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authorSasha Levin <sasha.levin@oracle.com>2013-02-27 17:06:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-27 19:10:24 -0800
commitb67bfe0d42cac56c512dd5da4b1b347a23f4b70a (patch)
tree3d465aea12b97683f26ffa38eba8744469de9997 /net/netlink
parent1e142b29e210b5dfb2deeb6ce2210b60af16d2a6 (diff)
downloadlinux-b67bfe0d42cac56c512dd5da4b1b347a23f4b70a.tar.gz
hlist: drop the node parameter from iterators
I'm not sure why, but the hlist for each entry iterators were conceived list_for_each_entry(pos, head, member) The hlist ones were greedy and wanted an extra parameter: hlist_for_each_entry(tpos, pos, head, member) Why did they need an extra pos parameter? I'm not quite sure. Not only they don't really need it, it also prevents the iterator from looking exactly like the list iterator, which is unfortunate. Besides the semantic patch, there was some manual work required: - Fix up the actual hlist iterators in linux/list.h - Fix up the declaration of other iterators based on the hlist ones. - A very small amount of places were using the 'node' parameter, this was modified to use 'obj->member' instead. - Coccinelle didn't handle the hlist_for_each_entry_safe iterator properly, so those had to be fixed up manually. The semantic patch which is mostly the work of Peter Senna Tschudin is here: @@ iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host; type T; expression a,c,d,e; identifier b; statement S; @@ -T b; <+... when != b ( hlist_for_each_entry(a, - b, c, d) S | hlist_for_each_entry_continue(a, - b, c) S | hlist_for_each_entry_from(a, - b, c) S | hlist_for_each_entry_rcu(a, - b, c, d) S | hlist_for_each_entry_rcu_bh(a, - b, c, d) S | hlist_for_each_entry_continue_rcu_bh(a, - b, c) S | for_each_busy_worker(a, c, - b, d) S | ax25_uid_for_each(a, - b, c) S | ax25_for_each(a, - b, c) S | inet_bind_bucket_for_each(a, - b, c) S | sctp_for_each_hentry(a, - b, c) S | sk_for_each(a, - b, c) S | sk_for_each_rcu(a, - b, c) S | sk_for_each_from -(a, b) +(a) S + sk_for_each_from(a) S | sk_for_each_safe(a, - b, c, d) S | sk_for_each_bound(a, - b, c) S | hlist_for_each_entry_safe(a, - b, c, d, e) S | hlist_for_each_entry_continue_rcu(a, - b, c) S | nr_neigh_for_each(a, - b, c) S | nr_neigh_for_each_safe(a, - b, c, d) S | nr_node_for_each(a, - b, c) S | nr_node_for_each_safe(a, - b, c, d) S | - for_each_gfn_sp(a, c, d, b) S + for_each_gfn_sp(a, c, d) S | - for_each_gfn_indirect_valid_sp(a, c, d, b) S + for_each_gfn_indirect_valid_sp(a, c, d) S | for_each_host(a, - b, c) S | for_each_host_safe(a, - b, c, d) S | for_each_mesh_entry(a, - b, c, d) S ) ...+> [akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c] [akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c] [akpm@linux-foundation.org: checkpatch fixes] [akpm@linux-foundation.org: fix warnings] [akpm@linux-foudnation.org: redo intrusive kvm changes] Tested-by: Peter Senna Tschudin <peter.senna@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Gleb Natapov <gleb@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/af_netlink.c30
1 files changed, 11 insertions, 19 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 8097b4f3ead..1e3fd5bfcd8 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -248,11 +248,10 @@ static struct sock *netlink_lookup(struct net *net, int protocol, u32 portid)
struct nl_portid_hash *hash = &nl_table[protocol].hash;
struct hlist_head *head;
struct sock *sk;
- struct hlist_node *node;
read_lock(&nl_table_lock);
head = nl_portid_hashfn(hash, portid);
- sk_for_each(sk, node, head) {
+ sk_for_each(sk, head) {
if (net_eq(sock_net(sk), net) && (nlk_sk(sk)->portid == portid)) {
sock_hold(sk);
goto found;
