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ext4: move __ext4_check_blockref to block_validity.c

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In preparation for moving the indirect functions to a separate file,
move __ext4_check_blockref() to block_validity.c and rename it to
ext4_check_blockref() which is exported as globally visible function.

Also, rename the cpp macro ext4_check_inode_blockref() to
ext4_ind_check_inode(), to make it clear that it is only valid for use
with non-extent mapped inodes.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2011-06-27 19:16:02 -04:00
parent 8bb2b24712
commit 1f7d1e7741
3 changed files with 36 additions and 34 deletions
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20
fs/ext4/block_validity.c
View file

@ -246,3 +246,23 @@ int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk,
return 1;
}
int ext4_check_blockref(const char *function, unsigned int line,
struct inode *inode, __le32 *p, unsigned int max)
{
struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
__le32 *bref = p;
unsigned int blk;
while (bref < p+max) {
blk = le32_to_cpu(*bref++);
if (blk &&
unlikely(!ext4_data_block_valid(EXT4_SB(inode->i_sb),
blk, 1))) {
es->s_last_error_block = cpu_to_le64(blk);
ext4_error_inode(inode, function, line, blk,
"invalid block");
return -EIO;
}
}
return 0;
}

15
fs/ext4/ext4.h
View file

@ -2124,6 +2124,19 @@ static inline void ext4_mark_super_dirty(struct super_block *sb)
sb->s_dirt =1;
}
/*
* Block validity checking
*/
#define ext4_check_indirect_blockref(inode, bh) \
ext4_check_blockref(__func__, __LINE__, inode, \
(__le32 *)(bh)->b_data, \
EXT4_ADDR_PER_BLOCK((inode)->i_sb))
#define ext4_ind_check_inode(inode) \
ext4_check_blockref(__func__, __LINE__, inode, \
EXT4_I(inode)->i_data, \
EXT4_NDIR_BLOCKS)
/*
* Inodes and files operations
*/
@ -2153,6 +2166,8 @@ extern void ext4_exit_system_zone(void);
extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
ext4_fsblk_t start_blk,
unsigned int count);
extern int ext4_check_blockref(const char *, unsigned int,
struct inode *, __le32 *, unsigned int);
/* extents.c */
extern int ext4_ext_tree_init(handle_t *handle, struct inode *);

35
fs/ext4/inode.c
View file

@ -360,39 +360,6 @@ static int ext4_block_to_path(struct inode *inode,
return n;
}
static int __ext4_check_blockref(const char *function, unsigned int line,
struct inode *inode,
__le32 *p, unsigned int max)
{
struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
__le32 *bref = p;
unsigned int blk;
while (bref < p+max) {
blk = le32_to_cpu(*bref++);
if (blk &&
unlikely(!ext4_data_block_valid(EXT4_SB(inode->i_sb),
blk, 1))) {
es->s_last_error_block = cpu_to_le64(blk);
ext4_error_inode(inode, function, line, blk,
"invalid block");
return -EIO;
}
}
return 0;
}
#define ext4_check_indirect_blockref(inode, bh) \
__ext4_check_blockref(__func__, __LINE__, inode, \
(__le32 *)(bh)->b_data, \
EXT4_ADDR_PER_BLOCK((inode)->i_sb))
#define ext4_check_inode_blockref(inode) \
__ext4_check_blockref(__func__, __LINE__, inode, \
EXT4_I(inode)->i_data, \
EXT4_NDIR_BLOCKS)
/**
* ext4_get_branch - read the chain of indirect blocks leading to data
* @inode: inode in question
@ -5010,7 +4977,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
(S_ISLNK(inode->i_mode) &&
!ext4_inode_is_fast_symlink(inode))) {
/* Validate block references which are part of inode */
ret = ext4_check_inode_blockref(inode);
ret = ext4_ind_check_inode(inode);
}
if (ret)
goto bad_inode;