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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> |
2b4e30fb JB |
38 | #ifndef CONFIG_OCFS2_COMPAT_JBD |
39 | # include <linux/jbd2.h> | |
40 | #else | |
41 | # include <linux/jbd.h> | |
42 | # include "ocfs2_jbd_compat.h" | |
43 | #endif | |
ccd979bd | 44 | |
8f2c9c1b JB |
45 | /* For union ocfs2_dlm_lksb */ |
46 | #include "stackglue.h" | |
ccd979bd MF |
47 | |
48 | #include "ocfs2_fs.h" | |
ccd979bd MF |
49 | #include "ocfs2_lockid.h" |
50 | ||
73be192b JB |
51 | /* For struct ocfs2_blockcheck_stats */ |
52 | #include "blockcheck.h" | |
53 | ||
47460d65 JB |
54 | |
55 | /* Caching of metadata buffers */ | |
56 | ||
ccd979bd MF |
57 | /* Most user visible OCFS2 inodes will have very few pieces of |
58 | * metadata, but larger files (including bitmaps, etc) must be taken | |
59 | * into account when designing an access scheme. We allow a small | |
60 | * amount of inlined blocks to be stored on an array and grow the | |
61 | * structure into a rb tree when necessary. */ | |
47460d65 JB |
62 | #define OCFS2_CACHE_INFO_MAX_ARRAY 2 |
63 | ||
64 | /* Flags for ocfs2_caching_info */ | |
65 | ||
66 | enum ocfs2_caching_info_flags { | |
67 | /* Indicates that the metadata cache is using the inline array */ | |
68 | OCFS2_CACHE_FL_INLINE = 1<<1, | |
69 | }; | |
ccd979bd MF |
70 | |
71 | struct ocfs2_caching_info { | |
47460d65 JB |
72 | /* |
73 | * The parent structure provides the locks, but because the | |
74 | * parent structure can differ, struct ocfs2_caching_info needs | |
75 | * its own pointers to them. | |
76 | */ | |
77 | spinlock_t *ci_lock; | |
78 | struct mutex *ci_io_mutex; | |
79 | ||
80 | unsigned int ci_flags; | |
ccd979bd MF |
81 | unsigned int ci_num_cached; |
82 | union { | |
47460d65 | 83 | sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; |
ccd979bd MF |
84 | struct rb_root ci_tree; |
85 | } ci_cache; | |
86 | }; | |
87 | ||
88 | /* this limits us to 256 nodes | |
89 | * if we need more, we can do a kmalloc for the map */ | |
90 | #define OCFS2_NODE_MAP_MAX_NODES 256 | |
91 | struct ocfs2_node_map { | |
92 | u16 num_nodes; | |
93 | unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; | |
94 | }; | |
95 | ||
96 | enum ocfs2_ast_action { | |
97 | OCFS2_AST_INVALID = 0, | |
98 | OCFS2_AST_ATTACH, | |
99 | OCFS2_AST_CONVERT, | |
100 | OCFS2_AST_DOWNCONVERT, | |
101 | }; | |
102 | ||
103 | /* actions for an unlockast function to take. */ | |
104 | enum ocfs2_unlock_action { | |
105 | OCFS2_UNLOCK_INVALID = 0, | |
106 | OCFS2_UNLOCK_CANCEL_CONVERT, | |
107 | OCFS2_UNLOCK_DROP_LOCK, | |
108 | }; | |
109 | ||
110 | /* ocfs2_lock_res->l_flags flags. */ | |
3b5da018 | 111 | #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized |
ccd979bd MF |
112 | * the lvb */ |
113 | #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in | |
114 | * dlm_lock */ | |
115 | #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to | |
116 | * downconvert*/ | |
117 | #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ | |
118 | #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) | |
119 | #define OCFS2_LOCK_REFRESHING (0x00000020) | |
120 | #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization | |
121 | * for shutdown paths */ | |
122 | #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track | |
123 | * when to skip queueing | |
124 | * a lock because it's | |
125 | * about to be | |
126 | * dropped. */ | |
127 | #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ | |
cf8e06f1 | 128 | #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ |
de551246 JB |
129 | #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a |
130 | call to dlm_lock. Only | |
131 | exists with BUSY set. */ | |
ccd979bd MF |
132 | |
133 | struct ocfs2_lock_res_ops; | |
134 | ||
