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f5166768 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
3dcf5451 | 3 | * ext4.h |
ac27a0ec DK |
4 | * |
5 | * Copyright (C) 1992, 1993, 1994, 1995 | |
6 | * Remy Card (card@masi.ibp.fr) | |
7 | * Laboratoire MASI - Institut Blaise Pascal | |
8 | * Universite Pierre et Marie Curie (Paris VI) | |
9 | * | |
10 | * from | |
11 | * | |
12 | * linux/include/linux/minix_fs.h | |
13 | * | |
14 | * Copyright (C) 1991, 1992 Linus Torvalds | |
15 | */ | |
16 | ||
3dcf5451 CH |
17 | #ifndef _EXT4_H |
18 | #define _EXT4_H | |
ac27a0ec | 19 | |
31d21d21 | 20 | #include <linux/refcount.h> |
ac27a0ec | 21 | #include <linux/types.h> |
3a5b2ecd | 22 | #include <linux/blkdev.h> |
ac27a0ec | 23 | #include <linux/magic.h> |
2ccb5fb9 | 24 | #include <linux/jbd2.h> |
60e58e0f | 25 | #include <linux/quota.h> |
d444c3c3 TT |
26 | #include <linux/rwsem.h> |
27 | #include <linux/rbtree.h> | |
28 | #include <linux/seqlock.h> | |
29 | #include <linux/mutex.h> | |
ca0faba0 TT |
30 | #include <linux/timer.h> |
31 | #include <linux/wait.h> | |
174cd4b1 | 32 | #include <linux/sched/signal.h> |
ca0faba0 TT |
33 | #include <linux/blockgroup_lock.h> |
34 | #include <linux/percpu_counter.h> | |
efbed4dc | 35 | #include <linux/ratelimit.h> |
0441984a | 36 | #include <crypto/hash.h> |
a633f5a3 | 37 | #include <linux/falloc.h> |
c8585c6f | 38 | #include <linux/percpu-rwsem.h> |
10c5db28 | 39 | #include <linux/fiemap.h> |
4d92dc0f BH |
40 | #ifdef __KERNEL__ |
41 | #include <linux/compat.h> | |
42 | #endif | |
c9de560d | 43 | |
734f0d24 | 44 | #include <linux/fscrypt.h> |
c93d8f88 | 45 | #include <linux/fsverity.h> |
734f0d24 | 46 | |
072ebb3b TT |
47 | #include <linux/compiler.h> |
48 | ||
ac27a0ec | 49 | /* |
8a35694e | 50 | * The fourth extended filesystem constants/structures |
ac27a0ec DK |
51 | */ |
52 | ||
a2821e34 AZ |
53 | /* |
54 | * with AGGRESSIVE_CHECK allocator runs consistency checks over | |
55 | * structures. these checks slow things down a lot | |
56 | */ | |
57 | #define AGGRESSIVE_CHECK__ | |
58 | ||
59 | /* | |
60 | * with DOUBLE_CHECK defined mballoc creates persistent in-core | |
61 | * bitmaps, maintains and uses them to check for double allocations | |
62 | */ | |
63 | #define DOUBLE_CHECK__ | |
64 | ||
ac27a0ec | 65 | /* |
617ba13b | 66 | * Define EXT4FS_DEBUG to produce debug messages |
ac27a0ec | 67 | */ |
617ba13b | 68 | #undef EXT4FS_DEBUG |
ac27a0ec | 69 | |
ac27a0ec DK |
70 | /* |
71 | * Debug code | |
72 | */ | |
617ba13b MC |
73 | #ifdef EXT4FS_DEBUG |
74 | #define ext4_debug(f, a...) \ | |
ac27a0ec | 75 | do { \ |
af5bc92d | 76 | printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \ |
4db9c54a | 77 | __FILE__, __LINE__, __func__); \ |
af5bc92d | 78 | printk(KERN_DEBUG f, ## a); \ |
ac27a0ec DK |
79 | } while (0) |
80 | #else | |
ace36ad4 | 81 | #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) |
ac27a0ec DK |
82 | #endif |
83 | ||
70aa1554 RH |
84 | /* |
85 | * Turn on EXT_DEBUG to enable ext4_ext_show_path/leaf/move in extents.c | |
86 | */ | |
87 | #define EXT_DEBUG__ | |
88 | ||
4a092d73 | 89 | /* |
70aa1554 | 90 | * Dynamic printk for controlled extents debugging. |
4a092d73 | 91 | */ |
70aa1554 RH |
92 | #ifdef CONFIG_EXT4_DEBUG |
93 | #define ext_debug(ino, fmt, ...) \ | |
94 | pr_debug("[%s/%d] EXT4-fs (%s): ino %lu: (%s, %d): %s:" fmt, \ | |
95 | current->comm, task_pid_nr(current), \ | |
96 | ino->i_sb->s_id, ino->i_ino, __FILE__, __LINE__, \ | |
97 | __func__, ##__VA_ARGS__) | |
4a092d73 | 98 | #else |
70aa1554 | 99 | #define ext_debug(ino, fmt, ...) no_printk(fmt, ##__VA_ARGS__) |
4a092d73 TT |
100 | #endif |
101 | ||
837c23fb CX |
102 | #define ASSERT(assert) \ |
103 | do { \ | |
104 | if (unlikely(!(assert))) { \ | |
105 | printk(KERN_EMERG \ | |
106 | "Assertion failure in %s() at %s:%d: '%s'\n", \ | |
107 | __func__, __FILE__, __LINE__, #assert); \ | |
108 | BUG(); \ | |
109 | } \ | |
110 | } while (0) | |
111 | ||
d444c3c3 TT |
112 | /* data type for block offset of block group */ |
113 | typedef int ext4_grpblk_t; | |
114 | ||
115 | /* data type for filesystem-wide blocks number */ | |
116 | typedef unsigned long long ext4_fsblk_t; | |
117 | ||
118 | /* data type for file logical block number */ | |
119 | typedef __u32 ext4_lblk_t; | |
120 | ||
121 | /* data type for block group number */ | |
122 | typedef unsigned int ext4_group_t; | |
123 | ||
331573fe NJ |
124 | enum SHIFT_DIRECTION { |
125 | SHIFT_LEFT = 0, | |
126 | SHIFT_RIGHT, | |
127 | }; | |
128 | ||
296c355c | 129 | /* |
60e6679e | 130 | * Flags used in mballoc's allocation_context flags field. |
296c355c TT |
131 | * |
132 | * Also used to show what's going on for debugging purposes when the | |
133 | * flag field is exported via the traceport interface | |
134 | */ | |
d444c3c3 | 135 | |
c9de560d | 136 | /* prefer goal again. length */ |
0ef90db9 | 137 | #define EXT4_MB_HINT_MERGE 0x0001 |
c9de560d | 138 | /* blocks already reserved */ |
0ef90db9 | 139 | #define EXT4_MB_HINT_RESERVED 0x0002 |
c9de560d | 140 | /* metadata is being allocated */ |
0ef90db9 | 141 | #define EXT4_MB_HINT_METADATA 0x0004 |
c9de560d | 142 | /* first blocks in the file */ |
0ef90db9 | 143 | #define EXT4_MB_HINT_FIRST 0x0008 |
c9de560d | 144 | /* search for the best chunk */ |
0ef90db9 | 145 | #define EXT4_MB_HINT_BEST 0x0010 |
c9de560d | 146 | /* data is being allocated */ |
0ef90db9 | 147 | #define EXT4_MB_HINT_DATA 0x0020 |
c9de560d | 148 | /* don't preallocate (for tails) */ |
0ef90db9 | 149 | #define EXT4_MB_HINT_NOPREALLOC 0x0040 |
c9de560d | 150 | /* allocate for locality group */ |
0ef90db9 | 151 | #define EXT4_MB_HINT_GROUP_ALLOC 0x0080 |
c9de560d | 152 | /* allocate goal blocks or none */ |
0ef90db9 | 153 | #define EXT4_MB_HINT_GOAL_ONLY 0x0100 |
c9de560d | 154 | /* goal is meaningful */ |
0ef90db9 | 155 | #define EXT4_MB_HINT_TRY_GOAL 0x0200 |
d2a17637 | 156 | /* blocks already pre-reserved by delayed allocation */ |
0ef90db9 | 157 | #define EXT4_MB_DELALLOC_RESERVED 0x0400 |
4ba74d00 TT |
158 | /* We are doing stream allocation */ |
159 | #define EXT4_MB_STREAM_ALLOC 0x0800 | |
55f020db AH |
160 | /* Use reserved root blocks if needed */ |
161 | #define EXT4_MB_USE_ROOT_BLOCKS 0x1000 | |
27dd4385 LC |
162 | /* Use blocks from reserved pool */ |
163 | #define EXT4_MB_USE_RESERVED 0x2000 | |
99377830 RH |
164 | /* Do strict check for free blocks while retrying block allocation */ |
165 | #define EXT4_MB_STRICT_CHECK 0x4000 | |
196e402a HS |
166 | /* Large fragment size list lookup succeeded at least once for cr = 0 */ |
167 | #define EXT4_MB_CR0_OPTIMIZED 0x8000 | |
168 | /* Avg fragment size rb tree lookup succeeded at least once for cr = 1 */ | |
169 | #define EXT4_MB_CR1_OPTIMIZED 0x00010000 | |
c9de560d AT |
170 | struct ext4_allocation_request { |
171 | /* target inode for block we're allocating */ | |
172 | struct inode *inode; | |
726447d8 ES |
173 | /* how many blocks we want to allocate */ |
174 | unsigned int len; | |
c9de560d AT |
175 | /* logical block in target inode */ |
176 | ext4_lblk_t logical; | |
c9de560d AT |
177 | /* the closest logical allocated block to the left */ |
178 | ext4_lblk_t lleft; | |
c9de560d AT |
179 | /* the closest logical allocated block to the right */ |
180 | ext4_lblk_t lright; | |
726447d8 ES |
181 | /* phys. target (a hint) */ |
182 | ext4_fsblk_t goal; | |
183 | /* phys. block for the closest logical allocated block to the left */ | |
184 | ext4_fsblk_t pleft; | |
185 | /* phys. block for the closest logical allocated block to the right */ | |
c9de560d | 186 | ext4_fsblk_t pright; |
c9de560d | 187 | /* flags. see above EXT4_MB_HINT_* */ |
498e5f24 | 188 | unsigned int flags; |
c9de560d AT |
189 | }; |
190 | ||
e35fd660 TT |
191 | /* |
192 | * Logical to physical block mapping, used by ext4_map_blocks() | |
193 | * | |
194 | * This structure is used to pass requests into ext4_map_blocks() as | |
195 | * well as to store the information returned by ext4_map_blocks(). It | |
196 | * takes less room on the stack than a struct buffer_head. | |
197 | */ | |
6db07461 RH |
198 | #define EXT4_MAP_NEW BIT(BH_New) |
199 | #define EXT4_MAP_MAPPED BIT(BH_Mapped) | |
200 | #define EXT4_MAP_UNWRITTEN BIT(BH_Unwritten) | |
201 | #define EXT4_MAP_BOUNDARY BIT(BH_Boundary) | |
e35fd660 | 202 | #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ |
cbd7584e | 203 | EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) |
e35fd660 TT |
204 | |
205 | struct ext4_map_blocks { | |
206 | ext4_fsblk_t m_pblk; | |
207 | ext4_lblk_t m_lblk; | |
208 | unsigned int m_len; | |
209 | unsigned int m_flags; | |
210 | }; | |
211 | ||
7727ae52 | 212 | /* |
213 | * Block validity checking, system zone rbtree. | |
214 | */ | |
215 | struct ext4_system_blocks { | |
216 | struct rb_root root; | |
217 | struct rcu_head rcu; | |
218 | }; | |
219 | ||
bd2d0210 TT |
220 | /* |
221 | * Flags for ext4_io_end->flags | |
222 | */ | |
223 | #define EXT4_IO_END_UNWRITTEN 0x0001 | |
bd2d0210 | 224 | |
c8cc8816 RH |
225 | struct ext4_io_end_vec { |
226 | struct list_head list; /* list of io_end_vec */ | |
227 | loff_t offset; /* offset in the file */ | |
228 | ssize_t size; /* size of the extent */ | |
229 | }; | |
230 | ||
4188188b | 231 | /* |
556615dc | 232 | * For converting unwritten extents on a work queue. 'handle' is used for |
6b523df4 | 233 | * buffered writeback. |
4188188b | 234 | */ |
0031462b | 235 | typedef struct ext4_io_end { |
5b3ff237 | 236 | struct list_head list; /* per-file finished IO list */ |
6b523df4 JK |
237 | handle_t *handle; /* handle reserved for extent |
238 | * conversion */ | |
0031462b | 239 | struct inode *inode; /* file being written to */ |
b0857d30 JK |
240 | struct bio *bio; /* Linked list of completed |
241 | * bios covering the extent */ | |
8d5d02e6 | 242 | unsigned int flag; /* unwritten or not */ |
31d21d21 | 243 | refcount_t count; /* reference counter */ |
c8cc8816 | 244 | struct list_head list_vec; /* list of ext4_io_end_vec */ |
0031462b MC |
245 | } ext4_io_end_t; |
246 | ||
bd2d0210 | 247 | struct ext4_io_submit { |
5a33911f | 248 | struct writeback_control *io_wbc; |
bd2d0210 TT |
249 | struct bio *io_bio; |
250 | ext4_io_end_t *io_end; | |
bd2d0210 TT |
251 | sector_t io_next_block; |
252 | }; | |
253 | ||
ac27a0ec DK |
254 | /* |
255 | * Special inodes numbers | |
256 | */ | |
617ba13b MC |
257 | #define EXT4_BAD_INO 1 /* Bad blocks inode */ |
258 | #define EXT4_ROOT_INO 2 /* Root inode */ | |
ae812306 AK |
259 | #define EXT4_USR_QUOTA_INO 3 /* User quota inode */ |
260 | #define EXT4_GRP_QUOTA_INO 4 /* Group quota inode */ | |
617ba13b MC |
261 | #define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */ |
262 | #define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */ | |
263 | #define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */ | |
264 | #define EXT4_JOURNAL_INO 8 /* Journal inode */ | |
ac27a0ec | 265 | |
617ba13b MC |
266 | /* First non-reserved inode for old ext4 filesystems */ |
267 | #define EXT4_GOOD_OLD_FIRST_INO 11 | |
ac27a0ec DK |
268 | |
269 | /* | |
270 | * Maximal count of links to a file | |
271 | */ | |
f8628a14 | 272 | #define EXT4_LINK_MAX 65000 |
ac27a0ec DK |
273 | |
274 | /* | |
275 | * Macro-instructions used to manage several block sizes | |
276 | */ | |
617ba13b | 277 | #define EXT4_MIN_BLOCK_SIZE 1024 |
afc7cbca TS |
278 | #define EXT4_MAX_BLOCK_SIZE 65536 |
279 | #define EXT4_MIN_BLOCK_LOG_SIZE 10 | |
fb1813f4 | 280 | #define EXT4_MAX_BLOCK_LOG_SIZE 16 |
9e47a4c9 | 281 | #define EXT4_MAX_CLUSTER_LOG_SIZE 30 |
ac27a0ec | 282 | #ifdef __KERNEL__ |
617ba13b | 283 | # define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize) |
ac27a0ec | 284 | #else |
617ba13b | 285 | # define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
ac27a0ec | 286 | #endif |
af5bc92d | 287 | #define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32)) |
281b5995 TT |
288 | #define EXT4_CLUSTER_SIZE(s) (EXT4_BLOCK_SIZE(s) << \ |
289 | EXT4_SB(s)->s_cluster_bits) | |
ac27a0ec | 290 | #ifdef __KERNEL__ |
617ba13b | 291 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits) |
281b5995 | 292 | # define EXT4_CLUSTER_BITS(s) (EXT4_SB(s)->s_cluster_bits) |
ac27a0ec | 293 | #else |
617ba13b | 294 | # define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
ac27a0ec DK |
295 | #endif |
296 | #ifdef __KERNEL__ | |
617ba13b MC |
297 | #define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits) |
298 | #define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size) | |
299 | #define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino) | |
ac27a0ec | 300 | #else |
617ba13b MC |
301 | #define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
302 | EXT4_GOOD_OLD_INODE_SIZE : \ | |
ac27a0ec | 303 | (s)->s_inode_size) |
617ba13b MC |
304 | #define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \ |
305 | EXT4_GOOD_OLD_FIRST_INO : \ | |
ac27a0ec DK |
306 | (s)->s_first_ino) |
307 | #endif | |
a2df2a63 | 308 | #define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits))) |
518eaa63 FF |
309 | #define EXT4_MAX_BLOCKS(size, offset, blkbits) \ |
310 | ((EXT4_BLOCK_ALIGN(size + offset, blkbits) >> blkbits) - (offset >> \ | |
311 | blkbits)) | |
ac27a0ec | 312 | |
d5b8f310 TT |
313 | /* Translate a block number to a cluster number */ |
314 | #define EXT4_B2C(sbi, blk) ((blk) >> (sbi)->s_cluster_bits) | |
315 | /* Translate a cluster number to a block number */ | |
316 | #define EXT4_C2B(sbi, cluster) ((cluster) << (sbi)->s_cluster_bits) | |
317 | /* Translate # of blks to # of clusters */ | |
318 | #define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \ | |
319 | (sbi)->s_cluster_bits) | |
f5a44db5 TT |
320 | /* Mask out the low bits to get the starting block of the cluster */ |
321 | #define EXT4_PBLK_CMASK(s, pblk) ((pblk) & \ | |
322 | ~((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) | |
323 | #define EXT4_LBLK_CMASK(s, lblk) ((lblk) & \ | |
324 | ~((ext4_lblk_t) (s)->s_cluster_ratio - 1)) | |
8fcc3a58 EW |
325 | /* Fill in the low bits to get the last block of the cluster */ |
326 | #define EXT4_LBLK_CFILL(sbi, lblk) ((lblk) | \ | |
327 | ((ext4_lblk_t) (sbi)->s_cluster_ratio - 1)) | |
f5a44db5 TT |
328 | /* Get the cluster offset */ |
329 | #define EXT4_PBLK_COFF(s, pblk) ((pblk) & \ | |
330 | ((ext4_fsblk_t) (s)->s_cluster_ratio - 1)) | |
331 | #define EXT4_LBLK_COFF(s, lblk) ((lblk) & \ | |
332 | ((ext4_lblk_t) (s)->s_cluster_ratio - 1)) | |
d5b8f310 | 333 | |
ac27a0ec DK |
334 | /* |
335 | * Structure of a blocks group descriptor | |
336 | */ | |
617ba13b | 337 | struct ext4_group_desc |
ac27a0ec | 338 | { |
3a14589c | 339 | __le32 bg_block_bitmap_lo; /* Blocks bitmap block */ |
5272f837 AK |
340 | __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */ |
341 | __le32 bg_inode_table_lo; /* Inodes table block */ | |
560671a0 AK |
342 | __le16 bg_free_blocks_count_lo;/* Free blocks count */ |
343 | __le16 bg_free_inodes_count_lo;/* Free inodes count */ | |
344 | __le16 bg_used_dirs_count_lo; /* Directories count */ | |
717d50e4 | 345 | __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */ |
e6153918 DW |
346 | __le32 bg_exclude_bitmap_lo; /* Exclude bitmap for snapshots */ |
347 | __le16 bg_block_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+bbitmap) LE */ | |
348 | __le16 bg_inode_bitmap_csum_lo;/* crc32c(s_uuid+grp_num+ibitmap) LE */ | |
560671a0 | 349 | __le16 bg_itable_unused_lo; /* Unused inodes count */ |
717d50e4 | 350 | __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */ |
8fadc143 AR |
351 | __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */ |
352 | __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */ | |
353 | __le32 bg_inode_table_hi; /* Inodes table block MSB */ | |
91b51a01 CL |
354 | __le16 bg_free_blocks_count_hi;/* Free blocks count MSB */ |
355 | __le16 bg_free_inodes_count_hi;/* Free inodes count MSB */ | |
356 | __le16 bg_used_dirs_count_hi; /* Directories count MSB */ | |
560671a0 | 357 | __le16 bg_itable_unused_hi; /* Unused inodes count MSB */ |
e6153918 DW |
358 | __le32 bg_exclude_bitmap_hi; /* Exclude bitmap block MSB */ |
359 | __le16 bg_block_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+bbitmap) BE */ | |
360 | __le16 bg_inode_bitmap_csum_hi;/* crc32c(s_uuid+grp_num+ibitmap) BE */ | |
361 | __u32 bg_reserved; | |
ac27a0ec DK |
362 | }; |
363 | ||
41a246d1 DW |
364 | #define EXT4_BG_INODE_BITMAP_CSUM_HI_END \ |
365 | (offsetof(struct ext4_group_desc, bg_inode_bitmap_csum_hi) + \ | |
366 | sizeof(__le16)) | |
367 | #define EXT4_BG_BLOCK_BITMAP_CSUM_HI_END \ | |
368 | (offsetof(struct ext4_group_desc, bg_block_bitmap_csum_hi) + \ | |
369 | sizeof(__le16)) | |
370 | ||
772cb7c8 JS |
371 | /* |
372 | * Structure of a flex block group info | |
373 | */ | |
374 | ||
375 | struct flex_groups { | |
90ba983f TT |
376 | atomic64_t free_clusters; |
377 | atomic_t free_inodes; | |
378 | atomic_t used_dirs; | |
772cb7c8 JS |
379 | }; |
380 | ||
717d50e4 AD |
381 | #define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */ |
382 | #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ | |
383 | #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ | |
384 | ||
ac27a0ec DK |
385 | /* |
386 | * Macro-instructions used to manage group descriptors | |
387 | */ | |
0d1ee42f | 388 | #define EXT4_MIN_DESC_SIZE 32 |
8fadc143 | 389 | #define EXT4_MIN_DESC_SIZE_64BIT 64 |
0d1ee42f AR |
390 | #define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE |
391 | #define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size) | |
ac27a0ec | 392 | #ifdef __KERNEL__ |
617ba13b | 393 | # define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group) |
281b5995 | 394 | # define EXT4_CLUSTERS_PER_GROUP(s) (EXT4_SB(s)->s_clusters_per_group) |
617ba13b MC |
395 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block) |
396 | # define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group) | |
397 | # define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits) | |
ac27a0ec | 398 | #else |
617ba13b | 399 | # define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group) |
0d1ee42f | 400 | # define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s)) |
617ba13b | 401 | # define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group) |
ac27a0ec DK |
402 | #endif |
403 | ||
404 | /* | |
405 | * Constants relative to the data blocks | |
406 | */ | |
617ba13b MC |
407 | #define EXT4_NDIR_BLOCKS 12 |
408 | #define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS | |
409 | #define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1) | |
410 | #define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1) | |
411 | #define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1) | |
ac27a0ec DK |
412 | |
413 | /* | |
414 | * Inode flags | |
415 | */ | |
617ba13b MC |
416 | #define EXT4_SECRM_FL 0x00000001 /* Secure deletion */ |
417 | #define EXT4_UNRM_FL 0x00000002 /* Undelete */ | |
418 | #define EXT4_COMPR_FL 0x00000004 /* Compress file */ | |
419 | #define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */ | |
420 | #define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
421 | #define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */ | |
422 | #define EXT4_NODUMP_FL 0x00000040 /* do not dump file */ | |
423 | #define EXT4_NOATIME_FL 0x00000080 /* do not update atime */ | |
ac27a0ec | 424 | /* Reserved for compression usage... */ |
617ba13b MC |
425 | #define EXT4_DIRTY_FL 0x00000100 |
426 | #define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
427 | #define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */ | |
3edc18d8 TT |
428 | /* nb: was previously EXT2_ECOMPR_FL */ |
429 | #define EXT4_ENCRYPT_FL 0x00000800 /* encrypted file */ | |
ac27a0ec | 430 | /* End compression flags --- maybe not all used */ |
617ba13b MC |
431 | #define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */ |
432 | #define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */ | |
433 | #define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ | |
434 | #define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
435 | #define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
436 | #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
8180a562 | 437 | #define EXT4_HUGE_FILE_FL 0x00040000 /* Set to each huge file */ |
a86c6181 | 438 | #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
c93d8f88 | 439 | #define EXT4_VERITY_FL 0x00100000 /* Verity protected inode */ |
f710b4b9 | 440 | #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ |
4337ecd1 | 441 | /* 0x00400000 was formerly EXT4_EOFBLOCKS_FL */ |
b383a73f IW |
442 | |
443 | #define EXT4_DAX_FL 0x02000000 /* Inode is DAX */ | |
444 | ||
67cf5b09 | 445 | #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ |
8b4953e1 | 446 | #define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ |
de8ff14c | 447 | #define EXT4_CASEFOLD_FL 0x40000000 /* Casefolded directory */ |
8180a562 | 448 | #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ |
ac27a0ec | 449 | |
2a12e147 EB |
450 | /* User modifiable flags */ |
451 | #define EXT4_FL_USER_MODIFIABLE (EXT4_SECRM_FL | \ | |
452 | EXT4_UNRM_FL | \ | |
453 | EXT4_COMPR_FL | \ | |
454 | EXT4_SYNC_FL | \ | |
455 | EXT4_IMMUTABLE_FL | \ | |
456 | EXT4_APPEND_FL | \ | |
457 | EXT4_NODUMP_FL | \ | |
458 | EXT4_NOATIME_FL | \ | |
459 | EXT4_JOURNAL_DATA_FL | \ | |
460 | EXT4_NOTAIL_FL | \ | |
461 | EXT4_DIRSYNC_FL | \ | |
462 | EXT4_TOPDIR_FL | \ | |
463 | EXT4_EXTENTS_FL | \ | |
464 | 0x00400000 /* EXT4_EOFBLOCKS_FL */ | \ | |
465 | EXT4_DAX_FL | \ | |
466 | EXT4_PROJINHERIT_FL | \ | |
467 | EXT4_CASEFOLD_FL) | |
468 | ||
469 | /* User visible flags */ | |
470 | #define EXT4_FL_USER_VISIBLE (EXT4_FL_USER_MODIFIABLE | \ | |
471 | EXT4_DIRTY_FL | \ | |
472 | EXT4_COMPRBLK_FL | \ | |
473 | EXT4_NOCOMPR_FL | \ | |
474 | EXT4_ENCRYPT_FL | \ | |
475 | EXT4_INDEX_FL | \ | |
476 | EXT4_VERITY_FL | \ | |
477 | EXT4_INLINE_DATA_FL) | |
ac27a0ec | 478 | |
8fa43a81 DG |
479 | /* Flags that should be inherited by new inodes from their parent. */ |
480 | #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\ | |
1cd9f097 | 481 | EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\ |
8fa43a81 | 482 | EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\ |
040cb378 | 483 | EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\ |
b383a73f IW |
484 | EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL |\ |
485 | EXT4_DAX_FL) | |
8fa43a81 | 486 | |
2dc6b0d4 | 487 | /* Flags that are appropriate for regular files (all but dir-specific ones). */ |
7ddf79a1 WS |
488 | #define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\ |
489 | EXT4_PROJINHERIT_FL)) | |
2dc6b0d4 DG |
490 | |
491 | /* Flags that are appropriate for non-directories/regular files. */ | |
492 | #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL) | |
493 | ||
abdc644e | 494 | /* The only flags that should be swapped */ |
495 | #define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL) | |
496 | ||
b383a73f IW |
497 | /* Flags which are mutually exclusive to DAX */ |
498 | #define EXT4_DAX_MUT_EXCL (EXT4_VERITY_FL | EXT4_ENCRYPT_FL |\ | |
aa2f7792 | 499 | EXT4_JOURNAL_DATA_FL | EXT4_INLINE_DATA_FL) |
b383a73f | 500 | |
2dc6b0d4 DG |
501 | /* Mask out flags that are inappropriate for the given type of inode. */ |
502 | static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags) | |
