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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 | ||
47460d65 JB |
50 | |
51 | /* Caching of metadata buffers */ | |
52 | ||
ccd979bd MF |
53 | /* Most user visible OCFS2 inodes will have very few pieces of |
54 | * metadata, but larger files (including bitmaps, etc) must be taken | |
55 | * into account when designing an access scheme. We allow a small | |
56 | * amount of inlined blocks to be stored on an array and grow the | |
57 | * structure into a rb tree when necessary. */ | |
47460d65 JB |
58 | #define OCFS2_CACHE_INFO_MAX_ARRAY 2 |
59 | ||
60 | /* Flags for ocfs2_caching_info */ | |
61 | ||
62 | enum ocfs2_caching_info_flags { | |
63 | /* Indicates that the metadata cache is using the inline array */ | |
64 | OCFS2_CACHE_FL_INLINE = 1<<1, | |
65 | }; | |
ccd979bd | 66 | |
6e5a3d75 | 67 | struct ocfs2_caching_operations; |
ccd979bd | 68 | struct ocfs2_caching_info { |
47460d65 JB |
69 | /* |
70 | * The parent structure provides the locks, but because the | |
6e5a3d75 JB |
71 | * parent structure can differ, it provides locking operations |
72 | * to struct ocfs2_caching_info. | |
47460d65 | 73 | */ |
6e5a3d75 | 74 | const struct ocfs2_caching_operations *ci_ops; |
47460d65 | 75 | |
292dd27e JB |
76 | /* next two are protected by trans_inc_lock */ |
77 | /* which transaction were we created on? Zero if none. */ | |
78 | unsigned long ci_created_trans; | |
66fb345d JB |
79 | /* last transaction we were a part of. */ |
80 | unsigned long ci_last_trans; | |
81 | ||
82 | /* Cache structures */ | |
47460d65 | 83 | unsigned int ci_flags; |
ccd979bd MF |
84 | unsigned int ci_num_cached; |
85 | union { | |
47460d65 | 86 | sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; |
ccd979bd MF |
87 | struct rb_root ci_tree; |
88 | } ci_cache; | |
89 | }; | |
0cf2f763 JB |
90 | /* |
91 | * Need this prototype here instead of in uptodate.h because journal.h | |
92 | * uses it. | |
93 | */ | |
94 | struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); | |
ccd979bd MF |
95 | |
96 | /* this limits us to 256 nodes | |
97 | * if we need more, we can do a kmalloc for the map */ | |
98 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
99 | struct ocfs2_node_map { | |
100 | u16 num_nodes; | |
101 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
102 | }; | |
103 | ||
104 | enum ocfs2_ast_action { | |
105 | OCFS2_AST_INVALID = 0, | |
106 | OCFS2_AST_ATTACH, | |
107 | OCFS2_AST_CONVERT, | |
108 | OCFS2_AST_DOWNCONVERT, | |
109 | }; | |
110 | ||
111 | /* actions for an unlockast function to take. */ | |
112 | enum ocfs2_unlock_action { | |
113 | OCFS2_UNLOCK_INVALID = 0, | |
114 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
115 | OCFS2_UNLOCK_DROP_LOCK, | |
116 | }; | |
117 | ||
118 | /* ocfs2_lock_res->l_flags flags. */ | |
3b5da018 | 119 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
ccd979bd MF |
120 | * the lvb */ |
121 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
122 | * dlm_lock */ | |
123 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
124 | * downconvert*/ | |
125 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
126 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
127 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
128 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
129 | * for shutdown paths */ | |
130 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
131 | * when to skip queueing | |
132 | * a lock because it's | |
133 | * about to be | |
134 | * dropped. */ | |
135 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 136 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
137 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
138 | call to dlm_lock. Only | |
139 | exists with BUSY set. */ | |
a1912826 SM |
140 | #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread |
141 | * from downconverting | |
142 | * before the upconvert | |
143 | * has completed */ | |
ccd979bd MF |
144 | |
145 | struct ocfs2_lock_res_ops; | |
146 | ||
147 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
148 | ||
149 | struct ocfs2_lock_res { | |
150 | void *l_priv; | |
151 | struct ocfs2_lock_res_ops *l_ops; | |
152 | spinlock_t l_lock; | |
153 | ||
154 | struct list_head l_blocked_list; | |
155 | struct list_head l_mask_waiters; | |
156 | ||
