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
179 enum ocfs2_mount_options
181 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */
182 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
183 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
184 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
185 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
186 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
189 #define OCFS2_OSB_SOFT_RO 0x0001
190 #define OCFS2_OSB_HARD_RO 0x0002
191 #define OCFS2_OSB_ERROR_FS 0x0004
192 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
194 struct ocfs2_journal;
195 struct ocfs2_slot_info;
196 struct ocfs2_recovery_map;
199 struct task_struct *commit_task;
200 struct super_block *sb;
201 struct inode *root_inode;
202 struct inode *sys_root_inode;
203 struct inode *system_inodes[NUM_SYSTEM_INODES];
205 struct ocfs2_slot_info *slot_info;
207 spinlock_t node_map_lock;
210 u64 system_dir_blkno;
216 u64 first_cluster_group_blkno;
219 u32 s_feature_compat;
220 u32 s_feature_incompat;
221 u32 s_feature_ro_compat;
223 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
224 * Could protect more on osb as it's very short lived.
227 u32 s_next_generation;
228 unsigned long osb_flags;
229 s16 s_inode_steal_slot;
230 atomic_t s_num_inodes_stolen;
232 unsigned long s_mount_opt;
233 unsigned int s_atime_quantum;
235 unsigned int max_slots;
236 unsigned int node_num;
241 int s_clustersize_bits;
244 struct mutex recovery_lock;
245 struct ocfs2_recovery_map *recovery_map;
246 struct task_struct *recovery_thread_task;
247 int disable_recovery;
248 wait_queue_head_t checkpoint_event;
249 atomic_t needs_checkpoint;
250 struct ocfs2_journal *journal;
251 unsigned long osb_commit_interval;
253 int local_alloc_size;
254 enum ocfs2_local_alloc_state local_alloc_state;
255 struct buffer_head *local_alloc_bh;
258 /* Next two fields are for local node slot recovery during
261 struct ocfs2_dinode *local_alloc_copy;
263 struct ocfs2_alloc_stats alloc_stats;
264 char dev_str[20]; /* "major,minor" of the device */
266 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
267 struct ocfs2_cluster_connection *cconn;
268 struct ocfs2_lock_res osb_super_lockres;
269 struct ocfs2_lock_res osb_rename_lockres;
270 struct ocfs2_dlm_debug *osb_dlm_debug;
272 struct dentry *osb_debug_root;
274 wait_queue_head_t recovery_event;
276 spinlock_t dc_task_lock;
277 struct task_struct *dc_task;
278 wait_queue_head_t dc_event;
279 unsigned long dc_wake_sequence;
280 unsigned long dc_work_sequence;
283 * Any thread can add locks to the list, but the downconvert
284 * thread is the only one allowed to remove locks. Any change
285 * to this rule requires updating
286 * ocfs2_downconvert_thread_do_work().
