mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-07-17 15:17:17 +00:00
util: support functions for mac/portprofile associations on hostdev
This patch adds the following: - functions to set and get vf configs - Functions to replace and store vf configs (Only mac address is handled today. But the functions can be easily extended for vlans and other vf configs) - function to dump link dev info (This is moved from virnetdevvportprofile.c) Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
This commit is contained in:
Roopa Prabhu
Laine Stump
parent
b8b702734c
commit
5095bf06f1
@ -1213,11 +1213,15 @@ virNetDevGetMTU;
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virNetDevGetPhysicalFunction;
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virNetDevGetVLanID;
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virNetDevGetVirtualFunctionIndex;
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virNetDevGetVirtualFunctionInfo;
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virNetDevGetVirtualFunctions;
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virNetDevIsOnline;
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virNetDevIsVirtualFunction;
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virNetDevLinkDump;
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virNetDevReplaceMacAddress;
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virNetDevReplaceNetConfig;
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virNetDevRestoreMacAddress;
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virNetDevRestoreNetConfig;
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virNetDevSetIPv4Address;
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virNetDevSetMAC;
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virNetDevSetMTU;
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@ -1127,8 +1127,47 @@ virNetDevGetPhysicalFunction(const char *ifname, char **pfname)
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return ret;
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}
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#else /* !__linux__ */
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/**
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* virNetDevGetVirtualFunctionInfo:
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* @vfname: name of the virtual function interface
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* @pfname: name of the physical function
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* @vf: vf index
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*
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* Returns 0 on success, -errno on failure.
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*
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*/
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int
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virNetDevGetVirtualFunctionInfo(const char *vfname, char **pfname,
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int *vf)
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{
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char *pf_sysfs_path = NULL, *vf_sysfs_path = NULL;
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int ret = -1;
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*pfname = NULL;
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if (virNetDevGetPhysicalFunction(vfname, pfname) < 0)
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return ret;
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if (virNetDevSysfsFile(&pf_sysfs_path, *pfname, "device") < 0)
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goto cleanup;
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if (virNetDevSysfsFile(&vf_sysfs_path, vfname, "device") < 0)
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goto cleanup;
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ret = pciGetVirtualFunctionIndex(pf_sysfs_path, vf_sysfs_path, vf);
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cleanup:
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if (ret < 0)
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VIR_FREE(*pfname);
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VIR_FREE(vf_sysfs_path);
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VIR_FREE(pf_sysfs_path);
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return ret;
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}
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#else /* !__linux__ */
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int
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virNetDevGetVirtualFunctions(const char *pfname ATTRIBUTE_UNUSED,
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char ***vfname ATTRIBUTE_UNUSED,
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@ -1165,4 +1204,509 @@ virNetDevGetPhysicalFunction(const char *ifname ATTRIBUTE_UNUSED,
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_("Unable to get physical function status on this platform"));
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return -1;
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}
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int
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virNetDevGetVirtualFunctionInfo(const char *vfname ATTRIBUTE_UNUSED,
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char **pfname ATTRIBUTE_UNUSED,
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int *vf ATTRIBUTE_UNUSED)
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{
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virReportSystemError(ENOSYS, "%s",
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_("Unable to get virtual function info on this platform"));
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return -1;
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}
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#endif /* !__linux__ */
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#if defined(__linux__) && defined(HAVE_LIBNL)
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static struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
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[IFLA_VF_MAC] = { .type = NLA_UNSPEC,
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.maxlen = sizeof(struct ifla_vf_mac) },
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[IFLA_VF_VLAN] = { .type = NLA_UNSPEC,
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.maxlen = sizeof(struct ifla_vf_vlan) },
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};
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/**
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* virNetDevLinkDump:
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*
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* @ifname: The name of the interface; only use if ifindex < 0
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* @ifindex: The interface index; may be < 0 if ifname is given
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* @nltarget_kernel: whether to send the message to the kernel or another
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* process
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* @nlattr: pointer to a pointer of netlink attributes that will contain
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* the results
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* @recvbuf: Pointer to the buffer holding the returned netlink response
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* message; free it, once not needed anymore
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* @getPidFunc: Pointer to a function that will be invoked if the kernel
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* is not the target of the netlink message but it is to be
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* sent to another process.
