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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * ocfs2.h | |
5 | * | |
6 | * Defines macros and structures used in OCFS2 | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
9 | * | |
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. | |
14 | * | |
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. | |
19 | * | |
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. | |
24 | */ | |
25 | ||
26 | #ifndef OCFS2_H | |
27 | #define OCFS2_H | |
28 | ||
29 | #include <linux/spinlock.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/wait.h> | |
32 | #include <linux/list.h> | |
e3a767b6 | 33 | #include <linux/llist.h> |
ccd979bd MF |
34 | #include <linux/rbtree.h> |
35 | #include <linux/workqueue.h> | |
36 | #include <linux/kref.h> | |
c74ec2f7 | 37 | #include <linux/mutex.h> |
cb25797d | 38 | #include <linux/lockdep.h> |
7aee47b0 | 39 | #include <linux/jbd2.h> |
ccd979bd | 40 | |
8f2c9c1b JB |
41 | /* For union ocfs2_dlm_lksb */ |
42 | #include "stackglue.h" | |
ccd979bd MF |
43 | |
44 | #include "ocfs2_fs.h" | |
ccd979bd | 45 | #include "ocfs2_lockid.h" |
9df5778e | 46 | #include "ocfs2_ioctl.h" |
ccd979bd | 47 | |
73be192b JB |
48 | /* For struct ocfs2_blockcheck_stats */ |
49 | #include "blockcheck.h" | |
50 | ||
d02f00cc | 51 | #include "reservations.h" |
47460d65 JB |
52 | |
53 | /* Caching of metadata buffers */ | |
54 | ||
ccd979bd MF |
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. */ | |
47460d65 JB |
60 | #define OCFS2_CACHE_INFO_MAX_ARRAY 2 |
61 | ||
62 | /* Flags for ocfs2_caching_info */ | |
63 | ||
64 | enum ocfs2_caching_info_flags { | |
65 | /* Indicates that the metadata cache is using the inline array */ | |
66 | OCFS2_CACHE_FL_INLINE = 1<<1, | |
67 | }; | |
ccd979bd | 68 | |
6e5a3d75 | 69 | struct ocfs2_caching_operations; |
ccd979bd | 70 | struct ocfs2_caching_info { |
47460d65 JB |
71 | /* |
72 | * The parent structure provides the locks, but because the | |
6e5a3d75 JB |
73 | * parent structure can differ, it provides locking operations |
74 | * to struct ocfs2_caching_info. | |
47460d65 | 75 | */ |
6e5a3d75 | 76 | const struct ocfs2_caching_operations *ci_ops; |
47460d65 | 77 | |
292dd27e JB |
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; | |
66fb345d JB |
81 | /* last transaction we were a part of. */ |
82 | unsigned long ci_last_trans; | |
83 | ||
84 | /* Cache structures */ | |
47460d65 | 85 | unsigned int ci_flags; |
ccd979bd MF |
86 | unsigned int ci_num_cached; |
87 | union { | |
47460d65 | 88 | sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; |
ccd979bd MF |
89 | struct rb_root ci_tree; |
90 | } ci_cache; | |
91 | }; | |
0cf2f763 JB |
92 | /* |
93 | * Need this prototype here instead of in uptodate.h because journal.h | |
94 | * uses it. | |
95 | */ | |
96 | struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); | |
ccd979bd MF |
97 | |
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 { | |
102 | u16 num_nodes; | |
103 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
104 | }; | |
105 | ||
106 | enum ocfs2_ast_action { | |
107 | OCFS2_AST_INVALID = 0, | |
108 | OCFS2_AST_ATTACH, | |
109 | OCFS2_AST_CONVERT, | |
110 | OCFS2_AST_DOWNCONVERT, | |
111 | }; | |
112 | ||
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, | |
118 | }; | |
119 | ||
120 | /* ocfs2_lock_res->l_flags flags. */ | |
3b5da018 | 121 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
ccd979bd MF |
122 | * the lvb */ |
123 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
124 | * dlm_lock */ | |
125 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
126 | * downconvert*/ | |
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 | |
135 | * about to be | |
136 | * dropped. */ | |
137 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 138 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
139 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
140 | call to dlm_lock. Only | |
141 | exists with BUSY set. */ | |
a1912826 SM |
142 | #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread |
143 | * from downconverting | |
144 | * before the upconvert | |
145 | * has completed */ | |
ccd979bd | 146 | |
d1e78238 X |
147 | #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster |
148 | * lock has already | |
149 | * returned, do not block | |
150 | * dc thread from | |
151 | * downconverting */ | |
152 | ||
ccd979bd MF |
153 | struct ocfs2_lock_res_ops; |
154 | ||
155 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
156 | ||
5bc970e8 SM |
157 | #ifdef CONFIG_OCFS2_FS_STATS |
158 | struct ocfs2_lock_stats { | |
159 | u64 ls_total; /* Total wait in NSEC */ | |
160 | u32 ls_gets; /* Num acquires */ | |
161 | u32 ls_fail; /* Num failed acquires */ | |
162 | ||
163 | /* Storing max wait in usecs saves 24 bytes per inode */ | |
164 | u32 ls_max; /* Max wait in USEC */ | |
165 | }; | |
166 | #endif | |
167 | ||
ccd979bd MF |
168 | struct ocfs2_lock_res { |
169 | void *l_priv; | |
170 | struct ocfs2_lock_res_ops *l_ops; | |
83fd9c7f | 171 | |
ccd979bd MF |
172 | |
173 | struct list_head l_blocked_list; | |
174 | struct list_head l_mask_waiters; | |
439a36b8 | 175 | struct list_head l_holders; |
ccd979bd | 176 | |
ccd979bd MF |
177 | unsigned long l_flags; |
178 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
ccd979bd MF |
179 | unsigned int l_ro_holders; |
180 | unsigned int l_ex_holders; | |
a2a2f552 MM |
181 | signed char l_level; |
182 | signed char l_requested; | |
183 | signed char l_blocking; | |
83fd9c7f GR |
184 | |
185 | /* Data packed - type enum ocfs2_lock_type */ | |
186 | unsigned char l_type; | |
ccd979bd MF |
187 | |
188 | /* used from AST/BAST funcs. */ | |
83fd9c7f GR |
189 | /* Data packed - enum type ocfs2_ast_action */ |
190 | unsigned char l_action; | |
191 | /* Data packed - enum type ocfs2_unlock_action */ | |
192 | unsigned char l_unlock_action; | |
de551246 | 193 | unsigned int l_pending_gen; |
ccd979bd | 194 | |
83fd9c7f GR |
195 | spinlock_t l_lock; |
196 | ||
197 | struct ocfs2_dlm_lksb l_lksb; | |
198 | ||
ccd979bd MF |
199 | wait_queue_head_t l_event; |
200 | ||
201 | struct list_head l_debug_list; | |
8ddb7b00 SM |
202 | |
203 | #ifdef CONFIG_OCFS2_FS_STATS | |
5bc970e8 SM |
204 | struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ |
205 | u32 l_lock_refresh; /* Disk refreshes */ | |
206 | struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ | |
8ddb7b00 | 207 | #endif |
cb25797d JK |
208 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
209 | struct lockdep_map l_lockdep_map; | |
210 | #endif | |
ccd979bd MF |
211 | }; |
212 | ||
ed460cff JQ |
213 | enum ocfs2_orphan_reco_type { |
214 | ORPHAN_NO_NEED_TRUNCATE = 0, | |
215 | ORPHAN_NEED_TRUNCATE, | |
216 | }; | |
217 | ||
692684e1 SM |
218 | enum ocfs2_orphan_scan_state { |
219 | ORPHAN_SCAN_ACTIVE, | |
220 | ORPHAN_SCAN_INACTIVE | |
221 | }; | |
222 | ||
83273932 SE |
223 | struct ocfs2_orphan_scan { |
224 | struct mutex os_lock; | |
225 | struct ocfs2_super *os_osb; | |
226 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ | |
227 | struct delayed_work os_orphan_scan_work; | |
395627b0 | 228 | time64_t os_scantime; /* time this node ran the scan */ |
15633a22 SE |
229 | u32 os_count; /* tracks node specific scans */ |
230 | u32 os_seqno; /* tracks cluster wide scans */ | |
692684e1 | 231 | atomic_t os_state; /* ACTIVE or INACTIVE */ |
83273932 SE |
232 | }; |
233 | ||
ccd979bd MF |
234 | struct ocfs2_dlm_debug { |
235 | struct kref d_refcnt; | |
236 | struct dentry *d_locking_state; | |
237 | struct list_head d_lockres_tracking; | |
238 | }; | |
239 | ||
240 | enum ocfs2_vol_state | |
241 | { | |
242 | VOLUME_INIT = 0, | |
243 | VOLUME_MOUNTED, | |
19ece546 | 244 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
245 | VOLUME_DISMOUNTED, |
246 | VOLUME_DISABLED | |
247 | }; | |
248 | ||
249 | struct ocfs2_alloc_stats | |
250 | { | |
251 | atomic_t moves; | |
252 | atomic_t local_data; | |
253 | atomic_t bitmap_data; | |
254 | atomic_t bg_allocs; | |
255 | atomic_t bg_extends; | |
256 | }; | |
257 | ||
258 | enum ocfs2_local_alloc_state | |
259 | { | |
