[NETLINK]: Remove error pointer from netlink message handler

The error pointer argument in netlink message handlers is used
to signal the special case where processing has to be interrupted
because a dump was started but no error happened. Instead it is
simpler and more clear to return -EINTR and have netlink_run_queue()
deal with getting the queue right.

nfnetlink passed on this error pointer to its subsystem handlers
but only uses it to signal the start of a netlink dump. Therefore
it can be removed there as well.

This patch also cleans up the error handling in the affected
message handlers to be consistent since it had to be touched anyway.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
index e1ea5dfbbbd44550656641c79eb214d932d06407..0f9311df1559a212d7b2cd7b73e781e93190ccbc 100644 (file)
--- a/include/linux/netfilter/nfnetlink.h
+++ b/include/linux/netfilter/nfnetlink.h
@@ -111,7 +111,7 @@ struct nfgenmsg {
 struct nfnl_callback
 {
        int (*call)(struct sock *nl, struct sk_buff *skb, 
-               struct nlmsghdr *nlh, struct nfattr *cda[], int *errp);
+               struct nlmsghdr *nlh, struct nfattr *cda[]);
        u_int16_t attr_count;   /* number of nfattr's */
 };
 

diff --git a/include/net/netlink.h b/include/net/netlink.h
index 510ca7fabe18e9ba7a17c5aa68b1b63d2ae281fd..1c11518fc8228fc6a30f24789eee8b80530e3d85 100644 (file)
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -214,7 +214,7 @@ struct nl_info {
 
 extern void            netlink_run_queue(struct sock *sk, unsigned int *qlen,
                                          int (*cb)(struct sk_buff *,
-                                                   struct nlmsghdr *, int *));
+                                                   struct nlmsghdr *));
 extern void            netlink_queue_skip(struct nlmsghdr *nlh,
                                           struct sk_buff *skb);
 extern int             nlmsg_notify(struct sock *sk, struct sk_buff *skb,

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index b2136accd267ac420a255a36d5c84601e31b26dc..14241ada41a10f852af01487013355ea20af48c4 100644 (file)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -852,8 +852,7 @@ static int rtattr_max;
 
 /* Process one rtnetlink message. */
 
-static __inline__ int
-rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
+static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
        rtnl_doit_func doit;
        int sz_idx, kind;
@@ -863,10 +862,8 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
        int err;
 
        type = nlh->nlmsg_type;
-
-       /* Unknown message: reply with EINVAL */
        if (type > RTM_MAX)
-               goto err_inval;
+               return -EINVAL;
 
        type -= RTM_BASE;
 
@@ -875,40 +872,33 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
                return 0;
 
        family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
-       if (family >= NPROTO) {
-               *errp = -EAFNOSUPPORT;
-               return -1;
-       }
+       if (family >= NPROTO)
+               return -EAFNOSUPPORT;
 
        sz_idx = type>>2;
        kind = type&3;
 
-       if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) {
-               *errp = -EPERM;
-               return -1;
-       }
+       if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
+               return -EPERM;
 
        if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
                rtnl_dumpit_func dumpit;
 
                dumpit = rtnl_get_dumpit(family, type);
                if (dumpit == NULL)
-                       goto err_inval;
-
-               if ((*errp = netlink_dump_start(rtnl, skb, nlh,
-                                               dumpit, NULL)) != 0) {
-                       return -1;
-               }
+                       return -EINVAL;
 
