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>
36 #include <linux/mutex.h>
37 #include <linux/lockdep.h>
38 #include <linux/jbd2.h>
39
40 /* For union ocfs2_dlm_lksb */
41 #include "stackglue.h"
42
43 #include "ocfs2_fs.h"
44 #include "ocfs2_lockid.h"
45 #include "ocfs2_ioctl.h"
46
47 /* For struct ocfs2_blockcheck_stats */
48 #include "blockcheck.h"
49
50 #include "reservations.h"
51
52 /* Caching of metadata buffers */
53
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. */
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 };
67
68 struct ocfs2_caching_operations;
69 struct ocfs2_caching_info {
70 /*
71 * The parent structure provides the locks, but because the
72 * parent structure can differ, it provides locking operations
73 * to struct ocfs2_caching_info.
74 */
75 const struct ocfs2_caching_operations *ci_ops;
76
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;
80 /* last transaction we were a part of. */
81 unsigned long ci_last_trans;
82
83 /* Cache structures */
84 unsigned int ci_flags;
85 unsigned int ci_num_cached;
86 union {
87 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
88 struct rb_root ci_tree;
89 } ci_cache;
90 };
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);
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. */
120 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
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 */
137 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
138 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
139 call to dlm_lock. Only
140 exists with BUSY set. */
141 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
142 * from downconverting
143 * before the upconvert
144 * has completed */
145
146 struct ocfs2_lock_res_ops;
147
148 typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
149
150 #ifdef CONFIG_OCFS2_FS_STATS
151 struct ocfs2_lock_stats {
152 u64 ls_total; /* Total wait in NSEC */
153 u32 ls_gets; /* Num acquires */
154 u32 ls_fail; /* Num failed acquires */
155
156 /* Storing max wait in usecs saves 24 bytes per inode */
157 u32 ls_max; /* Max wait in USEC */
158 };
159 #endif
160
161 struct ocfs2_lock_res {
162 void *l_priv;
163 struct ocfs2_lock_res_ops *l_ops;
164
165
166 struct list_head l_blocked_list;
167 struct list_head l_mask_waiters;
168
169 unsigned long l_flags;
170 char l_name[OCFS2_LOCK_ID_MAX_LEN];
171 unsigned int l_ro_holders;
172 unsigned int l_ex_holders;
173 signed char l_level;
174 signed char l_requested;
175 signed char l_blocking;
176
177 /* Data packed - type enum ocfs2_lock_type */
178 unsigned char l_type;
179
180 /* used from AST/BAST funcs. */
181 /* Data packed - enum type ocfs2_ast_action */
182 unsigned char l_action;
183 /* Data packed - enum type ocfs2_unlock_action */
184 unsigned char l_unlock_action;
185 unsigned int l_pending_gen;
186
187 spinlock_t l_lock;
188
189 struct ocfs2_dlm_lksb l_lksb;
190
191 wait_queue_head_t l_event;
192
193 struct list_head l_debug_list;
194
195 #ifdef CONFIG_OCFS2_FS_STATS
196 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
197 u32 l_lock_refresh; /* Disk refreshes */
198 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
199 #endif
200 #ifdef CONFIG_DEBUG_LOCK_ALLOC
201 struct lockdep_map l_lockdep_map;
202 #endif
203 };
204
205 enum ocfs2_orphan_scan_state {
206 ORPHAN_SCAN_ACTIVE,
207 ORPHAN_SCAN_INACTIVE
208 };
209
210 struct ocfs2_orphan_scan {
211 struct mutex os_lock;
212 struct ocfs2_super *os_osb;
213 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
214 struct delayed_work os_orphan_scan_work;
215 struct timespec os_scantime; /* time this node ran the scan */
216 u32 os_count; /* tracks node specific scans */
217 u32 os_seqno; /* tracks cluster wide scans */
218 atomic_t os_state; /* ACTIVE or INACTIVE */
219 };
220
221 struct ocfs2_dlm_debug {
222 struct kref d_refcnt;
223 struct dentry *d_locking_state;
224 struct list_head d_lockres_tracking;