9c7af40b MF |
260 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
261 | * this mountpoint. */ | |
262 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
263 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
264 | * of bits has been reduced. */ | |
265 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
266 | * disabled. */ | |
ccd979bd MF |
267 | }; |
268 | ||
269 | enum ocfs2_mount_options | |
270 | { | |
2c442719 | 271 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ |
ccd979bd MF |
272 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ |
273 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
274 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
275 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 276 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 277 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 278 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
5297aad8 JK |
279 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ |
280 | OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access | |
281 | control lists */ | |
282 | OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ | |
283 | OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ | |
fc371891 JB |
284 | OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT |
285 | writes */ | |
286 | OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ | |
287 | OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ | |
1dfeb768 | 288 | |
289 | OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */ | |
7d0fb914 GR |
290 | OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */ |
291 | OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */ | |
ccd979bd MF |
292 | }; |
293 | ||
8ed6b237 GR |
294 | #define OCFS2_OSB_SOFT_RO 0x0001 |
295 | #define OCFS2_OSB_HARD_RO 0x0002 | |
296 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
297 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 | |
ccd979bd MF |
298 | |
299 | struct ocfs2_journal; | |
d85b20e4 | 300 | struct ocfs2_slot_info; |
553abd04 | 301 | struct ocfs2_recovery_map; |
9140db04 | 302 | struct ocfs2_replay_map; |
2205363d | 303 | struct ocfs2_quota_recovery; |
ccd979bd MF |
304 | struct ocfs2_super |
305 | { | |
ccd979bd MF |
306 | struct task_struct *commit_task; |
307 | struct super_block *sb; | |
308 | struct inode *root_inode; | |
309 | struct inode *sys_root_inode; | |
b4d693fc TM |
310 | struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; |
311 | struct inode **local_system_inodes; | |
ccd979bd MF |
312 | |
313 | struct ocfs2_slot_info *slot_info; | |
314 | ||
539d8264 SM |
315 | u32 *slot_recovery_generations; |
316 | ||
ccd979bd | 317 | spinlock_t node_map_lock; |
ccd979bd | 318 | |
ccd979bd MF |
319 | u64 root_blkno; |
320 | u64 system_dir_blkno; | |
321 | u64 bitmap_blkno; | |
322 | u32 bitmap_cpg; | |
323 | u8 *uuid; | |
324 | char *uuid_str; | |
cf1d6c76 | 325 | u32 uuid_hash; |
ccd979bd MF |
326 | u8 *vol_label; |
327 | u64 first_cluster_group_blkno; | |
328 | u32 fs_generation; | |
329 | ||
330 | u32 s_feature_compat; | |
331 | u32 s_feature_incompat; | |
332 | u32 s_feature_ro_compat; | |
333 | ||
4d0ddb2c TM |
334 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
335 | * Could protect more on osb as it's very short lived. | |
336 | */ | |
ccd979bd MF |
337 | spinlock_t osb_lock; |
338 | u32 s_next_generation; | |
339 | unsigned long osb_flags; | |
4d0ddb2c | 340 | s16 s_inode_steal_slot; |
b89c5428 | 341 | s16 s_meta_steal_slot; |
4d0ddb2c | 342 | atomic_t s_num_inodes_stolen; |
b89c5428 | 343 | atomic_t s_num_meta_stolen; |
ccd979bd MF |
344 | |
345 | unsigned long s_mount_opt; | |
7f1a37e3 | 346 | unsigned int s_atime_quantum; |
ccd979bd | 347 | |
fc881fa0 | 348 | unsigned int max_slots; |
19fdb624 | 349 | unsigned int node_num; |
fc881fa0 JB |
350 | int slot_num; |
351 | int preferred_slot; | |
ccd979bd MF |
352 | int s_sectsize_bits; |
353 | int s_clustersize; | |
354 | int s_clustersize_bits; | |
fdd77704 | 355 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
356 | |
