blob: 31692379c17059154640ed2bd9ed1e09b0d0ff03 [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- 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/rbtree.h>
34#include <linux/workqueue.h>
35#include <linux/kref.h>
Arjan van de Venc74ec2f2006-01-13 21:54:23 -080036#include <linux/mutex.h>
Mark Fasheh1fabe142006-10-09 18:11:45 -070037#include <linux/jbd.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080038
Joel Becker8f2c9c12008-02-01 12:16:57 -080039/* For union ocfs2_dlm_lksb */
40#include "stackglue.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080041
42#include "ocfs2_fs.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080043#include "ocfs2_lockid.h"
44
Mark Fashehccd979b2005-12-15 14:31:24 -080045/* Most user visible OCFS2 inodes will have very few pieces of
46 * metadata, but larger files (including bitmaps, etc) must be taken
47 * into account when designing an access scheme. We allow a small
48 * amount of inlined blocks to be stored on an array and grow the
49 * structure into a rb tree when necessary. */
50#define OCFS2_INODE_MAX_CACHE_ARRAY 2
51
52struct ocfs2_caching_info {
53 unsigned int ci_num_cached;
54 union {
55 sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY];
56 struct rb_root ci_tree;
57 } ci_cache;
58};
59
60/* this limits us to 256 nodes
61 * if we need more, we can do a kmalloc for the map */
62#define OCFS2_NODE_MAP_MAX_NODES 256
63struct ocfs2_node_map {
64 u16 num_nodes;
65 unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)];
66};
67
68enum ocfs2_ast_action {
69 OCFS2_AST_INVALID = 0,
70 OCFS2_AST_ATTACH,
71 OCFS2_AST_CONVERT,
72 OCFS2_AST_DOWNCONVERT,
73};
74
75/* actions for an unlockast function to take. */
76enum ocfs2_unlock_action {
77 OCFS2_UNLOCK_INVALID = 0,
78 OCFS2_UNLOCK_CANCEL_CONVERT,
79 OCFS2_UNLOCK_DROP_LOCK,
80};
81
82/* ocfs2_lock_res->l_flags flags. */
83#define OCFS2_LOCK_ATTACHED (0x00000001) /* have we initialized
84 * the lvb */
85#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in
86 * dlm_lock */
87#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to
88 * downconvert*/
89#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */
90#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010)
91#define OCFS2_LOCK_REFRESHING (0x00000020)
92#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization
93 * for shutdown paths */
94#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track
95 * when to skip queueing
96 * a lock because it's
97 * about to be
98 * dropped. */
99#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */
Mark Fashehcf8e06f2007-12-20 16:43:10 -0800100#define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */
Joel Beckerde551242008-02-01 14:45:08 -0800101#define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a
102 call to dlm_lock. Only
103 exists with BUSY set. */
Mark Fashehccd979b2005-12-15 14:31:24 -0800104
105struct ocfs2_lock_res_ops;
106
107typedef void (*ocfs2_lock_callback)(int status, unsigned long data);
108
109struct ocfs2_lock_res {
110 void *l_priv;
111 struct ocfs2_lock_res_ops *l_ops;
112 spinlock_t l_lock;
113
114 struct list_head l_blocked_list;
115 struct list_head l_mask_waiters;
116
117 enum ocfs2_lock_type l_type;
118 unsigned long l_flags;
119 char l_name[OCFS2_LOCK_ID_MAX_LEN];
120 int l_level;
121 unsigned int l_ro_holders;
122 unsigned int l_ex_holders;
Joel Becker8f2c9c12008-02-01 12:16:57 -0800123 union ocfs2_dlm_lksb l_lksb;
Mark Fashehccd979b2005-12-15 14:31:24 -0800124
125 /* used from AST/BAST funcs. */
126 enum ocfs2_ast_action l_action;
127 enum ocfs2_unlock_action l_unlock_action;
128 int l_requested;
129 int l_blocking;
Joel Beckerde551242008-02-01 14:45:08 -0800130 unsigned int l_pending_gen;
Mark Fashehccd979b2005-12-15 14:31:24 -0800131
132 wait_queue_head_t l_event;
133
134 struct list_head l_debug_list;
135};
136
