Messages in this thread Patch in this message | | | From | Chao Yu <> | Subject | [PATCH 7/8] f2fs: fix to update largest extent under lock | Date | Tue, 11 Oct 2016 22:57:05 +0800 |
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From: Chao Yu <yuchao0@huawei.com>
In order to avoid racing problem, make largest extent cache being updated under lock.
Signed-off-by: Chao Yu <yuchao0@huawei.com> --- fs/f2fs/inode.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 34ae03c..d9cd458 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -252,6 +252,7 @@ retry: int update_inode(struct inode *inode, struct page *node_page) { struct f2fs_inode *ri; + struct extent_tree *et = F2FS_I(inode)->extent_tree; 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_blocks = cpu_to_le64(inode->i_blocks); - if (F2FS_I(inode)->extent_tree) - set_raw_extent(&F2FS_I(inode)->extent_tree->largest, - &ri->i_ext); - else + if (et) { + read_lock(&et->lock); + set_raw_extent(&et->largest, &ri->i_ext); + read_unlock(&et->lock); + } else { memset(&ri->i_ext, 0, sizeof(ri->i_ext)); + } set_raw_inline(inode, ri); ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); -- 2.10.1
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