evie/android_kernel_oneplus_msm8998
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f2fs: fix to update largest extent under lock

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commit b691d98fdd4cc2514c60fd6975e6016da203e64f upstream.

In order to avoid racing problem, make largest extent cache being updated
under lock.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2016-10-11 22:57:05 +08:00 • committed by Jaegeuk Kim
parent 9e3d0bf6d3
commit 1158df42b2
1 changed files with 7 additions and 4 deletions
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11
fs/f2fs/inode.c
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@ -252,6 +252,7 @@ retry:
int update_inode(struct inode *inode, struct page *node_page) int update_inode(struct inode *inode, struct page *node_page)
{ {
struct f2fs_inode *ri; struct f2fs_inode *ri;
struct extent_tree *et = F2FS_I(inode)->extent_tree;
f2fs_inode_synced(inode); f2fs_inode_synced(inode);
@ -267,11 +268,13 @@ int update_inode(struct inode *inode, struct page *node_page)
ri->i_size = cpu_to_le64(i_size_read(inode)); ri->i_size = cpu_to_le64(i_size_read(inode));
ri->i_blocks = cpu_to_le64(inode->i_blocks); ri->i_blocks = cpu_to_le64(inode->i_blocks);
if (F2FS_I(inode)->extent_tree) if (et) {
set_raw_extent(&F2FS_I(inode)->extent_tree->largest, read_lock(&et->lock);
&ri->i_ext); set_raw_extent(&et->largest, &ri->i_ext);
else read_unlock(&et->lock);
} else {
memset(&ri->i_ext, 0, sizeof(ri->i_ext)); memset(&ri->i_ext, 0, sizeof(ri->i_ext));
}
set_raw_inline(inode, ri); set_raw_inline(inode, ri);
ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);