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ccd979bd
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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>
e3a767b6 33#include <linux/llist.h>
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MF
34#include <linux/rbtree.h>
35#include <linux/workqueue.h>
36#include <linux/kref.h>
c74ec2f7 37#include <linux/mutex.h>
cb25797d 38#include <linux/lockdep.h>
7aee47b0 39#include <linux/jbd2.h>
ccd979bd 40
8f2c9c1b
JB
41/* For union ocfs2_dlm_lksb */
42#include "stackglue.h"
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MF
43
44#include "ocfs2_fs.h"
ccd979bd 45#include "ocfs2_lockid.h"
9df5778e 46#include "ocfs2_ioctl.h"
ccd979bd 47
73be192b
JB
48/* For struct ocfs2_blockcheck_stats */
49#include "blockcheck.h"
50
d02f00cc 51#include "reservations.h"
47460d65 52
5f483c4a
GH
53#include "filecheck.h"
54
47460d65
JB
55/* Caching of metadata buffers */
56
ccd979bd
MF
57/* Most user visible OCFS2 inodes will have very few pieces of
58 * metadata, but larger files (including bitmaps, etc) must be taken
59 * into account when designing an access scheme. We allow a small
60 * amount of inlined blocks to be stored on an array and grow the
61 * structure into a rb tree when necessary. */
47460d65
JB
62#define OCFS2_CACHE_INFO_MAX_ARRAY 2
63
64/* Flags for ocfs2_caching_info */
65
66enum ocfs2_caching_info_flags {
67 /* Indicates that the metadata cache is using the inline array */
68 OCFS2_CACHE_FL_INLINE = 1<<1,
69};
ccd979bd 70
6e5a3d75 71struct ocfs2_caching_operations;
ccd979bd 72struct ocfs2_caching_info {
47460d65
JB
73 /*
74 * The parent structure provides the locks, but because the
6e5a3d75
JB
75 * parent structure can differ, it provides locking operations
76 * to struct ocfs2_caching_info.
47460d65 77 */
6e5a3d75 78 const struct ocfs2_caching_operations *ci_ops;
47460d65 79
292dd27e
JB
80 /* next two are protected by trans_inc_lock */
81 /* which transaction were we created on? Zero if none. */
82 unsigned long ci_created_trans;
66fb345d
JB
83 /* last transaction we were a part of. */
84 unsigned long ci_last_trans;
85
86 /* Cache structures */
47460d65 87 unsigned int ci_flags;
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88 unsigned int ci_num_cached;
89 union {
47460d65 90 sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
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91 struct rb_root ci_tree;
92 } ci_cache;
93};
0cf2f763
JB
94/*
95 * Need this prototype here instead of in uptodate.h because journal.h
96 * uses it.
97 */
98struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);
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99
100/* this limits us to 256 nodes
101 * if we need more, we can do a kmalloc for the map */
102#define OCFS2_NODE_MAP_MAX_NODES 256
103struct ocfs2_node_map {
104 u16 num_nodes;
105 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
106};
107
108enum ocfs2_ast_action {
109 OCFS2_AST_INVALID = 0,
110 OCFS2_AST_ATTACH,
111 OCFS2_AST_CONVERT,
112 OCFS2_AST_DOWNCONVERT,
113};
114
115/* actions for an unlockast function to take. */
116enum ocfs2_unlock_action {
117 OCFS2_UNLOCK_INVALID = 0,
118 OCFS2_UNLOCK_CANCEL_CONVERT,
119 OCFS2_UNLOCK_DROP_LOCK,
120};
121
122/* ocfs2_lock_res->l_flags flags. */
3b5da018 123#define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized
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124 * the lvb */
125#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
126 * dlm_lock */
127#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
128 * downconvert*/
129#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
130#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
131#define OCFS2_LOCK_REFRESHING (0x00000020)
132#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
133 * for shutdown paths */
134#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
135 * when to skip queueing
136 * a lock because it's
137 * about to be
138 * dropped. */
139#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
cf8e06f1 140#define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
de551246
JB
