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netns xfrm: per-netns policy hash resizing work

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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan 2008-11-25 17:28:57 -08:00 committed by David S. Miller
parent dc2caba7b3
commit 66caf628c3
2 changed files with 27 additions and 26 deletions
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1
include/net/netns/xfrm.h
View file

@ -38,6 +38,7 @@ struct netns_xfrm {
struct hlist_head policy_inexact[XFRM_POLICY_MAX * 2];
struct xfrm_policy_hash policy_bydst[XFRM_POLICY_MAX * 2];
unsigned int policy_count[XFRM_POLICY_MAX * 2];
struct work_struct policy_hash_work;
};
#endif

52
net/xfrm/xfrm_policy.c
View file

@ -396,12 +396,12 @@ static unsigned long xfrm_new_hash_mask(unsigned int old_hmask)
return ((old_hmask + 1) << 1) - 1;
}
static void xfrm_bydst_resize(int dir)
static void xfrm_bydst_resize(struct net *net, int dir)
{
unsigned int hmask = init_net.xfrm.policy_bydst[dir].hmask;
unsigned int hmask = net->xfrm.policy_bydst[dir].hmask;
unsigned int nhashmask = xfrm_new_hash_mask(hmask);
unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head);
struct hlist_head *odst = init_net.xfrm.policy_bydst[dir].table;
struct hlist_head *odst = net->xfrm.policy_bydst[dir].table;
struct hlist_head *ndst = xfrm_hash_alloc(nsize);
int i;
@ -413,20 +413,20 @@ static void xfrm_bydst_resize(int dir)
for (i = hmask; i >= 0; i--)
xfrm_dst_hash_transfer(odst + i, ndst, nhashmask);
init_net.xfrm.policy_bydst[dir].table = ndst;
init_net.xfrm.policy_bydst[dir].hmask = nhashmask;
net->xfrm.policy_bydst[dir].table = ndst;
net->xfrm.policy_bydst[dir].hmask = nhashmask;
write_unlock_bh(&xfrm_policy_lock);
xfrm_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head));
}
static void xfrm_byidx_resize(int total)
static void xfrm_byidx_resize(struct net *net, int total)
{
unsigned int hmask = init_net.xfrm.policy_idx_hmask;
unsigned int hmask = net->xfrm.policy_idx_hmask;
unsigned int nhashmask = xfrm_new_hash_mask(hmask);
unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head);
struct hlist_head *oidx = init_net.xfrm.policy_byidx;
struct hlist_head *oidx = net->xfrm.policy_byidx;
struct hlist_head *nidx = xfrm_hash_alloc(nsize);
int i;
@ -438,18 +438,18 @@ static void xfrm_byidx_resize(int total)
for (i = hmask; i >= 0; i--)
xfrm_idx_hash_transfer(oidx + i, nidx, nhashmask);
init_net.xfrm.policy_byidx = nidx;
init_net.xfrm.policy_idx_hmask = nhashmask;
net->xfrm.policy_byidx = nidx;
net->xfrm.policy_idx_hmask = nhashmask;
write_unlock_bh(&xfrm_policy_lock);
xfrm_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head));
}
static inline int xfrm_bydst_should_resize(int dir, int *total)
static inline int xfrm_bydst_should_resize(struct net *net, int dir, int *total)
{
unsigned int cnt = init_net.xfrm.policy_count[dir];
unsigned int hmask = init_net.xfrm.policy_bydst[dir].hmask;
unsigned int cnt = net->xfrm.policy_count[dir];
unsigned int hmask = net->xfrm.policy_bydst[dir].hmask;
if (total)
*total += cnt;
@ -461,9 +461,9 @@ static inline int xfrm_bydst_should_resize(int dir, int *total)
return 0;
}
static inline int xfrm_byidx_should_resize(int total)
static inline int xfrm_byidx_should_resize(struct net *net, int total)
{
unsigned int hmask = init_net.xfrm.policy_idx_hmask;
unsigned int hmask = net->xfrm.policy_idx_hmask;
if ((hmask + 1) < xfrm_policy_hashmax &&
total > hmask)
@ -488,25 +488,24 @@ void xfrm_spd_getinfo(struct xfrmk_spdinfo *si)
EXPORT_SYMBOL(xfrm_spd_getinfo);
static DEFINE_MUTEX(hash_resize_mutex);
static void xfrm_hash_resize(struct work_struct *__unused)
static void xfrm_hash_resize(struct work_struct *work)
{
struct net *net = container_of(work, struct net, xfrm.policy_hash_work);
int dir, total;
mutex_lock(&hash_resize_mutex);
total = 0;
for (dir = 0; dir < XFRM_POLICY_MAX * 2; dir++) {
if (xfrm_bydst_should_resize(dir, &total))
xfrm_bydst_resize(dir);
if (xfrm_bydst_should_resize(net, dir, &total))
xfrm_bydst_resize(net, dir);
}
if (xfrm_byidx_should_resize(total))
xfrm_byidx_resize(total);
if (xfrm_byidx_should_resize(net, total))
xfrm_byidx_resize(net, total);
mutex_unlock(&hash_resize_mutex);
}
static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize);
/* Generate new index... KAME seems to generate them ordered by cost
* of an absolute inpredictability of ordering of rules. This will not pass. */
static u32 xfrm_gen_index(int dir)
@ -607,8 +606,8 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
if (delpol)
xfrm_policy_kill(delpol);
else if (xfrm_bydst_should_resize(dir, NULL))
schedule_work(&xfrm_hash_work);
else if (xfrm_bydst_should_resize(&init_net, dir, NULL))
schedule_work(&init_net.xfrm.policy_hash_work);
read_lock_bh(&xfrm_policy_lock);
gc_list = NULL;
@ -1079,8 +1078,8 @@ static void __xfrm_policy_link(struct xfrm_policy *pol, int dir)
init_net.xfrm.policy_count[dir]++;
xfrm_pol_hold(pol);
if (xfrm_bydst_should_resize(dir, NULL))
schedule_work(&xfrm_hash_work);
if (xfrm_bydst_should_resize(&init_net, dir, NULL))
schedule_work(&init_net.xfrm.policy_hash_work);
}
static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol,
@ -2415,6 +2414,7 @@ static int __net_init xfrm_policy_init(struct net *net)
}
INIT_LIST_HEAD(&net->xfrm.policy_all);
INIT_WORK(&net->xfrm.policy_hash_work, xfrm_hash_resize);
if (net_eq(net, &init_net))
register_netdevice_notifier(&xfrm_dev_notifier);
return 0;