aout: remove unnecessary inclusions of {asm, linux}/a.out.h

[pandora-kernel.git] / fs / super.c

diff --git a/fs/super.c b/fs/super.c
index 8341e4e..ceaf2e3 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -15,7 +15,7 @@
  *  Added kerneld support: Jacques Gelinas and Bjorn Ekwall
  *  Added change_root: Werner Almesberger & Hans Lermen, Feb '96
  *  Added options to /proc/mounts:
- *    Torbjörn Lindh (torbjorn.lindh@gopta.se), April 14, 1996.
+ *    Torbjörn Lindh (torbjorn.lindh@gopta.se), April 14, 1996.
  *  Added devfs support: Richard Gooch <rgooch@atnf.csiro.au>, 13-JAN-1998
  *  Heavily rewritten for 'one fs - one tree' dcache architecture. AV, Mar 2000
  */
@@ -40,10 +40,6 @@
 #include <asm/uaccess.h>
 
 
-void get_filesystem(struct file_system_type *fs);
-void put_filesystem(struct file_system_type *fs);
-struct file_system_type *get_fs_type(const char *name);
-
 LIST_HEAD(super_blocks);
 DEFINE_SPINLOCK(sb_lock);
 
@@ -67,6 +63,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
                }
                INIT_LIST_HEAD(&s->s_dirty);
                INIT_LIST_HEAD(&s->s_io);
+               INIT_LIST_HEAD(&s->s_more_io);
                INIT_LIST_HEAD(&s->s_files);
                INIT_LIST_HEAD(&s->s_instances);
                INIT_HLIST_HEAD(&s->s_anon);
@@ -107,6 +104,7 @@ out:
 static inline void destroy_super(struct super_block *s)
 {
        security_sb_free(s);
+       kfree(s->s_subtype);
        kfree(s);
 }
 
@@ -334,21 +332,21 @@ struct super_block *sget(struct file_system_type *type,
                        void *data)
 {
        struct super_block *s = NULL;
-       struct list_head *p;
+       struct super_block *old;
        int err;
 
 retry:
        spin_lock(&sb_lock);
-       if (test) list_for_each(p, &type->fs_supers) {
-               struct super_block *old;
-               old = list_entry(p, struct super_block, s_instances);
-               if (!test(old, data))
-                       continue;
-               if (!grab_super(old))
-                       goto retry;
-               if (s)
-                       destroy_super(s);
-               return old;
+       if (test) {
+               list_for_each_entry(old, &type->fs_supers, s_instances) {
+                       if (!test(old, data))
+                               continue;
+                       if (!grab_super(old))
+                               goto retry;
+                       if (s)
+                               destroy_super(s);
+                       return old;
+               }
        }
        if (!s) {
                spin_unlock(&sb_lock);
@@ -419,7 +417,7 @@ restart:
 }
 
 /*
- * Call the ->sync_fs super_op against all filesytems which are r/w and
+ * Call the ->sync_fs super_op against all filesystems which are r/w and
  * which implement it.
  *
  * This operation is careful to avoid the livelock which could easily happen
@@ -427,7 +425,7 @@ restart:
  * is used only here.  We set it against all filesystems and then clear it as
  * we sync them.  So redirtied filesystems are skipped.
  *
- * But if process A is currently running sync_filesytems and then process B
+ * But if process A is currently running sync_filesystems and then process B
  * calls sync_filesystems as well, process B will set all the s_need_sync_fs
  * flags again, which will cause process A to resync everything.  Fix that with
  * a local mutex.
@@ -883,6 +881,7 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
        error = type->get_sb(type, flags, name, data, mnt);
        if (error < 0)
                goto out_free_secdata;
+       BUG_ON(!mnt->mnt_sb);
 
        error = security_sb_kern_mount(mnt->mnt_sb, secdata);
        if (error)
@@ -907,6 +906,29 @@ out:
 
 EXPORT_SYMBOL_GPL(vfs_kern_mount);
 
+static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype)
+{
+       int err;
+       const char *subtype = strchr(fstype, '.');
+       if (subtype) {
+               subtype++;
+               err = -EINVAL;
+               if (!subtype[0])
+                       goto err;
+       } else
+               subtype = "";
+
+       mnt->mnt_sb->s_subtype = kstrdup(subtype, GFP_KERNEL);
+       err = -ENOMEM;
+       if (!mnt->mnt_sb->s_subtype)
+               goto err;
+       return mnt;
+
+ err:
+       mntput(mnt);
+       return ERR_PTR(err);
+}
+
 struct vfsmount *
 do_kern_mount(const char *fstype, int flags, const char *name, void *data)
 {
@@ -915,13 +937,16 @@ do_kern_mount(const char *fstype, int flags, const char *name, void *data)
        if (!type)
                return ERR_PTR(-ENODEV);
        mnt = vfs_kern_mount(type, flags, name, data);
+       if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) &&
+           !mnt->mnt_sb->s_subtype)
+               mnt = fs_set_subtype(mnt, fstype);
        put_filesystem(type);
        return mnt;
 }
 
-struct vfsmount *kern_mount(struct file_system_type *type)
+struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
 {
-       return vfs_kern_mount(type, 0, type->name, NULL);
+       return vfs_kern_mount(type, MS_KERNMOUNT, type->name, data);
 }
 
-EXPORT_SYMBOL(kern_mount);
+EXPORT_SYMBOL_GPL(kern_mount_data);