Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

This is an initial merge in of Eric Biederman's work to start adding
user namespace support to the networking.

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 47 insertions, 12 deletions

diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 9772fbd8a3f5..90bbefb57943 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -22,6 +22,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/export.h>
+#include <linux/pid_namespace.h>
 
 #include <net/net_namespace.h>
 #include <net/sock.h>
@@ -91,6 +92,8 @@ static struct ip6_flowlabel *fl_lookup(struct net *net, __be32 label)
 static void fl_free(struct ip6_flowlabel *fl)
 {
 	if (fl) {
+		if (fl->share == IPV6_FL_S_PROCESS)
+			put_pid(fl->owner.pid);
 		release_net(fl->fl_net);
 		kfree(fl->opt);
 	}
@@ -394,10 +397,10 @@ fl_create(struct net *net, struct sock *sk, struct in6_flowlabel_req *freq,
 	case IPV6_FL_S_ANY:
 		break;
 	case IPV6_FL_S_PROCESS:
-		fl->owner = current->pid;
+		fl->owner.pid = get_task_pid(current, PIDTYPE_PID);
 		break;
 	case IPV6_FL_S_USER:
-		fl->owner = current_euid();
+		fl->owner.uid = current_euid();
 		break;
 	default:
 		err = -EINVAL;
@@ -561,7 +564,10 @@ recheck:
 				err = -EPERM;
 				if (fl1->share == IPV6_FL_S_EXCL ||
 				    fl1->share != fl->share ||
-				    fl1->owner != fl->owner)
+				    ((fl1->share == IPV6_FL_S_PROCESS) &&
+				     (fl1->owner.pid == fl->owner.pid)) ||
+				    ((fl1->share == IPV6_FL_S_USER) &&
+				     uid_eq(fl1->owner.uid, fl->owner.uid)))
 					goto release;
 
 				err = -EINVAL;
@@ -621,6 +627,7 @@ done:
 
 struct ip6fl_iter_state {
 	struct seq_net_private p;
+	struct pid_namespace *pid_ns;
 	int bucket;
 };
 
@@ -699,6 +706,7 @@ static void ip6fl_seq_stop(struct seq_file *seq, void *v)
 
 static int ip6fl_seq_show(struct seq_file *seq, void *v)
 {
+	struct ip6fl_iter_state *state = ip6fl_seq_private(seq);
 	if (v == SEQ_START_TOKEN)
 		seq_printf(seq, "%-5s %-1s %-6s %-6s %-6s %-8s %-32s %s\n",
 			   "Label", "S", "Owner", "Users", "Linger", "Expires", "Dst", "Opt");
@@ -708,7 +716,11 @@ static int ip6fl_seq_show(struct seq_file *seq, void *v)
 			   "%05X %-1d %-6d %-6d %-6ld %-8ld %pi6 %-4d\n",
 			   (unsigned int)ntohl(fl->label),
 			   fl->share,
-			   (int)fl->owner,
+			   ((fl->share == IPV6_FL_S_PROCESS) ?
+			    pid_nr_ns(fl->owner.pid, state->pid_ns) :
+			    ((fl->share == IPV6_FL_S_USER) ?
+			     from_kuid_munged(seq_user_ns(seq), fl->owner.uid) :
+			     0)),
 			   atomic_read(&fl->users),
 			   fl->linger/HZ,
 			   (long)(fl->expires - jiffies)/HZ,
@@ -727,8 +739,29 @@ static const struct seq_operations ip6fl_seq_ops = {
 
 static int ip6fl_seq_open(struct inode *inode, struct file *file)
 {
-	return seq_open_net(inode, file, &ip6fl_seq_ops,
-			    sizeof(struct ip6fl_iter_state));
+	struct seq_file *seq;
+	struct ip6fl_iter_state *state;
+	int err;
+
+	err = seq_open_net(inode, file, &ip6fl_seq_ops,
+			   sizeof(struct ip6fl_iter_state));
+
+	if (!err) {
+		seq = file->private_data;
+		state = ip6fl_seq_private(seq);
+		rcu_read_lock();
+		state->pid_ns = get_pid_ns(task_active_pid_ns(current));
+		rcu_read_unlock();
+	}
+	return err;
+}
+
+static int ip6fl_seq_release(struct inode *inode, struct file *file)
+{
+	struct seq_file *seq = file->private_data;
+	struct ip6fl_iter_state *state = ip6fl_seq_private(seq);
+	put_pid_ns(state->pid_ns);
+	return seq_release_net(inode, file);
 }
 
 static const struct file_operations ip6fl_seq_fops = {
@@ -736,7 +769,7 @@ static const struct file_operations ip6fl_seq_fops = {
 	.open		=	ip6fl_seq_open,
 	.read		=	seq_read,
 	.llseek		=	seq_lseek,
-	.release	=	seq_release_net,
+	.release	=	ip6fl_seq_release,
 };
 
 static int __net_init ip6_flowlabel_proc_init(struct net *net)
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index ef0579d5bca6..7af88ef01657 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1251,7 +1251,8 @@ static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i)
 		   sk_wmem_alloc_get(sp),
 		   sk_rmem_alloc_get(sp),
 		   0, 0L, 0,
-		   sock_i_uid(sp), 0,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
+		   0,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops));
 }
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index cd49de3678fb..f99b81d53cca 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1828,7 +1828,7 @@ static void tcp_v6_destroy_sock(struct sock *sk)
 #ifdef CONFIG_PROC_FS
 /* Proc filesystem TCPv6 sock list dumping. */
 static void get_openreq6(struct seq_file *seq,
-			 const struct sock *sk, struct request_sock *req, int i, int uid)
+			 const struct sock *sk, struct request_sock *req, int i, kuid_t uid)
 {
 	int ttd = req->expires - jiffies;
 	const struct in6_addr *src = &inet6_rsk(req)->loc_addr;
@@ -1852,7 +1852,7 @@ static void get_openreq6(struct seq_file *seq,
 		   1,   /* timers active (only the expire timer) */
 		   jiffies_to_clock_t(ttd),
 		   req->retrans,
-		   uid,
+		   from_kuid_munged(seq_user_ns(seq), uid),
 		   0,  /* non standard timer */
 		   0, /* open_requests have no inode */
 		   0, req);
@@ -1902,7 +1902,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 		   timer_active,
 		   jiffies_delta_to_clock_t(timer_expires - jiffies),
 		   icsk->icsk_retransmits,
-		   sock_i_uid(sp),
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
 		   icsk->icsk_probes_out,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp,
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 99d0077b56b8..bbdff07eebe1 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1458,7 +1458,8 @@ static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket
 		   sk_wmem_alloc_get(sp),
 		   sk_rmem_alloc_get(sp),
 		   0, 0L, 0,
-		   sock_i_uid(sp), 0,
+		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)),
+		   0,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp,
 		   atomic_read(&sp->sk_drops));