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[XFRM] netlink: Use nlmsg_end() and nlmsg_cancel()
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Thomas Graf authored and David S. Miller committed Oct 10, 2007
1 parent 79b8b7f commit 9825069
Showing 1 changed file with 26 additions and 49 deletions.
75 changes: 26 additions & 49 deletions net/xfrm/xfrm_user.c
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Original file line number Diff line number Diff line change
Expand Up @@ -583,7 +583,6 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
struct sk_buff *skb = sp->out_skb;
struct xfrm_usersa_info *p;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);

if (sp->this_idx < sp->start_idx)
goto out;
Expand Down Expand Up @@ -628,14 +627,14 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
if (x->lastused)
RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
nlmsg_end(skb, nlh);
out:
sp->this_idx++;
return 0;

rtattr_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
Expand Down Expand Up @@ -1270,7 +1269,6 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr
struct sk_buff *in_skb = sp->in_skb;
struct sk_buff *skb = sp->out_skb;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);

if (sp->this_idx < sp->start_idx)
goto out;
Expand All @@ -1289,14 +1287,14 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr
if (copy_to_user_policy_type(xp->type, skb) < 0)
goto nlmsg_failure;

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
nlmsg_end(skb, nlh);
out:
sp->this_idx++;
return 0;

nlmsg_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
Expand Down Expand Up @@ -1446,7 +1444,6 @@ static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_eve
struct xfrm_aevent_id *id;
struct nlmsghdr *nlh;
struct xfrm_lifetime_cur ltime;
unsigned char *b = skb_tail_pointer(skb);

nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
if (nlh == NULL)
Expand Down Expand Up @@ -1479,12 +1476,11 @@ static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_eve
RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
}

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
return nlmsg_end(skb, nlh);

rtattr_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Expand Down Expand Up @@ -1862,7 +1858,6 @@ static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
struct xfrm_migrate *mp;
struct xfrm_userpolicy_id *pol_id;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);
int i;

nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
Expand All @@ -1883,11 +1878,10 @@ static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
goto nlmsg_failure;
}

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
return nlmsg_end(skb, nlh);
nlmsg_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
Expand Down Expand Up @@ -2043,7 +2037,6 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_eve
{
struct xfrm_user_expire *ue;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);

nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
if (nlh == NULL)
Expand All @@ -2053,8 +2046,7 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_eve
copy_to_user_state(x, &ue->state);
ue->hard = (c->data.hard != 0) ? 1 : 0;

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
return nlmsg_end(skb, nlh);
}

static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
Expand Down Expand Up @@ -2096,13 +2088,11 @@ static int xfrm_notify_sa_flush(struct km_event *c)
struct xfrm_usersa_flush *p;
struct nlmsghdr *nlh;
struct sk_buff *skb;
sk_buff_data_t b;
int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));

skb = alloc_skb(len, GFP_ATOMIC);
if (skb == NULL)
return -ENOMEM;
b = skb->tail;

nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
if (nlh == NULL) {
Expand All @@ -2113,7 +2103,7 @@ static int xfrm_notify_sa_flush(struct km_event *c)
p = NLMSG_DATA(nlh);
p->proto = c->data.proto;

nlh->nlmsg_len = skb->tail - b;
nlmsg_end(skb, nlh);

NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Expand All @@ -2140,7 +2130,6 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
struct xfrm_usersa_id *id;
struct nlmsghdr *nlh;
struct sk_buff *skb;
sk_buff_data_t b;
int len = xfrm_sa_len(x);
int headlen;

Expand All @@ -2154,7 +2143,6 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
skb = alloc_skb(len, GFP_ATOMIC);
if (skb == NULL)
return -ENOMEM;
b = skb->tail;

nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
if (nlh == NULL)
Expand Down Expand Up @@ -2185,7 +2173,7 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
if (x->encap)
RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);

nlh->nlmsg_len = skb->tail - b;
nlmsg_end(skb, nlh);

NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Expand Down Expand Up @@ -2225,7 +2213,6 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
{
struct xfrm_user_acquire *ua;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);
__u32 seq = xfrm_get_acqseq();

nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
Expand All @@ -2249,12 +2236,11 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
if (copy_to_user_policy_type(xp->type, skb) < 0)
goto nlmsg_failure;

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
return nlmsg_end(skb, nlh);

nlmsg_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
Expand Down Expand Up @@ -2345,7 +2331,6 @@ static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
struct xfrm_user_polexpire *upe;
struct nlmsghdr *nlh;
int hard = c->data.hard;
unsigned char *b = skb_tail_pointer(skb);

nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
if (nlh == NULL)
Expand All @@ -2361,12 +2346,11 @@ static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
goto nlmsg_failure;
upe->hard = !!hard;

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
return nlmsg_end(skb, nlh);

nlmsg_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
Expand Down Expand Up @@ -2397,7 +2381,6 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *
struct xfrm_userpolicy_id *id;
struct nlmsghdr *nlh;
struct sk_buff *skb;
sk_buff_data_t b;
int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
int headlen;

Expand All @@ -2414,7 +2397,6 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *
skb = alloc_skb(len, GFP_ATOMIC);
if (skb == NULL)
return -ENOMEM;
b = skb->tail;

nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
if (nlh == NULL)
Expand All @@ -2439,7 +2421,7 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *
if (copy_to_user_policy_type(xp->type, skb) < 0)
goto nlmsg_failure;

nlh->nlmsg_len = skb->tail - b;
nlmsg_end(skb, nlh);

NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Expand All @@ -2454,7 +2436,6 @@ static int xfrm_notify_policy_flush(struct km_event *c)
{
struct nlmsghdr *nlh;
struct sk_buff *skb;
sk_buff_data_t b;
int len = 0;
#ifdef CONFIG_XFRM_SUB_POLICY
len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
Expand All @@ -2464,16 +2445,14 @@ static int xfrm_notify_policy_flush(struct km_event *c)
skb = alloc_skb(len, GFP_ATOMIC);
if (skb == NULL)
return -ENOMEM;
b = skb->tail;


nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
if (nlh == NULL)
goto nlmsg_failure;
if (copy_to_user_policy_type(c->data.type, skb) < 0)
goto nlmsg_failure;

nlh->nlmsg_len = skb->tail - b;
nlmsg_end(skb, nlh);

NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Expand Down Expand Up @@ -2508,7 +2487,6 @@ static int build_report(struct sk_buff *skb, u8 proto,
{
struct xfrm_user_report *ur;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);

nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
if (nlh == NULL)
Expand All @@ -2521,12 +2499,11 @@ static int build_report(struct sk_buff *skb, u8 proto,
if (addr)
RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
return nlmsg_end(skb, nlh);

rtattr_failure:
nlmsg_trim(skb, b);
return -1;
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
Expand Down

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