diff options
Diffstat (limited to 'init/devices.c')
| -rw-r--r-- | init/devices.c | 339 |
1 files changed, 155 insertions, 184 deletions
diff --git a/init/devices.c b/init/devices.c index 8789b89..663cdfe 100644 --- a/init/devices.c +++ b/init/devices.c @@ -32,19 +32,23 @@ #include <sys/time.h> #include <asm/page.h> -#include "init.h" #include "devices.h" +#include "util.h" +#include "log.h" +#include "list.h" -#define CMDLINE_PREFIX "/dev" #define SYSFS_PREFIX "/sys" #define FIRMWARE_DIR "/etc/firmware" -#define MAX_QEMU_PERM 6 + +static int device_fd = -1; struct uevent { const char *action; const char *path; const char *subsystem; const char *firmware; + const char *partition_name; + int partition_num; int major; int minor; }; @@ -81,103 +85,21 @@ struct perms_ { unsigned int gid; unsigned short prefix; }; -static struct perms_ devperms[] = { - { "/dev/null", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/zero", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/full", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/ptmx", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/tty", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/random", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/urandom", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/ashmem", 0666, AID_ROOT, AID_ROOT, 0 }, - { "/dev/binder", 0666, AID_ROOT, AID_ROOT, 0 }, - - /* logger should be world writable (for logging) but not readable */ - { "/dev/log/", 0662, AID_ROOT, AID_LOG, 1 }, - - /* the msm hw3d client device node is world writable/readable. */ - { "/dev/msm_hw3dc", 0666, AID_ROOT, AID_ROOT, 0 }, - - /* gpu driver for adreno200 is globally accessible */ - { "/dev/kgsl", 0666, AID_ROOT, AID_ROOT, 0 }, - - /* these should not be world writable */ - { "/dev/diag", 0660, AID_RADIO, AID_RADIO, 0 }, - { "/dev/diag_arm9", 0660, AID_RADIO, AID_RADIO, 0 }, - { "/dev/android_adb", 0660, AID_ADB, AID_ADB, 0 }, - { "/dev/android_adb_enable", 0660, AID_ADB, AID_ADB, 0 }, - { "/dev/ttyMSM0", 0600, AID_BLUETOOTH, AID_BLUETOOTH, 0 }, - { "/dev/ttyHS0", 0600, AID_BLUETOOTH, AID_BLUETOOTH, 0 }, - { "/dev/uinput", 0660, AID_SYSTEM, AID_BLUETOOTH, 0 }, - { "/dev/alarm", 0664, AID_SYSTEM, AID_RADIO, 0 }, - { "/dev/tty0", 0660, AID_ROOT, AID_SYSTEM, 0 }, - { "/dev/graphics/", 0660, AID_ROOT, AID_GRAPHICS, 1 }, - { "/dev/msm_hw3dm", 0660, AID_SYSTEM, AID_GRAPHICS, 0 }, - { "/dev/input/", 0660, AID_ROOT, AID_INPUT, 1 }, - { "/dev/eac", 0660, AID_ROOT, AID_AUDIO, 0 }, - { "/dev/cam", 0660, AID_ROOT, AID_CAMERA, 0 }, - { "/dev/pmem", 0660, AID_SYSTEM, AID_GRAPHICS, 0 }, - { "/dev/pmem_adsp", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/pmem_camera", 0660, AID_SYSTEM, AID_CAMERA, 1 }, - { "/dev/oncrpc/", 0660, AID_ROOT, AID_SYSTEM, 1 }, - { "/dev/adsp/", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/snd/", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/mt9t013", 0660, AID_SYSTEM, AID_SYSTEM, 0 }, - { "/dev/msm_camera/", 0660, AID_SYSTEM, AID_SYSTEM, 1 }, - { "/dev/akm8976_daemon",0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/akm8976_aot", 0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/akm8973_daemon",0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/akm8973_aot", 0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/bma150", 0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/cm3602", 0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/akm8976_pffd", 0640, AID_COMPASS, AID_SYSTEM, 0 }, - { "/dev/lightsensor", 