Commit | Line | Data |
---|---|---|
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> |
3dcf5451 | 23 | #include "ext4_i.h" |
c9de560d | 24 | |
ac27a0ec | 25 | /* |
8a35694e | 26 | * The fourth extended filesystem constants/structures |
ac27a0ec DK |
27 | */ |
28 | ||
29 | /* | |
617ba13b | 30 | * Define EXT4FS_DEBUG to produce debug messages |
ac27a0ec | 31 | */ |
617ba13b | 32 | #undef EXT4FS_DEBUG |
ac27a0ec DK |
33 | |
34 | /* | |
617ba13b | 35 | * Define EXT4_RESERVATION to reserve data blocks for expanding files |
ac27a0ec | 36 | */ |
8c55e204 | 37 | #define EXT4_DEFAULT_RESERVE_BLOCKS 8 |
ac27a0ec | 38 | /*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */ |
8c55e204 | 39 | #define EXT4_MAX_RESERVE_BLOCKS 1027 |
617ba13b | 40 | #define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0 |
ac27a0ec DK |
41 | |
42 | /* | |
43 | * Debug code | |
44 | */ | |
617ba13b MC |
45 | #ifdef EXT4FS_DEBUG |
46 | #define ext4_debug(f, a...) \ | |
ac27a0ec | 47 | do { \ |
af5bc92d | 48 | printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
4db9c54a | 49 | __FILE__, __LINE__, __func__); \ |
af5bc92d | 50 | printk(KERN_DEBUG f, ## a); \ |
ac27a0ec DK |
51 | } while (0) |
52 | #else | |
617ba13b | 53 | #define ext4_debug(f, a...) do {} while (0) |
ac27a0ec DK |
54 | #endif |
55 | ||
c9de560d AT |
56 | #define EXT4_MULTIBLOCK_ALLOCATOR 1 |
57 | ||
58 | /* prefer goal again. length */ | |
59 | #define EXT4_MB_HINT_MERGE 1 | |
60 | /* blocks already reserved */ | |
61 | #define EXT4_MB_HINT_RESERVED 2 | |
62 | /* metadata is being allocated */ | |
63 | #define EXT4_MB_HINT_METADATA 4 | |
64 | /* first blocks in the file */ | |
65 | #define EXT4_MB_HINT_FIRST 8 | |
66 | /* search for the best chunk */ | |
67 | #define EXT4_MB_HINT_BEST 16 | |
68 | /* data is being allocated */ | |
69 | #define EXT4_MB_HINT_DATA 32 | |
70 | /* don't preallocate (for tails) */ | |
71 | #define EXT4_MB_HINT_NOPREALLOC 64 | |
72 | /* allocate for locality group */ | |
73 | #define EXT4_MB_HINT_GROUP_ALLOC 128 | |
74 | /* allocate goal blocks or none */ | |
75 | #define EXT4_MB_HINT_GOAL_ONLY 256 | |
76 | /* goal is meaningful */ | |
77 | #define EXT4_MB_HINT_TRY_GOAL 512 | |
d2a17637 MC |
78 | /* blocks already pre-reserved by delayed allocation */ |
79 | #define EXT4_MB_DELALLOC_RESERVED 1024 | |
80 | ||
c9de560d AT |
81 | |
82 | struct ext4_allocation_request { | |
83 | /* target inode for block we're allocating */ | |
84 | struct inode *inode; | |
85 | /* logical block in target inode */ | |
86 | ext4_lblk_t logical; | |
87 | /* phys. target (a hint) */ | |
88 | ext4_fsblk_t goal; | |
89 | /* the closest logical allocated block to the left */ | |
90 | ext4_lblk_t lleft; | |
91 | /* phys. block for ^^^ */ | |
92 | ext4_fsblk_t pleft; | |
93 | /* the closest logical allocated block to the right */ | |
94 | ext4_lblk_t lright; | |
95 | /* phys. block for ^^^ */ | |
96 | ext4_fsblk_t pright; | |
97 | /* how many blocks we want to allocate */ | |
498e5f24 | 98 | unsigned int len; |
c9de560d | 99 | /* flags. see above EXT4_MB_HINT_* */ |
498e5f24 | 100 | unsigned int flags; |
c9de560d AT |
101 | }; |
102 | ||
ac27a0ec DK |
103 | /* |
104 | * Special inodes numbers | |
105 | */ | |
617ba13b MC |
106 | #define EXT4_BAD_INO 1 /* Bad blocks inode */ |
107 | #define EXT4_ROOT_INO 2 /* Root inode */ | |
108 | #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ | |
109 | #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ | |
110 | #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ | |
111 | #define EXT4_JOURNAL_INO 8 /* Journal inode */ | |
ac27a0ec | 112 | |
617ba13b MC |
113 | /* First non-reserved inode for old ext4 filesystems */ |
114 | #define EXT4_GOOD_OLD_FIRST_INO 11 | |
ac27a0ec DK |
115 | |
116 | /* | |
117 | * Maximal count of links to a file | |
118 | */ | |
f8628a14 | 119 | #define EXT4_LINK_MAX 65000 |
ac27a0ec DK |
120 | |
121 | /* | |
122 | * Macro-instructions used to manage several block sizes | |
123 | */ | |
617ba13b | 124 | #define EXT4_MIN_BLOCK_SIZE 1024 |
afc7cbca TS |
125 | #define EXT4_MAX_BLOCK_SIZE 65536 |
126 | #define EXT4_MIN_BLOCK_LOG_SIZE 10 | |
ac27a0ec | 127 | #ifdef __KERNEL__ |
617ba13b | 128 | # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
ac27a0ec | 129 | #else |
617ba13b | 130 | # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
ac27a0ec | 131 | #endif |
af5bc92d | 132 | #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) |
ac27a0ec | 133 | #ifdef __KERNEL__ |
617ba13b | 134 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
ac27a0ec | 135 | #else |
617ba13b | 136 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
ac27a0ec DK |
137 | #endif |
138 | #ifdef __KERNEL__ | |
617ba13b MC |
139 | #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) |
140 | #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) | |
141 | #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) | |
ac27a0ec | 142 | #else |
617ba13b MC |
143 | #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
144 | EXT4_GOOD_OLD_INODE_SIZE : \ | |
ac27a0ec | 145 | (s)->s_inode_size) |
617ba13b MC |
146 | #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
147 | EXT4_GOOD_OLD_FIRST_INO : \ | |
ac27a0ec DK |
148 | (s)->s_first_ino) |
149 | #endif | |
a2df2a63 | 150 | #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) |
ac27a0ec | 151 | |
ac27a0ec DK |
152 | /* |
153 | * Structure of a blocks group descriptor | |
154 | */ | |
617ba13b | 155 | struct ext4_group_desc |
ac27a0ec | 156 | { |
3a14589c | 157 | __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ |
5272f837 AK |
158 | __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ |
159 | __le32 bg_inode_table_lo; /* Inodes table block */ | |
560671a0 AK |
160 | __le16 bg_free_blocks_count_lo;/* Free blocks count */ |
161 | __le16 bg_free_inodes_count_lo;/* Free inodes count */ | |
162 | __le16 bg_used_dirs_count_lo; /* Directories count */ | |
717d50e4 AD |
163 | __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ |
164 | __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */ | |
560671a0 | 165 | __le16 bg_itable_unused_lo; /* Unused inodes count */ |
717d50e4 | 166 | __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ |
8fadc143 AR |
167 | __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ |
168 | __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ | |
169 | __le32 bg_inode_table_hi; /* Inodes table block MSB */ | |
91b51a01 CL |
170 | __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ |
171 | __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ | |
172 | __le16 bg_used_dirs_count_hi; /* Directories count MSB */ | |
560671a0 | 173 | __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ |
91b51a01 | 174 | __u32 bg_reserved2[3]; |
ac27a0ec DK |
175 | }; |
176 | ||
772cb7c8 JS |
177 | /* |
178 | * Structure of a flex block group info | |
179 | */ | |
180 | ||
181 | struct flex_groups { | |
182 | __u32 free_inodes; | |
183 | __u32 free_blocks; | |
184 | }; | |
185 | ||
717d50e4 AD |
186 | #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ |
187 | #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ | |
188 | #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ | |
189 | ||
bd81d8ee | 190 | #ifdef __KERNEL__ |
3dcf5451 | 191 | #include "ext4_sb.h" |
bd81d8ee | 192 | #endif |
ac27a0ec DK |
193 | /* |
194 | * Macro-instructions used to manage group descriptors | |
195 | */ | |
0d1ee42f | 196 | #define EXT4_MIN_DESC_SIZE 32 |
8fadc143 | 197 | #define EXT4_MIN_DESC_SIZE_64BIT 64 |
0d1ee42f AR |
198 | #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE |
199 | #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) | |
ac27a0ec | 200 | #ifdef __KERNEL__ |
617ba13b MC |
201 | # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) |
202 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) | |
203 | # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) | |
