]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4613ad18 AV |
2 | * Written by Stephen C. Tweedie <sct@redhat.com>, 1999 |
3 | * | |
4 | * Copyright 1998--1999 Red Hat corp --- All Rights Reserved | |
5 | * | |
6 | * This file is part of the Linux kernel and is made available under | |
7 | * the terms of the GNU General Public License, version 2, or at your | |
8 | * option, any later version, incorporated herein by reference. | |
1da177e4 LT |
9 | * |
10 | * Copyright (C) 1992, 1993, 1994, 1995 | |
11 | * Remy Card (card@masi.ibp.fr) | |
12 | * Laboratoire MASI - Institut Blaise Pascal | |
13 | * Universite Pierre et Marie Curie (Paris VI) | |
14 | * | |
15 | * from | |
16 | * | |
17 | * linux/include/linux/minix_fs.h | |
18 | * | |
19 | * Copyright (C) 1991, 1992 Linus Torvalds | |
20 | */ | |
21 | ||
4613ad18 AV |
22 | #include <linux/fs.h> |
23 | #include <linux/jbd.h> | |
e18fa700 | 24 | #include <linux/magic.h> |
187f1882 | 25 | #include <linux/bug.h> |
4613ad18 | 26 | #include <linux/blockgroup_lock.h> |
1da177e4 LT |
27 | |
28 | /* | |
29 | * The second extended filesystem constants/structures | |
30 | */ | |
31 | ||
32 | /* | |
33 | * Define EXT3FS_DEBUG to produce debug messages | |
34 | */ | |
35 | #undef EXT3FS_DEBUG | |
36 | ||
37 | /* | |
38 | * Define EXT3_RESERVATION to reserve data blocks for expanding files | |
39 | */ | |
40 | #define EXT3_DEFAULT_RESERVE_BLOCKS 8 | |
b54e41ec MC |
41 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
42 | #define EXT3_MAX_RESERVE_BLOCKS 1027 | |
1da177e4 | 43 | #define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0 |
1da177e4 LT |
44 | |
45 | /* | |
46 | * Debug code | |
47 | */ | |
48 | #ifdef EXT3FS_DEBUG | |
49 | #define ext3_debug(f, a...) \ | |
50 | do { \ | |
51 | printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \ | |
d5c003b4 | 52 | __FILE__, __LINE__, __func__); \ |
1da177e4 LT |
53 | printk (KERN_DEBUG f, ## a); \ |
54 | } while (0) | |
55 | #else | |
56 | #define ext3_debug(f, a...) do {} while (0) | |
57 | #endif | |
58 | ||
59 | /* | |
60 | * Special inodes numbers | |
61 | */ | |
62 | #define EXT3_BAD_INO 1 /* Bad blocks inode */ | |
63 | #define EXT3_ROOT_INO 2 /* Root inode */ | |
64 | #define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */ | |
65 | #define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */ | |
66 | #define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */ | |
67 | #define EXT3_JOURNAL_INO 8 /* Journal inode */ | |
68 | ||
69 | /* First non-reserved inode for old ext3 filesystems */ | |
70 | #define EXT3_GOOD_OLD_FIRST_INO 11 | |
71 | ||
1da177e4 LT |
72 | /* |
73 | * Maximal count of links to a file | |
74 | */ | |
75 | #define EXT3_LINK_MAX 32000 | |
76 | ||
77 | /* | |
78 | * Macro-instructions used to manage several block sizes | |
79 | */ | |
80 | #define EXT3_MIN_BLOCK_SIZE 1024 | |
0f0a89eb TS |
81 | #define EXT3_MAX_BLOCK_SIZE 65536 |
82 | #define EXT3_MIN_BLOCK_LOG_SIZE 10 | |
4613ad18 | 83 | #define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize) |
1da177e4 | 84 | #define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32)) |
4613ad18 | 85 | #define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
1da177e4 LT |
86 | #define EXT3_ADDR_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_addr_per_block_bits) |
87 | #define EXT3_INODE_SIZE(s) (EXT3_SB(s)->s_inode_size) | |
88 | #define EXT3_FIRST_INO(s) (EXT3_SB(s)->s_first_ino) | |
1da177e4 LT |
89 | |
90 | /* | |
91 | * Macro-instructions used to manage fragments | |
92 | */ | |
93 | #define EXT3_MIN_FRAG_SIZE 1024 | |
94 | #define EXT3_MAX_FRAG_SIZE 4096 | |
95 | #define EXT3_MIN_FRAG_LOG_SIZE 10 | |
4613ad18 AV |
96 | #define EXT3_FRAG_SIZE(s) (EXT3_SB(s)->s_frag_size) |
97 | #define EXT3_FRAGS_PER_BLOCK(s) (EXT3_SB(s)->s_frags_per_block) | |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Structure of a blocks group descriptor | |
101 | */ | |
102 | struct ext3_group_desc | |
103 | { | |
104 | __le32 bg_block_bitmap; /* Blocks bitmap block */ | |
105 | __le32 bg_inode_bitmap; /* Inodes bitmap block */ | |
106 | __le32 bg_inode_table; /* Inodes table block */ | |
107 | __le16 bg_free_blocks_count; /* Free blocks count */ | |
108 | __le16 bg_free_inodes_count; /* Free inodes count */ | |
109 | __le16 bg_used_dirs_count; /* Directories count */ | |
110 | __u16 bg_pad; | |
111 | __le32 bg_reserved[3]; | |
112 | }; | |
113 | ||
114 | /* | |
115 | * Macro-instructions used to manage group descriptors | |
116 | */ | |
4613ad18 AV |
117 | #define EXT3_BLOCKS_PER_GROUP(s) (EXT3_SB(s)->s_blocks_per_group) |
118 | #define EXT3_DESC_PER_BLOCK(s) (EXT3_SB(s)->s_desc_per_block) | |
119 | #define EXT3_INODES_PER_GROUP(s) (EXT3_SB(s)->s_inodes_per_group) | |
120 | #define EXT3_DESC_PER_BLOCK_BITS(s) (EXT3_SB(s)->s_desc_per_block_bits) | |
1da177e4 LT |
121 | |
122 | /* | |
123 | * Constants relative to the data blocks | |
124 | */ | |
125 | #define EXT3_NDIR_BLOCKS 12 | |
126 | #define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS | |
127 | #define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1) | |
128 | #define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1) | |
129 | #define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1) | |
130 | ||
131 | /* | |
132 | * Inode flags | |
133 | */ | |
134 | #define EXT3_SECRM_FL 0x00000001 /* Secure deletion */ | |
135 | #define EXT3_UNRM_FL 0x00000002 /* Undelete */ | |
136 | #define EXT3_COMPR_FL 0x00000004 /* Compress file */ | |
137 | #define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */ | |
138 | #define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
139 | #define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */ | |
140 | #define EXT3_NODUMP_FL 0x00000040 /* do not dump file */ | |
141 | #define EXT3_NOATIME_FL 0x00000080 /* do not update atime */ | |
142 | /* Reserved for compression usage... */ | |
143 | #define EXT3_DIRTY_FL 0x00000100 | |
144 | #define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
145 | #define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */ | |
146 | #define EXT3_ECOMPR_FL 0x00000800 /* Compression error */ | |
147 | /* End compression flags --- maybe not all used */ | |
148 | #define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */ | |
149 | #define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */ | |
150 | #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ | |
151 | #define EXT3_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
152 | #define EXT3_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
153 | #define EXT3_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
154 | #define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */ | |
155 | ||
156 | #define EXT3_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ | |
157 | #define EXT3_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ | |
158 | ||
2e8671cb DG |
159 | /* Flags that should be inherited by new inodes from their parent. */ |
160 | #define EXT3_FL_INHERITED (EXT3_SECRM_FL | EXT3_UNRM_FL | EXT3_COMPR_FL |\ | |
1cd9f097 TT |
161 | EXT3_SYNC_FL | EXT3_NODUMP_FL |\ |
162 | EXT3_NOATIME_FL | EXT3_COMPRBLK_FL |\ | |
2e8671cb DG |
163 | EXT3_NOCOMPR_FL | EXT3_JOURNAL_DATA_FL |\ |
164 | EXT3_NOTAIL_FL | EXT3_DIRSYNC_FL) | |
165 | ||
04143e2f DG |
166 | /* Flags that are appropriate for regular files (all but dir-specific ones). */ |
167 | #define EXT3_REG_FLMASK (~(EXT3_DIRSYNC_FL | EXT3_TOPDIR_FL)) | |
