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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; | |
153 | spinlock_t l_lock; | |
154 | ||
155 | struct list_head l_blocked_list; | |
156 | struct list_head l_mask_waiters; | |
157 | ||
158 | enum ocfs2_lock_type l_type; | |
159 | unsigned long l_flags; | |
160 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
161 | int l_level; | |
162 | unsigned int l_ro_holders; | |
163 | unsigned int l_ex_holders; | |
c0e41338 | 164 | struct ocfs2_dlm_lksb l_lksb; |
ccd979bd MF |
165 | |
166 | /* used from AST/BAST funcs. */ | |
167 | enum ocfs2_ast_action l_action; | |
168 | enum ocfs2_unlock_action l_unlock_action; | |
169 | int l_requested; | |
170 | int l_blocking; | |
de551246 | 171 | unsigned int l_pending_gen; |
ccd979bd MF |
172 | |
173 | wait_queue_head_t l_event; | |
174 | ||
175 | struct list_head l_debug_list; | |
8ddb7b00 SM |
176 | |
177 | #ifdef CONFIG_OCFS2_FS_STATS | |
178 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
179 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
180 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
181 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
182 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
183 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
184 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
185 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
186 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
187 | #endif | |
cb25797d JK |
188 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
189 | struct lockdep_map l_lockdep_map; | |
190 | #endif | |
ccd979bd MF |
191 | }; |
192 | ||
692684e1 SM |
193 | enum ocfs2_orphan_scan_state { |
194 | ORPHAN_SCAN_ACTIVE, | |
195 | ORPHAN_SCAN_INACTIVE | |
196 | }; | |
197 | ||
83273932 SE |
198 | struct ocfs2_orphan_scan { |
199 | struct mutex os_lock; | |
200 | struct ocfs2_super *os_osb; | |
201 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ | |
202 | struct delayed_work os_orphan_scan_work; | |
15633a22 SE |
203 | struct timespec os_scantime; /* time this node ran the scan */ |
204 | u32 os_count; /* tracks node specific scans */ | |
205 | u32 os_seqno; /* tracks cluster wide scans */ | |
692684e1 | 206 | atomic_t os_state; /* ACTIVE or INACTIVE */ |
83273932 SE |
207 | }; |
208 | ||
ccd979bd MF |
209 | struct ocfs2_dlm_debug { |
210 | struct kref d_refcnt; | |
211 | struct dentry *d_locking_state; | |
212 | struct list_head d_lockres_tracking; | |
213 | }; | |
214 | ||
215 | enum ocfs2_vol_state | |
216 | { | |
217 | VOLUME_INIT = 0, | |
218 | VOLUME_MOUNTED, | |
19ece546 | 219 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
220 | VOLUME_DISMOUNTED, |
221 | VOLUME_DISABLED | |
222 | }; | |
223 | ||
224 | struct ocfs2_alloc_stats | |
225 | { | |
226 | atomic_t moves; | |
227 | atomic_t local_data; | |
228 | atomic_t bitmap_data; | |
229 | atomic_t bg_allocs; | |
230 | atomic_t bg_extends; | |
231 | }; | |
232 | ||
233 | enum ocfs2_local_alloc_state | |
234 | { | |
9c7af40b MF |
235 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
236 | * this mountpoint. */ | |
237 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
238 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
239 | * of bits has been reduced. */ | |
240 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
241 | * disabled. */ | |
ccd979bd MF |
242 | }; |
243 | ||
244 | enum ocfs2_mount_options | |
245 | { | |
246 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
247 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
248 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
249 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
250 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 251 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 252 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 253 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
5297aad8 JK |
254 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ |
255 | OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access | |
256 | control lists */ | |
257 | OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ | |
258 | OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ | |
ccd979bd MF |
259 | }; |
260 | ||
f7b1aa69 JK |
261 | #define OCFS2_OSB_SOFT_RO 0x0001 |
262 | #define OCFS2_OSB_HARD_RO 0x0002 | |
263 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
264 | #define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008 | |
265 | ||
266 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 | |
ccd979bd MF |
267 | |
