ext4.h revision 8642b7fba54727a38f751516bcdc452fb09ef610 
1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ****************************************************************************
11 ****************************************************************************/
12#ifndef _EXT4_H
13#define _EXT4_H
14
15#include <sys/types.h>
16
17#undef EXT4FS_DEBUG
18
19#ifdef EXT4FS_DEBUG
20#define ext4_debug(f, a...)   do {   printk(KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:",   __FILE__, __LINE__, __func__);   printk(KERN_DEBUG f, ## a);   } while (0)
21#else
22#define ext4_debug(f, a...) do {} while (0)
23#endif
24
25#define EXT4_ERROR_INODE(inode, fmt, a...)   ext4_error_inode(__func__, (inode), (fmt), ## a);
26
27#define EXT4_ERROR_FILE(file, fmt, a...)   ext4_error_file(__func__, (file), (fmt), ## a);
28
29typedef int ext4_grpblk_t;
30
31typedef unsigned long long ext4_fsblk_t;
32
33typedef __u32 ext4_lblk_t;
34
35typedef unsigned int ext4_group_t;
36
37#define EXT4_MB_HINT_MERGE 0x0001
38
39#define EXT4_MB_HINT_RESERVED 0x0002
40
41#define EXT4_MB_HINT_METADATA 0x0004
42
43#define EXT4_MB_HINT_FIRST 0x0008
44
45#define EXT4_MB_HINT_BEST 0x0010
46
47#define EXT4_MB_HINT_DATA 0x0020
48
49#define EXT4_MB_HINT_NOPREALLOC 0x0040
50
51#define EXT4_MB_HINT_GROUP_ALLOC 0x0080
52
53#define EXT4_MB_HINT_GOAL_ONLY 0x0100
54
55#define EXT4_MB_HINT_TRY_GOAL 0x0200
56
57#define EXT4_MB_DELALLOC_RESERVED 0x0400
58
59#define EXT4_MB_STREAM_ALLOC 0x0800
60
61struct ext4_allocation_request {
62
63 struct inode *inode;
64
65 unsigned int len;
66
67 ext4_lblk_t logical;
68
69 ext4_lblk_t lleft;
70
71 ext4_lblk_t lright;
72
73 ext4_fsblk_t goal;
74
75 ext4_fsblk_t pleft;
76
77 ext4_fsblk_t pright;
78
79 unsigned int flags;
80};
81
82#define EXT4_BAD_INO 1
83#define EXT4_ROOT_INO 2
84#define EXT4_BOOT_LOADER_INO 5
85#define EXT4_UNDEL_DIR_INO 6
86#define EXT4_RESIZE_INO 7
87#define EXT4_JOURNAL_INO 8
88
89#define EXT4_GOOD_OLD_FIRST_INO 11
90
91#define EXT4_LINK_MAX 65000
92
93#define EXT4_MIN_BLOCK_SIZE 1024
94#define EXT4_MAX_BLOCK_SIZE 65536
95#define EXT4_MIN_BLOCK_LOG_SIZE 10
96#define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
97#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
98#define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
99#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ?   EXT4_GOOD_OLD_INODE_SIZE :   (s)->s_inode_size)
100#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ?   EXT4_GOOD_OLD_FIRST_INO :   (s)->s_first_ino)
101#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
102
103struct ext4_group_desc
104{
105 __le32 bg_block_bitmap_lo;
106 __le32 bg_inode_bitmap_lo;
107 __le32 bg_inode_table_lo;
108 __le16 bg_free_blocks_count_lo;
109 __le16 bg_free_inodes_count_lo;
110 __le16 bg_used_dirs_count_lo;
111 __le16 bg_flags;
112 __u32 bg_reserved[2];
113 __le16 bg_itable_unused_lo;
114 __le16 bg_checksum;
115 __le32 bg_block_bitmap_hi;
116 __le32 bg_inode_bitmap_hi;
117 __le32 bg_inode_table_hi;
118 __le16 bg_free_blocks_count_hi;
119 __le16 bg_free_inodes_count_hi;
120 __le16 bg_used_dirs_count_hi;
121 __le16 bg_itable_unused_hi;
122 __u32 bg_reserved2[3];
123};
124
125#define EXT4_BG_INODE_UNINIT 0x0001
126#define EXT4_BG_BLOCK_UNINIT 0x0002
127#define EXT4_BG_INODE_ZEROED 0x0004
128
129#define EXT4_MIN_DESC_SIZE 32
130#define EXT4_MIN_DESC_SIZE_64BIT 64
131#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
132#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
133#define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
134#define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
135#define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
136
137#define EXT4_NDIR_BLOCKS 12
138#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
139#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
140#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
141#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
142
143#define EXT4_SECRM_FL 0x00000001
144#define EXT4_UNRM_FL 0x00000002
145#define EXT4_COMPR_FL 0x00000004
146#define EXT4_SYNC_FL 0x00000008
147#define EXT4_IMMUTABLE_FL 0x00000010
148#define EXT4_APPEND_FL 0x00000020
149#define EXT4_NODUMP_FL 0x00000040
150#define EXT4_NOATIME_FL 0x00000080
151
152#define EXT4_DIRTY_FL 0x00000100
153#define EXT4_COMPRBLK_FL 0x00000200
154#define EXT4_NOCOMPR_FL 0x00000400
155#define EXT4_ECOMPR_FL 0x00000800
156
157#define EXT4_INDEX_FL 0x00001000
158#define EXT4_IMAGIC_FL 0x00002000
159#define EXT4_JOURNAL_DATA_FL 0x00004000
160#define EXT4_NOTAIL_FL 0x00008000
161#define EXT4_DIRSYNC_FL 0x00010000
162#define EXT4_TOPDIR_FL 0x00020000
163#define EXT4_HUGE_FILE_FL 0x00040000
164#define EXT4_EXTENTS_FL 0x00080000
165#define EXT4_EA_INODE_FL 0x00200000
166#define EXT4_EOFBLOCKS_FL 0x00400000
167#define EXT4_RESERVED_FL 0x80000000
168
169#define EXT4_FL_USER_VISIBLE 0x004BDFFF
170#define EXT4_FL_USER_MODIFIABLE 0x004B80FF
171
172#define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |  EXT4_SYNC_FL | EXT4_IMMUTABLE_FL | EXT4_APPEND_FL |  EXT4_NODUMP_FL | EXT4_NOATIME_FL |  EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |  EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
173
174#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
175
176#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
177
178struct ext4_new_group_data {
179 __u32 group;
180 __u64 block_bitmap;
181 __u64 inode_bitmap;
182 __u64 inode_table;
183 __u32 blocks_count;
184 __u16 reserved_blocks;
185 __u16 unused;
186 __u32 free_blocks_count;
187};
188
189#define EXT4_GET_BLOCKS_CREATE 0x0001
190
191#define EXT4_GET_BLOCKS_UNINIT_EXT 0x0002
192#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|  EXT4_GET_BLOCKS_CREATE)
193
194#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004
195
196#define EXT4_GET_BLOCKS_PRE_IO 0x0008
197#define EXT4_GET_BLOCKS_CONVERT 0x0010
198#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|  EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
199
200#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|  EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
201
202#define EXT4_FREE_BLOCKS_METADATA 0x0001
203#define EXT4_FREE_BLOCKS_FORGET 0x0002
204#define EXT4_FREE_BLOCKS_VALIDATED 0x0004
205
206#define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS
207#define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS
208#define EXT4_IOC_GETVERSION _IOR('f', 3, long)
209#define EXT4_IOC_SETVERSION _IOW('f', 4, long)
210#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
211#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
212#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
213#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
214#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
215#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input)
216#define EXT4_IOC_MIGRATE _IO('f', 9)
217
218#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12)
219#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
220
221#define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS
222#define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS
223#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
224#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
225#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
226#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
227#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
228#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
229#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
230
231#define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF
232
233struct ext4_inode {
234 __le16 i_mode;
235 __le16 i_uid;
236 __le32 i_size_lo;
237 __le32 i_atime;
238 __le32 i_ctime;
239 __le32 i_mtime;
240 __le32 i_dtime;
241 __le16 i_gid;
242 __le16 i_links_count;
243 __le32 i_blocks_lo;
244 __le32 i_flags;
245 union {
246 struct {
247 __le32 l_i_version;
248 } linux1;
249 struct {
250 __u32 h_i_translator;
251 } hurd1;
252 struct {
253 __u32 m_i_reserved1;
254 } masix1;
255 } osd1;
256 __le32 i_block[EXT4_N_BLOCKS];
257 __le32 i_generation;
258 __le32 i_file_acl_lo;
259 __le32 i_size_high;
260 __le32 i_obso_faddr;
261 union {
262 struct {
