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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  
29  typedef int ext4_grpblk_t;
30  
31  typedef unsigned long long ext4_fsblk_t;
32  
33  typedef __u32 ext4_lblk_t;
34  
35  typedef 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  
61  struct 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  
103  struct 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  
178  struct 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  
233  struct 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  
292  struct 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  
381  struct 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  
534  struct ext4_dir_entry {
535   __le32 inode;
536   __le16 rec_len;
537   __le16 name_len;
538   char name[EXT4_NAME_LEN];
539  };
540  
541  struct 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