diff options
| author | Jan Kara <jack@suse.cz> | 2020-07-08 17:35:16 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-08-06 07:05:46 +0200 |
| commit | 0b3171b6d195637f84ddf8b59bae818ea20bc8ac (patch) | |
| tree | 6b42f17fa36f96a449d665d60002330acf90f14d /fs | |
| parent | ext4: replace HTTP links with HTTPS ones (diff) | |
| download | linux-0b3171b6d195637f84ddf8b59bae818ea20bc8ac.tar.xz linux-0b3171b6d195637f84ddf8b59bae818ea20bc8ac.zip | |
ext4: do not block RWF_NOWAIT dio write on unallocated space
Since commit 378f32bab371 ("ext4: introduce direct I/O write using iomap
infrastructure") we don't properly bail out of RWF_NOWAIT direct IO
write if underlying blocks are not allocated. Also
ext4_dio_write_checks() does not honor RWF_NOWAIT when re-acquiring
i_rwsem. Fix both issues.
Fixes: 378f32bab371 ("ext4: introduce direct I/O write using iomap infrastructure")
Cc: stable@kernel.org
Reported-by: Filipe Manana <fdmanana@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200708153516.9507-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/file.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 453cafecf5cc..7a2720517bbb 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -427,6 +427,10 @@ restart: */ if (*ilock_shared && (!IS_NOSEC(inode) || *extend || !ext4_overwrite_io(inode, offset, count))) { + if (iocb->ki_flags & IOCB_NOWAIT) { + ret = -EAGAIN; + goto out; + } inode_unlock_shared(inode); *ilock_shared = false; inode_lock(inode); |