141#define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
142 call to dlm_lock. Only
143 exists with BUSY set. */
a1912826
SM
144#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread
145 * from downconverting
146 * before the upconvert
147 * has completed */
ccd979bd 148
d1e78238
X
149#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
150 * lock has already
151 * returned, do not block
152 * dc thread from
153 * downconverting */
154
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155struct ocfs2_lock_res_ops;
156
157typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
158
5bc970e8
SM
159#ifdef CONFIG_OCFS2_FS_STATS
160struct ocfs2_lock_stats {
161 u64 ls_total; /* Total wait in NSEC */
162 u32 ls_gets; /* Num acquires */
163 u32 ls_fail; /* Num failed acquires */
164
165 /* Storing max wait in usecs saves 24 bytes per inode */
166 u32 ls_max; /* Max wait in USEC */
167};
168#endif
169
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170struct ocfs2_lock_res {
171 void *l_priv;
172 struct ocfs2_lock_res_ops *l_ops;
83fd9c7f 173
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174
175 struct list_head l_blocked_list;
176 struct list_head l_mask_waiters;
439a36b8 177 struct list_head l_holders;
ccd979bd 178
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179 unsigned long l_flags;
180 char l_name[OCFS2_LOCK_ID_MAX_LEN];
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MF
181 unsigned int l_ro_holders;
182 unsigned int l_ex_holders;
a2a2f552
MM
183 signed char l_level;
184 signed char l_requested;
185 signed char l_blocking;
83fd9c7f
GR
186
187 /* Data packed - type enum ocfs2_lock_type */
188 unsigned char l_type;
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189
190 /* used from AST/BAST funcs. */
83fd9c7f
GR
191 /* Data packed - enum type ocfs2_ast_action */
192 unsigned char l_action;
193 /* Data packed - enum type ocfs2_unlock_action */
194 unsigned char l_unlock_action;
de551246 195 unsigned int l_pending_gen;
ccd979bd 196
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GR
197 spinlock_t l_lock;
198
199 struct ocfs2_dlm_lksb l_lksb;
200
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201 wait_queue_head_t l_event;
202
203 struct list_head l_debug_list;
8ddb7b00
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204
205#ifdef CONFIG_OCFS2_FS_STATS
5bc970e8
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206 struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */
207 u32 l_lock_refresh; /* Disk refreshes */
208 struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */
8ddb7b00 209#endif
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210#ifdef CONFIG_DEBUG_LOCK_ALLOC
211 struct lockdep_map l_lockdep_map;
212#endif
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213};
214
ed460cff
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215enum ocfs2_orphan_reco_type {
216 ORPHAN_NO_NEED_TRUNCATE = 0,
217 ORPHAN_NEED_TRUNCATE,
218};
219
692684e1
SM
220enum ocfs2_orphan_scan_state {
221 ORPHAN_SCAN_ACTIVE,
222 ORPHAN_SCAN_INACTIVE
223};
224
83273932
SE
225struct ocfs2_orphan_scan {
226 struct mutex os_lock;
227 struct ocfs2_super *os_osb;
228 struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
229 struct delayed_work os_orphan_scan_work;
395627b0 230 time64_t os_scantime; /* time this node ran the scan */
15633a22
SE
231 u32 os_count; /* tracks node specific scans */
232 u32 os_seqno; /* tracks cluster wide scans */
692684e1 233 atomic_t os_state; /* ACTIVE or INACTIVE */
83273932
SE
234};
235
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236struct ocfs2_dlm_debug {
237 struct kref d_refcnt;
238 struct dentry *d_locking_state;
239 struct list_head d_lockres_tracking;
240};
241
242enum ocfs2_vol_state
243{
244 VOLUME_INIT = 0,
245 VOLUME_MOUNTED,
19ece546 246 VOLUME_MOUNTED_QUOTAS,
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MF
247 VOLUME_DISMOUNTED,
248 VOLUME_DISABLED
249};
250
251struct ocfs2_alloc_stats
252{
253 atomic_t moves;
254 atomic_t local_data;
255 atomic_t bitmap_data;
256 atomic_t bg_allocs;
257 atomic_t bg_extends;
258};
259
260enum ocfs2_local_alloc_state
261{
9c7af40b
MF
