projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ext4: Rename i_dir_acl to i_size_high
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / ext4_fs.h
CommitLineData
ac27a0ec 1/*
617ba13b 2 * linux/include/linux/ext4_fs.h
ac27a0ec
DK		 3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *
9 * from
10 *
11 * linux/include/linux/minix_fs.h
12 *
13 * Copyright (C) 1991, 1992 Linus Torvalds
14 */
15
617ba13b
MC		 16#ifndef _LINUX_EXT4_FS_H
17#define _LINUX_EXT4_FS_H
ac27a0ec
DK		 18
19#include <linux/types.h>
3a5b2ecd 20#include <linux/blkdev.h>
ac27a0ec
DK		 21#include <linux/magic.h>
22
23/*
24 * The second extended filesystem constants/structures
25 */
26
27/*
617ba13b 28 * Define EXT4FS_DEBUG to produce debug messages
ac27a0ec 29 */
617ba13b 30#undef EXT4FS_DEBUG
ac27a0ec
DK		 31
32/*
617ba13b 33 * Define EXT4_RESERVATION to reserve data blocks for expanding files
ac27a0ec 34 */
8c55e204 35#define EXT4_DEFAULT_RESERVE_BLOCKS 8
ac27a0ec 36/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
8c55e204 37#define EXT4_MAX_RESERVE_BLOCKS 1027
617ba13b 38#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0
ac27a0ec
DK		 39
40/*
41 * Debug code
42 */
617ba13b
MC		 43#ifdef EXT4FS_DEBUG
44#define ext4_debug(f, a...) \
ac27a0ec 45 do { \
617ba13b 46 printk (KERN_DEBUG "EXT4-fs DEBUG (%s, %d): %s:", \
ac27a0ec
DK		 47 __FILE__, __LINE__, __FUNCTION__); \
48 printk (KERN_DEBUG f, ## a); \
49 } while (0)
50#else
617ba13b 51#define ext4_debug(f, a...) do {} while (0)
ac27a0ec
DK		 52#endif
53
54/*
55 * Special inodes numbers
56 */
617ba13b
MC		 57#define EXT4_BAD_INO 1 /* Bad blocks inode */
58#define EXT4_ROOT_INO 2 /* Root inode */
59#define EXT4_BOOT_LOADER_INO 5 /* Boot loader inode */
60#define EXT4_UNDEL_DIR_INO 6 /* Undelete directory inode */
61#define EXT4_RESIZE_INO 7 /* Reserved group descriptors inode */
62#define EXT4_JOURNAL_INO 8 /* Journal inode */
ac27a0ec 63
617ba13b
MC		 64/* First non-reserved inode for old ext4 filesystems */
65#define EXT4_GOOD_OLD_FIRST_INO 11
ac27a0ec
DK		 66
67/*
68 * Maximal count of links to a file
69 */
f8628a14 70#define EXT4_LINK_MAX 65000
ac27a0ec
DK		 71
72/*
73 * Macro-instructions used to manage several block sizes
74 */
617ba13b 75#define EXT4_MIN_BLOCK_SIZE 1024
afc7cbca
TS		 76#define EXT4_MAX_BLOCK_SIZE 65536
77#define EXT4_MIN_BLOCK_LOG_SIZE 10
ac27a0ec 78#ifdef __KERNEL__
617ba13b 79# define EXT4_BLOCK_SIZE(s) ((s)->s_blocksize)
ac27a0ec 80#else
617ba13b 81# define EXT4_BLOCK_SIZE(s) (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
ac27a0ec 82#endif
617ba13b 83#define EXT4_ADDR_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / sizeof (__u32))
ac27a0ec 84#ifdef __KERNEL__
617ba13b 85# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
ac27a0ec 86#else
617ba13b 87# define EXT4_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
ac27a0ec
DK		 88#endif
89#ifdef __KERNEL__
617ba13b
MC		 90#define EXT4_ADDR_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_addr_per_block_bits)
91#define EXT4_INODE_SIZE(s) (EXT4_SB(s)->s_inode_size)
92#define EXT4_FIRST_INO(s) (EXT4_SB(s)->s_first_ino)
ac27a0ec 93#else
617ba13b
MC		 94#define EXT4_INODE_SIZE(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
95 EXT4_GOOD_OLD_INODE_SIZE : \
ac27a0ec 96 (s)->s_inode_size)
617ba13b
MC		 97#define EXT4_FIRST_INO(s) (((s)->s_rev_level == EXT4_GOOD_OLD_REV) ? \
98 EXT4_GOOD_OLD_FIRST_INO : \
ac27a0ec
DK		 99 (s)->s_first_ino)
100#endif
a2df2a63 101#define EXT4_BLOCK_ALIGN(size, blkbits) ALIGN((size), (1 << (blkbits)))
ac27a0ec 102
ac27a0ec
DK		 103/*
104 * Structure of a blocks group descriptor
105 */
617ba13b 106struct ext4_group_desc
ac27a0ec 107{
3a14589c 108 __le32 bg_block_bitmap_lo; /* Blocks bitmap block */
5272f837
AK		 109 __le32 bg_inode_bitmap_lo; /* Inodes bitmap block */
110 __le32 bg_inode_table_lo; /* Inodes table block */
ac27a0ec
DK		 111 __le16 bg_free_blocks_count; /* Free blocks count */
112 __le16 bg_free_inodes_count; /* Free inodes count */
113 __le16 bg_used_dirs_count; /* Directories count */
717d50e4
AD		 114 __le16 bg_flags; /* EXT4_BG_flags (INODE_UNINIT, etc) */
115 __u32 bg_reserved[2]; /* Likely block/inode bitmap checksum */
116 __le16 bg_itable_unused; /* Unused inodes count */
117 __le16 bg_checksum; /* crc16(sb_uuid+group+desc) */
8fadc143
AR		 118 __le32 bg_block_bitmap_hi; /* Blocks bitmap block MSB */
119 __le32 bg_inode_bitmap_hi; /* Inodes bitmap block MSB */
120 __le32 bg_inode_table_hi; /* Inodes table block MSB */
ac27a0ec
DK		 121};
122
717d50e4
