read_cnt_show(9)

💅 read_cnt_show — kernel API manual, bestie edition 🎀

okay so this is read_cnt_show(9) from the Kernel API Manual, and honestly? she's short, she's sweet, she's giving "one job and she does it." ✨

✨ NAME ✨

read_cnt_show — return read count, like, the count of reads made from the tape drive 📼💖

✨ SYNOPSIS ✨

ssize_t read_cnt_show (struct device *dev , struct device_attribute
*attr , char *buf );

no cap, that's the whole signature. ssize_t return type, three args, we move. 🫶

✨ ARGUMENTS ✨

• dev — a struct device. literally the device, that's her 💅
• attr — the attribute structure. the ✨vibes✨ metadata of it all
• buf — the buffer where you return the formatted data in. put the pretty formatted output here bestie 🎀

🌈 SEE ALSO 🌈

Go check out the kernel file ./drivers/scsi/st.c, plus the whole friend group of 9-section functions that live in the same neighborhood — they're all linked, iykyk:

• scsi_tape_release(9)
• position_lost_in_reset_show(9)
• read_byte_cnt_show(9)
• read_ns_show(9)
• write_cnt_show(9)
• write_byte_cnt_show(9)
• write_ns_show(9)
• in_flight_show(9)
• io_ns_show(9)
• other_cnt_show(9)
• resid_cnt_show(9)

okay that's the whole page, she ate and left no crumbs 💀✨

source: ./drivers/scsi — dated October 2026, main character energy only 🌸👑

🦋 mwah, go read some tape counters 🦋