357 | atomic_t vol_state; | |
c74ec2f7 | 358 | struct mutex recovery_lock; |
553abd04 | 359 | struct ocfs2_recovery_map *recovery_map; |
9140db04 | 360 | struct ocfs2_replay_map *replay_map; |
ccd979bd MF |
361 | struct task_struct *recovery_thread_task; |
362 | int disable_recovery; | |
363 | wait_queue_head_t checkpoint_event; | |
ccd979bd | 364 | struct ocfs2_journal *journal; |
d147b3d6 | 365 | unsigned long osb_commit_interval; |
ccd979bd | 366 | |
9c7af40b MF |
367 | struct delayed_work la_enable_wq; |
368 | ||
369 | /* | |
370 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
371 | * local_alloc_bits. Reads can be done under either lock. | |
372 | */ | |
ebcee4b5 | 373 | unsigned int local_alloc_bits; |
9c7af40b | 374 | unsigned int local_alloc_default_bits; |
6b82021b MF |
375 | /* osb_clusters_at_boot can become stale! Do not trust it to |
376 | * be up to date. */ | |
377 | unsigned int osb_clusters_at_boot; | |
9c7af40b MF |
378 | |
379 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
380 | * by osb_lock */ | |
381 | ||
ccd979bd | 382 | struct buffer_head *local_alloc_bh; |
9c7af40b | 383 | |
883d4cae | 384 | u64 la_last_gd; |
ccd979bd | 385 | |
d02f00cc MF |
386 | struct ocfs2_reservation_map osb_la_resmap; |
387 | ||
388 | unsigned int osb_resv_level; | |
83f92318 | 389 | unsigned int osb_dir_resv_level; |
d02f00cc | 390 | |
2205363d | 391 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
392 | * mount. */ |
393 | int dirty; | |
394 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 395 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd | 396 | |
73be192b | 397 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
ccd979bd MF |
398 | struct ocfs2_alloc_stats alloc_stats; |
399 | char dev_str[20]; /* "major,minor" of the device */ | |
400 | ||
98f486f2 SM |
401 | u8 osb_stackflags; |
402 | ||
b61817e1 | 403 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
c74a3bdd | 404 | char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1]; |
4670c46d | 405 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
406 | struct ocfs2_lock_res osb_super_lockres; |
407 | struct ocfs2_lock_res osb_rename_lockres; | |
6ca497a8 | 408 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
ccd979bd MF |
409 | struct ocfs2_dlm_debug *osb_dlm_debug; |
410 | ||
411 | struct dentry *osb_debug_root; | |
50397507 | 412 | struct dentry *osb_ctxt; |
ccd979bd MF |
413 | |
414 | wait_queue_head_t recovery_event; | |
415 | ||
34d024f8 MF |
416 | spinlock_t dc_task_lock; |
417 | struct task_struct *dc_task; | |
418 | wait_queue_head_t dc_event; | |
419 | unsigned long dc_wake_sequence; | |
420 | unsigned long dc_work_sequence; | |
ccd979bd | 421 | |
7ec373cf MF |
422 | /* |
423 | * Any thread can add locks to the list, but the downconvert | |
424 | * thread is the only one allowed to remove locks. Any change | |
425 | * to this rule requires updating | |
426 | * ocfs2_downconvert_thread_do_work(). | |
427 | */ | |
ccd979bd MF |
428 | struct list_head blocked_lock_list; |
429 | unsigned long blocked_lock_count; | |
430 | ||
e3a767b6 JK |
431 | /* List of dquot structures to drop last reference to */ |
432 | struct llist_head dquot_drop_list; | |
433 | struct work_struct dquot_drop_work; | |
434 | ||
ccd979bd MF |
435 | wait_queue_head_t osb_mount_event; |
436 | ||
437 | /* Truncate log info */ | |
438 | struct inode *osb_tl_inode; | |
439 | struct buffer_head *osb_tl_bh; | |
c4028958 | 440 | struct delayed_work osb_truncate_log_wq; |
a9e9acae | 441 | atomic_t osb_tl_disable; |
50308d81 TM |
442 | /* |
443 | * How many clusters in our truncate log. | |
444 | * It must be protected by osb_tl_inode->i_mutex. | |
445 | */ | |
446 | unsigned int truncated_clusters; | |
b4df6ed8 MF |
447 | |
448 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
449 | unsigned int *osb_orphan_wipes; | |
450 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a | 451 | |
83273932 SE |
452 | struct ocfs2_orphan_scan osb_orphan_scan; |
453 | ||
c8b9cf9a TM |
454 | /* used to protect metaecc calculation check of xattr. */ |