268 | struct ocfs2_journal; | |
d85b20e4 | 269 | struct ocfs2_slot_info; |
553abd04 | 270 | struct ocfs2_recovery_map; |
9140db04 | 271 | struct ocfs2_replay_map; |
2205363d | 272 | struct ocfs2_quota_recovery; |
ea455f8a | 273 | struct ocfs2_dentry_lock; |
ccd979bd MF |
274 | struct ocfs2_super |
275 | { | |
ccd979bd MF |
276 | struct task_struct *commit_task; |
277 | struct super_block *sb; | |
278 | struct inode *root_inode; | |
279 | struct inode *sys_root_inode; | |
280 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
281 | ||
282 | struct ocfs2_slot_info *slot_info; | |
283 | ||
539d8264 SM |
284 | u32 *slot_recovery_generations; |
285 | ||
ccd979bd | 286 | spinlock_t node_map_lock; |
ccd979bd | 287 | |
ccd979bd MF |
288 | u64 root_blkno; |
289 | u64 system_dir_blkno; | |
290 | u64 bitmap_blkno; | |
291 | u32 bitmap_cpg; | |
292 | u8 *uuid; | |
293 | char *uuid_str; | |
cf1d6c76 | 294 | u32 uuid_hash; |
ccd979bd MF |
295 | u8 *vol_label; |
296 | u64 first_cluster_group_blkno; | |
297 | u32 fs_generation; | |
298 | ||
299 | u32 s_feature_compat; | |
300 | u32 s_feature_incompat; | |
301 | u32 s_feature_ro_compat; | |
302 | ||
4d0ddb2c TM |
303 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
304 | * Could protect more on osb as it's very short lived. | |
305 | */ | |
ccd979bd MF |
306 | spinlock_t osb_lock; |
307 | u32 s_next_generation; | |
308 | unsigned long osb_flags; | |
4d0ddb2c | 309 | s16 s_inode_steal_slot; |
b89c5428 | 310 | s16 s_meta_steal_slot; |
4d0ddb2c | 311 | atomic_t s_num_inodes_stolen; |
b89c5428 | 312 | atomic_t s_num_meta_stolen; |
ccd979bd MF |
313 | |
314 | unsigned long s_mount_opt; | |
7f1a37e3 | 315 | unsigned int s_atime_quantum; |
ccd979bd | 316 | |
fc881fa0 | 317 | unsigned int max_slots; |
19fdb624 | 318 | unsigned int node_num; |
fc881fa0 JB |
319 | int slot_num; |
320 | int preferred_slot; | |
ccd979bd MF |
321 | int s_sectsize_bits; |
322 | int s_clustersize; | |
323 | int s_clustersize_bits; | |
fdd77704 | 324 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
325 | |
326 | atomic_t vol_state; | |
c74ec2f7 | 327 | struct mutex recovery_lock; |
553abd04 | 328 | struct ocfs2_recovery_map *recovery_map; |
9140db04 | 329 | struct ocfs2_replay_map *replay_map; |
ccd979bd MF |
330 | struct task_struct *recovery_thread_task; |
331 | int disable_recovery; | |
332 | wait_queue_head_t checkpoint_event; | |
333 | atomic_t needs_checkpoint; | |
334 | struct ocfs2_journal *journal; | |
d147b3d6 | 335 | unsigned long osb_commit_interval; |
ccd979bd | 336 | |
9c7af40b MF |
337 | struct delayed_work la_enable_wq; |
338 | ||
339 | /* | |
340 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
341 | * local_alloc_bits. Reads can be done under either lock. | |
342 | */ | |
ebcee4b5 | 343 | unsigned int local_alloc_bits; |
9c7af40b | 344 | unsigned int local_alloc_default_bits; |
6b82021b MF |
345 | /* osb_clusters_at_boot can become stale! Do not trust it to |
346 | * be up to date. */ | |
347 | unsigned int osb_clusters_at_boot; | |
9c7af40b MF |
348 | |
349 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
350 | * by osb_lock */ | |
351 | ||
ccd979bd | 352 | struct buffer_head *local_alloc_bh; |
9c7af40b | 353 | |
883d4cae | 354 | u64 la_last_gd; |
ccd979bd | 355 | |
d02f00cc MF |
356 | struct ocfs2_reservation_map osb_la_resmap; |
357 | ||
358 | unsigned int osb_resv_level; | |
359 | ||
2205363d | 360 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
361 | * mount. */ |
362 | int dirty; | |
363 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 364 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd | 365 | |
73be192b | 366 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
ccd979bd MF |
367 | struct ocfs2_alloc_stats alloc_stats; |
368 | char dev_str[20]; /* "major,minor" of the device */ | |
369 | ||
b61817e1 | 370 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 371 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
372 | struct ocfs2_lock_res osb_super_lockres; |
373 | struct ocfs2_lock_res osb_rename_lockres; | |
6ca497a8 | 374 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
ccd979bd MF |
375 | struct ocfs2_dlm_debug *osb_dlm_debug; |
376 | ||
377 | struct dentry *osb_debug_root; | |
50397507 | 378 | struct dentry *osb_ctxt; |
ccd979bd MF |
379 | |
380 | wait_queue_head_t recovery_event; | |
381 | ||
34d024f8 MF |
382 | spinlock_t dc_task_lock; |
383 | struct task_struct *dc_task; | |
384 | wait_queue_head_t dc_event; | |
385 | unsigned long dc_wake_sequence; | |
386 | unsigned long dc_work_sequence; | |
