ubifs_write_node(9)

🌈 ubifs_write_node(9) 🌈

okay so bestie, this page is from the Kernel API Manual, and it’s all about ubifs_write_node(9) — tiny function name, very main-character responsibilities. Let’s get into it 💅

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🌸 NAME 🌸

ubifs_write_node — write node to the media.

🎀 SYNOPSIS 🎀

int ubifs_write_node (struct ubifs_info *c , void *buf , int len , int lnum , int offs );

💖 ARGUMENTS 💖

• c — UBIFS file-system description object
• buf — the node to write
• len — node length
• lnum — logical eraseblock number
• offs — offset within the logical eraseblock

🔥 DESCRIPTION 🔥

So this function is lowkey doing a whole little backstage routine for you: it automatically fills the node magic number, assigns the sequence number, and calculates the node CRC checksum. Obsessed with an auto-pilot moment ✨

The length of the buf buffer has to be aligned to the minimal I/O unit size — no cap, that part is mandatory, bestie.

It also automatically appends the padding node and padding bytes if needed. Very “I brought snacks for everyone” energy 🫶

Return vibe check: returns zero in case of success and a negative error code in case of failure. That’s it. That’s the plot 💀

🦋 SEE ALSO 🦋

Kernel file ./fs/ubifs/io.c is the source-file bestie. The whole squad:

• ubifs_ro_mode(9)
• ubifs_check_node(9)
• ubifs_pad(9)
• next_sqnum(9)
• ubifs_prepare_node_hmac(9)
• ubifs_prepare_node(9)
• ubifs_prep_grp_node(9)
• wbuf_timer_callback_nolock(9)
• new_wbuf_timer_nolock(9)
• cancel_wbuf_timer_nolock(9)
• ubifs_wbuf_sync_nolock(9)
• ubifs_wbuf_seek_nolock(9)
• ubifs_bg_wbufs_sync(9)
• ubifs_wbuf_write_nolock(9)
• ubifs_write_node_hmac(9)
• ubifs_read_node_wbuf(9)
• ubifs_read_node(9)
• ubifs_wbuf_init(9)
• ubifs_wbuf_add_ino_nolock(9)
• wbuf_has_ino(9)
• ubifs_sync_wbufs_by_inode(9)

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mwah 💋 this little page came from source/version ./fs/ubifs, dated October 2026, and it’s titled ubifs_write_node(9) — periodt 🎀