| Arve Hjønnevåg | 3de69a7 | 2010-05-18 20:35:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. |
| 3 | * |
| 4 | * Copyright (C) 2002-2010 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_guts.h" |
| 15 | #include "yaffs_attribs.h" |
| 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 | void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj) |
| 28 | { |
| 29 | oh->yst_uid = obj->yst_uid; |
| 30 | oh->yst_gid = obj->yst_gid; |
| 31 | oh->yst_atime = obj->yst_atime; |
| 32 | oh->yst_mtime = obj->yst_mtime; |
| 33 | oh->yst_ctime = obj->yst_ctime; |
| 34 | oh->yst_rdev = obj->yst_rdev; |
| 35 | |
| 36 | } |
| 37 | |
| 38 | void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c) |
| 39 | { |
| 40 | obj->yst_mtime = Y_CURRENT_TIME; |
| 41 | if (do_a) |
| 42 | obj->yst_atime = obj->yst_mtime; |
| 43 | if (do_c) |
| 44 | obj->yst_ctime = obj->yst_mtime; |
| 45 | } |
| 46 | |
| 47 | void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev) |
| 48 | { |
| 49 | yaffs_load_current_time(obj, 1, 1); |
| 50 | obj->yst_rdev = rdev; |
| 51 | obj->yst_uid = uid; |
| 52 | obj->yst_gid = gid; |
| 53 | } |
| 54 | |
| 55 | loff_t yaffs_get_file_size(struct yaffs_obj *obj) |
| 56 | { |
| 57 | YCHAR *alias = NULL; |
| 58 | obj = yaffs_get_equivalent_obj(obj); |
| 59 | |
| 60 | switch (obj->variant_type) { |
| 61 | case YAFFS_OBJECT_TYPE_FILE: |
| 62 | return obj->variant.file_variant.file_size; |
| 63 | case YAFFS_OBJECT_TYPE_SYMLINK: |
| 64 | alias = obj->variant.symlink_variant.alias; |
| 65 | if (!alias) |
| 66 | return 0; |
| 67 | return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH); |
| 68 | default: |
| 69 | return 0; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr) |
| 74 | { |
| 75 | unsigned int valid = attr->ia_valid; |
| 76 | |
| 77 | if (valid & ATTR_MODE) |
| 78 | obj->yst_mode = attr->ia_mode; |
| 79 | if (valid & ATTR_UID) |
| 80 | obj->yst_uid = attr->ia_uid; |
| 81 | if (valid & ATTR_GID) |
| 82 | obj->yst_gid = attr->ia_gid; |
| 83 | |
| 84 | if (valid & ATTR_ATIME) |
| 85 | obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); |
| 86 | if (valid & ATTR_CTIME) |
| 87 | obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); |
| 88 | if (valid & ATTR_MTIME) |
| 89 | obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); |
| 90 | |
| 91 | if (valid & ATTR_SIZE) |
| 92 | yaffs_resize_file(obj, attr->ia_size); |
| 93 | |
| 94 | yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); |
| 95 | |
| 96 | return YAFFS_OK; |
| 97 | |
| 98 | } |
| 99 | |
| 100 | int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr) |
| 101 | { |
| 102 | unsigned int valid = 0; |
| 103 | |
| 104 | attr->ia_mode = obj->yst_mode; |
| 105 | valid |= ATTR_MODE; |
| 106 | attr->ia_uid = obj->yst_uid; |
| 107 | valid |= ATTR_UID; |
| 108 | attr->ia_gid = obj->yst_gid; |
| 109 | valid |= ATTR_GID; |
| 110 | |
| 111 | Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; |
| 112 | valid |= ATTR_ATIME; |
| 113 | Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; |
| 114 | valid |= ATTR_CTIME; |
| 115 | Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; |
| 116 | valid |= ATTR_MTIME; |
| 117 | |
| 118 | attr->ia_size = yaffs_get_file_size(obj); |
| 119 | valid |= ATTR_SIZE; |
| 120 | |
| 121 | attr->ia_valid = valid; |
| 122 | |
| 123 | return YAFFS_OK; |
| 124 | } |