zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/fs/reiserfs/xattr_trusted.c b/ap/os/linux/linux-3.4.x/fs/reiserfs/xattr_trusted.c
new file mode 100644
index 0000000..a003571
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/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 <asm/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(dentry->d_inode))
+ return -EPERM;
+
+ return reiserfs_xattr_get(dentry->d_inode, 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(dentry->d_inode))
+ return -EPERM;
+
+ return reiserfs_xattr_set(dentry->d_inode, 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(dentry->d_inode))
+ 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,
+};