263 __le16 l_i_blocks_high;
264 __le16 l_i_file_acl_high;
265 __le16 l_i_uid_high;
266 __le16 l_i_gid_high;
267 __u32 l_i_reserved2;
268 } linux2;
269 struct {
270 __le16 h_i_reserved1;
271 __u16 h_i_mode_high;
272 __u16 h_i_uid_high;
273 __u16 h_i_gid_high;
274 __u32 h_i_author;
275 } hurd2;
276 struct {
277 __le16 h_i_reserved1;
278 __le16 m_i_file_acl_high;
279 __u32 m_i_reserved2[2];
280 } masix2;
281 } osd2;
282 __le16 i_extra_isize;
283 __le16 i_pad1;
284 __le32 i_ctime_extra;
285 __le32 i_mtime_extra;
286 __le32 i_atime_extra;
287 __le32 i_crtime;
288 __le32 i_crtime_extra;
289 __le32 i_version_hi;
290};
291
292struct move_extent {
293 __u32 reserved;
294 __u32 donor_fd;
295 __u64 orig_start;
296 __u64 donor_start;
297 __u64 len;
298 __u64 moved_len;
299};
300
301#define EXT4_EPOCH_BITS 2
302#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
303#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
304
305#define EXT4_FITS_IN_INODE(ext4_inode, einode, field)   ((offsetof(typeof(*ext4_inode), field) +   sizeof((ext4_inode)->field))   <= (EXT4_GOOD_OLD_INODE_SIZE +   (einode)->i_extra_isize))
306#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode)  do {   (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec);   if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))   (raw_inode)->xtime ## _extra =   ext4_encode_extra_time(&(inode)->xtime);  } while (0)
307#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode)  do {   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))   (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec);   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))   (raw_inode)->xtime ## _extra =   ext4_encode_extra_time(&(einode)->xtime);  } while (0)
308#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode)  do {   (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime);   if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))   ext4_decode_extra_time(&(inode)->xtime,   raw_inode->xtime ## _extra);  } while (0)
309#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode)  do {   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))   (einode)->xtime.tv_sec =   (signed)le32_to_cpu((raw_inode)->xtime);   if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))   ext4_decode_extra_time(&(einode)->xtime,   raw_inode->xtime ## _extra);  } while (0)
310#define i_disk_version osd1.linux1.l_i_version
311
312#define i_reserved1 osd1.linux1.l_i_reserved1
313#define i_file_acl_high osd2.linux2.l_i_file_acl_high
314#define i_blocks_high osd2.linux2.l_i_blocks_high
315#define i_uid_low i_uid
316#define i_gid_low i_gid
317#define i_uid_high osd2.linux2.l_i_uid_high
318#define i_gid_high osd2.linux2.l_i_gid_high
319#define i_reserved2 osd2.linux2.l_i_reserved2
320
321#define EXT4_VALID_FS 0x0001
322#define EXT4_ERROR_FS 0x0002
323#define EXT4_ORPHAN_FS 0x0004
324
325#define EXT2_FLAGS_SIGNED_HASH 0x0001
326#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
327#define EXT2_FLAGS_TEST_FILESYS 0x0004
328
329#define EXT4_MOUNT_OLDALLOC 0x00002
330#define EXT4_MOUNT_GRPID 0x00004
331#define EXT4_MOUNT_DEBUG 0x00008
332#define EXT4_MOUNT_ERRORS_CONT 0x00010
333#define EXT4_MOUNT_ERRORS_RO 0x00020
334#define EXT4_MOUNT_ERRORS_PANIC 0x00040
335#define EXT4_MOUNT_MINIX_DF 0x00080
336#define EXT4_MOUNT_NOLOAD 0x00100
337#define EXT4_MOUNT_DATA_FLAGS 0x00C00
338#define EXT4_MOUNT_JOURNAL_DATA 0x00400
339#define EXT4_MOUNT_ORDERED_DATA 0x00800
340#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00
341#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000
342#define EXT4_MOUNT_NO_UID32 0x02000
343#define EXT4_MOUNT_XATTR_USER 0x04000
344#define EXT4_MOUNT_POSIX_ACL 0x08000
345#define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000
346#define EXT4_MOUNT_BARRIER 0x20000
347#define EXT4_MOUNT_NOBH 0x40000
348#define EXT4_MOUNT_QUOTA 0x80000
349#define EXT4_MOUNT_USRQUOTA 0x100000
350#define EXT4_MOUNT_GRPQUOTA 0x200000
351#define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000
352#define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000
