From 8e8e676d0b3c7f074c719c7c05b20296b9b0b0b1 Mon Sep 17 00:00:00 2001
From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Mon, 23 Mar 2015 23:36:03 +0100
Subject: [PATCH] ipv6: collapse state_lock and lock
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Cc: Erik Kline <ek@google.com>
Cc: Fernando Gont <fgont@si6networks.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: YOSHIFUJI Hideaki/åè¤è±æ <hideaki.yoshifuji@miraclelinux.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/if_inet6.h | 3 +--
net/ipv6/addrconf.c | 31 +++++++++++++++----------------
2 files changed, 16 insertions(+), 18 deletions(-)
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index 98e5f9578f86..d89397a22903 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -41,13 +41,12 @@ enum {
struct inet6_ifaddr {
struct in6_addr addr;
__u32 prefix_len;
-
+
/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
__u32 valid_lft;
__u32 prefered_lft;
atomic_t refcnt;
spinlock_t lock;
- spinlock_t state_lock;
int state;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c2357b6f62dd..1cc5320e510f 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -873,7 +873,6 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
ifa->peer_addr = *peer_addr;
spin_lock_init(&ifa->lock);
- spin_lock_init(&ifa->state_lock);
INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work);
INIT_HLIST_NODE(&ifa->addr_lst);
ifa->scope = scope;
@@ -1016,10 +1015,10 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
ASSERT_RTNL();
- spin_lock_bh(&ifp->state_lock);
+ spin_lock_bh(&ifp->lock);
state = ifp->state;
ifp->state = INET6_IFADDR_STATE_DEAD;
- spin_unlock_bh(&ifp->state_lock);
+ spin_unlock_bh(&ifp->lock);
if (state == INET6_IFADDR_STATE_DEAD)
goto out;
@@ -1699,12 +1698,12 @@ static int addrconf_dad_end(struct inet6_ifaddr *ifp)
{
int err = -ENOENT;
- spin_lock_bh(&ifp->state_lock);
+ spin_lock_bh(&ifp->lock);
if (ifp->state == INET6_IFADDR_STATE_DAD) {
ifp->state = INET6_IFADDR_STATE_POSTDAD;
err = 0;
}
- spin_unlock_bh(&ifp->state_lock);
+ spin_unlock_bh(&ifp->lock);
return err;
}
@@ -1737,10 +1736,10 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp)
}
}
- spin_lock_bh(&ifp->state_lock);
+ spin_lock_bh(&ifp->lock);
/* transition from _POSTDAD to _ERRDAD */
ifp->state = INET6_IFADDR_STATE_ERRDAD;
- spin_unlock_bh(&ifp->state_lock);
+ spin_unlock_bh(&ifp->lock);
addrconf_mod_dad_work(ifp, 0);
}
@@ -2369,7 +2368,7 @@ ok:
u32 stored_lft;
/* update lifetime (RFC2462 5.5.3 e) */
- spin_lock(&ifp->lock);
+ spin_lock_bh(&ifp->lock);
now = jiffies;
if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
@@ -2399,12 +2398,12 @@ ok:
ifp->tstamp = now;
flags = ifp->flags;
ifp->flags &= ~IFA_F_DEPRECATED;
- spin_unlock(&ifp->lock);
+ spin_unlock_bh(&ifp->lock);
if (!(flags&IFA_F_TENTATIVE))
ipv6_ifa_notify(0, ifp);
} else
- spin_unlock(&ifp->lock);
+ spin_unlock_bh(&ifp->lock);
manage_tempaddrs(in6_dev, ifp, valid_lft, prefered_lft,
create, now);
@@ -3265,10 +3264,10 @@ restart:
write_unlock_bh(&idev->lock);
- spin_lock_bh(&ifa->state_lock);
+ spin_lock_bh(&ifa->lock);
state = ifa->state;
ifa->state = INET6_IFADDR_STATE_DEAD;
- spin_unlock_bh(&ifa->state_lock);
+ spin_unlock_bh(&ifa->lock);
if (state != INET6_IFADDR_STATE_DEAD) {
__ipv6_ifa_notify(RTM_DELADDR, ifa);
@@ -3426,12 +3425,12 @@ static void addrconf_dad_start(struct inet6_ifaddr *ifp)
{
bool begin_dad = false;
- spin_lock_bh(&ifp->state_lock);
+ spin_lock_bh(&ifp->lock);
if (ifp->state != INET6_IFADDR_STATE_DEAD) {
ifp->state = INET6_IFADDR_STATE_PREDAD;
begin_dad = true;
}
- spin_unlock_bh(&ifp->state_lock);
+ spin_unlock_bh(&ifp->lock);
if (begin_dad)
addrconf_mod_dad_work(ifp, 0);
@@ -3453,7 +3452,7 @@ static void addrconf_dad_work(struct work_struct *w)
rtnl_lock();
- spin_lock_bh(&ifp->state_lock);
+ spin_lock_bh(&ifp->lock);
if (ifp->state == INET6_IFADDR_STATE_PREDAD) {
action = DAD_BEGIN;
ifp->state = INET6_IFADDR_STATE_DAD;
@@ -3461,7 +3460,7 @@ static void addrconf_dad_work(struct work_struct *w)
action = DAD_ABORT;
ifp->state = INET6_IFADDR_STATE_POSTDAD;
}
- spin_unlock_bh(&ifp->state_lock);
+ spin_unlock_bh(&ifp->lock);
if (action == DAD_BEGIN) {
addrconf_dad_begin(ifp);
--
2.34.1