738 lines
19 KiB
C
738 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2017-2018 Christoph Hellwig.
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*/
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#include <linux/moduleparam.h>
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#include <trace/events/block.h>
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#include "nvme.h"
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static bool multipath = true;
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module_param(multipath, bool, 0444);
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MODULE_PARM_DESC(multipath,
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"turn on native support for multiple controllers per subsystem");
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void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
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{
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struct nvme_ns_head *h;
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lockdep_assert_held(&subsys->lock);
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list_for_each_entry(h, &subsys->nsheads, entry)
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if (h->disk)
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blk_mq_unfreeze_queue(h->disk->queue);
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}
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void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
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{
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struct nvme_ns_head *h;
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lockdep_assert_held(&subsys->lock);
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list_for_each_entry(h, &subsys->nsheads, entry)
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if (h->disk)
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blk_mq_freeze_queue_wait(h->disk->queue);
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}
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void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
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{
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struct nvme_ns_head *h;
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lockdep_assert_held(&subsys->lock);
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list_for_each_entry(h, &subsys->nsheads, entry)
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if (h->disk)
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blk_freeze_queue_start(h->disk->queue);
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}
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/*
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* If multipathing is enabled we need to always use the subsystem instance
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* number for numbering our devices to avoid conflicts between subsystems that
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* have multiple controllers and thus use the multipath-aware subsystem node
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* and those that have a single controller and use the controller node
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* directly.
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*/
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void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
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struct nvme_ctrl *ctrl, int *flags)
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{
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if (!multipath) {
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sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
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} else if (ns->head->disk) {
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sprintf(disk_name, "nvme%dc%dn%d", ctrl->subsys->instance,
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ctrl->instance, ns->head->instance);
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*flags = GENHD_FL_HIDDEN;
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} else {
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sprintf(disk_name, "nvme%dn%d", ctrl->subsys->instance,
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ns->head->instance);
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}
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}
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void nvme_failover_req(struct request *req)
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{
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struct nvme_ns *ns = req->q->queuedata;
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u16 status = nvme_req(req)->status;
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unsigned long flags;
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spin_lock_irqsave(&ns->head->requeue_lock, flags);
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blk_steal_bios(&ns->head->requeue_list, req);
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spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
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blk_mq_end_request(req, 0);
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switch (status & 0x7ff) {
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case NVME_SC_ANA_TRANSITION:
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case NVME_SC_ANA_INACCESSIBLE:
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case NVME_SC_ANA_PERSISTENT_LOSS:
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/*
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* If we got back an ANA error we know the controller is alive,
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* but not ready to serve this namespaces. The spec suggests
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* we should update our general state here, but due to the fact
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* that the admin and I/O queues are not serialized that is
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* fundamentally racy. So instead just clear the current path,
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* mark the the path as pending and kick of a re-read of the ANA
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* log page ASAP.
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*/
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nvme_mpath_clear_current_path(ns);
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if (ns->ctrl->ana_log_buf) {
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set_bit(NVME_NS_ANA_PENDING, &ns->flags);
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queue_work(nvme_wq, &ns->ctrl->ana_work);
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}
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break;
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case NVME_SC_HOST_PATH_ERROR:
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case NVME_SC_HOST_ABORTED_CMD:
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/*
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* Temporary transport disruption in talking to the controller.
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* Try to send on a new path.
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*/
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nvme_mpath_clear_current_path(ns);
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break;
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default:
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/*
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* Reset the controller for any non-ANA error as we don't know
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* what caused the error.
