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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> |
2b4e30fb JB |
37 | #ifndef CONFIG_OCFS2_COMPAT_JBD |
38 | # include <linux/jbd2.h> | |
39 | #else | |
40 | # include <linux/jbd.h> | |
41 | # include "ocfs2_jbd_compat.h" | |
42 | #endif | |
ccd979bd | 43 | |
8f2c9c1b JB |
44 | /* For union ocfs2_dlm_lksb */ |
45 | #include "stackglue.h" | |
ccd979bd MF |
46 | |
47 | #include "ocfs2_fs.h" | |
ccd979bd MF |
48 | #include "ocfs2_lockid.h" |
49 | ||
73be192b JB |
50 | /* For struct ocfs2_blockcheck_stats */ |
51 | #include "blockcheck.h" | |
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. */ | |
58 | #define OCFS2_INODE_MAX_CACHE_ARRAY 2 | |
59 | ||
60 | struct ocfs2_caching_info { | |
61 | unsigned int ci_num_cached; | |
62 | union { | |
63 | sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY]; | |
64 | struct rb_root ci_tree; | |
65 | } ci_cache; | |
66 | }; | |
67 | ||
68 | /* this limits us to 256 nodes | |
69 | * if we need more, we can do a kmalloc for the map */ | |
70 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
71 | struct ocfs2_node_map { | |
72 | u16 num_nodes; | |
73 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
74 | }; | |
75 | ||
76 | enum ocfs2_ast_action { | |
77 | OCFS2_AST_INVALID = 0, | |
78 | OCFS2_AST_ATTACH, | |
79 | OCFS2_AST_CONVERT, | |
80 | OCFS2_AST_DOWNCONVERT, | |
81 | }; | |
82 | ||
83 | /* actions for an unlockast function to take. */ | |
84 | enum ocfs2_unlock_action { | |
85 | OCFS2_UNLOCK_INVALID = 0, | |
86 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
87 | OCFS2_UNLOCK_DROP_LOCK, | |
88 | }; | |
89 | ||
90 | /* ocfs2_lock_res->l_flags flags. */ | |
3b5da018 | 91 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
ccd979bd MF |
92 | * the lvb */ |
93 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
94 | * dlm_lock */ | |
95 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
96 | * downconvert*/ | |
97 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
98 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
99 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
100 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
101 | * for shutdown paths */ | |
102 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
103 | * when to skip queueing | |
104 | * a lock because it's | |
105 | * about to be | |
106 | * dropped. */ | |
107 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 108 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
109 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
110 | call to dlm_lock. Only | |
111 | exists with BUSY set. */ | |
ccd979bd MF |
112 | |
113 | struct ocfs2_lock_res_ops; | |
114 | ||
115 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
116 | ||
117 | struct ocfs2_lock_res { | |
118 | void *l_priv; | |
119 | struct ocfs2_lock_res_ops *l_ops; | |
120 | spinlock_t l_lock; | |
121 | ||
122 | struct list_head l_blocked_list; | |
123 | struct list_head l_mask_waiters; | |
124 | ||
125 | enum ocfs2_lock_type l_type; | |
126 | unsigned long l_flags; | |
127 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
128 | int l_level; | |
129 | unsigned int l_ro_holders; | |
130 | unsigned int l_ex_holders; | |
8f2c9c1b | 131 | union ocfs2_dlm_lksb l_lksb; |
ccd979bd MF |
132 | |
133 | /* used from AST/BAST funcs. */ | |
134 | enum ocfs2_ast_action l_action; | |
135 | enum ocfs2_unlock_action l_unlock_action; | |
136 | int l_requested; | |
137 | int l_blocking; | |
de551246 | 138 | unsigned int l_pending_gen; |
ccd979bd MF |
139 | |
140 | wait_queue_head_t l_event; | |
141 | ||
142 | struct list_head l_debug_list; | |
8ddb7b00 SM |
143 | |
144 | #ifdef CONFIG_OCFS2_FS_STATS | |
145 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
146 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
147 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
148 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
149 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
150 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
151 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
152 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
153 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
154 | #endif | |
ccd979bd MF |
155 | }; |
156 | ||
83273932 SE |
157 | struct ocfs2_orphan_scan { |
158 | struct mutex os_lock; | |
159 | struct ocfs2_super *os_osb; | |
160 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ | |
161 | struct delayed_work os_orphan_scan_work; | |
15633a22 SE |
162 | struct timespec os_scantime; /* time this node ran the scan */ |
163 | u32 os_count; /* tracks node specific scans */ | |
164 | u32 os_seqno; /* tracks cluster wide scans */ | |
83273932 SE |
165 | }; |
166 | ||
ccd979bd MF |
167 | struct ocfs2_dlm_debug { |
