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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> | |
33 | #include <linux/rbtree.h> | |
34 | #include <linux/workqueue.h> | |
35 | #include <linux/kref.h> | |
c74ec2f7 | 36 | #include <linux/mutex.h> |
cb25797d | 37 | #include <linux/lockdep.h> |
7aee47b0 | 38 | #include <linux/jbd2.h> |
ccd979bd | 39 | |
8f2c9c1b JB |
40 | /* For union ocfs2_dlm_lksb */ |
41 | #include "stackglue.h" | |
ccd979bd MF |
42 | |
43 | #include "ocfs2_fs.h" | |
ccd979bd | 44 | #include "ocfs2_lockid.h" |
9df5778e | 45 | #include "ocfs2_ioctl.h" |
ccd979bd | 46 | |
73be192b JB |
47 | /* For struct ocfs2_blockcheck_stats */ |
48 | #include "blockcheck.h" | |
49 | ||
d02f00cc | 50 | #include "reservations.h" |
47460d65 JB |
51 | |
52 | /* Caching of metadata buffers */ | |
53 | ||
ccd979bd MF |
54 | /* Most user visible OCFS2 inodes will have very few pieces of |
55 | * metadata, but larger files (including bitmaps, etc) must be taken | |
56 | * into account when designing an access scheme. We allow a small | |
57 | * amount of inlined blocks to be stored on an array and grow the | |
58 | * structure into a rb tree when necessary. */ | |
47460d65 JB |
59 | #define OCFS2_CACHE_INFO_MAX_ARRAY 2 |
60 | ||
61 | /* Flags for ocfs2_caching_info */ | |
62 | ||
63 | enum ocfs2_caching_info_flags { | |
64 | /* Indicates that the metadata cache is using the inline array */ | |
65 | OCFS2_CACHE_FL_INLINE = 1<<1, | |
66 | }; | |
ccd979bd | 67 | |
6e5a3d75 | 68 | struct ocfs2_caching_operations; |
ccd979bd | 69 | struct ocfs2_caching_info { |
47460d65 JB |
70 | /* |
71 | * The parent structure provides the locks, but because the | |
6e5a3d75 JB |
72 | * parent structure can differ, it provides locking operations |
73 | * to struct ocfs2_caching_info. | |
47460d65 | 74 | */ |
6e5a3d75 | 75 | const struct ocfs2_caching_operations *ci_ops; |
47460d65 | 76 | |
292dd27e JB |
77 | /* next two are protected by trans_inc_lock */ |
78 | /* which transaction were we created on? Zero if none. */ | |
79 | unsigned long ci_created_trans; | |
66fb345d JB |
80 | /* last transaction we were a part of. */ |
81 | unsigned long ci_last_trans; | |
82 | ||
83 | /* Cache structures */ | |
47460d65 | 84 | unsigned int ci_flags; |
ccd979bd MF |
85 | unsigned int ci_num_cached; |
86 | union { | |
47460d65 | 87 | sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; |
ccd979bd MF |
88 | struct rb_root ci_tree; |
89 | } ci_cache; | |
90 | }; | |
0cf2f763 JB |
91 | /* |
92 | * Need this prototype here instead of in uptodate.h because journal.h | |
93 | * uses it. | |
94 | */ | |
95 | struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); | |
ccd979bd MF |
96 | |
97 | /* this limits us to 256 nodes | |
98 | * if we need more, we can do a kmalloc for the map */ | |
99 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
100 | struct ocfs2_node_map { | |
101 | u16 num_nodes; | |
102 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
103 | }; | |
104 | ||
105 | enum ocfs2_ast_action { | |
106 | OCFS2_AST_INVALID = 0, | |
107 | OCFS2_AST_ATTACH, | |
108 | OCFS2_AST_CONVERT, | |
109 | OCFS2_AST_DOWNCONVERT, | |
110 | }; | |
111 | ||
112 | /* actions for an unlockast function to take. */ | |
113 | enum ocfs2_unlock_action { | |
114 | OCFS2_UNLOCK_INVALID = 0, | |
115 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
116 | OCFS2_UNLOCK_DROP_LOCK, | |
117 | }; | |
118 | ||
119 | /* ocfs2_lock_res->l_flags flags. */ | |
3b5da018 | 120 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
ccd979bd MF |
121 | * the lvb */ |
122 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
123 | * dlm_lock */ | |
124 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
125 | * downconvert*/ | |
126 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
127 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
128 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
129 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
130 | * for shutdown paths */ | |
131 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
132 | * when to skip queueing | |
133 | * a lock because it's | |
134 | * about to be | |
135 | * dropped. */ | |
