Call ioctl before each write on retry
If the update is a retry, ioctl(BLKDISCARD) the destination blocks before
writing to these blocks.
Bug: 28990135
Change-Id: I1e703808e68ebb1292cd66afd76be8fd6946ee59
diff --git a/edify/expr.h b/edify/expr.h
index 5c06de8..8863479 100644
--- a/edify/expr.h
+++ b/edify/expr.h
@@ -49,6 +49,8 @@
// in addition to the error code.
CauseCode cause_code = kNoCause;
+ bool is_retry = false;
+
} State;
#define VAL_STRING 1 // data will be NULL-terminated; size doesn't count null
diff --git a/install.cpp b/install.cpp
index 5732852..d5c5583 100644
--- a/install.cpp
+++ b/install.cpp
@@ -56,7 +56,7 @@
// If the package contains an update binary, extract it and run it.
static int
try_update_binary(const char* path, ZipArchive* zip, bool* wipe_cache,
- std::vector<std::string>& log_buffer)
+ std::vector<std::string>& log_buffer, int retry_count)
{
const ZipEntry* binary_entry =
mzFindZipEntry(zip, ASSUMED_UPDATE_BINARY_NAME);
@@ -130,15 +130,19 @@
//
// - the name of the package zip file.
//
+ // - an optional argument "retry" if this update is a retry of a failed
+ // update attempt.
+ //
- const char** args = (const char**)malloc(sizeof(char*) * 5);
+ const char** args = (const char**)malloc(sizeof(char*) * 6);
args[0] = binary;
args[1] = EXPAND(RECOVERY_API_VERSION); // defined in Android.mk
char* temp = (char*)malloc(10);
sprintf(temp, "%d", pipefd[1]);
args[2] = temp;
args[3] = (char*)path;
- args[4] = NULL;
+ args[4] = retry_count > 0 ? "retry" : NULL;
+ args[5] = NULL;
pid_t pid = fork();
if (pid == 0) {
@@ -215,7 +219,7 @@
static int
really_install_package(const char *path, bool* wipe_cache, bool needs_mount,
- std::vector<std::string>& log_buffer)
+ std::vector<std::string>& log_buffer, int retry_count)
{
ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
ui->Print("Finding update package...\n");
@@ -276,8 +280,11 @@
// Verify and install the contents of the package.
ui->Print("Installing update...\n");
+ if (retry_count > 0) {
+ ui->Print("Retry attempt: %d\n", retry_count);
+ }
ui->SetEnableReboot(false);
- int result = try_update_binary(path, &zip, wipe_cache, log_buffer);
+ int result = try_update_binary(path, &zip, wipe_cache, log_buffer, retry_count);
ui->SetEnableReboot(true);
ui->Print("\n");
@@ -306,7 +313,7 @@
LOGE("failed to set up expected mounts for install; aborting\n");
result = INSTALL_ERROR;
} else {
- result = really_install_package(path, wipe_cache, needs_mount, log_buffer);
+ result = really_install_package(path, wipe_cache, needs_mount, log_buffer, retry_count);
}
if (install_log != nullptr) {
fputc(result == INSTALL_SUCCESS ? '1' : '0', install_log);
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index 2efa1cd..f795556 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -70,6 +70,7 @@
};
static CauseCode failure_type = kNoCause;
+static bool is_retry = false;
static std::map<std::string, RangeSet> stash_map;
static void parse_range(const std::string& range_text, RangeSet& rs) {
@@ -179,6 +180,21 @@
return write_all(fd, buffer.data(), size);
}
+static bool discard_blocks(int fd, off64_t offset, uint64_t size) {
+ // Don't discard blocks unless the update is a retry run.
+ if (!is_retry) {
+ return true;
+ }
+
+ uint64_t args[2] = {static_cast<uint64_t>(offset), size};
+ int status = ioctl(fd, BLKDISCARD, &args);
+ if (status == -1) {
+ fprintf(stderr, "BLKDISCARD ioctl failed: %s\n", strerror(errno));
+ return false;
+ }
+ return true;
+}
+
static bool check_lseek(int fd, off64_t offset, int whence) {
off64_t rc = TEMP_FAILURE_RETRY(lseek64(fd, offset, whence));
if (rc == -1) {
@@ -238,10 +254,15 @@
rss->p_remain = (rss->tgt.pos[rss->p_block * 2 + 1] -
rss->tgt.pos[rss->p_block * 2]) * BLOCKSIZE;
- if (!check_lseek(rss->fd, (off64_t)rss->tgt.pos[rss->p_block*2] * BLOCKSIZE,
- SEEK_SET)) {
+ off64_t offset = static_cast<off64_t>(rss->tgt.pos[rss->p_block*2]) * BLOCKSIZE;
+ if (!discard_blocks(rss->fd, offset, rss->p_remain)) {
break;
}
+
+ if (!check_lseek(rss->fd, offset, SEEK_SET)) {
+ break;
+ }
+
} else {
// we can't write any more; return how many bytes have
// been written so far.
