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Commit | Line | Data |
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ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/include/linux/ext4_fs.h |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/include/linux/minix_fs.h | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | */ | |
15 | ||
617ba13b MC |
16 | #ifndef _LINUX_EXT4_FS_H |
17 | #define _LINUX_EXT4_FS_H | |
ac27a0ec DK |
18 | |
19 | #include <linux/types.h> | |
3a5b2ecd | 20 | #include <linux/blkdev.h> |
ac27a0ec DK |
21 | #include <linux/magic.h> |
22 | ||
23 | /* | |
24 | * The second extended filesystem constants/structures | |
25 | */ | |
26 | ||
27 | /* | |
617ba13b | 28 | * Define EXT4FS_DEBUG to produce debug messages |
ac27a0ec | 29 | */ |
617ba13b | 30 | #undef EXT4FS_DEBUG |
ac27a0ec DK |
31 | |
32 | /* | |
617ba13b | 33 | * Define EXT4_RESERVATION to reserve data blocks for expanding files |
ac27a0ec | 34 | */ |
617ba13b | 35 | #define EXT4_DEFAULT_RESERVE_BLOCKS 8 |
ac27a0ec | 36 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
617ba13b MC |
37 | #define EXT4_MAX_RESERVE_BLOCKS 1027 |
38 | #define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0 | |
ac27a0ec DK |
39 | /* |
40 | * Always enable hashed directories | |
41 | */ | |
617ba13b | 42 | #define CONFIG_EXT4_INDEX |
ac27a0ec DK |
43 | |
44 | /* | |
45 | * Debug code | |
46 | */ | |
617ba13b MC |
47 | #ifdef EXT4FS_DEBUG |
48 | #define ext4_debug(f, a...) \ | |
ac27a0ec | 49 | do { \ |
617ba13b | 50 | printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
ac27a0ec DK |
51 | __FILE__, __LINE__, __FUNCTION__); \ |
52 | printk (KERN_DEBUG f, ## a); \ | |
53 | } while (0) | |
54 | #else | |
617ba13b | 55 | #define ext4_debug(f, a...) do {} while (0) |
ac27a0ec DK |
56 | #endif |
57 | ||
58 | /* | |
59 | * Special inodes numbers | |
60 | */ | |
617ba13b MC |
61 | #define EXT4_BAD_INO 1 /* Bad blocks inode */ |
62 | #define EXT4_ROOT_INO 2 /* Root inode */ | |
63 | #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ | |
64 | #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ | |
65 | #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ | |
66 | #define EXT4_JOURNAL_INO 8 /* Journal inode */ | |
ac27a0ec | 67 | |
617ba13b MC |
68 | /* First non-reserved inode for old ext4 filesystems */ |
69 | #define EXT4_GOOD_OLD_FIRST_INO 11 | |
ac27a0ec DK |
70 | |
71 | /* | |
72 | * Maximal count of links to a file | |
73 | */ | |
617ba13b | 74 | #define EXT4_LINK_MAX 32000 |
ac27a0ec DK |
75 | |
76 | /* | |
77 | * Macro-instructions used to manage several block sizes | |
78 | */ | |
617ba13b MC |
79 | #define EXT4_MIN_BLOCK_SIZE 1024 |
80 | #define EXT4_MAX_BLOCK_SIZE 4096 | |
81 | #define EXT4_MIN_BLOCK_LOG_SIZE 10 | |
ac27a0ec | 82 | #ifdef __KERNEL__ |
617ba13b | 83 | # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
ac27a0ec | 84 | #else |
617ba13b | 85 | # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
ac27a0ec | 86 | #endif |
617ba13b | 87 | #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof (__u32)) |
ac27a0ec | 88 | #ifdef __KERNEL__ |
617ba13b | 89 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
ac27a0ec | 90 | #else |
617ba13b | 91 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
ac27a0ec DK |
92 | #endif |
93 | #ifdef __KERNEL__ | |
617ba13b MC |
94 | #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) |
95 | #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) | |
96 | #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) | |
ac27a0ec | 97 | #else |
617ba13b MC |
98 | #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
99 | EXT4_GOOD_OLD_INODE_SIZE : \ | |
ac27a0ec | 100 | (s)->s_inode_size) |
617ba13b MC |
101 | #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
102 | EXT4_GOOD_OLD_FIRST_INO : \ | |
ac27a0ec DK |
103 | (s)->s_first_ino) |
104 | #endif | |
105 | ||
106 | /* | |
107 | * Macro-instructions used to manage fragments | |
108 | */ | |
617ba13b MC |
109 | #define EXT4_MIN_FRAG_SIZE 1024 |
110 | #define EXT4_MAX_FRAG_SIZE 4096 | |
111 | #define EXT4_MIN_FRAG_LOG_SIZE 10 | |
ac27a0ec | 112 | #ifdef __KERNEL__ |
617ba13b MC |
113 | # define EXT4_FRAG_SIZE(s) (EXT4_SB(s)->s_frag_size) |
114 | # define EXT4_FRAGS_PER_BLOCK(s) (EXT4_SB(s)->s_frags_per_block) | |
ac27a0ec | 115 | #else |
617ba13b MC |
116 | # define EXT4_FRAG_SIZE(s) (EXT4_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
117 | # define EXT4_FRAGS_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_FRAG_SIZE(s)) | |
ac27a0ec DK |
118 | #endif |
119 | ||
120 | /* | |
121 | * Structure of a blocks group descriptor | |
122 | */ | |
617ba13b | 123 | struct ext4_group_desc |
ac27a0ec DK |
124 | { |
125 | __le32 bg_block_bitmap; /* Blocks bitmap block */ | |
126 | __le32 bg_inode_bitmap; /* Inodes bitmap block */ | |
127 | __le32 bg_inode_table; /* Inodes table block */ | |
128 | __le16 bg_free_blocks_count; /* Free blocks count */ | |
129 | __le16 bg_free_inodes_count; /* Free inodes count */ | |
130 | __le16 bg_used_dirs_count; /* Directories count */ | |
bd81d8ee LV |
131 | __u16 bg_flags; |
132 | __le16 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ | |
133 | __le16 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ | |
134 | __le16 bg_inode_table_hi; /* Inodes table block MSB */ | |
135 | __u16 bg_reserved[3]; | |
ac27a0ec DK |
136 | }; |
137 | ||
bd81d8ee LV |
138 | #ifdef __KERNEL__ |
139 | #include <linux/ext4_fs_i.h> | |
140 | #include <linux/ext4_fs_sb.h> | |
141 | #endif | |
ac27a0ec DK |
142 | /* |
143 | * Macro-instructions used to manage group descriptors | |
144 | */ | |
0d1ee42f AR |
145 | #define EXT4_MIN_DESC_SIZE 32 |
