netlink: Rename pid to portid to avoid confusion
It is a frequent mistake to confuse the netlink port identifier with a
process identifier. Try to reduce this confusion by renaming fields
that hold port identifiers portid instead of pid.
I have carefully avoided changing the structures exported to
userspace to avoid changing the userspace API.
I have successfully built an allyesconfig kernel with this change.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index a08b4ab..a18d975 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1185,7 +1185,7 @@
}
static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
- u32 pid, u32 seq, u16 flags, int event)
+ u32 portid, u32 seq, u16 flags, int event)
{
struct tcmsg *tcm;
struct nlmsghdr *nlh;
@@ -1193,7 +1193,7 @@
struct gnet_dump d;
struct qdisc_size_table *stab;
- nlh = nlmsg_put(skb, pid, seq, event, sizeof(*tcm), flags);
+ nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
if (!nlh)
goto out_nlmsg_trim;
tcm = nlmsg_data(nlh);
@@ -1248,25 +1248,25 @@
struct Qdisc *old, struct Qdisc *new)
{
struct sk_buff *skb;
- u32 pid = oskb ? NETLINK_CB(oskb).pid : 0;
+ u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb)
return -ENOBUFS;
if (old && !tc_qdisc_dump_ignore(old)) {
- if (tc_fill_qdisc(skb, old, clid, pid, n->nlmsg_seq,
+ if (tc_fill_qdisc(skb, old, clid, portid, n->nlmsg_seq,
0, RTM_DELQDISC) < 0)
goto err_out;
}
if (new && !tc_qdisc_dump_ignore(new)) {
- if (tc_fill_qdisc(skb, new, clid, pid, n->nlmsg_seq,
+ if (tc_fill_qdisc(skb, new, clid, portid, n->nlmsg_seq,
old ? NLM_F_REPLACE : 0, RTM_NEWQDISC) < 0)
goto err_out;
}
if (skb->len)
- return rtnetlink_send(skb, net, pid, RTNLGRP_TC,
+ return rtnetlink_send(skb, net, portid, RTNLGRP_TC,
n->nlmsg_flags & NLM_F_ECHO);
err_out:
@@ -1289,7 +1289,7 @@
q_idx++;
} else {
if (!tc_qdisc_dump_ignore(q) &&
- tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid,
+ tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
goto done;
q_idx++;
@@ -1300,7 +1300,7 @@
continue;
}
if (!tc_qdisc_dump_ignore(q) &&
- tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid,
+ tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
goto done;
q_idx++;
@@ -1375,7 +1375,7 @@
const struct Qdisc_class_ops *cops;
unsigned long cl = 0;
unsigned long new_cl;
- u32 pid = tcm->tcm_parent;
+ u32 portid = tcm->tcm_parent;
u32 clid = tcm->tcm_handle;
u32 qid = TC_H_MAJ(clid);
int err;
@@ -1403,8 +1403,8 @@
/* Step 1. Determine qdisc handle X:0 */
- if (pid != TC_H_ROOT) {
- u32 qid1 = TC_H_MAJ(pid);
+ if (portid != TC_H_ROOT) {
+ u32 qid1 = TC_H_MAJ(portid);
if (qid && qid1) {
/* If both majors are known, they must be identical. */
@@ -1418,10 +1418,10 @@
/* Now qid is genuine qdisc handle consistent
* both with parent and child.
*
- * TC_H_MAJ(pid) still may be unspecified, complete it now.
+ * TC_H_MAJ(portid) still may be unspecified, complete it now.
*/
- if (pid)
- pid = TC_H_MAKE(qid, pid);
+ if (portid)
+ portid = TC_H_MAKE(qid, portid);
} else {
if (qid == 0)
qid = dev->qdisc->handle;
@@ -1439,7 +1439,7 @@
/* Now try to get class */
if (clid == 0) {
- if (pid == TC_H_ROOT)
+ if (portid == TC_H_ROOT)
clid = qid;
} else
clid = TC_H_MAKE(qid, clid);
@@ -1478,7 +1478,7 @@
new_cl = cl;
err = -EOPNOTSUPP;
if (cops->change)
- err = cops->change(q, clid, pid, tca, &new_cl);
+ err = cops->change(q, clid, portid, tca, &new_cl);
if (err == 0)
tclass_notify(net, skb, n, q, new_cl, RTM_NEWTCLASS);
@@ -1492,7 +1492,7 @@
static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q,
unsigned long cl,
- u32 pid, u32 seq, u16 flags, int event)
+ u32 portid, u32 seq, u16 flags, int event)
{
struct tcmsg *tcm;
struct nlmsghdr *nlh;
@@ -1500,7 +1500,7 @@
struct gnet_dump d;
const struct Qdisc_class_ops *cl_ops = q->ops->cl_ops;
- nlh = nlmsg_put(skb, pid, seq, event, sizeof(*tcm), flags);
+ nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
if (!nlh)
goto out_nlmsg_trim;
tcm = nlmsg_data(nlh);
@@ -1540,18 +1540,18 @@
unsigned long cl, int event)
{
struct sk_buff *skb;
- u32 pid = oskb ? NETLINK_CB(oskb).pid : 0;
+ u32 portid = oskb ? NETLINK_CB(oskb).portid : 0;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb)
return -ENOBUFS;
- if (tc_fill_tclass(skb, q, cl, pid, n->nlmsg_seq, 0, event) < 0) {
+ if (tc_fill_tclass(skb, q, cl, portid, n->nlmsg_seq, 0, event) < 0) {
kfree_skb(skb);
return -EINVAL;
}
- return rtnetlink_send(skb, net, pid, RTNLGRP_TC,
+ return rtnetlink_send(skb, net, portid, RTNLGRP_TC,
n->nlmsg_flags & NLM_F_ECHO);
}
@@ -1565,7 +1565,7 @@
{
struct qdisc_dump_args *a = (struct qdisc_dump_args *)arg;
- return tc_fill_tclass(a->skb, q, cl, NETLINK_CB(a->cb->skb).pid,
+ return tc_fill_tclass(a->skb, q, cl, NETLINK_CB(a->cb->skb).portid,
a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTCLASS);
}