503 | { | |
504 | if (S_ISDIR(mode)) | |
505 | return flags; | |
506 | else if (S_ISREG(mode)) | |
507 | return flags & EXT4_REG_FLMASK; | |
508 | else | |
509 | return flags & EXT4_OTHER_FLMASK; | |
510 | } | |
511 | ||
12e9b892 DM |
512 | /* |
513 | * Inode flags used for atomic set/get | |
514 | */ | |
515 | enum { | |
516 | EXT4_INODE_SECRM = 0, /* Secure deletion */ | |
517 | EXT4_INODE_UNRM = 1, /* Undelete */ | |
518 | EXT4_INODE_COMPR = 2, /* Compress file */ | |
519 | EXT4_INODE_SYNC = 3, /* Synchronous updates */ | |
520 | EXT4_INODE_IMMUTABLE = 4, /* Immutable file */ | |
521 | EXT4_INODE_APPEND = 5, /* writes to file may only append */ | |
522 | EXT4_INODE_NODUMP = 6, /* do not dump file */ | |
523 | EXT4_INODE_NOATIME = 7, /* do not update atime */ | |
524 | /* Reserved for compression usage... */ | |
525 | EXT4_INODE_DIRTY = 8, | |
526 | EXT4_INODE_COMPRBLK = 9, /* One or more compressed clusters */ | |
527 | EXT4_INODE_NOCOMPR = 10, /* Don't compress */ | |
f542fbe8 | 528 | EXT4_INODE_ENCRYPT = 11, /* Encrypted file */ |
12e9b892 DM |
529 | /* End compression flags --- maybe not all used */ |
530 | EXT4_INODE_INDEX = 12, /* hash-indexed directory */ | |
531 | EXT4_INODE_IMAGIC = 13, /* AFS directory */ | |
532 | EXT4_INODE_JOURNAL_DATA = 14, /* file data should be journaled */ | |
533 | EXT4_INODE_NOTAIL = 15, /* file tail should not be merged */ | |
534 | EXT4_INODE_DIRSYNC = 16, /* dirsync behaviour (directories only) */ | |
535 | EXT4_INODE_TOPDIR = 17, /* Top of directory hierarchies*/ | |
536 | EXT4_INODE_HUGE_FILE = 18, /* Set to each huge file */ | |
537 | EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ | |
c93d8f88 | 538 | EXT4_INODE_VERITY = 20, /* Verity protected inode */ |
12e9b892 | 539 | EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ |
4337ecd1 | 540 | /* 22 was formerly EXT4_INODE_EOFBLOCKS */ |
b383a73f | 541 | EXT4_INODE_DAX = 25, /* Inode is DAX */ |
67cf5b09 | 542 | EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ |
8b4953e1 | 543 | EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ |
de8ff14c | 544 | EXT4_INODE_CASEFOLD = 30, /* Casefolded directory */ |
12e9b892 DM |
545 | EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ |
546 | }; | |
547 | ||
12e9b892 | 548 | /* |
9a4c8019 CM |
549 | * Since it's pretty easy to mix up bit numbers and hex values, we use a |
550 | * build-time check to make sure that EXT4_XXX_FL is consistent with respect to | |
551 | * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost | |
552 | * any extra space in the compiled kernel image, otherwise, the build will fail. | |
553 | * It's important that these values are the same, since we are using | |
554 | * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent | |
555 | * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk | |
556 | * values found in ext2, ext3 and ext4 filesystems, and of course the values | |
557 | * defined in e2fsprogs. | |
12e9b892 DM |
558 | * |
559 | * It's not paranoia if the Murphy's Law really *is* out to get you. :-) | |
560 | */ | |
9a4c8019 CM |
561 | #define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) |
562 | #define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) | |
563 | ||
12e9b892 DM |
564 | static inline void ext4_check_flag_values(void) |
565 | { | |
566 | CHECK_FLAG_VALUE(SECRM); | |
567 | CHECK_FLAG_VALUE(UNRM); | |
568 | CHECK_FLAG_VALUE(COMPR); | |
569 | CHECK_FLAG_VALUE(SYNC); | |
570 | CHECK_FLAG_VALUE(IMMUTABLE); | |
571 | CHECK_FLAG_VALUE(APPEND); | |
572 | CHECK_FLAG_VALUE(NODUMP); | |
573 | CHECK_FLAG_VALUE(NOATIME); | |
574 | CHECK_FLAG_VALUE(DIRTY); | |
575 | CHECK_FLAG_VALUE(COMPRBLK); | |
576 | CHECK_FLAG_VALUE(NOCOMPR); | |
3edc18d8 | 577 | CHECK_FLAG_VALUE(ENCRYPT); |
12e9b892 DM |
578 | CHECK_FLAG_VALUE(INDEX); |
579 | CHECK_FLAG_VALUE(IMAGIC); | |
580 | CHECK_FLAG_VALUE(JOURNAL_DATA); | |
581 | CHECK_FLAG_VALUE(NOTAIL); | |
582 | CHECK_FLAG_VALUE(DIRSYNC); | |
583 | CHECK_FLAG_VALUE(TOPDIR); | |
584 | CHECK_FLAG_VALUE(HUGE_FILE); | |
585 | CHECK_FLAG_VALUE(EXTENTS); | |
c93d8f88 | 586 | CHECK_FLAG_VALUE(VERITY); |
12e9b892 | 587 | CHECK_FLAG_VALUE(EA_INODE); |
67cf5b09 | 588 | CHECK_FLAG_VALUE(INLINE_DATA); |
8b4953e1 | 589 | CHECK_FLAG_VALUE(PROJINHERIT); |
de8ff14c | 590 | CHECK_FLAG_VALUE(CASEFOLD); |
12e9b892 DM |
591 | CHECK_FLAG_VALUE(RESERVED); |
592 | } | |
593 | ||
ac27a0ec | 594 | /* Used to pass group descriptor data when online resize is done */ |
617ba13b | 595 | struct ext4_new_group_input { |
8c55e204 DK |
596 | __u32 group; /* Group number for this data */ |
597 | __u64 block_bitmap; /* Absolute block number of block bitmap */ | |
598 | __u64 inode_bitmap; /* Absolute block number of inode bitmap */ | |
599 | __u64 inode_table; /* Absolute block number of inode table start */ | |
600 | __u32 blocks_count; /* Total number of blocks in this group */ | |
601 | __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
ac27a0ec DK |
602 | __u16 unused; |
603 | }; | |
604 | ||
4d92dc0f BH |
605 | #if defined(__KERNEL__) && defined(CONFIG_COMPAT) |
606 | struct compat_ext4_new_group_input { | |
607 | u32 group; | |
608 | compat_u64 block_bitmap; | |
609 | compat_u64 inode_bitmap; | |
610 | compat_u64 inode_table; | |
611 | u32 blocks_count; | |
612 | u16 reserved_blocks; | |
613 | u16 unused; | |
614 | }; | |
615 | #endif | |
616 | ||
617ba13b MC |
617 | /* The struct ext4_new_group_input in kernel space, with free_blocks_count */ |
618 | struct ext4_new_group_data { | |
ac27a0ec | 619 | __u32 group; |
bd81d8ee LV |
620 | __u64 block_bitmap; |
621 | __u64 inode_bitmap; | |
622 | __u64 inode_table; | |
ac27a0ec DK |
623 | __u32 blocks_count; |
624 | __u16 reserved_blocks; | |
d77147ff | 625 | __u16 mdata_blocks; |
626 | __u32 free_clusters_count; | |
ac27a0ec DK |
627 | }; |
628 | ||
33afdcc5 YY |
629 | /* Indexes used to index group tables in ext4_new_group_data */ |
630 | enum { | |
631 | BLOCK_BITMAP = 0, /* block bitmap */ | |
632 | INODE_BITMAP, /* inode bitmap */ | |
633 | INODE_TABLE, /* inode tables */ | |
634 | GROUP_TABLE_COUNT, | |
635 | }; | |
636 | ||
a2df2a63 | 637 | /* |
79e83036 | 638 | * Flags used by ext4_map_blocks() |
a2df2a63 | 639 | */ |
556615dc | 640 | /* Allocate any needed blocks and/or convert an unwritten |
c2177057 | 641 | extent to be an initialized ext4 */ |
2ac3b6e0 | 642 | #define EXT4_GET_BLOCKS_CREATE 0x0001 |
556615dc LC |
643 | /* Request the creation of an unwritten extent */ |
644 | #define EXT4_GET_BLOCKS_UNWRIT_EXT 0x0002 | |
645 | #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT (EXT4_GET_BLOCKS_UNWRIT_EXT|\ | |
c2177057 | 646 | EXT4_GET_BLOCKS_CREATE) |
27dd4385 LC |
647 | /* Caller is from the delayed allocation writeout path |
648 | * finally doing the actual allocation of delayed blocks */ | |
03f5d8bc | 649 | #define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 |
0031462b | 650 | /* caller is from the direct IO path, request to creation of an |
556615dc | 651 | unwritten extents if not allocated, split the unwritten |
0031462b | 652 | extent if blocks has been preallocated already*/ |
c7064ef1 | 653 | #define EXT4_GET_BLOCKS_PRE_IO 0x0008 |
1296cc85 | 654 | #define EXT4_GET_BLOCKS_CONVERT 0x0010 |
c7064ef1 | 655 | #define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\ |
556615dc | 656 | EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) |
c7064ef1 JZ |
657 | /* Convert extent to initialized after IO complete */ |
658 | #define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\ | |
556615dc | 659 | EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT) |
27dd4385 LC |
660 | /* Eventual metadata allocation (due to growing extent tree) |
661 | * should not fail, so try to use reserved blocks for that.*/ | |
662 | #define EXT4_GET_BLOCKS_METADATA_NOFAIL 0x0020 | |
556b27ab VH |
663 | /* Don't normalize allocation size (used for fallocate) */ |
664 | #define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040 | |
b8a86845 | 665 | /* Convert written extents to unwritten */ |
2dcba478 | 666 | #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0100 |
c86d8db3 JK |
667 | /* Write zeros to newly created written extents */ |
668 | #define EXT4_GET_BLOCKS_ZERO 0x0200 | |
669 | #define EXT4_GET_BLOCKS_CREATE_ZERO (EXT4_GET_BLOCKS_CREATE |\ | |
670 | EXT4_GET_BLOCKS_ZERO) | |
ee0876bc JK |
671 | /* Caller will submit data before dropping transaction handle. This |
672 | * allows jbd2 to avoid submitting data before commit. */ | |
673 | #define EXT4_GET_BLOCKS_IO_SUBMIT 0x0400 | |
9558cf14 ZY |
674 | /* Caller is in the atomic contex, find extent if it has been cached */ |
675 | #define EXT4_GET_BLOCKS_CACHED_NOWAIT 0x0800 | |
ac27a0ec | 676 | |
107a7bd3 | 677 | /* |
7869a4a6 | 678 | * The bit position of these flags must not overlap with any of the |
ed8a1a76 | 679 | * EXT4_GET_BLOCKS_*. They are used by ext4_find_extent(), |
107a7bd3 | 680 | * read_extent_tree_block(), ext4_split_extent_at(), |
7869a4a6 TT |
681 | * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf(). |
682 | * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be | |
683 | * caching the extents when reading from the extent tree while a | |
684 | * truncate or punch hole operation is in progress. | |
107a7bd3 | 685 | */ |
d26e2c4d TT |
686 | #define EXT4_EX_NOCACHE 0x40000000 |
687 | #define EXT4_EX_FORCE_CACHE 0x20000000 | |
73c384c0 | 688 | #define EXT4_EX_NOFAIL 0x10000000 |
107a7bd3 | 689 | |
e6362609 TT |
690 | /* |
691 | * Flags used by ext4_free_blocks | |
692 | */ | |
e7093f0d PK |
693 | #define EXT4_FREE_BLOCKS_METADATA 0x0001 |
694 | #define EXT4_FREE_BLOCKS_FORGET 0x0002 | |
695 | #define EXT4_FREE_BLOCKS_VALIDATED 0x0004 | |
696 | #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008 | |
84130193 TT |
697 | #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER 0x0010 |
698 | #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER 0x0020 | |
9fe67149 | 699 | #define EXT4_FREE_BLOCKS_RERESERVE_CLUSTER 0x0040 |
e6362609 | 700 | |
ac27a0ec DK |
701 | /* |
702 | * ioctl commands | |
703 | */ | |
617ba13b MC |
704 | #define EXT4_IOC_GETVERSION _IOR('f', 3, long) |
705 | #define EXT4_IOC_SETVERSION _IOW('f', 4, long) | |
617ba13b MC |
706 | #define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION |
707 | #define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION | |
617ba13b MC |
708 | #define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) |
709 | #define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) | |
8eea80d5 TT |
710 | #define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) |
711 | #define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) | |
712 | #define EXT4_IOC_MIGRATE _IO('f', 9) | |
ccd2506b | 713 | /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ |
8eea80d5 | 714 | /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ |
ccd2506b | 715 | #define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) |
748de673 | 716 | #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) |
19c5246d | 717 | #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) |
393d1d1d | 718 | #define EXT4_IOC_SWAP_BOOT _IO('f', 17) |
7869a4a6 | 719 | #define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) |
b0c013e2 TT |
720 | /* ioctl codes 19--39 are reserved for fscrypt */ |
721 | #define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40) | |
1ad3ea6e | 722 | #define EXT4_IOC_GETSTATE _IOW('f', 41, __u32) |
bb5835ed | 723 | #define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap) |
351a0a3f | 724 | #define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32) |
d95efb14 JB |
725 | #define EXT4_IOC_GETFSUUID _IOR('f', 44, struct fsuuid) |
726 | #define EXT4_IOC_SETFSUUID _IOW('f', 44, struct fsuuid) | |
ac27a0ec | 727 | |
e9be2ac7 | 728 | #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32) |
783d9485 TT |
729 | |
730 | /* | |
731 | * Flags for going down operation | |
732 | */ | |
733 | #define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ | |
734 | #define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ | |
735 | #define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ | |
736 | ||
1ad3ea6e TT |
737 | /* |
738 | * Flags returned by EXT4_IOC_GETSTATE | |
739 | * | |
740 | * We only expose to userspace a subset of the state flags in | |
741 | * i_state_flags | |
742 | */ | |
743 | #define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001 | |
744 | #define EXT4_STATE_FLAG_NEW 0x00000002 | |
745 | #define EXT4_STATE_FLAG_NEWENTRY 0x00000004 | |
746 | #define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008 | |
783d9485 | 747 | |
351a0a3f LR |
748 | /* flags for ioctl EXT4_IOC_CHECKPOINT */ |
749 | #define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1 | |
750 | #define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2 | |
751 | #define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4 | |
752 | #define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \ | |
753 | EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \ | |
754 | EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) | |
755 | ||
d95efb14 JB |
756 | /* |
757 | * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID | |
758 | */ | |
759 | struct fsuuid { | |
760 | __u32 fsu_len; | |
761 | __u32 fsu_flags; | |
762 | __u8 fsu_uuid[]; | |
763 | }; | |
764 | ||
899ad0ce | 765 | #if defined(__KERNEL__) && defined(CONFIG_COMPAT) |
ac27a0ec DK |
766 | /* |
767 | * ioctl commands in 32 bit emulation | |
768 | */ | |
617ba13b MC |
769 | #define EXT4_IOC32_GETVERSION _IOR('f', 3, int) |
770 | #define EXT4_IOC32_SETVERSION _IOW('f', 4, int) | |
771 | #define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) | |
772 | #define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) | |
773 | #define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | |
4d92dc0f | 774 | #define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) |
617ba13b MC |
775 | #define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION |
776 | #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | |
899ad0ce | 777 | #endif |
ac27a0ec | 778 | |
bb5835ed TT |
779 | /* |
780 | * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag. | |
781 | * It indicates that the entry in extent status cache is for a hole. | |
782 | */ | |
783 | #define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 | |
784 | ||
b595076a | 785 | /* Max physical block we can address w/o extents */ |
fb0a387d ES |
786 | #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF |
787 | ||
bcd8e91f | 788 | /* Max logical block we can support */ |
9f44eda1 | 789 | #define EXT4_MAX_LOGICAL_BLOCK 0xFFFFFFFE |
bcd8e91f | 790 | |
ac27a0ec DK |
791 | /* |
792 | * Structure of an inode on the disk | |
793 | */ | |
617ba13b | 794 | struct ext4_inode { |
ac27a0ec DK |
795 | __le16 i_mode; /* File mode */ |
796 | __le16 i_uid; /* Low 16 bits of Owner Uid */ | |
a48380f7 | 797 | __le32 i_size_lo; /* Size in bytes */ |
ac27a0ec | 798 | __le32 i_atime; /* Access time */ |
ef7f3835 | 799 | __le32 i_ctime; /* Inode Change time */ |
ac27a0ec DK |
800 | __le32 i_mtime; /* Modification time */ |
801 | __le32 i_dtime; /* Deletion Time */ | |
802 | __le16 i_gid; /* Low 16 bits of Group Id */ | |
803 | __le16 i_links_count; /* Links count */ | |
0fc1b451 | 804 | __le32 i_blocks_lo; /* Blocks count */ |
ac27a0ec DK |
805 | __le32 i_flags; /* File flags */ |
806 | union { | |
807 | struct { | |
25ec56b5 | 808 | __le32 l_i_version; |
ac27a0ec DK |
809 | } linux1; |
810 | struct { | |
811 | __u32 h_i_translator; | |
812 | } hurd1; | |
813 | struct { | |
814 | __u32 m_i_reserved1; | |
815 | } masix1; | |
816 | } osd1; /* OS dependent 1 */ | |
617ba13b | 817 | __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */ |
ac27a0ec | 818 | __le32 i_generation; /* File version (for NFS) */ |
7973c0c1 | 819 | __le32 i_file_acl_lo; /* File ACL */ |
a48380f7 | 820 | __le32 i_size_high; |
f077d0d7 | 821 | __le32 i_obso_faddr; /* Obsoleted fragment address */ |
ac27a0ec DK |
822 | union { |
823 | struct { | |
0fc1b451 | 824 | __le16 l_i_blocks_high; /* were l_i_reserved1 */ |
a1ddeb7e | 825 | __le16 l_i_file_acl_high; |
8c55e204 | 826 | __le16 l_i_uid_high; /* these 2 fields */ |
ac27a0ec | 827 | __le16 l_i_gid_high; /* were reserved2[0] */ |
e6153918 DW |
828 | __le16 l_i_checksum_lo;/* crc32c(uuid+inum+inode) LE */ |
829 | __le16 l_i_reserved; | |
ac27a0ec DK |
830 | } linux2; |
831 | struct { | |
f077d0d7 | 832 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
ac27a0ec DK |
833 | __u16 h_i_mode_high; |
834 | __u16 h_i_uid_high; | |
835 | __u16 h_i_gid_high; | |
836 | __u32 h_i_author; | |
837 | } hurd2; | |
838 | struct { | |
f077d0d7 | 839 | __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */ |
a1ddeb7e | 840 | __le16 m_i_file_acl_high; |
ac27a0ec DK |
841 | __u32 m_i_reserved2[2]; |
842 | } masix2; | |
843 | } osd2; /* OS dependent 2 */ | |
844 | __le16 i_extra_isize; | |
e6153918 | 845 | __le16 i_checksum_hi; /* crc32c(uuid+inum+inode) BE */ |
ef7f3835 KS |
846 | __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */ |
847 | __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */ | |
848 | __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */ | |
849 | __le32 i_crtime; /* File Creation time */ | |
850 | __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ | |
25ec56b5 | 851 | __le32 i_version_hi; /* high 32 bits for 64-bit version */ |
8b4953e1 | 852 | __le32 i_projid; /* Project ID */ |
ac27a0ec DK |
853 | }; |
854 | ||
748de673 AF |
855 | struct move_extent { |
856 | __u32 reserved; /* should be zero */ | |
857 | __u32 donor_fd; /* donor file descriptor */ | |
858 | __u64 orig_start; /* logical start offset in block for orig */ | |
859 | __u64 donor_start; /* logical start offset in block for donor */ | |
860 | __u64 len; /* block length to be moved */ | |
861 | __u64 moved_len; /* moved block length */ | |
862 | }; | |
ac27a0ec | 863 | |
ef7f3835 KS |
864 | #define EXT4_EPOCH_BITS 2 |
865 | #define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1) | |
866 | #define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS) | |
867 | ||
868 | /* | |
869 | * Extended fields will fit into an inode if the filesystem was formatted | |
870 | * with large inodes (-I 256 or larger) and there are not currently any EAs | |
871 | * consuming all of the available space. For new inodes we always reserve | |
872 | * enough space for the kernel's known extended fields, but for inodes | |
873 | * created with an old kernel this might not have been the case. None of | |
874 | * the extended inode fields is critical for correct filesystem operation. | |
875 | * This macro checks if a certain field fits in the inode. Note that | |
876 | * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize | |
877 | */ | |
878 | #define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \ | |
879 | ((offsetof(typeof(*ext4_inode), field) + \ | |
880 | sizeof((ext4_inode)->field)) \ | |
881 | <= (EXT4_GOOD_OLD_INODE_SIZE + \ | |
882 | (einode)->i_extra_isize)) \ | |
883 | ||
a4dad1ae DT |
884 | /* |
885 | * We use an encoding that preserves the times for extra epoch "00": | |
886 | * | |
887 | * extra msb of adjust for signed | |
888 | * epoch 32-bit 32-bit tv_sec to | |
889 | * bits time decoded 64-bit tv_sec 64-bit tv_sec valid time range | |
890 | * 0 0 1 -0x80000000..-0x00000001 0x000000000 1901-12-13..1969-12-31 | |
891 | * 0 0 0 0x000000000..0x07fffffff 0x000000000 1970-01-01..2038-01-19 | |
892 | * 0 1 1 0x080000000..0x0ffffffff 0x100000000 2038-01-19..2106-02-07 | |
893 | * 0 1 0 0x100000000..0x17fffffff 0x100000000 2106-02-07..2174-02-25 | |
894 | * 1 0 1 0x180000000..0x1ffffffff 0x200000000 2174-02-25..2242-03-16 | |
895 | * 1 0 0 0x200000000..0x27fffffff 0x200000000 2242-03-16..2310-04-04 | |
896 | * 1 1 1 0x280000000..0x2ffffffff 0x300000000 2310-04-04..2378-04-22 | |
897 | * 1 1 0 0x300000000..0x37fffffff 0x300000000 2378-04-22..2446-05-10 | |
898 | * | |
899 | * Note that previous versions of the kernel on 64-bit systems would | |
900 | * incorrectly use extra epoch bits 1,1 for dates between 1901 and | |
901 | * 1970. e2fsck will correct this, assuming that it is run on the | |
902 | * affected filesystem before 2242. | |
903 | */ | |
904 | ||
7b62b293 | 905 | static inline __le32 ext4_encode_extra_time(struct timespec64 *time) |
ef7f3835 | 906 | { |
7b62b293 | 907 | u32 extra =((time->tv_sec - (s32)time->tv_sec) >> 32) & EXT4_EPOCH_MASK; |
a4dad1ae | 908 | return cpu_to_le32(extra | (time->tv_nsec << EXT4_EPOCH_BITS)); |
ef7f3835 KS |
909 | } |
910 | ||
7b62b293 AB |
911 | static inline void ext4_decode_extra_time(struct timespec64 *time, |
912 | __le32 extra) | |
ef7f3835 | 913 | { |
cd2d9922 | 914 | if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) |
a4dad1ae | 915 | time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; |
a4dad1ae | 916 | time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; |
ef7f3835 KS |
917 | } |
918 | ||
95582b00 DD |
919 | #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ |
920 | do { \ | |
95582b00 | 921 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\ |
4881c497 | 922 | (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \ |
95582b00 | 923 | (raw_inode)->xtime ## _extra = \ |
7b62b293 | 924 | ext4_encode_extra_time(&(inode)->xtime); \ |
95582b00 | 925 | } \ |
cba465b4 | 926 | else \ |
4881c497 | 927 | (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \ |
ef7f3835 KS |
928 | } while (0) |
929 | ||
930 | #define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \ | |
931 | do { \ | |
932 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ | |
933 | (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \ | |
934 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ | |
935 | (raw_inode)->xtime ## _extra = \ | |
936 | ext4_encode_extra_time(&(einode)->xtime); \ | |
937 | } while (0) | |
938 | ||
95582b00 DD |
939 | #define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \ |
940 | do { \ | |
941 | (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \ | |
942 | if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) { \ | |
7b62b293 | 943 | ext4_decode_extra_time(&(inode)->xtime, \ |
95582b00 | 944 | raw_inode->xtime ## _extra); \ |
95582b00 DD |
945 | } \ |
946 | else \ | |
947 | (inode)->xtime.tv_nsec = 0; \ | |
ef7f3835 KS |
948 | } while (0) |
949 | ||
95582b00 | 950 | |
ef7f3835 KS |
951 | #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ |
952 | do { \ | |
953 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \ | |
954 | (einode)->xtime.tv_sec = \ | |
955 | (signed)le32_to_cpu((raw_inode)->xtime); \ | |
19ea8060 TT |
956 | else \ |
957 | (einode)->xtime.tv_sec = 0; \ | |
ef7f3835 KS |
958 | if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ |
959 | ext4_decode_extra_time(&(einode)->xtime, \ | |
960 | raw_inode->xtime ## _extra); \ | |
af0b44a1 ES |
961 | else \ |
962 | (einode)->xtime.tv_nsec = 0; \ | |
ef7f3835 KS |
963 | } while (0) |
964 | ||
25ec56b5 JNC |
965 | #define i_disk_version osd1.linux1.l_i_version |
966 | ||
ac27a0ec DK |
967 | #if defined(__KERNEL__) || defined(__linux__) |
968 | #define i_reserved1 osd1.linux1.l_i_reserved1 | |
a1ddeb7e | 969 | #define i_file_acl_high osd2.linux2.l_i_file_acl_high |
0fc1b451 | 970 | #define i_blocks_high osd2.linux2.l_i_blocks_high |
