Commit 038d0698 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim

f2fs: disallow direct IO in atomic write

Atomic write needs page cache to cache data of transaction,
direct IO should never be allowed in atomic write, detect
and deny it when open atomic write file.
Signed-off-by: default avatarGao Xiang <gaoxiang25@huawei.com>
Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent fe973b06
...@@ -1825,6 +1825,9 @@ static int f2fs_ioc_start_atomic_write(struct file *filp) ...@@ -1825,6 +1825,9 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
if (!S_ISREG(inode->i_mode)) if (!S_ISREG(inode->i_mode))
return -EINVAL; return -EINVAL;
if (filp->f_flags & O_DIRECT)
return -EINVAL;
ret = mnt_want_write_file(filp); ret = mnt_want_write_file(filp);
if (ret) if (ret)
return ret; return ret;
......
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