f51667685749e (Theodore Ts'o 2017-12-17 22:00:59 -0500 1) // SPDX-License-Identifier: GPL-2.0
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 2) /*
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 3) File: fs/ext4/xattr.h
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 4)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 5) On-disk format of extended attributes for the ext4 filesystem.
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 6)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 7) (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org>
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 8) */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 9)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 10) #include <linux/xattr.h>
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 11)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 12) /* Magic value in attribute blocks */
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 13) #define EXT4_XATTR_MAGIC 0xEA020000
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 14)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 15) /* Maximum number of references to one attribute block */
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 16) #define EXT4_XATTR_REFCOUNT_MAX 1024
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 17)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 18) /* Name indexes */
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 19) #define EXT4_XATTR_INDEX_USER 1
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 20) #define EXT4_XATTR_INDEX_POSIX_ACL_ACCESS 2
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 21) #define EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT 3
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 22) #define EXT4_XATTR_INDEX_TRUSTED 4
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 23) #define EXT4_XATTR_INDEX_LUSTRE 5
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 24) #define EXT4_XATTR_INDEX_SECURITY 6
67cf5b09a46f7 (Tao Ma 2012-12-10 14:04:46 -0500 25) #define EXT4_XATTR_INDEX_SYSTEM 7
fd03d8daf417f (Theodore Ts'o 2013-04-18 14:53:15 -0400 26) #define EXT4_XATTR_INDEX_RICHACL 8
887e2c452255f (Michael Halcrow 2015-04-11 07:47:00 -0400 27) #define EXT4_XATTR_INDEX_ENCRYPTION 9
3980bd3b406ad (Theodore Ts'o 2016-07-31 23:38:36 -0400 28) #define EXT4_XATTR_INDEX_HURD 10 /* Reserved for Hurd */
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 29)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 30) struct ext4_xattr_header {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 31) __le32 h_magic; /* magic number for identification */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 32) __le32 h_refcount; /* reference count */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 33) __le32 h_blocks; /* number of disk blocks used */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 34) __le32 h_hash; /* hash value of all attributes */
e615391896064 (Darrick J. Wong 2012-04-29 18:23:10 -0400 35) __le32 h_checksum; /* crc32c(uuid+id+xattrblock) */
e615391896064 (Darrick J. Wong 2012-04-29 18:23:10 -0400 36) /* id = inum if refcount=1, blknum otherwise */
e615391896064 (Darrick J. Wong 2012-04-29 18:23:10 -0400 37) __u32 h_reserved[3]; /* zero right now */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 38) };
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 39)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 40) struct ext4_xattr_ibody_header {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 41) __le32 h_magic; /* magic number for identification */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 42) };
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 43)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 44) struct ext4_xattr_entry {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 45) __u8 e_name_len; /* length of name */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 46) __u8 e_name_index; /* attribute name index */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 47) __le16 e_value_offs; /* offset in disk block of value */
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 48) __le32 e_value_inum; /* inode in which the value is stored */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 49) __le32 e_value_size; /* size of attribute value */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 50) __le32 e_hash; /* hash value of name and value */
47b1030612f43 (Gustavo A. R. Silva 2020-03-09 13:08:13 -0500 51) char e_name[]; /* attribute name */
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 52) };
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 53)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 54) #define EXT4_XATTR_PAD_BITS 2
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 55) #define EXT4_XATTR_PAD (1<<EXT4_XATTR_PAD_BITS)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 56) #define EXT4_XATTR_ROUND (EXT4_XATTR_PAD-1)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 57) #define EXT4_XATTR_LEN(name_len) \
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 58) (((name_len) + EXT4_XATTR_ROUND + \
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 59) sizeof(struct ext4_xattr_entry)) & ~EXT4_XATTR_ROUND)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 60) #define EXT4_XATTR_NEXT(entry) \
af5bc92dded4d (Theodore Ts'o 2008-09-08 22:25:24 -0400 61) ((struct ext4_xattr_entry *)( \
af5bc92dded4d (Theodore Ts'o 2008-09-08 22:25:24 -0400 62) (char *)(entry) + EXT4_XATTR_LEN((entry)->e_name_len)))
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 63) #define EXT4_XATTR_SIZE(size) \
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 64) (((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 65)
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 66) #define IHDR(inode, raw_inode) \
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 67) ((struct ext4_xattr_ibody_header *) \
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 68) ((void *)raw_inode + \
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 69) EXT4_GOOD_OLD_INODE_SIZE + \
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 70) EXT4_I(inode)->i_extra_isize))
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 71) #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 72)
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 73) /*
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 74) * XATTR_SIZE_MAX is currently 64k, but for the purposes of checking
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 75) * for file system consistency errors, we use a somewhat bigger value.
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 76) * This allows XATTR_SIZE_MAX to grow in the future, but by using this
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 77) * instead of INT_MAX for certain consistency checks, we don't need to
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 78) * worry about arithmetic overflows. (Actually XATTR_SIZE_MAX is
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 79) * defined in include/uapi/linux/limits.h, so changing it is going
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 80) * not going to be trivial....)