146 | #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE | |
147 | #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) | |
ac27a0ec | 148 | #ifdef __KERNEL__ |
617ba13b MC |
149 | # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) |
150 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) | |
151 | # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) | |
152 | # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) | |
ac27a0ec | 153 | #else |
617ba13b | 154 | # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
0d1ee42f | 155 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) |
617ba13b | 156 | # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
ac27a0ec DK |
157 | #endif |
158 | ||
159 | /* | |
160 | * Constants relative to the data blocks | |
161 | */ | |
617ba13b MC |
162 | #define EXT4_NDIR_BLOCKS 12 |
163 | #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS | |
164 | #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) | |
165 | #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) | |
166 | #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) | |
ac27a0ec DK |
167 | |
168 | /* | |
169 | * Inode flags | |
170 | */ | |
617ba13b MC |
171 | #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ |
172 | #define EXT4_UNRM_FL 0x00000002 /* Undelete */ | |
173 | #define EXT4_COMPR_FL 0x00000004 /* Compress file */ | |
174 | #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ | |
175 | #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
176 | #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ | |
177 | #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ | |
178 | #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ | |
ac27a0ec | 179 | /* Reserved for compression usage... */ |
617ba13b MC |
180 | #define EXT4_DIRTY_FL 0x00000100 |
181 | #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
182 | #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ | |
183 | #define EXT4_ECOMPR_FL 0x00000800 /* Compression error */ | |
ac27a0ec | 184 | /* End compression flags --- maybe not all used */ |
617ba13b MC |
185 | #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ |
186 | #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ | |
187 | #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ | |
188 | #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
189 | #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
190 | #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
191 | #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ | |
a86c6181 | 192 | #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
ac27a0ec | 193 | |
a86c6181 | 194 | #define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ |
617ba13b | 195 | #define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ |
ac27a0ec DK |
196 | |
197 | /* | |
198 | * Inode dynamic state flags | |
199 | */ | |
617ba13b MC |
200 | #define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */ |
201 | #define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ | |
202 | #define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ | |
ac27a0ec DK |
203 | |
204 | /* Used to pass group descriptor data when online resize is done */ | |
617ba13b | 205 | struct ext4_new_group_input { |
ac27a0ec | 206 | __u32 group; /* Group number for this data */ |
bd81d8ee LV |
207 | __u64 block_bitmap; /* Absolute block number of block bitmap */ |
208 | __u64 inode_bitmap; /* Absolute block number of inode bitmap */ | |
209 | __u64 inode_table; /* Absolute block number of inode table start */ | |
ac27a0ec DK |
210 | __u32 blocks_count; /* Total number of blocks in this group */ |
211 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
212 | __u16 unused; | |
213 | }; | |
214 | ||
617ba13b MC |
215 | /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ |
216 | struct ext4_new_group_data { | |
ac27a0ec | 217 | __u32 group; |
bd81d8ee LV |
218 | __u64 block_bitmap; |
219 | __u64 inode_bitmap; | |
220 | __u64 inode_table; | |
ac27a0ec DK |
221 | __u32 blocks_count; |
222 | __u16 reserved_blocks; | |
223 | __u16 unused; | |
224 | __u32 free_blocks_count; | |
225 | }; | |
226 | ||
227 | ||
228 | /* | |
229 | * ioctl commands | |
230 | */ | |
617ba13b MC |
231 | #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS |
232 | #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS | |
233 | #define EXT4_IOC_GETVERSION _IOR('f', 3, long) | |
234 | #define EXT4_IOC_SETVERSION _IOW('f', 4, long) | |
235 | #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) | |
236 | #define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input) | |
237 | #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION | |
238 | #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION | |
ac27a0ec | 239 | #ifdef CONFIG_JBD_DEBUG |
617ba13b | 240 | #define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
ac27a0ec | 241 | #endif |
617ba13b MC |
242 | #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) |
243 | #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) | |
ac27a0ec DK |
244 | |
245 | /* | |
246 | * ioctl commands in 32 bit emulation | |
247 | */ | |
617ba13b MC |
248 | #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
249 | #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS | |
250 | #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) | |
251 | #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) | |
252 | #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) | |
253 | #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) | |
254 | #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | |
ac27a0ec | 255 | #ifdef CONFIG_JBD_DEBUG |
