iscsi_tcp_hdr_recv_prep(9)

✨ iscsi_tcp_hdr_recv_prep(9) ✨

okay so bestie, welcome to the Kernel API Manual — this one's a tiny little function with a big job and honestly it's giving "quiet luxury." it's iscsi_tcp_hdr_recv_prep, and it lives to get a segment ready for header reception 🎀

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🌸 SYNOPSIS 🌸

void iscsi_tcp_hdr_recv_prep (struct iscsi_tcp_conn *tcp_conn );

like, that's it. that's the whole signature. void return, one argument, no notes 💅

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🦋 ARGUMENTS 🦋

• tcp_conn — the iscsi connection we're prepping for. that's the one. that's the vibe check subject 🫶

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⭐ DESCRIPTION ⭐

so here's the tea: this function always passes NULL for the crcp argument. always. no cap. 😭

and why? because when this function gets called, we literally do not know the final size of the header yet — the header is still out there living its main character life, unpinned down. so instead of guessing (never guess, bestie), we delay the digest processing until we actually know what we're dealing with. it's giving patience. it's giving "we'll handle the digest when we have the facts." periodt ✨

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👑 SEE ALSO 👑

the kernel file lives at ./drivers/scsi/libiscsi_tcp.c, and it's surrounded by an absolutely iconic friend group — go say hi to all of them:

• iscsi_tcp_segment_init_sg(9)
• iscsi_tcp_segment_map(9)
• iscsi_tcp_segment_done(9)
• iscsi_tcp_segment_recv(9)
• iscsi_tcp_cleanup_task(9)
• iscsi_tcp_data_in(9)
• iscsi_tcp_r2t_rsp(9)
• iscsi_tcp_hdr_dissect(9)
• iscsi_tcp_hdr_recv_done(9)
• iscsi_tcp_recv_segment_is_hdr(9)
• iscsi_tcp_recv_skb(9)
• iscsi_tcp_task_init(9)
• iscsi_tcp_task_xmit(9)

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lowkey reminder: the NULL for crcp isn't a bug, it's the whole point. the digest processing is being delayed on purpose until the header size is known. don't come for her 💀

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and that's the page, bestie!! sourced straight from ./drivers/scsi, dated October 2026 — mwah, go prep some segments, ily 🍓💖🧚