1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * ocfs2.h
4 *
5 * Defines macros and structures used in OCFS2
6 *
7 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
8 */
9
10 #ifndef OCFS2_H
11 #define OCFS2_H
12
13 #include <linux/spinlock.h>
14 #include <linux/sched.h>
15 #include <linux/wait.h>
16 #include <linux/list.h>
17 #include <linux/llist.h>
18 #include <linux/rbtree.h>
19 #include <linux/workqueue.h>
20 #include <linux/kref.h>
21 #include <linux/mutex.h>
22 #include <linux/lockdep.h>
23 #include <linux/jbd2.h>
24
25 /* For union ocfs2_dlm_lksb */
26 #include "stackglue.h"
27
28 #include "ocfs2_fs.h"
29 #include "ocfs2_lockid.h"
30 #include "ocfs2_ioctl.h"
31
32 /* For struct ocfs2_blockcheck_stats */
33 #include "blockcheck.h"
34
35 #include "reservations.h"
36
37 #include "filecheck.h"
38
39 /* Caching of metadata buffers */
40
41 /* Most user visible OCFS2 inodes will have very few pieces of
42 * metadata, but larger files (including bitmaps, etc) must be taken
43 * into account when designing an access scheme. We allow a small
44 * amount of inlined blocks to be stored on an array and grow the
45 * structure into a rb tree when necessary. */
46 #define OCFS2_CACHE_INFO_MAX_ARRAY 2
47
48 /* Flags for ocfs2_caching_info */
49
50 enum ocfs2_caching_info_flags {
51 /* Indicates that the metadata cache is using the inline array */
52 OCFS2_CACHE_FL_INLINE = 1<<1,
53 };
54
55 struct ocfs2_caching_operations;
56 struct ocfs2_caching_info {
57 /*
58 * The parent structure provides the locks, but because the
59 * parent structure can differ, it provides locking operations
60 * to struct ocfs2_caching_info.
61 */
62 const struct ocfs2_caching_operations *ci_ops;
63
64 /* next two are protected by trans_inc_lock */
65 /* which transaction were we created on? Zero if none. */
66 unsigned long ci_created_trans;
67 /* last transaction we were a part of. */
68 unsigned long ci_last_trans;
69
70 /* Cache structures */
71 unsigned int ci_flags;
72 unsigned int ci_num_cached;
73 union {
74 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
75 struct rb_root ci_tree;
76 } ci_cache;
77 };
78 /*
79 * Need this prototype here instead of in uptodate.h because journal.h
80 * uses it.
81 */
82 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
83
84 /* this limits us to 256 nodes
85 * if we need more, we can do a kmalloc for the map */
86 #define OCFS2_NODE_MAP_MAX_NODES 256
87 struct ocfs2_node_map {
88 u16 num_nodes;
89 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
90 };
91
92 enum ocfs2_ast_action {
93 OCFS2_AST_INVALID = 0,
94 OCFS2_AST_ATTACH,
95 OCFS2_AST_CONVERT,
96 OCFS2_AST_DOWNCONVERT,
97 };
98
99 /* actions for an unlockast function to take. */
100 enum ocfs2_unlock_action {
101 OCFS2_UNLOCK_INVALID = 0,
102 OCFS2_UNLOCK_CANCEL_CONVERT,
103 OCFS2_UNLOCK_DROP_LOCK,
104 };
105
106 /* ocfs2_lock_res->l_flags flags. */
107 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
108 * the lvb */
109 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
110 * dlm_lock */
111 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
112 * downconvert*/
113 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
114 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
115 #define OCFS2_LOCK_REFRESHING (0x00000020)
116 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
117 * for shutdown paths */
118 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
119 * when to skip queueing
120 * a lock because it's
121 * about to be
122 * dropped. */
123 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
124 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
125 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
126 call to dlm_lock. Only
127 exists with BUSY set. */
128 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
129 * from downconverting
130 * before the upconvert
131 * has completed */
132
133 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
134 * lock has already
135 * returned, do not block
136 * dc thread from
137 * downconverting */
138
139 struct ocfs2_lock_res_ops;
140
141 typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
142
143 #ifdef CONFIG_OCFS2_FS_STATS
144 struct ocfs2_lock_stats {
145 u64 ls_total; /* Total wait in NSEC */
146 u32 ls_gets; /* Num acquires */
147 u32 ls_fail; /* Num failed acquires */
148
149 /* Storing max wait in usecs saves 24 bytes per inode */
150 u32 ls_max; /* Max wait in USEC */
151 u64 ls_last; /* Last unlock time in USEC */
152 };
153 #endif
154
155 struct ocfs2_lock_res {
156 void *l_priv;
157 struct ocfs2_lock_res_ops *l_ops;
158
159
160 struct list_head l_blocked_list;
161 struct list_head l_mask_waiters;
162 struct list_head l_holders;
163
164 unsigned long l_flags;
165 char l_name[OCFS2_LOCK_ID_MAX_LEN];
166 unsigned int l_ro_holders;
167 unsigned int l_ex_holders;
168 signed char l_level;
169 signed char l_requested;
170 signed char l_blocking;
171
172 /* Data packed - type enum ocfs2_lock_type */
173 unsigned char l_type;
174
175 /* used from AST/BAST funcs. */
176 /* Data packed - enum type ocfs2_ast_action */
177 unsigned char l_action;
178 /* Data packed - enum type ocfs2_unlock_action */
179 unsigned char l_unlock_action;
180 unsigned int l_pending_gen;
181
182 spinlock_t l_lock;
183
184 struct ocfs2_dlm_lksb l_lksb;
185
186 wait_queue_head_t l_event;
187
188 struct list_head l_debug_list;
189
190 #ifdef CONFIG_OCFS2_FS_STATS
191 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
192 u32 l_lock_refresh; /* Disk refreshes */
193 u64 l_lock_wait; /* First lock wait time */
194 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
195 #endif
196 #ifdef CONFIG_DEBUG_LOCK_ALLOC
197 struct lockdep_map l_lockdep_map;
198 #endif
199 };
200
201 enum ocfs2_orphan_reco_type {
202 ORPHAN_NO_NEED_TRUNCATE = 0,
203 ORPHAN_NEED_TRUNCATE,
204 };
205
206 enum ocfs2_orphan_scan_state {
207 ORPHAN_SCAN_ACTIVE,
208 ORPHAN_SCAN_INACTIVE
209 };
210
211 struct ocfs2_orphan_scan {
212 struct mutex os_lock;
213 struct ocfs2_super *os_osb;
214 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
215 struct delayed_work os_orphan_scan_work;
216 time64_t os_scantime; /* time this node ran the scan */
217 u32 os_count; /* tracks node specific scans */
218 u32 os_seqno; /* tracks cluster wide scans */
219 atomic_t os_state; /* ACTIVE or INACTIVE */
220 };
221
222 struct ocfs2_dlm_debug {
223 struct kref d_refcnt;
224 u32 d_filter_secs;
225 struct list_head d_lockres_tracking;
226 };
227
228 enum ocfs2_vol_state
229 {
230 VOLUME_INIT = 0,
231 VOLUME_MOUNTED,
232 VOLUME_MOUNTED_QUOTAS,
233 VOLUME_DISMOUNTED,
234 VOLUME_DISABLED
235 };
236
237 struct ocfs2_alloc_stats
238 {
239 atomic_t moves;
240 atomic_t local_data;
241 atomic_t bitmap_data;
242 atomic_t bg_allocs;
243 atomic_t bg_extends;
244 };
245
246 enum ocfs2_local_alloc_state
247 {
248 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
249 * this mountpoint. */
250 OCFS2_LA_ENABLED, /* Local alloc is in use. */
251 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
252 * of bits has been reduced. */
253 OCFS2_LA_DISABLED /* Local alloc has temporarily been
254 * disabled. */
255 };
256
257 enum ocfs2_mount_options
258 {
259 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
260 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
261 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
262 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
263 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
264 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
265 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
266 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
