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Commit | Line | Data |
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ac27a0ec | 1 | /* |
3dcf5451 | 2 | * ext4.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 | ||
3dcf5451 CH |
16 | #ifndef _EXT4_H |
17 | #define _EXT4_H | |
ac27a0ec DK |
18 | |
19 | #include <linux/types.h> | |
3a5b2ecd | 20 | #include <linux/blkdev.h> |
ac27a0ec | 21 | #include <linux/magic.h> |
2ccb5fb9 | 22 | #include <linux/jbd2.h> |
60e58e0f | 23 | #include <linux/quota.h> |
3dcf5451 | 24 | #include "ext4_i.h" |
c9de560d | 25 | |
ac27a0ec | 26 | /* |
8a35694e | 27 | * The fourth extended filesystem constants/structures |
ac27a0ec DK |
28 | */ |
29 | ||
30 | /* | |
617ba13b | 31 | * Define EXT4FS_DEBUG to produce debug messages |
ac27a0ec | 32 | */ |
617ba13b | 33 | #undef EXT4FS_DEBUG |
ac27a0ec | 34 | |
ac27a0ec DK |
35 | /* |
36 | * Debug code | |
37 | */ | |
617ba13b MC |
38 | #ifdef EXT4FS_DEBUG |
39 | #define ext4_debug(f, a...) \ | |
ac27a0ec | 40 | do { \ |
af5bc92d | 41 | printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
4db9c54a | 42 | __FILE__, __LINE__, __func__); \ |
af5bc92d | 43 | printk(KERN_DEBUG f, ## a); \ |
ac27a0ec DK |
44 | } while (0) |
45 | #else | |
617ba13b | 46 | #define ext4_debug(f, a...) do {} while (0) |
ac27a0ec DK |
47 | #endif |
48 | ||
c9de560d AT |
49 | /* prefer goal again. length */ |
50 | #define EXT4_MB_HINT_MERGE 1 | |
51 | /* blocks already reserved */ | |
52 | #define EXT4_MB_HINT_RESERVED 2 | |
53 | /* metadata is being allocated */ | |
54 | #define EXT4_MB_HINT_METADATA 4 | |
55 | /* first blocks in the file */ | |
56 | #define EXT4_MB_HINT_FIRST 8 | |
57 | /* search for the best chunk */ | |
58 | #define EXT4_MB_HINT_BEST 16 | |
59 | /* data is being allocated */ | |
60 | #define EXT4_MB_HINT_DATA 32 | |
61 | /* don't preallocate (for tails) */ | |
62 | #define EXT4_MB_HINT_NOPREALLOC 64 | |
63 | /* allocate for locality group */ | |
64 | #define EXT4_MB_HINT_GROUP_ALLOC 128 | |
65 | /* allocate goal blocks or none */ | |
66 | #define EXT4_MB_HINT_GOAL_ONLY 256 | |
67 | /* goal is meaningful */ | |
68 | #define EXT4_MB_HINT_TRY_GOAL 512 | |
d2a17637 MC |
69 | /* blocks already pre-reserved by delayed allocation */ |
70 | #define EXT4_MB_DELALLOC_RESERVED 1024 | |
71 | ||
c9de560d AT |
72 | |
73 | struct ext4_allocation_request { | |
74 | /* target inode for block we're allocating */ | |
75 | struct inode *inode; | |
76 | /* logical block in target inode */ | |
77 | ext4_lblk_t logical; | |
78 | /* phys. target (a hint) */ | |
79 | ext4_fsblk_t goal; | |
80 | /* the closest logical allocated block to the left */ | |
81 | ext4_lblk_t lleft; | |
82 | /* phys. block for ^^^ */ | |
83 | ext4_fsblk_t pleft; | |
84 | /* the closest logical allocated block to the right */ | |
85 | ext4_lblk_t lright; | |
86 | /* phys. block for ^^^ */ | |
87 | ext4_fsblk_t pright; | |
88 | /* how many blocks we want to allocate */ | |
498e5f24 | 89 | unsigned int len; |
c9de560d | 90 | /* flags. see above EXT4_MB_HINT_* */ |
498e5f24 | 91 | unsigned int flags; |
c9de560d AT |
92 | }; |
93 | ||
ac27a0ec DK |
94 | /* |
95 | * Special inodes numbers | |
96 | */ | |
617ba13b MC |
97 | #define EXT4_BAD_INO 1 /* Bad blocks inode */ |
98 | #define EXT4_ROOT_INO 2 /* Root inode */ | |
99 | #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ | |
100 | #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ | |
101 | #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ | |
102 | #define EXT4_JOURNAL_INO 8 /* Journal inode */ | |
ac27a0ec | 103 | |
617ba13b MC |
104 | /* First non-reserved inode for old ext4 filesystems */ |
105 | #define EXT4_GOOD_OLD_FIRST_INO 11 | |
ac27a0ec DK |
106 | |
107 | /* | |
108 | * Maximal count of links to a file | |
109 | */ | |
f8628a14 | 110 | #define EXT4_LINK_MAX 65000 |
ac27a0ec DK |
111 | |
112 | /* | |
113 | * Macro-instructions used to manage several block sizes | |
114 | */ | |
617ba13b | 115 | #define EXT4_MIN_BLOCK_SIZE 1024 |
afc7cbca TS |
116 | #define EXT4_MAX_BLOCK_SIZE 65536 |
117 | #define EXT4_MIN_BLOCK_LOG_SIZE 10 | |
ac27a0ec | 118 | #ifdef __KERNEL__ |
617ba13b | 119 | # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
ac27a0ec | 120 | #else |
617ba13b | 121 | # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
ac27a0ec | 122 | #endif |
af5bc92d | 123 | #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) |
ac27a0ec | 124 | #ifdef __KERNEL__ |
617ba13b | 125 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
ac27a0ec | 126 | #else |
617ba13b | 127 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
ac27a0ec DK |
128 | #endif |
129 | #ifdef __KERNEL__ | |
617ba13b MC |
130 | #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) |
131 | #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) | |
132 | #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) | |
ac27a0ec | 133 | #else |
617ba13b MC |
134 | #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
135 | EXT4_GOOD_OLD_INODE_SIZE : \ | |
ac27a0ec | 136 | (s)->s_inode_size) |
617ba13b MC |
137 | #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
138 | EXT4_GOOD_OLD_FIRST_INO : \ | |
ac27a0ec DK |
139 | (s)->s_first_ino) |
140 | #endif | |
a2df2a63 | 141 | #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) |
ac27a0ec | 142 | |
ac27a0ec DK |
143 | /* |
144 | * Structure of a blocks group descriptor | |
145 | */ | |
617ba13b | 146 | struct ext4_group_desc |
ac27a0ec | 147 | { |
3a14589c | 148 | __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ |
5272f837 AK |
149 | __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ |
150 | __le32 bg_inode_table_lo; /* Inodes table block */ | |
560671a0 AK |
151 | __le16 bg_free_blocks_count_lo;/* Free blocks count */ |
152 | __le16 bg_free_inodes_count_lo;/* Free inodes count */ | |
153 | __le16 bg_used_dirs_count_lo; /* Directories count */ | |
717d50e4 AD |
154 | __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ |
155 | __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */ | |
560671a0 | 156 | __le16 bg_itable_unused_lo; /* Unused inodes count */ |
717d50e4 | 157 | __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ |
8fadc143 AR |
158 | __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ |
159 | __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ | |
160 | __le32 bg_inode_table_hi; /* Inodes table block MSB */ | |
91b51a01 CL |
161 | __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ |
162 | __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ | |
163 | __le16 bg_used_dirs_count_hi; /* Directories count MSB */ | |
560671a0 | 164 | __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ |
91b51a01 | 165 | __u32 bg_reserved2[3]; |
ac27a0ec DK |
166 | }; |
167 | ||
772cb7c8 JS |
168 | /* |
169 | * Structure of a flex block group info | |
170 | */ | |
171 | ||
172 | struct flex_groups { | |
9f24e420 TT |
173 | atomic_t free_inodes; |
174 | atomic_t free_blocks; | |
772cb7c8 JS |
175 | }; |
176 | ||
717d50e4 AD |
177 | #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ |
178 | #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ | |
179 | #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ | |
180 | ||
bd81d8ee | 181 | #ifdef __KERNEL__ |
3dcf5451 | 182 | #include "ext4_sb.h" |
bd81d8ee | 183 | #endif |
ac27a0ec DK |
184 | /* |
185 | * Macro-instructions used to manage group descriptors | |
186 | */ | |
0d1ee42f | 187 | #define EXT4_MIN_DESC_SIZE 32 |
8fadc143 | 188 | #define EXT4_MIN_DESC_SIZE_64BIT 64 |
0d1ee42f AR |
189 | #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE |
190 | #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) | |
ac27a0ec | 191 | #ifdef __KERNEL__ |
617ba13b MC |
192 | # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) |
193 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) | |
194 | # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) | |
195 | # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) | |
ac27a0ec | 196 | #else |
617ba13b | 197 | # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
0d1ee42f | 198 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) |
617ba13b | 199 | # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
ac27a0ec DK |
200 | #endif |
201 | ||
202 | /* | |
203 | * Constants relative to the data blocks | |
204 | */ | |
617ba13b MC |
205 | #define EXT4_NDIR_BLOCKS 12 |
206 | #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS | |
207 | #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) | |
208 | #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) | |
209 | #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) | |
ac27a0ec DK |
210 | |
211 | /* | |
212 | * Inode flags | |
213 | */ | |
617ba13b MC |
214 | #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ |
215 | #define EXT4_UNRM_FL 0x00000002 /* Undelete */ | |
216 | #define EXT4_COMPR_FL 0x00000004 /* Compress file */ | |
217 | #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ | |
218 | #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
219 | #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ | |
220 | #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ | |
221 | #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ | |
ac27a0ec | 222 | /* Reserved for compression usage... */ |
617ba13b MC |
223 | #define EXT4_DIRTY_FL 0x00000100 |
224 | #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
225 | #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ | |
226 | #define EXT4_ECOMPR_FL 0x00000800 /* Compression error */ | |
ac27a0ec | 227 | /* End compression flags --- maybe not all used */ |
617ba13b MC |
228 | #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ |
229 | #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ | |
230 | #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ | |
231 | #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
232 | #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
233 | #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
8180a562 | 234 | #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ |
a86c6181 | 235 | #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
267e4db9 | 236 | #define EXT4_EXT_MIGRATE 0x00100000 /* Inode is migrating */ |
8180a562 | 237 | #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ |
ac27a0ec | 238 | |
a86c6181 | 239 | #define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ |
4db46fc2 | 240 | #define EXT4_FL_USER_MODIFIABLE 0x000B80FF /* User modifiable flags */ |
ac27a0ec | 241 | |
8fa43a81 DG |
242 | /* Flags that should be inherited by new inodes from their parent. */ |
243 | #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ | |
244 | EXT4_SYNC_FL | EXT4_IMMUTABLE_FL | EXT4_APPEND_FL |\ | |
245 | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ | |
246 | EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ | |
247 | EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL) | |
248 | ||
2dc6b0d4 DG |
249 | /* Flags that are appropriate for regular files (all but dir-specific ones). */ |
250 | #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL)) | |
251 | ||
252 | /* Flags that are appropriate for non-directories/regular files. */ | |
253 | #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) | |
254 | ||
255 | /* Mask out flags that are inappropriate for the given type of inode. */ | |
256 | static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) | |
257 | { | |
258 | if (S_ISDIR(mode)) | |
259 | return flags; | |
260 | else if (S_ISREG(mode)) | |
261 | return flags & EXT4_REG_FLMASK; | |
262 | else | |
263 | return flags & EXT4_OTHER_FLMASK; | |
264 | } | |
265 | ||
ac27a0ec DK |
266 | /* |
267 | * Inode dynamic state flags | |
268 | */ | |
617ba13b MC |
269 | #define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */ |
270 | #define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ | |
271 | #define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ | |
6dd4ee7c | 272 | #define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */ |
7d8f9f7d | 273 | #define EXT4_STATE_DA_ALLOC_CLOSE 0x00000010 /* Alloc DA blks on close */ |
ac27a0ec DK |
274 | |
275 | /* Used to pass group descriptor data when online resize is done */ | |
617ba13b | 276 | struct ext4_new_group_input { |
8c55e204 DK |
277 | __u32 group; /* Group number for this data */ |
278 | __u64 block_bitmap; /* Absolute block number of block bitmap */ | |
279 | __u64 inode_bitmap; /* Absolute block number of inode bitmap */ | |
280 | __u64 inode_table; /* Absolute block number of inode table start */ | |
281 | __u32 blocks_count; /* Total number of blocks in this group */ | |
282 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
ac27a0ec DK |
283 | __u16 unused; |
284 | }; | |
285 | ||
617ba13b MC |
286 | /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ |
287 | struct ext4_new_group_data { | |
ac27a0ec | 288 | __u32 group; |
bd81d8ee LV |
289 | __u64 block_bitmap; |
290 | __u64 inode_bitmap; | |
291 | __u64 inode_table; | |
ac27a0ec DK |
292 | __u32 blocks_count; |
293 | __u16 reserved_blocks; | |
294 | __u16 unused; | |
295 | __u32 free_blocks_count; | |
296 | }; | |
297 | ||
a2df2a63 AA |
298 | /* |
299 | * Following is used by preallocation code to tell get_blocks() that we | |
300 | * want uninitialzed extents. | |
301 | */ | |
302 | #define EXT4_CREATE_UNINITIALIZED_EXT 2 | |
ac27a0ec DK |
303 | |
304 | /* | |
305 | * ioctl commands | |
306 | */ | |
617ba13b MC |
307 | #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS |
308 | #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS | |
309 | #define EXT4_IOC_GETVERSION _IOR('f', 3, long) | |
310 | #define EXT4_IOC_SETVERSION _IOW('f', 4, long) | |
617ba13b MC |
311 | #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
312 | #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION | |
e23291b9 | 313 | #ifdef CONFIG_JBD2_DEBUG |
617ba13b | 314 | #define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
ac27a0ec | 315 | #endif |
617ba13b MC |
316 | #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) |
317 | #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) | |
8eea80d5 TT |
318 | #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) |
319 | #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) | |
320 | #define EXT4_IOC_MIGRATE _IO('f', 9) | |
ccd2506b | 321 | /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ |
8eea80d5 | 322 | /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ |
ccd2506b | 323 | #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) |
ac27a0ec DK |
324 | |
325 | /* | |
326 | * ioctl commands in 32 bit emulation | |
327 | */ | |
617ba13b MC |
328 | #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
329 | #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS | |
330 | #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) | |
331 | #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) | |
332 | #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) | |
333 | #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) | |
334 | #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | |
e23291b9 | 335 | #ifdef CONFIG_JBD2_DEBUG |
617ba13b | 336 | #define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
ac27a0ec | 337 | #endif |
617ba13b MC |
338 | #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
339 | #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | |
ac27a0ec DK |
340 | |
341 | ||
342 | /* | |
343 | * Mount options | |
344 | */ | |
617ba13b | 345 | struct ext4_mount_options { |
ac27a0ec DK |
346 | unsigned long s_mount_opt; |
347 | uid_t s_resuid; | |
348 | gid_t s_resgid; | |
349 | unsigned long s_commit_interval; | |
30773840 | 350 | u32 s_min_batch_time, s_max_batch_time; |
ac27a0ec DK |
351 | #ifdef CONFIG_QUOTA |
352 | int s_jquota_fmt; | |
353 | char *s_qf_names[MAXQUOTAS]; | |
354 | #endif | |
355 | }; | |
356 | ||
357 | /* | |
358 | * Structure of an inode on the disk | |
359 | */ | |
617ba13b | 360 | struct ext4_inode { |
ac27a0ec DK |
361 | __le16 i_mode; /* File mode */ |
362 | __le16 i_uid; /* Low 16 bits of Owner Uid */ | |
a48380f7 | 363 | __le32 i_size_lo; /* Size in bytes */ |
ac27a0ec | 364 | __le32 i_atime; /* Access time */ |
ef7f3835 | 365 | __le32 i_ctime; /* Inode Change time */ |
ac27a0ec DK |
366 | __le32 i_mtime; /* Modification time */ |
367 | __le32 i_dtime; /* Deletion Time */ | |
368 | __le16 i_gid; /* Low 16 bits of Group Id */ | |
369 | __le16 i_links_count; /* Links count */ | |
0fc1b451 | 370 | __le32 i_blocks_lo; /* Blocks count */ |
ac27a0ec DK |
371 | __le32 i_flags; /* File flags */ |
372 | union { | |
373 | struct { | |
25ec56b5 | 374 | __le32 l_i_version; |
ac27a0ec DK |
375 | } linux1; |
376 | struct { | |
377 | __u32 h_i_translator; | |
378 | } hurd1; | |
379 | struct { | |
380 | __u32 m_i_reserved1; | |
381 | } masix1; | |
382 | } osd1; /* OS dependent 1 */ | |
617ba13b | 383 | __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
ac27a0ec | 384 | __le32 i_generation; /* File version (for NFS) */ |
7973c0c1 | 385 | __le32 i_file_acl_lo; /* File ACL */ |
a48380f7 | 386 | __le32 i_size_high; |
f077d0d7 | 387 | __le32 i_obso_faddr; /* Obsoleted fragment address */ |
ac27a0ec DK |
388 | union { |
389 | struct { | |
0fc1b451 | 390 | __le16 l_i_blocks_high; /* were l_i_reserved1 */ |
a1ddeb7e | 391 | __le16 l_i_file_acl_high; |
8c55e204 | 392 | __le16 l_i_uid_high; /* these 2 fields */ |
ac27a0ec DK |
393 | __le16 l_i_gid_high; /* were reserved2[0] */ |
394 | __u32 l_i_reserved2; | |
395 | } linux2; | |
396 | struct { | |
f077d0d7 | 397 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
ac27a0ec DK |
398 | __u16 h_i_mode_high; |
399 | __u16 h_i_uid_high; | |
400 | __u16 h_i_gid_high; | |
401 | __u32 h_i_author; | |
402 | } hurd2; | |
403 | struct { | |
f077d0d7 | 404 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
a1ddeb7e | 405 | __le16 m_i_file_acl_high; |
ac27a0ec DK |
406 | __u32 m_i_reserved2[2]; |
407 | } masix2; | |
408 | } osd2; /* OS dependent 2 */ | |
409 | __le16 i_extra_isize; | |
410 | __le16 i_pad1; | |
ef7f3835 KS |
411 | __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ |
412 | __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ | |
413 | __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ | |
414 | __le32 i_crtime; /* File Creation time */ | |
415 | __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ | |
25ec56b5 | 416 | __le32 i_version_hi; /* high 32 bits for 64-bit version */ |
ac27a0ec DK |
417 | }; |
418 | ||
ac27a0ec | 419 | |
ef7f3835 KS |
420 | #define EXT4_EPOCH_BITS 2 |
421 | #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) | |
422 | #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) | |
423 | ||
424 | /* | |
425 | * Extended fields will fit into an inode if the filesystem was formatted | |
426 | * with large inodes (-I 256 or larger) and there are not currently any EAs | |
427 | * consuming all of the available space. For new inodes we always reserve | |
428 | * enough space for the kernel's known extended fields, but for inodes | |
429 | * created with an old kernel this might not have been the case. None of | |
430 | * the extended inode fields is critical for correct filesystem operation. | |
431 | * This macro checks if a certain field fits in the inode. Note that | |
432 | * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize | |
433 | */ | |
434 | #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ | |
435 | ((offsetof(typeof(*ext4_inode), field) + \ | |
436 | sizeof((ext4_inode)->field)) \ | |
437 | <= (EXT4_GOOD_OLD_INODE_SIZE + \ | |
438 | (einode)->i_extra_isize)) \ | |
439 | ||
440 | static inline __le32 ext4_encode_extra_time(struct timespec *time) | |
441 | { | |
442 | return cpu_to_le32((sizeof(time->tv_sec) > 4 ? | |
443 | time->tv_sec >> 32 : 0) | | |
444 | ((time->tv_nsec << 2) & EXT4_NSEC_MASK)); | |
445 | } | |
446 | ||
447 | static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) | |
448 | { | |
449 | if (sizeof(time->tv_sec) > 4) | |
450 | time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) | |
451 | << 32; | |
452 | time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2; | |
453 | } | |
454 | ||
455 | #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ | |
456 | do { \ | |
457 | (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ | |
458 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ | |
459 | (raw_inode)->xtime ## _extra = \ | |
460 | ext4_encode_extra_time(&(inode)->xtime); \ | |
461 | } while (0) | |
462 | ||
463 | #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ | |
464 | do { \ | |
465 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ | |
466 | (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ | |
467 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ | |
468 | (raw_inode)->xtime ## _extra = \ | |
469 | ext4_encode_extra_time(&(einode)->xtime); \ | |
470 | } while (0) | |
471 | ||
472 | #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ | |
473 | do { \ | |
474 | (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ | |
475 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ | |
476 | ext4_decode_extra_time(&(inode)->xtime, \ | |
477 | raw_inode->xtime ## _extra); \ | |
478 | } while (0) | |
479 | ||
480 | #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ | |
481 | do { \ | |
482 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ | |
483 | (einode)->xtime.tv_sec = \ | |
484 | (signed)le32_to_cpu((raw_inode)->xtime); \ | |
485 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ | |
486 | ext4_decode_extra_time(&(einode)->xtime, \ | |
487 | raw_inode->xtime ## _extra); \ | |
488 | } while (0) | |
489 | ||
25ec56b5 JNC |
490 | #define i_disk_version osd1.linux1.l_i_version |
491 | ||
ac27a0ec DK |
492 | #if defined(__KERNEL__) || defined(__linux__) |
493 | #define i_reserved1 osd1.linux1.l_i_reserved1 | |
a1ddeb7e | 494 | #define i_file_acl_high osd2.linux2.l_i_file_acl_high |
0fc1b451 | 495 | #define i_blocks_high osd2.linux2.l_i_blocks_high |
ac27a0ec DK |
496 | #define i_uid_low i_uid |
497 | #define i_gid_low i_gid | |
498 | #define i_uid_high osd2.linux2.l_i_uid_high | |
499 | #define i_gid_high osd2.linux2.l_i_gid_high | |
500 | #define i_reserved2 osd2.linux2.l_i_reserved2 | |
501 | ||
502 | #elif defined(__GNU__) | |
503 | ||
504 | #define i_translator osd1.hurd1.h_i_translator | |
ac27a0ec DK |
505 | #define i_uid_high osd2.hurd2.h_i_uid_high |
506 | #define i_gid_high osd2.hurd2.h_i_gid_high | |
507 | #define i_author osd2.hurd2.h_i_author | |
508 | ||
509 | #elif defined(__masix__) | |
510 | ||
511 | #define i_reserved1 osd1.masix1.m_i_reserved1 | |
a1ddeb7e | 512 | #define i_file_acl_high osd2.masix2.m_i_file_acl_high |
ac27a0ec DK |
513 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
514 | ||
515 | #endif /* defined(__KERNEL__) || defined(__linux__) */ | |
516 | ||
517 | /* | |
518 | * File system states | |
519 | */ | |
617ba13b MC |
520 | #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ |
521 | #define EXT4_ERROR_FS 0x0002 /* Errors detected */ | |
522 | #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ | |
ac27a0ec | 523 | |
469108ff TT |
524 | /* |
525 | * Misc. filesystem flags | |
526 | */ | |
527 | #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ | |
528 | #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ | |
529 | #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ | |
530 | ||
ac27a0ec DK |
531 | /* |
532 | * Mount flags | |
533 | */ | |
617ba13b MC |
534 | #define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ |
535 | #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ | |
536 | #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ | |
537 | #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ | |
538 | #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ | |
539 | #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ | |
540 | #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ | |
541 | #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ | |
542 | #define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */ | |
543 | #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ | |
544 | #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ | |
545 | #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ | |
546 | #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ | |
547 | #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ | |
548 | #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ | |
549 | #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ | |
550 | #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ | |
551 | #define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ | |
552 | #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ | |
553 | #define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ | |
554 | #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ | |
555 | #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ | |
556 | #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ | |
818d276c GS |
557 | #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ |
558 | #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ | |
25ec56b5 | 559 | #define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ |
64769240 | 560 | #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ |
5bf5683a HK |
561 | #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ |
562 | ||
617ba13b | 563 | /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ |
ac27a0ec | 564 | #ifndef _LINUX_EXT2_FS_H |
617ba13b MC |
565 | #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt |
566 | #define set_opt(o, opt) o |= EXT4_MOUNT_##opt | |
567 | #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ | |
568 | EXT4_MOUNT_##opt) | |
ac27a0ec | 569 | #else |
617ba13b MC |
570 | #define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD |
571 | #define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT | |
572 | #define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS | |
ac27a0ec DK |
573 | #endif |
574 | ||
617ba13b MC |
575 | #define ext4_set_bit ext2_set_bit |
576 | #define ext4_set_bit_atomic ext2_set_bit_atomic | |
577 | #define ext4_clear_bit ext2_clear_bit | |
578 | #define ext4_clear_bit_atomic ext2_clear_bit_atomic | |
579 | #define ext4_test_bit ext2_test_bit | |
580 | #define ext4_find_first_zero_bit ext2_find_first_zero_bit | |
581 | #define ext4_find_next_zero_bit ext2_find_next_zero_bit | |
aa02ad67 | 582 | #define ext4_find_next_bit ext2_find_next_bit |
ac27a0ec DK |
583 | |
584 | /* | |
585 | * Maximal mount counts between two filesystem checks | |
586 | */ | |
617ba13b MC |
587 | #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
588 | #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ | |
ac27a0ec DK |
589 | |
590 | /* | |
591 | * Behaviour when detecting errors | |
592 | */ | |
617ba13b MC |
593 | #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ |
594 | #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ | |
595 | #define EXT4_ERRORS_PANIC 3 /* Panic */ | |
596 | #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE | |
ac27a0ec DK |
597 | |
598 | /* | |
599 | * Structure of the super block | |
600 | */ | |
617ba13b | 601 | struct ext4_super_block { |
ac27a0ec | 602 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
6bc9feff | 603 | __le32 s_blocks_count_lo; /* Blocks count */ |
308ba3ec AK |
604 | __le32 s_r_blocks_count_lo; /* Reserved blocks count */ |
605 | __le32 s_free_blocks_count_lo; /* Free blocks count */ | |
ac27a0ec DK |
606 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
607 | __le32 s_first_data_block; /* First Data Block */ | |
608 | __le32 s_log_block_size; /* Block size */ | |
f077d0d7 | 609 | __le32 s_obso_log_frag_size; /* Obsoleted fragment size */ |
ac27a0ec | 610 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
f077d0d7 | 611 | __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */ |
ac27a0ec DK |
612 | __le32 s_inodes_per_group; /* # Inodes per group */ |
613 | __le32 s_mtime; /* Mount time */ | |
614 | /*30*/ __le32 s_wtime; /* Write time */ | |
615 | __le16 s_mnt_count; /* Mount count */ | |
616 | __le16 s_max_mnt_count; /* Maximal mount count */ | |
617 | __le16 s_magic; /* Magic signature */ | |
618 | __le16 s_state; /* File system state */ | |
619 | __le16 s_errors; /* Behaviour when detecting errors */ | |
620 | __le16 s_minor_rev_level; /* minor revision level */ | |
621 | /*40*/ __le32 s_lastcheck; /* time of last check */ | |
622 | __le32 s_checkinterval; /* max. time between checks */ | |
623 | __le32 s_creator_os; /* OS */ | |
624 | __le32 s_rev_level; /* Revision level */ | |
625 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ | |
626 | __le16 s_def_resgid; /* Default gid for reserved blocks */ | |
627 | /* | |
617ba13b | 628 | * These fields are for EXT4_DYNAMIC_REV superblocks only. |
ac27a0ec DK |
629 | * |
630 | * Note: the difference between the compatible feature set and | |
631 | * the incompatible feature set is that if there is a bit set | |
632 | * in the incompatible feature set that the kernel doesn't | |
633 | * know about, it should refuse to mount the filesystem. | |
634 | * | |
635 | * e2fsck's requirements are more strict; if it doesn't know | |
636 | * about a feature in either the compatible or incompatible | |
637 | * feature set, it must abort and not try to meddle with | |
638 | * things it doesn't understand... | |
639 | */ | |
640 | __le32 s_first_ino; /* First non-reserved inode */ | |
0d1ee42f | 641 | __le16 s_inode_size; /* size of inode structure */ |
ac27a0ec DK |
642 | __le16 s_block_group_nr; /* block group # of this superblock */ |
643 | __le32 s_feature_compat; /* compatible feature set */ | |
644 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ | |
645 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ | |
646 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ | |
647 | /*78*/ char s_volume_name[16]; /* volume name */ | |
648 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ | |
649 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ | |
650 | /* | |
651 | * Performance hints. Directory preallocation should only | |
617ba13b | 652 | * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
ac27a0ec DK |
653 | */ |
654 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ | |
655 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ | |
656 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ | |
657 | /* | |
617ba13b | 658 | * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
ac27a0ec DK |
659 | */ |
660 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ | |
661 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ | |
662 | __le32 s_journal_dev; /* device number of journal file */ | |
663 | __le32 s_last_orphan; /* start of list of inodes to delete */ | |
664 | __le32 s_hash_seed[4]; /* HTREE hash seed */ | |
665 | __u8 s_def_hash_version; /* Default hash version to use */ | |
666 | __u8 s_reserved_char_pad; | |
0d1ee42f | 667 | __le16 s_desc_size; /* size of group descriptor */ |
bd81d8ee | 668 | /*100*/ __le32 s_default_mount_opts; |
ac27a0ec | 669 | __le32 s_first_meta_bg; /* First metablock block group */ |
bd81d8ee LV |
670 | __le32 s_mkfs_time; /* When the filesystem was created */ |
671 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ | |
672 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ | |
673 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ | |
674 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ | |
675 | __le32 s_free_blocks_count_hi; /* Free blocks count */ | |
c1bddad9 AK |
676 | __le16 s_min_extra_isize; /* All inodes have at least # bytes */ |
677 | __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ | |
678 | __le32 s_flags; /* Miscellaneous flags */ | |
679 | __le16 s_raid_stride; /* RAID stride */ | |
680 | __le16 s_mmp_interval; /* # seconds to wait in MMP checking */ | |
681 | __le64 s_mmp_block; /* Block for multi-mount protection */ | |
682 | __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ | |
772cb7c8 JS |
683 | __u8 s_log_groups_per_flex; /* FLEX_BG group size */ |
684 | __u8 s_reserved_char_pad2; | |
