5633l1

Listing 1. Telling the Kernel to Mount the Filesystem Internally

static int get_mount (void)
{
        struct vfsmount *mnt;

        spin_lock (&mount_lock);
        if (pcihpfs_mount) {
                mntget(pcihpfs_mount);
                ++pcihpfs_mount_count;
                spin_unlock (&mount_lock);
                goto go_ahead;
        }

        spin_unlock (&mount_lock);
        mnt = kern_mount (&pcihpfs_fs_type);
        if (IS_ERR(mnt)) {
                err ("could not mount the fs...erroring out!\n");
                return -ENODEV;
        }
        spin_lock (&mount_lock);
        if (!pcihpfs_mount) {
                pcihpfs_mount = mnt;
                ++pcihpfs_mount_count;
                spin_unlock (&mount_lock);
                goto go_ahead;
        }
        mntget(pcihpfs_mount);
        ++pcihpfs_mount_count;
        spin_unlock (&mount_lock);
        mntput(mnt);

go_ahead:
        dbg("pcihpfs_mount_count = %d\n", pcihpfs_mount_count);
        return 0;
}