STRUCT FC_FCP_PKT(9)

💖 NAME 💖

okay bestie, welcome to the struct fc_fcp_pkt(9) page from the Kernel API Manual! ✨

struct fc_fcp_pkt — FCP request structure (one for each scsi_cmnd request) 🫶

✨ SYNOPSIS ✨

this is the whole struct, copied exactly, no cap:

       struct fc_fcp_pkt {
           spinlock_t scsi_pkt_lock;
           refcount_t ref_cnt;
           u32 data_len;
           struct scsi_cmnd  *cmd;
           struct list_head  list;
           struct fc_lport   *lp;
           u8 state;
           u8 cdb_status;
           u8 status_code;
           u8 scsi_comp_flags;
           u32 io_status;
           u32 req_flags;
           u32 scsi_resid;
           size_t xfer_len;
           struct fcp_cmnd   cdb_cmd;
           u32 xfer_contig_end;
           u16 max_payload;
           u16 xfer_ddp;
           struct fc_rport   *rport;
           struct fc_seq     *seq_ptr;
           struct timer_list timer;
           int wait_for_comp;
           int timer_delay;
           u32 recov_retry;
           struct fc_seq     *recov_seq;
           struct completion tm_done;
        };

🧚 Members 🧚

• scsi_pkt_lock — lock to protect the SCSI packet (must be taken before the host_lock if both are to be held at the same time) 💅
• ref_cnt — reference count 🔢
• data_len — the length of the data 📏
• cmd — the SCSI command (set and clear with the host_lock held) 🫶
• list — tracks queued commands (accessed with the host_lock held) 📋
• lp — the associated local port 🌀
• state — the state of the I/O ✨
• cdb_status — CDB status 🎀
• status_code — FCP I/O status 💖
• scsi_comp_flags — completion flags (bit 3 Underrun bit 2: overrun) 🚦
• io_status — SCSI result (upper 24 bits) 💀
• req_flags — request flags (bit 0: read bit:1 write) 📝
• scsi_resid — SCSI residule length 🧮
• xfer_len — the transfer length 📦
• cdb_cmd — the CDB command 🎯
• xfer_contig_end — the offset into the buffer if the buffer is contiguous (Tx and Rx) 🧭
• max_payload — the maximum payload size (in bytes) 🧺
• xfer_ddp — indicates if this transfer used DDP (XID of the exchange will be set here if DDP was setup) 🦋
• rport — the remote port that the SCSI command is targeted at 🎯
• seq_ptr — the sequence that will carry the SCSI command 🚀
• timer — the command timer ⏰
• wait_for_comp — indicator to wait for completion of the I/O (in jiffies) ⏳
• timer_delay — FCP packet timer delay in jiffies 🕰️
• recov_retry — number of recovery retries 🔁
• recov_seq — the sequence for REC or SRR 🧵
• tm_done — completion indicator ✅

🦋 SEE ALSO 🦋

Kernel file ./include/scsi/libfc.h — plus these besties, all kept exactly: enum fc_lport_state(9), enum fc_rport_state(9), struct fc_disc_port(9), enum fc_rport_event(9), struct fc_rport_operations(9), struct fc_rport_libfc_priv(9), struct fc_rport_priv(9), struct fc_stats(9), struct fc_seq_els_data(9), struct fc_seq(9), struct fc_exch(9), struct fc_disc(9), struct fc_lport(9), struct fc4_prov(9), fc_lport_test_ready(9), fc_set_wwnn(9), fc_set_wwpn(9), fc_lport_state_enter(9), fc_lport_init_stats(9), fc_lport_free_stats(9), lport_priv(9), libfc_host_alloc(9). ✨

little sign-off bestie: source/version is ./include/scsi, date is October 2026, and the page is struct fc_fcp_pkt(9) 🫶💜✨