685 | __le16 s_reserved_pad; | |
afc32f7e TT |
686 | __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ |
687 | __u32 s_reserved[160]; /* Padding to the end of the block */ | |
ac27a0ec DK |
688 | }; |
689 | ||
690 | #ifdef __KERNEL__ | |
af5bc92d | 691 | static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) |
ac27a0ec DK |
692 | { |
693 | return sb->s_fs_info; | |
694 | } | |
617ba13b | 695 | static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
ac27a0ec | 696 | { |
617ba13b | 697 | return container_of(inode, struct ext4_inode_info, vfs_inode); |
ac27a0ec DK |
698 | } |
699 | ||
ef7f3835 KS |
700 | static inline struct timespec ext4_current_time(struct inode *inode) |
701 | { | |
702 | return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ? | |
703 | current_fs_time(inode->i_sb) : CURRENT_TIME_SEC; | |
704 | } | |
705 | ||
706 | ||
617ba13b | 707 | static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) |
ac27a0ec | 708 | { |
617ba13b MC |
709 | return ino == EXT4_ROOT_INO || |
710 | ino == EXT4_JOURNAL_INO || | |
711 | ino == EXT4_RESIZE_INO || | |
712 | (ino >= EXT4_FIRST_INO(sb) && | |
713 | ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); | |
ac27a0ec DK |
714 | } |
715 | #else | |
617ba13b | 716 | /* Assume that user mode programs are passing in an ext4fs superblock, not |
ac27a0ec DK |
717 | * a kernel struct super_block. This will allow us to call the feature-test |
718 | * macros from user land. */ | |
617ba13b | 719 | #define EXT4_SB(sb) (sb) |
ac27a0ec DK |
720 | #endif |
721 | ||
617ba13b | 722 | #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
ac27a0ec DK |
723 | |
724 | /* | |
725 | * Codes for operating systems | |
726 | */ | |
617ba13b MC |
727 | #define EXT4_OS_LINUX 0 |
728 | #define EXT4_OS_HURD 1 | |
729 | #define EXT4_OS_MASIX 2 | |
730 | #define EXT4_OS_FREEBSD 3 | |
731 | #define EXT4_OS_LITES 4 | |
ac27a0ec DK |
732 | |
733 | /* | |
734 | * Revision levels | |
735 | */ | |
617ba13b MC |
736 | #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ |
737 | #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ | |
ac27a0ec | 738 | |
617ba13b MC |
739 | #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV |
740 | #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV | |
ac27a0ec | 741 | |
617ba13b | 742 | #define EXT4_GOOD_OLD_INODE_SIZE 128 |
ac27a0ec DK |
743 | |
744 | /* | |
745 | * Feature set definitions | |
746 | */ | |
747 | ||
617ba13b | 748 | #define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ |
3a06d778 | 749 | ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0) |
617ba13b | 750 | #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
3a06d778 | 751 | ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0) |
617ba13b | 752 | #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ |
3a06d778 | 753 | ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0) |
617ba13b MC |
754 | #define EXT4_SET_COMPAT_FEATURE(sb,mask) \ |
755 | EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) | |
756 | #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ | |
757 | EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) | |
758 | #define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ | |
759 | EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) | |
760 | #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ | |
761 | EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) | |
762 | #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ | |
763 | EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) | |
764 | #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ | |
765 | EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) | |
766 | ||
767 | #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 | |
768 | #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 | |
769 | #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 | |
770 | #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 | |
771 | #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 | |
772 | #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 | |
773 | ||
774 | #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 | |
775 | #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 | |
776 | #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 | |
0fc1b451 | 777 | #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 |
717d50e4 | 778 | #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 |
f8628a14 | 779 | #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 |
ef7f3835 | 780 | #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 |
617ba13b MC |
781 | |
782 | #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 | |
783 | #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 | |
784 | #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ | |
785 | #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ | |
786 | #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 | |
a86c6181 | 787 | #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
bd81d8ee | 788 | #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 |
0fc1b451 | 789 | #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 |
ce421581 | 790 | #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 |
617ba13b MC |
791 | |
792 | #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR | |
793 | #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ | |
794 | EXT4_FEATURE_INCOMPAT_RECOVER| \ | |
a86c6181 | 795 | EXT4_FEATURE_INCOMPAT_META_BG| \ |
bd81d8ee | 796 | EXT4_FEATURE_INCOMPAT_EXTENTS| \ |
ce421581 JS |
797 | EXT4_FEATURE_INCOMPAT_64BIT| \ |
798 | EXT4_FEATURE_INCOMPAT_FLEX_BG) | |
617ba13b MC |
799 | #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
800 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
717d50e4 | 801 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ |
f8628a14 | 802 | EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ |
ef7f3835 | 803 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ |
0fc1b451 AK |
804 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ |
805 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE) | |
ac27a0ec DK |
806 | |
807 | /* | |
808 | * Default values for user and/or group using reserved blocks | |
809 | */ | |
617ba13b MC |
810 | #define EXT4_DEF_RESUID 0 |
811 | #define EXT4_DEF_RESGID 0 | |
ac27a0ec | 812 | |
240799cd TT |
813 | #define EXT4_DEF_INODE_READAHEAD_BLKS 32 |
814 | ||
ac27a0ec DK |
815 | /* |
816 | * Default mount options | |
817 | */ | |
617ba13b MC |
818 | #define EXT4_DEFM_DEBUG 0x0001 |
819 | #define EXT4_DEFM_BSDGROUPS 0x0002 | |
820 | #define EXT4_DEFM_XATTR_USER 0x0004 | |
821 | #define EXT4_DEFM_ACL 0x0008 | |
822 | #define EXT4_DEFM_UID16 0x0010 | |
823 | #define EXT4_DEFM_JMODE 0x0060 | |
824 | #define EXT4_DEFM_JMODE_DATA 0x0020 | |
825 | #define EXT4_DEFM_JMODE_ORDERED 0x0040 | |
826 | #define EXT4_DEFM_JMODE_WBACK 0x0060 | |
ac27a0ec | 827 | |
30773840 TT |
828 | /* |
829 | * Default journal batch times | |
830 | */ | |
831 | #define EXT4_DEF_MIN_BATCH_TIME 0 | |
832 | #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ | |
833 | ||
a4912123 TT |
834 | /* |
835 | * Minimum number of groups in a flexgroup before we separate out | |
836 | * directories into the first block group of a flexgroup | |
837 | */ | |
838 | #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 | |
839 | ||
ac27a0ec DK |
840 | /* |
841 | * Structure of a directory entry | |
842 | */ | |
617ba13b | 843 | #define EXT4_NAME_LEN 255 |
ac27a0ec | 844 | |
617ba13b | 845 | struct ext4_dir_entry { |
ac27a0ec DK |
846 | __le32 inode; /* Inode number */ |
847 | __le16 rec_len; /* Directory entry length */ | |
848 | __le16 name_len; /* Name length */ | |
617ba13b | 849 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
850 | }; |
851 | ||
852 | /* | |
617ba13b | 853 | * The new version of the directory entry. Since EXT4 structures are |
ac27a0ec DK |
854 | * stored in intel byte order, and the name_len field could never be |
855 | * bigger than 255 chars, it's safe to reclaim the extra byte for the | |
