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net sched: Pass the skb into change so it can access NETLINK_CB 

cls_flow.c plays with uids and gids.  Unless I misread that
code it is possible for classifiers to depend on the specific uid and
gid values.  Therefore I need to know the user namespace of the
netlink socket that is installing the packet classifiers.  Pass
in the rtnetlink skb so I can access the NETLINK_CB of the passed
packet.  In particular I want access to sk_user_ns(NETLINK_CB(in_skb).ssk).

Pass in not the user namespace but the incomming rtnetlink skb into
the the classifier change routines as that is generally the more useful
parameter.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-05-25 13:42:45 -06:00
parent 9eea9515cb
commit af4c6641f5
10 changed files with 19 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/sch_generic.h
View File

@ -188,7 +188,8 @@ struct tcf_proto_ops {
unsigned long (*get)(struct tcf_proto*, u32 handle);
void (*put)(struct tcf_proto*, unsigned long);
int (*change)(struct tcf_proto*, unsigned long,
int (*change)(struct sk_buff *,
struct tcf_proto*, unsigned long,
u32 handle, struct nlattr **,
unsigned long *);
int (*delete)(struct tcf_proto*, unsigned long);

2
net/sched/cls_api.c
View File

@ -319,7 +319,7 @@ replay:
}
}
err = tp->ops->change(tp, cl, t->tcm_handle, tca, &fh);
err = tp->ops->change(skb, tp, cl, t->tcm_handle, tca, &fh);
if (err == 0) {
if (tp_created) {
spin_lock_bh(root_lock);

3
net/sched/cls_basic.c
View File

@ -162,7 +162,8 @@ errout:
return err;
}
static int basic_change(struct tcf_proto *tp, unsigned long base, u32 handle,
static int basic_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base, u32 handle,
struct nlattr **tca, unsigned long *arg)
{
int err;

3
net/sched/cls_cgroup.c
View File

@ -151,7 +151,8 @@ static const struct nla_policy cgroup_policy[TCA_CGROUP_MAX + 1] = {
[TCA_CGROUP_EMATCHES] = { .type = NLA_NESTED },
};
static int cls_cgroup_change(struct tcf_proto *tp, unsigned long base,
static int cls_cgroup_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle, struct nlattr **tca,
unsigned long *arg)
{

3
net/sched/cls_flow.c
View File

@ -347,7 +347,8 @@ static const struct nla_policy flow_policy[TCA_FLOW_MAX + 1] = {
[TCA_FLOW_PERTURB] = { .type = NLA_U32 },
};
static int flow_change(struct tcf_proto *tp, unsigned long base,
static int flow_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle, struct nlattr **tca,
unsigned long *arg)
{

3
net/sched/cls_fw.c
View File

@ -233,7 +233,8 @@ errout:
return err;
}
static int fw_change(struct tcf_proto *tp, unsigned long base,
static int fw_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle,
struct nlattr **tca,
unsigned long *arg)

3
net/sched/cls_route.c
View File

@ -427,7 +427,8 @@ errout:
return err;
}
static int route4_change(struct tcf_proto *tp, unsigned long base,
static int route4_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle,
struct nlattr **tca,
unsigned long *arg)

3
net/sched/cls_rsvp.h
View File

@ -416,7 +416,8 @@ static const struct nla_policy rsvp_policy[TCA_RSVP_MAX + 1] = {
[TCA_RSVP_PINFO] = { .len = sizeof(struct tc_rsvp_pinfo) },
};
static int rsvp_change(struct tcf_proto *tp, unsigned long base,
static int rsvp_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle,
struct nlattr **tca,
unsigned long *arg)

3
net/sched/cls_tcindex.c
View File

@ -332,7 +332,8 @@ errout:
}
static int
tcindex_change(struct tcf_proto *tp, unsigned long base, u32 handle,
tcindex_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base, u32 handle,
struct nlattr **tca, unsigned long *arg)
{
struct nlattr *opt = tca[TCA_OPTIONS];

3
net/sched/cls_u32.c
View File

@ -544,7 +544,8 @@ errout:
return err;
}
static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
static int u32_change(struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base, u32 handle,
struct nlattr **tca,
unsigned long *arg)
{