267 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
268 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
269 control lists */
270 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
271 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
272 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
273 writes */
274 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
275 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
276
277 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
278 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */
279 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */
280 };
281
282 #define OCFS2_OSB_SOFT_RO 0x0001
283 #define OCFS2_OSB_HARD_RO 0x0002
284 #define OCFS2_OSB_ERROR_FS 0x0004
285 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
286
287 struct ocfs2_triggers {
288 struct jbd2_buffer_trigger_type ot_triggers;
289 int ot_offset;
290 struct super_block *sb;
291 };
292
293 enum ocfs2_journal_trigger_type {
294 OCFS2_JTR_DI,
295 OCFS2_JTR_EB,
296 OCFS2_JTR_RB,
297 OCFS2_JTR_GD,
298 OCFS2_JTR_DB,
299 OCFS2_JTR_XB,
300 OCFS2_JTR_DQ,
301 OCFS2_JTR_DR,
302 OCFS2_JTR_DL,
303 OCFS2_JTR_NONE /* This must be the last entry */
304 };
305
306 #define OCFS2_JOURNAL_TRIGGER_COUNT OCFS2_JTR_NONE
307
308 void ocfs2_initialize_journal_triggers(struct super_block *sb,
309 struct ocfs2_triggers triggers[]);
310
311 enum ocfs2_recovery_state {
312 OCFS2_REC_ENABLED = 0,
313 OCFS2_REC_QUOTA_WANT_DISABLE,
314 /*
315 * Must be OCFS2_REC_QUOTA_WANT_DISABLE + 1 for
316 * ocfs2_recovery_disable_quota() to work.
317 */
318 OCFS2_REC_QUOTA_DISABLED,
319 OCFS2_REC_WANT_DISABLE,
320 /*
321 * Must be OCFS2_REC_WANT_DISABLE + 1 for ocfs2_recovery_exit() to work
322 */
323 OCFS2_REC_DISABLED,
324 };
325
326 struct ocfs2_journal;
327 struct ocfs2_slot_info;
328 struct ocfs2_recovery_map;
329 struct ocfs2_replay_map;
330 struct ocfs2_quota_recovery;
331 struct ocfs2_super
332 {
333 struct task_struct *commit_task;
334 struct super_block *sb;
335 struct inode *root_inode;
336 struct inode *sys_root_inode;
337 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
338 struct inode **local_system_inodes;
339
340 struct ocfs2_slot_info *slot_info;
341
342 u32 *slot_recovery_generations;
343
344 spinlock_t node_map_lock;
345
346 u64 root_blkno;
347 u64 system_dir_blkno;
348 u64 bitmap_blkno;
349 u32 bitmap_cpg;
350 char *uuid_str;
351 u32 uuid_hash;
352 u8 *vol_label;
353 u64 first_cluster_group_blkno;
354 u32 fs_generation;
355
356 u32 s_feature_compat;
357 u32 s_feature_incompat;
358 u32 s_feature_ro_compat;
359
360 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
361 * Could protect more on osb as it's very short lived.
362 */
363 spinlock_t osb_lock;
364 u32 s_next_generation;
365 unsigned long osb_flags;
366 u16 s_inode_steal_slot;
367 u16 s_meta_steal_slot;
368 atomic_t s_num_inodes_stolen;
369 atomic_t s_num_meta_stolen;
370
371 unsigned long s_mount_opt;
372 unsigned int s_atime_quantum;
373
374 unsigned int max_slots;
375 unsigned int node_num;
376 int slot_num;
377 int preferred_slot;
378 int s_sectsize_bits;
379 int s_clustersize;
380 int s_clustersize_bits;
381 unsigned int s_xattr_inline_size;
382
383 atomic_t vol_state;
384 struct mutex recovery_lock;
385 struct ocfs2_recovery_map *recovery_map;
386 struct ocfs2_replay_map *replay_map;
387 struct task_struct *recovery_thread_task;
388 enum ocfs2_recovery_state recovery_state;
389 wait_queue_head_t checkpoint_event;
390 struct ocfs2_journal *journal;
391 unsigned long osb_commit_interval;
392
393 /* Journal triggers for checksum */
394 struct ocfs2_triggers s_journal_triggers[OCFS2_JOURNAL_TRIGGER_COUNT];
395
396 struct delayed_work la_enable_wq;
397
398 /*
399 * Must hold local alloc i_rwsem and osb->osb_lock to change
400 * local_alloc_bits. Reads can be done under either lock.
