This file is part of systemd.
Copyright 2012 Kay Sievers <kay@vrfy.org>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
/*
#include "dirent-util.h"
#include "fd-util.h"
#include "fileio.h"
+#include "fs-util.h"
+#include "parse-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "udev.h"
+#include "udev-util.h"
#define ONBOARD_INDEX_MAX (16*1024-1)
char platform_path[IFNAMSIZ];
};
+struct virtfn_info {
+ struct udev_device *physfn_pcidev;
+ char suffix[IFNAMSIZ];
+};
+
/* skip intermediate virtio devices */
static struct udev_device *skip_virtio(struct udev_device *dev) {
struct udev_device *parent = dev;
return parent;
}
+static int get_virtfn_info(struct udev_device *dev, struct netnames *names, struct virtfn_info *vf_info) {
+ struct udev *udev;
+ const char *physfn_link_file;
+ _cleanup_free_ char *physfn_pci_syspath = NULL;
+ _cleanup_free_ char *virtfn_pci_syspath = NULL;
+ struct dirent *dent;
+ _cleanup_closedir_ DIR *dir = NULL;
+ struct virtfn_info vf_info_local = {};
+ int r;
+
+ udev = udev_device_get_udev(names->pcidev);
+ if (!udev)
+ return -ENOENT;
+ /* Check if this is a virtual function. */
+ physfn_link_file = strjoina(udev_device_get_syspath(names->pcidev), "/physfn");
+ r = chase_symlinks(physfn_link_file, NULL, 0, &physfn_pci_syspath);
+ if (r < 0)
+ return r;
+
+ /* Get physical function's pci device. */
+ vf_info_local.physfn_pcidev = udev_device_new_from_syspath(udev, physfn_pci_syspath);
+ if (!vf_info_local.physfn_pcidev)
+ return -ENOENT;
+
+ /* Find the virtual function number by finding the right virtfn link. */
+ dir = opendir(physfn_pci_syspath);
+ if (!dir) {
+ r = -errno;
+ goto out_unref;
+ }
+ FOREACH_DIRENT_ALL(dent, dir, break) {
+ _cleanup_free_ char *virtfn_link_file = NULL;
+ if (!startswith(dent->d_name, "virtfn"))
+ continue;
+ virtfn_link_file = strjoin(physfn_pci_syspath, "/", dent->d_name);
+ if (!virtfn_link_file) {
+ r = -ENOMEM;
+ goto out_unref;
+ }
+ if (chase_symlinks(virtfn_link_file, NULL, 0, &virtfn_pci_syspath) < 0)
+ continue;
+ if (streq(udev_device_get_syspath(names->pcidev), virtfn_pci_syspath)) {
+ if (!snprintf_ok(vf_info_local.suffix, sizeof(vf_info_local.suffix), "v%s", &dent->d_name[6])) {
+ r = -ENOENT;
+ goto out_unref;
+ }
+ break;
+ }
+ }
+ if (isempty(vf_info_local.suffix)) {
+ r = -ENOENT;
+ goto out_unref;
+ }
+ *vf_info = vf_info_local;
+ return 0;
+
+out_unref:
+ udev_device_unref(vf_info_local.physfn_pcidev);
+ return r;
+}
+
/* retrieve on-board index number and label from firmware */
static int dev_pci_onboard(struct udev_device *dev, struct netnames *names) {
unsigned dev_port = 0;
return false;
}
+static bool is_pci_ari_enabled(struct udev_device *dev) {
+ return !!udev_device_get_sysattr_value(dev, "ari_enabled");
+}
+
static int dev_pci_slot(struct udev_device *dev, struct netnames *names) {
struct udev *udev = udev_device_get_udev(names->pcidev);
- unsigned domain, bus, slot, func, dev_port = 0;
+ unsigned domain, bus, slot, func, dev_port = 0, hotplug_slot = 0;
size_t l;
char *s;
const char *attr, *port_name;
- struct udev_device *pci = NULL;
+ _cleanup_udev_device_unref_ struct udev_device *pci = NULL;
+ struct udev_device *hotplug_slot_dev;
char slots[PATH_MAX];
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
- int hotplug_slot = 0, err = 0;
if (sscanf(udev_device_get_sysname(names->pcidev), "%x:%x:%x.%u", &domain, &bus, &slot, &func) != 4)
return -ENOENT;
+ if (is_pci_ari_enabled(names->pcidev))
+ /* ARI devices support up to 256 functions on a single device ("slot"), and interpret the
+ * traditional 5-bit slot and 3-bit function number as a single 8-bit function number,
+ * where the slot makes up the upper 5 bits. */
+ func += slot * 8;
/* kernel provided port index for multiple ports on a single PCI function */
attr = udev_device_get_sysattr_value(dev, "dev_port");
/* ACPI _SUN — slot user number */
pci = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci");
- if (!pci) {
- err = -ENOENT;
- goto out;
- }
-
- xsprintf(slots, "%s/slots", udev_device_get_syspath(pci));
- dir = opendir(slots);
- if (!dir) {
- err = -errno;
- goto out;
- }
-
- FOREACH_DIRENT_ALL(dent, dir, break) {
- int i;
- char *rest, *address, str[PATH_MAX];
+ if (!pci)
+ return -ENOENT;
- if (dent->d_name[0] == '.')
