devices.c revision e46f9d510db9351682cf17c49115110870147335
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; 66b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int partition_num; 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 73bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char *attr; 744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 84bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 85fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstruct platform_node { 86fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross char *name; 87fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len; 88fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode list; 89fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross}; 90fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 91bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic list_declare(sys_perms); 9244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Crossstatic list_declare(dev_perms); 93fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic list_declare(platform_names); 944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 95bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandint add_dev_perms(const char *name, const char *attr, 96bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland mode_t perm, unsigned int uid, unsigned int gid, 97bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland unsigned short prefix) { 98bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perm_node *node = calloc(1, sizeof(*node)); 994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 1004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 102bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.name = strdup(name); 103bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.name) 1044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 106bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) { 107bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.attr = strdup(attr); 108bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.attr) 109bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return -ENOMEM; 110bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland } 111bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 117bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) 118bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&sys_perms, &node->plist); 119bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland else 120bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&dev_perms, &node->plist); 121bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 125bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandvoid fixup_sys_perms(const char *upath) 1264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 127bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char buf[512]; 128bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct listnode *node; 129bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perms_ *dp; 1304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 131bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* upaths omit the "/sys" that paths in this list 132bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland * contain, so we add 4 when comparing... 133bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland */ 134bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_for_each(node, &sys_perms) { 135bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland dp = &(node_to_item(node, struct perm_node, plist))->dp; 136bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (dp->prefix) { 137bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) 1384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 140bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strcmp(upath, dp->name + 4)) 1414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 143bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 144bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) 145bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return; 146bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 147bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland sprintf(buf,"/sys%s/%s", upath, dp->attr); 148bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); 149bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chown(buf, dp->uid, dp->gid); 150bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chmod(buf, dp->perm); 1514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 1554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 15744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct listnode *node; 15844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perm_node *perm_node; 15944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perms_ *dp; 16044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 16144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* search the perms list in reverse so that ueventd.$hardware can 16244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross * override ueventd.rc 16344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross */ 16444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross list_for_each_reverse(node, &dev_perms) { 16544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross perm_node = node_to_item(node, struct perm_node, plist); 16644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross dp = &perm_node->dp; 16744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 16844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (dp->prefix) { 16944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strncmp(path, dp->name, strlen(dp->name))) 17044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 17144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross } else { 17244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strcmp(path, dp->name)) 17344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 1744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 17544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = dp->uid; 17644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = dp->gid; 17744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return dp->perm; 1784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 17944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* Default if nothing found. */ 18044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = 0; 18144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = 0; 18244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return 0600; 1834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 185bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic void make_device(const char *path, 186bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland const char *upath, 187bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland int block, int major, int minor) 1884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 1904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 1914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 193e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 194e46f9d510db9351682cf17c49115110870147335Stephen Smalley char *secontext = NULL; 195e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 1964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 198e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 199e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (sehandle) { 200e46f9d510db9351682cf17c49115110870147335Stephen Smalley selabel_lookup(sehandle, &secontext, path, mode); 201e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(secontext); 202e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 203e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 20417dcc5c57dcffb919f3de65ff7a0134ffa3bd874Colin Cross dev = makedev(major, minor); 2056405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 2066405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 2076405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 2086405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 2096405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 2106405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 2114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 2126405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 2136405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 214e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 215e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (secontext) { 216e46f9d510db9351682cf17c49115110870147335Stephen Smalley freecon(secontext); 217e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(NULL); 218e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 219e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 220e46f9d510db9351682cf17c49115110870147335Stephen Smalley} 221e46f9d510db9351682cf17c49115110870147335Stephen Smalley 222e46f9d510db9351682cf17c49115110870147335Stephen Smalley 223e46f9d510db9351682cf17c49115110870147335Stephen Smalleystatic int make_dir(const char *path, mode_t mode) 224e46f9d510db9351682cf17c49115110870147335Stephen Smalley{ 225e46f9d510db9351682cf17c49115110870147335Stephen Smalley int rc; 226e46f9d510db9351682cf17c49115110870147335Stephen Smalley 227e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 228e46f9d510db9351682cf17c49115110870147335Stephen Smalley char *secontext = NULL; 229e46f9d510db9351682cf17c49115110870147335Stephen Smalley 230e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (sehandle) { 231e46f9d510db9351682cf17c49115110870147335Stephen Smalley selabel_lookup(sehandle, &secontext, path, mode); 232e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(secontext); 233e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 234e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 235e46f9d510db9351682cf17c49115110870147335Stephen Smalley 236e46f9d510db9351682cf17c49115110870147335Stephen Smalley rc = mkdir(path, mode); 237e46f9d510db9351682cf17c49115110870147335Stephen Smalley 238e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 239e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (secontext) { 240e46f9d510db9351682cf17c49115110870147335Stephen Smalley freecon(secontext); 241e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(NULL); 242e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 243e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 244e46f9d510db9351682cf17c49115110870147335Stephen Smalley return rc; 2454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 247e46f9d510db9351682cf17c49115110870147335Stephen Smalley 248fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void add_platform_device(const char *name) 249fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 250fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 251fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 252fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 253fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 254fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 255fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 256fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 257fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 258fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 259fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross /* subdevice of an existing platform, ignore it */ 260fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 261fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 262fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 263fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("adding platform device %s\n", name); 264fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 265fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = calloc(1, sizeof(struct platform_node)); 266fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name = strdup(name); 267fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name_len = name_len; 268fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_add_tail(&platform_names, &bus->list); 269fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 270fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 271fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross/* 272fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * given a name that may start with a platform device, find the length of the 273fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * platform device prefix. If it doesn't start with a platform device, return 274fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * 0. 275fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross */ 276fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic const char *find_platform_device(const char *name) 277fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 278fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 279fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 280fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 281fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 282fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 283fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 284fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 285fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 286fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 287fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return bus->name; 288fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 289fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 290fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return NULL; 291fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 292fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 293fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void remove_platform_device(const char *name) 294fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 295fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 296fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 297fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 298fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 299fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 300fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(name, bus->name)) { 301fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("removing platform device %s\n", name); 302fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus->name); 303fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_remove(node); 304fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus); 305fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 306fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 307fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 308fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 309fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 3101e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 3114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 3134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 3154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 3164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 3174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 3204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 3224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 3244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 3254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 3274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 3294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 3304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 3314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 3324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 3334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 3344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 3354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 336b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = NULL; 337b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = -1; 3384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 3404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 3414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 3424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 3434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 3444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 3454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 3464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 3474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 3484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 3494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 3504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 3514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 3524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 3534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 3544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 3564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 3574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 359b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTN=", 6)) { 360b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 6; 361b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = atoi(msg); 362b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTNAME=", 9)) { 363b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 9; 364b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = msg; 3654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* advance to after the next \0 */ 3684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 3694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 3704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 3734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 3744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 3754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 377d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobystatic char **get_character_device_symlinks(struct uevent *uevent) 378d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby{ 379d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby const char *parent; 380d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char *slash; 381d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char **links; 382d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int link_num = 0; 383d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int width; 384d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 385d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (strncmp(uevent->path, "/devices/platform/", 18)) 386d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 387d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 388d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links = malloc(sizeof(char *) * 2); 389d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!links) 390d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 391d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby memset(links, 0, sizeof(char *) * 2); 392d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 393d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip "/devices/platform/<driver>" */ 394d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby parent = strchr(uevent->path + 18, '/'); 395d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 396d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 397d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 398d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!strncmp(parent, "/usb", 4)) { 399d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip root hub name and device. use device interface */ 400d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 401d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (*parent) 402d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 403d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 404d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 405d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby slash = strchr(++parent, '/'); 406d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!slash) 407d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 408d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby width = slash - parent; 409d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (width <= 0) 410d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 411d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 412d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (asprintf(&links[link_num], "/dev/usb/%s%.*s", uevent->subsystem, width, parent) > 0) 413d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby link_num++; 414d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else 415d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links[link_num] = NULL; 416d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby mkdir("/dev/usb", 0755); 417d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 418d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else { 419d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 420d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 421d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 422d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return links; 423d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobyerr: 424d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby free(links); 425d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 426d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby} 427d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 428b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crossstatic char **parse_platform_block_device(struct uevent *uevent) 429b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross{ 430fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *device; 431b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *path; 432b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *slash; 433b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int width; 434b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char buf[256]; 435b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char link_path[256]; 436b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int fd; 437b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int link_num = 0; 438b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int ret; 439b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *p; 440b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross unsigned int size; 441b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross struct stat info; 442b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 443b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = malloc(sizeof(char *) * 4); 444b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!links) 445b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 446b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross memset(links, 0, sizeof(char *) * 4); 447b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 448b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross /* Drop "/devices/platform/" */ 449b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross path = uevent->path; 450fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = path + 18; 451fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = find_platform_device(device); 452fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!device) 453b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 454b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 455fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("found platform device %s\n", device); 456fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 457fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross snprintf(link_path, sizeof(link_path), "/dev/block/platform/%s", device); 458b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 459b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_name) { 460b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross p = strdup(uevent->partition_name); 461b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross sanitize(p); 462b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) 463b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 464b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 465b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 466b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(p); 467b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 468b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 469b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_num >= 0) { 470b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) 471b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 472b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 473b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 474b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 