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platform_system_core/fastboot/engine.cpp

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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "fastboot.h"
#include "fs.h"
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define OP_DOWNLOAD 1
#define OP_COMMAND 2
#define OP_QUERY 3
#define OP_NOTICE 4
#define OP_DOWNLOAD_SPARSE 5
#define OP_WAIT_FOR_DISCONNECT 6
typedef struct Action Action;
#define CMD_SIZE 64
struct Action {
unsigned op;
Action* next;
char cmd[CMD_SIZE];
const char* prod;
void* data;
// The protocol only supports 32-bit sizes, so you'll have to break
// anything larger into chunks.
uint32_t size;
const char *msg;
int (*func)(Action* a, int status, const char* resp);
double start;
};
static Action *action_list = 0;
static Action *action_last = 0;
int fb_getvar(struct usb_handle *usb, char *response, const char *fmt, ...)
{
char cmd[CMD_SIZE] = "getvar:";
int getvar_len = strlen(cmd);
va_list args;
response[FB_RESPONSE_SZ] = '\0';
va_start(args, fmt);
vsnprintf(cmd + getvar_len, sizeof(cmd) - getvar_len, fmt, args);
va_end(args);
cmd[CMD_SIZE - 1] = '\0';
return fb_command_response(usb, cmd, response);
}
/* Return true if this partition is supported by the fastboot format command.
* It is also used to determine if we should first erase a partition before
* flashing it with an ext4 filesystem. See needs_erase()
*
* Not all devices report the filesystem type, so don't report any errors,
* just return false.
*/
int fb_format_supported(usb_handle *usb, const char *partition, const char *type_override)
{
char fs_type[FB_RESPONSE_SZ + 1] = {0,};
int status;
if (type_override) {
return !!fs_get_generator(type_override);
}
status = fb_getvar(usb, fs_type, "partition-type:%s", partition);
if (status) {
return 0;
}
return !!fs_get_generator(fs_type);
}
static int cb_default(Action* a, int status, const char* resp) {
if (status) {
fprintf(stderr,"FAILED (%s)\n", resp);
} else {
double split = now();
fprintf(stderr,"OKAY [%7.3fs]\n", (split - a->start));
a->start = split;
}
return status;
}
static Action *queue_action(unsigned op, const char *fmt, ...)
{
va_list ap;
size_t cmdsize;
Action* a = reinterpret_cast<Action*>(calloc(1, sizeof(Action)));
if (a == nullptr) die("out of memory");
va_start(ap, fmt);
cmdsize = vsnprintf(a->cmd, sizeof(a->cmd), fmt, ap);
va_end(ap);
if (cmdsize >= sizeof(a->cmd)) {
free(a);
die("Command length (%d) exceeds maximum size (%d)", cmdsize, sizeof(a->cmd));
}
if (action_last) {
action_last->next = a;
} else {
action_list = a;
}
action_last = a;
a->op = op;
a->func = cb_default;
a->start = -1;
return a;
}
void fb_queue_erase(const char *ptn)
{
Action *a;
a = queue_action(OP_COMMAND, "erase:%s", ptn);
a->msg = mkmsg("erasing '%s'", ptn);
}
void fb_queue_flash(const char *ptn, void *data, unsigned sz)
{
Action *a;
a = queue_action(OP_DOWNLOAD, "");
a->data = data;
a->size = sz;
a->msg = mkmsg("sending '%s' (%d KB)", ptn, sz / 1024);
a = queue_action(OP_COMMAND, "flash:%s", ptn);
a->msg = mkmsg("writing '%s'", ptn);
}
void fb_queue_flash_sparse(const char *ptn, struct sparse_file *s, unsigned sz)
{
Action *a;
a = queue_action(OP_DOWNLOAD_SPARSE, "");
a->data = s;
a->size = 0;
a->msg = mkmsg("sending sparse '%s' (%d KB)", ptn, sz / 1024);
a = queue_action(OP_COMMAND, "flash:%s", ptn);
a->msg = mkmsg("writing '%s'", ptn);
}
static int match(const char* str, const char** value, unsigned count) {
unsigned n;
for (n = 0; n < count; n++) {
const char *val = value[n];
int len = strlen(val);
int match;
if ((len > 1) && (val[len-1] == '*')) {
len--;
match = !strncmp(val, str, len);
} else {
match = !strcmp(val, str);
}
if (match) return 1;
}
return 0;
}
static int cb_check(Action* a, int status, const char* resp, int invert)
{
const char** value = reinterpret_cast<const char**>(a->data);
unsigned count = a->size;
unsigned n;
int yes;
if (status) {
fprintf(stderr,"FAILED (%s)\n", resp);
return status;
}
if (a->prod) {
if (strcmp(a->prod, cur_product) != 0) {
double split = now();
fprintf(stderr,"IGNORE, product is %s required only for %s [%7.3fs]\n",
