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Commit 519c6040 authored by Miklos Szeredi's avatar Miklos Szeredi
Browse files

fuse: optimize fallocate on permanent failure 



If userspace filesystem doesn't support fallocate, remember this and don't send
request next time.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
parent 05ba1f08

fs/fuse/file.c

+7 −0
Original line number Original line Diff line number Diff line
@@ -2185,6 +2185,9 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset, 
	};

	};

	int err;

	int err;





	if (fc->no_fallocate)

		return -EOPNOTSUPP;



	req = fuse_get_req(fc);

	req = fuse_get_req(fc);

	if (IS_ERR(req))

	if (IS_ERR(req))

		return PTR_ERR(req);

		return PTR_ERR(req);
@@ -2196,6 +2199,10 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset, 
	req->in.args[0].value = &inarg;

	req->in.args[0].value = &inarg;

	fuse_request_send(fc, req);

	fuse_request_send(fc, req);

	err = req->out.h.error;

	err = req->out.h.error;

	if (err == -ENOSYS) {

		fc->no_fallocate = 1;

		err = -EOPNOTSUPP;

	}

	fuse_put_request(fc, req);

	fuse_put_request(fc, req);





	return err;

	return err;

fs/fuse/fuse_i.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -478,6 +478,9 @@ struct fuse_conn { 
	/** Are BSD file locking primitives not implemented by fs? */

	/** Are BSD file locking primitives not implemented by fs? */

	unsigned no_flock:1;

	unsigned no_flock:1;





	/** Is fallocate not implemented by fs? */

	unsigned no_fallocate:1;



	/** The number of requests waiting for completion */

	/** The number of requests waiting for completion */

	atomic_t num_waiting;

	atomic_t num_waiting;