204 | # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) | |
ac27a0ec | 205 | #else |
617ba13b | 206 | # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
0d1ee42f | 207 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) |
617ba13b | 208 | # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
ac27a0ec DK |
209 | #endif |
210 | ||
211 | /* | |
212 | * Constants relative to the data blocks | |
213 | */ | |
617ba13b MC |
214 | #define EXT4_NDIR_BLOCKS 12 |
215 | #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS | |
216 | #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) | |
217 | #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) | |
218 | #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) | |
ac27a0ec DK |
219 | |
220 | /* | |
221 | * Inode flags | |
222 | */ | |
617ba13b MC |
223 | #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ |
224 | #define EXT4_UNRM_FL 0x00000002 /* Undelete */ | |
225 | #define EXT4_COMPR_FL 0x00000004 /* Compress file */ | |
226 | #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ | |
227 | #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
228 | #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ | |
229 | #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ | |
230 | #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ | |
ac27a0ec | 231 | /* Reserved for compression usage... */ |
617ba13b MC |
232 | #define EXT4_DIRTY_FL 0x00000100 |
233 | #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
234 | #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ | |
235 | #define EXT4_ECOMPR_FL 0x00000800 /* Compression error */ | |
ac27a0ec | 236 | /* End compression flags --- maybe not all used */ |
617ba13b MC |
237 | #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ |
238 | #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ | |
239 | #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ | |
240 | #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
241 | #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
242 | #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
8180a562 | 243 | #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ |
a86c6181 | 244 | #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
267e4db9 | 245 | #define EXT4_EXT_MIGRATE 0x00100000 /* Inode is migrating */ |
8180a562 | 246 | #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ |
ac27a0ec | 247 | |
a86c6181 | 248 | #define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */ |
4db46fc2 | 249 | #define EXT4_FL_USER_MODIFIABLE 0x000B80FF /* User modifiable flags */ |
ac27a0ec DK |
250 | |
251 | /* | |
252 | * Inode dynamic state flags | |
253 | */ | |
617ba13b MC |
254 | #define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */ |
255 | #define EXT4_STATE_NEW 0x00000002 /* inode is newly created */ | |
256 | #define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */ | |
6dd4ee7c | 257 | #define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */ |
ac27a0ec DK |
258 | |
259 | /* Used to pass group descriptor data when online resize is done */ | |
617ba13b | 260 | struct ext4_new_group_input { |
8c55e204 DK |
261 | __u32 group; /* Group number for this data */ |
262 | __u64 block_bitmap; /* Absolute block number of block bitmap */ | |
263 | __u64 inode_bitmap; /* Absolute block number of inode bitmap */ | |
264 | __u64 inode_table; /* Absolute block number of inode table start */ | |
265 | __u32 blocks_count; /* Total number of blocks in this group */ | |
266 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
ac27a0ec DK |
267 | __u16 unused; |
268 | }; | |
269 | ||
617ba13b MC |
270 | /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ |
271 | struct ext4_new_group_data { | |
ac27a0ec | 272 | __u32 group; |
bd81d8ee LV |
273 | __u64 block_bitmap; |
274 | __u64 inode_bitmap; | |
275 | __u64 inode_table; | |
ac27a0ec DK |
276 | __u32 blocks_count; |
277 | __u16 reserved_blocks; | |
278 | __u16 unused; | |
279 | __u32 free_blocks_count; | |
280 | }; | |
281 | ||
a2df2a63 AA |
282 | /* |
283 | * Following is used by preallocation code to tell get_blocks() that we | |
284 | * want uninitialzed extents. | |
285 | */ | |
286 | #define EXT4_CREATE_UNINITIALIZED_EXT 2 | |
ac27a0ec DK |
287 | |
288 | /* | |
289 | * ioctl commands | |
290 | */ | |
617ba13b MC |
291 | #define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS |
292 | #define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS | |
293 | #define EXT4_IOC_GETVERSION _IOR('f', 3, long) | |
294 | #define EXT4_IOC_SETVERSION _IOW('f', 4, long) | |
617ba13b MC |
295 | #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
296 | #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION | |
e23291b9 | 297 | #ifdef CONFIG_JBD2_DEBUG |
617ba13b | 298 | #define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long) |
ac27a0ec | 299 | #endif |
617ba13b MC |
300 | #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) |
301 | #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) | |
8eea80d5 TT |
302 | #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) |
303 | #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) | |
304 | #define EXT4_IOC_MIGRATE _IO('f', 9) | |
305 | /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ | |
ac27a0ec DK |
306 | |
307 | /* | |
308 | * ioctl commands in 32 bit emulation | |
309 | */ | |
617ba13b MC |
310 | #define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS |
311 | #define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS | |
312 | #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) | |
313 | #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) | |
314 | #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) | |
315 | #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) | |
316 | #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | |
e23291b9 | 317 | #ifdef CONFIG_JBD2_DEBUG |
617ba13b | 318 | #define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int) |
ac27a0ec | 319 | #endif |
617ba13b MC |
320 | #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
321 | #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | |
ac27a0ec DK |
322 | |
323 | ||
324 | /* | |
325 | * Mount options | |
326 | */ | |
617ba13b | 327 | struct ext4_mount_options { |
ac27a0ec DK |
328 | unsigned long s_mount_opt; |
329 | uid_t s_resuid; | |
330 | gid_t s_resgid; | |
331 | unsigned long s_commit_interval; | |
30773840 | 332 | u32 s_min_batch_time, s_max_batch_time; |
ac27a0ec DK |
333 | #ifdef CONFIG_QUOTA |
334 | int s_jquota_fmt; | |
335 | char *s_qf_names[MAXQUOTAS]; | |
336 | #endif | |
337 | }; | |
338 | ||
339 | /* | |
340 | * Structure of an inode on the disk | |
341 | */ | |
617ba13b | 342 | struct ext4_inode { |
ac27a0ec DK |
343 | __le16 i_mode; /* File mode */ |
344 | __le16 i_uid; /* Low 16 bits of Owner Uid */ | |
a48380f7 | 345 | __le32 i_size_lo; /* Size in bytes */ |
ac27a0ec | 346 | __le32 i_atime; /* Access time */ |
ef7f3835 | 347 | __le32 i_ctime; /* Inode Change time */ |
ac27a0ec DK |
348 | __le32 i_mtime; /* Modification time */ |
349 | __le32 i_dtime; /* Deletion Time */ | |
350 | __le16 i_gid; /* Low 16 bits of Group Id */ | |
351 | __le16 i_links_count; /* Links count */ | |
0fc1b451 | 352 | __le32 i_blocks_lo; /* Blocks count */ |
ac27a0ec DK |
353 | __le32 i_flags; /* File flags */ |
354 | union { | |
355 | struct { | |
25ec56b5 | 356 | __le32 l_i_version; |
ac27a0ec DK |
357 | } linux1; |
358 | struct { | |
359 | __u32 h_i_translator; | |
360 | } hurd1; | |
361 | struct { | |
362 | __u32 m_i_reserved1; | |
363 | } masix1; | |
364 | } osd1; /* OS dependent 1 */ | |
617ba13b | 365 | __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
ac27a0ec | 366 | __le32 i_generation; /* File version (for NFS) */ |
7973c0c1 | 367 | __le32 i_file_acl_lo; /* File ACL */ |
a48380f7 | 368 | __le32 i_size_high; |
f077d0d7 | 369 | __le32 i_obso_faddr; /* Obsoleted fragment address */ |
ac27a0ec DK |
370 | union { |
