devices.c revision b5982bf7c65b30be981ecfe1847437b05e32b2bb
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#include <selinux/selinux.h> 34e46f9d510db9351682cf17c49115110870147335Stephen Smalley#include <selinux/label.h> 35ae6f3d7c05070f7e0e56fe0056c8923c6ee2f473Stephen Smalley#include <selinux/android.h> 36e46f9d510db9351682cf17c49115110870147335Stephen Smalley 374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <private/android_filesystem_config.h> 384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <sys/time.h> 394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include <asm/page.h> 40982a815c10cc28707d81c46112fc45b1c10df3beColin Cross#include <sys/wait.h> 414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 42da04c52ab1036048520fca265cf02b61dca789e0Dima Zavin#include <cutils/list.h> 433f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang#include <cutils/uevent.h> 443f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang 454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#include "devices.h" 46b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross#include "util.h" 47ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define SYSFS_PREFIX "/sys" 5002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR1 "/etc/firmware" 5102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland#define FIRMWARE_DIR2 "/vendor/firmware" 524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 53e096e36e50b4b66638ebc4d3c09c2ee35f538dfaStephen Smalleyextern struct selabel_handle *sehandle; 54e46f9d510db9351682cf17c49115110870147335Stephen Smalley 550dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic int device_fd = -1; 560dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross 574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct uevent { 584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *action; 594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *path; 604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *subsystem; 614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project const char *firmware; 62b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *partition_name; 63f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong const char *device_name; 64b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int partition_num; 654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int major; 664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int minor; 674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perms_ { 704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char *name; 71bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char *attr; 724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int uid; 744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned int gid; 754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned short prefix; 764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstruct perm_node { 794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct perms_ dp; 804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct listnode plist; 814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project}; 82bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 83fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstruct platform_node { 84fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross char *name; 85fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len; 86fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode list; 87fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross}; 88fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 89bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic list_declare(sys_perms); 9044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Crossstatic list_declare(dev_perms); 91fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic list_declare(platform_names); 924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 93bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandint add_dev_perms(const char *name, const char *attr, 94bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland mode_t perm, unsigned int uid, unsigned int gid, 95bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland unsigned short prefix) { 96bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perm_node *node = calloc(1, sizeof(*node)); 974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!node) 984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 100bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.name = strdup(name); 101bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.name) 1024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -ENOMEM; 1034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 104bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) { 105bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland node->dp.attr = strdup(attr); 106bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (!node->dp.attr) 107bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return -ENOMEM; 108bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland } 109bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.perm = perm; 1114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.uid = uid; 1124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.gid = gid; 1134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project node->dp.prefix = prefix; 1144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 115bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (attr) 116bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&sys_perms, &node->plist); 117bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland else 118bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_add_tail(&dev_perms, &node->plist); 119bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 1204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return 0; 1214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 123bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandvoid fixup_sys_perms(const char *upath) 1244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 125bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland char buf[512]; 126bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct listnode *node; 127bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland struct perms_ *dp; 1284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 129bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland /* upaths omit the "/sys" that paths in this list 130bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland * contain, so we add 4 when comparing... 131bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland */ 132bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland list_for_each(node, &sys_perms) { 133bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland dp = &(node_to_item(node, struct perm_node, plist))->dp; 134bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (dp->prefix) { 135bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strncmp(upath, dp->name + 4, strlen(dp->name + 4))) 1364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else { 138bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if (strcmp(upath, dp->name + 4)) 1394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 1404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 141bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 142bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf)) 143bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland return; 144bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland 145bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland sprintf(buf,"/sys%s/%s", upath, dp->attr); 146bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm); 147bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chown(buf, dp->uid, dp->gid); 148bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland chmod(buf, dp->perm); 1494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 1504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) 1534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t perm; 15544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct listnode *node; 15644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perm_node *perm_node; 15744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross struct perms_ *dp; 15844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 15944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* search the perms list in reverse so that ueventd.