136 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 137 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
138 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
139 | call to dlm_lock. Only | |
140 | exists with BUSY set. */ | |
a1912826 SM |
141 | #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread |
142 | * from downconverting | |
143 | * before the upconvert | |
144 | * has completed */ | |
ccd979bd MF |
145 | |
146 | struct ocfs2_lock_res_ops; | |
147 | ||
148 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
149 | ||
150 | struct ocfs2_lock_res { | |
151 | void *l_priv; | |
152 | struct ocfs2_lock_res_ops *l_ops; | |
83fd9c7f | 153 | |
ccd979bd MF |
154 | |
155 | struct list_head l_blocked_list; | |
156 | struct list_head l_mask_waiters; | |
157 | ||
ccd979bd MF |
158 | unsigned long l_flags; |
159 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
ccd979bd MF |
160 | unsigned int l_ro_holders; |
161 | unsigned int l_ex_holders; | |
a2a2f552 MM |
162 | signed char l_level; |
163 | signed char l_requested; | |
164 | signed char l_blocking; | |
83fd9c7f GR |
165 | |
166 | /* Data packed - type enum ocfs2_lock_type */ | |
167 | unsigned char l_type; | |
ccd979bd MF |
168 | |
169 | /* used from AST/BAST funcs. */ | |
83fd9c7f GR |
170 | /* Data packed - enum type ocfs2_ast_action */ |
171 | unsigned char l_action; | |
172 | /* Data packed - enum type ocfs2_unlock_action */ | |
173 | unsigned char l_unlock_action; | |
de551246 | 174 | unsigned int l_pending_gen; |
ccd979bd | 175 | |
83fd9c7f GR |
176 | spinlock_t l_lock; |
177 | ||
178 | struct ocfs2_dlm_lksb l_lksb; | |
179 | ||
ccd979bd MF |
180 | wait_queue_head_t l_event; |
181 | ||
182 | struct list_head l_debug_list; | |
8ddb7b00 SM |
183 | |
184 | #ifdef CONFIG_OCFS2_FS_STATS | |
185 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
186 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
187 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
188 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
189 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
190 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
191 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
192 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
193 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
194 | #endif | |
cb25797d JK |
195 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
196 | struct lockdep_map l_lockdep_map; | |
197 | #endif | |
ccd979bd MF |
198 | }; |
199 | ||
692684e1 SM |
200 | enum ocfs2_orphan_scan_state { |
201 | ORPHAN_SCAN_ACTIVE, | |
202 | ORPHAN_SCAN_INACTIVE | |
203 | }; | |
204 | ||
83273932 SE |
205 | struct ocfs2_orphan_scan { |
206 | struct mutex os_lock; | |
207 | struct ocfs2_super *os_osb; | |
208 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ | |
209 | struct delayed_work os_orphan_scan_work; | |
15633a22 SE |
210 | struct timespec os_scantime; /* time this node ran the scan */ |
211 | u32 os_count; /* tracks node specific scans */ | |
212 | u32 os_seqno; /* tracks cluster wide scans */ | |
692684e1 | 213 | atomic_t os_state; /* ACTIVE or INACTIVE */ |
83273932 SE |
214 | }; |
215 | ||
ccd979bd MF |
216 | struct ocfs2_dlm_debug { |
217 | struct kref d_refcnt; | |
218 | struct dentry *d_locking_state; | |
219 | struct list_head d_lockres_tracking; | |
220 | }; | |
221 | ||
222 | enum ocfs2_vol_state | |
223 | { | |
224 | VOLUME_INIT = 0, | |
225 | VOLUME_MOUNTED, | |
19ece546 | 226 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
227 | VOLUME_DISMOUNTED, |
228 | VOLUME_DISABLED | |
229 | }; | |
230 | ||
231 | struct ocfs2_alloc_stats | |
232 | { | |
233 | atomic_t moves; | |
234 | atomic_t local_data; | |
235 | atomic_t bitmap_data; | |
236 | atomic_t bg_allocs; | |
237 | atomic_t bg_extends; | |
238 | }; | |
239 | ||
240 | enum ocfs2_local_alloc_state | |
241 | { | |
9c7af40b MF |
242 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
243 | * this mountpoint. */ | |
244 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
245 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
246 | * of bits has been reduced. */ | |
247 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
248 | * disabled. */ | |
ccd979bd MF |
249 | }; |
250 | ||
251 | enum ocfs2_mount_options | |