-               netlink_queue_skip(nlh, skb);
-               return -1;
+               err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
+               if (err == 0)
+                       err = -EINTR;
+               return err;
        }
 
        memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
 
        min_len = rtm_min[sz_idx];
        if (nlh->nlmsg_len < min_len)
-               goto err_inval;
+               return -EINVAL;
 
        if (nlh->nlmsg_len > min_len) {
                int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
@@ -918,7 +908,7 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
                        unsigned flavor = attr->rta_type;
                        if (flavor) {
                                if (flavor > rta_max[sz_idx])
-                                       goto err_inval;
+                                       return -EINVAL;
                                rta_buf[flavor-1] = attr;
                        }
                        attr = RTA_NEXT(attr, attrlen);
@@ -927,15 +917,9 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
 
        doit = rtnl_get_doit(family, type);
        if (doit == NULL)
-               goto err_inval;
-       err = doit(skb, nlh, (void *)&rta_buf[0]);
-
-       *errp = err;
-       return err;
+               return -EINVAL;
 
-err_inval:
-       *errp = -EINVAL;
-       return -1;
+       return doit(skb, nlh, (void *)&rta_buf[0]);
 }
 
 static void rtnetlink_rcv(struct sock *sk, int len)

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 76f11f3259198e4abc5ee83cebd4c8777ddd1dca..443ba7753a333ac2eb06f410bc9c79bc8572c78a 100644 (file)
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -661,7 +661,7 @@ static const size_t cta_min[CTA_MAX] = {
 
 static int
 ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
-                       struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+                       struct nlmsghdr *nlh, struct nfattr *cda[])
 {
        struct nf_conntrack_tuple_hash *h;
        struct nf_conntrack_tuple tuple;
@@ -709,7 +709,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
 
 static int
 ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
-                       struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+                       struct nlmsghdr *nlh, struct nfattr *cda[])
 {
        struct nf_conntrack_tuple_hash *h;
        struct nf_conntrack_tuple tuple;
@@ -720,22 +720,15 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
        int err = 0;
 
        if (nlh->nlmsg_flags & NLM_F_DUMP) {
-               u32 rlen;
-
 #ifndef CONFIG_NF_CT_ACCT
                if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO)
                        return -ENOTSUPP;
 #endif
-               if ((*errp = netlink_dump_start(ctnl, skb, nlh,
-                                               ctnetlink_dump_table,
-                                               ctnetlink_done)) != 0)
-                       return -EINVAL;
-
-               rlen = NLMSG_ALIGN(nlh->nlmsg_len);
-               if (rlen > skb->len)
-                       rlen = skb->len;
-               skb_pull(skb, rlen);
-               return 0;
+               err = netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table,
+                                        ctnetlink_done);
+               if (err == 0)
+                       err = -EINTR;
+               return err;
        }
 
        if (nfattr_bad_size(cda, CTA_MAX, cta_min))
@@ -1009,7 +1002,7 @@ err:
 
 static int
 ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
-                       struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+                       struct nlmsghdr *nlh, struct nfattr *cda[])
 {
        struct nf_conntrack_tuple otuple, rtuple;
        struct nf_conntrack_tuple_hash *h = NULL;
@@ -1260,7 +1253,7 @@ static const size_t cta_min_exp[CTA_EXPECT_MAX] = {
 
 static int
 ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
-                    struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+                    struct nlmsghdr *nlh, struct nfattr *cda[])
 {
        struct nf_conntrack_tuple tuple;
        struct nf_conntrack_expect *exp;
@@ -1273,17 +1266,12 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
                return -EINVAL;
 
        if (nlh->nlmsg_flags & NLM_F_DUMP) {
-               u32 rlen;
-
-               if ((*errp = netlink_dump_start(ctnl, skb, nlh,
-                                               ctnetlink_exp_dump_table,
-                                               ctnetlink_done)) != 0)
-                       return -EINVAL;
-               rlen = NLMSG_ALIGN(nlh->nlmsg_len);
-               if (rlen > skb->len)
-                       rlen = skb->len;
-               skb_pull(skb, rlen);
-               return 0;
+               err = netlink_dump_start(ctnl, skb, nlh,
+                                        ctnetlink_exp_dump_table,
+                                        ctnetlink_done);
+               if (err == 0)
+                       err = -EINTR;
+               return err;
        }
 
        if (cda[CTA_EXPECT_MASTER-1])
@@ -1330,7 +1318,7 @@ out:
 
 static int
 ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
-                    struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+                    struct nlmsghdr *nlh, struct nfattr *cda[])
 {
        struct nf_conntrack_expect *exp, *tmp;
        struct nf_conntrack_tuple tuple;
@@ -1464,7 +1452,7 @@ out:
 
 static int
 ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
-                    struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+                    struct nlmsghdr *nlh, struct nfattr *cda[])
 {
        struct nf_conntrack_tuple tuple;
        struct nf_conntrack_expect *exp;

