The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | /* |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 2 | * Copyright (C) 2007-2014 The Android Open Source Project |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <errno.h> |
Daniel Leung | c0c1ffe | 2012-07-02 11:32:30 -0700 | [diff] [blame] | 18 | #include <fnmatch.h> |
Olivier Bailly | b93e581 | 2010-11-17 11:47:23 -0800 | [diff] [blame] | 19 | #include <stddef.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <sys/stat.h> |
| 23 | #include <sys/types.h> |
| 24 | |
| 25 | #include <fcntl.h> |
| 26 | #include <dirent.h> |
| 27 | #include <unistd.h> |
| 28 | #include <string.h> |
| 29 | |
| 30 | #include <sys/socket.h> |
| 31 | #include <sys/un.h> |
| 32 | #include <linux/netlink.h> |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 33 | |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 34 | #include <selinux/selinux.h> |
| 35 | #include <selinux/label.h> |
Stephen Smalley | ae6f3d7 | 2012-05-01 15:02:53 -0400 | [diff] [blame] | 36 | #include <selinux/android.h> |
Stephen Smalley | e2eb69d | 2013-04-16 09:30:30 -0400 | [diff] [blame] | 37 | #include <selinux/avc.h> |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 38 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 39 | #include <private/android_filesystem_config.h> |
| 40 | #include <sys/time.h> |
Colin Cross | 982a815 | 2010-06-03 12:21:01 -0700 | [diff] [blame] | 41 | #include <sys/wait.h> |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 42 | |
Biao Lu | dc84856 | 2016-01-28 16:10:54 +0800 | [diff] [blame] | 43 | #include <android-base/file.h> |
Dima Zavin | da04c52 | 2011-09-01 17:09:44 -0700 | [diff] [blame] | 44 | #include <cutils/list.h> |
Vernon Tang | 3f582e9 | 2011-04-25 13:08:17 +1000 | [diff] [blame] | 45 | #include <cutils/uevent.h> |
| 46 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 47 | #include "devices.h" |
Greg Hackmann | 3312aa8 | 2013-11-18 15:24:40 -0800 | [diff] [blame] | 48 | #include "ueventd_parser.h" |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 49 | #include "util.h" |
Colin Cross | ed8a7d8 | 2010-04-19 17:05:34 -0700 | [diff] [blame] | 50 | #include "log.h" |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 51 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 52 | #define SYSFS_PREFIX "/sys" |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 53 | static const char *firmware_dirs[] = { "/etc/firmware", |
| 54 | "/vendor/firmware", |
| 55 | "/firmware/image" }; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 56 | |
Stephen Smalley | e096e36 | 2012-06-11 13:37:39 -0400 | [diff] [blame] | 57 | extern struct selabel_handle *sehandle; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 58 | |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 59 | static int device_fd = -1; |
| 60 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 61 | struct uevent { |
| 62 | const char *action; |
| 63 | const char *path; |
| 64 | const char *subsystem; |
| 65 | const char *firmware; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 66 | const char *partition_name; |
Wei Zhong | f97b887 | 2012-03-23 14:15:34 -0700 | [diff] [blame] | 67 | const char *device_name; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 68 | int partition_num; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 69 | int major; |
| 70 | int minor; |
| 71 | }; |
| 72 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 73 | struct perms_ { |
| 74 | char *name; |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 75 | char *attr; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 76 | mode_t perm; |
| 77 | unsigned int uid; |
| 78 | unsigned int gid; |
| 79 | unsigned short prefix; |
Daniel Leung | c0c1ffe | 2012-07-02 11:32:30 -0700 | [diff] [blame] | 80 | unsigned short wildcard; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 81 | }; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 82 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 83 | struct perm_node { |
| 84 | struct perms_ dp; |
| 85 | struct listnode plist; |
| 86 | }; |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 87 | |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 88 | struct platform_node { |
| 89 | char *name; |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 90 | char *path; |
| 91 | int path_len; |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 92 | struct listnode list; |
| 93 | }; |
| 94 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 95 | static list_declare(sys_perms); |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 96 | static list_declare(dev_perms); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 97 | static list_declare(platform_names); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 98 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 99 | int add_dev_perms(const char *name, const char *attr, |
| 100 | mode_t perm, unsigned int uid, unsigned int gid, |
Daniel Leung | c0c1ffe | 2012-07-02 11:32:30 -0700 | [diff] [blame] | 101 | unsigned short prefix, |
| 102 | unsigned short wildcard) { |
Elliott Hughes | f3cf438 | 2015-02-03 17:12:07 -0800 | [diff] [blame] | 103 | struct perm_node *node = (perm_node*) calloc(1, sizeof(*node)); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 104 | if (!node) |
| 105 | return -ENOMEM; |
| 106 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 107 | node->dp.name = strdup(name); |
| 108 | if (!node->dp.name) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 109 | return -ENOMEM; |
| 110 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 111 | if (attr) { |
| 112 | node->dp.attr = strdup(attr); |
| 113 | if (!node->dp.attr) |
| 114 | return -ENOMEM; |
| 115 | } |
| 116 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 117 | node->dp.perm = perm; |
| 118 | node->dp.uid = uid; |
| 119 | node->dp.gid = gid; |
| 120 | node->dp.prefix = prefix; |
Daniel Leung | c0c1ffe | 2012-07-02 11:32:30 -0700 | [diff] [blame] | 121 | node->dp.wildcard = wildcard; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 122 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 123 | if (attr) |