135 | typedef void (*ocfs2_lock_callback)(int status, unsigned long data); | |
136 | ||
137 | struct ocfs2_lock_res { | |
138 | void *l_priv; | |
139 | struct ocfs2_lock_res_ops *l_ops; | |
140 | spinlock_t l_lock; | |
141 | ||
142 | struct list_head l_blocked_list; | |
143 | struct list_head l_mask_waiters; | |
144 | ||
145 | enum ocfs2_lock_type l_type; | |
146 | unsigned long l_flags; | |
147 | char l_name[OCFS2_LOCK_ID_MAX_LEN]; | |
148 | int l_level; | |
149 | unsigned int l_ro_holders; | |
150 | unsigned int l_ex_holders; | |
8f2c9c1b | 151 | union ocfs2_dlm_lksb l_lksb; |
ccd979bd MF |
152 | |
153 | /* used from AST/BAST funcs. */ | |
154 | enum ocfs2_ast_action l_action; | |
155 | enum ocfs2_unlock_action l_unlock_action; | |
156 | int l_requested; | |
157 | int l_blocking; | |
de551246 | 158 | unsigned int l_pending_gen; |
ccd979bd MF |
159 | |
160 | wait_queue_head_t l_event; | |
161 | ||
162 | struct list_head l_debug_list; | |
8ddb7b00 SM |
163 | |
164 | #ifdef CONFIG_OCFS2_FS_STATS | |
165 | unsigned long long l_lock_num_prmode; /* PR acquires */ | |
166 | unsigned long long l_lock_num_exmode; /* EX acquires */ | |
167 | unsigned int l_lock_num_prmode_failed; /* Failed PR gets */ | |
168 | unsigned int l_lock_num_exmode_failed; /* Failed EX gets */ | |
169 | unsigned long long l_lock_total_prmode; /* Tot wait for PR */ | |
170 | unsigned long long l_lock_total_exmode; /* Tot wait for EX */ | |
171 | unsigned int l_lock_max_prmode; /* Max wait for PR */ | |
172 | unsigned int l_lock_max_exmode; /* Max wait for EX */ | |
173 | unsigned int l_lock_refresh; /* Disk refreshes */ | |
174 | #endif | |
cb25797d JK |
175 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
176 | struct lockdep_map l_lockdep_map; | |
177 | #endif | |
ccd979bd MF |
178 | }; |
179 | ||
692684e1 SM |
180 | enum ocfs2_orphan_scan_state { |
181 | ORPHAN_SCAN_ACTIVE, | |
182 | ORPHAN_SCAN_INACTIVE | |
183 | }; | |
184 | ||
83273932 SE |
185 | struct ocfs2_orphan_scan { |
186 | struct mutex os_lock; | |
187 | struct ocfs2_super *os_osb; | |
188 | struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ | |
189 | struct delayed_work os_orphan_scan_work; | |
15633a22 SE |
190 | struct timespec os_scantime; /* time this node ran the scan */ |
191 | u32 os_count; /* tracks node specific scans */ | |
192 | u32 os_seqno; /* tracks cluster wide scans */ | |
692684e1 | 193 | atomic_t os_state; /* ACTIVE or INACTIVE */ |
83273932 SE |
194 | }; |
195 | ||
ccd979bd MF |
196 | struct ocfs2_dlm_debug { |
197 | struct kref d_refcnt; | |
198 | struct dentry *d_locking_state; | |
199 | struct list_head d_lockres_tracking; | |
200 | }; | |
201 | ||
202 | enum ocfs2_vol_state | |
203 | { | |
204 | VOLUME_INIT = 0, | |
205 | VOLUME_MOUNTED, | |
19ece546 | 206 | VOLUME_MOUNTED_QUOTAS, |
ccd979bd MF |
207 | VOLUME_DISMOUNTED, |
208 | VOLUME_DISABLED | |
209 | }; | |
210 | ||
211 | struct ocfs2_alloc_stats | |
212 | { | |
213 | atomic_t moves; | |
214 | atomic_t local_data; | |
215 | atomic_t bitmap_data; | |
216 | atomic_t bg_allocs; | |
217 | atomic_t bg_extends; | |
218 | }; | |
219 | ||
220 | enum ocfs2_local_alloc_state | |
221 | { | |
9c7af40b MF |
222 | OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for |
223 | * this mountpoint. */ | |
224 | OCFS2_LA_ENABLED, /* Local alloc is in use. */ | |
225 | OCFS2_LA_THROTTLED, /* Local alloc is in use, but number | |
226 | * of bits has been reduced. */ | |
227 | OCFS2_LA_DISABLED /* Local alloc has temporarily been | |
228 | * disabled. */ | |
ccd979bd MF |
229 | }; |
230 | ||
231 | enum ocfs2_mount_options | |
232 | { | |
233 | OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */ | |
234 | OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ | |
235 | OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ | |
236 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