262 OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for
263 * this mountpoint. */
264 OCFS2_LA_ENABLED, /* Local alloc is in use. */
265 OCFS2_LA_THROTTLED, /* Local alloc is in use, but number
266 * of bits has been reduced. */
267 OCFS2_LA_DISABLED /* Local alloc has temporarily been
268 * disabled. */
ccd979bd
MF
269};
270
271enum ocfs2_mount_options
272{
2c442719 273 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */
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MF
274 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
275 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
276 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
277 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
53fc622b 278 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
cf1d6c76 279 OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
12462f1d 280 OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */
5297aad8
JK
281 OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */
282 OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access
283 control lists */
284 OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */
285 OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */
fc371891
JB
286 OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT
287 writes */
288 OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */
289 OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */
1dfeb768 290
291 OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
7d0fb914
GR
292 OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */
293 OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */
ccd979bd
MF
294};
295
8ed6b237
GR
296#define OCFS2_OSB_SOFT_RO 0x0001
297#define OCFS2_OSB_HARD_RO 0x0002
298#define OCFS2_OSB_ERROR_FS 0x0004
299#define OCFS2_DEFAULT_ATIME_QUANTUM 60
ccd979bd
MF
300
301struct ocfs2_journal;
d85b20e4 302struct ocfs2_slot_info;
553abd04 303struct ocfs2_recovery_map;
9140db04 304struct ocfs2_replay_map;
2205363d 305struct ocfs2_quota_recovery;
ccd979bd
MF
306struct ocfs2_super
307{
ccd979bd
MF
308 struct task_struct *commit_task;
309 struct super_block *sb;
310 struct inode *root_inode;
311 struct inode *sys_root_inode;
b4d693fc
TM
312 struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES];
313 struct inode **local_system_inodes;
ccd979bd
MF
314
315 struct ocfs2_slot_info *slot_info;
316
539d8264
SM
317 u32 *slot_recovery_generations;
318
ccd979bd 319 spinlock_t node_map_lock;
ccd979bd 320
ccd979bd
MF
321 u64 root_blkno;
322 u64 system_dir_blkno;
323 u64 bitmap_blkno;
324 u32 bitmap_cpg;
ccd979bd 325 char *uuid_str;
cf1d6c76 326 u32 uuid_hash;
ccd979bd
MF
327 u8 *vol_label;
328 u64 first_cluster_group_blkno;
329 u32 fs_generation;
330
331 u32 s_feature_compat;
332 u32 s_feature_incompat;
333 u32 s_feature_ro_compat;
334
4d0ddb2c
TM
335 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
336 * Could protect more on osb as it's very short lived.
337 */
ccd979bd
MF
338 spinlock_t osb_lock;
339 u32 s_next_generation;
340 unsigned long osb_flags;
4d0ddb2c 341 s16 s_inode_steal_slot;
b89c5428 342 s16 s_meta_steal_slot;
4d0ddb2c 343 atomic_t s_num_inodes_stolen;
b89c5428 344 atomic_t s_num_meta_stolen;
ccd979bd
MF
345
346 unsigned long s_mount_opt;
7f1a37e3 347 unsigned int s_atime_quantum;
ccd979bd 348
fc881fa0 349 unsigned int max_slots;
19fdb624 350 unsigned int node_num;
fc881fa0
JB
351 int slot_num;
352 int preferred_slot;
ccd979bd
MF
353 int s_sectsize_bits;
354 int s_clustersize;
355 int s_clustersize_bits;
fdd77704 356 unsigned int s_xattr_inline_size;
ccd979bd
MF
357
358 atomic_t vol_state;
c74ec2f7 359 struct mutex recovery_lock;
553abd04 360 struct ocfs2_recovery_map *recovery_map;
9140db04 361 struct ocfs2_replay_map *replay_map;
ccd979bd
MF
362 struct task_struct *recovery_thread_task;
363 int disable_recovery;
364 wait_queue_head_t checkpoint_event;
ccd979bd 365 struct ocfs2_journal *journal;
d147b3d6 366 unsigned long osb_commit_interval;
ccd979bd 367
9c7af40b
MF
368 struct delayed_work la_enable_wq;
369
370 /*
371 * Must hold local alloc i_mutex and osb->osb_lock to change
372 * local_alloc_bits. Reads can be done under either lock.