168 | ||
169 | /* Flags that are appropriate for non-directories/regular files. */ | |
170 | #define EXT3_OTHER_FLMASK (EXT3_NODUMP_FL | EXT3_NOATIME_FL) | |
171 | ||
172 | /* Mask out flags that are inappropriate for the given type of inode. */ | |
173 | static inline __u32 ext3_mask_flags(umode_t mode, __u32 flags) | |
174 | { | |
175 | if (S_ISDIR(mode)) | |
176 | return flags; | |
177 | else if (S_ISREG(mode)) | |
178 | return flags & EXT3_REG_FLMASK; | |
179 | else | |
180 | return flags & EXT3_OTHER_FLMASK; | |
181 | } | |
182 | ||
1da177e4 LT |
183 | /* Used to pass group descriptor data when online resize is done */ |
184 | struct ext3_new_group_input { | |
185 | __u32 group; /* Group number for this data */ | |
186 | __u32 block_bitmap; /* Absolute block number of block bitmap */ | |
187 | __u32 inode_bitmap; /* Absolute block number of inode bitmap */ | |
188 | __u32 inode_table; /* Absolute block number of inode table start */ | |
189 | __u32 blocks_count; /* Total number of blocks in this group */ | |
190 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
191 | __u16 unused; | |
192 | }; | |
193 | ||
194 | /* The struct ext3_new_group_input in kernel space, with free_blocks_count */ | |
195 | struct ext3_new_group_data { | |
196 | __u32 group; | |
197 | __u32 block_bitmap; | |
198 | __u32 inode_bitmap; | |
199 | __u32 inode_table; | |
200 | __u32 blocks_count; | |
201 | __u16 reserved_blocks; | |
202 | __u16 unused; | |
203 | __u32 free_blocks_count; | |
204 | }; | |
205 | ||
206 | ||
207 | /* | |
208 | * ioctl commands | |
209 | */ | |
36695673 DH |
210 | #define EXT3_IOC_GETFLAGS FS_IOC_GETFLAGS |
211 | #define EXT3_IOC_SETFLAGS FS_IOC_SETFLAGS | |
1da177e4 LT |
212 | #define EXT3_IOC_GETVERSION _IOR('f', 3, long) |
213 | #define EXT3_IOC_SETVERSION _IOW('f', 4, long) | |
214 | #define EXT3_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) | |
215 | #define EXT3_IOC_GROUP_ADD _IOW('f', 8,struct ext3_new_group_input) | |
36695673 DH |
216 | #define EXT3_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
217 | #define EXT3_IOC_SETVERSION_OLD FS_IOC_SETVERSION | |
1da177e4 LT |
218 | #ifdef CONFIG_JBD_DEBUG |
219 | #define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) | |
220 | #endif | |
221 | #define EXT3_IOC_GETRSVSZ _IOR('f', 5, long) | |
222 | #define EXT3_IOC_SETRSVSZ _IOW('f', 6, long) | |
223 | ||
36695673 DH |
224 | /* |
225 | * ioctl commands in 32 bit emulation | |
226 | */ | |
52a700c5 DH |
227 | #define EXT3_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
228 | #define EXT3_IOC32_SETFLAGS FS_IOC32_SETFLAGS | |
36695673 DH |
229 | #define EXT3_IOC32_GETVERSION _IOR('f', 3, int) |
230 | #define EXT3_IOC32_SETVERSION _IOW('f', 4, int) | |
231 | #define EXT3_IOC32_GETRSVSZ _IOR('f', 5, int) | |
232 | #define EXT3_IOC32_SETRSVSZ _IOW('f', 6, int) | |
233 | #define EXT3_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | |
234 | #ifdef CONFIG_JBD_DEBUG | |
235 | #define EXT3_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) | |
236 | #endif | |
52a700c5 DH |
237 | #define EXT3_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
238 | #define EXT3_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | |
239 | ||
a93114e4 JK |
240 | /* Number of supported quota types */ |
241 | #define EXT3_MAXQUOTAS 2 | |
36695673 | 242 | |
08c6a96f JK |
243 | /* |
244 | * Mount options | |
245 | */ | |
246 | struct ext3_mount_options { | |
247 | unsigned long s_mount_opt; | |
1523299d EB |
248 | kuid_t s_resuid; |
249 | kgid_t s_resgid; | |
08c6a96f JK |
250 | unsigned long s_commit_interval; |
251 | #ifdef CONFIG_QUOTA | |
252 | int s_jquota_fmt; | |
a93114e4 | 253 | char *s_qf_names[EXT3_MAXQUOTAS]; |
08c6a96f JK |
254 | #endif |
255 | }; | |
256 | ||
1da177e4 LT |
257 | /* |
258 | * Structure of an inode on the disk | |
259 | */ | |
260 | struct ext3_inode { | |
261 | __le16 i_mode; /* File mode */ | |
262 | __le16 i_uid; /* Low 16 bits of Owner Uid */ | |
263 | __le32 i_size; /* Size in bytes */ | |
264 | __le32 i_atime; /* Access time */ | |
265 | __le32 i_ctime; /* Creation time */ | |
266 | __le32 i_mtime; /* Modification time */ | |
267 | __le32 i_dtime; /* Deletion Time */ | |
268 | __le16 i_gid; /* Low 16 bits of Group Id */ | |
269 | __le16 i_links_count; /* Links count */ | |
270 | __le32 i_blocks; /* Blocks count */ | |
271 | __le32 i_flags; /* File flags */ | |
272 | union { | |
273 | struct { | |
274 | __u32 l_i_reserved1; | |
275 | } linux1; | |
276 | struct { | |
277 | __u32 h_i_translator; | |
278 | } hurd1; | |
279 | struct { | |
280 | __u32 m_i_reserved1; | |
281 | } masix1; | |
282 | } osd1; /* OS dependent 1 */ | |
283 | __le32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */ | |
284 | __le32 i_generation; /* File version (for NFS) */ | |
285 | __le32 i_file_acl; /* File ACL */ | |
286 | __le32 i_dir_acl; /* Directory ACL */ | |
287 | __le32 i_faddr; /* Fragment address */ | |
288 | union { | |
289 | struct { | |
290 | __u8 l_i_frag; /* Fragment number */ | |
291 | __u8 l_i_fsize; /* Fragment size */ | |
292 | __u16 i_pad1; | |
293 | __le16 l_i_uid_high; /* these 2 fields */ | |
294 | __le16 l_i_gid_high; /* were reserved2[0] */ | |
295 | __u32 l_i_reserved2; | |
296 | } linux2; | |
297 | struct { | |
298 | __u8 h_i_frag; /* Fragment number */ | |
299 | __u8 h_i_fsize; /* Fragment size */ | |
300 | __u16 h_i_mode_high; | |
301 | __u16 h_i_uid_high; | |
302 | __u16 h_i_gid_high; | |
303 | __u32 h_i_author; | |
304 | } hurd2; | |
305 | struct { | |
306 | __u8 m_i_frag; /* Fragment number */ | |
307 | __u8 m_i_fsize; /* Fragment size */ | |
308 | __u16 m_pad1; | |
309 | __u32 m_i_reserved2[2]; | |
310 | } masix2; | |
311 | } osd2; /* OS dependent 2 */ | |
312 | __le16 i_extra_isize; | |
313 | __le16 i_pad1; | |
314 | }; | |
315 | ||
316 | #define i_size_high i_dir_acl | |
317 | ||
1da177e4 LT |
318 | #define i_reserved1 osd1.linux1.l_i_reserved1 |
319 | #define i_frag osd2.linux2.l_i_frag | |
320 | #define i_fsize osd2.linux2.l_i_fsize | |
321 | #define i_uid_low i_uid | |
322 | #define i_gid_low i_gid | |
323 | #define i_uid_high osd2.linux2.l_i_uid_high | |
324 | #define i_gid_high osd2.linux2.l_i_gid_high | |
325 | #define i_reserved2 osd2.linux2.l_i_reserved2 | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * File system states | |
329 | */ | |
330 | #define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */ | |
331 | #define EXT3_ERROR_FS 0x0002 /* Errors detected */ | |
332 | #define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */ | |
333 | ||
5e1f8c9e TT |
334 | /* |
335 | * Misc. filesystem flags | |
336 | */ | |
337 | #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ | |
338 | #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ | |
339 | #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ | |
340 | ||
1da177e4 LT |
341 | /* |
342 | * Mount flags | |
343 | */ | |
344 | #define EXT3_MOUNT_CHECK 0x00001 /* Do mount-time checks */ | |
fbc85402 | 345 | /* EXT3_MOUNT_OLDALLOC was there */ |
1da177e4 LT |
346 | #define EXT3_MOUNT_GRPID 0x00004 /* Create files with directory's group */ |
347 | #define EXT3_MOUNT_DEBUG 0x00008 /* Some debugging messages */ | |
348 | #define EXT3_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ | |
349 | #define EXT3_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ | |
350 | #define EXT3_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ | |
351 | #define EXT3_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ | |
352 | #define EXT3_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ | |
353 | #define EXT3_MOUNT_ABORT 0x00200 /* Fatal error detected */ | |
354 | #define EXT3_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ | |
355 | #define EXT3_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ | |
356 | #define EXT3_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ | |
357 | #define EXT3_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ | |
358 | #define EXT3_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ | |
359 | #define EXT3_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ | |
360 | #define EXT3_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ | |
361 | #define EXT3_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ | |
362 | #define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */ | |
363 | #define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */ | |
1f54587b | 364 | #define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */ |
8fc2751b MB |
365 | #define EXT3_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ |
366 | #define EXT3_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ | |
0e4fb5e2 HK |
367 | #define EXT3_MOUNT_DATA_ERR_ABORT 0x400000 /* Abort on file data write |
368 | * error in ordered mode */ | |
1da177e4 LT |
369 | |
370 | /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */ | |
371 | #ifndef _LINUX_EXT2_FS_H | |
372 | #define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt | |
373 | #define set_opt(o, opt) o |= EXT3_MOUNT_##opt | |
374 | #define test_opt(sb, opt) (EXT3_SB(sb)->s_mount_opt & \ | |
375 | EXT3_MOUNT_##opt) | |
376 | #else | |
377 | #define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD | |
378 | #define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT | |
379 | #define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS | |
380 | #endif | |
381 | ||
90085930 | 382 | #define ext3_set_bit __set_bit_le |
1da177e4 | 383 | #define ext3_set_bit_atomic ext2_set_bit_atomic |
90085930 | 384 | #define ext3_clear_bit __clear_bit_le |
1da177e4 | 385 | #define ext3_clear_bit_atomic ext2_clear_bit_atomic |
0795ccea | 386 | #define ext3_test_bit test_bit_le |
0795ccea | 387 | #define ext3_find_next_zero_bit find_next_zero_bit_le |
1da177e4 LT |
388 | |
389 | /* | |
390 | * Maximal mount counts between two filesystem checks | |
391 | */ | |
392 | #define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ | |
393 | #define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */ | |
394 | ||
395 | /* | |
396 | * Behaviour when detecting errors | |
397 | */ | |
398 | #define EXT3_ERRORS_CONTINUE 1 /* Continue execution */ | |
399 | #define EXT3_ERRORS_RO 2 /* Remount fs read-only */ | |
400 | #define EXT3_ERRORS_PANIC 3 /* Panic */ | |
401 | #define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE | |
402 | ||
403 | /* | |
404 | * Structure of the super block | |
405 | */ | |
406 | struct ext3_super_block { | |
407 | /*00*/ __le32 s_inodes_count; /* Inodes count */ | |
408 | __le32 s_blocks_count; /* Blocks count */ | |
409 | __le32 s_r_blocks_count; /* Reserved blocks count */ | |
410 | __le32 s_free_blocks_count; /* Free blocks count */ | |
411 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ | |
412 | __le32 s_first_data_block; /* First Data Block */ | |
413 | __le32 s_log_block_size; /* Block size */ | |
414 | __le32 s_log_frag_size; /* Fragment size */ | |
415 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ | |
416 | __le32 s_frags_per_group; /* # Fragments per group */ | |
417 | __le32 s_inodes_per_group; /* # Inodes per group */ | |
418 | __le32 s_mtime; /* Mount time */ | |
419 | /*30*/ __le32 s_wtime; /* Write time */ | |
420 | __le16 s_mnt_count; /* Mount count */ | |
421 | __le16 s_max_mnt_count; /* Maximal mount count */ | |
422 | __le16 s_magic; /* Magic signature */ | |
423 | __le16 s_state; /* File system state */ | |
424 | __le16 s_errors; /* Behaviour when detecting errors */ | |
425 | __le16 s_minor_rev_level; /* minor revision level */ | |
426 | /*40*/ __le32 s_lastcheck; /* time of last check */ | |
427 | __le32 s_checkinterval; /* max. time between checks */ | |
428 | __le32 s_creator_os; /* OS */ | |
429 | __le32 s_rev_level; /* Revision level */ | |
430 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ | |
431 | __le16 s_def_resgid; /* Default gid for reserved blocks */ | |
432 | /* | |
433 | * These fields are for EXT3_DYNAMIC_REV superblocks only. | |
434 | * | |
435 | * Note: the difference between the compatible feature set and | |
436 | * the incompatible feature set is that if there is a bit set | |
437 | * in the incompatible feature set that the kernel doesn't | |
438 | * know about, it should refuse to mount the filesystem. | |
439 | * | |
440 | * e2fsck's requirements are more strict; if it doesn't know | |
441 | * about a feature in either the compatible or incompatible | |
442 | * feature set, it must abort and not try to meddle with | |
443 | * things it doesn't understand... | |
444 | */ | |
445 | __le32 s_first_ino; /* First non-reserved inode */ | |
446 | __le16 s_inode_size; /* size of inode structure */ | |
447 | __le16 s_block_group_nr; /* block group # of this superblock */ | |
448 | __le32 s_feature_compat; /* compatible feature set */ | |
449 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ | |
450 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ | |
451 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ | |
452 | /*78*/ char s_volume_name[16]; /* volume name */ | |
453 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ | |
454 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ | |
455 | /* | |
456 | * Performance hints. Directory preallocation should only | |
457 | * happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on. | |
458 | */ | |
459 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ | |
460 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ | |
a4e4de36 | 461 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ |
1da177e4 LT |
462 | /* |
463 | * Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set. | |
464 | */ | |
465 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ | |
466 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ | |
467 | __le32 s_journal_dev; /* device number of journal file */ | |
468 | __le32 s_last_orphan; /* start of list of inodes to delete */ | |
469 | __le32 s_hash_seed[4]; /* HTREE hash seed */ | |
470 | __u8 s_def_hash_version; /* Default hash version to use */ | |
471 | __u8 s_reserved_char_pad; | |
472 | __u16 s_reserved_word_pad; | |
473 | __le32 s_default_mount_opts; | |
e9ad5620 | 474 | __le32 s_first_meta_bg; /* First metablock block group */ |
5e1f8c9e TT |
475 | __le32 s_mkfs_time; /* When the filesystem was created */ |
476 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ | |
477 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ | |
478 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ | |
479 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ | |
480 | __le32 s_free_blocks_count_hi; /* Free blocks count */ | |
481 | __le16 s_min_extra_isize; /* All inodes have at least # bytes */ | |
482 | __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ | |
483 | __le32 s_flags; /* Miscellaneous flags */ | |
484 | __le16 s_raid_stride; /* RAID stride */ | |