157 | enum ocfs2_lock_type l_type; | |
158 | unsigned long l_flags; | |
159 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
160 | int l_level; | |
161 | unsigned int l_ro_holders; | |
162 | unsigned int l_ex_holders; | |
c0e41338 | 163 | struct ocfs2_dlm_lksb l_lksb; |
ccd979bd MF |
164 | |
165 | /* used from AST/BAST funcs. */ | |
166 | enum ocfs2_ast_action l_action; | |
167 | enum ocfs2_unlock_action l_unlock_action; | |
168 | int l_requested; | |
169 | int l_blocking; | |
de551246 | 170 | unsigned int l_pending_gen; |
ccd979bd MF |
171 | |
172 | wait_queue_head_t l_event; | |
173 | ||
174 | struct list_head l_debug_list; | |
8ddb7b00 SM |
175 | |
176 | #ifdef CONFIG_OCFS2_FS_STATS | |
177 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
178 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
179 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
180 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
181 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
182 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
183 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
184 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
185 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
186 | #endif | |
cb25797d JK |
187 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
188 | struct lockdep_map l_lockdep_map; | |
189 | #endif | |
ccd979bd MF |
190 | }; |
191 | ||
692684e1 SM |
192 | enum ocfs2_orphan_scan_state { |
193 | ORPHAN_SCAN_ACTIVE, | |
194 | ORPHAN_SCAN_INACTIVE | |
195 | }; | |
196 | ||
83273932 SE |
197 | struct ocfs2_orphan_scan { |
198 | struct mutex os_lock; | |
199 | struct ocfs2_super *os_osb; | |
200 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ | |
201 | struct delayed_work os_orphan_scan_work; | |
15633a22 SE |
202 | struct timespec os_scantime; /* time this node ran the scan */ |
203 | u32 os_count; /* tracks node specific scans */ | |
204 | u32 os_seqno; /* tracks cluster wide scans */ | |
692684e1 | 205 | atomic_t os_state; /* ACTIVE or INACTIVE */ |
83273932 SE |
206 | }; |
207 | ||
ccd979bd MF |
208 | struct ocfs2_dlm_debug { |
209 | struct kref d_refcnt; | |
210 | struct dentry *d_locking_state; | |
211 | struct list_head d_lockres_tracking; | |
212 | }; | |
213 | ||
214 | enum ocfs2_vol_state | |
215 | { | |
216 | VOLUME_INIT = 0, | |
217 | VOLUME_MOUNTED, | |
19ece546 | 218 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
219 | VOLUME_DISMOUNTED, |
220 | VOLUME_DISABLED | |
221 | }; | |
222 | ||
223 | struct ocfs2_alloc_stats | |
224 | { | |
225 | atomic_t moves; | |
226 | atomic_t local_data; | |
227 | atomic_t bitmap_data; | |
228 | atomic_t bg_allocs; | |
229 | atomic_t bg_extends; | |
230 | }; | |
231 | ||
232 | enum ocfs2_local_alloc_state | |
233 | { | |
9c7af40b MF |
234 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
235 | * this mountpoint. */ | |
236 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
237 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
238 | * of bits has been reduced. */ | |
239 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
240 | * disabled. */ | |
ccd979bd MF |
241 | }; |
242 | ||
243 | enum ocfs2_mount_options | |
244 | { | |
245 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
246 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
247 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
248 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
249 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 250 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 251 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 252 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
5297aad8 JK |
253 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ |
254 | OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access | |
255 | control lists */ | |
256 | OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ | |
257 | OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ | |
ccd979bd MF |
258 | }; |
259 | ||
f7b1aa69 JK |
260 | #define OCFS2_OSB_SOFT_RO 0x0001 |
261 | #define OCFS2_OSB_HARD_RO 0x0002 | |
262 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
263 | #define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008 | |
264 | ||
265 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 | |
ccd979bd MF |
266 | |
267 | struct ocfs2_journal; | |