288 struct list_head blocked_lock_list;
289 unsigned long blocked_lock_count;
291 wait_queue_head_t osb_mount_event;
293 /* Truncate log info */
294 struct inode *osb_tl_inode;
295 struct buffer_head *osb_tl_bh;
296 struct delayed_work osb_truncate_log_wq;
298 struct ocfs2_node_map osb_recovering_orphan_dirs;
299 unsigned int *osb_orphan_wipes;
300 wait_queue_head_t osb_wipe_event;
303 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
305 static inline int ocfs2_should_order_data(struct inode *inode)
307 if (!S_ISREG(inode->i_mode))
309 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
314 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
316 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
321 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
324 * Support for sparse files is a pre-requisite
326 if (!ocfs2_sparse_alloc(osb))
329 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
334 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
336 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
341 /* set / clear functions because cluster events can make these happen
342 * in parallel so we want the transitions to be atomic. this also
343 * means that any future flags osb_flags must be protected by spinlock
345 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
348 spin_lock(&osb->osb_lock);
349 osb->osb_flags |= flag;
350 spin_unlock(&osb->osb_lock);
353 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
356 spin_lock(&osb->osb_lock);
357 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
359 osb->osb_flags |= OCFS2_OSB_HARD_RO;
361 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
362 spin_unlock(&osb->osb_lock);
365 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
369 spin_lock(&osb->osb_lock);
370 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
371 spin_unlock(&osb->osb_lock);
376 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
380 spin_lock(&osb->osb_lock);
381 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
382 spin_unlock(&osb->osb_lock);
387 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
389 return (osb->s_feature_incompat &
390 OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK);
393 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
395 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
398 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
400 return (osb->s_feature_incompat &
401 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
405 #define OCFS2_IS_VALID_DINODE(ptr) \
406 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
408 #define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
409 typeof(__di) ____di = (__di); \
410 ocfs2_error((__sb), \
411 "Dinode # %llu has bad signature %.*s", \
412 (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \
413 (____di)->i_signature); \
416 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
417 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
419 #define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
420 typeof(__eb) ____eb = (__eb); \
421 ocfs2_error((__sb), \
422 "Extent Block # %llu has bad signature %.*s", \
423 (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \
424 (____eb)->h_signature); \
427 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
428 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
430 #define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
431 typeof(__gd) ____gd = (__gd); \
432 ocfs2_error((__sb), \
433 "Group Descriptor # %llu has bad signature %.*s", \
434 (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \
435 (____gd)->bg_signature); \
438 static inline unsigned long ino_from_blkno(struct super_block *sb,
441 return (unsigned long)(blkno & (u64)ULONG_MAX);
444 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
447 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
448 sb->s_blocksize_bits;
450 return (u64)clusters << c_to_b_bits;
453 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
456 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
457 sb->s_blocksize_bits;
459 return (u32)(blocks >> b_to_c_bits);
462 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
465 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
466 unsigned int clusters;
468 bytes += OCFS2_SB(sb)->s_clustersize - 1;
469 /* OCFS2 just cannot have enough clusters to overflow this */
470 clusters = (unsigned int)(bytes >> cl_bits);
475 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
478 bytes += sb->s_blocksize - 1;
479 return bytes >> sb->s_blocksize_bits;
482 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
485 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
488 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
491 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
492 unsigned int clusters;
494 clusters = ocfs2_clusters_for_bytes(sb, bytes);
495 return (u64)clusters << cl_bits;
498 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
503 blocks = ocfs2_blocks_for_bytes(sb, bytes);
504 return blocks << sb->s_blocksize_bits;
507 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
509 return (unsigned long)((bytes + 511) >> 9);
512 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
513 unsigned long pg_index)
515 u32 clusters = pg_index;
516 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
518 if (unlikely(PAGE_CACHE_SHIFT > cbits))
519 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
520 else if (PAGE_CACHE_SHIFT < cbits)
521 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
527 * Find the 1st page index which covers the given clusters.
529 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
532 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
533 pgoff_t index = clusters;
535 if (PAGE_CACHE_SHIFT > cbits) {
536 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
537 } else if (PAGE_CACHE_SHIFT < cbits) {
538 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
544 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
546 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
547 unsigned int pages_per_cluster = 1;
549 if (PAGE_CACHE_SHIFT < cbits)
550 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
552 return pages_per_cluster;
555 static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
557 spin_lock(&osb->osb_lock);
558 osb->s_inode_steal_slot = OCFS2_INVALID_SLOT;
559 spin_unlock(&osb->osb_lock);
560 atomic_set(&osb->s_num_inodes_stolen, 0);
563 static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb,
566 spin_lock(&osb->osb_lock);
567 osb->s_inode_steal_slot = slot;
568 spin_unlock(&osb->osb_lock);
571 static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb)
575 spin_lock(&osb->osb_lock);
576 slot = osb->s_inode_steal_slot;
577 spin_unlock(&osb->osb_lock);
582 #define ocfs2_set_bit ext2_set_bit
583 #define ocfs2_clear_bit ext2_clear_bit
584 #define ocfs2_test_bit ext2_test_bit
585 #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit