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platform_system_core/fastboot/engine.c

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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 "make_ext4fs.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef USE_MINGW
#include <fcntl.h>
#else
#include <sys/mman.h>
#endif
extern struct fs_info info;
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
double now()
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (double)tv.tv_sec + (double)tv.tv_usec / 1000000;
}
char *mkmsg(const char *fmt, ...)
{
char buf[256];
char *s;
va_list ap;
va_start(ap, fmt);
vsprintf(buf, fmt, ap);
va_end(ap);
s = strdup(buf);
if (s == 0) die("out of memory");
return s;
}
#define OP_DOWNLOAD 1
#define OP_COMMAND 2
#define OP_QUERY 3
#define OP_NOTICE 4
#define OP_FORMAT 5
#define OP_DOWNLOAD_SPARSE 6
typedef struct Action Action;
#define CMD_SIZE 64
struct Action
{
unsigned op;
Action *next;
char cmd[CMD_SIZE];
const char *prod;
void *data;
unsigned size;
const char *msg;
int (*func)(Action *a, int status, char *resp);
double start;
};
static Action *action_list = 0;
static Action *action_last = 0;
struct image_data {
long long partition_size;
long long image_size; // real size of image file
void *buffer;
};
void generate_ext4_image(struct image_data *image);
void cleanup_image(struct image_data *image);
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);
}
struct generator {
char *fs_type;
/* generate image and return it as image->buffer.
* size of the buffer returned as image->image_size.
*
* image->partition_size specifies what is the size of the
* file partition we generate image for.
*/
void (*generate)(struct image_data *image);
/* it cleans the buffer allocated during image creation.
* this function probably does free() or munmap().
*/
void (*cleanup)(struct image_data *image);
} generators[] = {
{ "ext4", generate_ext4_image, cleanup_image }
};
/* 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)
{
char response[FB_RESPONSE_SZ+1];
struct generator *generator = NULL;
int status;
unsigned int i;
status = fb_getvar(usb, response, "partition-type:%s", partition);
if (status) {
return 0;
}
for (i = 0; i < ARRAY_SIZE(generators); i++) {
if (!strncmp(generators[i].fs_type, response, FB_RESPONSE_SZ)) {
generator = &generators[i];
break;
}
}
if (generator) {
return 1;
}
return 0;
}
static int cb_default(Action *a, int status, 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, ...)
{
Action *a;
va_list ap;
size_t cmdsize;
a = calloc(1, sizeof(Action));
if (a == 0) 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);
}
/* Loads file content into buffer. Returns NULL on error. */
static void *load_buffer(int fd, off_t size)
{
void *buffer;
#ifdef USE_MINGW
ssize_t count = 0;
// mmap is more efficient but mingw does not support it.
// In this case we read whole image into memory buffer.
buffer = malloc(size);
if (!buffer) {
perror("malloc");
return NULL;
}
lseek(fd, 0, SEEK_SET);
while(count < size) {
ssize_t actually_read = read(fd, (char*)buffer+count, size-count);
if (actually_read == 0) {
break;
}
if (actually_read < 0) {
if (errno == EINTR) {
continue;
}
perror("read");
free(buffer);
return NULL;
}
count += actually_read;
}
#else
buffer = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
if (buffer == MAP_FAILED) {
perror("mmap");
return NULL;
}
#endif
return buffer;
}
void cleanup_image(struct image_data *image)
{
#ifdef USE_MINGW
free(image->buffer);
#else
munmap(image->buffer, image->image_size);
#endif
}
void generate_ext4_image(struct image_data *image)
{
int fd;
struct stat st;
#ifdef USE_MINGW
/* Ideally we should use tmpfile() here, the same as with unix version.
* But unfortunately it is not portable as it is not clear whether this
* function opens file in TEXT or BINARY mode.
