doc_write_oob(9)

✨ doc_write_oob(9) ✨

okay so bestie, this is the Kernel API Manual page for doc_write_oob(9) — we're doing out of band flash writes and it's lowkey iconic 💅

🎀 NAME 🎀

doc_write_oob — write out of band bytes to flash 🦋

📜 SYNOPSIS 📜

int doc_write_oob (struct mtd_info *mtd , loff_t ofs , struct
       mtd_oob_ops *ops );

🌸 ARGUMENTS 🌸

• mtd — the device 📱
• ofs — the offset from first block and first page, in bytes, aligned on page size 📏
• ops — the mtd oob structure 🧺

💖 DESCRIPTION 💖

Okay so the vibe is: Either write OOB data into a temporary buffer, for the subsequent write page. The provided OOB should be 16 bytes long. If a data buffer is provided as well, issue the page write. Or provide data without OOB, and then a all zeroed OOB will be used (ECC will still be filled in if asked for). ✨

Returns 0 is successful, EINVAL if length is not 14 bytes. And yes, bestie, both 16 bytes and 14 bytes show up here — that's literally what the page says 👀💀

🔥 SEE ALSO 🔥

Kernel file ./drivers/mtd/devices/docg3.c — and the whole squad:

• doc_delay(9), doc_read_data_area(9), doc_write_data_area(9), doc_set_reliable_mode(9), doc_set_asic_mode(9), doc_set_device_id(9), doc_set_extra_page_mode(9), doc_setup_addr_sector(9), doc_setup_writeaddr_sector(9), doc_read_seek(9), doc_write_seek(9), doc_read_page_ecc_init(9), doc_write_page_ecc_init(9), doc_ecc_disable(9), doc_hamming_ecc_init(9), doc_ecc_bch_fix_data(9), doc_read_page_prepare(9), doc_read_page_getbytes(9), doc_write_page_putbytes(9), doc_get_bch_hw_ecc(9), doc_page_finish(9), doc_read_page_finish(9), calc_block_sector(9), doc_read_oob(9), doc_block_isbad(9), doc_get_erase_count(9), doc_get_op_status(9), doc_write_erase_wait_status(9), doc_erase_block(9), doc_erase(9), doc_write_page(9), doc_guess_autoecc(9), doc_fill_autooob(9), doc_backup_oob(9), doc_set_driver_info(9), doc_probe_device(9), doc_release_device(9), docg3_resume(9), docg3_suspend(9), docg3_probe(9), docg3_release(9)

mwah 💋 this page's source/version is ./drivers/mtd/devices, dated October 2026, and it's the doc_write_oob(9) manual page. slay, go write some OOB bytes responsibly 🫶