On 02/21/2017 11:12 PM, Keith Busch wrote:
multipath-tools project does not use Patchwork.
CC: Christophe Varoqui
> Signed-off-by: Keith Busch <keith.bu...@intel.com>
> ---
> v1->v2:
> Removed explicitly setting the wwid path information. We get that with
> through exported udev attributes.
>
> Added default retain_hwhandler to off for NVME devices. This has the
> kernel not call into scsi specific APIs that don't exist for NVMe.
>
> libmultipath/discovery.c | 35 +++++++++++++++++++++++++++++++++++
> libmultipath/hwtable.c | 10 ++++++++++
> libmultipath/structs.h | 1 +
> 3 files changed, 46 insertions(+)
>
> diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
> index d1aec31..39dd92a 100644
> --- a/libmultipath/discovery.c
> +++ b/libmultipath/discovery.c
> @@ -1187,6 +1187,36 @@ scsi_sysfs_pathinfo (struct path * pp, vector hwtable)
> }
>
> static int
> +nvme_sysfs_pathinfo (struct path * pp, vector hwtable)
> +{
> + struct udev_device *parent, *nvme = NULL;
> +
> + parent = pp->udev;
> + while (parent) {
> + const char *subsys = udev_device_get_subsystem(parent);
> +
> + if (subsys && !strncmp(subsys, "nvme", 4)) {
> + nvme = parent;
> + break;
> + }
> + parent = udev_device_get_parent(parent);
> + }
> + if (!nvme)
> + return 1;
> +
> + snprintf(pp->vendor_id, SCSI_VENDOR_SIZE, "NVME");
> + snprintf(pp->product_id, SCSI_PRODUCT_SIZE, "%s",
> udev_device_get_sysattr_value(nvme, "model"));
> + snprintf(pp->serial, SERIAL_SIZE, "%s",
> udev_device_get_sysattr_value(nvme, "serial"));
> + snprintf(pp->rev, SCSI_REV_SIZE, "%s",
> udev_device_get_sysattr_value(nvme, "firmware_rev"));
> +
> + condlog(3, "%s: vendor:%s product:%s serial:%s rev:%s", pp->dev,
> + pp->vendor_id, pp->product_id, pp->serial, pp->rev);
> + pp->hwe = find_hwe(hwtable, pp->vendor_id, pp->product_id, NULL);
> +
> + return 0;
> +}
> +
> +static int
> rbd_sysfs_pathinfo (struct path * pp, vector hwtable)
> {
> sprintf(pp->vendor_id, "Ceph");
> @@ -1405,6 +1435,8 @@ sysfs_pathinfo(struct path * pp, vector hwtable)
> pp->bus = SYSFS_BUS_SCSI;
> if (!strncmp(pp->dev,"rbd", 3))
> pp->bus = SYSFS_BUS_RBD;
> + if (!strncmp(pp->dev,"nvme", 4))
> + pp->bus = SYSFS_BUS_NVME;
>
> if (pp->bus == SYSFS_BUS_UNDEF)
> return 0;
> @@ -1420,6 +1452,9 @@ sysfs_pathinfo(struct path * pp, vector hwtable)
> } else if (pp->bus == SYSFS_BUS_RBD) {
> if (rbd_sysfs_pathinfo(pp, hwtable))
> return 1;
> + } else if (pp->bus == SYSFS_BUS_NVME) {
> + if (nvme_sysfs_pathinfo(pp, hwtable))
> + return 1;
> }
> return 0;
> }
> diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
> index f5a5f7b..8409261 100644
> --- a/libmultipath/hwtable.c
> +++ b/libmultipath/hwtable.c
> @@ -1073,6 +1073,16 @@ static struct hwentry default_hw[] = {
> .prio_name = PRIO_ALUA,
> .no_path_retry = 30,
> },
> + /*
> + * Generic NVMe devices
> + */
> + {
> + .vendor = "NVME",
> + .product = ".*",
> + .uid_attribute = "ID_WWN",
> + .checker_name = DIRECTIO,
> + .retain_hwhandler = RETAIN_HWHANDLER_OFF,
> + },
> #if 0
> /*
> * Copy this TEMPLATE to add new hardware.
> diff --git a/libmultipath/structs.h b/libmultipath/structs.h
> index 6edd927..dfd65ae 100644
> --- a/libmultipath/structs.h
> +++ b/libmultipath/structs.h
> @@ -53,6 +53,7 @@ enum sysfs_buses {
> SYSFS_BUS_CCW,
> SYSFS_BUS_CCISS,
> SYSFS_BUS_RBD,
> + SYSFS_BUS_NVME,
> };
>
> enum pathstates {
>
--
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