137struct ocfs2_dlm_debug {
138 struct kref d_refcnt;
139 struct dentry *d_locking_state;
140 struct list_head d_lockres_tracking;
141};
142
143enum ocfs2_vol_state
144{
145 VOLUME_INIT = 0,
146 VOLUME_MOUNTED,
147 VOLUME_DISMOUNTED,
148 VOLUME_DISABLED
149};
150
151struct ocfs2_alloc_stats
152{
153 atomic_t moves;
154 atomic_t local_data;
155 atomic_t bitmap_data;
156 atomic_t bg_allocs;
157 atomic_t bg_extends;
158};
159
160enum ocfs2_local_alloc_state
161{
162 OCFS2_LA_UNUSED = 0,
163 OCFS2_LA_ENABLED,
164 OCFS2_LA_DISABLED
165};
166
167enum ocfs2_mount_options
168{
169 OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Heartbeat started in local mode */
170 OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */
171 OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */
172 OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
173 OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
Mark Fasheh53fc6222007-12-20 16:49:04 -0800174 OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
Mark Fashehccd979b2005-12-15 14:31:24 -0800175};
176
177#define OCFS2_OSB_SOFT_RO 0x0001
178#define OCFS2_OSB_HARD_RO 0x0002
179#define OCFS2_OSB_ERROR_FS 0x0004
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800180#define OCFS2_DEFAULT_ATIME_QUANTUM 60
Mark Fashehccd979b2005-12-15 14:31:24 -0800181
182struct ocfs2_journal;
Joel Beckerd85b20e2008-02-01 12:01:05 -0800183struct ocfs2_slot_info;
Joel Becker553abd02008-02-01 12:03:57 -0800184struct ocfs2_recovery_map;
Mark Fashehccd979b2005-12-15 14:31:24 -0800185struct ocfs2_super
186{
Mark Fashehccd979b2005-12-15 14:31:24 -0800187 struct task_struct *commit_task;
188 struct super_block *sb;
189 struct inode *root_inode;
190 struct inode *sys_root_inode;
191 struct inode *system_inodes[NUM_SYSTEM_INODES];
192
193 struct ocfs2_slot_info *slot_info;
194
195 spinlock_t node_map_lock;
Mark Fashehccd979b2005-12-15 14:31:24 -0800196
Mark Fashehccd979b2005-12-15 14:31:24 -0800197 u64 root_blkno;
198 u64 system_dir_blkno;
199 u64 bitmap_blkno;
200 u32 bitmap_cpg;
201 u8 *uuid;
202 char *uuid_str;
203 u8 *vol_label;
204 u64 first_cluster_group_blkno;
205 u32 fs_generation;
206
207 u32 s_feature_compat;
208 u32 s_feature_incompat;
209 u32 s_feature_ro_compat;
210
Tao Ma4d0ddb22008-03-05 16:11:46 +0800211 /* Protects s_next_generation, osb_flags and s_inode_steal_slot.
212 * Could protect more on osb as it's very short lived.
213 */
Mark Fashehccd979b2005-12-15 14:31:24 -0800214 spinlock_t osb_lock;
215 u32 s_next_generation;
216 unsigned long osb_flags;
Tao Ma4d0ddb22008-03-05 16:11:46 +0800217 s16 s_inode_steal_slot;
218 atomic_t s_num_inodes_stolen;
Mark Fashehccd979b2005-12-15 14:31:24 -0800219
220 unsigned long s_mount_opt;
Tiger Yang7f1a37e2006-11-15 15:48:42 +0800221 unsigned int s_atime_quantum;
Mark Fashehccd979b2005-12-15 14:31:24 -0800222
Joel Beckerfc881fa2008-02-01 12:04:48 -0800223 unsigned int max_slots;
Joel Becker19fdb622008-01-30 15:38:24 -0800224 unsigned int node_num;
Joel Beckerfc881fa2008-02-01 12:04:48 -0800225 int slot_num;
226 int preferred_slot;
Mark Fashehccd979b2005-12-15 14:31:24 -0800227 int s_sectsize_bits;
228 int s_clustersize;
229 int s_clustersize_bits;
Mark Fashehccd979b2005-12-15 14:31:24 -0800230
231 atomic_t vol_state;
Arjan van de Venc74ec2f2006-01-13 21:54:23 -0800232 struct mutex recovery_lock;
Joel Becker553abd02008-02-01 12:03:57 -0800233 struct ocfs2_recovery_map *recovery_map;
Mark Fashehccd979b2005-12-15 14:31:24 -0800234 struct task_struct *recovery_thread_task;
235 int disable_recovery;
236 wait_queue_head_t checkpoint_event;
237 atomic_t needs_checkpoint;
238 struct ocfs2_journal *journal;
Mark Fashehd147b3d2007-11-07 14:40:36 -0800239 unsigned long osb_commit_interval;
Mark Fashehccd979b2005-12-15 14:31:24 -0800240
Sunil Mushran2fbe8d12007-12-20 14:58:11 -0800241 int local_alloc_size;