168 | struct kref d_refcnt; | |
169 | struct dentry *d_locking_state; | |
170 | struct list_head d_lockres_tracking; | |
171 | }; | |
172 | ||
173 | enum ocfs2_vol_state | |
174 | { | |
175 | VOLUME_INIT = 0, | |
176 | VOLUME_MOUNTED, | |
19ece546 | 177 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
178 | VOLUME_DISMOUNTED, |
179 | VOLUME_DISABLED | |
180 | }; | |
181 | ||
182 | struct ocfs2_alloc_stats | |
183 | { | |
184 | atomic_t moves; | |
185 | atomic_t local_data; | |
186 | atomic_t bitmap_data; | |
187 | atomic_t bg_allocs; | |
188 | atomic_t bg_extends; | |
189 | }; | |
190 | ||
191 | enum ocfs2_local_alloc_state | |
192 | { | |
9c7af40b MF |
193 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
194 | * this mountpoint. */ | |
195 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
196 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
197 | * of bits has been reduced. */ | |
198 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
199 | * disabled. */ | |
ccd979bd MF |
200 | }; |
201 | ||
202 | enum ocfs2_mount_options | |
203 | { | |
204 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
205 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
206 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
207 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
208 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 209 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 210 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 211 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
929fb014 | 212 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* POSIX access control lists */ |
19ece546 JK |
213 | OCFS2_MOUNT_USRQUOTA = 1 << 9, /* We support user quotas */ |
214 | OCFS2_MOUNT_GRPQUOTA = 1 << 10, /* We support group quotas */ | |
ccd979bd MF |
215 | }; |
216 | ||
217 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
218 | #define OCFS2_OSB_HARD_RO 0x0002 | |
219 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
7f1a37e3 | 220 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 |
ccd979bd MF |
221 | |
222 | struct ocfs2_journal; | |
d85b20e4 | 223 | struct ocfs2_slot_info; |
553abd04 | 224 | struct ocfs2_recovery_map; |
9140db04 | 225 | struct ocfs2_replay_map; |
2205363d | 226 | struct ocfs2_quota_recovery; |
ea455f8a | 227 | struct ocfs2_dentry_lock; |
ccd979bd MF |
228 | struct ocfs2_super |
229 | { | |
ccd979bd MF |
230 | struct task_struct *commit_task; |
231 | struct super_block *sb; | |
232 | struct inode *root_inode; | |
233 | struct inode *sys_root_inode; | |
234 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
235 | ||
236 | struct ocfs2_slot_info *slot_info; | |
237 | ||
539d8264 SM |
238 | u32 *slot_recovery_generations; |
239 | ||
ccd979bd | 240 | spinlock_t node_map_lock; |
ccd979bd | 241 | |
ccd979bd MF |
242 | u64 root_blkno; |
243 | u64 system_dir_blkno; | |
244 | u64 bitmap_blkno; | |
245 | u32 bitmap_cpg; | |
246 | u8 *uuid; | |
247 | char *uuid_str; | |
cf1d6c76 | 248 | u32 uuid_hash; |
ccd979bd MF |
249 | u8 *vol_label; |
250 | u64 first_cluster_group_blkno; | |
251 | u32 fs_generation; | |
252 | ||
253 | u32 s_feature_compat; | |
254 | u32 s_feature_incompat; | |
255 | u32 s_feature_ro_compat; | |
256 | ||
4d0ddb2c TM |
257 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
258 | * Could protect more on osb as it's very short lived. | |
259 | */ | |
ccd979bd MF |
260 | spinlock_t osb_lock; |
261 | u32 s_next_generation; | |
262 | unsigned long osb_flags; | |
4d0ddb2c TM |
263 | s16 s_inode_steal_slot; |
264 | atomic_t s_num_inodes_stolen; | |
ccd979bd MF |
265 | |
266 | unsigned long s_mount_opt; | |
7f1a37e3 | 267 | unsigned int s_atime_quantum; |
ccd979bd | 268 | |
fc881fa0 | 269 | unsigned int max_slots; |
19fdb624 | 270 | unsigned int node_num; |
fc881fa0 JB |
271 | int slot_num; |
272 | int preferred_slot; | |
ccd979bd MF |
273 | int s_sectsize_bits; |
274 | int s_clustersize; | |
275 | int s_clustersize_bits; | |
fdd77704 | 276 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
277 | |
278 | atomic_t vol_state; | |
c74ec2f7 | 279 | struct mutex recovery_lock; |
553abd04 | 280 | struct ocfs2_recovery_map *recovery_map; |
9140db04 | 281 | struct ocfs2_replay_map *replay_map; |
ccd979bd MF |
282 | struct task_struct *recovery_thread_task; |
283 | int disable_recovery; | |
284 | wait_queue_head_t checkpoint_event; | |
285 | atomic_t needs_checkpoint; | |
286 | struct ocfs2_journal *journal; | |
d147b3d6 | 287 | unsigned long osb_commit_interval; |
ccd979bd | 288 | |
9c7af40b MF |
289 | struct delayed_work la_enable_wq; |
290 | ||
291 | /* | |
292 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
293 | * local_alloc_bits. Reads can be done under either lock. | |
294 | */ | |
ebcee4b5 | 295 | unsigned int local_alloc_bits; |
9c7af40b MF |