475b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 476b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strrchr(path, '/'); 477b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) 478b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 479b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 480b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 481b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 482b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return links; 483b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 484b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crosserr: 485b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 486b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 487b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross} 488b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 489eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device(const char *action, const char *devpath, 490eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *path, int block, int major, int minor, char **links) 4914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 492b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int i; 4934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 494eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "add")) { 495eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross make_device(devpath, path, block, major, minor); 496b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 497b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 498b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross make_link(devpath, links[i]); 499b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 5004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 502eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "remove")) { 503b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 504b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 505b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross remove_link(devpath, links[i]); 506b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 5074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 508b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 509b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 510b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 511b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 512b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links[i]); 513b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 5144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 5154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 5164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 517fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void handle_platform_device_event(struct uevent *uevent) 518fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 519fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *name = uevent->path + 18; /* length of /devices/platform/ */ 520fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 521fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(uevent->action, "add")) 522fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross add_platform_device(name); 523fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross else if (!strcmp(uevent->action, "remove")) 524fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross remove_platform_device(name); 525fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 526fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 527eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic const char *parse_device_name(struct uevent *uevent, unsigned int len) 528eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 529eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 530eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 531eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* if it's not a /dev device, nothing else to do */ 532eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if((uevent->major < 0) || (uevent->minor < 0)) 533eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 534eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 535eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* do we have a name? */ 536eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = strrchr(uevent->path, '/'); 537eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!name) 538eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 539eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name++; 540eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 541eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* too-long names would overrun our buffer */ 542eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(strlen(name) > len) 543eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 544eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 545eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return name; 546eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 547eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 548eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_block_device_event(struct uevent *uevent) 549eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 550eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *base = "/dev/block/"; 551eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 552eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96]; 553eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 554eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 555eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 556eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 557eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 558eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 559eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 560e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 561eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 562eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->path, "/devices/platform/", 18)) 563eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = parse_platform_block_device(uevent); 564eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 565eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 1, 566eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 567eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 568eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 569eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_generic_device_event(struct uevent *uevent) 570eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 571eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char *base; 572eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 573eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96] = {0}; 574eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 575eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 576eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 577eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 578eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 579eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 580eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "usb", 3)) { 581eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->subsystem, "usb")) { 582eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* This imitates the file system that would be created 583eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross * if we were using devfs instead. 584eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross * Minors are broken up into groups of 128, starting at "001" 585eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross */ 586eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross int bus_id = uevent->minor / 128 + 1; 587eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross int device_id = uevent->minor % 128 + 1; 588eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* build directories */ 589e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir("/dev/bus", 0755); 590e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir("/dev/bus/usb", 0755); 591eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); 592e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(devpath, 0755); 593eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); 594eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 595eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* ignore other USB events */ 596eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 597eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 598eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "graphics", 8)) { 599eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/graphics/"; 600e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 601eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 602eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/oncrpc/"; 603e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 604eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 605eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/adsp/"; 606e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 607eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 608eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/msm_camera/"; 609e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 610eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "input", 5)) { 611eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/input/"; 612e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 613eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 614eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/mtd/"; 615e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 616eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "sound", 5)) { 617eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/snd/"; 618e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 619eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "misc", 4) && 620eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross !strncmp(name, "log_", 4)) { 621eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/log/"; 622e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 623eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name += 4; 624eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else 625eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/"; 626eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = get_character_device_symlinks(uevent); 627eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 628eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!devpath[0]) 629eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 630eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 631eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 0, 632eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 633eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 634eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 635eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device_event(struct uevent *uevent) 636eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 637eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->action,"add")) 638eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross fixup_sys_perms(uevent->path); 639eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 640eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "block", 5)) { 641eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_block_device_event(uevent); 642fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } else if (!strncmp(uevent->subsystem, "platform", 8)) { 643fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross handle_platform_device_event(uevent); 644eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 645eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_generic_device_event(uevent); 646eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 647eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 648eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 6494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 6504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 6524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 6534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 6544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 6564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 6574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 6584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 