1 /*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2011 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
6 *
7 * Created by Charles Manning <charles@aleph1.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include "yaffs_attribs.h"
15
16
yaffs_load_attribs(struct yaffs_obj * obj,struct yaffs_obj_hdr * oh)17 void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh)
18 {
19 obj->yst_uid = oh->yst_uid;
20 obj->yst_gid = oh->yst_gid;
21 obj->yst_atime = oh->yst_atime;
22 obj->yst_mtime = oh->yst_mtime;
23 obj->yst_ctime = oh->yst_ctime;
24 obj->yst_rdev = oh->yst_rdev;
25 }
26
27
yaffs_load_attribs_oh(struct yaffs_obj_hdr * oh,struct yaffs_obj * obj)28 void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj)
29 {
30 #ifdef CONFIG_YAFFS_WINCE
31 oh->win_atime[0] = obj->win_atime[0];
32 oh->win_ctime[0] = obj->win_ctime[0];
33 oh->win_mtime[0] = obj->win_mtime[0];
34 oh->win_atime[1] = obj->win_atime[1];
35 oh->win_ctime[1] = obj->win_ctime[1];
36 oh->win_mtime[1] = obj->win_mtime[1];
37 #else
38 oh->yst_uid = obj->yst_uid;
39 oh->yst_gid = obj->yst_gid;
40 oh->yst_atime = obj->yst_atime;
41 oh->yst_mtime = obj->yst_mtime;
42 oh->yst_ctime = obj->yst_ctime;
43 oh->yst_rdev = obj->yst_rdev;
44 #endif
45
46 }
47
yaffs_attribs_init(struct yaffs_obj * obj,u32 gid,u32 uid,u32 rdev)48 void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev)
49 {
50
51 #ifdef CONFIG_YAFFS_WINCE
52 yfsd_win_file_time_now(obj->win_atime);
53 obj->win_ctime[0] = obj->win_mtime[0] = obj->win_atime[0];
54 obj->win_ctime[1] = obj->win_mtime[1] = obj->win_atime[1];
55
56 #else
57 yaffs_load_current_time(obj, 1, 1);
58 obj->yst_rdev = rdev;
59 obj->yst_uid = uid;
60 obj->yst_gid = gid;
61 #endif
62 }
63
yaffs_load_current_time(struct yaffs_obj * obj,int do_a,int do_c)64 void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c)
65 {
66 #ifdef CONFIG_YAFFS_WINCE
67 yfsd_win_file_time_now(the_obj->win_atime);
68 the_obj->win_ctime[0] = the_obj->win_mtime[0] =
69 the_obj->win_atime[0];
70 the_obj->win_ctime[1] = the_obj->win_mtime[1] =
71 the_obj->win_atime[1];
72
73 #else
74
75 obj->yst_mtime = Y_CURRENT_TIME;
76 if (do_a)
77 obj->yst_atime = obj->yst_atime;
78 if (do_c)
79 obj->yst_ctime = obj->yst_atime;
80 #endif
81 }
82
yaffs_get_file_size(struct yaffs_obj * obj)83 loff_t yaffs_get_file_size(struct yaffs_obj *obj)
84 {
85 YCHAR *alias = NULL;
86 obj = yaffs_get_equivalent_obj(obj);
87
88 switch (obj->variant_type) {
89 case YAFFS_OBJECT_TYPE_FILE:
90 return obj->variant.file_variant.file_size;
91 case YAFFS_OBJECT_TYPE_SYMLINK:
92 alias = obj->variant.symlink_variant.alias;
93 if (!alias)
94 return 0;
95 return yaffs_strnlen(alias, YAFFS_MAX_ALIAS_LENGTH);
96 default:
97 return 0;
98 }
99 }
100
yaffs_set_attribs(struct yaffs_obj * obj,struct iattr * attr)101 int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr)
102 {
103 unsigned int valid = attr->ia_valid;
104
105 if (valid & ATTR_MODE)
106 obj->yst_mode = attr->ia_mode;
107 if (valid & ATTR_UID)
108 obj->yst_uid = attr->ia_uid;
109 if (valid & ATTR_GID)
110 obj->yst_gid = attr->ia_gid;
111
112 if (valid & ATTR_ATIME)
113 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
114 if (valid & ATTR_CTIME)
115 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
116 if (valid & ATTR_MTIME)
117 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
118
119 if (valid & ATTR_SIZE)
120 yaffs_resize_file(obj, attr->ia_size);
121
122 yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
123
124 return YAFFS_OK;
125
126 }
127
yaffs_get_attribs(struct yaffs_obj * obj,struct iattr * attr)128 int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr)
129 {
130 unsigned int valid = 0;
131
132 attr->ia_mode = obj->yst_mode;
133 valid |= ATTR_MODE;
134 attr->ia_uid = obj->yst_uid;
135 valid |= ATTR_UID;
136 attr->ia_gid = obj->yst_gid;
137 valid |= ATTR_GID;
138
139 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
140 valid |= ATTR_ATIME;
141 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
142 valid |= ATTR_CTIME;
143 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
144 valid |= ATTR_MTIME;
145
146 attr->ia_size = yaffs_get_file_size(obj);
147 valid |= ATTR_SIZE;
148
149 attr->ia_valid = valid;
150
151 return YAFFS_OK;
152 }
153