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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/吉藤英明 <hideaki.yoshifuji@miraclelinux.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hannes Frederic Sowa 2015-03-23 23:36:03 +01:00 committed by David S. Miller
parent 64236f3f3d
commit 8e8e676d0b
2 changed files with 16 additions and 18 deletions
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3
include/net/if_inet6.h
View File

@ -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;

31
net/ipv6/addrconf.c
View File

@ -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 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
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 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
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 @@ static int addrconf_ifdown(struct net_device *dev, int how)
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);