856 | * file_type field. | |
857 | */ | |
617ba13b | 858 | struct ext4_dir_entry_2 { |
ac27a0ec DK |
859 | __le32 inode; /* Inode number */ |
860 | __le16 rec_len; /* Directory entry length */ | |
861 | __u8 name_len; /* Name length */ | |
862 | __u8 file_type; | |
617ba13b | 863 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
864 | }; |
865 | ||
866 | /* | |
617ba13b | 867 | * Ext4 directory file types. Only the low 3 bits are used. The |
ac27a0ec DK |
868 | * other bits are reserved for now. |
869 | */ | |
617ba13b MC |
870 | #define EXT4_FT_UNKNOWN 0 |
871 | #define EXT4_FT_REG_FILE 1 | |
872 | #define EXT4_FT_DIR 2 | |
873 | #define EXT4_FT_CHRDEV 3 | |
874 | #define EXT4_FT_BLKDEV 4 | |
875 | #define EXT4_FT_FIFO 5 | |
876 | #define EXT4_FT_SOCK 6 | |
877 | #define EXT4_FT_SYMLINK 7 | |
ac27a0ec | 878 | |
617ba13b | 879 | #define EXT4_FT_MAX 8 |
ac27a0ec DK |
880 | |
881 | /* | |
617ba13b | 882 | * EXT4_DIR_PAD defines the directory entries boundaries |
ac27a0ec DK |
883 | * |
884 | * NOTE: It must be a multiple of 4 | |
885 | */ | |
617ba13b MC |
886 | #define EXT4_DIR_PAD 4 |
887 | #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) | |
888 | #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ | |
889 | ~EXT4_DIR_ROUND) | |
a72d7f83 JK |
890 | #define EXT4_MAX_REC_LEN ((1<<16)-1) |
891 | ||
ac27a0ec DK |
892 | /* |
893 | * Hash Tree Directory indexing | |
894 | * (c) Daniel Phillips, 2001 | |
895 | */ | |
896 | ||
4074fe37 ES |
897 | #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ |
898 | EXT4_FEATURE_COMPAT_DIR_INDEX) && \ | |
617ba13b MC |
899 | (EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) |
900 | #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) | |
901 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) | |
ac27a0ec DK |
902 | |
903 | /* Legal values for the dx_root hash_version field: */ | |
904 | ||
905 | #define DX_HASH_LEGACY 0 | |
906 | #define DX_HASH_HALF_MD4 1 | |
907 | #define DX_HASH_TEA 2 | |
f99b2589 TT |
908 | #define DX_HASH_LEGACY_UNSIGNED 3 |
909 | #define DX_HASH_HALF_MD4_UNSIGNED 4 | |
910 | #define DX_HASH_TEA_UNSIGNED 5 | |
ac27a0ec DK |
911 | |
912 | #ifdef __KERNEL__ | |
913 | ||
914 | /* hash info structure used by the directory hash */ | |
915 | struct dx_hash_info | |
916 | { | |
917 | u32 hash; | |
918 | u32 minor_hash; | |
919 | int hash_version; | |
920 | u32 *seed; | |
921 | }; | |
922 | ||
617ba13b | 923 | #define EXT4_HTREE_EOF 0x7fffffff |
ac27a0ec DK |
924 | |
925 | /* | |
617ba13b | 926 | * Control parameters used by ext4_htree_next_block |
ac27a0ec DK |
927 | */ |
928 | #define HASH_NB_ALWAYS 1 | |
929 | ||
930 | ||
931 | /* | |
932 | * Describe an inode's exact location on disk and in memory | |
933 | */ | |
617ba13b | 934 | struct ext4_iloc |
ac27a0ec DK |
935 | { |
936 | struct buffer_head *bh; | |
937 | unsigned long offset; | |
fd2d4291 | 938 | ext4_group_t block_group; |
ac27a0ec DK |
939 | }; |
940 | ||
617ba13b | 941 | static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
ac27a0ec | 942 | { |
617ba13b | 943 | return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
ac27a0ec DK |
944 | } |
945 | ||
946 | /* | |
947 | * This structure is stuffed into the struct file's private_data field | |
948 | * for directories. It is where we put information so that we can do | |
949 | * readdir operations in hash tree order. | |
950 | */ | |
951 | struct dir_private_info { | |
952 | struct rb_root root; | |
953 | struct rb_node *curr_node; | |
954 | struct fname *extra_fname; | |
955 | loff_t last_pos; | |
956 | __u32 curr_hash; | |
957 | __u32 curr_minor_hash; | |
958 | __u32 next_hash; | |
959 | }; | |
960 | ||
961 | /* calculate the first block number of the group */ | |
617ba13b | 962 | static inline ext4_fsblk_t |
fd2d4291 | 963 | ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) |
ac27a0ec | 964 | { |
617ba13b MC |
965 | return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + |
966 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); | |
ac27a0ec DK |
967 | } |
968 | ||
969 | /* | |
970 | * Special error return code only used by dx_probe() and its callers. | |
971 | */ | |
972 | #define ERR_BAD_DX_DIR -75000 | |
973 | ||
72b64b59 | 974 | void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr, |
a9df9a49 | 975 | ext4_group_t *blockgrpp, ext4_grpblk_t *offsetp); |
3a5b2ecd | 976 | |
9f6200bb TT |
977 | extern struct proc_dir_entry *ext4_proc_root; |
978 | ||
ac27a0ec DK |
979 | /* |
980 | * Function prototypes | |
981 | */ | |
982 | ||
983 | /* | |
984 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
617ba13b | 985 | * ext4 source programs needs to include it so they are duplicated here. |
ac27a0ec | 986 | */ |
8c55e204 DK |
987 | # define NORET_TYPE /**/ |
988 | # define ATTRIB_NORET __attribute__((noreturn)) | |
989 | # define NORET_AND noreturn, | |
ac27a0ec | 990 | |
498e5f24 TT |
991 | /* bitmap.c */ |
992 | extern unsigned int ext4_count_free(struct buffer_head *, unsigned); | |
993 | ||
ac27a0ec | 994 | /* balloc.c */ |
3a5b2ecd MC |
995 | extern unsigned int ext4_block_group(struct super_block *sb, |
996 | ext4_fsblk_t blocknr); | |
997 | extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, | |
998 | ext4_fsblk_t blocknr); | |
fd2d4291 AM |
999 | extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); |
1000 | extern unsigned long ext4_bg_num_gdb(struct super_block *sb, | |
1001 | ext4_group_t group); | |
7061eba7 | 1002 | extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, |
617ba13b | 1003 | ext4_fsblk_t goal, unsigned long *count, int *errp); |
5c791616 | 1004 | extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); |
8c3bf8a0 | 1005 | extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); |
af5bc92d | 1006 | extern void ext4_free_blocks(handle_t *handle, struct inode *inode, |
c9de560d | 1007 | ext4_fsblk_t block, unsigned long count, int metadata); |
e21675d4 AK |
1008 | extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, |
1009 | ext4_fsblk_t block, unsigned long count); | |
af5bc92d TT |
1010 | extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *); |
1011 | extern void ext4_check_blocks_bitmap(struct super_block *); | |
617ba13b | 1012 | extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, |
fd2d4291 | 1013 | ext4_group_t block_group, |
ac27a0ec | 1014 | struct buffer_head ** bh); |
617ba13b | 1015 | extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
ac27a0ec DK |
1016 | |
1017 | /* dir.c */ | |
617ba13b MC |
1018 | extern int ext4_check_dir_entry(const char *, struct inode *, |
1019 | struct ext4_dir_entry_2 *, | |
498e5f24 | 1020 | struct buffer_head *, unsigned int); |
617ba13b | 1021 | extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
ac27a0ec | 1022 | __u32 minor_hash, |
617ba13b MC |
1023 | struct ext4_dir_entry_2 *dirent); |
1024 | extern void ext4_htree_free_dir_info(struct dir_private_info *p); | |
ac27a0ec DK |
1025 | |
1026 | /* fsync.c */ | |
af5bc92d | 1027 | extern int ext4_sync_file(struct file *, struct dentry *, int); |
ac27a0ec DK |
1028 | |
1029 | /* hash.c */ | |
617ba13b | 1030 | extern int ext4fs_dirhash(const char *name, int len, struct |
ac27a0ec DK |
1031 | dx_hash_info *hinfo); |
1032 | ||
1033 | /* ialloc.c */ | |
af5bc92d TT |
1034 | extern struct inode * ext4_new_inode(handle_t *, struct inode *, int); |
1035 | extern void ext4_free_inode(handle_t *, struct inode *); | |
1036 | extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); | |
1037 | extern unsigned long ext4_count_free_inodes(struct super_block *); | |
1038 | extern unsigned long ext4_count_dirs(struct super_block *); | |
1039 | extern void ext4_check_inodes_bitmap(struct super_block *); | |
ac27a0ec | 1040 | |
c9de560d AT |
1041 | /* mballoc.c */ |
1042 | extern long ext4_mb_stats; | |
1043 | extern long ext4_mb_max_to_scan; | |
1044 | extern int ext4_mb_init(struct super_block *, int); | |
1045 | extern int ext4_mb_release(struct super_block *); | |