| 124 | list_add_tail(&sys_perms, &node->plist); |
| 125 | else |
| 126 | list_add_tail(&dev_perms, &node->plist); |
| 127 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 128 | return 0; |
| 129 | } |
| 130 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 131 | void fixup_sys_perms(const char *upath) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 132 | { |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 133 | char buf[512]; |
| 134 | struct listnode *node; |
| 135 | struct perms_ *dp; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 136 | |
Nick Kralevich | 3b4c0bd | 2014-07-03 16:04:34 -0700 | [diff] [blame] | 137 | /* upaths omit the "/sys" that paths in this list |
| 138 | * contain, so we add 4 when comparing... |
| 139 | */ |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 140 | list_for_each(node, &sys_perms) { |
| 141 | dp = &(node_to_item(node, struct perm_node, plist))->dp; |
| 142 | if (dp->prefix) { |
| 143 | if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 144 | continue; |
Daniel Leung | c0c1ffe | 2012-07-02 11:32:30 -0700 | [diff] [blame] | 145 | } else if (dp->wildcard) { |
| 146 | if (fnmatch(dp->name + 4, upath, FNM_PATHNAME) != 0) |
| 147 | continue; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 148 | } else { |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 149 | if (strcmp(upath, dp->name + 4)) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 150 | continue; |
| 151 | } |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 152 | |
| 153 | if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) |
Nick Kralevich | 3b4c0bd | 2014-07-03 16:04:34 -0700 | [diff] [blame] | 154 | break; |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 155 | |
Yabin Cui | e2d63af | 2015-02-17 19:27:51 -0800 | [diff] [blame] | 156 | snprintf(buf, sizeof(buf), "/sys%s/%s", upath, dp->attr); |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 157 | INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); |
| 158 | chown(buf, dp->uid, dp->gid); |
| 159 | chmod(buf, dp->perm); |
Nick Kralevich | 3b4c0bd | 2014-07-03 16:04:34 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | // Now fixup SELinux file labels |
| 163 | int len = snprintf(buf, sizeof(buf), "/sys%s", upath); |
| 164 | if ((len < 0) || ((size_t) len >= sizeof(buf))) { |
| 165 | // Overflow |
| 166 | return; |
| 167 | } |
| 168 | if (access(buf, F_OK) == 0) { |
| 169 | INFO("restorecon_recursive: %s\n", buf); |
| 170 | restorecon_recursive(buf); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 171 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Colin Cross | 43d537e | 2014-07-02 13:08:13 -0700 | [diff] [blame] | 174 | static bool perm_path_matches(const char *path, struct perms_ *dp) |
| 175 | { |
| 176 | if (dp->prefix) { |
| 177 | if (strncmp(path, dp->name, strlen(dp->name)) == 0) |
| 178 | return true; |
| 179 | } else if (dp->wildcard) { |
| 180 | if (fnmatch(dp->name, path, FNM_PATHNAME) == 0) |
| 181 | return true; |
| 182 | } else { |
| 183 | if (strcmp(path, dp->name) == 0) |
| 184 | return true; |
| 185 | } |
| 186 | |
| 187 | return false; |
| 188 | } |
| 189 | |
| 190 | static mode_t get_device_perm(const char *path, const char **links, |
| 191 | unsigned *uid, unsigned *gid) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 192 | { |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 193 | struct listnode *node; |
| 194 | struct perm_node *perm_node; |
| 195 | struct perms_ *dp; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 196 | |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 197 | /* search the perms list in reverse so that ueventd.$hardware can |
| 198 | * override ueventd.rc |
| 199 | */ |
| 200 | list_for_each_reverse(node, &dev_perms) { |
Colin Cross | 43d537e | 2014-07-02 13:08:13 -0700 | [diff] [blame] | 201 | bool match = false; |
| 202 | |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 203 | perm_node = node_to_item(node, struct perm_node, plist); |
| 204 | dp = &perm_node->dp; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 205 | |
Colin Cross | 43d537e | 2014-07-02 13:08:13 -0700 | [diff] [blame] | 206 | if (perm_path_matches(path, dp)) { |
| 207 | match = true; |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 208 | } else { |
Colin Cross | 43d537e | 2014-07-02 13:08:13 -0700 | [diff] [blame] | 209 | if (links) { |
| 210 | int i; |
| 211 | for (i = 0; links[i]; i++) { |
| 212 | if (perm_path_matches(links[i], dp)) { |
| 213 | match = true; |
| 214 | break; |
| 215 | } |
| 216 | } |
| 217 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 218 | } |
Colin Cross | 43d537e | 2014-07-02 13:08:13 -0700 | [diff] [blame] | 219 | |
| 220 | if (match) { |
| 221 | *uid = dp->uid; |
| 222 | *gid = dp->gid; |
| 223 | return dp->perm; |
| 224 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 225 | } |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 226 | /* Default if nothing found. */ |
| 227 | *uid = 0; |
| 228 | *gid = 0; |
| 229 | return 0600; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 230 | } |
| 231 | |
Brian Swetland | bc57d4c | 2010-10-26 15:09:43 -0700 | [diff] [blame] | 232 | static void make_device(const char *path, |
Elliott Hughes | f682b47 | 2015-02-06 12:19:48 -0800 | [diff] [blame] | 233 | const char */*upath*/, |
Stephen Smalley | b4c5200 | 2014-06-12 12:29:14 -0400 | [diff] [blame] | 234 | int block, int major, int minor, |
| 235 | const char **links) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 236 | { |
| 237 | unsigned uid; |
| 238 | unsigned gid; |
| 239 | mode_t mode; |
| 240 | dev_t dev; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 241 | char *secontext = NULL; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 242 | |
Colin Cross | 43d537e | 2014-07-02 13:08:13 -0700 | [diff] [blame] | 243 | mode = get_device_perm(path, links, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); |
Kenny Root | b5982bf | 2012-10-16 23:07:05 -0700 | [diff] [blame] | 244 | |
Mihai Serban | 721c9ce | 2016-04-25 18:22:27 +0300 | [diff] [blame] | 245 | if (selabel_lookup_best_match(sehandle, &secontext, path, links, mode)) { |