*
* There are also some reports it is buggy:
* http://pdplab.it.uom.gr/teaching/gcc_manuals/gnulib.html#tmpfile
* http://www.mega-nerd.com/erikd/Blog/Windiots/tmpfile.html
*/
char *filename = tempnam(getenv("TEMP"), "fastboot-format.img");
fd = open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0644);
unlink(filename);
#else
fd = fileno(tmpfile());
#endif
/* reset ext4fs info so we can be called multiple times */
reset_ext4fs_info();
info.len = image->partition_size;
make_ext4fs_internal(fd, NULL, NULL, NULL, 0, 1, 0, 0, 0, NULL);
fstat(fd, &st);
image->image_size = st.st_size;
image->buffer = load_buffer(fd, st.st_size);
close(fd);
}
int fb_format(Action *a, usb_handle *usb, int skip_if_not_supported)
{
const char *partition = a->cmd;
char response[FB_RESPONSE_SZ+1];
int status = 0;
struct image_data image;
struct generator *generator = NULL;
int fd;
unsigned i;
char cmd[CMD_SIZE];
status = fb_getvar(usb, response, "partition-type:%s", partition);
if (status) {
if (skip_if_not_supported) {
fprintf(stderr,
"Erase successful, but not automatically formatting.\n");
fprintf(stderr,
"Can't determine partition type.\n");
return 0;
}
fprintf(stderr,"FAILED (%s)\n", fb_get_error());
return status;
}
for (i = 0; i < ARRAY_SIZE(generators); i++) {
if (!strncmp(generators[i].fs_type, response, FB_RESPONSE_SZ)) {
generator = &generators[i];
break;
}
}
if (!generator) {
if (skip_if_not_supported) {
fprintf(stderr,
"Erase successful, but not automatically formatting.\n");
fprintf(stderr,
"File system type %s not supported.\n", response);
return 0;
}
fprintf(stderr,"Formatting is not supported for filesystem with type '%s'.\n",
response);
return -1;
}
status = fb_getvar(usb, response, "partition-size:%s", partition);
if (status) {
if (skip_if_not_supported) {
fprintf(stderr,
"Erase successful, but not automatically formatting.\n");
fprintf(stderr, "Unable to get partition size\n.");
return 0;
}
fprintf(stderr,"FAILED (%s)\n", fb_get_error());
return status;
}
image.partition_size = strtoll(response, (char **)NULL, 16);
generator->generate(&image);
if (!image.buffer) {
fprintf(stderr,"Cannot generate image.\n");
return -1;
}
// Following piece of code is similar to fb_queue_flash() but executes
// actions directly without queuing
fprintf(stderr, "sending '%s' (%lli KB)...\n", partition, image.image_size/1024);
status = fb_download_data(usb, image.buffer, image.image_size);
if (status) goto cleanup;
fprintf(stderr, "writing '%s'...\n", partition);
snprintf(cmd, sizeof(cmd), "flash:%s", partition);
status = fb_command(usb, cmd);
if (status) goto cleanup;
cleanup:
generator->cleanup(&image);
return status;
}
void fb_queue_format(const char *partition, int skip_if_not_supported)
{
Action *a;
a = queue_action(OP_FORMAT, partition);
a->data = (void*)skip_if_not_supported;
a->msg = mkmsg("formatting '%s' partition", partition);
}
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(char *str, const char **value, unsigned count)
{
const char *val;
unsigned n;
int len;
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, char *resp, int invert)
{
const char **value = 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, char *resp)
{
return cb_check(a, status, resp, 0);
}
static int cb_reject(Action *a, int status, char *resp)
{
return cb_check(a, status, resp, 1);
}
void fb_queue_require(const char *prod, const char *var,
int invert, unsigned 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 == 0) die("out of memory");
}
static int cb_display(Action *a, int status, 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 == 0) die("out of memory");
a->func = cb_display;
}
static int cb_save(Action *a, int status, char *resp)
{
if (status) {
fprintf(stderr, "%s FAILED (%s)\n", a->cmd, resp);
return status;
}
strncpy(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 *a, int status, char *resp)
{
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;
}
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_FORMAT) {
status = fb_format(a, usb, (int)a->data);
status = a->func(a, status, status ? fb_get_error() : "");
if (status) break;
} else if (a->op == OP_DOWNLOAD_SPARSE) {
status = fb_download_data_sparse(usb, a->data);
status = a->func(a, status, status ? fb_get_error() : "");
if (status) break;
} else {
die("bogus action");
}
}
fprintf(stderr,"finished. total time: %.3fs\n", (now() - start));
return status;
}
int fb_queue_is_empty(void)
{
return (action_list == NULL);
}
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