225 };
226
227 enum ocfs2_vol_state
228 {
229 VOLUME_INIT = 0,
230 VOLUME_MOUNTED,
231 VOLUME_MOUNTED_QUOTAS,
232 VOLUME_DISMOUNTED,
233 VOLUME_DISABLED
234 };
235
236 struct ocfs2_alloc_stats
237 {
238 atomic_t moves;
239 atomic_t local_data;
240 atomic_t bitmap_data;
241 atomic_t bg_allocs;
242 atomic_t bg_extends;
243 };
244
245 enum ocfs2_local_alloc_state
246 {
247 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
248 * this mountpoint. */
249 OCFS2_LA_ENABLED, /* Local alloc is in use. */
250 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
251 * of bits has been reduced. */
252 OCFS2_LA_DISABLED /* Local alloc has temporarily been
253 * disabled. */
254 };
255
256 enum ocfs2_mount_options
257 {
258 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
259 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
260 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
261 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
262 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
263 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
264 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
265 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
266 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
267 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
268 control lists */
269 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
270 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
271 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
272 writes */
273 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
274 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
275 };
276
277 #define OCFS2_OSB_SOFT_RO 0x0001
278 #define OCFS2_OSB_HARD_RO 0x0002
279 #define OCFS2_OSB_ERROR_FS 0x0004
280 #define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008
281
282 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
283
284 struct ocfs2_journal;
285 struct ocfs2_slot_info;
286 struct ocfs2_recovery_map;
287 struct ocfs2_replay_map;
288 struct ocfs2_quota_recovery;
289 struct ocfs2_dentry_lock;
290 struct ocfs2_super
291 {
292 struct task_struct *commit_task;
293 struct super_block *sb;
294 struct inode *root_inode;
295 struct inode *sys_root_inode;
296 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
297 struct inode **local_system_inodes;
298
299 struct ocfs2_slot_info *slot_info;
300
301 u32 *slot_recovery_generations;
302
303 spinlock_t node_map_lock;
304
305 u64 root_blkno;
306 u64 system_dir_blkno;
307 u64 bitmap_blkno;
308 u32 bitmap_cpg;
309 u8 *uuid;
310 char *uuid_str;
311 u32 uuid_hash;
312 u8 *vol_label;
313 u64 first_cluster_group_blkno;
314 u32 fs_generation;
315
316 u32 s_feature_compat;
317 u32 s_feature_incompat;
318 u32 s_feature_ro_compat;
319
320 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
321 * Could protect more on osb as it's very short lived.
322 */
323 spinlock_t osb_lock;
324 u32 s_next_generation;
325 unsigned long osb_flags;
326 s16 s_inode_steal_slot;
327 s16 s_meta_steal_slot;
328 atomic_t s_num_inodes_stolen;
329 atomic_t s_num_meta_stolen;
330
331 unsigned long s_mount_opt;
332 unsigned int s_atime_quantum;
333
334 unsigned int max_slots;
335 unsigned int node_num;
336 int slot_num;
337 int preferred_slot;
338 int s_sectsize_bits;
339 int s_clustersize;
340 int s_clustersize_bits;
341 unsigned int s_xattr_inline_size;
342
343 atomic_t vol_state;
344 struct mutex recovery_lock;
345 struct ocfs2_recovery_map *recovery_map;
346 struct ocfs2_replay_map *replay_map;
347 struct task_struct *recovery_thread_task;
348 int disable_recovery;
349 wait_queue_head_t checkpoint_event;
350 atomic_t needs_checkpoint;
351 struct ocfs2_journal *journal;
352 unsigned long osb_commit_interval;
353
354 struct delayed_work la_enable_wq;
355
356 /*
357 * Must hold local alloc i_mutex and osb->osb_lock to change
358 * local_alloc_bits. Reads can be done under either lock.
