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Date: Wed, 12 Sep 2007 16:55:27 +0400
From: Pavel Emelyanov <xemul@...nvz.org>
To: "Eric W. Biederman" <ebiederm@...ssion.com>
CC: Stephen Hemminger <shemminger@...ux-foundation.org>,
netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH 1/4] [IPROUTE2] Revert "Make ip utility veth driver aware"
Eric W. Biederman wrote:
> Stephen it looks like you weren't cc'd on the latest version
> of the veth support. So this patchset first reverts the old
He was. The latest version looks completely different from what
is reversed in this patch.
> version of the veth support you merged. Then merges a tested
> version of the veth support.
>
> This reverts commit 4ed390ce43d1ec7c881721f312260df901d8390d.
>
> Conflicts:
>
> ip/ip.c
> ---
> ip/Makefile | 2 +-
> ip/ip.c | 4 +-
> ip/veth.c | 196 -----------------------------------------------------------
> ip/veth.h | 17 -----
> 4 files changed, 2 insertions(+), 217 deletions(-)
> delete mode 100644 ip/veth.c
> delete mode 100644 ip/veth.h
>
> diff --git a/ip/Makefile b/ip/Makefile
> index 209c5c8..9a5bfe3 100644
> --- a/ip/Makefile
> +++ b/ip/Makefile
> @@ -1,7 +1,7 @@
> IPOBJ=ip.o ipaddress.o iproute.o iprule.o \
> rtm_map.o iptunnel.o ip6tunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
> ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o \
> - ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o veth.o
> + ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o
>
> RTMONOBJ=rtmon.o
>
> diff --git a/ip/ip.c b/ip/ip.c
> index 829fc64..4bdb83b 100644
> --- a/ip/ip.c
> +++ b/ip/ip.c
> @@ -27,7 +27,6 @@
> #include "SNAPSHOT.h"
> #include "utils.h"
> #include "ip_common.h"
> -#include "veth.h"
>
> int preferred_family = AF_UNSPEC;
> int show_stats = 0;
> @@ -48,7 +47,7 @@ static void usage(void)
> "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
> " ip [ -force ] [-batch filename\n"
> "where OBJECT := { link | addr | route | rule | neigh | ntable | tunnel |\n"
> -" maddr | mroute | monitor | xfrm | veth }\n"
> +" maddr | mroute | monitor | xfrm }\n"
> " OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
> " -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
> " -o[neline] | -t[imestamp] }\n");
> @@ -78,7 +77,6 @@ static const struct cmd {
> { "monitor", do_ipmonitor },
> { "xfrm", do_xfrm },
> { "mroute", do_multiroute },
> - { "veth", do_veth },
> { "help", do_help },
> { 0 }
> };
> diff --git a/ip/veth.c b/ip/veth.c
> deleted file mode 100644
> index d4eecc8..0000000
> --- a/ip/veth.c
> +++ /dev/null
> @@ -1,196 +0,0 @@
> -/*
> - * veth.c "ethernet tunnel"
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License
> - * as published by the Free Software Foundation; either version
> - * 2 of the License, or (at your option) any later version.
> - *
> - * Authors: Pavel Emelianov, <xemul@...nvz.org>
> - *
> - */
> -
> -#include <stdio.h>
> -#include <string.h>
> -#include <unistd.h>
> -#include <sys/types.h>
> -#include <sys/socket.h>
> -#include <linux/genetlink.h>
> -
> -#include "utils.h"
> -#include "veth.h"
> -
> -#define GENLMSG_DATA(glh) ((void *)(NLMSG_DATA(glh) + GENL_HDRLEN))
> -#define NLA_DATA(na) ((void *)((char*)(na) + NLA_HDRLEN))
> -
> -static int do_veth_help(void)
> -{
> - fprintf(stderr, "Usage: ip veth add DEVICE PEER_NAME\n");
> - fprintf(stderr, " del DEVICE\n");
> - exit(-1);
> -}
> -
> -static int genl_ctrl_resolve_family(const char *family)
> -{
> - struct rtnl_handle rth;
> - struct nlmsghdr *nlh;
> - struct genlmsghdr *ghdr;
> - int ret = 0;
> - struct {
> - struct nlmsghdr n;
> - char buf[4096];
> - } req;
> -
> - memset(&req, 0, sizeof(req));
> -
> - nlh = &req.n;
> - nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
> - nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
> - nlh->nlmsg_type = GENL_ID_CTRL;
> -
> - ghdr = NLMSG_DATA(&req.n);
> - ghdr->cmd = CTRL_CMD_GETFAMILY;
> -
> - if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
> - fprintf(stderr, "Cannot open generic netlink socket\n");
