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bdev/nvme: add failover option to bdev_nvme_reset

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When we fail to process admin completions on a controller
attempt to failover to a previously registered trid

Signed-off-by: Seth Howell <seth.howell@intel.com>
Change-Id: Icdb43a726969fede4665f2fe59723dd90c5dad0d
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2883
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Seth Howell 2020-06-12 16:35:47 -07:00 committed by Tomasz Zawadzki
parent 5f13e0f67f
commit 62ded32fd7
1 changed files with 29 additions and 7 deletions
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36
module/bdev/nvme/bdev_nvme.c
View File

@ -162,7 +162,8 @@ static int bdev_nvme_io_passthru(struct nvme_bdev *nbdev, struct spdk_io_channel
static int bdev_nvme_io_passthru_md(struct nvme_bdev *nbdev, struct spdk_io_channel *ch,
struct nvme_bdev_io *bio,
struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes, void *md_buf, size_t md_len);
static int bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bio);
static int bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bio,
bool failover);
typedef void (*populate_namespace_fn)(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr,
struct nvme_bdev_ns *nvme_ns, struct nvme_async_probe_ctx *ctx);
@ -272,7 +273,7 @@ bdev_nvme_poll_adminq(void *arg)
if (rc < 0) {
nvme_bdev_ctrlr = nvme_bdev_ctrlr_get(spdk_nvme_ctrlr_get_transport_id(ctrlr));
assert(nvme_bdev_ctrlr != NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL, true);
}
return rc;
@ -447,10 +448,12 @@ _bdev_nvme_reset_destroy_qpair(struct spdk_io_channel_iter *i)
}
static int
bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bio)
bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bio, bool failover)
{
struct spdk_io_channel *ch;
struct nvme_io_channel *nvme_ch;
struct nvme_bdev_ctrlr_trid *multipath_trid, *tmp_trid;
int rc;
pthread_mutex_lock(&g_bdev_nvme_mutex);
if (nvme_bdev_ctrlr->destruct) {
@ -482,6 +485,25 @@ bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bi
return 0;
}
if (failover) {
tmp_trid = TAILQ_FIRST(&nvme_bdev_ctrlr->multipath_trids);
assert(tmp_trid);
assert(&tmp_trid->trid == nvme_bdev_ctrlr->trid);
multipath_trid = TAILQ_NEXT(tmp_trid, link);
if (multipath_trid) {
spdk_nvme_ctrlr_fail(nvme_bdev_ctrlr->ctrlr);
nvme_bdev_ctrlr->trid = &multipath_trid->trid;
/** Shuffle the old trid to the end of the list and use the new one.
* Allows for round robin through multiple connections.
*/
rc = spdk_nvme_ctrlr_set_trid(nvme_bdev_ctrlr->ctrlr, &multipath_trid->trid);
assert(rc == 0);
TAILQ_REMOVE(&nvme_bdev_ctrlr->multipath_trids, tmp_trid, link);
TAILQ_INSERT_TAIL(&nvme_bdev_ctrlr->multipath_trids, tmp_trid, link);
}
}
pthread_mutex_unlock(&g_bdev_nvme_mutex);
/* First, delete all NVMe I/O queue pairs. */
spdk_for_each_channel(nvme_bdev_ctrlr,
@ -592,7 +614,7 @@ _bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_
bdev_io->u.bdev.num_blocks);
case SPDK_BDEV_IO_TYPE_RESET:
return bdev_nvme_reset(nbdev->nvme_bdev_ctrlr, nbdev_io);
return bdev_nvme_reset(nbdev->nvme_bdev_ctrlr, nbdev_io, false);
case SPDK_BDEV_IO_TYPE_FLUSH:
return bdev_nvme_flush(nbdev,
@ -1129,7 +1151,7 @@ nvme_abort_cpl(void *ctx, const struct spdk_nvme_cpl *cpl)
SPDK_WARNLOG("Abort failed. Resetting controller.\n");
nvme_bdev_ctrlr = nvme_bdev_ctrlr_get(spdk_nvme_ctrlr_get_transport_id(ctrlr));
assert(nvme_bdev_ctrlr != NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL, false);
}
}
@ -1148,7 +1170,7 @@ timeout_cb(void *cb_arg, struct spdk_nvme_ctrlr *ctrlr,
SPDK_ERRLOG("Controller Fatal Status, reset required\n");
nvme_bdev_ctrlr = nvme_bdev_ctrlr_get(spdk_nvme_ctrlr_get_transport_id(ctrlr));
assert(nvme_bdev_ctrlr != NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL, false);
return;
}
@ -1168,7 +1190,7 @@ timeout_cb(void *cb_arg, struct spdk_nvme_ctrlr *ctrlr,
case SPDK_BDEV_NVME_TIMEOUT_ACTION_RESET:
nvme_bdev_ctrlr = nvme_bdev_ctrlr_get(spdk_nvme_ctrlr_get_transport_id(ctrlr));
assert(nvme_bdev_ctrlr != NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL);
bdev_nvme_reset(nvme_bdev_ctrlr, NULL, false);
break;
case SPDK_BDEV_NVME_TIMEOUT_ACTION_NONE:
SPDK_DEBUGLOG(SPDK_LOG_BDEV_NVME, "No action for nvme controller timeout.\n");