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[u-boot] / fs / yaffs2 / yaffs_attribs.c
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
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
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
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
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
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
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
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 }