| 246 | ERROR("Device '%s' not created; cannot find SELinux label (%s)\n", |
| 247 | path, strerror(errno)); |
| 248 | return; |
| 249 | } |
Nick Kralevich | 4d87095 | 2015-06-12 22:03:50 -0700 | [diff] [blame] | 250 | setfscreatecon(secontext); |
Kenny Root | b5982bf | 2012-10-16 23:07:05 -0700 | [diff] [blame] | 251 | |
Colin Cross | 17dcc5c | 2010-09-03 12:25:34 -0700 | [diff] [blame] | 252 | dev = makedev(major, minor); |
Nick Pelly | 6405c69 | 2010-01-21 18:13:39 -0800 | [diff] [blame] | 253 | /* Temporarily change egid to avoid race condition setting the gid of the |
| 254 | * device node. Unforunately changing the euid would prevent creation of |
| 255 | * some device nodes, so the uid has to be set with chown() and is still |
| 256 | * racy. Fixing the gid race at least fixed the issue with system_server |
| 257 | * opening dynamic input devices under the AID_INPUT gid. */ |
| 258 | setegid(gid); |
Mihai Serban | 721c9ce | 2016-04-25 18:22:27 +0300 | [diff] [blame] | 259 | /* If the node already exists update its SELinux label to handle cases when |
| 260 | * it was created with the wrong context during coldboot procedure. */ |
| 261 | if (mknod(path, mode, dev) && (errno == EEXIST)) { |
| 262 | if (lsetfilecon(path, secontext)) { |
| 263 | ERROR("Cannot set '%s' SELinux label on '%s' device (%s)\n", |
| 264 | secontext, path, strerror(errno)); |
| 265 | } |
| 266 | } |
Nick Pelly | 6405c69 | 2010-01-21 18:13:39 -0800 | [diff] [blame] | 267 | chown(path, uid, -1); |
| 268 | setegid(AID_ROOT); |
Kenny Root | b5982bf | 2012-10-16 23:07:05 -0700 | [diff] [blame] | 269 | |
Mihai Serban | 721c9ce | 2016-04-25 18:22:27 +0300 | [diff] [blame] | 270 | freecon(secontext); |
| 271 | setfscreatecon(NULL); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 272 | } |
| 273 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 274 | static void add_platform_device(const char *path) |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 275 | { |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 276 | int path_len = strlen(path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 277 | struct platform_node *bus; |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 278 | const char *name = path; |
| 279 | |
| 280 | if (!strncmp(path, "/devices/", 9)) { |
| 281 | name += 9; |
| 282 | if (!strncmp(name, "platform/", 9)) |
| 283 | name += 9; |
| 284 | } |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 285 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 286 | INFO("adding platform device %s (%s)\n", name, path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 287 | |
Elliott Hughes | f3cf438 | 2015-02-03 17:12:07 -0800 | [diff] [blame] | 288 | bus = (platform_node*) calloc(1, sizeof(struct platform_node)); |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 289 | bus->path = strdup(path); |
| 290 | bus->path_len = path_len; |
| 291 | bus->name = bus->path + (name - path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 292 | list_add_tail(&platform_names, &bus->list); |
| 293 | } |
| 294 | |
| 295 | /* |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 296 | * given a path that may start with a platform device, find the length of the |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 297 | * platform device prefix. If it doesn't start with a platform device, return |
| 298 | * 0. |
| 299 | */ |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 300 | static struct platform_node *find_platform_device(const char *path) |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 301 | { |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 302 | int path_len = strlen(path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 303 | struct listnode *node; |
| 304 | struct platform_node *bus; |
| 305 | |
| 306 | list_for_each_reverse(node, &platform_names) { |
| 307 | bus = node_to_item(node, struct platform_node, list); |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 308 | if ((bus->path_len < path_len) && |
| 309 | (path[bus->path_len] == '/') && |
| 310 | !strncmp(path, bus->path, bus->path_len)) |
| 311 | return bus; |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | return NULL; |
| 315 | } |
| 316 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 317 | static void remove_platform_device(const char *path) |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 318 | { |
| 319 | struct listnode *node; |
| 320 | struct platform_node *bus; |
| 321 | |
| 322 | list_for_each_reverse(node, &platform_names) { |
| 323 | bus = node_to_item(node, struct platform_node, list); |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 324 | if (!strcmp(path, bus->path)) { |
| 325 | INFO("removing platform device %s\n", bus->name); |
| 326 | free(bus->path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 327 | list_remove(node); |
| 328 | free(bus); |
| 329 | return; |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 334 | /* Given a path that may start with a PCI device, populate the supplied buffer |
| 335 | * with the PCI domain/bus number and the peripheral ID and return 0. |
| 336 | * If it doesn't start with a PCI device, or there is some error, return -1 */ |
| 337 | static int find_pci_device_prefix(const char *path, char *buf, ssize_t buf_sz) |
| 338 | { |
| 339 | const char *start, *end; |
| 340 | |
| 341 | if (strncmp(path, "/devices/pci", 12)) |
| 342 | return -1; |
| 343 | |
| 344 | /* Beginning of the prefix is the initial "pci" after "/devices/" */ |
| 345 | start = path + 9; |
| 346 | |
| 347 | /* End of the prefix is two path '/' later, capturing the domain/bus number |
| 348 | * and the peripheral ID. Example: pci0000:00/0000:00:1f.2 */ |
| 349 | end = strchr(start, '/'); |
| 350 | if (!end) |
| 351 | return -1; |
| 352 | end = strchr(end + 1, '/'); |
| 353 | if (!end) |
| 354 | return -1; |
| 355 | |
| 356 | /* Make sure we have enough room for the string plus null terminator */ |
| 357 | if (end - start + 1 > buf_sz) |
| 358 | return -1; |
| 359 | |
| 360 | strncpy(buf, start, end - start); |