0640, AID_SYSTEM, AID_SYSTEM, 0 }, - { "/dev/msm_pcm_out", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/msm_pcm_in", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/msm_pcm_ctl", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/msm_snd", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/msm_mp3", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/audience_a1026", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/tpa2018d1", 0660, AID_SYSTEM, AID_AUDIO, 1 }, - { "/dev/msm_audpre", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/msm_audio_ctl", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/htc-acoustic", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/vdec", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/q6venc", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/snd/dsp", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/snd/dsp1", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/snd/mixer", 0660, AID_SYSTEM, AID_AUDIO, 0 }, - { "/dev/smd0", 0640, AID_RADIO, AID_RADIO, 0 }, - { "/dev/qemu_trace", 0666, AID_SYSTEM, AID_SYSTEM, 0 }, - { "/dev/qmi", 0640, AID_RADIO, AID_RADIO, 0 }, - { "/dev/qmi0", 0640, AID_RADIO, AID_RADIO, 0 }, - { "/dev/qmi1", 0640, AID_RADIO, AID_RADIO, 0 }, - { "/dev/qmi2", 0640, AID_RADIO, AID_RADIO, 0 }, - /* CDMA radio interface MUX */ - { "/dev/ts0710mux", 0640, AID_RADIO, AID_RADIO, 1 }, - { "/dev/ppp", 0660, AID_RADIO, AID_VPN, 0 }, - { "/dev/tun", 0640, AID_VPN, AID_VPN, 0 }, - { "/dev/bus/usb/", 0660, AID_ROOT, AID_USB, 1 }, - { NULL, 0, 0, 0, 0 }, -}; -/* devperms_partners list and perm_node are for hardware specific /dev entries */ struct perm_node { struct perms_ dp; struct listnode plist; }; -list_declare(devperms_partners); +static list_declare(dev_perms); /* * Permission override when in emulator mode, must be parsed before * system properties is initalized. */ -static int qemu_perm_count; -static struct perms_ qemu_perms[MAX_QEMU_PERM + 1]; - -int add_devperms_partners(const char *name, mode_t perm, unsigned int uid, - unsigned int gid, unsigned short prefix) { +int add_dev_perms(const char *name, mode_t perm, unsigned int uid, + unsigned int gid, unsigned short prefix) { int size; + char *tmp = 0; struct perm_node *node = malloc(sizeof (struct perm_node)); if (!node) return -ENOMEM; @@ -192,51 +114,10 @@ int add_devperms_partners(const char *name, mode_t perm, unsigned int uid, node->dp.gid = gid; node->dp.prefix = prefix; - list_add_tail(&devperms_partners, &node->plist); + list_add_tail(&dev_perms, &node->plist); return 0; } -void qemu_init(void) { - qemu_perm_count = 0; - memset(&qemu_perms, 0, sizeof(qemu_perms)); -} - -static int qemu_perm(const char* name, mode_t perm, unsigned int uid, - unsigned int gid, unsigned short prefix) -{ - char *buf; - if (qemu_perm_count == MAX_QEMU_PERM) - return -ENOSPC; - - buf = malloc(strlen(name) + 1); - if (!buf) - return -errno; - - strlcpy(buf, name, strlen(name) + 1); - qemu_perms[qemu_perm_count].name = buf; - qemu_perms[qemu_perm_count].perm = perm; - qemu_perms[qemu_perm_count].uid = uid; - qemu_perms[qemu_perm_count].gid = gid; - qemu_perms[qemu_perm_count].prefix = prefix; - - qemu_perm_count++; - return 0; -} - -/* Permission overrides for emulator that are parsed from /proc/cmdline. */ -void qemu_cmdline(const char* name, const char *value) -{ - char *buf; - if (!strcmp(name, "android.ril")) { - /* cmd line params currently assume /dev/ prefix */ - if (asprintf(&buf, CMDLINE_PREFIX"/%s", value) == -1) { - return; - } - INFO("nani- buf:: %s\n", buf); - qemu_perm(buf, 0660, AID_RADIO, AID_ROOT, 0); - } -} - static int get_device_perm_inner(struct perms_ *perms, const char *path, unsigned *uid, unsigned *gid, mode_t *perm) { @@ -262,38 +143,32 @@ static int get_device_perm_inner(struct perms_ *perms, const char *path, static mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid) { mode_t perm; - - if (get_device_perm_inner(qemu_perms, path, uid, gid, &perm) == 0) { - return perm; - } else if (get_device_perm_inner(devperms, path, uid, gid, &perm) == 0) { - return perm; - } else { - struct listnode *node; - struct perm_node *perm_node; - struct perms_ *dp; - - /* Check partners list. */ - list_for_each(node, &devperms_partners) { - perm_node = node_to_item(node, struct perm_node, plist); - dp = &perm_node->dp; - - if (dp->prefix) { - if (strncmp(path, dp->name, strlen(dp->name))) - continue; - } else { - if (strcmp(path, dp->name)) - continue; - } - /* Found perm in partner list. */ - *uid = dp->uid; - *gid = dp->gid; - return dp->perm; + struct listnode *node; + struct perm_node *perm_node; + struct perms_ *dp; + + /* search the perms list in reverse so that ueventd.$hardware can + * override ueventd.rc + */ + list_for_each_reverse(node, &dev_perms) { + perm_node = node_to_item(node, struct perm_node, plist); + dp = &perm_node->dp; + + if (dp->prefix) { + if (strncmp(path, dp->name, strlen(dp->name))) + continue; + } else { + if (strcmp(path, dp->name)) + continue; } - /* Default if nothing found. */ - *uid = 0; - *gid = 0; - return 0600; + *uid = dp->uid; + *gid = dp->gid; + return dp->perm; } + /* Default if nothing found. */ + *uid = 0; + *gid = 0; + return 0600; } static void make_device(const char *path, int block, int major, int minor) @@ -345,6 +220,8 @@ static void parse_event(const char *msg, struct uevent *uevent) uevent->firmware = ""; uevent->major = -1; uevent->minor = -1; + uevent->partition_name = NULL; + uevent->partition_num = -1; /* currently ignoring SEQNUM */ while(*msg) { @@ -366,6 +243,12 @@ static void parse_event(const char *msg, struct uevent *uevent) } else if(!strncmp(msg, "MINOR=", 6)) { msg += 6; uevent->minor = atoi(msg); + } else if(!strncmp(msg, "PARTN=", 6)) { + msg += 6; + uevent->partition_num = atoi(msg); + } else if(!strncmp(msg, "PARTNAME=", 9)) { + msg += 9; + uevent->partition_name = msg; } /* advance to after the next \0 */ @@ -378,12 +261,77 @@ static void parse_event(const char *msg, struct uevent *uevent) uevent->firmware, uevent->major, uevent->minor); } +static char **parse_platform_block_device(struct uevent *uevent) +{ + const char *driver; + const char *path; + char *slash; + int width; + char buf[256]; + char link_path[256]; + int fd; + int link_num = 0; + int ret; + char *p; + unsigned int size; + struct stat info; + + char **links = malloc(sizeof(char *) * 4); + if (!links) + return NULL; + memset(links, 0, sizeof(char *) * 4); + + /* Drop "/devices/platform/" */ + path = uevent->path; + driver = path + 18; + slash = strchr(driver, '/'); + if (!slash) + goto err; + width = slash - driver; + if (width <= 0) + goto err; + + snprintf(link_path, sizeof(link_path), "/dev/block/platform/%.