gfs2_rgrp_go_instantiate(9)

💖 gfs2_rgrp_go_instantiate(9) 💖

okay so real talk, bestie — this is a page straight out of the Kernel API Manual, and it's all about gfs2_rgrp_go_instantiate. she's a little function with one job and she does it flawlessly. let's get into it 🫶

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✨ NAME ✨

gfs2_rgrp_go_instantiate — read in a RG's header and bitmaps 📖

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🌸 SYNOPSIS 🌸

int gfs2_rgrp_go_instantiate (struct gfs2_glock *gl );

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🎀 ARGUMENTS 🎀

• gl — the glock representing the rgrpd to read in 💅 (yes bestie, a glock, not that kind — this is kernel-land)

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🦋 DESCRIPTION 🦋

so what she actually does: she reads in all of a Resource Group's header and bitmap blocks. like, the whole thing. every last one. no crumbs left 🌈

⚠️ important caveat, and i need you to actually listen: the caller must eventually call gfs2_rgrp_brelse to free the bitmaps. that's not optional, that's not a "later maybe", that's a you will leak if you forget situation 😭 so like. don't forget. periodt.

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⭐ RETURN ⭐

errno — she returns an errno, and that's the whole story 🔥

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👑 SEE ALSO 👑

bestie i'm not kidding, this is the whole friend group. like, the entire friend group. i'm listing every single one because they all deserve their moment 💜

Kernel file ./fs/gfs2/rgrp.c — plus:

• gfs2_setbit(9)
• gfs2_testbit(9)
• gfs2_bit_search(9)
• rs_cmp(9)
• gfs2_bitfit(9)
• gfs2_rbm_from_block(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_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 page!! 🍓 mwah 💋 this one ships from ./fs/gfs2, dated October 2026 — so like, future-coded of her honestly 🧚 stay hydrated, call gfs2_rgrp_brelse, and slay ✨