2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2018 Aleph One Ltd.
6 * Created by Charles Manning <charles@aleph1.co.uk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include "yaffs_guts.h"
14 #include "yaffs_attribs.h"
16 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0))
17 #define IATTR_UID ia_uid
18 #define IATTR_GID ia_gid
20 #define IATTR_UID ia_uid.val
21 #define IATTR_GID ia_gid.val
25 * Loading attibs from/to object header assumes the object header
28 void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
30 obj->yst_uid = oh->yst_uid;
31 obj->yst_gid = oh->yst_gid;
32 obj->yst_atime = oh->yst_atime;
33 obj->yst_mtime = oh->yst_mtime;
34 obj->yst_ctime = oh->yst_ctime;
35 obj->yst_rdev = oh->yst_rdev;
38 void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
40 oh->yst_uid = obj->yst_uid;
41 oh->yst_gid = obj->yst_gid;
42 oh->yst_atime = obj->yst_atime;
43 oh->yst_mtime = obj->yst_mtime;
44 oh->yst_ctime = obj->yst_ctime;
45 oh->yst_rdev = obj->yst_rdev;
49 void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
51 obj->yst_mtime = Y_CURRENT_TIME;
53 obj->yst_atime = obj->yst_mtime;
55 obj->yst_ctime = obj->yst_mtime;
58 void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
60 yaffs_load_current_time(obj, 1, 1);
66 static loff_t yaffs_get_file_size(struct yaffs_obj *obj)
69 obj = yaffs_get_equivalent_obj(obj);
71 switch (obj->variant_type) {
72 case YAFFS_OBJECT_TYPE_FILE:
73 return obj->variant.file_variant.file_size;
74 case YAFFS_OBJECT_TYPE_SYMLINK:
75 alias = obj->variant.symlink_variant.alias;
78 return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
84 int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
86 unsigned int valid = attr->ia_valid;
88 if (valid & ATTR_MODE)
89 obj->yst_mode = attr->ia_mode;
91 obj->yst_uid = attr->IATTR_UID;
93 obj->yst_gid = attr->IATTR_GID;
95 if (valid & ATTR_ATIME)
96 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
97 if (valid & ATTR_CTIME)
98 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
99 if (valid & ATTR_MTIME)
100 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
102 if (valid & ATTR_SIZE)
103 yaffs_resize_file(obj, attr->ia_size);
105 yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
111 int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
113 unsigned int valid = 0;
115 attr->ia_mode = obj->yst_mode;
117 attr->IATTR_UID = obj->yst_uid;
119 attr->IATTR_GID = obj->yst_gid;
122 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
124 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
126 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
129 attr->ia_size = yaffs_get_file_size(obj);
132 attr->ia_valid = valid;