617ba13b | 256 | #define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
ac27a0ec | 257 | #endif |
617ba13b MC |
258 | #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
259 | #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | |
ac27a0ec DK |
260 | |
261 | ||
262 | /* | |
263 | * Mount options | |
264 | */ | |
617ba13b | 265 | struct ext4_mount_options { |
ac27a0ec DK |
266 | unsigned long s_mount_opt; |
267 | uid_t s_resuid; | |
268 | gid_t s_resgid; | |
269 | unsigned long s_commit_interval; | |
270 | #ifdef CONFIG_QUOTA | |
271 | int s_jquota_fmt; | |
272 | char *s_qf_names[MAXQUOTAS]; | |
273 | #endif | |
274 | }; | |
275 | ||
276 | /* | |
277 | * Structure of an inode on the disk | |
278 | */ | |
617ba13b | 279 | struct ext4_inode { |
ac27a0ec DK |
280 | __le16 i_mode; /* File mode */ |
281 | __le16 i_uid; /* Low 16 bits of Owner Uid */ | |
282 | __le32 i_size; /* Size in bytes */ | |
283 | __le32 i_atime; /* Access time */ | |
284 | __le32 i_ctime; /* Creation time */ | |
285 | __le32 i_mtime; /* Modification time */ | |
286 | __le32 i_dtime; /* Deletion Time */ | |
287 | __le16 i_gid; /* Low 16 bits of Group Id */ | |
288 | __le16 i_links_count; /* Links count */ | |
289 | __le32 i_blocks; /* Blocks count */ | |
290 | __le32 i_flags; /* File flags */ | |
291 | union { | |
292 | struct { | |
293 | __u32 l_i_reserved1; | |
294 | } linux1; | |
295 | struct { | |
296 | __u32 h_i_translator; | |
297 | } hurd1; | |
298 | struct { | |
299 | __u32 m_i_reserved1; | |
300 | } masix1; | |
301 | } osd1; /* OS dependent 1 */ | |
617ba13b | 302 | __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
ac27a0ec DK |
303 | __le32 i_generation; /* File version (for NFS) */ |
304 | __le32 i_file_acl; /* File ACL */ | |
305 | __le32 i_dir_acl; /* Directory ACL */ | |
306 | __le32 i_faddr; /* Fragment address */ | |
307 | union { | |
308 | struct { | |
309 | __u8 l_i_frag; /* Fragment number */ | |
310 | __u8 l_i_fsize; /* Fragment size */ | |
a1ddeb7e | 311 | __le16 l_i_file_acl_high; |
ac27a0ec DK |
312 | __le16 l_i_uid_high; /* these 2 fields */ |
313 | __le16 l_i_gid_high; /* were reserved2[0] */ | |
314 | __u32 l_i_reserved2; | |
315 | } linux2; | |
316 | struct { | |
317 | __u8 h_i_frag; /* Fragment number */ | |
318 | __u8 h_i_fsize; /* Fragment size */ | |
319 | __u16 h_i_mode_high; | |
320 | __u16 h_i_uid_high; | |
321 | __u16 h_i_gid_high; | |
322 | __u32 h_i_author; | |
323 | } hurd2; | |
324 | struct { | |
325 | __u8 m_i_frag; /* Fragment number */ | |
326 | __u8 m_i_fsize; /* Fragment size */ | |
a1ddeb7e | 327 | __le16 m_i_file_acl_high; |
ac27a0ec DK |
328 | __u32 m_i_reserved2[2]; |
329 | } masix2; | |
330 | } osd2; /* OS dependent 2 */ | |
331 | __le16 i_extra_isize; | |
332 | __le16 i_pad1; | |
333 | }; | |
334 | ||
335 | #define i_size_high i_dir_acl | |
336 | ||
337 | #if defined(__KERNEL__) || defined(__linux__) | |
338 | #define i_reserved1 osd1.linux1.l_i_reserved1 | |
339 | #define i_frag osd2.linux2.l_i_frag | |
340 | #define i_fsize osd2.linux2.l_i_fsize | |
a1ddeb7e | 341 | #define i_file_acl_high osd2.linux2.l_i_file_acl_high |
ac27a0ec DK |
342 | #define i_uid_low i_uid |
343 | #define i_gid_low i_gid | |
344 | #define i_uid_high osd2.linux2.l_i_uid_high | |
345 | #define i_gid_high osd2.linux2.l_i_gid_high | |
346 | #define i_reserved2 osd2.linux2.l_i_reserved2 | |
347 | ||
348 | #elif defined(__GNU__) | |
349 | ||
350 | #define i_translator osd1.hurd1.h_i_translator | |
351 | #define i_frag osd2.hurd2.h_i_frag; | |
352 | #define i_fsize osd2.hurd2.h_i_fsize; | |
353 | #define i_uid_high osd2.hurd2.h_i_uid_high | |
354 | #define i_gid_high osd2.hurd2.h_i_gid_high | |
355 | #define i_author osd2.hurd2.h_i_author | |
356 | ||
357 | #elif defined(__masix__) | |
358 | ||
359 | #define i_reserved1 osd1.masix1.m_i_reserved1 | |
360 | #define i_frag osd2.masix2.m_i_frag | |
361 | #define i_fsize osd2.masix2.m_i_fsize | |
a1ddeb7e | 362 | #define i_file_acl_high osd2.masix2.m_i_file_acl_high |
ac27a0ec DK |
363 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
364 | ||
365 | #endif /* defined(__KERNEL__) || defined(__linux__) */ | |
366 | ||
367 | /* | |
368 | * File system states | |
369 | */ | |
617ba13b MC |
370 | #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ |
371 | #define EXT4_ERROR_FS 0x0002 /* Errors detected */ | |
372 | #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ | |
ac27a0ec DK |
373 | |
374 | /* | |
375 | * Mount flags | |
376 | */ | |
617ba13b MC |
377 | #define EXT4_MOUNT_CHECK 0x00001 /* Do mount-time checks */ |
378 | #define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ | |
379 | #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ | |
380 | #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ | |
381 | #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ | |
382 | #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ | |
383 | #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ | |
384 | #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ | |
385 | #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ | |
386 | #define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */ | |
387 | #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ | |
388 | #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ | |
389 | #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ | |
390 | #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ | |
391 | #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ | |
392 | #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ | |
393 | #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ | |
394 | #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ | |
395 | #define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ | |
396 | #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ | |
397 | #define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ | |
398 | #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ | |
399 | #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ | |
400 | #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ | |
a86c6181 | 401 | #define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */ |
617ba13b MC |
402 | |
403 | /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ | |
ac27a0ec | 404 | #ifndef _LINUX_EXT2_FS_H |
617ba13b MC |
405 | #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt |
406 | #define set_opt(o, opt) o |= EXT4_MOUNT_##opt | |
407 | #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ | |
408 | EXT4_MOUNT_##opt) | |
ac27a0ec | 409 | #else |
617ba13b MC |
410 | #define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD |
411 | #define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT | |
412 | #define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS | |
ac27a0ec DK |
413 | #endif |
414 | ||
617ba13b MC |
415 | #define ext4_set_bit ext2_set_bit |
416 | #define ext4_set_bit_atomic ext2_set_bit_atomic | |
417 | #define ext4_clear_bit ext2_clear_bit | |
418 | #define ext4_clear_bit_atomic ext2_clear_bit_atomic | |
419 | #define ext4_test_bit ext2_test_bit | |
420 | #define ext4_find_first_zero_bit ext2_find_first_zero_bit | |
421 | #define ext4_find_next_zero_bit ext2_find_next_zero_bit | |
ac27a0ec DK |
422 | |
423 | /* | |
424 | * Maximal mount counts between two filesystem checks | |
425 | */ | |
617ba13b MC |
426 | #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
427 | #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ | |
ac27a0ec DK |
428 | |
429 | /* | |
430 | * Behaviour when detecting errors | |
431 | */ | |
617ba13b MC |
432 | #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ |
433 | #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ | |
434 | #define EXT4_ERRORS_PANIC 3 /* Panic */ | |
435 | #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE | |
ac27a0ec DK |
436 | |
437 | /* | |
438 | * Structure of the super block | |
439 | */ | |
617ba13b | 440 | struct ext4_super_block { |
ac27a0ec DK |
441 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
442 | __le32 s_blocks_count; /* Blocks count */ | |
443 | __le32 s_r_blocks_count; /* Reserved blocks count */ | |
444 | __le32 s_free_blocks_count; /* Free blocks count */ | |
445 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ | |
446 | __le32 s_first_data_block; /* First Data Block */ | |
447 | __le32 s_log_block_size; /* Block size */ | |
448 | __le32 s_log_frag_size; /* Fragment size */ | |
449 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ | |
450 | __le32 s_frags_per_group; /* # Fragments per group */ | |
451 | __le32 s_inodes_per_group; /* # Inodes per group */ | |
452 | __le32 s_mtime; /* Mount time */ | |
453 | /*30*/ __le32 s_wtime; /* Write time */ | |
454 | __le16 s_mnt_count; /* Mount count */ | |
455 | __le16 s_max_mnt_count; /* Maximal mount count */ | |
456 | __le16 s_magic; /* Magic signature */ | |
457 | __le16 s_state; /* File system state */ | |
458 | __le16 s_errors; /* Behaviour when detecting errors */ | |
459 | __le16 s_minor_rev_level; /* minor revision level */ | |
460 | /*40*/ __le32 s_lastcheck; /* time of last check */ | |
461 | __le32 s_checkinterval; /* max. time between checks */ | |
462 | __le32 s_creator_os; /* OS */ | |
463 | __le32 s_rev_level; /* Revision level */ | |
464 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ | |
465 | __le16 s_def_resgid; /* Default gid for reserved blocks */ | |
466 | /* | |
617ba13b | 467 | * These fields are for EXT4_DYNAMIC_REV superblocks only. |
ac27a0ec DK |
468 | * |
469 | * Note: the difference between the compatible feature set and | |
470 | * the incompatible feature set is that if there is a bit set | |
471 | * in the incompatible feature set that the kernel doesn't | |
472 | * know about, it should refuse to mount the filesystem. | |
473 | * | |
474 | * e2fsck's requirements are more strict; if it doesn't know | |
475 | * about a feature in either the compatible or incompatible | |
476 | * feature set, it must abort and not try to meddle with | |
477 | * things it doesn't understand... | |
478 | */ | |
479 | __le32 s_first_ino; /* First non-reserved inode */ | |
0d1ee42f | 480 | __le16 s_inode_size; /* size of inode structure */ |
ac27a0ec DK |
481 | __le16 s_block_group_nr; /* block group # of this superblock */ |
482 | __le32 s_feature_compat; /* compatible feature set */ | |
483 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ | |
484 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ | |
485 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ | |
486 | /*78*/ char s_volume_name[16]; /* volume name */ | |
487 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ | |
488 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ | |
489 | /* | |
490 | * Performance hints. Directory preallocation should only | |
617ba13b | 491 | * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
ac27a0ec DK |
492 | */ |
493 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ | |
494 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ | |
495 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ | |
496 | /* | |
617ba13b | 497 | * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
ac27a0ec DK |
498 | */ |
499 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ | |
500 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ | |
501 | __le32 s_journal_dev; /* device number of journal file */ | |
