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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-09-19 15:28:40 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-09-26 12:45:34 -0700 |
| commit | 0a4daae5ffea39f5015334e4d18a6a80b447cae4 (patch) | |
| tree | 56e7018a65f6615649a4ff719c8063c3ff7cd89f /fs/f2fs/data.c | |
| parent | d83d0f5ba8532e649146ac32ae47167a28d98c84 (diff) | |
| download | linux-0a4daae5ffea39f5015334e4d18a6a80b447cae4.tar.bz2 | |
f2fs: update i_size after DIO completion
This is related to
ee70daaba82d ("xfs: update i_size after unwritten conversion in dio completion")
If we update i_size during dio_write, dio_read can read out stale data, which
breaks xfstests/465.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 57c0823d22e0..41102c227eee 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -881,7 +881,6 @@ static int __allocate_data_block(struct dnode_of_data *dn, int seg_type) struct f2fs_summary sum; struct node_info ni; block_t old_blkaddr; - pgoff_t fofs; blkcnt_t count = 1; int err; @@ -910,12 +909,10 @@ alloc: old_blkaddr, old_blkaddr); f2fs_set_data_blkaddr(dn); - /* update i_size */ - fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + - dn->ofs_in_node; - if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) - f2fs_i_size_write(dn->inode, - ((loff_t)(fofs + 1) << PAGE_SHIFT)); + /* + * i_size will be updated by direct_IO. Otherwise, we'll get stale + * data from unwritten block via dio_read. + */ return 0; } @@ -1081,6 +1078,8 @@ next_block: last_ofs_in_node = dn.ofs_in_node; } } else { + WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO && + flag != F2FS_GET_BLOCK_DIO); err = __allocate_data_block(&dn, map->m_seg_type); if (!err) @@ -1260,7 +1259,7 @@ static int get_data_block_dio(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { return __get_data_block(inode, iblock, bh_result, create, - F2FS_GET_BLOCK_DEFAULT, NULL, + F2FS_GET_BLOCK_DIO, NULL, f2fs_rw_hint_to_seg_type( inode->i_write_hint)); } |