genl-ctrl-list(8)

💖 genl-ctrl-list(8) 💖

okay bestie, welcome to the System Manager's Manual corner of the group chat — this is genl-ctrl-list, and she's here to spill the tea on every Generic Netlink family your kernel is hiding. ✨

🌸 NAME 🌸

genl-ctrl-list — List available kernel-side Generic Netlink families

🦋 SYNOPSIS 🦋

genl-ctrl-list [-d]

✨ DESCRIPTION ✨

So basically, this little icon goes and queries the Generic Netlink controller hanging out inside your kernel, and then prints you a whole list of all the registered Generic Netlink families — including the version of the interface that's been registered. no cap, that's the whole gig. it's giving "roll call but make it netlink." 💅

👑 OPTIONS 👑

• -h, --help — prints the help text to the console and dips. polite queen behavior. 🎀
• -v, --version — prints the versioning info to the console and exits. identity check, slay. 🦋
• -d, --details — turns on the extra tea: it includes additional detailed information for each Generic Netlink family that gets printed. 🍓

The information includes:

• hdrsize N — the size of the user specific header. (yes, that's the exact wording, i don't make the rules 💀)
• maxattr N — the maximum Netlink attribute identifier expected by the interface.
• op NAME (ID) <FLAGS> — a list of available operations, showing their name, numeric identifier, and the flags that indicate the capabilities of the opertion. 🔥

Available flags:

• admin-perm — requires administrative privileges 👑
• has-doit — command can handle request
• has-dump — command can handle a dump request
• has-policy — command enforces attribute validation policy

• grp NAME (ID) — a list of registered multicast groups, including name (if available) and identifier. 🌈
• Example:

0x0010 nlctrl version 2
    hdrsize 0 maxattr 7
      op GETFAMILY (0x03) <has-doit,has-dump,has-policy>
      grp notify (0x10)

⭐ EXAMPLE ⭐

$ genl-ctrl-list
0x0010 nlctrl version 2
0x0011 NLBL_MGMT version 3
0x0012 NLBL_CIPSOv4 version 3
0x0013 NLBL_UNLBL version 3
0x0014 acpi_event version 1
0x0015 thermal_event version 1
0x0016 VFS_DQUOT version 1
0x0017 TASKSTATS version 1
0x0018 NET_DM version 2

look at her go. main character energy, every single line. 😭💜

💜 AUTHOR 💜

Thomas Graf is the original author and current maintainer of libnl and libnl tools. Many people have contributed to it since. 🫶 (a whole squad, fr fr.)

ngl, that's the entire page — every flag, every field, every flag-of-the-flags accounted for. nothing skipped, periodt. 💖

this lil manual page came to you from libnl, dated 20 April 2012 — yes she's been serving since 2012 and she still ate. bye bestie, go list some families 🧚🌸