502 | __le32 s_last_orphan; /* start of list of inodes to delete */ | |
503 | __le32 s_hash_seed[4]; /* HTREE hash seed */ | |
504 | __u8 s_def_hash_version; /* Default hash version to use */ | |
505 | __u8 s_reserved_char_pad; | |
0d1ee42f | 506 | __le16 s_desc_size; /* size of group descriptor */ |
bd81d8ee | 507 | /*100*/ __le32 s_default_mount_opts; |
ac27a0ec | 508 | __le32 s_first_meta_bg; /* First metablock block group */ |
bd81d8ee LV |
509 | __le32 s_mkfs_time; /* When the filesystem was created */ |
510 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ | |
511 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ | |
512 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ | |
513 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ | |
514 | __le32 s_free_blocks_count_hi; /* Free blocks count */ | |
515 | __u32 s_reserved[169]; /* Padding to the end of the block */ | |
ac27a0ec DK |
516 | }; |
517 | ||
518 | #ifdef __KERNEL__ | |
617ba13b | 519 | static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb) |
ac27a0ec DK |
520 | { |
521 | return sb->s_fs_info; | |
522 | } | |
617ba13b | 523 | static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
ac27a0ec | 524 | { |
617ba13b | 525 | return container_of(inode, struct ext4_inode_info, vfs_inode); |
ac27a0ec DK |
526 | } |
527 | ||
617ba13b | 528 | static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) |
ac27a0ec | 529 | { |
617ba13b MC |
530 | return ino == EXT4_ROOT_INO || |
531 | ino == EXT4_JOURNAL_INO || | |
532 | ino == EXT4_RESIZE_INO || | |
533 | (ino >= EXT4_FIRST_INO(sb) && | |
534 | ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); | |
ac27a0ec DK |
535 | } |
536 | #else | |
617ba13b | 537 | /* Assume that user mode programs are passing in an ext4fs superblock, not |
ac27a0ec DK |
538 | * a kernel struct super_block. This will allow us to call the feature-test |
539 | * macros from user land. */ | |
617ba13b | 540 | #define EXT4_SB(sb) (sb) |
ac27a0ec DK |
541 | #endif |
542 | ||
617ba13b | 543 | #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
ac27a0ec DK |
544 | |
545 | /* | |
546 | * Codes for operating systems | |
547 | */ | |
617ba13b MC |
548 | #define EXT4_OS_LINUX 0 |
549 | #define EXT4_OS_HURD 1 | |
550 | #define EXT4_OS_MASIX 2 | |
551 | #define EXT4_OS_FREEBSD 3 | |
552 | #define EXT4_OS_LITES 4 | |
ac27a0ec DK |
553 | |
554 | /* | |
555 | * Revision levels | |
556 | */ | |
617ba13b MC |
557 | #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ |
558 | #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ | |
ac27a0ec | 559 | |
617ba13b MC |
560 | #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV |
561 | #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV | |
ac27a0ec | 562 | |
617ba13b | 563 | #define EXT4_GOOD_OLD_INODE_SIZE 128 |
ac27a0ec DK |
564 | |
565 | /* | |
566 | * Feature set definitions | |
567 | */ | |
568 | ||
617ba13b MC |
569 | #define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ |
570 | ( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) ) | |
571 | #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ | |
572 | ( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) ) | |
573 | #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ | |
574 | ( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) ) | |
575 | #define EXT4_SET_COMPAT_FEATURE(sb,mask) \ | |
576 | EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) | |
577 | #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ | |
578 | EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) | |
579 | #define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ | |
580 | EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) | |
581 | #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ | |
582 | EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) | |
583 | #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ | |
584 | EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) | |
585 | #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ | |
586 | EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) | |
587 | ||
588 | #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 | |
589 | #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 | |
590 | #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 | |
591 | #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 | |
592 | #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 | |
593 | #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 | |
594 | ||
595 | #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 | |
596 | #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 | |
597 | #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 | |
598 | ||
599 | #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 | |
600 | #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 | |
601 | #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ | |
602 | #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ | |
603 | #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 | |
a86c6181 | 604 | #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
bd81d8ee | 605 | #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 |
617ba13b MC |
606 | |
607 | #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR | |
608 | #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ | |
609 | EXT4_FEATURE_INCOMPAT_RECOVER| \ | |
a86c6181 | 610 | EXT4_FEATURE_INCOMPAT_META_BG| \ |
bd81d8ee LV |
611 | EXT4_FEATURE_INCOMPAT_EXTENTS| \ |
612 | EXT4_FEATURE_INCOMPAT_64BIT) | |
617ba13b MC |
613 | #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
614 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
