From 58d7d8f9b20ee6f883532b952f246e4289fe06eb Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Thu, 21 Mar 2013 07:45:28 +0000 Subject: decnet: Parse netlink attributes on our own decnet is the only subsystem left that is relying on the global netlink attribute buffer rta_buf. It's horrible design and we want to get rid of it. This converts all of decnet to do implicit attribute parsing. It also gets rid of the error prone struct dn_kern_rta. Yes, the fib_magic() stuff is not pretty. It's compiled tested but I need someone with appropriate hardware to test the patch since I don't have access to it. Cc: linux-decnet-user@lists.sourceforge.net Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/decnet/dn_table.c | 42 +++++++++++++++++++++++------------------- 1 file changed, 23 insertions(+), 19 deletions(-) (limited to 'net/decnet/dn_table.c') diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c index 6c2445b..fc42a0a 100644 --- a/net/decnet/dn_table.c +++ b/net/decnet/dn_table.c @@ -224,26 +224,27 @@ static struct dn_zone *dn_new_zone(struct dn_hash *table, int z) } -static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct dn_kern_rta *rta, struct dn_fib_info *fi) +static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct nlattr *attrs[], struct dn_fib_info *fi) { struct rtnexthop *nhp; int nhlen; - if (rta->rta_priority && *rta->rta_priority != fi->fib_priority) + if (attrs[RTA_PRIORITY] && + nla_get_u32(attrs[RTA_PRIORITY]) != fi->fib_priority) return 1; - if (rta->rta_oif || rta->rta_gw) { - if ((!rta->rta_oif || *rta->rta_oif == fi->fib_nh->nh_oif) && - (!rta->rta_gw || memcmp(rta->rta_gw, &fi->fib_nh->nh_gw, 2) == 0)) + if (attrs[RTA_OIF] || attrs[RTA_GATEWAY]) { + if ((!attrs[RTA_OIF] || nla_get_u32(attrs[RTA_OIF]) == fi->fib_nh->nh_oif) && + (!attrs[RTA_GATEWAY] || nla_get_le16(attrs[RTA_GATEWAY]) != fi->fib_nh->nh_gw)) return 0; return 1; } - if (rta->rta_mp == NULL) + if (!attrs[RTA_MULTIPATH]) return 0; - nhp = RTA_DATA(rta->rta_mp); - nhlen = RTA_PAYLOAD(rta->rta_mp); + nhp = nla_data(attrs[RTA_MULTIPATH]); + nhlen = nla_len(attrs[RTA_MULTIPATH]); for_nexthops(fi) { int attrlen = nhlen - sizeof(struct rtnexthop); @@ -254,7 +255,10 @@ static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct dn_kern if (nhp->rtnh_ifindex && nhp->rtnh_ifindex != nh->nh_oif) return 1; if (attrlen) { - gw = dn_fib_get_attr16(RTNH_DATA(nhp), attrlen, RTA_GATEWAY); + struct nlattr *gw_attr; + + gw_attr = nla_find((struct nlattr *) (nhp + 1), attrlen, RTA_GATEWAY); + gw = gw_attr ? nla_get_le16(gw_attr) : 0; if (gw && gw != nh->nh_gw) return 1; @@ -517,7 +521,8 @@ out: return skb->len; } -static int dn_fib_table_insert(struct dn_fib_table *tb, struct rtmsg *r, struct dn_kern_rta *rta, struct nlmsghdr *n, struct netlink_skb_parms *req) +static int dn_fib_table_insert(struct dn_fib_table *tb, struct rtmsg *r, struct nlattr *attrs[], + struct nlmsghdr *n, struct netlink_skb_parms *req) { struct dn_hash *table = (struct dn_hash *)tb->data; struct dn_fib_node *new_f, *f, **fp, **del_fp; @@ -536,15 +541,14 @@ static int dn_fib_table_insert(struct dn_fib_table *tb, struct rtmsg *r, struct return -ENOBUFS; dz_key_0(key); - if (rta->rta_dst) { - __le16 dst; - memcpy(&dst, rta->rta_dst, 2); + if (attrs[RTA_DST]) { + __le16 dst = nla_get_le16(attrs[RTA_DST]); if (dst & ~DZ_MASK(dz)) return -EINVAL; key = dz_key(dst, dz); } - if ((fi = dn_fib_create_info(r, rta, n, &err)) == NULL) + if ((fi = dn_fib_create_info(r, attrs, n, &err)) == NULL) return err; if (dz->dz_nent > (dz->dz_divisor << 2) && @@ -654,7 +658,8 @@ out: } -static int dn_fib_table_delete(struct dn_fib_table *tb, struct rtmsg *r, struct dn_kern_rta *rta, struct nlmsghdr *n, struct netlink_skb_parms *req) +static int dn_fib_table_delete(struct dn_fib_table *tb, struct rtmsg *r, struct nlattr *attrs[], + struct nlmsghdr *n, struct netlink_skb_parms *req) { struct dn_hash *table = (struct dn_hash*)tb->data; struct dn_fib_node **fp, **del_fp, *f; @@ -671,9 +676,8 @@ static int dn_fib_table_delete(struct dn_fib_table *tb, struct rtmsg *r, struct return -ESRCH; dz_key_0(key); - if (rta->rta_dst) { - __le16 dst; - memcpy(&dst, rta->rta_dst, 2); + if (attrs[RTA_DST]) { + __le16 dst = nla_get_le16(attrs[RTA_DST]); if (dst & ~DZ_MASK(dz)) return -EINVAL; key = dz_key(dst, dz); @@ -703,7 +707,7 @@ static int dn_fib_table_delete(struct dn_fib_table *tb, struct rtmsg *r, struct (r->rtm_scope == RT_SCOPE_NOWHERE || f->fn_scope == r->rtm_scope) && (!r->rtm_protocol || fi->fib_protocol == r->rtm_protocol) && - dn_fib_nh_match(r, n, rta, fi) == 0) + dn_fib_nh_match(r, n, attrs, fi) == 0) del_fp = fp; } -- cgit v1.1