6604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 6624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 6634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 6644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 6664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 6674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 6694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 6744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 6754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 6764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 6784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 6794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 6814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 6834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 6874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 6884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 6894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 6904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 6914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 6934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6958d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandstatic int is_booting(void) 6968d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland{ 6978d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland return access("/dev/.booting", F_OK) == 0; 6988d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland} 6998d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland 7004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 7014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 70202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland char *root, *loading, *data, *file1 = NULL, *file2 = NULL; 7034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 7048d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland int booting = is_booting(); 7054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7068d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: loading '%s' for '%s'\n", 7078d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland uevent->firmware, uevent->path); 7084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 7104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 7144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 7164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 7184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 7204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 72102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware); 72202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if (l == -1) 72302863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_free_out; 72402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland 72502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware); 7264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 7284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 7304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 7314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 7324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 7344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 7354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 7364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7378d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandtry_loading_again: 73802863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file1, O_RDONLY); 73902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) { 74002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file2, O_RDONLY); 741609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby if (fw_fd < 0) { 7428d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland if (booting) { 7438d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland /* If we're not fully booted, we may be missing 7448d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland * filesystems needed for firmware, wait and retry. 7458d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland */ 7468d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland usleep(100000); 7478d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland booting = is_booting(); 7488d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland goto try_loading_again; 7498d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland } 7508d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: could not open '%s' %d\n", uevent->firmware, errno); 751609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby write(loading_fd, "-1", 2); 75202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_close_out; 753609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby } 75402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland } 7554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 7578d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy success { '%s', '%s' }\n", root, uevent->firmware); 7584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 7598d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy failure { '%s', '%s' }\n", root, uevent->firmware); 7604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 7624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 7634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 7644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 7654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 7664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 76702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file1); 76802863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file2); 7694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 7704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 7714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 7724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 7734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 7744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 7754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 7784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 780982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int ret; 7814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 7834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 7864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 7894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 7904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 7914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 7924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 7934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 7970dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid handle_device_fd() 7984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7993f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang char msg[UEVENT_MSG_LEN+2]; 8003f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang int n; 80157de8b8f27f887ca8084671df777a4ac199ba647Nick Kralevich while ((n = uevent_kernel_multicast_recv(device_fd, msg, UEVENT_MSG_LEN)) > 0) { 8025f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 8034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 8064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 8074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8085f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 8094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 8104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 8124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 8134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 8174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 8184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 8194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 8204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 8214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 8224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 8234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 8244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8250dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void do_coldboot(DIR *d) 8264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 8284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 8294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 8314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 8334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 8344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 8354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8360dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross handle_device_fd(); 8374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 8404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 8414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 8434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 8464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 8474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 8504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 8514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 8530dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d2); 8544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 8554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8590dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void coldboot(const char *path) 8604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 8624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 8630dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d); 8644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 8654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8680dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid device_init(void) 8694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 871f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross struct stat info; 872f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross int fd; 873e46f9d510db9351682cf17c49115110870147335Stephen Smalley#ifdef HAVE_SELINUX 874e46f9d510db9351682cf17c49115110870147335Stephen Smalley struct selinux_opt seopts[] = { 875e46f9d510db9351682cf17c49115110870147335Stephen Smalley { SELABEL_OPT_PATH, "/file_contexts" } 876e46f9d510db9351682cf17c49115110870147335Stephen Smalley }; 8774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 878e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (is_selinux_enabled() > 0) 879e46f9d510db9351682cf17c49115110870147335Stephen Smalley sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1); 880e46f9d510db9351682cf17c49115110870147335Stephen Smalley#endif 8812d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin /* is 64K enough? udev uses 16MB! */ 8822d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin device_fd = uevent_open_socket(64*1024, true); 8830dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross if(device_fd < 0) 8840dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return; 8854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8860dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFD, FD_CLOEXEC); 8870dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFL, O_NONBLOCK); 8884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 889f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross if (stat(coldboot_done, &info) < 0) { 890f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t0 = get_usecs(); 891f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/class"); 892f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/block"); 893f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/devices"); 894f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t1 = get_usecs(); 895f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); 896f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross close(fd); 897f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 898f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } else { 899f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("skipping coldboot, already done\n"); 900f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } 9010dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross} 9024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 9030dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossint get_device_fd() 9040dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross{ 9050dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return device_fd; 9064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 907