252 | { | |
2c442719 | 253 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ |
ccd979bd MF |
254 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ |
255 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
256 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
257 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 258 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 259 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 260 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
5297aad8 JK |
261 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ |
262 | OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access | |
263 | control lists */ | |
264 | OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ | |
265 | OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ | |
fc371891 JB |
266 | OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT |
267 | writes */ | |
268 | OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ | |
269 | OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ | |
ccd979bd MF |
270 | }; |
271 | ||
f7b1aa69 JK |
272 | #define OCFS2_OSB_SOFT_RO 0x0001 |
273 | #define OCFS2_OSB_HARD_RO 0x0002 | |
274 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
275 | #define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008 | |
276 | ||
277 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 | |
ccd979bd MF |
278 | |
279 | struct ocfs2_journal; | |
d85b20e4 | 280 | struct ocfs2_slot_info; |
553abd04 | 281 | struct ocfs2_recovery_map; |
9140db04 | 282 | struct ocfs2_replay_map; |
2205363d | 283 | struct ocfs2_quota_recovery; |
ea455f8a | 284 | struct ocfs2_dentry_lock; |
ccd979bd MF |
285 | struct ocfs2_super |
286 | { | |
ccd979bd MF |
287 | struct task_struct *commit_task; |
288 | struct super_block *sb; | |
289 | struct inode *root_inode; | |
290 | struct inode *sys_root_inode; | |
b4d693fc TM |
291 | struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; |
292 | struct inode **local_system_inodes; | |
ccd979bd MF |
293 | |
294 | struct ocfs2_slot_info *slot_info; | |
295 | ||
539d8264 SM |
296 | u32 *slot_recovery_generations; |
297 | ||
ccd979bd | 298 | spinlock_t node_map_lock; |
ccd979bd | 299 | |
ccd979bd MF |
300 | u64 root_blkno; |
301 | u64 system_dir_blkno; | |
302 | u64 bitmap_blkno; | |
303 | u32 bitmap_cpg; | |
304 | u8 *uuid; | |
305 | char *uuid_str; | |
cf1d6c76 | 306 | u32 uuid_hash; |
ccd979bd MF |
307 | u8 *vol_label; |
308 | u64 first_cluster_group_blkno; | |
309 | u32 fs_generation; | |
310 | ||
311 | u32 s_feature_compat; | |
312 | u32 s_feature_incompat; | |
313 | u32 s_feature_ro_compat; | |
314 | ||
4d0ddb2c TM |
315 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
316 | * Could protect more on osb as it's very short lived. | |
317 | */ | |
ccd979bd MF |
318 | spinlock_t osb_lock; |
319 | u32 s_next_generation; | |
320 | unsigned long osb_flags; | |
4d0ddb2c | 321 | s16 s_inode_steal_slot; |
b89c5428 | 322 | s16 s_meta_steal_slot; |
4d0ddb2c | 323 | atomic_t s_num_inodes_stolen; |
b89c5428 | 324 | atomic_t s_num_meta_stolen; |
ccd979bd MF |
325 | |
326 | unsigned long s_mount_opt; | |
7f1a37e3 | 327 | unsigned int s_atime_quantum; |
ccd979bd | 328 | |
fc881fa0 | 329 | unsigned int max_slots; |
19fdb624 | 330 | unsigned int node_num; |
fc881fa0 JB |
331 | int slot_num; |
332 | int preferred_slot; | |
ccd979bd MF |
333 | int s_sectsize_bits; |
334 | int s_clustersize; | |
335 | int s_clustersize_bits; | |
fdd77704 | 336 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
337 | |
338 | atomic_t vol_state; | |
c74ec2f7 | 339 | struct mutex recovery_lock; |
553abd04 | 340 | struct ocfs2_recovery_map *recovery_map; |
9140db04 | 341 | struct ocfs2_replay_map *replay_map; |
ccd979bd MF |
342 | struct task_struct *recovery_thread_task; |
343 | int disable_recovery; | |
344 | wait_queue_head_t checkpoint_event; | |
345 | atomic_t needs_checkpoint; | |
346 | struct ocfs2_journal *journal; | |
d147b3d6 | 347 | unsigned long osb_commit_interval; |
ccd979bd | 348 | |
9c7af40b MF |
349 | struct delayed_work la_enable_wq; |
350 | ||
351 | /* | |
352 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
353 | * local_alloc_bits. Reads can be done under either lock. | |
354 | */ | |