373 */
ebcee4b5 374 unsigned int local_alloc_bits;
9c7af40b 375 unsigned int local_alloc_default_bits;
6b82021b
MF
376 /* osb_clusters_at_boot can become stale! Do not trust it to
377 * be up to date. */
378 unsigned int osb_clusters_at_boot;
9c7af40b
MF
379
380 enum ocfs2_local_alloc_state local_alloc_state; /* protected
381 * by osb_lock */
382
ccd979bd 383 struct buffer_head *local_alloc_bh;
9c7af40b 384
883d4cae 385 u64 la_last_gd;
ccd979bd 386
d02f00cc
MF
387 struct ocfs2_reservation_map osb_la_resmap;
388
389 unsigned int osb_resv_level;
83f92318 390 unsigned int osb_dir_resv_level;
d02f00cc 391
964f14a0 392 /* Next two fields are for local node slot recovery during
ccd979bd 393 * mount. */
ccd979bd 394 struct ocfs2_dinode *local_alloc_copy;
2205363d 395 struct ocfs2_quota_recovery *quota_rec;
ccd979bd 396
73be192b 397 struct ocfs2_blockcheck_stats osb_ecc_stats;
ccd979bd
MF
398 struct ocfs2_alloc_stats alloc_stats;
399 char dev_str[20]; /* "major,minor" of the device */
400
98f486f2
SM
401 u8 osb_stackflags;
402
b61817e1 403 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
c74a3bdd 404 char osb_cluster_name[OCFS2_CLUSTER_NAME_LEN + 1];
4670c46d 405 struct ocfs2_cluster_connection *cconn;
ccd979bd
MF
406 struct ocfs2_lock_res osb_super_lockres;
407 struct ocfs2_lock_res osb_rename_lockres;
6ca497a8 408 struct ocfs2_lock_res osb_nfs_sync_lockres;
4882abeb 409 struct ocfs2_lock_res osb_trim_fs_lockres;
5500ab4e 410 struct mutex obs_trim_fs_mutex;
ccd979bd
MF
411 struct ocfs2_dlm_debug *osb_dlm_debug;
412
413 struct dentry *osb_debug_root;
50397507 414 struct dentry *osb_ctxt;
ccd979bd
MF
415
416 wait_queue_head_t recovery_event;
417
34d024f8
MF
418 spinlock_t dc_task_lock;
419 struct task_struct *dc_task;
420 wait_queue_head_t dc_event;
421 unsigned long dc_wake_sequence;
422 unsigned long dc_work_sequence;
ccd979bd 423
7ec373cf
MF
424 /*
425 * Any thread can add locks to the list, but the downconvert
426 * thread is the only one allowed to remove locks. Any change
427 * to this rule requires updating
428 * ocfs2_downconvert_thread_do_work().
429 */
ccd979bd
MF
430 struct list_head blocked_lock_list;
431 unsigned long blocked_lock_count;
432
e3a767b6
JK
433 /* List of dquot structures to drop last reference to */
434 struct llist_head dquot_drop_list;
435 struct work_struct dquot_drop_work;
436
ccd979bd
MF
437 wait_queue_head_t osb_mount_event;
438
439 /* Truncate log info */
440 struct inode *osb_tl_inode;
441 struct buffer_head *osb_tl_bh;
c4028958 442 struct delayed_work osb_truncate_log_wq;
a9e9acae 443 atomic_t osb_tl_disable;
50308d81
TM
444 /*
445 * How many clusters in our truncate log.
446 * It must be protected by osb_tl_inode->i_mutex.
