STRUCT NILFS_SEGMENT_BUFFER(9)

💖 NAME 💖

okay so bestie, welcome to the Kernel API Manual page for struct nilfs_segment_buffer — the header title is literally struct nilfs_segment_buffer(9), and we’re folding that manual name right in here instead of copying the boring header line. The NAME entry is:

struct nilfs_segment_buffer — Segment buffer. That’s it, that’s the vibe. 🎀

✨ SYNOPSIS ✨

Here’s the struct in all its glory, copied exactly because we do not mess with code, periodt:

       struct nilfs_segment_buffer {
           struct super_block     *sb_super;
           struct list_head        sb_list;
           struct nilfs_segsum_info sb_sum;
           __u64 sb_segnum;
           __u64 sb_nextnum;
           sector_t sb_fseg_start, sb_fseg_end;
           sector_t sb_pseg_start;
           unsigned int            sb_rest_blocks;
           struct list_head        sb_segsum_buffers;
           struct list_head        sb_payload_buffers;
           struct buffer_head     *sb_super_root;
           int sb_nbio;
           atomic_t sb_err;
           struct completion       sb_bio_event;
        };

💅 Members 💅

okay now the member-by-member vibe check — every field is here, no skipping, no cap:

• sb_super — back pointer to a struct super_block; it’s giving “I know my superblock” energy. 💖
• sb_list — list head to chain this structure; the little chain-link bae. 🔗
• sb_sum — on-memory segment summary. Lowkey the memory-side summary. ✨
• sb_segnum — index number of the full segment.
• sb_nextnum — index number of the next full segment.
• sb_fseg_start — start block number of the full segment.
• sb_fseg_end — end block number of the full segment.
• sb_pseg_start — disk block number of partial segment.
• sb_rest_blocks — number of residual blocks in the current segment.
• sb_segsum_buffers — list of buffers for segment summaries.
• sb_payload_buffers — list of buffers for segment payload.
• sb_super_root — pointer to buffer storing a super root block (if exists).
• sb_nbio — number of flying bio requests.
• sb_err — I/O error status.
• sb_bio_event — completion event of log writing.

🌈 SEE ALSO 🌈

• Kernel file ./fs/nilfs2/segbuf.h
• struct nilfs_segsum_info(9)

💖 and that’s the whole page, bestie! source/version: ./fs/nilfs2 · date: October 2026 · page title: struct nilfs_segment_buffer(9) — mwah, bye! 💖