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.
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
fs/f2fs/data.c | 15 +++++++--------
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 aac426109489..5a80654499c9 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 @@ 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));
}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index b5c1f8e3d62f..50af57c6ecf3 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -602,6 +602,7 @@ 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,
--
2.17.0.441.gb46fe60e1d-goog
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