Have vold grab a partial wakelock when encrypting
The Progress bar UI grabs a full wakelock when encrypting, but we've seen
a case where it looks like the progress bar UI crashes, and the wakelock is
lost, and then all hell breaks loose. The enablecrypto command has a lot of
work to do, and it will take some time, so it should grab a wakelock to
ensure it can finish without being interrupted and put to sleep.
It grabs a partial wake lock, as it doesn't need the screen to be on to do
its work. If the UI wants to keep it on, it should also grab a full wakelock,
which it does. If the UI crashes, the screen may turn off, but the encryption
will keep going, and vold will reboot the device when it's done.
Change-Id: I51d3a72b8c77383044a3facb1604c1ee510733ae
diff --git a/cryptfs.c b/cryptfs.c
index afba726..f57b717 100644
--- a/cryptfs.c
+++ b/cryptfs.c
@@ -41,6 +41,7 @@
#define LOG_TAG "Cryptfs"
#include "cutils/log.h"
#include "cutils/properties.h"
+#include "hardware_legacy/power.h"
#define DM_CRYPT_BUF_SIZE 4096
#define DATA_MNT_POINT "/data"
@@ -897,6 +898,7 @@
struct crypt_mnt_ftr crypt_ftr;
char tmpfs_options[80];
char encrypted_state[32];
+ char lockid[32] = { 0 };
property_get("ro.crypto.state", encrypted_state, "");
if (strcmp(encrypted_state, "unencrypted")) {
@@ -936,6 +938,13 @@
}
}
+ /* Get a wakelock as this may take a while, and we don't want the
+ * device to sleep on us. We'll grab a partial wakelock, and if the UI
+ * wants to keep the screen on, it can grab a full wakelock.
+ */
+ snprintf(lockid, 32, "enablecrypto%d", (int) getpid());
+ acquire_wake_lock(PARTIAL_WAKE_LOCK, lockid);
+
/* The init files are setup to stop the class main and late start when
* vold sets trigger_shutdown_framework.
*/
@@ -1020,6 +1029,7 @@
reboot(LINUX_REBOOT_CMD_RESTART);
} else {
property_set("vold.encrypt_progress", "error_partially_encrypted");
+ release_wake_lock(lockid);
return -1;
}
@@ -1028,10 +1038,14 @@
* Set the property and return. Hope the framework can deal with it.
*/
property_set("vold.encrypt_progress", "error_reboot_failed");
+ release_wake_lock(lockid);
return rc;
error_unencrypted:
property_set("vold.encrypt_progress", "error_not_encrypted");
+ if (lockid[0]) {
+ release_wake_lock(lockid);
+ }
return -1;
error_shutting_down:
@@ -1045,6 +1059,9 @@
/* shouldn't get here */
property_set("vold.encrypt_progress", "error_shutting_down");
+ if (lockid[0]) {
+ release_wake_lock(lockid);
+ }
return -1;
}