journal_t(9)

🌸 NAME 🌸

okay so bestie, meet typedef journal_t — the icon, the main character. journal_t maintains all of the journaling state information for a single filesystem. that's it, that's the whole job, and it does it flawlessly 💅

✨ Description ✨

so like, journal_t is linked to from the fs superblock structure. yep — the superblock is basically its home base, its little dorm room 🏠

we use the journal_t to keep track of all outstanding transaction activity on the filesystem, and to manage the state of the log writing process. she's literally the group chat admin of every transaction going down, and she's also running the whole log-writing situation behind the scenes. multitasking queen 👑

🫶 heads up bestie: this is an opaque datatype. meaning you don't get to peek inside, no cap. you don't poke at her internals — you use her through the proper channels, iykyk 🙈

🦋 SEE ALSO 🦋

go check these out, they're all part of the same friend group fr fr:

• Kernel file ./include/linux/jbd2.h
• handle_t(9)
• struct jbd2_inode(9)
• struct jbd2_journal_handle(9)
• struct journal_s(9)

⭐ and that's the tea, bestie — this page came from ./include/linux, dated October 2026, and yeah it's filed under journal_t(9) 🎀 mwah, go slay your journaling 💖