AD		 123#define EXT4_BG_INODE_UNINIT 0x0001 /* Inode table/bitmap not in use */
124#define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */
125#define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */
126
bd81d8ee
LV		 127#ifdef __KERNEL__
128#include <linux/ext4_fs_i.h>
129#include <linux/ext4_fs_sb.h>
130#endif
ac27a0ec
DK		 131/*
132 * Macro-instructions used to manage group descriptors
133 */
0d1ee42f 134#define EXT4_MIN_DESC_SIZE 32
8fadc143 135#define EXT4_MIN_DESC_SIZE_64BIT 64
0d1ee42f
AR		 136#define EXT4_MAX_DESC_SIZE EXT4_MIN_BLOCK_SIZE
137#define EXT4_DESC_SIZE(s) (EXT4_SB(s)->s_desc_size)
ac27a0ec 138#ifdef __KERNEL__
617ba13b
MC		 139# define EXT4_BLOCKS_PER_GROUP(s) (EXT4_SB(s)->s_blocks_per_group)
140# define EXT4_DESC_PER_BLOCK(s) (EXT4_SB(s)->s_desc_per_block)
141# define EXT4_INODES_PER_GROUP(s) (EXT4_SB(s)->s_inodes_per_group)
142# define EXT4_DESC_PER_BLOCK_BITS(s) (EXT4_SB(s)->s_desc_per_block_bits)
ac27a0ec 143#else
617ba13b 144# define EXT4_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
0d1ee42f 145# define EXT4_DESC_PER_BLOCK(s) (EXT4_BLOCK_SIZE(s) / EXT4_DESC_SIZE(s))
617ba13b 146# define EXT4_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
ac27a0ec
DK		 147#endif
148
149/*
150 * Constants relative to the data blocks
151 */
617ba13b
MC		 152#define EXT4_NDIR_BLOCKS 12
153#define EXT4_IND_BLOCK EXT4_NDIR_BLOCKS
154#define EXT4_DIND_BLOCK (EXT4_IND_BLOCK + 1)
155#define EXT4_TIND_BLOCK (EXT4_DIND_BLOCK + 1)
156#define EXT4_N_BLOCKS (EXT4_TIND_BLOCK + 1)
ac27a0ec
DK		 157
158/*
159 * Inode flags
160 */
617ba13b
MC		 161#define EXT4_SECRM_FL 0x00000001 /* Secure deletion */
162#define EXT4_UNRM_FL 0x00000002 /* Undelete */
163#define EXT4_COMPR_FL 0x00000004 /* Compress file */
164#define EXT4_SYNC_FL 0x00000008 /* Synchronous updates */
165#define EXT4_IMMUTABLE_FL 0x00000010 /* Immutable file */
166#define EXT4_APPEND_FL 0x00000020 /* writes to file may only append */
167#define EXT4_NODUMP_FL 0x00000040 /* do not dump file */
168#define EXT4_NOATIME_FL 0x00000080 /* do not update atime */
ac27a0ec 169/* Reserved for compression usage... */
617ba13b
MC		 170#define EXT4_DIRTY_FL 0x00000100
171#define EXT4_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
172#define EXT4_NOCOMPR_FL 0x00000400 /* Don't compress */
173#define EXT4_ECOMPR_FL 0x00000800 /* Compression error */
ac27a0ec 174/* End compression flags --- maybe not all used */
617ba13b
MC		 175#define EXT4_INDEX_FL 0x00001000 /* hash-indexed directory */
176#define EXT4_IMAGIC_FL 0x00002000 /* AFS directory */
177#define EXT4_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
178#define EXT4_NOTAIL_FL 0x00008000 /* file tail should not be merged */
179#define EXT4_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
180#define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
181#define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */
a86c6181 182#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */
ac27a0ec 183
a86c6181 184#define EXT4_FL_USER_VISIBLE 0x000BDFFF /* User visible flags */
617ba13b 185#define EXT4_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
ac27a0ec
DK		 186
187/*
188 * Inode dynamic state flags
189 */
617ba13b
MC		 190#define EXT4_STATE_JDATA 0x00000001 /* journaled data exists */
191#define EXT4_STATE_NEW 0x00000002 /* inode is newly created */
192#define EXT4_STATE_XATTR 0x00000004 /* has in-inode xattrs */
6dd4ee7c 193#define EXT4_STATE_NO_EXPAND 0x00000008 /* No space for expansion */
ac27a0ec
DK		 194
195/* Used to pass group descriptor data when online resize is done */
617ba13b 196struct ext4_new_group_input {
8c55e204
DK		 197 __u32 group; /* Group number for this data */
198 __u64 block_bitmap; /* Absolute block number of block bitmap */
199 __u64 inode_bitmap; /* Absolute block number of inode bitmap */
200 __u64 inode_table; /* Absolute block number of inode table start */
201 __u32 blocks_count; /* Total number of blocks in this group */
202 __u16 reserved_blocks; /* Number of reserved blocks in this group */
ac27a0ec
DK		 203 __u16 unused;
204};
205
617ba13b
MC		 206/* The struct ext4_new_group_input in kernel space, with free_blocks_count */
207struct ext4_new_group_data {
ac27a0ec 208 __u32 group;
bd81d8ee
LV		 209 __u64 block_bitmap;
210 __u64 inode_bitmap;
211 __u64 inode_table;
ac27a0ec
DK		 212 __u32 blocks_count;
213 __u16 reserved_blocks;
214 __u16 unused;
215 __u32 free_blocks_count;
216};
217
a2df2a63
AA		 218/*
219 * Following is used by preallocation code to tell get_blocks() that we
220 * want uninitialzed extents.