296 | unsigned int local_alloc_default_bits; |
297 | ||
298 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
299 | * by osb_lock */ | |
300 | ||
ccd979bd | 301 | struct buffer_head *local_alloc_bh; |
9c7af40b | 302 | |
883d4cae | 303 | u64 la_last_gd; |
ccd979bd | 304 | |
2205363d | 305 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
306 | * mount. */ |
307 | int dirty; | |
308 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 309 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd | 310 | |
73be192b | 311 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
ccd979bd MF |
312 | struct ocfs2_alloc_stats alloc_stats; |
313 | char dev_str[20]; /* "major,minor" of the device */ | |
314 | ||
b61817e1 | 315 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 316 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
317 | struct ocfs2_lock_res osb_super_lockres; |
318 | struct ocfs2_lock_res osb_rename_lockres; | |
6ca497a8 | 319 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
ccd979bd MF |
320 | struct ocfs2_dlm_debug *osb_dlm_debug; |
321 | ||
322 | struct dentry *osb_debug_root; | |
50397507 | 323 | struct dentry *osb_ctxt; |
ccd979bd MF |
324 | |
325 | wait_queue_head_t recovery_event; | |
326 | ||
34d024f8 MF |
327 | spinlock_t dc_task_lock; |
328 | struct task_struct *dc_task; | |
329 | wait_queue_head_t dc_event; | |
330 | unsigned long dc_wake_sequence; | |
331 | unsigned long dc_work_sequence; | |
ccd979bd | 332 | |
7ec373cf MF |
333 | /* |
334 | * Any thread can add locks to the list, but the downconvert | |
335 | * thread is the only one allowed to remove locks. Any change | |
336 | * to this rule requires updating | |
337 | * ocfs2_downconvert_thread_do_work(). | |
338 | */ | |
ccd979bd MF |
339 | struct list_head blocked_lock_list; |
340 | unsigned long blocked_lock_count; | |
341 | ||
ea455f8a JK |
342 | /* List of dentry locks to release. Anyone can add locks to |
343 | * the list, ocfs2_wq processes the list */ | |
344 | struct ocfs2_dentry_lock *dentry_lock_list; | |
345 | struct work_struct dentry_lock_work; | |
346 | ||
ccd979bd MF |
347 | wait_queue_head_t osb_mount_event; |
348 | ||
349 | /* Truncate log info */ | |
350 | struct inode *osb_tl_inode; | |
351 | struct buffer_head *osb_tl_bh; | |
c4028958 | 352 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
353 | |
354 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
355 | unsigned int *osb_orphan_wipes; | |
356 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a | 357 | |
83273932 SE |
358 | struct ocfs2_orphan_scan osb_orphan_scan; |
359 | ||
c8b9cf9a TM |
360 | /* used to protect metaecc calculation check of xattr. */ |
361 | spinlock_t osb_xattr_lock; | |
9b7895ef MF |
362 | |
363 | unsigned int osb_dx_mask; | |
364 | u32 osb_dx_seed[4]; | |
feb473a6 TM |
365 | |
366 | /* the group we used to allocate inodes. */ | |
367 | u64 osb_inode_alloc_group; | |
ccd979bd MF |
368 | }; |
369 | ||
370 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 371 | |
13723d00 JB |
372 | /* Useful typedef for passing around journal access functions */ |
373 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, struct inode *inode, | |
374 | struct buffer_head *bh, int type); | |
375 | ||
ccd979bd MF |
376 | static inline int ocfs2_should_order_data(struct inode *inode) |
377 | { | |
378 | if (!S_ISREG(inode->i_mode)) | |
379 | return 0; | |
380 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
381 | return 0; | |
382 | return 1; | |
383 | } | |
384 | ||
dcd0538f MF |
385 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
386 | { | |
387 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
388 | return 1; | |
389 | return 0; | |
390 | } | |
391 | ||
328d5752 MF |
392 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
393 | { | |
394 | /* | |
395 | * Support for sparse files is a pre-requisite | |
396 | */ | |
397 | if (!ocfs2_sparse_alloc(osb)) | |
398 | return 0; | |
399 | ||
400 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
401 | return 1; | |
402 | return 0; | |
403 | } | |
404 | ||
15b1e36b MF |
405 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
406 | { | |
407 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
408 | return 1; | |
409 | return 0; | |
410 | } | |
411 | ||
8154da3d TY |
412 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
413 | { | |
414 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
415 | return 1; | |
416 | return 0; | |
417 | } | |
418 | ||
70ad1ba7 JB |
419 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
420 | { | |
421 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
422 | return 1; | |
423 | return 0; | |
424 | } | |
425 | ||
9b7895ef MF |
426 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
427 | { | |
428 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) | |