1046 | extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, | |
1047 | struct ext4_allocation_request *, int *); | |
1048 | extern int ext4_mb_reserve_blocks(struct super_block *, int); | |
c2ea3fde | 1049 | extern void ext4_discard_preallocations(struct inode *); |
c9de560d AT |
1050 | extern int __init init_ext4_mballoc(void); |
1051 | extern void exit_ext4_mballoc(void); | |
1052 | extern void ext4_mb_free_blocks(handle_t *, struct inode *, | |
1053 | unsigned long, unsigned long, int, unsigned long *); | |
920313a7 | 1054 | extern int ext4_mb_add_groupinfo(struct super_block *sb, |
5f21b0e6 FB |
1055 | ext4_group_t i, struct ext4_group_desc *desc); |
1056 | extern void ext4_mb_update_group_info(struct ext4_group_info *grp, | |
1057 | ext4_grpblk_t add); | |
920313a7 AK |
1058 | extern int ext4_mb_get_buddy_cache_lock(struct super_block *, ext4_group_t); |
1059 | extern void ext4_mb_put_buddy_cache_lock(struct super_block *, | |
1060 | ext4_group_t, int); | |
ac27a0ec | 1061 | /* inode.c */ |
617ba13b MC |
1062 | int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, |
1063 | struct buffer_head *bh, ext4_fsblk_t blocknr); | |
725d26d3 AK |
1064 | struct buffer_head *ext4_getblk(handle_t *, struct inode *, |
1065 | ext4_lblk_t, int, int *); | |
1066 | struct buffer_head *ext4_bread(handle_t *, struct inode *, | |
1067 | ext4_lblk_t, int, int *); | |
6873fa0d ES |
1068 | int ext4_get_block(struct inode *inode, sector_t iblock, |
1069 | struct buffer_head *bh_result, int create); | |
ac27a0ec | 1070 | |
1d1fe1ee | 1071 | extern struct inode *ext4_iget(struct super_block *, unsigned long); |
af5bc92d TT |
1072 | extern int ext4_write_inode(struct inode *, int); |
1073 | extern int ext4_setattr(struct dentry *, struct iattr *); | |
3e3398a0 MC |
1074 | extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, |
1075 | struct kstat *stat); | |
af5bc92d TT |
1076 | extern void ext4_delete_inode(struct inode *); |
1077 | extern int ext4_sync_inode(handle_t *, struct inode *); | |
617ba13b MC |
1078 | extern void ext4_dirty_inode(struct inode *); |
1079 | extern int ext4_change_inode_journal_flag(struct inode *, int); | |
1080 | extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); | |
91ef4caf | 1081 | extern int ext4_can_truncate(struct inode *inode); |
af5bc92d | 1082 | extern void ext4_truncate(struct inode *); |
617ba13b | 1083 | extern void ext4_set_inode_flags(struct inode *); |
ff9ddf7e | 1084 | extern void ext4_get_inode_flags(struct ext4_inode_info *); |
ccd2506b | 1085 | extern int ext4_alloc_da_blocks(struct inode *inode); |
617ba13b | 1086 | extern void ext4_set_aops(struct inode *inode); |
a86c6181 | 1087 | extern int ext4_writepage_trans_blocks(struct inode *); |
a02908f1 | 1088 | extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int idxblocks); |
f3bd1f3f | 1089 | extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); |
cf108bca | 1090 | extern int ext4_block_truncate_page(handle_t *handle, |
a86c6181 | 1091 | struct address_space *mapping, loff_t from); |
2e9ee850 | 1092 | extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
60e58e0f | 1093 | extern qsize_t ext4_get_reserved_space(struct inode *inode); |
ac27a0ec DK |
1094 | |
1095 | /* ioctl.c */ | |
5cdd7b2d | 1096 | extern long ext4_ioctl(struct file *, unsigned int, unsigned long); |
af5bc92d | 1097 | extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); |
ac27a0ec | 1098 | |
c14c6fd5 | 1099 | /* migrate.c */ |
2a43a878 | 1100 | extern int ext4_ext_migrate(struct inode *); |
3d0518f4 | 1101 | |
ac27a0ec | 1102 | /* namei.c */ |
3d0518f4 WY |
1103 | extern unsigned int ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize); |
1104 | extern __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize); | |
617ba13b MC |
1105 | extern int ext4_orphan_add(handle_t *, struct inode *); |
1106 | extern int ext4_orphan_del(handle_t *, struct inode *); | |
1107 | extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, | |
ac27a0ec DK |
1108 | __u32 start_minor_hash, __u32 *next_hash); |
1109 | ||
1110 | /* resize.c */ | |
617ba13b MC |
1111 | extern int ext4_group_add(struct super_block *sb, |
1112 | struct ext4_new_group_data *input); | |
1113 | extern int ext4_group_extend(struct super_block *sb, | |
1114 | struct ext4_super_block *es, | |
1115 | ext4_fsblk_t n_blocks_count); | |
ac27a0ec DK |
1116 | |
1117 | /* super.c */ | |
af5bc92d | 1118 | extern void ext4_error(struct super_block *, const char *, const char *, ...) |
ac27a0ec | 1119 | __attribute__ ((format (printf, 3, 4))); |
af5bc92d TT |
1120 | extern void __ext4_std_error(struct super_block *, const char *, int); |
1121 | extern void ext4_abort(struct super_block *, const char *, const char *, ...) | |
ac27a0ec | 1122 | __attribute__ ((format (printf, 3, 4))); |
af5bc92d | 1123 | extern void ext4_warning(struct super_block *, const char *, const char *, ...) |
ac27a0ec | 1124 | __attribute__ ((format (printf, 3, 4))); |
5d1b1b3f AK |
1125 | extern void ext4_grp_locked_error(struct super_block *, ext4_group_t, |
1126 | const char *, const char *, ...) | |
1127 | __attribute__ ((format (printf, 4, 5))); | |
af5bc92d | 1128 | extern void ext4_update_dynamic_rev(struct super_block *sb); |
99e6f829 AK |
1129 | extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, |
1130 | __u32 compat); | |
1131 | extern int ext4_update_rocompat_feature(handle_t *handle, | |
1132 | struct super_block *sb, __u32 rocompat); | |
1133 | extern int ext4_update_incompat_feature(handle_t *handle, | |
1134 | struct super_block *sb, __u32 incompat); | |
8fadc143 AR |
1135 | extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
1136 | struct ext4_group_desc *bg); | |
1137 | extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, | |
1138 | struct ext4_group_desc *bg); | |
1139 | extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, | |
1140 | struct ext4_group_desc *bg); | |
560671a0 AK |
1141 | extern __u32 ext4_free_blks_count(struct super_block *sb, |
1142 | struct ext4_group_desc *bg); | |
1143 | extern __u32 ext4_free_inodes_count(struct super_block *sb, | |
1144 | struct ext4_group_desc *bg); | |
1145 | extern __u32 ext4_used_dirs_count(struct super_block *sb, | |
1146 | struct ext4_group_desc *bg); | |
1147 | extern __u32 ext4_itable_unused_count(struct super_block *sb, | |
1148 | struct ext4_group_desc *bg); | |
8fadc143 AR |
1149 | extern void ext4_block_bitmap_set(struct super_block *sb, |
1150 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
1151 | extern void ext4_inode_bitmap_set(struct super_block *sb, | |
1152 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
1153 | extern void ext4_inode_table_set(struct super_block *sb, | |
1154 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
560671a0 AK |
1155 | extern void ext4_free_blks_set(struct super_block *sb, |
1156 | struct ext4_group_desc *bg, __u32 count); | |
1157 | extern void ext4_free_inodes_set(struct super_block *sb, | |
1158 | struct ext4_group_desc *bg, __u32 count); | |
1159 | extern void ext4_used_dirs_set(struct super_block *sb, | |
1160 | struct ext4_group_desc *bg, __u32 count); | |
1161 | extern void ext4_itable_unused_set(struct super_block *sb, | |
1162 | struct ext4_group_desc *bg, __u32 count); | |
bd81d8ee LV |
1163 | |
1164 | static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) | |
1165 | { | |
1166 | return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | | |
6bc9feff | 1167 | le32_to_cpu(es->s_blocks_count_lo); |
bd81d8ee LV |
1168 | } |
1169 | ||
1170 | static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) | |
1171 | { | |
1172 | return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | | |
308ba3ec | 1173 | le32_to_cpu(es->s_r_blocks_count_lo); |
bd81d8ee LV |
1174 | } |
1175 | ||
1176 | static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) | |
1177 | { | |
1178 | return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | | |
308ba3ec | 1179 | le32_to_cpu(es->s_free_blocks_count_lo); |
bd81d8ee LV |
1180 | } |
1181 | ||
