1 files changed, 37 insertions, 5 deletions

diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 84ce601d8063..c827acb0e943 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -28,6 +28,7 @@
 #include <asm/uaccess.h>
 #include <linux/exportfs.h>
 #include <linux/writeback.h>
+#include <linux/security.h>
 
 #ifdef CONFIG_NFSD_V3
 #include "xdr3.h"
@@ -621,6 +622,33 @@ int nfsd4_is_junction(struct dentry *dentry)
 		return 0;
 	return 1;
 }
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
+__be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
+		struct xdr_netobj *label)
+{
+	__be32 error;
+	int host_error;
+	struct dentry *dentry;
+
+	error = fh_verify(rqstp, fhp, 0 /* S_IFREG */, NFSD_MAY_SATTR);
+	if (error)
+		return error;
+
+	dentry = fhp->fh_dentry;
+
+	mutex_lock(&dentry->d_inode->i_mutex);
+	host_error = security_inode_setsecctx(dentry, label->data, label->len);
+	mutex_unlock(&dentry->d_inode->i_mutex);
+	return nfserrno(host_error);
+}
+#else
+__be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
+		struct xdr_netobj *label)
+{
+	return nfserr_notsupp;
+}
+#endif
+
 #endif /* defined(CONFIG_NFSD_V4) */
 
 #ifdef CONFIG_NFSD_V3
@@ -802,9 +830,10 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
 			flags = O_WRONLY|O_LARGEFILE;
 	}
 	*filp = dentry_open(&path, flags, current_cred());
-	if (IS_ERR(*filp))
+	if (IS_ERR(*filp)) {
 		host_err = PTR_ERR(*filp);
-	else {
+		*filp = NULL;
+	} else {
 		host_err = ima_file_check(*filp, may_flags);
 
 		if (may_flags & NFSD_MAY_64BIT_COOKIE)
@@ -1912,6 +1941,7 @@ struct buffered_dirent {
 };
 
 struct readdir_data {
+	struct dir_context ctx;
 	char		*dirent;
 	size_t		used;
 	int		full;
@@ -1943,13 +1973,15 @@ static int nfsd_buffered_filldir(void *__buf, const char *name, int namlen,
 static __be32 nfsd_buffered_readdir(struct file *file, filldir_t func,
 				    struct readdir_cd *cdp, loff_t *offsetp)
 {
-	struct readdir_data buf;
 	struct buffered_dirent *de;
 	int host_err;
 	int size;
 	loff_t offset;
+	struct readdir_data buf = {
+		.ctx.actor = nfsd_buffered_filldir,
+		.dirent = (void *)__get_free_page(GFP_KERNEL)
+	};
 
-	buf.dirent = (void *)__get_free_page(GFP_KERNEL);
 	if (!buf.dirent)
 		return nfserrno(-ENOMEM);
 
@@ -1963,7 +1995,7 @@ static __be32 nfsd_buffered_readdir(struct file *file, filldir_t func,
 		buf.used = 0;
 		buf.full = 0;
 
-		host_err = vfs_readdir(file, nfsd_buffered_filldir, &buf);
+		host_err = iterate_dir(file, &buf.ctx);
 		if (buf.full)
 			host_err = 0;