615 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR) | |
ac27a0ec DK |
616 | |
617 | /* | |
618 | * Default values for user and/or group using reserved blocks | |
619 | */ | |
617ba13b MC |
620 | #define EXT4_DEF_RESUID 0 |
621 | #define EXT4_DEF_RESGID 0 | |
ac27a0ec DK |
622 | |
623 | /* | |
624 | * Default mount options | |
625 | */ | |
617ba13b MC |
626 | #define EXT4_DEFM_DEBUG 0x0001 |
627 | #define EXT4_DEFM_BSDGROUPS 0x0002 | |
628 | #define EXT4_DEFM_XATTR_USER 0x0004 | |
629 | #define EXT4_DEFM_ACL 0x0008 | |
630 | #define EXT4_DEFM_UID16 0x0010 | |
631 | #define EXT4_DEFM_JMODE 0x0060 | |
632 | #define EXT4_DEFM_JMODE_DATA 0x0020 | |
633 | #define EXT4_DEFM_JMODE_ORDERED 0x0040 | |
634 | #define EXT4_DEFM_JMODE_WBACK 0x0060 | |
ac27a0ec DK |
635 | |
636 | /* | |
637 | * Structure of a directory entry | |
638 | */ | |
617ba13b | 639 | #define EXT4_NAME_LEN 255 |
ac27a0ec | 640 | |
617ba13b | 641 | struct ext4_dir_entry { |
ac27a0ec DK |
642 | __le32 inode; /* Inode number */ |
643 | __le16 rec_len; /* Directory entry length */ | |
644 | __le16 name_len; /* Name length */ | |
617ba13b | 645 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
646 | }; |
647 | ||
648 | /* | |
617ba13b | 649 | * The new version of the directory entry. Since EXT4 structures are |
ac27a0ec DK |
650 | * stored in intel byte order, and the name_len field could never be |
651 | * bigger than 255 chars, it's safe to reclaim the extra byte for the | |
652 | * file_type field. | |
653 | */ | |
617ba13b | 654 | struct ext4_dir_entry_2 { |
ac27a0ec DK |
655 | __le32 inode; /* Inode number */ |
656 | __le16 rec_len; /* Directory entry length */ | |
657 | __u8 name_len; /* Name length */ | |
658 | __u8 file_type; | |
617ba13b | 659 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
660 | }; |
661 | ||
662 | /* | |
617ba13b | 663 | * Ext4 directory file types. Only the low 3 bits are used. The |
ac27a0ec DK |
664 | * other bits are reserved for now. |
665 | */ | |
617ba13b MC |
666 | #define EXT4_FT_UNKNOWN 0 |
667 | #define EXT4_FT_REG_FILE 1 | |
668 | #define EXT4_FT_DIR 2 | |
669 | #define EXT4_FT_CHRDEV 3 | |
670 | #define EXT4_FT_BLKDEV 4 | |
671 | #define EXT4_FT_FIFO 5 | |
672 | #define EXT4_FT_SOCK 6 | |
673 | #define EXT4_FT_SYMLINK 7 | |
ac27a0ec | 674 | |
617ba13b | 675 | #define EXT4_FT_MAX 8 |
ac27a0ec DK |
676 | |
677 | /* | |
617ba13b | 678 | * EXT4_DIR_PAD defines the directory entries boundaries |
ac27a0ec DK |
679 | * |
680 | * NOTE: It must be a multiple of 4 | |
681 | */ | |
617ba13b MC |
682 | #define EXT4_DIR_PAD 4 |
683 | #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) | |
684 | #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ | |
685 | ~EXT4_DIR_ROUND) | |
ac27a0ec DK |
686 | /* |
687 | * Hash Tree Directory indexing | |
688 | * (c) Daniel Phillips, 2001 | |
689 | */ | |
690 | ||
617ba13b MC |
691 | #ifdef CONFIG_EXT4_INDEX |
692 | #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ | |
693 | EXT4_FEATURE_COMPAT_DIR_INDEX) && \ | |
694 | (EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) | |
695 | #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) | |
696 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) | |
ac27a0ec DK |
697 | #else |
698 | #define is_dx(dir) 0 | |
617ba13b MC |
699 | #define EXT4_DIR_LINK_MAX(dir) ((dir)->i_nlink >= EXT4_LINK_MAX) |
700 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2) | |
ac27a0ec DK |
701 | #endif |
702 | ||
703 | /* Legal values for the dx_root hash_version field: */ | |
704 | ||
705 | #define DX_HASH_LEGACY 0 | |
706 | #define DX_HASH_HALF_MD4 1 | |
707 | #define DX_HASH_TEA 2 | |
708 | ||
709 | #ifdef __KERNEL__ | |
710 | ||
711 | /* hash info structure used by the directory hash */ | |
712 | struct dx_hash_info | |
713 | { | |
714 | u32 hash; | |
715 | u32 minor_hash; | |
716 | int hash_version; | |
717 | u32 *seed; | |
718 | }; | |
719 | ||
617ba13b | 720 | #define EXT4_HTREE_EOF 0x7fffffff |
ac27a0ec DK |
721 | |
722 | /* | |
617ba13b | 723 | * Control parameters used by ext4_htree_next_block |
ac27a0ec DK |
724 | */ |
725 | #define HASH_NB_ALWAYS 1 | |
726 | ||
727 | ||
728 | /* | |
729 | * Describe an inode's exact location on disk and in memory | |
730 | */ | |
617ba13b | 731 | struct ext4_iloc |
ac27a0ec DK |
732 | { |
733 | struct buffer_head *bh; | |
734 | unsigned long offset; | |
735 | unsigned long block_group; | |
736 | }; | |
737 | ||
617ba13b | 738 | static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
ac27a0ec | 739 | { |
617ba13b | 740 | return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
ac27a0ec DK |
741 | } |
742 | ||
743 | /* | |
744 | * This structure is stuffed into the struct file's private_data field | |
745 | * for directories. It is where we put information so that we can do | |
746 | * readdir operations in hash tree order. | |
747 | */ | |
748 | struct dir_private_info { | |
749 | struct rb_root root; | |
750 | struct rb_node *curr_node; | |
751 | struct fname *extra_fname; | |
752 | loff_t last_pos; | |
753 | __u32 curr_hash; | |
754 | __u32 curr_minor_hash; | |
755 | __u32 next_hash; | |
756 | }; | |
757 | ||
758 | /* calculate the first block number of the group */ | |
617ba13b MC |
759 | static inline ext4_fsblk_t |
760 | ext4_group_first_block_no(struct super_block *sb, unsigned long group_no) | |
ac27a0ec | 761 | { |
617ba13b MC |
762 | return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + |
763 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); | |
ac27a0ec DK |
764 | } |
765 | ||
766 | /* | |
767 | * Special error return code only used by dx_probe() and its callers. | |
768 | */ | |
769 | #define ERR_BAD_DX_DIR -75000 | |
770 | ||
3a5b2ecd MC |