401 */
402 unsigned int local_alloc_bits;
403 unsigned int local_alloc_default_bits;
404 /* osb_clusters_at_boot can become stale! Do not trust it to
405 * be up to date. */
406 unsigned int osb_clusters_at_boot;
407
408 enum ocfs2_local_alloc_state local_alloc_state; /* protected
409 * by osb_lock */
410
411 struct buffer_head *local_alloc_bh;
412
413 u64 la_last_gd;
414
415 struct ocfs2_reservation_map osb_la_resmap;
416
417 unsigned int osb_resv_level;
418 unsigned int osb_dir_resv_level;
419
420 /* Next two fields are for local node slot recovery during
421 * mount. */
422 struct ocfs2_dinode *local_alloc_copy;
423 struct ocfs2_quota_recovery *quota_rec;
424
425 struct ocfs2_blockcheck_stats osb_ecc_stats;
426 struct ocfs2_alloc_stats alloc_stats;
427 char dev_str[20]; /* "major,minor" of the device */
428
429 u8 osb_stackflags;
430
431 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
432 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
433 struct ocfs2_cluster_connection *cconn;
434 struct ocfs2_lock_res osb_super_lockres;
435 struct ocfs2_lock_res osb_rename_lockres;
436 struct ocfs2_lock_res osb_nfs_sync_lockres;
437 struct rw_semaphore nfs_sync_rwlock;
438 struct ocfs2_lock_res osb_trim_fs_lockres;
439 struct mutex obs_trim_fs_mutex;
440 struct ocfs2_dlm_debug *osb_dlm_debug;
441
442 struct dentry *osb_debug_root;
443
444 wait_queue_head_t recovery_event;
445
446 spinlock_t dc_task_lock;
447 struct task_struct *dc_task;
448 wait_queue_head_t dc_event;
449 unsigned long dc_wake_sequence;
450 unsigned long dc_work_sequence;
451
452 /*
453 * Any thread can add locks to the list, but the downconvert
454 * thread is the only one allowed to remove locks. Any change
455 * to this rule requires updating
456 * ocfs2_downconvert_thread_do_work().
457 */
458 struct list_head blocked_lock_list;
459 unsigned long blocked_lock_count;
460
461 /* List of dquot structures to drop last reference to */
462 struct llist_head dquot_drop_list;
463 struct work_struct dquot_drop_work;
464
465 wait_queue_head_t osb_mount_event;
466
467 /* Truncate log info */
468 struct inode *osb_tl_inode;
469 struct buffer_head *osb_tl_bh;
470 struct delayed_work osb_truncate_log_wq;
471 atomic_t osb_tl_disable;
472 /*
473 * How many clusters in our truncate log.
474 * It must be protected by osb_tl_inode->i_rwsem.
475 */
476 unsigned int truncated_clusters;
477
478 struct ocfs2_node_map osb_recovering_orphan_dirs;
479 unsigned int *osb_orphan_wipes;
480 wait_queue_head_t osb_wipe_event;
481
482 struct ocfs2_orphan_scan osb_orphan_scan;
483
484 /* used to protect metaecc calculation check of xattr. */
485 spinlock_t osb_xattr_lock;
486
487 unsigned int osb_dx_mask;
488 u32 osb_dx_seed[4];
489
490 /* the group we used to allocate inodes. */
491 u64 osb_inode_alloc_group;
492
493 /* rb tree root for refcount lock. */
494 struct rb_root osb_rf_lock_tree;
495 struct ocfs2_refcount_tree *osb_ref_tree_lru;
496
497 struct mutex system_file_mutex;
498
499 /*
500 * OCFS2 needs to schedule several different types of work which
501 * require cluster locking, disk I/O, recovery waits, etc. Since these
502 * types of work tend to be heavy we avoid using the kernel events
503 * workqueue and schedule on our own.
504 */
505 struct workqueue_struct *ocfs2_wq;
506
507 /* sysfs directory per partition */
508 struct kset *osb_dev_kset;
509
510 /* file check related stuff */
511 struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
512 };
513
514 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
515
516 /* Useful typedef for passing around journal access functions */
517 typedef int (*ocfs2_journal_access_func)(handle_t *handle,
518 struct ocfs2_caching_info *ci,
519 struct buffer_head *bh, int type);
520
ocfs2_should_order_data(struct inode * inode)521 static inline int ocfs2_should_order_data(struct inode *inode)
522 {
523 if (!S_ISREG(inode->i_mode))
524 return 0;
525 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
526 return 0;
527 return 1;
528 }
529
ocfs2_sparse_alloc(struct ocfs2_super * osb)530 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
531 {
532 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
533 return 1;
534 return 0;
535 }
536
ocfs2_writes_unwritten_extents(struct ocfs2_super * osb)537 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
538 {
539 /*
540 * Support for sparse files is a pre-requisite
541 */
542 if (!ocfs2_sparse_alloc(osb))
543 return 0;
544
545 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
546 return 1;
547 return 0;
548 }
549
ocfs2_supports_append_dio(struct ocfs2_super * osb)550 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
551 {
552 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
553 return 1;
554 return 0;
555 }
556
557
ocfs2_supports_inline_data(struct ocfs2_super * osb)558 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
559 {
560 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
561 return 1;
562 return 0;
563 }
564
ocfs2_supports_xattr(struct ocfs2_super * osb)565 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
566 {
567 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
568 return 1;
569 return 0;
570 }
571
ocfs2_meta_ecc(struct ocfs2_super * osb)572 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
573 {
574 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
575 return 1;
576 return 0;
577 }
578
ocfs2_supports_indexed_dirs(struct ocfs2_super * osb)579 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
580 {
581 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
582 return 1;
583 return 0;
584 }
585
ocfs2_supports_discontig_bg(struct ocfs2_super * osb)586 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
587 {
588 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
589 return 1;
590 return 0;
591 }
592
ocfs2_link_max(struct ocfs2_super * osb)593 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
594 {
595 if (ocfs2_supports_indexed_dirs(osb))
596 return OCFS2_DX_LINK_MAX;
597 return OCFS2_LINK_MAX;
598 }
599
ocfs2_read_links_count(struct ocfs2_dinode * di)600 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
601 {
602 u32 nlink = le16_to_cpu(di->i_links_count);
603 u32 hi = le16_to_cpu(di->i_links_count_hi);
604
605 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
606
607 return nlink;
608 }
609
ocfs2_set_links_count(struct ocfs2_dinode * di,u32 nlink)610 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
611 {
612 u16 lo, hi;
613
614 lo = nlink;
615 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
616
617 di->i_links_count = cpu_to_le16(lo);
618 di->i_links_count_hi = cpu_to_le16(hi);
619 }
620
ocfs2_add_links_count(struct ocfs2_dinode * di,int n)621 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
622 {
623 u32 links = ocfs2_read_links_count(di);
624
625 links += n;
626
627 ocfs2_set_links_count(di, links);
628 }
629
ocfs2_refcount_tree(struct ocfs2_super * osb)630 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
631 {
632 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
633 return 1;
634 return 0;
635 }
636
637 /* set / clear functions because cluster events can make these happen
638 * in parallel so we want the transitions to be atomic. this also
639 * means that any future flags osb_flags must be protected by spinlock
640 * too! */
ocfs2_set_osb_flag(struct ocfs2_super * osb,unsigned long flag)641 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
642 unsigned long flag)
643 {
644 spin_lock(&osb->osb_lock);
645 osb->osb_flags |= flag;
646 spin_unlock(&osb->osb_lock);
647 }
648
ocfs2_set_ro_flag(struct ocfs2_super * osb,int hard)649 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
650 int hard)
651 {
652 spin_lock(&osb->osb_lock);
653 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
654 if (hard)
655 osb->osb_flags |= OCFS2_OSB_HARD_RO;
656 else
657 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
658 spin_unlock(&osb->osb_lock);
659 }
660
ocfs2_is_hard_readonly(struct ocfs2_super * osb)661 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
662 {
663 int ret;
664
665 spin_lock(&osb->osb_lock);
666 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
667 spin_unlock(&osb->osb_lock);
668
669 return ret;
670 }
671