237 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
53fc622b | 238 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ |
cf1d6c76 | 239 | OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ |
12462f1d | 240 | OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ |
929fb014 | 241 | OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* POSIX access control lists */ |
19ece546 JK |
242 | OCFS2_MOUNT_USRQUOTA = 1 << 9, /* We support user quotas */ |
243 | OCFS2_MOUNT_GRPQUOTA = 1 << 10, /* We support group quotas */ | |
ccd979bd MF |
244 | }; |
245 | ||
f7b1aa69 JK |
246 | #define OCFS2_OSB_SOFT_RO 0x0001 |
247 | #define OCFS2_OSB_HARD_RO 0x0002 | |
248 | #define OCFS2_OSB_ERROR_FS 0x0004 | |
249 | #define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008 | |
250 | ||
251 | #define OCFS2_DEFAULT_ATIME_QUANTUM 60 | |
ccd979bd MF |
252 | |
253 | struct ocfs2_journal; | |
d85b20e4 | 254 | struct ocfs2_slot_info; |
553abd04 | 255 | struct ocfs2_recovery_map; |
9140db04 | 256 | struct ocfs2_replay_map; |
2205363d | 257 | struct ocfs2_quota_recovery; |
ea455f8a | 258 | struct ocfs2_dentry_lock; |
ccd979bd MF |
259 | struct ocfs2_super |
260 | { | |
ccd979bd MF |
261 | struct task_struct *commit_task; |
262 | struct super_block *sb; | |
263 | struct inode *root_inode; | |
264 | struct inode *sys_root_inode; | |
265 | struct inode *system_inodes[NUM_SYSTEM_INODES]; | |
266 | ||
267 | struct ocfs2_slot_info *slot_info; | |
268 | ||
539d8264 SM |
269 | u32 *slot_recovery_generations; |
270 | ||
ccd979bd | 271 | spinlock_t node_map_lock; |
ccd979bd | 272 | |
ccd979bd MF |
273 | u64 root_blkno; |
274 | u64 system_dir_blkno; | |
275 | u64 bitmap_blkno; | |
276 | u32 bitmap_cpg; | |
277 | u8 *uuid; | |
278 | char *uuid_str; | |
cf1d6c76 | 279 | u32 uuid_hash; |
ccd979bd MF |
280 | u8 *vol_label; |
281 | u64 first_cluster_group_blkno; | |
282 | u32 fs_generation; | |
283 | ||
284 | u32 s_feature_compat; | |
285 | u32 s_feature_incompat; | |
286 | u32 s_feature_ro_compat; | |
287 | ||
4d0ddb2c TM |
288 | /* Protects s_next_generation, osb_flags and s_inode_steal_slot. |
289 | * Could protect more on osb as it's very short lived. | |
290 | */ | |
ccd979bd MF |
291 | spinlock_t osb_lock; |
292 | u32 s_next_generation; | |
293 | unsigned long osb_flags; | |
4d0ddb2c TM |
294 | s16 s_inode_steal_slot; |
295 | atomic_t s_num_inodes_stolen; | |
ccd979bd MF |
296 | |
297 | unsigned long s_mount_opt; | |
7f1a37e3 | 298 | unsigned int s_atime_quantum; |
ccd979bd | 299 | |
fc881fa0 | 300 | unsigned int max_slots; |
19fdb624 | 301 | unsigned int node_num; |
fc881fa0 JB |
302 | int slot_num; |
303 | int preferred_slot; | |
ccd979bd MF |
304 | int s_sectsize_bits; |
305 | int s_clustersize; | |
306 | int s_clustersize_bits; | |
fdd77704 | 307 | unsigned int s_xattr_inline_size; |
ccd979bd MF |
308 | |
309 | atomic_t vol_state; | |
c74ec2f7 | 310 | struct mutex recovery_lock; |
553abd04 | 311 | struct ocfs2_recovery_map *recovery_map; |
9140db04 | 312 | struct ocfs2_replay_map *replay_map; |
ccd979bd MF |
313 | struct task_struct *recovery_thread_task; |
314 | int disable_recovery; | |
315 | wait_queue_head_t checkpoint_event; | |
316 | atomic_t needs_checkpoint; | |
317 | struct ocfs2_journal *journal; | |
d147b3d6 | 318 | unsigned long osb_commit_interval; |
ccd979bd | 319 | |
9c7af40b MF |
320 | struct delayed_work la_enable_wq; |
321 | ||
322 | /* | |
323 | * Must hold local alloc i_mutex and osb->osb_lock to change | |
324 | * local_alloc_bits. Reads can be done under either lock. | |
325 | */ | |
ebcee4b5 | 326 | unsigned int local_alloc_bits; |
9c7af40b MF |
327 | unsigned int local_alloc_default_bits; |
328 | ||
329 | enum ocfs2_local_alloc_state local_alloc_state; /* protected | |
330 | * by osb_lock */ | |
331 | ||
ccd979bd | 332 | struct buffer_head *local_alloc_bh; |