771 | /* |
772 | * This function calculate the block group number and offset, | |
773 | * given a block number | |
774 | */ | |
775 | ||
776 | static inline void ext4_get_group_no_and_offset(struct super_block * sb, | |
777 | ext4_fsblk_t blocknr, unsigned long* blockgrpp, | |
778 | ext4_grpblk_t *offsetp) | |
779 | { | |
780 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
781 | ext4_grpblk_t offset; | |
782 | ||
783 | blocknr = blocknr - le32_to_cpu(es->s_first_data_block); | |
784 | offset = sector_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb)); | |
785 | if (offsetp) | |
786 | *offsetp = offset; | |
787 | if (blockgrpp) | |
788 | *blockgrpp = blocknr; | |
789 | ||
790 | } | |
791 | ||
ac27a0ec DK |
792 | /* |
793 | * Function prototypes | |
794 | */ | |
795 | ||
796 | /* | |
797 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
617ba13b | 798 | * ext4 source programs needs to include it so they are duplicated here. |
ac27a0ec DK |
799 | */ |
800 | # define NORET_TYPE /**/ | |
801 | # define ATTRIB_NORET __attribute__((noreturn)) | |
802 | # define NORET_AND noreturn, | |
803 | ||
804 | /* balloc.c */ | |
3a5b2ecd MC |
805 | extern unsigned int ext4_block_group(struct super_block *sb, |
806 | ext4_fsblk_t blocknr); | |
807 | extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, | |
808 | ext4_fsblk_t blocknr); | |
617ba13b MC |
809 | extern int ext4_bg_has_super(struct super_block *sb, int group); |
810 | extern unsigned long ext4_bg_num_gdb(struct super_block *sb, int group); | |
811 | extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode, | |
812 | ext4_fsblk_t goal, int *errp); | |
813 | extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode, | |
814 | ext4_fsblk_t goal, unsigned long *count, int *errp); | |
815 | extern void ext4_free_blocks (handle_t *handle, struct inode *inode, | |
816 | ext4_fsblk_t block, unsigned long count); | |
817 | extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb, | |
818 | ext4_fsblk_t block, unsigned long count, | |
ac27a0ec | 819 | unsigned long *pdquot_freed_blocks); |
617ba13b MC |
820 | extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *); |
821 | extern void ext4_check_blocks_bitmap (struct super_block *); | |
822 | extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, | |
ac27a0ec DK |
823 | unsigned int block_group, |
824 | struct buffer_head ** bh); | |
617ba13b MC |
825 | extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
826 | extern void ext4_init_block_alloc_info(struct inode *); | |
827 | extern void ext4_rsv_window_add(struct super_block *sb, struct ext4_reserve_window_node *rsv); | |
ac27a0ec DK |
828 | |
829 | /* dir.c */ | |
617ba13b MC |
830 | extern int ext4_check_dir_entry(const char *, struct inode *, |
831 | struct ext4_dir_entry_2 *, | |
ac27a0ec | 832 | struct buffer_head *, unsigned long); |
617ba13b | 833 | extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
ac27a0ec | 834 | __u32 minor_hash, |
617ba13b MC |
835 | struct ext4_dir_entry_2 *dirent); |
836 | extern void ext4_htree_free_dir_info(struct dir_private_info *p); | |
ac27a0ec DK |
837 | |
838 | /* fsync.c */ | |
617ba13b | 839 | extern int ext4_sync_file (struct file *, struct dentry *, int); |
ac27a0ec DK |
840 | |
841 | /* hash.c */ | |
617ba13b | 842 | extern int ext4fs_dirhash(const char *name, int len, struct |
ac27a0ec DK |
843 | dx_hash_info *hinfo); |
844 | ||
845 | /* ialloc.c */ | |
617ba13b MC |
846 | extern struct inode * ext4_new_inode (handle_t *, struct inode *, int); |
847 | extern void ext4_free_inode (handle_t *, struct inode *); | |
848 | extern struct inode * ext4_orphan_get (struct super_block *, unsigned long); | |
849 | extern unsigned long ext4_count_free_inodes (struct super_block *); | |
850 | extern unsigned long ext4_count_dirs (struct super_block *); | |
851 | extern void ext4_check_inodes_bitmap (struct super_block *); | |
852 | extern unsigned long ext4_count_free (struct buffer_head *, unsigned); | |
ac27a0ec DK |
853 | |
854 | ||
855 | /* inode.c */ | |
617ba13b MC |
856 | int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, |
857 | struct buffer_head *bh, ext4_fsblk_t blocknr); | |
858 | struct buffer_head * ext4_getblk (handle_t *, struct inode *, long, int, int *); | |
859 | struct buffer_head * ext4_bread (handle_t *, struct inode *, int, int, int *); | |
860 | int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, | |
ac27a0ec DK |
861 | sector_t iblock, unsigned long maxblocks, struct buffer_head *bh_result, |
862 | int create, int extend_disksize); | |
863 | ||
617ba13b MC |
864 | extern void ext4_read_inode (struct inode *); |
865 | extern int ext4_write_inode (struct inode *, int); | |
866 | extern int ext4_setattr (struct dentry *, struct iattr *); | |
867 | extern void ext4_delete_inode (struct inode *); | |
868 | extern int ext4_sync_inode (handle_t *, struct inode *); | |
869 | extern void ext4_discard_reservation (struct inode *); | |
870 | extern void ext4_dirty_inode(struct inode *); | |
871 | extern int ext4_change_inode_journal_flag(struct inode *, int); | |
872 | extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); | |
873 | extern void ext4_truncate (struct inode *); | |
874 | extern void ext4_set_inode_flags(struct inode *); | |
875 | extern void ext4_set_aops(struct inode *inode); | |
a86c6181 AT |
876 | extern int ext4_writepage_trans_blocks(struct inode *); |
877 | extern int ext4_block_truncate_page(handle_t *handle, struct page *page, | |
878 | struct address_space *mapping, loff_t from); | |
ac27a0ec DK |
879 | |
880 | /* ioctl.c */ | |
617ba13b | 881 | extern int ext4_ioctl (struct inode *, struct file *, unsigned int, |
