opensm_selinux(8)

💅 opensm_selinux — the SELinux tea for opensm, bestie

okay so this is the opensm_selinux(8) page from the SELinux Policy opensm manual, and honestly? it's giving "niche but essential." let's get into it 🎀

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✨ NAME ✨

opensm_selinux — Security Enhanced Linux Policy for the opensm processes. that's the whole name section, no cap 💖

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the opensm processes via flexible mandatory access control. yes bestie, mandatory — SELinux does not do "optional" 💅

The opensm processes execute with the opensm_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep opensm_t

like literally just run it, you'll see 🦋

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🚪 ENTRYPOINTS 🚪

The opensm_t SELinux type can be entered via the opensm_exec_t file type.

The default entrypoint paths for the opensm_t domain are the following:

/usr/libexec/opensm-launch

that's it. one path. she's lowkey exclusive 👑

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👯 PROCESS TYPES 👯

SELinux defines process types (domains) for each process running on the system.

You can see the context of a process using the -Z option to ps.

Policy governs the access confined processes have to files. SELinux opensm policy is very flexible, allowing users to setup their opensm processes in as secure a method as possible.

The following process types are defined for opensm:

opensm_t

Note: semanage permissive -a opensm_t can be used to make the process type opensm_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it's not a free pass, the receipts still exist 😭

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🎚️ BOOLEANS 🎚️

SELinux policy is customizable based on least access required. opensm policy is extremely flexible and has several booleans that allow you to manipulate the policy and run opensm with the tightest access possible. we love a configurable queen ✨

• if you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

• if you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

• if you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

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🗂️ MANAGED FILES 🗂️

The SELinux process type opensm_t can manage files labeled with the following file types. the paths listed are the default paths for these file types. Note: the processes UID still need to have DAC permissions — SELinux isn't out here overriding DAC, bestie, they're a team 🤝

• cluster_conf_t

/etc/cluster(/.*)?

• cluster_var_lib_t

/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?

• cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

• krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

• opensm_cache_t

/var/cache/opensm(/.*)?

• opensm_log_t

/var/log/opensm.*

• root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

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🏷️ FILE CONTEXTS 🏷️

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to ls.

Policy governs the access confined processes have to these files. SELinux opensm policy is very flexible, allowing users to setup their opensm processes in as secure a method as possible.

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the opensm. if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. slay 🔥

semanage fcontext -a -t opensm_exec_t '/srv/opensm/content(/.*)?'
restorecon -R -v /srv/myopensm_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex queen behavior, honestly 🧚

The following file types are defined for opensm:

opensm_cache_t

• Set files with the opensm_cache_t type, if you want to store the files under the /var/cache directory. caching era 💖

opensm_exec_t

• Set files with the opensm_exec_t type, if you want to transition an executable to the opensm_t domain. the glow-up pipeline 🌈

opensm_log_t

• Set files with the opensm_log_t type, if you want to treat the data as opensm log data, usually stored under the /var/log directory. receipts, preserved 💀

opensm_unit_file_t

• Set files with the opensm_unit_file_t type, if you want to treat the files as opensm unit content.

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. this will modify the SELinux labeling database. you will need to use restorecon to apply the labels. temporary vs permanent, know the difference bestie 🫶

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💻 COMMANDS 💻

• semanage fcontext can also be used to manipulate default file context mappings.
• semanage permissive can also be used to manipulate whether or not a process type is permissive.
• semanage module can also be used to enable/disable/install/remove policy modules.
• semanage boolean can also be used to manipulate the booleans.
• system-config-selinux is a GUI tool available to customize SELinux policy settings. for the visual learners ✨

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✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage . — yes, a machine wrote it, and we still made it cute 💅

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👀 SEE ALSO 👀

selinux(8), opensm(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

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and that's the whole page, bestie 🎀 this came from the opensm manual, version 26-10-06, dated 26-10-06 — go forth and label responsibly 💖🦋