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| author | Amit Cohen <amcohen@nvidia.com> | 2021-02-07 10:22:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-02-08 16:47:03 -0800 |
| commit | 648106c30a635e18fb55da60d4fcbfca6f6483ac (patch) | |
| tree | 8bf0d51e10d0bcc84786245467b8fa09bb20a271 | |
| parent | 36c5100e859d93b3436ae24810612b05addb1e89 (diff) | |
| download | linux-stable-648106c30a635e18fb55da60d4fcbfca6f6483ac.tar.gz linux-stable-648106c30a635e18fb55da60d4fcbfca6f6483ac.tar.bz2 linux-stable-648106c30a635e18fb55da60d4fcbfca6f6483ac.zip | |
IPv4: Extend 'fib_notify_on_flag_change' sysctl
Add the value '2' to 'fib_notify_on_flag_change' to allow sending
notifications only for failed route installation.
Separate value is added for such notifications because there are less of
them, so they do not impact performance and some users will find them more
important.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/networking/ip-sysctl.rst | 3 | ||||
| -rw-r--r-- | net/ipv4/fib_trie.c | 6 | ||||
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 2 |
3 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index 61a358301f12..cd0ec577a5b5 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -180,7 +180,7 @@ min_adv_mss - INTEGER fib_notify_on_flag_change - INTEGER Whether to emit RTM_NEWROUTE notifications whenever RTM_F_OFFLOAD/ - RTM_F_TRAP flags are changed. + RTM_F_TRAP/RTM_F_OFFLOAD_FAILED flags are changed. After installing a route to the kernel, user space receives an acknowledgment, which means the route was installed in the kernel, @@ -197,6 +197,7 @@ fib_notify_on_flag_change - INTEGER - 0 - Do not emit notifications. - 1 - Emit notifications. + - 2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change. IP Fragmentation: diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 80147caa9bfd..25cf387cca5b 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1053,6 +1053,12 @@ void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri) fa_match->offload = fri->offload; fa_match->trap = fri->trap; + + /* 2 means send notifications only if offload_failed was changed. */ + if (net->ipv4.sysctl_fib_notify_on_flag_change == 2 && + fa_match->offload_failed == fri->offload_failed) + goto out; + fa_match->offload_failed = fri->offload_failed; if (!net->ipv4.sysctl_fib_notify_on_flag_change) diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index e5798b3b59d2..f55095d3ed16 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -1361,7 +1361,7 @@ static struct ctl_table ipv4_net_table[] = { .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, - .extra2 = SYSCTL_ONE, + .extra2 = &two, }, { } }; |