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753ac610 CM |
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 | } |