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lib: add vrf_ioctl API

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That API can be used to wrap the ioctl call with various vrf instances.
This permits transparently doing the ioctl() call without taking into
consideration the vrf backend kind.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2018-02-05 17:00:45 +01:00
parent 9dab51ac71
commit 516d7591d6
3 changed files with 23 additions and 12 deletions
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20
lib/vrf.c
View File

@ -815,6 +815,26 @@ int vrf_getaddrinfo(const char *node, const char *service,
return ret;
}
int vrf_ioctl(vrf_id_t vrf_id, int d, unsigned long request, char *params)
{
int ret, saved_errno, rc;
ret = vrf_switch_to_netns(vrf_id);
if (ret < 0) {
zlog_err("%s: Can't switch to VRF %u (%s)",
__func__, vrf_id, safe_strerror(errno));
return 0;
}
rc = ioctl(d, request, params);
saved_errno = errno;
ret = vrf_switchback_to_initial();
if (ret < 0)
zlog_err("%s: Can't switchback from VRF %u (%s)",
__func__, vrf_id, safe_strerror(errno));
errno = saved_errno;
return rc;
}
int vrf_sockunion_socket(const union sockunion *su, vrf_id_t vrf_id)
{
int ret, save_errno, ret2;

2
lib/vrf.h
View File

@ -216,6 +216,8 @@ extern int vrf_getaddrinfo(const char *node, const char *service,
const struct addrinfo *hints,
struct addrinfo **res, vrf_id_t vrf_id);
extern int vrf_ioctl(vrf_id_t vrf_id, int d, unsigned long request, char *args);
/* function called by macro VRF_DEFAULT
* to get the default VRF_ID
*/

13
zebra/if_netlink.c
View File

@ -351,7 +351,6 @@ static int get_iflink_speed(struct interface *interface)
struct ethtool_cmd ecmd;
int sd;
int rc;
int ret, saved_errno;
const char *ifname = interface->name;
/* initialize struct */
@ -376,17 +375,7 @@ static int get_iflink_speed(struct interface *interface)
return 0;
}
/* Get the current link state for the interface */
ret = vrf_switch_to_netns(interface->vrf_id);
if (ret < 0)
zlog_err("%s: Can't switch to VRF %u (%s)",
__func__, interface->vrf_id, safe_strerror(errno));
rc = ioctl(sd, SIOCETHTOOL, (char *)&ifdata);
saved_errno = errno;
ret = vrf_switchback_to_initial();
if (ret < 0)
zlog_err("%s: Can't switchback from VRF %u (%s)",
__func__, interface->vrf_id, safe_strerror(errno));
errno = saved_errno;
rc = vrf_ioctl(interface->vrf_id, sd, SIOCETHTOOL, (char *)&ifdata);
if (zserv_privs.change(ZPRIVS_LOWER))
zlog_err("Can't lower privileges");
if (rc < 0) {