ccd979bd | 387 | |
7ec373cf MF |
388 | /* |
389 | * Any thread can add locks to the list, but the downconvert | |
390 | * thread is the only one allowed to remove locks. Any change | |
391 | * to this rule requires updating | |
392 | * ocfs2_downconvert_thread_do_work(). | |
393 | */ | |
ccd979bd MF |
394 | struct list_head blocked_lock_list; |
395 | unsigned long blocked_lock_count; | |
396 | ||
ea455f8a JK |
397 | /* List of dentry locks to release. Anyone can add locks to |
398 | * the list, ocfs2_wq processes the list */ | |
399 | struct ocfs2_dentry_lock *dentry_lock_list; | |
400 | struct work_struct dentry_lock_work; | |
401 | ||
ccd979bd MF |
402 | wait_queue_head_t osb_mount_event; |
403 | ||
404 | /* Truncate log info */ | |
405 | struct inode *osb_tl_inode; | |
406 | struct buffer_head *osb_tl_bh; | |
c4028958 | 407 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
408 | |
409 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
410 | unsigned int *osb_orphan_wipes; | |
411 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a | 412 | |
83273932 SE |
413 | struct ocfs2_orphan_scan osb_orphan_scan; |
414 | ||
c8b9cf9a TM |
415 | /* used to protect metaecc calculation check of xattr. */ |
416 | spinlock_t osb_xattr_lock; | |
9b7895ef MF |
417 | |
418 | unsigned int osb_dx_mask; | |
419 | u32 osb_dx_seed[4]; | |
feb473a6 TM |
420 | |
421 | /* the group we used to allocate inodes. */ | |
422 | u64 osb_inode_alloc_group; | |
374a263e TM |
423 | |
424 | /* rb tree root for refcount lock. */ | |
425 | struct rb_root osb_rf_lock_tree; | |
426 | struct ocfs2_refcount_tree *osb_ref_tree_lru; | |
ccd979bd MF |
427 | }; |
428 | ||
429 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 430 | |
13723d00 | 431 | /* Useful typedef for passing around journal access functions */ |
0cf2f763 JB |
432 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, |
433 | struct ocfs2_caching_info *ci, | |
13723d00 JB |
434 | struct buffer_head *bh, int type); |
435 | ||
ccd979bd MF |
436 | static inline int ocfs2_should_order_data(struct inode *inode) |
437 | { | |
438 | if (!S_ISREG(inode->i_mode)) | |
439 | return 0; | |
440 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
441 | return 0; | |
442 | return 1; | |
443 | } | |
444 | ||
dcd0538f MF |
445 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
446 | { | |
447 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
448 | return 1; | |
449 | return 0; | |
450 | } | |
451 | ||
328d5752 MF |
452 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
453 | { | |
454 | /* | |
455 | * Support for sparse files is a pre-requisite | |
456 | */ | |
457 | if (!ocfs2_sparse_alloc(osb)) | |
458 | return 0; | |
459 | ||
460 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
461 | return 1; | |
462 | return 0; | |
463 | } | |
464 | ||
15b1e36b MF |
465 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
466 | { | |
467 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
468 | return 1; | |
469 | return 0; | |
470 | } | |
471 | ||
8154da3d TY |
472 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
473 | { | |
474 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
475 | return 1; | |
476 | return 0; | |
477 | } | |
478 | ||
70ad1ba7 JB |
479 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
480 | { | |
481 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
482 | return 1; | |
483 | return 0; | |
484 | } | |
485 | ||
9b7895ef MF |
486 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
487 | { | |
488 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) | |
489 | return 1; | |
490 | return 0; | |
491 | } | |
492 | ||
198a1ca3 MF |
493 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
494 | { | |
495 | if (ocfs2_supports_indexed_dirs(osb)) | |
496 | return OCFS2_DX_LINK_MAX; | |
497 | return OCFS2_LINK_MAX; | |
498 | } | |
499 | ||
500 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) | |
501 | { | |
502 | u32 nlink = le16_to_cpu(di->i_links_count); | |
503 | u32 hi = le16_to_cpu(di->i_links_count_hi); | |
504 | ||
505 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) | |
506 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); | |
507 | ||
508 | return nlink; | |
509 | } | |
510 | ||
511 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) | |
512 | { | |
513 | u16 lo, hi; | |
514 | ||
515 | lo = nlink; | |
516 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; | |
517 | ||
518 | di->i_links_count = cpu_to_le16(lo); | |
519 | di->i_links_count_hi = cpu_to_le16(hi); | |
520 | } | |
521 | ||
