C++ (Cpp) proc_fill_super Examples

Example #1

File: root.c Project: agrloki/CeXstel-kernel-msm8x25

static struct dentry *proc_mount(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data)
{
	int err;
	struct super_block *sb;
	struct pid_namespace *ns;
	struct proc_inode *ei;
	char *options;

	if (flags & MS_KERNMOUNT) {
		ns = (struct pid_namespace *)data;
		options = NULL;
	} else {
		ns = current->nsproxy->pid_ns;
		options = data;
	}

	sb = sget(fs_type, proc_test_super, proc_set_super, ns);
	if (IS_ERR(sb))
		return ERR_CAST(sb);

	if (!proc_parse_options(options, ns)) {
		deactivate_locked_super(sb);
		return ERR_PTR(-EINVAL);
	}

	if (!sb->s_root) {
		sb->s_flags = flags;
		err = proc_fill_super(sb);
		if (err) {
			deactivate_locked_super(sb);
			return ERR_PTR(err);
		}

		sb->s_flags |= MS_ACTIVE;
	}

	ei = PROC_I(sb->s_root->d_inode);
	if (!ei->pid) {
		rcu_read_lock();
		ei->pid = get_pid(find_pid_ns(1, ns));
		rcu_read_unlock();
	}

	return dget(sb->s_root);
}

Example #2

File: root.c Project: 7799/linux

static struct dentry *proc_mount(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data)
{
	int err;
	struct super_block *sb;
	struct pid_namespace *ns;
	char *options;

	if (flags & MS_KERNMOUNT) {
		ns = (struct pid_namespace *)data;
		options = NULL;
	} else {
		ns = task_active_pid_ns(current);
		options = data;

		if (!capable(CAP_SYS_ADMIN) && !fs_fully_visible(fs_type))
			return ERR_PTR(-EPERM);

		/* Does the mounter have privilege over the pid namespace? */
		if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN))
			return ERR_PTR(-EPERM);
	}

	sb = sget(fs_type, proc_test_super, proc_set_super, flags, ns);
	if (IS_ERR(sb))
		return ERR_CAST(sb);

	if (!proc_parse_options(options, ns)) {
		deactivate_locked_super(sb);
		return ERR_PTR(-EINVAL);
	}

	if (!sb->s_root) {
		err = proc_fill_super(sb);
		if (err) {
			deactivate_locked_super(sb);
			return ERR_PTR(err);
		}

		sb->s_flags |= MS_ACTIVE;
	}

	return dget(sb->s_root);
}

Example #3

File: root.c Project: BigBot96/android_kernel_samsung_gts2wifi

static struct dentry *proc_mount(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data)
{
	int err;
	struct super_block *sb;
	struct pid_namespace *ns;
	char *options;

	if (flags & MS_KERNMOUNT) {
		ns = (struct pid_namespace *)data;
		options = NULL;
	} else {
		ns = task_active_pid_ns(current);
		options = data;

		if (!current_user_ns()->may_mount_proc)
			return ERR_PTR(-EPERM);
	}

	sb = sget(fs_type, proc_test_super, proc_set_super, flags, ns);
	if (IS_ERR(sb))
		return ERR_CAST(sb);

	if (!proc_parse_options(options, ns)) {
		deactivate_locked_super(sb);
		return ERR_PTR(-EINVAL);
	}

	if (!sb->s_root) {
		err = proc_fill_super(sb);
		if (err) {
			deactivate_locked_super(sb);
			return ERR_PTR(err);
		}

		sb->s_flags |= MS_ACTIVE;
	}

	return dget(sb->s_root);
}

Example #4

File: root.c Project: vps2fast/openvz-kernel

static int proc_get_sb(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
	int err;
	struct super_block *sb;
	struct pid_namespace *ns;
	struct proc_inode *ei;
	char *options;
#ifdef CONFIG_VE
	struct vfsmount *proc_mnt = fs_type->owner_env->proc_mnt;
#endif

	if (proc_mnt) {
		/* Seed the root directory with a pid so it doesn't need
		 * to be special in base.c.  I would do this earlier but
		 * the only task alive when /proc is mounted the first time
		 * is the init_task and it doesn't have any pids.
		 */
		ei = PROC_I(proc_mnt->mnt_sb->s_root->d_inode);
		if (!ei->pid)
			ei->pid = find_get_pid(1);
	}

	if (flags & MS_KERNMOUNT) {
		ns = (struct pid_namespace *)data;
		options = NULL;
	} else {
		ns = current->nsproxy->pid_ns;
		options = data;
	}

	sb = sget(fs_type, proc_test_super, proc_set_super, ns);
	if (IS_ERR(sb))
		return PTR_ERR(sb);

	if (!sb->s_root) {
		sb->s_flags = (flags & ~MS_RDONLY);
		if (!proc_parse_options(options, ns)) {
			deactivate_locked_super(sb);
			return -EINVAL;
		}
		err = proc_fill_super(sb);
		if (err) {
			deactivate_locked_super(sb);
			return err;
		}

		ei = PROC_I(sb->s_root->d_inode);
		if (!ei->pid) {
			rcu_read_lock();
			ei->pid = get_pid(find_pid_ns(1, ns));
			rcu_read_unlock();
		}

		sb->s_flags |= MS_ACTIVE;
		ns->proc_mnt = mnt;
	}

	simple_set_mnt(mnt, sb);
	return 0;
}