Mark Fashehccd979b2005-12-15 14:31:24 -0800242 enum ocfs2_local_alloc_state local_alloc_state;
243 struct buffer_head *local_alloc_bh;
Mark Fasheh883d4ca2006-06-05 16:41:00 -0400244 u64 la_last_gd;
Mark Fashehccd979b2005-12-15 14:31:24 -0800245
246 /* Next two fields are for local node slot recovery during
247 * mount. */
248 int dirty;
249 struct ocfs2_dinode *local_alloc_copy;
250
251 struct ocfs2_alloc_stats alloc_stats;
252 char dev_str[20]; /* "major,minor" of the device */
253
Joel Beckerb61817e2008-02-01 15:08:23 -0800254 char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
Joel Becker4670c462008-02-01 14:39:35 -0800255 struct ocfs2_cluster_connection *cconn;
Mark Fashehccd979b2005-12-15 14:31:24 -0800256 struct ocfs2_lock_res osb_super_lockres;
257 struct ocfs2_lock_res osb_rename_lockres;
Mark Fashehccd979b2005-12-15 14:31:24 -0800258 struct ocfs2_dlm_debug *osb_dlm_debug;
259
260 struct dentry *osb_debug_root;
261
262 wait_queue_head_t recovery_event;
263
Mark Fasheh34d024f2007-09-24 15:56:19 -0700264 spinlock_t dc_task_lock;
265 struct task_struct *dc_task;
266 wait_queue_head_t dc_event;
267 unsigned long dc_wake_sequence;
268 unsigned long dc_work_sequence;
Mark Fashehccd979b2005-12-15 14:31:24 -0800269
Mark Fasheh7ec373c2008-01-23 16:54:48 -0800270 /*
271 * Any thread can add locks to the list, but the downconvert
272 * thread is the only one allowed to remove locks. Any change
273 * to this rule requires updating
274 * ocfs2_downconvert_thread_do_work().
275 */
Mark Fashehccd979b2005-12-15 14:31:24 -0800276 struct list_head blocked_lock_list;
277 unsigned long blocked_lock_count;
278
Mark Fashehccd979b2005-12-15 14:31:24 -0800279 wait_queue_head_t osb_mount_event;
280
281 /* Truncate log info */
282 struct inode *osb_tl_inode;
283 struct buffer_head *osb_tl_bh;
David Howellsc4028952006-11-22 14:57:56 +0000284 struct delayed_work osb_truncate_log_wq;
Mark Fashehb4df6ed2006-02-22 17:35:08 -0800285
286 struct ocfs2_node_map osb_recovering_orphan_dirs;
287 unsigned int *osb_orphan_wipes;
288 wait_queue_head_t osb_wipe_event;
Mark Fashehccd979b2005-12-15 14:31:24 -0800289};
290
291#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)
Mark Fashehccd979b2005-12-15 14:31:24 -0800292
293static inline int ocfs2_should_order_data(struct inode *inode)
294{
295 if (!S_ISREG(inode->i_mode))
296 return 0;
297 if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)
298 return 0;
299 return 1;
300}
301
Mark Fashehdcd05382007-01-16 11:32:23 -0800302static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
303{
304 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
305 return 1;
306 return 0;
307}
308
Mark Fasheh328d5752007-06-18 10:48:04 -0700309static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
310{
311 /*
312 * Support for sparse files is a pre-requisite
313 */
314 if (!ocfs2_sparse_alloc(osb))
315 return 0;
316
317 if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
318 return 1;
319 return 0;
320}
321
Mark Fasheh15b1e362007-09-07 13:58:15 -0700322static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb)
323{
324 if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA)
325 return 1;
326 return 0;
327}
328
Mark Fashehccd979b2005-12-15 14:31:24 -0800329/* set / clear functions because cluster events can make these happen
330 * in parallel so we want the transitions to be atomic. this also
331 * means that any future flags osb_flags must be protected by spinlock
332 * too! */
333static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb,
334 unsigned long flag)
335{
336 spin_lock(&osb->osb_lock);
337 osb->osb_flags |= flag;
338 spin_unlock(&osb->osb_lock);
339}
340
341static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb,
342 int hard)
343{
344 spin_lock(&osb->osb_lock);
345 osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO);
346 if (hard)
347 osb->osb_flags |= OCFS2_OSB_HARD_RO;