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 81) */
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 82) #define EXT4_XATTR_SIZE_MAX (1 << 24)
54dd0e0a1b255 (Theodore Ts'o 2018-03-30 20:04:11 -0400 83)
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 84) /*
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 85) * The minimum size of EA value when you start storing it in an external inode
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 86) * size of block - size of header - size of 1 entry - 4 null bytes
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 87) */
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 88) #define EXT4_XATTR_MIN_LARGE_EA_SIZE(b) \
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 89) ((b) - EXT4_XATTR_LEN(3) - sizeof(struct ext4_xattr_header) - 4)
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 90)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 91) #define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 92) #define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 93) #define BFIRST(bh) ENTRY(BHDR(bh)+1)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 94) #define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 95)
bd9926e80330d (Theodore Ts'o 2012-12-11 03:31:49 -0500 96) #define EXT4_ZERO_XATTR_VALUE ((void *)-1)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 97)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 98) struct ext4_xattr_info {
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 99) const char *name;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 100) const void *value;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 101) size_t value_len;
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 102) int name_index;
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 103) int in_inode;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 104) };
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 105)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 106) struct ext4_xattr_search {
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 107) struct ext4_xattr_entry *first;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 108) void *base;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 109) void *end;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 110) struct ext4_xattr_entry *here;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 111) int not_found;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 112) };
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 113)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 114) struct ext4_xattr_ibody_find {
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 115) struct ext4_xattr_search s;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 116) struct ext4_iloc iloc;
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 117) };
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 118)
b6d9029df083c (Tahsin Erdogan 2017-06-22 10:28:38 -0400 119) struct ext4_xattr_inode_array {
b6d9029df083c (Tahsin Erdogan 2017-06-22 10:28:38 -0400 120) unsigned int count; /* # of used items in the array */
47b1030612f43 (Gustavo A. R. Silva 2020-03-09 13:08:13 -0500 121) struct inode *inodes[];
b6d9029df083c (Tahsin Erdogan 2017-06-22 10:28:38 -0400 122) };
b6d9029df083c (Tahsin Erdogan 2017-06-22 10:28:38 -0400 123)
11e27528076e7 (Stephen Hemminger 2010-05-13 17:53:18 -0700 124) extern const struct xattr_handler ext4_xattr_user_handler;
11e27528076e7 (Stephen Hemminger 2010-05-13 17:53:18 -0700 125) extern const struct xattr_handler ext4_xattr_trusted_handler;
11e27528076e7 (Stephen Hemminger 2010-05-13 17:53:18 -0700 126) extern const struct xattr_handler ext4_xattr_security_handler;
88ee9d571b6d8 (Jan (janneke) Nieuwenhuizen 2020-05-25 21:39:40 +0200 127) extern const struct xattr_handler ext4_xattr_hurd_handler;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 128)
887e2c452255f (Michael Halcrow 2015-04-11 07:47:00 -0400 129) #define EXT4_XATTR_NAME_ENCRYPTION_CONTEXT "c"
887e2c452255f (Michael Halcrow 2015-04-11 07:47:00 -0400 130)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 131) /*
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 132) * The EXT4_STATE_NO_EXPAND is overloaded and used for two purposes.
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 133) * The first is to signal that there the inline xattrs and data are
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 134) * taking up so much space that we might as well not keep trying to
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 135) * expand it. The second is that xattr_sem is taken for writing, so
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 136) * we shouldn't try to recurse into the inode expansion. For this
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 137) * second case, we need to make sure that we take save and restore the
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 138) * NO_EXPAND state flag appropriately.
