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Message-Id: <20210213175127.28300-1-ap420073@gmail.com>
Date: Sat, 13 Feb 2021 17:51:27 +0000
From: Taehee Yoo <ap420073@...il.com>
To: davem@...emloft.net, kuba@...nel.org, xiyou.wangcong@...il.com,
netdev@...r.kernel.org, jwi@...ux.ibm.com, kgraul@...ux.ibm.com,
hca@...ux.ibm.com, gor@...ux.ibm.com, borntraeger@...ibm.com,
mareklindner@...mailbox.ch, sw@...onwunderlich.de, a@...table.cc,
sven@...fation.org, yoshfuji@...ux-ipv6.org, dsahern@...nel.org
Cc: Taehee Yoo <ap420073@...il.com>
Subject: [PATCH net-next v2 2/7] mld: separate two flags from ifmcaddr6->mca_flags
In the ifmcaddr6->mca_flags, there are follows flags.
MAF_TIMER_RUNNING
MAF_LAST_REPORTER
MAF_LOADED
MAF_NOREPORT
MAF_GSQUERY
The mca_flags value will be protected by a spinlock since
the next patches. But MAF_LOADED and MAF_NOREPORT do not need
spinlock because they will be protected by RTNL.
So, if they are separated from mca_flags, it could reduce atomic context.
Suggested-by: Cong Wang <xiyou.wangcong@...il.com>
Signed-off-by: Taehee Yoo <ap420073@...il.com>
---
v1 -> v2:
- Separated from previous big one patch.
include/net/if_inet6.h | 8 ++++----
net/ipv6/mcast.c | 26 +++++++++++---------------
2 files changed, 15 insertions(+), 19 deletions(-)
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index af5244c9ca5c..bec372283ac0 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -107,9 +107,7 @@ struct ip6_sf_list {
#define MAF_TIMER_RUNNING 0x01
#define MAF_LAST_REPORTER 0x02
-#define MAF_LOADED 0x04
-#define MAF_NOREPORT 0x08
-#define MAF_GSQUERY 0x10
+#define MAF_GSQUERY 0x04
struct ifmcaddr6 {
struct in6_addr mca_addr;
@@ -121,7 +119,9 @@ struct ifmcaddr6 {
unsigned char mca_crcount;
unsigned long mca_sfcount[2];
struct delayed_work mca_work;
- unsigned int mca_flags;
+ unsigned char mca_flags;
+ bool mca_noreport;
+ bool mca_loaded;
int mca_users;
refcount_t mca_refcnt;
spinlock_t mca_lock;
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 80597dc56f2a..1f7fd3fbb4b6 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -661,15 +661,13 @@ static void igmp6_group_added(struct ifmcaddr6 *mc)
IPV6_ADDR_SCOPE_LINKLOCAL)
return;
- spin_lock_bh(&mc->mca_lock);
- if (!(mc->mca_flags&MAF_LOADED)) {
- mc->mca_flags |= MAF_LOADED;
+ if (!mc->mca_loaded) {
+ mc->mca_loaded = true;
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
dev_mc_add(dev, buf);
}
- spin_unlock_bh(&mc->mca_lock);
- if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
+ if (!(dev->flags & IFF_UP) || mc->mca_noreport)
return;
if (mld_in_v1_mode(mc->idev)) {
@@ -697,15 +695,13 @@ static void igmp6_group_dropped(struct ifmcaddr6 *mc)
IPV6_ADDR_SCOPE_LINKLOCAL)
return;
- spin_lock_bh(&mc->mca_lock);
- if (mc->mca_flags&MAF_LOADED) {
- mc->mca_flags &= ~MAF_LOADED;
+ if (mc->mca_loaded) {
+ mc->mca_loaded = false;
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
dev_mc_del(dev, buf);
}
- spin_unlock_bh(&mc->mca_lock);
- if (mc->mca_flags & MAF_NOREPORT)
+ if (mc->mca_noreport)
return;
if (!mc->idev->dead)
@@ -868,7 +864,7 @@ static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev,
if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
- mc->mca_flags |= MAF_NOREPORT;
+ mc->mca_noreport = true;
return mc;
}
@@ -1733,7 +1729,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
int scount, stotal, first, isquery, truncate;
unsigned int mtu;
- if (pmc->mca_flags & MAF_NOREPORT)
+ if (pmc->mca_noreport)
return skb;
mtu = READ_ONCE(dev->mtu);
@@ -1855,7 +1851,7 @@ static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
read_lock_bh(&idev->lock);
if (!pmc) {
for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
- if (pmc->mca_flags & MAF_NOREPORT)
+ if (pmc->mca_noreport)
continue;
spin_lock_bh(&pmc->mca_lock);
if (pmc->mca_sfcount[MCAST_EXCLUDE])
@@ -2149,7 +2145,7 @@ static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
psf_prev->sf_next = psf->sf_next;
else
pmc->mca_sources = psf->sf_next;
- if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
+ if (psf->sf_oldin && !pmc->mca_noreport &&
!mld_in_v1_mode(idev)) {
psf->sf_crcount = idev->mc_qrv;
psf->sf_next = pmc->mca_tomb;
@@ -2410,7 +2406,7 @@ static void igmp6_join_group(struct ifmcaddr6 *ma)
{
unsigned long delay;
- if (ma->mca_flags & MAF_NOREPORT)
+ if (ma->mca_noreport)
return;
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
--
2.17.1
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