348 else
349 osb->osb_flags |= OCFS2_OSB_SOFT_RO;
350 spin_unlock(&osb->osb_lock);
351}
352
353static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb)
354{
355 int ret;
356
357 spin_lock(&osb->osb_lock);
358 ret = osb->osb_flags & OCFS2_OSB_HARD_RO;
359 spin_unlock(&osb->osb_lock);
360
361 return ret;
362}
363
364static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
365{
366 int ret;
367
368 spin_lock(&osb->osb_lock);
369 ret = osb->osb_flags & OCFS2_OSB_SOFT_RO;
370 spin_unlock(&osb->osb_lock);
371
372 return ret;
373}
374
Joel Beckerb61817e2008-02-01 15:08:23 -0800375static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
376{
377 return (osb->s_feature_incompat &
378 OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK);
379}
380
Sunil Mushranc271c5c2006-12-05 17:56:35 -0800381static inline int ocfs2_mount_local(struct ocfs2_super *osb)
382{
383 return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT);
384}
385
Joel Becker386a2ef2008-02-01 12:06:54 -0800386static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
387{
388 return (osb->s_feature_incompat &
389 OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP);
390}
391
392
Mark Fashehccd979b2005-12-15 14:31:24 -0800393#define OCFS2_IS_VALID_DINODE(ptr) \
394 (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE))
395
396#define OCFS2_RO_ON_INVALID_DINODE(__sb, __di) do { \
397 typeof(__di) ____di = (__di); \
398 ocfs2_error((__sb), \
Mark Fashehb0697052006-03-03 10:24:33 -0800399 "Dinode # %llu has bad signature %.*s", \
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700400 (unsigned long long)le64_to_cpu((____di)->i_blkno), 7, \
Mark Fashehccd979b2005-12-15 14:31:24 -0800401 (____di)->i_signature); \
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700402} while (0)
Mark Fashehccd979b2005-12-15 14:31:24 -0800403
404#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
405 (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
406
407#define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
408 typeof(__eb) ____eb = (__eb); \
409 ocfs2_error((__sb), \
Mark Fashehb0697052006-03-03 10:24:33 -0800410 "Extent Block # %llu has bad signature %.*s", \
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700411 (unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \
Mark Fashehccd979b2005-12-15 14:31:24 -0800412 (____eb)->h_signature); \
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700413} while (0)
Mark Fashehccd979b2005-12-15 14:31:24 -0800414
415#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
416 (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))
417
418#define OCFS2_RO_ON_INVALID_GROUP_DESC(__sb, __gd) do { \
419 typeof(__gd) ____gd = (__gd); \
420 ocfs2_error((__sb), \
Mark Fashehb0697052006-03-03 10:24:33 -0800421 "Group Descriptor # %llu has bad signature %.*s", \
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700422 (unsigned long long)le64_to_cpu((____gd)->bg_blkno), 7, \
Mark Fashehccd979b2005-12-15 14:31:24 -0800423 (____gd)->bg_signature); \
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700424} while (0)
Mark Fashehccd979b2005-12-15 14:31:24 -0800425
426static inline unsigned long ino_from_blkno(struct super_block *sb,
427 u64 blkno)
428{
429 return (unsigned long)(blkno & (u64)ULONG_MAX);
430}
431
432static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
433 u32 clusters)
434{
435 int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits -
436 sb->s_blocksize_bits;
437
438 return (u64)clusters << c_to_b_bits;
439}
440
441static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
442 u64 blocks)
443{
444 int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
445 sb->s_blocksize_bits;
446
447 return (u32)(blocks >> b_to_c_bits);
448}
449
450static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb,
451 u64 bytes)
452{