429 | return 1; | |
430 | return 0; | |
431 | } | |
432 | ||
198a1ca3 MF |
433 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
434 | { | |
435 | if (ocfs2_supports_indexed_dirs(osb)) | |
436 | return OCFS2_DX_LINK_MAX; | |
437 | return OCFS2_LINK_MAX; | |
438 | } | |
439 | ||
440 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) | |
441 | { | |
442 | u32 nlink = le16_to_cpu(di->i_links_count); | |
443 | u32 hi = le16_to_cpu(di->i_links_count_hi); | |
444 | ||
445 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) | |
446 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); | |
447 | ||
448 | return nlink; | |
449 | } | |
450 | ||
451 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) | |
452 | { | |
453 | u16 lo, hi; | |
454 | ||
455 | lo = nlink; | |
456 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; | |
457 | ||
458 | di->i_links_count = cpu_to_le16(lo); | |
459 | di->i_links_count_hi = cpu_to_le16(hi); | |
460 | } | |
461 | ||
462 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) | |
463 | { | |
464 | u32 links = ocfs2_read_links_count(di); | |
465 | ||
466 | links += n; | |
467 | ||
468 | ocfs2_set_links_count(di, links); | |
469 | } | |
470 | ||
ccd979bd MF |
471 | /* set / clear functions because cluster events can make these happen |
472 | * in parallel so we want the transitions to be atomic. this also | |
473 | * means that any future flags osb_flags must be protected by spinlock | |
474 | * too! */ | |
475 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
476 | unsigned long flag) | |
477 | { | |
478 | spin_lock(&osb->osb_lock); | |
479 | osb->osb_flags |= flag; | |
480 | spin_unlock(&osb->osb_lock); | |
481 | } | |
482 | ||
483 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, | |
484 | int hard) | |
485 | { | |
486 | spin_lock(&osb->osb_lock); | |
487 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
488 | if (hard) | |
489 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
490 | else | |
491 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
492 | spin_unlock(&osb->osb_lock); | |
493 | } | |
494 | ||
495 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
496 | { | |
497 | int ret; | |
498 | ||
499 | spin_lock(&osb->osb_lock); | |
500 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
501 | spin_unlock(&osb->osb_lock); | |
502 | ||
503 | return ret; | |
504 | } | |
505 | ||
506 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | spin_lock(&osb->osb_lock); | |
511 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
512 | spin_unlock(&osb->osb_lock); | |
513 | ||
514 | return ret; | |
515 | } | |
516 | ||
b61817e1 JB |
517 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
518 | { | |
519 | return (osb->s_feature_incompat & | |
520 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
521 | } | |
522 | ||
c271c5c2 SM |
523 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
524 | { | |
525 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
526 | } | |
527 | ||
386a2ef8 JB |
528 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
529 | { | |
530 | return (osb->s_feature_incompat & | |
531 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
532 | } | |
533 | ||
534 | ||
ccd979bd MF |
535 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
536 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
537 | ||
ccd979bd MF |
538 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
539 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
540 | ||
ccd979bd MF |
541 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
542 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
543 | ||
ccd979bd | 544 | |
f6087fb7 JB |
545 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
546 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
547 | ||
87d35a74 MF |
548 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
549 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
550 | ||
9b7895ef MF |
551 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
552 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) | |
553 | ||
554 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ | |
555 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) | |
556 | ||
ccd979bd MF |
557 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
558 | u64 blkno) | |
559 | { | |
560 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
561 | } | |
562 | ||
563 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
564 | u32 clusters) | |
565 | { | |
566 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
567 | sb->s_blocksize_bits; | |
568 | ||
569 | return (u64)clusters << c_to_b_bits; | |
570 | } | |
571 | ||
572 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
573 | u64 blocks) | |
574 | { | |
575 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
