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/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2018 Aleph One Ltd.
*
* 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"
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
#define IATTR_UID ia_uid
#define IATTR_GID ia_gid
#else
#define IATTR_UID ia_uid.val
#define IATTR_GID ia_gid.val
#endif
/*
* Loading attibs from/to object header assumes the object header
* is in cpu endian.
*/
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->IATTR_UID;
if (valid & ATTR_GID)
obj->yst_gid = attr->IATTR_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->IATTR_UID = obj->yst_uid;
valid |= ATTR_UID;
attr->IATTR_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;
}
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