ac27a0ec DK |
971 | #define i_uid_low i_uid |
972 | #define i_gid_low i_gid | |
973 | #define i_uid_high osd2.linux2.l_i_uid_high | |
974 | #define i_gid_high osd2.linux2.l_i_gid_high | |
e6153918 | 975 | #define i_checksum_lo osd2.linux2.l_i_checksum_lo |
ac27a0ec DK |
976 | |
977 | #elif defined(__GNU__) | |
978 | ||
979 | #define i_translator osd1.hurd1.h_i_translator | |
ac27a0ec DK |
980 | #define i_uid_high osd2.hurd2.h_i_uid_high |
981 | #define i_gid_high osd2.hurd2.h_i_gid_high | |
982 | #define i_author osd2.hurd2.h_i_author | |
983 | ||
984 | #elif defined(__masix__) | |
985 | ||
986 | #define i_reserved1 osd1.masix1.m_i_reserved1 | |
a1ddeb7e | 987 | #define i_file_acl_high osd2.masix2.m_i_file_acl_high |
ac27a0ec DK |
988 | #define i_reserved2 osd2.masix2.m_i_reserved2 |
989 | ||
990 | #endif /* defined(__KERNEL__) || defined(__linux__) */ | |
991 | ||
c0677e6d | 992 | #include "extents_status.h" |
6866d7b3 | 993 | #include "fast_commit.h" |
c0677e6d | 994 | |
daf647d2 TT |
995 | /* |
996 | * Lock subclasses for i_data_sem in the ext4_inode_info structure. | |
997 | * | |
998 | * These are needed to avoid lockdep false positives when we need to | |
999 | * allocate blocks to the quota inode during ext4_map_blocks(), while | |
1000 | * holding i_data_sem for a normal (non-quota) inode. Since we don't | |
1001 | * do quota tracking for the quota inode, this avoids deadlock (as | |
1002 | * well as infinite recursion, since it isn't turtles all the way | |
1003 | * down...) | |
1004 | * | |
1005 | * I_DATA_SEM_NORMAL - Used for most inodes | |
1006 | * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode | |
1007 | * where the second inode has larger inode number | |
1008 | * than the first | |
1009 | * I_DATA_SEM_QUOTA - Used for quota inodes only | |
1010 | */ | |
1011 | enum { | |
1012 | I_DATA_SEM_NORMAL = 0, | |
1013 | I_DATA_SEM_OTHER, | |
1014 | I_DATA_SEM_QUOTA, | |
1015 | }; | |
1016 | ||
1017 | ||
d444c3c3 TT |
1018 | /* |
1019 | * fourth extended file system inode data in memory | |
1020 | */ | |
1021 | struct ext4_inode_info { | |
1022 | __le32 i_data[15]; /* unconverted */ | |
d444c3c3 | 1023 | __u32 i_dtime; |
12e9b892 | 1024 | ext4_fsblk_t i_file_acl; |
d444c3c3 TT |
1025 | |
1026 | /* | |
1027 | * i_block_group is the number of the block group which contains | |
1028 | * this file's inode. Constant across the lifetime of the inode, | |
a627b0a7 | 1029 | * it is used for making block allocation decisions - we try to |
d444c3c3 TT |
1030 | * place a file's data blocks near its inode block, and new inodes |
1031 | * near to their parent directory's inode. | |
1032 | */ | |
1033 | ext4_group_t i_block_group; | |
8a2005d3 | 1034 | ext4_lblk_t i_dir_start_lookup; |
353eb83c | 1035 | #if (BITS_PER_LONG < 64) |
19f5fb7a | 1036 | unsigned long i_state_flags; /* Dynamic state flags */ |
353eb83c | 1037 | #endif |
12e9b892 | 1038 | unsigned long i_flags; |
d444c3c3 | 1039 | |
d444c3c3 TT |
1040 | /* |
1041 | * Extended attributes can be read independently of the main file | |
f340b3d9 | 1042 | * data. Taking i_rwsem even when reading would cause contention |
d444c3c3 TT |
1043 | * between readers of EAs and writers of regular file data, so |
1044 | * instead we synchronize on xattr_sem when reading or changing | |
1045 | * EAs. | |
1046 | */ | |
1047 | struct rw_semaphore xattr_sem; | |
d444c3c3 | 1048 | |
02f310fc JK |
1049 | /* |
1050 | * Inodes with EXT4_STATE_ORPHAN_FILE use i_orphan_idx. Otherwise | |
1051 | * i_orphan is used. | |
1052 | */ | |
1053 | union { | |
1054 | struct list_head i_orphan; /* unlinked but open inodes */ | |
1055 | unsigned int i_orphan_idx; /* Index in orphan file */ | |
1056 | }; | |
d444c3c3 | 1057 | |
aa75f4d3 HS |
1058 | /* Fast commit related info */ |
1059 | ||
b3998b3b RH |
1060 | /* For tracking dentry create updates */ |
1061 | struct list_head i_fc_dilist; | |
aa75f4d3 HS |
1062 | struct list_head i_fc_list; /* |
1063 | * inodes that need fast commit | |
1064 | * protected by sbi->s_fc_lock. | |
1065 | */ | |
1066 | ||
aa75f4d3 HS |
1067 | /* Start of lblk range that needs to be committed in this fast commit */ |
1068 | ext4_lblk_t i_fc_lblk_start; | |
1069 | ||
1070 | /* End of lblk range that needs to be committed in this fast commit */ | |
1071 | ext4_lblk_t i_fc_lblk_len; | |
1072 | ||
1073 | /* Number of ongoing updates on this inode */ | |
1074 | atomic_t i_fc_updates; | |
1075 | ||
1076 | /* Fast commit wait queue for this inode */ | |
1077 | wait_queue_head_t i_fc_wait; | |
1078 | ||
1079 | /* Protect concurrent accesses on i_fc_lblk_start, i_fc_lblk_len */ | |
1080 | struct mutex i_fc_lock; | |
1081 | ||
d444c3c3 TT |
1082 | /* |
1083 | * i_disksize keeps track of what the inode size is ON DISK, not | |
1084 | * in memory. During truncate, i_size is set to the new size by | |
1085 | * the VFS prior to calling ext4_truncate(), but the filesystem won't | |
1086 | * set i_disksize to 0 until the truncate is actually under way. | |
1087 | * | |
1088 | * The intent is that i_disksize always represents the blocks which | |
1089 | * are used by this file. This allows recovery to restart truncate | |
1090 | * on orphans if we crash during truncate. We actually write i_disksize | |
1091 | * into the on-disk inode when writing inodes out, instead of i_size. | |
1092 | * | |
1093 | * The only time when i_disksize and i_size may be different is when | |
1094 | * a truncate is in progress. The only things which change i_disksize | |
1095 | * are ext4_get_block (growth) and ext4_truncate (shrinkth). | |
1096 | */ | |
1097 | loff_t i_disksize; | |
1098 | ||
1099 | /* | |
1100 | * i_data_sem is for serialising ext4_truncate() against | |
1101 | * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's | |
1102 | * data tree are chopped off during truncate. We can't do that in | |
1103 | * ext4 because whenever we perform intermediate commits during | |
1104 | * truncate, the inode and all the metadata blocks *must* be in a | |
1105 | * consistent state which allows truncation of the orphans to restart | |
1106 | * during recovery. Hence we must fix the get_block-vs-truncate race | |
1107 | * by other means, so we have i_data_sem. | |
1108 | */ | |
1109 | struct rw_semaphore i_data_sem; | |
1110 | struct inode vfs_inode; | |
8aefcd55 | 1111 | struct jbd2_inode *jinode; |
d444c3c3 | 1112 | |
202ee5df TT |
1113 | spinlock_t i_raw_lock; /* protects updates to the raw inode */ |
1114 | ||
d444c3c3 TT |
1115 | /* |
1116 | * File creation time. Its function is same as that of | |
7b62b293 | 1117 | * struct timespec64 i_{a,c,m}time in the generic inode. |
d444c3c3 | 1118 | */ |
7b62b293 | 1119 | struct timespec64 i_crtime; |
d444c3c3 TT |
1120 | |
1121 | /* mballoc */ | |
27bc446e | 1122 | atomic_t i_prealloc_active; |
d444c3c3 TT |
1123 | struct list_head i_prealloc_list; |
1124 | spinlock_t i_prealloc_lock; | |
1125 | ||
c0677e6d ZL |
1126 | /* extents status tree */ |
1127 | struct ext4_es_tree i_es_tree; | |
1128 | rwlock_t i_es_lock; | |
edaa53ca | 1129 | struct list_head i_es_list; |
eb68d0e2 | 1130 | unsigned int i_es_all_nr; /* protected by i_es_lock */ |
edaa53ca | 1131 | unsigned int i_es_shk_nr; /* protected by i_es_lock */ |
dd475925 JK |
1132 | ext4_lblk_t i_es_shrink_lblk; /* Offset where we start searching for |
1133 | extents to shrink. Protected by | |
1134 | i_es_lock */ | |
c0677e6d | 1135 | |
d444c3c3 TT |
1136 | /* ialloc */ |
1137 | ext4_group_t i_last_alloc_group; | |
1138 | ||
1139 | /* allocation reservation info for delalloc */ | |
a627b0a7 | 1140 | /* In case of bigalloc, this refer to clusters rather than blocks */ |
d444c3c3 | 1141 | unsigned int i_reserved_data_blocks; |
d444c3c3 | 1142 | |
1dc0aa46 EW |
1143 | /* pending cluster reservations for bigalloc file systems */ |
1144 | struct ext4_pending_tree i_pending_tree; | |
1145 | ||
d444c3c3 TT |
1146 | /* on-disk additional length */ |
1147 | __u16 i_extra_isize; | |
1148 | ||
67cf5b09 TM |
1149 | /* Indicate the inline data space. */ |
1150 | u16 i_inline_off; | |
1151 | u16 i_inline_size; | |
1152 | ||
a9e7f447 DM |
1153 | #ifdef CONFIG_QUOTA |
1154 | /* quota space reservation, managed internally by quota code */ | |
1155 | qsize_t i_reserved_quota; | |
1156 | #endif | |
8d5d02e6 | 1157 | |
2e8fa54e | 1158 | /* Lock protecting lists below */ |
744692dc | 1159 | spinlock_t i_completed_io_lock; |
2e8fa54e JK |
1160 | /* |
1161 | * Completed IOs that need unwritten extents handling and have | |
1162 | * transaction reserved | |
1163 | */ | |
1164 | struct list_head i_rsv_conversion_list; | |
2e8fa54e | 1165 | struct work_struct i_rsv_conversion_work; |
600be30a | 1166 | atomic_t i_unwritten; /* Nr. of inflight conversions pending */ |
8a2005d3 TT |
1167 | |
1168 | spinlock_t i_block_reservation_lock; | |
b436b9be JK |
1169 | |
1170 | /* | |
1171 | * Transactions that contain inode's metadata needed to complete | |
1172 | * fsync and fdatasync, respectively. | |
1173 | */ | |
1174 | tid_t i_sync_tid; | |
1175 | tid_t i_datasync_tid; | |
814525f4 | 1176 | |
96c7e0d9 JK |
1177 | #ifdef CONFIG_QUOTA |
1178 | struct dquot *i_dquot[MAXQUOTAS]; | |
1179 | #endif | |
1180 | ||
814525f4 DW |
1181 | /* Precomputed uuid+inum+igen checksum for seeding inode checksums */ |
1182 | __u32 i_csum_seed; | |
b30ab0e0 | 1183 | |
040cb378 | 1184 | kprojid_t i_projid; |
d444c3c3 TT |
1185 | }; |
1186 | ||
ac27a0ec DK |
1187 | /* |
1188 | * File system states | |
1189 | */ | |
617ba13b MC |
1190 | #define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */ |
1191 | #define EXT4_ERROR_FS 0x0002 /* Errors detected */ | |
1192 | #define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */ | |
8016e29f | 1193 | #define EXT4_FC_REPLAY 0x0020 /* Fast commit replay ongoing */ |
ac27a0ec | 1194 | |
469108ff TT |
1195 | /* |
1196 | * Misc. filesystem flags | |
1197 | */ | |
1198 | #define EXT2_FLAGS_SIGNED_HASH 0x0001 /* Signed dirhash in use */ | |
1199 | #define EXT2_FLAGS_UNSIGNED_HASH 0x0002 /* Unsigned dirhash in use */ | |
1200 | #define EXT2_FLAGS_TEST_FILESYS 0x0004 /* to test development code */ | |
1201 | ||
ac27a0ec | 1202 | /* |
68911009 | 1203 | * Mount flags set via mount options or defaults |
ac27a0ec | 1204 | */ |
cdb7ee4c | 1205 | #define EXT4_MOUNT_NO_MBCACHE 0x00001 /* Do not use mbcache */ |
617ba13b MC |
1206 | #define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */ |
1207 | #define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */ | |
1208 | #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ | |
1209 | #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ | |
1210 | #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ | |
39ef17f1 | 1211 | #define EXT4_MOUNT_ERRORS_MASK 0x00070 |
617ba13b MC |
1212 | #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ |
1213 | #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ | |
923ae0ff | 1214 | #ifdef CONFIG_FS_DAX |
fc626fe3 | 1215 | #define EXT4_MOUNT_DAX_ALWAYS 0x00200 /* Direct Access */ |
923ae0ff | 1216 | #else |
fc626fe3 | 1217 | #define EXT4_MOUNT_DAX_ALWAYS 0 |
923ae0ff | 1218 | #endif |
617ba13b MC |
1219 | #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ |
1220 | #define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */ | |
1221 | #define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */ | |
1222 | #define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */ | |
1223 | #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ | |
1224 | #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ | |
1225 | #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ | |
1226 | #define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ | |
afd4672d | 1227 | #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ |
617ba13b | 1228 | #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ |
49da9392 JK |
1229 | #define EXT4_MOUNT_QUOTA 0x40000 /* Some quota option set */ |
1230 | #define EXT4_MOUNT_USRQUOTA 0x80000 /* "old" user quota, | |
1231 | * enable enforcement for hidden | |
1232 | * quota files */ | |
1233 | #define EXT4_MOUNT_GRPQUOTA 0x100000 /* "old" group quota, enable | |
1234 | * enforcement for hidden quota | |
1235 | * files */ | |
1236 | #define EXT4_MOUNT_PRJQUOTA 0x200000 /* Enable project quota | |
1237 | * enforcement */ | |
744692dc | 1238 | #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ |
d4da6c9c | 1239 | #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ |
818d276c | 1240 | #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ |
327eaf73 | 1241 | #define EXT4_MOUNT_WARN_ON_ERROR 0x2000000 /* Trigger WARN_ON on error */ |
21175ca4 | 1242 | #define EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS 0x4000000 |
64769240 | 1243 | #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ |
5bf5683a | 1244 | #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ |
6fd058f7 | 1245 | #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ |
5328e635 | 1246 | #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ |
bfff6873 | 1247 | #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ |
5bf5683a | 1248 | |
68911009 LC |
1249 | /* |
1250 | * Mount flags set either automatically (could not be set by mount option) | |
1251 | * based on per file system feature or property or in special cases such as | |
1252 | * distinguishing between explicit mount option definition and default. | |
1253 | */ | |
56889787 TT |
1254 | #define EXT4_MOUNT2_EXPLICIT_DELALLOC 0x00000001 /* User explicitly |
1255 | specified delalloc */ | |
68911009 LC |
1256 | #define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group |
1257 | size of blocksize * 8 | |
1258 | blocks */ | |
ed3654eb TT |
1259 | #define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated |
1260 | file systems */ | |
1e381f60 DM |
1261 | #define EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM 0x00000008 /* User explicitly |
1262 | specified journal checksum */ | |
1263 | ||
995a3ed6 | 1264 | #define EXT4_MOUNT2_JOURNAL_FAST_COMMIT 0x00000010 /* Journal fast commit */ |
a72b38ee HS |
1265 | #define EXT4_MOUNT2_DAX_NEVER 0x00000020 /* Do not allow Direct Access */ |
1266 | #define EXT4_MOUNT2_DAX_INODE 0x00000040 /* For printing options only */ | |
196e402a HS |
1267 | #define EXT4_MOUNT2_MB_OPTIMIZE_SCAN 0x00000080 /* Optimize group |
1268 | * scanning in mballoc | |
1269 | */ | |
995a3ed6 | 1270 | |
fd8c37ec TT |
1271 | #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ |
1272 | ~EXT4_MOUNT_##opt | |
1273 | #define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ | |
1274 | EXT4_MOUNT_##opt | |
617ba13b MC |
1275 | #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ |
1276 | EXT4_MOUNT_##opt) | |
ac27a0ec | 1277 | |
a2595b8a TT |
1278 | #define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ |
1279 | ~EXT4_MOUNT2_##opt | |
1280 | #define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ | |
1281 | EXT4_MOUNT2_##opt | |
1282 | #define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ | |
1283 | EXT4_MOUNT2_##opt) | |
1284 | ||
597d508c AM |
1285 | #define ext4_test_and_set_bit __test_and_set_bit_le |
1286 | #define ext4_set_bit __set_bit_le | |
617ba13b | 1287 | #define ext4_set_bit_atomic ext2_set_bit_atomic |
597d508c AM |
1288 | #define ext4_test_and_clear_bit __test_and_clear_bit_le |
1289 | #define ext4_clear_bit __clear_bit_le | |
617ba13b | 1290 | #define ext4_clear_bit_atomic ext2_clear_bit_atomic |
50e0168c | 1291 | #define ext4_test_bit test_bit_le |
50e0168c AM |
1292 | #define ext4_find_next_zero_bit find_next_zero_bit_le |
1293 | #define ext4_find_next_bit find_next_bit_le | |
ac27a0ec | 1294 | |
123e3016 | 1295 | extern void mb_set_bits(void *bm, int cur, int len); |
c3e94d1d | 1296 | |
ac27a0ec DK |
1297 | /* |
1298 | * Maximal mount counts between two filesystem checks | |
1299 | */ | |
617ba13b MC |
1300 | #define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
1301 | #define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */ | |
ac27a0ec DK |
1302 | |
1303 | /* | |
1304 | * Behaviour when detecting errors | |
1305 | */ | |
617ba13b MC |
1306 | #define EXT4_ERRORS_CONTINUE 1 /* Continue execution */ |
1307 | #define EXT4_ERRORS_RO 2 /* Remount fs read-only */ | |
1308 | #define EXT4_ERRORS_PANIC 3 /* Panic */ | |
1309 | #define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE | |
ac27a0ec | 1310 | |
e6153918 DW |
1311 | /* Metadata checksum algorithm codes */ |
1312 | #define EXT4_CRC32C_CHKSUM 1 | |
1313 | ||
bbc605cd LC |
1314 | #define EXT4_LABEL_MAX 16 |
1315 | ||
ac27a0ec DK |
1316 | /* |
1317 | * Structure of the super block | |
1318 | */ | |
617ba13b | 1319 | struct ext4_super_block { |
ac27a0ec | 1320 | /*00*/ __le32 s_inodes_count; /* Inodes count */ |
6bc9feff | 1321 | __le32 s_blocks_count_lo; /* Blocks count */ |
308ba3ec AK |
1322 | __le32 s_r_blocks_count_lo; /* Reserved blocks count */ |
1323 | __le32 s_free_blocks_count_lo; /* Free blocks count */ | |
ac27a0ec DK |
1324 | /*10*/ __le32 s_free_inodes_count; /* Free inodes count */ |
1325 | __le32 s_first_data_block; /* First Data Block */ | |
1326 | __le32 s_log_block_size; /* Block size */ | |
281b5995 | 1327 | __le32 s_log_cluster_size; /* Allocation cluster size */ |
ac27a0ec | 1328 | /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */ |
281b5995 | 1329 | __le32 s_clusters_per_group; /* # Clusters per group */ |
ac27a0ec DK |
1330 | __le32 s_inodes_per_group; /* # Inodes per group */ |
1331 | __le32 s_mtime; /* Mount time */ | |
1332 | /*30*/ __le32 s_wtime; /* Write time */ | |
1333 | __le16 s_mnt_count; /* Mount count */ | |
1334 | __le16 s_max_mnt_count; /* Maximal mount count */ | |
1335 | __le16 s_magic; /* Magic signature */ | |
1336 | __le16 s_state; /* File system state */ | |
1337 | __le16 s_errors; /* Behaviour when detecting errors */ | |
1338 | __le16 s_minor_rev_level; /* minor revision level */ | |
1339 | /*40*/ __le32 s_lastcheck; /* time of last check */ | |
1340 | __le32 s_checkinterval; /* max. time between checks */ | |
1341 | __le32 s_creator_os; /* OS */ | |
1342 | __le32 s_rev_level; /* Revision level */ | |
1343 | /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */ | |
1344 | __le16 s_def_resgid; /* Default gid for reserved blocks */ | |
1345 | /* | |
617ba13b | 1346 | * These fields are for EXT4_DYNAMIC_REV superblocks only. |
ac27a0ec DK |
1347 | * |
1348 | * Note: the difference between the compatible feature set and | |
1349 | * the incompatible feature set is that if there is a bit set | |
1350 | * in the incompatible feature set that the kernel doesn't | |
1351 | * know about, it should refuse to mount the filesystem. | |
1352 | * | |
1353 | * e2fsck's requirements are more strict; if it doesn't know | |
1354 | * about a feature in either the compatible or incompatible | |
1355 | * feature set, it must abort and not try to meddle with | |
1356 | * things it doesn't understand... | |
1357 | */ | |
1358 | __le32 s_first_ino; /* First non-reserved inode */ | |
0d1ee42f | 1359 | __le16 s_inode_size; /* size of inode structure */ |
ac27a0ec DK |
1360 | __le16 s_block_group_nr; /* block group # of this superblock */ |
1361 | __le32 s_feature_compat; /* compatible feature set */ | |
1362 | /*60*/ __le32 s_feature_incompat; /* incompatible feature set */ | |
1363 | __le32 s_feature_ro_compat; /* readonly-compatible feature set */ | |
1364 | /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */ | |
bbc605cd | 1365 | /*78*/ char s_volume_name[EXT4_LABEL_MAX]; /* volume name */ |
072ebb3b | 1366 | /*88*/ char s_last_mounted[64] __nonstring; /* directory where last mounted */ |
ac27a0ec DK |
1367 | /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */ |
1368 | /* | |
1369 | * Performance hints. Directory preallocation should only | |
617ba13b | 1370 | * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
ac27a0ec DK |
1371 | */ |
1372 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ | |
1373 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ | |
1374 | __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */ | |
1375 | /* | |
617ba13b | 1376 | * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set. |
ac27a0ec DK |
1377 | */ |
1378 | /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */ | |
1379 | /*E0*/ __le32 s_journal_inum; /* inode number of journal file */ | |
1380 | __le32 s_journal_dev; /* device number of journal file */ | |
1381 | __le32 s_last_orphan; /* start of list of inodes to delete */ | |
1382 | __le32 s_hash_seed[4]; /* HTREE hash seed */ | |
1383 | __u8 s_def_hash_version; /* Default hash version to use */ | |
89eeddf0 | 1384 | __u8 s_jnl_backup_type; |
0d1ee42f | 1385 | __le16 s_desc_size; /* size of group descriptor */ |
bd81d8ee | 1386 | /*100*/ __le32 s_default_mount_opts; |
ac27a0ec | 1387 | __le32 s_first_meta_bg; /* First metablock block group */ |
bd81d8ee LV |
1388 | __le32 s_mkfs_time; /* When the filesystem was created */ |
1389 | __le32 s_jnl_blocks[17]; /* Backup of the journal inode */ | |
1390 | /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */ | |
1391 | /*150*/ __le32 s_blocks_count_hi; /* Blocks count */ | |
1392 | __le32 s_r_blocks_count_hi; /* Reserved blocks count */ | |
1393 | __le32 s_free_blocks_count_hi; /* Free blocks count */ | |
c1bddad9 AK |
1394 | __le16 s_min_extra_isize; /* All inodes have at least # bytes */ |
1395 | __le16 s_want_extra_isize; /* New inodes should reserve # bytes */ | |
1396 | __le32 s_flags; /* Miscellaneous flags */ | |
1397 | __le16 s_raid_stride; /* RAID stride */ | |
c5e06d10 | 1398 | __le16 s_mmp_update_interval; /* # seconds to wait in MMP checking */ |
c1bddad9 AK |
1399 | __le64 s_mmp_block; /* Block for multi-mount protection */ |
1400 | __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/ | |
772cb7c8 | 1401 | __u8 s_log_groups_per_flex; /* FLEX_BG group size */ |
e6153918 | 1402 | __u8 s_checksum_type; /* metadata checksum algorithm used */ |
f542fbe8 TT |
1403 | __u8 s_encryption_level; /* versioning level for encryption */ |
1404 | __u8 s_reserved_pad; /* Padding to next 32bits */ | |
afc32f7e | 1405 | __le64 s_kbytes_written; /* nr of lifetime kilobytes written */ |
4a9cdec7 TT |
1406 | __le32 s_snapshot_inum; /* Inode number of active snapshot */ |
1407 | __le32 s_snapshot_id; /* sequential ID of active snapshot */ | |
1408 | __le64 s_snapshot_r_blocks_count; /* reserved blocks for active | |
1409 | snapshot's future use */ | |
1410 | __le32 s_snapshot_list; /* inode number of the head of the | |
1411 | on-disk snapshot list */ | |
1c13d5c0 TT |
1412 | #define EXT4_S_ERR_START offsetof(struct ext4_super_block, s_error_count) |
1413 | __le32 s_error_count; /* number of fs errors */ | |
1414 | __le32 s_first_error_time; /* first time an error happened */ | |
1415 | __le32 s_first_error_ino; /* inode involved in first error */ | |
1416 | __le64 s_first_error_block; /* block involved of first error */ | |
072ebb3b | 1417 | __u8 s_first_error_func[32] __nonstring; /* function where the error happened */ |
1c13d5c0 TT |
1418 | __le32 s_first_error_line; /* line number where error happened */ |
1419 | __le32 s_last_error_time; /* most recent time of an error */ | |
1420 | __le32 s_last_error_ino; /* inode involved in last error */ | |
1421 | __le32 s_last_error_line; /* line number where error happened */ | |
1422 | __le64 s_last_error_block; /* block involved of last error */ | |
072ebb3b | 1423 | __u8 s_last_error_func[32] __nonstring; /* function where the error happened */ |
8b67f04a TT |
1424 | #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts) |
1425 | __u8 s_mount_opts[64]; | |
281b5995 TT |
1426 | __le32 s_usr_quota_inum; /* inode for tracking user quota */ |
1427 | __le32 s_grp_quota_inum; /* inode for tracking group quota */ | |
1428 | __le32 s_overhead_clusters; /* overhead blocks/clusters in fs */ | |
1beeef1b | 1429 | __le32 s_backup_bgs[2]; /* groups with sparse_super2 SBs */ |
3edc18d8 | 1430 | __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ |
f542fbe8 TT |
1431 | __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ |
1432 | __le32 s_lpf_ino; /* Location of the lost+found inode */ | |
8b4953e1 | 1433 | __le32 s_prj_quota_inum; /* inode for tracking project quota */ |
8c81bd8f | 1434 | __le32 s_checksum_seed; /* crc32c(uuid) if csum_seed set */ |
6a0678a7 AB |
1435 | __u8 s_wtime_hi; |
1436 | __u8 s_mtime_hi; | |
1437 | __u8 s_mkfs_time_hi; | |
1438 | __u8 s_lastcheck_hi; | |
1439 | __u8 s_first_error_time_hi; | |
1440 | __u8 s_last_error_time_hi; | |
878520ac TT |
1441 | __u8 s_first_error_errcode; |
1442 | __u8 s_last_error_errcode; | |
c83ad55e GKB |
1443 | __le16 s_encoding; /* Filename charset encoding */ |
1444 | __le16 s_encoding_flags; /* Filename charset encoding flags */ | |
02f310fc JK |
1445 | __le32 s_orphan_file_inum; /* Inode for tracking orphan inodes */ |
1446 | __le32 s_reserved[94]; /* Padding to the end of the block */ | |
e6153918 | 1447 | __le32 s_checksum; /* crc32c(superblock) */ |
ac27a0ec DK |
1448 | }; |
1449 | ||
1c13d5c0 TT |
1450 | #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START) |
1451 | ||
ac27a0ec | 1452 | #ifdef __KERNEL__ |
bc0b0d6d | 1453 | |
a2d4a646 | 1454 | /* Number of quota types we support */ |
689c958c | 1455 | #define EXT4_MAXQUOTAS 3 |
a2d4a646 | 1456 | |
c83ad55e GKB |
1457 | #define EXT4_ENC_UTF8_12_1 1 |
1458 | ||
188c299e JK |
1459 | /* Types of ext4 journal triggers */ |
1460 | enum ext4_journal_trigger_type { | |
02f310fc | 1461 | EXT4_JTR_ORPHAN_FILE, |
188c299e JK |
1462 | EXT4_JTR_NONE /* This must be the last entry for indexing to work! */ |
1463 | }; | |
1464 | ||
1465 | #define EXT4_JOURNAL_TRIGGER_COUNT EXT4_JTR_NONE | |
1466 | ||
1467 | struct ext4_journal_trigger { | |
1468 | struct jbd2_buffer_trigger_type tr_triggers; | |
1469 | struct super_block *sb; | |
1470 | }; | |
1471 | ||
1472 | static inline struct ext4_journal_trigger *EXT4_TRIGGER( | |
1473 | struct jbd2_buffer_trigger_type *trigger) | |
1474 | { | |
1475 | return container_of(trigger, struct ext4_journal_trigger, tr_triggers); | |
1476 | } | |
1477 | ||
02f310fc JK |
1478 | #define EXT4_ORPHAN_BLOCK_MAGIC 0x0b10ca04 |
1479 | ||
1480 | /* Structure at the tail of orphan block */ | |
1481 | struct ext4_orphan_block_tail { | |
1482 | __le32 ob_magic; | |
1483 | __le32 ob_checksum; | |
1484 | }; | |
1485 | ||
1486 | static inline int ext4_inodes_per_orphan_block(struct super_block *sb) | |
1487 | { | |
1488 | return (sb->s_blocksize - sizeof(struct ext4_orphan_block_tail)) / | |
1489 | sizeof(u32); | |
1490 | } | |
1491 | ||
1492 | struct ext4_orphan_block { | |
4a79a98c | 1493 | atomic_t ob_free_entries; /* Number of free orphan entries in block */ |
02f310fc JK |
1494 | struct buffer_head *ob_bh; /* Buffer for orphan block */ |
1495 | }; | |
1496 | ||
1497 | /* | |
1498 | * Info about orphan file. | |
1499 | */ | |
1500 | struct ext4_orphan_info { | |
02f310fc JK |
1501 | int of_blocks; /* Number of orphan blocks in a file */ |
1502 | __u32 of_csum_seed; /* Checksum seed for orphan file */ | |
1503 | struct ext4_orphan_block *of_binfo; /* Array with info about orphan | |
1504 | * file blocks */ | |
1505 | }; | |
1506 | ||
ca0faba0 TT |
1507 | /* |
1508 | * fourth extended-fs super-block data in memory | |
1509 | */ | |
1510 | struct ext4_sb_info { | |
1511 | unsigned long s_desc_size; /* Size of a group descriptor in bytes */ | |
1512 | unsigned long s_inodes_per_block;/* Number of inodes per block */ | |
1513 | unsigned long s_blocks_per_group;/* Number of blocks in a group */ | |
281b5995 | 1514 | unsigned long s_clusters_per_group; /* Number of clusters in a group */ |
ca0faba0 TT |
1515 | unsigned long s_inodes_per_group;/* Number of inodes in a group */ |
1516 | unsigned long s_itb_per_group; /* Number of inode table blocks per group */ | |
1517 | unsigned long s_gdb_count; /* Number of group descriptor blocks */ | |
1518 | unsigned long s_desc_per_block; /* Number of group descriptors per block */ | |
1519 | ext4_group_t s_groups_count; /* Number of groups in the fs */ | |
fb0a387d | 1520 | ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */ |
952fc18e | 1521 | unsigned long s_overhead; /* # of fs overhead clusters */ |
281b5995 TT |
1522 | unsigned int s_cluster_ratio; /* Number of blocks per cluster */ |
1523 | unsigned int s_cluster_bits; /* log2 of s_cluster_ratio */ | |
ca0faba0 TT |
1524 | loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ |
1525 | struct buffer_head * s_sbh; /* Buffer containing the super block */ | |
1526 | struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ | |
1d0c3924 | 1527 | struct buffer_head * __rcu *s_group_desc; |
7f4520cc | 1528 | unsigned int s_mount_opt; |
a2595b8a | 1529 | unsigned int s_mount_opt2; |
9b5f6c9b | 1530 | unsigned long s_mount_flags; |
5a916be1 | 1531 | unsigned int s_def_mount_opt; |
ca0faba0 | 1532 | ext4_fsblk_t s_sb_block; |
27dd4385 | 1533 | atomic64_t s_resv_clusters; |
08cefc7a EB |
1534 | kuid_t s_resuid; |
1535 | kgid_t s_resgid; | |
ca0faba0 TT |
1536 | unsigned short s_mount_state; |
1537 | unsigned short s_pad; | |
1538 | int s_addr_per_block_bits; | |
1539 | int s_desc_per_block_bits; | |
1540 | int s_inode_size; | |
1541 | int s_first_ino; | |
1542 | unsigned int s_inode_readahead_blks; | |
11013911 | 1543 | unsigned int s_inode_goal; |
ca0faba0 TT |
1544 | u32 s_hash_seed[4]; |
1545 | int s_def_hash_version; | |
6d2424a8 | 1546 | int s_hash_unsigned; /* 3 if hash should be unsigned, 0 if not */ |
57042651 | 1547 | struct percpu_counter s_freeclusters_counter; |
ca0faba0 TT |
1548 | struct percpu_counter s_freeinodes_counter; |
1549 | struct percpu_counter s_dirs_counter; | |
57042651 | 1550 | struct percpu_counter s_dirtyclusters_counter; |
efc61345 | 1551 | struct percpu_counter s_sra_exceeded_retry_limit; |
ca0faba0 TT |
1552 | struct blockgroup_lock *s_blockgroup_lock; |
1553 | struct proc_dir_entry *s_proc; | |
1554 | struct kobject s_kobj; | |
1555 | struct completion s_kobj_unregister; | |
2c0544b2 | 1556 | struct super_block *s_sb; |
618f0031 | 1557 | struct buffer_head *s_mmp_bh; |
ca0faba0 TT |
1558 | |
1559 | /* Journaling */ | |
ca0faba0 | 1560 | struct journal_s *s_journal; |
9549a168 | 1561 | unsigned long s_ext4_flags; /* Ext4 superblock flags */ |
02f310fc JK |
1562 | struct mutex s_orphan_lock; /* Protects on disk list changes */ |
1563 | struct list_head s_orphan; /* List of orphaned inodes in on disk | |
1564 | list */ | |
1565 | struct ext4_orphan_info s_orphan_info; | |
ca0faba0 TT |
1566 | unsigned long s_commit_interval; |
1567 | u32 s_max_batch_time; | |
1568 | u32 s_min_batch_time; | |
ee7ed3aa | 1569 | struct block_device *s_journal_bdev; |
ca0faba0 | 1570 | #ifdef CONFIG_QUOTA |
33458eab TT |
1571 | /* Names of quota files with journalled quota */ |
1572 | char __rcu *s_qf_names[EXT4_MAXQUOTAS]; | |
ca0faba0 TT |
1573 | int s_jquota_fmt; /* Format of quota to use */ |
1574 | #endif | |
1575 | unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ | |
dd0db94f | 1576 | struct ext4_system_blocks __rcu *s_system_blks; |
ca0faba0 TT |
1577 | |
1578 | #ifdef EXTENTS_STATS | |
1579 | /* ext4 extents stats */ | |
1580 | unsigned long s_ext_min; | |
1581 | unsigned long s_ext_max; | |
1582 | unsigned long s_depth_max; | |
1583 | spinlock_t s_ext_stats_lock; | |
1584 | unsigned long s_ext_blocks; | |
1585 | unsigned long s_ext_extents; | |
1586 | #endif | |
1587 | ||
1588 | /* for buddy allocator */ | |
df3da4ea | 1589 | struct ext4_group_info ** __rcu *s_group_info; |
ca0faba0 | 1590 | struct inode *s_buddy_cache; |
ca0faba0 | 1591 | spinlock_t s_md_lock; |
ca0faba0 TT |
1592 | unsigned short *s_mb_offsets; |
1593 | unsigned int *s_mb_maxs; | |
28623c2f | 1594 | unsigned int s_group_info_size; |
d08854f5 | 1595 | unsigned int s_mb_free_pending; |
a0154344 DJ |
1596 | struct list_head s_freed_data_list; /* List of blocks to be freed |
1597 | after commit completed */ | |
55cdd0af WJ |
1598 | struct list_head s_discard_list; |
1599 | struct work_struct s_discard_work; | |
5036ab8d | 1600 | atomic_t s_retry_alloc_pending; |
83e80a6e JK |
1601 | struct list_head *s_mb_avg_fragment_size; |
1602 | rwlock_t *s_mb_avg_fragment_size_locks; | |
196e402a HS |
1603 | struct list_head *s_mb_largest_free_orders; |
1604 | rwlock_t *s_mb_largest_free_orders_locks; | |
ca0faba0 TT |
1605 | |
1606 | /* tunables */ | |
1607 | unsigned long s_stripe; | |
196e402a | 1608 | unsigned int s_mb_max_linear_groups; |
ca0faba0 TT |
1609 | unsigned int s_mb_stream_request; |
1610 | unsigned int s_mb_max_to_scan; | |
1611 | unsigned int s_mb_min_to_scan; | |
1612 | unsigned int s_mb_stats; | |
1613 | unsigned int s_mb_order2_reqs; | |
1614 | unsigned int s_mb_group_prealloc; | |
27bc446e | 1615 | unsigned int s_mb_max_inode_prealloc; |
df981d03 | 1616 | unsigned int s_max_dir_size_kb; |
ca0faba0 TT |
1617 | /* where last allocation was done - for stream allocation */ |
1618 | unsigned long s_mb_last_group; | |
1619 | unsigned long s_mb_last_start; | |
cfd73237 AZ |
1620 | unsigned int s_mb_prefetch; |
1621 | unsigned int s_mb_prefetch_limit; | |
ca0faba0 | 1622 | |
ca0faba0 | 1623 | /* stats for buddy allocator */ |
ca0faba0 TT |
1624 | atomic_t s_bal_reqs; /* number of reqs with len > 1 */ |
1625 | atomic_t s_bal_success; /* we found long enough chunks */ | |
1626 | atomic_t s_bal_allocated; /* in blocks */ | |
1627 | atomic_t s_bal_ex_scanned; /* total extents scanned */ | |
a6c75eaf | 1628 | atomic_t s_bal_groups_scanned; /* number of groups scanned */ |
ca0faba0 TT |
1629 | atomic_t s_bal_goals; /* goal hits */ |
1630 | atomic_t s_bal_breaks; /* too long searches */ | |
1631 | atomic_t s_bal_2orders; /* 2^order hits */ | |
196e402a HS |
1632 | atomic_t s_bal_cr0_bad_suggestions; |
1633 | atomic_t s_bal_cr1_bad_suggestions; | |
a6c75eaf HS |
1634 | atomic64_t s_bal_cX_groups_considered[4]; |
1635 | atomic64_t s_bal_cX_hits[4]; | |
1636 | atomic64_t s_bal_cX_failed[4]; /* cX loop didn't find blocks */ | |
67d25186 HS |
1637 | atomic_t s_mb_buddies_generated; /* number of buddies generated */ |
1638 | atomic64_t s_mb_generation_time; | |
ca0faba0 TT |
1639 | atomic_t s_mb_lost_chunks; |
1640 | atomic_t s_mb_preallocated; | |
1641 | atomic_t s_mb_discarded; | |
50797481 | 1642 | atomic_t s_lock_busy; |
ca0faba0 TT |
1643 | |
1644 | /* locality groups */ | |
003cb608 | 1645 | struct ext4_locality_group __percpu *s_locality_groups; |
ca0faba0 TT |
1646 | |
1647 | /* for write statistics */ | |
1648 | unsigned long s_sectors_written_start; | |
1649 | u64 s_kbytes_written; | |
1650 | ||
67a5da56 ZL |
1651 | /* the size of zero-out chunk */ |
1652 | unsigned int s_extent_max_zeroout_kb; | |
1653 | ||
ca0faba0 | 1654 | unsigned int s_log_groups_per_flex; |
7c990728 | 1655 | struct flex_groups * __rcu *s_flex_groups; |
117fff10 | 1656 | ext4_group_t s_flex_groups_allocated; |
4c0425ff | 1657 | |
2e8fa54e JK |
1658 | /* workqueue for reserved extent conversions (buffered io) */ |
1659 | struct workqueue_struct *rsv_conversion_wq; | |
66e61a9e TT |
1660 | |
1661 | /* timer for periodic error stats printing */ | |
1662 | struct timer_list s_err_report; | |
bfff6873 LC |
1663 | |
1664 | /* Lazy inode table initialization info */ | |
1665 | struct ext4_li_request *s_li_request; | |
1666 | /* Wait multiplier for lazy initialization thread */ | |
1667 | unsigned int s_li_wait_mult; | |
c5e06d10 JL |
1668 | |
1669 | /* Kernel thread for multiple mount protection */ | |
1670 | struct task_struct *s_mmp_tsk; | |
3d56b8d2 TM |
1671 | |
1672 | /* record the last minlen when FITRIM is called. */ | |
2327fb2e | 1673 | unsigned long s_last_trim_minblks; |
0441984a DW |
1674 | |
1675 | /* Reference to checksum algorithm driver via cryptoapi */ | |
1676 | struct crypto_shash *s_chksum_driver; | |
a9c47317 DW |
1677 | |
1678 | /* Precomputed FS UUID checksum for seeding other checksums */ | |
1679 | __u32 s_csum_seed; | |
74cd15cd ZL |
1680 | |
1681 | /* Reclaim extents from extent status tree */ | |
1682 | struct shrinker s_es_shrinker; | |
dd475925 | 1683 | struct list_head s_es_list; /* List of inodes with reclaimable extents */ |
edaa53ca | 1684 | long s_es_nr_inode; |
eb68d0e2 | 1685 | struct ext4_es_stats s_es_stats; |
47387409 | 1686 | struct mb_cache *s_ea_block_cache; |
dec214d0 | 1687 | struct mb_cache *s_ea_inode_cache; |
edaa53ca | 1688 | spinlock_t s_es_lock ____cacheline_aligned_in_smp; |
efbed4dc | 1689 | |
188c299e JK |
1690 | /* Journal triggers for checksum computation */ |
1691 | struct ext4_journal_trigger s_journal_triggers[EXT4_JOURNAL_TRIGGER_COUNT]; | |
1692 | ||
efbed4dc TT |
1693 | /* Ratelimit ext4 messages. */ |
1694 | struct ratelimit_state s_err_ratelimit_state; | |
1695 | struct ratelimit_state s_warning_ratelimit_state; | |
1696 | struct ratelimit_state s_msg_ratelimit_state; | |
1cf006ed DM |
1697 | atomic_t s_warning_count; |
1698 | atomic_t s_msg_count; | |
c8585c6f | 1699 | |
ac4acb1f EB |
1700 | /* Encryption policy for '-o test_dummy_encryption' */ |
1701 | struct fscrypt_dummy_policy s_dummy_enc_policy; | |
ed318a6c | 1702 | |
cb85f4d2 EB |
1703 | /* |
1704 | * Barrier between writepages ops and changing any inode's JOURNAL_DATA | |
1705 | * or EXTENTS flag. | |
1706 | */ | |
bbd55937 | 1707 | struct percpu_rw_semaphore s_writepages_rwsem; |
5e405595 | 1708 | struct dax_device *s_daxdev; |
cd913c76 | 1709 | u64 s_dax_part_off; |
46f870d6 TT |
1710 | #ifdef CONFIG_EXT4_DEBUG |
1711 | unsigned long s_simulate_fail; | |
1712 | #endif | |
bc71726c | 1713 | /* Record the errseq of the backing block device */ |
1714 | errseq_t s_bdev_wb_err; | |
1715 | spinlock_t s_bdev_wb_lock; | |
aa75f4d3 | 1716 | |
c92dc856 JK |
1717 | /* Information about errors that happened during this mount */ |
1718 | spinlock_t s_error_lock; | |
1719 | int s_add_error_count; | |
1720 | int s_first_error_code; | |
1721 | __u32 s_first_error_line; | |
1722 | __u32 s_first_error_ino; | |
1723 | __u64 s_first_error_block; | |
1724 | const char *s_first_error_func; | |
1725 | time64_t s_first_error_time; | |
1726 | int s_last_error_code; | |
1727 | __u32 s_last_error_line; | |
1728 | __u32 s_last_error_ino; | |
1729 | __u64 s_last_error_block; | |
1730 | const char *s_last_error_func; | |
1731 | time64_t s_last_error_time; | |
1732 | /* | |
1733 | * If we are in a context where we cannot update error information in | |
1734 | * the on-disk superblock, we queue this work to do it. | |
1735 | */ | |
1736 | struct work_struct s_error_work; | |
1737 | ||
7bbbe241 | 1738 | /* Ext4 fast commit sub transaction ID */ |
aa75f4d3 | 1739 | atomic_t s_fc_subtid; |
7bbbe241 | 1740 | |
aa75f4d3 HS |
1741 | /* |
1742 | * After commit starts, the main queue gets locked, and the further | |
1743 | * updates get added in the staging queue. | |
1744 | */ | |
1745 | #define FC_Q_MAIN 0 | |
1746 | #define FC_Q_STAGING 1 | |
1747 | struct list_head s_fc_q[2]; /* Inodes staged for fast commit | |
1748 | * that have data changes in them. | |
1749 | */ | |
1750 | struct list_head s_fc_dentry_q[2]; /* directory entry updates */ | |
1751 | unsigned int s_fc_bytes; | |
1752 | /* | |
1753 | * Main fast commit lock. This lock protects accesses to the | |
1754 | * following fields: | |
1755 | * ei->i_fc_list, s_fc_dentry_q, s_fc_q, s_fc_bytes, s_fc_bh. | |
1756 | */ | |
1757 | spinlock_t s_fc_lock; | |
1758 | struct buffer_head *s_fc_bh; | |
1759 | struct ext4_fc_stats s_fc_stats; | |
e85c81ba | 1760 | tid_t s_fc_ineligible_tid; |
8016e29f HS |
1761 | #ifdef CONFIG_EXT4_DEBUG |
1762 | int s_fc_debug_max_replay; | |
1763 | #endif | |
1764 | struct ext4_fc_replay_state s_fc_replay_state; | |
ca0faba0 TT |
1765 | }; |
1766 | ||
af5bc92d | 1767 | static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) |
ac27a0ec DK |
1768 | { |
1769 | return sb->s_fs_info; | |
1770 | } | |
617ba13b | 1771 | static inline struct ext4_inode_info *EXT4_I(struct inode *inode) |
ac27a0ec | 1772 | { |
617ba13b | 1773 | return container_of(inode, struct ext4_inode_info, vfs_inode); |
ac27a0ec DK |
1774 | } |
1775 | ||
617ba13b | 1776 | static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) |
ac27a0ec | 1777 | { |
617ba13b | 1778 | return ino == EXT4_ROOT_INO || |
617ba13b MC |
1779 | (ino >= EXT4_FIRST_INO(sb) && |
1780 | ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)); | |
ac27a0ec | 1781 | } |
19f5fb7a | 1782 | |
1d0c3924 TT |
1783 | /* |
1784 | * Returns: sbi->field[index] | |
1785 | * Used to access an array element from the following sbi fields which require | |
1786 | * rcu protection to avoid dereferencing an invalid pointer due to reassignment | |
1787 | * - s_group_desc | |
1788 | * - s_group_info | |
1789 | * - s_flex_group | |
1790 | */ | |
1791 | #define sbi_array_rcu_deref(sbi, field, index) \ | |
1792 | ({ \ | |
1793 | typeof(*((sbi)->field)) _v; \ | |
1794 | rcu_read_lock(); \ | |
1795 | _v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index]; \ | |
1796 | rcu_read_unlock(); \ | |
1797 | _v; \ | |
1798 | }) | |
1799 | ||
9b5f6c9b HS |
1800 | /* |
1801 | * run-time mount flags | |
1802 | */ | |
1803 | enum { | |
1804 | EXT4_MF_MNTDIR_SAMPLED, | |
1805 | EXT4_MF_FS_ABORTED, /* Fatal error detected */ | |
bdc8a53a | 1806 | EXT4_MF_FC_INELIGIBLE /* Fast commit ineligible */ |
9b5f6c9b HS |
1807 | }; |
1808 | ||
1809 | static inline void ext4_set_mount_flag(struct super_block *sb, int bit) | |
1810 | { | |
1811 | set_bit(bit, &EXT4_SB(sb)->s_mount_flags); | |
1812 | } | |
1813 | ||
1814 | static inline void ext4_clear_mount_flag(struct super_block *sb, int bit) | |
1815 | { | |
1816 | clear_bit(bit, &EXT4_SB(sb)->s_mount_flags); | |
1817 | } | |
1818 | ||
1819 | static inline int ext4_test_mount_flag(struct super_block *sb, int bit) | |
1820 | { | |
1821 | return test_bit(bit, &EXT4_SB(sb)->s_mount_flags); | |
1822 | } | |
1823 | ||
1824 | ||
46f870d6 TT |
1825 | /* |
1826 | * Simulate_fail codes | |
1827 | */ | |
1828 | #define EXT4_SIM_BBITMAP_EIO 1 | |
1829 | #define EXT4_SIM_BBITMAP_CRC 2 | |
1830 | #define EXT4_SIM_IBITMAP_EIO 3 | |
1831 | #define EXT4_SIM_IBITMAP_CRC 4 | |
1832 | #define EXT4_SIM_INODE_EIO 5 | |
1833 | #define EXT4_SIM_INODE_CRC 6 | |
1834 | #define EXT4_SIM_DIRBLOCK_EIO 7 | |
1835 | #define EXT4_SIM_DIRBLOCK_CRC 8 | |
1836 | ||
1837 | static inline bool ext4_simulate_fail(struct super_block *sb, | |
1838 | unsigned long code) | |
1839 | { | |
1840 | #ifdef CONFIG_EXT4_DEBUG | |
1841 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1842 | ||
1843 | if (unlikely(sbi->s_simulate_fail == code)) { | |
1844 | sbi->s_simulate_fail = 0; | |
1845 | return true; | |
1846 | } | |
1847 | #endif | |
1848 | return false; | |
1849 | } | |
1850 | ||
1851 | static inline void ext4_simulate_fail_bh(struct super_block *sb, | |
1852 | struct buffer_head *bh, | |
1853 | unsigned long code) | |
1854 | { | |
1855 | if (!IS_ERR(bh) && ext4_simulate_fail(sb, code)) | |
1856 | clear_buffer_uptodate(bh); | |
1857 | } | |
1858 | ||
878520ac TT |
1859 | /* |
1860 | * Error number codes for s_{first,last}_error_errno | |
1861 | * | |
1862 | * Linux errno numbers are architecture specific, so we need to translate | |
1863 | * them into something which is architecture independent. We don't define | |
1864 | * codes for all errno's; just the ones which are most likely to be the cause | |
1865 | * of an ext4_error() call. | |
1866 | */ | |
1867 | #define EXT4_ERR_UNKNOWN 1 | |
1868 | #define EXT4_ERR_EIO 2 | |
1869 | #define EXT4_ERR_ENOMEM 3 | |
1870 | #define EXT4_ERR_EFSBADCRC 4 | |
1871 | #define EXT4_ERR_EFSCORRUPTED 5 | |
1872 | #define EXT4_ERR_ENOSPC 6 | |
1873 | #define EXT4_ERR_ENOKEY 7 | |
1874 | #define EXT4_ERR_EROFS 8 | |
1875 | #define EXT4_ERR_EFBIG 9 | |
1876 | #define EXT4_ERR_EEXIST 10 | |
1877 | #define EXT4_ERR_ERANGE 11 | |
1878 | #define EXT4_ERR_EOVERFLOW 12 | |
1879 | #define EXT4_ERR_EBUSY 13 | |
1880 | #define EXT4_ERR_ENOTDIR 14 | |
1881 | #define EXT4_ERR_ENOTEMPTY 15 | |
1882 | #define EXT4_ERR_ESHUTDOWN 16 | |
1883 | #define EXT4_ERR_EFAULT 17 | |
1884 | ||
19f5fb7a TT |
1885 | /* |
1886 | * Inode dynamic state flags | |
1887 | */ | |
1888 | enum { | |
1889 | EXT4_STATE_JDATA, /* journaled data exists */ | |
1890 | EXT4_STATE_NEW, /* inode is newly created */ | |
1891 | EXT4_STATE_XATTR, /* has in-inode xattrs */ | |
1892 | EXT4_STATE_NO_EXPAND, /* No space for expansion */ | |
1893 | EXT4_STATE_DA_ALLOC_CLOSE, /* Alloc DA blks on close */ | |
1894 | EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ | |
14ece102 | 1895 | EXT4_STATE_NEWENTRY, /* File just added to dir */ |
67cf5b09 | 1896 | EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ |
7869a4a6 | 1897 | EXT4_STATE_EXT_PRECACHED, /* extents have been precached */ |
a6d05676 | 1898 | EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */ |
c93d8f88 | 1899 | EXT4_STATE_VERITY_IN_PROGRESS, /* building fs-verity Merkle tree */ |
aa75f4d3 | 1900 | EXT4_STATE_FC_COMMITTING, /* Fast commit ongoing */ |
02f310fc | 1901 | EXT4_STATE_ORPHAN_FILE, /* Inode orphaned in orphan file */ |
19f5fb7a TT |
1902 | }; |
1903 | ||
353eb83c | 1904 | #define EXT4_INODE_BIT_FNS(name, field, offset) \ |
12e9b892 DM |
1905 | static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ |
1906 | { \ | |
353eb83c | 1907 | return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ |
12e9b892 DM |
1908 | } \ |
1909 | static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ | |
1910 | { \ | |
353eb83c | 1911 | set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ |
12e9b892 DM |
1912 | } \ |
1913 | static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ | |
1914 | { \ | |
353eb83c | 1915 | clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ |
19f5fb7a TT |
1916 | } |
1917 | ||
3f61c0cc AD |
1918 | /* Add these declarations here only so that these functions can be |
1919 | * found by name. Otherwise, they are very hard to locate. */ | |
1920 | static inline int ext4_test_inode_flag(struct inode *inode, int bit); | |
1921 | static inline void ext4_set_inode_flag(struct inode *inode, int bit); | |
1922 | static inline void ext4_clear_inode_flag(struct inode *inode, int bit); | |
353eb83c | 1923 | EXT4_INODE_BIT_FNS(flag, flags, 0) |
3f61c0cc AD |
1924 | |
1925 | /* Add these declarations here only so that these functions can be | |
1926 | * found by name. Otherwise, they are very hard to locate. */ | |
1927 | static inline int ext4_test_inode_state(struct inode *inode, int bit); | |
1928 | static inline void ext4_set_inode_state(struct inode *inode, int bit); | |
1929 | static inline void ext4_clear_inode_state(struct inode *inode, int bit); | |
353eb83c TT |
1930 | #if (BITS_PER_LONG < 64) |
1931 | EXT4_INODE_BIT_FNS(state, state_flags, 0) | |
1932 | ||
1933 | static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) | |
1934 | { | |
1935 | (ei)->i_state_flags = 0; | |
1936 | } | |
1937 | #else | |
1938 | EXT4_INODE_BIT_FNS(state, flags, 32) | |
1939 | ||
1940 | static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) | |
1941 | { | |
1942 | /* We depend on the fact that callers will set i_flags */ | |
1943 | } | |
1944 | #endif | |
ac27a0ec | 1945 | #else |
617ba13b | 1946 | /* Assume that user mode programs are passing in an ext4fs superblock, not |
ac27a0ec DK |
1947 | * a kernel struct super_block. This will allow us to call the feature-test |
1948 | * macros from user land. */ | |
617ba13b | 1949 | #define EXT4_SB(sb) (sb) |
ac27a0ec DK |
1950 | #endif |
1951 | ||
c93d8f88 EB |
1952 | static inline bool ext4_verity_in_progress(struct inode *inode) |
1953 | { | |
1954 | return IS_ENABLED(CONFIG_FS_VERITY) && | |
1955 | ext4_test_inode_state(inode, EXT4_STATE_VERITY_IN_PROGRESS); | |
1956 | } | |
1957 | ||
617ba13b | 1958 | #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime |
ac27a0ec DK |
1959 | |
1960 | /* | |
1961 | * Codes for operating systems | |
1962 | */ | |
617ba13b MC |
1963 | #define EXT4_OS_LINUX 0 |
1964 | #define EXT4_OS_HURD 1 | |
1965 | #define EXT4_OS_MASIX 2 | |
1966 | #define EXT4_OS_FREEBSD 3 | |
1967 | #define EXT4_OS_LITES 4 | |
ac27a0ec DK |
1968 | |
1969 | /* | |
1970 | * Revision levels | |
1971 | */ | |
617ba13b MC |
1972 | #define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */ |
1973 | #define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ | |
ac27a0ec | 1974 | |
617ba13b | 1975 | #define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV |
ac27a0ec | 1976 | |
617ba13b | 1977 | #define EXT4_GOOD_OLD_INODE_SIZE 128 |
ac27a0ec | 1978 | |
4881c497 DD |
1979 | #define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN) |
1980 | #define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX | |
1981 | #define EXT4_TIMESTAMP_MIN S32_MIN | |
1982 | ||
ac27a0ec DK |
1983 | /* |
1984 | * Feature set definitions | |
1985 | */ | |
1986 | ||
617ba13b MC |
1987 | #define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
1988 | #define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002 | |
1989 | #define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 | |
1990 | #define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008 | |
1991 | #define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010 | |
1992 | #define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020 | |
1beeef1b | 1993 | #define EXT4_FEATURE_COMPAT_SPARSE_SUPER2 0x0200 |
a44ad683 HS |
1994 | /* |
1995 | * The reason why "FAST_COMMIT" is a compat feature is that, FS becomes | |
1996 | * incompatible only if fast commit blocks are present in the FS. Since we | |
1997 | * clear the journal (and thus the fast commit blocks), we don't mark FS as | |
1998 | * incompatible. We also have a JBD2 incompat feature, which gets set when | |
1999 | * there are fast commit blocks present in the journal. | |
2000 | */ | |
995a3ed6 | 2001 | #define EXT4_FEATURE_COMPAT_FAST_COMMIT 0x0400 |
b925acb8 | 2002 | #define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800 |
02f310fc | 2003 | #define EXT4_FEATURE_COMPAT_ORPHAN_FILE 0x1000 /* Orphan file exists */ |
617ba13b MC |
2004 | |
2005 | #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 | |
2006 | #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 | |
2007 | #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 | |
0fc1b451 | 2008 | #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 |
717d50e4 | 2009 | #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 |
f8628a14 | 2010 | #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 |
ef7f3835 | 2011 | #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040 |
ae812306 | 2012 | #define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100 |
281b5995 | 2013 | #define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200 |
e6153918 DW |
2014 | /* |
2015 | * METADATA_CSUM also enables group descriptor checksums (GDT_CSUM). When | |
2016 | * METADATA_CSUM is set, group descriptor checksums use the same algorithm as | |
2017 | * all other data structures' checksums. However, the METADATA_CSUM and | |
2018 | * GDT_CSUM bits are mutually exclusive. | |
2019 | */ | |
9b90e5e0 | 2020 | #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 |
2cb5cc8b | 2021 | #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 |
8b4953e1 | 2022 | #define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 |
c93d8f88 | 2023 | #define EXT4_FEATURE_RO_COMPAT_VERITY 0x8000 |
02f310fc JK |
2024 | #define EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT 0x10000 /* Orphan file may be |
2025 | non-empty */ | |
617ba13b MC |
2026 | |
2027 | #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 | |
2028 | #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 | |
2029 | #define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ | |
2030 | #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ | |
2031 | #define EXT4_FEATURE_INCOMPAT_META_BG 0x0010 | |
a86c6181 | 2032 | #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */ |
bd81d8ee | 2033 | #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 |
0fc1b451 | 2034 | #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 |
ce421581 | 2035 | #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 |
f710b4b9 TT |
2036 | #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ |
2037 | #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ | |
8c81bd8f | 2038 | #define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 |
9b90e5e0 | 2039 | #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ |
67cf5b09 | 2040 | #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ |
3edc18d8 | 2041 | #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 |
c83ad55e | 2042 | #define EXT4_FEATURE_INCOMPAT_CASEFOLD 0x20000 |
617ba13b | 2043 | |
c9e716eb AD |
2044 | extern void ext4_update_dynamic_rev(struct super_block *sb); |
2045 | ||
e2b911c5 DW |
2046 | #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ |
2047 | static inline bool ext4_has_feature_##name(struct super_block *sb) \ | |
2048 | { \ | |
2049 | return ((EXT4_SB(sb)->s_es->s_feature_compat & \ | |
2050 | cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname)) != 0); \ | |
2051 | } \ | |
2052 | static inline void ext4_set_feature_##name(struct super_block *sb) \ | |
2053 | { \ | |
c9e716eb | 2054 | ext4_update_dynamic_rev(sb); \ |
e2b911c5 DW |
2055 | EXT4_SB(sb)->s_es->s_feature_compat |= \ |
2056 | cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ | |
2057 | } \ | |
2058 | static inline void ext4_clear_feature_##name(struct super_block *sb) \ | |
2059 | { \ | |
2060 | EXT4_SB(sb)->s_es->s_feature_compat &= \ | |
2061 | ~cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ | |
2062 | } | |
2063 | ||
2064 | #define EXT4_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ | |
2065 | static inline bool ext4_has_feature_##name(struct super_block *sb) \ | |
2066 | { \ | |
2067 | return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ | |
2068 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname)) != 0); \ | |
2069 | } \ | |
2070 | static inline void ext4_set_feature_##name(struct super_block *sb) \ | |
2071 | { \ | |
c9e716eb | 2072 | ext4_update_dynamic_rev(sb); \ |
e2b911c5 DW |
2073 | EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ |
2074 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ | |
2075 | } \ | |
2076 | static inline void ext4_clear_feature_##name(struct super_block *sb) \ | |
2077 | { \ | |
2078 | EXT4_SB(sb)->s_es->s_feature_ro_compat &= \ | |
2079 | ~cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ | |
2080 | } | |
2081 | ||
2082 | #define EXT4_FEATURE_INCOMPAT_FUNCS(name, flagname) \ | |
2083 | static inline bool ext4_has_feature_##name(struct super_block *sb) \ | |
2084 | { \ | |
2085 | return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ | |
2086 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname)) != 0); \ | |
2087 | } \ | |
2088 | static inline void ext4_set_feature_##name(struct super_block *sb) \ | |
2089 | { \ | |
c9e716eb | 2090 | ext4_update_dynamic_rev(sb); \ |
e2b911c5 DW |
2091 | EXT4_SB(sb)->s_es->s_feature_incompat |= \ |
2092 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ | |
2093 | } \ | |
2094 | static inline void ext4_clear_feature_##name(struct super_block *sb) \ | |
2095 | { \ | |
2096 | EXT4_SB(sb)->s_es->s_feature_incompat &= \ | |
2097 | ~cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ | |
2098 | } | |
2099 | ||
2100 | EXT4_FEATURE_COMPAT_FUNCS(dir_prealloc, DIR_PREALLOC) | |
2101 | EXT4_FEATURE_COMPAT_FUNCS(imagic_inodes, IMAGIC_INODES) | |
2102 | EXT4_FEATURE_COMPAT_FUNCS(journal, HAS_JOURNAL) | |
2103 | EXT4_FEATURE_COMPAT_FUNCS(xattr, EXT_ATTR) | |
2104 | EXT4_FEATURE_COMPAT_FUNCS(resize_inode, RESIZE_INODE) | |
2105 | EXT4_FEATURE_COMPAT_FUNCS(dir_index, DIR_INDEX) | |
2106 | EXT4_FEATURE_COMPAT_FUNCS(sparse_super2, SPARSE_SUPER2) | |
995a3ed6 | 2107 | EXT4_FEATURE_COMPAT_FUNCS(fast_commit, FAST_COMMIT) |
b925acb8 | 2108 | EXT4_FEATURE_COMPAT_FUNCS(stable_inodes, STABLE_INODES) |
02f310fc | 2109 | EXT4_FEATURE_COMPAT_FUNCS(orphan_file, ORPHAN_FILE) |
e2b911c5 DW |
2110 | |
2111 | EXT4_FEATURE_RO_COMPAT_FUNCS(sparse_super, SPARSE_SUPER) | |
2112 | EXT4_FEATURE_RO_COMPAT_FUNCS(large_file, LARGE_FILE) | |
2113 | EXT4_FEATURE_RO_COMPAT_FUNCS(btree_dir, BTREE_DIR) | |
2114 | EXT4_FEATURE_RO_COMPAT_FUNCS(huge_file, HUGE_FILE) | |
2115 | EXT4_FEATURE_RO_COMPAT_FUNCS(gdt_csum, GDT_CSUM) | |
2116 | EXT4_FEATURE_RO_COMPAT_FUNCS(dir_nlink, DIR_NLINK) | |
2117 | EXT4_FEATURE_RO_COMPAT_FUNCS(extra_isize, EXTRA_ISIZE) | |
2118 | EXT4_FEATURE_RO_COMPAT_FUNCS(quota, QUOTA) | |
2119 | EXT4_FEATURE_RO_COMPAT_FUNCS(bigalloc, BIGALLOC) | |
2120 | EXT4_FEATURE_RO_COMPAT_FUNCS(metadata_csum, METADATA_CSUM) | |
2121 | EXT4_FEATURE_RO_COMPAT_FUNCS(readonly, READONLY) | |
2122 | EXT4_FEATURE_RO_COMPAT_FUNCS(project, PROJECT) | |
c93d8f88 | 2123 | EXT4_FEATURE_RO_COMPAT_FUNCS(verity, VERITY) |
02f310fc | 2124 | EXT4_FEATURE_RO_COMPAT_FUNCS(orphan_present, ORPHAN_PRESENT) |
e2b911c5 DW |
2125 | |
2126 | EXT4_FEATURE_INCOMPAT_FUNCS(compression, COMPRESSION) | |
2127 | EXT4_FEATURE_INCOMPAT_FUNCS(filetype, FILETYPE) | |
2128 | EXT4_FEATURE_INCOMPAT_FUNCS(journal_needs_recovery, RECOVER) | |
2129 | EXT4_FEATURE_INCOMPAT_FUNCS(journal_dev, JOURNAL_DEV) | |
2130 | EXT4_FEATURE_INCOMPAT_FUNCS(meta_bg, META_BG) | |
2131 | EXT4_FEATURE_INCOMPAT_FUNCS(extents, EXTENTS) | |
2132 | EXT4_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) | |
2133 | EXT4_FEATURE_INCOMPAT_FUNCS(mmp, MMP) | |
2134 | EXT4_FEATURE_INCOMPAT_FUNCS(flex_bg, FLEX_BG) | |
2135 | EXT4_FEATURE_INCOMPAT_FUNCS(ea_inode, EA_INODE) | |
2136 | EXT4_FEATURE_INCOMPAT_FUNCS(dirdata, DIRDATA) | |
2137 | EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed, CSUM_SEED) | |
2138 | EXT4_FEATURE_INCOMPAT_FUNCS(largedir, LARGEDIR) | |
2139 | EXT4_FEATURE_INCOMPAT_FUNCS(inline_data, INLINE_DATA) | |
2140 | EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT) | |
c83ad55e | 2141 | EXT4_FEATURE_INCOMPAT_FUNCS(casefold, CASEFOLD) |
e2b911c5 | 2142 | |
2035e776 TT |
2143 | #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR |
2144 | #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ | |
2145 | EXT4_FEATURE_INCOMPAT_META_BG) | |
2146 | #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ | |
2147 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
2148 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR) | |
2149 | ||
2150 | #define EXT3_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR | |
2151 | #define EXT3_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ | |
2152 | EXT4_FEATURE_INCOMPAT_RECOVER| \ | |
2153 | EXT4_FEATURE_INCOMPAT_META_BG) | |
2154 | #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ | |
2155 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
2156 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR) | |
2157 | ||
02f310fc JK |
2158 | #define EXT4_FEATURE_COMPAT_SUPP (EXT4_FEATURE_COMPAT_EXT_ATTR| \ |
2159 | EXT4_FEATURE_COMPAT_ORPHAN_FILE) | |
617ba13b MC |
2160 | #define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ |
2161 | EXT4_FEATURE_INCOMPAT_RECOVER| \ | |
a86c6181 | 2162 | EXT4_FEATURE_INCOMPAT_META_BG| \ |
bd81d8ee | 2163 | EXT4_FEATURE_INCOMPAT_EXTENTS| \ |
ce421581 | 2164 | EXT4_FEATURE_INCOMPAT_64BIT| \ |
c5e06d10 | 2165 | EXT4_FEATURE_INCOMPAT_FLEX_BG| \ |
e50e5129 | 2166 | EXT4_FEATURE_INCOMPAT_EA_INODE| \ |
6ddb2447 TT |
2167 | EXT4_FEATURE_INCOMPAT_MMP | \ |
2168 | EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ | |
8c81bd8f | 2169 | EXT4_FEATURE_INCOMPAT_ENCRYPT | \ |
c83ad55e | 2170 | EXT4_FEATURE_INCOMPAT_CASEFOLD | \ |
e08ac99f AB |
2171 | EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ |
2172 | EXT4_FEATURE_INCOMPAT_LARGEDIR) | |
617ba13b MC |
2173 | #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
2174 | EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ | |
717d50e4 | 2175 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ |
f8628a14 | 2176 | EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ |
ef7f3835 | 2177 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \ |
0fc1b451 | 2178 | EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\ |
6f16b606 | 2179 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\ |
e93376c2 | 2180 | EXT4_FEATURE_RO_COMPAT_BIGALLOC |\ |
7c319d32 | 2181 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ |
040cb378 | 2182 | EXT4_FEATURE_RO_COMPAT_QUOTA |\ |
c93d8f88 | 2183 | EXT4_FEATURE_RO_COMPAT_PROJECT |\ |
02f310fc JK |
2184 | EXT4_FEATURE_RO_COMPAT_VERITY |\ |
2185 | EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT) | |
ac27a0ec | 2186 | |
e2b911c5 DW |
2187 | #define EXTN_FEATURE_FUNCS(ver) \ |
2188 | static inline bool ext4_has_unknown_ext##ver##_compat_features(struct super_block *sb) \ | |
2189 | { \ | |
2190 | return ((EXT4_SB(sb)->s_es->s_feature_compat & \ | |
2191 | cpu_to_le32(~EXT##ver##_FEATURE_COMPAT_SUPP)) != 0); \ | |
2192 | } \ | |
2193 | static inline bool ext4_has_unknown_ext##ver##_ro_compat_features(struct super_block *sb) \ | |
2194 | { \ | |
2195 | return ((EXT4_SB(sb)->s_es->s_feature_ro_compat & \ | |
2196 | cpu_to_le32(~EXT##ver##_FEATURE_RO_COMPAT_SUPP)) != 0); \ | |
2197 | } \ | |
2198 | static inline bool ext4_has_unknown_ext##ver##_incompat_features(struct super_block *sb) \ | |
2199 | { \ | |
2200 | return ((EXT4_SB(sb)->s_es->s_feature_incompat & \ | |
2201 | cpu_to_le32(~EXT##ver##_FEATURE_INCOMPAT_SUPP)) != 0); \ | |
2202 | } | |
2203 | ||
2204 | EXTN_FEATURE_FUNCS(2) | |
2205 | EXTN_FEATURE_FUNCS(3) | |
2206 | EXTN_FEATURE_FUNCS(4) | |
2207 | ||
2208 | static inline bool ext4_has_compat_features(struct super_block *sb) | |
2209 | { | |
2210 | return (EXT4_SB(sb)->s_es->s_feature_compat != 0); | |
2211 | } | |
2212 | static inline bool ext4_has_ro_compat_features(struct super_block *sb) | |
2213 | { | |
2214 | return (EXT4_SB(sb)->s_es->s_feature_ro_compat != 0); | |
2215 | } | |
2216 | static inline bool ext4_has_incompat_features(struct super_block *sb) | |
2217 | { | |
2218 | return (EXT4_SB(sb)->s_es->s_feature_incompat != 0); | |
2219 | } | |
2220 | ||
25c6d98f JK |
2221 | extern int ext4_feature_set_ok(struct super_block *sb, int readonly); |
2222 | ||
9549a168 TT |
2223 | /* |
2224 | * Superblock flags | |
2225 | */ | |
2226 | #define EXT4_FLAGS_RESIZING 0 | |
0db1ff22 | 2227 | #define EXT4_FLAGS_SHUTDOWN 1 |
a8ab6d38 | 2228 | #define EXT4_FLAGS_BDEV_IS_DAX 2 |
0db1ff22 TT |
2229 | |
2230 | static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi) | |
2231 | { | |
2232 | return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); | |
2233 | } | |
9549a168 | 2234 | |
ac27a0ec DK |
2235 | /* |
2236 | * Default values for user and/or group using reserved blocks | |
2237 | */ | |
617ba13b MC |
2238 | #define EXT4_DEF_RESUID 0 |
2239 | #define EXT4_DEF_RESGID 0 | |
ac27a0ec | 2240 | |
040cb378 LX |
2241 | /* |
2242 | * Default project ID | |
2243 | */ | |
2244 | #define EXT4_DEF_PROJID 0 | |
2245 | ||
240799cd TT |
2246 | #define EXT4_DEF_INODE_READAHEAD_BLKS 32 |
2247 | ||
ac27a0ec DK |
2248 | /* |
2249 | * Default mount options | |
2250 | */ | |
617ba13b MC |
2251 | #define EXT4_DEFM_DEBUG 0x0001 |
2252 | #define EXT4_DEFM_BSDGROUPS 0x0002 | |
2253 | #define EXT4_DEFM_XATTR_USER 0x0004 | |
2254 | #define EXT4_DEFM_ACL 0x0008 | |
2255 | #define EXT4_DEFM_UID16 0x0010 | |
2256 | #define EXT4_DEFM_JMODE 0x0060 | |
2257 | #define EXT4_DEFM_JMODE_DATA 0x0020 | |
2258 | #define EXT4_DEFM_JMODE_ORDERED 0x0040 | |
2259 | #define EXT4_DEFM_JMODE_WBACK 0x0060 | |
8b67f04a TT |
2260 | #define EXT4_DEFM_NOBARRIER 0x0100 |
2261 | #define EXT4_DEFM_BLOCK_VALIDITY 0x0200 | |
2262 | #define EXT4_DEFM_DISCARD 0x0400 | |
2263 | #define EXT4_DEFM_NODELALLOC 0x0800 | |
ac27a0ec | 2264 | |
30773840 TT |
2265 | /* |
2266 | * Default journal batch times | |
2267 | */ | |
2268 | #define EXT4_DEF_MIN_BATCH_TIME 0 | |
2269 | #define EXT4_DEF_MAX_BATCH_TIME 15000 /* 15ms */ | |
2270 | ||
a4912123 TT |
2271 | /* |
2272 | * Minimum number of groups in a flexgroup before we separate out | |
2273 | * directories into the first block group of a flexgroup | |
2274 | */ | |
2275 | #define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4 | |
2276 | ||
ac27a0ec DK |
2277 | /* |
2278 | * Structure of a directory entry | |
2279 | */ | |
617ba13b | 2280 | #define EXT4_NAME_LEN 255 |
c186f088 YB |
2281 | /* |
2282 | * Base length of the ext4 directory entry excluding the name length | |
2283 | */ | |
2284 | #define EXT4_BASE_DIR_LEN (sizeof(struct ext4_dir_entry_2) - EXT4_NAME_LEN) | |
ac27a0ec | 2285 | |
617ba13b | 2286 | struct ext4_dir_entry { |
ac27a0ec DK |
2287 | __le32 inode; /* Inode number */ |
2288 | __le16 rec_len; /* Directory entry length */ | |
2289 | __le16 name_len; /* Name length */ | |
617ba13b | 2290 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
2291 | }; |
2292 | ||
471fbbea DR |
2293 | |
2294 | /* | |
2295 | * Encrypted Casefolded entries require saving the hash on disk. This structure | |
2296 | * followed ext4_dir_entry_2's name[name_len] at the next 4 byte aligned | |
2297 | * boundary. | |
2298 | */ | |
2299 | struct ext4_dir_entry_hash { | |
2300 | __le32 hash; | |
2301 | __le32 minor_hash; | |
2302 | }; | |
2303 | ||
ac27a0ec | 2304 | /* |
617ba13b | 2305 | * The new version of the directory entry. Since EXT4 structures are |
ac27a0ec DK |
2306 | * stored in intel byte order, and the name_len field could never be |
2307 | * bigger than 255 chars, it's safe to reclaim the extra byte for the | |
2308 | * file_type field. | |
2309 | */ | |
617ba13b | 2310 | struct ext4_dir_entry_2 { |
ac27a0ec DK |
2311 | __le32 inode; /* Inode number */ |
2312 | __le16 rec_len; /* Directory entry length */ | |
2313 | __u8 name_len; /* Name length */ | |
9f364e1d | 2314 | __u8 file_type; /* See file type macros EXT4_FT_* below */ |
617ba13b | 2315 | char name[EXT4_NAME_LEN]; /* File name */ |
ac27a0ec DK |
2316 | }; |
2317 | ||
471fbbea DR |
2318 | /* |
2319 | * Access the hashes at the end of ext4_dir_entry_2 | |
2320 | */ | |
2321 | #define EXT4_DIRENT_HASHES(entry) \ | |
2322 | ((struct ext4_dir_entry_hash *) \ | |
2323 | (((void *)(entry)) + \ | |
2324 | ((8 + (entry)->name_len + EXT4_DIR_ROUND) & ~EXT4_DIR_ROUND))) | |
2325 | #define EXT4_DIRENT_HASH(entry) le32_to_cpu(EXT4_DIRENT_HASHES(de)->hash) | |
2326 | #define EXT4_DIRENT_MINOR_HASH(entry) \ | |
2327 | le32_to_cpu(EXT4_DIRENT_HASHES(de)->minor_hash) | |
2328 | ||
2329 | static inline bool ext4_hash_in_dirent(const struct inode *inode) | |
2330 | { | |
2331 | return IS_CASEFOLDED(inode) && IS_ENCRYPTED(inode); | |
2332 | } | |
2333 | ||
e6153918 DW |
2334 | /* |
2335 | * This is a bogus directory entry at the end of each leaf block that | |
2336 | * records checksums. | |
2337 | */ | |
2338 | struct ext4_dir_entry_tail { | |
2339 | __le32 det_reserved_zero1; /* Pretend to be unused */ | |
2340 | __le16 det_rec_len; /* 12 */ | |
2341 | __u8 det_reserved_zero2; /* Zero name length */ | |
2342 | __u8 det_reserved_ft; /* 0xDE, fake file type */ | |
2343 | __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ | |
2344 | }; | |
2345 | ||
3c47d541 TM |
2346 | #define EXT4_DIRENT_TAIL(block, blocksize) \ |
2347 | ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ | |
2348 | ((blocksize) - \ | |
2349 | sizeof(struct ext4_dir_entry_tail)))) | |
2350 | ||
ac27a0ec | 2351 | /* |
617ba13b | 2352 | * Ext4 directory file types. Only the low 3 bits are used. The |
ac27a0ec DK |
2353 | * other bits are reserved for now. |
2354 | */ | |
617ba13b MC |
2355 | #define EXT4_FT_UNKNOWN 0 |
2356 | #define EXT4_FT_REG_FILE 1 | |
2357 | #define EXT4_FT_DIR 2 | |
2358 | #define EXT4_FT_CHRDEV 3 | |
2359 | #define EXT4_FT_BLKDEV 4 | |
2360 | #define EXT4_FT_FIFO 5 | |
2361 | #define EXT4_FT_SOCK 6 | |
2362 | #define EXT4_FT_SYMLINK 7 | |
ac27a0ec | 2363 | |
617ba13b | 2364 | #define EXT4_FT_MAX 8 |
ac27a0ec | 2365 | |
e6153918 DW |
2366 | #define EXT4_FT_DIR_CSUM 0xDE |
2367 | ||
ac27a0ec | 2368 | /* |
617ba13b | 2369 | * EXT4_DIR_PAD defines the directory entries boundaries |
ac27a0ec DK |
2370 | * |
2371 | * NOTE: It must be a multiple of 4 | |
2372 | */ | |
617ba13b MC |
2373 | #define EXT4_DIR_PAD 4 |
2374 | #define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1) | |
a72d7f83 JK |
2375 | #define EXT4_MAX_REC_LEN ((1<<16)-1) |
2376 | ||
471fbbea DR |
2377 | /* |
2378 | * The rec_len is dependent on the type of directory. Directories that are | |
2379 | * casefolded and encrypted need to store the hash as well, so we add room for | |
2380 | * ext4_extended_dir_entry_2. For all entries related to '.' or '..' you should | |
2381 | * pass NULL for dir, as those entries do not use the extra fields. | |
2382 | */ | |
2383 | static inline unsigned int ext4_dir_rec_len(__u8 name_len, | |
2384 | const struct inode *dir) | |
2385 | { | |
2386 | int rec_len = (name_len + 8 + EXT4_DIR_ROUND); | |
2387 | ||
2388 | if (dir && ext4_hash_in_dirent(dir)) | |
2389 | rec_len += sizeof(struct ext4_dir_entry_hash); | |
2390 | return (rec_len & ~EXT4_DIR_ROUND); | |
2391 | } | |
2392 | ||
0cfc9255 ES |
2393 | /* |
2394 | * If we ever get support for fs block sizes > page_size, we'll need | |
2395 | * to remove the #if statements in the next two functions... | |
2396 | */ | |
2397 | static inline unsigned int | |
2398 | ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) | |
2399 | { | |
2400 | unsigned len = le16_to_cpu(dlen); | |
2401 | ||
ea1754a0 | 2402 | #if (PAGE_SIZE >= 65536) |
0cfc9255 ES |
2403 | if (len == EXT4_MAX_REC_LEN || len == 0) |
2404 | return blocksize; | |
2405 | return (len & 65532) | ((len & 3) << 16); | |
2406 | #else | |
2407 | return len; | |
2408 | #endif | |
2409 | } | |
2410 | ||
2411 | static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) | |
2412 | { | |
a2e3965d | 2413 | BUG_ON((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)); |
ea1754a0 | 2414 | #if (PAGE_SIZE >= 65536) |
0cfc9255 ES |
2415 | if (len < 65536) |
2416 | return cpu_to_le16(len); | |
2417 | if (len == blocksize) { | |
2418 | if (blocksize == 65536) | |
2419 | return cpu_to_le16(EXT4_MAX_REC_LEN); | |
2420 | else | |
2421 | return cpu_to_le16(0); | |
2422 | } | |