9c7af40b | 333 | |
883d4cae | 334 | u64 la_last_gd; |
ccd979bd | 335 | |
2205363d | 336 | /* Next three fields are for local node slot recovery during |
ccd979bd MF |
337 | * mount. */ |
338 | int dirty; | |
339 | struct ocfs2_dinode *local_alloc_copy; | |
2205363d | 340 | struct ocfs2_quota_recovery *quota_rec; |
ccd979bd | 341 | |
73be192b | 342 | struct ocfs2_blockcheck_stats osb_ecc_stats; |
ccd979bd MF |
343 | struct ocfs2_alloc_stats alloc_stats; |
344 | char dev_str[20]; /* "major,minor" of the device */ | |
345 | ||
b61817e1 | 346 | char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; |
4670c46d | 347 | struct ocfs2_cluster_connection *cconn; |
ccd979bd MF |
348 | struct ocfs2_lock_res osb_super_lockres; |
349 | struct ocfs2_lock_res osb_rename_lockres; | |
6ca497a8 | 350 | struct ocfs2_lock_res osb_nfs_sync_lockres; |
ccd979bd MF |
351 | struct ocfs2_dlm_debug *osb_dlm_debug; |
352 | ||
353 | struct dentry *osb_debug_root; | |
50397507 | 354 | struct dentry *osb_ctxt; |
ccd979bd MF |
355 | |
356 | wait_queue_head_t recovery_event; | |
357 | ||
34d024f8 MF |
358 | spinlock_t dc_task_lock; |
359 | struct task_struct *dc_task; | |
360 | wait_queue_head_t dc_event; | |
361 | unsigned long dc_wake_sequence; | |
362 | unsigned long dc_work_sequence; | |
ccd979bd | 363 | |
7ec373cf MF |
364 | /* |
365 | * Any thread can add locks to the list, but the downconvert | |
366 | * thread is the only one allowed to remove locks. Any change | |
367 | * to this rule requires updating | |
368 | * ocfs2_downconvert_thread_do_work(). | |
369 | */ | |
ccd979bd MF |
370 | struct list_head blocked_lock_list; |
371 | unsigned long blocked_lock_count; | |
372 | ||
ea455f8a JK |
373 | /* List of dentry locks to release. Anyone can add locks to |
374 | * the list, ocfs2_wq processes the list */ | |
375 | struct ocfs2_dentry_lock *dentry_lock_list; | |
376 | struct work_struct dentry_lock_work; | |
377 | ||
ccd979bd MF |
378 | wait_queue_head_t osb_mount_event; |
379 | ||
380 | /* Truncate log info */ | |
381 | struct inode *osb_tl_inode; | |
382 | struct buffer_head *osb_tl_bh; | |
c4028958 | 383 | struct delayed_work osb_truncate_log_wq; |
b4df6ed8 MF |
384 | |
385 | struct ocfs2_node_map osb_recovering_orphan_dirs; | |
386 | unsigned int *osb_orphan_wipes; | |
387 | wait_queue_head_t osb_wipe_event; | |
c8b9cf9a | 388 | |
83273932 SE |
389 | struct ocfs2_orphan_scan osb_orphan_scan; |
390 | ||
c8b9cf9a TM |
391 | /* used to protect metaecc calculation check of xattr. */ |
392 | spinlock_t osb_xattr_lock; | |
9b7895ef MF |
393 | |
394 | unsigned int osb_dx_mask; | |
395 | u32 osb_dx_seed[4]; | |
feb473a6 TM |
396 | |
397 | /* the group we used to allocate inodes. */ | |
398 | u64 osb_inode_alloc_group; | |
ccd979bd MF |
399 | }; |
400 | ||
401 | #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) | |
ccd979bd | 402 | |
13723d00 JB |
403 | /* Useful typedef for passing around journal access functions */ |
404 | typedef int (*ocfs2_journal_access_func)(handle_t *handle, struct inode *inode, | |
405 | struct buffer_head *bh, int type); | |
406 | ||
ccd979bd MF |
407 | static inline int ocfs2_should_order_data(struct inode *inode) |
408 | { | |
409 | if (!S_ISREG(inode->i_mode)) | |
410 | return 0; | |
411 | if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) | |
412 | return 0; | |
413 | return 1; | |
414 | } | |
415 | ||
dcd0538f MF |
416 | static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) |
417 | { | |
418 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) | |
419 | return 1; | |
420 | return 0; | |
421 | } | |
422 | ||
328d5752 MF |
423 | static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) |
424 | { | |
425 | /* | |
426 | * Support for sparse files is a pre-requisite | |
427 | */ | |
428 | if (!ocfs2_sparse_alloc(osb)) | |