371 | struct { | |
0fc1b451 | 372 | __le16 l_i_blocks_high; /* were l_i_reserved1 */ |
a1ddeb7e | 373 | __le16 l_i_file_acl_high; |
8c55e204 | 374 | __le16 l_i_uid_high; /* these 2 fields */ |
ac27a0ec DK |
375 | __le16 l_i_gid_high; /* were reserved2[0] */ |
376 | __u32 l_i_reserved2; | |
377 | } linux2; | |
378 | struct { | |
f077d0d7 | 379 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
ac27a0ec DK |
380 | __u16 h_i_mode_high; |
381 | __u16 h_i_uid_high; | |
382 | __u16 h_i_gid_high; | |
383 | __u32 h_i_author; | |
384 | } hurd2; | |
385 | struct { | |
f077d0d7 | 386 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
a1ddeb7e | 387 | __le16 m_i_file_acl_high; |
ac27a0ec DK |
388 | __u32 m_i_reserved2[2]; |
389 | } masix2; | |
390 | } osd2; /* OS dependent 2 */ | |
391 | __le16 i_extra_isize; | |
392 | __le16 i_pad1; | |
ef7f3835 KS |
393 | __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ |
394 | __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ | |
395 | __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ | |
396 | __le32 i_crtime; /* File Creation time */ | |
397 | __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ | |
25ec56b5 | 398 | __le32 i_version_hi; /* high 32 bits for 64-bit version */ |
ac27a0ec DK |
399 | }; |
400 | ||
ac27a0ec | 401 | |
ef7f3835 KS |
402 | #define EXT4_EPOCH_BITS 2 |
403 | #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) | |
404 | #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) | |
405 | ||
406 | /* | |
407 | * Extended fields will fit into an inode if the filesystem was formatted | |
408 | * with large inodes (-I 256 or larger) and there are not currently any EAs | |
409 | * consuming all of the available space. For new inodes we always reserve | |
410 | * enough space for the kernel's known extended fields, but for inodes | |
411 | * created with an old kernel this might not have been the case. None of | |
412 | * the extended inode fields is critical for correct filesystem operation. | |
413 | * This macro checks if a certain field fits in the inode. Note that | |
414 | * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize | |
415 | */ | |
416 | #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ | |
417 | ((offsetof(typeof(*ext4_inode), field) + \ | |
418 | sizeof((ext4_inode)->field)) \ | |
419 | <= (EXT4_GOOD_OLD_INODE_SIZE + \ | |
420 | (einode)->i_extra_isize)) \ | |
421 | ||
422 | static inline __le32 ext4_encode_extra_time(struct timespec *time) | |
423 | { | |
424 | return cpu_to_le32((sizeof(time->tv_sec) > 4 ? | |
425 | time->tv_sec >> 32 : 0) | | |
426 | ((time->tv_nsec << 2) & EXT4_NSEC_MASK)); | |
427 | } | |
428 | ||
429 | static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) | |
430 | { | |
431 | if (sizeof(time->tv_sec) > 4) | |
432 | time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) | |
433 | << 32; | |
434 | time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2; | |
435 | } | |
436 | ||
437 | #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ | |
438 | do { \ | |
439 | (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ | |
440 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ | |
441 | (raw_inode)->xtime ## _extra = \ | |
442 | ext4_encode_extra_time(&(inode)->xtime); \ | |
443 | } while (0) | |
444 | ||
445 | #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ | |
446 | do { \ | |
447 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ | |
448 | (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ | |
449 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ | |
450 | (raw_inode)->xtime ## _extra = \ | |
451 | ext4_encode_extra_time(&(einode)->xtime); \ | |
452 | } while (0) | |
453 | ||
454 | #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ | |
455 | do { \ | |
456 | (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ | |
457 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ | |
458 | ext4_decode_extra_time(&(inode)->xtime, \ | |
459 | raw_inode->xtime ## _extra); \ | |
460 | } while (0) | |
461 | ||
462 | #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ | |
463 | do { \ | |
464 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ | |
465 | (einode)->xtime.tv_sec = \ | |
466 | (signed)le32_to_cpu((raw_inode)->xtime); \ | |
467 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ | |
468 | ext4_decode_extra_time(&(einode)->xtime, \ | |
469 | raw_inode->xtime ## _extra); \ | |
470 | } while (0) | |
471 | ||
25ec56b5 JNC |
472 | #define i_disk_version osd1.linux1.l_i_version |
473 | ||
ac27a0ec DK |
474 | #if defined(__KERNEL__) || defined(__linux__) |
475 | #define i_reserved1 osd1.linux1.l_i_reserved1 | |
a1ddeb7e | 476 | #define i_file_acl_high osd2.linux2.l_i_file_acl_high |
0fc1b451 | 477 | #define i_blocks_high osd2.linux2.l_i_blocks_high |
ac27a0ec DK |
478 | #define i_uid_low i_uid |
479 | #define i_gid_low i_gid | |
480 | #define i_uid_high osd2.linux2.l_i_uid_high | |
481 | #define i_gid_high osd2.linux2.l_i_gid_high | |
482 | #define i_reserved2 osd2.linux2.l_i_reserved2 | |
483 | ||
484 | #elif defined(__GNU__) | |
485 | ||
486 | #define i_translator osd1.hurd1.h_i_translator | |
ac27a0ec DK |
487 | #define i_uid_high osd2.hurd2.h_i_uid_high |
488 | #define i_gid_high osd2.hurd2.h_i_gid_high | |
489 | #define i_author osd2.hurd2.h_i_author | |
490 | ||
491 | #elif defined(__masix__) | |
492 | ||
493 | #define i_reserved1 osd1.masix1.m_i_reserved1 | |
a1ddeb7e | 494 | #define i_file_acl_high osd2.masix2.m_i_file_acl_high |
ac27a0ec DK |
495 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
496 | ||
497 | #endif /* defined(__KERNEL__) || defined(__linux__) */ | |
498 | ||
499 | /* | |
500 | * File system states | |
501 | */ | |
617ba13b MC |
502 | #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ |
503 | #define EXT4_ERROR_FS 0x0002 /* Errors detected */ | |
504 | #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ | |
ac27a0ec | 505 | |
469108ff TT |
506 | /* |
507 | * Misc. filesystem flags | |
508 | */ | |
509 | #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ | |
510 | #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ | |
511 | #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ | |
512 | ||
ac27a0ec DK |
513 | /* |
514 | * Mount flags | |
515 | */ | |
617ba13b MC |
516 | #define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */ |
517 | #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ | |
518 | #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ | |
519 | #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ | |
520 | #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ | |
521 | #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ | |
522 | #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ | |
523 | #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ | |
524 | #define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */ | |
525 | #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ | |
526 | #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ | |
527 | #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ | |
528 | #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ | |
529 | #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ | |
530 | #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ | |
531 | #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ | |
532 | #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ | |
533 | #define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */ | |
534 | #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ | |
535 | #define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */ | |
536 | #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ | |
537 | #define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */ | |
538 | #define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */ | |
818d276c GS |
539 | #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ |
540 | #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ | |
25ec56b5 | 541 | #define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ |
64769240 | 542 | #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ |
5bf5683a HK |
543 | #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ |
544 | ||
617ba13b | 545 | /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ |
ac27a0ec | 546 | #ifndef _LINUX_EXT2_FS_H |
617ba13b MC |
547 | #define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt |
548 | #define set_opt(o, opt) o |= EXT4_MOUNT_##opt | |
549 | #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ | |
550 | EXT4_MOUNT_##opt) | |
ac27a0ec | 551 | #else |
617ba13b MC |
552 | #define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD |
553 | #define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT | |
554 | #define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS | |
ac27a0ec DK |
555 | #endif |
556 | ||
617ba13b MC |
557 | #define ext4_set_bit ext2_set_bit |
558 | #define ext4_set_bit_atomic ext2_set_bit_atomic | |
559 | #define ext4_clear_bit ext2_clear_bit | |
560 | #define ext4_clear_bit_atomic ext2_clear_bit_atomic | |
561 | #define ext4_test_bit ext2_test_bit | |
562 | #define ext4_find_first_zero_bit ext2_find_first_zero_bit | |
563 | #define ext4_find_next_zero_bit ext2_find_next_zero_bit | |
aa02ad67 | 564 | #define ext4_find_next_bit ext2_find_next_bit |
ac27a0ec DK |
565 | |
566 | /* | |
567 | * Maximal mount counts between two filesystem checks | |
568 | */ | |
617ba13b MC |
569 | #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
570 | #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ | |
ac27a0ec DK |
571 | |
572 | /* | |
573 | * Behaviour when detecting errors | |
574 | */ | |
617ba13b MC |
575 | #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ |
576 | #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ | |
577 | #define EXT4_ERRORS_PANIC 3 /* Panic */ | |
578 | #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE | |
ac27a0ec DK |
579 | |
580 | /* | |
581 | * Structure of the super block | |
582 | */ | |
617ba13b | 583 | struct ext4_super_block { |
ac27a0ec | 584 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
6bc9feff | 585 | __le32 s_blocks_count_lo; /* Blocks count */ |
308ba3ec AK |
586 | __le32 s_r_blocks_count_lo; /* Reserved blocks count */ |
587 | __le32 s_free_blocks_count_lo; /* Free blocks count */ | |
ac27a0ec DK |
588 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
589 | __le32 s_first_data_block; /* First Data Block */ | |
590 | __le32 s_log_block_size; /* Block size */ | |
f077d0d7 | 591 | __le32 s_obso_log_frag_size; /* Obsoleted fragment size */ |
ac27a0ec | 592 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
f077d0d7 | 593 | __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */ |
ac27a0ec DK |
594 | __le32 s_inodes_per_group; /* # Inodes per group */ |
595 | __le32 s_mtime; /* Mount time */ | |
596 | /*30*/ __le32 s_wtime; /* Write time */ | |
597 | __le16 s_mnt_count; /* Mount count */ | |
598 | __le16 s_max_mnt_count; /* Maximal mount count */ | |
599 | __le16 s_magic; /* Magic signature */ | |
600 | __le16 s_state; /* File system state */ | |
601 | __le16 s_errors; /* Behaviour when detecting errors */ | |
602 | __le16 s_minor_rev_level; /* minor revision level */ | |
603 | /*40*/ __le32 s_lastcheck; /* time of last check */ | |
604 | __le32 s_checkinterval; /* max. time between checks */ | |
605 | __le32 s_creator_os; /* OS */ | |
606 | __le32 s_rev_level; /* Revision level */ | |
607 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ | |
608 | __le16 s_def_resgid; /* Default gid for reserved blocks */ | |
609 | /* | |
617ba13b | 610 | * These fields are for EXT4_DYNAMIC_REV superblocks only. |
ac27a0ec DK |
611 | * |
612 | * Note: the difference between the compatible feature set and | |
613 | * the incompatible feature set is that if there is a bit set | |
614 | * in the incompatible feature set that the kernel doesn't | |
615 | * know about, it should refuse to mount the filesystem. | |
616 | * | |
617 | * e2fsck's requirements are more strict; if it doesn't know | |
618 | * about a feature in either the compatible or incompatible | |
619 | * feature set, it must abort and not try to meddle with | |
620 | * things it doesn't understand... | |
621 | */ | |
622 | __le32 s_first_ino; /* First non-reserved inode */ | |
0d1ee42f | 623 | __le16 s_inode_size; /* size of inode structure */ |
ac27a0ec DK |
624 | __le16 s_block_group_nr; /* block group # of this superblock */ |
625 | __le32 s_feature_compat; /* compatible feature set */ | |
626 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ | |
627 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ | |
628 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ | |
629 | /*78*/ char s_volume_name[16]; /* volume name */ | |
630 | /*88*/ char s_last_mounted[64]; /* directory where last mounted */ | |
631 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ | |
632 | /* | |
633 | * Performance hints. Directory preallocation should only | |
617ba13b | 634 | * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
ac27a0ec DK |
635 | */ |
636 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ | |
637 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ | |
638 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ | |
639 | /* | |
617ba13b | 640 | * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
ac27a0ec DK |
641 | */ |
642 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ | |
643 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ | |
644 | __le32 s_journal_dev; /* device number of journal file */ | |
645 | __le32 s_last_orphan; /* start of list of inodes to delete */ | |
646 | __le32 s_hash_seed[4]; /* HTREE hash seed */ | |
647 | __u8 s_def_hash_version; /* Default hash version to use */ | |
648 | __u8 s_reserved_char_pad; | |
0d1ee42f | 649 | __le16 s_desc_size; /* size of group descriptor */ |
bd81d8ee | 650 | /*100*/ __le32 s_default_mount_opts; |
ac27a0ec | 651 | __le32 s_first_meta_bg; /* First metablock block group */ |
bd81d8ee LV |
652 | __le32 s_mkfs_time; /* When the filesystem was created */ |
653 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ | |
654 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ | |
655 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ | |
656 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ | |
657 | __le32 s_free_blocks_count_hi; /* Free blocks count */ | |
c1bddad9 AK |
658 | __le16 s_min_extra_isize; /* All inodes have at least # bytes */ |
659 | __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ | |
660 | __le32 s_flags; /* Miscellaneous flags */ | |
661 | __le16 s_raid_stride; /* RAID stride */ | |
662 | __le16 s_mmp_interval; /* # seconds to wait in MMP checking */ | |
663 | __le64 s_mmp_block; /* Block for multi-mount protection */ | |
664 | __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ | |
772cb7c8 JS |
665 | __u8 s_log_groups_per_flex; /* FLEX_BG group size */ |
666 | __u8 s_reserved_char_pad2; | |
667 | __le16 s_reserved_pad; | |
668 | __u32 s_reserved[162]; /* Padding to the end of the block */ | |
ac27a0ec DK |
669 | }; |
670 | ||
671 | #ifdef __KERNEL__ | |
af5bc92d | 672 | static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) |
ac27a0ec DK |
673 | { |
674 | return sb->s_fs_info; | |
675 | } | |
617ba13b | 676 | static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
ac27a0ec | 677 | { |
617ba13b | 678 | return container_of(inode, struct ext4_inode_info, vfs_inode); |
ac27a0ec DK |
679 | } |
680 | ||
ef7f3835 KS |
681 | static inline struct timespec ext4_current_time(struct inode *inode) |
682 | { | |
683 | return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ? | |
684 | current_fs_time(inode->i_sb) : CURRENT_TIME_SEC; | |
685 | } | |
686 | ||
687 | ||
617ba13b | 688 | static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) |
ac27a0ec | 689 | { |
617ba13b MC |
690 | return ino == EXT4_ROOT_INO || |
691 | ino == EXT4_JOURNAL_INO || | |
692 | ino == EXT4_RESIZE_INO || | |
693 | (ino >= EXT4_FIRST_INO(sb) && | |
694 | ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); | |
ac27a0ec DK |
695 | } |
696 | #else | |
617ba13b | 697 | /* Assume that user mode programs are passing in an ext4fs superblock, not |
ac27a0ec DK |
698 | * a kernel struct super_block. This will allow us to call the feature-test |
699 | * macros from user land. */ | |
617ba13b | 700 | #define EXT4_SB(sb) (sb) |
ac27a0ec DK |
701 | #endif |
702 | ||
617ba13b | 703 | #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
ac27a0ec DK |
704 | |
705 | /* | |
706 | * Codes for operating systems | |
707 | */ | |
617ba13b MC |
708 | #define EXT4_OS_LINUX 0 |
709 | #define EXT4_OS_HURD 1 | |
710 | #define EXT4_OS_MASIX 2 | |
711 | #define EXT4_OS_FREEBSD 3 | |
712 | #define EXT4_OS_LITES 4 | |
ac27a0ec DK |
713 | |
714 | /* | |
715 | * Revision levels | |
716 | */ | |
617ba13b MC |
717 | #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ |
718 | #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ | |
ac27a0ec | 719 | |
617ba13b MC |
720 | #define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV |
721 | #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV | |
ac27a0ec | 722 | |
617ba13b | 723 | #define EXT4_GOOD_OLD_INODE_SIZE 128 |
ac27a0ec DK |
724 | |
725 | /* | |
726 | * Feature set definitions | |
727 | */ | |
728 | ||
617ba13b | 729 | #define EXT4_HAS_COMPAT_FEATURE(sb,mask) \ |
3a06d778 | 730 | ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0) |
617ba13b | 731 | #define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
3a06d778 | 732 | ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0) |
617ba13b | 733 | #define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \ |
3a06d778 | 734 | ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0) |
617ba13b MC |
735 | #define EXT4_SET_COMPAT_FEATURE(sb,mask) \ |
736 | EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask) | |
737 | #define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \ | |
738 | EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask) | |
739 | #define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \ | |
740 | EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask) | |
741 | #define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \ | |
742 | EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask) | |
743 | #define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ | |
744 | EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask) | |
745 | #define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \ | |
746 | EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask) | |
747 | ||
748 | #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 | |
749 | #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 | |
750 | #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 | |
751 | #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 | |
752 | #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 | |
753 | #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 | |
754 | ||
755 | #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 | |
756 | #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 | |
757 | #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 | |
0fc1b451 | 758 | #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 |
717d50e4 | 759 | #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 |
f8628a14 | 760 | #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 |
ef7f3835 | 761 | #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 |
617ba13b MC |
762 | |
763 | #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 | |
764 | #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 | |
765 | #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ | |
766 | #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ | |
767 | #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 | |
a86c6181 | 768 | #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
bd81d8ee | 769 | #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 |
0fc1b451 | 770 | #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 |
ce421581 | 771 | #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 |
617ba13b MC |
772 | |
773 | #define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR | |
774 | #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ | |
775 | EXT4_FEATURE_INCOMPAT_RECOVER| \ | |
a86c6181 | 776 | EXT4_FEATURE_INCOMPAT_META_BG| \ |
bd81d8ee | 777 | EXT4_FEATURE_INCOMPAT_EXTENTS| \ |
ce421581 JS |
778 | EXT4_FEATURE_INCOMPAT_64BIT| \ |
779 | EXT4_FEATURE_INCOMPAT_FLEX_BG) | |
617ba13b MC |
780 | #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
781 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
717d50e4 | 782 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ |
f8628a14 | 783 | EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ |
ef7f3835 | 784 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ |
0fc1b451 AK |
785 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ |
786 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE) | |
ac27a0ec DK |
787 | |
788 | /* | |
789 | * Default values for user and/or group using reserved blocks | |
790 | */ | |
617ba13b MC |
791 | #define EXT4_DEF_RESUID 0 |
792 | #define EXT4_DEF_RESGID 0 | |
ac27a0ec | 793 | |
240799cd TT |
794 | #define EXT4_DEF_INODE_READAHEAD_BLKS 32 |
795 | ||
ac27a0ec DK |
796 | /* |
797 | * Default mount options | |
798 | */ | |
617ba13b MC |
799 | #define EXT4_DEFM_DEBUG 0x0001 |
800 | #define EXT4_DEFM_BSDGROUPS 0x0002 | |
801 | #define EXT4_DEFM_XATTR_USER 0x0004 | |
802 | #define EXT4_DEFM_ACL 0x0008 | |
803 | #define EXT4_DEFM_UID16 0x0010 | |
804 | #define EXT4_DEFM_JMODE 0x0060 | |
805 | #define EXT4_DEFM_JMODE_DATA 0x0020 | |
806 | #define EXT4_DEFM_JMODE_ORDERED 0x0040 | |
807 | #define EXT4_DEFM_JMODE_WBACK 0x0060 | |
ac27a0ec | 808 | |
30773840 TT |
809 | /* |
810 | * Default journal batch times | |
811 | */ | |
812 | #define EXT4_DEF_MIN_BATCH_TIME 0 | |
813 | #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ | |
814 | ||
ac27a0ec DK |
815 | /* |
816 | * Structure of a directory entry | |
817 | */ | |
617ba13b | 818 | #define EXT4_NAME_LEN 255 |
ac27a0ec | 819 | |
617ba13b | 820 | struct ext4_dir_entry { |
ac27a0ec DK |
821 | __le32 inode; /* Inode number */ |
822 | __le16 rec_len; /* Directory entry length */ | |
823 | __le16 name_len; /* Name length */ | |
617ba13b | 824 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
825 | }; |
826 | ||
827 | /* | |
617ba13b | 828 | * The new version of the directory entry. Since EXT4 structures are |
ac27a0ec DK |
829 | * stored in intel byte order, and the name_len field could never be |
830 | * bigger than 255 chars, it's safe to reclaim the extra byte for the | |
831 | * file_type field. | |
832 | */ | |
617ba13b | 833 | struct ext4_dir_entry_2 { |
ac27a0ec DK |
834 | __le32 inode; /* Inode number */ |
835 | __le16 rec_len; /* Directory entry length */ | |
836 | __u8 name_len; /* Name length */ | |
837 | __u8 file_type; | |
617ba13b | 838 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
839 | }; |
840 | ||
841 | /* | |
617ba13b | 842 | * Ext4 directory file types. Only the low 3 bits are used. The |
ac27a0ec DK |
843 | * other bits are reserved for now. |
844 | */ | |
617ba13b MC |
845 | #define EXT4_FT_UNKNOWN 0 |
846 | #define EXT4_FT_REG_FILE 1 | |
847 | #define EXT4_FT_DIR 2 | |
848 | #define EXT4_FT_CHRDEV 3 | |
849 | #define EXT4_FT_BLKDEV 4 | |
850 | #define EXT4_FT_FIFO 5 | |
851 | #define EXT4_FT_SOCK 6 | |
852 | #define EXT4_FT_SYMLINK 7 | |
ac27a0ec | 853 | |
617ba13b | 854 | #define EXT4_FT_MAX 8 |
ac27a0ec DK |
855 | |
856 | /* | |
617ba13b | 857 | * EXT4_DIR_PAD defines the directory entries boundaries |
ac27a0ec DK |
858 | * |
859 | * NOTE: It must be a multiple of 4 | |
