diff options
| author | Taehee Yoo <ap420073@gmail.com> | 2021-03-25 16:16:54 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-26 15:14:56 -0700 |
| commit | 4b200e398953c237c86d32bf26d4cb2a96556a6f (patch) | |
| tree | 40febf5ba26cff9106672157f1f3f51612933847 /include/net/if_inet6.h | |
| parent | 882ba1f73c06831f2a21044ebd8864c485ac04f2 (diff) | |
mld: convert ip6_sf_list to RCU
The ip6_sf_list has been protected by mca_lock(spin_lock) so that the
critical section is atomic context. In order to switch this context,
changing locking is needed. The ip6_sf_list actually already protected
by RTNL So if it's converted to use RCU, its control path context can
be switched to sleepable.
But It doesn't remove mca_lock yet because ifmcaddr6 isn't converted
to RCU yet. So, It's not fully converted to the sleepable context.
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/if_inet6.h')
| -rw-r--r-- | include/net/if_inet6.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h index 062294aeeb6d..7875a3208426 100644 --- a/include/net/if_inet6.h +++ b/include/net/if_inet6.h @@ -97,12 +97,13 @@ struct ipv6_mc_socklist { }; struct ip6_sf_list { - struct ip6_sf_list *sf_next; + struct ip6_sf_list __rcu *sf_next; struct in6_addr sf_addr; unsigned long sf_count[2]; /* include/exclude counts */ unsigned char sf_gsresp; /* include in g & s response? */ unsigned char sf_oldin; /* change state */ unsigned char sf_crcount; /* retrans. left to send */ + struct rcu_head rcu; }; #define MAF_TIMER_RUNNING 0x01 @@ -115,8 +116,8 @@ struct ifmcaddr6 { struct in6_addr mca_addr; struct inet6_dev *idev; struct ifmcaddr6 *next; - struct ip6_sf_list *mca_sources; - struct ip6_sf_list *mca_tomb; + struct ip6_sf_list __rcu *mca_sources; + struct ip6_sf_list __rcu *mca_tomb; unsigned int mca_sfmode; unsigned char mca_crcount; unsigned long mca_sfcount[2]; |