| 361 | buf[end - start] = '\0'; |
| 362 | return 0; |
| 363 | } |
| 364 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 365 | static void parse_event(const char *msg, struct uevent *uevent) |
| 366 | { |
| 367 | uevent->action = ""; |
| 368 | uevent->path = ""; |
| 369 | uevent->subsystem = ""; |
| 370 | uevent->firmware = ""; |
| 371 | uevent->major = -1; |
| 372 | uevent->minor = -1; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 373 | uevent->partition_name = NULL; |
| 374 | uevent->partition_num = -1; |
Wei Zhong | f97b887 | 2012-03-23 14:15:34 -0700 | [diff] [blame] | 375 | uevent->device_name = NULL; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 376 | |
| 377 | /* currently ignoring SEQNUM */ |
| 378 | while(*msg) { |
| 379 | if(!strncmp(msg, "ACTION=", 7)) { |
| 380 | msg += 7; |
| 381 | uevent->action = msg; |
| 382 | } else if(!strncmp(msg, "DEVPATH=", 8)) { |
| 383 | msg += 8; |
| 384 | uevent->path = msg; |
| 385 | } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { |
| 386 | msg += 10; |
| 387 | uevent->subsystem = msg; |
| 388 | } else if(!strncmp(msg, "FIRMWARE=", 9)) { |
| 389 | msg += 9; |
| 390 | uevent->firmware = msg; |
| 391 | } else if(!strncmp(msg, "MAJOR=", 6)) { |
| 392 | msg += 6; |
| 393 | uevent->major = atoi(msg); |
| 394 | } else if(!strncmp(msg, "MINOR=", 6)) { |
| 395 | msg += 6; |
| 396 | uevent->minor = atoi(msg); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 397 | } else if(!strncmp(msg, "PARTN=", 6)) { |
| 398 | msg += 6; |
| 399 | uevent->partition_num = atoi(msg); |
| 400 | } else if(!strncmp(msg, "PARTNAME=", 9)) { |
| 401 | msg += 9; |
| 402 | uevent->partition_name = msg; |
Wei Zhong | f97b887 | 2012-03-23 14:15:34 -0700 | [diff] [blame] | 403 | } else if(!strncmp(msg, "DEVNAME=", 8)) { |
| 404 | msg += 8; |
| 405 | uevent->device_name = msg; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 406 | } |
| 407 | |
Wei Zhong | f97b887 | 2012-03-23 14:15:34 -0700 | [diff] [blame] | 408 | /* advance to after the next \0 */ |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 409 | while(*msg++) |
| 410 | ; |
| 411 | } |
| 412 | |
Elliott Hughes | c0e919c | 2015-02-04 14:46:36 -0800 | [diff] [blame] | 413 | if (LOG_UEVENTS) { |
| 414 | INFO("event { '%s', '%s', '%s', '%s', %d, %d }\n", |
| 415 | uevent->action, uevent->path, uevent->subsystem, |
| 416 | uevent->firmware, uevent->major, uevent->minor); |
| 417 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Benoit Goby | d227863 | 2010-08-03 14:36:02 -0700 | [diff] [blame] | 420 | static char **get_character_device_symlinks(struct uevent *uevent) |
| 421 | { |
| 422 | const char *parent; |
| 423 | char *slash; |
| 424 | char **links; |
| 425 | int link_num = 0; |
| 426 | int width; |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 427 | struct platform_node *pdev; |
Benoit Goby | d227863 | 2010-08-03 14:36:02 -0700 | [diff] [blame] | 428 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 429 | pdev = find_platform_device(uevent->path); |
| 430 | if (!pdev) |
Benoit Goby | d227863 | 2010-08-03 14:36:02 -0700 | [diff] [blame] | 431 | return NULL; |
| 432 | |
Elliott Hughes | f3cf438 | 2015-02-03 17:12:07 -0800 | [diff] [blame] | 433 | links = (char**) malloc(sizeof(char *) * 2); |
Benoit Goby | d227863 | 2010-08-03 14:36:02 -0700 | [diff] [blame] | 434 | if (!links) |
| 435 | return NULL; |
| 436 | memset(links, 0, sizeof(char *) * 2); |
| 437 | |
| 438 | /* skip "/devices/platform/<driver>" */ |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 439 | parent = strchr(uevent->path + pdev->path_len, '/'); |
Tomasz Kondel | fca58f4 | 2013-11-05 13:17:45 +0100 | [diff] [blame] | 440 | if (!parent) |
Benoit Goby | d227863 | 2010-08-03 14:36:02 -0700 | [diff] [blame] | 441 | goto err; |
| 442 | |
| 443 | if (!strncmp(parent, "/usb", 4)) { |
| 444 | /* skip root hub name and device. use device interface */ |
| 445 | while (*++parent && *parent != '/'); |
| 446 | if (*parent) |
| 447 | while (*++parent && *parent != '/'); |
| 448 | if (!*parent) |
| 449 | goto err; |
| 450 | slash = strchr(++parent, '/'); |
| 451 | if (!slash) |
| 452 | goto err; |
| 453 | width = slash - parent; |
| 454 | if (width <= 0) |
| 455 | goto err; |
| 456 | |
| 457 | if (asprintf(&links[link_num], "/dev/usb/%s%.*s", uevent->subsystem, width, parent) > 0) |
| 458 | link_num++; |
| 459 | else |
| 460 | links[link_num] = NULL; |
| 461 | mkdir("/dev/usb", 0755); |
| 462 | } |
| 463 | else { |
| 464 | goto err; |
| 465 | } |
| 466 | |
| 467 | return links; |
| 468 | err: |
| 469 | free(links); |
| 470 | return NULL; |
| 471 | } |
| 472 | |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 473 | static char **get_block_device_symlinks(struct uevent *uevent) |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 474 | { |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 475 | const char *device; |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 476 | struct platform_node *pdev; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 477 | char *slash; |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 478 | const char *type; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 479 | char buf[256]; |
| 480 | char link_path[256]; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 481 | int link_num = 0; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 482 | char *p; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 483 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 484 | pdev = find_platform_device(uevent->path); |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 485 | if (pdev) { |
| 486 | device = pdev->name; |
| 487 | type = "platform"; |
| 488 | } else if (!find_pci_device_prefix(uevent->path, buf, sizeof(buf))) { |
| 489 | device = buf; |
| 490 | type = "pci"; |
| 491 | } else { |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 492 | return NULL; |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 493 | } |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 494 | |