ocfs2_is_soft_readonly(struct ocfs2_super * osb)672 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
673 {
674 int ret;
675
676 spin_lock(&osb->osb_lock);
677 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
678 spin_unlock(&osb->osb_lock);
679
680 return ret;
681 }
682
ocfs2_clusterinfo_valid(struct ocfs2_super * osb)683 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
684 {
685 return (osb->s_feature_incompat &
686 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
687 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
688 }
689
ocfs2_userspace_stack(struct ocfs2_super * osb)690 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
691 {
692 if (ocfs2_clusterinfo_valid(osb) &&
693 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
694 OCFS2_STACK_LABEL_LEN))
695 return 1;
696 return 0;
697 }
698
ocfs2_o2cb_stack(struct ocfs2_super * osb)699 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
700 {
701 if (ocfs2_clusterinfo_valid(osb) &&
702 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
703 OCFS2_STACK_LABEL_LEN))
704 return 1;
705 return 0;
706 }
707
ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super * osb)708 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
709 {
710 return ocfs2_o2cb_stack(osb) &&
711 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
712 }
713
ocfs2_mount_local(struct ocfs2_super * osb)714 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
715 {
716 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
717 }
718
ocfs2_uses_extended_slot_map(struct ocfs2_super * osb)719 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
720 {
721 return (osb->s_feature_incompat &
722 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
723 }
724
725
726 #define OCFS2_IS_VALID_DINODE(ptr) \
727 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
728
729 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
730 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
731
732 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
733 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
734
735
736 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
737 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
738
739 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
740 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
741
742 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
743 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
744
745 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
746 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
747
748 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
749 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
750
ino_from_blkno(struct super_block * sb,u64 blkno)751 static inline unsigned long ino_from_blkno(struct super_block *sb,
752 u64 blkno)
753 {
754 return (unsigned long)(blkno & (u64)ULONG_MAX);
755 }
756
ocfs2_clusters_to_blocks(struct super_block * sb,u32 clusters)757 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
758 u32 clusters)
759 {
760 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
761 sb->s_blocksize_bits;
762
763 return (u64)clusters << c_to_b_bits;
764 }
765
ocfs2_clusters_for_blocks(struct super_block * sb,u64 blocks)766 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
767 u64 blocks)
768 {
769 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
770 sb->s_blocksize_bits;
771
772 blocks += (1 << b_to_c_bits) - 1;
773 return (u32)(blocks >> b_to_c_bits);
774 }
775
ocfs2_blocks_to_clusters(struct super_block * sb,u64 blocks)776 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
777 u64 blocks)
778 {
779 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
780 sb->s_blocksize_bits;
781
782 return (u32)(blocks >> b_to_c_bits);
783 }
784
ocfs2_clusters_for_bytes(struct super_block * sb,u64 bytes)785 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
786 u64 bytes)
787 {
788 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
789 unsigned int clusters;
790
791 bytes += OCFS2_SB(sb)->s_clustersize - 1;
792 /* OCFS2 just cannot have enough clusters to overflow this */
793 clusters = (unsigned int)(bytes >> cl_bits);
794
795 return clusters;
796 }
797
ocfs2_bytes_to_clusters(struct super_block * sb,u64 bytes)798 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
799 u64 bytes)
800 {
801 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
802 unsigned int clusters;
803
804 clusters = (unsigned int)(bytes >> cl_bits);
805 return clusters;
806 }
807
ocfs2_blocks_for_bytes(struct super_block * sb,u64 bytes)808 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
809 u64 bytes)
810 {
811 bytes += sb->s_blocksize - 1;
812 return bytes >> sb->s_blocksize_bits;
813 }
814
ocfs2_clusters_to_bytes(struct super_block * sb,u32 clusters)815 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
816 u32 clusters)
817 {
818 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
819 }
820
ocfs2_block_to_cluster_start(struct super_block * sb,u64 blocks)821 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
