lpfc_debugfs_disc_trc_open(9)

💅 lpfc_debugfs_disc_trc_open — kernel API manual, bestie edition ✨

okay so this one lives in the Kernel API Manual (yes, the kernel kernel, we're fancy now 🎀) and it's called lpfc_debugfs_disc_trc_open. say it with me: debug-effs, disc-trace, open. iconic name, lowkey a mouthful, but we move 💖

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✨ NAME ✨

lpfc_debugfs_disc_trc_open — literally just opens the discovery trace log 🦋

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🌸 SYNOPSIS 🌸

int lpfc_debugfs_disc_trc_open (struct inode *inode , struct file *file );

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🎀 ARGUMENTS 🎀

• inode — the inode pointer 💫 and bestie, this one's carrying a vport pointer inside it. it's giving "I contain multitudes."
• file — the file pointer, and its whole job is to get the log output attached to it 🫶

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💜 DESCRIPTION 💜

okay so picture this: this routine is the entry point for the debugfs open file operation. main character energy, fr fr 👑

here's the whole glow-up sequence, step by step, no cap:

1. it gets the vport from the i_private field in inode 🌈
2. it allocates the necessary buffer for the log ✨
3. it fills that buffer from the in-memory log for this vport 💅
4. and then it returns a pointer to that log in the private_data field in file 🦋

that's it, that's the vibe. in, grab, alloc, fill, point, done. ate and left no crumbs 🍓

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⭐ RETURN ⭐

this function returns zero if successful 😌💖

on error it will return a negative error value 😭 so like... check it, bestie. please. for me.

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🔥 SEE ALSO 🔥

the kernel file, in all its glory:

./drivers/scsi/lpfc/lpfc_debugfs.c

and the whole squad 👑 — every single one of these:

• lpfc_debugfs_disc_trc_data(9)
• lpfc_debugfs_slow_ring_trc_data(9)
• lpfc_debugfs_hbqinfo_data(9)
• lpfc_debugfs_commonxripools_data(9)
• lpfc_debugfs_multixripools_data(9)
• lpfc_debugfs_lockstat_data(9)
• lpfc_debugfs_dumpHBASlim_data(9)
• lpfc_debugfs_dumpHostSlim_data(9)
• lpfc_debugfs_nodelist_data(9)
• lpfc_debugfs_nvmestat_data(9)
• lpfc_debugfs_scsistat_data(9)
• lpfc_debugfs_ioktime_data(9)
• lpfc_debugfs_nvmeio_trc_data(9)
• lpfc_debugfs_hdwqstat_data(9)
• lpfc_debugfs_disc_trc(9)
• lpfc_debugfs_slow_ring_trc(9)
• lpfc_debugfs_nvme_trc(9)
• lpfc_debugfs_slow_ring_trc_open(9)
• lpfc_debugfs_hbqinfo_open(9)
• lpfc_debugfs_multixripools_open(9)
• lpfc_debugfs_lockstat_open(9)
• lpfc_debugfs_ras_log_open(9)
• lpfc_debugfs_dumpHBASlim_open(9)
• lpfc_debugfs_dumpHostSlim_open(9)
• lpfc_debugfs_nodelist_open(9)
• lpfc_debugfs_lseek(9)
• lpfc_debugfs_read(9)
• lpfc_debugfs_release(9)
• lpfc_debugfs_multixripools_write(9)
• lpfc_idiag_cmd_get(9)
• lpfc_idiag_open(9)
• lpfc_idiag_release(9)
• lpfc_idiag_cmd_release(9)
• lpfc_idiag_pcicfg_read(9)
• lpfc_idiag_pcicfg_write(9)
• lpfc_idiag_baracc_read(9)
• lpfc_idiag_baracc_write(9)
• lpfc_idiag_queinfo_read(9)
• lpfc_idiag_que_param_check(9)
• lpfc_idiag_queacc_read_qe(9)
• lpfc_idiag_queacc_read(9)
• lpfc_idiag_queacc_write(9)
• lpfc_idiag_drbacc_read_reg(9)
• lpfc_idiag_drbacc_read(9)
• lpfc_idiag_drbacc_write(9)
• lpfc_idiag_ctlacc_read_reg(9)
• lpfc_idiag_ctlacc_read(9)
• lpfc_idiag_ctlacc_write(9)
• lpfc_idiag_mbxacc_get_setup(9)
• lpfc_idiag_mbxacc_read(9)
• lpfc_idiag_mbxacc_write(9)
• lpfc_idiag_extacc_avail_get(9)
• lpfc_idiag_extacc_alloc_get(9)
• lpfc_idiag_extacc_drivr_get(9)
• lpfc_idiag_extacc_write(9)
• lpfc_idiag_extacc_read(9)
• lpfc_debugfs_initialize(9)
• lpfc_debugfs_terminate(9)
• lpfc_debug_dump_all_queues(9)

like... that's a lot of friends and I respect it 💀🫶

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ngl bestie, if you're digging through this corner of drivers/scsi/lpfc, drink some water and take a lil stretch. the trace log will still be there, I promise 💜

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okay that's the whole page!! 🌈 this little gem hails from ./drivers/scsi/lpfc, it's dated October 2026, and it's living under the Kernel API Manual banner — mwah, bye, love u, drive safe 🎀💖✨