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f2fs: update i_size after DIO completion

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This is related to
ee70daaba8 ("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>
This commit is contained in:
Jaegeuk Kim 2018-09-19 15:28:40 -07:00
parent d83d0f5ba8
commit 0a4daae5ff
2 changed files with 8 additions and 8 deletions
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15
fs/f2fs/data.c
View File

@ -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 @@ static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
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 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
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));
}

1
fs/f2fs/f2fs.h
View File

@ -599,6 +599,7 @@ 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,