ac27a0ec | 882 | unsigned long); |
617ba13b | 883 | extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long); |
ac27a0ec DK |
884 | |
885 | /* namei.c */ | |
617ba13b MC |
886 | extern int ext4_orphan_add(handle_t *, struct inode *); |
887 | extern int ext4_orphan_del(handle_t *, struct inode *); | |
888 | extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, | |
ac27a0ec DK |
889 | __u32 start_minor_hash, __u32 *next_hash); |
890 | ||
891 | /* resize.c */ | |
617ba13b MC |
892 | extern int ext4_group_add(struct super_block *sb, |
893 | struct ext4_new_group_data *input); | |
894 | extern int ext4_group_extend(struct super_block *sb, | |
895 | struct ext4_super_block *es, | |
896 | ext4_fsblk_t n_blocks_count); | |
ac27a0ec DK |
897 | |
898 | /* super.c */ | |
617ba13b | 899 | extern void ext4_error (struct super_block *, const char *, const char *, ...) |
ac27a0ec | 900 | __attribute__ ((format (printf, 3, 4))); |
617ba13b MC |
901 | extern void __ext4_std_error (struct super_block *, const char *, int); |
902 | extern void ext4_abort (struct super_block *, const char *, const char *, ...) | |
ac27a0ec | 903 | __attribute__ ((format (printf, 3, 4))); |
617ba13b | 904 | extern void ext4_warning (struct super_block *, const char *, const char *, ...) |
ac27a0ec | 905 | __attribute__ ((format (printf, 3, 4))); |
617ba13b | 906 | extern void ext4_update_dynamic_rev (struct super_block *sb); |
bd81d8ee LV |
907 | extern ext4_fsblk_t ext4_block_bitmap(struct ext4_group_desc *bg); |
908 | extern ext4_fsblk_t ext4_inode_bitmap(struct ext4_group_desc *bg); | |
909 | extern ext4_fsblk_t ext4_inode_table(struct ext4_group_desc *bg); | |
910 | extern void ext4_block_bitmap_set(struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
911 | extern void ext4_inode_bitmap_set(struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
912 | extern void ext4_inode_table_set(struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
913 | ||
914 | static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) | |
915 | { | |
916 | return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | | |
917 | le32_to_cpu(es->s_blocks_count); | |
918 | } | |
919 | ||
920 | static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) | |
921 | { | |
922 | return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | | |
923 | le32_to_cpu(es->s_r_blocks_count); | |
924 | } | |
925 | ||
926 | static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) | |
927 | { | |
928 | return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | | |
929 | le32_to_cpu(es->s_free_blocks_count); | |
930 | } | |
931 | ||
932 | static inline void ext4_blocks_count_set(struct ext4_super_block *es, | |
933 | ext4_fsblk_t blk) | |
934 | { | |
935 | es->s_blocks_count = cpu_to_le32((u32)blk); | |
936 | es->s_blocks_count_hi = cpu_to_le32(blk >> 32); | |
937 | } | |
938 | ||
939 | static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, | |
940 | ext4_fsblk_t blk) | |
941 | { | |
942 | es->s_free_blocks_count = cpu_to_le32((u32)blk); | |
943 | es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); | |
944 | } | |
945 | ||
946 | static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, | |
947 | ext4_fsblk_t blk) | |
948 | { | |
949 | es->s_r_blocks_count = cpu_to_le32((u32)blk); | |
950 | es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); | |
951 | } | |
952 | ||
953 | ||
ac27a0ec | 954 | |
617ba13b | 955 | #define ext4_std_error(sb, errno) \ |
ac27a0ec DK |
956 | do { \ |
957 | if ((errno)) \ | |
617ba13b | 958 | __ext4_std_error((sb), __FUNCTION__, (errno)); \ |
ac27a0ec DK |
959 | } while (0) |
960 | ||
961 | /* | |
962 | * Inodes and files operations | |
963 | */ | |
964 | ||
965 | /* dir.c */ | |
617ba13b | 966 | extern const struct file_operations ext4_dir_operations; |
ac27a0ec DK |
967 | |
968 | /* file.c */ | |
617ba13b MC |
969 | extern struct inode_operations ext4_file_inode_operations; |
970 | extern const struct file_operations ext4_file_operations; | |
ac27a0ec DK |
971 | |
972 | /* namei.c */ | |
617ba13b MC |
973 | extern struct inode_operations ext4_dir_inode_operations; |
974 | extern struct inode_operations ext4_special_inode_operations; | |
ac27a0ec DK |
975 | |
976 | /* symlink.c */ | |
617ba13b MC |
977 | extern struct inode_operations ext4_symlink_inode_operations; |
978 | extern struct inode_operations ext4_fast_symlink_inode_operations; | |
ac27a0ec | 979 | |
a86c6181 AT |
980 | /* extents.c */ |
981 | extern int ext4_ext_tree_init(handle_t *handle, struct inode *); | |
982 | extern int ext4_ext_writepage_trans_blocks(struct inode *, int); | |
983 | extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, | |
984 | ext4_fsblk_t iblock, | |
985 | unsigned long max_blocks, struct buffer_head *bh_result, | |
986 | int create, int extend_disksize); | |
987 | extern void ext4_ext_truncate(struct inode *, struct page *); | |
988 | extern void ext4_ext_init(struct super_block *); | |
989 | extern void ext4_ext_release(struct super_block *); | |
990 | static inline int | |
991 | ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, | |
992 | unsigned long max_blocks, struct buffer_head *bh, | |
993 | int create, int extend_disksize) | |
994 | { | |
995 | if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) | |
996 | return ext4_ext_get_blocks(handle, inode, block, max_blocks, | |
997 | bh, create, extend_disksize); | |
998 | return ext4_get_blocks_handle(handle, inode, block, max_blocks, bh, | |
999 | create, extend_disksize); | |
1000 | } | |
1001 | ||
ac27a0ec DK |
1002 | |
1003 | #endif /* __KERNEL__ */ | |
1004 | ||
617ba13b | 1005 | #endif /* _LINUX_EXT4_FS_H */ |