ebcee4b5 | 355 | unsigned int local_alloc_bits; |
9c7af40b | 356 | unsigned int local_alloc_default_bits; |
6b82021b MF |
357 | /* osb_clusters_at_boot can become stale! Do not trust it to |
358 | * be up to date. */ | |
359 | unsigned int osb_clusters_at_boot; | |
9c7af40b MF |
360 | |
361 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
362 | * by osb_lock */ | |
363 | ||
ccd979bd | 364 | struct buffer_head *local_alloc_bh; |
9c7af40b | 365 | |
883d4cae | 366 | u64 la_last_gd; |
ccd979bd | 367 | |
d02f00cc MF |
368 | struct ocfs2_reservation_map osb_la_resmap; |
369 | ||
370 | unsigned int osb_resv_level; | |
83f92318 | 371 | unsigned int osb_dir_resv_level; |
d02f00cc | 372 | |
2205363d | 373 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
374 | * mount. */ |
375 | int dirty; | |
376 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 377 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd | 378 | |
73be192b | 379 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
ccd979bd MF |
380 | struct ocfs2_alloc_stats alloc_stats; |
381 | char dev_str[20]; /* "major,minor" of the device */ | |
382 | ||
98f486f2 SM |
383 | u8 osb_stackflags; |
384 | ||
b61817e1 | 385 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 386 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
387 | struct ocfs2_lock_res osb_super_lockres; |
388 | struct ocfs2_lock_res osb_rename_lockres; | |
6ca497a8 | 389 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
ccd979bd MF |
390 | struct ocfs2_dlm_debug *osb_dlm_debug; |
391 | ||
392 | struct dentry *osb_debug_root; | |
50397507 | 393 | struct dentry *osb_ctxt; |
ccd979bd MF |
394 | |
395 | wait_queue_head_t recovery_event; | |
396 | ||
34d024f8 MF |
397 | spinlock_t dc_task_lock; |
398 | struct task_struct *dc_task; | |
399 | wait_queue_head_t dc_event; | |
400 | unsigned long dc_wake_sequence; | |
401 | unsigned long dc_work_sequence; | |
ccd979bd | 402 | |
7ec373cf MF |
403 | /* |
404 | * Any thread can add locks to the list, but the downconvert | |
405 | * thread is the only one allowed to remove locks. Any change | |
406 | * to this rule requires updating | |
407 | * ocfs2_downconvert_thread_do_work(). | |
408 | */ | |
ccd979bd MF |
409 | struct list_head blocked_lock_list; |
410 | unsigned long blocked_lock_count; | |
411 | ||
ea455f8a JK |
412 | /* List of dentry locks to release. Anyone can add locks to |
413 | * the list, ocfs2_wq processes the list */ | |
414 | struct ocfs2_dentry_lock *dentry_lock_list; | |
415 | struct work_struct dentry_lock_work; | |
416 | ||
ccd979bd MF |
417 | wait_queue_head_t osb_mount_event; |
418 | ||
419 | /* Truncate log info */ | |
420 | struct inode *osb_tl_inode; | |
421 | struct buffer_head *osb_tl_bh; | |
c4028958 | 422 | struct delayed_work osb_truncate_log_wq; |
50308d81 TM |
423 | /* |
424 | * How many clusters in our truncate log. | |
425 | * It must be protected by osb_tl_inode->i_mutex. | |
426 | */ | |
427 | unsigned int truncated_clusters; | |
b4df6ed8 MF |
428 | |
429 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
430 | unsigned int *osb_orphan_wipes; | |
431 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a | 432 | |
83273932 SE |
433 | struct ocfs2_orphan_scan osb_orphan_scan; |
434 | ||
c8b9cf9a TM |
435 | /* used to protect metaecc calculation check of xattr. */ |
436 | spinlock_t osb_xattr_lock; | |
9b7895ef MF |
437 | |
438 | unsigned int osb_dx_mask; | |
439 | u32 osb_dx_seed[4]; | |
feb473a6 TM |
440 | |
441 | /* the group we used to allocate inodes. */ | |
442 | u64 osb_inode_alloc_group; | |
374a263e TM |
443 | |
444 | /* rb tree root for refcount lock. */ | |
445 | struct rb_root osb_rf_lock_tree; | |
446 | struct ocfs2_refcount_tree *osb_ref_tree_lru; | |
ccd979bd MF |
447 | }; |
448 | ||
449 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 450 | |
13723d00 | 451 | /* Useful typedef for passing around journal access functions */ |
0cf2f763 JB |
452 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, |
453 | struct ocfs2_caching_info *ci, | |
13723d00 JB |
454 | struct buffer_head *bh, int type); |
455 | ||
ccd979bd MF |
456 | static inline int ocfs2_should_order_data(struct inode *inode) |
457 | { | |
458 | if (!S_ISREG(inode->i_mode)) | |
