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nvmf/vfio-user: add controller state definition

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We will use the controller state to implement the coming
device quiesce feature, it's safe to do anyting when
a subsystem is in PAUSED state.

Change-Id: I3b466ed01848e668a1ffcea1d4f1466e971afa23
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10619
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Changpeng Liu 2021-12-07 23:36:40 +08:00 committed by Jim Harris
parent 1fda573b41
commit be0aae0658
1 changed files with 24 additions and 0 deletions
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24
lib/nvmf/vfio_user.c
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@ -151,6 +151,28 @@ enum nvmf_vfio_user_cq_state {
VFIO_USER_CQ_DELETED,
};
enum nvmf_vfio_user_ctrlr_state {
VFIO_USER_CTRLR_CREATING = 0,
VFIO_USER_CTRLR_RUNNING,
/* Quiesce requested by libvfio-user */
VFIO_USER_CTRLR_PAUSING,
/* NVMf subsystem is paused, it's safe to do PCI reset, memory register,
* memory unergister, and vfio migration state transition in this state.
*/
VFIO_USER_CTRLR_PAUSED,
/*
* Implies that the NVMf subsystem is paused. Device will be unquiesced (PCI
* reset, memory register and unregister, controller in destination VM has
* been restored). NVMf subsystem resume has been requested.
*/
VFIO_USER_CTRLR_RESUMING,
/*
* Implies that the NVMf subsystem is paused. Both controller in source VM and
* destinatiom VM is in this state when doing live migration.
*/
VFIO_USER_CTRLR_MIGRATING
};
struct nvmf_vfio_user_qpair {
struct spdk_nvmf_qpair qpair;
struct spdk_nvmf_transport_poll_group *group;
@ -187,6 +209,7 @@ struct nvmf_vfio_user_ctrlr {
/* Connected queue pairs list */
TAILQ_HEAD(, nvmf_vfio_user_qpair) connected_qps;
enum nvmf_vfio_user_ctrlr_state state;
struct spdk_thread *thread;
struct spdk_poller *vfu_ctx_poller;
@ -2555,6 +2578,7 @@ handle_queue_connect_rsp(struct nvmf_vfio_user_req *req, void *cb_arg)
vu_ctrlr->cntlid = vu_qpair->qpair.ctrlr->cntlid;
vu_ctrlr->thread = spdk_get_thread();
vu_ctrlr->ctrlr = vu_qpair->qpair.ctrlr;
vu_ctrlr->state = VFIO_USER_CTRLR_RUNNING;
vu_ctrlr->vfu_ctx_poller = SPDK_POLLER_REGISTER(vfio_user_poll_vfu_ctx, vu_ctrlr, 0);
} else {
/* For I/O queues this command was generated in response to an