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*
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* Get information about an interface given its name or index.
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*
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* Returns 0 on success, -1 on fatal error.
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*/
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int
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virNetDevLinkDump(const char *ifname, int ifindex,
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bool nltarget_kernel, struct nlattr **tb,
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unsigned char **recvbuf,
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uint32_t (*getPidFunc)(void))
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{
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int rc = 0;
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struct nlmsghdr *resp;
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struct nlmsgerr *err;
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struct ifinfomsg ifinfo = {
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.ifi_family = AF_UNSPEC,
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.ifi_index = ifindex
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};
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unsigned int recvbuflen;
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uint32_t pid = 0;
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struct nl_msg *nl_msg;
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*recvbuf = NULL;
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if (ifname && ifindex <= 0 && virNetDevGetIndex(ifname, &ifindex) < 0)
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return -1;
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ifinfo.ifi_index = ifindex;
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nl_msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST);
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if (!nl_msg) {
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virReportOOMError();
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return -1;
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}
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if (nlmsg_append(nl_msg, &ifinfo, sizeof(ifinfo), NLMSG_ALIGNTO) < 0)
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goto buffer_too_small;
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if (ifname) {
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if (nla_put(nl_msg, IFLA_IFNAME, strlen(ifname)+1, ifname) < 0)
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goto buffer_too_small;
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}
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if (!nltarget_kernel) {
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pid = getPidFunc();
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if (pid == 0) {
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rc = -1;
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goto cleanup;
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}
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}
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if (virNetlinkCommand(nl_msg, recvbuf, &recvbuflen, pid) < 0) {
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rc = -1;
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goto cleanup;
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}
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if (recvbuflen < NLMSG_LENGTH(0) || *recvbuf == NULL)
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goto malformed_resp;
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resp = (struct nlmsghdr *)*recvbuf;
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switch (resp->nlmsg_type) {
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case NLMSG_ERROR:
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err = (struct nlmsgerr *)NLMSG_DATA(resp);
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if (resp->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
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goto malformed_resp;
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if (err->error) {
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virReportSystemError(-err->error,
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_("error dumping %s (%d) interface"),
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ifname, ifindex);
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rc = -1;
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}
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break;
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case GENL_ID_CTRL:
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case NLMSG_DONE:
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rc = nlmsg_parse(resp, sizeof(struct ifinfomsg),
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tb, IFLA_MAX, NULL);
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if (rc < 0)
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goto malformed_resp;
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break;
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default:
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goto malformed_resp;
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}
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if (rc != 0)
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VIR_FREE(*recvbuf);
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cleanup:
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nlmsg_free(nl_msg);
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return rc;
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malformed_resp:
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nlmsg_free(nl_msg);
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virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("malformed netlink response message"));
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VIR_FREE(*recvbuf);
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return -1;
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buffer_too_small:
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nlmsg_free(nl_msg);
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virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("allocated netlink buffer is too small"));
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return -1;
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}
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static int
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virNetDevSetVfConfig(const char *ifname, int ifindex, int vf,
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bool nltarget_kernel, const unsigned char *macaddr,
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int vlanid, uint32_t (*getPidFunc)(void))
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{
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int rc = -1;
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struct nlmsghdr *resp;
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struct nlmsgerr *err;
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unsigned char *recvbuf = NULL;
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unsigned int recvbuflen = 0;
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uint32_t pid = 0;
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struct nl_msg *nl_msg;
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struct nlattr *vfinfolist, *vfinfo;
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struct ifinfomsg ifinfo = {
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.ifi_family = AF_UNSPEC,
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.ifi_index = ifindex
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};
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if (!macaddr && vlanid < 0)
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return -1;
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nl_msg = nlmsg_alloc_simple(RTM_SETLINK, NLM_F_REQUEST);
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if (!nl_msg) {