459 | return 0; | |
460 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
461 | return 0; | |
462 | return 1; | |
463 | } | |
464 | ||
dcd0538f MF |
465 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
466 | { | |
467 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
468 | return 1; | |
469 | return 0; | |
470 | } | |
471 | ||
328d5752 MF |
472 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
473 | { | |
474 | /* | |
475 | * Support for sparse files is a pre-requisite | |
476 | */ | |
477 | if (!ocfs2_sparse_alloc(osb)) | |
478 | return 0; | |
479 | ||
480 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
481 | return 1; | |
482 | return 0; | |
483 | } | |
484 | ||
15b1e36b MF |
485 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
486 | { | |
487 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
488 | return 1; | |
489 | return 0; | |
490 | } | |
491 | ||
8154da3d TY |
492 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
493 | { | |
494 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
495 | return 1; | |
496 | return 0; | |
497 | } | |
498 | ||
70ad1ba7 JB |
499 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
500 | { | |
501 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
502 | return 1; | |
503 | return 0; | |
504 | } | |
505 | ||
9b7895ef MF |
506 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
507 | { | |
508 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) | |
509 | return 1; | |
510 | return 0; | |
511 | } | |
512 | ||
4711954e | 513 | static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) |
798db35f JB |
514 | { |
515 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) | |
516 | return 1; | |
517 | return 0; | |
518 | } | |
519 | ||
198a1ca3 MF |
520 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
521 | { | |
522 | if (ocfs2_supports_indexed_dirs(osb)) | |
523 | return OCFS2_DX_LINK_MAX; | |
524 | return OCFS2_LINK_MAX; | |
525 | } | |
526 | ||
527 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) | |
528 | { | |
529 | u32 nlink = le16_to_cpu(di->i_links_count); | |
530 | u32 hi = le16_to_cpu(di->i_links_count_hi); | |
531 | ||
532 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) | |
533 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); | |
534 | ||
535 | return nlink; | |
536 | } | |
537 | ||
538 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) | |
539 | { | |
540 | u16 lo, hi; | |
541 | ||
542 | lo = nlink; | |
543 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; | |
544 | ||
545 | di->i_links_count = cpu_to_le16(lo); | |
546 | di->i_links_count_hi = cpu_to_le16(hi); | |
547 | } | |
548 | ||
549 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) | |
550 | { | |
551 | u32 links = ocfs2_read_links_count(di); | |
552 | ||
553 | links += n; | |
554 | ||
555 | ocfs2_set_links_count(di, links); | |
556 | } | |
557 | ||
1aa75fea TM |
558 | static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) |
559 | { | |
560 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) | |
561 | return 1; | |
562 | return 0; | |
563 | } | |
564 | ||
ccd979bd MF |
565 | /* set / clear functions because cluster events can make these happen |
566 | * in parallel so we want the transitions to be atomic. this also | |
567 | * means that any future flags osb_flags must be protected by spinlock | |
568 | * too! */ | |
569 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
570 | unsigned long flag) | |
571 | { | |
572 | spin_lock(&osb->osb_lock); | |
573 | osb->osb_flags |= flag; | |
574 | spin_unlock(&osb->osb_lock); | |
575 | } | |
576 | ||
f7b1aa69 JK |
577 | |
578 | static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb, | |
579 | unsigned long flag) | |
580 | { | |
581 | unsigned long ret; | |
582 | ||
583 | spin_lock(&osb->osb_lock); | |
584 | ret = osb->osb_flags & flag; | |
585 | spin_unlock(&osb->osb_lock); | |
586 | return ret; | |
587 | } | |
588 | ||
ccd979bd MF |
589 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, |
590 | int hard) | |
591 | { | |
592 | spin_lock(&osb->osb_lock); | |
593 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
594 | if (hard) | |
595 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
596 | else | |