485 | __le16 s_mmp_interval; /* # seconds to wait in MMP checking */ | |
486 | __le64 s_mmp_block; /* Block for multi-mount protection */ | |
487 | __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ | |
488 | __u8 s_log_groups_per_flex; /* FLEX_BG group size */ | |
489 | __u8 s_reserved_char_pad2; | |
490 | __le16 s_reserved_pad; | |
491 | __u32 s_reserved[162]; /* Padding to the end of the block */ | |
1da177e4 LT |
492 | }; |
493 | ||
4613ad18 AV |
494 | /* data type for block offset of block group */ |
495 | typedef int ext3_grpblk_t; | |
496 | ||
497 | /* data type for filesystem-wide blocks number */ | |
498 | typedef unsigned long ext3_fsblk_t; | |
499 | ||
500 | #define E3FSBLK "%lu" | |
501 | ||
502 | struct ext3_reserve_window { | |
503 | ext3_fsblk_t _rsv_start; /* First byte reserved */ | |
504 | ext3_fsblk_t _rsv_end; /* Last byte reserved or 0 */ | |
505 | }; | |
506 | ||
507 | struct ext3_reserve_window_node { | |
508 | struct rb_node rsv_node; | |
509 | __u32 rsv_goal_size; | |
510 | __u32 rsv_alloc_hit; | |
511 | struct ext3_reserve_window rsv_window; | |
512 | }; | |
513 | ||
514 | struct ext3_block_alloc_info { | |
515 | /* information about reservation window */ | |
516 | struct ext3_reserve_window_node rsv_window_node; | |
517 | /* | |
518 | * was i_next_alloc_block in ext3_inode_info | |
519 | * is the logical (file-relative) number of the | |
520 | * most-recently-allocated block in this file. | |
521 | * We use this for detecting linearly ascending allocation requests. | |
522 | */ | |
523 | __u32 last_alloc_logical_block; | |
524 | /* | |
525 | * Was i_next_alloc_goal in ext3_inode_info | |
526 | * is the *physical* companion to i_next_alloc_block. | |
527 | * it the physical block number of the block which was most-recentl | |
528 | * allocated to this file. This give us the goal (target) for the next | |
529 | * allocation when we detect linearly ascending requests. | |
530 | */ | |
531 | ext3_fsblk_t last_alloc_physical_block; | |
532 | }; | |
533 | ||
534 | #define rsv_start rsv_window._rsv_start | |
535 | #define rsv_end rsv_window._rsv_end | |
536 | ||
537 | /* | |
538 | * third extended file system inode data in memory | |
539 | */ | |
540 | struct ext3_inode_info { | |
541 | __le32 i_data[15]; /* unconverted */ | |
542 | __u32 i_flags; | |
543 | #ifdef EXT3_FRAGMENTS | |
544 | __u32 i_faddr; | |
545 | __u8 i_frag_no; | |
546 | __u8 i_frag_size; | |
547 | #endif | |
548 | ext3_fsblk_t i_file_acl; | |
549 | __u32 i_dir_acl; | |
550 | __u32 i_dtime; | |
551 | ||
552 | /* | |
553 | * i_block_group is the number of the block group which contains | |
554 | * this file's inode. Constant across the lifetime of the inode, | |
555 | * it is ued for making block allocation decisions - we try to | |
556 | * place a file's data blocks near its inode block, and new inodes | |
557 | * near to their parent directory's inode. | |
558 | */ | |
559 | __u32 i_block_group; | |
560 | unsigned long i_state_flags; /* Dynamic state flags for ext3 */ | |
561 | ||
562 | /* block reservation info */ | |
563 | struct ext3_block_alloc_info *i_block_alloc_info; | |
564 | ||
565 | __u32 i_dir_start_lookup; | |
566 | #ifdef CONFIG_EXT3_FS_XATTR | |
567 | /* | |
568 | * Extended attributes can be read independently of the main file | |
569 | * data. Taking i_mutex even when reading would cause contention | |
570 | * between readers of EAs and writers of regular file data, so | |
571 | * instead we synchronize on xattr_sem when reading or changing | |
572 | * EAs. | |
573 | */ | |
574 | struct rw_semaphore xattr_sem; | |
575 | #endif | |
576 | ||
577 | struct list_head i_orphan; /* unlinked but open inodes */ | |
578 | ||
579 | /* | |
580 | * i_disksize keeps track of what the inode size is ON DISK, not | |
581 | * in memory. During truncate, i_size is set to the new size by | |
582 | * the VFS prior to calling ext3_truncate(), but the filesystem won't | |
583 | * set i_disksize to 0 until the truncate is actually under way. | |
584 | * | |
585 | * The intent is that i_disksize always represents the blocks which | |
586 | * are used by this file. This allows recovery to restart truncate | |
587 | * on orphans if we crash during truncate. We actually write i_disksize | |
588 | * into the on-disk inode when writing inodes out, instead of i_size. | |
589 | * | |
590 | * The only time when i_disksize and i_size may be different is when | |
591 | * a truncate is in progress. The only things which change i_disksize | |
592 | * are ext3_get_block (growth) and ext3_truncate (shrinkth). | |
593 | */ | |
594 | loff_t i_disksize; | |
595 | ||
596 | /* on-disk additional length */ | |
597 | __u16 i_extra_isize; | |
598 | ||
599 | /* | |
600 | * truncate_mutex is for serialising ext3_truncate() against | |
601 | * ext3_getblock(). In the 2.4 ext2 design, great chunks of inode's | |
602 | * data tree are chopped off during truncate. We can't do that in | |
603 | * ext3 because whenever we perform intermediate commits during | |
604 | * truncate, the inode and all the metadata blocks *must* be in a | |
605 | * consistent state which allows truncation of the orphans to restart | |
606 | * during recovery. Hence we must fix the get_block-vs-truncate race | |
607 | * by other means, so we have truncate_mutex. | |
608 | */ | |
609 | struct mutex truncate_mutex; | |
610 | ||
611 | /* | |
612 | * Transactions that contain inode's metadata needed to complete | |
613 | * fsync and fdatasync, respectively. | |
614 | */ | |
615 | atomic_t i_sync_tid; | |
616 | atomic_t i_datasync_tid; | |
617 | ||
4018cfbc JK |
618 | #ifdef CONFIG_QUOTA |
619 | struct dquot *i_dquot[MAXQUOTAS]; | |
620 | #endif | |
621 | ||
4613ad18 AV |
622 | struct inode vfs_inode; |
623 | }; | |
624 | ||
625 | /* | |
626 | * third extended-fs super-block data in memory | |
627 | */ | |
628 | struct ext3_sb_info { | |
629 | unsigned long s_frag_size; /* Size of a fragment in bytes */ | |
630 | unsigned long s_frags_per_block;/* Number of fragments per block */ | |
631 | unsigned long s_inodes_per_block;/* Number of inodes per block */ | |
632 | unsigned long s_frags_per_group;/* Number of fragments in a group */ | |
633 | unsigned long s_blocks_per_group;/* Number of blocks in a group */ | |
634 | unsigned long s_inodes_per_group;/* Number of inodes in a group */ | |
635 | unsigned long s_itb_per_group; /* Number of inode table blocks per group */ | |
636 | unsigned long s_gdb_count; /* Number of group descriptor blocks */ | |
637 | unsigned long s_desc_per_block; /* Number of group descriptors per block */ | |
638 | unsigned long s_groups_count; /* Number of groups in the fs */ | |
639 | unsigned long s_overhead_last; /* Last calculated overhead */ | |
640 | unsigned long s_blocks_last; /* Last seen block count */ | |
641 | struct buffer_head * s_sbh; /* Buffer containing the super block */ | |
642 | struct ext3_super_block * s_es; /* Pointer to the super block in the buffer */ | |
643 | struct buffer_head ** s_group_desc; | |
644 | unsigned long s_mount_opt; | |
645 | ext3_fsblk_t s_sb_block; | |
1523299d EB |
646 | kuid_t s_resuid; |
647 | kgid_t s_resgid; | |
4613ad18 AV |
648 | unsigned short s_mount_state; |
649 | unsigned short s_pad; | |
650 | int s_addr_per_block_bits; | |
651 | int s_desc_per_block_bits; | |
652 | int s_inode_size; | |
653 | int s_first_ino; | |
654 | spinlock_t s_next_gen_lock; | |
