STRUCT PSZ_BUFFER(9)

🦋 struct psz_buffer(9) 🦋

okay so this is a page from the Kernel API Manual, bestie — it's all about struct psz_buffer, no cap 💅

✨ NAME ✨

struct psz_buffer — the header of a zone that gets flushed to storage 🎀

🌸 SYNOPSIS 🌸

struct psz_buffer {
  #define PSZ_SIG (0x43474244) ;
    uint32_t sig;
    atomic_t datalen;
    atomic_t start;
    uint8_t data[];
 };

🫶 Members 🫶

• sig — the signature that says "hey, I'm a header" 🎫 — literally it's PSZ_SIG xor'd with the PSZONE-type value.
• datalen — how long the data in data is 📏
• start — the offset into data where the beginning of the stored bytes actually begins 📍 like, the real starting line.
• data — the zone data itself 🗂️ periodt.

👑 SEE ALSO 👑

Kernel file ./fs/pstore/zone.c and also, in absolutely iconic alphabetical-ish order:

• struct psz_kmsg_header(9)
• struct pstore_zone(9)
• struct psz_context(9)
• enum psz_flush_mode(9)
• psz_recovery(9)
• register_pstore_zone(9)
• unregister_pstore_zone(9)

okay that's the whole vibe check 💀 this lil page lives in ./fs/pstore and it's dated October 2026 — so screenshot it & stan later, bestie 🌈⭐💜