[f2fs-dev] [PATCH] f2fs: fix to wait dio completion

[f2fs-dev] [PATCH] f2fs: fix to wait dio completion

[Chao Yu]

It should wait all existing dio write IOs before block removal,
otherwise, previous direct write IO may overwrite data in the
block which may be reused by other inode.

Cc: stable@vger.kernel.org
Signed-off-by: Chao Yu <chao@kernel.org>
---
 fs/f2fs/file.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 76a6043caf27..f2d0e0de775f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1056,6 +1056,13 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 				return err;
 		}
 
+		/*
+		 * wait for inflight dio, blocks should be removed after
+		 * IO completion.
+		 */
+		if (attr->ia_size < old_size)
+			inode_dio_wait(inode);
+
 		f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 		filemap_invalidate_lock(inode->i_mapping);
 
@@ -1892,6 +1899,12 @@ static long f2fs_fallocate(struct file *file, int mode,
 	if (ret)
 		goto out;
 
+	/*
+	 * wait for inflight dio, blocks should be removed after IO
+	 * completion.
+	 */
+	inode_dio_wait(inode);
+
 	if (mode & FALLOC_FL_PUNCH_HOLE) {
 		if (offset >= inode->i_size)
 			goto out;
-- 
2.40.1



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Re: [f2fs-dev] [PATCH] f2fs: fix to wait dio completion

[patchwork-bot+f2fs]

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@kernel.org>:

On Thu, 27 Jun 2024 15:17:11 +0800 you wrote:
> It should wait all existing dio write IOs before block removal,
> otherwise, previous direct write IO may overwrite data in the
> block which may be reused by other inode.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Chao Yu <chao@kernel.org>
> 
> [...]

Here is the summary with links:
  - [f2fs-dev] f2fs: fix to wait dio completion
    https://git.kernel.org/jaegeuk/f2fs/c/e60776860678

You are awesome, thank you!
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