xref: /linux/fs/ocfs2/ocfs2.h (revision a1ff5a7d78a036d6c2178ee5acd6ba4946243800)
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 	const 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 struct ocfs2_journal;
312 struct ocfs2_slot_info;
313 struct ocfs2_recovery_map;
314 struct ocfs2_replay_map;
315 struct ocfs2_quota_recovery;
316 struct ocfs2_super
317 {
318 	struct task_struct *commit_task;
319 	struct super_block *sb;
320 	struct inode *root_inode;
321 	struct inode *sys_root_inode;
322 	struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
323 	struct inode **local_system_inodes;
324 
325 	struct ocfs2_slot_info *slot_info;
326 
327 	u32 *slot_recovery_generations;
328 
329 	spinlock_t node_map_lock;
330 
331 	u64 root_blkno;
332 	u64 system_dir_blkno;
333 	u64 bitmap_blkno;
334 	u32 bitmap_cpg;
335 	char *uuid_str;
336 	u32 uuid_hash;
337 	u8 *vol_label;
338 	u64 first_cluster_group_blkno;
339 	u32 fs_generation;
340 
341 	u32 s_feature_compat;
342 	u32 s_feature_incompat;
343 	u32 s_feature_ro_compat;
344 
345 	/* Protects s_next_generation, osb_flags and s_inode_steal_slot.
346 	 * Could protect more on osb as it's very short lived.
347 	 */
348 	spinlock_t osb_lock;
349 	u32 s_next_generation;
350 	unsigned long osb_flags;
351 	u16 s_inode_steal_slot;
352 	u16 s_meta_steal_slot;
353 	atomic_t s_num_inodes_stolen;
354 	atomic_t s_num_meta_stolen;
355 
356 	unsigned long s_mount_opt;
357 	unsigned int s_atime_quantum;
358 
359 	unsigned int max_slots;
360 	unsigned int node_num;
361 	int slot_num;
362 	int preferred_slot;
363 	int s_sectsize_bits;
364 	int s_clustersize;
365 	int s_clustersize_bits;
366 	unsigned int s_xattr_inline_size;
367 
368 	atomic_t vol_state;
369 	struct mutex recovery_lock;
370 	struct ocfs2_recovery_map *recovery_map;
371 	struct ocfs2_replay_map *replay_map;
372 	struct task_struct *recovery_thread_task;
373 	int disable_recovery;
374 	wait_queue_head_t checkpoint_event;
375 	struct ocfs2_journal *journal;
376 	unsigned long osb_commit_interval;
377 
378 	/* Journal triggers for checksum */
379 	struct ocfs2_triggers s_journal_triggers[OCFS2_JOURNAL_TRIGGER_COUNT];
380 
381 	struct delayed_work		la_enable_wq;
382 
383 	/*
384 	 * Must hold local alloc i_rwsem and osb->osb_lock to change
385 	 * local_alloc_bits. Reads can be done under either lock.
386 	 */
387 	unsigned int local_alloc_bits;
388 	unsigned int local_alloc_default_bits;
389 	/* osb_clusters_at_boot can become stale! Do not trust it to
390 	 * be up to date. */
391 	unsigned int osb_clusters_at_boot;
392 
393 	enum ocfs2_local_alloc_state local_alloc_state; /* protected
394 							 * by osb_lock */
395 
396 	struct buffer_head *local_alloc_bh;
397 
398 	u64 la_last_gd;
399 
400 	struct ocfs2_reservation_map	osb_la_resmap;
401 
402 	unsigned int	osb_resv_level;
403 	unsigned int	osb_dir_resv_level;
404 
405 	/* Next two fields are for local node slot recovery during
406 	 * mount. */
407 	struct ocfs2_dinode *local_alloc_copy;
408 	struct ocfs2_quota_recovery *quota_rec;
409 
410 	struct ocfs2_blockcheck_stats osb_ecc_stats;
411 	struct ocfs2_alloc_stats alloc_stats;
412 	char dev_str[20];		/* "major,minor" of the device */
413 
414 	u8 osb_stackflags;
415 
416 	char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
417 	char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
418 	struct ocfs2_cluster_connection *cconn;
419 	struct ocfs2_lock_res osb_super_lockres;
420 	struct ocfs2_lock_res osb_rename_lockres;
421 	struct ocfs2_lock_res osb_nfs_sync_lockres;
422 	struct rw_semaphore nfs_sync_rwlock;
423 	struct ocfs2_lock_res osb_trim_fs_lockres;
424 	struct mutex obs_trim_fs_mutex;
425 	struct ocfs2_dlm_debug *osb_dlm_debug;
426 
427 	struct dentry *osb_debug_root;
428 
429 	wait_queue_head_t recovery_event;
430 
431 	spinlock_t dc_task_lock;
432 	struct task_struct *dc_task;
433 	wait_queue_head_t dc_event;
434 	unsigned long dc_wake_sequence;
435 	unsigned long dc_work_sequence;
436 
437 	/*
438 	 * Any thread can add locks to the list, but the downconvert
439 	 * thread is the only one allowed to remove locks. Any change
440 	 * to this rule requires updating
441 	 * ocfs2_downconvert_thread_do_work().
