selinux-policy/refpolicy/policy/modules/system/lvm.te

policy_module(lvm,1.0)

########################################
#
# Declarations
#

type lvm_t;
type lvm_exec_t;
init_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
domain_obj_id_change_exempt(lvm_t)
role system_r types lvm_t;

type lvm_etc_t;
files_file_type(lvm_etc_t)

type lvm_lock_t;
files_lock_file(lvm_lock_t)

type lvm_metadata_t;
files_file_type(lvm_metadata_t)

type lvm_tmp_t;
files_tmp_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 r_file_perms;
allow lvm_t self:fifo_file rw_file_perms;
allow lvm_t self:unix_dgram_socket create_socket_perms;

allow lvm_t lvm_tmp_t:dir create_dir_perms;
allow lvm_t lvm_tmp_t:file create_file_perms;
files_create_tmp_files(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 } r_file_perms;

# LVM is split into many individual binaries
can_exec(lvm_t, lvm_exec_t)

# Creating lock files
allow lvm_t lvm_lock_t:dir rw_dir_perms;
allow lvm_t lvm_lock_t:file create_file_perms;
files_create_lock_file(lvm_t,lvm_lock_t)

allow lvm_t lvm_etc_t:file r_file_perms;
allow lvm_t lvm_etc_t:lnk_file r_file_perms;
# Write to /etc/lvm, /etc/lvmtab, /etc/lvmtab.d
allow lvm_t lvm_etc_t:dir rw_dir_perms;
allow lvm_t lvm_metadata_t:file create_file_perms;
allow lvm_t lvm_metadata_t:dir rw_dir_perms;
type_transition lvm_t lvm_etc_t:file lvm_metadata_t;
files_create_etc_config(lvm_t,lvm_metadata_t,file)

kernel_read_system_state(lvm_t)
kernel_read_kernel_sysctl(lvm_t)
# Read system variables in /proc/sys
kernel_read_kernel_sysctl(lvm_t)
# it has no reason to need this
kernel_dontaudit_getattr_core(lvm_t)

selinux_get_fs_mount(lvm_t)
selinux_validate_context(lvm_t)
selinux_compute_access_vector(lvm_t)
selinux_compute_create_context(lvm_t)
selinux_compute_relabel_context(lvm_t)
selinux_compute_user_contexts(lvm_t)

dev_create_generic_chr_file(lvm_t)
dev_read_rand(lvm_t)
dev_read_urand(lvm_t)
dev_rw_lvm_control(lvm_t)
dev_manage_generic_symlinks(lvm_t)
dev_relabel_dev_dirs(lvm_t)
dev_manage_generic_blk_file(lvm_t)
dev_read_sysfs(lvm_t)
# Read /sys/block. Device mapper metadata is kept there.
dev_read_sysfs(sysfs_t)
# LVM (vgscan) scans for devices by stating every file in /dev and applying a regex...
dev_dontaudit_getattr_all_chr_files(lvm_t)
dev_dontaudit_getattr_all_blk_files(lvm_t)
dev_dontaudit_getattr_generic_chr_file(lvm_t)
dev_dontaudit_getattr_generic_blk_file(lvm_t)
dev_dontaudit_getattr_generic_pipe(lvm_t)
term_dontaudit_getattr_all_user_ttys(lvm_t)

fs_getattr_xattr_fs(lvm_t)
fs_search_auto_mountpoints(lvm_t)

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

corecmd_search_sbin(lvm_t)
corecmd_dontaudit_getattr_sbin_file(lvm_t)

domain_use_wide_inherit_fd(lvm_t)

files_search_var(lvm_t)
files_read_generic_etc_files(lvm_t)
files_read_etc_runtime_files(lvm_t)
# for when /usr is not mounted:
files_dontaudit_search_isid_type_dir(lvm_t)

init_use_fd(lvm_t)
init_dontaudit_getattr_initctl(lvm_t)
init_use_script_pty(lvm_t)

libs_use_ld_so(lvm_t)
libs_use_shared_libs(lvm_t)

logging_send_syslog_msg(lvm_t)

miscfiles_read_localization(lvm_t)

seutil_read_config(lvm_t)
seutil_read_file_contexts(lvm_t)
seutil_newrole_sigchld(lvm_t)

ifdef(`distro_redhat',`
	# this is from the initrd:
	files_rw_isid_type_dir(lvm_t)
')

ifdef(`targeted_policy', `
	term_dontaudit_use_unallocated_tty(lvm_t)
	term_dontaudit_use_generic_pty(lvm_t)

	files_dontaudit_read_root_file(lvm_t)
')

optional_policy(`bootloader.te',`
	bootloader_rw_tmp_file(lvm_t)
')

optional_policy(`udev.te', `
	udev_read_db(lvm_t)
')

ifdef(`TODO',`
allow lvm_t default_context_t:dir search;
allow lvm_t fixed_disk_device_t:blk_file { relabelfrom relabelto };

# cjp: ? this has no effect since LVM does not
# have lnk_file relabelto for anything else.
allow lvm_t device_t:lnk_file { relabelfrom relabelto };

dontaudit lvm_t var_run_t:dir getattr;

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