> - exit(1);
> - }
> -
> - addattr_l(nlh, 128, CTRL_ATTR_FAMILY_NAME, family, strlen(family) + 1);
> -
> - if (rtnl_talk(&rth, nlh, 0, 0, nlh, NULL, NULL) < 0) {
> - fprintf(stderr, "Error talking to the kernel\n");
> - goto errout;
> - }
> -
> - {
> - struct rtattr *tb[CTRL_ATTR_MAX + 1];
> - struct genlmsghdr *ghdr = NLMSG_DATA(nlh);
> - int len = nlh->nlmsg_len;
> - struct rtattr *attrs;
> -
> - if (nlh->nlmsg_type != GENL_ID_CTRL) {
> - fprintf(stderr, "Not a controller message, nlmsg_len=%d "
> - "nlmsg_type=0x%x\n", nlh->nlmsg_len, nlh->nlmsg_type);
> - goto errout;
> - }
> -
> - if (ghdr->cmd != CTRL_CMD_NEWFAMILY) {
> - fprintf(stderr, "Unkown controller command %d\n", ghdr->cmd);
> - goto errout;
> - }
> -
> - len -= NLMSG_LENGTH(GENL_HDRLEN);
> -
> - if (len < 0) {
> - fprintf(stderr, "wrong controller message len %d\n", len);
> - return -1;
> - }
> -
> - attrs = (struct rtattr *) ((char *) ghdr + GENL_HDRLEN);
> - parse_rtattr(tb, CTRL_ATTR_MAX, attrs, len);
> -
> - if (tb[CTRL_ATTR_FAMILY_ID] == NULL) {
> - fprintf(stderr, "Missing family id TLV\n");
> - goto errout;
> - }
> -
> - ret = *(__u16 *) RTA_DATA(tb[CTRL_ATTR_FAMILY_ID]);
> - }
> -
> -errout:
> - rtnl_close(&rth);
> - return ret;
> -}
> -
> -static int do_veth_operate(char *dev, char *peer, int cmd)
> -{
> - struct rtnl_handle rth;
> - struct nlmsghdr *nlh;
> - struct genlmsghdr *ghdr;
> - struct nlattr *attr;
> - struct {
> - struct nlmsghdr n;
> - struct genlmsghdr h;
> - char bug[1024];
> - } req;
> - int family, len;
> - int err = 0;
> -
> - family = genl_ctrl_resolve_family("veth");
> - if (family == 0) {
> - fprintf(stderr, "veth: Can't resolve family\n");
> - exit(1);
> - }
> -
> - if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0)
> - exit(1);
> -
> - nlh = &req.n;
> - nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
> - nlh->nlmsg_flags = NLM_F_REQUEST;
> - nlh->nlmsg_type = family;
> - nlh->nlmsg_seq = 0;
> -
> - ghdr = &req.h;
> - ghdr->cmd = cmd;
> -
> - attr = (struct nlattr *) GENLMSG_DATA(&req);
> - len = strlen(dev);
> - attr->nla_type = VETH_ATTR_DEVNAME;
> - attr->nla_len = len + 1 + NLA_HDRLEN;
> - memcpy(NLA_DATA(attr), dev, len);
> - nlh->nlmsg_len += NLMSG_ALIGN(attr->nla_len);
> -
> - if (peer) {
> - attr = (struct nlattr *)((char *)attr +
> - NLMSG_ALIGN(attr->nla_len));
> - len = strlen(peer);
> - attr->nla_type = VETH_ATTR_PEERNAME;
> - attr->nla_len = len + 1 + NLA_HDRLEN;
> - memcpy(NLA_DATA(attr), peer, len);
> - nlh->nlmsg_len += NLMSG_ALIGN(attr->nla_len);
> - }
> -
> - if (rtnl_send(&rth, (char *) &req, nlh->nlmsg_len) < 0) {
> - err = -1;
> - fprintf(stderr, "Error talking to the kernel (add)\n");
> - }
> -
> - rtnl_close(&rth);
> - return err;
> -}
> -
> -static int do_veth_add(int argc, char **argv)
> -{
> - if (argc < 2)
> - return do_veth_help();
> -
> - return do_veth_operate(argv[0], argv[1], VETH_CMD_ADD);
> -}
> -
> -static int do_veth_del(int argc, char **argv)
> -{
> - char *name;
> -
> - if (argc < 1)
> - return do_veth_help();
> -
> - return do_veth_operate(argv[0], NULL, VETH_CMD_DEL);
> -}
> -
> -int do_veth(int argc, char **argv)
> -{
> - if (argc == 0)
> - return do_veth_help();
> -
> - if (strcmp(*argv, "add") == 0 || strcmp(*argv, "a") == 0)
> - return do_veth_add(argc - 1, argv + 1);
> - if (strcmp(*argv, "del") == 0 || strcmp(*argv, "d") == 0)
> - return do_veth_del(argc - 1, argv + 1);
> - if (strcmp(*argv, "help") == 0)
> - return do_veth_help();
> -
> - fprintf(stderr, "Command \"%s\" is unknown, try \"ip veth help\".\n", *argv);
> - exit(-1);
> -}
> diff --git a/ip/veth.h b/ip/veth.h
> deleted file mode 100644
> index 4d7b357..0000000
> --- a/ip/veth.h
> +++ /dev/null
> @@ -1,17 +0,0 @@
> -int do_veth(int argc, char **argv);
> -
> -enum {
> - VETH_CMD_UNSPEC,
> - VETH_CMD_ADD,
> - VETH_CMD_DEL,
> -
> - VETH_CMD_MAX
> -};
> -
> -enum {
> - VETH_ATTR_UNSPEC,
> - VETH_ATTR_DEVNAME,
> - VETH_ATTR_PEERNAME,
> -
> - VETH_ATTR_MAX
> -};
-
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