d85b20e4 | 268 | struct ocfs2_slot_info; |
553abd04 | 269 | struct ocfs2_recovery_map; |
9140db04 | 270 | struct ocfs2_replay_map; |
2205363d | 271 | struct ocfs2_quota_recovery; |
ea455f8a | 272 | struct ocfs2_dentry_lock; |
ccd979bd MF |
273 | struct ocfs2_super |
274 | { | |
ccd979bd MF |
275 | struct task_struct *commit_task; |
276 | struct super_block *sb; | |
277 | struct inode *root_inode; | |
278 | struct inode *sys_root_inode; | |
279 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
280 | ||
281 | struct ocfs2_slot_info *slot_info; | |
282 | ||
539d8264 SM |
283 | u32 *slot_recovery_generations; |
284 | ||
ccd979bd | 285 | spinlock_t node_map_lock; |
ccd979bd | 286 | |
ccd979bd MF |
287 | u64 root_blkno; |
288 | u64 system_dir_blkno; | |
289 | u64 bitmap_blkno; | |
290 | u32 bitmap_cpg; | |
291 | u8 *uuid; | |
292 | char *uuid_str; | |
cf1d6c76 | 293 | u32 uuid_hash; |
ccd979bd MF |
294 | u8 *vol_label; |
295 | u64 first_cluster_group_blkno; | |
296 | u32 fs_generation; | |
297 | ||
298 | u32 s_feature_compat; | |
299 | u32 s_feature_incompat; | |
300 | u32 s_feature_ro_compat; | |
301 | ||
4d0ddb2c TM |
302 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
303 | * Could protect more on osb as it's very short lived. | |
304 | */ | |
ccd979bd MF |
305 | spinlock_t osb_lock; |
306 | u32 s_next_generation; | |
307 | unsigned long osb_flags; | |
4d0ddb2c | 308 | s16 s_inode_steal_slot; |
b89c5428 | 309 | s16 s_meta_steal_slot; |
4d0ddb2c | 310 | atomic_t s_num_inodes_stolen; |
b89c5428 | 311 | atomic_t s_num_meta_stolen; |
ccd979bd MF |
312 | |
313 | unsigned long s_mount_opt; | |
7f1a37e3 | 314 | unsigned int s_atime_quantum; |
ccd979bd | 315 | |
fc881fa0 | 316 | unsigned int max_slots; |
19fdb624 | 317 | unsigned int node_num; |
fc881fa0 JB |
318 | int slot_num; |
319 | int preferred_slot; | |
ccd979bd MF |
320 | int s_sectsize_bits; |
321 | int s_clustersize; | |
322 | int s_clustersize_bits; | |
fdd77704 | 323 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
324 | |
325 | atomic_t vol_state; | |
c74ec2f7 | 326 | struct mutex recovery_lock; |
553abd04 | 327 | struct ocfs2_recovery_map *recovery_map; |
9140db04 | 328 | struct ocfs2_replay_map *replay_map; |
ccd979bd MF |
329 | struct task_struct *recovery_thread_task; |
330 | int disable_recovery; | |
331 | wait_queue_head_t checkpoint_event; | |
332 | atomic_t needs_checkpoint; | |
333 | struct ocfs2_journal *journal; | |
d147b3d6 | 334 | unsigned long osb_commit_interval; |
ccd979bd | 335 | |
9c7af40b MF |
336 | struct delayed_work la_enable_wq; |
337 | ||
338 | /* | |
339 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
340 | * local_alloc_bits. Reads can be done under either lock. | |
341 | */ | |
ebcee4b5 | 342 | unsigned int local_alloc_bits; |
9c7af40b MF |
343 | unsigned int local_alloc_default_bits; |
344 | ||
345 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
346 | * by osb_lock */ | |
347 | ||
ccd979bd | 348 | struct buffer_head *local_alloc_bh; |
9c7af40b | 349 | |
883d4cae | 350 | u64 la_last_gd; |
ccd979bd | 351 | |
2205363d | 352 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
353 | * mount. */ |
354 | int dirty; | |
355 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 356 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd | 357 | |
73be192b | 358 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
ccd979bd MF |
359 | struct ocfs2_alloc_stats alloc_stats; |
360 | char dev_str[20]; /* "major,minor" of the device */ | |
361 | ||
b61817e1 | 362 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 363 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
364 | struct ocfs2_lock_res osb_super_lockres; |
365 | struct ocfs2_lock_res osb_rename_lockres; | |
6ca497a8 | 366 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
ccd979bd MF |
367 | struct ocfs2_dlm_debug *osb_dlm_debug; |
368 | ||
369 | struct dentry *osb_debug_root; | |
50397507 | 370 | struct dentry *osb_ctxt; |
ccd979bd MF |
371 | |
372 | wait_queue_head_t recovery_event; | |
373 | ||
34d024f8 MF |
374 | spinlock_t dc_task_lock; |
375 | struct task_struct *dc_task; | |
376 | wait_queue_head_t dc_event; | |
377 | unsigned long dc_wake_sequence; | |
378 | unsigned long dc_work_sequence; | |
ccd979bd | 379 | |
7ec373cf MF |
380 | /* |
381 | * Any thread can add locks to the list, but the downconvert | |
