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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-09-19 15:28:40 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-20 18:47:39 +0100 |
| commit | 7bae8b6b73e46c307fa355ce086800b7ad6610f8 (patch) | |
| tree | f6939a2353a7eae2b30ee758bdd356b3a4165845 /fs | |
| parent | 9de276a804c719f553fe9bc90b6b1998e8747557 (diff) | |
| download | linux-stable-7bae8b6b73e46c307fa355ce086800b7ad6610f8.tar.gz linux-stable-7bae8b6b73e46c307fa355ce086800b7ad6610f8.tar.bz2 linux-stable-7bae8b6b73e46c307fa355ce086800b7ad6610f8.zip | |
f2fs: update i_size after DIO completion
[ Upstream commit 0a4daae5ffea39f5015334e4d18a6a80b447cae4 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/data.c | 15 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
2 files changed, 8 insertions, 8 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index b4a634da1372..3a2fd6676966 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -889,7 +889,6 @@ 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; @@ -918,12 +917,10 @@ 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; } @@ -1089,6 +1086,8 @@ 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) @@ -1268,7 +1267,7 @@ 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)); } diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 6d361c8c6130..2dc49a541907 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -600,6 +600,7 @@ enum { F2FS_GET_BLOCK_DEFAULT, F2FS_GET_BLOCK_FIEMAP, F2FS_GET_BLOCK_BMAP, + F2FS_GET_BLOCK_DIO, F2FS_GET_BLOCK_PRE_DIO, F2FS_GET_BLOCK_PRE_AIO, F2FS_GET_BLOCK_PRECACHE, |