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| author | Sergey V. Lobanov <sergey@lobanov.in> | 2021-12-20 18:00:32 +0300 |
|---|---|---|
| committer | Sergey V. Lobanov <sergey@lobanov.in> | 2021-12-20 18:00:32 +0300 |
| commit | 5249bf6428e70aa489aa9b8c44b16935c391a7fe (patch) | |
| tree | 8234db2351aca96b5c957ad99d47fdea37697a20 /accel-pppd/net.c | |
| parent | 385c4038c451f5c181136070846cab0664dae43a (diff) | |
| download | accel-ppp-5249bf6428e70aa489aa9b8c44b16935c391a7fe.tar.gz accel-ppp-5249bf6428e70aa489aa9b8c44b16935c391a7fe.zip | |
T55: add netlink buffer size configuration parameters
Netlink buffers may overflow so it might be useful to increase send and receive
netlink buffer sizes.
Two parameters to [common] configuration section added: nl-rcv-buffer,
nl-snd-buffer.
It is required to set (sysctl) net.core.wmem_max>=nl-snd-buffer and
net.core.rmem_max>=nl-rcv-buffer before running accel-pppd
To check current netlink buffer size and related info use the following command:
% ss -f netlink -m
0 0 rtnl:kernel * skmem:(r0,rb212992,t0,tb212992,f0,w0,o0,bl0,d0)
0 0 rtnl:-1140221812 * skmem:(r0,rb2048000,t0,tb80000,f0,w0,o0,bl0,d0)
0 0 rtnl:accel-pppd/14285 * skmem:(r0,rb2048000,t0,tb65536,f0,w0,o0,bl0,d0)
...
(Please check man ss to get the meaning for r,rb,t,tb,f,w,o,bl and d params)
In the ss output you will see the values doubled from configured.
First accel-pppd netlink socket will use default values (rcv=1048576, snd=32768)
regardless of configured nl-rcv-buffer and nl-snd-buffer values.
Signed-off-by: Sergey V. Lobanov <sergey@lobanov.in>
Diffstat (limited to 'accel-pppd/net.c')
| -rw-r--r-- | accel-pppd/net.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/accel-pppd/net.c b/accel-pppd/net.c index 26373fc..c619dee 100644 --- a/accel-pppd/net.c +++ b/accel-pppd/net.c @@ -45,6 +45,9 @@ __export __thread struct ap_net *net; __export struct ap_net *def_net; static int def_ns_fd; +__export int conf_nl_rcvbuf = 1024 * 1024; +__export int conf_nl_sndbuf = -1; + static int def_socket(int domain, int type, int proto) { return socket(domain, type, proto); @@ -432,6 +435,14 @@ static void __init init() { const char *opt; + opt = conf_get_opt("common", "nl-rcv-buffer"); + if (opt) + conf_nl_rcvbuf = atoi(opt); + + opt = conf_get_opt("common", "nl-snd-buffer"); + if (opt) + conf_nl_sndbuf = atoi(opt); + opt = conf_get_opt("common", "netns-run-dir"); if (opt) conf_netns_run_dir = opt; |