devices.c revision e6f8d45da8c61d67dc9fdc1cec53f40594043817
14f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* 24f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 34f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 44f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 54f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * you may not use this file except in compliance with the License. 64f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * You may obtain a copy of the License at 74f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 84f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 94f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * 104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * See the License for the specific language governing permissions and 144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project * limitations under the License. 154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project */ 164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <errno.h> 18b93e5812faffd3b6c5fb349072413aace31918d8Olivier Bailly#include <stddef.h> 194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdio.h> 204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <stdlib.h> 214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/stat.h> 224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/types.h> 234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <fcntl.h> 254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <dirent.h> 264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <unistd.h> 274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <string.h> 284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/socket.h> 304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/un.h> 314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <linux/netlink.h> 32e46f9d510db9351682cf17c49115110870147335Stephen Smalley 33e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 34e46f9d510db9351682cf17c49115110870147335Stephen Smalley#include <selinux/selinux.h> 35e46f9d510db9351682cf17c49115110870147335Stephen Smalley#include <selinux/label.h> 36e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 37e46f9d510db9351682cf17c49115110870147335Stephen Smalley 384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <private/android_filesystem_config.h> 394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/time.h> 404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <asm/page.h> 41982a815c10cc28707d81c46112fc45b1c10df3beColin Cross#include <sys/wait.h> 424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 43da04c52ab1036048520fca265cf02b61dca789e0Dima Zavin#include <cutils/list.h> 443f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang#include <cutils/uevent.h> 453f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang 464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "devices.h" 47b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross#include "util.h" 48ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define SYSFS_PREFIX "/sys" 5102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR1 "/etc/firmware" 5202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR2 "/vendor/firmware" 534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 54e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 55e46f9d510db9351682cf17c49115110870147335Stephen Smalleystatic struct selabel_handle *sehandle; 56e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 57e46f9d510db9351682cf17c49115110870147335Stephen Smalley 580dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic int device_fd = -1; 590dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct uevent { 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *action; 624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *path; 634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *subsystem; 644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *firmware; 65b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *partition_name; 66f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong const char *device_name; 67b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int partition_num; 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 74bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char *attr; 754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 85bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 86fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstruct platform_node { 87fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross char *name; 88fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len; 89fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode list; 90fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross}; 91fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 92bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic list_declare(sys_perms); 9344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Crossstatic list_declare(dev_perms); 94fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic list_declare(platform_names); 954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 96bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandint add_dev_perms(const char *name, const char *attr, 97bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland mode_t perm, unsigned int uid, unsigned int gid, 98bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland unsigned short prefix) { 99bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perm_node *node = calloc(1, sizeof(*node)); 1004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 1014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 103bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.name = strdup(name); 104bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.name) 1054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 107bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) { 108bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.attr = strdup(attr); 109bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.attr) 110bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return -ENOMEM; 111bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland } 112bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 118bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) 119bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&sys_perms, &node->plist); 120bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland else 121bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&dev_perms, &node->plist); 122bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 126bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandvoid fixup_sys_perms(const char *upath) 1274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 128bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char buf[512]; 129bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct listnode *node; 130bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perms_ *dp; 1314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 132bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* upaths omit the "/sys" that paths in this list 133bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland * contain, so we add 4 when comparing... 134bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland */ 135bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_for_each(node, &sys_perms) { 136bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland dp = &(node_to_item(node, struct perm_node, plist))->dp; 137bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (dp->prefix) { 138bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) 1394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 141bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strcmp(upath, dp->name + 4)) 1424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 144bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 145bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) 146bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return; 147bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 148bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland sprintf(buf,"/sys%s/%s", upath, dp->attr); 149bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); 150bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chown(buf, dp->uid, dp->gid); 151bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chmod(buf, dp->perm); 1524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 1564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 15844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct listnode *node; 15944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perm_node *perm_node; 16044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perms_ *dp; 16144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 16244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* search the perms list in reverse so that ueventd.$hardware can 16344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross * override ueventd.rc 16444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross */ 16544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross list_for_each_reverse(node, &dev_perms) { 16644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross perm_node = node_to_item(node, struct perm_node, plist); 16744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross dp = &perm_node->dp; 16844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 16944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (dp->prefix) { 17044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strncmp(path, dp->name, strlen(dp->name))) 17144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 17244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross } else { 17344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strcmp(path, dp->name)) 17444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 1754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 17644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = dp->uid; 17744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = dp->gid; 17844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return dp->perm; 1794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 18044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* Default if nothing found. */ 18144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = 0; 18244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = 0; 18344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return 0600; 1844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 186bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic void make_device(const char *path, 187bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland const char *upath, 188bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland int block, int major, int minor) 1894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 1914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 1934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 194e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 195e46f9d510db9351682cf17c49115110870147335Stephen Smalley char *secontext = NULL; 