442 	 */
443 	struct list_head blocked_lock_list;
444 	unsigned long blocked_lock_count;
445 
446 	/* List of dquot structures to drop last reference to */
447 	struct llist_head dquot_drop_list;
448 	struct work_struct dquot_drop_work;
449 
450 	wait_queue_head_t		osb_mount_event;
451 
452 	/* Truncate log info */
453 	struct inode			*osb_tl_inode;
454 	struct buffer_head		*osb_tl_bh;
455 	struct delayed_work		osb_truncate_log_wq;
456 	atomic_t			osb_tl_disable;
457 	/*
458 	 * How many clusters in our truncate log.
459 	 * It must be protected by osb_tl_inode->i_rwsem.
460 	 */
461 	unsigned int truncated_clusters;
462 
463 	struct ocfs2_node_map		osb_recovering_orphan_dirs;
464 	unsigned int			*osb_orphan_wipes;
465 	wait_queue_head_t		osb_wipe_event;
466 
467 	struct ocfs2_orphan_scan	osb_orphan_scan;
468 
469 	/* used to protect metaecc calculation check of xattr. */
470 	spinlock_t osb_xattr_lock;
471 
472 	unsigned int			osb_dx_mask;
473 	u32				osb_dx_seed[4];
474 
475 	/* the group we used to allocate inodes. */
476 	u64				osb_inode_alloc_group;
477 
478 	/* rb tree root for refcount lock. */
479 	struct rb_root	osb_rf_lock_tree;
480 	struct ocfs2_refcount_tree *osb_ref_tree_lru;
481 
482 	struct mutex system_file_mutex;
483 
484 	/*
485 	 * OCFS2 needs to schedule several different types of work which
486 	 * require cluster locking, disk I/O, recovery waits, etc. Since these
487 	 * types of work tend to be heavy we avoid using the kernel events
488 	 * workqueue and schedule on our own.
489 	 */
490 	struct workqueue_struct *ocfs2_wq;
491 
492 	/* sysfs directory per partition */
493 	struct kset *osb_dev_kset;
494 
495 	/* file check related stuff */
496 	struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
497 };
498 
499 #define OCFS2_SB(sb)	    ((struct ocfs2_super *)(sb)->s_fs_info)
500 
501 /* Useful typedef for passing around journal access functions */
502 typedef int (*ocfs2_journal_access_func)(handle_t *handle,
503 					 struct ocfs2_caching_info *ci,
504 					 struct buffer_head *bh, int type);
505 
ocfs2_should_order_data(struct inode * inode)506 static inline int ocfs2_should_order_data(struct inode *inode)
507 {
508 	if (!S_ISREG(inode->i_mode))
509 		return 0;
510 	if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
511 		return 0;
512 	return 1;
513 }
514 
ocfs2_sparse_alloc(struct ocfs2_super * osb)515 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
516 {
517 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
518 		return 1;
519 	return 0;
520 }
521 
ocfs2_writes_unwritten_extents(struct ocfs2_super * osb)522 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
523 {
524 	/*
525 	 * Support for sparse files is a pre-requisite
526 	 */
527 	if (!ocfs2_sparse_alloc(osb))
528 		return 0;
529 
530 	if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
531 		return 1;
532 	return 0;
533 }
534 
ocfs2_supports_append_dio(struct ocfs2_super * osb)535 static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
536 {
537 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
538 		return 1;
539 	return 0;
540 }
541 
542 
ocfs2_supports_inline_data(struct ocfs2_super * osb)543 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
544 {
545 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
546 		return 1;
547 	return 0;
548 }
549 
ocfs2_supports_xattr(struct ocfs2_super * osb)550 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
551 {
552 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
553 		return 1;
554 	return 0;
555 }
556 
ocfs2_meta_ecc(struct ocfs2_super * osb)557 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
558 {
559 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
560 		return 1;
561 	return 0;
562 }
563 
ocfs2_supports_indexed_dirs(struct ocfs2_super * osb)564 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
565 {
566 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
567 		return 1;
568 	return 0;
569 }
570 
ocfs2_supports_discontig_bg(struct ocfs2_super * osb)571 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
572 {
573 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
574 		return 1;
575 	return 0;
576 }
577 
ocfs2_link_max(struct ocfs2_super * osb)578 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
579 {
580 	if (ocfs2_supports_indexed_dirs(osb))
581 		return OCFS2_DX_LINK_MAX;
582 	return OCFS2_LINK_MAX;
583 }
584 
ocfs2_read_links_count(struct ocfs2_dinode * di)585 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
586 {
587 	u32 nlink = le16_to_cpu(di->i_links_count);
588 	u32 hi = le16_to_cpu(di->i_links_count_hi);
589 
590 	nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
591 
592 	return nlink;
593 }
594 
ocfs2_set_links_count(struct ocfs2_dinode * di,u32 nlink)595 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
596 {
597 	u16 lo, hi;
598 
599 	lo = nlink;
600 	hi = nlink >> OCFS2_LINKS_HI_SHIFT;
601 
602 	di->i_links_count = cpu_to_le16(lo);
603 	di->i_links_count_hi = cpu_to_le16(hi);
604 }
605 
ocfs2_add_links_count(struct ocfs2_dinode * di,int n)606 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
607 {
608 	u32 links = ocfs2_read_links_count(di);
609 
610 	links += n;
611 
612 	ocfs2_set_links_count(di, links);
613 }
614 
ocfs2_refcount_tree(struct ocfs2_super * osb)615 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
616 {
617 	if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
618 		return 1;
619 	return 0;
620 }
621 
622 /* set / clear functions because cluster events can make these happen
623  * in parallel so we want the transitions to be atomic. this also
624  * means that any future flags osb_flags must be protected by spinlock
625  * too! */
ocfs2_set_osb_flag(struct ocfs2_super * osb,unsigned long flag)626 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
627 				      unsigned long flag)
628 {
629 	spin_lock(&osb->osb_lock);
630 	osb->osb_flags |= flag;
631 	spin_unlock(&osb->osb_lock);
632 }
633 
ocfs2_set_ro_flag(struct ocfs2_super * osb,int hard)634 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
635 				     int hard)
636 {
637 	spin_lock(&osb->osb_lock);
638 	osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
639 	if (hard)
640 		osb->osb_flags |= OCFS2_OSB_HARD_RO;
641 	else
642 		osb->osb_flags |= OCFS2_OSB_SOFT_RO;
643 	spin_unlock(&osb->osb_lock);
644 }
645 
ocfs2_is_hard_readonly(struct ocfs2_super * osb)646 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
647 {
648 	int ret;
649 
650 	spin_lock(&osb->osb_lock);
651 	ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
652 	spin_unlock(&osb->osb_lock);
653 
654 	return ret;
655 }
656 
ocfs2_is_soft_readonly(struct ocfs2_super * osb)657 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
658 {
659 	int ret;
660 
661 	spin_lock(&osb->osb_lock);
662 	ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
663 	spin_unlock(&osb->osb_lock);
664 
665 	return ret;
666 }
667 
ocfs2_clusterinfo_valid(struct ocfs2_super * osb)668 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
669 {
670 	return (osb->s_feature_incompat &
671 		(OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
672 		 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
673 }
674 
ocfs2_userspace_stack(struct ocfs2_super * osb)675 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
676 {
677 	if (ocfs2_clusterinfo_valid(osb) &&
678 	    memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
679 		   OCFS2_STACK_LABEL_LEN))
680 		return 1;
681 	return 0;
682 }
683 
ocfs2_o2cb_stack(struct ocfs2_super * osb)684 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
685 {
686 	if (ocfs2_clusterinfo_valid(osb) &&
687 	    !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
688 		   OCFS2_STACK_LABEL_LEN))
689 		return 1;
690 	return 0;
691 }
692 
ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super * osb)693 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
694 {
695 	return ocfs2_o2cb_stack(osb) &&
696 		(osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
697 }
698 
ocfs2_mount_local(struct ocfs2_super * osb)699 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
700 {
701 	return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
702 }
703 
ocfs2_uses_extended_slot_map(struct ocfs2_super * osb)704 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
705 {
706 	return (osb->s_feature_incompat &
707 		OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
708 }
709 
710 
711 #define OCFS2_IS_VALID_DINODE(ptr)					\
712 	(!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
713 
714 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr)				\
715 	(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
716 
717 #define OCFS2_IS_VALID_GROUP_DESC(ptr)					\
718 	(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
719 
720 
721 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr)					\
722 	(!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
723 
724 #define OCFS2_IS_VALID_DIR_TRAILER(ptr)					\
725 	(!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
726 
727 #define OCFS2_IS_VALID_DX_ROOT(ptr)					\
728 	(!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
729 
730 #define OCFS2_IS_VALID_DX_LEAF(ptr)					\
731 	(!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
732 
733 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr)				\
734 	(!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
735 
ino_from_blkno(struct super_block * sb,u64 blkno)736 static inline unsigned long ino_from_blkno(struct super_block *sb,
737 					   u64 blkno)
738 {
739 	return (unsigned long)(blkno & (u64)ULONG_MAX);
740 }
741 
ocfs2_clusters_to_blocks(struct super_block * sb,u32 clusters)742 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
743 					   u32 clusters)
744 {
745 	int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
746 		sb->s_blocksize_bits;
747 
748 	return (u64)clusters << c_to_b_bits;
749 }
750 
ocfs2_clusters_for_blocks(struct super_block * sb,u64 blocks)751 static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
752 		u64 blocks)
753 {
754 	int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
755 			sb->s_blocksize_bits;
756 
757 	blocks += (1 << b_to_c_bits) - 1;
758 	return (u32)(blocks >> b_to_c_bits);
759 }
760 
ocfs2_blocks_to_clusters(struct super_block * sb,u64 blocks)761 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
762 					   u64 blocks)
763 {
764 	int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
765 		sb->s_blocksize_bits;
766 
767 	return (u32)(blocks >> b_to_c_bits);
768 }
769 
ocfs2_clusters_for_bytes(struct super_block * sb,u64 bytes)770 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
771 						    u64 bytes)
772 {
773 	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
774 	unsigned int clusters;
775 
776 	bytes += OCFS2_SB(sb)->s_clustersize - 1;
777 	/* OCFS2 just cannot have enough clusters to overflow this */
778 	clusters = (unsigned int)(bytes >> cl_bits);
779 
780 	return clusters;
781 }
782 
ocfs2_bytes_to_clusters(struct super_block * sb,u64 bytes)783 static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
784 		u64 bytes)
785 {
786 	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
787 	unsigned int clusters;
788 
789 	clusters = (unsigned int)(bytes >> cl_bits);
790 	return clusters;
791 }
792 
ocfs2_blocks_for_bytes(struct super_block * sb,u64 bytes)793 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
794 					 u64 bytes)
795 {
796 	bytes += sb->s_blocksize - 1;
797 	return bytes >> sb->s_blocksize_bits;
798 }
799 
ocfs2_clusters_to_bytes(struct super_block * sb,u32 clusters)800 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
801 					  u32 clusters)
802 {
803 	return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
804 }
805 
ocfs2_block_to_cluster_start(struct super_block * sb,u64 blocks)806 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
807 					       u64 blocks)
808 {
809 	int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
810 	unsigned int clusters;
811 
812 	clusters = ocfs2_blocks_to_clusters(sb, blocks);
813 	return (u64)clusters << bits;
814 }
815 
ocfs2_align_bytes_to_clusters(struct super_block * sb,u64 bytes)816 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
817 						u64 bytes)
818 {
819 	int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
820 	unsigned int clusters;
821 
822 	clusters = ocfs2_clusters_for_bytes(sb, bytes);
823 	return (u64)clusters << cl_bits;
824 }
825 
ocfs2_align_bytes_to_blocks(struct super_block * sb,u64 bytes)826 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
827 					      u64 bytes)
828 {
829 	u64 blocks;
830 
831         blocks = ocfs2_blocks_for_bytes(sb, bytes);
832 	return blocks << sb->s_blocksize_bits;
833 }
834 
ocfs2_align_bytes_to_sectors(u64 bytes)835 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
836 {
837 	return (unsigned long)((bytes + 511) >> 9);
838 }
839 
ocfs2_page_index_to_clusters(struct super_block * sb,unsigned long pg_index)840 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
841 							unsigned long pg_index)
842 {
843 	u32 clusters = pg_index;
844 	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
845 
846 	if (unlikely(PAGE_SHIFT > cbits))
847 		clusters = pg_index << (PAGE_SHIFT - cbits);
848 	else if (PAGE_SHIFT < cbits)
849 		clusters = pg_index >> (cbits - PAGE_SHIFT);
850 
851 	return clusters;
852 }
853 
854 /*
855  * Find the 1st page index which covers the given clusters.
856  */
ocfs2_align_clusters_to_page_index(struct super_block * sb,u32 clusters)857 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
858 							u32 clusters)
859 {
860 	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
861         pgoff_t index = clusters;
862 
863 	if (PAGE_SHIFT > cbits) {
864 		index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
865 	} else if (PAGE_SHIFT < cbits) {
866 		index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
867 	}
868 
869 	return index;
870 }
871 
ocfs2_pages_per_cluster(struct super_block * sb)872 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
873 {
874 	unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
875 	unsigned int pages_per_cluster = 1;
876 
877 	if (PAGE_SHIFT < cbits)
878 		pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
879 
880 	return pages_per_cluster;
881 }
882 
ocfs2_megabytes_to_clusters(struct super_block * sb,unsigned int megs)883 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
884 						       unsigned int megs)
885 {
886 	BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
887 
888 	return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
889 }
890 
ocfs2_clusters_to_megabytes(struct super_block * sb,unsigned int clusters)891 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
892 						       unsigned int clusters)
893 {
894 	return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
895 }
896 
_ocfs2_set_bit(unsigned int bit,unsigned long * bitmap)897 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
898 {
899 	__set_bit_le(bit, bitmap);
900 }
901 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
902 
_ocfs2_clear_bit(unsigned int bit,unsigned long * bitmap)903 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
904 {
905 	__clear_bit_le(bit, bitmap);
906 }
907 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
908 
909 #define ocfs2_test_bit test_bit_le
910 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
911 #define ocfs2_find_next_bit find_next_bit_le
912 
correct_addr_and_bit_unaligned(int * bit,void * addr)913 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
914 {
915 #if BITS_PER_LONG == 64
916 	*bit += ((unsigned long) addr & 7UL) << 3;
917 	addr = (void *) ((unsigned long) addr & ~7UL);
918 #elif BITS_PER_LONG == 32
919 	*bit += ((unsigned long) addr & 3UL) << 3;
920 	addr = (void *) ((unsigned long) addr & ~3UL);
921 #else
922 #error "how many bits you are?!"
923 #endif
924 	return addr;
925 }
926 
ocfs2_set_bit_unaligned(int bit,void * bitmap)927 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
928 {
929 	bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
930 	ocfs2_set_bit(bit, bitmap);
931 }
932 
ocfs2_clear_bit_unaligned(int bit,void * bitmap)933 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
934 {
935 	bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
936 	ocfs2_clear_bit(bit, bitmap);
937 }
938 
ocfs2_test_bit_unaligned(int bit,void * bitmap)939 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
940 {
941 	bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
942 	return ocfs2_test_bit(bit, bitmap);
943 }
944 
ocfs2_find_next_zero_bit_unaligned(void * bitmap,int max,int start)945 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
946 							int start)
947 {
948 	int fix = 0, ret, tmpmax;
949 	bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
950 	tmpmax = max + fix;
951 	start += fix;
952 
953 	ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
954 	if (ret > max)
955 		return max;
956 	return ret;
957 }
958 
959 #endif  /* OCFS2_H */
960 
961