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index dec36abdf949e43da31c3ff540e0cb1881a452cb..c37ed0156b07d06a5b874baa8244a1bd6ff73592 100644 (file)
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -195,17 +195,14 @@ int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags)
 EXPORT_SYMBOL_GPL(nfnetlink_unicast);
 
 /* Process one complete nfnetlink message. */
-static int nfnetlink_rcv_msg(struct sk_buff *skb,
-                                   struct nlmsghdr *nlh, int *errp)
+static int nfnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
        struct nfnl_callback *nc;
        struct nfnetlink_subsystem *ss;
-       int type, err = 0;
+       int type, err;
 
-       if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
-               *errp = -EPERM;
-               return -1;
-       }
+       if (security_netlink_recv(skb, CAP_NET_ADMIN))
+               return -EPERM;
 
        /* Only requests are handled by kernel now. */
        if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
@@ -227,12 +224,12 @@ static int nfnetlink_rcv_msg(struct sk_buff *skb,
                ss = nfnetlink_get_subsys(type);
                if (!ss)
 #endif
-                       goto err_inval;
+                       return -EINVAL;
        }
 
        nc = nfnetlink_find_client(type, ss);
        if (!nc)
-               goto err_inval;
+               return -EINVAL;
 
        {
                u_int16_t attr_count =
@@ -243,16 +240,9 @@ static int nfnetlink_rcv_msg(struct sk_buff *skb,
 
                err = nfnetlink_check_attributes(ss, nlh, cda);
                if (err < 0)
-                       goto err_inval;
-
-               err = nc->call(nfnl, skb, nlh, cda, errp);
-               *errp = err;
-               return err;
+                       return err;
+               return nc->call(nfnl, skb, nlh, cda);
        }
-
-err_inval:
-       *errp = -EINVAL;
-       return -1;
 }
 
 static void nfnetlink_rcv(struct sock *sk, int len)

diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 9709f94787f824d029f4c1123a7de787cc4b16b4..b174aadd73e6f2d2c5bb2022c1a10a8de8ff8b90 100644 (file)
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -759,7 +759,7 @@ static struct notifier_block nfulnl_rtnl_notifier = {
 
 static int
 nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
-                 struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+                 struct nlmsghdr *nlh, struct nfattr *nfqa[])
 {
        return -ENOTSUPP;
 }
@@ -797,7 +797,7 @@ static const int nfula_cfg_min[NFULA_CFG_MAX] = {
 
 static int
 nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
-                  struct nlmsghdr *nlh, struct nfattr *nfula[], int *errp)
+                  struct nlmsghdr *nlh, struct nfattr *nfula[])
 {
        struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
        u_int16_t group_num = ntohs(nfmsg->res_id);

diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index b6585caa431e12c65e3bab7c611fc7cbab9bc708..9aefb1c9bfa38613753d8e10dd657a299becda73 100644 (file)
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -783,7 +783,7 @@ static const int nfqa_verdict_min[NFQA_MAX] = {
 
 static int
 nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
-                  struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+                  struct nlmsghdr *nlh, struct nfattr *nfqa[])
 {
        struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
        u_int16_t queue_num = ntohs(nfmsg->res_id);
@@ -848,7 +848,7 @@ err_out_put:
 
 static int
 nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
-                 struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+                 struct nlmsghdr *nlh, struct nfattr *nfqa[])
 {
        return -ENOTSUPP;
 }
@@ -865,7 +865,7 @@ static struct nf_queue_handler nfqh = {
 
 static int
 nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
-                 struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+                 struct nlmsghdr *nlh, struct nfattr *nfqa[])
 {
        struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
        u_int16_t queue_num = ntohs(nfmsg->res_id);