429 | return 0; | |
430 | ||
431 | if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) | |
432 | return 1; | |
433 | return 0; | |
434 | } | |
435 | ||
15b1e36b MF |
436 | static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) |
437 | { | |
438 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) | |
439 | return 1; | |
440 | return 0; | |
441 | } | |
442 | ||
8154da3d TY |
443 | static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) |
444 | { | |
445 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) | |
446 | return 1; | |
447 | return 0; | |
448 | } | |
449 | ||
70ad1ba7 JB |
450 | static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) |
451 | { | |
452 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) | |
453 | return 1; | |
454 | return 0; | |
455 | } | |
456 | ||
9b7895ef MF |
457 | static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) |
458 | { | |
459 | if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) | |
460 | return 1; | |
461 | return 0; | |
462 | } | |
463 | ||
198a1ca3 MF |
464 | static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) |
465 | { | |
466 | if (ocfs2_supports_indexed_dirs(osb)) | |
467 | return OCFS2_DX_LINK_MAX; | |
468 | return OCFS2_LINK_MAX; | |
469 | } | |
470 | ||
471 | static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) | |
472 | { | |
473 | u32 nlink = le16_to_cpu(di->i_links_count); | |
474 | u32 hi = le16_to_cpu(di->i_links_count_hi); | |
475 | ||
476 | if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) | |
477 | nlink |= (hi << OCFS2_LINKS_HI_SHIFT); | |
478 | ||
479 | return nlink; | |
480 | } | |
481 | ||
482 | static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) | |
483 | { | |
484 | u16 lo, hi; | |
485 | ||
486 | lo = nlink; | |
487 | hi = nlink >> OCFS2_LINKS_HI_SHIFT; | |
488 | ||
489 | di->i_links_count = cpu_to_le16(lo); | |
490 | di->i_links_count_hi = cpu_to_le16(hi); | |
491 | } | |
492 | ||
493 | static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) | |
494 | { | |
495 | u32 links = ocfs2_read_links_count(di); | |
496 | ||
497 | links += n; | |
498 | ||
499 | ocfs2_set_links_count(di, links); | |
500 | } | |
501 | ||
ccd979bd MF |
502 | /* set / clear functions because cluster events can make these happen |
503 | * in parallel so we want the transitions to be atomic. this also | |
504 | * means that any future flags osb_flags must be protected by spinlock | |
505 | * too! */ | |
506 | static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, | |
507 | unsigned long flag) | |
508 | { | |
509 | spin_lock(&osb->osb_lock); | |
510 | osb->osb_flags |= flag; | |
511 | spin_unlock(&osb->osb_lock); | |
512 | } | |
513 | ||
f7b1aa69 JK |
514 | |
515 | static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb, | |
516 | unsigned long flag) | |
517 | { | |
518 | unsigned long ret; | |
519 | ||
520 | spin_lock(&osb->osb_lock); | |
521 | ret = osb->osb_flags & flag; | |
522 | spin_unlock(&osb->osb_lock); | |
523 | return ret; | |
524 | } | |
525 | ||
ccd979bd MF |
526 | static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, |
527 | int hard) | |
528 | { | |
529 | spin_lock(&osb->osb_lock); | |
530 | osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); | |
531 | if (hard) | |
532 | osb->osb_flags |= OCFS2_OSB_HARD_RO; | |
533 | else | |
534 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
535 | spin_unlock(&osb->osb_lock); | |
536 | } | |
537 | ||
538 | static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) | |
539 | { | |
540 | int ret; | |
541 | ||
542 | spin_lock(&osb->osb_lock); | |
543 | ret = osb->osb_flags & OCFS2_OSB_HARD_RO; | |
544 | spin_unlock(&osb->osb_lock); | |
545 | ||
546 | return ret; | |
547 | } | |
548 | ||
549 | static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) | |
550 | { | |
