# Copyright (C) 2005 Tresys Technology, LLC

policy_module(lvm,1.0)

########################################

#

# Declarations

#

type lvm_t;

type lvm_exec_t;

init_make_system_domain(lvm_t,lvm_exec_t)

# needs privowner because it assigns the identity system_u to device nodes

# but runs as the identity of the sysadmin

kernel_make_object_identity_change_constraint_exception(lvm_t)

role system_r types lvm_t;

type lvm_etc_t;

files_make_file(lvm_etc_t)

type lvm_lock_t;

files_make_lock_file(lvm_lock_t)

type lvm_metadata_t;

files_make_file(lvm_metadata_t)

type lvm_tmp_t;

files_make_temporary_file(lvm_tmp_t)

########################################

#

# Local policy

#

# DAC overrides and mknod for modifying /dev entries (vgmknodes)

allow lvm_t self:capability { dac_override ipc_lock sys_admin sys_nice mknod };

dontaudit lvm_t self:capability sys_tty_config;

allow lvm_t self:process { sigchld sigkill sigstop signull signal };

# LVM will complain a lot if it cannot set its priority.

allow lvm_t self:process setsched;

allow lvm_t self:file { read getattr lock ioctl };

allow lvm_t self:fifo_file { ioctl read getattr lock write append };

allow lvm_t self:unix_dgram_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };

allow lvm_t lvm_tmp_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };

allow lvm_t lvm_tmp_t:file { create ioctl read getattr lock write setattr append link unlink rename };

files_create_private_tmp_data(lvm_t, lvm_tmp_t, { file dir })

# /lib/lvm-<version> holds the actual LVM binaries (and symlinks)

allow lvm_t lvm_exec_t:dir search;

allow lvm_t lvm_exec_t:{ file lnk_file } { read getattr lock ioctl };

# LVM is split into many individual binaries

allow lvm_t lvm_exec_t:file { getattr read execute execute_no_trans };

# Creating lock files

allow lvm_t lvm_lock_t:dir { read getattr lock search ioctl add_name remove_name write };

allow lvm_t lvm_lock_t:file { create ioctl read getattr lock write setattr append link unlink rename };

files_create_private_lock_file(lvm_t,lvm_lock_t)

allow lvm_t lvm_etc_t:file { read getattr lock ioctl };

allow lvm_t lvm_etc_t:lnk_file { getattr read };

# Write to /etc/lvm, /etc/lvmtab, /etc/lvmtab.d

allow lvm_t lvm_etc_t:dir { read getattr lock search ioctl add_name remove_name write };

allow lvm_t lvm_metadata_t:file { create ioctl read getattr lock write setattr append link unlink rename };

allow lvm_t lvm_metadata_t:dir { read getattr lock search ioctl add_name remove_name write };

type_transition lvm_t lvm_etc_t:file lvm_metadata_t;

files_create_private_config(lvm_t,lvm_metadata_t,file)

kernel_read_system_state(lvm_t)

kernel_get_selinuxfs_mount_point(lvm_t)

kernel_validate_selinux_context(lvm_t)

kernel_compute_selinux_access_vector(lvm_t)

kernel_compute_selinux_create_context(lvm_t)

kernel_compute_selinux_relabel_context(lvm_t)

kernel_compute_selinux_reachable_user_contexts(lvm_t)

kernel_read_kernel_sysctl(lvm_t)

kernel_read_hardware_state(lvm_t)

# Read /sys/block. Device mapper metadata is kept there.

kernel_read_hardware_state(sysfs_t)

# Read system variables in /proc/sys

kernel_read_kernel_sysctl(lvm_t)

# it has no reason to need this

kernel_ignore_get_core_interface_attributes(lvm_t)

devices_get_random_data(lvm_t)

devices_get_pseudorandom_data(lvm_t)

devices_use_lvm_control_channel(lvm_t)

devices_manage_dev_symbolic_links(lvm_t)

# LVM (vgscan) scans for devices by stating every file in /dev and applying a regex...

devices_ignore_get_all_character_device_attributes(lvm_t)

devices_ignore_get_all_block_device_attributes(lvm_t)

devices_ignore_get_generic_character_device_attributes(lvm_t)

devices_ignore_get_generic_block_device_attributes(lvm_t)

terminal_ignore_get_all_private_physical_terminal_attributes(lvm_t)

filesystem_get_persistent_filesystem_attributes(lvm_t)

corecommands_search_system_programs_directory(lvm_t)

domain_use_widely_inheritable_file_descriptors(lvm_t)

files_search_system_state_data_directory(lvm_t)

files_read_general_system_config(lvm_t)

files_read_runtime_system_config(lvm_t)

init_use_file_descriptors(lvm_t)

init_ignore_get_control_channel_attributes(lvm_t)

init_script_use_pseudoterminal(lvm_t)

libraries_use_dynamic_loader(lvm_t)

libraries_use_shared_libraries(lvm_t)

logging_send_system_log_message(lvm_t)

miscfiles_read_localization(lvm_t)

selinux_read_config(lvm_t)

selinux_read_file_contexts(lvm_t)

selinux_newrole_sigchld(lvm_t)

tunable_policy(`targeted_policy', `

terminal_ignore_use_general_physical_terminal(lvm_t)

terminal_ignore_use_general_pseudoterminal(lvm_t)

files_ignore_read_rootfs_file(lvm_t)

')dnl end targeted_policy tunable

optional_policy(`bootloader.te',`

bootloader_modify_temporary_data(lvm_t)

')

optional_policy(`udev.te', `

udev_read_database(lvm_t)

')

ifdef(`TODO',`

allow lvm_t autofs_t:dir { search getattr };

# LVM creates block devices in /dev/mapper or /dev/<vg>

# depending on its version

# LVM(2) needs to create directores (/dev/mapper, /dev/<vg>)

# and links from /dev/<vg> to /dev/mapper/<vg>-<lv>

allow lvm_t device_t:blk_file { create ioctl read getattr lock write setattr append link unlink rename };

type_transition lvm_t device_t:blk_file fixed_disk_device_t;

# Access raw devices and old /dev/lvm (c 109,0).  Is this needed?

allow lvm_t fixed_disk_device_t:chr_file { create ioctl read getattr lock write setattr append link unlink rename };

allow lvm_t default_context_t:dir search;

allow lvm_t fixed_disk_device_t:blk_file { relabelfrom relabelto };

allow lvm_t device_t:lnk_file { relabelfrom relabelto };

# LVM (vgscan) scans for devices by stating every file in /dev and applying a regex...

dontaudit lvm_t device_t:fifo_file getattr;

dontaudit lvm_t sbin_t:file getattr;

dontaudit lvm_t var_run_t:dir getattr;

# for when /usr is not mounted

dontaudit lvm_t file_t:dir search;

optional_policy(`gnome-pty-helper.te', `

allow lvm_t sysadm_gph_t:fd use;

')

optional_policy(`gpm.te', `

dontaudit lvm_t gpmctl_t:sock_file getattr;

')

optional_policy(`rhgb.te', `

allow $1_t rhgb_t:process sigchld;

allow $1_t rhgb_t:fd use;

allow $1_t rhgb_t:fifo_file { read write };

')

') dnl end TODO