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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[linux.git] / fs / ocfs2 / ocfs2_fs.h
CommitLineData
ccd979bd
MF		 1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * ocfs2_fs.h
5 *
6 * On-disk structures for 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, version 2, as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 021110-1307, USA.
23 */
24
25#ifndef _OCFS2_FS_H
26#define _OCFS2_FS_H
27
28/* Version */
29#define OCFS2_MAJOR_REV_LEVEL 0
30#define OCFS2_MINOR_REV_LEVEL 90
31
32/*
33 * An OCFS2 volume starts this way:
34 * Sector 0: Valid ocfs1_vol_disk_hdr that cleanly fails to mount OCFS.
35 * Sector 1: Valid ocfs1_vol_label that cleanly fails to mount OCFS.
36 * Block OCFS2_SUPER_BLOCK_BLKNO: OCFS2 superblock.
37 *
38 * All other structures are found from the superblock information.
39 *
40 * OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a
41 * blocksize of 2K, it is 4096 bytes into disk.
42 */
43#define OCFS2_SUPER_BLOCK_BLKNO 2
44
45/*
46 * Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could
47 * grow if needed.
48 */
49#define OCFS2_MIN_CLUSTERSIZE 4096
50#define OCFS2_MAX_CLUSTERSIZE 1048576
51
52/*
53 * Blocks cannot be bigger than clusters, so the maximum blocksize is the
54 * minimum cluster size.
55 */
56#define OCFS2_MIN_BLOCKSIZE 512
57#define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE
58
59/* Filesystem magic number */
60#define OCFS2_SUPER_MAGIC 0x7461636f
61
62/* Object signatures */
63#define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
64#define OCFS2_INODE_SIGNATURE "INODE01"
65#define OCFS2_EXTENT_BLOCK_SIGNATURE "EXBLK01"
66#define OCFS2_GROUP_DESC_SIGNATURE "GROUP01"
67
68/* Compatibility flags */
69#define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \
70 ( OCFS2_SB(sb)->s_feature_compat & (mask) )
71#define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \
72 ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) )
73#define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \
74 ( OCFS2_SB(sb)->s_feature_incompat & (mask) )
75#define OCFS2_SET_COMPAT_FEATURE(sb,mask) \
76 OCFS2_SB(sb)->s_feature_compat |= (mask)
77#define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \
78 OCFS2_SB(sb)->s_feature_ro_compat |= (mask)
79#define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \
80 OCFS2_SB(sb)->s_feature_incompat |= (mask)
81#define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \
82 OCFS2_SB(sb)->s_feature_compat &= ~(mask)
83#define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
84 OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask)
85#define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
86 OCFS2_SB(sb)->s_feature_incompat &= ~(mask)
87
88#define OCFS2_FEATURE_COMPAT_SUPP 0
89#define OCFS2_FEATURE_INCOMPAT_SUPP 0
90#define OCFS2_FEATURE_RO_COMPAT_SUPP 0
91
92/*
93 * Heartbeat-only devices are missing journals and other files. The
94 * filesystem driver can't load them, but the library can. Never put
95 * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*.