382 | * thread is the only one allowed to remove locks. Any change | |
383 | * to this rule requires updating | |
384 | * ocfs2_downconvert_thread_do_work(). | |
385 | */ | |
ccd979bd MF |
386 | struct list_head blocked_lock_list; |
387 | unsigned long blocked_lock_count; | |
388 | ||
ea455f8a JK |
389 | /* List of dentry locks to release. Anyone can add locks to |
390 | * the list, ocfs2_wq processes the list */ | |
391 | struct ocfs2_dentry_lock *dentry_lock_list; | |
392 | struct work_struct dentry_lock_work; | |
393 | ||
ccd979bd MF |
394 | wait_queue_head_t osb_mount_event; |
395 | ||
396 | /* Truncate log info */ | |
397 | struct inode *osb_tl_inode; | |
398 | struct buffer_head *osb_tl_bh; | |
c4028958 | 399 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
400 | |
401 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
402 | unsigned int *osb_orphan_wipes; | |
403 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a | 404 | |
83273932 SE |
405 | struct ocfs2_orphan_scan osb_orphan_scan; |
406 | ||
c8b9cf9a TM |
407 | /* used to protect metaecc calculation check of xattr. */ |
408 | spinlock_t osb_xattr_lock; | |
9b7895ef MF |
409 | |
410 | unsigned int osb_dx_mask; | |
411 | u32 osb_dx_seed[4]; | |
feb473a6 TM |
412 | |
413 | /* the group we used to allocate inodes. */ | |
414 | u64 osb_inode_alloc_group; | |
374a263e TM |
415 | |
416 | /* rb tree root for refcount lock. */ | |
417 | struct rb_root osb_rf_lock_tree; | |
418 | struct ocfs2_refcount_tree *osb_ref_tree_lru; | |
ccd979bd MF |
419 | }; |
420 | ||
421 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 422 | |
13723d00 | 423 | /* Useful typedef for passing around journal access functions */ |
0cf2f763 JB |
424 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, |
425 | struct ocfs2_caching_info *ci, | |
13723d00 JB |
426 | struct buffer_head *bh, int type); |
427 | ||
ccd979bd MF |
428 | static inline int ocfs2_should_order_data(struct inode *inode) |
429 | { | |
430 | if (!S_ISREG(inode->i_mode)) | |
431 | return 0; | |
432 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
433 | return 0; | |
434 | return 1; | |
435 | } | |
436 | ||
dcd0538f MF |
437 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
438 | { | |
439 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
440 | return 1; | |
441 | return 0; | |
442 | } | |
443 | ||
328d5752 MF |
444 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
445 | { | |
446 | /* | |
447 | * Support for sparse files is a pre-requisite | |
448 | */ | |
449 | if (!ocfs2_sparse_alloc(osb)) | |
450 | return 0; | |
451 | ||
452 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
453 | return 1; | |
454 | return 0; | |
455 | } | |
456 | ||
15b1e36b MF |
457 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
458 | { | |
459 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
460 | return 1; | |
461 | return 0; | |
462 | } | |
463 | ||
8154da3d TY |
464 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
465 | { | |
466 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
467 | return 1; | |
468 | return 0; | |
469 | } | |
470 | ||
70ad1ba7 JB |
471 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
472 | { | |
473 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
474 | return 1; | |
475 | return 0; | |
476 | } | |
477 | ||
9b7895ef MF |
478 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
479 | { | |
480 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) | |
481 | return 1; | |
482 | return 0; | |
483 | } | |
484 | ||
198a1ca3 MF |
485 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
486 | { | |
487 | if (ocfs2_supports_indexed_dirs(osb)) | |
488 | return OCFS2_DX_LINK_MAX; | |
489 | return OCFS2_LINK_MAX; | |
490 | } | |
491 | ||
492 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) | |
493 | { | |
494 | u32 nlink = le16_to_cpu(di->i_links_count); | |
495 | u32 hi = le16_to_cpu(di->i_links_count_hi); | |
496 | ||
497 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) | |
498 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); | |
499 | ||
500 | return nlink; | |
501 | } | |
502 | ||
503 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) | |
504 | { | |
505 | u16 lo, hi; | |
506 | ||
507 | lo = nlink; | |
508 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; | |
509 | ||
