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nvme: add new reconnecting controller state

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The nvme fabric (RDMA, FC, etc...) can introduce port, link or node
failures that may require a reconnect to re-establish the connection.

Add a new reconnecting state that will initially be used by the RDMA
driver.

Reviewed-by: Jay Freyensee <james.p.freyensee@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2016-07-06 21:55:49 +09:00 committed by Jens Axboe
parent 486cf9899e
commit def61eca96
2 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/nvme/host/core.c
View File

@ -88,6 +88,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
switch (old_state) {
case NVME_CTRL_NEW:
case NVME_CTRL_RESETTING:
case NVME_CTRL_RECONNECTING:
changed = true;
/* FALLTHRU */
default:
@ -97,6 +98,16 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
case NVME_CTRL_RESETTING:
switch (old_state) {
case NVME_CTRL_NEW:
case NVME_CTRL_LIVE:
case NVME_CTRL_RECONNECTING:
changed = true;
/* FALLTHRU */
default:
break;
}
break;
case NVME_CTRL_RECONNECTING:
switch (old_state) {
case NVME_CTRL_LIVE:
changed = true;
/* FALLTHRU */
@ -108,6 +119,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
switch (old_state) {
case NVME_CTRL_LIVE:
case NVME_CTRL_RESETTING:
case NVME_CTRL_RECONNECTING:
changed = true;
/* FALLTHRU */
default:

1
drivers/nvme/host/nvme.h
View File

@ -74,6 +74,7 @@ enum nvme_ctrl_state {
NVME_CTRL_NEW,
NVME_CTRL_LIVE,
NVME_CTRL_RESETTING,
NVME_CTRL_RECONNECTING,
NVME_CTRL_DELETING,
NVME_CTRL_DEAD,
};