196e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 1974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 199e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 200e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (sehandle) { 201e46f9d510db9351682cf17c49115110870147335Stephen Smalley selabel_lookup(sehandle, &secontext, path, mode); 202e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(secontext); 203e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 204e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 20517dcc5c57dcffb919f3de65ff7a0134ffa3bd874Colin Cross dev = makedev(major, minor); 2066405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 2076405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 2086405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 2096405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 2106405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 2116405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 2124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 2136405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 2146405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 215e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 216e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (secontext) { 217e46f9d510db9351682cf17c49115110870147335Stephen Smalley freecon(secontext); 218e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(NULL); 219e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 220e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 221e46f9d510db9351682cf17c49115110870147335Stephen Smalley} 222e46f9d510db9351682cf17c49115110870147335Stephen Smalley 223e46f9d510db9351682cf17c49115110870147335Stephen Smalley 224e46f9d510db9351682cf17c49115110870147335Stephen Smalleystatic int make_dir(const char *path, mode_t mode) 225e46f9d510db9351682cf17c49115110870147335Stephen Smalley{ 226e46f9d510db9351682cf17c49115110870147335Stephen Smalley int rc; 227e46f9d510db9351682cf17c49115110870147335Stephen Smalley 228e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 229e46f9d510db9351682cf17c49115110870147335Stephen Smalley char *secontext = NULL; 230e46f9d510db9351682cf17c49115110870147335Stephen Smalley 231e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (sehandle) { 232e46f9d510db9351682cf17c49115110870147335Stephen Smalley selabel_lookup(sehandle, &secontext, path, mode); 233e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(secontext); 234e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 235e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 236e46f9d510db9351682cf17c49115110870147335Stephen Smalley 237e46f9d510db9351682cf17c49115110870147335Stephen Smalley rc = mkdir(path, mode); 238e46f9d510db9351682cf17c49115110870147335Stephen Smalley 239e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 240e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (secontext) { 241e46f9d510db9351682cf17c49115110870147335Stephen Smalley freecon(secontext); 242e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(NULL); 243e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 244e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 245e46f9d510db9351682cf17c49115110870147335Stephen Smalley return rc; 2464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 248e46f9d510db9351682cf17c49115110870147335Stephen Smalley 249fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void add_platform_device(const char *name) 250fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 251fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 252fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 253fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 254fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 255fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 256fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 257fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 258fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 259fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 260fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross /* subdevice of an existing platform, ignore it */ 261fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 262fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 263fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 264fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("adding platform device %s\n", name); 265fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 266fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = calloc(1, sizeof(struct platform_node)); 267fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name = strdup(name); 268fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name_len = name_len; 269fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_add_tail(&platform_names, &bus->list); 270fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 271fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 272fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross/* 273fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * given a name that may start with a platform device, find the length of the 274fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * platform device prefix. If it doesn't start with a platform device, return 275fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * 0. 276fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross */ 277fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic const char *find_platform_device(const char *name) 278fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 279fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 280fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 281fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 282fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 283fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 284fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 285fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 286fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 287fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 288fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return bus->name; 289fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 290fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 291fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return NULL; 292fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 293fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 294fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void remove_platform_device(const char *name) 295fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 296fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 297fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 298fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 299fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 300fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 301fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(name, bus->name)) { 302fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("removing platform device %s\n", name); 303fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus->name); 304fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_remove(node); 305fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus); 306fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 307fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 308fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 309fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 310fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 3111e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 3124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 3144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 3164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 3174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 3184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 3214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 3234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 3254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 3264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 3284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 3304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 3324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 3334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 3344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 3354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 3364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 337b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = NULL; 338b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = -1; 339f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong uevent->device_name = NULL; 3404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 3424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 3434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 3444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 3454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 3464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 3474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 3484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 3494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 3504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 3514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 3524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 3534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 3544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 3554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 3564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 3584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 3594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 361b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTN=", 6)) { 362b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 6; 363b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = atoi(msg); 364b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTNAME=", 9)) { 365b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 9; 366b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = msg; 367f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } else if(!strncmp(msg, "DEVNAME=", 8)) { 368f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong msg += 8; 369f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong uevent->device_name = msg; 3704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 372f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* advance to after the next \0 */ 3734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 3744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 3754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 3784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 3794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 3804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 382d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobystatic char **get_character_device_symlinks(struct uevent *uevent) 383d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby{ 384d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby const char *parent; 385d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char *slash; 386d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char **links; 387d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int link_num = 0; 388d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int width; 389d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 390d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (strncmp(uevent->path, "/devices/platform/", 18)) 391d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 392d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 393d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links = malloc(sizeof(char *) * 2); 394d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!links) 395d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 396d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby memset(links, 0, sizeof(char *) * 2); 397d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 398d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip "/devices/platform/<driver>" */ 399d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby parent = strchr(uevent->path + 18, '/'); 400d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 401d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 402d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 403d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!strncmp(parent, "/usb", 4)) { 404d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip root hub name and device. use device interface */ 405d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 406d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (*parent) 407d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 408d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 409d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 410d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby slash = strchr(++parent, '/'); 411d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!slash) 412d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 413d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby width = slash - parent; 414d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (width <= 0) 415d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 416d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 417d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (asprintf(&links[link_num], "/dev/usb/%s%.*s", uevent->subsystem, width, parent) > 0) 418d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby link_num++; 419d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else 420d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links[link_num] = NULL; 421d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby mkdir("/dev/usb", 0755); 422d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 423d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else { 424d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 425d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 426d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 427d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return links; 428d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobyerr: 429d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby free(links); 430d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 431d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby} 432d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 433b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crossstatic char **parse_platform_block_device(struct uevent *uevent) 434b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross{ 435fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *device; 436b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *path; 437b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *slash; 438b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int width; 439b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char buf[256]; 440b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char link_path[256]; 441b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int fd; 442b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int link_num = 0; 443b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int ret; 444b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *p; 445b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross unsigned int size; 446b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross struct stat info; 447b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 448b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = malloc(sizeof(char *) * 4); 449b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!links) 450b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 451b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross memset(links, 0, sizeof(char *) * 4); 452b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 453b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross /* Drop "/devices/platform/" */ 454b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross path = uevent->path; 455fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = path + 18; 456fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = find_platform_device(device); 457fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!device) 458b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 459b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 460fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("found platform device %s\n", device); 461fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 462fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross snprintf(link_path, sizeof(link_path), "/dev/block/platform/%s", device); 463b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 464b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_name) { 465b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross p = strdup(uevent->partition_name); 466b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross sanitize(p); 467b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) 468b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 469b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 470b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 471b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(p); 472b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 473b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 474b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_num >= 0) { 475b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) 476b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 477b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 478b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 479b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 480b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 481b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strrchr(path, '/'); 482b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) 483b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 484b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 485b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 486b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 487b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return links; 488b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 489b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crosserr: 490b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 491b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 492b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross} 493b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 494eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device(const char *action, const char *devpath, 495eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *path, int block, int major, int minor, char **links) 4964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 497b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int i; 4984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 499eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "add")) { 500eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross make_device(devpath, path, block, major, minor); 501b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 502b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 503b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross make_link(devpath, links[i]); 504b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 5054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 507eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "remove")) { 508b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 509b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 510b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross remove_link(devpath, links[i]); 511b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 5124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 513b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 514b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 515b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 516b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 517b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links[i]); 518b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 5194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 522fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void handle_platform_device_event(struct uevent *uevent) 523fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 524fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *name = uevent->path + 18; /* length of /devices/platform/ */ 525fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 526fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(uevent->action, "add")) 527fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross add_platform_device(name); 528fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross else if (!strcmp(uevent->action, "remove")) 529fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross remove_platform_device(name); 530fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 531fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 532eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic const char *parse_device_name(struct uevent *uevent, unsigned int len) 533eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 534eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 535eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 536eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* if it's not a /dev device, nothing else to do */ 537eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if((uevent->major < 0) || (uevent->minor < 0)) 538eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 539eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 540eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* do we have a name? */ 541eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = strrchr(uevent->path, '/'); 542eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!name) 543eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 544eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name++; 545eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 546eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* too-long names would overrun our buffer */ 547eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(strlen(name) > len) 548eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 549eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 550eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return name; 551eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 552eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 553eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_block_device_event(struct uevent *uevent) 554eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 555eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *base = "/dev/block/"; 556eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 557eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96]; 558eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 559eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 560eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 561eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 562eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 563eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 564eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 565e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 566eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 567eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->path, "/devices/platform/", 18)) 568eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = parse_platform_block_device(uevent); 569eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 570eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 1, 571eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 572eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 573eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 574eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_generic_device_event(struct uevent *uevent) 575eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 576eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char *base; 577eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 578eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96] = {0}; 579eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 580eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 581eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 582eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 583eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 584eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 585eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "usb", 3)) { 586eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->subsystem, "usb")) { 587f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong if (uevent->device_name) { 588f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* 589f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * create device node provided by kernel if present 590f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * see drivers/base/core.c 591f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong */ 592f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong char *p = devpath; 593f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong snprintf(devpath, sizeof(devpath), "/dev/%s", uevent->device_name); 594f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* skip leading /dev/ */ 595f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong p += 5; 596f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* build directories */ 597f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong while (*p) { 598f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong if (*p == '/') { 599f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong *p = 0; 600f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir(devpath, 0755); 601f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong *p = '/'; 602f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 603f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong p++; 604f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 605f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 606f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong else { 607f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* This imitates the file system that would be created 608f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * if we were using devfs instead. 609f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * Minors are broken up into groups of 128, starting at "001" 610f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong */ 611f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong int bus_id = uevent->minor / 128 + 1; 612f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong int device_id = uevent->minor % 128 + 1; 613f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* build directories */ 614f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir("/dev/bus", 0755); 615f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir("/dev/bus/usb", 0755); 616f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); 617f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir(devpath, 0755); 618f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); 619f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 620eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 621eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* ignore other USB events */ 622eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 623eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 624eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "graphics", 8)) { 625eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/graphics/"; 626e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 627e6f8d45da8c61d67dc9fdc1cec53f40594043817Lukasz Anaczkowski } else if (!strncmp(uevent->subsystem, "drm", 3)) { 628e6f8d45da8c61d67dc9fdc1cec53f40594043817Lukasz Anaczkowski base = "/dev/dri/"; 629e6f8d45da8c61d67dc9fdc1cec53f40594043817Lukasz Anaczkowski make_dir(base, 0755); 630eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 631eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/oncrpc/"; 632e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 633eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 634eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/adsp/"; 635e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 636eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 637eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/msm_camera/"; 638e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 639eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "input", 5)) { 640eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/input/"; 641e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 642eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 643eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/mtd/"; 644e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 645eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "sound", 5)) { 646eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/snd/"; 647e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 648eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "misc", 4) && 649eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross !strncmp(name, "log_", 4)) { 650eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/log/"; 651e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 652eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name += 4; 653eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else 654eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/"; 655eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = get_character_device_symlinks(uevent); 656eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 657eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!devpath[0]) 658eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 659eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 660eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 0, 661eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 662eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 663eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 664eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device_event(struct uevent *uevent) 665eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 666eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->action,"add")) 667eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross fixup_sys_perms(uevent->path); 668eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 669eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "block", 5)) { 670eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_block_device_event(uevent); 671fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } else if (!strncmp(uevent->subsystem, "platform", 8)) { 672fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross handle_platform_device_event(uevent); 673eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 674eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_generic_device_event(uevent); 675eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 676eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 677eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 6784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 6794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 6814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 6824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 6834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 6854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 6864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 6874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 6894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 6914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 6924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 6934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 6954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 6964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 6984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 7004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 7034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 7044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 7054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 7074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 7084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 7094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 7104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 7124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 7164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 7174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 7184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 7194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 7204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 7224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7248d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandstatic int is_booting(void) 7258d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland{ 