455 | spinlock_t osb_xattr_lock; | |
9b7895ef MF |
456 | |
457 | unsigned int osb_dx_mask; | |
458 | u32 osb_dx_seed[4]; | |
feb473a6 TM |
459 | |
460 | /* the group we used to allocate inodes. */ | |
461 | u64 osb_inode_alloc_group; | |
374a263e TM |
462 | |
463 | /* rb tree root for refcount lock. */ | |
464 | struct rb_root osb_rf_lock_tree; | |
465 | struct ocfs2_refcount_tree *osb_ref_tree_lru; | |
43b10a20 | 466 | |
467 | struct mutex system_file_mutex; | |
35ddf78e | 468 | |
469 | /* | |
470 | * OCFS2 needs to schedule several different types of work which | |
471 | * require cluster locking, disk I/O, recovery waits, etc. Since these | |
472 | * types of work tend to be heavy we avoid using the kernel events | |
473 | * workqueue and schedule on our own. | |
474 | */ | |
475 | struct workqueue_struct *ocfs2_wq; | |
ccd979bd MF |
476 | }; |
477 | ||
478 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 479 | |
13723d00 | 480 | /* Useful typedef for passing around journal access functions */ |
0cf2f763 JB |
481 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, |
482 | struct ocfs2_caching_info *ci, | |
13723d00 JB |
483 | struct buffer_head *bh, int type); |
484 | ||
ccd979bd MF |
485 | static inline int ocfs2_should_order_data(struct inode *inode) |
486 | { | |
487 | if (!S_ISREG(inode->i_mode)) | |
488 | return 0; | |
489 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
490 | return 0; | |
491 | return 1; | |
492 | } | |
493 | ||
dcd0538f MF |
494 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
495 | { | |
496 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
497 | return 1; | |
498 | return 0; | |
499 | } | |
500 | ||
328d5752 MF |
501 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
502 | { | |
503 | /* | |
504 | * Support for sparse files is a pre-requisite | |
505 | */ | |
506 | if (!ocfs2_sparse_alloc(osb)) | |
507 | return 0; | |
508 | ||
509 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
510 | return 1; | |
511 | return 0; | |
512 | } | |
513 | ||
160cc266 JQ |
514 | static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb) |
515 | { | |
18d585f0 | 516 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO) |
160cc266 JQ |
517 | return 1; |
518 | return 0; | |
519 | } | |
520 | ||
521 | ||
15b1e36b MF |
522 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
523 | { | |
524 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
525 | return 1; | |
526 | return 0; | |
527 | } | |
528 | ||
8154da3d TY |
529 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
530 | { | |
531 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
532 | return 1; | |
533 | return 0; | |
534 | } | |
535 | ||
70ad1ba7 JB |
536 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
537 | { | |
538 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
539 | return 1; | |
540 | return 0; | |
541 | } | |
542 | ||
9b7895ef MF |
543 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
544 | { | |
545 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) | |
546 | return 1; | |
547 | return 0; | |
548 | } | |
549 | ||
4711954e | 550 | static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) |
798db35f JB |
551 | { |
552 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) | |
553 | return 1; | |
554 | return 0; | |
555 | } | |
556 | ||
198a1ca3 MF |
557 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
558 | { | |
559 | if (ocfs2_supports_indexed_dirs(osb)) | |
560 | return OCFS2_DX_LINK_MAX; | |
561 | return OCFS2_LINK_MAX; | |
562 | } | |
563 | ||
564 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) | |
565 | { | |
566 | u32 nlink = le16_to_cpu(di->i_links_count); | |
567 | u32 hi = le16_to_cpu(di->i_links_count_hi); | |
568 | ||
569 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) | |
570 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); | |
571 | ||
572 | return nlink; | |
573 | } | |
574 | ||
575 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) | |
576 | { | |
577 | u16 lo, hi; | |
578 | ||
579 | lo = nlink; | |
