->i_signature); \
395 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
396 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
398 #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
399 typeof(__eb) ____eb = (__eb); \
400 ocfs2_error((__sb), \
401 "Extent Block # %llu has bad signature %.*s", \
402 (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \
403 (____eb)->h_signature); \
406 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
407 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
409 #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
410 typeof(__gd) ____gd = (__gd); \
411 ocfs2_error((__sb), \
412 "Group Descriptor # %llu has bad signature %.*s", \
413 (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \
414 (____gd)->bg_signature); \
417 static inline unsigned long ino_from_blkno(struct super_block
*sb
,
420 return (unsigned long)(blkno
& (u64
)ULONG_MAX
);
423 static inline u64
ocfs2_clusters_to_blocks(struct super_block
*sb
,
426 int c_to_b_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
427 sb
->s_blocksize_bits
;
429 return (u64
)clusters
<< c_to_b_bits
;
432 static inline u32
ocfs2_blocks_to_clusters(struct super_block
*sb
,
435 int b_to_c_bits
= OCFS2_SB(sb
)->s_clustersize_bits
-
436 sb
->s_blocksize_bits
;
438 return (u32
)(blocks
>> b_to_c_bits
);
441 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block
*sb
,
444 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
445 unsigned int clusters
;
447 bytes
+= OCFS2_SB(sb
)->s_clustersize
- 1;
448 /* OCFS2 just cannot have enough clusters to overflow this */
449 clusters
= (unsigned int)(bytes
>> cl_bits
);
454 static inline u64
ocfs2_blocks_for_bytes(struct super_block
*sb
,
457 bytes
+= sb
->s_blocksize
- 1;
458 return bytes
>> sb
->s_blocksize_bits
;
461 static inline u64
ocfs2_clusters_to_bytes(struct super_block
*sb
,
464 return (u64
)clusters
<< OCFS2_SB(sb
)->s_clustersize_bits
;
467 static inline u64
ocfs2_align_bytes_to_clusters(struct super_block
*sb
,
470 int cl_bits
= OCFS2_SB(sb
)->s_clustersize_bits
;
471 unsigned int clusters
;
473 clusters
= ocfs2_clusters_for_bytes(sb
, bytes
);
474 return (u64
)clusters
<< cl_bits
;
477 static inline u64
ocfs2_align_bytes_to_blocks(struct super_block
*sb
,
482 blocks
= ocfs2_blocks_for_bytes(sb
, bytes
);
483 return blocks
<< sb
->s_blocksize_bits
;
486 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes
)
488 return (unsigned long)((bytes
+ 511) >> 9);
491 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block
*sb
,
492 unsigned long pg_index
)
494 u32 clusters
= pg_index
;
495 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
497 if (unlikely(PAGE_CACHE_SHIFT
> cbits
))
498 clusters
= pg_index
<< (PAGE_CACHE_SHIFT
- cbits
);
499 else if (PAGE_CACHE_SHIFT
< cbits
)
500 clusters
= pg_index
>> (cbits
- PAGE_CACHE_SHIFT
);
506 * Find the 1st page index which covers the given clusters.
508 static inline pgoff_t
ocfs2_align_clusters_to_page_index(struct super_block
*sb
,
511 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
512 pgoff_t index
= clusters
;
514 if (PAGE_CACHE_SHIFT
> cbits
) {
515 index
= (pgoff_t
)clusters
>> (PAGE_CACHE_SHIFT
- cbits
);
516 } else if (PAGE_CACHE_SHIFT
< cbits
) {
517 index
= (pgoff_t
)clusters
<< (cbits
- PAGE_CACHE_SHIFT
);
523 static inline unsigned int ocfs2_pages_per_cluster(struct super_block
*sb
)
525 unsigned int cbits
= OCFS2_SB(sb
)->s_clustersize_bits
;
526 unsigned int pages_per_cluster
= 1;
528 if (PAGE_CACHE_SHIFT
< cbits
)
529 pages_per_cluster
= 1 << (cbits
- PAGE_CACHE_SHIFT
);
531 return pages_per_cluster
;
534 #define ocfs2_set_bit ext2_set_bit
535 #define ocfs2_clear_bit ext2_clear_bit
536 #define ocfs2_test_bit ext2_test_bit
537 #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit