1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * ocfs2.h
5 *
6 * Defines macros and structures used in OCFS2
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26 #ifndef OCFS2_H
27 #define OCFS2_H
28
29 #include <linux/spinlock.h>
30 #include <linux/sched.h>
31 #include <linux/wait.h>
32 #include <linux/list.h>
33 #include <linux/llist.h>
34 #include <linux/rbtree.h>
35 #include <linux/workqueue.h>
36 #include <linux/kref.h>
37 #include <linux/mutex.h>
38 #include <linux/lockdep.h>
39 #include <linux/jbd2.h>
40
41 /* For union ocfs2_dlm_lksb */
42 #include "stackglue.h"
43
44 #include "ocfs2_fs.h"
45 #include "ocfs2_lockid.h"
46 #include "ocfs2_ioctl.h"
47
48 /* For struct ocfs2_blockcheck_stats */
49 #include "blockcheck.h"
50
51 #include "reservations.h"
52
53 /* Caching of metadata buffers */
54
55 /* Most user visible OCFS2 inodes will have very few pieces of
56 * metadata, but larger files (including bitmaps, etc) must be taken
57 * into account when designing an access scheme. We allow a small
58 * amount of inlined blocks to be stored on an array and grow the
59 * structure into a rb tree when necessary. */
60 #define OCFS2_CACHE_INFO_MAX_ARRAY 2
61
62 /* Flags for ocfs2_caching_info */
63
64 enum ocfs2_caching_info_flags {
65 /* Indicates that the metadata cache is using the inline array */
66 OCFS2_CACHE_FL_INLINE = 1<<1,
67 };
68
69 struct ocfs2_caching_operations;
70 struct ocfs2_caching_info {
71 /*
72 * The parent structure provides the locks, but because the
73 * parent structure can differ, it provides locking operations
74 * to struct ocfs2_caching_info.
75 */
76 const struct ocfs2_caching_operations *ci_ops;
77
78 /* next two are protected by trans_inc_lock */
79 /* which transaction were we created on? Zero if none. */
80 unsigned long ci_created_trans;
81 /* last transaction we were a part of. */
82 unsigned long ci_last_trans;
83
84 /* Cache structures */
85 unsigned int ci_flags;
86 unsigned int ci_num_cached;
87 union {
88 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
89 struct rb_root ci_tree;
90 } ci_cache;
91 };
92 /*
93 * Need this prototype here instead of in uptodate.h because journal.h
94 * uses it.
95 */
96 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
97
98 /* this limits us to 256 nodes
99 * if we need more, we can do a kmalloc for the map */
100 #define OCFS2_NODE_MAP_MAX_NODES 256
101 struct ocfs2_node_map {
102 u16 num_nodes;
103 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
104 };
105
106 enum ocfs2_ast_action {
107 OCFS2_AST_INVALID = 0,
108 OCFS2_AST_ATTACH,
109 OCFS2_AST_CONVERT,
110 OCFS2_AST_DOWNCONVERT,
111 };
112
113 /* actions for an unlockast function to take. */
114 enum ocfs2_unlock_action {
115 OCFS2_UNLOCK_INVALID = 0,
116 OCFS2_UNLOCK_CANCEL_CONVERT,
117 OCFS2_UNLOCK_DROP_LOCK,
118 };
119
120 /* ocfs2_lock_res->l_flags flags. */
121 #define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
122 * the lvb */
123 #define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
124 * dlm_lock */
125 #define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
126 * downconvert*/
127 #define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
128 #define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
129 #define OCFS2_LOCK_REFRESHING (0x00000020)
130 #define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
131 * for shutdown paths */
132 #define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
133 * when to skip queueing
134 * a lock because it's
135 * about to be
136 * dropped. */
137 #define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
138 #define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
139 #define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
140 call to dlm_lock. Only
141 exists with BUSY set. */
142 #define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
143 * from downconverting
144 * before the upconvert
145 * has completed */
146
147 struct ocfs2_lock_res_ops;
148
149 typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
150
151 #ifdef CONFIG_OCFS2_FS_STATS
152 struct ocfs2_lock_stats {
153 u64 ls_total; /* Total wait in NSEC */
154 u32 ls_gets; /* Num acquires */
155 u32 ls_fail; /* Num failed acquires */
156
157 /* Storing max wait in usecs saves 24 bytes per inode */
158 u32 ls_max; /* Max wait in USEC */
159 };
160 #endif
161
162 struct ocfs2_lock_res {
163 void *l_priv;
164 struct ocfs2_lock_res_ops *l_ops;
165
166
167 struct list_head l_blocked_list;
168 struct list_head l_mask_waiters;
169 struct list_head l_holders;
170
171 unsigned long l_flags;
172 char l_name[OCFS2_LOCK_ID_MAX_LEN];
173 unsigned int l_ro_holders;
174 unsigned int l_ex_holders;
175 signed char l_level;
176 signed char l_requested;
177 signed char l_blocking;
178
179 /* Data packed - type enum ocfs2_lock_type */
180 unsigned char l_type;
181
182 /* used from AST/BAST funcs. */
183 /* Data packed - enum type ocfs2_ast_action */
184 unsigned char l_action;
185 /* Data packed - enum type ocfs2_unlock_action */
186 unsigned char l_unlock_action;
187 unsigned int l_pending_gen;
188
189 spinlock_t l_lock;
190
191 struct ocfs2_dlm_lksb l_lksb;
192
193 wait_queue_head_t l_event;
194
195 struct list_head l_debug_list;
196
197 #ifdef CONFIG_OCFS2_FS_STATS
198 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
199 u32 l_lock_refresh; /* Disk refreshes */
200 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
201 #endif
202 #ifdef CONFIG_DEBUG_LOCK_ALLOC
203 struct lockdep_map l_lockdep_map;
204 #endif
205 };
206
207 enum ocfs2_orphan_scan_state {
208 ORPHAN_SCAN_ACTIVE,
209 ORPHAN_SCAN_INACTIVE
210 };
211
212 struct ocfs2_orphan_scan {
213 struct mutex os_lock;
214 struct ocfs2_super *os_osb;
215 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
216 struct delayed_work os_orphan_scan_work;
217 struct timespec os_scantime; /* time this node ran the scan */
218 u32 os_count; /* tracks node specific scans */
219 u32 os_seqno; /* tracks cluster wide scans */
220 atomic_t os_state; /* ACTIVE or INACTIVE */
221 };
222
223 struct ocfs2_dlm_debug {
224 struct kref d_refcnt;
225 struct dentry *d_locking_state;
226 struct list_head d_lockres_tracking;
227 };
228
229 enum ocfs2_vol_state
230 {
231 VOLUME_INIT = 0,
232 VOLUME_MOUNTED,
233 VOLUME_MOUNTED_QUOTAS,
234 VOLUME_DISMOUNTED,
235 VOLUME_DISABLED
236 };
237
238 struct ocfs2_alloc_stats
239 {
240 atomic_t moves;
241 atomic_t local_data;
242 atomic_t bitmap_data;
243 atomic_t bg_allocs;
244 atomic_t bg_extends;
245 };
246
247 enum ocfs2_local_alloc_state
248 {
249 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
250 * this mountpoint. */
251 OCFS2_LA_ENABLED, /* Local alloc is in use. */
252 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
253 * of bits has been reduced. */
254 OCFS2_LA_DISABLED /* Local alloc has temporarily been
255 * disabled. */
256 };
257
258 enum ocfs2_mount_options
259 {
260 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
261 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
262 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
263 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
264 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
265 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
266 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
267 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
268 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
269 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
270 control lists */
271 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
272 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
273 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
274 writes */
275 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
276 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
277 };
278
279 #define OCFS2_OSB_SOFT_RO 0x0001
280 #define OCFS2_OSB_HARD_RO 0x0002
281 #define OCFS2_OSB_ERROR_FS 0x0004
282 #define OCFS2_DEFAULT_ATIME_QUANTUM 60
283
284 struct ocfs2_journal;
285 struct ocfs2_slot_info;
286 struct ocfs2_recovery_map;
287 struct ocfs2_replay_map;
288 struct ocfs2_quota_recovery;
289 struct ocfs2_super
290 {
291 struct task_struct *commit_task;
292 struct super_block *sb;
293 struct inode *root_inode;
294 struct inode *sys_root_inode;
295 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
296 struct inode **local_system_inodes;
297
298 struct ocfs2_slot_info *slot_info;
299
300 u32 *slot_recovery_generations;
301
302 spinlock_t node_map_lock;
303
304 u64 root_blkno;
305 u64 system_dir_blkno;
306 u64 bitmap_blkno;
307 u32 bitmap_cpg;
308 u8 *uuid;
309 char *uuid_str;
310 u32 uuid_hash;
311 u8 *vol_label;
312 u64 first_cluster_group_blkno;
313 u32 fs_generation;
314
315 u32 s_feature_compat;
316 u32 s_feature_incompat;
317 u32 s_feature_ro_compat;
318
319 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
320 * Could protect more on osb as it's very short lived.
321 */
322 spinlock_t osb_lock;
323 u32 s_next_generation;
324 unsigned long osb_flags;
325 s16 s_inode_steal_slot;
326 s16 s_meta_steal_slot;
327 atomic_t s_num_inodes_stolen;
328 atomic_t s_num_meta_stolen;
329
330 unsigned long s_mount_opt;
331 unsigned int s_atime_quantum;
332
333 unsigned int max_slots;
334 unsigned int node_num;
335 int slot_num;
336 int preferred_slot;
337 int s_sectsize_bits;
338 int s_clustersize;
339 int s_clustersize_bits;
340 unsigned int s_xattr_inline_size;
341
342 atomic_t vol_state;
343 struct mutex recovery_lock;
344 struct ocfs2_recovery_map *recovery_map;
345 struct ocfs2_replay_map *replay_map;
346 struct task_struct *recovery_thread_task;
347 int disable_recovery;
348 wait_queue_head_t checkpoint_event;
349 struct ocfs2_journal *journal;
350 unsigned long osb_commit_interval;
351
352 struct delayed_work la_enable_wq;
353
354 /*
355 * Must hold local alloc i_mutex and osb->osb_lock to change
356 * local_alloc_bits. Reads can be done under either lock.
357 */
358 unsigned int local_alloc_bits;
359 unsigned int local_alloc_default_bits;
360 /* osb_clusters_at_boot can become stale! Do not trust it to
361 * be up to date. */
362 unsigned int osb_clusters_at_boot;
363
364 enum ocfs2_local_alloc_state local_alloc_state; /* protected
365 * by osb_lock */
366
367 struct buffer_head *local_alloc_bh;
368
369 u64 la_last_gd;
370
371 struct ocfs2_reservation_map osb_la_resmap;
372
373 unsigned int osb_resv_level;
374 unsigned int osb_dir_resv_level;
375
376 /* Next three fields are for local node slot recovery during
377 * mount. */
378 int dirty;
379 struct ocfs2_dinode *local_alloc_copy;
380 struct ocfs2_quota_recovery *quota_rec;
381
382 struct ocfs2_blockcheck_stats osb_ecc_stats;
383 struct ocfs2_alloc_stats alloc_stats;
384 char dev_str[20]; /* "major,minor" of the device */
385
386 u8 osb_stackflags;
387
388 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
389 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
390 struct ocfs2_cluster_connection *cconn;
391 struct ocfs2_lock_res osb_super_lockres;
392 struct ocfs2_lock_res osb_rename_lockres;
393 struct ocfs2_lock_res osb_nfs_sync_lockres;
394 struct ocfs2_dlm_debug *osb_dlm_debug;
395
396 struct dentry *osb_debug_root;
397 struct dentry *osb_ctxt;
398
399 wait_queue_head_t recovery_event;
400
401 spinlock_t dc_task_lock;
402 struct task_struct *dc_task;
403 wait_queue_head_t dc_event;
404 unsigned long dc_wake_sequence;
405 unsigned long dc_work_sequence;
406
407 /*
408 * Any thread can add locks to the list, but the downconvert
409 * thread is the only one allowed to remove locks. Any change
410 * to this rule requires updating
411 * ocfs2_downconvert_thread_do_work().
412 */
413 struct list_head blocked_lock_list;
414 unsigned long blocked_lock_count;
415
416 /* List of dquot structures to drop last reference to */
417 struct llist_head dquot_drop_list;
418 struct work_struct dquot_drop_work;
419
420 wait_queue_head_t osb_mount_event;
421
422 /* Truncate log info */
423 struct inode *osb_tl_inode;
424 struct buffer_head *osb_tl_bh;
425 struct delayed_work osb_truncate_log_wq;
426 atomic_t osb_tl_disable;
427 /*
428 * How many clusters in our truncate log.
429 * It must be protected by osb_tl_inode->i_mutex.