- continue;
- i = strtol(dent->d_name, &rest, 10);
- if (rest[0] != '\0')
- continue;
- if (i < 1)
- continue;
+ if (!snprintf_ok(slots, sizeof slots, "%s/slots", udev_device_get_syspath(pci)))
+ return -ENAMETOOLONG;
- xsprintf(str, "%s/%s/address", slots, dent->d_name);
- if (read_one_line_file(str, &address) >= 0) {
- /* match slot address with device by stripping the function */
- if (strneq(address, udev_device_get_sysname(names->pcidev), strlen(address)))
- hotplug_slot = i;
- free(address);
+ dir = opendir(slots);
+ if (!dir)
+ return -errno;
+
+ hotplug_slot_dev = names->pcidev;
+ while (hotplug_slot_dev) {
+ FOREACH_DIRENT_ALL(dent, dir, break) {
+ unsigned i;
+ int r;
+ char str[PATH_MAX];
+ _cleanup_free_ char *address = NULL;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ r = safe_atou_full(dent->d_name, 10, &i);
+ if (i < 1 || r < 0)
+ continue;
+
+ if (snprintf_ok(str, sizeof str, "%s/%s/address", slots, dent->d_name) &&
+ read_one_line_file(str, &address) >= 0)
+ /* match slot address with device by stripping the function */
+ if (startswith(udev_device_get_sysname(hotplug_slot_dev), address))
+ hotplug_slot = i;
+
+ if (hotplug_slot > 0)
+ break;
}
-
if (hotplug_slot > 0)
break;
+ rewinddir(dir);
+ hotplug_slot_dev = udev_device_get_parent_with_subsystem_devtype(hotplug_slot_dev, "pci", NULL);
}
if (hotplug_slot > 0) {
if (l == 0)
names->pci_slot[0] = '\0';
}
-out:
- udev_device_unref(pci);
- return err;
+
+ return 0;
}
static int names_vio(struct udev_device *dev, struct netnames *names) {
static int names_pci(struct udev_device *dev, struct netnames *names) {
struct udev_device *parent;
+ struct netnames vf_names = {};
+ struct virtfn_info vf_info = {};
assert(dev);
assert(names);
if (!names->pcidev)
return -ENOENT;
}
- dev_pci_onboard(dev, names);
- dev_pci_slot(dev, names);
+
+ if (get_virtfn_info(dev, names, &vf_info) >= 0) {
+ /* If this is an SR-IOV virtual device, get base name using physical device and add virtfn suffix. */
+ vf_names.pcidev = vf_info.physfn_pcidev;
+ dev_pci_onboard(dev, &vf_names);
+ dev_pci_slot(dev, &vf_names);
+ if (vf_names.pci_onboard[0])
+ if (strlen(vf_names.pci_onboard) + strlen(vf_info.suffix) < sizeof(names->pci_onboard))
+ strscpyl(names->pci_onboard, sizeof(names->pci_onboard),
+ vf_names.pci_onboard, vf_info.suffix, NULL);
+ if (vf_names.pci_slot[0])
+ if (strlen(vf_names.pci_slot) + strlen(vf_info.suffix) < sizeof(names->pci_slot))
+ strscpyl(names->pci_slot, sizeof(names->pci_slot),
+ vf_names.pci_slot, vf_info.suffix, NULL);
+ if (vf_names.pci_path[0])
+ if (strlen(vf_names.pci_path) + strlen(vf_info.suffix) < sizeof(names->pci_path))
+ strscpyl(names->pci_path, sizeof(names->pci_path),
+ vf_names.pci_path, vf_info.suffix, NULL);
+ udev_device_unref(vf_info.physfn_pcidev);
+ } else {
+ dev_pci_onboard(dev, names);
+ dev_pci_slot(dev, names);
+ }
return 0;
}
const char *bus_id, *subsys;
size_t bus_id_len;
size_t bus_id_start;
- int rc;
assert(dev);
assert(names);
bus_id += bus_id_start < bus_id_len ? bus_id_start : bus_id_len - 1;
/* Store the CCW bus-ID for use as network device name */
- rc = snprintf(names->ccw_busid, sizeof(names->ccw_busid), "c%s", bus_id);
- if (rc >= 0 && rc < (int)sizeof(names->ccw_busid))
+ if (snprintf_ok(names->ccw_busid, sizeof(names->ccw_busid), "c%s", bus_id))
names->type = NET_CCW;
+
return 0;
}
if (err >= 0 && names.type == NET_CCW) {
char str[IFNAMSIZ];
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.ccw_busid) < (int)sizeof(str))
