switch selinux delayed superblock handling to iterate_supers()

... kill their private list, while we are at it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index a03fd74..5c9f25b 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -126,11 +126,6 @@ __setup("selinux=", selinux_enabled_setup);
 int selinux_enabled = 1;
 #endif
 
-/* Lists of inode and superblock security structures initialized
-   before the policy was loaded. */
-static LIST_HEAD(superblock_security_head);
-static DEFINE_SPINLOCK(sb_security_lock);
-
 static struct kmem_cache *sel_inode_cache;
 
 /**
@@ -266,7 +261,6 @@ static int superblock_alloc_security(struct super_block *sb)
                return -ENOMEM;
 
        mutex_init(&sbsec->lock);
-       INIT_LIST_HEAD(&sbsec->list);
        INIT_LIST_HEAD(&sbsec->isec_head);
        spin_lock_init(&sbsec->isec_lock);
        sbsec->sb = sb;
@@ -281,12 +275,6 @@ static int superblock_alloc_security(struct super_block *sb)
 static void superblock_free_security(struct super_block *sb)
 {
        struct superblock_security_struct *sbsec = sb->s_security;
-
-       spin_lock(&sb_security_lock);
-       if (!list_empty(&sbsec->list))
-               list_del_init(&sbsec->list);
-       spin_unlock(&sb_security_lock);
-
        sb->s_security = NULL;
        kfree(sbsec);
 }
@@ -612,10 +600,6 @@ static int selinux_set_mnt_opts(struct super_block *sb,
                        /* Defer initialization until selinux_complete_init,
                           after the initial policy is loaded and the security
                           server is ready to handle calls. */
-                       spin_lock(&sb_security_lock);
-                       if (list_empty(&sbsec->list))
-                               list_add(&sbsec->list, &superblock_security_head);
-                       spin_unlock(&sb_security_lock);
                        goto out;
                }
                rc = -EINVAL;
@@ -806,16 +790,10 @@ static void selinux_sb_clone_mnt_opts(const struct super_block *oldsb,
 
        /*
         * if the parent was able to be mounted it clearly had no special lsm
-        * mount options.  thus we can safely put this sb on the list and deal
-        * with it later
+        * mount options.  thus we can safely deal with this superblock later
         */
-       if (!ss_initialized) {
-               spin_lock(&sb_security_lock);
-               if (list_empty(&newsbsec->list))
-                       list_add(&newsbsec->list, &superblock_security_head);
-               spin_unlock(&sb_security_lock);
+       if (!ss_initialized)
                return;
-       }
 
        /* how can we clone if the old one wasn't set up?? */
        BUG_ON(!(oldsbsec->flags & SE_SBINITIALIZED));
@@ -5680,35 +5658,18 @@ static __init int selinux_init(void)
        return 0;
 }
 
+static void delayed_superblock_init(struct super_block *sb, void *unused)
+{
+       superblock_doinit(sb, NULL);
+}
+
 void selinux_complete_init(void)
 {
        printk(KERN_DEBUG "SELinux:  Completing initialization.\n");
 
        /* Set up any superblocks initialized prior to the policy load. */
        printk(KERN_DEBUG "SELinux:  Setting up existing superblocks.\n");
-       spin_lock(&sb_lock);
-       spin_lock(&sb_security_lock);
-next_sb:
-       if (!list_empty(&superblock_security_head)) {
-               struct superblock_security_struct *sbsec =
-                               list_entry(superblock_security_head.next,
-                                          struct superblock_security_struct,
-                                          list);
-               struct super_block *sb = sbsec->sb;
-               sb->s_count++;
-               spin_unlock(&sb_security_lock);
-               spin_unlock(&sb_lock);
-               down_read(&sb->s_umount);
-               if (sb->s_root)
-                       superblock_doinit(sb, NULL);
-               drop_super(sb);
-               spin_lock(&sb_lock);
-               spin_lock(&sb_security_lock);
-               list_del_init(&sbsec->list);
-               goto next_sb;
-       }
-       spin_unlock(&sb_security_lock);
-       spin_unlock(&sb_lock);
+       iterate_supers(delayed_superblock_init, NULL);
 }
 
 /* SELinux requires early initialization in order to label

diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index c4e0623..26c7eee 100644 (file)
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -55,7 +55,6 @@ struct file_security_struct {
 
 struct superblock_security_struct {
        struct super_block *sb;         /* back pointer to sb object */
-       struct list_head list;          /* list of superblock_security_struct */
        u32 sid;                        /* SID of file system superblock */
        u32 def_sid;                    /* default SID for labeling */
        u32 mntpoint_sid;               /* SECURITY_FS_USE_MNTPOINT context for files */