From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Benjamin Marzinski Date: Fri, 7 Oct 2022 12:35:43 -0500 Subject: [PATCH] libmultipath: get nvme path transport protocol Read the transport protocol from /sys/block/nvmeXnY/device/transport. Update protocol_name[] and bus_protocol_id() to store the nvme protocol names after the scsi protocol names. Signed-off-by: Benjamin Marzinski Reviewed-by: Martin Wilck --- libmultipath/discovery.c | 18 ++++++++++++++++-- libmultipath/structs.c | 22 +++++++++++++++++----- libmultipath/structs.h | 33 +++++++++++++++++++++------------ multipath/multipath.conf.5 | 10 +++++++--- 4 files changed, 61 insertions(+), 22 deletions(-) diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c index 7f2eb409..f593a7bf 100644 --- a/libmultipath/discovery.c +++ b/libmultipath/discovery.c @@ -1483,6 +1483,7 @@ nvme_sysfs_pathinfo (struct path *pp, const struct _vector *hwtable) struct udev_device *parent; const char *attr_path = NULL; const char *attr; + int i; if (pp->udev) attr_path = udev_device_get_sysname(pp->udev); @@ -1505,6 +1506,18 @@ nvme_sysfs_pathinfo (struct path *pp, const struct _vector *hwtable) attr = udev_device_get_sysattr_value(parent, "cntlid"); pp->sg_id.channel = attr ? atoi(attr) : 0; + attr = udev_device_get_sysattr_value(parent, "transport"); + if (attr) { + for (i = 0; i < NVME_PROTOCOL_UNSPEC; i++){ + if (protocol_name[SYSFS_BUS_NVME + i] && + !strcmp(attr, + protocol_name[SYSFS_BUS_NVME + i] + 5)) { + pp->sg_id.proto_id = i; + break; + } + } + } + snprintf(pp->vendor_id, SCSI_VENDOR_SIZE, "NVME"); snprintf(pp->product_id, PATH_PRODUCT_SIZE, "%s", udev_device_get_sysattr_value(parent, "model")); @@ -1759,9 +1772,10 @@ sysfs_pathinfo(struct path *pp, const struct _vector *hwtable) pp->bus = SYSFS_BUS_SCSI; pp->sg_id.proto_id = SCSI_PROTOCOL_UNSPEC; } - if (!strncmp(pp->dev,"nvme", 4)) + if (!strncmp(pp->dev,"nvme", 4)) { pp->bus = SYSFS_BUS_NVME; - + pp->sg_id.proto_id = NVME_PROTOCOL_UNSPEC; + } switch (pp->bus) { case SYSFS_BUS_SCSI: return scsi_sysfs_pathinfo(pp, hwtable); diff --git a/libmultipath/structs.c b/libmultipath/structs.c index be81a83c..a2e56890 100644 --- a/libmultipath/structs.c +++ b/libmultipath/structs.c @@ -25,7 +25,6 @@ const char * const protocol_name[LAST_BUS_PROTOCOL_ID + 1] = { [SYSFS_BUS_UNDEF] = "undef", [SYSFS_BUS_CCW] = "ccw", [SYSFS_BUS_CCISS] = "cciss", - [SYSFS_BUS_NVME] = "nvme", [SYSFS_BUS_SCSI + SCSI_PROTOCOL_FCP] = "scsi:fcp", [SYSFS_BUS_SCSI + SCSI_PROTOCOL_SPI] = "scsi:spi", [SYSFS_BUS_SCSI + SCSI_PROTOCOL_SSA] = "scsi:ssa", @@ -37,6 +36,13 @@ const char * const protocol_name[LAST_BUS_PROTOCOL_ID + 1] = { [SYSFS_BUS_SCSI + SCSI_PROTOCOL_ATA] = "scsi:ata", [SYSFS_BUS_SCSI + SCSI_PROTOCOL_USB] = "scsi:usb", [SYSFS_BUS_SCSI + SCSI_PROTOCOL_UNSPEC] = "scsi:unspec", + [SYSFS_BUS_NVME + NVME_PROTOCOL_PCIE] = "nvme:pcie", + [SYSFS_BUS_NVME + NVME_PROTOCOL_RDMA] = "nvme:rdma", + [SYSFS_BUS_NVME + NVME_PROTOCOL_FC] = "nvme:fc", + [SYSFS_BUS_NVME + NVME_PROTOCOL_TCP] = "nvme:tcp", + [SYSFS_BUS_NVME + NVME_PROTOCOL_LOOP] = "nvme:loop", + [SYSFS_BUS_NVME + NVME_PROTOCOL_APPLE_NVME] = "nvme:apple-nvme", + [SYSFS_BUS_NVME + NVME_PROTOCOL_UNSPEC] = "nvme:unspec", }; struct adapter_group * @@ -752,11 +758,17 @@ out: } unsigned int bus_protocol_id(const struct path *pp) { - if (!pp || pp->bus < 0 || pp->bus > SYSFS_BUS_SCSI) + if (!pp || pp->bus < 0 || pp->bus > SYSFS_BUS_NVME) return SYSFS_BUS_UNDEF; - if (pp->bus != SYSFS_BUS_SCSI) + if (pp->bus != SYSFS_BUS_SCSI && pp->bus != SYSFS_BUS_NVME) return pp->bus; - if ((int)pp->sg_id.proto_id < 0 || pp->sg_id.proto_id > SCSI_PROTOCOL_UNSPEC) + if (pp->sg_id.proto_id < 0) return SYSFS_BUS_UNDEF; - return SYSFS_BUS_SCSI + pp->sg_id.proto_id; + if (pp->bus == SYSFS_BUS_SCSI && + pp->sg_id.proto_id > SCSI_PROTOCOL_UNSPEC) + return SYSFS_BUS_UNDEF; + if (pp->bus == SYSFS_BUS_NVME && + pp->sg_id.proto_id > NVME_PROTOCOL_UNSPEC) + return SYSFS_BUS_UNDEF; + return pp->bus + pp->sg_id.proto_id; } diff --git a/libmultipath/structs.h b/libmultipath/structs.h index 2525af17..0867b91d 100644 --- a/libmultipath/structs.h +++ b/libmultipath/structs.h @@ -56,15 +56,6 @@ enum failback_mode { FAILBACK_FOLLOWOVER }; -/* SYSFS_BUS_SCSI should be last, see bus_protocol_id() */ -enum sysfs_buses { - SYSFS_BUS_UNDEF, - SYSFS_BUS_CCW, - SYSFS_BUS_CCISS, - SYSFS_BUS_NVME, - SYSFS_BUS_SCSI, -}; - enum pathstates { PSTATE_UNDEF, PSTATE_FAILED, @@ -190,14 +181,32 @@ enum scsi_protocol { SCSI_PROTOCOL_ATA = 8, SCSI_PROTOCOL_USB = 9, /* USB Attached SCSI (UAS), and others */ SCSI_PROTOCOL_UNSPEC = 0xa, /* No specific protocol */ + SCSI_PROTOCOL_END = 0xb, /* offset of the next sysfs_buses entry */ +}; + +/* values from /sys/class/nvme/nvmeX */ +enum nvme_protocol { + NVME_PROTOCOL_PCIE = 0, + NVME_PROTOCOL_RDMA = 1, + NVME_PROTOCOL_FC = 2, + NVME_PROTOCOL_TCP = 3, + NVME_PROTOCOL_LOOP = 4, + NVME_PROTOCOL_APPLE_NVME = 5, + NVME_PROTOCOL_UNSPEC = 6, /* unknown protocol */ +}; + +enum sysfs_buses { + SYSFS_BUS_UNDEF, + SYSFS_BUS_CCW, + SYSFS_BUS_CCISS, + SYSFS_BUS_SCSI, + SYSFS_BUS_NVME = SYSFS_BUS_SCSI + SCSI_PROTOCOL_END, }; /* * Linear ordering of bus/protocol - * This assumes that SYSFS_BUS_SCSI is last in enum sysfs_buses - * SCSI is the only bus type for which we distinguish protocols. */ -#define LAST_BUS_PROTOCOL_ID (SYSFS_BUS_SCSI + SCSI_PROTOCOL_UNSPEC) +#define LAST_BUS_PROTOCOL_ID (SYSFS_BUS_NVME + NVME_PROTOCOL_UNSPEC) unsigned int bus_protocol_id(const struct path *pp); extern const char * const protocol_name[]; diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5 index e1a787d4..7af53588 100644 --- a/multipath/multipath.conf.5 +++ b/multipath/multipath.conf.5 @@ -1395,7 +1395,9 @@ Regular expression for the protocol of a device to be excluded/included. The protocol strings that multipath recognizes are \fIscsi:fcp\fR, \fIscsi:spi\fR, \fIscsi:ssa\fR, \fIscsi:sbp\fR, \fIscsi:srp\fR, \fIscsi:iscsi\fR, \fIscsi:sas\fR, \fIscsi:adt\fR, \fIscsi:ata\fR, -\fIscsi:unspec\fR, \fIccw\fR, \fIcciss\fR, \fInvme\fR, and \fIundef\fR. +\fIscsi:unspec\fR, \fInvme:pcie\fR, \fInvme:rdma\fR, \fInvme:fc\fR, +\fInvme:tcp\fR, \fInvme:loop\fR, \fInvme:apple-nvme\fR, \fInvme:unspec\fR, +\fIccw\fR, \fIcciss\fR, and \fIundef\fR. The protocol that a path is using can be viewed by running \fBmultipathd show paths format "%d %P"\fR .RE @@ -1783,8 +1785,10 @@ The protocol subsection recognizes the following mandatory attribute: The protocol string of the path device. The possible values are \fIscsi:fcp\fR, \fIscsi:spi\fR, \fIscsi:ssa\fR, \fIscsi:sbp\fR, \fIscsi:srp\fR, \fIscsi:iscsi\fR, \fIscsi:sas\fR, \fIscsi:adt\fR, \fIscsi:ata\fR, -\fIscsi:unspec\fR, \fIccw\fR, \fIcciss\fR, \fInvme\fR, and \fIundef\fR. This is -\fBnot\fR a regular expression. the path device protcol string must match +\fIscsi:unspec\fR, \fInvme:pcie\fR, \fInvme:rdma\fR, \fInvme:fc\fR, +\fInvme:tcp\fR, \fInvme:loop\fR, \fInvme:apple-nvme\fR, \fInvme:unspec\fR, +\fIccw\fR, \fIcciss\fR, and \fIundef\fR. This is +\fBnot\fR a regular expression. the path device protocol string must match exactly. The protocol that a path is using can be viewed by running \fBmultipathd show paths format "%d %P"\fR .LP