virtsnd_pcm_ctl_msg_alloc(9)

🎀 virtsnd_pcm_ctl_msg_alloc(9) 🎀

okay so bestie, this page is from the Kernel API Manual, and it's giving very specific kernel-internals energy 💅. The main character here is virtsnd_pcm_ctl_msg_alloc(9), and it is literally here to help you allocate and initialize the PCM device control message for the substream you specify. slay.

💖 NAME 💖

virtsnd_pcm_ctl_msg_alloc — allocate and initialize the PCM device control message for the specified substream. no cap, that's the whole vibe ✨

🌸 SYNOPSIS 🌸

struct virtio_snd_msg * virtsnd_pcm_ctl_msg_alloc (struct
virtio_pcm_substream *vss , unsigned int command , gfp_t gfp );

🦋 ARGUMENTS 🦋

• vss — VirtIO PCM substream. this is the substream you're pointing at, bestie 🫶
• command — Control request code (VIRTIO_SND_R_PCM_XXX). keep it exact, iykyk 💜
• gfp — Kernel flags for memory allocation. the memory-allocation vibe check 🎀

🔥 CONTEXT 🔥

Any context. May sleep if gfp flags permit. so like, it can snooze if the flags say it's allowed 😴✨

⭐ RETURN ⭐

Allocated message on success, NULL on failure. success = iconic message; failure = NULL, and we respect the drama 💀

🌈 SEE ALSO 🌈

• Kernel file ./sound/virtio/virtio_pcm_msg.c
• struct virtio_pcm_msg(9)
• enum pcm_msg_sg_index(9)
• virtsnd_pcm_sg_num(9)
• virtsnd_pcm_sg_from(9)
• virtsnd_pcm_msg_alloc(9)
• virtsnd_pcm_msg_free(9)
• virtsnd_pcm_msg_send(9)
• virtsnd_pcm_msg_pending_num(9)
• virtsnd_pcm_msg_complete(9)
• virtsnd_pcm_notify_cb(9)
• virtsnd_pcm_tx_notify_cb(9)
• virtsnd_pcm_rx_notify_cb(9)

okay bye bestie — this one's repping source/version ./sound/virtio, dated October 2026, and tagged virtsnd_pcm_ctl_msg_alloc(9) 💅✨ periodt.