597 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
598 | spin_unlock(&osb->osb_lock); | |
599 | } | |
600 | ||
601 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
602 | { | |
603 | int ret; | |
604 | ||
605 | spin_lock(&osb->osb_lock); | |
606 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
607 | spin_unlock(&osb->osb_lock); | |
608 | ||
609 | return ret; | |
610 | } | |
611 | ||
612 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
613 | { | |
614 | int ret; | |
615 | ||
616 | spin_lock(&osb->osb_lock); | |
617 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
618 | spin_unlock(&osb->osb_lock); | |
619 | ||
620 | return ret; | |
621 | } | |
622 | ||
98f486f2 | 623 | static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) |
b61817e1 JB |
624 | { |
625 | return (osb->s_feature_incompat & | |
98f486f2 SM |
626 | (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | |
627 | OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); | |
628 | } | |
629 | ||
630 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) | |
631 | { | |
632 | if (ocfs2_clusterinfo_valid(osb) && | |
633 | memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, | |
634 | OCFS2_STACK_LABEL_LEN)) | |
635 | return 1; | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) | |
640 | { | |
641 | if (ocfs2_clusterinfo_valid(osb) && | |
642 | !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, | |
643 | OCFS2_STACK_LABEL_LEN)) | |
644 | return 1; | |
645 | return 0; | |
646 | } | |
647 | ||
648 | static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) | |
649 | { | |
650 | return ocfs2_o2cb_stack(osb) && | |
651 | (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); | |
b61817e1 JB |
652 | } |
653 | ||
c271c5c2 SM |
654 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
655 | { | |
656 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
657 | } | |
658 | ||
386a2ef8 JB |
659 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
660 | { | |
661 | return (osb->s_feature_incompat & | |
662 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
663 | } | |
664 | ||
665 | ||
ccd979bd MF |
666 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
667 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
668 | ||
ccd979bd MF |
669 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
670 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
671 | ||
ccd979bd MF |
672 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
673 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
674 | ||
ccd979bd | 675 | |
f6087fb7 JB |
676 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
677 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
678 | ||
87d35a74 MF |
679 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
680 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
681 | ||
9b7895ef MF |
682 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
683 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) | |
684 | ||
685 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ | |
686 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) | |
687 | ||
f2c870e3 TM |
688 | #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ |
689 | (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) | |
690 | ||
ccd979bd MF |
691 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
692 | u64 blkno) | |
693 | { | |
694 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
695 | } | |
696 | ||
697 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
698 | u32 clusters) | |
699 | { | |
700 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
701 | sb->s_blocksize_bits; | |
702 | ||
703 | return (u64)clusters << c_to_b_bits; | |
704 | } | |
705 | ||
706 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
707 | u64 blocks) | |
708 | { | |
709 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
710 | sb->s_blocksize_bits; | |
711 | ||
712 | return (u32)(blocks >> b_to_c_bits); | |
713 | } | |
714 | ||
715 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
716 | u64 bytes) | |
717 | { | |
718 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
719 | unsigned int clusters; | |
720 | ||
721 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