221 */
222#define EXT4_CREATE_UNINITIALIZED_EXT 2
ac27a0ec
DK		 223
224/*
225 * ioctl commands
226 */
617ba13b
MC		 227#define EXT4_IOC_GETFLAGS FS_IOC_GETFLAGS
228#define EXT4_IOC_SETFLAGS FS_IOC_SETFLAGS
229#define EXT4_IOC_GETVERSION _IOR('f', 3, long)
230#define EXT4_IOC_SETVERSION _IOW('f', 4, long)
231#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long)
232#define EXT4_IOC_GROUP_ADD _IOW('f', 8,struct ext4_new_group_input)
233#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION
234#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION
e23291b9 235#ifdef CONFIG_JBD2_DEBUG
617ba13b 236#define EXT4_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
ac27a0ec 237#endif
617ba13b
MC		 238#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long)
239#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long)
ac27a0ec
DK		 240
241/*
242 * ioctl commands in 32 bit emulation
243 */
617ba13b
MC		 244#define EXT4_IOC32_GETFLAGS FS_IOC32_GETFLAGS
245#define EXT4_IOC32_SETFLAGS FS_IOC32_SETFLAGS
246#define EXT4_IOC32_GETVERSION _IOR('f', 3, int)
247#define EXT4_IOC32_SETVERSION _IOW('f', 4, int)
248#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int)
249#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int)
250#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int)
e23291b9 251#ifdef CONFIG_JBD2_DEBUG
617ba13b 252#define EXT4_IOC32_WAIT_FOR_READONLY _IOR('f', 99, int)
ac27a0ec 253#endif
617ba13b
MC		 254#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
255#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION
ac27a0ec
DK		 256
257
258/*
259 * Mount options
260 */
617ba13b 261struct ext4_mount_options {
ac27a0ec
DK		 262 unsigned long s_mount_opt;
263 uid_t s_resuid;
264 gid_t s_resgid;
265 unsigned long s_commit_interval;
266#ifdef CONFIG_QUOTA
267 int s_jquota_fmt;
268 char *s_qf_names[MAXQUOTAS];
269#endif
270};
271
272/*
273 * Structure of an inode on the disk
274 */
617ba13b 275struct ext4_inode {
ac27a0ec
DK		 276 __le16 i_mode; /* File mode */
277 __le16 i_uid; /* Low 16 bits of Owner Uid */
a48380f7 278 __le32 i_size_lo; /* Size in bytes */
ac27a0ec 279 __le32 i_atime; /* Access time */
ef7f3835 280 __le32 i_ctime; /* Inode Change time */
ac27a0ec
DK		 281 __le32 i_mtime; /* Modification time */
282 __le32 i_dtime; /* Deletion Time */
283 __le16 i_gid; /* Low 16 bits of Group Id */
284 __le16 i_links_count; /* Links count */
285 __le32 i_blocks; /* Blocks count */
286 __le32 i_flags; /* File flags */
287 union {
288 struct {
289 __u32 l_i_reserved1;
290 } linux1;
291 struct {
292 __u32 h_i_translator;
293 } hurd1;
294 struct {
295 __u32 m_i_reserved1;
296 } masix1;
297 } osd1; /* OS dependent 1 */
617ba13b 298 __le32 i_block[EXT4_N_BLOCKS];/* Pointers to blocks */
ac27a0ec 299 __le32 i_generation; /* File version (for NFS) */
7973c0c1 300 __le32 i_file_acl_lo; /* File ACL */
a48380f7 301 __le32 i_size_high;
f077d0d7 302 __le32 i_obso_faddr; /* Obsoleted fragment address */
ac27a0ec
DK		 303 union {
304 struct {
f077d0d7 305 __le16 l_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */
a1ddeb7e 306 __le16 l_i_file_acl_high;
8c55e204 307 __le16 l_i_uid_high; /* these 2 fields */
ac27a0ec
DK		 308 __le16 l_i_gid_high; /* were reserved2[0] */
309 __u32 l_i_reserved2;
310 } linux2;
311 struct {
f077d0d7 312 __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */
ac27a0ec
DK		 313 __u16 h_i_mode_high;
314 __u16 h_i_uid_high;
315 __u16 h_i_gid_high;
316 __u32 h_i_author;
317 } hurd2;
318 struct {
f077d0d7 319 __le16 h_i_reserved1; /* Obsoleted fragment number/size which are removed in ext4 */
a1ddeb7e 320 __le16 m_i_file_acl_high;
ac27a0ec
DK		 321 __u32 m_i_reserved2[2];
322 } masix2;
323 } osd2; /* OS dependent 2 */
324 __le16 i_extra_isize;
325 __le16 i_pad1;
ef7f3835
KS		 326 __le32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */
327 __le32 i_mtime_extra; /* extra Modification time(nsec << 2 | epoch) */
328 __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */
329 __le32 i_crtime; /* File Creation time */
330 __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
ac27a0ec
DK		 331};
332
ac27a0ec 333
ef7f3835
KS		 334#define EXT4_EPOCH_BITS 2
335#define EXT4_EPOCH_MASK ((1 << EXT4_EPOCH_BITS) - 1)
336#define EXT4_NSEC_MASK (~0UL << EXT4_EPOCH_BITS)
337
338/*
339 * Extended fields will fit into an inode if the filesystem was formatted
340 * with large inodes (-I 256 or larger) and there are not currently any EAs
341 * consuming all of the available space. For new inodes we always reserve
342 * enough space for the kernel's known extended fields, but for inodes
343 * created with an old kernel this might not have been the case. None of
344 * the extended inode fields is critical for correct filesystem operation.
345 * This macro checks if a certain field fits in the inode. Note that
346 * inode-size = GOOD_OLD_INODE_SIZE + i_extra_isize
347 */
348#define EXT4_FITS_IN_INODE(ext4_inode, einode, field) \
349 ((offsetof(typeof(*ext4_inode), field) + \
350 sizeof((ext4_inode)->field)) \
351 <= (EXT4_GOOD_OLD_INODE_SIZE + \
352 (einode)->i_extra_isize)) \
353
354static inline __le32 ext4_encode_extra_time(struct timespec *time)
355{
356 return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
357 time->tv_sec >> 32 : 0) |
358 ((time->tv_nsec << 2) & EXT4_NSEC_MASK));
359}
360
361static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
362{
363 if (sizeof(time->tv_sec) > 4)
364 time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
365 << 32;
366 time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2;
367}
368
369#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
370do { \
371 (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
372 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \
373 (raw_inode)->xtime ## _extra = \
374 ext4_encode_extra_time(&(inode)->xtime); \
375} while (0)
376
377#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \
378do { \
379 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
380 (raw_inode)->xtime = cpu_to_le32((einode)->xtime.tv_sec); \
381 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
382 (raw_inode)->xtime ## _extra = \
383 ext4_encode_extra_time(&(einode)->xtime); \
384} while (0)
385
386#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode) \
387do { \
388 (inode)->xtime.tv_sec = (signed)le32_to_cpu((raw_inode)->xtime); \
389 if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \
390 ext4_decode_extra_time(&(inode)->xtime, \
391 raw_inode->xtime ## _extra); \
392} while (0)
393
394#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \
395do { \
396 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime)) \