359 */
360 unsigned int local_alloc_bits;
361 unsigned int local_alloc_default_bits;
362 /* osb_clusters_at_boot can become stale! Do not trust it to
363 * be up to date. */
364 unsigned int osb_clusters_at_boot;
365
366 enum ocfs2_local_alloc_state local_alloc_state; /* protected
367 * by osb_lock */
368
369 struct buffer_head *local_alloc_bh;
370
371 u64 la_last_gd;
372
373 struct ocfs2_reservation_map osb_la_resmap;
374
375 unsigned int osb_resv_level;
376 unsigned int osb_dir_resv_level;
377
378 /* Next three fields are for local node slot recovery during
379 * mount. */
380 int dirty;
381 struct ocfs2_dinode *local_alloc_copy;
382 struct ocfs2_quota_recovery *quota_rec;
383
384 struct ocfs2_blockcheck_stats osb_ecc_stats;
385 struct ocfs2_alloc_stats alloc_stats;
386 char dev_str[20]; /* "major,minor" of the device */
387
388 u8 osb_stackflags;
389
390 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
391 struct ocfs2_cluster_connection *cconn;
392 struct ocfs2_lock_res osb_super_lockres;
393 struct ocfs2_lock_res osb_rename_lockres;
394 struct ocfs2_lock_res osb_nfs_sync_lockres;
395 struct ocfs2_dlm_debug *osb_dlm_debug;
396
397 struct dentry *osb_debug_root;
398 struct dentry *osb_ctxt;
399
400 wait_queue_head_t recovery_event;
401
402 spinlock_t dc_task_lock;
403 struct task_struct *dc_task;
404 wait_queue_head_t dc_event;
405 unsigned long dc_wake_sequence;
406 unsigned long dc_work_sequence;
407
408 /*
409 * Any thread can add locks to the list, but the downconvert
410 * thread is the only one allowed to remove locks. Any change
411 * to this rule requires updating
412 * ocfs2_downconvert_thread_do_work().
413 */
414 struct list_head blocked_lock_list;
415 unsigned long blocked_lock_count;
416
417 /* List of dentry locks to release. Anyone can add locks to
418 * the list, ocfs2_wq processes the list */
419 struct ocfs2_dentry_lock *dentry_lock_list;
420 struct work_struct dentry_lock_work;
421
422 wait_queue_head_t osb_mount_event;
423
424 /* Truncate log info */
425 struct inode *osb_tl_inode;
426 struct buffer_head *osb_tl_bh;
427 struct delayed_work osb_truncate_log_wq;
428 /*
429 * How many clusters in our truncate log.
430 * It must be protected by osb_tl_inode->i_mutex.
431 */
432 unsigned int truncated_clusters;
433
434 struct ocfs2_node_map osb_recovering_orphan_dirs;
435 unsigned int *osb_orphan_wipes;
436 wait_queue_head_t osb_wipe_event;
437
438 struct ocfs2_orphan_scan osb_orphan_scan;
439
440 /* used to protect metaecc calculation check of xattr. */
441 spinlock_t osb_xattr_lock;
442
443 unsigned int osb_dx_mask;
444 u32 osb_dx_seed[4];
445
446 /* the group we used to allocate inodes. */
447 u64 osb_inode_alloc_group;
448
449 /* rb tree root for refcount lock. */
450 struct rb_root osb_rf_lock_tree;
451 struct ocfs2_refcount_tree *osb_ref_tree_lru;
452 };
453
454 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
455
456 /* Useful typedef for passing around journal access functions */
457 typedef int (*ocfs2_journal_access_func)(handle_t *handle,
458 struct ocfs2_caching_info *ci,
459 struct buffer_head *bh, int type);
460
ocfs2_should_order_data(struct inode * inode)461 static inline int ocfs2_should_order_data(struct inode *inode)
462 {
463 if (!S_ISREG(inode->i_mode))
464 return 0;
465 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
466 return 0;
467 return 1;
468 }
469
ocfs2_sparse_alloc(struct ocfs2_super * osb)470 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
471 {
472 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
473 return 1;
474 return 0;
475 }
476
ocfs2_writes_unwritten_extents(struct ocfs2_super * osb)477 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
478 {
479 /*
480 * Support for sparse files is a pre-requisite
481 */
482 if (!ocfs2_sparse_alloc(osb))
483 return 0;
484
485 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
486 return 1;
487 return 0;
488 }
489
ocfs2_supports_inline_data(struct ocfs2_super * osb)490 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
491 {
492 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
493 return 1;
494 return 0;
495 }
496
ocfs2_supports_xattr(struct ocfs2_super * osb)497 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
498 {
499 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
500 return 1;
501 return 0;
502 }
503
ocfs2_meta_ecc(struct ocfs2_super * osb)504 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
505 {
506 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
507 return 1;
508 return 0;
509 }
510
