ssh_ptl_shutdown(9)

💅 ssh_ptl_shutdown — a kernel API manual, but make it bestie

okay so real talk, this one's from the Kernel API Manual — section 9, kernel land, no cap. It's called ssh_ptl_shutdown(9) and honestly? She's the one who ends the party. Let's get into it 🎀

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✨ NAME ✨

ssh_ptl_shutdown — shuts down the packet transport layer. that's it, that's the whole vibe. she closes up shop 💅

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🌸 SYNOPSIS 🌸

void ssh_ptl_shutdown (struct ssh_ptl *ptl );

returns nothing (it's a void, she gives you closure not a return value 🫶), takes one pointer to a struct ssh_ptl.

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🦋 ARGUMENTS 🦋

• ptl — the packet transport layer itself. like, the actual one. the main character of this whole function. 👑

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💖 DESCRIPTION 💖

So what does she do? She shuts down the packet transport layer — removing and canceling every queued and pending packet. every single one. gone. 🧹✨

Packets that get canceled by this operation? They get completed with -ESHUTDOWN as their status. that's their exit ticket, that's the status code they leave with, periodt. 😭

Also — the receiver and transmitter threads get stopped. both of them. no threads left running, no loose ends, we love a clean shutdown fr fr.

As a result of this function, the transport layer gets marked as shut down. and once it's marked? submitting packets after the transport layer has been shut down will fail with -ESHUTDOWN. so like… try it if you want, but she's closed, bestie 💀

heads up: everything pending dies with -ESHUTDOWN, and post-shutdown submissions die with -ESHUTDOWN too. consistency icon honestly.

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🌈 SEE ALSO 🌈

The kernel file ./drivers/platform/surface/aggregator/ssh_packet_layer.c — yes, that's the source of truth, go read her 🍓

And the whole friend group, in order:

• ssh_ptl_should_drop_ack_packet(9)
• ssh_ptl_should_drop_nak_packet(9)
• ssh_ptl_should_drop_dsq_packet(9)
• ssh_ptl_should_fail_write(9)
• ssh_ptl_should_corrupt_tx_data(9)
• ssh_ptl_should_corrupt_rx_syn(9)
• ssh_ptl_should_corrupt_rx_data(9)
• ssh_packet_get(9)
• ssh_packet_put(9)
• ssh_packet_init(9)
• ssh_ctrl_packet_cache_init(9)
• ssh_ctrl_packet_cache_destroy(9)
• ssh_ctrl_packet_alloc(9)
• ssh_ctrl_packet_free(9)
• ssh_ptl_tx_wakeup_packet(9)
• ssh_ptl_tx_start(9)
• ssh_ptl_tx_stop(9)
• ssh_ptl_submit(9)
• ssh_ptl_cancel(9)
• ssh_ptl_rx_start(9)
• ssh_ptl_rx_stop(9)
• ssh_ptl_rx_rcvbuf(9)
• ssh_ptl_init(9)
• ssh_ptl_destroy(9)

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and that's the page!! 💜 sign-off time: this lil masterpiece lives at ./drivers/platform/surface/agg... and she's dated October 2026, under the ssh_ptl_shutdown(9) name. slay, goodbye, go shut down your transport layers responsibly 🔥👑