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authorMing Lei <ming.lei@redhat.com>2022-03-08 15:32:18 +0800
committerJens Axboe <axboe@kernel.dk>2022-03-08 17:57:19 -0700
commit4f481208749a22d3570073e629dbc27d7d27c8da (patch)
tree8df524f2cca05a364031383731151d6b9b8775cc /block/blk-mq.h
parentde0328d3a253a339be14a80fe2a0256ec26867da (diff)
blk-mq: prepare for implementing hctx table via xarray
It is inevitable to cause use-after-free on q->queue_hw_ctx between queue_for_each_hw_ctx() and blk_mq_update_nr_hw_queues(). And converting to xarray can fix the uaf, meantime code gets cleaner. Prepare for converting q->queue_hctx_ctx into xarray, one thing is that xa_for_each() can only accept 'unsigned long' as index, so changes type of hctx index of queue_for_each_hw_ctx() into 'unsigned long'. Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20220308073219.91173-6-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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