tequilaOS/platform_system_vold
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vold: add coldboot back and make sure it won't block booting

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coldboot is needed when device rebooted with USB device attched
so Vold netlink won't miss the information.
This CL added back coldboot and moved down so that it won't block
vold cl and ccl threads.

Bug: 36007238
Test: reboot marlin with flash drive attached and flash drive is recognized
Change-Id: Ie39f348e97a8500515e394e386541289a91b2425
This commit is contained in:
Wei Wang 2017-03-06 17:27:05 -08:00
parent bf8518056d
commit 2edbe28add
1 changed files with 49 additions and 0 deletions
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49
main.cpp
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@ -36,9 +36,11 @@
#include <sys/types.h>
#include <getopt.h>
#include <fcntl.h>
#include <dirent.h>
#include <fs_mgr.h>
static int process_config(VolumeManager *vm, bool* has_adoptable);
static void coldboot(const char *path);
static void parse_args(int argc, char** argv);
struct fstab *fstab;
@ -132,6 +134,10 @@ int main(int argc, char** argv) {
// a deadlock between vold and init (see b/34278978 for details)
property_set("vold.has_adoptable", has_adoptable ? "1" : "0");
// Do coldboot here so it won't block booting,
// also the cold boot is needed in case we have flash drive
// connected before Vold launched
coldboot("/sys/block");
// Eventually we'll become the monitoring thread
while(1) {
pause();
@ -165,6 +171,49 @@ static void parse_args(int argc, char** argv) {
CHECK(android::vold::sFsckUntrustedContext != nullptr);
}
static void do_coldboot(DIR *d, int lvl) {
struct dirent *de;
int dfd, fd;
dfd = dirfd(d);
fd = openat(dfd, "uevent", O_WRONLY | O_CLOEXEC);
if(fd >= 0) {
write(fd, "add\n", 4);
close(fd);
}
while((de = readdir(d))) {
DIR *d2;
if (de->d_name[0] == '.')
continue;
if (de->d_type != DT_DIR && lvl > 0)
continue;
fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
if(fd < 0)
continue;
d2 = fdopendir(fd);
if(d2 == 0)
close(fd);
else {
do_coldboot(d2, lvl + 1);
closedir(d2);
}
}
}
static void coldboot(const char *path) {
DIR *d = opendir(path);
if(d) {
do_coldboot(d, 0);
closedir(d);
}
}
static int process_config(VolumeManager *vm, bool* has_adoptable) {
std::string path(android::vold::DefaultFstabPath());
fstab = fs_mgr_read_fstab(path.c_str());