510 | di->i_links_count = cpu_to_le16(lo); | |
511 | di->i_links_count_hi = cpu_to_le16(hi); | |
512 | } | |
513 | ||
514 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) | |
515 | { | |
516 | u32 links = ocfs2_read_links_count(di); | |
517 | ||
518 | links += n; | |
519 | ||
520 | ocfs2_set_links_count(di, links); | |
521 | } | |
522 | ||
1aa75fea TM |
523 | static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) |
524 | { | |
525 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) | |
526 | return 1; | |
527 | return 0; | |
528 | } | |
529 | ||
ccd979bd MF |
530 | /* set / clear functions because cluster events can make these happen |
531 | * in parallel so we want the transitions to be atomic. this also | |
532 | * means that any future flags osb_flags must be protected by spinlock | |
533 | * too! */ | |
534 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
535 | unsigned long flag) | |
536 | { | |
537 | spin_lock(&osb->osb_lock); | |
538 | osb->osb_flags |= flag; | |
539 | spin_unlock(&osb->osb_lock); | |
540 | } | |
541 | ||
f7b1aa69 JK |
542 | |
543 | static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb, | |
544 | unsigned long flag) | |
545 | { | |
546 | unsigned long ret; | |
547 | ||
548 | spin_lock(&osb->osb_lock); | |
549 | ret = osb->osb_flags & flag; | |
550 | spin_unlock(&osb->osb_lock); | |
551 | return ret; | |
552 | } | |
553 | ||
ccd979bd MF |
554 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, |
555 | int hard) | |
556 | { | |
557 | spin_lock(&osb->osb_lock); | |
558 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
559 | if (hard) | |
560 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
561 | else | |
562 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
563 | spin_unlock(&osb->osb_lock); | |
564 | } | |
565 | ||
566 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
567 | { | |
568 | int ret; | |
569 | ||
570 | spin_lock(&osb->osb_lock); | |
571 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
572 | spin_unlock(&osb->osb_lock); | |
573 | ||
574 | return ret; | |
575 | } | |
576 | ||
577 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
578 | { | |
579 | int ret; | |
580 | ||
581 | spin_lock(&osb->osb_lock); | |
582 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
583 | spin_unlock(&osb->osb_lock); | |
584 | ||
585 | return ret; | |
586 | } | |
587 | ||
b61817e1 JB |
588 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
589 | { | |
590 | return (osb->s_feature_incompat & | |
591 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
592 | } | |
593 | ||
c271c5c2 SM |
594 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
595 | { | |
596 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
597 | } | |
598 | ||
386a2ef8 JB |
599 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
600 | { | |
601 | return (osb->s_feature_incompat & | |
602 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
603 | } | |
604 | ||
605 | ||
ccd979bd MF |
606 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
607 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
608 | ||
ccd979bd MF |
609 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
610 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
611 | ||
ccd979bd MF |
612 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
613 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
614 | ||
ccd979bd | 615 | |
f6087fb7 JB |
616 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
617 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
618 | ||
87d35a74 MF |
619 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
620 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
621 | ||
9b7895ef MF |
622 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
623 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) | |
624 | ||
625 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ | |
626 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) | |
627 | ||
f2c870e3 TM |
628 | #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ |
629 | (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) | |
630 | ||
ccd979bd MF |
631 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
632 | u64 blkno) | |
633 | { | |
634 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
635 | } | |
636 | ||
637 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