+ if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.ccw_busid))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
goto out;
}
if (err >= 0 && names.type == NET_VIO) {
char str[IFNAMSIZ];
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.vio_slot) < (int)sizeof(str))
+ if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.vio_slot))
udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
goto out;
}
if (err >= 0 && names.type == NET_PLATFORM) {
char str[IFNAMSIZ];
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.platform_path) < (int)sizeof(str))
+ if (snprintf_ok(str, sizeof str, "%s%s", prefix, names.platform_path))
udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
goto out;
}
if (names.type == NET_PCI) {
char str[IFNAMSIZ];
- if (names.pci_onboard[0])
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str);
+ if (names.pci_onboard[0] &&
+ snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_onboard))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_ONBOARD", str);
- if (names.pci_onboard_label)
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_onboard_label) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str);
+ if (names.pci_onboard_label &&
+ snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_onboard_label))
+ udev_builtin_add_property(dev, test, "ID_NET_LABEL_ONBOARD", str);
- if (names.pci_path[0])
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_path) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+ if (names.pci_path[0] &&
+ snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_path))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
- if (names.pci_slot[0])
- if (snprintf(str, sizeof(str), "%s%s", prefix, names.pci_slot) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+ if (names.pci_slot[0] &&
+ snprintf_ok(str, sizeof str, "%s%s", prefix, names.pci_slot))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
goto out;
}
if (err >= 0 && names.type == NET_USB) {
char str[IFNAMSIZ];
- if (names.pci_path[0])
- if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.usb_ports) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+ if (names.pci_path[0] &&
+ snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.usb_ports))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
- if (names.pci_slot[0])
- if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.usb_ports) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+ if (names.pci_slot[0] &&
+ snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_slot, names.usb_ports))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
goto out;
}
if (err >= 0 && names.type == NET_BCMA) {
char str[IFNAMSIZ];
- if (names.pci_path[0])
- if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_path, names.bcma_core) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
+ if (names.pci_path[0] &&
+ snprintf_ok(str, sizeof str, "%s%s%s", prefix, names.pci_path, names.bcma_core))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_PATH", str);
- if (names.pci_slot[0])
- if (snprintf(str, sizeof(str), "%s%s%s", prefix, names.pci_slot, names.bcma_core) < (int)sizeof(str))
- udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
+ if (names.pci_slot[0] &&
+ snprintf(str, sizeof str, "%s%s%s", prefix, names.pci_slot, names.bcma_core))
+ udev_builtin_add_property(dev, test, "ID_NET_NAME_SLOT", str);
goto out;
}
out:
projects / thirdparty / systemd.git / blobdiff