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*/
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nvme_reset_ctrl(ns->ctrl);
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break;
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}
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kblockd_schedule_work(&ns->head->requeue_work);
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}
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void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
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{
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struct nvme_ns *ns;
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down_read(&ctrl->namespaces_rwsem);
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list_for_each_entry(ns, &ctrl->namespaces, list) {
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if (ns->head->disk)
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kblockd_schedule_work(&ns->head->requeue_work);
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}
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up_read(&ctrl->namespaces_rwsem);
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}
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static const char *nvme_ana_state_names[] = {
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[0] = "invalid state",
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[NVME_ANA_OPTIMIZED] = "optimized",
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[NVME_ANA_NONOPTIMIZED] = "non-optimized",
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[NVME_ANA_INACCESSIBLE] = "inaccessible",
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[NVME_ANA_PERSISTENT_LOSS] = "persistent-loss",
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[NVME_ANA_CHANGE] = "change",
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};
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bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
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{
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struct nvme_ns_head *head = ns->head;
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bool changed = false;
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int node;
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if (!head)
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goto out;
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for_each_node(node) {
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if (ns == rcu_access_pointer(head->current_path[node])) {
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rcu_assign_pointer(head->current_path[node], NULL);
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changed = true;
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}
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}
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out:
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return changed;
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}
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void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
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{
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struct nvme_ns *ns;
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mutex_lock(&ctrl->scan_lock);
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down_read(&ctrl->namespaces_rwsem);
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list_for_each_entry(ns, &ctrl->namespaces, list)
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if (nvme_mpath_clear_current_path(ns))
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kblockd_schedule_work(&ns->head->requeue_work);
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up_read(&ctrl->namespaces_rwsem);
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mutex_unlock(&ctrl->scan_lock);
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}
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static bool nvme_path_is_disabled(struct nvme_ns *ns)
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{
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return ns->ctrl->state != NVME_CTRL_LIVE ||
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test_bit(NVME_NS_ANA_PENDING, &ns->flags) ||
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test_bit(NVME_NS_REMOVING, &ns->flags);
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}
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static struct nvme_ns *__nvme_find_path(struct nvme_ns_head *head, int node)
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{
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int found_distance = INT_MAX, fallback_distance = INT_MAX, distance;
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struct nvme_ns *found = NULL, *fallback = NULL, *ns;
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list_for_each_entry_rcu(ns, &head->list, siblings) {
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if (nvme_path_is_disabled(ns))
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continue;
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if (READ_ONCE(head->subsys->iopolicy) == NVME_IOPOLICY_NUMA)
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distance = node_distance(node, ns->ctrl->numa_node);
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else
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distance = LOCAL_DISTANCE;
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switch (ns->ana_state) {
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case NVME_ANA_OPTIMIZED:
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if (distance < found_distance) {
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found_distance = distance;
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found = ns;
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}
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break;
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case NVME_ANA_NONOPTIMIZED:
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if (distance < fallback_distance) {
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fallback_distance = distance;
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fallback = ns;
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}
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break;
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default:
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break;
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}
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}
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if (!found)
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found = fallback;
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if (found)
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rcu_assign_pointer(head->current_path[node], found);
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return found;
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}
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static struct nvme_ns *nvme_next_ns(struct nvme_ns_head *head,
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struct nvme_ns *ns)
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{
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ns = list_next_or_null_rcu(&head->list, &ns->siblings, struct nvme_ns,
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siblings);
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if (ns)
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return ns;
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return list_first_or_null_rcu(&head->list, struct nvme_ns, siblings);
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}
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static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
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int node, struct nvme_ns *old)
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{
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struct nvme_ns *ns, *found, *fallback = NULL;
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if (list_is_singular(&head->list)) {
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if (nvme_path_is_disabled(old))
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return NULL;
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return old;
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}
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for (ns = nvme_next_ns(head, old);
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ns != old;
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ns = nvme_next_ns(head, ns)) {
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if (nvme_path_is_disabled(ns))
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continue;
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if (ns->ana_state == NVME_ANA_OPTIMIZED) {
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found = ns;
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goto out;
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}
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if (ns->ana_state == NVME_ANA_NONOPTIMIZED)
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fallback = ns;
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}
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if (!fallback)
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return NULL;
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found = fallback;
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out:
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rcu_assign_pointer(head->current_path[node], found);
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return found;
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}
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static inline bool nvme_path_is_optimized(struct nvme_ns *ns)
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{
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return ns->ctrl->state == NVME_CTRL_LIVE &&
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ns->ana_state == NVME_ANA_OPTIMIZED;
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}
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inline struct nvme_ns *nvme_find_path(struct nvme_ns_head *head)
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{
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int node = numa_node_id();
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struct nvme_ns *ns;
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ns = srcu_dereference(head->current_path[node], &head->srcu);
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if (READ_ONCE(head->subsys->iopolicy) == NVME_IOPOLICY_RR && ns)
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ns = nvme_round_robin_path(head, node, ns);
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if (unlikely(!ns || !nvme_path_is_optimized(ns)))
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ns = __nvme_find_path(head, node);
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return ns;
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}
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static bool nvme_available_path(struct nvme_ns_head *head)
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{
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struct nvme_ns *ns;
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list_for_each_entry_rcu(ns, &head->list, siblings) {
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switch (ns->ctrl->state) {
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case NVME_CTRL_LIVE:
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case NVME_CTRL_RESETTING:
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case NVME_CTRL_CONNECTING:
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/* fallthru */
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return true;
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default:
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break;
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}
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}
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return false;
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}
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static blk_qc_t nvme_ns_head_make_request(struct request_queue *q,
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struct bio *bio)
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{
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struct nvme_ns_head *head = q->queuedata;
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struct device *dev = disk_to_dev(head->disk);
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struct nvme_ns *ns;
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blk_qc_t ret = BLK_QC_T_NONE;
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int srcu_idx;
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/*
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* The namespace might be going away and the bio might
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* be moved to a different queue via blk_steal_bios(),
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* so we need to use the bio_split pool from the original
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* queue to allocate the bvecs from.
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*/
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blk_queue_split(q, &bio);
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srcu_idx = srcu_read_lock(&head->srcu);
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ns = nvme_find_path(head);
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if (likely(ns)) {
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bio->bi_disk = ns->disk;
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bio->bi_opf |= REQ_NVME_MPATH;
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trace_block_bio_remap(bio->bi_disk->queue, bio,
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disk_devt(ns->head->disk),
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bio->bi_iter.bi_sector);
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ret = direct_make_request(bio);
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} else if (nvme_available_path(head)) {
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dev_warn_ratelimited(dev, "no usable path - requeuing I/O\n");
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spin_lock_irq(&head->requeue_lock);
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bio_list_add(&head->requeue_list, bio);
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spin_unlock_irq(&head->requeue_lock);
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} else {
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dev_warn_ratelimited(dev, "no available path - failing I/O\n");
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bio->bi_status = BLK_STS_IOERR;
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bio_endio(bio);
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}
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srcu_read_unlock(&head->srcu, srcu_idx);
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return ret;
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}
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static void nvme_requeue_work(struct work_struct *work)
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{
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struct nvme_ns_head *head =
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container_of(work, struct nvme_ns_head, requeue_work);
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struct bio *bio, *next;
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spin_lock_irq(&head->requeue_lock);
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next = bio_list_get(&head->requeue_list);
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spin_unlock_irq(&head->requeue_lock);
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while ((bio = next) != NULL) {
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next = bio->bi_next;
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bio->bi_next = NULL;
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/*
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* Reset disk to the mpath node and resubmit to select a new
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* path.
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*/
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bio->bi_disk = head->disk;
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generic_make_request(bio);
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}
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}
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int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
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{
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struct request_queue *q;
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bool vwc = false;
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mutex_init(&head->lock);
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bio_list_init(&head->requeue_list);
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spin_lock_init(&head->requeue_lock);
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INIT_WORK(&head->requeue_work, nvme_requeue_work);
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/*
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* Add a multipath node if the subsystems supports multiple controllers.
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* We also do this for private namespaces as the namespace sharing data could
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* change after a rescan.