551 | int ret; | |
552 | ||
553 | spin_lock(&osb->osb_lock); | |
554 | ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; | |
555 | spin_unlock(&osb->osb_lock); | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
b61817e1 JB |
560 | static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) |
561 | { | |
562 | return (osb->s_feature_incompat & | |
563 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK); | |
564 | } | |
565 | ||
c271c5c2 SM |
566 | static inline int ocfs2_mount_local(struct ocfs2_super *osb) |
567 | { | |
568 | return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); | |
569 | } | |
570 | ||
386a2ef8 JB |
571 | static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) |
572 | { | |
573 | return (osb->s_feature_incompat & | |
574 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); | |
575 | } | |
576 | ||
577 | ||
ccd979bd MF |
578 | #define OCFS2_IS_VALID_DINODE(ptr) \ |
579 | (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) | |
580 | ||
ccd979bd MF |
581 | #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ |
582 | (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) | |
583 | ||
ccd979bd MF |
584 | #define OCFS2_IS_VALID_GROUP_DESC(ptr) \ |
585 | (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) | |
586 | ||
ccd979bd | 587 | |
f6087fb7 JB |
588 | #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ |
589 | (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) | |
590 | ||
87d35a74 MF |
591 | #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ |
592 | (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) | |
593 | ||
9b7895ef MF |
594 | #define OCFS2_IS_VALID_DX_ROOT(ptr) \ |
595 | (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) | |
596 | ||
597 | #define OCFS2_IS_VALID_DX_LEAF(ptr) \ | |
598 | (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) | |
599 | ||
ccd979bd MF |
600 | static inline unsigned long ino_from_blkno(struct super_block *sb, |
601 | u64 blkno) | |
602 | { | |
603 | return (unsigned long)(blkno & (u64)ULONG_MAX); | |
604 | } | |
605 | ||
606 | static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, | |
607 | u32 clusters) | |
608 | { | |
609 | int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
610 | sb->s_blocksize_bits; | |
611 | ||
612 | return (u64)clusters << c_to_b_bits; | |
613 | } | |
614 | ||
615 | static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, | |
616 | u64 blocks) | |
617 | { | |
618 | int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - | |
619 | sb->s_blocksize_bits; | |
620 | ||
621 | return (u32)(blocks >> b_to_c_bits); | |
622 | } | |
623 | ||
624 | static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, | |
625 | u64 bytes) | |
626 | { | |
627 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
628 | unsigned int clusters; | |
629 | ||
630 | bytes += OCFS2_SB(sb)->s_clustersize - 1; | |
631 | /* OCFS2 just cannot have enough clusters to overflow this */ | |
632 | clusters = (unsigned int)(bytes >> cl_bits); | |
633 | ||
634 | return clusters; | |
635 | } | |
636 | ||
637 | static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, | |
638 | u64 bytes) | |
639 | { | |
640 | bytes += sb->s_blocksize - 1; | |
641 | return bytes >> sb->s_blocksize_bits; | |
642 | } | |
643 | ||
644 | static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, | |
645 | u32 clusters) | |
646 | { | |
647 | return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; | |
648 | } | |
649 | ||
1d46dc08 MF |
650 | static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, |
651 | u64 blocks) | |
652 | { | |
653 | int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; | |
654 | unsigned int clusters; | |
655 | ||
656 | clusters = ocfs2_blocks_to_clusters(sb, blocks); | |
657 | return (u64)clusters << bits; | |
658 | } | |
