ubifs_umount(9)

💅 ubifs_umount — the Kernel API Manual tea 🫶

ok so bestie, you're looking at ubifs_umount(9) from the Kernel API Manual, and honestly? she's a cleanup girlie and we respect her for it ✨

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🌸 NAME 🌸

ubifs_umount — un-mount UBIFS file-system. literally that's her whole job, no cap 💖

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🦋 SYNOPSIS 🦋

void ubifs_umount (struct ubifs_info *c );

returns void, so like… she doesn't report back. she just does it. main character energy fr fr 👑

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🎀 ARGUMENTS 🎀

• c — the UBIFS file-system description object. iconic struct, she's the whole context of the filesystem, hand her over and let her cook 🍓

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✨ DESCRIPTION ✨

okay so here's the vibe check 👀 — this function gets called to free allocated resources when un-mounting, and also to free resources when an error happened while we were literally halfway through mounting (aka the error path cleanup function 😭).

and the way that this matters: since she shows up in both situations, she has to make sure the resource was actually allocated before freeing it. no just vibing through and freeing stuff that was never there, that's not the move 💀 she checks first. periodt.

lowkey important: she's a double-duty cleanup icon — normal un-mount and mid-mount error cleanup — so the "was this even allocated tho" check is not optional, it's the whole assignment 🎀

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🌈 SEE ALSO 🌈

Kernel file ./fs/ubifs/super.c, plus the whole friend group:

• validate_inode(9)
• init_constants_early(9)
• bud_wbuf_callback(9)
• take_gc_lnum(9)
• alloc_wbufs(9)
• free_wbufs(9)
• free_orphans(9)
• free_buds(9)
• check_volume_empty(9)
• ubifs_parse_param(9)
• destroy_journal(9)
• bu_init(9)
• check_free_space(9)
• mount_ubifs(9)
• ubifs_remount_rw(9)
• ubifs_remount_ro(9)
• open_ubi(9)

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💜 go read them, iykyk. that's the syllabus bestie 🧚

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and that's the page! brought to you from ./fs/ubifs, dated October 2026 — mwah, love u, go unmount responsibly 💅💖