353#define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000
354#define EXT4_MOUNT_I_VERSION 0x2000000
355#define EXT4_MOUNT_DELALLOC 0x8000000
356#define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000
357#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000
358#define EXT4_MOUNT_DISCARD 0x40000000
359
360#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt
361#define set_opt(o, opt) o |= EXT4_MOUNT_##opt
362#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt &   EXT4_MOUNT_##opt)
363
364#define ext4_set_bit ext2_set_bit
365#define ext4_set_bit_atomic ext2_set_bit_atomic
366#define ext4_clear_bit ext2_clear_bit
367#define ext4_clear_bit_atomic ext2_clear_bit_atomic
368#define ext4_test_bit ext2_test_bit
369#define ext4_find_first_zero_bit ext2_find_first_zero_bit
370#define ext4_find_next_zero_bit ext2_find_next_zero_bit
371#define ext4_find_next_bit ext2_find_next_bit
372
373#define EXT4_DFL_MAX_MNT_COUNT 20
374#define EXT4_DFL_CHECKINTERVAL 0
375
376#define EXT4_ERRORS_CONTINUE 1
377#define EXT4_ERRORS_RO 2
378#define EXT4_ERRORS_PANIC 3
379#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
380
381struct ext4_super_block {
382  __le32 s_inodes_count;
383 __le32 s_blocks_count_lo;
384 __le32 s_r_blocks_count_lo;
385 __le32 s_free_blocks_count_lo;
386  __le32 s_free_inodes_count;
387 __le32 s_first_data_block;
388 __le32 s_log_block_size;
389 __le32 s_obso_log_frag_size;
390  __le32 s_blocks_per_group;
391 __le32 s_obso_frags_per_group;
392 __le32 s_inodes_per_group;
393 __le32 s_mtime;
394  __le32 s_wtime;
395 __le16 s_mnt_count;
396 __le16 s_max_mnt_count;
397 __le16 s_magic;
398 __le16 s_state;
399 __le16 s_errors;
400 __le16 s_minor_rev_level;
401  __le32 s_lastcheck;
402 __le32 s_checkinterval;
403 __le32 s_creator_os;
404 __le32 s_rev_level;
405  __le16 s_def_resuid;
406 __le16 s_def_resgid;
407
408 __le32 s_first_ino;
409 __le16 s_inode_size;
410 __le16 s_block_group_nr;
411 __le32 s_feature_compat;
412  __le32 s_feature_incompat;
413 __le32 s_feature_ro_compat;
414  __u8 s_uuid[16];
415  char s_volume_name[16];
416  char s_last_mounted[64];
417  __le32 s_algorithm_usage_bitmap;
418
419 __u8 s_prealloc_blocks;
420 __u8 s_prealloc_dir_blocks;
421 __le16 s_reserved_gdt_blocks;
422
423  __u8 s_journal_uuid[16];
424  __le32 s_journal_inum;
425 __le32 s_journal_dev;
426 __le32 s_last_orphan;
427 __le32 s_hash_seed[4];
428 __u8 s_def_hash_version;
429 __u8 s_reserved_char_pad;
430 __le16 s_desc_size;
431  __le32 s_default_mount_opts;
432 __le32 s_first_meta_bg;
433 __le32 s_mkfs_time;
434 __le32 s_jnl_blocks[17];
435
436  __le32 s_blocks_count_hi;
437 __le32 s_r_blocks_count_hi;
438 __le32 s_free_blocks_count_hi;
439 __le16 s_min_extra_isize;
440 __le16 s_want_extra_isize;
441 __le32 s_flags;
442 __le16 s_raid_stride;
443 __le16 s_mmp_interval;
444 __le64 s_mmp_block;
445 __le32 s_raid_stripe_width;
446 __u8 s_log_groups_per_flex;
447 __u8 s_reserved_char_pad2;
448 __le16 s_reserved_pad;
449 __le64 s_kbytes_written;
450 __u32 s_reserved[160];
451};
452
453#define EXT4_SB(sb) (sb)
454
455#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
456
457#define EXT4_OS_LINUX 0
458#define EXT4_OS_HURD 1
459#define EXT4_OS_MASIX 2
460#define EXT4_OS_FREEBSD 3
461#define EXT4_OS_LITES 4
462
463#define EXT4_GOOD_OLD_REV 0
464#define EXT4_DYNAMIC_REV 1
465
466#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV
467#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
468
469#define EXT4_GOOD_OLD_INODE_SIZE 128
470
471#define EXT4_HAS_COMPAT_FEATURE(sb,mask)   ((EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask)) != 0)
472#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask)   ((EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask)) != 0)
473#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask)   ((EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask)) != 0)
474#define EXT4_SET_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
475#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
476#define EXT4_SET_INCOMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