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*/
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if (!(ctrl->subsys->cmic & (1 << 1)) || !multipath)
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return 0;
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q = blk_alloc_queue_node(GFP_KERNEL, ctrl->numa_node);
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if (!q)
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goto out;
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q->queuedata = head;
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blk_queue_make_request(q, nvme_ns_head_make_request);
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blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
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/* set to a default value for 512 until disk is validated */
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blk_queue_logical_block_size(q, 512);
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blk_set_stacking_limits(&q->limits);
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/* we need to propagate up the VMC settings */
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if (ctrl->vwc & NVME_CTRL_VWC_PRESENT)
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vwc = true;
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blk_queue_write_cache(q, vwc, vwc);
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head->disk = alloc_disk(0);
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if (!head->disk)
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goto out_cleanup_queue;
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head->disk->fops = &nvme_ns_head_ops;
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head->disk->private_data = head;
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head->disk->queue = q;
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head->disk->flags = GENHD_FL_EXT_DEVT;
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sprintf(head->disk->disk_name, "nvme%dn%d",
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ctrl->subsys->instance, head->instance);
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return 0;
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out_cleanup_queue:
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blk_cleanup_queue(q);
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out:
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return -ENOMEM;
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}
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static void nvme_mpath_set_live(struct nvme_ns *ns)
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{
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struct nvme_ns_head *head = ns->head;
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lockdep_assert_held(&ns->head->lock);
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if (!head->disk)
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return;
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if (!(head->disk->flags & GENHD_FL_UP))
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device_add_disk(&head->subsys->dev, head->disk,
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nvme_ns_id_attr_groups);
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if (nvme_path_is_optimized(ns)) {
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int node, srcu_idx;
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srcu_idx = srcu_read_lock(&head->srcu);
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for_each_node(node)
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__nvme_find_path(head, node);
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srcu_read_unlock(&head->srcu, srcu_idx);
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}
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synchronize_srcu(&ns->head->srcu);
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kblockd_schedule_work(&ns->head->requeue_work);
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}
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|
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static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data,
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int (*cb)(struct nvme_ctrl *ctrl, struct nvme_ana_group_desc *,
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void *))
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{
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void *base = ctrl->ana_log_buf;
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size_t offset = sizeof(struct nvme_ana_rsp_hdr);
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int error, i;
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lockdep_assert_held(&ctrl->ana_lock);
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for (i = 0; i < le16_to_cpu(ctrl->ana_log_buf->ngrps); i++) {
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struct nvme_ana_group_desc *desc = base + offset;
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u32 nr_nsids = le32_to_cpu(desc->nnsids);
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size_t nsid_buf_size = nr_nsids * sizeof(__le32);
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if (WARN_ON_ONCE(desc->grpid == 0))
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return -EINVAL;
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if (WARN_ON_ONCE(le32_to_cpu(desc->grpid) > ctrl->anagrpmax))
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return -EINVAL;
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if (WARN_ON_ONCE(desc->state == 0))
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return -EINVAL;
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if (WARN_ON_ONCE(desc->state > NVME_ANA_CHANGE))
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return -EINVAL;
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|
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offset += sizeof(*desc);
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if (WARN_ON_ONCE(offset > ctrl->ana_log_size - nsid_buf_size))
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return -EINVAL;
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|
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error = cb(ctrl, desc, data);
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if (error)
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return error;
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|
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offset += nsid_buf_size;
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if (WARN_ON_ONCE(offset > ctrl->ana_log_size - sizeof(*desc)))
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return -EINVAL;
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}
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|
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return 0;
|
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}
|
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|
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static inline bool nvme_state_is_live(enum nvme_ana_state state)
|
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{
|
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return state == NVME_ANA_OPTIMIZED || state == NVME_ANA_NONOPTIMIZED;
|
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}
|
|
|
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static void nvme_update_ns_ana_state(struct nvme_ana_group_desc *desc,
|
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struct nvme_ns *ns)
|
|
{
|
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mutex_lock(&ns->head->lock);
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ns->ana_grpid = le32_to_cpu(desc->grpid);
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ns->ana_state = desc->state;
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clear_bit(NVME_NS_ANA_PENDING, &ns->flags);
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|
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if (nvme_state_is_live(ns->ana_state))
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nvme_mpath_set_live(ns);
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mutex_unlock(&ns->head->lock);
|
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}
|
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|
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static int nvme_update_ana_state(struct nvme_ctrl *ctrl,
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struct nvme_ana_group_desc *desc, void *data)
|
|
{
|
|
u32 nr_nsids = le32_to_cpu(desc->nnsids), n = 0;
|
|
unsigned *nr_change_groups = data;
|
|
struct nvme_ns *ns;
|
|
|
|
dev_dbg(ctrl->device, "ANA group %d: %s.\n",
|
|
le32_to_cpu(desc->grpid),
|
|
nvme_ana_state_names[desc->state]);
|
|
|
|
if (desc->state == NVME_ANA_CHANGE)
|
|
(*nr_change_groups)++;
|
|
|
|
if (!nr_nsids)
|
|
return 0;
|
|
|
|
down_write(&ctrl->namespaces_rwsem);
|
|
list_for_each_entry(ns, &ctrl->namespaces, list) {
|
|
unsigned nsid = le32_to_cpu(desc->nsids[n]);
|
|
|
|
if (ns->head->ns_id < nsid)
|
|
continue;
|
|
if (ns->head->ns_id == nsid)
|
|
nvme_update_ns_ana_state(desc, ns);
|
|
if (++n == nr_nsids)
|
|
break;
|
|
}
|
|
up_write(&ctrl->namespaces_rwsem);
|
|
return 0;
|
|
}
|
|
|
|
static int nvme_read_ana_log(struct nvme_ctrl *ctrl)
|
|
{
|
|
u32 nr_change_groups = 0;
|
|
int error;
|
|
|
|
mutex_lock(&ctrl->ana_lock);
|
|
error = nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_ANA, 0,
|
|
ctrl->ana_log_buf, ctrl->ana_log_size, 0);
|
|
if (error) {
|
|
dev_warn(ctrl->device, "Failed to get ANA log: %d\n", error);
|
|
goto out_unlock;
|
|
}
|
|
|
|
error = nvme_parse_ana_log(ctrl, &nr_change_groups,
|
|
nvme_update_ana_state);
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
/*
|
|
* In theory we should have an ANATT timer per group as they might enter
|
|
* the change state at different times. But that is a lot of overhead
|
|
* just to protect against a target that keeps entering new changes
|
|
* states while never finishing previous ones. But we'll still
|
|
* eventually time out once all groups are in change state, so this
|
|
* isn't a big deal.