ocfs2_supports_indexed_dirs(struct ocfs2_super * osb)511 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
512 {
513 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
514 return 1;
515 return 0;
516 }
517
ocfs2_supports_discontig_bg(struct ocfs2_super * osb)518 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
519 {
520 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
521 return 1;
522 return 0;
523 }
524
ocfs2_link_max(struct ocfs2_super * osb)525 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
526 {
527 if (ocfs2_supports_indexed_dirs(osb))
528 return OCFS2_DX_LINK_MAX;
529 return OCFS2_LINK_MAX;
530 }
531
ocfs2_read_links_count(struct ocfs2_dinode * di)532 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
533 {
534 u32 nlink = le16_to_cpu(di->i_links_count);
535 u32 hi = le16_to_cpu(di->i_links_count_hi);
536
537 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
538 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
539
540 return nlink;
541 }
542
ocfs2_set_links_count(struct ocfs2_dinode * di,u32 nlink)543 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
544 {
545 u16 lo, hi;
546
547 lo = nlink;
548 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
549
550 di->i_links_count = cpu_to_le16(lo);
551 di->i_links_count_hi = cpu_to_le16(hi);
552 }
553
ocfs2_add_links_count(struct ocfs2_dinode * di,int n)554 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
555 {
556 u32 links = ocfs2_read_links_count(di);
557
558 links += n;
559
560 ocfs2_set_links_count(di, links);
561 }
562
ocfs2_refcount_tree(struct ocfs2_super * osb)563 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
564 {
565 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
566 return 1;
567 return 0;
568 }
569
570 /* set / clear functions because cluster events can make these happen
571 * in parallel so we want the transitions to be atomic. this also
572 * means that any future flags osb_flags must be protected by spinlock
573 * too! */
ocfs2_set_osb_flag(struct ocfs2_super * osb,unsigned long flag)574 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
575 unsigned long flag)
576 {
577 spin_lock(&osb->osb_lock);
578 osb->osb_flags |= flag;
579 spin_unlock(&osb->osb_lock);
580 }
581
582
ocfs2_test_osb_flag(struct ocfs2_super * osb,unsigned long flag)583 static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb,
584 unsigned long flag)
585 {
586 unsigned long ret;
587
588 spin_lock(&osb->osb_lock);
589 ret = osb->osb_flags & flag;
590 spin_unlock(&osb->osb_lock);
591 return ret;
592 }
593
ocfs2_set_ro_flag(struct ocfs2_super * osb,int hard)594 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
595 int hard)
596 {
597 spin_lock(&osb->osb_lock);
598 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
599 if (hard)
600 osb->osb_flags |= OCFS2_OSB_HARD_RO;
601 else
602 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
603 spin_unlock(&osb->osb_lock);
604 }
605
ocfs2_is_hard_readonly(struct ocfs2_super * osb)606 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
607 {
608 int ret;
609
610 spin_lock(&osb->osb_lock);
611 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
612 spin_unlock(&osb->osb_lock);
613
614 return ret;
615 }
616
ocfs2_is_soft_readonly(struct ocfs2_super * osb)617 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
618 {
619 int ret;
620
621 spin_lock(&osb->osb_lock);
622 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
623 spin_unlock(&osb->osb_lock);
624
625 return ret;
626 }
627
ocfs2_clusterinfo_valid(struct ocfs2_super * osb)628 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
629 {
630 return (osb->s_feature_incompat &
631 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
632 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
633 }
634
ocfs2_userspace_stack(struct ocfs2_super * osb)635 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
636 {
637 if (ocfs2_clusterinfo_valid(osb) &&
638 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
639 OCFS2_STACK_LABEL_LEN))
640 return 1;
641 return 0;
642 }
643
ocfs2_o2cb_stack(struct ocfs2_super * osb)644 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
645 {
646 if (ocfs2_clusterinfo_valid(osb) &&
647 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
648 OCFS2_STACK_LABEL_LEN))
649 return 1;
650 return 0;
651 }
652
ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super * osb)653 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
654 {
655 return ocfs2_o2cb_stack(osb) &&
656 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
657 }
658
ocfs2_mount_local(struct ocfs2_super * osb)659 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