822 u64 blocks)
823 {
824 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
825 unsigned int clusters;
826
827 clusters = ocfs2_blocks_to_clusters(sb, blocks);
828 return (u64)clusters << bits;
829 }
830
ocfs2_align_bytes_to_clusters(struct super_block * sb,u64 bytes)831 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
832 u64 bytes)
833 {
834 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
835 unsigned int clusters;
836
837 clusters = ocfs2_clusters_for_bytes(sb, bytes);
838 return (u64)clusters << cl_bits;
839 }
840
ocfs2_align_bytes_to_blocks(struct super_block * sb,u64 bytes)841 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
842 u64 bytes)
843 {
844 u64 blocks;
845
846 blocks = ocfs2_blocks_for_bytes(sb, bytes);
847 return blocks << sb->s_blocksize_bits;
848 }
849
ocfs2_align_bytes_to_sectors(u64 bytes)850 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
851 {
852 return (unsigned long)((bytes + 511) >> 9);
853 }
854
ocfs2_page_index_to_clusters(struct super_block * sb,unsigned long pg_index)855 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
856 unsigned long pg_index)
857 {
858 u32 clusters = pg_index;
859 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
860
861 if (unlikely(PAGE_SHIFT > cbits))
862 clusters = pg_index << (PAGE_SHIFT - cbits);
863 else if (PAGE_SHIFT < cbits)
864 clusters = pg_index >> (cbits - PAGE_SHIFT);
865
866 return clusters;
867 }
868
869 /*
870 * Find the 1st page index which covers the given clusters.
871 */
ocfs2_align_clusters_to_page_index(struct super_block * sb,u32 clusters)872 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
873 u32 clusters)
874 {
875 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
876 pgoff_t index = clusters;
877
878 if (PAGE_SHIFT > cbits) {
879 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
880 } else if (PAGE_SHIFT < cbits) {
881 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
882 }
883
884 return index;
885 }
886
ocfs2_pages_per_cluster(struct super_block * sb)887 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
888 {
889 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
890 unsigned int pages_per_cluster = 1;
891
892 if (PAGE_SHIFT < cbits)
893 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
894
895 return pages_per_cluster;
896 }
897
ocfs2_megabytes_to_clusters(struct super_block * sb,unsigned int megs)898 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
899 unsigned int megs)
900 {
901 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
902
903 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
904 }
905
ocfs2_clusters_to_megabytes(struct super_block * sb,unsigned int clusters)906 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
907 unsigned int clusters)
908 {
909 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
910 }
911
_ocfs2_set_bit(unsigned int bit,unsigned long * bitmap)912 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
913 {
914 __set_bit_le(bit, bitmap);
915 }
916 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
917
_ocfs2_clear_bit(unsigned int bit,unsigned long * bitmap)918 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
919 {
920 __clear_bit_le(bit, bitmap);
921 }
922 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
923
924 #define ocfs2_test_bit test_bit_le
925 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
926 #define ocfs2_find_next_bit find_next_bit_le
927
correct_addr_and_bit_unaligned(int * bit,void * addr)928 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
929 {
930 #if BITS_PER_LONG == 64
931 *bit += ((unsigned long) addr & 7UL) << 3;
932 addr = (void *) ((unsigned long) addr & ~7UL);
933 #elif BITS_PER_LONG == 32
934 *bit += ((unsigned long) addr & 3UL) << 3;
935 addr = (void *) ((unsigned long) addr & ~3UL);
936 #else
937 #error "how many bits you are?!"
938 #endif
939 return addr;
940 }
941
ocfs2_set_bit_unaligned(int bit,void * bitmap)942 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
943 {
944 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
945 ocfs2_set_bit(bit, bitmap);
946 }
947
ocfs2_clear_bit_unaligned(int bit,void * bitmap)948 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
949 {
950 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
951 ocfs2_clear_bit(bit, bitmap);
952 }
953
ocfs2_test_bit_unaligned(int bit,void * bitmap)954 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
955 {
956 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
957 return ocfs2_test_bit(bit, bitmap);
958 }
959
ocfs2_find_next_zero_bit_unaligned(void * bitmap,int max,int start)960 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
961 int start)
962 {
963 int fix = 0, ret, tmpmax;
964 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
965 tmpmax = max + fix;
966 start += fix;
967
968 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
969 if (ret > max)
970 return max;
971 return ret;
972 }
973
974 #endif /* OCFS2_H */
975
976