522 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) | |
523 | { | |
524 | u32 links = ocfs2_read_links_count(di); | |
525 | ||
526 | links += n; | |
527 | ||
528 | ocfs2_set_links_count(di, links); | |
529 | } | |
530 | ||
1aa75fea TM |
531 | static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) |
532 | { | |
533 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) | |
534 | return 1; | |
535 | return 0; | |
536 | } | |
537 | ||
ccd979bd MF |
538 | /* set / clear functions because cluster events can make these happen |
539 | * in parallel so we want the transitions to be atomic. this also | |
540 | * means that any future flags osb_flags must be protected by spinlock | |
541 | * too! */ | |
542 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
543 | unsigned long flag) | |
544 | { | |
545 | spin_lock(&osb->osb_lock); | |
546 | osb->osb_flags |= flag; | |
547 | spin_unlock(&osb->osb_lock); | |
548 | } | |
549 | ||
f7b1aa69 JK |
550 | |
551 | static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb, | |
552 | unsigned long flag) | |
553 | { | |
554 | unsigned long ret; | |
555 | ||
556 | spin_lock(&osb->osb_lock); | |
557 | ret = osb->osb_flags & flag; | |
558 | spin_unlock(&osb->osb_lock); | |
559 | return ret; | |
560 | } | |
561 | ||
ccd979bd MF |
562 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, |
563 | int hard) | |
564 | { | |
565 | spin_lock(&osb->osb_lock); | |
566 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
567 | if (hard) | |
568 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
569 | else | |
570 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
571 | spin_unlock(&osb->osb_lock); | |
572 | } | |
573 | ||
574 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
575 | { | |
576 | int ret; | |
577 | ||
578 | spin_lock(&osb->osb_lock); | |
579 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
580 | spin_unlock(&osb->osb_lock); | |
581 | ||
582 | return ret; | |
583 | } | |
584 | ||
585 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
586 | { | |
587 | int ret; | |
588 | ||
589 | spin_lock(&osb->osb_lock); | |
590 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
591 | spin_unlock(&osb->osb_lock); | |
592 | ||
593 | return ret; | |
594 | } | |
595 | ||
b61817e1 JB |
596 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
597 | { | |
598 | return (osb->s_feature_incompat & | |
599 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
600 | } | |
601 | ||
c271c5c2 SM |
602 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
603 | { | |
604 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
605 | } | |
606 | ||
386a2ef8 JB |
607 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
608 | { | |
609 | return (osb->s_feature_incompat & | |
610 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
611 | } | |
612 | ||
613 | ||
ccd979bd MF |
614 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
615 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
616 | ||
ccd979bd MF |
617 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
618 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
619 | ||
ccd979bd MF |
620 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
621 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
622 | ||
ccd979bd | 623 | |
f6087fb7 JB |
624 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
625 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
626 | ||
87d35a74 MF |
627 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
628 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
629 | ||
9b7895ef MF |
630 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
631 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) | |
632 | ||
633 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ | |
634 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) | |
635 | ||
f2c870e3 TM |
636 | #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ |
637 | (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) | |
638 | ||
ccd979bd MF |
639 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
640 | u64 blkno) | |
641 | { | |
642 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
643 | } | |
644 | ||
645 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
646 | u32 clusters) | |
647 | { | |
648 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
649 | sb->s_blocksize_bits; | |
650 | ||
651 | return (u64)clusters << c_to_b_bits; | |
652 | } | |
653 | ||
654 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
655 | u64 blocks) | |
656 | { | |
657 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