397 (einode)->xtime.tv_sec = \
398 (signed)le32_to_cpu((raw_inode)->xtime); \
399 if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \
400 ext4_decode_extra_time(&(einode)->xtime, \
401 raw_inode->xtime ## _extra); \
402} while (0)
403
ac27a0ec
DK		 404#if defined(__KERNEL__) || defined(__linux__)
405#define i_reserved1 osd1.linux1.l_i_reserved1
a1ddeb7e 406#define i_file_acl_high osd2.linux2.l_i_file_acl_high
ac27a0ec
DK		 407#define i_uid_low i_uid
408#define i_gid_low i_gid
409#define i_uid_high osd2.linux2.l_i_uid_high
410#define i_gid_high osd2.linux2.l_i_gid_high
411#define i_reserved2 osd2.linux2.l_i_reserved2
412
413#elif defined(__GNU__)
414
415#define i_translator osd1.hurd1.h_i_translator
ac27a0ec
DK		 416#define i_uid_high osd2.hurd2.h_i_uid_high
417#define i_gid_high osd2.hurd2.h_i_gid_high
418#define i_author osd2.hurd2.h_i_author
419
420#elif defined(__masix__)
421
422#define i_reserved1 osd1.masix1.m_i_reserved1
a1ddeb7e 423#define i_file_acl_high osd2.masix2.m_i_file_acl_high
ac27a0ec
DK		 424#define i_reserved2 osd2.masix2.m_i_reserved2
425
426#endif /* defined(__KERNEL__) || defined(__linux__) */
427
428/*
429 * File system states
430 */
617ba13b
MC		 431#define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */
432#define EXT4_ERROR_FS 0x0002 /* Errors detected */
433#define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */
ac27a0ec
DK		 434
435/*
436 * Mount flags
437 */
617ba13b
MC		 438#define EXT4_MOUNT_CHECK 0x00001 /* Do mount-time checks */
439#define EXT4_MOUNT_OLDALLOC 0x00002 /* Don't use the new Orlov allocator */
440#define EXT4_MOUNT_GRPID 0x00004 /* Create files with directory's group */
441#define EXT4_MOUNT_DEBUG 0x00008 /* Some debugging messages */
442#define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */
443#define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */
444#define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */
445#define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */
446#define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/
447#define EXT4_MOUNT_ABORT 0x00200 /* Fatal error detected */
448#define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */
449#define EXT4_MOUNT_JOURNAL_DATA 0x00400 /* Write data to journal */
450#define EXT4_MOUNT_ORDERED_DATA 0x00800 /* Flush data before commit */
451#define EXT4_MOUNT_WRITEBACK_DATA 0x00C00 /* No data ordering */
452#define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */
453#define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */
454#define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */
455#define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */
456#define EXT4_MOUNT_RESERVATION 0x10000 /* Preallocation */
457#define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */
458#define EXT4_MOUNT_NOBH 0x40000 /* No bufferheads */
459#define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */
460#define EXT4_MOUNT_USRQUOTA 0x100000 /* "old" user quota */
461#define EXT4_MOUNT_GRPQUOTA 0x200000 /* "old" group quota */
a86c6181 462#define EXT4_MOUNT_EXTENTS 0x400000 /* Extents support */
617ba13b
MC		 463
464/* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */
ac27a0ec 465#ifndef _LINUX_EXT2_FS_H
617ba13b
MC		 466#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt
467#define set_opt(o, opt) o |= EXT4_MOUNT_##opt
468#define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \
469 EXT4_MOUNT_##opt)
ac27a0ec 470#else
617ba13b
MC		 471#define EXT2_MOUNT_NOLOAD EXT4_MOUNT_NOLOAD
472#define EXT2_MOUNT_ABORT EXT4_MOUNT_ABORT
473#define EXT2_MOUNT_DATA_FLAGS EXT4_MOUNT_DATA_FLAGS
ac27a0ec
DK		 474#endif
475
617ba13b
MC		 476#define ext4_set_bit ext2_set_bit
477#define ext4_set_bit_atomic ext2_set_bit_atomic
478#define ext4_clear_bit ext2_clear_bit
479#define ext4_clear_bit_atomic ext2_clear_bit_atomic
480#define ext4_test_bit ext2_test_bit
481#define ext4_find_first_zero_bit ext2_find_first_zero_bit
482#define ext4_find_next_zero_bit ext2_find_next_zero_bit
ac27a0ec
DK		 483
484/*
485 * Maximal mount counts between two filesystem checks
486 */
617ba13b
MC		 487#define EXT4_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
488#define EXT4_DFL_CHECKINTERVAL 0 /* Don't use interval check */
ac27a0ec
DK		 489
490/*
491 * Behaviour when detecting errors
492 */
617ba13b
MC		 493#define EXT4_ERRORS_CONTINUE 1 /* Continue execution */
494#define EXT4_ERRORS_RO 2 /* Remount fs read-only */
495#define EXT4_ERRORS_PANIC 3 /* Panic */
496#define EXT4_ERRORS_DEFAULT EXT4_ERRORS_CONTINUE
ac27a0ec
DK		 497
498/*
499 * Structure of the super block
500 */
617ba13b 501struct ext4_super_block {
ac27a0ec 502/*00*/ __le32 s_inodes_count; /* Inodes count */
6bc9feff 503 __le32 s_blocks_count_lo; /* Blocks count */
308ba3ec
AK		 504 __le32 s_r_blocks_count_lo; /* Reserved blocks count */
505 __le32 s_free_blocks_count_lo; /* Free blocks count */
ac27a0ec
DK		 506/*10*/ __le32 s_free_inodes_count; /* Free inodes count */
507 __le32 s_first_data_block; /* First Data Block */
508 __le32 s_log_block_size; /* Block size */
f077d0d7 509 __le32 s_obso_log_frag_size; /* Obsoleted fragment size */
ac27a0ec 510/*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
f077d0d7 511 __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */
ac27a0ec
DK		 512 __le32 s_inodes_per_group; /* # Inodes per group */
513 __le32 s_mtime; /* Mount time */
514/*30*/ __le32 s_wtime; /* Write time */
515 __le16 s_mnt_count; /* Mount count */
516 __le16 s_max_mnt_count; /* Maximal mount count */
517 __le16 s_magic; /* Magic signature */
518 __le16 s_state; /* File system state */
519 __le16 s_errors; /* Behaviour when detecting errors */
520 __le16 s_minor_rev_level; /* minor revision level */
521/*40*/ __le32 s_lastcheck; /* time of last check */
522 __le32 s_checkinterval; /* max. time between checks */
523 __le32 s_creator_os; /* OS */
524 __le32 s_rev_level; /* Revision level */
525/*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
526 __le16 s_def_resgid; /* Default gid for reserved blocks */
527 /*
617ba13b 528 * These fields are for EXT4_DYNAMIC_REV superblocks only.
ac27a0ec
DK		 529 *
530 * Note: the difference between the compatible feature set and
531 * the incompatible feature set is that if there is a bit set
532 * in the incompatible feature set that the kernel doesn't
533 * know about, it should refuse to mount the filesystem.
534 *
535 * e2fsck's requirements are more strict; if it doesn't know
536 * about a feature in either the compatible or incompatible
537 * feature set, it must abort and not try to meddle with
538 * things it doesn't understand...