$hardware can 16044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross * override ueventd.rc 16144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross */ 16244b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross list_for_each_reverse(node, &dev_perms) { 16344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross perm_node = node_to_item(node, struct perm_node, plist); 16444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross dp = &perm_node->dp; 16544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross 16644b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (dp->prefix) { 16744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strncmp(path, dp->name, strlen(dp->name))) 16844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 16944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross } else { 17044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross if (strcmp(path, dp->name)) 17144b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross continue; 1724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 17344b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = dp->uid; 17444b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = dp->gid; 17544b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return dp->perm; 1764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 17744b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross /* Default if nothing found. */ 17844b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *uid = 0; 17944b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross *gid = 0; 18044b65d047cc39baf30e21bfd8dd438f6bc1f77f5Colin Cross return 0600; 1814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 1824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 183bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetlandstatic void make_device(const char *path, 184bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland const char *upath, 185bc57d4ce925a62f14c28c55e0ff28af1114f12beBrian Swetland int block, int major, int minor) 1864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 1874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned uid; 1884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unsigned gid; 1894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode_t mode; 1904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dev_t dev; 191e46f9d510db9351682cf17c49115110870147335Stephen Smalley char *secontext = NULL; 1924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 1934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR); 194b5982bf7c65b30be981ecfe1847437b05e32b2bbKenny Root 195e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (sehandle) { 196e46f9d510db9351682cf17c49115110870147335Stephen Smalley selabel_lookup(sehandle, &secontext, path, mode); 197e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(secontext); 198e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 199b5982bf7c65b30be981ecfe1847437b05e32b2bbKenny Root 20017dcc5c57dcffb919f3de65ff7a0134ffa3bd874Colin Cross dev = makedev(major, minor); 2016405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly /* Temporarily change egid to avoid race condition setting the gid of the 2026405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * device node. Unforunately changing the euid would prevent creation of 2036405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * some device nodes, so the uid has to be set with chown() and is still 2046405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * racy. Fixing the gid race at least fixed the issue with system_server 2056405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly * opening dynamic input devices under the AID_INPUT gid. */ 2066405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(gid); 2074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project mknod(path, mode, dev); 2086405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly chown(path, uid, -1); 2096405c6953fa02d41d9f6377f4cdb947604f481c4Nick Pelly setegid(AID_ROOT); 210b5982bf7c65b30be981ecfe1847437b05e32b2bbKenny Root 211e46f9d510db9351682cf17c49115110870147335Stephen Smalley if (secontext) { 212e46f9d510db9351682cf17c49115110870147335Stephen Smalley freecon(secontext); 213e46f9d510db9351682cf17c49115110870147335Stephen Smalley setfscreatecon(NULL); 214e46f9d510db9351682cf17c49115110870147335Stephen Smalley } 215e46f9d510db9351682cf17c49115110870147335Stephen Smalley} 216e46f9d510db9351682cf17c49115110870147335Stephen Smalley 217fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void add_platform_device(const char *name) 218fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 219fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 220fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 221fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 222fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 223fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 224fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 225fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 226fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 227fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 228fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross /* subdevice of an existing platform, ignore it */ 229fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 230fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 231fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 232fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("adding platform device %s\n", name); 233fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 234fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = calloc(1, sizeof(struct platform_node)); 235fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name = strdup(name); 236fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus->name_len = name_len; 237fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_add_tail(&platform_names, &bus->list); 238fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 239fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 240fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross/* 241fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * given a name that may start with a platform device, find the length of the 242fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * platform device prefix. If it doesn't start with a platform device, return 243fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross * 0. 244fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross */ 245fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic const char *find_platform_device(const char *name) 246fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 247fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross int name_len = strlen(name); 248fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 249fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 250fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 251fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 252fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 253fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if ((bus->name_len < name_len) && 254fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross (name[bus->name_len] == '/') && 255fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross !strncmp(name, bus->name, bus->name_len)) 256fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return bus->name; 257fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 258fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 259fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return NULL; 260fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 261fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 262fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void remove_platform_device(const char *name) 263fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 264fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct listnode *node; 265fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross struct platform_node *bus; 266fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 267fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_for_each_reverse(node, &platform_names) { 268fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross bus = node_to_item(node, struct platform_node, list); 269fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(name, bus->name)) { 270fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("removing platform device %s\n", name); 271fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus->name); 272fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross list_remove(node); 273fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross free(bus); 274fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross return; 275fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 276fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } 277fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 278fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 2791e070846f8908dff15086efa12fbba01ab7eae15Chuck Tuffli#if LOG_UEVENTS 