@@ -312,9 +311,9 @@ static int nl_portid_hash_rehash(struct nl_portid_hash *hash, int grow)
for (i = 0; i <= omask; i++) {
struct sock *sk;
- struct hlist_node *node, *tmp;
+ struct hlist_node *tmp;
- sk_for_each_safe(sk, node, tmp, &otable[i])
+ sk_for_each_safe(sk, tmp, &otable[i])
__sk_add_node(sk, nl_portid_hashfn(hash, nlk_sk(sk)->portid));
}
@@ -344,7 +343,6 @@ static void
netlink_update_listeners(struct sock *sk)
{
struct netlink_table *tbl = &nl_table[sk->sk_protocol];
- struct hlist_node *node;
unsigned long mask;
unsigned int i;
struct listeners *listeners;
@@ -355,7 +353,7 @@ netlink_update_listeners(struct sock *sk)
for (i = 0; i < NLGRPLONGS(tbl->groups); i++) {
mask = 0;
- sk_for_each_bound(sk, node, &tbl->mc_list) {
+ sk_for_each_bound(sk, &tbl->mc_list) {
if (i < NLGRPLONGS(nlk_sk(sk)->ngroups))
mask |= nlk_sk(sk)->groups[i];
}
@@ -371,18 +369,17 @@ static int netlink_insert(struct sock *sk, struct net *net, u32 portid)
struct hlist_head *head;
int err = -EADDRINUSE;
struct sock *osk;
- struct hlist_node *node;
int len;
netlink_table_grab();
head = nl_portid_hashfn(hash, portid);
len = 0;
- sk_for_each(osk, node, head) {
+ sk_for_each(osk, head) {
if (net_eq(sock_net(osk), net) && (nlk_sk(osk)->portid == portid))
break;
len++;
}
- if (node)
+ if (osk)
goto err;
err = -EBUSY;
@@ -575,7 +572,6 @@ static int netlink_autobind(struct socket *sock)
struct nl_portid_hash *hash = &nl_table[sk->sk_protocol].hash;
struct hlist_head *head;
struct sock *osk;
- struct hlist_node *node;
s32 portid = task_tgid_vnr(current);
int err;
static s32 rover = -4097;
@@ -584,7 +580,7 @@ retry:
cond_resched();
netlink_table_grab();
head = nl_portid_hashfn(hash, portid);
- sk_for_each(osk, node, head) {
+ sk_for_each(osk, head) {
if (!net_eq(sock_net(osk), net))
continue;
if (nlk_sk(osk)->portid == portid) {
@@ -1101,7 +1097,6 @@ int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 portid
{
struct net *net = sock_net(ssk);
struct netlink_broadcast_data info;
- struct hlist_node *node;
struct sock *sk;
skb = netlink_trim(skb, allocation);
@@ -1124,7 +1119,7 @@ int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 portid
netlink_lock_table();
- sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
+ sk_for_each_bound(sk, &nl_table[ssk->sk_protocol].mc_list)
do_one_broadcast(sk, &info);
consume_skb(skb);
@@ -1200,7 +1195,6 @@ out:
int netlink_set_err(struct sock *ssk, u32 portid, u32 group, int code)
{
struct netlink_set_err_data info;
- struct hlist_node *node;
struct sock *sk;
int ret = 0;
@@ -1212,7 +1206,7 @@ int netlink_set_err(struct sock *ssk, u32 portid, u32 group, int code)
read_lock(&nl_table_lock);
- sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
+ sk_for_each_bound(sk, &nl_table[ssk->sk_protocol].mc_list)
ret += do_one_set_err(sk, &info);
read_unlock(&nl_table_lock);
@@ -1676,10 +1670,9 @@ int netlink_change_ngroups(struct sock *sk, unsigned int groups)
void __netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
{
struct sock *sk;
- struct hlist_node *node;
struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
- sk_for_each_bound(sk, node, &tbl->mc_list)
+ sk_for_each_bound(sk, &tbl->mc_list)
netlink_update_socket_mc(nlk_sk(sk), group, 0);
}
@@ -1974,14 +1967,13 @@ static struct sock *netlink_seq_socket_idx(struct seq_file *seq, loff_t pos)
struct nl_seq_iter *iter = seq->private;
int i, j;
struct sock *s;
- struct hlist_node *node;
loff_t off = 0;
for (i = 0; i < MAX_LINKS; i++) {
struct nl_portid_hash *hash = &nl_table[i].hash;
for (j = 0; j <= hash->mask; j++) {
- sk_for_each(s, node, &hash->table[j]) {
+ sk_for_each(s, &hash->table[j]) {
if (sock_net(s) != seq_file_net(seq))
continue;
if (off == pos) {