1 // SPDX-License-Identifier: GPL-2.0
3  * fs/sysfs/symlink.c - sysfs symlink implementation
5  * Copyright (c) 2001-3 Patrick Mochel
27 		return -EINVAL;  in sysfs_do_create_link_sd()
35 	if (target_kobj->sd) {  in sysfs_do_create_link_sd()
36 		target = target_kobj->sd;  in sysfs_do_create_link_sd()
42 		return -ENOENT;  in sysfs_do_create_link_sd()
50 	if (warn && PTR_ERR(kn) == -EEXIST)  in sysfs_do_create_link_sd()
56  *	sysfs_create_link_sd - create symlink to a given object.
57  *	@kn:		directory we're creating the link in.
58  *	@target:	object we're pointing to.
75 		parent = kobj->sd;  in sysfs_do_create_link()
78 		return -EFAULT;  in sysfs_do_create_link()
84  *	sysfs_create_link - create symlink between two objects.
85  *	@kobj:	object whose directory we're creating the link in.
86  *	@target:	object we're pointing to.
97  *	sysfs_create_link_nowarn - create symlink between two objects.
98  *	@kobj:	object whose directory we're creating the link in.
99  *	@target:	object we're pointing to.
113  *	sysfs_delete_link - remove symlink in object's directory.
114  *	@kobj:	object we're acting for.
115  *	@targ:	object we're pointing to.
132 	if (targ->sd && kernfs_ns_enabled(kobj->sd))  in sysfs_delete_link()
133 		ns = targ->sd->ns;  in sysfs_delete_link()
135 	kernfs_remove_by_name_ns(kobj->sd, name, ns);  in sysfs_delete_link()
139  *	sysfs_remove_link - remove symlink in object's directory.
140  *	@kobj:	object we're acting for.
150 		parent = kobj->sd;  in sysfs_remove_link()
157  *	sysfs_rename_link_ns - rename symlink in object's directory.
158  *	@kobj:	object we're acting for.
159  *	@targ:	object we're pointing to.
176 		parent = kobj->sd;  in sysfs_rename_link_ns()
178 	if (targ->sd)  in sysfs_rename_link_ns()
179 		old_ns = targ->sd->ns;  in sysfs_rename_link_ns()
181 	result = -ENOENT;  in sysfs_rename_link_ns()
186 	result = -EINVAL;  in sysfs_rename_link_ns()
189 	if (kn->symlink.target_kn->priv != targ)  in sysfs_rename_link_ns()