fs/9p: Pass the correct user credentials during attach

We need to make sure we pass the right uid value
during attach. dotl is similar to dotu in this regard.
Without this mapped security model on dotl doesn't work

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

2 files changed, 3 insertions, 2 deletions

diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 7317b39b2815..5d6cfcbf73e7 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -152,7 +152,8 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
                         if (access == V9FS_ACCESS_SINGLE)
                                 return ERR_PTR(-EPERM);
 
-                        if (v9fs_proto_dotu(v9ses))
+                        if (v9fs_proto_dotu(v9ses) ||
+                                v9fs_proto_dotl(v9ses))
                                 uname = NULL;
                         else
                                 uname = v9ses->uname;
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index f8b86e92cd66..3c492011221c 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -278,7 +278,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
         v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
 
         /* for legacy mode, fall back to V9FS_ACCESS_ANY */
-        if (!v9fs_proto_dotu(v9ses) &&
+        if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) &&
                 ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
 
                 v9ses->flags &= ~V9FS_ACCESS_MASK;