[Ocfs2-commits] jlbec commits r1930 - trunk/fs/usysfs

[svn-commits at oss.oracle.com]

Author: jlbec
Signed-off-by: mfasheh
Date: 2005-03-01 20:35:11 -0600 (Tue, 01 Mar 2005)
New Revision: 1930

Modified:
   trunk/fs/usysfs/symlink.c
Log:

o Commit the symlink code I have so far, so that others can work on it.

Signed-off-by: mfasheh



Modified: trunk/fs/usysfs/symlink.c
===================================================================
--- trunk/fs/usysfs/symlink.c	2005-03-02 02:24:30 UTC (rev 1929)
+++ trunk/fs/usysfs/symlink.c	2005-03-02 02:35:11 UTC (rev 1930)
@@ -1,4 +1,6 @@
-/*
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
  * symlink.c - operations for usysfs symlinks.
  */
 
@@ -95,6 +97,53 @@
 }
 
 
+int usysfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
+{
+	int ret;
+	struct nameidata nd;
+	struct kobject *parent_kobj;
+	struct kobject *target_kobj;
+	struct ukobj_type *uktype;
+
+	if (dentry->d_parent == usysfs_sb->s_root)
+		return -EPERM;
+
+	parent_kobj = usysfs_get_kobject(dentry->d_parent);
+	uktype = to_uktype(parent_kobj->ktype);
+
+	if (!uktype || !uktype->allow_link) {
+		kobject_put(parent_kobj);
+		return -EPERM;  /* What lack-of-symlink returns */
+	}
+
+	ret = path_lookup(symname, LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &nd);
+	if (ret) {
+		kobject_put(parent_kobj);
+		return ret;
+	}
+
+	ret = -ENOENT;
+	target_kobj = usysfs_get_kobject(nd.dentry);
+	if (!target_kobj)
+		goto out_release;
+
+	ret = uktype->allow_link(parent_kobj, target_kobj);
+	if (ret)
+		goto out_target;
+
+	return 0;
+
+out_target:
+	kobject_put(target_kobj);
+
+out_release:
+	path_release(&nd);
+
+	kobject_put(parent_kobj);
+
+	return ret;
+}
+
 /**
  *	usysfs_remove_link - remove symlink in object's directory.
  *	@kobj:	object we're acting for.