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authorChristoph Hellwig <hch@lst.de>2018-05-25 16:41:54 +0300
committerChristoph Hellwig <hch@lst.de>2018-05-31 19:46:46 +0300
commitcc456b65b739e17e8b1e6b61cc2f014f225ba466 (patch)
tree39e9442baf11c344ae8ca804863c7b4b0b3523f2 /drivers/nvme/host/fabrics.c
parentfe4a97918de02d5c656f29664770e335df12e090 (diff)
downloadlinux-cc456b65b739e17e8b1e6b61cc2f014f225ba466.tar.xz
nvme-fabrics: allow internal passthrough command on deleting controllers
Without this we can't cleanly shut down. Based on analysis an an earlier patch from Hannes Reinecke. Fixes: bb06ec31452f ("nvme: expand nvmf_check_if_ready checks") Reported-by: Hannes Reinecke <hare@suse.de> Tested-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: James Smart <james.smart@broadcom.com>
Diffstat (limited to 'drivers/nvme/host/fabrics.c')
-rw-r--r--drivers/nvme/host/fabrics.c79
1 files changed, 31 insertions, 48 deletions
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index aa318136460e..5f5f7067c41d 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -545,71 +545,54 @@ blk_status_t nvmf_check_if_ready(struct nvme_ctrl *ctrl, struct request *rq,
return BLK_STS_OK;
switch (ctrl->state) {
- case NVME_CTRL_DELETING:
- goto reject_io;
-
case NVME_CTRL_NEW:
case NVME_CTRL_CONNECTING:
+ case NVME_CTRL_DELETING:
+ /*
+ * This is the case of starting a new or deleting an association
+ * but connectivity was lost before it was fully created or torn
+ * down. We need to error the commands used to initialize the
+ * controller so the reconnect can go into a retry attempt. The
+ * commands should all be marked REQ_FAILFAST_DRIVER, which will
+ * hit the reject path below. Anything else will be queued while
+ * the state settles.
+ */
if (!is_connected)
- /*
- * This is the case of starting a new
- * association but connectivity was lost
- * before it was fully created. We need to
- * error the commands used to initialize the
- * controller so the reconnect can go into a
- * retry attempt. The commands should all be
- * marked REQ_FAILFAST_DRIVER, which will hit
- * the reject path below. Anything else will
- * be queued while the state settles.
- */
- goto reject_or_queue_io;
-
- if ((queue_live &&
- !(nvme_req(rq)->flags & NVME_REQ_USERCMD)) ||
- (!queue_live && blk_rq_is_passthrough(rq) &&
- cmd->common.opcode == nvme_fabrics_command &&
- cmd->fabrics.fctype == nvme_fabrics_type_connect))
- /*
- * If queue is live, allow only commands that
- * are internally generated pass through. These
- * are commands on the admin queue to initialize
- * the controller. This will reject any ioctl
- * admin cmds received while initializing.
- *
- * If the queue is not live, allow only a
- * connect command. This will reject any ioctl
- * admin cmd as well as initialization commands
- * if the controller reverted the queue to non-live.
- */
+ break;
+
+ /*
+ * If queue is live, allow only commands that are internally
+ * generated pass through. These are commands on the admin
+ * queue to initialize the controller. This will reject any
+ * ioctl admin cmds received while initializing.
+ */
+ if (queue_live && !(nvme_req(rq)->flags & NVME_REQ_USERCMD))
return BLK_STS_OK;
/*
- * fall-thru to the reject_or_queue_io clause
+ * If the queue is not live, allow only a connect command. This
+ * will reject any ioctl admin cmd as well as initialization
+ * commands if the controller reverted the queue to non-live.
*/
+ if (!queue_live && blk_rq_is_passthrough(rq) &&
+ cmd->common.opcode == nvme_fabrics_command &&
+ cmd->fabrics.fctype == nvme_fabrics_type_connect)
+ return BLK_STS_OK;
break;
-
- /* these cases fall-thru
- * case NVME_CTRL_LIVE:
- * case NVME_CTRL_RESETTING:
- */
default:
break;
}
-reject_or_queue_io:
/*
- * Any other new io is something we're not in a state to send
- * to the device. Default action is to busy it and retry it
- * after the controller state is recovered. However, anything
- * marked for failfast or nvme multipath is immediately failed.
- * Note: commands used to initialize the controller will be
- * marked for failfast.
+ * Any other new io is something we're not in a state to send to the
+ * device. Default action is to busy it and retry it after the
+ * controller state is recovered. However, anything marked for failfast
+ * or nvme multipath is immediately failed. Note: commands used to
+ * initialize the controller will be marked for failfast.
* Note: nvme cli/ioctl commands are marked for failfast.
*/
if (!blk_noretry_request(rq) && !(rq->cmd_flags & REQ_NVME_MPATH))
return BLK_STS_RESOURCE;
-
-reject_io:
nvme_req(rq)->status = NVME_SC_ABORT_REQ;
return BLK_STS_IOERR;
}