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cleanup, stub out tests

Browse Source 
not sure how best to write tests, probably a larger test framework on
a board farm to test on real devices will be more sensible.
merge-requests/7/head
Caleb Connolly 3 years ago
parent 55612452e0
commit 4c49647382
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  1. 120
      .clang-format
  2. 674
      LICENSE
  3. 14
      README.md
  4. 103
      bootctrl.h
  5. 717
      bootctrl_impl.cpp
  6. 96
      bootctrl_test.cpp
  7. 1770
      gpt-utils.cpp
  8. 125
      gpt-utils.h
  9. 2
      meson.build
  10. 904
      qbootctl.cpp
  11. 211
      ufs-bsg.cpp
  12. 61
      ufs-bsg.h

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LICENSE
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License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

14
README.md
Unescape View File

@ -5,10 +5,22 @@ This HAL was pulled from AOSP source code and bastardised to build and run on a
## Dependencies ## Dependencies
* zlib-dev * zlib-dev
* meson
* cmake
* linux-headers
## Usage ## Building
qbootctl uses the meson build system
```sh
meson build
meson compile -C build
``` ```
## Usage
```text
qbootctl: qcom bootctrl HAL port for Linux qbootctl: qcom bootctrl HAL port for Linux
------------------------------------------- -------------------------------------------
qbootctl [-c|-m|-s|-u|-b|-n|-x] [SLOT] qbootctl [-c|-m|-s|-u|-b|-n|-x] [SLOT]

103
bootctrl.h
Unescape View File

@ -0,0 +1,103 @@
/*
* Copyright (C) 2016 The Android Open Source Project
* Copyright (C) 2022 Caleb Connolly <caleb@connolly.tech>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __BOOTCTRL_H__
#define __BOOTCTRL_H__
struct slot_info {
bool active;
bool bootable;
bool successful;
};
struct boot_control_module {
/*
* (*getCurrentSlot)() returns the value letting the system know
* whether the current slot is A or B. The meaning of A and B is
* left up to the implementer. It is assumed that if the current slot
* is A, then the block devices underlying B can be accessed directly
* without any risk of corruption.
* The returned value is always guaranteed to be strictly less than the
* value returned by getNumberSlots. Slots start at 0 and
* finish at getNumberSlots() - 1
*/
unsigned (*getCurrentSlot)();
/*
* (*markBootSuccessful)() marks the specified slot
* as boot successful
*
* Returns 0 on success, -errno on error.
*/
int (*markBootSuccessful)(unsigned slot);
/*
* (*setActiveBootSlot)() marks the slot passed in parameter as
* the active boot slot (see getCurrentSlot for an explanation
* of the "slot" parameter). This overrides any previous call to
* setSlotAsUnbootable.
* Returns 0 on success, -errno on error.
*/
int (*setActiveBootSlot)(unsigned slot);
/*
* (*setSlotAsUnbootable)() marks the slot passed in parameter as
* an unbootable. This can be used while updating the contents of the slot's
* partitions, so that the system will not attempt to boot a known bad set up.
* Returns 0 on success, -errno on error.
*/
int (*setSlotAsUnbootable)(unsigned slot);
/*
* (*isSlotBootable)() returns if the slot passed in parameter is
* bootable. Note that slots can be made unbootable by both the
* bootloader and by the OS using setSlotAsUnbootable.
* Returns 1 if the slot is bootable, 0 if it's not, and -errno on
* error.
*/
int (*isSlotBootable)(unsigned slot);
/*
* (*getSuffix)() returns the string suffix used by partitions that
* correspond to the slot number passed in parameter. The returned string
* is expected to be statically allocated and not need to be freed.
* Returns NULL if slot does not match an existing slot.
*/
const char* (*getSuffix)(unsigned slot);
/*
* (*isSlotMarkedSucessful)() returns if the slot passed in parameter has
* been marked as successful using markBootSuccessful.
* Returns 1 if the slot has been marked as successful, 0 if it's
* not the case, and -errno on error.
*/
int (*isSlotMarkedSuccessful)(unsigned slot);
/**
* Returns the active slot to boot into on the next boot. If
* setActiveBootSlot() has been called, the getter function should return
* the same slot as the one provided in the last setActiveBootSlot() call.
*/
unsigned (*getActiveBootSlot)();
};
extern const struct boot_control_module bootctl;
extern const struct boot_control_module bootctl_test;
#endif // __BOOTCTRL_H__

717
bootctrl_impl.cpp
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@ -0,0 +1,717 @@
/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
* Copyright (C) 2021-2022 Caleb Connolly <caleb@connolly.tech>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <map>
#include <list>
#include <string>
#include <vector>
#include <errno.h>
#include <regex>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include "utils.h"
#include "gpt-utils.h"
#include "bootctrl.h"
#define BOOTDEV_DIR "/dev/disk/by-partlabel"
#define BOOT_IMG_PTN_NAME "boot_"
#define LUN_NAME_END_LOC 14
#define BOOT_SLOT_PROP "slot_suffix"
#define MAX_CMDLINE_SIZE 4096
#define SLOT_ACTIVE 1
#define SLOT_INACTIVE 2
#define UPDATE_SLOT(pentry, guid, slot_state) \
({ \
memcpy(pentry, guid, TYPE_GUID_SIZE); \
if (slot_state == SLOT_ACTIVE) \
*(pentry + AB_FLAG_OFFSET) = AB_SLOT_ACTIVE_VAL; \
else if (slot_state == SLOT_INACTIVE) \
*(pentry + AB_FLAG_OFFSET) = \
(*(pentry + AB_FLAG_OFFSET) & \
~AB_PARTITION_ATTR_SLOT_ACTIVE); \
})
using namespace std;
const char *slot_suffix_arr[] = { AB_SLOT_A_SUFFIX, AB_SLOT_B_SUFFIX, NULL };
enum part_attr_type {
ATTR_SLOT_ACTIVE = 0,
ATTR_BOOT_SUCCESSFUL,
ATTR_UNBOOTABLE,
ATTR_BOOTABLE,
};
void get_kernel_cmdline_arg(const char *arg, char *buf, const char *def)
{
int fd;
char pcmd[MAX_CMDLINE_SIZE];
char *val, *found, *ptr = buf;
fd = open("/proc/cmdline", O_RDONLY);
int rc = read(fd, pcmd, MAX_CMDLINE_SIZE);
if (rc < 0) {
fprintf(stderr, "Couldn't open /proc/cmdline: %d (%s)\n", rc,
strerror(errno));
goto error;
}
close(fd);
found = strstr(pcmd, arg);
if (!found || !(val = strstr(found, "="))) {
fprintf(stderr, "Couldn't find cmdline arg: '%s'\n", arg);
goto error;
}
val++;
// no this doesn't handle quotes lol
while (*val != ' ') {
*ptr++ = *val++;
}
return;
error:
strcpy(buf, def);
}
//Get the value of one of the attribute fields for a partition.
static int get_partition_attribute(char *partname,
enum part_attr_type part_attr)
{
struct gpt_disk *disk = NULL;
uint8_t *pentry = NULL;
int retval = -1;
uint8_t *attr = NULL;
if (!partname)
goto error;
disk = gpt_disk_alloc();
if (!disk) {
fprintf(stderr, "%s: Failed to alloc disk struct\n", __func__);
goto error;
}
if (gpt_disk_get_disk_info(partname, disk)) {
fprintf(stderr, "%s: Failed to get disk info\n", __func__);
goto error;
}
pentry = gpt_disk_get_pentry(disk, partname, PRIMARY_GPT);
if (!pentry) {
fprintf(stderr, "%s: pentry does not exist in disk struct\n",
__func__);
goto error;
}
attr = pentry + AB_FLAG_OFFSET;
LOGD("get_partition_attribute() partname = %s, attr = 0x%x\n", partname,
*attr);
if (part_attr == ATTR_SLOT_ACTIVE) {
retval = !!(*attr & AB_PARTITION_ATTR_SLOT_ACTIVE);
LOGD("ATTR_SLOT_ACTIVE, retval = %d\n", retval);
} else if (part_attr == ATTR_BOOT_SUCCESSFUL) {
retval = !!(*attr & AB_PARTITION_ATTR_BOOT_SUCCESSFUL);
LOGD("AB_PARTITION_ATTR_BOOT_SUCCESSFUL, retval = %d\n",
retval);
} else if (part_attr == ATTR_UNBOOTABLE) {
retval = !!(*attr & AB_PARTITION_ATTR_UNBOOTABLE);
LOGD("AB_PARTITION_ATTR_UNBOOTABLE, retval = %d\n", retval);
} else {
retval = -1;
}
gpt_disk_free(disk);
return retval;
error:
if (disk)
gpt_disk_free(disk);
return retval;
}
//Set a particular attribute for all the partitions in a
//slot
static int update_slot_attribute(const char *slot, enum part_attr_type ab_attr)
{
unsigned int i = 0;
char buf[PATH_MAX];
struct stat st;
struct gpt_disk *disk = NULL;
uint8_t *pentry = NULL;
uint8_t *pentry_bak = NULL;
int rc = -1;
uint8_t *attr = NULL;
uint8_t *attr_bak = NULL;
char partName[MAX_GPT_NAME_SIZE + 1] = { 0 };
const char ptn_list[][MAX_GPT_NAME_SIZE - 1] = { AB_PTN_LIST };
int slot_name_valid = 0;
if (!slot) {
fprintf(stderr, "%s: Invalid argument\n", __func__);
goto error;
}
for (i = 0; slot_suffix_arr[i] != NULL; i++) {
if (!strncmp(slot, slot_suffix_arr[i],
strlen(slot_suffix_arr[i])))
slot_name_valid = 1;
}
if (!slot_name_valid) {
fprintf(stderr, "%s: Invalid slot name\n", __func__);
goto error;
}
for (i = 0; i < ARRAY_SIZE(ptn_list); i++) {
memset(buf, '\0', sizeof(buf));
//Check if A/B versions of this ptn exist
snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
ptn_list[i], AB_SLOT_A_SUFFIX);
if (stat(buf, &st) < 0) {
//partition does not have _a version
continue;
}
memset(buf, '\0', sizeof(buf));
snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
ptn_list[i], AB_SLOT_B_SUFFIX);
if (stat(buf, &st) < 0) {
//partition does not have _b version
continue;
}
memset(partName, '\0', sizeof(partName));
snprintf(partName, sizeof(partName) - 1, "%s%s", ptn_list[i],
slot);
disk = gpt_disk_alloc();
if (!disk) {
fprintf(stderr, "%s: Failed to alloc disk struct\n",
__func__);
goto error;
}
rc = gpt_disk_get_disk_info(partName, disk);
if (rc != 0) {
fprintf(stderr, "%s: Failed to get disk info for %s\n",
__func__, partName);
goto error;
}
pentry = gpt_disk_get_pentry(disk, partName, PRIMARY_GPT);
pentry_bak = gpt_disk_get_pentry(disk, partName, SECONDARY_GPT);
if (!pentry || !pentry_bak) {
fprintf(stderr,
"%s: Failed to get pentry/pentry_bak for %s\n",
__func__, partName);
goto error;
}
attr = pentry + AB_FLAG_OFFSET;
LOGD("%s: got pentry for part '%s': 0x%lx (at flags: 0x%x)\n",
__func__, partName, *(uint64_t *)pentry, *attr);
attr_bak = pentry_bak + AB_FLAG_OFFSET;
switch (ab_attr) {
case ATTR_BOOT_SUCCESSFUL:
*attr = (*attr) | AB_PARTITION_ATTR_BOOT_SUCCESSFUL;
*attr_bak =
(*attr_bak) | AB_PARTITION_ATTR_BOOT_SUCCESSFUL;
break;
case ATTR_UNBOOTABLE:
*attr = (*attr) | AB_PARTITION_ATTR_UNBOOTABLE;
*attr_bak = (*attr_bak) | AB_PARTITION_ATTR_UNBOOTABLE;
break;
case ATTR_BOOTABLE:
*attr = (*attr) ^ AB_PARTITION_ATTR_UNBOOTABLE;
*attr_bak = (*attr_bak) ^ AB_PARTITION_ATTR_UNBOOTABLE;
break;
case ATTR_SLOT_ACTIVE:
*attr = (*attr) | AB_PARTITION_ATTR_SLOT_ACTIVE;
*attr_bak = (*attr) | AB_PARTITION_ATTR_SLOT_ACTIVE;
break;
default:
fprintf(stderr, "%s: Unrecognized attr\n", __func__);
goto error;
}
if (gpt_disk_update_crc(disk)) {
fprintf(stderr, "%s: Failed to update crc for %s\n",
__func__, partName);
goto error;
}
if (gpt_disk_commit(disk)) {
fprintf(stderr,
"%s: Failed to write back entry for %s\n",
__func__, partName);
goto error;
}
gpt_disk_free(disk);
disk = NULL;
}
return 0;
error:
if (disk)
gpt_disk_free(disk);
return -1;
}
unsigned get_number_slots()
{
struct dirent *de = NULL;
DIR *dir_bootdev = NULL;
unsigned slot_count = 0;
dir_bootdev = opendir(BOOTDEV_DIR);
if (!dir_bootdev) {
fprintf(stderr, "%s: Failed to open bootdev dir (%s)\n",
__func__, strerror(errno));
goto error;
}
while ((de = readdir(dir_bootdev))) {
if (de->d_name[0] == '.')
