fc_exch_setup_hdr(9)

💖 fc_exch_setup_hdr — the kernel API manual, bestie edition 💖

okay so you found yourself in the 9 section of the manual (that's the kernel API one, iykyk) and the function is fc_exch_setup_hdr. let's get into it ✨

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🌸 NAME 🌸

fc_exch_setup_hdr — this one initializes a FC header by setting up some of its fields and figures out the SOF and the EOF. two jobs, one function, main character energy fr fr 💅

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🎀 SYNOPSIS 🎀

void fc_exch_setup_hdr (struct fc_exch *ep , struct fc_frame *fp , u32 f_ctl );

that's the whole signature, copy it exactly bestie, no cap 🫶

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🦋 ARGUMENTS 🦋

• ep — the exchange that's gonna be using this header. it's the main character here 💜
• fp — the frame whose header is about to get modified. yes, modified. it's getting a glow-up 🌈
• f_ctl — the F_CTL bits that will be used for the frame header. fancy ✨

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🔥 DESCRIPTION 🔥

so what does this routine actually do? the fields it initializes are literally:

• fh_ox_id
• fh_rx_id
• fh_seq_id
• fh_seq_cnt
• and the SOF and the EOF

that's the list. that's the vibe check. slay 💅

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⭐ SEE ALSO ⭐

the kernel file to go look at is ./drivers/scsi/libfc/fc_exch.c — and then there's, like, the entire friend group of related pages. obsessed with how many there are. here they all are, no skips, periodt 👑

• struct fc_exch_pool(9)
• struct fc_exch_mgr(9)
• struct fc_exch_mgr_anchor(9)
• fc_exch_name_lookup(9)
• fc_exch_rctl_name(9)
• fc_exch_hold(9)
• fc_exch_release(9)
• fc_exch_timer_cancel(9)
• fc_exch_timer_set_locked(9)
• fc_exch_timer_set(9)
• fc_exch_done_locked(9)
• fc_exch_ptr_get(9)
• fc_exch_ptr_set(9)
• fc_exch_delete(9)
• fc_seq_send(9)
• fc_seq_alloc(9)
• fc_seq_start_next_locked(9)
• fc_seq_start_next(9)
• fc_exch_abort_locked(9)
• fc_seq_exch_abort(9)
• fc_invoke_resp(9)
• fc_exch_timeout(9)
• fc_exch_em_alloc(9)
• fc_exch_alloc(9)
• fc_exch_find(9)
• fc_exch_done(9)
• fc_exch_resp(9)
• fc_seq_lookup_recip(9)
• fc_seq_lookup_orig(9)
• fc_exch_set_addr(9)
• fc_seq_els_rsp_send(9)
• fc_seq_send_last(9)
• fc_seq_send_ack(9)
• fc_exch_send_ba_rjt(9)
• fc_exch_recv_abts(9)
• fc_seq_assign(9)
• fc_seq_release(9)
• fc_exch_recv_req(9)
• fc_exch_recv_seq_resp(9)
• fc_exch_recv_resp(9)
• fc_exch_abts_resp(9)
• fc_exch_recv_bls(9)
• fc_seq_ls_acc(9)
• fc_seq_ls_rjt(9)
• fc_exch_reset(9)
• fc_exch_pool_reset(9)
• fc_exch_mgr_reset(9)
• fc_exch_lookup(9)
• fc_exch_els_rec(9)
• fc_exch_rrq_resp(9)
• fc_exch_seq_send(9)
• fc_exch_rrq(9)
• fc_exch_els_rrq(9)
• fc_exch_update_stats(9)
• fc_exch_mgr_add(9)
• fc_exch_mgr_destroy(9)
• fc_exch_mgr_del(9)
• fc_exch_mgr_list_clone(9)
• fc_exch_mgr_alloc(9)
• fc_exch_mgr_free(9)
• fc_find_ema(9)
• fc_exch_recv(9)
• fc_exch_init(9)
• fc_setup_exch_mgr(9)
• fc_destroy_exch_mgr(9)

it's giving "read the whole friend group chat" 😭 but honestly? worth it 💖

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okay that's the page!! sourced from ./drivers/scsi/libfc, dated October 2026 — so like, mark your calendars bestie 🗓️💅 bye!! 🦋✨