Elliott Hughes | f3cf438 | 2015-02-03 17:12:07 -0800 | [diff] [blame] | 495 | char **links = (char**) malloc(sizeof(char *) * 4); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 496 | if (!links) |
| 497 | return NULL; |
| 498 | memset(links, 0, sizeof(char *) * 4); |
| 499 | |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 500 | INFO("found %s device %s\n", type, device); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 501 | |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 502 | snprintf(link_path, sizeof(link_path), "/dev/block/%s/%s", type, device); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 503 | |
| 504 | if (uevent->partition_name) { |
| 505 | p = strdup(uevent->partition_name); |
| 506 | sanitize(p); |
Johan Redestig | 93ca79b | 2012-04-18 16:41:19 +0200 | [diff] [blame] | 507 | if (strcmp(uevent->partition_name, p)) |
| 508 | NOTICE("Linking partition '%s' as '%s'\n", uevent->partition_name, p); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 509 | if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) |
| 510 | link_num++; |
| 511 | else |
| 512 | links[link_num] = NULL; |
| 513 | free(p); |
| 514 | } |
| 515 | |
| 516 | if (uevent->partition_num >= 0) { |
| 517 | if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) |
| 518 | link_num++; |
| 519 | else |
| 520 | links[link_num] = NULL; |
| 521 | } |
| 522 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 523 | slash = strrchr(uevent->path, '/'); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 524 | if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) |
| 525 | link_num++; |
| 526 | else |
| 527 | links[link_num] = NULL; |
| 528 | |
| 529 | return links; |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 530 | } |
| 531 | |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 532 | static void handle_device(const char *action, const char *devpath, |
| 533 | const char *path, int block, int major, int minor, char **links) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 534 | { |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 535 | int i; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 536 | |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 537 | if(!strcmp(action, "add")) { |
Stephen Smalley | b4c5200 | 2014-06-12 12:29:14 -0400 | [diff] [blame] | 538 | make_device(devpath, path, block, major, minor, (const char **)links); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 539 | if (links) { |
| 540 | for (i = 0; links[i]; i++) |
Chris Fries | 79f3384 | 2013-09-05 13:19:21 -0500 | [diff] [blame] | 541 | make_link_init(devpath, links[i]); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 542 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 545 | if(!strcmp(action, "remove")) { |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 546 | if (links) { |
| 547 | for (i = 0; links[i]; i++) |
| 548 | remove_link(devpath, links[i]); |
| 549 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 550 | unlink(devpath); |
Colin Cross | b0ab94b | 2010-04-08 16:16:20 -0700 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | if (links) { |
| 554 | for (i = 0; links[i]; i++) |
| 555 | free(links[i]); |
| 556 | free(links); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 557 | } |
| 558 | } |
| 559 | |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 560 | static void handle_platform_device_event(struct uevent *uevent) |
| 561 | { |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 562 | const char *path = uevent->path; |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 563 | |
| 564 | if (!strcmp(uevent->action, "add")) |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 565 | add_platform_device(path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 566 | else if (!strcmp(uevent->action, "remove")) |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 567 | remove_platform_device(path); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 568 | } |
| 569 | |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 570 | static const char *parse_device_name(struct uevent *uevent, unsigned int len) |
| 571 | { |
| 572 | const char *name; |
| 573 | |
| 574 | /* if it's not a /dev device, nothing else to do */ |
| 575 | if((uevent->major < 0) || (uevent->minor < 0)) |
| 576 | return NULL; |
| 577 | |
| 578 | /* do we have a name? */ |
| 579 | name = strrchr(uevent->path, '/'); |
| 580 | if(!name) |
| 581 | return NULL; |
| 582 | name++; |
| 583 | |
| 584 | /* too-long names would overrun our buffer */ |
Greg Hackmann | f6e009e | 2013-11-21 13:26:48 -0800 | [diff] [blame] | 585 | if(strlen(name) > len) { |
| 586 | ERROR("DEVPATH=%s exceeds %u-character limit on filename; ignoring event\n", |
| 587 | name, len); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 588 | return NULL; |
Greg Hackmann | f6e009e | 2013-11-21 13:26:48 -0800 | [diff] [blame] | 589 | } |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 590 | |
| 591 | return name; |
| 592 | } |
| 593 | |
| 594 | static void handle_block_device_event(struct uevent *uevent) |
| 595 | { |
| 596 | const char *base = "/dev/block/"; |
| 597 | const char *name; |
| 598 | char devpath[96]; |
| 599 | char **links = NULL; |
| 600 | |
| 601 | name = parse_device_name(uevent, 64); |
| 602 | if (!name) |
| 603 | return; |
| 604 | |
| 605 | snprintf(devpath, sizeof(devpath), "%s%s", base, name); |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 606 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 607 | |
Dima Zavin | f395c92 | 2013-03-06 16:23:57 -0800 | [diff] [blame] | 608 | if (!strncmp(uevent->path, "/devices/", 9)) |
Andrew Boie | a885d04 | 2013-09-13 17:41:20 -0700 | [diff] [blame] | 609 | links = get_block_device_symlinks(uevent); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 610 | |
| 611 | handle_device(uevent->action, devpath, uevent->path, 1, |
| 612 | uevent->major, uevent->minor, links); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Greg Hackmann | 3312aa8 | 2013-11-18 15:24:40 -0800 | [diff] [blame] | 615 | #define DEVPATH_LEN 96 |
| 616 | |
| 617 | static bool assemble_devpath(char *devpath, const char *dirname, |
| 618 | const char *devname) |
| 619 | { |
