From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Wed, 7 Aug 2024 03:30:48 +0000 (-0400)
Subject: bcachefs: ec should not allocate from ro devs
X-Git-Tag: v6.12~281^2~200
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2caca9fb166f82937110368768002511628e6e1f;p=platform%2Fkernel%2Flinux-amlogic.git

bcachefs: ec should not allocate from ro devs

This fixes a device removal deadlock when using erasure coding.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c
index 8d0cca2f14ed..84f1cbf6497f 100644
--- a/fs/bcachefs/ec.c
+++ b/fs/bcachefs/ec.c
@@ -1809,6 +1809,9 @@ static int new_stripe_alloc_buckets(struct btree_trans *trans, struct ec_stripe_
 	BUG_ON(v->nr_blocks	!= h->s->nr_data + h->s->nr_parity);
 	BUG_ON(v->nr_redundant	!= h->s->nr_parity);
 
+	/* * We bypass the sector allocator which normally does this: */
+	bitmap_and(devs.d, devs.d, c->rw_devs[BCH_DATA_user].d, BCH_SB_MEMBERS_MAX);
+
 	for_each_set_bit(i, h->s->blocks_gotten, v->nr_blocks) {
 		__clear_bit(v->ptrs[i].dev, devs.d);
 		if (i < h->s->nr_data)