5 files changed, 19 insertions, 4 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index d384a8b77ee8..aa5ecf479a57 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -183,7 +183,7 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
         else
                 flock.length = fl->fl_end - fl->fl_start + 1;
         flock.proc_id = fl->fl_pid;
-        flock.client_id = utsname()->nodename;
+        flock.client_id = fid->clnt->name;
         if (IS_SETLKW(cmd))
                 flock.flags = P9_LOCK_FLAGS_BLOCK;
 
@@ -260,7 +260,7 @@ static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
         else
                 glock.length = fl->fl_end - fl->fl_start + 1;
         glock.proc_id = fl->fl_pid;
-        glock.client_id = utsname()->nodename;
+        glock.client_id = fid->clnt->name;
 
         res = p9_client_getlock_dotl(fid, &glock);
         if (res < 0)
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 25b018efb8ab..94de6d1482e2 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -146,7 +146,7 @@ static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
                 char type = 0, ext[32];
                 int major = -1, minor = -1;
 
-                strncpy(ext, stat->extension, sizeof(ext));
+                strlcpy(ext, stat->extension, sizeof(ext));
                 sscanf(ext, "%c %u %u", &type, &major, &minor);
                 switch (type) {
                 case 'c':
@@ -1186,7 +1186,7 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
                          * this even with .u extension. So check
                          * for non NULL stat->extension
                          */
-                        strncpy(ext, stat->extension, sizeof(ext));
+                        strlcpy(ext, stat->extension, sizeof(ext));
                         /* HARDLINKCOUNT %u */
                         sscanf(ext, "%13s %u", tag_name, &i_nlink);
                         if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 4c7c01a73911..c38a005bd0cf 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -26,6 +26,8 @@
 #ifndef NET_9P_CLIENT_H
 #define NET_9P_CLIENT_H
 
+#include <linux/utsname.h>
+
 /* Number of requests per row */
 #define P9_ROW_MAXTAG 255
 
@@ -134,6 +136,7 @@ struct p9_req_t {
  * @tagpool - transaction id accounting for session
  * @reqs - 2D array of requests
  * @max_tag - current maximum tag id allocated
+ * @name - node name used as client id
  *
  * The client structure is used to keep track of various per-client
  * state that has been instantiated.
@@ -164,6 +167,8 @@ struct p9_client {
         struct p9_idpool *tagpool;
         struct p9_req_t *reqs[P9_ROW_MAXTAG];
         int max_tag;
+
+        char name[__NEW_UTS_LEN + 1];
 };
 
 /**
diff --git a/net/9p/client.c b/net/9p/client.c
index ba93bdab2701..ee8fd6bd4035 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -987,6 +987,7 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
 {
         int err;
         struct p9_client *clnt;
+        char *client_id;
 
         err = 0;
         clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
@@ -995,6 +996,10 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
 
         clnt->trans_mod = NULL;
         clnt->trans = NULL;
+
+        client_id = utsname()->nodename;
+        memcpy(clnt->name, client_id, strlen(client_id) + 1);
+
         spin_lock_init(&clnt->lock);
         INIT_LIST_HEAD(&clnt->fidlist);
 
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index e1c26b101830..990afab2be1b 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -577,6 +577,10 @@ static int p9_virtio_probe(struct virtio_device *vdev)
         mutex_lock(&virtio_9p_lock);
         list_add_tail(&chan->chan_list, &virtio_chan_list);
         mutex_unlock(&virtio_9p_lock);
+
+        /* Let udev rules use the new mount_tag attribute. */
+        kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
+
         return 0;
 
 out_free_tag:
@@ -654,6 +658,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
         list_del(&chan->chan_list);
         mutex_unlock(&virtio_9p_lock);
         sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
+        kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
         kfree(chan->tag);
         kfree(chan->vc_wq);
         kfree(chan);