660 {
661 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
662 }
663
ocfs2_uses_extended_slot_map(struct ocfs2_super * osb)664 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
665 {
666 return (osb->s_feature_incompat &
667 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
668 }
669
670
671 #define OCFS2_IS_VALID_DINODE(ptr) \
672 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
673
674 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
675 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
676
677 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
678 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
679
680
681 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
682 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
683
684 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
685 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
686
687 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
688 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
689
690 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
691 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
692
693 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
694 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
695
ino_from_blkno(struct super_block * sb,u64 blkno)696 static inline unsigned long ino_from_blkno(struct super_block *sb,
697 u64 blkno)
698 {
699 return (unsigned long)(blkno & (u64)ULONG_MAX);
700 }
701
ocfs2_clusters_to_blocks(struct super_block * sb,u32 clusters)702 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
703 u32 clusters)
704 {
705 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
706 sb->s_blocksize_bits;
707
708 return (u64)clusters << c_to_b_bits;
709 }
710
ocfs2_blocks_to_clusters(struct super_block * sb,u64 blocks)711 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
712 u64 blocks)
713 {
714 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
715 sb->s_blocksize_bits;
716
717 return (u32)(blocks >> b_to_c_bits);
718 }
719
ocfs2_clusters_for_bytes(struct super_block * sb,u64 bytes)720 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
721 u64 bytes)
722 {
723 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
724 unsigned int clusters;
725
726 bytes += OCFS2_SB(sb)->s_clustersize - 1;
727 /* OCFS2 just cannot have enough clusters to overflow this */
728 clusters = (unsigned int)(bytes >> cl_bits);
729
730 return clusters;
731 }
732
ocfs2_blocks_for_bytes(struct super_block * sb,u64 bytes)733 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
734 u64 bytes)
735 {
736 bytes += sb->s_blocksize - 1;
737 return bytes >> sb->s_blocksize_bits;
738 }
739
ocfs2_clusters_to_bytes(struct super_block * sb,u32 clusters)740 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
741 u32 clusters)
742 {
743 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
744 }
745
ocfs2_block_to_cluster_start(struct super_block * sb,u64 blocks)746 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
747 u64 blocks)
748 {
749 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
750 unsigned int clusters;
751
752 clusters = ocfs2_blocks_to_clusters(sb, blocks);
753 return (u64)clusters << bits;
754 }
755
ocfs2_align_bytes_to_clusters(struct super_block * sb,u64 bytes)756 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
757 u64 bytes)
758 {
759 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
760 unsigned int clusters;
761
762 clusters = ocfs2_clusters_for_bytes(sb, bytes);
763 return (u64)clusters << cl_bits;
764 }
765
ocfs2_align_bytes_to_blocks(struct super_block * sb,u64 bytes)766 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
767 u64 bytes)
768 {
769 u64 blocks;
770
771 blocks = ocfs2_blocks_for_bytes(sb, bytes);
772 return blocks << sb->s_blocksize_bits;
773 }
774
ocfs2_align_bytes_to_sectors(u64 bytes)775 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
776 {
777 return (unsigned long)((bytes + 511) >> 9);
778 }
779
ocfs2_page_index_to_clusters(struct super_block * sb,unsigned long pg_index)780 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
781 unsigned long pg_index)
782 {
783 u32 clusters = pg_index;
784 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
785
786 if (unlikely(PAGE_CACHE_SHIFT > cbits))
787 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
788 else if (PAGE_CACHE_SHIFT < cbits)
789 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
790
791 return clusters;
792 }
793
794 /*
795 * Find the 1st page index which covers the given clusters.
