kernel: update yaffs code

[15.05/openwrt.git] / target / linux / generic / files / fs / yaffs2 / yaffs_attribs.c

diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_attribs.c b/target/linux/generic/files/fs/yaffs2/yaffs_attribs.c
new file mode 100644 (file)
index 0000000..3d778f2
--- /dev/null
+++ b/target/linux/generic/files/fs/yaffs2/yaffs_attribs.c
@@ -0,0 +1,124 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2011 Aleph One Ltd.
+ *   for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "yaffs_guts.h"
+#include "yaffs_attribs.h"
+
+void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
+{
+       obj->yst_uid = oh->yst_uid;
+       obj->yst_gid = oh->yst_gid;
+       obj->yst_atime = oh->yst_atime;
+       obj->yst_mtime = oh->yst_mtime;
+       obj->yst_ctime = oh->yst_ctime;
+       obj->yst_rdev = oh->yst_rdev;
+}
+
+void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
+{
+       oh->yst_uid = obj->yst_uid;
+       oh->yst_gid = obj->yst_gid;
+       oh->yst_atime = obj->yst_atime;
+       oh->yst_mtime = obj->yst_mtime;
+       oh->yst_ctime = obj->yst_ctime;
+       oh->yst_rdev = obj->yst_rdev;
+
+}
+
+void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
+{
+       obj->yst_mtime = Y_CURRENT_TIME;
+       if (do_a)
+               obj->yst_atime = obj->yst_mtime;
+       if (do_c)
+               obj->yst_ctime = obj->yst_mtime;
+}
+
+void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
+{
+       yaffs_load_current_time(obj, 1, 1);
+       obj->yst_rdev = rdev;
+       obj->yst_uid = uid;
+       obj->yst_gid = gid;
+}
+
+static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
+{
+       YCHAR *alias = NULL;
+       obj = yaffs_get_equivalent_obj(obj);
+
+       switch (obj->variant_type) {
+       case YAFFS_OBJECT_TYPE_FILE:
+               return obj->variant.file_variant.file_size;
+       case YAFFS_OBJECT_TYPE_SYMLINK:
+               alias = obj->variant.symlink_variant.alias;
+               if (!alias)
+                       return 0;
+               return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
+       default:
+               return 0;
+       }
+}
+
+int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
+{
+       unsigned int valid = attr->ia_valid;
+
+       if (valid & ATTR_MODE)
+               obj->yst_mode = attr->ia_mode;
+       if (valid & ATTR_UID)
+               obj->yst_uid = attr->ia_uid;
+       if (valid & ATTR_GID)
+               obj->yst_gid = attr->ia_gid;
+
+       if (valid & ATTR_ATIME)
+               obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
+       if (valid & ATTR_CTIME)
+               obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
+       if (valid & ATTR_MTIME)
+               obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
+
+       if (valid & ATTR_SIZE)
+               yaffs_resize_file(obj, attr->ia_size);
+
+       yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
+
+       return YAFFS_OK;
+
+}
+
+int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
+{
+       unsigned int valid = 0;
+
+       attr->ia_mode = obj->yst_mode;
+       valid |= ATTR_MODE;
+       attr->ia_uid = obj->yst_uid;
+       valid |= ATTR_UID;
+       attr->ia_gid = obj->yst_gid;
+       valid |= ATTR_GID;
+
+       Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
+       valid |= ATTR_ATIME;
+       Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
+       valid |= ATTR_CTIME;
+       Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
+       valid |= ATTR_MTIME;
+
+       attr->ia_size = yaffs_get_file_size(obj);
+       valid |= ATTR_SIZE;
+
+       attr->ia_valid = valid;
+
+       return YAFFS_OK;
+}