655 | u32 s_next_generation; | |
656 | u32 s_hash_seed[4]; | |
657 | int s_def_hash_version; | |
658 | int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ | |
659 | struct percpu_counter s_freeblocks_counter; | |
660 | struct percpu_counter s_freeinodes_counter; | |
661 | struct percpu_counter s_dirs_counter; | |
662 | struct blockgroup_lock *s_blockgroup_lock; | |
663 | ||
664 | /* root of the per fs reservation window tree */ | |
665 | spinlock_t s_rsv_window_lock; | |
666 | struct rb_root s_rsv_window_root; | |
667 | struct ext3_reserve_window_node s_rsv_window_head; | |
668 | ||
669 | /* Journaling */ | |
670 | struct inode * s_journal_inode; | |
671 | struct journal_s * s_journal; | |
672 | struct list_head s_orphan; | |
673 | struct mutex s_orphan_lock; | |
674 | struct mutex s_resize_lock; | |
675 | unsigned long s_commit_interval; | |
676 | struct block_device *journal_bdev; | |
677 | #ifdef CONFIG_QUOTA | |
a93114e4 | 678 | char *s_qf_names[EXT3_MAXQUOTAS]; /* Names of quota files with journalled quota */ |
4613ad18 AV |
679 | int s_jquota_fmt; /* Format of quota to use */ |
680 | #endif | |
681 | }; | |
682 | ||
683 | static inline spinlock_t * | |
684 | sb_bgl_lock(struct ext3_sb_info *sbi, unsigned int block_group) | |
685 | { | |
686 | return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group); | |
687 | } | |
688 | ||
1da177e4 LT |
689 | static inline struct ext3_sb_info * EXT3_SB(struct super_block *sb) |
690 | { | |
691 | return sb->s_fs_info; | |
692 | } | |
693 | static inline struct ext3_inode_info *EXT3_I(struct inode *inode) | |
694 | { | |
695 | return container_of(inode, struct ext3_inode_info, vfs_inode); | |
696 | } | |
2ccb48eb NB |
697 | |
698 | static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino) | |
699 | { | |
700 | return ino == EXT3_ROOT_INO || | |
701 | ino == EXT3_JOURNAL_INO || | |
702 | ino == EXT3_RESIZE_INO || | |
703 | (ino >= EXT3_FIRST_INO(sb) && | |
704 | ino <= le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count)); | |
705 | } | |
9df93939 JK |
706 | |
707 | /* | |
708 | * Inode dynamic state flags | |
709 | */ | |
710 | enum { | |
711 | EXT3_STATE_JDATA, /* journaled data exists */ | |
712 | EXT3_STATE_NEW, /* inode is newly created */ | |
713 | EXT3_STATE_XATTR, /* has in-inode xattrs */ | |
714 | EXT3_STATE_FLUSH_ON_CLOSE, /* flush dirty pages on close */ | |
715 | }; | |
716 | ||
717 | static inline int ext3_test_inode_state(struct inode *inode, int bit) | |
718 | { | |
de329820 | 719 | return test_bit(bit, &EXT3_I(inode)->i_state_flags); |
9df93939 JK |
720 | } |
721 | ||
722 | static inline void ext3_set_inode_state(struct inode *inode, int bit) | |
723 | { | |
de329820 | 724 | set_bit(bit, &EXT3_I(inode)->i_state_flags); |
9df93939 JK |
725 | } |
726 | ||
727 | static inline void ext3_clear_inode_state(struct inode *inode, int bit) | |
728 | { | |
de329820 | 729 | clear_bit(bit, &EXT3_I(inode)->i_state_flags); |
9df93939 | 730 | } |
1da177e4 LT |
731 | |
732 | #define NEXT_ORPHAN(inode) EXT3_I(inode)->i_dtime | |
733 | ||
734 | /* | |
735 | * Codes for operating systems | |
736 | */ | |
737 | #define EXT3_OS_LINUX 0 | |
738 | #define EXT3_OS_HURD 1 | |
739 | #define EXT3_OS_MASIX 2 | |
740 | #define EXT3_OS_FREEBSD 3 | |
741 | #define EXT3_OS_LITES 4 | |
742 | ||
743 | /* | |
744 | * Revision levels | |
745 | */ | |
746 | #define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */ | |
747 | #define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ | |
748 | ||
749 | #define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV | |
750 | #define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV | |
751 | ||
752 | #define EXT3_GOOD_OLD_INODE_SIZE 128 | |
753 | ||
754 | /* | |
755 | * Feature set definitions | |
756 | */ | |
757 | ||
758 | #define EXT3_HAS_COMPAT_FEATURE(sb,mask) \ | |
759 | ( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) | |
760 | #define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \ | |
761 | ( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) | |
762 | #define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \ | |
763 | ( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) | |
764 | #define EXT3_SET_COMPAT_FEATURE(sb,mask) \ | |
765 | EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) | |
766 | #define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \ | |
767 | EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) | |
768 | #define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \ | |
769 | EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) | |
770 | #define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \ | |
771 | EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) | |
772 | #define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ | |
773 | EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) | |
774 | #define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \ | |
775 | EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) | |
776 | ||
777 | #define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001 | |
778 | #define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002 | |
779 | #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 | |
780 | #define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008 | |
781 | #define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010 | |
782 | #define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020 | |
783 | ||
784 | #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 | |
785 | #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 | |
786 | #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 | |
787 | ||
788 | #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001 | |
789 | #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002 | |
790 | #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ | |
791 | #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ | |
792 | #define EXT3_FEATURE_INCOMPAT_META_BG 0x0010 | |
793 | ||
794 | #define EXT3_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR | |
795 | #define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \ | |
796 | EXT3_FEATURE_INCOMPAT_RECOVER| \ | |
797 | EXT3_FEATURE_INCOMPAT_META_BG) | |
798 | #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \ | |
799 | EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
800 | EXT3_FEATURE_RO_COMPAT_BTREE_DIR) | |
801 | ||
802 | /* | |
803 | * Default values for user and/or group using reserved blocks | |
804 | */ | |
805 | #define EXT3_DEF_RESUID 0 | |
806 | #define EXT3_DEF_RESGID 0 | |
807 | ||
808 | /* | |
809 | * Default mount options | |
810 | */ | |
811 | #define EXT3_DEFM_DEBUG 0x0001 | |
812 | #define EXT3_DEFM_BSDGROUPS 0x0002 | |
813 | #define EXT3_DEFM_XATTR_USER 0x0004 | |
814 | #define EXT3_DEFM_ACL 0x0008 | |
815 | #define EXT3_DEFM_UID16 0x0010 | |
816 | #define EXT3_DEFM_JMODE 0x0060 | |
817 | #define EXT3_DEFM_JMODE_DATA 0x0020 | |
818 | #define EXT3_DEFM_JMODE_ORDERED 0x0040 | |
819 | #define EXT3_DEFM_JMODE_WBACK 0x0060 | |
820 | ||
821 | /* | |
822 | * Structure of a directory entry | |
823 | */ | |
824 | #define EXT3_NAME_LEN 255 | |
825 | ||
826 | struct ext3_dir_entry { | |
827 | __le32 inode; /* Inode number */ | |
828 | __le16 rec_len; /* Directory entry length */ | |
829 | __le16 name_len; /* Name length */ | |
830 | char name[EXT3_NAME_LEN]; /* File name */ | |
831 | }; | |
832 | ||
833 | /* | |
