ext2_bg_num_gdb(9)

💅 ext2_bg_num_gdb(9)

okay so bestie, this page is from the Kernel API Manual, and it's literally about the number of blocks used by the group table in a group. filesystem internals but make it cute ✨

✨ NAME ✨

ext2_bg_num_gdb — number of blocks used by the group table in group

🎀 SYNOPSIS 🎀

unsigned long ext2_bg_num_gdb (struct super_block *sb , int group );

🫶 ARGUMENTS 🫶

two little inputs, both iconic:

• sb — superblock for filesystem
• group — group number to check

💅 DESCRIPTION 💅

okay so this function returns the number of blocks used by the group descriptor table (primary or backup) in this group. slay — it's giving exactly what the name says. ✨

heads up though: in the future there may be a different number of descriptor blocks in each group. so don't get too comfy assuming it's always the same number forever, iykyk 🦋

🔥 SEE ALSO 🔥

Kernel file ./fs/ext2/balloc.c is the one serving looks, and it's linking you to all these besties:

• __rsv_window_dump(9)
• goal_in_my_reservation(9)
• search_reserve_window(9)
• rsv_window_remove(9)
• ext2_init_block_alloc_info(9)
• ext2_discard_reservation(9)
• ext2_free_blocks(9)
• bitmap_search_next_usable_block(9)
• find_next_usable_block(9)
• ext2_try_to_allocate(9)
• find_next_reservable_window(9)
• alloc_new_reservation(9)
• try_to_extend_reservation(9)
• ext2_try_to_allocate_with_rsv(9)
• ext2_has_free_blocks(9)
• ext2_bg_has_super(9)

bye bestie, mwah 💖 — this one's from ./fs/ext2, October 2026 🌸