nvme_subsys...ch_ctrl_safe(2)

okay so bestie, welcome to the libnvme API manual 💖 today's episode is all about nvme_subsystem_for_each_ctrl_safe(2), and honestly? she's giving iterator royalty, no cap 👑

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✨ NAME ✨

nvme_subsystem_for_each_ctrl_safe — traverse controllers 🎀

like, that's the whole job. she traverses controllers. she's the _safe one, and yes she ate 💅

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🦋 SYNOPSIS 🦋

nvme_subsystem_for_each_ctrl_safe (s , c , _c );

three args, that's it, that's the whole vibe 🌸

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🎀 ARGUMENTS 🎀

• s — an nvme_subsystem_t object 💖 this is the subsystem you're walking through, your main character, the one everything else hangs off of.
• c — Controller instance ✨ this is where each controller lands as you go — she hands you one at a time, one controller per spin of the loop, and you do your lil thing with it.
• _c — a nvme_ctrl_t_node to use as temporary storage 🫶 this is the behind-the-scenes girlie. she's not the star, she's the scaffolding — an nvme_ctrl_t_node you hand over so the loop has somewhere to park its temp data. don't get attached, don't reuse her elsewhere, just let her do her job 🙈

lowkey the important part: _c is storage, not a controller you should be reading from. she's the plumbing, not the faucet 💀

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and that's the page fr fr 🦋 no hidden flags, no sneaky exit statuses, no environment variables lurking in the shadows — just a subsystem, a controller, and one very dedicated temporary nvme_ctrl_t_node doing the most ✨

slay, go traverse something 💅

— with love from the libnvme API manual, nvme_subsys...ch_ctrl_safe(2), July 2026 🎀 mwah 💖