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-rw-r--r--net/sched/act_api.c71
1 files changed, 39 insertions, 32 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 2fe0345..ea80f82 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -18,6 +18,7 @@
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/kmod.h>
+#include <linux/err.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/sch_generic.h>
@@ -463,15 +464,16 @@ errout:
}
struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est,
- char *name, int ovr, int bind, int *err)
+ char *name, int ovr, int bind)
{
struct tc_action *a;
struct tc_action_ops *a_o;
char act_name[IFNAMSIZ];
struct nlattr *tb[TCA_ACT_MAX+1];
struct nlattr *kind;
+ int err;
- *err = -EINVAL;
+ err = -EINVAL;
if (name == NULL) {
if (nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL) < 0)
@@ -502,36 +504,35 @@ struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est,
* indicate this using -EAGAIN.
*/
if (a_o != NULL) {
- *err = -EAGAIN;
+ err = -EAGAIN;
goto err_mod;
}
#endif
- *err = -ENOENT;
+ err = -ENOENT;
goto err_out;
}
- *err = -ENOMEM;
+ err = -ENOMEM;
a = kzalloc(sizeof(*a), GFP_KERNEL);
if (a == NULL)
goto err_mod;
/* backward compatibility for policer */
if (name == NULL)
- *err = a_o->init(tb[TCA_ACT_OPTIONS], est, a, ovr, bind);
+ err = a_o->init(tb[TCA_ACT_OPTIONS], est, a, ovr, bind);
else
- *err = a_o->init(nla, est, a, ovr, bind);
- if (*err < 0)
+ err = a_o->init(nla, est, a, ovr, bind);
+ if (err < 0)
goto err_free;
/* module count goes up only when brand new policy is created
if it exists and is only bound to in a_o->init() then
ACT_P_CREATED is not returned (a zero is).
*/
- if (*err != ACT_P_CREATED)
+ if (err != ACT_P_CREATED)
module_put(a_o->owner);
a->ops = a_o;
- *err = 0;
return a;
err_free:
@@ -539,24 +540,22 @@ err_free:
err_mod:
module_put(a_o->owner);
err_out:
- return NULL;
+ return ERR_PTR(err);
}
struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est,
- char *name, int ovr, int bind, int *err)
+ char *name, int ovr, int bind)
{
struct nlattr *tb[TCA_ACT_MAX_PRIO+1];
struct tc_action *head = NULL, *act, *act_prev = NULL;
int i;
- if (nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL) < 0) {
- *err = -EINVAL;
- return head;
- }
+ if (nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL) < 0)
+ return ERR_PTR(-EINVAL);
for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
- act = tcf_action_init_1(tb[i], est, name, ovr, bind, err);
- if (act == NULL)
+ act = tcf_action_init_1(tb[i], est, name, ovr, bind);
+ if (IS_ERR(act))
goto err;
act->order = i;
@@ -571,7 +570,7 @@ struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est,
err:
if (head != NULL)
tcf_action_destroy(head, bind);
- return NULL;
+ return act;
}
int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
@@ -668,44 +667,46 @@ act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event)
}
static struct tc_action *
-tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int *err)
+tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 pid)
{
struct nlattr *tb[TCA_ACT_MAX+1];
struct tc_action *a;
int index;
+ int err;
- *err = -EINVAL;
+ err = -EINVAL;
if (nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL) < 0)
- return NULL;
+ goto err_out;
if (tb[TCA_ACT_INDEX] == NULL ||
nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
- return NULL;
+ goto err_out;
index = *(int *)nla_data(tb[TCA_ACT_INDEX]);
- *err = -ENOMEM;
+ err = -ENOMEM;
a = kzalloc(sizeof(struct tc_action), GFP_KERNEL);
if (a == NULL)
- return NULL;
+ goto err_out;
- *err = -EINVAL;
+ err = -EINVAL;
a->ops = tc_lookup_action(tb[TCA_ACT_KIND]);
if (a->ops == NULL)
goto err_free;
if (a->ops->lookup == NULL)
goto err_mod;
- *err = -ENOENT;
+ err = -ENOENT;
if (a->ops->lookup(a, index) == 0)
goto err_mod;
module_put(a->ops->owner);
- *err = 0;
return a;
+
err_mod:
module_put(a->ops->owner);
err_free:
kfree(a);
- return NULL;
+err_out:
+ return ERR_PTR(err);
}
static void cleanup_a(struct tc_action *act)
@@ -816,9 +817,11 @@ tca_action_gd(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int event)
}
for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
- act = tcf_action_get_1(tb[i], n, pid, &ret);
- if (act == NULL)
+ act = tcf_action_get_1(tb[i], n, pid);
+ if (IS_ERR(act)) {
+ ret = PTR_ERR(act);
goto err;
+ }
act->order = i;
if (head == NULL)
@@ -912,9 +915,13 @@ tcf_action_add(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int ovr)
struct tc_action *a;
u32 seq = n->nlmsg_seq;
- act = tcf_action_init(nla, NULL, NULL, ovr, 0, &ret);
+ act = tcf_action_init(nla, NULL, NULL, ovr, 0);
if (act == NULL)
goto done;
+ if (IS_ERR(act)) {
+ ret = PTR_ERR(act);
+ goto done;
+ }
/* dump then free all the actions after update; inserted policy
* stays intact
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