nvmf_add_ctrl(2)

💖 nvmf_add_ctrl(2) 💖

okay bestie, so we're deep in the libnvme API manual and this one is literally the glow-up function. it's nvmf_add_ctrl, and it's giving connect-a-controller-and-update-the-topology energy. no cap. 🦋

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✨ NAME ✨

nvmf_add_ctrl — connect a controller and update the topology 🫶

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✨ SYNOPSIS ✨

int nvmf_add_ctrl (nvme_host_t h , nvme_ctrl_t c , const struct
nvme_fabrics_config *cfg );

like. that's the whole signature. three args. iconic. 👑

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✨ ARGUMENTS ✨

• h — the Host that the controller is gonna be attached to. it's the parent, it's the main character's support system fr. 💜
• c — the Controller that's getting connected. the one we're plugging in. ✨
• cfg — the default configuration for the controller. it's const struct nvme_fabrics_config *, so it's the vibe settings, and bestie we do not touch them. 🙈

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✨ DESCRIPTION ✨

so here's the tea 🍓: this function issues a 'connect' command off to the NVMe-oF controller, and then it sticks c into the topology, using h as its parent. that's it. that's the whole job. it's matching-making but for controllers, and honestly? slay. 💅

but listen. read this part twice, because there are two requirements and they are not optional:

• c must be initialized.
• c must not already be connected to the topology.

🚨 bestie if c isn't initialized, or if it's already chilling in the topology, we are not in a good place. the page says those requirements, and we respect the page. periodt.

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✨ RETURN ✨

• 0 on success — we ate. 🔥
• on failure, errno gets set and -1 is returned. 😭 so always check, always look at errno, don't just assume it worked because you're feeling lucky.

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✨ SEE ALSO ✨

hmm, the original page doesn't list any SEE ALSO references, so there's nothing to link here. it's giving minimalism. we love a short page but we also kinda wanted more tea. 💀

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and that's the whole page bestie ✨ this one came from the libnvme API manual, dated July 2026, and it's page nvmf_add_ctrl(2) — same function name, same section, no notes. go forth and connect responsibly. mwah. 💖🎀