|
|
*
|
|
* We also double the ANATT value to provide some slack for transports
|
|
* or AEN processing overhead.
|
|
*/
|
|
if (nr_change_groups)
|
|
mod_timer(&ctrl->anatt_timer, ctrl->anatt * HZ * 2 + jiffies);
|
|
else
|
|
del_timer_sync(&ctrl->anatt_timer);
|
|
out_unlock:
|
|
mutex_unlock(&ctrl->ana_lock);
|
|
return error;
|
|
}
|
|
|
|
static void nvme_ana_work(struct work_struct *work)
|
|
{
|
|
struct nvme_ctrl *ctrl = container_of(work, struct nvme_ctrl, ana_work);
|
|
|
|
nvme_read_ana_log(ctrl);
|
|
}
|
|
|
|
static void nvme_anatt_timeout(struct timer_list *t)
|
|
{
|
|
struct nvme_ctrl *ctrl = from_timer(ctrl, t, anatt_timer);
|
|
|
|
dev_info(ctrl->device, "ANATT timeout, resetting controller.\n");
|
|
nvme_reset_ctrl(ctrl);
|
|
}
|
|
|
|
void nvme_mpath_stop(struct nvme_ctrl *ctrl)
|
|
{
|
|
if (!nvme_ctrl_use_ana(ctrl))
|
|
return;
|
|
del_timer_sync(&ctrl->anatt_timer);
|
|
cancel_work_sync(&ctrl->ana_work);
|
|
}
|
|
|
|
#define SUBSYS_ATTR_RW(_name, _mode, _show, _store) \
|
|
struct device_attribute subsys_attr_##_name = \
|
|
__ATTR(_name, _mode, _show, _store)
|
|
|
|
static const char *nvme_iopolicy_names[] = {
|
|
[NVME_IOPOLICY_NUMA] = "numa",
|
|
[NVME_IOPOLICY_RR] = "round-robin",
|
|
};
|
|
|
|
static ssize_t nvme_subsys_iopolicy_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct nvme_subsystem *subsys =
|
|
container_of(dev, struct nvme_subsystem, dev);
|
|
|
|
return sprintf(buf, "%s\n",
|
|
nvme_iopolicy_names[READ_ONCE(subsys->iopolicy)]);
|
|
}
|
|
|
|
static ssize_t nvme_subsys_iopolicy_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct nvme_subsystem *subsys =
|
|
container_of(dev, struct nvme_subsystem, dev);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(nvme_iopolicy_names); i++) {
|
|
if (sysfs_streq(buf, nvme_iopolicy_names[i])) {
|
|
WRITE_ONCE(subsys->iopolicy, i);
|
|
return count;
|
|
}
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
SUBSYS_ATTR_RW(iopolicy, S_IRUGO | S_IWUSR,
|
|
nvme_subsys_iopolicy_show, nvme_subsys_iopolicy_store);
|
|
|
|
static ssize_t ana_grpid_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", nvme_get_ns_from_dev(dev)->ana_grpid);
|
|
}
|
|
DEVICE_ATTR_RO(ana_grpid);
|
|
|
|
static ssize_t ana_state_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
|
|
|
|
return sprintf(buf, "%s\n", nvme_ana_state_names[ns->ana_state]);
|
|
}
|
|
DEVICE_ATTR_RO(ana_state);
|
|
|
|
static int nvme_set_ns_ana_state(struct nvme_ctrl *ctrl,
|
|
struct nvme_ana_group_desc *desc, void *data)
|
|
{
|
|
struct nvme_ns *ns = data;