447 */
448 unsigned int truncated_clusters;
b4df6ed8
MF
449
450 struct ocfs2_node_map osb_recovering_orphan_dirs;
451 unsigned int *osb_orphan_wipes;
452 wait_queue_head_t osb_wipe_event;
c8b9cf9a 453
83273932
SE
454 struct ocfs2_orphan_scan osb_orphan_scan;
455
c8b9cf9a
TM
456 /* used to protect metaecc calculation check of xattr. */
457 spinlock_t osb_xattr_lock;
9b7895ef
MF
458
459 unsigned int osb_dx_mask;
460 u32 osb_dx_seed[4];
feb473a6
TM
461
462 /* the group we used to allocate inodes. */
463 u64 osb_inode_alloc_group;
374a263e
TM
464
465 /* rb tree root for refcount lock. */
466 struct rb_root osb_rf_lock_tree;
467 struct ocfs2_refcount_tree *osb_ref_tree_lru;
43b10a20 468
469 struct mutex system_file_mutex;
35ddf78e 470
471 /*
472 * OCFS2 needs to schedule several different types of work which
473 * require cluster locking, disk I/O, recovery waits, etc. Since these
474 * types of work tend to be heavy we avoid using the kernel events
475 * workqueue and schedule on our own.
476 */
477 struct workqueue_struct *ocfs2_wq;
5f483c4a
GH
478
479 /* sysfs directory per partition */
480 struct kset *osb_dev_kset;
481
482 /* file check related stuff */
483 struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
ccd979bd
MF
484};
485
486#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
ccd979bd 487
13723d00 488/* Useful typedef for passing around journal access functions */
0cf2f763
JB
489typedef int (*ocfs2_journal_access_func)(handle_t *handle,
490 struct ocfs2_caching_info *ci,
13723d00
JB
491 struct buffer_head *bh, int type);
492
ccd979bd
MF
493static inline int ocfs2_should_order_data(struct inode *inode)
494{
495 if (!S_ISREG(inode->i_mode))
496 return 0;
497 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
498 return 0;
499 return 1;
500}
501
dcd0538f
MF
502static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
503{
504 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
505 return 1;
506 return 0;
507}
508
328d5752
MF
509static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
510{
511 /*
512 * Support for sparse files is a pre-requisite
513 */
514 if (!ocfs2_sparse_alloc(osb))
515 return 0;
516
517 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
518 return 1;
519 return 0;
520}
521
160cc266
JQ
522static inline int ocfs2_supports_append_dio(struct ocfs2_super *osb)
523{
18d585f0 524 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
160cc266
JQ
525 return 1;
526 return 0;
527}
528
529
15b1e36b
MF
530static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
531{
532 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
533 return 1;
534 return 0;
535}
536
8154da3d
TY
537static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
538{
539 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
540 return 1;
541 return 0;
542}
543
70ad1ba7
JB
544static inline int ocfs2_meta_ecc(struct ocfs2_super *osb)
545{
546 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC)
547 return 1;
548 return 0;
549}
550
9b7895ef
MF
551static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb)
552{
553 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
554 return 1;
555 return 0;
556}
557
4711954e 558static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb)
798db35f
JB
559{
560 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
561 return 1;
562 return 0;
563}
564
198a1ca3
MF
565static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb)
566{
567 if (ocfs2_supports_indexed_dirs(osb))
568 return OCFS2_DX_LINK_MAX;
569 return OCFS2_LINK_MAX;
570}
571
572static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
573{
574 u32 nlink = le16_to_cpu(di->i_links_count);
575 u32 hi = le16_to_cpu(di->i_links_count_hi);
576
577 if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
578 nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
579
580 return nlink;
581}
582
583static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink)
584{
585 u16 lo, hi;
586
587 lo = nlink;
588 hi = nlink >> OCFS2_LINKS_HI_SHIFT;
589
590 di->i_links_count = cpu_to_le16(lo);
591 di->i_links_count_hi = cpu_to_le16(hi);
592}
593
594static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n)
595{
596 u32 links = ocfs2_read_links_count(di);
597
598 links += n;
599
600 ocfs2_set_links_count(di, links);
601}
602
1aa75fea
TM
603static inline int ocfs2_refcount_tree(struct ocfs2_super *osb)
604{
605 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE)
606 return 1;
607 return 0;
608}
609
ccd979bd
MF
610/* set / clear functions because cluster events can make these happen
611 * in parallel so we want the transitions to be atomic. this also
612 * means that any future flags osb_flags must be protected by spinlock
613 * too! */
614static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
