X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fsysfs%2Fmount.c;h=49749955ccafe8b9f4b6dd4393ed5a3a2f92037e;hb=d5aa407f59f5b83d2c50ec88f5bf56d40f1f8978;hp=a1a58b97f322754800ec8ca3cfbe5d25e08881e7;hpb=94bebf4d1b8e7719f0f3944c037a21cfd99a4af7;p=safe%2Fjmp%2Flinux-2.6

diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index a1a58b9..4974995 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -1,5 +1,13 @@
 /*
- * mount.c - operations for initializing and mounting sysfs.
+ * fs/sysfs/symlink.c - operations for initializing and mounting sysfs
+ *
+ * Copyright (c) 2001-3 Patrick Mochel
+ * Copyright (c) 2007 SUSE Linux Products GmbH
+ * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
+ *
+ * This file is released under the GPLv2.
+ *
+ * Please see Documentation/filesystems/sysfs.txt for more information.
  */
 
 #define DEBUG 
@@ -8,38 +16,30 @@
 #include <linux/mount.h>
 #include <linux/pagemap.h>
 #include <linux/init.h>
-#include <asm/semaphore.h>
+#include <linux/module.h>
+#include <linux/magic.h>
 
 #include "sysfs.h"
 
-/* Random magic number */
-#define SYSFS_MAGIC 0x62656572
 
-struct vfsmount *sysfs_mount;
+static struct vfsmount *sysfs_mount;
 struct super_block * sysfs_sb = NULL;
 struct kmem_cache *sysfs_dir_cachep;
 
-static void sysfs_clear_inode(struct inode *inode);
-
-static struct super_operations sysfs_ops = {
+static const struct super_operations sysfs_ops = {
 	.statfs		= simple_statfs,
 	.drop_inode	= generic_delete_inode,
-	.clear_inode	= sysfs_clear_inode,
+	.delete_inode	= sysfs_delete_inode,
 };
 
-static struct sysfs_dirent sysfs_root = {
-	.s_sibling	= LIST_HEAD_INIT(sysfs_root.s_sibling),
-	.s_children	= LIST_HEAD_INIT(sysfs_root.s_children),
-	.s_element	= NULL,
-	.s_type		= SYSFS_ROOT,
-	.s_iattr	= NULL,
+struct sysfs_dirent sysfs_root = {
+	.s_name		= "",
+	.s_count	= ATOMIC_INIT(1),
+	.s_flags	= SYSFS_DIR,
+	.s_mode		= S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
+	.s_ino		= 1,
 };
 
-static void sysfs_clear_inode(struct inode *inode)
-{
-	kfree(inode->i_private);
-}
-
 static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct inode *inode;
@@ -52,21 +52,19 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_time_gran = 1;
 	sysfs_sb = sb;
 
-	inode = sysfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
-				 &sysfs_root);
-	if (inode) {
-		inode->i_op = &sysfs_dir_inode_operations;
-		inode->i_fop = &sysfs_dir_operations;
-		/* directory inodes start off with i_nlink == 2 (for "." entry) */
-		inc_nlink(inode);
-	} else {
+	/* get root inode, initialize and unlock it */
+	mutex_lock(&sysfs_mutex);
+	inode = sysfs_get_inode(&sysfs_root);
+	mutex_unlock(&sysfs_mutex);
+	if (!inode) {
 		pr_debug("sysfs: could not get root inode\n");
 		return -ENOMEM;
 	}
 
+	/* instantiate and link root dentry */
 	root = d_alloc_root(inode);
 	if (!root) {
-		pr_debug("%s: could not get root dentry!\n",__FUNCTION__);
+		pr_debug("%s: could not get root dentry!\n",__func__);
 		iput(inode);
 		return -ENOMEM;
 	}
@@ -84,7 +82,7 @@ static int sysfs_get_sb(struct file_system_type *fs_type,
 static struct file_system_type sysfs_fs_type = {
 	.name		= "sysfs",
 	.get_sb		= sysfs_get_sb,
-	.kill_sb	= kill_litter_super,
+	.kill_sb	= kill_anon_super,
 };
 
 int __init sysfs_init(void)
@@ -93,10 +91,14 @@ int __init sysfs_init(void)
 
 	sysfs_dir_cachep = kmem_cache_create("sysfs_dir_cache",
 					      sizeof(struct sysfs_dirent),
-					      0, 0, NULL, NULL);
+					      0, 0, NULL);
 	if (!sysfs_dir_cachep)
 		goto out;
 
+	err = sysfs_inode_init();
+	if (err)
+		goto out_err;
+
 	err = register_filesystem(&sysfs_fs_type);
 	if (!err) {
 		sysfs_mount = kern_mount(&sysfs_fs_type);
@@ -116,3 +118,17 @@ out_err:
 	sysfs_dir_cachep = NULL;
 	goto out;
 }
+
+#undef sysfs_get
+struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
+{
+	return __sysfs_get(sd);
+}
+EXPORT_SYMBOL_GPL(sysfs_get);
+
+#undef sysfs_put
+void sysfs_put(struct sysfs_dirent *sd)
+{
+	__sysfs_put(sd);
+}
+EXPORT_SYMBOL_GPL(sysfs_put);