[SCSI] lpfc 8.1.2: Allow turning on internal loop-back mode

[powerpc.git] / net / xfrm / xfrm_user.c

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 0cdd9a0..7de1755 100644 (file)
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -7,7 +7,7 @@
  *     Kazunori MIYAZAWA @USAGI
  *     Kunihiro Ishiguro <kunihiro@ipinfusion.com>
  *             IPv6 support
- *     
+ *
  */
 
 #include <linux/module.h>
@@ -88,6 +88,34 @@ static int verify_encap_tmpl(struct rtattr **xfrma)
        return 0;
 }
 
+
+static inline int verify_sec_ctx_len(struct rtattr **xfrma)
+{
+       struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
+       struct xfrm_user_sec_ctx *uctx;
+       int len = 0;
+
+       if (!rt)
+               return 0;
+
+       if (rt->rta_len < sizeof(*uctx))
+               return -EINVAL;
+
+       uctx = RTA_DATA(rt);
+
+       if (uctx->ctx_len > PAGE_SIZE)
+               return -EINVAL;
+
+       len += sizeof(struct xfrm_user_sec_ctx);
+       len += uctx->ctx_len;
+
+       if (uctx->len != len)
+               return -EINVAL;
+
+       return 0;
+}
+
+
 static int verify_newsa_info(struct xfrm_usersa_info *p,
                             struct rtattr **xfrma)
 {
@@ -145,6 +173,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
                goto out;
        if ((err = verify_encap_tmpl(xfrma)))
                goto out;
+       if ((err = verify_sec_ctx_len(xfrma)))
+               goto out;
 
        err = -EINVAL;
        switch (p->mode) {
@@ -209,6 +239,30 @@ static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_a
        return 0;
 }
 
+
+static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp)
+{
+       struct xfrm_sec_ctx *xfrm_ctx = xp->security;
+       int len = 0;
+
+       if (xfrm_ctx) {
+               len += sizeof(struct xfrm_user_sec_ctx);
+               len += xfrm_ctx->ctx_len;
+       }
+       return len;
+}
+
+static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
+{
+       struct xfrm_user_sec_ctx *uctx;
+
+       if (!u_arg)
+               return 0;
+
+       uctx = RTA_DATA(u_arg);
+       return security_xfrm_state_alloc(x, uctx);
+}
+
 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
 {
        memcpy(&x->id, &p->id, sizeof(x->id));
@@ -253,6 +307,9 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
        if (err)
                goto error;
 
+       if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
+               goto error;
+
        x->km.seq = p->seq;
 
        return x;
@@ -272,11 +329,11 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
        int err;
        struct km_event c;
 
-       err = verify_newsa_info(p, (struct rtattr **) xfrma);
+       err = verify_newsa_info(p, (struct rtattr **)xfrma);
        if (err)
                return err;
 
-       x = xfrm_state_construct(p, (struct rtattr **) xfrma, &err);
+       x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err);
        if (!x)
                return err;
 
@@ -288,7 +345,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
 
        if (err < 0) {
                x->km.state = XFRM_STATE_DEAD;
-               xfrm_state_put(x);
+               __xfrm_state_put(x);
                goto out;
        }
 
@@ -390,6 +447,19 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
        if (x->encap)
                RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
 
+       if (x->security) {
+               int ctx_size = sizeof(struct xfrm_sec_ctx) +
+                               x->security->ctx_len;
+               struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
+               struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
+
+               uctx->exttype = XFRMA_SEC_CTX;
+               uctx->len = ctx_size;
+               uctx->ctx_doi = x->security->ctx_doi;
+               uctx->ctx_alg = x->security->ctx_alg;
+               uctx->ctx_len = x->security->ctx_len;
+               memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
+       }
        nlh->nlmsg_len = skb->tail - b;
 out:
        sp->this_idx++;
@@ -603,6 +673,18 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
        return verify_policy_dir(p->dir);
 }
 