860 | */ | |
617ba13b MC |
861 | #define EXT4_DIR_PAD 4 |
862 | #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) | |
863 | #define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \ | |
864 | ~EXT4_DIR_ROUND) | |
a72d7f83 JK |
865 | #define EXT4_MAX_REC_LEN ((1<<16)-1) |
866 | ||
867 | static inline unsigned ext4_rec_len_from_disk(__le16 dlen) | |
868 | { | |
869 | unsigned len = le16_to_cpu(dlen); | |
870 | ||
7be2baaa | 871 | if (len == EXT4_MAX_REC_LEN || len == 0) |
a72d7f83 JK |
872 | return 1 << 16; |
873 | return len; | |
874 | } | |
875 | ||
876 | static inline __le16 ext4_rec_len_to_disk(unsigned len) | |
877 | { | |
878 | if (len == (1 << 16)) | |
879 | return cpu_to_le16(EXT4_MAX_REC_LEN); | |
880 | else if (len > (1 << 16)) | |
881 | BUG(); | |
882 | return cpu_to_le16(len); | |
883 | } | |
884 | ||
ac27a0ec DK |
885 | /* |
886 | * Hash Tree Directory indexing | |
887 | * (c) Daniel Phillips, 2001 | |
888 | */ | |
889 | ||
4074fe37 ES |
890 | #define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \ |
891 | EXT4_FEATURE_COMPAT_DIR_INDEX) && \ | |
617ba13b MC |
892 | (EXT4_I(dir)->i_flags & EXT4_INDEX_FL)) |
893 | #define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX) | |
894 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) | |
ac27a0ec DK |
895 | |
896 | /* Legal values for the dx_root hash_version field: */ | |
897 | ||
898 | #define DX_HASH_LEGACY 0 | |
899 | #define DX_HASH_HALF_MD4 1 | |
900 | #define DX_HASH_TEA 2 | |
f99b2589 TT |
901 | #define DX_HASH_LEGACY_UNSIGNED 3 |
902 | #define DX_HASH_HALF_MD4_UNSIGNED 4 | |
903 | #define DX_HASH_TEA_UNSIGNED 5 | |
ac27a0ec DK |
904 | |
905 | #ifdef __KERNEL__ | |
906 | ||
907 | /* hash info structure used by the directory hash */ | |
908 | struct dx_hash_info | |
909 | { | |
910 | u32 hash; | |
911 | u32 minor_hash; | |
912 | int hash_version; | |
913 | u32 *seed; | |
914 | }; | |
915 | ||
617ba13b | 916 | #define EXT4_HTREE_EOF 0x7fffffff |
ac27a0ec DK |
917 | |
918 | /* | |
617ba13b | 919 | * Control parameters used by ext4_htree_next_block |
ac27a0ec DK |
920 | */ |
921 | #define HASH_NB_ALWAYS 1 | |
922 | ||
923 | ||
924 | /* | |
925 | * Describe an inode's exact location on disk and in memory | |
926 | */ | |
617ba13b | 927 | struct ext4_iloc |
ac27a0ec DK |
928 | { |
929 | struct buffer_head *bh; | |
930 | unsigned long offset; | |
fd2d4291 | 931 | ext4_group_t block_group; |
ac27a0ec DK |
932 | }; |
933 | ||
617ba13b | 934 | static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
ac27a0ec | 935 | { |
617ba13b | 936 | return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
ac27a0ec DK |
937 | } |
938 | ||
939 | /* | |
940 | * This structure is stuffed into the struct file's private_data field | |
941 | * for directories. It is where we put information so that we can do | |
942 | * readdir operations in hash tree order. | |
943 | */ | |
944 | struct dir_private_info { | |
945 | struct rb_root root; | |
946 | struct rb_node *curr_node; | |
947 | struct fname *extra_fname; | |
948 | loff_t last_pos; | |
949 | __u32 curr_hash; | |
950 | __u32 curr_minor_hash; | |
951 | __u32 next_hash; | |
952 | }; | |
953 | ||
954 | /* calculate the first block number of the group */ | |
617ba13b | 955 | static inline ext4_fsblk_t |
fd2d4291 | 956 | ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) |
ac27a0ec | 957 | { |
617ba13b MC |
958 | return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + |
959 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); | |
ac27a0ec DK |
960 | } |
961 | ||
962 | /* | |
963 | * Special error return code only used by dx_probe() and its callers. | |
964 | */ | |
965 | #define ERR_BAD_DX_DIR -75000 | |
966 | ||
72b64b59 | 967 | void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr, |
a9df9a49 | 968 | ext4_group_t *blockgrpp, ext4_grpblk_t *offsetp); |
3a5b2ecd | 969 | |
9f6200bb TT |
970 | extern struct proc_dir_entry *ext4_proc_root; |
971 | ||
5e8814f2 TT |
972 | #ifdef CONFIG_PROC_FS |
973 | extern const struct file_operations ext4_ui_proc_fops; | |
974 | ||
975 | #define EXT4_PROC_HANDLER(name, var) \ | |
976 | do { \ | |
977 | proc = proc_create_data(name, mode, sbi->s_proc, \ | |
978 | &ext4_ui_proc_fops, &sbi->s_##var); \ | |
979 | if (proc == NULL) { \ | |
980 | printk(KERN_ERR "EXT4-fs: can't create %s\n", name); \ | |
981 | goto err_out; \ | |
982 | } \ | |
983 | } while (0) | |
984 | #else | |
985 | #define EXT4_PROC_HANDLER(name, var) | |
986 | #endif | |
987 | ||
ac27a0ec DK |
988 | /* |
989 | * Function prototypes | |
990 | */ | |
991 | ||
992 | /* | |
993 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
617ba13b | 994 | * ext4 source programs needs to include it so they are duplicated here. |
ac27a0ec | 995 | */ |
8c55e204 DK |
996 | # define NORET_TYPE /**/ |
997 | # define ATTRIB_NORET __attribute__((noreturn)) | |
998 | # define NORET_AND noreturn, | |
ac27a0ec | 999 | |
498e5f24 TT |
1000 | /* bitmap.c */ |
1001 | extern unsigned int ext4_count_free(struct buffer_head *, unsigned); | |
1002 | ||
ac27a0ec | 1003 | /* balloc.c */ |
3a5b2ecd MC |
1004 | extern unsigned int ext4_block_group(struct super_block *sb, |
1005 | ext4_fsblk_t blocknr); | |
1006 | extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, | |
1007 | ext4_fsblk_t blocknr); | |
fd2d4291 AM |
1008 | extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); |
1009 | extern unsigned long ext4_bg_num_gdb(struct super_block *sb, | |
1010 | ext4_group_t group); | |
7061eba7 | 1011 | extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, |
617ba13b | 1012 | ext4_fsblk_t goal, unsigned long *count, int *errp); |
5c791616 | 1013 | extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); |
8c3bf8a0 | 1014 | extern int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks); |
af5bc92d | 1015 | extern void ext4_free_blocks(handle_t *handle, struct inode *inode, |
c9de560d | 1016 | ext4_fsblk_t block, unsigned long count, int metadata); |
e21675d4 AK |
1017 | extern void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, |
1018 | ext4_fsblk_t block, unsigned long count); | |
af5bc92d TT |
1019 | extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *); |
1020 | extern void ext4_check_blocks_bitmap(struct super_block *); | |
617ba13b | 1021 | extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, |
fd2d4291 | 1022 | ext4_group_t block_group, |
ac27a0ec | 1023 | struct buffer_head ** bh); |
617ba13b | 1024 | extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
ac27a0ec DK |
1025 | |
1026 | /* dir.c */ | |
617ba13b MC |
1027 | extern int ext4_check_dir_entry(const char *, struct inode *, |
1028 | struct ext4_dir_entry_2 *, | |
498e5f24 | 1029 | struct buffer_head *, unsigned int); |
617ba13b | 1030 | extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
ac27a0ec | 1031 | __u32 minor_hash, |
617ba13b MC |
1032 | struct ext4_dir_entry_2 *dirent); |
1033 | extern void ext4_htree_free_dir_info(struct dir_private_info *p); | |
ac27a0ec DK |
1034 | |
1035 | /* fsync.c */ | |
af5bc92d | 1036 | extern int ext4_sync_file(struct file *, struct dentry *, int); |
ac27a0ec DK |
1037 | |
1038 | /* hash.c */ | |
617ba13b | 1039 | extern int ext4fs_dirhash(const char *name, int len, struct |
ac27a0ec DK |
1040 | dx_hash_info *hinfo); |
1041 | ||
1042 | /* ialloc.c */ | |
af5bc92d TT |
1043 | extern struct inode * ext4_new_inode(handle_t *, struct inode *, int); |
1044 | extern void ext4_free_inode(handle_t *, struct inode *); | |
1045 | extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); | |
1046 | extern unsigned long ext4_count_free_inodes(struct super_block *); | |
1047 | extern unsigned long ext4_count_dirs(struct super_block *); | |
1048 | extern void ext4_check_inodes_bitmap(struct super_block *); | |
ac27a0ec | 1049 | |
c9de560d AT |
1050 | /* mballoc.c */ |
1051 | extern long ext4_mb_stats; | |
1052 | extern long ext4_mb_max_to_scan; | |