96 */
97#define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002
98
99
100/*
101 * Flags on ocfs2_dinode.i_flags
102 */
103#define OCFS2_VALID_FL (0x00000001) /* Inode is valid */
104#define OCFS2_UNUSED2_FL (0x00000002)
105#define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */
106#define OCFS2_UNUSED3_FL (0x00000008)
107/* System inode flags */
108#define OCFS2_SYSTEM_FL (0x00000010) /* System inode */
109#define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */
110#define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */
111#define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */
112#define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */
113#define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */
114#define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */
115#define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */
116
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HP		 117/* Inode attributes, keep in sync with EXT2 */
118#define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */
119#define OCFS2_UNRM_FL (0x00000002) /* Undelete */
120#define OCFS2_COMPR_FL (0x00000004) /* Compress file */
121#define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */
122#define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */
123#define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */
124#define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */
125#define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */
126#define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */
127
128#define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */
129#define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */
130
131/*
132 * ioctl commands
133 */
134#define OCFS2_IOC_GETFLAGS _IOR('f', 1, long)
135#define OCFS2_IOC_SETFLAGS _IOW('f', 2, long)
136
ccd979bd
MF		 137/*
138 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
139 */
140#define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */
141
142/*
143 * superblock s_state flags
144 */
145#define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */
146
147/* Limit of space in ocfs2_dir_entry */
148#define OCFS2_MAX_FILENAME_LEN 255
149
150/* Maximum slots on an ocfs2 file system */
151#define OCFS2_MAX_SLOTS 255
152
153/* Slot map indicator for an empty slot */
154#define OCFS2_INVALID_SLOT -1
155
156#define OCFS2_VOL_UUID_LEN 16
157#define OCFS2_MAX_VOL_LABEL_LEN 64
158
159/* Journal limits (in bytes) */
160#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
ccd979bd
MF		 161
162struct ocfs2_system_inode_info {
163 char *si_name;
164 int si_iflags;
165 int si_mode;
166};
167
168/* System file index */
169enum {
170 BAD_BLOCK_SYSTEM_INODE = 0,
171 GLOBAL_INODE_ALLOC_SYSTEM_INODE,
172 SLOT_MAP_SYSTEM_INODE,
173#define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE
174 HEARTBEAT_SYSTEM_INODE,
175 GLOBAL_BITMAP_SYSTEM_INODE,
176#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_SYSTEM_INODE
177 ORPHAN_DIR_SYSTEM_INODE,
178 EXTENT_ALLOC_SYSTEM_INODE,
179 INODE_ALLOC_SYSTEM_INODE,
180 JOURNAL_SYSTEM_INODE,
181 LOCAL_ALLOC_SYSTEM_INODE,
182 TRUNCATE_LOG_SYSTEM_INODE,
183 NUM_SYSTEM_INODES
184};
185
186static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
187 /* Global system inodes (single copy) */
188 /* The first two are only used from userspace mfks/tunefs */
189 [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 },
190 [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
191
192 /* These are used by the running filesystem */
193 [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 },
194 [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 },
195 [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 },
196
197 /* Slot-specific system inodes (one copy per slot) */
198 [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 },
199 [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
200 [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
201 [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 },
202 [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 },
203 [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 }
204};
205
206/* Parameter passed from mount.ocfs2 to module */
207#define OCFS2_HB_NONE "heartbeat=none"
208#define OCFS2_HB_LOCAL "heartbeat=local"
209
210/*
211 * OCFS2 directory file types. Only the low 3 bits are used. The
212 * other bits are reserved for now.
213 */
214#define OCFS2_FT_UNKNOWN 0
215#define OCFS2_FT_REG_FILE 1
216#define OCFS2_FT_DIR 2
217#define OCFS2_FT_CHRDEV 3
218#define OCFS2_FT_BLKDEV 4
219#define OCFS2_FT_FIFO 5
220#define OCFS2_FT_SOCK 6
221#define OCFS2_FT_SYMLINK 7
222
223#define OCFS2_FT_MAX 8
224
225/*
226 * OCFS2_DIR_PAD defines the directory entries boundaries
227 *
228 * NOTE: It must be a multiple of 4
229 */
230#define OCFS2_DIR_PAD 4
231#define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1)
232#define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name)
233#define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \
234 OCFS2_DIR_ROUND) & \
235 ~OCFS2_DIR_ROUND)
236
237#define OCFS2_LINK_MAX 32000
238
239#define S_SHIFT 12
240static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
241 [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE,
242 [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR,
243 [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV,
244 [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV,
245 [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO,
246 [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK,
247 [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK,
248};
249
250
251/*
252 * Convenience casts
253 */
254#define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super))
255
256/*
257 * On disk extent record for OCFS2
258 * It describes a range of clusters on disk.
