gfs2_rbm_from_block(9)

💫 gfs2_rbm_from_block(9) 💫

okay so bestie, welcome to the <pink>gfs2_rbm_from_block</pink> page from the Kernel API Manual — this is the one that sets up your rbm for you, and honestly? it's giving "small function, big responsibility" energy. let's get into it 🫶

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✨ NAME ✨

gfs2_rbm_from_block — set the rbm based upon rgd and block number 🎀

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🌸 SYNOPSIS 🌸

int gfs2_rbm_from_block (struct gfs2_rbm *rbm , u64 block );

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🦋 ARGUMENTS 🦋

• rbm — the rbm, with rgd already set correctly (this part is literally on you, bestie — it's a prerequisite, not a suggestion 💅)
• block — the block number, and it's filesystem relative so don't come at it with anything else fr fr

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💖 DESCRIPTION 💖

so what this does: it sets the bi and offset members of an rbm, based on a resource group plus a filesystem relative block number. iconic behaviour, no notes.

heads up though — the resource group must be set in the rbm on entry. like, non-negotiable. the bi and offset members are the ones this function fills in for you, so don't go pre-setting those and expecting a vibe check to save you 😭

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⭐ RETURN ⭐

0 on success, or an error code. that's it, that's the whole story 🍓

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🔥 SEE ALSO 🔥

the whole crew, and yes we're listing every single one because nobody gets left behind 👑

• Kernel file ./fs/gfs2/rgrp.c — the source itself, main character energy
• gfs2_setbit(9)
• gfs2_testbit(9)
• gfs2_bit_search(9)
• rs_cmp(9)
• gfs2_bitfit(9)
• gfs2_rbm_add(9)
• gfs2_unaligned_extlen(9)
• gfs2_free_extlen(9)
• gfs2_bitcount(9)
• gfs2_rgrp_verify(9)
• gfs2_blk2rgrpd(9)
• gfs2_rgrpd_get_first(9)
• gfs2_rgrpd_get_next(9)
• __rs_deltree(9)
• gfs2_rs_deltree(9)
• gfs2_rs_delete(9)
• return_all_reservations(9)
• compute_bitstructs(9)
• gfs2_ri_total(9)
• read_rindex_entry(9)
• set_rgrp_preferences(9)
• gfs2_ri_update(9)
• gfs2_rindex_update(9)
• gfs2_rgrp_go_instantiate(9)
• gfs2_rgrp_brelse(9)
• gfs2_fitrim(9)
• rs_insert(9)
• rgd_free(9)
• rg_mblk_search(9)
• gfs2_next_unreserved_block(9)
• gfs2_reservation_check_and_update(9)
• gfs2_rbm_find(9)
• try_rgrp_unlink(9)
• gfs2_rgrp_congested(9)
• gfs2_rgrp_used_recently(9)
• fast_to_acquire(9)
• gfs2_inplace_reserve(9)
• gfs2_inplace_release(9)
• gfs2_alloc_extent(9)
• rgblk_free(9)
• gfs2_rgrp_dump(9)
• gfs2_adjust_reservation(9)
• gfs2_set_alloc_start(9)
• gfs2_alloc_blocks(9)
• __gfs2_free_blocks(9)
• gfs2_free_meta(9)
• gfs2_check_blk_type(9)
• gfs2_rlist_add(9)
• gfs2_rlist_alloc(9)
• gfs2_rlist_free(9)

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and that's the whole page, bestie!! 🧚💜 this lil gem lives in ./fs/gfs2, it's dated October 2026, and the manual footer stamps it as gfs2_rbm_from_block(9) — so go forth, set those bi and offset members, and slay ✨💅