+static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
+{
+       struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
+       struct xfrm_user_sec_ctx *uctx;
+
+       if (!rt)
+               return 0;
+
+       uctx = RTA_DATA(rt);
+       return security_xfrm_policy_alloc(pol, uctx);
+}
+
 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
                           int nr)
 {
@@ -681,7 +763,10 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p,
        }
 
        copy_from_user_policy(xp, p);
-       err = copy_from_user_tmpl(xp, xfrma);
+
+       if (!(err = copy_from_user_tmpl(xp, xfrma)))
+               err = copy_from_user_sec_ctx(xp, xfrma);
+
        if (err) {
                *errp = err;
                kfree(xp);
@@ -700,10 +785,13 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr
        int excl;
 
        err = verify_newpolicy_info(p);
+       if (err)
+               return err;
+       err = verify_sec_ctx_len((struct rtattr **)xfrma);
        if (err)
                return err;
 
-       xp = xfrm_policy_construct(p, (struct rtattr **) xfrma, &err);
+       xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err);
        if (!xp)
                return err;
 
@@ -714,6 +802,7 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr
        excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
        err = xfrm_policy_insert(p->dir, xp, excl);
        if (err) {
+               security_xfrm_policy_free(xp);
                kfree(xp);
                return err;
        }
@@ -761,6 +850,27 @@ rtattr_failure:
        return -1;
 }
 
+static int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
+{
+       if (xp->security) {
+               int ctx_size = sizeof(struct xfrm_sec_ctx) +
+                               xp->security->ctx_len;
+               struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
+               struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
+
+               uctx->exttype = XFRMA_SEC_CTX;
+               uctx->len = ctx_size;
+               uctx->ctx_doi = xp->security->ctx_doi;
+               uctx->ctx_alg = xp->security->ctx_alg;
+               uctx->ctx_len = xp->security->ctx_len;
+               memcpy(uctx + 1, xp->security->ctx_str, xp->security->ctx_len);
+       }
+       return 0;
+
+ rtattr_failure:
+       return -1;
+}
+
 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
 {
        struct xfrm_dump_info *sp = ptr;
@@ -782,6 +892,8 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr
        copy_to_user_policy(xp, p, dir);
        if (copy_to_user_tmpl(xp, skb) < 0)
                goto nlmsg_failure;
+       if (copy_to_user_sec_ctx(xp, skb))
+               goto nlmsg_failure;
 
        nlh->nlmsg_len = skb->tail - b;
 out:
@@ -852,8 +964,25 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfr
 
        if (p->index)
                xp = xfrm_policy_byid(p->dir, p->index, delete);
-       else
-               xp = xfrm_policy_bysel(p->dir, &p->sel, delete);
+       else {
+               struct rtattr **rtattrs = (struct rtattr **)xfrma;
+               struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1];
+               struct xfrm_policy tmp;
+
+               err = verify_sec_ctx_len(rtattrs);
+               if (err)
+                       return err;
+
+               memset(&tmp, 0, sizeof(struct xfrm_policy));
+               if (rt) {
+                       struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
+
+                       if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
+                               return err;
+               }
+               xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, delete);
+               security_xfrm_policy_free(&tmp);
+       }
        if (xp == NULL)
                return -ENOENT;
 
@@ -1224,6 +1353,8 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
 
        if (copy_to_user_tmpl(xp, skb) < 0)
                goto nlmsg_failure;
+       if (copy_to_user_sec_ctx(xp, skb))
+               goto nlmsg_failure;
 
        nlh->nlmsg_len = skb->tail - b;
        return skb->len;
@@ -1241,6 +1372,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
 
        len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
        len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
+       len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
        skb = alloc_skb(len, GFP_ATOMIC);
        if (skb == NULL)
                return -ENOMEM;
@@ -1324,6 +1456,8 @@ static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
        copy_to_user_policy(xp, &upe->pol, dir);
        if (copy_to_user_tmpl(xp, skb) < 0)
                goto nlmsg_failure;
+       if (copy_to_user_sec_ctx(xp, skb))
+               goto nlmsg_failure;
        upe->hard = !!hard;
 
        nlh->nlmsg_len = skb->tail - b;
@@ -1341,6 +1475,7 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve
 
        len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
        len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
+       len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
        skb = alloc_skb(len, GFP_ATOMIC);
        if (skb == NULL)
                return -ENOMEM;