Commit 9ebce595 authored Jul 19, 2016 by Maxim Patlasov Committed by Miklos Szeredi Jul 29, 2016

fuse: fuse_flush must check mapping->flags for errors



fuse_flush() calls write_inode_now() that triggers writeback, but actual
writeback will happen later, on fuse_sync_writes(). If an error happens,
fuse_writepage_end() will set error bit in mapping->flags. So, we have to
check mapping->flags after fuse_sync_writes().

Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 4d99ff8f ("fuse: Turn writeback cache on")
Cc: <stable@vger.kernel.org> # v3.15+

parent ac7f052b

fs/fuse/file.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -417,6 +417,15 @@ static int fuse_flush(struct file *file, fl_owner_t id)
		fuse_sync_writes(inode);
		inode_unlock(inode);

		if (test_bit(AS_ENOSPC, &file->f_mapping->flags) &&
		test_and_clear_bit(AS_ENOSPC, &file->f_mapping->flags))
		err = -ENOSPC;
		if (test_bit(AS_EIO, &file->f_mapping->flags) &&
		test_and_clear_bit(AS_EIO, &file->f_mapping->flags))
		err = -EIO;
		if (err)
		return err;

		req = fuse_get_req_nofail_nopages(fc, file);
		memset(&inarg, 0, sizeof(inarg));
		inarg.fh = ff->fh;