diff options
| author | Greg Kroah-Hartman <gregkh@suse.de> | 2002-04-09 12:14:34 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-09-25 21:08:36 -0700 |
| commit | ceeee1fb2897651b434547eb26d93e6d2ff5a1a5 (patch) | |
| tree | d841561babe6538e463069870166524c58e25014 /fs | |
| parent | 6468b3afa7bcd9b0abc5997e5330d78f0bb6626a (diff) | |
| download | lwn-ceeee1fb2897651b434547eb26d93e6d2ff5a1a5.tar.gz lwn-ceeee1fb2897651b434547eb26d93e6d2ff5a1a5.zip | |
SYSFS: allow sysfs_create_link to create symlinks in the root of sysfs
This is needed to make the compatible link for /sys/block in the future.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/sysfs/symlink.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c index d2eac3ceed5f..f50e3cc2ded8 100644 --- a/fs/sysfs/symlink.c +++ b/fs/sysfs/symlink.c @@ -3,6 +3,7 @@ */ #include <linux/fs.h> +#include <linux/mount.h> #include <linux/module.h> #include <linux/kobject.h> #include <linux/namei.h> @@ -82,10 +83,19 @@ exit1: */ 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; - 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); if (!sysfs_dirent_exist(dentry->d_fsdata, name)) |