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