834 | * The new version of the directory entry. Since EXT3 structures are | |
835 | * stored in intel byte order, and the name_len field could never be | |
836 | * bigger than 255 chars, it's safe to reclaim the extra byte for the | |
837 | * file_type field. | |
838 | */ | |
839 | struct ext3_dir_entry_2 { | |
840 | __le32 inode; /* Inode number */ | |
841 | __le16 rec_len; /* Directory entry length */ | |
842 | __u8 name_len; /* Name length */ | |
843 | __u8 file_type; | |
844 | char name[EXT3_NAME_LEN]; /* File name */ | |
845 | }; | |
846 | ||
847 | /* | |
848 | * Ext3 directory file types. Only the low 3 bits are used. The | |
849 | * other bits are reserved for now. | |
850 | */ | |
851 | #define EXT3_FT_UNKNOWN 0 | |
852 | #define EXT3_FT_REG_FILE 1 | |
853 | #define EXT3_FT_DIR 2 | |
854 | #define EXT3_FT_CHRDEV 3 | |
855 | #define EXT3_FT_BLKDEV 4 | |
856 | #define EXT3_FT_FIFO 5 | |
857 | #define EXT3_FT_SOCK 6 | |
858 | #define EXT3_FT_SYMLINK 7 | |
859 | ||
860 | #define EXT3_FT_MAX 8 | |
861 | ||
862 | /* | |
863 | * EXT3_DIR_PAD defines the directory entries boundaries | |
864 | * | |
865 | * NOTE: It must be a multiple of 4 | |
866 | */ | |
867 | #define EXT3_DIR_PAD 4 | |
868 | #define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1) | |
869 | #define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \ | |
870 | ~EXT3_DIR_ROUND) | |
7c06a8dc JK |
871 | #define EXT3_MAX_REC_LEN ((1<<16)-1) |
872 | ||
a4ae3094 ES |
873 | /* |
874 | * Tests against MAX_REC_LEN etc were put in place for 64k block | |
875 | * sizes; if that is not possible on this arch, we can skip | |
876 | * those tests and speed things up. | |
877 | */ | |
7c06a8dc JK |
878 | static inline unsigned ext3_rec_len_from_disk(__le16 dlen) |
879 | { | |
880 | unsigned len = le16_to_cpu(dlen); | |
881 | ||
a4ae3094 | 882 | #if (PAGE_CACHE_SIZE >= 65536) |
7c06a8dc JK |
883 | if (len == EXT3_MAX_REC_LEN) |
884 | return 1 << 16; | |
a4ae3094 | 885 | #endif |
7c06a8dc JK |
886 | return len; |
887 | } | |
888 | ||
889 | static inline __le16 ext3_rec_len_to_disk(unsigned len) | |
890 | { | |
a4ae3094 | 891 | #if (PAGE_CACHE_SIZE >= 65536) |
7c06a8dc JK |
892 | if (len == (1 << 16)) |
893 | return cpu_to_le16(EXT3_MAX_REC_LEN); | |
894 | else if (len > (1 << 16)) | |
895 | BUG(); | |
a4ae3094 | 896 | #endif |
7c06a8dc JK |
897 | return cpu_to_le16(len); |
898 | } | |
899 | ||
1da177e4 LT |
900 | /* |
901 | * Hash Tree Directory indexing | |
902 | * (c) Daniel Phillips, 2001 | |
903 | */ | |
904 | ||
059590f4 ES |
905 | #define is_dx(dir) (EXT3_HAS_COMPAT_FEATURE(dir->i_sb, \ |
906 | EXT3_FEATURE_COMPAT_DIR_INDEX) && \ | |
1da177e4 LT |
907 | (EXT3_I(dir)->i_flags & EXT3_INDEX_FL)) |
908 | #define EXT3_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT3_LINK_MAX) | |
909 | #define EXT3_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) | |
1da177e4 LT |
910 | |
911 | /* Legal values for the dx_root hash_version field: */ | |
912 | ||
913 | #define DX_HASH_LEGACY 0 | |
914 | #define DX_HASH_HALF_MD4 1 | |
915 | #define DX_HASH_TEA 2 | |
5e1f8c9e TT |
916 | #define DX_HASH_LEGACY_UNSIGNED 3 |
917 | #define DX_HASH_HALF_MD4_UNSIGNED 4 | |
918 | #define DX_HASH_TEA_UNSIGNED 5 | |
1da177e4 LT |
919 | |
920 | /* hash info structure used by the directory hash */ | |
921 | struct dx_hash_info | |
922 | { | |
923 | u32 hash; | |
924 | u32 minor_hash; | |
925 | int hash_version; | |
926 | u32 *seed; | |
927 | }; | |
928 | ||
d7dab39b ES |
929 | |
930 | /* 32 and 64 bit signed EOF for dx directories */ | |
931 | #define EXT3_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) | |
932 | #define EXT3_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) | |
933 | ||
1da177e4 | 934 | |
1da177e4 LT |
935 | /* |
936 | * Control parameters used by ext3_htree_next_block | |
937 | */ | |
938 | #define HASH_NB_ALWAYS 1 | |
939 | ||
940 | ||
941 | /* | |
942 | * Describe an inode's exact location on disk and in memory | |
943 | */ | |
944 | struct ext3_iloc | |
945 | { | |
946 | struct buffer_head *bh; | |
947 | unsigned long offset; | |
948 | unsigned long block_group; | |
949 | }; | |
950 | ||
951 | static inline struct ext3_inode *ext3_raw_inode(struct ext3_iloc *iloc) | |
952 | { | |
953 | return (struct ext3_inode *) (iloc->bh->b_data + iloc->offset); | |
954 | } | |
955 | ||
956 | /* | |
957 | * This structure is stuffed into the struct file's private_data field | |
958 | * for directories. It is where we put information so that we can do | |
959 | * readdir operations in hash tree order. | |
960 | */ | |
961 | struct dir_private_info { | |
962 | struct rb_root root; | |
963 | struct rb_node *curr_node; | |
964 | struct fname *extra_fname; | |
965 | loff_t last_pos; | |
966 | __u32 curr_hash; | |
967 | __u32 curr_minor_hash; | |
968 | __u32 next_hash; | |
969 | }; | |
970 | ||
43d23f90 MC |
971 | /* calculate the first block number of the group */ |
972 | static inline ext3_fsblk_t | |
973 | ext3_group_first_block_no(struct super_block *sb, unsigned long group_no) | |
974 | { | |
975 | return group_no * (ext3_fsblk_t)EXT3_BLOCKS_PER_GROUP(sb) + | |
976 | le32_to_cpu(EXT3_SB(sb)->s_es->s_first_data_block); | |
977 | } | |
978 | ||
1da177e4 LT |
979 | /* |
980 | * Special error return code only used by dx_probe() and its callers. | |
981 | */ | |
982 | #define ERR_BAD_DX_DIR -75000 | |
983 | ||
984 | /* | |
985 | * Function prototypes | |
986 | */ | |
987 | ||
988 | /* | |
989 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
990 | * ext3 source programs needs to include it so they are duplicated here. | |
991 | */ | |
992 | # define NORET_TYPE /**/ | |
993 | # define ATTRIB_NORET __attribute__((noreturn)) | |
994 | # define NORET_AND noreturn, | |
995 | ||
996 | /* balloc.c */ | |
997 | extern int ext3_bg_has_super(struct super_block *sb, int group); | |
998 | extern unsigned long ext3_bg_num_gdb(struct super_block *sb, int group); | |
1c2bf374 MC |
999 | extern ext3_fsblk_t ext3_new_block (handle_t *handle, struct inode *inode, |
1000 | ext3_fsblk_t goal, int *errp); | |
1001 | extern ext3_fsblk_t ext3_new_blocks (handle_t *handle, struct inode *inode, | |
1002 | ext3_fsblk_t goal, unsigned long *count, int *errp); | |
1003 | extern void ext3_free_blocks (handle_t *handle, struct inode *inode, | |
1004 | ext3_fsblk_t block, unsigned long count); | |
1005 | extern void ext3_free_blocks_sb (handle_t *handle, struct super_block *sb, | |
1006 | ext3_fsblk_t block, unsigned long count, | |
1007 | unsigned long *pdquot_freed_blocks); | |
43d23f90 | 1008 | extern ext3_fsblk_t ext3_count_free_blocks (struct super_block *); |
1da177e4 LT |
1009 | extern void ext3_check_blocks_bitmap (struct super_block *); |
1010 | extern struct ext3_group_desc * ext3_get_group_desc(struct super_block * sb, | |
1011 | unsigned int block_group, | |
1012 | struct buffer_head ** bh); | |
1013 | extern int ext3_should_retry_alloc(struct super_block *sb, int *retries); | |
1014 | extern void ext3_init_block_alloc_info(struct inode *); | |
1015 | extern void ext3_rsv_window_add(struct super_block *sb, struct ext3_reserve_window_node *rsv); | |
b853b96b | 1016 | extern int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range); |
1da177e4 LT |
1017 | |
1018 | /* dir.c */ | |
1019 | extern int ext3_check_dir_entry(const char *, struct inode *, | |
1020 | struct ext3_dir_entry_2 *, | |
1021 | struct buffer_head *, unsigned long); | |