cur_product, a->prod, (split - a->start));
a->start = split;
return 0;
}
}
yes = match(resp, value, count);
if (invert) yes = !yes;
if (yes) {
double split = now();
fprintf(stderr,"OKAY [%7.3fs]\n", (split - a->start));
a->start = split;
return 0;
}
fprintf(stderr,"FAILED\n\n");
fprintf(stderr,"Device %s is '%s'.\n", a->cmd + 7, resp);
fprintf(stderr,"Update %s '%s'",
invert ? "rejects" : "requires", value[0]);
for (n = 1; n < count; n++) {
fprintf(stderr," or '%s'", value[n]);
}
fprintf(stderr,".\n\n");
return -1;
}
static int cb_require(Action*a, int status, const char* resp) {
return cb_check(a, status, resp, 0);
}
static int cb_reject(Action* a, int status, const char* resp) {
return cb_check(a, status, resp, 1);
}
void fb_queue_require(const char *prod, const char *var,
bool invert, size_t nvalues, const char **value)
{
Action *a;
a = queue_action(OP_QUERY, "getvar:%s", var);
a->prod = prod;
a->data = value;
a->size = nvalues;
a->msg = mkmsg("checking %s", var);
a->func = invert ? cb_reject : cb_require;
if (a->data == nullptr) die("out of memory");
}
static int cb_display(Action* a, int status, const char* resp) {
if (status) {
fprintf(stderr, "%s FAILED (%s)\n", a->cmd, resp);
return status;
}
fprintf(stderr, "%s: %s\n", (char*) a->data, resp);
return 0;
}
void fb_queue_display(const char *var, const char *prettyname)
{
Action *a;
a = queue_action(OP_QUERY, "getvar:%s", var);
a->data = strdup(prettyname);
if (a->data == nullptr) die("out of memory");
a->func = cb_display;
}
static int cb_save(Action* a, int status, const char* resp) {
if (status) {
fprintf(stderr, "%s FAILED (%s)\n", a->cmd, resp);
return status;
}
strncpy(reinterpret_cast<char*>(a->data), resp, a->size);
return 0;
}
void fb_queue_query_save(const char *var, char *dest, unsigned dest_size)
{
Action *a;
a = queue_action(OP_QUERY, "getvar:%s", var);
a->data = (void *)dest;
a->size = dest_size;
a->func = cb_save;
}
static int cb_do_nothing(Action*, int , const char*) {
fprintf(stderr,"\n");
return 0;
}
void fb_queue_reboot(void)
{
Action *a = queue_action(OP_COMMAND, "reboot");
a->func = cb_do_nothing;
a->msg = "rebooting";
}
void fb_queue_command(const char *cmd, const char *msg)
{
Action *a = queue_action(OP_COMMAND, cmd);
a->msg = msg;
}
void fb_queue_download(const char *name, void *data, unsigned size)
{
Action *a = queue_action(OP_DOWNLOAD, "");
a->data = data;
a->size = size;
a->msg = mkmsg("downloading '%s'", name);
}
void fb_queue_notice(const char *notice)
{
Action *a = queue_action(OP_NOTICE, "");
a->data = (void*) notice;
}
void fb_queue_wait_for_disconnect(void)
{
queue_action(OP_WAIT_FOR_DISCONNECT, "");
}
int fb_execute_queue(usb_handle *usb)
{
Action *a;
char resp[FB_RESPONSE_SZ+1];
int status = 0;
a = action_list;
if (!a)
return status;
resp[FB_RESPONSE_SZ] = 0;
double start = -1;
for (a = action_list; a; a = a->next) {
a->start = now();
if (start < 0) start = a->start;
if (a->msg) {
// fprintf(stderr,"%30s... ",a->msg);
fprintf(stderr,"%s...\n",a->msg);
}
if (a->op == OP_DOWNLOAD) {
status = fb_download_data(usb, a->data, a->size);
status = a->func(a, status, status ? fb_get_error() : "");
if (status) break;
} else if (a->op == OP_COMMAND) {
status = fb_command(usb, a->cmd);
status = a->func(a, status, status ? fb_get_error() : "");
if (status) break;
} else if (a->op == OP_QUERY) {
status = fb_command_response(usb, a->cmd, resp);
status = a->func(a, status, status ? fb_get_error() : resp);
if (status) break;
} else if (a->op == OP_NOTICE) {
fprintf(stderr,"%s\n",(char*)a->data);
} else if (a->op == OP_DOWNLOAD_SPARSE) {
status = fb_download_data_sparse(usb, reinterpret_cast<sparse_file*>(a->data));
status = a->func(a, status, status ? fb_get_error() : "");
if (status) break;
} else if (a->op == OP_WAIT_FOR_DISCONNECT) {
usb_wait_for_disconnect(usb);
} else {
die("bogus action");
}
}
fprintf(stderr,"finished. total time: %.3fs\n", (now() - start));
return status;
}
int fb_queue_is_empty(void)
{
return (action_list == nullptr);
}
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