658 | sb->s_blocksize_bits; | |
659 | ||
660 | return (u32)(blocks >> b_to_c_bits); | |
661 | } | |
662 | ||
663 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
664 | u64 bytes) | |
665 | { | |
666 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
667 | unsigned int clusters; | |
668 | ||
669 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
670 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
671 | clusters = (unsigned int)(bytes >> cl_bits); | |
672 | ||
673 | return clusters; | |
674 | } | |
675 | ||
676 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
677 | u64 bytes) | |
678 | { | |
679 | bytes += sb->s_blocksize - 1; | |
680 | return bytes >> sb->s_blocksize_bits; | |
681 | } | |
682 | ||
683 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
684 | u32 clusters) | |
685 | { | |
686 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
687 | } | |
688 | ||
1d46dc08 MF |
689 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
690 | u64 blocks) | |
691 | { | |
692 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; | |
693 | unsigned int clusters; | |
694 | ||
695 | clusters = ocfs2_blocks_to_clusters(sb, blocks); | |
696 | return (u64)clusters << bits; | |
697 | } | |
698 | ||
ccd979bd MF |
699 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
700 | u64 bytes) | |
701 | { | |
702 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
703 | unsigned int clusters; | |
704 | ||
705 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
706 | return (u64)clusters << cl_bits; | |
707 | } | |
708 | ||
709 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
710 | u64 bytes) | |
711 | { | |
712 | u64 blocks; | |
713 | ||
714 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
715 | return blocks << sb->s_blocksize_bits; | |
716 | } | |
717 | ||
718 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
719 | { | |
720 | return (unsigned long)((bytes + 511) >> 9); | |
721 | } | |
722 | ||
9517bac6 MF |
723 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
724 | unsigned long pg_index) | |
725 | { | |
726 | u32 clusters = pg_index; | |
727 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
728 | ||
729 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
730 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
731 | else if (PAGE_CACHE_SHIFT < cbits) | |
732 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
733 | ||
734 | return clusters; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Find the 1st page index which covers the given clusters. | |
739 | */ | |
7c08d70c | 740 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
741 | u32 clusters) |
742 | { | |
743 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 744 | pgoff_t index = clusters; |
9517bac6 MF |
745 | |
746 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 747 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 748 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 749 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
750 | } |
751 | ||
752 | return index; | |
753 | } | |
754 | ||
60b11392 MF |
755 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
756 | { | |
757 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
758 | unsigned int pages_per_cluster = 1; | |
759 | ||
760 | if (PAGE_CACHE_SHIFT < cbits) | |
761 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
762 | ||
763 | return pages_per_cluster; | |
764 | } | |
765 | ||
ebcee4b5 MF |
766 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
767 | unsigned int megs) | |
768 | { | |
769 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
770 | ||
771 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
772 | } | |
773 | ||
73c8a800 MF |
774 | static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, |
775 | unsigned int clusters) | |
776 | { | |
777 | return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
778 | } | |
779 | ||
b4414eea MF |
780 | static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) |
781 | { | |
782 | ext2_set_bit(bit, bitmap); | |
783 | } | |
784 | #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) | |
785 | ||
786 | static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) | |
787 | { | |
788 | ext2_clear_bit(bit, bitmap); | |
789 | } | |
790 | #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) | |
791 | ||
ccd979bd MF |
792 | #define ocfs2_test_bit ext2_test_bit |
793 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
70ad1ba7 | 794 | #define ocfs2_find_next_bit ext2_find_next_bit |
ccd979bd MF |
795 | #endif /* OCFS2_H */ |
796 |