539 */
540 __le32 s_first_ino; /* First non-reserved inode */
0d1ee42f 541 __le16 s_inode_size; /* size of inode structure */
ac27a0ec
DK		 542 __le16 s_block_group_nr; /* block group # of this superblock */
543 __le32 s_feature_compat; /* compatible feature set */
544/*60*/ __le32 s_feature_incompat; /* incompatible feature set */
545 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
546/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
547/*78*/ char s_volume_name[16]; /* volume name */
548/*88*/ char s_last_mounted[64]; /* directory where last mounted */
549/*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
550 /*
551 * Performance hints. Directory preallocation should only
617ba13b 552 * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
ac27a0ec
DK		 553 */
554 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
555 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
556 __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
557 /*
617ba13b 558 * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
ac27a0ec
DK		 559 */
560/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
561/*E0*/ __le32 s_journal_inum; /* inode number of journal file */
562 __le32 s_journal_dev; /* device number of journal file */
563 __le32 s_last_orphan; /* start of list of inodes to delete */
564 __le32 s_hash_seed[4]; /* HTREE hash seed */
565 __u8 s_def_hash_version; /* Default hash version to use */
566 __u8 s_reserved_char_pad;
0d1ee42f 567 __le16 s_desc_size; /* size of group descriptor */
bd81d8ee 568/*100*/ __le32 s_default_mount_opts;
ac27a0ec 569 __le32 s_first_meta_bg; /* First metablock block group */
bd81d8ee
LV		 570 __le32 s_mkfs_time; /* When the filesystem was created */
571 __le32 s_jnl_blocks[17]; /* Backup of the journal inode */
572 /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
573/*150*/ __le32 s_blocks_count_hi; /* Blocks count */
574 __le32 s_r_blocks_count_hi; /* Reserved blocks count */
575 __le32 s_free_blocks_count_hi; /* Free blocks count */
c1bddad9
AK		 576 __le16 s_min_extra_isize; /* All inodes have at least # bytes */
577 __le16 s_want_extra_isize; /* New inodes should reserve # bytes */
578 __le32 s_flags; /* Miscellaneous flags */
579 __le16 s_raid_stride; /* RAID stride */
580 __le16 s_mmp_interval; /* # seconds to wait in MMP checking */
581 __le64 s_mmp_block; /* Block for multi-mount protection */
582 __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
436bd75e 583 __u32 s_reserved[163]; /* Padding to the end of the block */
ac27a0ec
DK		 584};
585
586#ifdef __KERNEL__
617ba13b 587static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb)
ac27a0ec
DK		 588{
589 return sb->s_fs_info;
590}
617ba13b 591static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
ac27a0ec 592{
617ba13b 593 return container_of(inode, struct ext4_inode_info, vfs_inode);
ac27a0ec
DK		 594}
595
ef7f3835
KS		 596static inline struct timespec ext4_current_time(struct inode *inode)
597{
598 return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
599 current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
600}
601
602
617ba13b 603static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
ac27a0ec 604{
617ba13b
MC		 605 return ino == EXT4_ROOT_INO ||
606 ino == EXT4_JOURNAL_INO ||
607 ino == EXT4_RESIZE_INO ||
608 (ino >= EXT4_FIRST_INO(sb) &&
609 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
ac27a0ec
DK		 610}
611#else
617ba13b 612/* Assume that user mode programs are passing in an ext4fs superblock, not
ac27a0ec
DK		 613 * a kernel struct super_block. This will allow us to call the feature-test
614 * macros from user land. */
617ba13b 615#define EXT4_SB(sb) (sb)
ac27a0ec
DK		 616#endif
617
617ba13b 618#define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
ac27a0ec
DK		 619
620/*
621 * Codes for operating systems
622 */
617ba13b
MC		 623#define EXT4_OS_LINUX 0
624#define EXT4_OS_HURD 1
625#define EXT4_OS_MASIX 2
626#define EXT4_OS_FREEBSD 3
627#define EXT4_OS_LITES 4
ac27a0ec
DK		 628
629/*
630 * Revision levels
631 */
617ba13b
MC		 632#define EXT4_GOOD_OLD_REV 0 /* The good old (original) format */
633#define EXT4_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
ac27a0ec 634
617ba13b
MC		 635#define EXT4_CURRENT_REV EXT4_GOOD_OLD_REV
636#define EXT4_MAX_SUPP_REV EXT4_DYNAMIC_REV
ac27a0ec 637
617ba13b 638#define EXT4_GOOD_OLD_INODE_SIZE 128
ac27a0ec
DK		 639
640/*
641 * Feature set definitions
642 */
643
617ba13b
MC		 644#define EXT4_HAS_COMPAT_FEATURE(sb,mask) \
645 ( EXT4_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
646#define EXT4_HAS_RO_COMPAT_FEATURE(sb,mask) \
647 ( EXT4_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
648#define EXT4_HAS_INCOMPAT_FEATURE(sb,mask) \
649 ( EXT4_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
650#define EXT4_SET_COMPAT_FEATURE(sb,mask) \
651 EXT4_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
652#define EXT4_SET_RO_COMPAT_FEATURE(sb,mask) \
653 EXT4_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
654#define EXT4_SET_INCOMPAT_FEATURE(sb,mask) \
655 EXT4_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
656#define EXT4_CLEAR_COMPAT_FEATURE(sb,mask) \
657 EXT4_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
658#define EXT4_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
659 EXT4_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
660#define EXT4_CLEAR_INCOMPAT_FEATURE(sb,mask) \
661 EXT4_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
662
663#define EXT4_FEATURE_COMPAT_DIR_PREALLOC 0x0001
664#define EXT4_FEATURE_COMPAT_IMAGIC_INODES 0x0002
665#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
666#define EXT4_FEATURE_COMPAT_EXT_ATTR 0x0008
667#define EXT4_FEATURE_COMPAT_RESIZE_INODE 0x0010
668#define EXT4_FEATURE_COMPAT_DIR_INDEX 0x0020
669
670#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
671#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
672#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
717d50e4 673#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
f8628a14 674#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
ef7f3835 675#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
617ba13b
MC		 676
677#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
678#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
679#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
680#define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
681#define EXT4_FEATURE_INCOMPAT_META_BG 0x0010
a86c6181 682#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* extents support */
bd81d8ee 683#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
ce421581 684#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
617ba13b
MC		 685
686#define EXT4_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
687#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \
688 EXT4_FEATURE_INCOMPAT_RECOVER| \
a86c6181 689 EXT4_FEATURE_INCOMPAT_META_BG| \
bd81d8ee 690 EXT4_FEATURE_INCOMPAT_EXTENTS| \
ce421581
JS		 691 EXT4_FEATURE_INCOMPAT_64BIT| \
692 EXT4_FEATURE_INCOMPAT_FLEX_BG)
617ba13b
MC		 693#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
694 EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
717d50e4 695 EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
f8628a14 696 EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
ef7f3835 697 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
617ba13b 698 EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
ac27a0ec
DK		 699
700/*
701 * Default values for user and/or group using reserved blocks
702 */
617ba13b
MC		 703#define EXT4_DEF_RESUID 0
704#define EXT4_DEF_RESGID 0
ac27a0ec
DK		 705
706/*
707 * Default mount options
708 */
617ba13b
MC		 709#define EXT4_DEFM_DEBUG 0x0001
710#define EXT4_DEFM_BSDGROUPS 0x0002
711#define EXT4_DEFM_XATTR_USER 0x0004
712#define EXT4_DEFM_ACL 0x0008
713#define EXT4_DEFM_UID16 0x0010
714#define EXT4_DEFM_JMODE 0x0060
715#define EXT4_DEFM_JMODE_DATA 0x0020
716#define EXT4_DEFM_JMODE_ORDERED 0x0040
717#define EXT4_DEFM_JMODE_WBACK 0x0060
ac27a0ec
DK		 718
719/*
720 * Structure of a directory entry
721 */
617ba13b 722#define EXT4_NAME_LEN 255
ac27a0ec 723
617ba13b 724struct ext4_dir_entry {
ac27a0ec
DK		 725 __le32 inode; /* Inode number */
726 __le16 rec_len; /* Directory entry length */
727 __le16 name_len; /* Name length */
617ba13b 728 char name[EXT4_NAME_LEN]; /* File name */
ac27a0ec
DK		 729};
730
731/*
617ba13b 732 * The new version of the directory entry. Since EXT4 structures are
ac27a0ec
DK		 733 * stored in intel byte order, and the name_len field could never be
734 * bigger than 255 chars, it's safe to reclaim the extra byte for the
735 * file_type field.