1053 | extern int ext4_mb_init(struct super_block *, int); | |
1054 | extern int ext4_mb_release(struct super_block *); | |
1055 | extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, | |
1056 | struct ext4_allocation_request *, int *); | |
1057 | extern int ext4_mb_reserve_blocks(struct super_block *, int); | |
c2ea3fde | 1058 | extern void ext4_discard_preallocations(struct inode *); |
c9de560d AT |
1059 | extern int __init init_ext4_mballoc(void); |
1060 | extern void exit_ext4_mballoc(void); | |
1061 | extern void ext4_mb_free_blocks(handle_t *, struct inode *, | |
1062 | unsigned long, unsigned long, int, unsigned long *); | |
920313a7 | 1063 | extern int ext4_mb_add_groupinfo(struct super_block *sb, |
5f21b0e6 FB |
1064 | ext4_group_t i, struct ext4_group_desc *desc); |
1065 | extern void ext4_mb_update_group_info(struct ext4_group_info *grp, | |
1066 | ext4_grpblk_t add); | |
920313a7 AK |
1067 | extern int ext4_mb_get_buddy_cache_lock(struct super_block *, ext4_group_t); |
1068 | extern void ext4_mb_put_buddy_cache_lock(struct super_block *, | |
1069 | ext4_group_t, int); | |
ac27a0ec | 1070 | /* inode.c */ |
617ba13b MC |
1071 | int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode, |
1072 | struct buffer_head *bh, ext4_fsblk_t blocknr); | |
725d26d3 AK |
1073 | struct buffer_head *ext4_getblk(handle_t *, struct inode *, |
1074 | ext4_lblk_t, int, int *); | |
1075 | struct buffer_head *ext4_bread(handle_t *, struct inode *, | |
1076 | ext4_lblk_t, int, int *); | |
6873fa0d ES |
1077 | int ext4_get_block(struct inode *inode, sector_t iblock, |
1078 | struct buffer_head *bh_result, int create); | |
ac27a0ec | 1079 | |
1d1fe1ee | 1080 | extern struct inode *ext4_iget(struct super_block *, unsigned long); |
af5bc92d TT |
1081 | extern int ext4_write_inode(struct inode *, int); |
1082 | extern int ext4_setattr(struct dentry *, struct iattr *); | |
3e3398a0 MC |
1083 | extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, |
1084 | struct kstat *stat); | |
af5bc92d TT |
1085 | extern void ext4_delete_inode(struct inode *); |
1086 | extern int ext4_sync_inode(handle_t *, struct inode *); | |
617ba13b MC |
1087 | extern void ext4_dirty_inode(struct inode *); |
1088 | extern int ext4_change_inode_journal_flag(struct inode *, int); | |
1089 | extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); | |
91ef4caf | 1090 | extern int ext4_can_truncate(struct inode *inode); |
af5bc92d | 1091 | extern void ext4_truncate(struct inode *); |
617ba13b | 1092 | extern void ext4_set_inode_flags(struct inode *); |
ff9ddf7e | 1093 | extern void ext4_get_inode_flags(struct ext4_inode_info *); |
617ba13b | 1094 | extern void ext4_set_aops(struct inode *inode); |
a86c6181 | 1095 | extern int ext4_writepage_trans_blocks(struct inode *); |
a02908f1 | 1096 | extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int idxblocks); |
f3bd1f3f | 1097 | extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); |
cf108bca | 1098 | extern int ext4_block_truncate_page(handle_t *handle, |
a86c6181 | 1099 | struct address_space *mapping, loff_t from); |
2e9ee850 | 1100 | extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
ac27a0ec DK |
1101 | |
1102 | /* ioctl.c */ | |
5cdd7b2d | 1103 | extern long ext4_ioctl(struct file *, unsigned int, unsigned long); |
af5bc92d | 1104 | extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); |
ac27a0ec | 1105 | |
c14c6fd5 | 1106 | /* migrate.c */ |
2a43a878 | 1107 | extern int ext4_ext_migrate(struct inode *); |
ac27a0ec | 1108 | /* namei.c */ |
617ba13b MC |
1109 | extern int ext4_orphan_add(handle_t *, struct inode *); |
1110 | extern int ext4_orphan_del(handle_t *, struct inode *); | |
1111 | extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, | |
ac27a0ec DK |
1112 | __u32 start_minor_hash, __u32 *next_hash); |
1113 | ||
1114 | /* resize.c */ | |
617ba13b MC |
1115 | extern int ext4_group_add(struct super_block *sb, |
1116 | struct ext4_new_group_data *input); | |
1117 | extern int ext4_group_extend(struct super_block *sb, | |
1118 | struct ext4_super_block *es, | |
1119 | ext4_fsblk_t n_blocks_count); | |
ac27a0ec DK |
1120 | |
1121 | /* super.c */ | |
af5bc92d | 1122 | extern void ext4_error(struct super_block *, const char *, const char *, ...) |
ac27a0ec | 1123 | __attribute__ ((format (printf, 3, 4))); |
af5bc92d TT |
1124 | extern void __ext4_std_error(struct super_block *, const char *, int); |
1125 | extern void ext4_abort(struct super_block *, const char *, const char *, ...) | |
ac27a0ec | 1126 | __attribute__ ((format (printf, 3, 4))); |
af5bc92d | 1127 | extern void ext4_warning(struct super_block *, const char *, const char *, ...) |
ac27a0ec | 1128 | __attribute__ ((format (printf, 3, 4))); |
5d1b1b3f AK |
1129 | extern void ext4_grp_locked_error(struct super_block *, ext4_group_t, |
1130 | const char *, const char *, ...) | |
1131 | __attribute__ ((format (printf, 4, 5))); | |
af5bc92d | 1132 | extern void ext4_update_dynamic_rev(struct super_block *sb); |
99e6f829 AK |
1133 | extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, |
1134 | __u32 compat); | |
1135 | extern int ext4_update_rocompat_feature(handle_t *handle, | |
1136 | struct super_block *sb, __u32 rocompat); | |
1137 | extern int ext4_update_incompat_feature(handle_t *handle, | |
1138 | struct super_block *sb, __u32 incompat); | |
8fadc143 AR |
1139 | extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
1140 | struct ext4_group_desc *bg); | |
1141 | extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, | |
1142 | struct ext4_group_desc *bg); | |
1143 | extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, | |
1144 | struct ext4_group_desc *bg); | |
560671a0 AK |
1145 | extern __u32 ext4_free_blks_count(struct super_block *sb, |
1146 | struct ext4_group_desc *bg); | |
1147 | extern __u32 ext4_free_inodes_count(struct super_block *sb, | |
1148 | struct ext4_group_desc *bg); | |
1149 | extern __u32 ext4_used_dirs_count(struct super_block *sb, | |
1150 | struct ext4_group_desc *bg); | |
1151 | extern __u32 ext4_itable_unused_count(struct super_block *sb, | |
1152 | struct ext4_group_desc *bg); | |
8fadc143 AR |
1153 | extern void ext4_block_bitmap_set(struct super_block *sb, |
1154 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
1155 | extern void ext4_inode_bitmap_set(struct super_block *sb, | |
1156 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
1157 | extern void ext4_inode_table_set(struct super_block *sb, | |
1158 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
560671a0 AK |
1159 | extern void ext4_free_blks_set(struct super_block *sb, |
1160 | struct ext4_group_desc *bg, __u32 count); | |
1161 | extern void ext4_free_inodes_set(struct super_block *sb, | |
1162 | struct ext4_group_desc *bg, __u32 count); | |
1163 | extern void ext4_used_dirs_set(struct super_block *sb, | |
1164 | struct ext4_group_desc *bg, __u32 count); | |
1165 | extern void ext4_itable_unused_set(struct super_block *sb, | |
1166 | struct ext4_group_desc *bg, __u32 count); | |
bd81d8ee LV |
1167 | |
1168 | static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) | |
1169 | { | |
1170 | return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) | | |
6bc9feff | 1171 | le32_to_cpu(es->s_blocks_count_lo); |
bd81d8ee LV |
1172 | } |
1173 | ||
1174 | static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) | |
1175 | { | |
1176 | return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) | | |
308ba3ec | 1177 | le32_to_cpu(es->s_r_blocks_count_lo); |
bd81d8ee LV |
1178 | } |
1179 | ||
1180 | static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) | |
1181 | { | |
1182 | return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) | | |
308ba3ec | 1183 | le32_to_cpu(es->s_free_blocks_count_lo); |
bd81d8ee LV |
1184 | } |
1185 | ||
1186 | static inline void ext4_blocks_count_set(struct ext4_super_block *es, | |
1187 | ext4_fsblk_t blk) | |
1188 | { | |
