diff options
author | Christoph Hellwig <hch@lst.de> | 2024-06-17 08:04:40 +0200 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2024-06-19 15:58:28 +0200 |
commit | 1122c0c1cc71f740fa4d5f14f239194e06a1d5e7 (patch) | |
tree | 690fcda48991904d6916c6f6e0f2205e37511531 /drivers/nvme/host | |
parent | block: remove blk_flush_policy (diff) | |
download | linux-1122c0c1cc71f740fa4d5f14f239194e06a1d5e7.tar.xz linux-1122c0c1cc71f740fa4d5f14f239194e06a1d5e7.zip |
block: move cache control settings out of queue->flags
Move the cache control settings into the queue_limits so that the flags
can be set atomically with the device queue frozen.
Add new features and flags field for the driver set flags, and internal
(usually sysfs-controlled) flags in the block layer. Note that we'll
eventually remove enough field from queue_limits to bring it back to the
previous size.
The disable flag is inverted compared to the previous meaning, which
means it now survives a rescan, similar to the max_sectors and
max_discard_sectors user limits.
The FLUSH and FUA flags are now inherited by blk_stack_limits, which
simplified the code in dm a lot, but also causes a slight behavior
change in that dm-switch and dm-unstripe now advertise a write cache
despite setting num_flush_bios to 0. The I/O path will handle this
gracefully, but as far as I can tell the lack of num_flush_bios
and thus flush support is a pre-existing data integrity bug in those
targets that really needs fixing, after which a non-zero num_flush_bios
should be required in dm for targets that map to underlying devices.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20240617060532.127975-14-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme/host')
-rw-r--r-- | drivers/nvme/host/core.c | 7 | ||||
-rw-r--r-- | drivers/nvme/host/multipath.c | 6 |
2 files changed, 5 insertions, 8 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 5a673fa5cb26..9fc5e36fe2e5 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2056,7 +2056,6 @@ static int nvme_update_ns_info_generic(struct nvme_ns *ns, static int nvme_update_ns_info_block(struct nvme_ns *ns, struct nvme_ns_info *info) { - bool vwc = ns->ctrl->vwc & NVME_CTRL_VWC_PRESENT; struct queue_limits lim; struct nvme_id_ns_nvm *nvm = NULL; struct nvme_zone_info zi = {}; @@ -2106,6 +2105,11 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns, ns->head->ids.csi == NVME_CSI_ZNS) nvme_update_zone_info(ns, &lim, &zi); + if (ns->ctrl->vwc & NVME_CTRL_VWC_PRESENT) + lim.features |= BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA; + else + lim.features &= ~(BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA); + /* * Register a metadata profile for PI, or the plain non-integrity NVMe * metadata masquerading as Type 0 if supported, otherwise reject block @@ -2132,7 +2136,6 @@ static int nvme_update_ns_info_block(struct nvme_ns *ns, if ((id->dlfeat & 0x7) == 0x1 && (id->dlfeat & (1 << 3))) ns->head->features |= NVME_NS_DEAC; set_disk_ro(ns->disk, nvme_ns_is_readonly(ns, info)); - blk_queue_write_cache(ns->disk->queue, vwc, vwc); set_bit(NVME_NS_READY, &ns->flags); blk_mq_unfreeze_queue(ns->disk->queue); diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 12c59db02539..3d0e23a0a4dd 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -521,7 +521,6 @@ static void nvme_requeue_work(struct work_struct *work) int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) { struct queue_limits lim; - bool vwc = false; mutex_init(&head->lock); bio_list_init(&head->requeue_list); @@ -562,11 +561,6 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) if (ctrl->tagset->nr_maps > HCTX_TYPE_POLL && ctrl->tagset->map[HCTX_TYPE_POLL].nr_queues) blk_queue_flag_set(QUEUE_FLAG_POLL, head->disk->queue); - - /* we need to propagate up the VMC settings */ - if (ctrl->vwc & NVME_CTRL_VWC_PRESENT) - vwc = true; - blk_queue_write_cache(head->disk->queue, vwc, vwc); return 0; } |