1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * ocfs2.h
6 *
7 * Defines macros and structures used in OCFS2
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 */
11
12 #ifndef OCFS2_H
13 #define OCFS2_H
14
15 #include <linux/spinlock.h>
16 #include <linux/sched.h>
17 #include <linux/wait.h>
18 #include <linux/list.h>
19 #include <linux/llist.h>
20 #include <linux/rbtree.h>
21 #include <linux/workqueue.h>
22 #include <linux/kref.h>
23 #include <linux/mutex.h>
24 #include <linux/lockdep.h>
25 #include <linux/jbd2.h>
26
27 /* For union ocfs2_dlm_lksb */
28 #include "stackglue.h"
29
30 #include "ocfs2_fs.h"
31 #include "ocfs2_lockid.h"
32 #include "ocfs2_ioctl.h"
33
34 /* For struct ocfs2_blockcheck_stats */
35 #include "blockcheck.h"
36
37 #include "reservations.h"
38
39 #include "filecheck.h"
40
41 /* Caching of metadata buffers */
42
43 /* Most user visible OCFS2 inodes will have very few pieces of
44 * metadata, but larger files (including bitmaps, etc) must be taken
45 * into account when designing an access scheme. We allow a small
46 * amount of inlined blocks to be stored on an array and grow the
47 * structure into a rb tree when necessary. */
48 #define OCFS2_CACHE_INFO_MAX_ARRAY 2
49
50 /* Flags for ocfs2_caching_info */
51
52 enum ocfs2_caching_info_flags {
53 /* Indicates that the metadata cache is using the inline array */
54 OCFS2_CACHE_FL_INLINE = 1<<1,
55 };
56
57 struct ocfs2_caching_operations;
58 struct ocfs2_caching_info {
59 /*
60 * The parent structure provides the locks, but because the
61 * parent structure can differ, it provides locking operations
62 * to struct ocfs2_caching_info.
63 */
64 const struct ocfs2_caching_operations *ci_ops;
65
66 /* next two are protected by trans_inc_lock */
67 /* which transaction were we created on? Zero if none. */
68 unsigned long ci_created_trans;
69 /* last transaction we were a part of. */
70 unsigned long ci_last_trans;
71
72 /* Cache structures */
73 unsigned int ci_flags;
74 unsigned int ci_num_cached;
75 union {
76 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
77 struct rb_root ci_tree;
78 } ci_cache;
79 };
80 /*
81 * Need this prototype here instead of in uptodate.h because journal.h
82 * uses it.
83 */
84 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
85
86 /* this limits us to 256 nodes
87 * if we need more, we can do a kmalloc for the map */
88 #define OCFS2_NODE_MAP_MAX_NODES 256
89 struct ocfs2_node_map {
90 u16 num_nodes;
91 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
92 };
93
94 enum ocfs2_ast_action {
95 OCFS2_AST_INVALID = 0,
96 OCFS2_AST_ATTACH,
97 OCFS2_AST_CONVERT,
98 OCFS2_AST_DOWNCONVERT,
99 };
100
101 /* actions for an unlockast function to take. */
102 enum ocfs2_unlock_action {
103 OCFS2_UNLOCK_INVALID = 0,
104 OCFS2_UNLOCK_CANCEL_CONVERT,
105 OCFS2_UNLOCK_DROP_LOCK,
106 };
107
108 /* ocfs2_lock_res->l_flags flags. */
109 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
110 * the lvb */
111 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
112 * dlm_lock */
113 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
114 * downconvert*/
115 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
116 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
117 #define OCFS2_LOCK_REFRESHING (0x00000020)
118 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
119 * for shutdown paths */
120 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
121 * when to skip queueing
122 * a lock because it's
123 * about to be
124 * dropped. */
125 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
126 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
127 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
128 call to dlm_lock. Only
129 exists with BUSY set. */
130 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
131 * from downconverting
132 * before the upconvert
133 * has completed */
134
135 #define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
136 * lock has already
137 * returned, do not block
138 * dc thread from
139 * downconverting */
140
141 struct ocfs2_lock_res_ops;
142
143 typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
144
145 #ifdef CONFIG_OCFS2_FS_STATS
146 struct ocfs2_lock_stats {
147 u64 ls_total; /* Total wait in NSEC */
148 u32 ls_gets; /* Num acquires */
149 u32 ls_fail; /* Num failed acquires */
150
151 /* Storing max wait in usecs saves 24 bytes per inode */
152 u32 ls_max; /* Max wait in USEC */
153 u64 ls_last; /* Last unlock time in USEC */
154 };
155 #endif
156
157 struct ocfs2_lock_res {
158 void *l_priv;
159 struct ocfs2_lock_res_ops *l_ops;
160
161
162 struct list_head l_blocked_list;
163 struct list_head l_mask_waiters;
164 struct list_head l_holders;
165
166 unsigned long l_flags;
167 char l_name[OCFS2_LOCK_ID_MAX_LEN];
168 unsigned int l_ro_holders;
169 unsigned int l_ex_holders;
170 signed char l_level;
171 signed char l_requested;
172 signed char l_blocking;
173
174 /* Data packed - type enum ocfs2_lock_type */
175 unsigned char l_type;
176
177 /* used from AST/BAST funcs. */
178 /* Data packed - enum type ocfs2_ast_action */
179 unsigned char l_action;
180 /* Data packed - enum type ocfs2_unlock_action */
181 unsigned char l_unlock_action;
182 unsigned int l_pending_gen;
183
184 spinlock_t l_lock;
185
186 struct ocfs2_dlm_lksb l_lksb;
187
188 wait_queue_head_t l_event;
189
190 struct list_head l_debug_list;
191
192 #ifdef CONFIG_OCFS2_FS_STATS
193 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
194 u32 l_lock_refresh; /* Disk refreshes */
195 u64 l_lock_wait; /* First lock wait time */
196 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
197 #endif
198 #ifdef CONFIG_DEBUG_LOCK_ALLOC
199 struct lockdep_map l_lockdep_map;
200 #endif
201 };
202
203 enum ocfs2_orphan_reco_type {
204 ORPHAN_NO_NEED_TRUNCATE = 0,
205 ORPHAN_NEED_TRUNCATE,
206 };
207
208 enum ocfs2_orphan_scan_state {
209 ORPHAN_SCAN_ACTIVE,
210 ORPHAN_SCAN_INACTIVE
211 };
212
213 struct ocfs2_orphan_scan {
214 struct mutex os_lock;
215 struct ocfs2_super *os_osb;
216 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
217 struct delayed_work os_orphan_scan_work;
218 time64_t os_scantime; /* time this node ran the scan */
219 u32 os_count; /* tracks node specific scans */
220 u32 os_seqno; /* tracks cluster wide scans */
221 atomic_t os_state; /* ACTIVE or INACTIVE */
222 };
223
224 struct ocfs2_dlm_debug {
225 struct kref d_refcnt;
226 u32 d_filter_secs;
227 struct list_head d_lockres_tracking;
228 };
229
230 enum ocfs2_vol_state
231 {
232 VOLUME_INIT = 0,
233 VOLUME_MOUNTED,
234 VOLUME_MOUNTED_QUOTAS,
235 VOLUME_DISMOUNTED,
236 VOLUME_DISABLED
237 };
238
239 struct ocfs2_alloc_stats
240 {
241 atomic_t moves;
242 atomic_t local_data;
243 atomic_t bitmap_data;
244 atomic_t bg_allocs;
245 atomic_t bg_extends;
246 };
247
248 enum ocfs2_local_alloc_state
249 {
250 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
251 * this mountpoint. */
252 OCFS2_LA_ENABLED, /* Local alloc is in use. */
253 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
254 * of bits has been reduced. */
255 OCFS2_LA_DISABLED /* Local alloc has temporarily been
256 * disabled. */
257 };
258
259 enum ocfs2_mount_options
260 {
261 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
262 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
263 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
264 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
265 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
266 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
267 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
268 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
269 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
270 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
271 control lists */
272 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
273 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
274 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
275 writes */
276 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
277 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
278
279 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
280 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */
281 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */
282 };
283
284 #define OCFS2_OSB_SOFT_RO 0x0001
285 #define OCFS2_OSB_HARD_RO 0x0002
286 #define OCFS2_OSB_ERROR_FS 0x0004
287 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
288
289 struct ocfs2_journal;
290 struct ocfs2_slot_info;
291 struct ocfs2_recovery_map;
292 struct ocfs2_replay_map;
293 struct ocfs2_quota_recovery;
294 struct ocfs2_super
295 {
296 struct task_struct *commit_task;
297 struct super_block *sb;
298 struct inode *root_inode;
299 struct inode *sys_root_inode;
300 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
301 struct inode **local_system_inodes;
302
303 struct ocfs2_slot_info *slot_info;
304
305 u32 *slot_recovery_generations;
306
307 spinlock_t node_map_lock;
308
309 u64 root_blkno;
310 u64 system_dir_blkno;
311 u64 bitmap_blkno;
312 u32 bitmap_cpg;
313 char *uuid_str;
314 u32 uuid_hash;
315 u8 *vol_label;
316 u64 first_cluster_group_blkno;
317 u32 fs_generation;
318
319 u32 s_feature_compat;
320 u32 s_feature_incompat;
321 u32 s_feature_ro_compat;
322
323 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
324 * Could protect more on osb as it's very short lived.
325 */
326 spinlock_t osb_lock;
327 u32 s_next_generation;
328 unsigned long osb_flags;
329 u16 s_inode_steal_slot;
330 u16 s_meta_steal_slot;
331 atomic_t s_num_inodes_stolen;
332 atomic_t s_num_meta_stolen;
333
334 unsigned long s_mount_opt;
335 unsigned int s_atime_quantum;
336
337 unsigned int max_slots;
338 unsigned int node_num;
339 int slot_num;
340 int preferred_slot;
341 int s_sectsize_bits;
342 int s_clustersize;
343 int s_clustersize_bits;
344 unsigned int s_xattr_inline_size;
345
346 atomic_t vol_state;
347 struct mutex recovery_lock;
348 struct ocfs2_recovery_map *recovery_map;
349 struct ocfs2_replay_map *replay_map;
350 struct task_struct *recovery_thread_task;
351 int disable_recovery;
352 wait_queue_head_t checkpoint_event;
353 struct ocfs2_journal *journal;
354 unsigned long osb_commit_interval;
355
356 struct delayed_work la_enable_wq;
357
358 /*
359 * Must hold local alloc i_mutex and osb->osb_lock to change
360 * local_alloc_bits. Reads can be done under either lock.
361 */
362 unsigned int local_alloc_bits;
363 unsigned int local_alloc_default_bits;
364 /* osb_clusters_at_boot can become stale! Do not trust it to
365 * be up to date. */
366 unsigned int osb_clusters_at_boot;
367
368 enum ocfs2_local_alloc_state local_alloc_state; /* protected
369 * by osb_lock */
370
371 struct buffer_head *local_alloc_bh;
372
373 u64 la_last_gd;
374
375 struct ocfs2_reservation_map osb_la_resmap;
376
377 unsigned int osb_resv_level;
378 unsigned int osb_dir_resv_level;
379
380 /* Next two fields are for local node slot recovery during
381 * mount. */
382 struct ocfs2_dinode *local_alloc_copy;
383 struct ocfs2_quota_recovery *quota_rec;
384
385 struct ocfs2_blockcheck_stats osb_ecc_stats;
386 struct ocfs2_alloc_stats alloc_stats;
387 char dev_str[20]; /* "major,minor" of the device */
388
389 u8 osb_stackflags;
390
391 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
392 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
393 struct ocfs2_cluster_connection *cconn;
394 struct ocfs2_lock_res osb_super_lockres;
395 struct ocfs2_lock_res osb_rename_lockres;
396 struct ocfs2_lock_res osb_nfs_sync_lockres;
397 struct rw_semaphore nfs_sync_rwlock;
398 struct ocfs2_lock_res osb_trim_fs_lockres;
399 struct mutex obs_trim_fs_mutex;
400 struct ocfs2_dlm_debug *osb_dlm_debug;
401
402 struct dentry *osb_debug_root;
403
404 wait_queue_head_t recovery_event;
405
406 spinlock_t dc_task_lock;
407 struct task_struct *dc_task;
408 wait_queue_head_t dc_event;
409 unsigned long dc_wake_sequence;
410 unsigned long dc_work_sequence;
411
412 /*
413 * Any thread can add locks to the list, but the downconvert
414 * thread is the only one allowed to remove locks. Any change
415 * to this rule requires updating
416 * ocfs2_downconvert_thread_do_work().
417 */
418 struct list_head blocked_lock_list;
419 unsigned long blocked_lock_count;
420
421 /* List of dquot structures to drop last reference to */
422 struct llist_head dquot_drop_list;
423 struct work_struct dquot_drop_work;
424
425 wait_queue_head_t osb_mount_event;
426
427 /* Truncate log info */
428 struct inode *osb_tl_inode;
429 struct buffer_head *osb_tl_bh;
430 struct delayed_work osb_truncate_log_wq;
431 atomic_t osb_tl_disable;
432 /*
433 * How many clusters in our truncate log.
434 * It must be protected by osb_tl_inode->i_mutex.
435 */
436 unsigned int truncated_clusters;
437
438 struct ocfs2_node_map osb_recovering_orphan_dirs;
439 unsigned int *osb_orphan_wipes;
440 wait_queue_head_t osb_wipe_event;
441
442 struct ocfs2_orphan_scan osb_orphan_scan;
443
444 /* used to protect metaecc calculation check of xattr. */
445 spinlock_t osb_xattr_lock;
446
447 unsigned int osb_dx_mask;
448 u32 osb_dx_seed[4];
449
450 /* the group we used to allocate inodes. */
451 u64 osb_inode_alloc_group;
452
453 /* rb tree root for refcount lock. */
454 struct rb_root osb_rf_lock_tree;
455 struct ocfs2_refcount_tree *osb_ref_tree_lru;
456
457 struct mutex system_file_mutex;
458
459 /*
460 * OCFS2 needs to schedule several different types of work which
461 * require cluster locking, disk I/O, recovery waits, etc. Since these
462 * types of work tend to be heavy we avoid using the kernel events
463 * workqueue and schedule on our own.
464 */
465 struct workqueue_struct *ocfs2_wq;
466
467 /* sysfs directory per partition */
468 struct kset *osb_dev_kset;
469
470 /* file check related stuff */
471 struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
472 };
473
474 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
475
476 /* Useful typedef for passing around journal access functions */
477 typedef int (*ocfs2_journal_access_func)(handle_t *handle,
478 struct ocfs2_caching_info *ci,
479 struct buffer_head *bh, int type);
480
ocfs2_should_order_data(struct inode * inode)481 static inline int ocfs2_should_order_data(struct inode *inode)
482 {
483 if (!S_ISREG(inode->i_mode))
484 return 0;
485 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
486 return 0;
487 return 1;
488 }
489
ocfs2_sparse_alloc(struct ocfs2_super * osb)490 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
491 {
492 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
493 return 1;
494 return 0;
495 }
496
ocfs2_writes_unwritten_extents(struct ocfs2_super * osb)497 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
498 {
499 /*
500 * Support for sparse files is a pre-requisite
501 */
502 if (!ocfs2_sparse_alloc(osb))
503 return 0;
504
505 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
506 return 1;
507 return 0;
508 }
509
ocfs2_supports_append_dio(struct ocfs2_super * osb)510 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
511 {
512 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
513 return 1;
514 return 0;
515 }
516
517
ocfs2_supports_inline_data(struct ocfs2_super * osb)518 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
519 {
520 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
521 return 1;
522 return 0;
523 }
524
ocfs2_supports_xattr(struct ocfs2_super * osb)525 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
526 {
527 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
528 return 1;
529 return 0;
530 }
531
ocfs2_meta_ecc(struct ocfs2_super * osb)532 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
533 {
534 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
535 return 1;
536 return 0;
537 }
538
ocfs2_supports_indexed_dirs(struct ocfs2_super * osb)539 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
540 {
541 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
542 return 1;
543 return 0;
544 }
545
ocfs2_supports_discontig_bg(struct ocfs2_super * osb)546 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
547 {
548 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
549 return 1;
550 return 0;
551 }
552
ocfs2_link_max(struct ocfs2_super * osb)553 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
554 {
555 if (ocfs2_supports_indexed_dirs(osb))
556 return OCFS2_DX_LINK_MAX;
557 return OCFS2_LINK_MAX;
558 }
559
ocfs2_read_links_count(struct ocfs2_dinode * di)560 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
561 {
562 u32 nlink = le16_to_cpu(di->i_links_count);
563 u32 hi = le16_to_cpu(di->i_links_count_hi);
564
565 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
566 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
567
568 return nlink;
569 }
570
ocfs2_set_links_count(struct ocfs2_dinode * di,u32 nlink)571 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
572 {
573 u16 lo, hi;
574
575 lo = nlink;
576 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
577
578 di->i_links_count = cpu_to_le16(lo);
579 di->i_links_count_hi = cpu_to_le16(hi);
580 }
581
ocfs2_add_links_count(struct ocfs2_dinode * di,int n)582 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
583 {
584 u32 links = ocfs2_read_links_count(di);
585
586 links += n;
587
588 ocfs2_set_links_count(di, links);
589 }
590
ocfs2_refcount_tree(struct ocfs2_super * osb)591 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
592 {
593 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
594 return 1;
595 return 0;
596 }
597
598 /* set / clear functions because cluster events can make these happen
599 * in parallel so we want the transitions to be atomic. this also
600 * means that any future flags osb_flags must be protected by spinlock
601 * too! */
ocfs2_set_osb_flag(struct ocfs2_super * osb,unsigned long flag)602 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
603 unsigned long flag)
604 {
605 spin_lock(&osb->osb_lock);
606 osb->osb_flags |= flag;
607 spin_unlock(&osb->osb_lock);
608 }
609
ocfs2_set_ro_flag(struct ocfs2_super * osb,int hard)610 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
611 int hard)
612 {
613 spin_lock(&osb->osb_lock);
614 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
615 if (hard)
616 osb->osb_flags |= OCFS2_OSB_HARD_RO;
617 else
618 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
619 spin_unlock(&osb->osb_lock);
620 }
621
ocfs2_is_hard_readonly(struct ocfs2_super * osb)622 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
623 {
624 int ret;
625
626 spin_lock(&osb->osb_lock);
627 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
628 spin_unlock(&osb->osb_lock);
629
630 return ret;
631 }
632
ocfs2_is_soft_readonly(struct ocfs2_super * osb)633 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
634 {
635 int ret;
636
637 spin_lock(&osb->osb_lock);
638 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
639 spin_unlock(&osb->osb_lock);
640
641 return ret;
642 }
643
ocfs2_clusterinfo_valid(struct ocfs2_super * osb)644 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
645 {
646 return (osb->s_feature_incompat &
647 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
648 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
649 }
650
ocfs2_userspace_stack(struct ocfs2_super * osb)651 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
652 {
653 if (ocfs2_clusterinfo_valid(osb) &&
654 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
655 OCFS2_STACK_LABEL_LEN))
656 return 1;
657 return 0;
658 }
659
ocfs2_o2cb_stack(struct ocfs2_super * osb)660 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
661 {
662 if (ocfs2_clusterinfo_valid(osb) &&
663 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
664 OCFS2_STACK_LABEL_LEN))
665 return 1;
666 return 0;
667 }
668
ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super * osb)669 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
670 {
671 return ocfs2_o2cb_stack(osb) &&
672 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
673 }
674
ocfs2_mount_local(struct ocfs2_super * osb)675 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
676 {
677 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
678 }
679
ocfs2_uses_extended_slot_map(struct ocfs2_super * osb)680 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
681 {
682 return (osb->s_feature_incompat &
683 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
684 }
685
686
687 #define OCFS2_IS_VALID_DINODE(ptr) \
688 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
689
690 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
691 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
692
693 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
694 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
695
696
697 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
698 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
699
700 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
701 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
702
703 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
704 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
705
706 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
707 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
708
709 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
710 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
711
ino_from_blkno(struct super_block * sb,u64 blkno)712 static inline unsigned long ino_from_blkno(struct super_block *sb,
713 u64 blkno)
714 {
715 return (unsigned long)(blkno & (u64)ULONG_MAX);
716 }
717
ocfs2_clusters_to_blocks(struct super_block * sb,u32 clusters)718 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
719 u32 clusters)
720 {
721 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
722 sb->s_blocksize_bits;
723
724 return (u64)clusters << c_to_b_bits;
725 }
726
ocfs2_clusters_for_blocks(struct super_block * sb,u64 blocks)727 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
728 u64 blocks)
729 {
730 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
731 sb->s_blocksize_bits;
732
733 blocks += (1 << b_to_c_bits) - 1;
734 return (u32)(blocks >> b_to_c_bits);
735 }
736
ocfs2_blocks_to_clusters(struct super_block * sb,u64 blocks)737 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
738 u64 blocks)
739 {
740 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
741 sb->s_blocksize_bits;
742
743 return (u32)(blocks >> b_to_c_bits);
744 }
745
ocfs2_clusters_for_bytes(struct super_block * sb,u64 bytes)746 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
747 u64 bytes)
748 {
749 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
750 unsigned int clusters;
751
752 bytes += OCFS2_SB(sb)->s_clustersize - 1;
753 /* OCFS2 just cannot have enough clusters to overflow this */
754 clusters = (unsigned int)(bytes >> cl_bits);
755
756 return clusters;
757 }
758
ocfs2_bytes_to_clusters(struct super_block * sb,u64 bytes)759 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
760 u64 bytes)
761 {
762 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
763 unsigned int clusters;
764
765 clusters = (unsigned int)(bytes >> cl_bits);
766 return clusters;
767 }
768
ocfs2_blocks_for_bytes(struct super_block * sb,u64 bytes)769 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
770 u64 bytes)
771 {
772 bytes += sb->s_blocksize - 1;
773 return bytes >> sb->s_blocksize_bits;
774 }
775
ocfs2_clusters_to_bytes(struct super_block * sb,u32 clusters)776 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
777 u32 clusters)
778 {
779 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
780 }
781
ocfs2_block_to_cluster_start(struct super_block * sb,u64 blocks)782 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
783 u64 blocks)
784 {
785 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
786 unsigned int clusters;
787
788 clusters = ocfs2_blocks_to_clusters(sb, blocks);
789 return (u64)clusters << bits;
790 }
791
ocfs2_align_bytes_to_clusters(struct super_block * sb,u64 bytes)792 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
793 u64 bytes)
794 {
795 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
796 unsigned int clusters;
797
798 clusters = ocfs2_clusters_for_bytes(sb, bytes);
799 return (u64)clusters << cl_bits;
800 }
801
ocfs2_align_bytes_to_blocks(struct super_block * sb,u64 bytes)802 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
803 u64 bytes)
804 {
805 u64 blocks;
806
807 blocks = ocfs2_blocks_for_bytes(sb, bytes);
808 return blocks << sb->s_blocksize_bits;
809 }
810
ocfs2_align_bytes_to_sectors(u64 bytes)811 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
812 {
813 return (unsigned long)((bytes + 511) >> 9);
814 }
815
ocfs2_page_index_to_clusters(struct super_block * sb,unsigned long pg_index)816 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
817 unsigned long pg_index)
818 {
819 u32 clusters = pg_index;
820 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
821
822 if (unlikely(PAGE_SHIFT > cbits))
823 clusters = pg_index << (PAGE_SHIFT - cbits);
824 else if (PAGE_SHIFT < cbits)
825 clusters = pg_index >> (cbits - PAGE_SHIFT);
826
827 return clusters;
828 }
829
830 /*
831 * Find the 1st page index which covers the given clusters.
832 */
ocfs2_align_clusters_to_page_index(struct super_block * sb,u32 clusters)833 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
834 u32 clusters)
835 {
836 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
837 pgoff_t index = clusters;
838
839 if (PAGE_SHIFT > cbits) {
840 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
841 } else if (PAGE_SHIFT < cbits) {
842 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
843 }
844
845 return index;
846 }
847
ocfs2_pages_per_cluster(struct super_block * sb)848 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
849 {
850 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
851 unsigned int pages_per_cluster = 1;
852
853 if (PAGE_SHIFT < cbits)
854 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
855
856 return pages_per_cluster;
857 }
858
ocfs2_megabytes_to_clusters(struct super_block * sb,unsigned int megs)859 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
860 unsigned int megs)
861 {
862 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
863
864 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
865 }
866
ocfs2_clusters_to_megabytes(struct super_block * sb,unsigned int clusters)867 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
868 unsigned int clusters)
869 {
870 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
871 }
872
_ocfs2_set_bit(unsigned int bit,unsigned long * bitmap)873 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
874 {
875 __set_bit_le(bit, bitmap);
876 }
877 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
878
_ocfs2_clear_bit(unsigned int bit,unsigned long * bitmap)879 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
880 {
881 __clear_bit_le(bit, bitmap);
882 }
883 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
884
885 #define ocfs2_test_bit test_bit_le
886 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
887 #define ocfs2_find_next_bit find_next_bit_le
888
correct_addr_and_bit_unaligned(int * bit,void * addr)889 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
890 {
891 #if BITS_PER_LONG == 64
892 *bit += ((unsigned long) addr & 7UL) << 3;
893 addr = (void *) ((unsigned long) addr & ~7UL);
894 #elif BITS_PER_LONG == 32
895 *bit += ((unsigned long) addr & 3UL) << 3;
896 addr = (void *) ((unsigned long) addr & ~3UL);
897 #else
898 #error "how many bits you are?!"
899 #endif
900 return addr;
901 }
902
ocfs2_set_bit_unaligned(int bit,void * bitmap)903 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
904 {
905 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
906 ocfs2_set_bit(bit, bitmap);
907 }
908
ocfs2_clear_bit_unaligned(int bit,void * bitmap)909 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
910 {
911 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
912 ocfs2_clear_bit(bit, bitmap);
913 }
914
ocfs2_test_bit_unaligned(int bit,void * bitmap)915 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
916 {
917 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
918 return ocfs2_test_bit(bit, bitmap);
919 }
920
ocfs2_find_next_zero_bit_unaligned(void * bitmap,int max,int start)921 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
922 int start)
923 {
924 int fix = 0, ret, tmpmax;
925 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
926 tmpmax = max + fix;
927 start += fix;
928
929 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
930 if (ret > max)
931 return max;
932 return ret;
933 }
934
935 #endif /* OCFS2_H */
936
937