ca273dc953
This gives a lot of operational problems later. It's definitely reasonable
to be able to create tap interfaces in other namespaces, and this is
still possible (see below for syntax).
However, changing the runtime netns makes the netlink listener much more
complicated because it will have to listen on not just one netns, but all
of them, for netlink updates.
So, for now, let's remove the ability to set the namespace in the API.
Still possible:
- set at startup.conf in lcpng { netns <x> }
- force creating in 'lcpng create ... netns <x>'
This will nudge folks to create one singular namespace (say,
'dataplane', in the startup.conf), and then handle all netlink messages
in that namespace only.
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
/*
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* Copyright (c) 2020 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sched.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <plugins/lcpng/lcpng.h>
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lcp_main_t lcp_main;
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u8 *
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lcp_get_netns (void)
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{
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lcp_main_t *lcpm = &lcp_main;
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if (lcpm->netns_name[0] == 0)
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return 0;
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return lcpm->netns_name;
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}
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int
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lcp_get_netns_fd (void)
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{
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lcp_main_t *lcpm = &lcp_main;
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return lcpm->netns_fd;
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}
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/*
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* ns is expected to be or look like a NUL-terminated C string.
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*/
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int
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lcp_set_netns (u8 *ns)
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{
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lcp_main_t *lcpm = &lcp_main;
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char *p;
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int len;
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u8 *s;
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p = (char *) ns;
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len = clib_strnlen (p, LCP_NS_LEN);
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if (len >= LCP_NS_LEN)
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return -1;
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if (!p || *p == 0)
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{
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clib_memset (lcpm->netns_name, 0,
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sizeof (lcpm->netns_name));
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if (lcpm->netns_fd > 0)
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close (lcpm->netns_fd);
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lcpm->netns_fd = 0;
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return 0;
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}
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clib_strncpy ((char *) lcpm->netns_name, p, LCP_NS_LEN - 1);
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s = format (0, "/var/run/netns/%s%c", (char *) lcpm->netns_name, 0);
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lcpm->netns_fd = open ((char *) s, O_RDONLY);
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vec_free (s);
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return 0;
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}
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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