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From 192545bc67fed763ac54761ca067b9c2f93ecdd1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ji=C5=99=C3=AD=20P=C3=ADrko?= <jiri@resnulli.us>
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Date: Wed, 2 Nov 2016 03:46:01 +0100
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Subject: [PATCH] udev: net_id: add support for phys_port_name attribute
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(#4506)
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Switch drivers uses phys_port_name attribute to pass front panel port
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name to user. Use it to generate netdev names.
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Signed-off-by: Jiri Pirko <jiri@mellanox.com>
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Cherry-picked from: 4887b656c22af059d4e833de7b56544f24951184
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Resolves: #1392426
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---
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src/udev/udev-builtin-net_id.c | 24 ++++++++++++++++++------
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1 file changed, 18 insertions(+), 6 deletions(-)
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diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
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index 19e1f2631..7c154355d 100644
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--- a/src/udev/udev-builtin-net_id.c
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+++ b/src/udev/udev-builtin-net_id.c
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@@ -38,7 +38,7 @@
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* o<index>[d<dev_port>] -- on-board device index number
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* s<slot>[f<function>][d<dev_port>] -- hotplug slot index number
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* x<MAC> -- MAC address
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- * [P<domain>]p<bus>s<slot>[f<function>][d<dev_id>/<dev_port>]
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+ * [P<domain>]p<bus>s<slot>[f<function>][n<phys_port_name>|d<dev_id>/<dev_port>]
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* -- PCI geographical location
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* [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>]
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* -- USB port number chain
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@@ -134,7 +134,7 @@ static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) {
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unsigned dev_port = 0;
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size_t l;
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char *s;
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- const char *attr;
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+ const char *attr, *port_name;
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int idx;
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/* ACPI _DSM -- device specific method for naming a PCI or PCI Express device */
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@@ -161,10 +161,15 @@ static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) {
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if (attr)
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dev_port = strtol(attr, NULL, 10);
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+ /* kernel provided front panel port name for multiple port PCI device */
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+ port_name = udev_device_get_sysattr_value(dev, "phys_port_name");
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+
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s = names->pci_onboard;
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l = sizeof(names->pci_onboard);
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l = strpcpyf(&s, l, "o%d", idx);
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- if (dev_port > 0)
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+ if (port_name)
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+ l = strpcpyf(&s, l, "n%s", port_name);
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+ else if (dev_port > 0)
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l = strpcpyf(&s, l, "d%d", dev_port);
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if (l == 0)
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names->pci_onboard[0] = '\0';
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@@ -199,7 +204,7 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
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unsigned domain, bus, slot, func, dev_id = 0;
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size_t l;
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char *s;
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- const char *attr;
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+ const char *attr, *port_name;
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struct udev_device *pci = NULL;
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char slots[256], str[256];
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_cleanup_closedir_ DIR *dir = NULL;
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@@ -220,6 +225,9 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
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}
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}
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+ /* kernel provided front panel port name for multiple port PCI device */
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+ port_name = udev_device_get_sysattr_value(dev, "phys_port_name");
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+
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/* compose a name based on the raw kernel's PCI bus, slot numbers */
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s = names->pci_path;
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l = sizeof(names->pci_path);
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@@ -228,7 +236,9 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
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l = strpcpyf(&s, l, "p%us%u", bus, slot);
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if (func > 0 || is_pci_multifunction(names->pcidev))
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l = strpcpyf(&s, l, "f%d", func);
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- if (dev_id > 0)
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+ if (port_name)
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+ l = strpcpyf(&s, l, "n%s", port_name);
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+ else if (dev_id > 0)
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l = strpcpyf(&s, l, "d%d", dev_id);
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if (l == 0)
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names->pci_path[0] = '\0';
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@@ -278,7 +288,9 @@ static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
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l = strpcpyf(&s, l, "s%d", hotplug_slot);
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if (func > 0 || is_pci_multifunction(names->pcidev))
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l = strpcpyf(&s, l, "f%d", func);
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- if (dev_id > 0)
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+ if (port_name)
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+ l = strpcpyf(&s, l, "n%s", port_name);
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+ else if (dev_id > 0)
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l = strpcpyf(&s, l, "d%d", dev_id);
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if (l == 0)
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names->pci_slot[0] = '\0';
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