659 | ||
ccd979bd MF |
660 | static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, |
661 | u64 bytes) | |
662 | { | |
663 | int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; | |
664 | unsigned int clusters; | |
665 | ||
666 | clusters = ocfs2_clusters_for_bytes(sb, bytes); | |
667 | return (u64)clusters << cl_bits; | |
668 | } | |
669 | ||
670 | static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, | |
671 | u64 bytes) | |
672 | { | |
673 | u64 blocks; | |
674 | ||
675 | blocks = ocfs2_blocks_for_bytes(sb, bytes); | |
676 | return blocks << sb->s_blocksize_bits; | |
677 | } | |
678 | ||
679 | static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) | |
680 | { | |
681 | return (unsigned long)((bytes + 511) >> 9); | |
682 | } | |
683 | ||
9517bac6 MF |
684 | static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, |
685 | unsigned long pg_index) | |
686 | { | |
687 | u32 clusters = pg_index; | |
688 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
689 | ||
690 | if (unlikely(PAGE_CACHE_SHIFT > cbits)) | |
691 | clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); | |
692 | else if (PAGE_CACHE_SHIFT < cbits) | |
693 | clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); | |
694 | ||
695 | return clusters; | |
696 | } | |
697 | ||
698 | /* | |
699 | * Find the 1st page index which covers the given clusters. | |
700 | */ | |
7c08d70c | 701 | static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, |
9517bac6 MF |
702 | u32 clusters) |
703 | { | |
704 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
7c08d70c | 705 | pgoff_t index = clusters; |
9517bac6 MF |
706 | |
707 | if (PAGE_CACHE_SHIFT > cbits) { | |
7c08d70c | 708 | index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); |
9517bac6 | 709 | } else if (PAGE_CACHE_SHIFT < cbits) { |
7c08d70c | 710 | index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); |
9517bac6 MF |
711 | } |
712 | ||
713 | return index; | |
714 | } | |
715 | ||
60b11392 MF |
716 | static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) |
717 | { | |
718 | unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; | |
719 | unsigned int pages_per_cluster = 1; | |
720 | ||
721 | if (PAGE_CACHE_SHIFT < cbits) | |
722 | pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); | |
723 | ||
724 | return pages_per_cluster; | |
725 | } | |
726 | ||
ebcee4b5 MF |
727 | static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, |
728 | unsigned int megs) | |
729 | { | |
730 | BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); | |
731 | ||
732 | return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); | |
733 | } | |
734 | ||
4d0ddb2c TM |
735 | static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb) |
736 | { | |
737 | spin_lock(&osb->osb_lock); | |
738 | osb->s_inode_steal_slot = OCFS2_INVALID_SLOT; | |
739 | spin_unlock(&osb->osb_lock); | |
740 | atomic_set(&osb->s_num_inodes_stolen, 0); | |
741 | } | |
742 | ||
743 | static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb, | |
744 | s16 slot) | |
745 | { | |
746 | spin_lock(&osb->osb_lock); | |
747 | osb->s_inode_steal_slot = slot; | |
748 | spin_unlock(&osb->osb_lock); | |
749 | } | |
750 | ||
751 | static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb) | |
752 | { | |
753 | s16 slot; | |
754 | ||
755 | spin_lock(&osb->osb_lock); | |
756 | slot = osb->s_inode_steal_slot; | |
757 | spin_unlock(&osb->osb_lock); | |
758 | ||
759 | return slot; | |
760 | } | |
761 | ||
ccd979bd MF |
762 | #define ocfs2_set_bit ext2_set_bit |
763 | #define ocfs2_clear_bit ext2_clear_bit | |
764 | #define ocfs2_test_bit ext2_test_bit | |
765 | #define ocfs2_find_next_zero_bit ext2_find_next_zero_bit | |
70ad1ba7 | 766 | #define ocfs2_find_next_bit ext2_find_next_bit |
ccd979bd MF |
767 | #endif /* OCFS2_H */ |
768 |