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 5d1079b1838c3880e8b3f6904bc14e86a433f840..1823b7c6315634ad9e2701652e81a0bf973d96c8 100644 (file)
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1463,7 +1463,7 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
 }
 
 static int netlink_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
-                                                    struct nlmsghdr *, int *))
+                                                    struct nlmsghdr *))
 {
        struct nlmsghdr *nlh;
        int err;
@@ -1483,13 +1483,11 @@ static int netlink_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
                if (nlh->nlmsg_type < NLMSG_MIN_TYPE)
                        goto skip;
 
-               if (cb(skb, nlh, &err) < 0) {
-                       /* Not an error, but we have to interrupt processing
-                        * here. Note: that in this case we do not pull
-                        * message from skb, it will be processed later.
-                        */
-                       if (err == 0)
-                               return -1;
+               err = cb(skb, nlh);
+               if (err == -EINTR) {
+                       /* Not an error, but we interrupt processing */
+                       netlink_queue_skip(nlh, skb);
+                       return err;
                }
 skip:
                if (nlh->nlmsg_flags & NLM_F_ACK || err)
@@ -1515,9 +1513,14 @@ skip:
  *
  * qlen must be initialized to 0 before the initial entry, afterwards
  * the function may be called repeatedly until qlen reaches 0.
+ *
+ * The callback function may return -EINTR to signal that processing
+ * of netlink messages shall be interrupted. In this case the message
+ * currently being processed will NOT be requeued onto the receive
+ * queue.
  */
 void netlink_run_queue(struct sock *sk, unsigned int *qlen,
-                      int (*cb)(struct sk_buff *, struct nlmsghdr *, int *))
+                      int (*cb)(struct sk_buff *, struct nlmsghdr *))
 {
        struct sk_buff *skb;
 

diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 95391e609046841eb88e2b16df193594d4b1d09a..1b897bc92e61c4be37210dd3f382d8d4685677e8 100644 (file)
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -295,60 +295,49 @@ int genl_unregister_family(struct genl_family *family)
        return -ENOENT;
 }
 
-static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
-                              int *errp)
+static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
        struct genl_ops *ops;
        struct genl_family *family;
        struct genl_info info;
        struct genlmsghdr *hdr = nlmsg_data(nlh);
-       int hdrlen, err = -EINVAL;
+       int hdrlen, err;
 
        family = genl_family_find_byid(nlh->nlmsg_type);
-       if (family == NULL) {
-               err = -ENOENT;
-               goto errout;
-       }
+       if (family == NULL)
+               return -ENOENT;
 
        hdrlen = GENL_HDRLEN + family->hdrsize;
        if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen))
-               goto errout;
+               return -EINVAL;
 
        ops = genl_get_cmd(hdr->cmd, family);
-       if (ops == NULL) {
-               err = -EOPNOTSUPP;
-               goto errout;
-       }
+       if (ops == NULL)
+               return -EOPNOTSUPP;
 
-       if ((ops->flags & GENL_ADMIN_PERM) && security_netlink_recv(skb, CAP_NET_ADMIN)) {
-               err = -EPERM;
-               goto errout;
-       }
+       if ((ops->flags & GENL_ADMIN_PERM) &&
+           security_netlink_recv(skb, CAP_NET_ADMIN))
+               return -EPERM;
 
        if (nlh->nlmsg_flags & NLM_F_DUMP) {
-               if (ops->dumpit == NULL) {
-                       err = -EOPNOTSUPP;
-                       goto errout;
-               }
+               if (ops->dumpit == NULL)
+                       return -EOPNOTSUPP;
 