259 */
260struct ocfs2_extent_rec {
261/*00*/ __le32 e_cpos; /* Offset into the file, in clusters */
262 __le32 e_clusters; /* Clusters covered by this extent */
263 __le64 e_blkno; /* Physical disk offset, in blocks */
264/*10*/
265};
266
267struct ocfs2_chain_rec {
268 __le32 c_free; /* Number of free bits in this chain. */
269 __le32 c_total; /* Number of total bits in this chain */
270 __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */
271};
272
273struct ocfs2_truncate_rec {
274 __le32 t_start; /* 1st cluster in this log */
275 __le32 t_clusters; /* Number of total clusters covered */
276};
277
278/*
279 * On disk extent list for OCFS2 (node in the tree). Note that this
280 * is contained inside ocfs2_dinode or ocfs2_extent_block, so the
281 * offsets are relative to ocfs2_dinode.id2.i_list or
282 * ocfs2_extent_block.h_list, respectively.
283 */
284struct ocfs2_extent_list {
285/*00*/ __le16 l_tree_depth; /* Extent tree depth from this
286 point. 0 means data extents
287 hang directly off this
288 header (a leaf) */
289 __le16 l_count; /* Number of extent records */
290 __le16 l_next_free_rec; /* Next unused extent slot */
291 __le16 l_reserved1;
292 __le64 l_reserved2; /* Pad to
293 sizeof(ocfs2_extent_rec) */
294/*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */
295};
296
297/*
298 * On disk allocation chain list for OCFS2. Note that this is
299 * contained inside ocfs2_dinode, so the offsets are relative to
300 * ocfs2_dinode.id2.i_chain.
301 */
302struct ocfs2_chain_list {
303/*00*/ __le16 cl_cpg; /* Clusters per Block Group */
304 __le16 cl_bpc; /* Bits per cluster */
305 __le16 cl_count; /* Total chains in this list */
306 __le16 cl_next_free_rec; /* Next unused chain slot */
307 __le64 cl_reserved1;
308/*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */
309};
310
311/*
312 * On disk deallocation log for OCFS2. Note that this is
313 * contained inside ocfs2_dinode, so the offsets are relative to
314 * ocfs2_dinode.id2.i_dealloc.
315 */
316struct ocfs2_truncate_log {
317/*00*/ __le16 tl_count; /* Total records in this log */
318 __le16 tl_used; /* Number of records in use */
319 __le32 tl_reserved1;
320/*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */
321};
322
323/*
324 * On disk extent block (indirect block) for OCFS2
325 */
326struct ocfs2_extent_block
327{
328/*00*/ __u8 h_signature[8]; /* Signature for verification */
329 __le64 h_reserved1;
330/*10*/ __le16 h_suballoc_slot; /* Slot suballocator this
331 extent_header belongs to */
332 __le16 h_suballoc_bit; /* Bit offset in suballocator
333 block group */
334 __le32 h_fs_generation; /* Must match super block */
335 __le64 h_blkno; /* Offset on disk, in blocks */
336/*20*/ __le64 h_reserved3;
337 __le64 h_next_leaf_blk; /* Offset on disk, in blocks,
338 of next leaf header pointing
339 to data */
340/*30*/ struct ocfs2_extent_list h_list; /* Extent record list */
341/* Actual on-disk size is one block */
342};
343
344/*
345 * On disk superblock for OCFS2
346 * Note that it is contained inside an ocfs2_dinode, so all offsets
347 * are relative to the start of ocfs2_dinode.id2.
348 */
349struct ocfs2_super_block {
350/*00*/ __le16 s_major_rev_level;
351 __le16 s_minor_rev_level;
352 __le16 s_mnt_count;
353 __le16 s_max_mnt_count;
354 __le16 s_state; /* File system state */
355 __le16 s_errors; /* Behaviour when detecting errors */
356 __le32 s_checkinterval; /* Max time between checks */
357/*10*/ __le64 s_lastcheck; /* Time of last check */
358 __le32 s_creator_os; /* OS */
359 __le32 s_feature_compat; /* Compatible feature set */
360/*20*/ __le32 s_feature_incompat; /* Incompatible feature set */
361 __le32 s_feature_ro_compat; /* Readonly-compatible feature set */
362 __le64 s_root_blkno; /* Offset, in blocks, of root directory
363 dinode */
364/*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system
365 directory dinode */
366 __le32 s_blocksize_bits; /* Blocksize for this fs */
367 __le32 s_clustersize_bits; /* Clustersize for this fs */
368/*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
369 before tunefs required */
370 __le16 s_reserved1;
371 __le32 s_reserved2;
372 __le64 s_first_cluster_group; /* Block offset of 1st cluster
373 * group header */
374/*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
375/*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
376/*A0*/
377};
378
379/*
380 * Local allocation bitmap for OCFS2 slots
381 * Note that it exists inside an ocfs2_dinode, so all offsets are
382 * relative to the start of ocfs2_dinode.id2.