7268d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland return access("/dev/.booting", F_OK) == 0; 7278d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland} 7288d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland 7294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 7304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 73102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland char *root, *loading, *data, *file1 = NULL, *file2 = NULL; 7324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 7338d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland int booting = is_booting(); 7344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7358d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: loading '%s' for '%s'\n", 7368d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland uevent->firmware, uevent->path); 7374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 7394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 7434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 7454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 7474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 7494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 75002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware); 75102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if (l == -1) 75202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_free_out; 75302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland 75402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware); 7554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 7574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 7594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 7604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 7614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 7634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 7644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 7654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7668d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandtry_loading_again: 76702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file1, O_RDONLY); 76802863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) { 76902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file2, O_RDONLY); 770609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby if (fw_fd < 0) { 7718d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland if (booting) { 7728d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland /* If we're not fully booted, we may be missing 7738d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland * filesystems needed for firmware, wait and retry. 7748d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland */ 7758d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland usleep(100000); 7768d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland booting = is_booting(); 7778d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland goto try_loading_again; 7788d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland } 7798d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: could not open '%s' %d\n", uevent->firmware, errno); 780609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby write(loading_fd, "-1", 2); 78102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_close_out; 782609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby } 78302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland } 7844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 7868d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy success { '%s', '%s' }\n", root, uevent->firmware); 7874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 7888d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy failure { '%s', '%s' }\n", root, uevent->firmware); 7894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 7914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 7924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 7934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 7944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 7954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 79602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file1); 79702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file2); 7984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 7994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 8004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 8014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 8024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 8034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 8044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 8074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 809982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int ret; 8104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 8124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 8134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 8154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 8164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 8184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 8194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 8204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 8214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 8224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 8260dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid handle_device_fd() 8274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8283f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang char msg[UEVENT_MSG_LEN+2]; 8293f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang int n; 83057de8b8f27f887ca8084671df777a4ac199ba647Nick Kralevich while ((n = uevent_kernel_multicast_recv(device_fd, msg, UEVENT_MSG_LEN)) > 0) { 8315f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 8324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 8354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 8364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8375f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 8384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 8394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 8414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 8424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 8464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 8474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 8484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 8494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 8504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 8514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 8524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 8534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8540dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void do_coldboot(DIR *d) 8554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 8574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 8584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 8604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 8624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 8634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 8644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8650dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross handle_device_fd(); 8664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 8694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 8704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 8724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 8754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 8764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 8794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 8804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 8820dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d2); 8834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 8844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8880dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void coldboot(const char *path) 8894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 8914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 8920dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d); 8934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 8944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8970dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid device_init(void) 8984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 900f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross struct stat info; 901f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross int fd; 902e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 903e46f9d510db9351682cf17c49115110870147335Stephen Smalley struct selinux_opt seopts[] = { 904e46f9d510db9351682cf17c49115110870147335Stephen Smalley { SELABEL_OPT_PATH, "/file_contexts" } 905e46f9d510db9351682cf17c49115110870147335Stephen Smalley }; 9064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 907e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (is_selinux_enabled() > 0) 908e46f9d510db9351682cf17c49115110870147335Stephen Smalley sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1); 909e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 9102d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin /* is 64K enough? udev uses 16MB! */ 9112d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin device_fd = uevent_open_socket(64*1024, true); 9120dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross if(device_fd < 0) 9130dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return; 9144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 9150dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFD, FD_CLOEXEC); 9160dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFL, O_NONBLOCK); 9174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 918f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross if (stat(coldboot_done, &info) < 0) { 919f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t0 = get_usecs(); 920f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/class"); 921f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/block"); 922f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/devices"); 923f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t1 = get_usecs(); 924f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); 925f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross close(fd); 926f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 927f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } else { 928f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("skipping coldboot, already done\n"); 929f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } 9300dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross} 9314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 9320dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossint get_device_fd() 9330dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross{ 9340dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return device_fd; 9354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 936