1022 | extern int ext3_htree_store_dirent(struct file *dir_file, __u32 hash, | |
1023 | __u32 minor_hash, | |
1024 | struct ext3_dir_entry_2 *dirent); | |
1025 | extern void ext3_htree_free_dir_info(struct dir_private_info *p); | |
1026 | ||
1027 | /* fsync.c */ | |
02c24a82 | 1028 | extern int ext3_sync_file(struct file *, loff_t, loff_t, int); |
1da177e4 LT |
1029 | |
1030 | /* hash.c */ | |
1031 | extern int ext3fs_dirhash(const char *name, int len, struct | |
1032 | dx_hash_info *hinfo); | |
1033 | ||
1034 | /* ialloc.c */ | |
2a7dba39 | 1035 | extern struct inode * ext3_new_inode (handle_t *, struct inode *, |
69b34f3a | 1036 | const struct qstr *, umode_t); |
1da177e4 LT |
1037 | extern void ext3_free_inode (handle_t *, struct inode *); |
1038 | extern struct inode * ext3_orphan_get (struct super_block *, unsigned long); | |
1039 | extern unsigned long ext3_count_free_inodes (struct super_block *); | |
1040 | extern unsigned long ext3_count_dirs (struct super_block *); | |
1041 | extern void ext3_check_inodes_bitmap (struct super_block *); | |
1042 | extern unsigned long ext3_count_free (struct buffer_head *, unsigned); | |
1043 | ||
1044 | ||
1045 | /* inode.c */ | |
1c2bf374 MC |
1046 | int ext3_forget(handle_t *handle, int is_metadata, struct inode *inode, |
1047 | struct buffer_head *bh, ext3_fsblk_t blocknr); | |
d8733c29 AM |
1048 | struct buffer_head * ext3_getblk (handle_t *, struct inode *, long, int, int *); |
1049 | struct buffer_head * ext3_bread (handle_t *, struct inode *, int, int, int *); | |
89747d36 MC |
1050 | int ext3_get_blocks_handle(handle_t *handle, struct inode *inode, |
1051 | sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, | |
43237b54 | 1052 | int create); |
1da177e4 | 1053 | |
473043dc | 1054 | extern struct inode *ext3_iget(struct super_block *, unsigned long); |
a9185b41 | 1055 | extern int ext3_write_inode (struct inode *, struct writeback_control *); |
1da177e4 | 1056 | extern int ext3_setattr (struct dentry *, struct iattr *); |
ac14a95b | 1057 | extern void ext3_evict_inode (struct inode *); |
1da177e4 LT |
1058 | extern int ext3_sync_inode (handle_t *, struct inode *); |
1059 | extern void ext3_discard_reservation (struct inode *); | |
aa385729 | 1060 | extern void ext3_dirty_inode(struct inode *, int); |
1da177e4 LT |
1061 | extern int ext3_change_inode_journal_flag(struct inode *, int); |
1062 | extern int ext3_get_inode_loc(struct inode *, struct ext3_iloc *); | |
ae76dd9a | 1063 | extern int ext3_can_truncate(struct inode *inode); |
40680f2f | 1064 | extern void ext3_truncate(struct inode *inode); |
1da177e4 | 1065 | extern void ext3_set_inode_flags(struct inode *); |
28be5abb | 1066 | extern void ext3_get_inode_flags(struct ext3_inode_info *); |
1da177e4 | 1067 | extern void ext3_set_aops(struct inode *inode); |
68c9d702 JB |
1068 | extern int ext3_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1069 | u64 start, u64 len); | |
1da177e4 LT |
1070 | |
1071 | /* ioctl.c */ | |
039fd8ce CM |
1072 | extern long ext3_ioctl(struct file *, unsigned int, unsigned long); |
1073 | extern long ext3_compat_ioctl(struct file *, unsigned int, unsigned long); | |
1da177e4 LT |
1074 | |
1075 | /* namei.c */ | |
1076 | extern int ext3_orphan_add(handle_t *, struct inode *); | |
1077 | extern int ext3_orphan_del(handle_t *, struct inode *); | |
1078 | extern int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash, | |
1079 | __u32 start_minor_hash, __u32 *next_hash); | |
1080 | ||
1081 | /* resize.c */ | |
1082 | extern int ext3_group_add(struct super_block *sb, | |
1083 | struct ext3_new_group_data *input); | |
1084 | extern int ext3_group_extend(struct super_block *sb, | |
1085 | struct ext3_super_block *es, | |
43d23f90 | 1086 | ext3_fsblk_t n_blocks_count); |
1da177e4 LT |
1087 | |
1088 | /* super.c */ | |
b9075fa9 JP |
1089 | extern __printf(3, 4) |
1090 | void ext3_error(struct super_block *, const char *, const char *, ...); | |
1da177e4 | 1091 | extern void __ext3_std_error (struct super_block *, const char *, int); |
b9075fa9 JP |
1092 | extern __printf(3, 4) |
1093 | void ext3_abort(struct super_block *, const char *, const char *, ...); | |
1094 | extern __printf(3, 4) | |
1095 | void ext3_warning(struct super_block *, const char *, const char *, ...); | |
1096 | extern __printf(3, 4) | |
1097 | void ext3_msg(struct super_block *, const char *, const char *, ...); | |
1da177e4 LT |
1098 | extern void ext3_update_dynamic_rev (struct super_block *sb); |
1099 | ||
1100 | #define ext3_std_error(sb, errno) \ | |
1101 | do { \ | |
1102 | if ((errno)) \ | |
d5c003b4 | 1103 | __ext3_std_error((sb), __func__, (errno)); \ |
1da177e4 LT |
1104 | } while (0) |
1105 | ||
1106 | /* | |
1107 | * Inodes and files operations | |
1108 | */ | |
1109 | ||
1110 | /* dir.c */ | |
4b6f5d20 | 1111 | extern const struct file_operations ext3_dir_operations; |
1da177e4 LT |
1112 | |
1113 | /* file.c */ | |
c5ef1c42 | 1114 | extern const struct inode_operations ext3_file_inode_operations; |
4b6f5d20 | 1115 | extern const struct file_operations ext3_file_operations; |
1da177e4 LT |
1116 | |
1117 | /* namei.c */ | |
c5ef1c42 AV |
1118 | extern const struct inode_operations ext3_dir_inode_operations; |
1119 | extern const struct inode_operations ext3_special_inode_operations; | |
1da177e4 LT |
1120 | |
1121 | /* symlink.c */ | |
c5ef1c42 AV |
1122 | extern const struct inode_operations ext3_symlink_inode_operations; |
1123 | extern const struct inode_operations ext3_fast_symlink_inode_operations; | |
1da177e4 | 1124 | |
4613ad18 AV |
1125 | #define EXT3_JOURNAL(inode) (EXT3_SB((inode)->i_sb)->s_journal) |
1126 | ||
1127 | /* Define the number of blocks we need to account to a transaction to | |
1128 | * modify one block of data. | |
1129 | * | |
1130 | * We may have to touch one inode, one bitmap buffer, up to three | |
1131 | * indirection blocks, the group and superblock summaries, and the data | |
1132 | * block to complete the transaction. */ | |
1133 | ||
1134 | #define EXT3_SINGLEDATA_TRANS_BLOCKS 8U | |
1135 | ||
1136 | /* Extended attribute operations touch at most two data buffers, | |
1137 | * two bitmap buffers, and two group summaries, in addition to the inode | |
1138 | * and the superblock, which are already accounted for. */ | |
1139 | ||
1140 | #define EXT3_XATTR_TRANS_BLOCKS 6U | |
1141 | ||
1142 | /* Define the minimum size for a transaction which modifies data. This | |
1143 | * needs to take into account the fact that we may end up modifying two | |
1144 | * quota files too (one for the group, one for the user quota). The | |
1145 | * superblock only gets updated once, of course, so don't bother | |
1146 | * counting that again for the quota updates. */ | |
1147 | ||
1148 | #define EXT3_DATA_TRANS_BLOCKS(sb) (EXT3_SINGLEDATA_TRANS_BLOCKS + \ | |
1149 | EXT3_XATTR_TRANS_BLOCKS - 2 + \ | |
1150 | EXT3_MAXQUOTAS_TRANS_BLOCKS(sb)) | |
1151 | ||
1152 | /* Delete operations potentially hit one directory's namespace plus an | |
1153 | * entire inode, plus arbitrary amounts of bitmap/indirection data. Be | |
1154 | * generous. We can grow the delete transaction later if necessary. */ | |
1155 | ||
1156 | #define EXT3_DELETE_TRANS_BLOCKS(sb) (EXT3_MAXQUOTAS_TRANS_BLOCKS(sb) + 64) | |
1157 | ||
1158 | /* Define an arbitrary limit for the amount of data we will anticipate | |
1159 | * writing to any given transaction. For unbounded transactions such as | |