*s", + width, driver); + + if (uevent->partition_name) { + p = strdup(uevent->partition_name); + sanitize(p); + if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0) + link_num++; + else + links[link_num] = NULL; + free(p); + } + + if (uevent->partition_num >= 0) { + if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0) + link_num++; + else + links[link_num] = NULL; + } + + slash = strrchr(path, '/'); + if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0) + link_num++; + else + links[link_num] = NULL; + + return links; + +err: + free(links); + return NULL; +} + static void handle_device_event(struct uevent *uevent) { char devpath[96]; int devpath_ready = 0; char *base, *name; + char **links = NULL; int block; + int i; /* if it's not a /dev device, nothing to do */ if((uevent->major < 0) || (uevent->minor < 0)) @@ -404,6 +352,8 @@ static void handle_device_event(struct uevent *uevent) block = 1; base = "/dev/block/"; mkdir(base, 0755); + if (!strncmp(uevent->path, "/devices/platform/", 18)) + links = parse_platform_block_device(uevent); } else { block = 0; /* this should probably be configurable somehow */ @@ -461,12 +411,24 @@ static void handle_device_event(struct uevent *uevent) if(!strcmp(uevent->action, "add")) { make_device(devpath, block, uevent->major, uevent->minor); - return; + if (links) { + for (i = 0; links[i]; i++) + make_link(devpath, links[i]); + } } if(!strcmp(uevent->action, "remove")) { + if (links) { + for (i = 0; links[i]; i++) + remove_link(devpath, links[i]); + } unlink(devpath); - return; + } + + if (links) { + for (i = 0; links[i]; i++) + free(links[i]); + free(links); } } @@ -591,12 +553,12 @@ static void handle_firmware_event(struct uevent *uevent) } #define UEVENT_MSG_LEN 1024 -void handle_device_fd(int fd) +void handle_device_fd() { char msg[UEVENT_MSG_LEN+2]; int n; - while((n = recv(fd, msg, UEVENT_MSG_LEN, 0)) > 0) { + while((n = recv(device_fd, msg, UEVENT_MSG_LEN, 0)) > 0) { struct uevent uevent; if(n == UEVENT_MSG_LEN) /* overflow -- discard */ @@ -621,7 +583,7 @@ void handle_device_fd(int fd) ** socket's buffer. */ -static void do_coldboot(int event_fd, DIR *d) +static void do_coldboot(DIR *d) { struct dirent *de; int dfd, fd; @@ -632,7 +594,7 @@ static void do_coldboot(int event_fd, DIR *d) if(fd >= 0) { write(fd, "add\n", 4); close(fd); - handle_device_fd(event_fd); + handle_device_fd(); } while((de = readdir(d))) { @@ -649,40 +611,49 @@ static void do_coldboot(int event_fd, DIR *d) if(d2 == 0) close(fd); else { - do_coldboot(event_fd, d2); + do_coldboot(d2); closedir(d2); } } } -static void coldboot(int event_fd, const char *path) +static void coldboot(const char *path) { DIR *d = opendir(path); if(d) { - do_coldboot(event_fd, d); + do_coldboot(d); closedir(d); } } -int device_init(void) +void device_init(void) { suseconds_t t0, t1; + struct stat info; int fd; - fd = open_uevent_socket(); - if(fd < 0) - return -1; - - fcntl(fd, F_SETFD, FD_CLOEXEC); - fcntl(fd, F_SETFL, O_NONBLOCK); + device_fd = open_uevent_socket(); + if(device_fd < 0) + return; - t0 = get_usecs(); - coldboot(fd, "/sys/class"); - coldboot(fd, "/sys/block"); - coldboot(fd, "/sys/devices"); - t1 = get_usecs(); + fcntl(device_fd, F_SETFD, FD_CLOEXEC); + fcntl(device_fd, F_SETFL, O_NONBLOCK); - log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); + if (stat(coldboot_done, &info) < 0) { + t0 = get_usecs(); + coldboot("/sys/class"); + coldboot("/sys/block"); + coldboot("/sys/devices"); + t1 = get_usecs(); + fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000); + close(fd); + log_event_print("coldboot %ld uS\n", ((long) (t1 - t0))); + } else { + log_event_print("skipping coldboot, already done\n"); + } +} - return fd; +int get_device_fd() +{ + return device_fd; } |