From 41a49cc3c02ace59d4dddae91ea211c330970ee3 Mon Sep 17 00:00:00 2001 From: Masahide NAKAMURA Date: Wed, 23 Aug 2006 22:48:31 -0700 Subject: [PATCH] [XFRM]: Add sorting interface for state and template. Under two transformation policies it is required to merge them. This is a platform to sort state for outbound and templates for inbound respectively. It will be used when Mobile IPv6 and IPsec are used at the same time. Signed-off-by: Masahide NAKAMURA Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- include/net/xfrm.h | 20 ++++++++++++++++++++ net/xfrm/xfrm_policy.c | 16 ++++++++++++++-- net/xfrm/xfrm_state.c | 38 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 72 insertions(+), 2 deletions(-) diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 4655ca25f8..d341603e4b 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -254,6 +254,8 @@ struct xfrm_state_afinfo { struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create); + int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); + int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); }; extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); @@ -1002,6 +1004,24 @@ extern int xfrm_state_add(struct xfrm_state *x); extern int xfrm_state_update(struct xfrm_state *x); extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family); extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); +#ifdef CONFIG_XFRM_SUB_POLICY +extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, + int n, unsigned short family); +extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, + int n, unsigned short family); +#else +static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, + int n, unsigned short family) +{ + return -ENOSYS; +} + +static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, + int n, unsigned short family) +{ + return -ENOSYS; +} +#endif extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); extern int xfrm_state_delete(struct xfrm_state *x); extern void xfrm_state_flush(u8 proto); diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 96de6c76ed..1732159ffd 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -861,6 +861,8 @@ xfrm_tmpl_resolve(struct xfrm_policy **pols, int npols, struct flowi *fl, struct xfrm_state **xfrm, unsigned short family) { + struct xfrm_state *tp[XFRM_MAX_DEPTH]; + struct xfrm_state **tpp = (npols > 1) ? tp : xfrm; int cnx = 0; int error; int ret; @@ -871,7 +873,8 @@ xfrm_tmpl_resolve(struct xfrm_policy **pols, int npols, struct flowi *fl, error = -ENOBUFS; goto fail; } - ret = xfrm_tmpl_resolve_one(pols[i], fl, &xfrm[cnx], family); + + ret = xfrm_tmpl_resolve_one(pols[i], fl, &tpp[cnx], family); if (ret < 0) { error = ret; goto fail; @@ -879,11 +882,15 @@ xfrm_tmpl_resolve(struct xfrm_policy **pols, int npols, struct flowi *fl, cnx += ret; } + /* found states are sorted for outbound processing */ + if (npols > 1) + xfrm_state_sort(xfrm, tpp, cnx, family); + return cnx; fail: for (cnx--; cnx>=0; cnx--) - xfrm_state_put(xfrm[cnx]); + xfrm_state_put(tpp[cnx]); return error; } @@ -1280,6 +1287,7 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, struct sec_path *sp; static struct sec_path dummy; struct xfrm_tmpl *tp[XFRM_MAX_DEPTH]; + struct xfrm_tmpl *stp[XFRM_MAX_DEPTH]; struct xfrm_tmpl **tpp = tp; int ti = 0; int i, k; @@ -1297,6 +1305,10 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, tpp[ti++] = &pols[pi]->xfrm_vec[i]; } xfrm_nr = ti; + if (npols > 1) { + xfrm_tmpl_sort(stp, tpp, xfrm_nr, family); + tpp = stp; + } /* For each tunnel xfrm, find the first matching tmpl. * For each tmpl before that, find corresponding xfrm. diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index a26ef6952c..622e92a08d 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -728,6 +728,44 @@ xfrm_find_acq(u8 mode, u32 reqid, u8 proto, } EXPORT_SYMBOL(xfrm_find_acq); +#ifdef CONFIG_XFRM_SUB_POLICY +int +xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, + unsigned short family) +{ + int err = 0; + struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); + if (!afinfo) + return -EAFNOSUPPORT; + + spin_lock_bh(&xfrm_state_lock); + if (afinfo->tmpl_sort) + err = afinfo->tmpl_sort(dst, src, n); + spin_unlock_bh(&xfrm_state_lock); + xfrm_state_put_afinfo(afinfo); + return err; +} +EXPORT_SYMBOL(xfrm_tmpl_sort); + +int +xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, + unsigned short family) +{ + int err = 0; + struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); + if (!afinfo) + return -EAFNOSUPPORT; + + spin_lock_bh(&xfrm_state_lock); + if (afinfo->state_sort) + err = afinfo->state_sort(dst, src, n); + spin_unlock_bh(&xfrm_state_lock); + xfrm_state_put_afinfo(afinfo); + return err; +} +EXPORT_SYMBOL(xfrm_state_sort); +#endif + /* Silly enough, but I'm lazy to build resolution list */ static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq) -- 2.39.5