btrfs: fix raid stripe search missing entries at leaf boundaries

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In btrfs_delete_raid_extent(), the search key uses offset=0. When the
target stripe entry is the first item on a leaf, btrfs_search_slot()
may land on the previous leaf and decrementing the slot from nritems
still points to the wrong entry, causing the stripe extent to be
silently missed.

Fix this by searching with offset=(u64)-1 instead. Since no real stripe
entry has this offset, btrfs_search_slot() always returns 1 with the
slot pointing past the last matching objectid entry. Then unconditionally
decrement the slot with a proper slots[0]==0 early-exit check to handle
the case where no matching entry exists.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: robbieko <robbieko@synology.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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robbieko 2026-04-13 14:52:33 +08:00 • committed by David Sterba

parent 513f8a52ee

commit 2aef5cb1dc

1 changed files with 15 additions and 3 deletions

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18

fs/btrfs/raid-stripe-tree.c

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