Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 000000000..5ed48da3d
--- /dev/null
+++ b/fs/reiserfs/xattr_trusted.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+#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(const struct xattr_handler *handler, struct dentry *unused,
+	    struct inode *inode, const char *name, void *buffer, size_t size)
+{
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
+		return -EPERM;
+
+	return reiserfs_xattr_get(inode, xattr_full_name(handler, name),
+				  buffer, size);
+}
+
+static int
+trusted_set(const struct xattr_handler *handler, struct dentry *unused,
+	    struct inode *inode, const char *name, const void *buffer,
+	    size_t size, int flags)
+{
+	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
+		return -EPERM;
+
+	return reiserfs_xattr_set(inode,
+				  xattr_full_name(handler, name),
+				  buffer, size, flags);
+}
+
+static bool trusted_list(struct dentry *dentry)
+{
+	return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry));
+}
+
+const struct xattr_handler reiserfs_xattr_trusted_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = trusted_get,
+	.set = trusted_set,
+	.list = trusted_list,
+};