1160 | * write(2) and truncate(2) we can write more than this, but we always | |
1161 | * start off at the maximum transaction size and grow the transaction | |
1162 | * optimistically as we go. */ | |
1163 | ||
1164 | #define EXT3_MAX_TRANS_DATA 64U | |
1165 | ||
1166 | /* We break up a large truncate or write transaction once the handle's | |
1167 | * buffer credits gets this low, we need either to extend the | |
1168 | * transaction or to start a new one. Reserve enough space here for | |
1169 | * inode, bitmap, superblock, group and indirection updates for at least | |
1170 | * one block, plus two quota updates. Quota allocations are not | |
1171 | * needed. */ | |
1172 | ||
1173 | #define EXT3_RESERVE_TRANS_BLOCKS 12U | |
1174 | ||
1175 | #define EXT3_INDEX_EXTRA_TRANS_BLOCKS 8 | |
1176 | ||
1177 | #ifdef CONFIG_QUOTA | |
1178 | /* Amount of blocks needed for quota update - we know that the structure was | |
1179 | * allocated so we need to update only inode+data */ | |
1180 | #define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0) | |
1181 | /* Amount of blocks needed for quota insert/delete - we do some block writes | |
1182 | * but inode, sb and group updates are done only once */ | |
1183 | #define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\ | |
1184 | (EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0) | |
1185 | #define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\ | |
1186 | (EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0) | |
1187 | #else | |
1188 | #define EXT3_QUOTA_TRANS_BLOCKS(sb) 0 | |
1189 | #define EXT3_QUOTA_INIT_BLOCKS(sb) 0 | |
1190 | #define EXT3_QUOTA_DEL_BLOCKS(sb) 0 | |
1191 | #endif | |
a93114e4 JK |
1192 | #define EXT3_MAXQUOTAS_TRANS_BLOCKS(sb) (EXT3_MAXQUOTAS*EXT3_QUOTA_TRANS_BLOCKS(sb)) |
1193 | #define EXT3_MAXQUOTAS_INIT_BLOCKS(sb) (EXT3_MAXQUOTAS*EXT3_QUOTA_INIT_BLOCKS(sb)) | |
1194 | #define EXT3_MAXQUOTAS_DEL_BLOCKS(sb) (EXT3_MAXQUOTAS*EXT3_QUOTA_DEL_BLOCKS(sb)) | |
4613ad18 AV |
1195 | |
1196 | int | |
1197 | ext3_mark_iloc_dirty(handle_t *handle, | |
1198 | struct inode *inode, | |
1199 | struct ext3_iloc *iloc); | |
1200 | ||
1201 | /* | |
1202 | * On success, We end up with an outstanding reference count against | |
1203 | * iloc->bh. This _must_ be cleaned up later. | |
1204 | */ | |
1205 | ||
1206 | int ext3_reserve_inode_write(handle_t *handle, struct inode *inode, | |
1207 | struct ext3_iloc *iloc); | |
1208 | ||
1209 | int ext3_mark_inode_dirty(handle_t *handle, struct inode *inode); | |
1210 | ||
1211 | /* | |
1212 | * Wrapper functions with which ext3 calls into JBD. The intent here is | |
1213 | * to allow these to be turned into appropriate stubs so ext3 can control | |
1214 | * ext2 filesystems, so ext2+ext3 systems only nee one fs. This work hasn't | |
1215 | * been done yet. | |
1216 | */ | |
1217 | ||
1218 | static inline void ext3_journal_release_buffer(handle_t *handle, | |
1219 | struct buffer_head *bh) | |
1220 | { | |
1221 | journal_release_buffer(handle, bh); | |
1222 | } | |
1223 | ||
1224 | void ext3_journal_abort_handle(const char *caller, const char *err_fn, | |
1225 | struct buffer_head *bh, handle_t *handle, int err); | |
1226 | ||
1227 | int __ext3_journal_get_undo_access(const char *where, handle_t *handle, | |
1228 | struct buffer_head *bh); | |
1229 | ||
1230 | int __ext3_journal_get_write_access(const char *where, handle_t *handle, | |
1231 | struct buffer_head *bh); | |
1232 | ||
1233 | int __ext3_journal_forget(const char *where, handle_t *handle, | |
1234 | struct buffer_head *bh); | |
1da177e4 | 1235 | |
4613ad18 AV |
1236 | int __ext3_journal_revoke(const char *where, handle_t *handle, |
1237 | unsigned long blocknr, struct buffer_head *bh); | |
1238 | ||
1239 | int __ext3_journal_get_create_access(const char *where, | |
1240 | handle_t *handle, struct buffer_head *bh); | |
1241 | ||
1242 | int __ext3_journal_dirty_metadata(const char *where, | |
1243 | handle_t *handle, struct buffer_head *bh); | |
1244 | ||
1245 | #define ext3_journal_get_undo_access(handle, bh) \ | |
1246 | __ext3_journal_get_undo_access(__func__, (handle), (bh)) | |
1247 | #define ext3_journal_get_write_access(handle, bh) \ | |
1248 | __ext3_journal_get_write_access(__func__, (handle), (bh)) | |
1249 | #define ext3_journal_revoke(handle, blocknr, bh) \ | |
1250 | __ext3_journal_revoke(__func__, (handle), (blocknr), (bh)) | |
1251 | #define ext3_journal_get_create_access(handle, bh) \ | |
1252 | __ext3_journal_get_create_access(__func__, (handle), (bh)) | |
1253 | #define ext3_journal_dirty_metadata(handle, bh) \ | |
1254 | __ext3_journal_dirty_metadata(__func__, (handle), (bh)) | |
1255 | #define ext3_journal_forget(handle, bh) \ | |
1256 | __ext3_journal_forget(__func__, (handle), (bh)) | |
1257 | ||
1258 | int ext3_journal_dirty_data(handle_t *handle, struct buffer_head *bh); | |
1259 | ||
1260 | handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks); | |
1261 | int __ext3_journal_stop(const char *where, handle_t *handle); | |
1262 | ||
1263 | static inline handle_t *ext3_journal_start(struct inode *inode, int nblocks) | |
1264 | { | |
1265 | return ext3_journal_start_sb(inode->i_sb, nblocks); | |
1266 | } | |
1267 | ||
1268 | #define ext3_journal_stop(handle) \ | |
1269 | __ext3_journal_stop(__func__, (handle)) | |
1270 | ||
1271 | static inline handle_t *ext3_journal_current_handle(void) | |
1272 | { | |
1273 | return journal_current_handle(); | |
1274 | } | |
1275 | ||
1276 | static inline int ext3_journal_extend(handle_t *handle, int nblocks) | |
1277 | { | |
1278 | return journal_extend(handle, nblocks); | |
1279 | } | |
1280 | ||
1281 | static inline int ext3_journal_restart(handle_t *handle, int nblocks) | |
1282 | { | |
1283 | return journal_restart(handle, nblocks); | |
1284 | } | |
1285 | ||
1286 | static inline int ext3_journal_blocks_per_page(struct inode *inode) | |
1287 | { | |
1288 | return journal_blocks_per_page(inode); | |
1289 | } | |
1290 | ||
1291 | static inline int ext3_journal_force_commit(journal_t *journal) | |
1292 | { | |
1293 | return journal_force_commit(journal); | |
1294 | } | |
1295 | ||
1296 | /* super.c */ | |
1297 | int ext3_force_commit(struct super_block *sb); | |
1298 | ||
1299 | static inline int ext3_should_journal_data(struct inode *inode) | |
1300 | { | |
1301 | if (!S_ISREG(inode->i_mode)) | |
1302 | return 1; | |
1303 | if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA) | |
1304 | return 1; | |
1305 | if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL) | |
1306 | return 1; | |
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | static inline int ext3_should_order_data(struct inode *inode) | |
1311 | { | |
1312 | if (!S_ISREG(inode->i_mode)) | |
1313 | return 0; | |
1314 | if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL) | |
1315 | return 0; | |
1316 | if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA) | |
1317 | return 1; | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | static inline int ext3_should_writeback_data(struct inode *inode) | |
1322 | { | |
1323 | if (!S_ISREG(inode->i_mode)) | |
1324 | return 0; | |
1325 | if (EXT3_I(inode)->i_flags & EXT3_JOURNAL_DATA_FL) | |
1326 | return 0; | |
1327 | if (test_opt(inode->i_sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA) | |
1328 | return 1; | |
1329 | return 0; | |
1330 | } | |
1da177e4 | 1331 | |
4613ad18 | 1332 | #include <trace/events/ext3.h> |