nilfs_ioctl_do_get_bdescs(9)

okay bestie, welcome to the Kernel API Manual page for nilfs_ioctl_do_get_bdescs(9) — the one and only ✨

💖 NAME 💖

nilfs_ioctl_do_get_bdescs — the callback method getting disk block descriptors. no cap, that’s the whole vibe 💅

✨ SYNOPSIS ✨

ssize_t nilfs_ioctl_do_get_bdescs (struct the_nilfs *nilfs , __u64 *posp
, int flags , void *buf , size_t size , size_t nmembs );

🌸 ARGUMENTS 🌸

• nilfs — the nilfs object, iconic.
• posp — not used. literally not used, bestie 🙈
• flags — not used. also not used 🫶
• buf — buffer for storing array of nilfs_bdesc structures.
• size — size in bytes of one bdesc item in array.
• nmembs — count of bdescs in array.

🦋 DESCRIPTION 🦋

The nilfs_ioctl_do_get_bdescs function returns information about descriptors of disk block numbers. highkey useful for the block-descriptor lore 🔥

The NILFS_IOCTL_GET_BDESCS ioctl is used by nilfs_cleanerd daemon. that’s the main character detail, iykyk 👑

🔥 RETURN 🔥

Count of nilfs_bdescs structures in output buffer on success, or a negative error code on failure. slay when it works, sad little negative when it doesn’t 😭

🌈 SEE ALSO 🌈

• Kernel file ./fs/nilfs2/ioctl.c, nilfs_ioctl_wrap_copy(9)
• nilfs_fileattr_get(9)
• nilfs_fileattr_set(9)
• nilfs_ioctl_getversion(9)
• nilfs_ioctl_change_cpmode(9)
• nilfs_ioctl_delete_checkpoint(9)
• nilfs_ioctl_do_get_cpinfo(9)
• nilfs_ioctl_get_cpstat(9)
• nilfs_ioctl_do_get_suinfo(9)
• nilfs_ioctl_get_sustat(9)
• nilfs_ioctl_do_get_vinfo(9)
• nilfs_ioctl_get_bdescs(9)
• nilfs_ioctl_move_inode_block(9)
• nilfs_ioctl_move_blocks(9)
• nilfs_ioctl_delete_checkpoints(9)
• nilfs_ioctl_free_vblocknrs(9)
• nilfs_ioctl_mark_blocks_dirty(9)
• nilfs_ioctl_clean_segments(9)
• nilfs_ioctl_sync(9)
• nilfs_ioctl_resize(9)
• nilfs_ioctl_trim_fs(9)
• nilfs_ioctl_set_alloc_range(9)
• nilfs_ioctl_get_info(9)
• nilfs_ioctl_set_suinfo(9)
• nilfs_ioctl_get_fslabel(9)
• nilfs_ioctl_set_fslabel(9)

mwah 💋 — source/version ./fs/nilfs2, dated October 2026, and yes this is nilfs_ioctl_do_get_bdescs(9). bye bestie 🫶