| 620 | int s = snprintf(devpath, DEVPATH_LEN, "%s/%s", dirname, devname); |
| 621 | if (s < 0) { |
| 622 | ERROR("failed to assemble device path (%s); ignoring event\n", |
| 623 | strerror(errno)); |
| 624 | return false; |
| 625 | } else if (s >= DEVPATH_LEN) { |
| 626 | ERROR("%s/%s exceeds %u-character limit on path; ignoring event\n", |
| 627 | dirname, devname, DEVPATH_LEN); |
| 628 | return false; |
| 629 | } |
| 630 | return true; |
| 631 | } |
| 632 | |
| 633 | static void mkdir_recursive_for_devpath(const char *devpath) |
| 634 | { |
| 635 | char dir[DEVPATH_LEN]; |
| 636 | char *slash; |
| 637 | |
| 638 | strcpy(dir, devpath); |
| 639 | slash = strrchr(dir, '/'); |
| 640 | *slash = '\0'; |
| 641 | mkdir_recursive(dir, 0755); |
| 642 | } |
| 643 | |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 644 | static void handle_generic_device_event(struct uevent *uevent) |
| 645 | { |
Elliott Hughes | f3cf438 | 2015-02-03 17:12:07 -0800 | [diff] [blame] | 646 | const char *base; |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 647 | const char *name; |
Greg Hackmann | 3312aa8 | 2013-11-18 15:24:40 -0800 | [diff] [blame] | 648 | char devpath[DEVPATH_LEN] = {0}; |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 649 | char **links = NULL; |
| 650 | |
| 651 | name = parse_device_name(uevent, 64); |
| 652 | if (!name) |
| 653 | return; |
| 654 | |
Greg Hackmann | 3312aa8 | 2013-11-18 15:24:40 -0800 | [diff] [blame] | 655 | struct ueventd_subsystem *subsystem = |
| 656 | ueventd_subsystem_find_by_name(uevent->subsystem); |
| 657 | |
| 658 | if (subsystem) { |
| 659 | const char *devname; |
| 660 | |
| 661 | switch (subsystem->devname_src) { |
| 662 | case DEVNAME_UEVENT_DEVNAME: |
| 663 | devname = uevent->device_name; |
| 664 | break; |
| 665 | |
| 666 | case DEVNAME_UEVENT_DEVPATH: |
| 667 | devname = name; |
| 668 | break; |
| 669 | |
| 670 | default: |
| 671 | ERROR("%s subsystem's devpath option is not set; ignoring event\n", |
| 672 | uevent->subsystem); |
| 673 | return; |
| 674 | } |
| 675 | |
| 676 | if (!assemble_devpath(devpath, subsystem->dirname, devname)) |
| 677 | return; |
| 678 | mkdir_recursive_for_devpath(devpath); |
| 679 | } else if (!strncmp(uevent->subsystem, "usb", 3)) { |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 680 | if (!strcmp(uevent->subsystem, "usb")) { |
Wei Zhong | f97b887 | 2012-03-23 14:15:34 -0700 | [diff] [blame] | 681 | if (uevent->device_name) { |
Greg Hackmann | 3312aa8 | 2013-11-18 15:24:40 -0800 | [diff] [blame] | 682 | if (!assemble_devpath(devpath, "/dev", uevent->device_name)) |
Greg Hackmann | f6e009e | 2013-11-21 13:26:48 -0800 | [diff] [blame] | 683 | return; |
Greg Hackmann | 3312aa8 | 2013-11-18 15:24:40 -0800 | [diff] [blame] | 684 | mkdir_recursive_for_devpath(devpath); |
Wei Zhong | f97b887 | 2012-03-23 14:15:34 -0700 | [diff] [blame] | 685 | } |
| 686 | else { |
| 687 | /* This imitates the file system that would be created |
| 688 | * if we were using devfs instead. |
| 689 | * Minors are broken up into groups of 128, starting at "001" |
| 690 | */ |
| 691 | int bus_id = uevent->minor / 128 + 1; |
| 692 | int device_id = uevent->minor % 128 + 1; |
| 693 | /* build directories */ |
| 694 | make_dir("/dev/bus", 0755); |
| 695 | make_dir("/dev/bus/usb", 0755); |
| 696 | snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); |
| 697 | make_dir(devpath, 0755); |
| 698 | snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); |
| 699 | } |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 700 | } else { |
| 701 | /* ignore other USB events */ |
| 702 | return; |
| 703 | } |
| 704 | } else if (!strncmp(uevent->subsystem, "graphics", 8)) { |
| 705 | base = "/dev/graphics/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 706 | make_dir(base, 0755); |
Lukasz Anaczkowski | e6f8d45 | 2011-09-28 15:30:07 +0200 | [diff] [blame] | 707 | } else if (!strncmp(uevent->subsystem, "drm", 3)) { |
| 708 | base = "/dev/dri/"; |
| 709 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 710 | } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { |
| 711 | base = "/dev/oncrpc/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 712 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 713 | } else if (!strncmp(uevent->subsystem, "adsp", 4)) { |
| 714 | base = "/dev/adsp/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 715 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 716 | } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { |
| 717 | base = "/dev/msm_camera/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 718 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 719 | } else if(!strncmp(uevent->subsystem, "input", 5)) { |
| 720 | base = "/dev/input/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 721 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 722 | } else if(!strncmp(uevent->subsystem, "mtd", 3)) { |
| 723 | base = "/dev/mtd/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 724 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 725 | } else if(!strncmp(uevent->subsystem, "sound", 5)) { |
| 726 | base = "/dev/snd/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 727 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 728 | } else if(!strncmp(uevent->subsystem, "misc", 4) && |
| 729 | !strncmp(name, "log_", 4)) { |
Elliott Hughes | f682b47 | 2015-02-06 12:19:48 -0800 | [diff] [blame] | 730 | INFO("kernel logger is deprecated\n"); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 731 | base = "/dev/log/"; |
Stephen Smalley | e46f9d5 | 2012-01-13 08:48:47 -0500 | [diff] [blame] | 732 | make_dir(base, 0755); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 733 | name += 4; |
| 734 | } else |
| 735 | base = "/dev/"; |
| 736 | links = get_character_device_symlinks(uevent); |
| 737 | |
| 738 | if (!devpath[0]) |
| 739 | snprintf(devpath, sizeof(devpath), "%s%s", base, name); |
| 740 | |
| 741 | handle_device(uevent->action, devpath, uevent->path, 0, |
| 742 | uevent->major, uevent->minor, links); |
| 743 | } |
| 744 | |
| 745 | static void handle_device_event(struct uevent *uevent) |
| 746 | { |