736 */
617ba13b 737struct ext4_dir_entry_2 {
ac27a0ec
DK		 738 __le32 inode; /* Inode number */
739 __le16 rec_len; /* Directory entry length */
740 __u8 name_len; /* Name length */
741 __u8 file_type;
617ba13b 742 char name[EXT4_NAME_LEN]; /* File name */
ac27a0ec
DK		 743};
744
745/*
617ba13b 746 * Ext4 directory file types. Only the low 3 bits are used. The
ac27a0ec
DK		 747 * other bits are reserved for now.
748 */
617ba13b
MC		 749#define EXT4_FT_UNKNOWN 0
750#define EXT4_FT_REG_FILE 1
751#define EXT4_FT_DIR 2
752#define EXT4_FT_CHRDEV 3
753#define EXT4_FT_BLKDEV 4
754#define EXT4_FT_FIFO 5
755#define EXT4_FT_SOCK 6
756#define EXT4_FT_SYMLINK 7
ac27a0ec 757
617ba13b 758#define EXT4_FT_MAX 8
ac27a0ec
DK		 759
760/*
617ba13b 761 * EXT4_DIR_PAD defines the directory entries boundaries
ac27a0ec
DK		 762 *
763 * NOTE: It must be a multiple of 4
764 */
617ba13b
MC		 765#define EXT4_DIR_PAD 4
766#define EXT4_DIR_ROUND (EXT4_DIR_PAD - 1)
767#define EXT4_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT4_DIR_ROUND) & \
768 ~EXT4_DIR_ROUND)
a72d7f83
JK		 769#define EXT4_MAX_REC_LEN ((1<<16)-1)
770
771static inline unsigned ext4_rec_len_from_disk(__le16 dlen)
772{
773 unsigned len = le16_to_cpu(dlen);
774
775 if (len == EXT4_MAX_REC_LEN)
776 return 1 << 16;
777 return len;
778}
779
780static inline __le16 ext4_rec_len_to_disk(unsigned len)
781{
782 if (len == (1 << 16))
783 return cpu_to_le16(EXT4_MAX_REC_LEN);
784 else if (len > (1 << 16))
785 BUG();
786 return cpu_to_le16(len);
787}
788
ac27a0ec
DK		 789/*
790 * Hash Tree Directory indexing
791 * (c) Daniel Phillips, 2001
792 */
793
4074fe37
ES		 794#define is_dx(dir) (EXT4_HAS_COMPAT_FEATURE(dir->i_sb, \
795 EXT4_FEATURE_COMPAT_DIR_INDEX) && \
617ba13b
MC		 796 (EXT4_I(dir)->i_flags & EXT4_INDEX_FL))
797#define EXT4_DIR_LINK_MAX(dir) (!is_dx(dir) && (dir)->i_nlink >= EXT4_LINK_MAX)
798#define EXT4_DIR_LINK_EMPTY(dir) ((dir)->i_nlink == 2 || (dir)->i_nlink == 1)
ac27a0ec
DK		 799
800/* Legal values for the dx_root hash_version field: */
801
802#define DX_HASH_LEGACY 0
803#define DX_HASH_HALF_MD4 1
804#define DX_HASH_TEA 2
805
806#ifdef __KERNEL__
807
808/* hash info structure used by the directory hash */
809struct dx_hash_info
810{
811 u32 hash;
812 u32 minor_hash;
813 int hash_version;
814 u32 *seed;
815};
816
617ba13b 817#define EXT4_HTREE_EOF 0x7fffffff
ac27a0ec
DK		 818
819/*
617ba13b 820 * Control parameters used by ext4_htree_next_block
ac27a0ec
DK		 821 */
822#define HASH_NB_ALWAYS 1
823
824
825/*
826 * Describe an inode's exact location on disk and in memory
827 */
617ba13b 828struct ext4_iloc
ac27a0ec
DK		 829{
830 struct buffer_head *bh;
831 unsigned long offset;
fd2d4291 832 ext4_group_t block_group;
ac27a0ec
DK		 833};
834
617ba13b 835static inline struct ext4_inode *ext4_raw_inode(struct ext4_iloc *iloc)
ac27a0ec 836{
617ba13b 837 return (struct ext4_inode *) (iloc->bh->b_data + iloc->offset);
ac27a0ec
DK		 838}
839
840/*
841 * This structure is stuffed into the struct file's private_data field
842 * for directories. It is where we put information so that we can do
843 * readdir operations in hash tree order.
844 */
845struct dir_private_info {
846 struct rb_root root;
847 struct rb_node *curr_node;
848 struct fname *extra_fname;
849 loff_t last_pos;
850 __u32 curr_hash;
851 __u32 curr_minor_hash;
852 __u32 next_hash;
853};
854
855/* calculate the first block number of the group */
617ba13b 856static inline ext4_fsblk_t
fd2d4291 857ext4_group_first_block_no(struct super_block *sb, ext4_group_t group_no)
ac27a0ec 858{
617ba13b
MC		 859 return group_no * (ext4_fsblk_t)EXT4_BLOCKS_PER_GROUP(sb) +
860 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
ac27a0ec
DK		 861}
862
863/*
864 * Special error return code only used by dx_probe() and its callers.
