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ext4: introduce ITAIL helper

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[ Upstream commit 69f3a3039b ]

Introduce ITAIL helper to get the bound of xattr in inode.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250208063141.1539283-2-yebin@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: David Nyström <david.nystrom@est.tech>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ye Bin 2026-01-09 16:23:13 +01:00 committed by Greg Kroah-Hartman
parent 5d0dc83cb9
commit 6c94fd068b
2 changed files with 8 additions and 5 deletions
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10
fs/ext4/xattr.c
View File

@ -599,7 +599,7 @@ ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
return error;
raw_inode = ext4_raw_inode(&iloc);
header = IHDR(inode, raw_inode);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
end = ITAIL(inode, raw_inode);
error = xattr_check_inode(inode, header, end);
if (error)
goto cleanup;
@ -744,7 +744,7 @@ ext4_xattr_ibody_list(struct dentry *dentry, char *buffer, size_t buffer_size)
return error;
raw_inode = ext4_raw_inode(&iloc);
header = IHDR(inode, raw_inode);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
end = ITAIL(inode, raw_inode);
error = xattr_check_inode(inode, header, end);
if (error)
goto cleanup;
@ -830,7 +830,7 @@ int ext4_get_inode_usage(struct inode *inode, qsize_t *usage)
goto out;
raw_inode = ext4_raw_inode(&iloc);
header = IHDR(inode, raw_inode);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
end = ITAIL(inode, raw_inode);
ret = xattr_check_inode(inode, header, end);
if (ret)
goto out;
@ -2228,7 +2228,7 @@ int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
header = IHDR(inode, raw_inode);
is->s.base = is->s.first = IFIRST(header);
is->s.here = is->s.first;
is->s.end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
is->s.end = ITAIL(inode, raw_inode);
if (ext4_test_inode_state(inode, EXT4_STATE_XATTR)) {
error = xattr_check_inode(inode, header, is->s.end);
if (error)
@ -2753,7 +2753,7 @@ retry:
*/
base = IFIRST(header);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
end = ITAIL(inode, raw_inode);
min_offs = end - base;
total_ino = sizeof(struct ext4_xattr_ibody_header) + sizeof(u32);

3
fs/ext4/xattr.h
View File

@ -68,6 +68,9 @@ struct ext4_xattr_entry {
((void *)raw_inode + \
EXT4_GOOD_OLD_INODE_SIZE + \
EXT4_I(inode)->i_extra_isize))
#define ITAIL(inode, raw_inode) \
((void *)(raw_inode) + \
EXT4_SB((inode)->i_sb)->s_inode_size)
#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
/*