576 | sb->s_blocksize_bits; | |
577 | ||
578 | return (u32)(blocks >> b_to_c_bits); | |
579 | } | |
580 | ||
581 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
582 | u64 bytes) | |
583 | { | |
584 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
585 | unsigned int clusters; | |
586 | ||
587 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
588 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
589 | clusters = (unsigned int)(bytes >> cl_bits); | |
590 | ||
591 | return clusters; | |
592 | } | |
593 | ||
594 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
595 | u64 bytes) | |
596 | { | |
597 | bytes += sb->s_blocksize - 1; | |
598 | return bytes >> sb->s_blocksize_bits; | |
599 | } | |
600 | ||
601 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
602 | u32 clusters) | |
603 | { | |
604 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
605 | } | |
606 | ||
1d46dc08 MF |
607 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
608 | u64 blocks) | |
609 | { | |
610 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; | |
611 | unsigned int clusters; | |
612 | ||
613 | clusters = ocfs2_blocks_to_clusters(sb, blocks); | |
614 | return (u64)clusters << bits; | |
615 | } | |
616 | ||
ccd979bd MF |
617 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
618 | u64 bytes) | |
619 | { | |
620 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
621 | unsigned int clusters; | |
622 | ||
623 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
624 | return (u64)clusters << cl_bits; | |
625 | } | |
626 | ||
627 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
628 | u64 bytes) | |
629 | { | |
630 | u64 blocks; | |
631 | ||
632 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
633 | return blocks << sb->s_blocksize_bits; | |
634 | } | |
635 | ||
636 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
637 | { | |
638 | return (unsigned long)((bytes + 511) >> 9); | |
639 | } | |
640 | ||
9517bac6 MF |
641 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
642 | unsigned long pg_index) | |
643 | { | |
644 | u32 clusters = pg_index; | |
645 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
646 | ||
647 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
648 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
649 | else if (PAGE_CACHE_SHIFT < cbits) | |
650 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
651 | ||
652 | return clusters; | |
653 | } | |
654 | ||
655 | /* | |
656 | * Find the 1st page index which covers the given clusters. | |
657 | */ | |
7c08d70c | 658 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
659 | u32 clusters) |
660 | { | |
661 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 662 | pgoff_t index = clusters; |
9517bac6 MF |
663 | |
664 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 665 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 666 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 667 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
668 | } |
669 | ||
670 | return index; | |
671 | } | |
672 | ||
60b11392 MF |
673 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
674 | { | |
675 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
676 | unsigned int pages_per_cluster = 1; | |
677 | ||
678 | if (PAGE_CACHE_SHIFT < cbits) | |
679 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
680 | ||
681 | return pages_per_cluster; | |
682 | } | |
683 | ||
ebcee4b5 MF |
684 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
685 | unsigned int megs) | |
686 | { | |
687 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
688 | ||
689 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
690 | } | |
691 | ||
4d0ddb2c TM |
692 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
693 | { | |
694 | spin_lock(&osb->osb_lock); | |
695 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
696 | spin_unlock(&osb->osb_lock); | |
697 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
698 | } | |
699 | ||
700 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, | |
701 | s16 slot) | |
702 | { | |
703 | spin_lock(&osb->osb_lock); | |
704 | osb->s_inode_steal_slot = slot; | |
705 | spin_unlock(&osb->osb_lock); | |
706 | } | |
707 | ||
708 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
709 | { | |
710 | s16 slot; | |
711 | ||
712 | spin_lock(&osb->osb_lock); | |
713 | slot = osb->s_inode_steal_slot; | |
714 | spin_unlock(&osb->osb_lock); | |
715 | ||
716 | return slot; | |
717 | } | |
718 | ||
ccd979bd MF |
719 | #define ocfs2_set_bit ext2_set_bit |
720 | #define ocfs2_clear_bit ext2_clear_bit | |
721 | #define ocfs2_test_bit ext2_test_bit | |
722 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
70ad1ba7 | 723 | #define ocfs2_find_next_bit ext2_find_next_bit |
ccd979bd MF |
724 | #endif /* OCFS2_H */ |
725 |