796 */
ocfs2_align_clusters_to_page_index(struct super_block * sb,u32 clusters)797 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
798 u32 clusters)
799 {
800 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
801 pgoff_t index = clusters;
802
803 if (PAGE_CACHE_SHIFT > cbits) {
804 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
805 } else if (PAGE_CACHE_SHIFT < cbits) {
806 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
807 }
808
809 return index;
810 }
811
ocfs2_pages_per_cluster(struct super_block * sb)812 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
813 {
814 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
815 unsigned int pages_per_cluster = 1;
816
817 if (PAGE_CACHE_SHIFT < cbits)
818 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
819
820 return pages_per_cluster;
821 }
822
ocfs2_megabytes_to_clusters(struct super_block * sb,unsigned int megs)823 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
824 unsigned int megs)
825 {
826 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
827
828 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
829 }
830
ocfs2_clusters_to_megabytes(struct super_block * sb,unsigned int clusters)831 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
832 unsigned int clusters)
833 {
834 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
835 }
836
_ocfs2_set_bit(unsigned int bit,unsigned long * bitmap)837 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
838 {
839 __set_bit_le(bit, bitmap);
840 }
841 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
842
_ocfs2_clear_bit(unsigned int bit,unsigned long * bitmap)843 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
844 {
845 __clear_bit_le(bit, bitmap);
846 }
847 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
848
849 #define ocfs2_test_bit test_bit_le
850 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
851 #define ocfs2_find_next_bit find_next_bit_le
852
correct_addr_and_bit_unaligned(int * bit,void * addr)853 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
854 {
855 #if BITS_PER_LONG == 64
856 *bit += ((unsigned long) addr & 7UL) << 3;
857 addr = (void *) ((unsigned long) addr & ~7UL);
858 #elif BITS_PER_LONG == 32
859 *bit += ((unsigned long) addr & 3UL) << 3;
860 addr = (void *) ((unsigned long) addr & ~3UL);
861 #else
862 #error "how many bits you are?!"
863 #endif
864 return addr;
865 }
866
ocfs2_set_bit_unaligned(int bit,void * bitmap)867 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
868 {
869 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
870 ocfs2_set_bit(bit, bitmap);
871 }
872
ocfs2_clear_bit_unaligned(int bit,void * bitmap)873 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
874 {
875 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
876 ocfs2_clear_bit(bit, bitmap);
877 }
878
ocfs2_test_bit_unaligned(int bit,void * bitmap)879 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
880 {
881 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
882 return ocfs2_test_bit(bit, bitmap);
883 }
884
ocfs2_find_next_zero_bit_unaligned(void * bitmap,int max,int start)885 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
886 int start)
887 {
888 int fix = 0, ret, tmpmax;
889 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
890 tmpmax = max + fix;
891 start += fix;
892
893 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
894 if (ret > max)
895 return max;
896 return ret;
897 }
898
899 #endif /* OCFS2_H */
900
901