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virReportOOMError();
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return rc;
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}
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if (nlmsg_append(nl_msg, &ifinfo, sizeof(ifinfo), NLMSG_ALIGNTO) < 0)
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goto buffer_too_small;
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if (ifname &&
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nla_put(nl_msg, IFLA_IFNAME, strlen(ifname)+1, ifname) < 0)
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goto buffer_too_small;
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if (!(vfinfolist = nla_nest_start(nl_msg, IFLA_VFINFO_LIST)))
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goto buffer_too_small;
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if (!(vfinfo = nla_nest_start(nl_msg, IFLA_VF_INFO)))
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goto buffer_too_small;
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if (macaddr) {
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struct ifla_vf_mac ifla_vf_mac = {
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.vf = vf,
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.mac = { 0, },
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};
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memcpy(ifla_vf_mac.mac, macaddr, VIR_MAC_BUFLEN);
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if (nla_put(nl_msg, IFLA_VF_MAC, sizeof(ifla_vf_mac),
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&ifla_vf_mac) < 0)
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goto buffer_too_small;
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}
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if (vlanid >= 0) {
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struct ifla_vf_vlan ifla_vf_vlan = {
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.vf = vf,
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.vlan = vlanid,
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.qos = 0,
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};
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if (nla_put(nl_msg, IFLA_VF_VLAN, sizeof(ifla_vf_vlan),
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&ifla_vf_vlan) < 0)
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goto buffer_too_small;
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}
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nla_nest_end(nl_msg, vfinfo);
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nla_nest_end(nl_msg, vfinfolist);
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if (!nltarget_kernel) {
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pid = getPidFunc();
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if (pid == 0) {
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rc = -1;
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goto cleanup;
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}
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}
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if (virNetlinkCommand(nl_msg, &recvbuf, &recvbuflen, pid) < 0)
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goto cleanup;
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if (recvbuflen < NLMSG_LENGTH(0) || recvbuf == NULL)
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goto malformed_resp;
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resp = (struct nlmsghdr *)recvbuf;
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switch (resp->nlmsg_type) {
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case NLMSG_ERROR:
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err = (struct nlmsgerr *)NLMSG_DATA(resp);
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if (resp->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
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goto malformed_resp;
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if (err->error) {
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virReportSystemError(-err->error,
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_("error during set %s of ifindex %d"),
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(macaddr ? (vlanid >= 0 ? "mac/vlan" : "mac") : "vlanid"),
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ifindex);
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goto cleanup;
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}
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break;
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case NLMSG_DONE:
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break;
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default:
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goto malformed_resp;
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}
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rc = 0;
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cleanup:
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nlmsg_free(nl_msg);
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VIR_FREE(recvbuf);
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return rc;
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malformed_resp:
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nlmsg_free(nl_msg);
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virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("malformed netlink response message"));
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VIR_FREE(recvbuf);
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return rc;
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buffer_too_small:
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nlmsg_free(nl_msg);
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virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("allocated netlink buffer is too small"));
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return rc;
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}
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static int
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virNetDevParseVfConfig(struct nlattr **tb, int32_t vf, unsigned char *mac,
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int *vlanid)
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{
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const char *msg = NULL;
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int rc = -1;
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if (tb[IFLA_VFINFO_LIST]) {
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struct ifla_vf_mac *vf_mac;
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struct ifla_vf_vlan *vf_vlan;
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struct nlattr *tb_vf_info = {NULL, };
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struct nlattr *tb_vf[IFLA_VF_MAX+1];
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int found = 0;
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int rem;
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nla_for_each_nested(tb_vf_info, tb[IFLA_VFINFO_LIST], rem) {
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if (nla_type(tb_vf_info) != IFLA_VF_INFO)
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continue;
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if (nla_parse_nested(tb_vf, IFLA_VF_MAX, tb_vf_info,
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ifla_vf_policy)) {
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msg = _("error parsing IFLA_VF_INFO");
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goto cleanup;
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}
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if (tb[IFLA_VF_MAC]) {
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vf_mac = RTA_DATA(tb_vf[IFLA_VF_MAC]);
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if (vf_mac && vf_mac->vf == vf) {
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memcpy(mac, vf_mac->mac, VIR_MAC_BUFLEN);
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found = 1;
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}