1182 | static inline void ext4_blocks_count_set(struct ext4_super_block *es, | |
1183 | ext4_fsblk_t blk) | |
1184 | { | |
6bc9feff | 1185 | es->s_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
1186 | es->s_blocks_count_hi = cpu_to_le32(blk >> 32); |
1187 | } | |
1188 | ||
1189 | static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, | |
1190 | ext4_fsblk_t blk) | |
1191 | { | |
308ba3ec | 1192 | es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
1193 | es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); |
1194 | } | |
1195 | ||
1196 | static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, | |
1197 | ext4_fsblk_t blk) | |
1198 | { | |
308ba3ec | 1199 | es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
1200 | es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); |
1201 | } | |
1202 | ||
a48380f7 AK |
1203 | static inline loff_t ext4_isize(struct ext4_inode *raw_inode) |
1204 | { | |
06a279d6 TT |
1205 | if (S_ISREG(le16_to_cpu(raw_inode->i_mode))) |
1206 | return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | | |
1207 | le32_to_cpu(raw_inode->i_size_lo); | |
1208 | else | |
1209 | return (loff_t) le32_to_cpu(raw_inode->i_size_lo); | |
a48380f7 | 1210 | } |
bd81d8ee | 1211 | |
a48380f7 AK |
1212 | static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) |
1213 | { | |
1214 | raw_inode->i_size_lo = cpu_to_le32(i_size); | |
1215 | raw_inode->i_size_high = cpu_to_le32(i_size >> 32); | |
1216 | } | |
ac27a0ec | 1217 | |
c9de560d AT |
1218 | static inline |
1219 | struct ext4_group_info *ext4_get_group_info(struct super_block *sb, | |
af5bc92d | 1220 | ext4_group_t group) |
c9de560d AT |
1221 | { |
1222 | struct ext4_group_info ***grp_info; | |
1223 | long indexv, indexh; | |
1224 | grp_info = EXT4_SB(sb)->s_group_info; | |
1225 | indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); | |
1226 | indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); | |
1227 | return grp_info[indexv][indexh]; | |
1228 | } | |
1229 | ||
1230 | ||
772cb7c8 JS |
1231 | static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, |
1232 | ext4_group_t block_group) | |
1233 | { | |
1234 | return block_group >> sbi->s_log_groups_per_flex; | |
1235 | } | |
1236 | ||
1237 | static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) | |
1238 | { | |
1239 | return 1 << sbi->s_log_groups_per_flex; | |
1240 | } | |
1241 | ||
617ba13b | 1242 | #define ext4_std_error(sb, errno) \ |
ac27a0ec DK |
1243 | do { \ |
1244 | if ((errno)) \ | |
4db9c54a | 1245 | __ext4_std_error((sb), __func__, (errno)); \ |
ac27a0ec DK |
1246 | } while (0) |
1247 | ||
a30d542a | 1248 | #ifdef CONFIG_SMP |
179f7ebf | 1249 | /* Each CPU can accumulate percpu_counter_batch blocks in their local |
a30d542a | 1250 | * counters. So we need to make sure we have free blocks more |
179f7ebf | 1251 | * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. |
a30d542a | 1252 | */ |
179f7ebf | 1253 | #define EXT4_FREEBLOCKS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) |
a30d542a AK |
1254 | #else |
1255 | #define EXT4_FREEBLOCKS_WATERMARK 0 | |
1256 | #endif | |
1257 | ||
cf17fea6 AK |
1258 | static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) |
1259 | { | |
1260 | /* | |
1261 | * XXX: replace with spinlock if seen contended -bzzz | |
1262 | */ | |
1263 | down_write(&EXT4_I(inode)->i_data_sem); | |
1264 | if (newsize > EXT4_I(inode)->i_disksize) | |
1265 | EXT4_I(inode)->i_disksize = newsize; | |
1266 | up_write(&EXT4_I(inode)->i_data_sem); | |
1267 | return ; | |
1268 | } | |
a30d542a | 1269 | |
5d1b1b3f AK |
1270 | struct ext4_group_info { |
1271 | unsigned long bb_state; | |
1272 | struct rb_root bb_free_root; | |
1273 | unsigned short bb_first_free; | |
1274 | unsigned short bb_free; | |
1275 | unsigned short bb_fragments; | |
1276 | struct list_head bb_prealloc_list; | |
1277 | #ifdef DOUBLE_CHECK | |
1278 | void *bb_bitmap; | |
1279 | #endif | |
1280 | struct rw_semaphore alloc_sem; | |
1281 | unsigned short bb_counters[]; | |
1282 | }; | |
1283 | ||
1284 | #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 | |
1285 | #define EXT4_GROUP_INFO_LOCKED_BIT 1 | |
1286 | ||
1287 | #define EXT4_MB_GRP_NEED_INIT(grp) \ | |
1288 | (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) | |
1289 | ||
1290 | static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) | |
1291 | { | |
1292 | struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); | |
1293 | ||
1294 | bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state)); | |
1295 | } | |
1296 | ||
1297 | static inline void ext4_unlock_group(struct super_block *sb, | |
1298 | ext4_group_t group) | |
1299 | { | |
1300 | struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); | |
1301 | ||
1302 | bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state)); | |
1303 | } | |
1304 | ||
1305 | static inline int ext4_is_group_locked(struct super_block *sb, | |
1306 | ext4_group_t group) | |
1307 | { | |
1308 | struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); | |
1309 | ||
1310 | return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT, | |
1311 | &(grinfo->bb_state)); | |
1312 | } | |
1313 | ||
ac27a0ec DK |
1314 | /* |
1315 | * Inodes and files operations | |
1316 | */ | |
1317 | ||
1318 | /* dir.c */ | |
617ba13b | 1319 | extern const struct file_operations ext4_dir_operations; |
ac27a0ec DK |
1320 | |
1321 | /* file.c */ | |
c5ef1c42 | 1322 | extern const struct inode_operations ext4_file_inode_operations; |
617ba13b | 1323 | extern const struct file_operations ext4_file_operations; |
ac27a0ec DK |
1324 | |
1325 | /* namei.c */ | |
c5ef1c42 AV |
1326 | extern const struct inode_operations ext4_dir_inode_operations; |
1327 | extern const struct inode_operations ext4_special_inode_operations; | |
ac27a0ec DK |
1328 | |
1329 | /* symlink.c */ | |
c5ef1c42 AV |
1330 | extern const struct inode_operations ext4_symlink_inode_operations; |
1331 | extern const struct inode_operations ext4_fast_symlink_inode_operations; | |
ac27a0ec | 1332 | |
a86c6181 AT |
1333 | /* extents.c */ |
1334 | extern int ext4_ext_tree_init(handle_t *handle, struct inode *); | |
1335 | extern int ext4_ext_writepage_trans_blocks(struct inode *, int); | |
a02908f1 MC |
1336 | extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, |
1337 | int chunk); | |
a86c6181 | 1338 | extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, |
498e5f24 TT |
1339 | ext4_lblk_t iblock, unsigned int max_blocks, |
1340 | struct buffer_head *bh_result, | |
1341 | int create, int extend_disksize); | |
cf108bca | 1342 | extern void ext4_ext_truncate(struct inode *); |
a86c6181 AT |
1343 | extern void ext4_ext_init(struct super_block *); |
1344 | extern void ext4_ext_release(struct super_block *); | |
a2df2a63 AA |
1345 | extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, |
1346 | loff_t len); | |
0e855ac8 | 1347 | extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, |
498e5f24 | 1348 | sector_t block, unsigned int max_blocks, |
0e855ac8 | 1349 | struct buffer_head *bh, int create, |
d2a17637 | 1350 | int extend_disksize, int flag); |
3a06d778 AK |
1351 | extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1352 | __u64 start, __u64 len); | |
1353 | ||
2ccb5fb9 AK |
1354 | /* |
1355 | * Add new method to test wether block and inode bitmaps are properly | |
1356 | * initialized. With uninit_bg reading the block from disk is not enough | |
1357 | * to mark the bitmap uptodate. We need to also zero-out the bitmap | |
1358 | */ | |
1359 | #define BH_BITMAP_UPTODATE BH_JBDPrivateStart | |
1360 | ||
1361 | static inline int bitmap_uptodate(struct buffer_head *bh) | |
1362 | { | |
1363 | return (buffer_uptodate(bh) && | |
1364 | test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); | |
1365 | } | |
1366 | static inline void set_bitmap_uptodate(struct buffer_head *bh) | |
1367 | { | |
1368 | set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); | |
1369 | } | |
1370 | ||
ac27a0ec DK |
1371 | #endif /* __KERNEL__ */ |
1372 | ||
3dcf5451 | 1373 | #endif /* _EXT4_H */ |