615 unsigned long flag)
616{
617 spin_lock(&osb->osb_lock);
618 osb->osb_flags |= flag;
619 spin_unlock(&osb->osb_lock);
620}
621
622static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
623 int hard)
624{
625 spin_lock(&osb->osb_lock);
626 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
627 if (hard)
628 osb->osb_flags |= OCFS2_OSB_HARD_RO;
629 else
630 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
631 spin_unlock(&osb->osb_lock);
632}
633
634static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
635{
636 int ret;
637
638 spin_lock(&osb->osb_lock);
639 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
640 spin_unlock(&osb->osb_lock);
641
642 return ret;
643}
644
645static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
646{
647 int ret;
648
649 spin_lock(&osb->osb_lock);
650 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
651 spin_unlock(&osb->osb_lock);
652
653 return ret;
654}
655
98f486f2 656static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
b61817e1
JB
657{
658 return (osb->s_feature_incompat &
98f486f2
SM
659 (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
660 OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
661}
662
663static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
664{
665 if (ocfs2_clusterinfo_valid(osb) &&
666 memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
667 OCFS2_STACK_LABEL_LEN))
668 return 1;
669 return 0;
670}
671
672static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
673{
674 if (ocfs2_clusterinfo_valid(osb) &&
675 !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
676 OCFS2_STACK_LABEL_LEN))
677 return 1;
678 return 0;
679}
680
681static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
682{
683 return ocfs2_o2cb_stack(osb) &&
684 (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
b61817e1
JB
685}
686
c271c5c2
SM
687static inline int ocfs2_mount_local(struct ocfs2_super *osb)
688{
689 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
690}
691
386a2ef8
JB
692static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
693{
694 return (osb->s_feature_incompat &
695 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
696}
697
698
ccd979bd
MF
699#define OCFS2_IS_VALID_DINODE(ptr) \
700 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
701
ccd979bd
MF
702#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
703 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
704
ccd979bd
MF
705#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
706 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
707
ccd979bd 708
f6087fb7
JB
709#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
710 (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
711
87d35a74
MF
712#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \
713 (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE))
714
9b7895ef
MF
715#define OCFS2_IS_VALID_DX_ROOT(ptr) \
716 (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE))
717
718#define OCFS2_IS_VALID_DX_LEAF(ptr) \
719 (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
720
f2c870e3
TM
721#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
722 (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
723
ccd979bd
MF
724static inline unsigned long ino_from_blkno(struct super_block *sb,
725 u64 blkno)
726{
727 return (unsigned long)(blkno & (u64)ULONG_MAX);
728}
729
730static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
731 u32 clusters)
732{
733 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
734 sb->s_blocksize_bits;
735
736 return (u64)clusters << c_to_b_bits;
737}
738
ae1f0814
JQ
739static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
740 u64 blocks)
741{
742 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
743 sb->s_blocksize_bits;
744
745 blocks += (1 << b_to_c_bits) - 1;
746 return (u32)(blocks >> b_to_c_bits);
747}
748
ccd979bd
MF
749static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
750 u64 blocks)
751{
752 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
753 sb->s_blocksize_bits;
754
755 return (u32)(blocks >> b_to_c_bits);
756}
757
758static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
759 u64 bytes)
760{
761 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
762 unsigned int clusters;
763
764 bytes += OCFS2_SB(sb)->s_clustersize - 1;
765 /* OCFS2 just cannot have enough clusters to overflow this */
766 clusters = (unsigned int)(bytes >> cl_bits);
767
768 return clusters;
769}
770
24c40b32
JQ
771static inline unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
772 u64 bytes)
773{
774 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
775 unsigned int clusters;
776
777 clusters = (unsigned int)(bytes >> cl_bits);
778 return clusters;
779}
780
ccd979bd
MF
781static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
