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nvmf: implement controller reset for fabrics.

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According to the spec, if the CC.EN bit is transitioned from 1 to 0,
then all of the I/O qpairs shall be disconnected and the csts.rdy bit
shall be set to zero.

Change-Id: I871170e79e08a9fab8286f9c135c7b3316f58ace
Signed-off-by: Seth Howell <seth.howell@intel.com>
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/423
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Seth Howell <seth.howell5141@gmail.com>
Reviewed-by: Jacek Kalwas <jacek.kalwas@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Seth Howell 2020-01-31 16:10:28 -07:00 committed by Tomasz Zawadzki
parent 68c2244cdc
commit ae86baeba2
1 changed files with 38 additions and 8 deletions
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46
lib/nvmf/ctrlr.c
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@ -110,8 +110,8 @@ spdk_nvmf_ctrlr_disconnect_qpairs_done(struct spdk_io_channel_iter *i, int statu
}
}
static void
spdk_nvmf_ctrlr_disconnect_qpairs_on_pg(struct spdk_io_channel_iter *i)
static int
_spdk_nvmf_ctrlr_disconnect_qpairs_on_pg(struct spdk_io_channel_iter *i, bool include_admin)
{
int rc = 0;
struct spdk_nvmf_ctrlr *ctrlr;
@ -124,17 +124,28 @@ spdk_nvmf_ctrlr_disconnect_qpairs_on_pg(struct spdk_io_channel_iter *i)
group = spdk_io_channel_get_ctx(ch);
TAILQ_FOREACH_SAFE(qpair, &group->qpairs, link, temp_qpair) {
if (qpair->ctrlr == ctrlr) {
if (qpair->ctrlr == ctrlr && (include_admin || !spdk_nvmf_qpair_is_admin_queue(qpair))) {
rc = spdk_nvmf_qpair_disconnect(qpair, NULL, NULL);
if (rc) {
SPDK_ERRLOG("Qpair disconnect failed\n");
goto next_channel;
return rc;
}
}
}
next_channel:
spdk_for_each_channel_continue(i, rc);
return rc;
}
static void
spdk_nvmf_ctrlr_disconnect_qpairs_on_pg(struct spdk_io_channel_iter *i)
{
spdk_for_each_channel_continue(i, _spdk_nvmf_ctrlr_disconnect_qpairs_on_pg(i, true));
}
static void
spdk_nvmf_ctrlr_disconnect_io_qpairs_on_pg(struct spdk_io_channel_iter *i)
{
spdk_for_each_channel_continue(i, _spdk_nvmf_ctrlr_disconnect_qpairs_on_pg(i, false));
}
static int
@ -644,6 +655,22 @@ spdk_nvmf_ctrlr_cmd_connect(struct spdk_nvmf_request *req)
return _spdk_nvmf_ctrlr_connect(req);
}
static void
spdk_nvmf_ctrlr_cc_reset_done(struct spdk_io_channel_iter *i, int status)
{
struct spdk_nvmf_ctrlr *ctrlr = spdk_io_channel_iter_get_ctx(i);
if (status < 0) {
SPDK_ERRLOG("Fail to disconnect io ctrlr qpairs\n");
assert(false);
}
/* Only a subset of the registers are cleared out on a reset */
ctrlr->vcprop.cc.raw = 0;
ctrlr->vcprop.csts.raw = 0;
}
const struct spdk_nvmf_registers *
spdk_nvmf_ctrlr_get_regs(struct spdk_nvmf_ctrlr *ctrlr)
{
@ -690,8 +717,11 @@ nvmf_prop_set_cc(struct spdk_nvmf_ctrlr *ctrlr, uint32_t value)
ctrlr->vcprop.cc.bits.en = 1;
ctrlr->vcprop.csts.bits.rdy = 1;
} else {
SPDK_ERRLOG("CC.EN transition from 1 to 0 (reset) not implemented!\n");
return false;
ctrlr->vcprop.cc.bits.en = 0;
spdk_for_each_channel(ctrlr->subsys->tgt,
spdk_nvmf_ctrlr_disconnect_io_qpairs_on_pg,
ctrlr,
spdk_nvmf_ctrlr_cc_reset_done);
}
diff.bits.en = 0;
}