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teamd: introduce simple SR-IOV support
Just warn user if he is teaming virt functions belonging under same physical function. Signed-off-by: Jiri Pirko <jiri@resnulli.us>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| /* | ||
| * teamd_sriov.c - SR-IOV support for teamd | ||
| * Copyright (C) 2013 Jiri Pirko <jiri@resnulli.us> | ||
| * | ||
| * This library 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. | ||
| * | ||
| * This library 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 this library; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| #include <stdio.h> | ||
| #include <errno.h> | ||
| #include <sys/types.h> | ||
| #include <sys/stat.h> | ||
| #include <unistd.h> | ||
|
|
||
| #include "teamd.h" | ||
|
|
||
| struct pcie_addr { | ||
| uint16_t domain; | ||
| uint8_t bus; | ||
| uint8_t slot; | ||
| uint8_t function; | ||
| }; | ||
|
|
||
| static int teamd_sriov_physfn_addr(struct pcie_addr *addr, const char *ifname) | ||
| { | ||
| char link[256]; | ||
| char *path; | ||
| char *start; | ||
| int ret; | ||
|
|
||
| ret = asprintf(&path, "/sys/class/net/%s/device/physfn", ifname); | ||
| if (ret == -1) | ||
| return -ENOMEM; | ||
|
|
||
| ret = readlink(path, link, sizeof(link)); | ||
| free(path); | ||
| if (ret == -1) | ||
| return -errno; | ||
|
|
||
| start = strrchr(link, '/'); | ||
| if (!start) | ||
| return -EINVAL; | ||
| start++; | ||
| memset(addr, 0, sizeof(*addr)); | ||
| ret = sscanf(start, "%04x:%02x:%02x.%x", (unsigned int *) &addr->domain, | ||
| (unsigned int *) &addr->bus, | ||
| (unsigned int *) &addr->slot, | ||
| (unsigned int *) &addr->function); | ||
| if (ret != 4) | ||
| return -EINVAL; | ||
| return 0; | ||
| } | ||
|
|
||
| static int teamd_sriov_event_watch_port_added(struct teamd_context *ctx, | ||
| struct teamd_port *tdport, | ||
| void *priv) | ||
| { | ||
| struct pcie_addr physfnaddr; | ||
| struct pcie_addr cur_physfnaddr; | ||
| struct teamd_port *cur_tdport; | ||
| int err; | ||
|
|
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| err = teamd_sriov_physfn_addr(&physfnaddr, tdport->ifname); | ||
| if (err) | ||
| return 0; | ||
|
|
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| teamd_for_each_tdport(cur_tdport, ctx) { | ||
| if (cur_tdport == tdport) | ||
| continue; | ||
| err = teamd_sriov_physfn_addr(&cur_physfnaddr, | ||
| cur_tdport->ifname); | ||
| if (err) | ||
| continue; | ||
| if (!memcmp(&physfnaddr, &cur_physfnaddr, sizeof(physfnaddr))) | ||
| teamd_log_warn("%s: port is virtual function of same physical function as port %s. Note that teaming virtual functions of the same physical function makes no sense.", | ||
| tdport->ifname, cur_tdport->ifname); | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| static const struct teamd_event_watch_ops teamd_sriov_event_watch_ops = { | ||
| .port_added = teamd_sriov_event_watch_port_added, | ||
| }; | ||
|
|
||
| int teamd_sriov_init(struct teamd_context *ctx) | ||
| { | ||
| int err; | ||
|
|
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| err = teamd_event_watch_register(ctx, &teamd_sriov_event_watch_ops, | ||
| NULL); | ||
| if (err) { | ||
| teamd_log_err("Failed to register event watch."); | ||
| return err; | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| void teamd_sriov_fini(struct teamd_context *ctx) | ||
| { | ||
| teamd_event_watch_unregister(ctx, &teamd_sriov_event_watch_ops, | ||
| NULL); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| /* | ||
| * teamd_sriov.h - SR-IOV support for teamd | ||
| * Copyright (C) 2013 Jiri Pirko <jiri@resnulli.us> | ||
| * | ||
| * This library 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. | ||
| * | ||
| * This library 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 this library; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| #ifndef _TEAMD_SRIOV_H_ | ||
| #define _TEAMD_SRIOV_H_ | ||
|
|
||
| #include <jansson.h> | ||
|
|
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| int teamd_sriov_init(struct teamd_context *ctx); | ||
| void teamd_sriov_fini(struct teamd_context *ctx); | ||
|
|
||
| #endif /* _TEAMD_SRIOV_H_ */ |