383 */
384struct ocfs2_local_alloc
385{
386/*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */
387 __le16 la_size; /* Size of included bitmap, in bytes */
388 __le16 la_reserved1;
389 __le64 la_reserved2;
390/*10*/ __u8 la_bitmap[0];
391};
392
393/*
394 * On disk inode for OCFS2
395 */
396struct ocfs2_dinode {
397/*00*/ __u8 i_signature[8]; /* Signature for validation */
398 __le32 i_generation; /* Generation number */
399 __le16 i_suballoc_slot; /* Slot suballocator this inode
400 belongs to */
401 __le16 i_suballoc_bit; /* Bit offset in suballocator
402 block group */
403/*10*/ __le32 i_reserved0;
404 __le32 i_clusters; /* Cluster count */
405 __le32 i_uid; /* Owner UID */
406 __le32 i_gid; /* Owning GID */
407/*20*/ __le64 i_size; /* Size in bytes */
408 __le16 i_mode; /* File mode */
409 __le16 i_links_count; /* Links count */
410 __le32 i_flags; /* File flags */
411/*30*/ __le64 i_atime; /* Access time */
412 __le64 i_ctime; /* Creation time */
413/*40*/ __le64 i_mtime; /* Modification time */
414 __le64 i_dtime; /* Deletion time */
415/*50*/ __le64 i_blkno; /* Offset on disk, in blocks */
416 __le64 i_last_eb_blk; /* Pointer to last extent
417 block */
418/*60*/ __le32 i_fs_generation; /* Generation per fs-instance */
419 __le32 i_atime_nsec;
420 __le32 i_ctime_nsec;
421 __le32 i_mtime_nsec;
ca4d147e
HP		 422 __le32 i_attr;
423 __le32 i_reserved1;
424/*70*/ __le64 i_reserved2[8];
ccd979bd
MF		 425/*B8*/ union {
426 __le64 i_pad1; /* Generic way to refer to this
427 64bit union */
428 struct {
429 __le64 i_rdev; /* Device number */
430 } dev1;
431 struct { /* Info for bitmap system
432 inodes */
433 __le32 i_used; /* Bits (ie, clusters) used */
434 __le32 i_total; /* Total bits (clusters)
435 available */
436 } bitmap1;
437 struct { /* Info for journal system
438 inodes */
439 __le32 ij_flags; /* Mounted, version, etc. */
440 __le32 ij_pad;
441 } journal1;
442 } id1; /* Inode type dependant 1 */
443/*C0*/ union {
444 struct ocfs2_super_block i_super;
445 struct ocfs2_local_alloc i_lab;
446 struct ocfs2_chain_list i_chain;
447 struct ocfs2_extent_list i_list;
448 struct ocfs2_truncate_log i_dealloc;
449 __u8 i_symlink[0];
450 } id2;
451/* Actual on-disk size is one block */
452};
453
454/*
455 * On-disk directory entry structure for OCFS2
456 *
457 * Packed as this structure could be accessed unaligned on 64-bit platforms
458 */
459struct ocfs2_dir_entry {
460/*00*/ __le64 inode; /* Inode number */
461 __le16 rec_len; /* Directory entry length */
462 __u8 name_len; /* Name length */
463 __u8 file_type;
464/*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */
465/* Actual on-disk length specified by rec_len */
466} __attribute__ ((packed));
467
468/*
469 * On disk allocator group structure for OCFS2
470 */
471struct ocfs2_group_desc
472{
473/*00*/ __u8 bg_signature[8]; /* Signature for validation */
474 __le16 bg_size; /* Size of included bitmap in
475 bytes. */
476 __le16 bg_bits; /* Bits represented by this
477 group. */
478 __le16 bg_free_bits_count; /* Free bits count */
479 __le16 bg_chain; /* What chain I am in. */
480/*10*/ __le32 bg_generation;
481 __le32 bg_reserved1;
482 __le64 bg_next_group; /* Next group in my list, in
483 blocks */
484/*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in
485 blocks */
486 __le64 bg_blkno; /* Offset on disk, in blocks */
487/*30*/ __le64 bg_reserved2[2];
488/*40*/ __u8 bg_bitmap[0];
489};
490
491#ifdef __KERNEL__
492static inline int ocfs2_fast_symlink_chars(struct super_block *sb)
493{
494 return sb->s_blocksize -
495 offsetof(struct ocfs2_dinode, id2.i_symlink);
496}
497
498static inline int ocfs2_extent_recs_per_inode(struct super_block *sb)
499{
500 int size;
501