@@ -347,11 +368,15 @@
size_t p = 0;
for (size_t i = 0; i < tgt.count; ++i) {
- if (!check_lseek(fd, (off64_t) tgt.pos[i * 2] * BLOCKSIZE, SEEK_SET)) {
+ off64_t offset = static_cast<off64_t>(tgt.pos[i * 2]) * BLOCKSIZE;
+ size_t size = (tgt.pos[i * 2 + 1] - tgt.pos[i * 2]) * BLOCKSIZE;
+ if (!discard_blocks(fd, offset, size)) {
return -1;
}
- size_t size = (tgt.pos[i * 2 + 1] - tgt.pos[i * 2]) * BLOCKSIZE;
+ if (!check_lseek(fd, offset, SEEK_SET)) {
+ return -1;
+ }
if (write_all(fd, data + p, size) == -1) {
return -1;
@@ -1104,7 +1129,13 @@
if (params.canwrite) {
for (size_t i = 0; i < tgt.count; ++i) {
- if (!check_lseek(params.fd, (off64_t) tgt.pos[i * 2] * BLOCKSIZE, SEEK_SET)) {
+ off64_t offset = static_cast<off64_t>(tgt.pos[i * 2]) * BLOCKSIZE;
+ size_t size = (tgt.pos[i * 2 + 1] - tgt.pos[i * 2]) * BLOCKSIZE;
+ if (!discard_blocks(params.fd, offset, size)) {
+ return -1;
+ }
+
+ if (!check_lseek(params.fd, offset, SEEK_SET)) {
return -1;
}
@@ -1143,7 +1174,12 @@
rss.p_block = 0;
rss.p_remain = (tgt.pos[1] - tgt.pos[0]) * BLOCKSIZE;
- if (!check_lseek(params.fd, (off64_t) tgt.pos[0] * BLOCKSIZE, SEEK_SET)) {
+ off64_t offset = static_cast<off64_t>(tgt.pos[0]) * BLOCKSIZE;
+ if (!discard_blocks(params.fd, offset, tgt.size * BLOCKSIZE)) {
+ return -1;
+ }
+
+ if (!check_lseek(params.fd, offset, SEEK_SET)) {
return -1;
}
@@ -1221,7 +1257,12 @@
rss.p_block = 0;
rss.p_remain = (tgt.pos[1] - tgt.pos[0]) * BLOCKSIZE;
- if (!check_lseek(params.fd, (off64_t) tgt.pos[0] * BLOCKSIZE, SEEK_SET)) {
+ off64_t offset = static_cast<off64_t>(tgt.pos[0]) * BLOCKSIZE;
+ if (!discard_blocks(params.fd, offset, rss.p_remain)) {
+ return -1;
+ }
+
+ if (!check_lseek(params.fd, offset, SEEK_SET)) {
return -1;
}
@@ -1340,6 +1381,10 @@
params.canwrite = !dryrun;
fprintf(stderr, "performing %s\n", dryrun ? "verification" : "update");
+ if (state->is_retry) {
+ is_retry = true;
+ fprintf(stderr, "This update is a retry.\n");
+ }
Value* blockdev_filename = nullptr;
Value* transfer_list_value = nullptr;
diff --git a/updater/updater.cpp b/updater/updater.cpp
index b5db71e..e956dd5 100644
--- a/updater/updater.cpp
+++ b/updater/updater.cpp
@@ -48,7 +48,7 @@
setbuf(stdout, NULL);
setbuf(stderr, NULL);
- if (argc != 4) {
+ if (argc != 4 && argc != 5) {
printf("unexpected number of arguments (%d)\n", argc);
return 1;
}
@@ -142,6 +142,14 @@
state.script = script;
state.errmsg = NULL;
+ if (argc == 5) {
+ if (strcmp(argv[4], "retry") == 0) {
+ state.is_retry = true;
+ } else {
+ printf("unexpected argument: %s", argv[4]);
+ }
+ }
+
char* result = Evaluate(&state, root);
if (have_eio_error) {