-               *errp = err = netlink_dump_start(genl_sock, skb, nlh,
-                                                ops->dumpit, ops->done);
+               err = netlink_dump_start(genl_sock, skb, nlh,
+                                        ops->dumpit, ops->done);
                if (err == 0)
-                       skb_pull(skb, min(NLMSG_ALIGN(nlh->nlmsg_len),
-                                         skb->len));
-               return -1;
+                       err = -EINTR;
+               return err;
        }
 
-       if (ops->doit == NULL) {
-               err = -EOPNOTSUPP;
-               goto errout;
-       }
+       if (ops->doit == NULL)
+               return -EOPNOTSUPP;
 
        if (family->attrbuf) {
                err = nlmsg_parse(nlh, hdrlen, family->attrbuf, family->maxattr,
                                  ops->policy);
                if (err < 0)
-                       goto errout;
+                       return err;
        }
 
        info.snd_seq = nlh->nlmsg_seq;
@@ -358,12 +347,7 @@ static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
        info.userhdr = nlmsg_data(nlh) + GENL_HDRLEN;
        info.attrs = family->attrbuf;
 
-       *errp = err = ops->doit(skb, &info);
-       return err;
-
-errout:
-       *errp = err;
-       return -1;
+       return ops->doit(skb, &info);
 }
 
 static void genl_rcv(struct sock *sk, int len)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 4d2f2094e6dff787c202742cd152faa4c983a39f..5e52d6275badda6075b2642f2774dc90b30801ee 100644 (file)
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1852,46 +1852,39 @@ static struct xfrm_link {
        [XFRM_MSG_MIGRATE     - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate    },
 };
 
-static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
+static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
        struct rtattr *xfrma[XFRMA_MAX];
        struct xfrm_link *link;
-       int type, min_len;
+       int type, min_len, err;
 
        type = nlh->nlmsg_type;
-
-       /* Unknown message: reply with EINVAL */
        if (type > XFRM_MSG_MAX)
-               goto err_einval;
+               return -EINVAL;
 
        type -= XFRM_MSG_BASE;
        link = &xfrm_dispatch[type];
 
        /* All operations require privileges, even GET */
-       if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
-               *errp = -EPERM;
-               return -1;
-       }
+       if (security_netlink_recv(skb, CAP_NET_ADMIN))
+               return -EPERM;
 
        if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
             type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
            (nlh->nlmsg_flags & NLM_F_DUMP)) {
                if (link->dump == NULL)
-                       goto err_einval;
-
-               if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh,
-                                               link->dump, NULL)) != 0) {
-                       return -1;
-               }
+                       return -EINVAL;
 
-               netlink_queue_skip(nlh, skb);
-               return -1;
+               err = netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
+               if (err == 0)
+                       err = -EINTR;
+               return err;
        }
 
        memset(xfrma, 0, sizeof(xfrma));
 
        if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
-               goto err_einval;
+               return -EINVAL;
 
        if (nlh->nlmsg_len > min_len) {
                int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
@@ -1901,7 +1894,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *err
                        unsigned short flavor = attr->rta_type;
                        if (flavor) {
                                if (flavor > XFRMA_MAX)
-                                       goto err_einval;
+                                       return -EINVAL;
                                xfrma[flavor - 1] = attr;
                        }
                        attr = RTA_NEXT(attr, attrlen);
@@ -1909,14 +1902,9 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *err
        }
 
        if (link->doit == NULL)
-               goto err_einval;
-       *errp = link->doit(skb, nlh, xfrma);
-
-       return *errp;
+               return -EINVAL;
 
-err_einval:
-       *errp = -EINVAL;
-       return -1;
+       return link->doit(skb, nlh, xfrma);
 }
 
 static void xfrm_netlink_rcv(struct sock *sk, int len)