xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ext4: provide ext4_issue_zeroout()

Browse Source 
Create new function ext4_issue_zeroout() to zeroout contiguous (both
logically and physically) part of inode data. We will need to issue
zeroout when extent structure is not readily available and this function
will allow us to do it without making up fake extent structures.

Signed-off-by: Jan Kara <jack@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara
2015-12-07 15:09:35 -05:00
committed by Theodore Ts'o
parent 2dcba4781f
commit 53085fac02
4 changed files with 23 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
fs/ext4/inode.c
View File

@@ -383,6 +383,21 @@ static int __check_block_validity(struct inode *inode, const char *func,
return 0;
}
int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, ext4_fsblk_t pblk,
ext4_lblk_t len)
{
int ret;
if (ext4_encrypted_inode(inode))
return ext4_encrypted_zeroout(inode, lblk, pblk, len);
ret = sb_issue_zeroout(inode->i_sb, pblk, len, GFP_NOFS);
if (ret > 0)
ret = 0;
return ret;
}
#define check_block_validity(inode, map) \
__check_block_validity((inode), __func__, __LINE__, (map))