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SYSFS: allow sysfs_create_link to create symlinks in the root of sysfs

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This is needed to make the compatible link for /sys/block in the future.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman
2002-04-09 12:14:34 -07:00
parent 6468b3afa7
commit ceeee1fb28
1 changed files with 12 additions and 2 deletions
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14
fs/sysfs/symlink.c
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@@ -3,6 +3,7 @@
*/ */
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/mount.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/kobject.h> #include <linux/kobject.h>
#include <linux/namei.h> #include <linux/namei.h>
@@ -82,10 +83,19 @@ exit1:
*/ */
int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name) int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name)
{ {
struct dentry * dentry = kobj->dentry; struct dentry *dentry = NULL;
int error = -EEXIST; int error = -EEXIST;
BUG_ON(!kobj || !kobj->dentry || !name); BUG_ON(!name);
if (!kobj) {
if (sysfs_mount && sysfs_mount->mnt_sb)
dentry = sysfs_mount->mnt_sb->s_root;
} else
dentry = kobj->dentry;
if (!dentry)
return -EFAULT;
mutex_lock(&dentry->d_inode->i_mutex); mutex_lock(&dentry->d_inode->i_mutex);
if (!sysfs_dirent_exist(dentry->d_fsdata, name)) if (!sysfs_dirent_exist(dentry->d_fsdata, name))