638 | u32 clusters) | |
639 | { | |
640 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
641 | sb->s_blocksize_bits; | |
642 | ||
643 | return (u64)clusters << c_to_b_bits; | |
644 | } | |
645 | ||
646 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
647 | u64 blocks) | |
648 | { | |
649 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
650 | sb->s_blocksize_bits; | |
651 | ||
652 | return (u32)(blocks >> b_to_c_bits); | |
653 | } | |
654 | ||
655 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
656 | u64 bytes) | |
657 | { | |
658 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
659 | unsigned int clusters; | |
660 | ||
661 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
662 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
663 | clusters = (unsigned int)(bytes >> cl_bits); | |
664 | ||
665 | return clusters; | |
666 | } | |
667 | ||
668 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
669 | u64 bytes) | |
670 | { | |
671 | bytes += sb->s_blocksize - 1; | |
672 | return bytes >> sb->s_blocksize_bits; | |
673 | } | |
674 | ||
675 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
676 | u32 clusters) | |
677 | { | |
678 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
679 | } | |
680 | ||
1d46dc08 MF |
681 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
682 | u64 blocks) | |
683 | { | |
684 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; | |
685 | unsigned int clusters; | |
686 | ||
687 | clusters = ocfs2_blocks_to_clusters(sb, blocks); | |
688 | return (u64)clusters << bits; | |
689 | } | |
690 | ||
ccd979bd MF |
691 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
692 | u64 bytes) | |
693 | { | |
694 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
695 | unsigned int clusters; | |
696 | ||
697 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
698 | return (u64)clusters << cl_bits; | |
699 | } | |
700 | ||
701 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
702 | u64 bytes) | |
703 | { | |
704 | u64 blocks; | |
705 | ||
706 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
707 | return blocks << sb->s_blocksize_bits; | |
708 | } | |
709 | ||
710 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
711 | { | |
712 | return (unsigned long)((bytes + 511) >> 9); | |
713 | } | |
714 | ||
9517bac6 MF |
715 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
716 | unsigned long pg_index) | |
717 | { | |
718 | u32 clusters = pg_index; | |
719 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
720 | ||
721 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
722 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
723 | else if (PAGE_CACHE_SHIFT < cbits) | |
724 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
725 | ||
726 | return clusters; | |
727 | } | |
728 | ||
729 | /* | |
730 | * Find the 1st page index which covers the given clusters. | |
731 | */ | |
7c08d70c | 732 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
733 | u32 clusters) |
734 | { | |
735 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 736 | pgoff_t index = clusters; |
9517bac6 MF |
737 | |
738 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 739 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 740 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 741 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
742 | } |
743 | ||
744 | return index; | |
745 | } | |
746 | ||
60b11392 MF |
747 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
748 | { | |
749 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
750 | unsigned int pages_per_cluster = 1; | |
751 | ||
752 | if (PAGE_CACHE_SHIFT < cbits) | |
753 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
754 | ||
755 | return pages_per_cluster; | |
756 | } | |
757 | ||
ebcee4b5 MF |
758 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
759 | unsigned int megs) | |
760 | { | |
761 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
762 | ||
763 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
764 | } | |
765 | ||
ccd979bd MF |
766 | #define ocfs2_set_bit ext2_set_bit |
767 | #define ocfs2_clear_bit ext2_clear_bit | |
768 | #define ocfs2_test_bit ext2_test_bit | |
769 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
70ad1ba7 | 770 | #define ocfs2_find_next_bit ext2_find_next_bit |
ccd979bd MF |
771 | #endif /* OCFS2_H */ |
772 |