453 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
454 unsigned int clusters;
455
456 bytes += OCFS2_SB(sb)->s_clustersize - 1;
457 /* OCFS2 just cannot have enough clusters to overflow this */
458 clusters = (unsigned int)(bytes >> cl_bits);
459
460 return clusters;
461}
462
463static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb,
464 u64 bytes)
465{
466 bytes += sb->s_blocksize - 1;
467 return bytes >> sb->s_blocksize_bits;
468}
469
470static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb,
471 u32 clusters)
472{
473 return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits;
474}
475
476static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb,
477 u64 bytes)
478{
479 int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
480 unsigned int clusters;
481
482 clusters = ocfs2_clusters_for_bytes(sb, bytes);
483 return (u64)clusters << cl_bits;
484}
485
486static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb,
487 u64 bytes)
488{
489 u64 blocks;
490
491 blocks = ocfs2_blocks_for_bytes(sb, bytes);
492 return blocks << sb->s_blocksize_bits;
493}
494
495static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes)
496{
497 return (unsigned long)((bytes + 511) >> 9);
498}
499
Mark Fasheh9517bac2007-02-09 20:24:12 -0800500static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb,
501 unsigned long pg_index)
502{
503 u32 clusters = pg_index;
504 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
505
506 if (unlikely(PAGE_CACHE_SHIFT > cbits))
507 clusters = pg_index << (PAGE_CACHE_SHIFT - cbits);
508 else if (PAGE_CACHE_SHIFT < cbits)
509 clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT);
510
511 return clusters;
512}
513
514/*
515 * Find the 1st page index which covers the given clusters.
516 */
Mark Fasheh7c08d702007-07-20 11:58:36 -0700517static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb,
Mark Fasheh9517bac2007-02-09 20:24:12 -0800518 u32 clusters)
519{
520 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
Mark Fasheh7c08d702007-07-20 11:58:36 -0700521 pgoff_t index = clusters;
Mark Fasheh9517bac2007-02-09 20:24:12 -0800522
523 if (PAGE_CACHE_SHIFT > cbits) {
Mark Fasheh7c08d702007-07-20 11:58:36 -0700524 index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits);
Mark Fasheh9517bac2007-02-09 20:24:12 -0800525 } else if (PAGE_CACHE_SHIFT < cbits) {
Mark Fasheh7c08d702007-07-20 11:58:36 -0700526 index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT);
Mark Fasheh9517bac2007-02-09 20:24:12 -0800527 }
528
529 return index;
530}
531
Mark Fasheh60b11392007-02-16 11:46:50 -0800532static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb)
533{
534 unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits;
535 unsigned int pages_per_cluster = 1;
536
537 if (PAGE_CACHE_SHIFT < cbits)
538 pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT);
539
540 return pages_per_cluster;
541}
542
Tao Ma4d0ddb22008-03-05 16:11:46 +0800543static inline void ocfs2_init_inode_steal_slot(struct ocfs2_super *osb)
544{
545 spin_lock(&osb->osb_lock);
546 osb->s_inode_steal_slot = OCFS2_INVALID_SLOT;
547 spin_unlock(&osb->osb_lock);
548 atomic_set(&osb->s_num_inodes_stolen, 0);
549}
550
551static inline void ocfs2_set_inode_steal_slot(struct ocfs2_super *osb,
552 s16 slot)
553{
554 spin_lock(&osb->osb_lock);
555 osb->s_inode_steal_slot = slot;
556 spin_unlock(&osb->osb_lock);
557}
558
559static inline s16 ocfs2_get_inode_steal_slot(struct ocfs2_super *osb)
560{
561 s16 slot;
562
563 spin_lock(&osb->osb_lock);
564 slot = osb->s_inode_steal_slot;
565 spin_unlock(&osb->osb_lock);
566
567 return slot;
568}
569
Mark Fashehccd979b2005-12-15 14:31:24 -0800570#define ocfs2_set_bit ext2_set_bit
571#define ocfs2_clear_bit ext2_clear_bit
572#define ocfs2_test_bit ext2_test_bit
573#define ocfs2_find_next_zero_bit ext2_find_next_zero_bit
574#endif /* OCFS2_H */
575