Commit eef36cf6 authored by Miklos Szeredi's avatar Miklos Szeredi
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fuse: optmize missing FUSE_LINK support



If filesystem doesn't support FUSE_LINK (i.e. returns -ENOSYS), then
remember this and next time return immediately, without incurring the
overhead of a round trip to the server.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 83442135
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+8 −1
Original line number Diff line number Diff line
@@ -1123,6 +1123,9 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
	struct fuse_mount *fm = get_fuse_mount(inode);
	FUSE_ARGS(args);

	if (fm->fc->no_link)
		goto out;

	memset(&inarg, 0, sizeof(inarg));
	inarg.oldnodeid = get_node_id(inode);
	args.opcode = FUSE_LINK;
@@ -1138,7 +1141,11 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
		fuse_invalidate_attr(inode);

	if (err == -ENOSYS)
		err = -EPERM;
		fm->fc->no_link = 1;
out:
	if (fm->fc->no_link)
		return -EPERM;

	return err;
}

+3 −0
Original line number Diff line number Diff line
@@ -870,6 +870,9 @@ struct fuse_conn {
	/* Use pages instead of pointer for kernel I/O */
	unsigned int use_pages_for_kvec_io:1;

	/* Is link not implemented by fs? */
	unsigned int no_link:1;

	/* Use io_uring for communication */
	unsigned int io_uring;