Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/kernel/fs/reiserfs/xattr_trusted.c b/kernel/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 000000000..e4f134371
--- /dev/null
+++ b/kernel/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,56 @@
+#include "reiserfs.h"
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include "xattr.h"
+#include <linux/uaccess.h>
+
+static int
+trusted_get(struct dentry *dentry, const char *name, void *buffer, size_t size,
+	    int handler_flags)
+{
+	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+		return -EINVAL;
+
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
+		return -EPERM;
+
+	return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
+}
+
+static int
+trusted_set(struct dentry *dentry, const char *name, const void *buffer,
+	    size_t size, int flags, int handler_flags)
+{
+	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
+		return -EINVAL;
+
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
+		return -EPERM;
+
+	return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
+}
+
+static size_t trusted_list(struct dentry *dentry, char *list, size_t list_size,
+			   const char *name, size_t name_len, int handler_flags)
+{
+	const size_t len = name_len + 1;
+
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
+		return 0;
+
+	if (list && len <= list_size) {
+		memcpy(list, name, name_len);
+		list[name_len] = '\0';
+	}
+	return len;
+}
+
+const struct xattr_handler reiserfs_xattr_trusted_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = trusted_get,
+	.set = trusted_set,
+	.list = trusted_list,
+};