430 */
431 unsigned int truncated_clusters;
432
433 struct ocfs2_node_map osb_recovering_orphan_dirs;
434 unsigned int *osb_orphan_wipes;
435 wait_queue_head_t osb_wipe_event;
436
437 struct ocfs2_orphan_scan osb_orphan_scan;
438
439 /* used to protect metaecc calculation check of xattr. */
440 spinlock_t osb_xattr_lock;
441
442 unsigned int osb_dx_mask;
443 u32 osb_dx_seed[4];
444
445 /* the group we used to allocate inodes. */
446 u64 osb_inode_alloc_group;
447
448 /* rb tree root for refcount lock. */
449 struct rb_root osb_rf_lock_tree;
450 struct ocfs2_refcount_tree *osb_ref_tree_lru;
451
452 struct mutex system_file_mutex;
453 };
454
455 #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
456
457 /* Useful typedef for passing around journal access functions */
458 typedef int (*ocfs2_journal_access_func)(handle_t *handle,
459 struct ocfs2_caching_info *ci,
460 struct buffer_head *bh, int type);
461
ocfs2_should_order_data(struct inode * inode)462 static inline int ocfs2_should_order_data(struct inode *inode)
463 {
464 if (!S_ISREG(inode->i_mode))
465 return 0;
466 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
467 return 0;
468 return 1;
469 }
470
ocfs2_sparse_alloc(struct ocfs2_super * osb)471 static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
472 {
473 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
474 return 1;
475 return 0;
476 }
477
ocfs2_writes_unwritten_extents(struct ocfs2_super * osb)478 static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
479 {
480 /*
481 * Support for sparse files is a pre-requisite
482 */
483 if (!ocfs2_sparse_alloc(osb))
484 return 0;
485
486 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
487 return 1;
488 return 0;
489 }
490
ocfs2_supports_inline_data(struct ocfs2_super * osb)491 static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
492 {
493 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
494 return 1;
495 return 0;
496 }
497
ocfs2_supports_xattr(struct ocfs2_super * osb)498 static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
499 {
500 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
501 return 1;
502 return 0;
503 }
504
ocfs2_meta_ecc(struct ocfs2_super * osb)505 static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
506 {
507 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
508 return 1;
509 return 0;
510 }
511
ocfs2_supports_indexed_dirs(struct ocfs2_super * osb)512 static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
513 {
514 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
515 return 1;
516 return 0;
517 }
518
ocfs2_supports_discontig_bg(struct ocfs2_super * osb)519 static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
520 {
521 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
522 return 1;
523 return 0;
524 }
525
ocfs2_link_max(struct ocfs2_super * osb)526 static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
527 {
528 if (ocfs2_supports_indexed_dirs(osb))
529 return OCFS2_DX_LINK_MAX;
530 return OCFS2_LINK_MAX;
531 }
532
ocfs2_read_links_count(struct ocfs2_dinode * di)533 static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
534 {
535 u32 nlink = le16_to_cpu(di->i_links_count);
536 u32 hi = le16_to_cpu(di->i_links_count_hi);
537
538 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
539 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
540
541 return nlink;
542 }
543
ocfs2_set_links_count(struct ocfs2_dinode * di,u32 nlink)544 static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
545 {
546 u16 lo, hi;
547
548 lo = nlink;
549 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
550
551 di->i_links_count = cpu_to_le16(lo);
552 di->i_links_count_hi = cpu_to_le16(hi);
553 }
554
ocfs2_add_links_count(struct ocfs2_dinode * di,int n)555 static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
556 {
557 u32 links = ocfs2_read_links_count(di);
558
559 links += n;
560
561 ocfs2_set_links_count(di, links);
562 }
563
ocfs2_refcount_tree(struct ocfs2_super * osb)564 static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
565 {
566 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
567 return 1;
568 return 0;
569 }
570
571 /* set / clear functions because cluster events can make these happen
572 * in parallel so we want the transitions to be atomic. this also
573 * means that any future flags osb_flags must be protected by spinlock
574 * too! */
ocfs2_set_osb_flag(struct ocfs2_super * osb,unsigned long flag)575 static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
576 unsigned long flag)
577 {
578 spin_lock(&osb->osb_lock);
579 osb->osb_flags |= flag;
580 spin_unlock(&osb->osb_lock);
581 }
582
ocfs2_set_ro_flag(struct ocfs2_super * osb,int hard)583 static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
584 int hard)
585 {
586 spin_lock(&osb->osb_lock);
587 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
588 if (hard)
589 osb->osb_flags |= OCFS2_OSB_HARD_RO;
590 else
591 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
592 spin_unlock(&osb->osb_lock);
593 }
594
ocfs2_is_hard_readonly(struct ocfs2_super * osb)595 static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
596 {
597 int ret;
598
599 spin_lock(&osb->osb_lock);
600 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
601 spin_unlock(&osb->osb_lock);
602
603 return ret;
604 }
605
ocfs2_is_soft_readonly(struct ocfs2_super * osb)606 static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
607 {
608 int ret;
609
610 spin_lock(&osb->osb_lock);
611 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
612 spin_unlock(&osb->osb_lock);
613
614 return ret;
615 }
616
ocfs2_clusterinfo_valid(struct ocfs2_super * osb)617 static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
618 {
619 return (osb->s_feature_incompat &
620 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
621 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
622 }
623
ocfs2_userspace_stack(struct ocfs2_super * osb)624 static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
625 {
626 if (ocfs2_clusterinfo_valid(osb) &&
627 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
628 OCFS2_STACK_LABEL_LEN))
629 return 1;
630 return 0;
631 }
632
ocfs2_o2cb_stack(struct ocfs2_super * osb)633 static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
634 {
635 if (ocfs2_clusterinfo_valid(osb) &&
636 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
637 OCFS2_STACK_LABEL_LEN))
638 return 1;
639 return 0;
640 }
641
ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super * osb)642 static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
643 {
644 return ocfs2_o2cb_stack(osb) &&
645 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
646 }
647
ocfs2_mount_local(struct ocfs2_super * osb)648 static inline int ocfs2_mount_local(struct ocfs2_super *osb)
649 {
650 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
651 }
652
ocfs2_uses_extended_slot_map(struct ocfs2_super * osb)653 static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
654 {
655 return (osb->s_feature_incompat &
656 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
657 }
658
659
660 #define OCFS2_IS_VALID_DINODE(ptr) \
661 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
662
663 #define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
664 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
665
666 #define OCFS2_IS_VALID_GROUP_DESC(ptr) \
667 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
668
669
670 #define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
671 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
672
673 #define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
674 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
675
676 #define OCFS2_IS_VALID_DX_ROOT(ptr) \
677 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
678
679 #define OCFS2_IS_VALID_DX_LEAF(ptr) \
680 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
681
682 #define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
683 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
684
ino_from_blkno(struct super_block * sb,u64 blkno)685 static inline unsigned long ino_from_blkno(struct super_block *sb,
686 u64 blkno)
687 {
688 return (unsigned long)(blkno & (u64)ULONG_MAX);
689 }
690
ocfs2_clusters_to_blocks(struct super_block * sb,u32 clusters)691 static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
692 u32 clusters)
693 {
694 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
695 sb->s_blocksize_bits;
696
697 return (u64)clusters << c_to_b_bits;
698 }
699
ocfs2_blocks_to_clusters(struct super_block * sb,u64 blocks)700 static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
701 u64 blocks)
702 {
703 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
704 sb->s_blocksize_bits;
705
706 return (u32)(blocks >> b_to_c_bits);
707 }
708
ocfs2_clusters_for_bytes(struct super_block * sb,u64 bytes)709 static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
710 u64 bytes)
711 {
712 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
713 unsigned int clusters;
714
715 bytes += OCFS2_SB(sb)->s_clustersize - 1;
716 /* OCFS2 just cannot have enough clusters to overflow this */
717 clusters = (unsigned int)(bytes >> cl_bits);
718
719 return clusters;
720 }
721
ocfs2_blocks_for_bytes(struct super_block * sb,u64 bytes)722 static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
723 u64 bytes)
724 {
725 bytes += sb->s_blocksize - 1;
726 return bytes >> sb->s_blocksize_bits;
727 }
728
ocfs2_clusters_to_bytes(struct super_block * sb,u32 clusters)729 static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
730 u32 clusters)
731 {
732 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
733 }
734
ocfs2_block_to_cluster_start(struct super_block * sb,u64 blocks)735 static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
736 u64 blocks)
737 {
738 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
739 unsigned int clusters;
740
741 clusters = ocfs2_blocks_to_clusters(sb, blocks);
742 return (u64)clusters << bits;
743 }
744
ocfs2_align_bytes_to_clusters(struct super_block * sb,u64 bytes)745 static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
746 u64 bytes)
747 {
748 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
749 unsigned int clusters;
750
751 clusters = ocfs2_clusters_for_bytes(sb, bytes);
752 return (u64)clusters << cl_bits;
753 }
754
ocfs2_align_bytes_to_blocks(struct super_block * sb,u64 bytes)755 static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
756 u64 bytes)
757 {
758 u64 blocks;
759
760 blocks = ocfs2_blocks_for_bytes(sb, bytes);
761 return blocks << sb->s_blocksize_bits;
762 }
763
ocfs2_align_bytes_to_sectors(u64 bytes)764 static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
765 {
766 return (unsigned long)((bytes + 511) >> 9);
767 }
768
ocfs2_page_index_to_clusters(struct super_block * sb,unsigned long pg_index)769 static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
770 unsigned long pg_index)
771 {
772 u32 clusters = pg_index;
773 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
774
775 if (unlikely(PAGE_CACHE_SHIFT > cbits))
776 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
777 else if (PAGE_CACHE_SHIFT < cbits)
778 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
779
780 return clusters;
781 }
782
783 /*
784 * Find the 1st page index which covers the given clusters.
785 */
ocfs2_align_clusters_to_page_index(struct super_block * sb,u32 clusters)786 static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
787 u32 clusters)
788 {
789 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
790 pgoff_t index = clusters;
791
792 if (PAGE_CACHE_SHIFT > cbits) {
793 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
794 } else if (PAGE_CACHE_SHIFT < cbits) {
795 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
796 }
797
798 return index;
799 }
800
ocfs2_pages_per_cluster(struct super_block * sb)801 static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
802 {
803 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
804 unsigned int pages_per_cluster = 1;
805
806 if (PAGE_CACHE_SHIFT < cbits)
807 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
808
809 return pages_per_cluster;
810 }
811
ocfs2_megabytes_to_clusters(struct super_block * sb,unsigned int megs)812 static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
813 unsigned int megs)
814 {
815 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
816
817 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
818 }
819
ocfs2_clusters_to_megabytes(struct super_block * sb,unsigned int clusters)820 static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
821 unsigned int clusters)
822 {
823 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
824 }
825
_ocfs2_set_bit(unsigned int bit,unsigned long * bitmap)826 static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
827 {
828 __set_bit_le(bit, bitmap);
829 }
830 #define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
831
_ocfs2_clear_bit(unsigned int bit,unsigned long * bitmap)832 static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
833 {
834 __clear_bit_le(bit, bitmap);
835 }
836 #define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
837
838 #define ocfs2_test_bit test_bit_le
839 #define ocfs2_find_next_zero_bit find_next_zero_bit_le
840 #define ocfs2_find_next_bit find_next_bit_le
841
correct_addr_and_bit_unaligned(int * bit,void * addr)842 static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
843 {
844 #if BITS_PER_LONG == 64
845 *bit += ((unsigned long) addr & 7UL) << 3;
846 addr = (void *) ((unsigned long) addr & ~7UL);
847 #elif BITS_PER_LONG == 32
848 *bit += ((unsigned long) addr & 3UL) << 3;
849 addr = (void *) ((unsigned long) addr & ~3UL);
850 #else
851 #error "how many bits you are?!"
852 #endif
853 return addr;
854 }
855
ocfs2_set_bit_unaligned(int bit,void * bitmap)856 static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
857 {
858 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
859 ocfs2_set_bit(bit, bitmap);
860 }
861
ocfs2_clear_bit_unaligned(int bit,void * bitmap)862 static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
863 {
864 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
865 ocfs2_clear_bit(bit, bitmap);
866 }
867
ocfs2_test_bit_unaligned(int bit,void * bitmap)868 static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
869 {
870 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
871 return ocfs2_test_bit(bit, bitmap);
872 }
873
ocfs2_find_next_zero_bit_unaligned(void * bitmap,int max,int start)874 static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
875 int start)
876 {
877 int fix = 0, ret, tmpmax;
878 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
879 tmpmax = max + fix;
880 start += fix;
881
882 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
883 if (ret > max)
884 return max;
885 return ret;
886 }
887
888 #endif /* OCFS2_H */
889
890