X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Fbrcompat.c;h=f23db93cefd417529a2cb73804ad2ed24b6c0678;hb=e22d4953ec00df611fff0fd36ac81087c63e1d1e;hp=b68720bd811f3e031aab7237faeb83cd59bcc06b;hpb=fceb2a5bb2063023777fc75c68a2670b5169fa13;p=openvswitch

diff --git a/datapath/brcompat.c b/datapath/brcompat.c
index b68720bd..f23db93c 100644
--- a/datapath/brcompat.c
+++ b/datapath/brcompat.c
@@ -6,6 +6,8 @@
  * kernel, by Linus Torvalds and others.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <asm/uaccess.h>
 #include <linux/completion.h>
@@ -82,6 +84,9 @@ static int brc_add_del_bridge(char __user *uname, int add)
 	struct sk_buff *request;
 	char name[IFNAMSIZ];
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (copy_from_user(name, uname, IFNAMSIZ))
 		return -EFAULT;
 
@@ -194,6 +199,9 @@ static int brc_add_del_port(struct net_device *dev, int port_ifindex, int add)
 	struct net_device *port;
 	int err;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	port = __dev_get_by_index(&init_net, port_ifindex);
 	if (!port)
 		return -EINVAL;
@@ -216,14 +224,13 @@ static int brc_get_bridge_info(struct net_device *dev,
 			       struct __bridge_info __user *ub)
 {
 	struct __bridge_info b;
-	u64 id = 0;
-	int i;
 
 	memset(&b, 0, sizeof(struct __bridge_info));
 
-	for (i=0; i<ETH_ALEN; i++)
-		id |= (u64)dev->dev_addr[i] << (8*(ETH_ALEN-1 - i));
-	b.bridge_id = cpu_to_be64(id);
+	/* First two bytes are the priority, which we should skip.  This comes
+	 * from struct bridge_id in br_private.h, which is unavailable to us.
+	 */
+	memcpy((u8 *)&b.bridge_id + 2, dev->dev_addr, ETH_ALEN);
 	b.stp_enabled = 0;
 
 	if (copy_to_user(ub, &b, sizeof(struct __bridge_info)))
@@ -252,7 +259,7 @@ static int brc_get_port_list(struct net_device *dev, int __user *uindices,
  *            (limited to a page for sanity)
  * offset  -- number of records to skip
  */
-static int brc_get_fdb_entries(struct net_device *dev, void __user *userbuf, 
+static int brc_get_fdb_entries(struct net_device *dev, void __user *userbuf,
 			       unsigned long maxnum, unsigned long offset)
 {
 	struct nlattr *attrs[BRC_GENL_A_MAX + 1];
@@ -370,7 +377,7 @@ static int brc_genl_query(struct sk_buff *skb, struct genl_info *info)
 	void *data;
 
 	ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!ans_skb) 
+	if (!ans_skb)
 		return -ENOMEM;
 
 	data = genlmsg_put_reply(ans_skb, info, &brc_genl_family,
@@ -425,8 +432,7 @@ static int brc_genl_dp_result(struct sk_buff *skb, struct genl_info *info)
 	if (brc_seq == info->snd_seq) {
 		brc_seq++;
 
-		if (brc_reply)
-			kfree_skb(brc_reply);
+		kfree_skb(brc_reply);
 		brc_reply = skb;
 
 		complete(&brc_done);
@@ -482,7 +488,7 @@ static struct sk_buff *brc_send_command(struct sk_buff *request,
 	/* Wait for reply. */
 	error = -ETIMEDOUT;
 	if (!wait_for_completion_timeout(&brc_done, BRC_TIMEOUT)) {
-		printk(KERN_WARNING "brcompat: timed out waiting for userspace\n");
+		pr_warn("timed out waiting for userspace\n");
 		goto error;
     }
 
@@ -531,15 +537,15 @@ static int __init brc_init(void)
 		goto error;
 
 	err = genl_register_ops(&brc_genl_family, &brc_genl_ops_query_dp);
-	if (err != 0) 
+	if (err != 0)
 		goto err_unregister;
 
 	err = genl_register_ops(&brc_genl_family, &brc_genl_ops_dp_result);
-	if (err != 0) 
+	if (err != 0)
 		goto err_unregister;
 
 	err = genl_register_ops(&brc_genl_family, &brc_genl_ops_set_proc);
-	if (err != 0) 
+	if (err != 0)
 		goto err_unregister;
 
 	strcpy(brc_mc_group.name, "brcompat");
@@ -552,7 +558,7 @@ static int __init brc_init(void)
 err_unregister:
 	genl_unregister_family(&brc_genl_family);
 error:
-	printk(KERN_EMERG "brcompat: failed to install!");
+	pr_emerg("failed to install!\n");
 	return err;
 }