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Date: Wed, 19 Dec 2018 19:54:19 -0800
From: David Ahern <dsahern@...nel.org>
To: netdev@...r.kernel.org
Cc: stephen@...workplumber.org, David Ahern <dsahern@...il.com>
Subject: [PATCH iproute2-next 04/12] ip route: Remove rtnl_rtcache_request
From: David Ahern <dsahern@...il.com>
Add a filter option to rtnl_routedump_req and use it to set rtm_flags
removing the need for rtnl_rtcache_request for dump requests.
Signed-off-by: David Ahern <dsahern@...il.com>
---
include/libnetlink.h | 7 ++++---
ip/ipmroute.c | 2 +-
ip/iproute.c | 43 ++++++++++++++-----------------------------
lib/libnetlink.c | 12 +++++++++++-
4 files changed, 30 insertions(+), 34 deletions(-)
diff --git a/include/libnetlink.h b/include/libnetlink.h
index 138840d5c892..b0051f390980 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -47,11 +47,14 @@ int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
void rtnl_close(struct rtnl_handle *rth);
+typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen);
+
int rtnl_addrdump_req(struct rtnl_handle *rth, int family)
__attribute__((warn_unused_result));
int rtnl_addrlbldump_req(struct rtnl_handle *rth, int family)
__attribute__((warn_unused_result));
-int rtnl_routedump_req(struct rtnl_handle *rth, int family)
+int rtnl_routedump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
__attribute__((warn_unused_result));
int rtnl_ruledump_req(struct rtnl_handle *rth, int family)
__attribute__((warn_unused_result));
@@ -71,8 +74,6 @@ int rtnl_linkdump_req(struct rtnl_handle *rth, int fam)
int rtnl_linkdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
__attribute__((warn_unused_result));
-typedef int (*req_filter_fn_t)(struct nlmsghdr *nlh, int reqlen);
-
int rtnl_linkdump_req_filter_fn(struct rtnl_handle *rth, int fam,
req_filter_fn_t fn)
__attribute__((warn_unused_result));
diff --git a/ip/ipmroute.c b/ip/ipmroute.c
index 4d8867d3219f..de7a035f852f 100644
--- a/ip/ipmroute.c
+++ b/ip/ipmroute.c
@@ -283,7 +283,7 @@ static int mroute_list(int argc, char **argv)
filter.iif = idx;
}
- if (rtnl_routedump_req(&rth, filter.af) < 0) {
+ if (rtnl_routedump_req(&rth, filter.af, NULL) < 0) {
perror("Cannot send dump request");
return 1;
}
diff --git a/ip/iproute.c b/ip/iproute.c
index d34724692553..3c0be0a96d4e 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -1535,24 +1535,6 @@ static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
return 0;
}
-static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
-{
- struct {
- struct nlmsghdr nlh;
- struct rtmsg rtm;
- } req = {
- .nlh.nlmsg_len = sizeof(req),
- .nlh.nlmsg_type = RTM_GETROUTE,
- .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
- .nlh.nlmsg_seq = rth->dump = ++rth->seq,
- .rtm.rtm_family = family,
- .rtm.rtm_flags = RTM_F_CLONED,
- };
- struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
-
- return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
-}
-
static int iproute_flush_cache(void)
{
#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
@@ -1644,7 +1626,7 @@ static int iproute_flush(int do_ipv6, rtnl_filter_t filter_fn)
filter.flushe = sizeof(flushb);
for (;;) {
- if (rtnl_routedump_req(&rth, do_ipv6) < 0) {
+ if (rtnl_routedump_req(&rth, do_ipv6, NULL) < 0) {
perror("Cannot send dump request");
return -2;
}
@@ -1684,6 +1666,16 @@ static int iproute_flush(int do_ipv6, rtnl_filter_t filter_fn)
}
}
+static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
+{
+ struct rtmsg *rtm = NLMSG_DATA(nlh);
+
+ if (filter.cloned)
+ rtm->rtm_flags |= RTM_F_CLONED;
+
+ return 0;
+}
+
static int iproute_list_flush_or_save(int argc, char **argv, int action)
{
int do_ipv6 = preferred_family;
@@ -1889,16 +1881,9 @@ static int iproute_list_flush_or_save(int argc, char **argv, int action)
if (action == IPROUTE_FLUSH)
return iproute_flush(do_ipv6, filter_fn);
- if (!filter.cloned) {
- if (rtnl_routedump_req(&rth, do_ipv6) < 0) {
- perror("Cannot send dump request");
- return -2;
- }
- } else {
- if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
- perror("Cannot send dump request");
- return -2;
- }
+ if (rtnl_routedump_req(&rth, do_ipv6, iproute_dump_filter) < 0) {
+ perror("Cannot send dump request");
+ return -2;
}
new_json_obj(json);
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index b9c37fd36211..56a1cadeb3db 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -266,11 +266,13 @@ int rtnl_addrlbldump_req(struct rtnl_handle *rth, int family)
return send(rth->fd, &req, sizeof(req), 0);
}
-int rtnl_routedump_req(struct rtnl_handle *rth, int family)
+int rtnl_routedump_req(struct rtnl_handle *rth, int family,
+ req_filter_fn_t filter_fn)
{
struct {
struct nlmsghdr nlh;
struct rtmsg rtm;
+ char buf[128];
} req = {
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
.nlh.nlmsg_type = RTM_GETROUTE,
@@ -279,6 +281,14 @@ int rtnl_routedump_req(struct rtnl_handle *rth, int family)
.rtm.rtm_family = family,
};
+ if (filter_fn) {
+ int err;
+
+ err = filter_fn(&req.nlh, sizeof(req));
+ if (err)
+ return err;
+ }
+
return send(rth->fd, &req, sizeof(req), 0);
}
--
2.11.0
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