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nvme-fabrics: fix and refine state checks in __nvmf_check_ready

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- make sure we only allow internally generates commands in any non-live
   state
 - only allow connect commands on non-live queues when actually in the
   new or connecting states
 - treat all other non-live, non-dead states the same as a default
   cach-all

This fixes a regression where we could not shutdown a controller
orderly as we didn't allow the internal generated Property Set
command, and also ensures we don't accidentally let a Connect command
through in the wrong state.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Smart <james.smart@broadcom.com>
This commit is contained in:
Christoph Hellwig 2018-06-11 17:41:11 +02:00
parent 278ab3799a
commit 35897b920c
1 changed files with 19 additions and 20 deletions
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39
drivers/nvme/host/fabrics.c
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@ -556,34 +556,33 @@ EXPORT_SYMBOL_GPL(nvmf_fail_nonready_command);
bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
bool queue_live)
{
struct nvme_command *cmd = nvme_req(rq)->cmd;
struct nvme_request *req = nvme_req(rq);
/*
* If we are in some state of setup or teardown only allow
* internally generated commands.
*/
if (!blk_rq_is_passthrough(rq) || (req->flags & NVME_REQ_USERCMD))
return false;
/*
* Only allow commands on a live queue, except for the connect command,
* which is require to set the queue live in the appropinquate states.
*/
switch (ctrl->state) {
case NVME_CTRL_NEW:
case NVME_CTRL_CONNECTING:
case NVME_CTRL_DELETING:
/*
* 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))
if (req->cmd->common.opcode == nvme_fabrics_command &&
req->cmd->fabrics.fctype == nvme_fabrics_type_connect)
return true;
/*
* 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 true;
return false;
break;
default:
break;
case NVME_CTRL_DEAD:
return false;
}
return queue_live;
}
EXPORT_SYMBOL_GPL(__nvmf_check_ready);