6bc9feff | 1189 | es->s_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
1190 | es->s_blocks_count_hi = cpu_to_le32(blk >> 32); |
1191 | } | |
1192 | ||
1193 | static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, | |
1194 | ext4_fsblk_t blk) | |
1195 | { | |
308ba3ec | 1196 | es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
1197 | es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); |
1198 | } | |
1199 | ||
1200 | static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, | |
1201 | ext4_fsblk_t blk) | |
1202 | { | |
308ba3ec | 1203 | es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
1204 | es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); |
1205 | } | |
1206 | ||
a48380f7 AK |
1207 | static inline loff_t ext4_isize(struct ext4_inode *raw_inode) |
1208 | { | |
06a279d6 TT |
1209 | if (S_ISREG(le16_to_cpu(raw_inode->i_mode))) |
1210 | return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | | |
1211 | le32_to_cpu(raw_inode->i_size_lo); | |
1212 | else | |
1213 | return (loff_t) le32_to_cpu(raw_inode->i_size_lo); | |
a48380f7 | 1214 | } |
bd81d8ee | 1215 | |
a48380f7 AK |
1216 | static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) |
1217 | { | |
1218 | raw_inode->i_size_lo = cpu_to_le32(i_size); | |
1219 | raw_inode->i_size_high = cpu_to_le32(i_size >> 32); | |
1220 | } | |
ac27a0ec | 1221 | |
c9de560d AT |
1222 | static inline |
1223 | struct ext4_group_info *ext4_get_group_info(struct super_block *sb, | |
af5bc92d | 1224 | ext4_group_t group) |
c9de560d AT |
1225 | { |
1226 | struct ext4_group_info ***grp_info; | |
1227 | long indexv, indexh; | |
1228 | grp_info = EXT4_SB(sb)->s_group_info; | |
1229 | indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); | |
1230 | indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); | |
1231 | return grp_info[indexv][indexh]; | |
1232 | } | |
1233 | ||
1234 | ||
772cb7c8 JS |
1235 | static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, |
1236 | ext4_group_t block_group) | |
1237 | { | |
1238 | return block_group >> sbi->s_log_groups_per_flex; | |
1239 | } | |
1240 | ||
1241 | static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) | |
1242 | { | |
1243 | return 1 << sbi->s_log_groups_per_flex; | |
1244 | } | |
1245 | ||
617ba13b | 1246 | #define ext4_std_error(sb, errno) \ |
ac27a0ec DK |
1247 | do { \ |
1248 | if ((errno)) \ | |
4db9c54a | 1249 | __ext4_std_error((sb), __func__, (errno)); \ |
ac27a0ec DK |
1250 | } while (0) |
1251 | ||
a30d542a | 1252 | #ifdef CONFIG_SMP |
179f7ebf | 1253 | /* Each CPU can accumulate percpu_counter_batch blocks in their local |
a30d542a | 1254 | * counters. So we need to make sure we have free blocks more |
179f7ebf | 1255 | * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. |
a30d542a | 1256 | */ |
179f7ebf | 1257 | #define EXT4_FREEBLOCKS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) |
a30d542a AK |
1258 | #else |
1259 | #define EXT4_FREEBLOCKS_WATERMARK 0 | |
1260 | #endif | |
1261 | ||
cf17fea6 AK |
1262 | static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) |
1263 | { | |
1264 | /* | |
1265 | * XXX: replace with spinlock if seen contended -bzzz | |
1266 | */ | |
1267 | down_write(&EXT4_I(inode)->i_data_sem); | |
1268 | if (newsize > EXT4_I(inode)->i_disksize) | |
1269 | EXT4_I(inode)->i_disksize = newsize; | |
1270 | up_write(&EXT4_I(inode)->i_data_sem); | |
1271 | return ; | |
1272 | } | |
a30d542a | 1273 | |
5d1b1b3f AK |
1274 | struct ext4_group_info { |
1275 | unsigned long bb_state; | |
1276 | struct rb_root bb_free_root; | |
1277 | unsigned short bb_first_free; | |
1278 | unsigned short bb_free; | |
1279 | unsigned short bb_fragments; | |
1280 | struct list_head bb_prealloc_list; | |
1281 | #ifdef DOUBLE_CHECK | |
1282 | void *bb_bitmap; | |
1283 | #endif | |
1284 | struct rw_semaphore alloc_sem; | |
1285 | unsigned short bb_counters[]; | |
1286 | }; | |
1287 | ||
1288 | #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 | |
1289 | #define EXT4_GROUP_INFO_LOCKED_BIT 1 | |
1290 | ||
1291 | #define EXT4_MB_GRP_NEED_INIT(grp) \ | |
1292 | (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) | |
1293 | ||
1294 | static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) | |
1295 | { | |
1296 | struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); | |
1297 | ||
1298 | bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state)); | |
1299 | } | |
1300 | ||
1301 | static inline void ext4_unlock_group(struct super_block *sb, | |
1302 | ext4_group_t group) | |
1303 | { | |
1304 | struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); | |
1305 | ||
1306 | bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state)); | |
1307 | } | |
1308 | ||
1309 | static inline int ext4_is_group_locked(struct super_block *sb, | |
1310 | ext4_group_t group) | |
1311 | { | |
1312 | struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); | |
1313 | ||
1314 | return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT, | |
1315 | &(grinfo->bb_state)); | |
1316 | } | |
1317 | ||
ac27a0ec DK |
1318 | /* |
1319 | * Inodes and files operations | |
1320 | */ | |
1321 | ||
1322 | /* dir.c */ | |
617ba13b | 1323 | extern const struct file_operations ext4_dir_operations; |
ac27a0ec DK |
1324 | |
1325 | /* file.c */ | |
c5ef1c42 | 1326 | extern const struct inode_operations ext4_file_inode_operations; |
617ba13b | 1327 | extern const struct file_operations ext4_file_operations; |
ac27a0ec DK |
1328 | |
1329 | /* namei.c */ | |
c5ef1c42 AV |
1330 | extern const struct inode_operations ext4_dir_inode_operations; |
1331 | extern const struct inode_operations ext4_special_inode_operations; | |
ac27a0ec DK |
1332 | |
1333 | /* symlink.c */ | |
c5ef1c42 AV |
1334 | extern const struct inode_operations ext4_symlink_inode_operations; |
1335 | extern const struct inode_operations ext4_fast_symlink_inode_operations; | |
ac27a0ec | 1336 | |
a86c6181 AT |
1337 | /* extents.c */ |
1338 | extern int ext4_ext_tree_init(handle_t *handle, struct inode *); | |
1339 | extern int ext4_ext_writepage_trans_blocks(struct inode *, int); | |
a02908f1 MC |
1340 | extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, |
1341 | int chunk); | |
a86c6181 | 1342 | extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, |
498e5f24 TT |
1343 | ext4_lblk_t iblock, unsigned int max_blocks, |
1344 | struct buffer_head *bh_result, | |
1345 | int create, int extend_disksize); | |
cf108bca | 1346 | extern void ext4_ext_truncate(struct inode *); |
a86c6181 AT |
1347 | extern void ext4_ext_init(struct super_block *); |
1348 | extern void ext4_ext_release(struct super_block *); | |
a2df2a63 AA |
1349 | extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, |
1350 | loff_t len); | |
0e855ac8 | 1351 | extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, |
498e5f24 | 1352 | sector_t block, unsigned int max_blocks, |
0e855ac8 | 1353 | struct buffer_head *bh, int create, |
d2a17637 | 1354 | int extend_disksize, int flag); |
3a06d778 AK |
1355 | extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1356 | __u64 start, __u64 len); | |
1357 | ||
2ccb5fb9 AK |
1358 | /* |
1359 | * Add new method to test wether block and inode bitmaps are properly | |
1360 | * initialized. With uninit_bg reading the block from disk is not enough | |
1361 | * to mark the bitmap uptodate. We need to also zero-out the bitmap | |
1362 | */ | |
1363 | #define BH_BITMAP_UPTODATE BH_JBDPrivateStart | |
1364 | ||
1365 | static inline int bitmap_uptodate(struct buffer_head *bh) | |
1366 | { | |
1367 | return (buffer_uptodate(bh) && | |
1368 | test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); | |
1369 | } | |
1370 | static inline void set_bitmap_uptodate(struct buffer_head *bh) | |
1371 | { | |
1372 | set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); | |
1373 | } | |
1374 | ||
ac27a0ec DK |
1375 | #endif /* __KERNEL__ */ |
1376 | ||
3dcf5451 | 1377 | #endif /* _EXT4_H */ |