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 139) */
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 140) static inline void ext4_write_lock_xattr(struct inode *inode, int *save)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 141) {
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 142) down_write(&EXT4_I(inode)->xattr_sem);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 143) *save = ext4_test_inode_state(inode, EXT4_STATE_NO_EXPAND);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 144) ext4_set_inode_state(inode, EXT4_STATE_NO_EXPAND);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 145) }
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 146)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 147) static inline int ext4_write_trylock_xattr(struct inode *inode, int *save)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 148) {
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 149) if (down_write_trylock(&EXT4_I(inode)->xattr_sem) == 0)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 150) return 0;
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 151) *save = ext4_test_inode_state(inode, EXT4_STATE_NO_EXPAND);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 152) ext4_set_inode_state(inode, EXT4_STATE_NO_EXPAND);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 153) return 1;
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 154) }
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 155)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 156) static inline void ext4_write_unlock_xattr(struct inode *inode, int *save)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 157) {
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 158) if (*save == 0)
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 159) ext4_clear_inode_state(inode, EXT4_STATE_NO_EXPAND);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 160) up_write(&EXT4_I(inode)->xattr_sem);
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 161) }
c755e251357a0 (Theodore Ts'o 2017-01-11 21:50:46 -0500 162)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 163) extern ssize_t ext4_listxattr(struct dentry *, char *, size_t);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 164)
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 165) extern int ext4_xattr_get(struct inode *, int, const char *, void *, size_t);
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 166) extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 167) extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
dec214d00e0d7 (Tahsin Erdogan 2017-06-22 11:44:55 -0400 168) extern int ext4_xattr_set_credits(struct inode *inode, size_t value_len,
af65207c76ce8 (Tahsin Erdogan 2017-07-06 00:01:59 -0400 169) bool is_create, int *credits);
af65207c76ce8 (Tahsin Erdogan 2017-07-06 00:01:59 -0400 170) extern int __ext4_xattr_set_credits(struct super_block *sb, struct inode *inode,
af65207c76ce8 (Tahsin Erdogan 2017-07-06 00:01:59 -0400 171) struct buffer_head *block_bh, size_t value_len,
af65207c76ce8 (Tahsin Erdogan 2017-07-06 00:01:59 -0400 172) bool is_create);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 173)
e50e5129f384a (Andreas Dilger 2017-06-21 21:10:32 -0400 174) extern int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
30a7eb970c3aa (Tahsin Erdogan 2017-06-22 11:42:09 -0400 175) struct ext4_xattr_inode_array **array,
30a7eb970c3aa (Tahsin Erdogan 2017-06-22 11:42:09 -0400 176) int extra_credits);
0421a189bc8cd (Tahsin Erdogan 2017-06-22 10:26:31 -0400 177) extern void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *array);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 178)
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 179) extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 180) struct ext4_inode *raw_inode, handle_t *handle);
6dd4ee7cab7e3 (Kalpak Shah 2007-07-18 09:19:57 -0400 181)
11e27528076e7 (Stephen Hemminger 2010-05-13 17:53:18 -0700 182) extern const struct xattr_handler *ext4_xattr_handlers[];
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 183)
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 184) extern int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 185) struct ext4_xattr_ibody_find *is);
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 186) extern int ext4_xattr_ibody_get(struct inode *inode, int name_index,
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 187) const char *name,
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 188) void *buffer, size_t buffer_size);
0d812f77b36c1 (Tao Ma 2012-12-10 14:06:02 -0500 189) extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
0d812f77b36c1 (Tao Ma 2012-12-10 14:06:02 -0500 190) struct ext4_xattr_info *i,
0d812f77b36c1 (Tao Ma 2012-12-10 14:06:02 -0500 191) struct ext4_xattr_ibody_find *is);
879b38257bf2b (Tao Ma 2012-12-05 10:28:46 -0500 192)
7a2508e1b657c (Jan Kara 2016-02-22 22:35:22 -0500 193) extern struct mb_cache *ext4_xattr_create_cache(void);
7a2508e1b657c (Jan Kara 2016-02-22 22:35:22 -0500 194) extern void ext4_xattr_destroy_cache(struct mb_cache *);
9c191f701ce9f (T Makphaibulchoke 2014-03-18 19:24:49 -0400 195)
03010a3350301 (Theodore Ts'o 2008-10-10 20:02:48 -0400 196) #ifdef CONFIG_EXT4_FS_SECURITY
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 197) extern int ext4_init_security(handle_t *handle, struct inode *inode,
2a7dba391e562 (Eric Paris 2011-02-01 11:05:39 -0500 198) struct inode *dir, const struct qstr *qstr);
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 199) #else
617ba13b31fbf (Mingming Cao 2006-10-11 01:20:53 -0700 200) static inline int ext4_init_security(handle_t *handle, struct inode *inode,
2a7dba391e562 (Eric Paris 2011-02-01 11:05:39 -0500 201) struct inode *dir, const struct qstr *qstr)
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 202) {
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 203) return 0;
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 204) }
ac27a0ec112a0 (Dave Kleikamp 2006-10-11 01:20:50 -0700 205) #endif
33d201e0277b2 (Tahsin Erdogan 2017-06-21 21:17:10 -0400 206)
33d201e0277b2 (Tahsin Erdogan 2017-06-21 21:17:10 -0400 207) #ifdef CONFIG_LOCKDEP
33d201e0277b2 (Tahsin Erdogan 2017-06-21 21:17:10 -0400 208) extern void ext4_xattr_inode_set_class(struct inode *ea_inode);
33d201e0277b2 (Tahsin Erdogan 2017-06-21 21:17:10 -0400 209) #else
33d201e0277b2 (Tahsin Erdogan 2017-06-21 21:17:10 -0400 210) static inline void ext4_xattr_inode_set_class(struct inode *ea_inode) { }
33d201e0277b2 (Tahsin Erdogan 2017-06-21 21:17:10 -0400 211) #endif
7a9ca53aea10a (Tahsin Erdogan 2017-06-22 11:46:48 -0400 212)
7a9ca53aea10a (Tahsin Erdogan 2017-06-22 11:46:48 -0400 213) extern int ext4_get_inode_usage(struct inode *inode, qsize_t *usage);
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