Ruchi Kandoi | 75b287b | 2014-04-29 19:14:37 -0700 | [diff] [blame] | 747 | if (!strcmp(uevent->action,"add") || !strcmp(uevent->action, "change") || !strcmp(uevent->action, "online")) |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 748 | fixup_sys_perms(uevent->path); |
| 749 | |
| 750 | if (!strncmp(uevent->subsystem, "block", 5)) { |
| 751 | handle_block_device_event(uevent); |
Colin Cross | fadb85e | 2011-03-30 18:32:12 -0700 | [diff] [blame] | 752 | } else if (!strncmp(uevent->subsystem, "platform", 8)) { |
| 753 | handle_platform_device_event(uevent); |
Colin Cross | eb5ba83 | 2011-03-30 17:37:17 -0700 | [diff] [blame] | 754 | } else { |
| 755 | handle_generic_device_event(uevent); |
| 756 | } |
| 757 | } |
| 758 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 759 | static int load_firmware(int fw_fd, int loading_fd, int data_fd) |
| 760 | { |
| 761 | struct stat st; |
| 762 | long len_to_copy; |
| 763 | int ret = 0; |
| 764 | |
| 765 | if(fstat(fw_fd, &st) < 0) |
| 766 | return -1; |
| 767 | len_to_copy = st.st_size; |
| 768 | |
| 769 | write(loading_fd, "1", 1); /* start transfer */ |
| 770 | |
| 771 | while (len_to_copy > 0) { |
| 772 | char buf[PAGE_SIZE]; |
| 773 | ssize_t nr; |
| 774 | |
| 775 | nr = read(fw_fd, buf, sizeof(buf)); |
| 776 | if(!nr) |
| 777 | break; |
| 778 | if(nr < 0) { |
| 779 | ret = -1; |
| 780 | break; |
| 781 | } |
Biao Lu | dc84856 | 2016-01-28 16:10:54 +0800 | [diff] [blame] | 782 | if (!android::base::WriteFully(data_fd, buf, nr)) { |
| 783 | ret = -1; |
| 784 | break; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 785 | } |
Biao Lu | dc84856 | 2016-01-28 16:10:54 +0800 | [diff] [blame] | 786 | len_to_copy -= nr; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 787 | } |
| 788 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 789 | if(!ret) |
| 790 | write(loading_fd, "0", 1); /* successful end of transfer */ |
| 791 | else |
| 792 | write(loading_fd, "-1", 2); /* abort transfer */ |
| 793 | |
| 794 | return ret; |
| 795 | } |
| 796 | |
Brian Swetland | 8d48c8e | 2011-03-24 15:45:30 -0700 | [diff] [blame] | 797 | static int is_booting(void) |
| 798 | { |
| 799 | return access("/dev/.booting", F_OK) == 0; |
| 800 | } |
| 801 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 802 | static void process_firmware_event(struct uevent *uevent) |
| 803 | { |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 804 | char *root, *loading, *data; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 805 | int l, loading_fd, data_fd, fw_fd; |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 806 | size_t i; |
Brian Swetland | 8d48c8e | 2011-03-24 15:45:30 -0700 | [diff] [blame] | 807 | int booting = is_booting(); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 808 | |
Brian Swetland | 8d48c8e | 2011-03-24 15:45:30 -0700 | [diff] [blame] | 809 | INFO("firmware: loading '%s' for '%s'\n", |
| 810 | uevent->firmware, uevent->path); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 811 | |
| 812 | l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); |
| 813 | if (l == -1) |
| 814 | return; |
| 815 | |
| 816 | l = asprintf(&loading, "%sloading", root); |
| 817 | if (l == -1) |
| 818 | goto root_free_out; |
| 819 | |
| 820 | l = asprintf(&data, "%sdata", root); |
| 821 | if (l == -1) |
| 822 | goto loading_free_out; |
| 823 | |
Nick Kralevich | 45a884f | 2015-02-02 14:37:22 -0800 | [diff] [blame] | 824 | loading_fd = open(loading, O_WRONLY|O_CLOEXEC); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 825 | if(loading_fd < 0) |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 826 | goto data_free_out; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 827 | |
Nick Kralevich | 45a884f | 2015-02-02 14:37:22 -0800 | [diff] [blame] | 828 | data_fd = open(data, O_WRONLY|O_CLOEXEC); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 829 | if(data_fd < 0) |
| 830 | goto loading_close_out; |
| 831 | |
Brian Swetland | 8d48c8e | 2011-03-24 15:45:30 -0700 | [diff] [blame] | 832 | try_loading_again: |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 833 | for (i = 0; i < ARRAY_SIZE(firmware_dirs); i++) { |
| 834 | char *file = NULL; |
| 835 | l = asprintf(&file, "%s/%s", firmware_dirs[i], uevent->firmware); |
| 836 | if (l == -1) |
| 837 | goto data_free_out; |
| 838 | fw_fd = open(file, O_RDONLY|O_CLOEXEC); |
| 839 | free(file); |
| 840 | if (fw_fd >= 0) { |
| 841 | if(!load_firmware(fw_fd, loading_fd, data_fd)) |
| 842 | INFO("firmware: copy success { '%s', '%s' }\n", root, uevent->firmware); |
| 843 | else |
| 844 | INFO("firmware: copy failure { '%s', '%s' }\n", root, uevent->firmware); |
| 845 | break; |
Benoit Goby | 609d882 | 2010-11-09 18:10:24 -0800 | [diff] [blame] | 846 | } |
Brian Swetland | 02863b9 | 2010-09-19 03:36:39 -0700 | [diff] [blame] | 847 | } |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 848 | if (fw_fd < 0) { |
| 849 | if (booting) { |
| 850 | /* If we're not fully booted, we may be missing |
| 851 | * filesystems needed for firmware, wait and retry. |
| 852 | */ |
| 853 | usleep(100000); |
| 854 | booting = is_booting(); |
| 855 | goto try_loading_again; |
| 856 | } |
Elliott Hughes | cd67f00 | 2015-03-20 17:05:56 -0700 | [diff] [blame] | 857 | INFO("firmware: could not open '%s': %s\n", uevent->firmware, strerror(errno)); |
Daniel Rosenberg | d1d9602 | 2015-03-20 15:10:29 -0700 | [diff] [blame] | 858 | write(loading_fd, "-1", 2); |
| 859 | goto data_close_out; |
| 860 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 861 | |
| 862 | close(fw_fd); |
| 863 | data_close_out: |
| 864 | close(data_fd); |
| 865 | loading_close_out: |
| 866 | close(loading_fd); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 867 | data_free_out: |
| 868 | free(data); |
| 869 | loading_free_out: |
| 870 | free(loading); |
| 871 | root_free_out: |
| 872 | free(root); |
| 873 | } |
| 874 | |
| 875 | static void handle_firmware_event(struct uevent *uevent) |
| 876 | { |
| 877 | pid_t pid; |
| 878 | |
| 879 | if(strcmp(uevent->subsystem, "firmware")) |
| 880 | return; |
| 881 | |
| 882 | if(strcmp(uevent->action, "add")) |