782 u64 bytes)
783{
784 bytes += sb->s_blocksize - 1;
785 return bytes >> sb->s_blocksize_bits;
786}
787
788static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
789 u32 clusters)
790{
791 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
792}
793
1d46dc08
MF
794static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb,
795 u64 blocks)
796{
797 int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits;
798 unsigned int clusters;
799
800 clusters = ocfs2_blocks_to_clusters(sb, blocks);
801 return (u64)clusters << bits;
802}
803
ccd979bd
MF
804static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
805 u64 bytes)
806{
807 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
808 unsigned int clusters;
809
810 clusters = ocfs2_clusters_for_bytes(sb, bytes);
811 return (u64)clusters << cl_bits;
812}
813
814static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
815 u64 bytes)
816{
817 u64 blocks;
818
819 blocks = ocfs2_blocks_for_bytes(sb, bytes);
820 return blocks << sb->s_blocksize_bits;
821}
822
823static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
824{
825 return (unsigned long)((bytes + 511) >> 9);
826}
827
9517bac6
MF
828static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
829 unsigned long pg_index)
830{
831 u32 clusters = pg_index;
832 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
833
09cbfeaf
KS
834 if (unlikely(PAGE_SHIFT > cbits))
835 clusters = pg_index << (PAGE_SHIFT - cbits);
836 else if (PAGE_SHIFT < cbits)
837 clusters = pg_index >> (cbits - PAGE_SHIFT);
9517bac6
MF
838
839 return clusters;
840}
841
842/*
843 * Find the 1st page index which covers the given clusters.
844 */
7c08d70c 845static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
9517bac6
MF
846 u32 clusters)
847{
848 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
7c08d70c 849 pgoff_t index = clusters;
9517bac6 850
09cbfeaf
KS
851 if (PAGE_SHIFT > cbits) {
852 index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
853 } else if (PAGE_SHIFT < cbits) {
854 index = (pgoff_t)clusters << (cbits - PAGE_SHIFT);
9517bac6
MF
855 }
856
857 return index;
858}
859
60b11392
MF
860static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
861{
862 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
863 unsigned int pages_per_cluster = 1;
864
09cbfeaf
KS
865 if (PAGE_SHIFT < cbits)
866 pages_per_cluster = 1 << (cbits - PAGE_SHIFT);
60b11392
MF
867
868 return pages_per_cluster;
869}
870
ebcee4b5
MF
871static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb,
872 unsigned int megs)
873{
874 BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576);
875
876 return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits);
877}
878
73c8a800
MF
879static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb,
880 unsigned int clusters)
881{
882 return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits);
883}
884
b4414eea
MF
885static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap)
886{
730e663b 887 __set_bit_le(bit, bitmap);
b4414eea
MF
888}
889#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr))
890
891static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap)
892{
730e663b 893 __clear_bit_le(bit, bitmap);
b4414eea
MF
894}
895#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr))
896
c4354d0d
AM
897#define ocfs2_test_bit test_bit_le
898#define ocfs2_find_next_zero_bit find_next_zero_bit_le
899#define ocfs2_find_next_bit find_next_bit_le
93925579
AM
900
901static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr)
902{
903#if BITS_PER_LONG == 64
904 *bit += ((unsigned long) addr & 7UL) << 3;
905 addr = (void *) ((unsigned long) addr & ~7UL);
906#elif BITS_PER_LONG == 32
907 *bit += ((unsigned long) addr & 3UL) << 3;
908 addr = (void *) ((unsigned long) addr & ~3UL);
909#else
910#error "how many bits you are?!"
911#endif
912 return addr;
913}
914
915static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap)
916{
917 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
918 ocfs2_set_bit(bit, bitmap);
919}
920
921static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap)
922{
923 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
924 ocfs2_clear_bit(bit, bitmap);
925}
926
927static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap)
928{
929 bitmap = correct_addr_and_bit_unaligned(&bit, bitmap);
930 return ocfs2_test_bit(bit, bitmap);
931}
932
933static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max,
934 int start)
935{
936 int fix = 0, ret, tmpmax;
937 bitmap = correct_addr_and_bit_unaligned(&fix, bitmap);
938 tmpmax = max + fix;
939 start += fix;
940
941 ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix;
942 if (ret > max)
943 return max;
944 return ret;
945}
946
ccd979bd
MF
947#endif /* OCFS2_H */
948