865 */
866#define ERR_BAD_DX_DIR -75000
867
72b64b59
AM		 868void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
869 unsigned long *blockgrpp, ext4_grpblk_t *offsetp);
3a5b2ecd 870
ac27a0ec
DK		 871/*
872 * Function prototypes
873 */
874
875/*
876 * Ok, these declarations are also in <linux/kernel.h> but none of the
617ba13b 877 * ext4 source programs needs to include it so they are duplicated here.
ac27a0ec 878 */
8c55e204
DK		 879# define NORET_TYPE /**/
880# define ATTRIB_NORET __attribute__((noreturn))
881# define NORET_AND noreturn,
ac27a0ec
DK		 882
883/* balloc.c */
3a5b2ecd
MC		 884extern unsigned int ext4_block_group(struct super_block *sb,
885 ext4_fsblk_t blocknr);
886extern ext4_grpblk_t ext4_block_group_offset(struct super_block *sb,
887 ext4_fsblk_t blocknr);
fd2d4291
AM		 888extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
889extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
890 ext4_group_t group);
617ba13b
MC		 891extern ext4_fsblk_t ext4_new_block (handle_t *handle, struct inode *inode,
892 ext4_fsblk_t goal, int *errp);
893extern ext4_fsblk_t ext4_new_blocks (handle_t *handle, struct inode *inode,
894 ext4_fsblk_t goal, unsigned long *count, int *errp);
1d03ec98
AK		 895extern ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
896 ext4_fsblk_t goal, unsigned long *count, int *errp);
617ba13b
MC		 897extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
898 ext4_fsblk_t block, unsigned long count);
899extern void ext4_free_blocks_sb (handle_t *handle, struct super_block *sb,
900 ext4_fsblk_t block, unsigned long count,
ac27a0ec 901 unsigned long *pdquot_freed_blocks);
617ba13b
MC		 902extern ext4_fsblk_t ext4_count_free_blocks (struct super_block *);
903extern void ext4_check_blocks_bitmap (struct super_block *);
904extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
fd2d4291 905 ext4_group_t block_group,
ac27a0ec 906 struct buffer_head ** bh);
617ba13b
MC		 907extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
908extern void ext4_init_block_alloc_info(struct inode *);
909extern void ext4_rsv_window_add(struct super_block *sb, struct ext4_reserve_window_node *rsv);
ac27a0ec
DK		 910
911/* dir.c */
617ba13b
MC		 912extern int ext4_check_dir_entry(const char *, struct inode *,
913 struct ext4_dir_entry_2 *,
ac27a0ec 914 struct buffer_head *, unsigned long);
617ba13b 915extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
ac27a0ec 916 __u32 minor_hash,
617ba13b
MC		 917 struct ext4_dir_entry_2 *dirent);
918extern void ext4_htree_free_dir_info(struct dir_private_info *p);
ac27a0ec
DK		 919
920/* fsync.c */
617ba13b 921extern int ext4_sync_file (struct file *, struct dentry *, int);
ac27a0ec
DK		 922
923/* hash.c */
617ba13b 924extern int ext4fs_dirhash(const char *name, int len, struct
ac27a0ec
DK		 925 dx_hash_info *hinfo);
926
927/* ialloc.c */
617ba13b
MC		 928extern struct inode * ext4_new_inode (handle_t *, struct inode *, int);
929extern void ext4_free_inode (handle_t *, struct inode *);
930extern struct inode * ext4_orphan_get (struct super_block *, unsigned long);
931extern unsigned long ext4_count_free_inodes (struct super_block *);
932extern unsigned long ext4_count_dirs (struct super_block *);
933extern void ext4_check_inodes_bitmap (struct super_block *);
934extern unsigned long ext4_count_free (struct buffer_head *, unsigned);
ac27a0ec
DK		 935
936
937/* inode.c */
617ba13b
MC		 938int ext4_forget(handle_t *handle, int is_metadata, struct inode *inode,
939 struct buffer_head *bh, ext4_fsblk_t blocknr);
725d26d3
AK		 940struct buffer_head *ext4_getblk(handle_t *, struct inode *,
941 ext4_lblk_t, int, int *);
942struct buffer_head *ext4_bread(handle_t *, struct inode *,
943 ext4_lblk_t, int, int *);
617ba13b 944int ext4_get_blocks_handle(handle_t *handle, struct inode *inode,
725d26d3
AK		 945 ext4_lblk_t iblock, unsigned long maxblocks,
946 struct buffer_head *bh_result,
947 int create, int extend_disksize);
ac27a0ec 948
617ba13b
MC		 949extern void ext4_read_inode (struct inode *);
950extern int ext4_write_inode (struct inode *, int);
951extern int ext4_setattr (struct dentry *, struct iattr *);
952extern void ext4_delete_inode (struct inode *);
953extern int ext4_sync_inode (handle_t *, struct inode *);
954extern void ext4_discard_reservation (struct inode *);
955extern void ext4_dirty_inode(struct inode *);
956extern int ext4_change_inode_journal_flag(struct inode *, int);
957extern int ext4_get_inode_loc(struct inode *, struct ext4_iloc *);
958extern void ext4_truncate (struct inode *);
959extern void ext4_set_inode_flags(struct inode *);
ff9ddf7e 960extern void ext4_get_inode_flags(struct ext4_inode_info *);
617ba13b 961extern void ext4_set_aops(struct inode *inode);
a86c6181
AT		 962extern int ext4_writepage_trans_blocks(struct inode *);
963extern int ext4_block_truncate_page(handle_t *handle, struct page *page,
964 struct address_space *mapping, loff_t from);
ac27a0ec
DK		 965
966/* ioctl.c */
617ba13b 967extern int ext4_ioctl (struct inode *, struct file *, unsigned int,
ac27a0ec 968 unsigned long);
617ba13b 969extern long ext4_compat_ioctl (struct file *, unsigned int, unsigned long);
ac27a0ec
DK		 970
971/* namei.c */
617ba13b
MC		 972extern int ext4_orphan_add(handle_t *, struct inode *);
973extern int ext4_orphan_del(handle_t *, struct inode *);
974extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
ac27a0ec
DK		 975 __u32 start_minor_hash, __u32 *next_hash);
976
977/* resize.c */
617ba13b
MC		 978extern int ext4_group_add(struct super_block *sb,
979 struct ext4_new_group_data *input);
980extern int ext4_group_extend(struct super_block *sb,
981 struct ext4_super_block *es,
982 ext4_fsblk_t n_blocks_count);
ac27a0ec
DK		 983
984/* super.c */
617ba13b 985extern void ext4_error (struct super_block *, const char *, const char *, ...)
ac27a0ec 986 __attribute__ ((format (printf, 3, 4)));
617ba13b
MC		 987extern void __ext4_std_error (struct super_block *, const char *, int);
988extern void ext4_abort (struct super_block *, const char *, const char *, ...)
ac27a0ec 989 __attribute__ ((format (printf, 3, 4)));
617ba13b 990extern void ext4_warning (struct super_block *, const char *, const char *, ...)
ac27a0ec 991 __attribute__ ((format (printf, 3, 4)));
617ba13b 992extern void ext4_update_dynamic_rev (struct super_block *sb);
99e6f829
AK		 993extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
994 __u32 compat);
995extern int ext4_update_rocompat_feature(handle_t *handle,
996 struct super_block *sb, __u32 rocompat);
997extern int ext4_update_incompat_feature(handle_t *handle,
998 struct super_block *sb, __u32 incompat);
8fadc143
AR		 999extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
1000 struct ext4_group_desc *bg);
1001extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
1002 struct ext4_group_desc *bg);
1003extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
1004 struct ext4_group_desc *bg);
1005extern void ext4_block_bitmap_set(struct super_block *sb,
1006 struct ext4_group_desc *bg, ext4_fsblk_t blk);
1007extern void ext4_inode_bitmap_set(struct super_block *sb,
1008 struct ext4_group_desc *bg, ext4_fsblk_t blk);
1009extern void ext4_inode_table_set(struct super_block *sb,
1010 struct ext4_group_desc *bg, ext4_fsblk_t blk);
bd81d8ee
LV		 1011
1012static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
1013{
1014 return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
6bc9feff 1015 le32_to_cpu(es->s_blocks_count_lo);
bd81d8ee
LV		 1016}
1017
1018static inline ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
1019{
1020 return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
308ba3ec 1021 le32_to_cpu(es->s_r_blocks_count_lo);
bd81d8ee
LV		 1022}
1023
1024static inline ext4_fsblk_t ext4_free_blocks_count(struct ext4_super_block *es)
1025{
1026 return ((ext4_fsblk_t)le32_to_cpu(es->s_free_blocks_count_hi) << 32) |
308ba3ec 1027 le32_to_cpu(es->s_free_blocks_count_lo);
bd81d8ee
LV		 1028}
1029
1030static inline void ext4_blocks_count_set(struct ext4_super_block *es,
1031 ext4_fsblk_t blk)
1032{
6bc9feff 1033 es->s_blocks_count_lo = cpu_to_le32((u32)blk);
bd81d8ee
LV		 1034 es->s_blocks_count_hi = cpu_to_le32(blk >> 32);
1035}
1036
1037static inline void ext4_free_blocks_count_set(struct ext4_super_block *es,
1038 ext4_fsblk_t blk)
1039{
308ba3ec 1040 es->s_free_blocks_count_lo = cpu_to_le32((u32)blk);
bd81d8ee
LV		 1041 es->s_free_blocks_count_hi = cpu_to_le32(blk >> 32);
1042}
1043
1044static inline void ext4_r_blocks_count_set(struct ext4_super_block *es,
1045 ext4_fsblk_t blk)
1046{
308ba3ec 1047 es->s_r_blocks_count_lo = cpu_to_le32((u32)blk);
bd81d8ee
LV		 1048 es->s_r_blocks_count_hi = cpu_to_le32(blk >> 32);
1049}
1050
a48380f7
AK		 1051static inline loff_t ext4_isize(struct ext4_inode *raw_inode)
1052{
1053 return ((loff_t)le32_to_cpu(raw_inode->i_size_high) << 32) |
1054 le32_to_cpu(raw_inode->i_size_lo);
1055}
bd81d8ee 1056
a48380f7
AK		 1057static inline void ext4_isize_set(struct ext4_inode *raw_inode, loff_t i_size)
1058{
1059 raw_inode->i_size_lo = cpu_to_le32(i_size);
1060 raw_inode->i_size_high = cpu_to_le32(i_size >> 32);
1061}
ac27a0ec 1062
617ba13b 1063#define ext4_std_error(sb, errno) \
ac27a0ec
DK		 1064do { \
1065 if ((errno)) \
617ba13b 1066 __ext4_std_error((sb), __FUNCTION__, (errno)); \
ac27a0ec
DK		 1067} while (0)
1068
1069/*
1070 * Inodes and files operations
1071 */
1072
1073/* dir.c */
617ba13b 1074extern const struct file_operations ext4_dir_operations;
ac27a0ec
DK		 1075
1076/* file.c */
c5ef1c42 1077extern const struct inode_operations ext4_file_inode_operations;
617ba13b 1078extern const struct file_operations ext4_file_operations;
ac27a0ec
DK		 1079
1080/* namei.c */
c5ef1c42
AV		 1081extern const struct inode_operations ext4_dir_inode_operations;
1082extern const struct inode_operations ext4_special_inode_operations;
ac27a0ec
DK		 1083
1084/* symlink.c */
c5ef1c42
AV		 1085extern const struct inode_operations ext4_symlink_inode_operations;
1086extern const struct inode_operations ext4_fast_symlink_inode_operations;
ac27a0ec 1087
a86c6181
AT		 1088/* extents.c */
1089extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
1090extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
1091extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
725d26d3 1092 ext4_lblk_t iblock,
a86c6181
AT		 1093 unsigned long max_blocks, struct buffer_head *bh_result,
1094 int create, int extend_disksize);
1095extern void ext4_ext_truncate(struct inode *, struct page *);
1096extern void ext4_ext_init(struct super_block *);
1097extern void ext4_ext_release(struct super_block *);
a2df2a63
AA		 1098extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset,
1099 loff_t len);
a86c6181
AT		 1100static inline int
1101ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block,
1102 unsigned long max_blocks, struct buffer_head *bh,
1103 int create, int extend_disksize)
1104{
725d26d3
AK		 1105 int retval;
1106 if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {
1107 retval = ext4_ext_get_blocks(handle, inode,
1108 (ext4_lblk_t)block, max_blocks,
1109 bh, create, extend_disksize);
1110 } else {
1111 retval = ext4_get_blocks_handle(handle, inode,
1112 (ext4_lblk_t)block, max_blocks,
1113 bh, create, extend_disksize);
1114 }
1115 return retval;
a86c6181
AT		 1116}
1117
ac27a0ec
DK		 1118
1119#endif /* __KERNEL__ */
1120
617ba13b 1121#endif /* _LINUX_EXT4_FS_H */
kernel source for telekom puls (alcatel/mediatek)