2804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic inline suseconds_t get_usecs(void) 2824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct timeval tv; 2844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project gettimeofday(&tv, 0); 2854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec; 2864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 2874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(x...) INFO(x) 2894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#else 2914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define log_event_print(fmt, args...) do { } while (0) 2934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define get_usecs() 0 2944f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#endif 2964f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 2974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void parse_event(const char *msg, struct uevent *uevent) 2984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 2994f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = ""; 3004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = ""; 3014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = ""; 3024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = ""; 3034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = -1; 3044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = -1; 305b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = NULL; 306b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = -1; 307f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong uevent->device_name = NULL; 3084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* currently ignoring SEQNUM */ 3104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg) { 3114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!strncmp(msg, "ACTION=", 7)) { 3124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 7; 3134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action = msg; 3144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "DEVPATH=", 8)) { 3154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 8; 3164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->path = msg; 3174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "SUBSYSTEM=", 10)) { 3184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 10; 3194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->subsystem = msg; 3204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "FIRMWARE=", 9)) { 3214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 9; 3224f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware = msg; 3234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MAJOR=", 6)) { 3244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->major = atoi(msg); 3264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } else if(!strncmp(msg, "MINOR=", 6)) { 3274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg += 6; 3284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->minor = atoi(msg); 329b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTN=", 6)) { 330b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 6; 331b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_num = atoi(msg); 332b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } else if(!strncmp(msg, "PARTNAME=", 9)) { 333b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross msg += 9; 334b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross uevent->partition_name = msg; 335f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } else if(!strncmp(msg, "DEVNAME=", 8)) { 336f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong msg += 8; 337f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong uevent->device_name = msg; 3384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 340f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* advance to after the next \0 */ 3414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while(*msg++) 3424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ; 3434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 3444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 3454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n", 3464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->action, uevent->path, uevent->subsystem, 3474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project uevent->firmware, uevent->major, uevent->minor); 3484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 3494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 350d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobystatic char **get_character_device_symlinks(struct uevent *uevent) 351d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby{ 352d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby const char *parent; 353d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char *slash; 354d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby char **links; 355d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int link_num = 0; 356d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby int width; 357d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 358d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (strncmp(uevent->path, "/devices/platform/", 18)) 359d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 360d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 361d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links = malloc(sizeof(char *) * 2); 362d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!links) 363d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 364d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby memset(links, 0, sizeof(char *) * 2); 365d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 366d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip "/devices/platform/<driver>" */ 367d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby parent = strchr(uevent->path + 18, '/'); 368d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 369d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 370d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 371d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!strncmp(parent, "/usb", 4)) { 372d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby /* skip root hub name and device. use device interface */ 373d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 374d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (*parent) 375d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby while (*++parent && *parent != '/'); 376d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!*parent) 377d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 378d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby slash = strchr(++parent, '/'); 379d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (!slash) 380d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 381d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby width = slash - parent; 382d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (width <= 0) 383d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 384d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 385d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby if (asprintf(&links[link_num], "/dev/usb/%s%.*s", uevent->subsystem, width, parent) > 0) 386d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby link_num++; 387d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else 388d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby links[link_num] = NULL; 389d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby mkdir("/dev/usb", 0755); 390d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 391d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby else { 392d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby goto err; 393d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby } 394d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 395d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return links; 396d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Gobyerr: 397d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby free(links); 398d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby return NULL; 399d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby} 400d2278638d6b37717b51d622929eb4c8f6e16cb0cBenoit Goby 401b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crossstatic char **parse_platform_block_device(struct uevent *uevent) 402b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross{ 403fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *device; 404b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross const char *path; 405b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *slash; 406b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int width; 407b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char buf[256]; 408b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char link_path[256]; 409b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int fd; 410b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int link_num = 0; 411b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int ret; 412b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char *p; 413b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross unsigned int size; 414b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross struct stat info; 415b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 416b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross char **links = malloc(sizeof(char *) * 4); 417b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (!links) 418b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 419b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross memset(links, 0, sizeof(char *) * 4); 420b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 421b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross /* Drop "/devices/platform/" */ 422b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross path = uevent->path; 423fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = path + 18; 424fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross device = find_platform_device(device); 425fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!device) 426b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross goto err; 427b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 428fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross INFO("found platform device %s\n", device); 429fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 430fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross snprintf(link_path, sizeof(link_path), "/dev/block/platform/%s", device); 431b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 432b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_name) { 433b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross p = strdup(uevent->partition_name); 434b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross sanitize(p); 435b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) 436b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 437b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 438b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 439b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(p); 440b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 441b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 442b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (uevent->partition_num >= 0) { 443b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) 444b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 445b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 446b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 447b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 448b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 449b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross slash = strrchr(path, '/'); 450b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) 451b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross link_num++; 452b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross else 453b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross links[link_num] = NULL; 454b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 455b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return links; 456b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 457b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Crosserr: 458b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 459b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross return NULL; 460b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross} 461b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 462eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device(const char *action, const char *devpath, 463eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *path, int block, int major, int minor, char **links) 4644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 465b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross int i; 4664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 467eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "add")) { 468eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross make_device(devpath, path, block, major, minor); 469b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 470b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 471b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross make_link(devpath, links[i]); 472b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 475eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!strcmp(action, "remove")) { 476b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 477b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 478b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross remove_link(devpath, links[i]); 479b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 4804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project unlink(devpath); 481b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross } 482b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross 483b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross if (links) { 484b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross for (i = 0; links[i]; i++) 485b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links[i]); 486b0ab94b7d5a888f0b6920b156e5c6a075fa0741aColin Cross free(links); 4874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 4884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 4894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 490fadb85e3bd333653014df5fcc931d844dc8c3630Colin Crossstatic void handle_platform_device_event(struct uevent *uevent) 491fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross{ 492fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross const char *name = uevent->path + 18; /* length of /devices/platform/ */ 493fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 494fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross if (!strcmp(uevent->action, "add")) 495fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross add_platform_device(name); 496fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross else if (!strcmp(uevent->action, "remove")) 497fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross remove_platform_device(name); 498fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross} 499fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross 500eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic const char *parse_device_name(struct uevent *uevent, unsigned int len) 501eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 502eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 503eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 504eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* if it's not a /dev device, nothing else to do */ 505eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if((uevent->major < 0) || (uevent->minor < 0)) 506eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 507eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 508eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* do we have a name? */ 509eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = strrchr(uevent->path, '/'); 510eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(!name) 511eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 512eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name++; 513eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 514eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* too-long names would overrun our buffer */ 515eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if(strlen(name) > len) 516eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return NULL; 517eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 518eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return name; 519eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 520eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 521eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_block_device_event(struct uevent *uevent) 522eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 523eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *base = "/dev/block/"; 524eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 525eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96]; 526eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 527eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 528eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 529eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 530eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 531eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 532eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 533e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 534eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 535eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->path, "/devices/platform/", 18)) 536eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = parse_platform_block_device(uevent); 537eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 538eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 1, 539eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 540eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 541eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 542eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_generic_device_event(struct uevent *uevent) 543eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 544eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char *base; 545eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross const char *name; 546eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char devpath[96] = {0}; 547eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross char **links = NULL; 548eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 549eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name = parse_device_name(uevent, 64); 550eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!name) 551eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 552eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 553eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "usb", 3)) { 554eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->subsystem, "usb")) { 555f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong if (uevent->device_name) { 556f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* 557f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * create device node provided by kernel if present 558f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * see drivers/base/core.c 559f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong */ 560f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong char *p = devpath; 561f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong snprintf(devpath, sizeof(devpath), "/dev/%s", uevent->device_name); 562f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* skip leading /dev/ */ 563f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong p += 5; 564f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* build directories */ 565f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong while (*p) { 566f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong if (*p == '/') { 567f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong *p = 0; 568f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir(devpath, 0755); 569f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong *p = '/'; 570f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 571f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong p++; 572f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 573f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 574f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong else { 575f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* This imitates the file system that would be created 576f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * if we were using devfs instead. 577f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong * Minors are broken up into groups of 128, starting at "001" 578f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong */ 579f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong int bus_id = uevent->minor / 128 + 1; 580f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong int device_id = uevent->minor % 128 + 1; 581f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong /* build directories */ 582f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir("/dev/bus", 0755); 583f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir("/dev/bus/usb", 0755); 584f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id); 585f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong make_dir(devpath, 0755); 586f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id); 587f97b887848cc64e7d88d27f198b7721c9f2f8ec8Wei Zhong } 588eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 589eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross /* ignore other USB events */ 590eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross return; 591eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 592eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "graphics", 8)) { 593eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/graphics/"; 594e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 595e6f8d45da8c61d67dc9fdc1cec53f40594043817Lukasz Anaczkowski } else if (!strncmp(uevent->subsystem, "drm", 3)) { 596e6f8d45da8c61d67dc9fdc1cec53f40594043817Lukasz Anaczkowski base = "/dev/dri/"; 597e6f8d45da8c61d67dc9fdc1cec53f40594043817Lukasz Anaczkowski make_dir(base, 0755); 598eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "oncrpc", 6)) { 599eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/oncrpc/"; 600e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 601eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "adsp", 4)) { 602eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/adsp/"; 603e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 604eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if (!strncmp(uevent->subsystem, "msm_camera", 10)) { 605eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/msm_camera/"; 606e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 607eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "input", 5)) { 608eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/input/"; 609e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 610eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "mtd", 3)) { 611eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/mtd/"; 612e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 613eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "sound", 5)) { 614eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/snd/"; 615e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 616eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else if(!strncmp(uevent->subsystem, "misc", 4) && 617eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross !strncmp(name, "log_", 4)) { 618eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/log/"; 619e46f9d510db9351682cf17c49115110870147335Stephen Smalley make_dir(base, 0755); 620eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross name += 4; 621eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else 622eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross base = "/dev/"; 623eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross links = get_character_device_symlinks(uevent); 624eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 625eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!devpath[0]) 626eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross snprintf(devpath, sizeof(devpath), "%s%s", base, name); 627eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 628eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_device(uevent->action, devpath, uevent->path, 0, 629eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross uevent->major, uevent->minor, links); 630eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 631eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 632eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Crossstatic void handle_device_event(struct uevent *uevent) 633eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross{ 634eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strcmp(uevent->action,"add")) 635eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross fixup_sys_perms(uevent->path); 636eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 637eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross if (!strncmp(uevent->subsystem, "block", 5)) { 638eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_block_device_event(uevent); 639fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross } else if (!strncmp(uevent->subsystem, "platform", 8)) { 640fadb85e3bd333653014df5fcc931d844dc8c3630Colin Cross handle_platform_device_event(uevent); 641eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } else { 642eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross handle_generic_device_event(uevent); 643eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross } 644eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross} 645eb5ba8306522acdbf3a63ca847e5e6b990d842b9Colin Cross 6464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic int load_firmware(int fw_fd, int loading_fd, int data_fd) 6474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 