722 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
723 | clusters = (unsigned int)(bytes >> cl_bits); | |
724 | ||
725 | return clusters; | |
726 | } | |
727 | ||
728 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
729 | u64 bytes) | |
730 | { | |
731 | bytes += sb->s_blocksize - 1; | |
732 | return bytes >> sb->s_blocksize_bits; | |
733 | } | |
734 | ||
735 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
736 | u32 clusters) | |
737 | { | |
738 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
739 | } | |
740 | ||
1d46dc08 MF |
741 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
742 | u64 blocks) | |
743 | { | |
744 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; | |
745 | unsigned int clusters; | |
746 | ||
747 | clusters = ocfs2_blocks_to_clusters(sb, blocks); | |
748 | return (u64)clusters << bits; | |
749 | } | |
750 | ||
ccd979bd MF |
751 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
752 | u64 bytes) | |
753 | { | |
754 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
755 | unsigned int clusters; | |
756 | ||
757 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
758 | return (u64)clusters << cl_bits; | |
759 | } | |
760 | ||
761 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
762 | u64 bytes) | |
763 | { | |
764 | u64 blocks; | |
765 | ||
766 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
767 | return blocks << sb->s_blocksize_bits; | |
768 | } | |
769 | ||
770 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
771 | { | |
772 | return (unsigned long)((bytes + 511) >> 9); | |
773 | } | |
774 | ||
9517bac6 MF |
775 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
776 | unsigned long pg_index) | |
777 | { | |
778 | u32 clusters = pg_index; | |
779 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
780 | ||
781 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
782 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
783 | else if (PAGE_CACHE_SHIFT < cbits) | |
784 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
785 | ||
786 | return clusters; | |
787 | } | |
788 | ||
789 | /* | |
790 | * Find the 1st page index which covers the given clusters. | |
791 | */ | |
7c08d70c | 792 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
793 | u32 clusters) |
794 | { | |
795 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 796 | pgoff_t index = clusters; |
9517bac6 MF |
797 | |
798 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 799 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 800 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 801 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
802 | } |
803 | ||
804 | return index; | |
805 | } | |
806 | ||
60b11392 MF |
807 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
808 | { | |
809 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
810 | unsigned int pages_per_cluster = 1; | |
811 | ||
812 | if (PAGE_CACHE_SHIFT < cbits) | |
813 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
814 | ||
815 | return pages_per_cluster; | |
816 | } | |
817 | ||
ebcee4b5 MF |
818 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
819 | unsigned int megs) | |
820 | { | |
821 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
822 | ||
823 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
824 | } | |
825 | ||
73c8a800 MF |
826 | static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, |
827 | unsigned int clusters) | |
828 | { | |
829 | return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
830 | } | |
831 | ||
b4414eea MF |
832 | static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) |
833 | { | |
c4354d0d | 834 | __test_and_set_bit_le(bit, bitmap); |
b4414eea MF |
835 | } |
836 | #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) | |
837 | ||
838 | static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) | |
839 | { | |
c4354d0d | 840 | __test_and_clear_bit_le(bit, bitmap); |
b4414eea MF |
841 | } |
842 | #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) | |
843 | ||
c4354d0d AM |
844 | #define ocfs2_test_bit test_bit_le |
845 | #define ocfs2_find_next_zero_bit find_next_zero_bit_le | |
846 | #define ocfs2_find_next_bit find_next_bit_le | |
ccd979bd MF |
847 | #endif /* OCFS2_H */ |
848 |