]>
Commit | Line | Data |
---|---|---|
8dfc8dbe GKH |
1 | /* |
2 | * udevdb.c | |
3 | * | |
4 | * Userspace devfs | |
5 | * | |
6 | * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com> | |
7 | * Copyright (C) 2003 IBM Corp. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation version 2 of the License. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | */ | |
23 | ||
8e41d35d DS |
24 | /* |
25 | * udev database library | |
26 | */ | |
d546791d | 27 | #define _KLIBC_HAS_ARCH_SIG_ATOMIC_T |
8e41d35d DS |
28 | #include <stdlib.h> |
29 | #include <stdio.h> | |
30 | #include <fcntl.h> | |
31 | #include <string.h> | |
32 | #include <sys/stat.h> | |
33 | #include <errno.h> | |
a2822451 | 34 | #include <signal.h> |
8e41d35d | 35 | |
6739707d GKH |
36 | #include "udev_version.h" |
37 | #include "udev.h" | |
54988802 | 38 | #include "logging.h" |
6739707d | 39 | #include "namedev.h" |
8e41d35d | 40 | #include "udevdb.h" |
a2822451 | 41 | #include "tdb/tdb.h" |
ca999860 | 42 | #include "libsysfs/libsysfs.h" |
8e41d35d | 43 | |
dbfc520c | 44 | static TDB_CONTEXT *udevdb; |
8e41d35d | 45 | |
ca999860 | 46 | |
5840bc63 | 47 | int udevdb_add_dev(const char *path, const struct udevice *dev) |
ca999860 GKH |
48 | { |
49 | TDB_DATA key, data; | |
5840bc63 | 50 | char keystr[SYSFS_PATH_MAX]; |
ca999860 | 51 | |
5840bc63 GKH |
52 | if ((path == NULL) || (dev == NULL)) |
53 | return -ENODEV; | |
ca999860 | 54 | |
5840bc63 | 55 | memset(keystr, 0, NAME_SIZE); |
ca999860 | 56 | strcpy(keystr, path); |
5840bc63 | 57 | key.dptr = keystr; |
ca999860 | 58 | key.dsize = strlen(keystr) + 1; |
f7b4eca4 | 59 | |
5840bc63 GKH |
60 | data.dptr = (void *)dev; |
61 | data.dsize = sizeof(*dev); | |
ca999860 | 62 | |
5840bc63 | 63 | return tdb_store(udevdb, key, data, TDB_REPLACE); |
ca999860 GKH |
64 | } |
65 | ||
a56ef382 | 66 | int udevdb_get_dev(const char *path, struct udevice *dev) |
8e41d35d DS |
67 | { |
68 | TDB_DATA key, data; | |
8e41d35d | 69 | |
5840bc63 | 70 | if (path == NULL) |
a56ef382 | 71 | return -ENODEV; |
8e41d35d | 72 | |
5840bc63 GKH |
73 | key.dptr = (void *)path; |
74 | key.dsize = strlen(path) + 1; | |
8e41d35d | 75 | |
dbfc520c | 76 | data = tdb_fetch(udevdb, key); |
8e41d35d | 77 | if (data.dptr == NULL || data.dsize == 0) |
a56ef382 | 78 | return -ENODEV; |
f7b4eca4 | 79 | |
5840bc63 | 80 | memcpy(dev, data.dptr, sizeof(*dev)); |
a56ef382 | 81 | return 0; |
8e41d35d DS |
82 | } |
83 | ||
5840bc63 | 84 | int udevdb_delete_dev(const char *path) |
8e41d35d DS |
85 | { |
86 | TDB_DATA key; | |
5840bc63 | 87 | char keystr[SYSFS_PATH_MAX]; |
8e41d35d | 88 | |
5840bc63 GKH |
89 | if (path == NULL) |
90 | return -EINVAL; | |
a9ce0a41 GKH |
91 | |
92 | memset(keystr, 0, sizeof(keystr)); | |
93 | strcpy(keystr, path); | |
94 | ||
95 | key.dptr = keystr; | |
96 | key.dsize = strlen(keystr) + 1; | |
f7b4eca4 | 97 | |
a9ce0a41 GKH |
98 | return tdb_delete(udevdb, key); |
99 | } | |
100 | ||
dbfc520c DS |
101 | /** |
102 | * udevdb_exit: closes database | |
103 | */ | |
104 | void udevdb_exit(void) | |
105 | { | |
5840bc63 GKH |
106 | if (udevdb != NULL) { |
107 | tdb_close(udevdb); | |
108 | udevdb = NULL; | |
109 | } | |
dbfc520c DS |
110 | } |
111 | ||
112 | /** | |
113 | * udevdb_init: initializes database | |
f7b4eca4 KS |
114 | * @init_flag: UDEVDB_INTERNAL - database stays in memory |
115 | * UDEVDB_DEFAULT - database is written to a file | |
dbfc520c DS |
116 | */ |
117 | int udevdb_init(int init_flag) | |
118 | { | |
119 | if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL) | |
5840bc63 | 120 | return -EINVAL; |
dbfc520c | 121 | |
c056c514 | 122 | udevdb = tdb_open(udev_db_filename, 0, init_flag, O_RDWR | O_CREAT, 0644); |
5840bc63 GKH |
123 | if (udevdb == NULL) { |
124 | if (init_flag == UDEVDB_INTERNAL) | |
f7b4eca4 | 125 | dbg("unable to initialize in-memory database"); |
5840bc63 | 126 | else |
f7b4eca4 | 127 | dbg("unable to initialize database at '%s'", udev_db_filename); |
ee1db00d | 128 | return -EACCES; |
5840bc63 GKH |
129 | } |
130 | return 0; | |
dbfc520c | 131 | } |
f4dc8d11 KS |
132 | |
133 | /** | |
4070d2fe | 134 | * udevdb_open_ro: open database for reading |
f4dc8d11 KS |
135 | */ |
136 | int udevdb_open_ro(void) | |
137 | { | |
138 | udevdb = tdb_open(udev_db_filename, 0, 0, O_RDONLY, 0); | |
139 | if (udevdb == NULL) { | |
140 | dbg("unable to open database at '%s'", udev_db_filename); | |
ee1db00d KS |
141 | return -EACCES; |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
146 | void (*user_record_callback) (char *path, struct udevice *dev); | |
147 | ||
148 | static int traverse_callback(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state) | |
149 | { | |
150 | user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | /** | |
155 | * udevdb_dump: dumps whole database by passing record data to user function | |
156 | * @user_record_handler: user function called for every record in the database | |
157 | */ | |
158 | int udevdb_dump(void (*user_record_handler) (char *path, struct udevice *dev)) | |
159 | { | |
160 | if (user_record_handler == NULL) { | |
161 | dbg("invalid user record handling function"); | |
f4dc8d11 KS |
162 | return -EINVAL; |
163 | } | |
ee1db00d KS |
164 | user_record_callback = user_record_handler; |
165 | tdb_traverse(udevdb, traverse_callback, NULL); | |
f4dc8d11 KS |
166 | return 0; |
167 | } |