580 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; | |
581 | ||
582 | di->i_links_count = cpu_to_le16(lo); | |
583 | di->i_links_count_hi = cpu_to_le16(hi); | |
584 | } | |
585 | ||
586 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) | |
587 | { | |
588 | u32 links = ocfs2_read_links_count(di); | |
589 | ||
590 | links += n; | |
591 | ||
592 | ocfs2_set_links_count(di, links); | |
593 | } | |
594 | ||
1aa75fea TM |
595 | static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) |
596 | { | |
597 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) | |
598 | return 1; | |
599 | return 0; | |
600 | } | |
601 | ||
ccd979bd MF |
602 | /* set / clear functions because cluster events can make these happen |
603 | * in parallel so we want the transitions to be atomic. this also | |
604 | * means that any future flags osb_flags must be protected by spinlock | |
605 | * too! */ | |
606 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
607 | unsigned long flag) | |
608 | { | |
609 | spin_lock(&osb->osb_lock); | |
610 | osb->osb_flags |= flag; | |
611 | spin_unlock(&osb->osb_lock); | |
612 | } | |
613 | ||
614 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
615 | int hard) | |
616 | { | |
617 | spin_lock(&osb->osb_lock); | |
618 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
619 | if (hard) | |
620 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
621 | else | |
622 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
623 | spin_unlock(&osb->osb_lock); | |
624 | } | |
625 | ||
626 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
627 | { | |
628 | int ret; | |
629 | ||
630 | spin_lock(&osb->osb_lock); | |
631 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
632 | spin_unlock(&osb->osb_lock); | |
633 | ||
634 | return ret; | |
635 | } | |
636 | ||
637 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
638 | { | |
639 | int ret; | |
640 | ||
641 | spin_lock(&osb->osb_lock); | |
642 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
643 | spin_unlock(&osb->osb_lock); | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
98f486f2 | 648 | static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) |
b61817e1 JB |
649 | { |
650 | return (osb->s_feature_incompat & | |
98f486f2 SM |
651 | (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | |
652 | OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); | |
653 | } | |
654 | ||
655 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) | |
656 | { | |
657 | if (ocfs2_clusterinfo_valid(osb) && | |
658 | memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, | |
659 | OCFS2_STACK_LABEL_LEN)) | |
660 | return 1; | |
661 | return 0; | |
662 | } | |
663 | ||
664 | static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) | |
665 | { | |
666 | if (ocfs2_clusterinfo_valid(osb) && | |
667 | !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, | |
668 | OCFS2_STACK_LABEL_LEN)) | |
669 | return 1; | |
670 | return 0; | |
671 | } | |
672 | ||
673 | static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) | |
674 | { | |
675 | return ocfs2_o2cb_stack(osb) && | |
676 | (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); | |
b61817e1 JB |
677 | } |
678 | ||
c271c5c2 SM |
679 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
680 | { | |
681 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
682 | } | |
683 | ||
386a2ef8 JB |
684 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
685 | { | |
686 | return (osb->s_feature_incompat & | |
687 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
688 | } | |
689 | ||
690 | ||
ccd979bd MF |
691 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
692 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
693 | ||
ccd979bd MF |
694 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
695 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
696 | ||
ccd979bd MF |
697 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
698 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
699 | ||
ccd979bd | 700 | |
f6087fb7 JB |
701 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
