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path: root/drivers/nvme/host/core.c
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Diffstat (limited to 'drivers/nvme/host/core.c')
-rw-r--r--drivers/nvme/host/core.c89
1 files changed, 61 insertions, 28 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 7da80f375315..1b7c2afd84cb 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1257,9 +1257,9 @@ static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
return 0;
}
- effects |= nvme_known_admin_effects(opcode);
if (ctrl->effects)
effects = le32_to_cpu(ctrl->effects->acs[opcode]);
+ effects |= nvme_known_admin_effects(opcode);
/*
* For simplicity, IO to all namespaces is quiesced even if the command
@@ -1361,9 +1361,14 @@ static struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
{
#ifdef CONFIG_NVME_MULTIPATH
if (disk->fops == &nvme_ns_head_ops) {
+ struct nvme_ns *ns;
+
*head = disk->private_data;
*srcu_idx = srcu_read_lock(&(*head)->srcu);
- return nvme_find_path(*head);
+ ns = nvme_find_path(*head);
+ if (!ns)
+ srcu_read_unlock(&(*head)->srcu, *srcu_idx);
+ return ns;
}
#endif
*head = NULL;
@@ -1377,42 +1382,56 @@ static void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx)
srcu_read_unlock(&head->srcu, idx);
}
-static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned cmd, unsigned long arg)
+static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
{
+ struct nvme_ns_head *head = NULL;
+ void __user *argp = (void __user *)arg;
+ struct nvme_ns *ns;
+ int srcu_idx, ret;
+
+ ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx);
+ if (unlikely(!ns))
+ return -EWOULDBLOCK;
+
+ /*
+ * Handle ioctls that apply to the controller instead of the namespace
+ * seperately and drop the ns SRCU reference early. This avoids a
+ * deadlock when deleting namespaces using the passthrough interface.
+ */
+ if (cmd == NVME_IOCTL_ADMIN_CMD || is_sed_ioctl(cmd)) {
+ struct nvme_ctrl *ctrl = ns->ctrl;
+
+ nvme_get_ctrl(ns->ctrl);
+ nvme_put_ns_from_disk(head, srcu_idx);
+
+ if (cmd == NVME_IOCTL_ADMIN_CMD)
+ ret = nvme_user_cmd(ctrl, NULL, argp);
+ else
+ ret = sed_ioctl(ctrl->opal_dev, cmd, argp);
+
+ nvme_put_ctrl(ctrl);
+ return ret;
+ }
+
switch (cmd) {
case NVME_IOCTL_ID:
force_successful_syscall_return();
- return ns->head->ns_id;
- case NVME_IOCTL_ADMIN_CMD:
- return nvme_user_cmd(ns->ctrl, NULL, (void __user *)arg);
+ ret = ns->head->ns_id;
+ break;
case NVME_IOCTL_IO_CMD:
- return nvme_user_cmd(ns->ctrl, ns, (void __user *)arg);
+ ret = nvme_user_cmd(ns->ctrl, ns, argp);
+ break;
case NVME_IOCTL_SUBMIT_IO:
- return nvme_submit_io(ns, (void __user *)arg);
+ ret = nvme_submit_io(ns, argp);
+ break;
default:
-#ifdef CONFIG_NVM
if (ns->ndev)
- return nvme_nvm_ioctl(ns, cmd, arg);
-#endif
- if (is_sed_ioctl(cmd))
- return sed_ioctl(ns->ctrl->opal_dev, cmd,
- (void __user *) arg);
- return -ENOTTY;
+ ret = nvme_nvm_ioctl(ns, cmd, arg);
+ else
+ ret = -ENOTTY;
}
-}
-
-static int nvme_ioctl(struct block_device *bdev, fmode_t mode,
- unsigned int cmd, unsigned long arg)
-{
- struct nvme_ns_head *head = NULL;
- struct nvme_ns *ns;
- int srcu_idx, ret;
- ns = nvme_get_ns_from_disk(bdev->bd_disk, &head, &srcu_idx);
- if (unlikely(!ns))
- ret = -EWOULDBLOCK;
- else
- ret = nvme_ns_ioctl(ns, cmd, arg);
nvme_put_ns_from_disk(head, srcu_idx);
return ret;
}
@@ -2557,6 +2576,7 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
ctrl->oacs = le16_to_cpu(id->oacs);
ctrl->oncs = le16_to_cpu(id->oncs);
+ ctrl->mtfa = le16_to_cpu(id->mtfa);
ctrl->oaes = le32_to_cpu(id->oaes);
atomic_set(&ctrl->abort_limit, id->acl + 1);
ctrl->vwc = id->vwc;
@@ -3681,6 +3701,7 @@ EXPORT_SYMBOL_GPL(nvme_start_ctrl);
void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
{
+ dev_pm_qos_hide_latency_tolerance(ctrl->device);
cdev_device_del(&ctrl->cdev, ctrl->device);
}
EXPORT_SYMBOL_GPL(nvme_uninit_ctrl);
@@ -3880,6 +3901,18 @@ void nvme_start_queues(struct nvme_ctrl *ctrl)
}
EXPORT_SYMBOL_GPL(nvme_start_queues);
+
+void nvme_sync_queues(struct nvme_ctrl *ctrl)
+{
+ struct nvme_ns *ns;
+
+ down_read(&ctrl->namespaces_rwsem);
+ list_for_each_entry(ns, &ctrl->namespaces, list)
+ blk_sync_queue(ns->queue);
+ up_read(&ctrl->namespaces_rwsem);
+}
+EXPORT_SYMBOL_GPL(nvme_sync_queues);
+
/*
* Check we didn't inadvertently grow the command structure sizes:
*/