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Commit 8100bea7 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by David S. Miller
Browse files

netns xfrm: per-netns xfrm_policy_byidx hashmask 



Per-netns hashes are independently resizeable.

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 93b851c1

include/net/netns/xfrm.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ struct netns_xfrm { 


	struct list_head	policy_all;

	struct hlist_head	*policy_byidx;

	unsigned int		policy_idx_hmask;

};



#endif

net/xfrm/xfrm_policy.c

+7 −8
Original line number Diff line number Diff line
@@ -329,12 +329,11 @@ struct xfrm_policy_hash { 


static struct hlist_head xfrm_policy_inexact[XFRM_POLICY_MAX*2];

static struct xfrm_policy_hash xfrm_policy_bydst[XFRM_POLICY_MAX*2] __read_mostly;

static unsigned int xfrm_idx_hmask __read_mostly;

static unsigned int xfrm_policy_hashmax __read_mostly = 1 * 1024 * 1024;



static inline unsigned int idx_hash(u32 index)

{

	return __idx_hash(index, xfrm_idx_hmask);

	return __idx_hash(index, init_net.xfrm.policy_idx_hmask);

}



static struct hlist_head *policy_hash_bysel(struct xfrm_selector *sel, unsigned short family, int dir)
@@ -434,7 +433,7 @@ static void xfrm_bydst_resize(int dir) 


static void xfrm_byidx_resize(int total)

{

	unsigned int hmask = xfrm_idx_hmask;

	unsigned int hmask = init_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;
@@ -450,7 +449,7 @@ static void xfrm_byidx_resize(int total) 
		xfrm_idx_hash_transfer(oidx + i, nidx, nhashmask);



	init_net.xfrm.policy_byidx = nidx;

	xfrm_idx_hmask = nhashmask;

	init_net.xfrm.policy_idx_hmask = nhashmask;



	write_unlock_bh(&xfrm_policy_lock);
@@ -474,7 +473,7 @@ static inline int xfrm_bydst_should_resize(int dir, int *total) 


static inline int xfrm_byidx_should_resize(int total)

{

	unsigned int hmask = xfrm_idx_hmask;

	unsigned int hmask = init_net.xfrm.policy_idx_hmask;



	if ((hmask + 1) < xfrm_policy_hashmax &&

	    total > hmask)
@@ -492,7 +491,7 @@ void xfrm_spd_getinfo(struct xfrmk_spdinfo *si) 
	si->inscnt = xfrm_policy_count[XFRM_POLICY_IN+XFRM_POLICY_MAX];

	si->outscnt = xfrm_policy_count[XFRM_POLICY_OUT+XFRM_POLICY_MAX];

	si->fwdscnt = xfrm_policy_count[XFRM_POLICY_FWD+XFRM_POLICY_MAX];

	si->spdhcnt = xfrm_idx_hmask;

	si->spdhcnt = init_net.xfrm.policy_idx_hmask;

	si->spdhmcnt = xfrm_policy_hashmax;

	read_unlock_bh(&xfrm_policy_lock);

}
@@ -2410,7 +2409,7 @@ static int __net_init xfrm_policy_init(struct net *net) 
	net->xfrm.policy_byidx = xfrm_hash_alloc(sz);

	if (!net->xfrm.policy_byidx)

		goto out_byidx;

	xfrm_idx_hmask = hmask;

	net->xfrm.policy_idx_hmask = hmask;



	for (dir = 0; dir < XFRM_POLICY_MAX * 2; dir++) {

		struct xfrm_policy_hash *htab;
@@ -2439,7 +2438,7 @@ static void xfrm_policy_fini(struct net *net) 


	WARN_ON(!list_empty(&net->xfrm.policy_all));



	sz = (xfrm_idx_hmask + 1) * sizeof(struct hlist_head);

	sz = (net->xfrm.policy_idx_hmask + 1) * sizeof(struct hlist_head);

	WARN_ON(!hlist_empty(net->xfrm.policy_byidx));

	xfrm_hash_free(net->xfrm.policy_byidx, sz);

}