2423 | return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); | |
2424 | #else | |
2425 | return cpu_to_le16(len); | |
2426 | #endif | |
2427 | } | |
2428 | ||
ac27a0ec DK |
2429 | /* |
2430 | * Hash Tree Directory indexing | |
2431 | * (c) Daniel Phillips, 2001 | |
2432 | */ | |
2433 | ||
e2b911c5 | 2434 | #define is_dx(dir) (ext4_has_feature_dir_index((dir)->i_sb) && \ |
12e9b892 | 2435 | ext4_test_inode_flag((dir), EXT4_INODE_INDEX)) |
c7414892 AD |
2436 | #define EXT4_DIR_LINK_MAX(dir) unlikely((dir)->i_nlink >= EXT4_LINK_MAX && \ |
2437 | !(ext4_has_feature_dir_nlink((dir)->i_sb) && is_dx(dir))) | |
617ba13b | 2438 | #define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1) |
ac27a0ec DK |
2439 | |
2440 | /* Legal values for the dx_root hash_version field: */ | |
2441 | ||
e7093f0d PK |
2442 | #define DX_HASH_LEGACY 0 |
2443 | #define DX_HASH_HALF_MD4 1 | |
2444 | #define DX_HASH_TEA 2 | |
2445 | #define DX_HASH_LEGACY_UNSIGNED 3 | |
f99b2589 TT |
2446 | #define DX_HASH_HALF_MD4_UNSIGNED 4 |
2447 | #define DX_HASH_TEA_UNSIGNED 5 | |
471fbbea | 2448 | #define DX_HASH_SIPHASH 6 |
ac27a0ec | 2449 | |
0441984a DW |
2450 | static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc, |
2451 | const void *address, unsigned int length) | |
2452 | { | |
2453 | struct { | |
2454 | struct shash_desc shash; | |
3108b54b | 2455 | char ctx[4]; |
0441984a | 2456 | } desc; |
0441984a | 2457 | |
3108b54b TT |
2458 | BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx)); |
2459 | ||
0441984a | 2460 | desc.shash.tfm = sbi->s_chksum_driver; |
0441984a DW |
2461 | *(u32 *)desc.ctx = crc; |
2462 | ||
e7093f0d | 2463 | BUG_ON(crypto_shash_update(&desc.shash, address, length)); |
0441984a DW |
2464 | |
2465 | return *(u32 *)desc.ctx; | |
2466 | } | |
2467 | ||
ac27a0ec DK |
2468 | #ifdef __KERNEL__ |
2469 | ||
2470 | /* hash info structure used by the directory hash */ | |
2471 | struct dx_hash_info | |
2472 | { | |
2473 | u32 hash; | |
2474 | u32 minor_hash; | |
2475 | int hash_version; | |
2476 | u32 *seed; | |
2477 | }; | |
2478 | ||
d1f5273e FY |
2479 | |
2480 | /* 32 and 64 bit signed EOF for dx directories */ | |
2481 | #define EXT4_HTREE_EOF_32BIT ((1UL << (32 - 1)) - 1) | |
2482 | #define EXT4_HTREE_EOF_64BIT ((1ULL << (64 - 1)) - 1) | |
2483 | ||
ac27a0ec DK |
2484 | |
2485 | /* | |
617ba13b | 2486 | * Control parameters used by ext4_htree_next_block |
ac27a0ec DK |
2487 | */ |
2488 | #define HASH_NB_ALWAYS 1 | |
2489 | ||
5b643f9c TT |
2490 | struct ext4_filename { |
2491 | const struct qstr *usr_fname; | |
a7550b30 | 2492 | struct fscrypt_str disk_name; |
5b643f9c | 2493 | struct dx_hash_info hinfo; |
643fa961 | 2494 | #ifdef CONFIG_FS_ENCRYPTION |
a7550b30 | 2495 | struct fscrypt_str crypto_buf; |
5b643f9c | 2496 | #endif |
5298d4bf | 2497 | #if IS_ENABLED(CONFIG_UNICODE) |
3ae72562 GKB |
2498 | struct fscrypt_str cf_name; |
2499 | #endif | |
5b643f9c TT |
2500 | }; |
2501 | ||
2502 | #define fname_name(p) ((p)->disk_name.name) | |
471fbbea | 2503 | #define fname_usr_name(p) ((p)->usr_fname->name) |
5b643f9c | 2504 | #define fname_len(p) ((p)->disk_name.len) |
ac27a0ec DK |
2505 | |
2506 | /* | |
2507 | * Describe an inode's exact location on disk and in memory | |
2508 | */ | |
617ba13b | 2509 | struct ext4_iloc |
ac27a0ec DK |
2510 | { |
2511 | struct buffer_head *bh; | |
2512 | unsigned long offset; | |
fd2d4291 | 2513 | ext4_group_t block_group; |
ac27a0ec DK |
2514 | }; |
2515 | ||
617ba13b | 2516 | static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc) |
ac27a0ec | 2517 | { |
617ba13b | 2518 | return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset); |
ac27a0ec DK |
2519 | } |
2520 | ||
dec214d0 TE |
2521 | static inline bool ext4_is_quota_file(struct inode *inode) |
2522 | { | |
2523 | return IS_NOQUOTA(inode) && | |
2524 | !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL); | |
2525 | } | |
02749a4c | 2526 | |
ac27a0ec DK |
2527 | /* |
2528 | * This structure is stuffed into the struct file's private_data field | |
2529 | * for directories. It is where we put information so that we can do | |
2530 | * readdir operations in hash tree order. | |
2531 | */ | |
2532 | struct dir_private_info { | |
2533 | struct rb_root root; | |
2534 | struct rb_node *curr_node; | |
2535 | struct fname *extra_fname; | |
2536 | loff_t last_pos; | |
2537 | __u32 curr_hash; | |
2538 | __u32 curr_minor_hash; | |
2539 | __u32 next_hash; | |
2540 | }; | |
2541 | ||
2542 | /* calculate the first block number of the group */ | |
617ba13b | 2543 | static inline ext4_fsblk_t |
fd2d4291 | 2544 | ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no) |
ac27a0ec | 2545 | { |
617ba13b MC |
2546 | return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) + |
2547 | le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); | |
ac27a0ec DK |
2548 | } |
2549 | ||
2550 | /* | |
2551 | * Special error return code only used by dx_probe() and its callers. | |
2552 | */ | |
36de9286 | 2553 | #define ERR_BAD_DX_DIR (-(MAX_ERRNO - 1)) |
ac27a0ec | 2554 | |
e08ac99f AB |
2555 | /* htree levels for ext4 */ |
2556 | #define EXT4_HTREE_LEVEL_COMPAT 2 | |
2557 | #define EXT4_HTREE_LEVEL 3 | |
2558 | ||
2559 | static inline int ext4_dir_htree_level(struct super_block *sb) | |
2560 | { | |
2561 | return ext4_has_feature_largedir(sb) ? | |
2562 | EXT4_HTREE_LEVEL : EXT4_HTREE_LEVEL_COMPAT; | |
2563 | } | |
2564 | ||
bfff6873 LC |
2565 | /* |
2566 | * Timeout and state flag for lazy initialization inode thread. | |
2567 | */ | |
2568 | #define EXT4_DEF_LI_WAIT_MULT 10 | |
2569 | #define EXT4_DEF_LI_MAX_START_DELAY 5 | |
2570 | #define EXT4_LAZYINIT_QUIT 0x0001 | |
2571 | #define EXT4_LAZYINIT_RUNNING 0x0002 | |
2572 | ||
2573 | /* | |
2574 | * Lazy inode table initialization info | |
2575 | */ | |
2576 | struct ext4_lazy_init { | |
2577 | unsigned long li_state; | |
bfff6873 LC |
2578 | struct list_head li_request_list; |
2579 | struct mutex li_list_mtx; | |
2580 | }; | |
2581 | ||
3d392b26 TT |
2582 | enum ext4_li_mode { |
2583 | EXT4_LI_MODE_PREFETCH_BBITMAP, | |
2584 | EXT4_LI_MODE_ITABLE, | |
2585 | }; | |
2586 | ||
bfff6873 LC |
2587 | struct ext4_li_request { |
2588 | struct super_block *lr_super; | |
3d392b26 TT |
2589 | enum ext4_li_mode lr_mode; |
2590 | ext4_group_t lr_first_not_zeroed; | |
bfff6873 LC |
2591 | ext4_group_t lr_next_group; |
2592 | struct list_head lr_request; | |
2593 | unsigned long lr_next_sched; | |
2594 | unsigned long lr_timeout; | |
2595 | }; | |
2596 | ||
857ac889 LC |
2597 | struct ext4_features { |
2598 | struct kobject f_kobj; | |
2599 | struct completion f_kobj_unregister; | |
2600 | }; | |
2601 | ||
c5e06d10 JL |
2602 | /* |
2603 | * This structure will be used for multiple mount protection. It will be | |
2604 | * written into the block number saved in the s_mmp_block field in the | |
2605 | * superblock. Programs that check MMP should assume that if | |
2606 | * SEQ_FSCK (or any unknown code above SEQ_MAX) is present then it is NOT safe | |
2607 | * to use the filesystem, regardless of how old the timestamp is. | |
2608 | */ | |
2609 | #define EXT4_MMP_MAGIC 0x004D4D50U /* ASCII for MMP */ | |
2610 | #define EXT4_MMP_SEQ_CLEAN 0xFF4D4D50U /* mmp_seq value for clean unmount */ | |
2611 | #define EXT4_MMP_SEQ_FSCK 0xE24D4D50U /* mmp_seq value when being fscked */ | |
2612 | #define EXT4_MMP_SEQ_MAX 0xE24D4D4FU /* maximum valid mmp_seq value */ | |
2613 | ||
2614 | struct mmp_struct { | |
2615 | __le32 mmp_magic; /* Magic number for MMP */ | |
2616 | __le32 mmp_seq; /* Sequence no. updated periodically */ | |
2617 | ||
2618 | /* | |
2619 | * mmp_time, mmp_nodename & mmp_bdevname are only used for information | |
2620 | * purposes and do not affect the correctness of the algorithm | |
2621 | */ | |
2622 | __le64 mmp_time; /* Time last updated */ | |
2623 | char mmp_nodename[64]; /* Node which last updated MMP block */ | |
2624 | char mmp_bdevname[32]; /* Bdev which last updated MMP block */ | |
2625 | ||
2626 | /* | |
2627 | * mmp_check_interval is used to verify if the MMP block has been | |
2628 | * updated on the block device. The value is updated based on the | |
2629 | * maximum time to write the MMP block during an update cycle. | |
2630 | */ | |
2631 | __le16 mmp_check_interval; | |
2632 | ||
2633 | __le16 mmp_pad1; | |
e6153918 DW |
2634 | __le32 mmp_pad2[226]; |
2635 | __le32 mmp_checksum; /* crc32c(uuid+mmp_block) */ | |
c5e06d10 JL |
2636 | }; |
2637 | ||
2638 | /* arguments passed to the mmp thread */ | |
2639 | struct mmpd_data { | |
2640 | struct buffer_head *bh; /* bh from initial read_mmp_block() */ | |
2641 | struct super_block *sb; /* super block of the fs */ | |
2642 | }; | |
2643 | ||
2644 | /* | |
2645 | * Check interval multiplier | |
2646 | * The MMP block is written every update interval and initially checked every | |
2647 | * update interval x the multiplier (the value is then adapted based on the | |
2648 | * write latency). The reason is that writes can be delayed under load and we | |
2649 | * don't want readers to incorrectly assume that the filesystem is no longer | |
2650 | * in use. | |
2651 | */ | |
2652 | #define EXT4_MMP_CHECK_MULT 2UL | |
2653 | ||
2654 | /* | |
2655 | * Minimum interval for MMP checking in seconds. | |
2656 | */ | |
2657 | #define EXT4_MMP_MIN_CHECK_INTERVAL 5UL | |
2658 | ||
2659 | /* | |
2660 | * Maximum interval for MMP checking in seconds. | |
2661 | */ | |
2662 | #define EXT4_MMP_MAX_CHECK_INTERVAL 300UL | |
2663 | ||
ac27a0ec DK |
2664 | /* |
2665 | * Function prototypes | |
2666 | */ | |
2667 | ||
2668 | /* | |
2669 | * Ok, these declarations are also in <linux/kernel.h> but none of the | |
617ba13b | 2670 | * ext4 source programs needs to include it so they are duplicated here. |
ac27a0ec | 2671 | */ |
8c55e204 DK |
2672 | # define NORET_TYPE /**/ |
2673 | # define ATTRIB_NORET __attribute__((noreturn)) | |
2674 | # define NORET_AND noreturn, | |
ac27a0ec | 2675 | |
498e5f24 | 2676 | /* bitmap.c */ |
f6fb99ca | 2677 | extern unsigned int ext4_count_free(char *bitmap, unsigned numchars); |
41a246d1 DW |
2678 | void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group, |
2679 | struct ext4_group_desc *gdp, | |
2680 | struct buffer_head *bh, int sz); | |
2681 | int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, | |
2682 | struct ext4_group_desc *gdp, | |
2683 | struct buffer_head *bh, int sz); | |
fa77dcfa DW |
2684 | void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group, |
2685 | struct ext4_group_desc *gdp, | |
79f1ba49 | 2686 | struct buffer_head *bh); |
fa77dcfa DW |
2687 | int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group, |
2688 | struct ext4_group_desc *gdp, | |
79f1ba49 | 2689 | struct buffer_head *bh); |
498e5f24 | 2690 | |
ac27a0ec | 2691 | /* balloc.c */ |
bd86298e LC |
2692 | extern void ext4_get_group_no_and_offset(struct super_block *sb, |
2693 | ext4_fsblk_t blocknr, | |
2694 | ext4_group_t *blockgrpp, | |
2695 | ext4_grpblk_t *offsetp); | |
2696 | extern ext4_group_t ext4_get_group_number(struct super_block *sb, | |
2697 | ext4_fsblk_t block); | |
2698 | ||
3a5b2ecd MC |
2699 | extern unsigned int ext4_block_group(struct super_block *sb, |
2700 | ext4_fsblk_t blocknr); | |
2701 | extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb, | |
2702 | ext4_fsblk_t blocknr); | |
fd2d4291 AM |
2703 | extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group); |
2704 | extern unsigned long ext4_bg_num_gdb(struct super_block *sb, | |
2705 | ext4_group_t group); | |
7061eba7 | 2706 | extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, |
55f020db AH |
2707 | ext4_fsblk_t goal, |
2708 | unsigned int flags, | |
2709 | unsigned long *count, | |
2710 | int *errp); | |
e7d5f315 TT |
2711 | extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi, |
2712 | s64 nclusters, unsigned int flags); | |
5dee5437 | 2713 | extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *); |
af5bc92d | 2714 | extern void ext4_check_blocks_bitmap(struct super_block *); |
617ba13b | 2715 | extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, |
fd2d4291 | 2716 | ext4_group_t block_group, |
ac27a0ec | 2717 | struct buffer_head ** bh); |
617ba13b | 2718 | extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); |
813e5727 TT |
2719 | |
2720 | extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, | |
cfd73237 AZ |
2721 | ext4_group_t block_group, |
2722 | bool ignore_locked); | |
813e5727 TT |
2723 | extern int ext4_wait_block_bitmap(struct super_block *sb, |
2724 | ext4_group_t block_group, | |
2725 | struct buffer_head *bh); | |
2726 | extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, | |
2727 | ext4_group_t block_group); | |
cff1dfd7 TT |
2728 | extern unsigned ext4_free_clusters_after_init(struct super_block *sb, |
2729 | ext4_group_t block_group, | |
2730 | struct ext4_group_desc *gdp); | |
f86186b4 | 2731 | ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); |
ac27a0ec | 2732 | |
5298d4bf | 2733 | #if IS_ENABLED(CONFIG_UNICODE) |
1ae98e29 | 2734 | extern int ext4_fname_setup_ci_filename(struct inode *dir, |
3ae72562 | 2735 | const struct qstr *iname, |
1ae98e29 | 2736 | struct ext4_filename *fname); |
3ae72562 GKB |
2737 | #endif |
2738 | ||
b1241c8e | 2739 | /* ext4 encryption related stuff goes here crypto.c */ |
643fa961 | 2740 | #ifdef CONFIG_FS_ENCRYPTION |
b1241c8e RH |
2741 | extern const struct fscrypt_operations ext4_cryptops; |
2742 | ||
3030b59c RH |
2743 | int ext4_fname_setup_filename(struct inode *dir, const struct qstr *iname, |
2744 | int lookup, struct ext4_filename *fname); | |
d5d0e8c7 | 2745 | |
3030b59c RH |
2746 | int ext4_fname_prepare_lookup(struct inode *dir, struct dentry *dentry, |
2747 | struct ext4_filename *fname); | |
b7236e21 | 2748 | |
3030b59c | 2749 | void ext4_fname_free_filename(struct ext4_filename *fname); |
3ae72562 | 2750 | |
72f63f4a RH |
2751 | int ext4_ioctl_get_encryption_pwsalt(struct file *filp, void __user *arg); |
2752 | ||
b01531db | 2753 | #else /* !CONFIG_FS_ENCRYPTION */ |
a7550b30 | 2754 | static inline int ext4_fname_setup_filename(struct inode *dir, |
b01531db EB |
2755 | const struct qstr *iname, |
2756 | int lookup, | |
2757 | struct ext4_filename *fname) | |
b7236e21 | 2758 | { |
1ae98e29 | 2759 | int err = 0; |
a7550b30 JK |
2760 | fname->usr_fname = iname; |
2761 | fname->disk_name.name = (unsigned char *) iname->name; | |
2762 | fname->disk_name.len = iname->len; | |
3ae72562 | 2763 | |
5298d4bf | 2764 | #if IS_ENABLED(CONFIG_UNICODE) |
1ae98e29 | 2765 | err = ext4_fname_setup_ci_filename(dir, iname, fname); |
3ae72562 GKB |
2766 | #endif |
2767 | ||
1ae98e29 | 2768 | return err; |
b7236e21 | 2769 | } |
88bd6ccd | 2770 | |
b01531db EB |
2771 | static inline int ext4_fname_prepare_lookup(struct inode *dir, |
2772 | struct dentry *dentry, | |
2773 | struct ext4_filename *fname) | |
2774 | { | |
2775 | return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname); | |
2776 | } | |
2777 | ||
3ae72562 GKB |
2778 | static inline void ext4_fname_free_filename(struct ext4_filename *fname) |
2779 | { | |
5298d4bf | 2780 | #if IS_ENABLED(CONFIG_UNICODE) |
3ae72562 GKB |
2781 | kfree(fname->cf_name.name); |
2782 | fname->cf_name.name = NULL; | |
2783 | #endif | |
2784 | } | |
72f63f4a RH |
2785 | |
2786 | static inline int ext4_ioctl_get_encryption_pwsalt(struct file *filp, | |
2787 | void __user *arg) | |
2788 | { | |
2789 | return -EOPNOTSUPP; | |
2790 | } | |
b01531db | 2791 | #endif /* !CONFIG_FS_ENCRYPTION */ |
88bd6ccd | 2792 | |
ac27a0ec | 2793 | /* dir.c */ |
60fd4da3 | 2794 | extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, |
f7c21177 | 2795 | struct file *, |
60fd4da3 | 2796 | struct ext4_dir_entry_2 *, |
226ba972 TM |
2797 | struct buffer_head *, char *, int, |
2798 | unsigned int); | |
471fbbea | 2799 | #define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ |
f7c21177 | 2800 | unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ |
471fbbea | 2801 | (de), (bh), (buf), (size), (offset))) |
617ba13b | 2802 | extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, |
2f61830a TT |
2803 | __u32 minor_hash, |
2804 | struct ext4_dir_entry_2 *dirent, | |
a7550b30 | 2805 | struct fscrypt_str *ent_name); |
617ba13b | 2806 | extern void ext4_htree_free_dir_info(struct dir_private_info *p); |
978fef91 TM |
2807 | extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, |
2808 | struct buffer_head *bh, | |
2809 | void *buf, int buf_size, | |
5b643f9c | 2810 | struct ext4_filename *fname, |
978fef91 | 2811 | struct ext4_dir_entry_2 **dest_de); |
471fbbea | 2812 | void ext4_insert_dentry(struct inode *dir, struct inode *inode, |
1bc0af60 EB |
2813 | struct ext4_dir_entry_2 *de, |
2814 | int buf_size, | |
2815 | struct ext4_filename *fname); | |
978fef91 TM |
2816 | static inline void ext4_update_dx_flag(struct inode *inode) |
2817 | { | |
f902b216 JK |
2818 | if (!ext4_has_feature_dir_index(inode->i_sb) && |
2819 | ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) { | |
48a34311 JK |
2820 | /* ext4_iget() should have caught this... */ |
2821 | WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb)); | |
978fef91 | 2822 | ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); |
48a34311 | 2823 | } |
978fef91 | 2824 | } |
d6006186 | 2825 | static const unsigned char ext4_filetype_table[] = { |
65d165d9 TM |
2826 | DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK |
2827 | }; | |
2828 | ||
2829 | static inline unsigned char get_dtype(struct super_block *sb, int filetype) | |
2830 | { | |
e2b911c5 | 2831 | if (!ext4_has_feature_filetype(sb) || filetype >= EXT4_FT_MAX) |
65d165d9 TM |
2832 | return DT_UNKNOWN; |
2833 | ||
2834 | return ext4_filetype_table[filetype]; | |
2835 | } | |
40b163f1 DW |
2836 | extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, |
2837 | void *buf, int buf_size); | |
ac27a0ec DK |
2838 | |
2839 | /* fsync.c */ | |
02c24a82 | 2840 | extern int ext4_sync_file(struct file *, loff_t, loff_t, int); |
ac27a0ec DK |
2841 | |
2842 | /* hash.c */ | |
b886ee3e GKB |
2843 | extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len, |
2844 | struct dx_hash_info *hinfo); | |
ac27a0ec DK |
2845 | |
2846 | /* ialloc.c */ | |
8016e29f | 2847 | extern int ext4_mark_inode_used(struct super_block *sb, int ino); |
14f3db55 CB |
2848 | extern struct inode *__ext4_new_inode(struct user_namespace *, handle_t *, |
2849 | struct inode *, umode_t, | |
1139575a | 2850 | const struct qstr *qstr, __u32 goal, |
1b917ed8 TE |
2851 | uid_t *owner, __u32 i_flags, |
2852 | int handle_type, unsigned int line_no, | |
2853 | int nblocks); | |
1139575a | 2854 | |
14f3db55 CB |
2855 | #define ext4_new_inode(handle, dir, mode, qstr, goal, owner, i_flags) \ |
2856 | __ext4_new_inode(&init_user_ns, (handle), (dir), (mode), (qstr), \ | |
2857 | (goal), (owner), i_flags, 0, 0, 0) | |
2858 | #define ext4_new_inode_start_handle(mnt_userns, dir, mode, qstr, goal, owner, \ | |
1139575a | 2859 | type, nblocks) \ |
14f3db55 | 2860 | __ext4_new_inode((mnt_userns), NULL, (dir), (mode), (qstr), (goal), (owner), \ |
1b917ed8 | 2861 | 0, (type), __LINE__, (nblocks)) |
1139575a TT |
2862 | |
2863 | ||
af5bc92d TT |
2864 | extern void ext4_free_inode(handle_t *, struct inode *); |
2865 | extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); | |
2866 | extern unsigned long ext4_count_free_inodes(struct super_block *); | |
2867 | extern unsigned long ext4_count_dirs(struct super_block *); | |
2868 | extern void ext4_check_inodes_bitmap(struct super_block *); | |
61d08673 | 2869 | extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); |
bfff6873 LC |
2870 | extern int ext4_init_inode_table(struct super_block *sb, |
2871 | ext4_group_t group, int barrier); | |
813e5727 | 2872 | extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); |
ac27a0ec | 2873 | |
6866d7b3 | 2874 | /* fast_commit.c */ |
ce8c59d1 | 2875 | int ext4_fc_info_show(struct seq_file *seq, void *v); |
6866d7b3 | 2876 | void ext4_fc_init(struct super_block *sb, journal_t *journal); |
aa75f4d3 | 2877 | void ext4_fc_init_inode(struct inode *inode); |
a80f7fcf | 2878 | void ext4_fc_track_range(handle_t *handle, struct inode *inode, ext4_lblk_t start, |
aa75f4d3 | 2879 | ext4_lblk_t end); |
a80f7fcf HS |
2880 | void __ext4_fc_track_unlink(handle_t *handle, struct inode *inode, |
2881 | struct dentry *dentry); | |
2882 | void __ext4_fc_track_link(handle_t *handle, struct inode *inode, | |
2883 | struct dentry *dentry); | |
2884 | void ext4_fc_track_unlink(handle_t *handle, struct dentry *dentry); | |
2885 | void ext4_fc_track_link(handle_t *handle, struct dentry *dentry); | |
8210bb29 HS |
2886 | void __ext4_fc_track_create(handle_t *handle, struct inode *inode, |
2887 | struct dentry *dentry); | |
a80f7fcf HS |
2888 | void ext4_fc_track_create(handle_t *handle, struct dentry *dentry); |
2889 | void ext4_fc_track_inode(handle_t *handle, struct inode *inode); | |
e85c81ba | 2890 | void ext4_fc_mark_ineligible(struct super_block *sb, int reason, handle_t *handle); |
aa75f4d3 HS |
2891 | void ext4_fc_start_update(struct inode *inode); |
2892 | void ext4_fc_stop_update(struct inode *inode); | |
2893 | void ext4_fc_del(struct inode *inode); | |
8016e29f HS |
2894 | bool ext4_fc_replay_check_excluded(struct super_block *sb, ext4_fsblk_t block); |
2895 | void ext4_fc_replay_cleanup(struct super_block *sb); | |
aa75f4d3 HS |
2896 | int ext4_fc_commit(journal_t *journal, tid_t commit_tid); |
2897 | int __init ext4_fc_init_dentry_cache(void); | |
ab047d51 | 2898 | void ext4_fc_destroy_dentry_cache(void); |
599ea31d XY |
2899 | int ext4_fc_record_regions(struct super_block *sb, int ino, |
2900 | ext4_lblk_t lblk, ext4_fsblk_t pblk, | |
2901 | int len, int replay); | |
aa75f4d3 | 2902 | |
c9de560d | 2903 | /* mballoc.c */ |
247dbed8 | 2904 | extern const struct seq_operations ext4_mb_seq_groups_ops; |
f68f4063 | 2905 | extern const struct seq_operations ext4_mb_seq_structs_summary_ops; |
c9de560d AT |
2906 | extern long ext4_mb_stats; |
2907 | extern long ext4_mb_max_to_scan; | |
a6c75eaf | 2908 | extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset); |
9d99012f | 2909 | extern int ext4_mb_init(struct super_block *); |
c9de560d AT |
2910 | extern int ext4_mb_release(struct super_block *); |
2911 | extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *, | |
2912 | struct ext4_allocation_request *, int *); | |
2913 | extern int ext4_mb_reserve_blocks(struct super_block *, int); | |
27bc446e | 2914 | extern void ext4_discard_preallocations(struct inode *, unsigned int); |
5dabfc78 TT |
2915 | extern int __init ext4_init_mballoc(void); |
2916 | extern void ext4_exit_mballoc(void); | |
3d392b26 TT |
2917 | extern ext4_group_t ext4_mb_prefetch(struct super_block *sb, |
2918 | ext4_group_t group, | |
2919 | unsigned int nr, int *cnt); | |
2920 | extern void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group, | |
2921 | unsigned int nr); | |
2922 | ||
44338711 | 2923 | extern void ext4_free_blocks(handle_t *handle, struct inode *inode, |
e6362609 TT |
2924 | struct buffer_head *bh, ext4_fsblk_t block, |
2925 | unsigned long count, int flags); | |
28623c2f TT |
2926 | extern int ext4_mb_alloc_groupinfo(struct super_block *sb, |
2927 | ext4_group_t ngroups); | |
920313a7 | 2928 | extern int ext4_mb_add_groupinfo(struct super_block *sb, |
5f21b0e6 | 2929 | ext4_group_t i, struct ext4_group_desc *desc); |