6484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct stat st; 6494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project long len_to_copy; 6504f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int ret = 0; 6514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fstat(fw_fd, &st) < 0) 6534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return -1; 6544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy = st.st_size; 6554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6564f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "1", 1); /* start transfer */ 6574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (len_to_copy > 0) { 6594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project char buf[PAGE_SIZE]; 6604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nr; 6614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr = read(fw_fd, buf, sizeof(buf)); 6634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!nr) 6644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6654f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nr < 0) { 6664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project break; 6684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project len_to_copy -= nr; 6714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while (nr > 0) { 6724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ssize_t nw = 0; 6734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nw = write(data_fd, buf + nw, nr); 6754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(nw <= 0) { 6764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project ret = -1; 6774f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto out; 6784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project nr -= nw; 6804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 6824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectout: 6844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!ret) 6854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "0", 1); /* successful end of transfer */ 6864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 6874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(loading_fd, "-1", 2); /* abort transfer */ 6884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return ret; 6904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 6914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 6928d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandstatic int is_booting(void) 6938d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland{ 6948d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland return access("/dev/.booting", F_OK) == 0; 6958d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland} 6968d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland 6974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void process_firmware_event(struct uevent *uevent) 6984f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 69902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland char *root, *loading, *data, *file1 = NULL, *file2 = NULL; 7004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int l, loading_fd, data_fd, fw_fd; 7018d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland int booting = is_booting(); 7024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7038d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: loading '%s' for '%s'\n", 7048d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland uevent->firmware, uevent->path); 7054f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path); 7074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&loading, "%sloading", root); 7114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto root_free_out; 7134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project l = asprintf(&data, "%sdata", root); 7154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_free_out; 7174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 71802863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware); 71902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if (l == -1) 72002863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_free_out; 72102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland 72202863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware); 7234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (l == -1) 7244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto data_free_out; 7254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project loading_fd = open(loading, O_WRONLY); 7274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(loading_fd < 0) 7284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto file_free_out; 7294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project data_fd = open(data, O_WRONLY); 7314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(data_fd < 0) 7324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project goto loading_close_out; 7334f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7348d48c8e45724c7103f0ace7885d339e49399908bBrian Swetlandtry_loading_again: 73502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file1, O_RDONLY); 73602863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland if(fw_fd < 0) { 73702863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland fw_fd = open(file2, O_RDONLY); 738609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby if (fw_fd < 0) { 7398d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland if (booting) { 7408d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland /* If we're not fully booted, we may be missing 7418d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland * filesystems needed for firmware, wait and retry. 7428d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland */ 7438d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland usleep(100000); 7448d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland booting = is_booting(); 7458d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland goto try_loading_again; 7468d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland } 7478d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: could not open '%s' %d\n", uevent->firmware, errno); 748609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby write(loading_fd, "-1", 2); 74902863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland goto data_close_out; 750609d8828d3b8266a80606bf902d1294296962cf3Benoit Goby } 75102863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland } 7524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(!load_firmware(fw_fd, loading_fd, data_fd)) 7548d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy success { '%s', '%s' }\n", root, uevent->firmware); 7554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else 7568d48c8e45724c7103f0ace7885d339e49399908bBrian Swetland INFO("firmware: copy failure { '%s', '%s' }\n", root, uevent->firmware); 7574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fw_fd); 7594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_close_out: 7604f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(data_fd); 7614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_close_out: 7624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(loading_fd); 7634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectfile_free_out: 76402863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file1); 76502863b957cfbfc302d3136ed78c0cba86accacd8Brian Swetland free(file2); 7664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectdata_free_out: 7674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(data); 7684f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectloading_free_out: 7694f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(loading); 7704f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectroot_free_out: 7714f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project free(root); 7724f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7734f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7744f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Projectstatic void handle_firmware_event(struct uevent *uevent) 7754f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7764f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid_t pid; 777982a815c10cc28707d81c46112fc45b1c10df3beColin Cross int ret; 7784f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7794f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->subsystem, "firmware")) 7804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7814f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7824f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(strcmp(uevent->action, "add")) 7834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project return; 