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}
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if (tb[IFLA_VF_VLAN]) {
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vf_vlan = RTA_DATA(tb_vf[IFLA_VF_VLAN]);
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if (vf_vlan && vf_vlan->vf == vf) {
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*vlanid = vf_vlan->vlan;
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found = 1;
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}
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}
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if (found) {
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rc = 0;
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break;
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}
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}
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}
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cleanup:
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if (msg)
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virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s", msg);
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return rc;
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}
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static int
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virNetDevGetVfConfig(const char *ifname, int vf, unsigned char *mac,
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int *vlanid)
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{
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int rc = -1;
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unsigned char *recvbuf = NULL;
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struct nlattr *tb[IFLA_MAX + 1] = {NULL, };
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int ifindex = -1;
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rc = virNetDevLinkDump(ifname, ifindex, true, tb, &recvbuf, NULL);
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if (rc < 0)
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return rc;
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rc = virNetDevParseVfConfig(tb, vf, mac, vlanid);
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VIR_FREE(recvbuf);
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return rc;
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}
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static int
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virNetDevReplaceVfConfig(const char *pflinkdev, int vf,
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const unsigned char *macaddress,
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int vlanid,
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const char *stateDir)
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{
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unsigned char oldmac[6];
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int oldvlanid = -1;
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char *path = NULL;
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char macstr[VIR_MAC_STRING_BUFLEN];
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int ifindex = -1;
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if (virNetDevGetVfConfig(pflinkdev, vf, oldmac, &oldvlanid) < 0)
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return -1;
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if (virAsprintf(&path, "%s/%s_vf%d",
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stateDir, pflinkdev, vf) < 0) {
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virReportOOMError();
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return -1;
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}
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virMacAddrFormat(oldmac, macstr);
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if (virFileWriteStr(path, macstr, O_CREAT|O_TRUNC|O_WRONLY) < 0) {
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virReportSystemError(errno, _("Unable to preserve mac for pf = %s,"
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" vf = %d"), pflinkdev, vf);
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VIR_FREE(path);
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return -1;
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}
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VIR_FREE(path);
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return virNetDevSetVfConfig(pflinkdev, ifindex, vf, true,
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macaddress, vlanid, NULL);
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}
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static int
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virNetDevRestoreVfConfig(const char *pflinkdev, int vf,
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const char *stateDir)
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{
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int rc = -1;
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char *macstr = NULL;
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char *path = NULL;
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unsigned char oldmac[6];
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int vlanid = -1;
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int ifindex = -1;
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if (virAsprintf(&path, "%s/%s_vf%d",
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stateDir, pflinkdev, vf) < 0) {
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virReportOOMError();
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return rc;
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}
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if (virFileReadAll(path, VIR_MAC_STRING_BUFLEN, &macstr) < 0) {
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goto cleanup;
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}
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if (virMacAddrParse(macstr, &oldmac[0]) != 0) {
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virNetDevError(VIR_ERR_INTERNAL_ERROR,
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_("Cannot parse MAC address from '%s'"),
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macstr);
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goto cleanup;
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}
|
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/*reset mac and remove file-ignore results*/
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rc = virNetDevSetVfConfig(pflinkdev, ifindex, vf, true,
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oldmac, vlanid, NULL);
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ignore_value(unlink(path));
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cleanup:
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VIR_FREE(path);
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VIR_FREE(macstr);
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return rc;
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}
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/**
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* virNetDevReplaceNetConfig:
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* @linkdev: name of the interface
|
||||
* @vf: vf index if linkdev is a pf
|
||||
* @macaddress: new MAC address for interface
|
||||
* @vlanid: new vlanid
|
||||
* @stateDir: directory to store old net config
|
||||
*
|
||||
* Returns 0 on success, -1 on failure
|
||||
*
|
||||
*/
|
||||
int
|
||||
virNetDevReplaceNetConfig(char *linkdev, int vf,
|
||||
const unsigned char *macaddress, int vlanid,
|
||||
char *stateDir)
|
||||
{
|
||||
if (vf == -1)
|
||||
return virNetDevReplaceMacAddress(linkdev, macaddress, stateDir);
|
||||
else
|
||||
return virNetDevReplaceVfConfig(linkdev, vf, macaddress, vlanid,
|
||||
stateDir);
|
||||
}
|
||||
|
||||
/**
|
||||
* virNetDevRestoreNetConfig:
|
||||
* @linkdev: name of the interface
|
||||
* @vf: vf index if linkdev is a pf
|
||||
* @stateDir: directory containing old net config
|
||||
*
|
||||
* Returns 0 on success, -errno on failure.
|
||||
*
|
||||
*/
|
||||
int
|
||||
virNetDevRestoreNetConfig(char *linkdev, int vf, char *stateDir)
|
||||
{
|
||||
if (vf == -1)
|
||||
return virNetDevRestoreMacAddress(linkdev, stateDir);
|
||||
else
|
||||
return virNetDevRestoreVfConfig(linkdev, vf, stateDir);
|
||||
}
|
||||
|
||||
#else /* defined(__linux__) && defined(HAVE_LIBNL) */
|
||||
|
||||
int
|
||||
virNetDevLinkDump(const char *ifname ATTRIBUTE_UNUSED,
|
||||
int ifindex ATTRIBUTE_UNUSED,
|
||||
bool nltarget_kernel ATTRIBUTE_UNUSED,
|
||||
struct nlattr **tb ATTRIBUTE_UNUSED,
|
||||
unsigned char **recvbuf ATTRIBUTE_UNUSED,
|
||||
uint32_t (*getPidFunc)(void) ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to dump link info on this platform"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
int
|
||||
virNetDevReplaceNetConfig(char *linkdev ATTRIBUTE_UNUSED,
|
||||
int vf ATTRIBUTE_UNUSED,
|
||||
const unsigned char *macaddress ATTRIBUTE_UNUSED,
|
||||
int vlanid ATTRIBUTE_UNUSED,
|
||||
char *stateDir ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to replace net config on this platform"));
|
||||
return -1;
|
||||
|
||||
}
|
||||
|
||||
int
|
||||
virNetDevRestoreNetConfig(char *linkdev ATTRIBUTE_UNUSED,
|
||||
int vf ATTRIBUTE_UNUSED,
|
||||
char *stateDir ATTRIBUTE_UNUSED)
|
||||
{
|
||||
virReportSystemError(ENOSYS, "%s",
|
||||
_("Unable to restore net config on this platform"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
#endif /* defined(__linux__) && defined(HAVE_LIBNL) */
|
||||
|
||||
@ -24,6 +24,7 @@
|
||||
# define __VIR_NETDEV_H__
|
||||
|
||||
# include "virsocketaddr.h"
|
||||
# include "virnetlink.h"
|
||||
|
||||
int virNetDevExists(const char *brname)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
|
||||
@ -105,4 +106,22 @@ int virNetDevGetVirtualFunctions(const char *pfname,
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
|
||||
ATTRIBUTE_RETURN_CHECK;
|
||||
|
||||
int virNetDevLinkDump(const char *ifname, int ifindex,
|
||||
bool nltarget_kernel, struct nlattr **tb,
|
||||
unsigned char **recvbuf,
|
||||
uint32_t (*getPidFunc)(void))
|
||||
ATTRIBUTE_RETURN_CHECK;
|
||||
|
||||
int virNetDevReplaceNetConfig(char *linkdev, int vf,
|
||||
const unsigned char *macaddress, int vlanid,
|
||||
char *stateDir)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(5);
|
||||
|
||||
int virNetDevRestoreNetConfig(char *linkdev, int vf, char *stateDir)
|
||||
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(3);
|
||||
|
||||
int virNetDevGetVirtualFunctionInfo(const char *vfname, char **pfname,
|
||||
int *vf)
|
||||
ATTRIBUTE_NONNULL(1);
|
||||
|
||||
#endif /* __VIR_NETDEV_H__ */
|
||||
|
||||
@ -31,6 +31,7 @@
|
||||
|
||||
struct nl_msg;
|
||||
struct sockaddr_nl;
|
||||
struct nlattr;
|
||||
|
||||
# endif /* __linux__ */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user