cc7365df | 2930 | extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, |
2846e820 | 2931 | ext4_fsblk_t block, unsigned long count); |
7360d173 | 2932 | extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); |
a0154344 | 2933 | extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid); |
8016e29f HS |
2934 | extern void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block, |
2935 | int len, int state); | |
7360d173 | 2936 | |
ac27a0ec | 2937 | /* inode.c */ |
8016e29f HS |
2938 | void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw, |
2939 | struct ext4_inode_info *ei); | |
f348c252 | 2940 | int ext4_inode_is_fast_symlink(struct inode *inode); |
10560082 | 2941 | struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int); |
1c215028 | 2942 | struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int); |
9699d4f9 TE |
2943 | int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, |
2944 | bool wait, struct buffer_head **bhs); | |
705965bd JK |
2945 | int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, |
2946 | struct buffer_head *bh_result, int create); | |
6873fa0d | 2947 | int ext4_get_block(struct inode *inode, sector_t iblock, |
705965bd | 2948 | struct buffer_head *bh_result, int create); |
9c3569b5 TM |
2949 | int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, |
2950 | struct buffer_head *bh, int create); | |
f19d5870 | 2951 | int ext4_walk_page_buffers(handle_t *handle, |
188c299e | 2952 | struct inode *inode, |
f19d5870 TM |
2953 | struct buffer_head *head, |
2954 | unsigned from, | |
2955 | unsigned to, | |
2956 | int *partial, | |
188c299e | 2957 | int (*fn)(handle_t *handle, struct inode *inode, |
f19d5870 | 2958 | struct buffer_head *bh)); |
188c299e | 2959 | int do_journal_get_write_access(handle_t *handle, struct inode *inode, |
f19d5870 | 2960 | struct buffer_head *bh); |
9c3569b5 TM |
2961 | #define FALL_BACK_TO_NONDELALLOC 1 |
2962 | #define CONVERT_INLINE_DATA 2 | |
ac27a0ec | 2963 | |
8a363970 TT |
2964 | typedef enum { |
2965 | EXT4_IGET_NORMAL = 0, | |
2966 | EXT4_IGET_SPECIAL = 0x0001, /* OK to iget a system inode */ | |
2967 | EXT4_IGET_HANDLE = 0x0002 /* Inode # is from a handle */ | |
2968 | } ext4_iget_flags; | |
2969 | ||
2970 | extern struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, | |
2971 | ext4_iget_flags flags, const char *function, | |
2972 | unsigned int line); | |
2973 | ||
2974 | #define ext4_iget(sb, ino, flags) \ | |
2975 | __ext4_iget((sb), (ino), (flags), __func__, __LINE__) | |
2976 | ||
a9185b41 | 2977 | extern int ext4_write_inode(struct inode *, struct writeback_control *); |
549c7297 CB |
2978 | extern int ext4_setattr(struct user_namespace *, struct dentry *, |
2979 | struct iattr *); | |
2980 | extern int ext4_getattr(struct user_namespace *, const struct path *, | |
2981 | struct kstat *, u32, unsigned int); | |
0930fcc1 AV |
2982 | extern void ext4_evict_inode(struct inode *); |
2983 | extern void ext4_clear_inode(struct inode *); | |
549c7297 CB |
2984 | extern int ext4_file_getattr(struct user_namespace *, const struct path *, |
2985 | struct kstat *, u32, unsigned int); | |
af5bc92d | 2986 | extern int ext4_sync_inode(handle_t *, struct inode *); |
aa385729 | 2987 | extern void ext4_dirty_inode(struct inode *, int); |
617ba13b MC |
2988 | extern int ext4_change_inode_journal_flag(struct inode *, int); |
2989 | extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *); | |
8016e29f HS |
2990 | extern int ext4_get_fc_inode_loc(struct super_block *sb, unsigned long ino, |
2991 | struct ext4_iloc *iloc); | |
a361293f | 2992 | extern int ext4_inode_attach_jinode(struct inode *inode); |
91ef4caf | 2993 | extern int ext4_can_truncate(struct inode *inode); |
2c98eb5e | 2994 | extern int ext4_truncate(struct inode *); |
430657b6 | 2995 | extern int ext4_break_layouts(struct inode *); |
ad5cd4f4 | 2996 | extern int ext4_punch_hole(struct file *file, loff_t offset, loff_t length); |
043546e4 | 2997 | extern void ext4_set_inode_flags(struct inode *, bool init); |
ccd2506b | 2998 | extern int ext4_alloc_da_blocks(struct inode *inode); |
617ba13b | 2999 | extern void ext4_set_aops(struct inode *inode); |
a86c6181 | 3000 | extern int ext4_writepage_trans_blocks(struct inode *); |
f3bd1f3f | 3001 | extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); |
a87dd18c LC |
3002 | extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, |
3003 | loff_t lstart, loff_t lend); | |
401b25aa | 3004 | extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf); |
a9e7f447 | 3005 | extern qsize_t *ext4_get_reserved_space(struct inode *inode); |
040cb378 | 3006 | extern int ext4_get_projid(struct inode *inode, kprojid_t *projid); |
f456767d | 3007 | extern void ext4_da_release_space(struct inode *inode, int to_free); |
5f634d06 AK |
3008 | extern void ext4_da_update_reserve_space(struct inode *inode, |
3009 | int used, int quota_claim); | |
53085fac JK |
3010 | extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, |
3011 | ext4_fsblk_t pblk, ext4_lblk_t len); | |
dae1e52c AG |
3012 | |
3013 | /* indirect.c */ | |
3014 | extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, | |
3015 | struct ext4_map_blocks *map, int flags); | |
fa55a0ed | 3016 | extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks); |
819c4920 | 3017 | extern void ext4_ind_truncate(handle_t *, struct inode *inode); |
4f579ae7 LC |
3018 | extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode, |
3019 | ext4_lblk_t start, ext4_lblk_t end); | |
ff9893dc | 3020 | |
ac27a0ec | 3021 | /* ioctl.c */ |
5cdd7b2d | 3022 | extern long ext4_ioctl(struct file *, unsigned int, unsigned long); |
af5bc92d | 3023 | extern long ext4_compat_ioctl(struct file *, unsigned int, unsigned long); |
4db5c2e6 MS |
3024 | int ext4_fileattr_set(struct user_namespace *mnt_userns, |
3025 | struct dentry *dentry, struct fileattr *fa); | |
3026 | int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa); | |
8016e29f | 3027 | extern void ext4_reset_inode_seed(struct inode *inode); |
827891a3 | 3028 | int ext4_update_overhead(struct super_block *sb, bool force); |
ac27a0ec | 3029 | |
c14c6fd5 | 3030 | /* migrate.c */ |
2a43a878 | 3031 | extern int ext4_ext_migrate(struct inode *); |
0d14b098 | 3032 | extern int ext4_ind_migrate(struct inode *inode); |
3d0518f4 | 3033 | |
ac27a0ec | 3034 | /* namei.c */ |
8016e29f HS |
3035 | extern int ext4_init_new_dir(handle_t *handle, struct inode *dir, |
3036 | struct inode *inode); | |
f036adb3 TT |
3037 | extern int ext4_dirblock_csum_verify(struct inode *inode, |
3038 | struct buffer_head *bh); | |
617ba13b | 3039 | extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, |
ac27a0ec | 3040 | __u32 start_minor_hash, __u32 *next_hash); |
5b643f9c TT |
3041 | extern int ext4_search_dir(struct buffer_head *bh, |
3042 | char *search_buf, | |
3043 | int buf_size, | |
3044 | struct inode *dir, | |
3045 | struct ext4_filename *fname, | |
5b643f9c TT |
3046 | unsigned int offset, |
3047 | struct ext4_dir_entry_2 **res_dir); | |
2fe34d29 | 3048 | extern int ext4_generic_delete_entry(struct inode *dir, |
05019a9e TM |
3049 | struct ext4_dir_entry_2 *de_del, |
3050 | struct buffer_head *bh, | |
3051 | void *entry_buf, | |
3052 | int buf_size, | |
3053 | int csum_size); | |
a7550b30 | 3054 | extern bool ext4_empty_dir(struct inode *inode); |
ac27a0ec DK |
3055 | |
3056 | /* resize.c */ | |
1d0c3924 | 3057 | extern void ext4_kvfree_array_rcu(void *to_free); |
617ba13b MC |
3058 | extern int ext4_group_add(struct super_block *sb, |
3059 | struct ext4_new_group_data *input); | |
3060 | extern int ext4_group_extend(struct super_block *sb, | |
3061 | struct ext4_super_block *es, | |
3062 | ext4_fsblk_t n_blocks_count); | |
19c5246d | 3063 | extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count); |
bbc605cd LC |
3064 | extern unsigned int ext4_list_backups(struct super_block *sb, |
3065 | unsigned int *three, unsigned int *five, | |
3066 | unsigned int *seven); | |
ac27a0ec DK |
3067 | |
3068 | /* super.c */ | |
fb265c9c | 3069 | extern struct buffer_head *ext4_sb_bread(struct super_block *sb, |
67c0f556 | 3070 | sector_t block, blk_opf_t op_flags); |
8394a6ab | 3071 | extern struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, |
3072 | sector_t block); | |
67c0f556 | 3073 | extern void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, |
fa491b14 | 3074 | bh_end_io_t *end_io); |
67c0f556 | 3075 | extern int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, |
fa491b14 | 3076 | bh_end_io_t *end_io); |
67c0f556 | 3077 | extern int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait); |
5df1d412 | 3078 | extern void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block); |
ebd173be | 3079 | extern int ext4_seq_options_show(struct seq_file *seq, void *offset); |
952fc18e | 3080 | extern int ext4_calculate_overhead(struct super_block *sb); |
bbc605cd LC |
3081 | extern __le32 ext4_superblock_csum(struct super_block *sb, |
3082 | struct ext4_super_block *es); | |
06db49e6 | 3083 | extern void ext4_superblock_csum_set(struct super_block *sb); |
117fff10 TT |
3084 | extern int ext4_alloc_flex_bg_array(struct super_block *sb, |
3085 | ext4_group_t ngroup); | |
722887dd TT |
3086 | extern const char *ext4_decode_error(struct super_block *sb, int errno, |
3087 | char nbuf[16]); | |
db79e6d1 WS |
3088 | extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb, |
3089 | ext4_group_t block_group, | |
3090 | unsigned int flags); | |
e7c96e8e | 3091 | |
014c9caa JK |
3092 | extern __printf(7, 8) |
3093 | void __ext4_error(struct super_block *, const char *, unsigned int, bool, | |
3094 | int, __u64, const char *, ...); | |
54d3adbc TT |
3095 | extern __printf(6, 7) |
3096 | void __ext4_error_inode(struct inode *, const char *, unsigned int, | |
3097 | ext4_fsblk_t, int, const char *, ...); | |
b9075fa9 | 3098 | extern __printf(5, 6) |
e7c96e8e | 3099 | void __ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t, |
b9075fa9 | 3100 | const char *, ...); |
c398eda0 TT |
3101 | extern void __ext4_std_error(struct super_block *, const char *, |
3102 | unsigned int, int); | |
b9075fa9 JP |
3103 | extern __printf(4, 5) |
3104 | void __ext4_warning(struct super_block *, const char *, unsigned int, | |
3105 | const char *, ...); | |
b03a2f7e AD |
3106 | extern __printf(4, 5) |
3107 | void __ext4_warning_inode(const struct inode *inode, const char *function, | |
3108 | unsigned int line, const char *fmt, ...); | |
b9075fa9 | 3109 | extern __printf(3, 4) |
e7c96e8e | 3110 | void __ext4_msg(struct super_block *, const char *, const char *, ...); |
c5e06d10 JL |
3111 | extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp, |
3112 | const char *, unsigned int, const char *); | |
b9075fa9 JP |
3113 | extern __printf(7, 8) |
3114 | void __ext4_grp_locked_error(const char *, unsigned int, | |
3115 | struct super_block *, ext4_group_t, | |
3116 | unsigned long, ext4_fsblk_t, | |
3117 | const char *, ...); | |
e7c96e8e | 3118 | |
b03a2f7e AD |
3119 | #define EXT4_ERROR_INODE(inode, fmt, a...) \ |
3120 | ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) | |
3121 | ||
54d3adbc TT |
3122 | #define EXT4_ERROR_INODE_ERR(inode, err, fmt, a...) \ |
3123 | __ext4_error_inode((inode), __func__, __LINE__, 0, (err), (fmt), ## a) | |
3124 | ||
3125 | #define ext4_error_inode_block(inode, block, err, fmt, a...) \ | |
3126 | __ext4_error_inode((inode), __func__, __LINE__, (block), (err), \ | |
3127 | (fmt), ## a) | |
b03a2f7e AD |
3128 | |
3129 | #define EXT4_ERROR_FILE(file, block, fmt, a...) \ | |
3130 | ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) | |
3131 | ||
014c9caa JK |
3132 | #define ext4_abort(sb, err, fmt, a...) \ |
3133 | __ext4_error((sb), __func__, __LINE__, true, (err), 0, (fmt), ## a) | |
3134 | ||
e7c96e8e JP |
3135 | #ifdef CONFIG_PRINTK |
3136 | ||
3137 | #define ext4_error_inode(inode, func, line, block, fmt, ...) \ | |
54d3adbc TT |
3138 | __ext4_error_inode(inode, func, line, block, 0, fmt, ##__VA_ARGS__) |
3139 | #define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \ | |
3140 | __ext4_error_inode((inode), (func), (line), (block), \ | |
3141 | (err), (fmt), ##__VA_ARGS__) | |
e7c96e8e JP |
3142 | #define ext4_error_file(file, func, line, block, fmt, ...) \ |
3143 | __ext4_error_file(file, func, line, block, fmt, ##__VA_ARGS__) | |
3144 | #define ext4_error(sb, fmt, ...) \ | |
014c9caa JK |
3145 | __ext4_error((sb), __func__, __LINE__, false, 0, 0, (fmt), \ |
3146 | ##__VA_ARGS__) | |
54d3adbc | 3147 | #define ext4_error_err(sb, err, fmt, ...) \ |
014c9caa JK |
3148 | __ext4_error((sb), __func__, __LINE__, false, (err), 0, (fmt), \ |
3149 | ##__VA_ARGS__) | |
e7c96e8e JP |
3150 | #define ext4_warning(sb, fmt, ...) \ |
3151 | __ext4_warning(sb, __func__, __LINE__, fmt, ##__VA_ARGS__) | |
b03a2f7e AD |
3152 | #define ext4_warning_inode(inode, fmt, ...) \ |
3153 | __ext4_warning_inode(inode, __func__, __LINE__, fmt, ##__VA_ARGS__) | |
e7c96e8e JP |
3154 | #define ext4_msg(sb, level, fmt, ...) \ |
3155 | __ext4_msg(sb, level, fmt, ##__VA_ARGS__) | |
3156 | #define dump_mmp_msg(sb, mmp, msg) \ | |
3157 | __dump_mmp_msg(sb, mmp, __func__, __LINE__, msg) | |
3158 | #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ | |
3159 | __ext4_grp_locked_error(__func__, __LINE__, sb, grp, ino, block, \ | |
3160 | fmt, ##__VA_ARGS__) | |
3161 | ||
3162 | #else | |
3163 | ||
3164 | #define ext4_error_inode(inode, func, line, block, fmt, ...) \ | |
3165 | do { \ | |
3166 | no_printk(fmt, ##__VA_ARGS__); \ | |
54d3adbc TT |
3167 | __ext4_error_inode(inode, "", 0, block, 0, " "); \ |
3168 | } while (0) | |
3169 | #define ext4_error_inode_err(inode, func, line, block, err, fmt, ...) \ | |
3170 | do { \ | |
3171 | no_printk(fmt, ##__VA_ARGS__); \ | |
3172 | __ext4_error_inode(inode, "", 0, block, err, " "); \ | |
e7c96e8e JP |
3173 | } while (0) |
3174 | #define ext4_error_file(file, func, line, block, fmt, ...) \ | |
3175 | do { \ | |
3176 | no_printk(fmt, ##__VA_ARGS__); \ | |
3177 | __ext4_error_file(file, "", 0, block, " "); \ | |
3178 | } while (0) | |
3179 | #define ext4_error(sb, fmt, ...) \ | |
3180 | do { \ | |
3181 | no_printk(fmt, ##__VA_ARGS__); \ | |
014c9caa | 3182 | __ext4_error(sb, "", 0, false, 0, 0, " "); \ |
54d3adbc TT |
3183 | } while (0) |
3184 | #define ext4_error_err(sb, err, fmt, ...) \ | |
3185 | do { \ | |
3186 | no_printk(fmt, ##__VA_ARGS__); \ | |
014c9caa | 3187 | __ext4_error(sb, "", 0, false, err, 0, " "); \ |
e7c96e8e JP |
3188 | } while (0) |
3189 | #define ext4_warning(sb, fmt, ...) \ | |
3190 | do { \ | |
3191 | no_printk(fmt, ##__VA_ARGS__); \ | |
3192 | __ext4_warning(sb, "", 0, " "); \ | |
3193 | } while (0) | |
b03a2f7e AD |
3194 | #define ext4_warning_inode(inode, fmt, ...) \ |
3195 | do { \ | |
3196 | no_printk(fmt, ##__VA_ARGS__); \ | |
3197 | __ext4_warning_inode(inode, "", 0, " "); \ | |
3198 | } while (0) | |
e7c96e8e JP |
3199 | #define ext4_msg(sb, level, fmt, ...) \ |
3200 | do { \ | |
3201 | no_printk(fmt, ##__VA_ARGS__); \ | |
3202 | __ext4_msg(sb, "", " "); \ | |
3203 | } while (0) | |
3204 | #define dump_mmp_msg(sb, mmp, msg) \ | |
3205 | __dump_mmp_msg(sb, mmp, "", 0, "") | |
3206 | #define ext4_grp_locked_error(sb, grp, ino, block, fmt, ...) \ | |
3207 | do { \ | |
3208 | no_printk(fmt, ##__VA_ARGS__); \ | |
3209 | __ext4_grp_locked_error("", 0, sb, grp, ino, block, " "); \ | |
3210 | } while (0) | |
3211 | ||
3212 | #endif | |
3213 | ||
8fadc143 AR |
3214 | extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
3215 | struct ext4_group_desc *bg); | |
3216 | extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, | |
3217 | struct ext4_group_desc *bg); | |
3218 | extern ext4_fsblk_t ext4_inode_table(struct super_block *sb, | |
3219 | struct ext4_group_desc *bg); | |
021b65bb TT |
3220 | extern __u32 ext4_free_group_clusters(struct super_block *sb, |
3221 | struct ext4_group_desc *bg); | |
560671a0 AK |
3222 | extern __u32 ext4_free_inodes_count(struct super_block *sb, |
3223 | struct ext4_group_desc *bg); | |
3224 | extern __u32 ext4_used_dirs_count(struct super_block *sb, | |
3225 | struct ext4_group_desc *bg); | |
3226 | extern __u32 ext4_itable_unused_count(struct super_block *sb, | |
3227 | struct ext4_group_desc *bg); | |
8fadc143 AR |
3228 | extern void ext4_block_bitmap_set(struct super_block *sb, |
3229 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
3230 | extern void ext4_inode_bitmap_set(struct super_block *sb, | |
3231 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
3232 | extern void ext4_inode_table_set(struct super_block *sb, | |
3233 | struct ext4_group_desc *bg, ext4_fsblk_t blk); | |
021b65bb TT |
3234 | extern void ext4_free_group_clusters_set(struct super_block *sb, |
3235 | struct ext4_group_desc *bg, | |
3236 | __u32 count); | |
560671a0 AK |
3237 | extern void ext4_free_inodes_set(struct super_block *sb, |
3238 | struct ext4_group_desc *bg, __u32 count); | |
3239 | extern void ext4_used_dirs_set(struct super_block *sb, | |
3240 | struct ext4_group_desc *bg, __u32 count); | |
3241 | extern void ext4_itable_unused_set(struct super_block *sb, | |
3242 | struct ext4_group_desc *bg, __u32 count); | |
feb0ab32 | 3243 | extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group, |
bb23c20a | 3244 | struct ext4_group_desc *gdp); |
feb0ab32 DW |
3245 | extern void ext4_group_desc_csum_set(struct super_block *sb, __u32 group, |
3246 | struct ext4_group_desc *gdp); | |
7f511862 TT |
3247 | extern int ext4_register_li_request(struct super_block *sb, |
3248 | ext4_group_t first_not_zeroed); | |
bd81d8ee | 3249 | |
9aa5d32b DM |
3250 | static inline int ext4_has_metadata_csum(struct super_block *sb) |
3251 | { | |
e2b911c5 | 3252 | WARN_ON_ONCE(ext4_has_feature_metadata_csum(sb) && |
9aa5d32b DM |
3253 | !EXT4_SB(sb)->s_chksum_driver); |
3254 | ||
dec214d0 TE |
3255 | return ext4_has_feature_metadata_csum(sb) && |
3256 | (EXT4_SB(sb)->s_chksum_driver != NULL); | |
9aa5d32b | 3257 | } |
dec214d0 TE |
3258 | |
3259 | static inline int ext4_has_group_desc_csum(struct super_block *sb) | |
3260 | { | |
3261 | return ext4_has_feature_gdt_csum(sb) || ext4_has_metadata_csum(sb); | |
3262 | } | |
3263 | ||
81e8c3c5 PM |
3264 | #define ext4_read_incompat_64bit_val(es, name) \ |
3265 | (((es)->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT) \ | |
3266 | ? (ext4_fsblk_t)le32_to_cpu(es->name##_hi) << 32 : 0) | \ | |
3267 | le32_to_cpu(es->name##_lo)) | |
3268 | ||
bd81d8ee LV |
3269 | static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) |
3270 | { | |
81e8c3c5 | 3271 | return ext4_read_incompat_64bit_val(es, s_blocks_count); |
bd81d8ee LV |
3272 | } |
3273 | ||
3274 | static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es) | |
3275 | { | |
81e8c3c5 | 3276 | return ext4_read_incompat_64bit_val(es, s_r_blocks_count); |
bd81d8ee LV |
3277 | } |
3278 | ||
3279 | static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es) | |
3280 | { | |
81e8c3c5 | 3281 | return ext4_read_incompat_64bit_val(es, s_free_blocks_count); |
bd81d8ee LV |
3282 | } |
3283 | ||
3284 | static inline void ext4_blocks_count_set(struct ext4_super_block *es, | |
3285 | ext4_fsblk_t blk) | |
3286 | { | |
6bc9feff | 3287 | es->s_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
3288 | es->s_blocks_count_hi = cpu_to_le32(blk >> 32); |
3289 | } | |
3290 | ||
3291 | static inline void ext4_free_blocks_count_set(struct ext4_super_block *es, | |
3292 | ext4_fsblk_t blk) | |
3293 | { | |
308ba3ec | 3294 | es->s_free_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
3295 | es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32); |
3296 | } | |
3297 | ||
3298 | static inline void ext4_r_blocks_count_set(struct ext4_super_block *es, | |
3299 | ext4_fsblk_t blk) | |
3300 | { | |
308ba3ec | 3301 | es->s_r_blocks_count_lo = cpu_to_le32((u32)blk); |
bd81d8ee LV |
3302 | es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32); |
3303 | } | |
3304 | ||
e08ac99f AB |
3305 | static inline loff_t ext4_isize(struct super_block *sb, |
3306 | struct ext4_inode *raw_inode) | |
a48380f7 | 3307 | { |
e08ac99f AB |
3308 | if (ext4_has_feature_largedir(sb) || |
3309 | S_ISREG(le16_to_cpu(raw_inode->i_mode))) | |
06a279d6 TT |
3310 | return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) | |
3311 | le32_to_cpu(raw_inode->i_size_lo); | |
e08ac99f AB |
3312 | |
3313 | return (loff_t) le32_to_cpu(raw_inode->i_size_lo); | |
a48380f7 | 3314 | } |
bd81d8ee | 3315 | |
a48380f7 AK |
3316 | static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size) |
3317 | { | |
3318 | raw_inode->i_size_lo = cpu_to_le32(i_size); | |
3319 | raw_inode->i_size_high = cpu_to_le32(i_size >> 32); | |
3320 | } | |
ac27a0ec | 3321 | |
c9de560d AT |
3322 | static inline |
3323 | struct ext4_group_info *ext4_get_group_info(struct super_block *sb, | |
af5bc92d | 3324 | ext4_group_t group) |
c9de560d | 3325 | { |
df3da4ea | 3326 | struct ext4_group_info **grp_info; |
c9de560d | 3327 | long indexv, indexh; |
2f2e09eb | 3328 | BUG_ON(group >= EXT4_SB(sb)->s_groups_count); |
c9de560d AT |
3329 | indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb)); |
3330 | indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1); | |
df3da4ea SJS |
3331 | grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv); |
3332 | return grp_info[indexh]; | |
c9de560d AT |
3333 | } |
3334 | ||
8df9675f TT |
3335 | /* |
3336 | * Reading s_groups_count requires using smp_rmb() afterwards. See | |
3337 | * the locking protocol documented in the comments of ext4_group_add() | |
3338 | * in resize.c | |
3339 | */ | |
3340 | static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) | |
3341 | { | |
3342 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
3343 | ||
3344 | smp_rmb(); | |
3345 | return ngroups; | |
3346 | } | |
c9de560d | 3347 | |
772cb7c8 JS |
3348 | static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, |
3349 | ext4_group_t block_group) | |
3350 | { | |
3351 | return block_group >> sbi->s_log_groups_per_flex; | |
3352 | } | |
3353 | ||
3354 | static inline unsigned int ext4_flex_bg_size(struct ext4_sb_info *sbi) | |
3355 | { | |
3356 | return 1 << sbi->s_log_groups_per_flex; | |
3357 | } | |
3358 | ||
617ba13b | 3359 | #define ext4_std_error(sb, errno) \ |
ac27a0ec DK |
3360 | do { \ |
3361 | if ((errno)) \ | |
c398eda0 | 3362 | __ext4_std_error((sb), __func__, __LINE__, (errno)); \ |
ac27a0ec DK |
3363 | } while (0) |
3364 | ||
a30d542a | 3365 | #ifdef CONFIG_SMP |
df55c99d TT |
3366 | /* Each CPU can accumulate percpu_counter_batch clusters in their local |
3367 | * counters. So we need to make sure we have free clusters more | |
179f7ebf | 3368 | * than percpu_counter_batch * nr_cpu_ids. Also add a window of 4 times. |
a30d542a | 3369 | */ |
df55c99d | 3370 | #define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids)) |
a30d542a | 3371 | #else |
df55c99d | 3372 | #define EXT4_FREECLUSTERS_WATERMARK 0 |
a30d542a AK |
3373 | #endif |
3374 | ||
f340b3d9 | 3375 | /* Update i_disksize. Requires i_rwsem to avoid races with truncate */ |
cf17fea6 AK |
3376 | static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize) |
3377 | { | |
90e775b7 | 3378 | WARN_ON_ONCE(S_ISREG(inode->i_mode) && |
5955102c | 3379 | !inode_is_locked(inode)); |
90e775b7 JK |
3380 | down_write(&EXT4_I(inode)->i_data_sem); |
3381 | if (newsize > EXT4_I(inode)->i_disksize) | |