7844f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7854f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project /* we fork, to avoid making large memory allocations in init proper */ 7864f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project pid = fork(); 7874f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if (!pid) { 7884f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project process_firmware_event(uevent); 7894f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project exit(EXIT_SUCCESS); 7904f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 7914f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 7924f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 7934f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project#define UEVENT_MSG_LEN 1024 7940dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid handle_device_fd() 7954f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 7963f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang char msg[UEVENT_MSG_LEN+2]; 7973f582e92f07d358f3d0941b86407b39e2e7e67ccVernon Tang int n; 79857de8b8f27f887ca8084671df777a4ac199ba647Nick Kralevich while ((n = uevent_kernel_multicast_recv(device_fd, msg, UEVENT_MSG_LEN)) > 0) { 7995f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich if(n >= UEVENT_MSG_LEN) /* overflow -- discard */ 8004f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8024f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n] = '\0'; 8034f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project msg[n+1] = '\0'; 8044f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8055f5d5c8cef10f28950fa108a8bd86d55f11b7ef4Nick Kralevich struct uevent uevent; 8064f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project parse_event(msg, &uevent); 8074f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8084f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_device_event(&uevent); 8094f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project handle_firmware_event(&uevent); 8104f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8114f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8124f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8134f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project/* Coldboot walks parts of the /sys tree and pokes the uevent files 8144f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** to cause the kernel to regenerate device add events that happened 8154f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** before init's device manager was started 8164f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** 8174f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** We drain any pending events from the netlink socket every time 8184f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** we poke another uevent file to make sure we don't overrun the 8194f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project** socket's buffer. 8204f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project*/ 8214f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8220dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void do_coldboot(DIR *d) 8234f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8244f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project struct dirent *de; 8254f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project int dfd, fd; 8264f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8274f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project dfd = dirfd(d); 8284f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8294f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, "uevent", O_WRONLY); 8304f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd >= 0) { 8314f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project write(fd, "add\n", 4); 8324f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8330dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross handle_device_fd(); 8344f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8354f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8364f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project while((de = readdir(d))) { 8374f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d2; 8384f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8394f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(de->d_type != DT_DIR || de->d_name[0] == '.') 8404f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8414f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8424f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY); 8434f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(fd < 0) 8444f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project continue; 8454f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8464f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project d2 = fdopendir(fd); 8474f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d2 == 0) 8484f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project close(fd); 8494f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project else { 8500dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d2); 8514f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d2); 8524f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8534f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8544f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8554f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8560dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossstatic void coldboot(const char *path) 8574f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8584f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project DIR *d = opendir(path); 8594f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project if(d) { 8600dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross do_coldboot(d); 8614f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project closedir(d); 8624f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project } 8634f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 8644f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8650dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossvoid device_init(void) 8664f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project{ 8674f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project suseconds_t t0, t1; 868f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross struct stat info; 869f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross int fd; 870b5982bf7c65b30be981ecfe1847437b05e32b2bbKenny Root 871ae6f3d7c05070f7e0e56fe0056c8923c6ee2f473Stephen Smalley sehandle = NULL; 872ae6f3d7c05070f7e0e56fe0056c8923c6ee2f473Stephen Smalley if (is_selinux_enabled() > 0) { 873ae6f3d7c05070f7e0e56fe0056c8923c6ee2f473Stephen Smalley sehandle = selinux_android_file_context_handle(); 874ae6f3d7c05070f7e0e56fe0056c8923c6ee2f473Stephen Smalley } 875b5982bf7c65b30be981ecfe1847437b05e32b2bbKenny Root 8762d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin /* is 64K enough? udev uses 16MB! */ 8772d55e02d0f3c27f0c99ab889ab7b73126280a21cDima Zavin device_fd = uevent_open_socket(64*1024, true); 8780dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross if(device_fd < 0) 8790dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return; 8804f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8810dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFD, FD_CLOEXEC); 8820dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross fcntl(device_fd, F_SETFL, O_NONBLOCK); 8834f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 884f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross if (stat(coldboot_done, &info) < 0) { 885f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t0 = get_usecs(); 886f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/class"); 887f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/block"); 888f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross coldboot("/sys/devices"); 889f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross t1 = get_usecs(); 890f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); 891f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross close(fd); 892f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); 893f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } else { 894f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross log_event_print("skipping coldboot, already done\n"); 895f83d0b9af5cbe4440cc41ceaa8a7806a13c86282Colin Cross } 8960dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross} 8974f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project 8980dd7ca6e87abb689700c5e3a816a949b03b1154bColin Crossint get_device_fd() 8990dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross{ 9000dd7ca6e87abb689700c5e3a816a949b03b1154bColin Cross return device_fd; 9014f6e8d7a00cbeda1e70cc15be9c4af1018bdad5The Android Open Source Project} 902