702 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
703 | ||
87d35a74 MF |
704 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
705 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
706 | ||
9b7895ef MF |
707 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
708 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) | |
709 | ||
710 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ | |
711 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) | |
712 | ||
f2c870e3 TM |
713 | #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ |
714 | (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) | |
715 | ||
ccd979bd MF |
716 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
717 | u64 blkno) | |
718 | { | |
719 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
720 | } | |
721 | ||
722 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
723 | u32 clusters) | |
724 | { | |
725 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
726 | sb->s_blocksize_bits; | |
727 | ||
728 | return (u64)clusters << c_to_b_bits; | |
729 | } | |
730 | ||
ae1f0814 JQ |
731 | static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb, |
732 | u64 blocks) | |
733 | { | |
734 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
735 | sb->s_blocksize_bits; | |
736 | ||
737 | blocks += (1 << b_to_c_bits) - 1; | |
738 | return (u32)(blocks >> b_to_c_bits); | |
739 | } | |
740 | ||
ccd979bd MF |
741 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, |
742 | u64 blocks) | |
743 | { | |
744 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
745 | sb->s_blocksize_bits; | |
746 | ||
747 | return (u32)(blocks >> b_to_c_bits); | |
748 | } | |
749 | ||
750 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
751 | u64 bytes) | |
752 | { | |
753 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
754 | unsigned int clusters; | |
755 | ||
756 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
757 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
758 | clusters = (unsigned int)(bytes >> cl_bits); | |
759 | ||
760 | return clusters; | |
761 | } | |
762 | ||
24c40b32 JQ |
763 | static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb, |
764 | u64 bytes) | |
765 | { | |
766 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
767 | unsigned int clusters; | |
768 | ||
769 | clusters = (unsigned int)(bytes >> cl_bits); | |
770 | return clusters; | |
771 | } | |
772 | ||
ccd979bd MF |
773 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, |
774 | u64 bytes) | |
775 | { | |
776 | bytes += sb->s_blocksize - 1; | |
777 | return bytes >> sb->s_blocksize_bits; | |
778 | } | |
779 | ||
780 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
781 | u32 clusters) | |
782 | { | |
783 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
784 | } | |
785 | ||
1d46dc08 MF |
786 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
787 | u64 blocks) | |
788 | { | |
789 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; | |
790 | unsigned int clusters; | |
791 | ||
792 | clusters = ocfs2_blocks_to_clusters(sb, blocks); | |
793 | return (u64)clusters << bits; | |
794 | } | |
795 | ||
ccd979bd MF |
796 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
797 | u64 bytes) | |
798 | { | |
799 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
800 | unsigned int clusters; | |
801 | ||
802 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
803 | return (u64)clusters << cl_bits; | |
804 | } | |
805 | ||
806 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
807 | u64 bytes) | |
808 | { | |
809 | u64 blocks; | |
810 | ||
811 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
812 | return blocks << sb->s_blocksize_bits; | |
813 | } | |
814 | ||
815 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
816 | { | |
817 | return (unsigned long)((bytes + 511) >> 9); | |
818 | } | |
819 | ||
9517bac6 MF |
820 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
821 | unsigned long pg_index) | |
822 | { | |
823 | u32 clusters = pg_index; | |
824 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
825 | ||
09cbfeaf KS |
826 | if (unlikely(PAGE_SHIFT > cbits)) |
827 | clusters = pg_index << (PAGE_SHIFT - cbits); | |
828 | else if (PAGE_SHIFT < cbits) | |
829 | clusters = pg_index >> (cbits - PAGE_SHIFT); | |
9517bac6 MF |
830 | |
831 | return clusters; | |
832 | } | |
833 | ||
834 | /* | |
835 | * Find the 1st page index which covers the given clusters. | |
836 | */ | |
7c08d70c | 837 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
838 | u32 clusters) |
839 | { | |
840 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 841 | pgoff_t index = clusters; |
9517bac6 | 842 | |
09cbfeaf KS |
843 | if (PAGE_SHIFT > cbits) { |
844 | index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits); | |
845 | } else if (PAGE_SHIFT < cbits) { | |
846 | index = (pgoff_t)clusters << (cbits - PAGE_SHIFT); | |
9517bac6 MF |
847 | } |
848 | ||
849 | return index; | |
850 | } | |
851 | ||
60b11392 MF |
852 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
853 | { | |
854 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
855 | unsigned int pages_per_cluster = 1; | |
856 | ||
09cbfeaf KS |
857 | if (PAGE_SHIFT < cbits) |
858 | pages_per_cluster = 1 << (cbits - PAGE_SHIFT); | |
60b11392 MF |
859 | |
860 | return pages_per_cluster; | |
861 | } | |
862 | ||
ebcee4b5 MF |
863 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
864 | unsigned int megs) | |
865 | { | |
866 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
867 | ||
868 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
869 | } | |
870 | ||
73c8a800 MF |
871 | static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, |
872 | unsigned int clusters) | |
873 | { | |
874 | return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
875 | } | |
876 | ||
b4414eea MF |
877 | static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) |
878 | { | |
730e663b | 879 | __set_bit_le(bit, bitmap); |
b4414eea MF |
880 | } |
881 | #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) | |
882 | ||
883 | static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) | |
884 | { | |
730e663b | 885 | __clear_bit_le(bit, bitmap); |
b4414eea MF |
886 | } |
887 | #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) | |
888 | ||
c4354d0d AM |
889 | #define ocfs2_test_bit test_bit_le |
890 | #define ocfs2_find_next_zero_bit find_next_zero_bit_le | |
891 | #define ocfs2_find_next_bit find_next_bit_le | |
93925579 AM |
892 | |
893 | static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) | |
894 | { | |
895 | #if BITS_PER_LONG == 64 | |
896 | *bit += ((unsigned long) addr & 7UL) << 3; | |
897 | addr = (void *) ((unsigned long) addr & ~7UL); | |
898 | #elif BITS_PER_LONG == 32 | |
899 | *bit += ((unsigned long) addr & 3UL) << 3; | |
900 | addr = (void *) ((unsigned long) addr & ~3UL); | |
901 | #else | |
902 | #error "how many bits you are?!" | |
903 | #endif | |
904 | return addr; | |
905 | } | |
906 | ||
907 | static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) | |
908 | { | |
909 | bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); | |
910 | ocfs2_set_bit(bit, bitmap); | |
911 | } | |
912 | ||
913 | static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) | |
914 | { | |
915 | bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); | |
916 | ocfs2_clear_bit(bit, bitmap); | |
917 | } | |
918 | ||
919 | static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) | |
920 | { | |
921 | bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); | |
922 | return ocfs2_test_bit(bit, bitmap); | |
923 | } | |
924 | ||
925 | static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, | |
926 | int start) | |
927 | { | |
928 | int fix = 0, ret, tmpmax; | |
929 | bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); | |
930 | tmpmax = max + fix; | |
931 | start += fix; | |
932 | ||
933 | ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; | |
934 | if (ret > max) | |
935 | return max; | |
936 | return ret; | |
937 | } | |
938 | ||
ccd979bd MF |
939 | #endif /* OCFS2_H */ |
940 |