mirror of https://github.com/hak5/openwrt.git
125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2011 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "yaffs_guts.h"
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#include "yaffs_attribs.h"
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void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
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{
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obj->yst_uid = oh->yst_uid;
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obj->yst_gid = oh->yst_gid;
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obj->yst_atime = oh->yst_atime;
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obj->yst_mtime = oh->yst_mtime;
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obj->yst_ctime = oh->yst_ctime;
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obj->yst_rdev = oh->yst_rdev;
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}
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void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
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{
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oh->yst_uid = obj->yst_uid;
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oh->yst_gid = obj->yst_gid;
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oh->yst_atime = obj->yst_atime;
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oh->yst_mtime = obj->yst_mtime;
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oh->yst_ctime = obj->yst_ctime;
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oh->yst_rdev = obj->yst_rdev;
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}
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void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
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{
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obj->yst_mtime = Y_CURRENT_TIME;
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if (do_a)
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obj->yst_atime = obj->yst_mtime;
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if (do_c)
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obj->yst_ctime = obj->yst_mtime;
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}
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void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
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{
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yaffs_load_current_time(obj, 1, 1);
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obj->yst_rdev = rdev;
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obj->yst_uid = uid;
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obj->yst_gid = gid;
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}
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static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
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{
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YCHAR *alias = NULL;
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obj = yaffs_get_equivalent_obj(obj);
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switch (obj->variant_type) {
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case YAFFS_OBJECT_TYPE_FILE:
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return obj->variant.file_variant.file_size;
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case YAFFS_OBJECT_TYPE_SYMLINK:
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alias = obj->variant.symlink_variant.alias;
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if (!alias)
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return 0;
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return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
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default:
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return 0;
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}
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}
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int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
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{
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unsigned int valid = attr->ia_valid;
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if (valid & ATTR_MODE)
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obj->yst_mode = attr->ia_mode;
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if (valid & ATTR_UID)
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obj->yst_uid = attr->ia_uid;
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if (valid & ATTR_GID)
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obj->yst_gid = attr->ia_gid;
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if (valid & ATTR_ATIME)
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obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
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if (valid & ATTR_CTIME)
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obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
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if (valid & ATTR_MTIME)
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obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
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if (valid & ATTR_SIZE)
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yaffs_resize_file(obj, attr->ia_size);
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yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
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return YAFFS_OK;
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}
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int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
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{
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unsigned int valid = 0;
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attr->ia_mode = obj->yst_mode;
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valid |= ATTR_MODE;
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attr->ia_uid = obj->yst_uid;
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valid |= ATTR_UID;
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attr->ia_gid = obj->yst_gid;
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valid |= ATTR_GID;
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Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
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valid |= ATTR_ATIME;
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Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
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valid |= ATTR_CTIME;
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Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
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valid |= ATTR_MTIME;
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attr->ia_size = yaffs_get_file_size(obj);
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valid |= ATTR_SIZE;
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attr->ia_valid = valid;
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return YAFFS_OK;
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}
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