|
|
|
|
if (ns->ana_grpid == le32_to_cpu(desc->grpid)) {
|
|
nvme_update_ns_ana_state(desc, ns);
|
|
return -ENXIO; /* just break out of the loop */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id)
|
|
{
|
|
if (nvme_ctrl_use_ana(ns->ctrl)) {
|
|
mutex_lock(&ns->ctrl->ana_lock);
|
|
ns->ana_grpid = le32_to_cpu(id->anagrpid);
|
|
nvme_parse_ana_log(ns->ctrl, ns, nvme_set_ns_ana_state);
|
|
mutex_unlock(&ns->ctrl->ana_lock);
|
|
} else {
|
|
mutex_lock(&ns->head->lock);
|
|
ns->ana_state = NVME_ANA_OPTIMIZED;
|
|
nvme_mpath_set_live(ns);
|
|
mutex_unlock(&ns->head->lock);
|
|
}
|
|
}
|
|
|
|
void nvme_mpath_remove_disk(struct nvme_ns_head *head)
|
|
{
|
|
if (!head->disk)
|
|
return;
|
|
if (head->disk->flags & GENHD_FL_UP)
|
|
del_gendisk(head->disk);
|
|
blk_set_queue_dying(head->disk->queue);
|
|
/* make sure all pending bios are cleaned up */
|
|
kblockd_schedule_work(&head->requeue_work);
|
|
flush_work(&head->requeue_work);
|
|
blk_cleanup_queue(head->disk->queue);
|
|
put_disk(head->disk);
|
|
}
|
|
|
|
int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
|
|
{
|
|
int error;
|
|
|
|
/* check if multipath is enabled and we have the capability */
|
|
if (!multipath || !ctrl->subsys || !(ctrl->subsys->cmic & (1 << 3)))
|
|
return 0;
|
|
|
|
ctrl->anacap = id->anacap;
|
|
ctrl->anatt = id->anatt;
|
|
ctrl->nanagrpid = le32_to_cpu(id->nanagrpid);
|
|
ctrl->anagrpmax = le32_to_cpu(id->anagrpmax);
|
|
|
|
mutex_init(&ctrl->ana_lock);
|
|
timer_setup(&ctrl->anatt_timer, nvme_anatt_timeout, 0);
|
|
ctrl->ana_log_size = sizeof(struct nvme_ana_rsp_hdr) +
|
|
ctrl->nanagrpid * sizeof(struct nvme_ana_group_desc);
|
|
ctrl->ana_log_size += ctrl->max_namespaces * sizeof(__le32);
|
|
|
|
if (ctrl->ana_log_size > ctrl->max_hw_sectors << SECTOR_SHIFT) {
|
|
dev_err(ctrl->device,
|
|
"ANA log page size (%zd) larger than MDTS (%d).\n",
|
|
ctrl->ana_log_size,
|
|
ctrl->max_hw_sectors << SECTOR_SHIFT);
|
|
dev_err(ctrl->device, "disabling ANA support.\n");
|
|
return 0;
|
|
}
|
|
|
|
INIT_WORK(&ctrl->ana_work, nvme_ana_work);
|
|
kfree(ctrl->ana_log_buf);
|
|
ctrl->ana_log_buf = kmalloc(ctrl->ana_log_size, GFP_KERNEL);
|
|
if (!ctrl->ana_log_buf) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
error = nvme_read_ana_log(ctrl);
|
|
if (error)
|
|
goto out_free_ana_log_buf;
|
|
return 0;
|
|
out_free_ana_log_buf:
|
|
kfree(ctrl->ana_log_buf);
|
|
ctrl->ana_log_buf = NULL;
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
|
|
{
|
|
kfree(ctrl->ana_log_buf);
|
|
ctrl->ana_log_buf = NULL;
|
|
}
|
|
|