blkmapd_selinux(8)

✨ blkmapd_selinux — the SELinux glow-up for blkmapd ✨

okay so bestie, this is the blkmapd_selinux(8) page from the SELinux Policy blkmapd section, and it's literally about keeping the blkmapd processes safe and iconic. no cap, it's giving security realness. 💅

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🌸 NAME 🌸

blkmapd_selinux — Security Enhanced Linux Policy for the blkmapd processes. periodt.

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🎀 DESCRIPTION 🎀

so like, Security-Enhanced Linux secures the blkmapd processes via flexible mandatory access control. it's not just a vibe, it's the whole point.

the blkmapd processes execute with the blkmapd_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier. iykyk.

for example:

ps -eZ | grep blkmapd_t

that's the vibe check right there. 🔥

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🦋 ENTRYPOINTS 🦋

the blkmapd_t SELinux type can be entered via the blkmapd_exec_t file type. it's like the backstage pass, fr fr.

the default entrypoint paths for the blkmapd_t domain are the following:

/usr/bin/blkmapd

so that's the main character energy path. 👑

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⭐ PROCESS TYPES ⭐

SELinux defines process types (domains) for each process running on the system. it's a whole system, bestie.

you can see the context of a process using the -Z option to ps. that's your peek behind the curtain. 🙈

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

the following process types are defined for blkmapd:

blkmapd_t

Note: semanage permissive -a blkmapd_t can be used to make the process type blkmapd_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, it just chills the denies but still logs the tea. 💀

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🍓 BOOLEANS 🍓

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

two booleans, both enabled by default, both slaying. 🌈

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🧚 MANAGED FILES 🧚

the SELinux process type blkmapd_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. so like, SELinux isn't doing the whole job, you still need your regular perms too. facts. 💯

blkmapd_var_run_t

/run/blkmapd.pid

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

root_t

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

that's a whole lot of cluster energy and root paths. the range is real. 💅

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🔥 FILE CONTEXTS 🔥

SELinux requires files to have an extended attribute to define the file type. it's like every file needs its own little name tag. 🏷️

you can see the context of a file using the -Z option to ls. another vibe check tool in your pocket.

Policy governs the access confined processes have to these files. SELinux blkmapd policy is very flexible allowing users to setup their blkmapd processes in as secure a method as possible. we stan flexibility with security.

🌟 STANDARD FILE CONTEXT 🌟

SELinux defines the file context types for the blkmapd, 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. it's a whole two-step process, bestie.

semanage fcontext -a -t blkmapd_exec_t '/srv/blkmapd/content(/.*)?'
restorecon -R -v /srv/myblkmapd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex is that girl. 💁‍♀️

the following file types are defined for blkmapd:

blkmapd_exec_t

• set files with the blkmapd_exec_t type, if you want to transition an executable to the blkmapd_t domain.

blkmapd_initrc_exec_t

• set files with the blkmapd_initrc_exec_t type, if you want to transition an executable to the blkmapd_initrc_t domain.

blkmapd_var_run_t

• set files with the blkmapd_var_run_t type, if you want to store the blkmapd files under the /run or /var/run directory.

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. 😭

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👑 COMMANDS 👑

semanage fcontext can also be used to manipulate default file context mappings. it's giving admin realness.

semanage permissive can also be used to manipulate whether or not a process type is permissive. permissive mode, we see you.

semanage module can also be used to enable/disable/install/remove policy modules. module management, iconic.

semanage boolean can also be used to manipulate the booleans. boolean tweaking, slay.

system-config-selinux is a GUI tool available to customize SELinux policy settings. for when you want a visual vibe. 🖥️✨

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💜 AUTHOR 💜

this manual page was auto-generated using sepolicy manpage. auto-generated but still ate. 💅

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🌈 SEE ALSO 🌈

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

all the besties you need to check out next. no cap.

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okay bestie, that's the whole page! this little masterpiece was served fresh on 26-10-06 from the blkmapd blkmapd_selinux(8) source. hope you feel fully informed and maybe a little more secure. 💖✨🦋