502 size = sb->s_blocksize -
503 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
504
505 return size / sizeof(struct ocfs2_extent_rec);
506}
507
508static inline int ocfs2_chain_recs_per_inode(struct super_block *sb)
509{
510 int size;
511
512 size = sb->s_blocksize -
513 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
514
515 return size / sizeof(struct ocfs2_chain_rec);
516}
517
518static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb)
519{
520 int size;
521
522 size = sb->s_blocksize -
523 offsetof(struct ocfs2_extent_block, h_list.l_recs);
524
525 return size / sizeof(struct ocfs2_extent_rec);
526}
527
528static inline u16 ocfs2_local_alloc_size(struct super_block *sb)
529{
530 u16 size;
531
532 size = sb->s_blocksize -
533 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
534
535 return size;
536}
537
538static inline int ocfs2_group_bitmap_size(struct super_block *sb)
539{
540 int size;
541
542 size = sb->s_blocksize -
543 offsetof(struct ocfs2_group_desc, bg_bitmap);
544
545 return size;
546}
547
548static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb)
549{
550 int size;
551
552 size = sb->s_blocksize -
553 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
554
555 return size / sizeof(struct ocfs2_truncate_rec);
556}
557#else
558static inline int ocfs2_fast_symlink_chars(int blocksize)
559{
560 return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink);
561}
562
563static inline int ocfs2_extent_recs_per_inode(int blocksize)
564{
565 int size;
566
567 size = blocksize -
568 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
569
570 return size / sizeof(struct ocfs2_extent_rec);
571}
572
573static inline int ocfs2_chain_recs_per_inode(int blocksize)
574{
575 int size;
576
577 size = blocksize -
578 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
579
580 return size / sizeof(struct ocfs2_chain_rec);
581}
582
583static inline int ocfs2_extent_recs_per_eb(int blocksize)
584{
585 int size;
586
587 size = blocksize -
588 offsetof(struct ocfs2_extent_block, h_list.l_recs);
589
590 return size / sizeof(struct ocfs2_extent_rec);
591}
592
593static inline int ocfs2_local_alloc_size(int blocksize)
594{
595 int size;
596
597 size = blocksize -
598 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
599
600 return size;
601}
602
603static inline int ocfs2_group_bitmap_size(int blocksize)
604{
605 int size;
606
607 size = blocksize -
608 offsetof(struct ocfs2_group_desc, bg_bitmap);
609
610 return size;
611}
612
613static inline int ocfs2_truncate_recs_per_inode(int blocksize)
614{
615 int size;
616
617 size = blocksize -
618 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
619
620 return size / sizeof(struct ocfs2_truncate_rec);
621}
622#endif /* __KERNEL__ */
623
624
625static inline int ocfs2_system_inode_is_global(int type)
626{
627 return ((type >= 0) &&
628 (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE));
629}
630
631static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
632 int type, int slot)
633{
634 int chars;
635
636 /*
637 * Global system inodes can only have one copy. Everything
638 * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode
639 * list has a copy per slot.
640 */
641 if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
642 chars = snprintf(buf, len,
643 ocfs2_system_inodes[type].si_name);
644 else
645 chars = snprintf(buf, len,
646 ocfs2_system_inodes[type].si_name,
647 slot);
648
649 return chars;
650}
651
652static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
653 umode_t mode)
654{
655 de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
656}
657
658#endif /* _OCFS2_FS_H */
659
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