2 files changed, 13 insertions, 6 deletions

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index c9e3b5a8fe07..443ebc52e382 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1114,7 +1114,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
          */
         if (!resfhp->fh_dentry) {
                 /* called from nfsd_proc_mkdir, or possibly nfsd3_proc_create */
-                fh_lock(fhp);
+                fh_lock_nested(fhp, I_MUTEX_PARENT);
                 dchild = lookup_one_len(fname, dentry, flen);
                 err = PTR_ERR(dchild);
                 if (IS_ERR(dchild))
@@ -1240,7 +1240,7 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
         err = nfserr_notdir;
         if(!dirp->i_op || !dirp->i_op->lookup)
                 goto out;
-        fh_lock(fhp);
+        fh_lock_nested(fhp, I_MUTEX_PARENT);
 
         /*
          * Compose the response file handle.
@@ -1494,7 +1494,7 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
         if (isdotent(name, len))
                 goto out;
 
-        fh_lock(ffhp);
+        fh_lock_nested(ffhp, I_MUTEX_PARENT);
         ddir = ffhp->fh_dentry;
         dirp = ddir->d_inode;
 
@@ -1644,7 +1644,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
         if (err)
                 goto out;
 
-        fh_lock(fhp);
+        fh_lock_nested(fhp, I_MUTEX_PARENT);
         dentry = fhp->fh_dentry;
         dirp = dentry->d_inode;
 
diff --git a/include/linux/nfsd/nfsfh.h b/include/linux/nfsd/nfsfh.h
index 31a3cb617ce0..069257ea99a0 100644
--- a/include/linux/nfsd/nfsfh.h
+++ b/include/linux/nfsd/nfsfh.h
@@ -290,8 +290,9 @@ fill_post_wcc(struct svc_fh *fhp)
  * vfs.c:nfsd_rename as it needs to grab 2 i_mutex's at once
  * so, any changes here should be reflected there.
  */
+
 static inline void
-fh_lock(struct svc_fh *fhp)
+fh_lock_nested(struct svc_fh *fhp, unsigned int subclass)
 {
         struct dentry   *dentry = fhp->fh_dentry;
         struct inode    *inode;
@@ -310,11 +311,17 @@ fh_lock(struct svc_fh *fhp)
         }
 
         inode = dentry->d_inode;
-        mutex_lock(&inode->i_mutex);
+        mutex_lock_nested(&inode->i_mutex, subclass);
         fill_pre_wcc(fhp);
         fhp->fh_locked = 1;
 }
 
+static inline void
+fh_lock(struct svc_fh *fhp)
+{
+        fh_lock_nested(fhp, I_MUTEX_NORMAL);
+}
+
 /*
  * Unlock a file handle/inode
  */