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netlink: Explicitly pass netlink sockets to operations

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All the netlink operations currently implicitly use one of the two global
netlink sockets, sometimes depending on an 'ns' parameter.  Change them
all to explicitly take the socket to use (or two sockets to use in the case
of the *_dup() functions).  As well as making these functions strictly more
general, it makes the callers easier to follow because we're passing a
socket variable with a name rather than an unexplained '0' or '1' for the
ns parameter.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: Minor formatting changes in pasta_ns_conf()]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2023-08-03 17:19:44 +10:00 • committed by Stefano Brivio
parent cfe7509e5c
commit 576df71e8b
4 changed files with 105 additions and 76 deletions

28
netlink.h
View file

@ -6,17 +6,23 @@
#ifndef NETLINK_H
#define NETLINK_H
extern int nl_sock;
extern int nl_sock_ns;
void nl_sock_init(const struct ctx *c, bool ns);
unsigned int nl_get_ext_if(sa_family_t af);
void nl_route_get_def(unsigned int ifi, sa_family_t af, void *gw);
void nl_route_set_def(unsigned int ifi, sa_family_t af, void *gw);
void nl_route_dup(unsigned int ifi, unsigned int ifi_ns, sa_family_t af);
void nl_addr_get(unsigned int ifi, sa_family_t af, void *addr,
int *prefix_len, void *addr_l);
void nl_addr_set(unsigned int ifi, sa_family_t af, void *addr, int prefix_len);
void nl_addr_dup(unsigned int ifi, unsigned int ifi_ns, sa_family_t af);
void nl_link_get_mac(int ns, unsigned int ifi, void *mac);
void nl_link_set_mac(int ns, unsigned int ifi, void *mac);
void nl_link_up(int ns, unsigned int ifi, int mtu);
unsigned int nl_get_ext_if(int s, sa_family_t af);
void nl_route_get_def(int s, unsigned int ifi, sa_family_t af, void *gw);
void nl_route_set_def(int s, unsigned int ifi, sa_family_t af, void *gw);
void nl_route_dup(int s_src, unsigned int ifi_src,
int s_dst, unsigned int ifi_dst, sa_family_t af);
void nl_addr_get(int s, unsigned int ifi, sa_family_t af,
void *addr, int *prefix_len, void *addr_l);
void nl_addr_set(int s, unsigned int ifi, sa_family_t af,
void *addr, int prefix_len);
void nl_addr_dup(int s_src, unsigned int ifi_src,
int s_dst, unsigned int ifi_dst, sa_family_t af);
void nl_link_get_mac(int s, unsigned int ifi, void *mac);
void nl_link_set_mac(int s, unsigned int ifi, void *mac);
void nl_link_up(int s, unsigned int ifi, int mtu);
#endif /* NETLINK_H */