477#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
478#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
479#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask)   EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
480
481#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
482#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
483#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
484#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
485#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
486#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
487
488#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
489#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
490#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
491#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008
492#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
493#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
494#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
495
496#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
497#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
498#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004
499#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
500#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
501#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
502#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
503#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
504#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
505#define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400
506#define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000
507
508#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
509#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE|   EXT4_FEATURE_INCOMPAT_RECOVER|   EXT4_FEATURE_INCOMPAT_META_BG|   EXT4_FEATURE_INCOMPAT_EXTENTS|   EXT4_FEATURE_INCOMPAT_64BIT|   EXT4_FEATURE_INCOMPAT_FLEX_BG)
510#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER|   EXT4_FEATURE_RO_COMPAT_LARGE_FILE|   EXT4_FEATURE_RO_COMPAT_GDT_CSUM|   EXT4_FEATURE_RO_COMPAT_DIR_NLINK |   EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE |   EXT4_FEATURE_RO_COMPAT_BTREE_DIR |  EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
511
512#define EXT4_DEF_RESUID 0
513#define EXT4_DEF_RESGID 0
514
515#define EXT4_DEF_INODE_READAHEAD_BLKS 32
516
517#define EXT4_DEFM_DEBUG 0x0001
518#define EXT4_DEFM_BSDGROUPS 0x0002
519#define EXT4_DEFM_XATTR_USER 0x0004
520#define EXT4_DEFM_ACL 0x0008
521#define EXT4_DEFM_UID16 0x0010
522#define EXT4_DEFM_JMODE 0x0060
523#define EXT4_DEFM_JMODE_DATA 0x0020
524#define EXT4_DEFM_JMODE_ORDERED 0x0040
525#define EXT4_DEFM_JMODE_WBACK 0x0060
526
527#define EXT4_DEF_MIN_BATCH_TIME 0
528#define EXT4_DEF_MAX_BATCH_TIME 15000
529
530#define EXT4_FLEX_SIZE_DIR_ALLOC_SCHEME 4
531
532#define EXT4_NAME_LEN 255
533
534struct ext4_dir_entry {
535 __le32 inode;
536 __le16 rec_len;
537 __le16 name_len;
538 char name[EXT4_NAME_LEN];
539};
540
541struct ext4_dir_entry_2 {
542 __le32 inode;
543 __le16 rec_len;
544 __u8 name_len;
545 __u8 file_type;
546 char name[EXT4_NAME_LEN];
547};
548
549#define EXT4_FT_UNKNOWN 0
550#define EXT4_FT_REG_FILE 1
551#define EXT4_FT_DIR 2
552#define EXT4_FT_CHRDEV 3
553#define EXT4_FT_BLKDEV 4
554#define EXT4_FT_FIFO 5
555#define EXT4_FT_SOCK 6
556#define EXT4_FT_SYMLINK 7
557
558#define EXT4_FT_MAX 8
559
560#define EXT4_DIR_PAD 4
561#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
562#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) &   ~EXT4_DIR_ROUND)
563#define EXT4_MAX_REC_LEN ((1<<16)-1)
564
565#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb,   EXT4_FEATURE_COMPAT_DIR_INDEX) &&   (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
566#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
567#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
568
569#define DX_HASH_LEGACY 0
570#define DX_HASH_HALF_MD4 1
571#define DX_HASH_TEA 2
572#define DX_HASH_LEGACY_UNSIGNED 3
573#define DX_HASH_HALF_MD4_UNSIGNED 4
574#define DX_HASH_TEA_UNSIGNED 5
575
576#endif
577
578