35df4299 | 3382 | WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize); |
90e775b7 JK |
3383 | up_write(&EXT4_I(inode)->i_data_sem); |
3384 | } | |
3385 | ||
f340b3d9 | 3386 | /* Update i_size, i_disksize. Requires i_rwsem to avoid races with truncate */ |
4631dbf6 DM |
3387 | static inline int ext4_update_inode_size(struct inode *inode, loff_t newsize) |
3388 | { | |
3389 | int changed = 0; | |
3390 | ||
3391 | if (newsize > inode->i_size) { | |
3392 | i_size_write(inode, newsize); | |
3393 | changed = 1; | |
3394 | } | |
3395 | if (newsize > EXT4_I(inode)->i_disksize) { | |
3396 | ext4_update_i_disksize(inode, newsize); | |
3397 | changed |= 2; | |
3398 | } | |
3399 | return changed; | |
3400 | } | |
3401 | ||
01127848 JK |
3402 | int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, |
3403 | loff_t len); | |
3404 | ||
5d1b1b3f AK |
3405 | struct ext4_group_info { |
3406 | unsigned long bb_state; | |
addd752c CX |
3407 | #ifdef AGGRESSIVE_CHECK |
3408 | unsigned long bb_check_counter; | |
3409 | #endif | |
5d1b1b3f | 3410 | struct rb_root bb_free_root; |
a36b4498 ES |
3411 | ext4_grpblk_t bb_first_free; /* first free block */ |
3412 | ext4_grpblk_t bb_free; /* total free blocks */ | |
3413 | ext4_grpblk_t bb_fragments; /* nr of freespace fragments */ | |
83e80a6e JK |
3414 | int bb_avg_fragment_size_order; /* order of average |
3415 | fragment in BG */ | |
8a57d9d6 | 3416 | ext4_grpblk_t bb_largest_free_order;/* order of largest frag in BG */ |
196e402a | 3417 | ext4_group_t bb_group; /* Group number */ |
5d1b1b3f AK |
3418 | struct list_head bb_prealloc_list; |
3419 | #ifdef DOUBLE_CHECK | |
3420 | void *bb_bitmap; | |
3421 | #endif | |
3422 | struct rw_semaphore alloc_sem; | |
83e80a6e | 3423 | struct list_head bb_avg_fragment_size_node; |
196e402a | 3424 | struct list_head bb_largest_free_order_node; |
a36b4498 ES |
3425 | ext4_grpblk_t bb_counters[]; /* Nr of free power-of-two-block |
3426 | * regions, index is order. | |
3427 | * bb_counters[3] = 5 means | |
3428 | * 5 free 8-block regions. */ | |
5d1b1b3f AK |
3429 | }; |
3430 | ||
3d56b8d2 TM |
3431 | #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 |
3432 | #define EXT4_GROUP_INFO_WAS_TRIMMED_BIT 1 | |
163a203d | 3433 | #define EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT 2 |
87a39389 | 3434 | #define EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT 3 |
db79e6d1 WS |
3435 | #define EXT4_GROUP_INFO_BBITMAP_CORRUPT \ |
3436 | (1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT) | |
3437 | #define EXT4_GROUP_INFO_IBITMAP_CORRUPT \ | |
3438 | (1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT) | |
cfd73237 | 3439 | #define EXT4_GROUP_INFO_BBITMAP_READ_BIT 4 |
5d1b1b3f AK |
3440 | |
3441 | #define EXT4_MB_GRP_NEED_INIT(grp) \ | |
3442 | (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) | |
163a203d DW |
3443 | #define EXT4_MB_GRP_BBITMAP_CORRUPT(grp) \ |
3444 | (test_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &((grp)->bb_state))) | |
87a39389 DW |
3445 | #define EXT4_MB_GRP_IBITMAP_CORRUPT(grp) \ |
3446 | (test_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &((grp)->bb_state))) | |
5d1b1b3f | 3447 | |
3d56b8d2 TM |
3448 | #define EXT4_MB_GRP_WAS_TRIMMED(grp) \ |
3449 | (test_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) | |
3450 | #define EXT4_MB_GRP_SET_TRIMMED(grp) \ | |
3451 | (set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) | |
3452 | #define EXT4_MB_GRP_CLEAR_TRIMMED(grp) \ | |
3453 | (clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state))) | |
cfd73237 AZ |
3454 | #define EXT4_MB_GRP_TEST_AND_SET_READ(grp) \ |
3455 | (test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_READ_BIT, &((grp)->bb_state))) | |
3d56b8d2 | 3456 | |
50797481 TT |
3457 | #define EXT4_MAX_CONTENTION 8 |
3458 | #define EXT4_CONTENTION_THRESHOLD 2 | |
3459 | ||
955ce5f5 AK |
3460 | static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, |
3461 | ext4_group_t group) | |
5d1b1b3f | 3462 | { |
955ce5f5 AK |
3463 | return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); |
3464 | } | |
5d1b1b3f | 3465 | |
50797481 TT |
3466 | /* |
3467 | * Returns true if the filesystem is busy enough that attempts to | |
3468 | * access the block group locks has run into contention. | |
3469 | */ | |
3470 | static inline int ext4_fs_is_busy(struct ext4_sb_info *sbi) | |
3471 | { | |
3472 | return (atomic_read(&sbi->s_lock_busy) > EXT4_CONTENTION_THRESHOLD); | |
3473 | } | |
3474 | ||
955ce5f5 AK |
3475 | static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) |
3476 | { | |
50797481 TT |
3477 | spinlock_t *lock = ext4_group_lock_ptr(sb, group); |
3478 | if (spin_trylock(lock)) | |
3479 | /* | |
3480 | * We're able to grab the lock right away, so drop the | |
3481 | * lock contention counter. | |
3482 | */ | |
3483 | atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, -1, 0); | |
3484 | else { | |
3485 | /* | |
3486 | * The lock is busy, so bump the contention counter, | |
3487 | * and then wait on the spin lock. | |
3488 | */ | |
3489 | atomic_add_unless(&EXT4_SB(sb)->s_lock_busy, 1, | |
3490 | EXT4_MAX_CONTENTION); | |
3491 | spin_lock(lock); | |
3492 | } | |
5d1b1b3f AK |
3493 | } |
3494 | ||
3495 | static inline void ext4_unlock_group(struct super_block *sb, | |
3496 | ext4_group_t group) | |
3497 | { | |
955ce5f5 | 3498 | spin_unlock(ext4_group_lock_ptr(sb, group)); |
5d1b1b3f AK |
3499 | } |
3500 | ||
f177ee08 RA |
3501 | #ifdef CONFIG_QUOTA |
3502 | static inline bool ext4_quota_capable(struct super_block *sb) | |
3503 | { | |
3504 | return (test_opt(sb, QUOTA) || ext4_has_feature_quota(sb)); | |
3505 | } | |
3506 | ||
3507 | static inline bool ext4_is_quota_journalled(struct super_block *sb) | |
3508 | { | |
3509 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3510 | ||
3511 | return (ext4_has_feature_quota(sb) || | |
3512 | sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]); | |
3513 | } | |
25c6d98f | 3514 | int ext4_enable_quotas(struct super_block *sb); |
f177ee08 RA |
3515 | #endif |
3516 | ||
1f7d1e77 TT |
3517 | /* |
3518 | * Block validity checking | |
3519 | */ | |
3520 | #define ext4_check_indirect_blockref(inode, bh) \ | |
3521 | ext4_check_blockref(__func__, __LINE__, inode, \ | |
3522 | (__le32 *)(bh)->b_data, \ | |
3523 | EXT4_ADDR_PER_BLOCK((inode)->i_sb)) | |
3524 | ||
3525 | #define ext4_ind_check_inode(inode) \ | |
3526 | ext4_check_blockref(__func__, __LINE__, inode, \ | |
3527 | EXT4_I(inode)->i_data, \ | |
3528 | EXT4_NDIR_BLOCKS) | |
3529 | ||
ac27a0ec DK |
3530 | /* |
3531 | * Inodes and files operations | |
3532 | */ | |
3533 | ||
3534 | /* dir.c */ | |
617ba13b | 3535 | extern const struct file_operations ext4_dir_operations; |
ac27a0ec DK |
3536 | |
3537 | /* file.c */ | |
c5ef1c42 | 3538 | extern const struct inode_operations ext4_file_inode_operations; |
617ba13b | 3539 | extern const struct file_operations ext4_file_operations; |
e0d10bfa | 3540 | extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin); |
ac27a0ec | 3541 | |
95eaefbd | 3542 | /* inline.c */ |
95eaefbd TT |
3543 | extern int ext4_get_max_inline_size(struct inode *inode); |
3544 | extern int ext4_find_inline_data_nolock(struct inode *inode); | |
95eaefbd TT |
3545 | extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, |
3546 | unsigned int len); | |
3547 | extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); | |
3548 | ||
3549 | extern int ext4_readpage_inline(struct inode *inode, struct page *page); | |
3550 | extern int ext4_try_to_write_inline_data(struct address_space *mapping, | |
3551 | struct inode *inode, | |
3552 | loff_t pos, unsigned len, | |
95eaefbd TT |
3553 | struct page **pagep); |
3554 | extern int ext4_write_inline_data_end(struct inode *inode, | |
3555 | loff_t pos, unsigned len, | |
3556 | unsigned copied, | |
3557 | struct page *page); | |
3558 | extern struct buffer_head * | |
3559 | ext4_journalled_write_inline_data(struct inode *inode, | |
3560 | unsigned len, | |
3561 | struct page *page); | |
3562 | extern int ext4_da_write_inline_data_begin(struct address_space *mapping, | |
3563 | struct inode *inode, | |
3564 | loff_t pos, unsigned len, | |
95eaefbd TT |
3565 | struct page **pagep, |
3566 | void **fsdata); | |
5b643f9c TT |
3567 | extern int ext4_try_add_inline_entry(handle_t *handle, |
3568 | struct ext4_filename *fname, | |
56a04915 | 3569 | struct inode *dir, struct inode *inode); |
95eaefbd TT |
3570 | extern int ext4_try_create_inline_dir(handle_t *handle, |
3571 | struct inode *parent, | |
3572 | struct inode *inode); | |
3573 | extern int ext4_read_inline_dir(struct file *filp, | |
725bebb2 | 3574 | struct dir_context *ctx, |
95eaefbd | 3575 | int *has_inline_data); |
7633b08b TT |
3576 | extern int ext4_inlinedir_to_tree(struct file *dir_file, |
3577 | struct inode *dir, ext4_lblk_t block, | |
3578 | struct dx_hash_info *hinfo, | |
3579 | __u32 start_hash, __u32 start_minor_hash, | |
3580 | int *has_inline_data); | |
95eaefbd | 3581 | extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, |
5b643f9c | 3582 | struct ext4_filename *fname, |
95eaefbd TT |
3583 | struct ext4_dir_entry_2 **res_dir, |
3584 | int *has_inline_data); | |
3585 | extern int ext4_delete_inline_entry(handle_t *handle, | |
3586 | struct inode *dir, | |
3587 | struct ext4_dir_entry_2 *de_del, | |
3588 | struct buffer_head *bh, | |
3589 | int *has_inline_data); | |
a7550b30 | 3590 | extern bool empty_inline_dir(struct inode *dir, int *has_inline_data); |
95eaefbd TT |
3591 | extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, |
3592 | struct ext4_dir_entry_2 **parent_de, | |
3593 | int *retval); | |
3594 | extern int ext4_inline_data_fiemap(struct inode *inode, | |
3595 | struct fiemap_extent_info *fieinfo, | |
d952d69e | 3596 | int *has_inline, __u64 start, __u64 len); |
5a57bca9 | 3597 | extern void *ext4_read_inline_link(struct inode *inode); |
7046ae35 AG |
3598 | |
3599 | struct iomap; | |
3600 | extern int ext4_inline_data_iomap(struct inode *inode, struct iomap *iomap); | |
3601 | ||
01daf945 | 3602 | extern int ext4_inline_data_truncate(struct inode *inode, int *has_inline); |
95eaefbd TT |
3603 | |
3604 | extern int ext4_convert_inline_data(struct inode *inode); | |
3605 | ||
83447ccb ZL |
3606 | static inline int ext4_has_inline_data(struct inode *inode) |
3607 | { | |
3608 | return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && | |
3609 | EXT4_I(inode)->i_inline_off; | |
3610 | } | |
3611 | ||
ac27a0ec | 3612 | /* namei.c */ |
c5ef1c42 AV |
3613 | extern const struct inode_operations ext4_dir_inode_operations; |
3614 | extern const struct inode_operations ext4_special_inode_operations; | |
596397b7 | 3615 | extern struct dentry *ext4_get_parent(struct dentry *child); |
a774f9c2 TM |
3616 | extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, |
3617 | struct ext4_dir_entry_2 *de, | |
3618 | int blocksize, int csum_size, | |
3619 | unsigned int parent_ino, int dotdot_real_len); | |
ddce3b94 TT |
3620 | extern void ext4_initialize_dirent_tail(struct buffer_head *bh, |
3621 | unsigned int blocksize); | |
f036adb3 TT |
3622 | extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode, |
3623 | struct buffer_head *bh); | |
a80f7fcf | 3624 | extern int __ext4_unlink(handle_t *handle, struct inode *dir, const struct qstr *d_name, |
8016e29f HS |
3625 | struct inode *inode); |
3626 | extern int __ext4_link(struct inode *dir, struct inode *inode, | |
3627 | struct dentry *dentry); | |
b886ee3e | 3628 | |
8af0f082 | 3629 | #define S_SHIFT 12 |
381cebfe | 3630 | static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = { |
8af0f082 TM |
3631 | [S_IFREG >> S_SHIFT] = EXT4_FT_REG_FILE, |
3632 | [S_IFDIR >> S_SHIFT] = EXT4_FT_DIR, | |
3633 | [S_IFCHR >> S_SHIFT] = EXT4_FT_CHRDEV, | |
3634 | [S_IFBLK >> S_SHIFT] = EXT4_FT_BLKDEV, | |
3635 | [S_IFIFO >> S_SHIFT] = EXT4_FT_FIFO, | |
3636 | [S_IFSOCK >> S_SHIFT] = EXT4_FT_SOCK, | |
3637 | [S_IFLNK >> S_SHIFT] = EXT4_FT_SYMLINK, | |
3638 | }; | |
3639 | ||
3640 | static inline void ext4_set_de_type(struct super_block *sb, | |
3641 | struct ext4_dir_entry_2 *de, | |
3642 | umode_t mode) { | |
e2b911c5 | 3643 | if (ext4_has_feature_filetype(sb)) |
8af0f082 TM |
3644 | de->file_type = ext4_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; |
3645 | } | |
3646 | ||
f64e02fe | 3647 | /* readpages.c */ |
a07f624b | 3648 | extern int ext4_mpage_readpages(struct inode *inode, |
6311f91f | 3649 | struct readahead_control *rac, struct page *page); |
22cfe4b4 EB |
3650 | extern int __init ext4_init_post_read_processing(void); |
3651 | extern void ext4_exit_post_read_processing(void); | |
ac27a0ec DK |
3652 | |
3653 | /* symlink.c */ | |
a7a67e8a | 3654 | extern const struct inode_operations ext4_encrypted_symlink_inode_operations; |
c5ef1c42 AV |
3655 | extern const struct inode_operations ext4_symlink_inode_operations; |
3656 | extern const struct inode_operations ext4_fast_symlink_inode_operations; | |
ac27a0ec | 3657 | |
b5799018 | 3658 | /* sysfs.c */ |
d578b994 | 3659 | extern void ext4_notify_error_sysfs(struct ext4_sb_info *sbi); |
b5799018 | 3660 | extern int ext4_register_sysfs(struct super_block *sb); |
ebd173be | 3661 | extern void ext4_unregister_sysfs(struct super_block *sb); |
b5799018 TT |
3662 | extern int __init ext4_init_sysfs(void); |
3663 | extern void ext4_exit_sysfs(void); | |
3664 | ||
6fd058f7 TT |
3665 | /* block_validity */ |
3666 | extern void ext4_release_system_zone(struct super_block *sb); | |
3667 | extern int ext4_setup_system_zone(struct super_block *sb); | |
5dabfc78 TT |
3668 | extern int __init ext4_init_system_zone(void); |
3669 | extern void ext4_exit_system_zone(void); | |
ce9f24cc JK |
3670 | extern int ext4_inode_block_valid(struct inode *inode, |
3671 | ext4_fsblk_t start_blk, | |
3672 | unsigned int count); | |
1f7d1e77 TT |
3673 | extern int ext4_check_blockref(const char *, unsigned int, |
3674 | struct inode *, __le32 *, unsigned int); | |
6bc6c2bd RH |
3675 | extern int ext4_sb_block_valid(struct super_block *sb, struct inode *inode, |
3676 | ext4_fsblk_t start_blk, unsigned int count); | |
3677 | ||
6fd058f7 | 3678 | |
a86c6181 | 3679 | /* extents.c */ |
4a092d73 TT |
3680 | struct ext4_ext_path; |
3681 | struct ext4_extent; | |
3682 | ||
d7b2a00c ZL |
3683 | /* |
3684 | * Maximum number of logical blocks in a file; ext4_extent's ee_block is | |
3685 | * __le32. | |
3686 | */ | |
3687 | #define EXT_MAX_BLOCKS 0xffffffff | |
3688 | ||
4209ae12 | 3689 | extern void ext4_ext_tree_init(handle_t *handle, struct inode *inode); |
fffb2739 | 3690 | extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents); |
e35fd660 TT |
3691 | extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, |
3692 | struct ext4_map_blocks *map, int flags); | |
d0abb36d | 3693 | extern int ext4_ext_truncate(handle_t *, struct inode *); |
26a4c0c6 TT |
3694 | extern int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, |
3695 | ext4_lblk_t end); | |
a86c6181 AT |
3696 | extern void ext4_ext_init(struct super_block *); |
3697 | extern void ext4_ext_release(struct super_block *); | |
2fe17c10 | 3698 | extern long ext4_fallocate(struct file *file, int mode, loff_t offset, |
a2df2a63 | 3699 | loff_t len); |
6b523df4 JK |
3700 | extern int ext4_convert_unwritten_extents(handle_t *handle, struct inode *inode, |
3701 | loff_t offset, ssize_t len); | |
a00713ea RH |
3702 | extern int ext4_convert_unwritten_io_end_vec(handle_t *handle, |
3703 | ext4_io_end_t *io_end); | |
e35fd660 TT |
3704 | extern int ext4_map_blocks(handle_t *handle, struct inode *inode, |
3705 | struct ext4_map_blocks *map, int flags); | |
4a092d73 TT |
3706 | extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, |
3707 | int num, | |
3708 | struct ext4_ext_path *path); | |
4a092d73 | 3709 | extern int ext4_ext_insert_extent(handle_t *, struct inode *, |
dfe50809 | 3710 | struct ext4_ext_path **, |
4a092d73 | 3711 | struct ext4_extent *, int); |
ed8a1a76 TT |
3712 | extern struct ext4_ext_path *ext4_find_extent(struct inode *, ext4_lblk_t, |
3713 | struct ext4_ext_path **, | |
3714 | int flags); | |
4a092d73 TT |
3715 | extern void ext4_ext_drop_refs(struct ext4_ext_path *); |
3716 | extern int ext4_ext_check_inode(struct inode *inode); | |
fcf6b1b7 | 3717 | extern ext4_lblk_t ext4_ext_next_allocated_block(struct ext4_ext_path *path); |
3a06d778 AK |
3718 | extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
3719 | __u64 start, __u64 len); | |
bb5835ed TT |
3720 | extern int ext4_get_es_cache(struct inode *inode, |
3721 | struct fiemap_extent_info *fieinfo, | |
3722 | __u64 start, __u64 len); | |
7869a4a6 | 3723 | extern int ext4_ext_precache(struct inode *inode); |
fcf6b1b7 DM |
3724 | extern int ext4_swap_extents(handle_t *handle, struct inode *inode1, |
3725 | struct inode *inode2, ext4_lblk_t lblk1, | |
3726 | ext4_lblk_t lblk2, ext4_lblk_t count, | |
3727 | int mark_unwritten,int *err); | |
0b02f4c0 | 3728 | extern int ext4_clu_mapped(struct inode *inode, ext4_lblk_t lclu); |
a4130367 | 3729 | extern int ext4_datasem_ensure_credits(handle_t *handle, struct inode *inode, |
83448bdf JK |
3730 | int check_cred, int restart_cred, |
3731 | int revoke_cred); | |
8016e29f HS |
3732 | extern void ext4_ext_replay_shrink_inode(struct inode *inode, ext4_lblk_t end); |
3733 | extern int ext4_ext_replay_set_iblocks(struct inode *inode); | |
3734 | extern int ext4_ext_replay_update_ex(struct inode *inode, ext4_lblk_t start, | |
3735 | int len, int unwritten, ext4_fsblk_t pblk); | |
3736 | extern int ext4_ext_clear_bb(struct inode *inode); | |
a4130367 | 3737 | |
4a092d73 | 3738 | |
748de673 | 3739 | /* move_extent.c */ |
393d1d1d DTB |
3740 | extern void ext4_double_down_write_data_sem(struct inode *first, |
3741 | struct inode *second); | |
3742 | extern void ext4_double_up_write_data_sem(struct inode *orig_inode, | |
3743 | struct inode *donor_inode); | |
748de673 AF |
3744 | extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, |
3745 | __u64 start_orig, __u64 start_donor, | |
3746 | __u64 len, __u64 *moved_len); | |
3747 | ||
bd2d0210 | 3748 | /* page-io.c */ |
5dabfc78 TT |
3749 | extern int __init ext4_init_pageio(void); |
3750 | extern void ext4_exit_pageio(void); | |
bd2d0210 | 3751 | extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); |
97a851ed JK |
3752 | extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end); |
3753 | extern int ext4_put_io_end(ext4_io_end_t *io_end); | |
3754 | extern void ext4_put_io_end_defer(ext4_io_end_t *io_end); | |
3755 | extern void ext4_io_submit_init(struct ext4_io_submit *io, | |
3756 | struct writeback_control *wbc); | |
2e8fa54e | 3757 | extern void ext4_end_io_rsv_work(struct work_struct *work); |
bd2d0210 TT |
3758 | extern void ext4_io_submit(struct ext4_io_submit *io); |
3759 | extern int ext4_bio_write_page(struct ext4_io_submit *io, | |
3760 | struct page *page, | |
3761 | int len, | |
1c8349a1 | 3762 | bool keep_towrite); |
c8cc8816 RH |
3763 | extern struct ext4_io_end_vec *ext4_alloc_io_end_vec(ext4_io_end_t *io_end); |
3764 | extern struct ext4_io_end_vec *ext4_last_io_end_vec(ext4_io_end_t *io_end); | |
3a06d778 | 3765 | |
c5e06d10 JL |
3766 | /* mmp.c */ |
3767 | extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t); | |
3768 | ||
618f0031 PS |
3769 | /* mmp.c */ |
3770 | extern void ext4_stop_mmpd(struct ext4_sb_info *sbi); | |
3771 | ||
c93d8f88 EB |
3772 | /* verity.c */ |
3773 | extern const struct fsverity_operations ext4_verityops; | |
3774 | ||
25c6d98f JK |
3775 | /* orphan.c */ |
3776 | extern int ext4_orphan_add(handle_t *, struct inode *); | |
3777 | extern int ext4_orphan_del(handle_t *, struct inode *); | |
3778 | extern void ext4_orphan_cleanup(struct super_block *sb, | |
3779 | struct ext4_super_block *es); | |
02f310fc JK |
3780 | extern void ext4_release_orphan_info(struct super_block *sb); |
3781 | extern int ext4_init_orphan_info(struct super_block *sb); | |
3782 | extern int ext4_orphan_file_empty(struct super_block *sb); | |
3783 | extern void ext4_orphan_file_block_trigger( | |
3784 | struct jbd2_buffer_trigger_type *triggers, | |
3785 | struct buffer_head *bh, | |
3786 | void *data, size_t size); | |
25c6d98f | 3787 | |
2ccb5fb9 | 3788 | /* |
48fc7f7e | 3789 | * Add new method to test whether block and inode bitmaps are properly |
2ccb5fb9 AK |
3790 | * initialized. With uninit_bg reading the block from disk is not enough |
3791 | * to mark the bitmap uptodate. We need to also zero-out the bitmap | |
3792 | */ | |
3793 | #define BH_BITMAP_UPTODATE BH_JBDPrivateStart | |
3794 | ||
3795 | static inline int bitmap_uptodate(struct buffer_head *bh) | |
3796 | { | |
3797 | return (buffer_uptodate(bh) && | |
3798 | test_bit(BH_BITMAP_UPTODATE, &(bh)->b_state)); | |
3799 | } | |
3800 | static inline void set_bitmap_uptodate(struct buffer_head *bh) | |
3801 | { | |
3802 | set_bit(BH_BITMAP_UPTODATE, &(bh)->b_state); | |
3803 | } | |
3804 | ||
731eb1a0 AM |
3805 | #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) |
3806 | ||
e9e3bcec ES |
3807 | /* For ioend & aio unwritten conversion wait queues */ |
3808 | #define EXT4_WQ_HASH_SZ 37 | |
3809 | #define ext4_ioend_wq(v) (&ext4__ioend_wq[((unsigned long)(v)) %\ | |
3810 | EXT4_WQ_HASH_SZ]) | |
e9e3bcec | 3811 | extern wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; |
e9e3bcec | 3812 | |
8f82f840 | 3813 | extern int ext4_resize_begin(struct super_block *sb); |
827891a3 | 3814 | extern int ext4_resize_end(struct super_block *sb, bool update_backups); |
8f82f840 | 3815 | |
74c66bcb JK |
3816 | static inline void ext4_set_io_unwritten_flag(struct inode *inode, |
3817 | struct ext4_io_end *io_end) | |
3818 | { | |
3819 | if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { | |
3820 | io_end->flag |= EXT4_IO_END_UNWRITTEN; | |
3821 | atomic_inc(&EXT4_I(inode)->i_unwritten); | |
3822 | } | |
3823 | } | |
3824 | ||
3825 | static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end) | |
3826 | { | |
3827 | struct inode *inode = io_end->inode; | |
3828 | ||
3829 | if (io_end->flag & EXT4_IO_END_UNWRITTEN) { | |
3830 | io_end->flag &= ~EXT4_IO_END_UNWRITTEN; | |
3831 | /* Wake up anyone waiting on unwritten extent conversion */ | |
3832 | if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) | |
3833 | wake_up_all(ext4_ioend_wq(inode)); | |
3834 | } | |
3835 | } | |
3836 | ||
8ff6daa1 | 3837 | extern const struct iomap_ops ext4_iomap_ops; |
8cd115bd | 3838 | extern const struct iomap_ops ext4_iomap_overwrite_ops; |
09edf4d3 | 3839 | extern const struct iomap_ops ext4_iomap_report_ops; |
364443cb | 3840 | |
7963e5ac Z |
3841 | static inline int ext4_buffer_uptodate(struct buffer_head *bh) |
3842 | { | |
3843 | /* | |
3844 | * If the buffer has the write error flag, we have failed | |
3845 | * to write out data in the block. In this case, we don't | |
3846 | * have to read the block because we may read the old data | |
3847 | * successfully. | |
3848 | */ | |
5c680150 | 3849 | if (buffer_write_io_error(bh)) |
7963e5ac Z |
3850 | set_buffer_uptodate(bh); |
3851 | return buffer_uptodate(bh); | |
3852 | } | |
3853 | ||
ac27a0ec DK |
3854 | #endif /* __KERNEL__ */ |
3855 | ||
6a797d27 DW |
3856 | #define EFSBADCRC EBADMSG /* Bad CRC detected */ |
3857 | #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ | |
3858 | ||
3dcf5451 | 3859 | #endif /* _EXT4_H */ |