/*
* get a superblock on an MTD-backed filesystem
*/
static int get_sb_mtd_aux(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data,
struct mtd_info *mtd,
int (*fill_super)(struct super_block *, void *, int),
struct vfsmount *mnt)
{
struct super_block *sb;
int ret;
sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, mtd);
if (IS_ERR(sb))
goto out_error;
if (sb->s_root)
goto already_mounted;
/* fresh new superblock */
DEBUG(1, "MTDSB: New superblock for device %d (\"%s\")\n",
mtd->index, mtd->name);
sb->s_flags = flags;
ret = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (ret < 0) {
deactivate_locked_super(sb);
return ret;
}
/* go */
sb->s_flags |= MS_ACTIVE;
simple_set_mnt(mnt, sb);
return 0;
/* new mountpoint for an already mounted superblock */
already_mounted:
DEBUG(1, "MTDSB: Device %d (\"%s\") is already mounted\n",
mtd->index, mtd->name);
simple_set_mnt(mnt, sb);
ret = 0;
goto out_put;
out_error:
ret = PTR_ERR(sb);
out_put:
put_mtd_device(mtd);
return ret;
}
/* A feature which supports mount_nodev() with options */
static struct dentry *mount_nodev_with_options(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
int (*fill_super)(struct super_block *, const char *, void *, int))
{
int error;
struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
if (IS_ERR(s))
return ERR_CAST(s);
s->s_flags = flags;
error = fill_super(s, dev_name, data, flags & MS_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(s);
return ERR_PTR(error);
}
s->s_flags |= MS_ACTIVE;
return dget(s->s_root);
}