| 883 | return; |
| 884 | |
| 885 | /* we fork, to avoid making large memory allocations in init proper */ |
| 886 | pid = fork(); |
| 887 | if (!pid) { |
| 888 | process_firmware_event(uevent); |
Kenny Root | 17baff4 | 2014-08-20 16:16:44 -0700 | [diff] [blame] | 889 | _exit(EXIT_SUCCESS); |
| 890 | } else if (pid < 0) { |
Elliott Hughes | c0e919c | 2015-02-04 14:46:36 -0800 | [diff] [blame] | 891 | ERROR("could not fork to process firmware event: %s\n", strerror(errno)); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 892 | } |
| 893 | } |
| 894 | |
Ruchi Kandoi | c603720 | 2014-06-23 11:22:09 -0700 | [diff] [blame] | 895 | #define UEVENT_MSG_LEN 2048 |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 896 | void handle_device_fd() |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 897 | { |
Vernon Tang | 3f582e9 | 2011-04-25 13:08:17 +1000 | [diff] [blame] | 898 | char msg[UEVENT_MSG_LEN+2]; |
| 899 | int n; |
Nick Kralevich | 57de8b8 | 2011-05-11 14:58:24 -0700 | [diff] [blame] | 900 | while ((n = uevent_kernel_multicast_recv(device_fd, msg, UEVENT_MSG_LEN)) > 0) { |
Nick Kralevich | 5f5d5c8 | 2010-07-19 14:31:20 -0700 | [diff] [blame] | 901 | if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 902 | continue; |
| 903 | |
| 904 | msg[n] = '\0'; |
| 905 | msg[n+1] = '\0'; |
| 906 | |
Nick Kralevich | 5f5d5c8 | 2010-07-19 14:31:20 -0700 | [diff] [blame] | 907 | struct uevent uevent; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 908 | parse_event(msg, &uevent); |
| 909 | |
Nick Kralevich | 4d87095 | 2015-06-12 22:03:50 -0700 | [diff] [blame] | 910 | if (selinux_status_updated() > 0) { |
Stephen Smalley | e2eb69d | 2013-04-16 09:30:30 -0400 | [diff] [blame] | 911 | struct selabel_handle *sehandle2; |
| 912 | sehandle2 = selinux_android_file_context_handle(); |
| 913 | if (sehandle2) { |
| 914 | selabel_close(sehandle); |
| 915 | sehandle = sehandle2; |
| 916 | } |
| 917 | } |
| 918 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 919 | handle_device_event(&uevent); |
| 920 | handle_firmware_event(&uevent); |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | /* Coldboot walks parts of the /sys tree and pokes the uevent files |
| 925 | ** to cause the kernel to regenerate device add events that happened |
| 926 | ** before init's device manager was started |
| 927 | ** |
| 928 | ** We drain any pending events from the netlink socket every time |
| 929 | ** we poke another uevent file to make sure we don't overrun the |
Elliott Hughes | c0e919c | 2015-02-04 14:46:36 -0800 | [diff] [blame] | 930 | ** socket's buffer. |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 931 | */ |
| 932 | |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 933 | static void do_coldboot(DIR *d) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 934 | { |
| 935 | struct dirent *de; |
| 936 | int dfd, fd; |
| 937 | |
| 938 | dfd = dirfd(d); |
| 939 | |
| 940 | fd = openat(dfd, "uevent", O_WRONLY); |
| 941 | if(fd >= 0) { |
| 942 | write(fd, "add\n", 4); |
| 943 | close(fd); |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 944 | handle_device_fd(); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | while((de = readdir(d))) { |
| 948 | DIR *d2; |
| 949 | |
| 950 | if(de->d_type != DT_DIR || de->d_name[0] == '.') |
| 951 | continue; |
| 952 | |
| 953 | fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); |
| 954 | if(fd < 0) |
| 955 | continue; |
| 956 | |
| 957 | d2 = fdopendir(fd); |
| 958 | if(d2 == 0) |
| 959 | close(fd); |
| 960 | else { |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 961 | do_coldboot(d2); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 962 | closedir(d2); |
| 963 | } |
| 964 | } |
| 965 | } |
| 966 | |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 967 | static void coldboot(const char *path) |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 968 | { |
| 969 | DIR *d = opendir(path); |
| 970 | if(d) { |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 971 | do_coldboot(d); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 972 | closedir(d); |
| 973 | } |
| 974 | } |
| 975 | |
Elliott Hughes | 7473836 | 2015-03-28 10:51:23 -0700 | [diff] [blame] | 976 | void device_init() { |
Nick Kralevich | 4d87095 | 2015-06-12 22:03:50 -0700 | [diff] [blame] | 977 | sehandle = selinux_android_file_context_handle(); |
| 978 | selinux_status_open(true); |
Kenny Root | b5982bf | 2012-10-16 23:07:05 -0700 | [diff] [blame] | 979 | |
Andrew Boie | d562ca7 | 2012-12-04 15:47:20 -0800 | [diff] [blame] | 980 | /* is 256K enough? udev uses 16MB! */ |
| 981 | device_fd = uevent_open_socket(256*1024, true); |
Elliott Hughes | 56a0656 | 2015-03-28 11:23:32 -0700 | [diff] [blame] | 982 | if (device_fd == -1) { |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 983 | return; |
Elliott Hughes | 56a0656 | 2015-03-28 11:23:32 -0700 | [diff] [blame] | 984 | } |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 985 | fcntl(device_fd, F_SETFL, O_NONBLOCK); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 986 | |
Elliott Hughes | 56a0656 | 2015-03-28 11:23:32 -0700 | [diff] [blame] | 987 | if (access(COLDBOOT_DONE, F_OK) == 0) { |
Elliott Hughes | da40c00 | 2015-03-27 23:20:44 -0700 | [diff] [blame] | 988 | NOTICE("Skipping coldboot, already done!\n"); |
Elliott Hughes | 56a0656 | 2015-03-28 11:23:32 -0700 | [diff] [blame] | 989 | return; |
Colin Cross | f83d0b9 | 2010-04-21 12:04:20 -0700 | [diff] [blame] | 990 | } |
Elliott Hughes | 56a0656 | 2015-03-28 11:23:32 -0700 | [diff] [blame] | 991 | |
| 992 | Timer t; |
| 993 | coldboot("/sys/class"); |
| 994 | coldboot("/sys/block"); |
| 995 | coldboot("/sys/devices"); |
| 996 | close(open(COLDBOOT_DONE, O_WRONLY|O_CREAT|O_CLOEXEC, 0000)); |
| 997 | NOTICE("Coldboot took %.2fs.\n", t.duration()); |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 998 | } |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 999 | |
Colin Cross | 0dd7ca6 | 2010-04-13 19:25:51 -0700 | [diff] [blame] | 1000 | int get_device_fd() |
| 1001 | { |
| 1002 | return device_fd; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1003 | } |