continue;
static_assert(AB_SLOT_A_SUFFIX[0] == '_',
"Breaking change to slot A suffix");
static_assert(AB_SLOT_B_SUFFIX[0] == '_',
"Breaking change to slot B suffix");
if (!strncmp(de->d_name, BOOT_IMG_PTN_NAME,
strlen(BOOT_IMG_PTN_NAME)) &&
!!strncmp(de->d_name, "boot_aging\n",
strlen("boot_aging"))) {
slot_count++;
}
}
closedir(dir_bootdev);
return slot_count;
error:
if (dir_bootdev)
closedir(dir_bootdev);
return 0;
}
static unsigned int get_current_slot()
{
uint32_t num_slots = 0;
char bootSlotProp[MAX_CMDLINE_SIZE] = { '\0' };
unsigned i = 0;
num_slots = get_number_slots();
if (num_slots <= 1) {
//Slot 0 is the only slot around.
return 0;
}
get_kernel_cmdline_arg(BOOT_SLOT_PROP, bootSlotProp, "_a");
if (!strncmp(bootSlotProp, "N/A\n", strlen("N/A"))) {
fprintf(stderr, "%s: Unable to read boot slot property\n",
__func__);
goto error;
}
//Iterate through a list of partitons named as boot+suffix
//and see which one is currently active.
for (i = 0; slot_suffix_arr[i] != NULL; i++) {
if (!strncmp(bootSlotProp, slot_suffix_arr[i],
strlen(slot_suffix_arr[i]))) {
//printf("%s current_slot = %d\n", __func__, i);
return i;
}
}
error:
//The HAL spec requires that we return a number between
//0 to num_slots - 1. Since something went wrong here we
//are just going to return the default slot.
return 0;
}
static int boot_control_check_slot_sanity(unsigned slot)
{
uint32_t num_slots = get_number_slots();
if ((num_slots < 1) || (slot > num_slots - 1)) {
fprintf(stderr, "Invalid slot number");
return -1;
}
return 0;
}
int get_boot_attr(unsigned slot, enum part_attr_type attr)
{
char bootPartition[MAX_GPT_NAME_SIZE + 1] = { 0 };
if (boot_control_check_slot_sanity(slot) != 0) {
fprintf(stderr, "%s: Argument check failed\n", __func__);
return -1;
}
snprintf(bootPartition, sizeof(bootPartition) - 1, "boot%s",
slot_suffix_arr[slot]);
return get_partition_attribute(bootPartition, attr);
}
int is_slot_bootable(unsigned slot)
{
int attr = 0;
attr = get_boot_attr(slot, ATTR_UNBOOTABLE);
if (attr >= 0)
return !attr;
return -1;
}
int mark_boot_successful(unsigned slot)
{
int successful = get_boot_attr(slot, ATTR_BOOT_SUCCESSFUL);
if (!is_slot_bootable(slot)) {
printf("SLOT %s: was marked unbootable, fixing this"
" (I hope you know what you're doing...)\n",
slot_suffix_arr[slot]);
update_slot_attribute(slot_suffix_arr[slot], ATTR_BOOTABLE);
}
if (successful) {
fprintf(stderr, "SLOT %s: already marked successful\n",
slot_suffix_arr[slot]);
return -1;
}
if (update_slot_attribute(slot_suffix_arr[slot],
ATTR_BOOT_SUCCESSFUL)) {
goto error;
}
return 0;
error:
fprintf(stderr, "SLOT %s: Failed to mark boot successful\n",
slot_suffix_arr[slot]);
return -1;
}
const char *get_suffix(unsigned slot)
{
if (boot_control_check_slot_sanity(slot) != 0)
return NULL;
else
return slot_suffix_arr[slot];
}
//Return a gpt disk structure representing the disk that holds
//partition.
static struct gpt_disk *boot_ctl_get_disk_info(char *partition)
{
struct gpt_disk *disk = NULL;
if (!partition)
return NULL;
disk = gpt_disk_alloc();
if (!disk) {
fprintf(stderr, "%s: Failed to alloc disk\n", __func__);
goto error;
}
if (gpt_disk_get_disk_info(partition, disk)) {
fprintf(stderr, "failed to get disk info for %s\n", partition);
goto error;
}
return disk;
error:
if (disk)
gpt_disk_free(disk);
return NULL;
}
//The argument here is a vector of partition names(including the slot suffix)
//that lie on a single disk
static int boot_ctl_set_active_slot_for_partitions(vector<string> part_list,
unsigned slot)
{
char buf[PATH_MAX] = { 0 };
struct gpt_disk *disk = NULL;
char slotA[MAX_GPT_NAME_SIZE + 1] = { 0 };
char slotB[MAX_GPT_NAME_SIZE + 1] = { 0 };
char active_guid[TYPE_GUID_SIZE + 1] = { 0 };
char inactive_guid[TYPE_GUID_SIZE + 1] = { 0 };
int rc;
//Pointer to the partition entry of current 'A' partition
uint8_t *pentryA = NULL;
uint8_t *pentryA_bak = NULL;
//Pointer to partition entry of current 'B' partition
uint8_t *pentryB = NULL;
uint8_t *pentryB_bak = NULL;
struct stat st;
vector<string>::iterator partition_iterator;
LOGD("Marking slot %s as active:\n", slot_suffix_arr[slot]);
for (partition_iterator = part_list.begin();
partition_iterator != part_list.end(); partition_iterator++) {
//Chop off the slot suffix from the partition name to
//make the string easier to work with.
string prefix = *partition_iterator;
LOGD("Part: %s\n", prefix.c_str());
if (prefix.size() < (strlen(AB_SLOT_A_SUFFIX) + 1)) {
fprintf(stderr, "Invalid partition name: %s\n",
prefix.c_str());
goto error;
}
prefix.resize(prefix.size() - strlen(AB_SLOT_A_SUFFIX));
//Check if A/B versions of this ptn exist
snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
prefix.c_str(), AB_SLOT_A_SUFFIX);
LOGD("\t_a Path: '%s'\n", buf);
rc = stat(buf, &st);
if (rc < 0) {
fprintf(stderr, "Failed to stat() path: %d: %s\n", rc,
strerror(errno));
continue;
}
memset(buf, '\0', sizeof(buf));
snprintf(buf, sizeof(buf) - 1, "%s/%s%s", BOOT_DEV_DIR,
prefix.c_str(), AB_SLOT_B_SUFFIX);
LOGD("\t_b Path: '%s'\n", buf);
rc = stat(buf, &st);
if (rc < 0) {
fprintf(stderr, "Failed to stat() path: %d: %s\n", rc,
strerror(errno));
continue;
}
memset(slotA, 0, sizeof(slotA));
memset(slotB, 0, sizeof(slotA));
snprintf(slotA, sizeof(slotA) - 1, "%s%s", prefix.c_str(),
AB_SLOT_A_SUFFIX);
snprintf(slotB, sizeof(slotB) - 1, "%s%s", prefix.c_str(),
AB_SLOT_B_SUFFIX);
//Get the disk containing the partitions that were passed in.
//All partitions passed in must lie on the same disk.
if (!disk) {
disk = boot_ctl_get_disk_info(slotA);
if (!disk)
goto error;
}
//Get partition entry for slot A & B from the primary
//and backup tables.
pentryA = gpt_disk_get_pentry(disk, slotA, PRIMARY_GPT);
pentryA_bak = gpt_disk_get_pentry(disk, slotA, SECONDARY_GPT);
pentryB = gpt_disk_get_pentry(disk, slotB, PRIMARY_GPT);
pentryB_bak = gpt_disk_get_pentry(disk, slotB, SECONDARY_GPT);
if (!pentryA || !pentryA_bak || !pentryB || !pentryB_bak) {
//None of these should be NULL since we have already
//checked for A & B versions earlier.
fprintf(stderr, "Slot pentries for %s not found.\n",
prefix.c_str());
goto error;
}
LOGD("\tAB attr (A): 0x%x (backup: 0x%x)\n",
*(uint16_t *)(pentryA + AB_FLAG_OFFSET),
*(uint16_t *)(pentryA_bak + AB_FLAG_OFFSET));
LOGD("\tAB attr (B): 0x%x (backup: 0x%x)\n",
*(uint16_t *)(pentryB + AB_FLAG_OFFSET),
*(uint16_t *)(pentryB_bak + AB_FLAG_OFFSET));
memset(active_guid, '\0', sizeof(active_guid));
memset(inactive_guid, '\0', sizeof(inactive_guid));
if (get_partition_attribute(slotA, ATTR_SLOT_ACTIVE) == 1) {
//A is the current active slot
memcpy((void *)active_guid, (const void *)pentryA,
TYPE_GUID_SIZE);
memcpy((void *)inactive_guid, (const void *)pentryB,
TYPE_GUID_SIZE);
} else if (get_partition_attribute(slotB, ATTR_SLOT_ACTIVE) ==
1) {
//B is the current active slot
memcpy((void *)active_guid, (const void *)pentryB,
TYPE_GUID_SIZE);
memcpy((void *)inactive_guid, (const void *)pentryA,
TYPE_GUID_SIZE);
} else {
fprintf(stderr, "Both A & B are inactive..Aborting");
goto error;
}
// printf("\tActive GUID: %s\n", active_guid);
// printf("\tInactive GUID: %s\n", active_guid);
if (!strncmp(slot_suffix_arr[slot], AB_SLOT_A_SUFFIX,
strlen(AB_SLOT_A_SUFFIX))) {
//Mark A as active in primary table
UPDATE_SLOT(pentryA, active_guid, SLOT_ACTIVE);
//Mark A as active in backup table
UPDATE_SLOT(pentryA_bak, active_guid, SLOT_ACTIVE);
//Mark B as inactive in primary table
UPDATE_SLOT(pentryB, inactive_guid, SLOT_INACTIVE);
//Mark B as inactive in backup table
UPDATE_SLOT(pentryB_bak, inactive_guid, SLOT_INACTIVE);
} else if (!strncmp(slot_suffix_arr[slot], AB_SLOT_B_SUFFIX,
strlen(AB_SLOT_B_SUFFIX))) {
//Mark B as active in primary table
UPDATE_SLOT(pentryB, active_guid, SLOT_ACTIVE);
//Mark B as active in backup table
UPDATE_SLOT(pentryB_bak, active_guid, SLOT_ACTIVE);
//Mark A as inavtive in primary table
UPDATE_SLOT(pentryA, inactive_guid, SLOT_INACTIVE);
//Mark A as inactive in backup table
UPDATE_SLOT(pentryA_bak, inactive_guid, SLOT_INACTIVE);
} else {
//Something has gone terribly terribly wrong
fprintf(stderr, "%s: Unknown slot suffix!\n", __func__);
goto error;
}
if (gpt_disk_update_crc(disk) != 0) {
fprintf(stderr, "%s: Failed to update gpt_disk crc\n",
__func__);
goto error;
}
}
//write updated content to disk
if (disk) {
if (gpt_disk_commit(disk)) {
fprintf(stderr, "Failed to commit disk entry");
goto error;
}
gpt_disk_free(disk);
}
return 0;
error:
if (disk)
gpt_disk_free(disk);
return -1;
}
unsigned get_active_boot_slot()
{
uint32_t num_slots = get_number_slots();
if (num_slots <= 1) {
//Slot 0 is the only slot around.
return 0;
}
for (uint32_t i = 0; i < num_slots; i++) {
if (get_boot_attr(i, ATTR_SLOT_ACTIVE))
return i;
}
fprintf(stderr, "%s: Failed to find the active boot slot\n", __func__);
return 0;
}
int set_active_boot_slot(unsigned slot)
{
map<string, vector<string> > ptn_map;
vector<string> ptn_vec;
const char ptn_list[][MAX_GPT_NAME_SIZE] = { AB_PTN_LIST };
uint32_t i;
int rc = -1;
map<string, vector<string> >::iterator map_iter;
if (boot_control_check_slot_sanity(slot)) {
fprintf(stderr, "%s: Bad arguments\n", __func__);
goto error;
}
//The partition list just contains prefixes(without the _a/_b) of the
//partitions that support A/B. In order to get the layout we need the
//actual names. To do this we append the slot suffix to every member
//in the list.
for (i = 0; i < ARRAY_SIZE(ptn_list); i++) {
//XBL is handled differrently for ufs devices so ignore it
if (!strncmp(ptn_list[i], PTN_XBL, strlen(PTN_XBL)))
continue;
//The partition list will be the list of _a partitions
string cur_ptn = ptn_list[i];
cur_ptn.append(AB_SLOT_A_SUFFIX);
ptn_vec.push_back(cur_ptn);
}
//The partition map gives us info in the following format:
// [path_to_block_device_1]--><partitions on device 1>
// [path_to_block_device_2]--><partitions on device 2>
// ...
// ...
// eg:
// [/dev/block/sdb]---><system, boot, rpm, tz,....>
if (gpt_utils_get_partition_map(ptn_vec, ptn_map)) {
fprintf(stderr, "%s: Failed to get partition map\n", __func__);
goto error;
}
for (map_iter = ptn_map.begin(); map_iter != ptn_map.end();
map_iter++) {
if (map_iter->second.size() < 1)
continue;
if (boot_ctl_set_active_slot_for_partitions(map_iter->second,
slot)) {
fprintf(stderr,
"%s: Failed to set active slot for partitions \n",
__func__);
;
goto error;
}
}
if (!strncmp(slot_suffix_arr[slot], AB_SLOT_A_SUFFIX,
strlen(AB_SLOT_A_SUFFIX))) {
//Set xbl_a as the boot lun
rc = gpt_utils_set_xbl_boot_partition(NORMAL_BOOT);
} else if (!strncmp(slot_suffix_arr[slot], AB_SLOT_B_SUFFIX,
strlen(AB_SLOT_B_SUFFIX))) {
//Set xbl_b as the boot lun
rc = gpt_utils_set_xbl_boot_partition(BACKUP_BOOT);
} else {
//Something has gone terribly terribly wrong
fprintf(stderr, "%s: Unknown slot suffix!\n", __func__);
goto error;
}
if (rc) {
fprintf(stderr,
"%s: Failed to switch xbl boot partition\n",
__func__);
goto error;
}
return 0;
error:
return -1;
}
int set_slot_as_unbootable(unsigned slot)
{
if (boot_control_check_slot_sanity(slot) != 0) {
fprintf(stderr, "%s: Argument check failed\n", __func__);
goto error;
}
if (update_slot_attribute(slot_suffix_arr[slot], ATTR_UNBOOTABLE)) {
goto error;
}
return 0;
error:
fprintf(stderr, "%s: Failed to mark slot unbootable\n", __func__);
return -1;
}
int is_slot_marked_successful(unsigned slot)
{
int attr = 0;
char bootPartition[MAX_GPT_NAME_SIZE + 1] = { 0 };
if (boot_control_check_slot_sanity(slot) != 0) {
fprintf(stderr, "%s: Argument check failed\n", __func__);
goto error;
}
snprintf(bootPartition, sizeof(bootPartition) - 1, "boot%s",
slot_suffix_arr[slot]);
attr = get_partition_attribute(bootPartition, ATTR_BOOT_SUCCESSFUL);
LOGD("%s: slot = %d, attr = 0x%x\n", __func__, slot, attr);
if (attr >= 0)
return attr;
error:
return -1;
}
const struct boot_control_module bootctl = {
.getCurrentSlot = get_current_slot,
.markBootSuccessful = mark_boot_successful,
.setActiveBootSlot = set_active_boot_slot,
.setSlotAsUnbootable = set_slot_as_unbootable,
.isSlotBootable = is_slot_bootable,
.getSuffix = get_suffix,
.isSlotMarkedSuccessful = is_slot_marked_successful,
.getActiveBootSlot = get_active_boot_slot,
};

96
bootctrl_test.cpp
Unescape View File

@ -0,0 +1,96 @@
/*
* Copyright (C) 2016 The Android Open Source Project
* Copyright (C) 2022 Caleb Connolly <caleb@connolly.tech>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "bootctrl.h"
struct test_state {
struct slot_info slots[2];
};
static struct test_state state = {
.slots = {
[0] = {
.active = true,
.bootable = true,
.successful = false,
},
[1] = {
.active = false,
.bootable = true,
.successful = false,
},
}
};
unsigned test_get_current_slot()
{
return (unsigned int)state.slots[1].active;
}
int test_mark_boot_successful(unsigned slot)
{
return 0;
}
int test_set_active_boot_slot(unsigned slot)
{
return 0;
}
int test_set_slot_as_unbootable(unsigned slot)
{
return 0;
}
int test_is_slot_bootable(unsigned slot)
{
return 1;
}
const char *test_get_suffix(unsigned slot)
{
switch (slot) {
case 0:
return "_x";
case 1:
return "_z";
default:
return "??";
}
}
int test_is_slot_marked_successful(unsigned slot)
{
return 1;
}
unsigned test_get_active_boot_slot()
{
return 0;
}
const struct boot_control_module bootctl_test = {
.getCurrentSlot = test_get_current_slot,
.markBootSuccessful = test_mark_boot_successful,
.setActiveBootSlot = test_set_active_boot_slot,
.setSlotAsUnbootable = test_set_slot_as_unbootable,
.isSlotBootable = test_is_slot_bootable,
.getSuffix = test_get_suffix,
.isSlotMarkedSuccessful = test_is_slot_marked_successful,
.getActiveBootSlot = test_get_active_boot_slot,
};

1770
gpt-utils.cpp
View File

File diff suppressed because it is too large Load Diff

125
gpt-utils.h
Unescape View File

@ -37,78 +37,58 @@ extern "C" {
#endif #endif
#include <unistd.h> #include <unistd.h>
#include <stdlib.h> #include <stdlib.h>
/******************************************************************************
* GPT HEADER DEFINES
******************************************************************************/
#define GPT_SIGNATURE "EFI PART"
#define HEADER_SIZE_OFFSET 12
#define HEADER_CRC_OFFSET 16
#define PRIMARY_HEADER_OFFSET 24
#define BACKUP_HEADER_OFFSET 32
#define FIRST_USABLE_LBA_OFFSET 40
#define LAST_USABLE_LBA_OFFSET 48
#define PENTRIES_OFFSET 72
#define PARTITION_COUNT_OFFSET 80
#define PENTRY_SIZE_OFFSET 84
#define PARTITION_CRC_OFFSET 88
#define TYPE_GUID_OFFSET 0 #define GPT_SIGNATURE "EFI PART"
#define TYPE_GUID_SIZE 16 #define HEADER_SIZE_OFFSET 12
#define PTN_ENTRY_SIZE 128 #define HEADER_CRC_OFFSET 16
#define UNIQUE_GUID_OFFSET 16 #define PRIMARY_HEADER_OFFSET 24
#define FIRST_LBA_OFFSET 32 #define BACKUP_HEADER_OFFSET 32
#define LAST_LBA_OFFSET 40 #define FIRST_USABLE_LBA_OFFSET 40
#define ATTRIBUTE_FLAG_OFFSET 48 #define LAST_USABLE_LBA_OFFSET 48
#define PARTITION_NAME_OFFSET 56 #define PENTRIES_OFFSET 72
#define MAX_GPT_NAME_SIZE 72 #define PARTITION_COUNT_OFFSET 80
#define PENTRY_SIZE_OFFSET 84
#define PARTITION_CRC_OFFSET 88
#define TYPE_GUID_OFFSET 0
#define TYPE_GUID_SIZE 16
#define PTN_ENTRY_SIZE 128
#define UNIQUE_GUID_OFFSET 16
#define FIRST_LBA_OFFSET 32
#define LAST_LBA_OFFSET 40
#define ATTRIBUTE_FLAG_OFFSET 48
#define PARTITION_NAME_OFFSET 56
#define MAX_GPT_NAME_SIZE 72
/******************************************************************************
* AB RELATED DEFINES
******************************************************************************/
//Bit 48 onwords in the attribute field are the ones where we are allowed to //Bit 48 onwords in the attribute field are the ones where we are allowed to
//store our AB attributes. //store our AB attributes.
#define AB_FLAG_OFFSET (ATTRIBUTE_FLAG_OFFSET + 6) #define AB_FLAG_OFFSET (ATTRIBUTE_FLAG_OFFSET + 6)
#define GPT_DISK_INIT_MAGIC 0xABCD #define GPT_DISK_INIT_MAGIC 0xABCD
#define AB_PARTITION_ATTR_SLOT_ACTIVE (0x1<<2) #define AB_PARTITION_ATTR_SLOT_ACTIVE (0x1 << 2)
#define AB_PARTITION_ATTR_BOOT_SUCCESSFUL (0x1<<6) #define AB_PARTITION_ATTR_BOOT_SUCCESSFUL (0x1 << 6)
#define AB_PARTITION_ATTR_UNBOOTABLE (0x1<<7) #define AB_PARTITION_ATTR_UNBOOTABLE (0x1 << 7)
#define AB_SLOT_ACTIVE_VAL 0xF #define AB_SLOT_ACTIVE_VAL 0xF
#define AB_SLOT_INACTIVE_VAL 0x0 #define AB_SLOT_INACTIVE_VAL 0x0
#define AB_SLOT_ACTIVE 1 #define AB_SLOT_ACTIVE 1
#define AB_SLOT_INACTIVE 0 #define AB_SLOT_INACTIVE 0
#define AB_SLOT_A_SUFFIX "_a" #define AB_SLOT_A_SUFFIX "_a"
#define AB_SLOT_B_SUFFIX "_b" #define AB_SLOT_B_SUFFIX "_b"
#define PTN_XBL "xbl" #define PTN_XBL "xbl"
#define PTN_SWAP_LIST PTN_XBL, \ #define PTN_SWAP_LIST \
"abl", "aop", "apdp", "cmnlib", "cmnlib64", \ PTN_XBL, "abl", "aop", "apdp", "cmnlib", "cmnlib64", "devcfg", "dtbo", \
"devcfg", "dtbo", "hyp", "keymaster", "msadp", \ "hyp", "keymaster", "msadp", "qupfw", "storsec", "tz", \
"qupfw", "storsec", "tz", "vbmeta", "vbmeta_system", "xbl_config" "vbmeta", "vbmeta_system", "xbl_config"
#define AB_PTN_LIST PTN_SWAP_LIST, "boot", "system", "vendor", "modem", "system_ext", "product" #define AB_PTN_LIST \
#define BOOT_DEV_DIR "/dev/disk/by-partlabel" PTN_SWAP_LIST, "boot", "system", "vendor", "modem", "system_ext", \
"product"
#define BOOT_DEV_DIR "/dev/disk/by-partlabel"
/******************************************************************************
* HELPER MACROS
******************************************************************************/
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
/******************************************************************************
* TYPES
******************************************************************************/
enum boot_update_stage {
UPDATE_MAIN = 1,
UPDATE_BACKUP,
UPDATE_FINALIZE
};
enum gpt_instance { enum gpt_instance { PRIMARY_GPT = 0, SECONDARY_GPT };
PRIMARY_GPT = 0,
SECONDARY_GPT
};
enum boot_chain { enum boot_chain { NORMAL_BOOT = 0, BACKUP_BOOT };
NORMAL_BOOT = 0,
BACKUP_BOOT
};
struct gpt_disk { struct gpt_disk {
//GPT primary header //GPT primary header
@ -138,12 +118,8 @@ struct gpt_disk {
uint32_t is_initialized; uint32_t is_initialized;
}; };
/******************************************************************************
* FUNCTION PROTOTYPES
******************************************************************************/
int prepare_boot_update(enum boot_update_stage stage);
//GPT disk methods //GPT disk methods
struct gpt_disk* gpt_disk_alloc(); struct gpt_disk *gpt_disk_alloc();
//Free previously allocated gpt_disk struct //Free previously allocated gpt_disk struct
void gpt_disk_free(struct gpt_disk *disk); void gpt_disk_free(struct gpt_disk *disk);
//Get the details of the disk holding the partition whose name //Get the details of the disk holding the partition whose name
@ -151,9 +127,8 @@ void gpt_disk_free(struct gpt_disk *disk);
int gpt_disk_get_disk_info(const char *dev, struct gpt_disk *disk); int gpt_disk_get_disk_info(const char *dev, struct gpt_disk *disk);
//Get pointer to partition entry from a allocated gpt_disk structure //Get pointer to partition entry from a allocated gpt_disk structure
uint8_t* gpt_disk_get_pentry(struct gpt_disk *disk, uint8_t *gpt_disk_get_pentry(struct gpt_disk *disk, const char *partname,
const char *partname, enum gpt_instance instance);
enum gpt_instance instance);
//Update the crc fields of the modified disk structure //Update the crc fields of the modified disk structure
int gpt_disk_update_crc(struct gpt_disk *disk); int gpt_disk_update_crc(struct gpt_disk *disk);
@ -161,9 +136,6 @@ int gpt_disk_update_crc(struct gpt_disk *disk);
//Write the contents of struct gpt_disk back to the actual disk //Write the contents of struct gpt_disk back to the actual disk
int gpt_disk_commit(struct gpt_disk *disk); int gpt_disk_commit(struct gpt_disk *disk);
//Return if the current device is UFS based or not
int gpt_utils_is_ufs_device();
//Swtich betwieen using either the primary or the backup //Swtich betwieen using either the primary or the backup
//boot LUN for boot. This is required since UFS boot partitions //boot LUN for boot. This is required since UFS boot partitions
//cannot have a backup GPT which is what we use for failsafe //cannot have a backup GPT which is what we use for failsafe
@ -188,8 +160,9 @@ int gpt_utils_set_xbl_boot_partition(enum boot_chain chain);
//sits on. The key in the map is the path to the block device where the //sits on. The key in the map is the path to the block device where the
//partition lies and the value is a vector of strings indicating which of //partition lies and the value is a vector of strings indicating which of
//the passed in partition names sits on that device. //the passed in partition names sits on that device.
int gpt_utils_get_partition_map(std::vector<std::string>& partition_list, int gpt_utils_get_partition_map(
std::map<std::string,std::vector<std::string>>& partition_map); std::vector<std::string> &partition_list,
std::map<std::string, std::vector<std::string> > &partition_map);
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

2
meson.build
Unescape View File

@ -6,6 +6,8 @@ deps = [
src = [ src = [
'qbootctl.cpp', 'qbootctl.cpp',
'bootctrl_impl.cpp',
'bootctrl_test.cpp',
'gpt-utils.cpp', 'gpt-utils.cpp',
'ufs-bsg.cpp', 'ufs-bsg.cpp',
] ]

904
qbootctl.cpp
View File

File diff suppressed because it is too large Load Diff

211
ufs-bsg.cpp
Unescape View File

@ -76,131 +76,138 @@
int ufs_bsg_dev_open(void) int ufs_bsg_dev_open(void)
{ {
int ret; int ret;
if (!fd_ufs_bsg) { if (!fd_ufs_bsg) {
fd_ufs_bsg = open(ufs_bsg_dev, O_RDWR); fd_ufs_bsg = open(ufs_bsg_dev, O_RDWR);
ret = errno; ret = errno;
if (fd_ufs_bsg < 0) { if (fd_ufs_bsg < 0) {
fprintf(stderr, "Unable to open %s (error no: %d)", fprintf(stderr, "Unable to open %s (error no: %d)",
ufs_bsg_dev, errno); ufs_bsg_dev, errno);
fd_ufs_bsg = 0; fd_ufs_bsg = 0;
return ret; return ret;
} }
} }
return 0; return 0;
} }
void ufs_bsg_dev_close(void) void ufs_bsg_dev_close(void)
{ {
if (fd_ufs_bsg) { if (fd_ufs_bsg) {
close(fd_ufs_bsg); close(fd_ufs_bsg);
fd_ufs_bsg = 0; fd_ufs_bsg = 0;
} }
} }
static int ufs_bsg_ioctl(int fd, struct ufs_bsg_request *req, static int ufs_bsg_ioctl(int fd, struct ufs_bsg_request *req,
struct ufs_bsg_reply *rsp, __u8 *buf, __u32 buf_len, struct ufs_bsg_reply *rsp, __u8 *buf, __u32 buf_len,
enum bsg_ioctl_dir dir) enum bsg_ioctl_dir dir)
{ {
int ret; int ret;
struct sg_io_v4 sg_io{}; struct sg_io_v4 sg_io {
};
sg_io.guard = 'Q';
sg_io.protocol = BSG_PROTOCOL_SCSI; sg_io.guard = 'Q';
sg_io.subprotocol = BSG_SUB_PROTOCOL_SCSI_TRANSPORT; sg_io.protocol = BSG_PROTOCOL_SCSI;
sg_io.request_len = sizeof(*req); sg_io.subprotocol = BSG_SUB_PROTOCOL_SCSI_TRANSPORT;
sg_io.request = (__u64)req; sg_io.request_len = sizeof(*req);
sg_io.response = (__u64)rsp; sg_io.request = (__u64)req;
sg_io.max_response_len = sizeof(*rsp); sg_io.response = (__u64)rsp;
if (dir == BSG_IOCTL_DIR_FROM_DEV) { sg_io.max_response_len = sizeof(*rsp);
sg_io.din_xfer_len = buf_len; if (dir == BSG_IOCTL_DIR_FROM_DEV) {
sg_io.din_xferp = (__u64)(buf); sg_io.din_xfer_len = buf_len;
} else { sg_io.din_xferp = (__u64)(buf);
sg_io.dout_xfer_len = buf_len; } else {
sg_io.dout_xferp = (__u64)(buf); sg_io.dout_xfer_len = buf_len;
} sg_io.dout_xferp = (__u64)(buf);
}
ret = ioctl(fd, SG_IO, &sg_io);
if (ret) ret = ioctl(fd, SG_IO, &sg_io);
fprintf(stderr, "%s: Error from sg_io ioctl (return value: %d, error no: %d, reply result from LLD: %d\n)", if (ret)
__func__, ret, errno, rsp->result); fprintf(stderr,
"%s: Error from sg_io ioctl (return value: %d, error no: %d, reply result from LLD: %d\n)",
if (sg_io.info || rsp->result) { __func__, ret, errno, rsp->result);
fprintf(stderr, "%s: Error from sg_io info (check sg info: device_status: 0x%x, transport_status: 0x%x, driver_status: 0x%x, reply result from LLD: %d\n)",
__func__, sg_io.device_status, sg_io.transport_status, if (sg_io.info || rsp->result) {
sg_io.driver_status, rsp->result); fprintf(stderr,
ret = -EAGAIN; "%s: Error from sg_io info (check sg info: device_status: 0x%x, transport_status: 0x%x, driver_status: 0x%x, reply result from LLD: %d\n)",
} __func__, sg_io.device_status, sg_io.transport_status,
sg_io.driver_status, rsp->result);
return ret; ret = -EAGAIN;
}
return ret;
} }
static void compose_ufs_bsg_query_req(struct ufs_bsg_request *req, __u8 func, static void compose_ufs_bsg_query_req(struct ufs_bsg_request *req, __u8 func,
__u8 opcode, __u8 idn, __u8 index, __u8 sel, __u8 opcode, __u8 idn, __u8 index,
__u16 length) __u8 sel, __u16 length)
{ {
struct utp_upiu_header *hdr = &req->upiu_req.header; struct utp_upiu_header *hdr = &req->upiu_req.header;
struct utp_upiu_query *qr = &req->upiu_req.qr; struct utp_upiu_query *qr = &req->upiu_req.qr;
req->msgcode = UTP_UPIU_QUERY_REQ; req->msgcode = UTP_UPIU_QUERY_REQ;
hdr->dword_0 = DWORD(UTP_UPIU_QUERY_REQ, 0, 0, 0); hdr->dword_0 = DWORD(UTP_UPIU_QUERY_REQ, 0, 0, 0);
hdr->dword_1 = DWORD(0, func, 0, 0); hdr->dword_1 = DWORD(0, func, 0, 0);
hdr->dword_2 = DWORD(0, 0, length >> 8, (__u8)length); hdr->dword_2 = DWORD(0, 0, length >> 8, (__u8)length);
qr->opcode = opcode; qr->opcode = opcode;
qr->idn = idn; qr->idn = idn;
qr->index = index; qr->index = index;
qr->selector = sel; qr->selector = sel;
qr->length = htobe16(length); qr->length = htobe16(length);
} }
static int ufs_query_attr(int fd, __u32 value, __u8 func, __u8 opcode, __u8 idn,
static int ufs_query_attr(int fd, __u32 value, __u8 index, __u8 sel)
__u8 func, __u8 opcode, __u8 idn,
__u8 index, __u8 sel)
{ {
struct ufs_bsg_request req{}; struct ufs_bsg_request req {
struct ufs_bsg_reply rsp{}; };
enum bsg_ioctl_dir dir = BSG_IOCTL_DIR_FROM_DEV; struct ufs_bsg_reply rsp {
int ret = 0; };
enum bsg_ioctl_dir dir = BSG_IOCTL_DIR_FROM_DEV;
int ret = 0;
if (opcode == QUERY_REQ_OP_WRITE_DESC || opcode == QUERY_REQ_OP_WRITE_ATTR) if (opcode == QUERY_REQ_OP_WRITE_DESC ||
dir = BSG_IOCTL_DIR_TO_DEV; opcode == QUERY_REQ_OP_WRITE_ATTR)
dir = BSG_IOCTL_DIR_TO_DEV;
req.upiu_req.qr.value = htobe32(value); req.upiu_req.qr.value = htobe32(value);
compose_ufs_bsg_query_req(&req, func, opcode, idn, index, sel, 0); compose_ufs_bsg_query_req(&req, func, opcode, idn, index, sel, 0);
ret = ufs_bsg_ioctl(fd, &req, &rsp, 0, 0, dir); ret = ufs_bsg_ioctl(fd, &req, &rsp, 0, 0, dir);
if (ret) if (ret)
fprintf(stderr, "%s: Error from ufs_bsg_ioctl (return value: %d, error no: %d\n)", fprintf(stderr,
__func__, ret, errno); "%s: Error from ufs_bsg_ioctl (return value: %d, error no: %d\n)",
__func__, ret, errno);
return ret; return ret;
} }
int32_t set_boot_lun(__u8 lun_id) int32_t set_boot_lun(__u8 lun_id)
{ {
int32_t ret; int32_t ret;
__u32 boot_lun_id = lun_id; __u32 boot_lun_id = lun_id;
// ret = get_ufs_bsg_dev(); // ret = get_ufs_bsg_dev();
// if (ret) // if (ret)
// return ret; // return ret;
LOGD("Using UFS bsg device: %s\n", ufs_bsg_dev); LOGD("Using UFS bsg device: %s\n", ufs_bsg_dev);
ret = ufs_bsg_dev_open(); ret = ufs_bsg_dev_open();
if (ret) if (ret)
return ret; return ret;
LOGD("Opened ufs bsg dev: %s\n", ufs_bsg_dev); LOGD("Opened ufs bsg dev: %s\n", ufs_bsg_dev);
ret = ufs_query_attr(fd_ufs_bsg, boot_lun_id, QUERY_REQ_FUNC_STD_WRITE, ret = ufs_query_attr(fd_ufs_bsg, boot_lun_id, QUERY_REQ_FUNC_STD_WRITE,
QUERY_REQ_OP_WRITE_ATTR, QUERY_ATTR_IDN_BOOT_LU_EN, 0, 0); QUERY_REQ_OP_WRITE_ATTR, QUERY_ATTR_IDN_BOOT_LU_EN,
if (ret) { 0, 0);
fprintf(stderr, "Error requesting ufs attr idn %d via query ioctl (return value: %d, error no: %d)", if (ret) {
QUERY_ATTR_IDN_BOOT_LU_EN, ret, errno); fprintf(stderr,
goto out; "Error requesting ufs attr idn %d via query ioctl (return value: %d, error no: %d)",
} QUERY_ATTR_IDN_BOOT_LU_EN, ret, errno);
goto out;
}
out: out:
ufs_bsg_dev_close(); ufs_bsg_dev_close();
return ret; return ret;
} }

61
ufs-bsg.h
Unescape View File

@ -30,12 +30,11 @@
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ */
#define FNAME_SZ 64 #define FNAME_SZ 64
#define SG_IO 0x2285 #define SG_IO 0x2285
#define DWORD(b3, b2, b1, b0) htobe32((b3 << 24) | (b2 << 16) |\ #define DWORD(b3, b2, b1, b0) htobe32((b3 << 24) | (b2 << 16) | (b1 << 8) | b0)
(b1 << 8) | b0)
/* UFS BSG device node */ /* UFS BSG device node */
char ufs_bsg_dev[FNAME_SZ] = "/dev/bsg/ufs-bsg0"; char ufs_bsg_dev[FNAME_SZ] = "/dev/bsg/ufs-bsg0";
@ -44,52 +43,52 @@ int fd_ufs_bsg;
/* UPIU Transaction Codes */ /* UPIU Transaction Codes */
enum { enum {
UTP_UPIU_NOP_OUT = 0x00, UTP_UPIU_NOP_OUT = 0x00,
UTP_UPIU_COMMAND = 0x01, UTP_UPIU_COMMAND = 0x01,
UTP_UPIU_DATA_OUT = 0x02, UTP_UPIU_DATA_OUT = 0x02,
UTP_UPIU_TASK_REQ = 0x04, UTP_UPIU_TASK_REQ = 0x04,
UTP_UPIU_QUERY_REQ = 0x16, UTP_UPIU_QUERY_REQ = 0x16,
}; };
/* UPIU Query Function field */ /* UPIU Query Function field */
enum { enum {
QUERY_REQ_FUNC_STD_READ = 0x01, QUERY_REQ_FUNC_STD_READ = 0x01,
QUERY_REQ_FUNC_STD_WRITE = 0x81, QUERY_REQ_FUNC_STD_WRITE = 0x81,
}; };
enum query_req_opcode { enum query_req_opcode {
QUERY_REQ_OP_READ_DESC = 0x1, QUERY_REQ_OP_READ_DESC = 0x1,
QUERY_REQ_OP_WRITE_DESC = 0x2, QUERY_REQ_OP_WRITE_DESC = 0x2,
QUERY_REQ_OP_READ_ATTR = 0x3, QUERY_REQ_OP_READ_ATTR = 0x3,
QUERY_REQ_OP_WRITE_ATTR = 0x4, QUERY_REQ_OP_WRITE_ATTR = 0x4,
QUERY_REQ_OP_READ_FLAG = 0x5, QUERY_REQ_OP_READ_FLAG = 0x5,
QUERY_REQ_OP_SET_FLAG = 0x6, QUERY_REQ_OP_SET_FLAG = 0x6,
QUERY_REQ_OP_CLEAR_FLAG = 0x7, QUERY_REQ_OP_CLEAR_FLAG = 0x7,
QUERY_REQ_OP_TOGGLE_FLAG = 0x8, QUERY_REQ_OP_TOGGLE_FLAG = 0x8,
}; };
enum query_desc_idn { enum query_desc_idn {
QUERY_DESC_IDN_DEVICE = 0x0, QUERY_DESC_IDN_DEVICE = 0x0,
QUERY_DESC_IDN_UNIT = 0x2, QUERY_DESC_IDN_UNIT = 0x2,
QUERY_DESC_IDN_GEOMETRY = 0x7, QUERY_DESC_IDN_GEOMETRY = 0x7,
}; };
enum query_desc_size { enum query_desc_size {
QUERY_DESC_SIZE_DEVICE = 0x40, QUERY_DESC_SIZE_DEVICE = 0x40,
QUERY_DESC_SIZE_GEOMETRY = 0x48, QUERY_DESC_SIZE_GEOMETRY = 0x48,
QUERY_DESC_SIZE_UNIT = 0x23, QUERY_DESC_SIZE_UNIT = 0x23,
}; };
enum bsg_ioctl_dir { enum bsg_ioctl_dir {
BSG_IOCTL_DIR_TO_DEV, BSG_IOCTL_DIR_TO_DEV,
BSG_IOCTL_DIR_FROM_DEV, BSG_IOCTL_DIR_FROM_DEV,
}; };
enum query_attr_idn { enum query_attr_idn {
QUERY_ATTR_IDN_BOOT_LU_EN = 0x00, QUERY_ATTR_IDN_BOOT_LU_EN = 0x00,
QUERY_ATTR_IDN_RESERVED = 0x01, QUERY_ATTR_IDN_RESERVED = 0x01,
QUERY_ATTR_IDN_POWER_MODE = 0x02, QUERY_ATTR_IDN_POWER_MODE = 0x02,
QUERY_ATTR_IDN_ACTIVE_ICC_LVL = 0x03, QUERY_ATTR_IDN_ACTIVE_ICC_LVL = 0x03,
}; };
#endif /* __RECOVERY_UFS_BSG_H__ */ #endif /* __RECOVERY_UFS_BSG_H__ */

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