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linux-cp: resync with kernel after nl socket error

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Type: improvement

Currently, if an error happens on the netlink notification socket, the
socket gets reopened. A portion of notification messages have been lost
because of this and will never arrive on the socket. VPP will be out of
sync with the kernel networking state.

With this change, synchronize VPP state and the kernel networking state
if there was an error polling or reading the notification socket.

Signed-off-by: Alexander Chernavin <achernavin@netgate.com>
Change-Id: I8cdff89b505cd227535a0acaadb6ee757204c45e
This commit is contained in:
Alexander Chernavin
2021-10-20 12:15:43 +00:00
committed by Matthew Smith
parent 758ec13718
commit 3819205bdb
2 changed files with 503 additions and 27 deletions
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490
src/plugins/linux-cp/lcp_nl.c
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File diff suppressed because it is too large Load Diff

40
src/plugins/linux-cp/lcp_nl.h
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@@ -21,9 +21,13 @@
#include <netlink/route/addr.h>
typedef void (*nl_rt_link_cb_t) (struct rtnl_link *rl, void *ctx);
typedef void (*nl_rt_link_sync_cb_t) (void);
typedef void (*nl_rt_addr_cb_t) (struct rtnl_addr *ra);
typedef void (*nl_rt_addr_sync_cb_t) (void);
typedef void (*nl_rt_neigh_cb_t) (struct rtnl_neigh *rr);
typedef void (*nl_rt_neigh_sync_cb_t) (void);
typedef void (*nl_rt_route_cb_t) (struct rtnl_route *rn);
typedef void (*nl_rt_route_sync_cb_t) (void);
#define NL_RT_COMMON uword is_mp_safe
@@ -34,6 +38,13 @@ typedef struct nl_rt_link_t_
nl_rt_link_cb_t cb;
} nl_rt_link_t;
typedef struct nl_rt_link_sync_t_
{
NL_RT_COMMON;
nl_rt_link_sync_cb_t cb;
} nl_rt_link_sync_t;
typedef struct nl_rt_addr_t_
{
NL_RT_COMMON;
@@ -41,6 +52,13 @@ typedef struct nl_rt_addr_t_
nl_rt_addr_cb_t cb;
} nl_rt_addr_t;
typedef struct nl_rt_addr_sync_t_
{
NL_RT_COMMON;
nl_rt_addr_sync_cb_t cb;
} nl_rt_addr_sync_t;
typedef struct nl_rt_neigh_t_
{
NL_RT_COMMON;
@@ -48,6 +66,13 @@ typedef struct nl_rt_neigh_t_
nl_rt_neigh_cb_t cb;
} nl_rt_neigh_t;
typedef struct nl_rt_neigh_sync_t_
{
NL_RT_COMMON;
nl_rt_neigh_sync_cb_t cb;
} nl_rt_neigh_sync_t;
typedef struct nl_rt_route_t_
{
NL_RT_COMMON;
@@ -55,18 +80,33 @@ typedef struct nl_rt_route_t_
nl_rt_route_cb_t cb;
} nl_rt_route_t;
typedef struct nl_rt_route_sync_t_
{
NL_RT_COMMON;
nl_rt_route_sync_cb_t cb;
} nl_rt_route_sync_t;
#undef NL_RT_COMMON
typedef struct nl_vft_t_
{
nl_rt_link_t nvl_rt_link_add;
nl_rt_link_t nvl_rt_link_del;
nl_rt_link_sync_t nvl_rt_link_sync_begin;
nl_rt_link_sync_t nvl_rt_link_sync_end;
nl_rt_addr_t nvl_rt_addr_add;
nl_rt_addr_t nvl_rt_addr_del;
nl_rt_addr_sync_t nvl_rt_addr_sync_begin;
nl_rt_addr_sync_t nvl_rt_addr_sync_end;
nl_rt_neigh_t nvl_rt_neigh_add;
nl_rt_neigh_t nvl_rt_neigh_del;
nl_rt_neigh_sync_t nvl_rt_neigh_sync_begin;
nl_rt_neigh_sync_t nvl_rt_neigh_sync_end;
nl_rt_route_t nvl_rt_route_add;
nl_rt_route_t nvl_rt_route_del;
nl_rt_route_sync_t nvl_rt_route_sync_begin;
nl_rt_route_sync_t nvl_rt_route_sync_end;
} nl_vft_t;
extern void nl_register_vft (const nl_vft_t *nv);