5 files changed, 13 insertions, 15 deletions

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 9421dae22737..668c7527b17e 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -427,7 +427,7 @@ static int check_export(struct path *path, int *flags, unsigned char *uuid)
 		return -EINVAL;
 	}
 
-	if (mnt_user_ns(path->mnt) != &init_user_ns) {
+	if (is_idmapped_mnt(path->mnt)) {
 		dprintk("exp_export: export of idmapped mounts not yet supported.\n");
 		return -EINVAL;
 	}
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 2c681785186f..8ef53f6726ec 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -434,22 +434,19 @@ nfsd3_proc_link(struct svc_rqst *rqstp)
 
 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
 				     struct nfsd3_readdirres *resp,
-				     int count)
+				     u32 count)
 {
 	struct xdr_buf *buf = &resp->dirlist;
 	struct xdr_stream *xdr = &resp->xdr;
 
-	count = min_t(u32, count, svc_max_payload(rqstp));
+	count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp));
 
 	memset(buf, 0, sizeof(*buf));
 
 	/* Reserve room for the NULL ptr & eof flag (-2 words) */
 	buf->buflen = count - XDR_UNIT * 2;
 	buf->pages = rqstp->rq_next_page;
-	while (count > 0) {
-		rqstp->rq_next_page++;
-		count -= PAGE_SIZE;
-	}
+	rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
 
 	/* This is xdr_init_encode(), but it assumes that
 	 * the head kvec has already been consumed. */
@@ -458,7 +455,7 @@ static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
 	xdr->page_ptr = buf->pages;
 	xdr->iov = NULL;
 	xdr->p = page_address(*buf->pages);
-	xdr->end = xdr->p + (PAGE_SIZE >> 2);
+	xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
 	xdr->rqst = NULL;
 }
 
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index b9f27fbcd768..68b020f2002b 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1247,7 +1247,8 @@ static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry)
 	clear_ncl(d_inode(dentry));
 	dget(dentry);
 	ret = simple_unlink(dir, dentry);
-	d_delete(dentry);
+	d_drop(dentry);
+	fsnotify_unlink(dir, dentry);
 	dput(dentry);
 	WARN_ON_ONCE(ret);
 }
@@ -1338,8 +1339,8 @@ void nfsd_client_rmdir(struct dentry *dentry)
 	dget(dentry);
 	ret = simple_rmdir(dir, dentry);
 	WARN_ON_ONCE(ret);
+	d_drop(dentry);
 	fsnotify_rmdir(dir, dentry);
-	d_delete(dentry);
 	dput(dentry);
 	inode_unlock(dir);
 }
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 48c7344151df..18b8eb43a19b 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -551,17 +551,17 @@ nfsd_proc_rmdir(struct svc_rqst *rqstp)
 
 static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
 				    struct nfsd_readdirres *resp,
-				    int count)
+				    u32 count)
 {
 	struct xdr_buf *buf = &resp->dirlist;
 	struct xdr_stream *xdr = &resp->xdr;
 
-	count = min_t(u32, count, PAGE_SIZE);
+	count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp));
 
 	memset(buf, 0, sizeof(*buf));
 
 	/* Reserve room for the NULL ptr & eof flag (-2 words) */
-	buf->buflen = count - sizeof(__be32) * 2;
+	buf->buflen = count - XDR_UNIT * 2;
 	buf->pages = rqstp->rq_next_page;
 	rqstp->rq_next_page++;
 
@@ -572,7 +572,7 @@ static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
 	xdr->page_ptr = buf->pages;
 	xdr->iov = NULL;
 	xdr->p = page_address(*buf->pages);
-	xdr->end = xdr->p + (PAGE_SIZE >> 2);
+	xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
 	xdr->rqst = NULL;
 }
 
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 07193595b8e0..b8c682b62d29 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -1020,7 +1020,7 @@ out:
 	}
 
 	/* Release module */
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }