pax_global_header00006660000000000000000000000064143126354040014514gustar00rootroot0000000000000052 comment=77b48f092a3690d587e2d3b1e30cf8bc2abf87e7 qbootctl-0.1.2/000077500000000000000000000000001431263540400133435ustar00rootroot00000000000000qbootctl-0.1.2/.clang-format000066400000000000000000000073761431263540400157330ustar00rootroot00000000000000# SPDX-License-Identifier: GPL-2.0 # # clang-format configuration file. Intended for clang-format >= 4. # # For more information, see: # # Documentation/process/clang-format.rst # https://clang.llvm.org/docs/ClangFormat.html # https://clang.llvm.org/docs/ClangFormatStyleOptions.html # # Copied from Linux @ 5.18.0 --- AccessModifierOffset: -4 AlignAfterOpenBracket: Align AlignConsecutiveAssignments: false AlignConsecutiveDeclarations: false AlignConsecutiveMacros: AcrossEmptyLines #AlignEscapedNewlines: Left # Unknown to clang-format-4.0 AlignOperands: true AlignTrailingComments: false AllowAllParametersOfDeclarationOnNextLine: false AllowShortBlocksOnASingleLine: false AllowShortCaseLabelsOnASingleLine: false AllowShortFunctionsOnASingleLine: None AllowShortIfStatementsOnASingleLine: false AllowShortLoopsOnASingleLine: false AlwaysBreakAfterDefinitionReturnType: None AlwaysBreakAfterReturnType: None AlwaysBreakBeforeMultilineStrings: false AlwaysBreakTemplateDeclarations: false BinPackArguments: true BinPackParameters: true BraceWrapping: AfterClass: false AfterControlStatement: false AfterEnum: false AfterFunction: true AfterNamespace: true AfterObjCDeclaration: false AfterStruct: false AfterUnion: false #AfterExternBlock: false # Unknown to clang-format-5.0 BeforeCatch: false BeforeElse: false IndentBraces: false #SplitEmptyFunction: true # Unknown to clang-format-4.0 #SplitEmptyRecord: true # Unknown to clang-format-4.0 #SplitEmptyNamespace: true # Unknown to clang-format-4.0 BreakBeforeBinaryOperators: None BreakBeforeBraces: Custom #BreakBeforeInheritanceComma: false # Unknown to clang-format-4.0 BreakBeforeTernaryOperators: false BreakConstructorInitializersBeforeComma: false #BreakConstructorInitializers: BeforeComma # Unknown to clang-format-4.0 BreakAfterJavaFieldAnnotations: false BreakStringLiterals: false ColumnLimit: 80 CommentPragmas: '^ IWYU pragma:' #CompactNamespaces: false # Unknown to clang-format-4.0 ConstructorInitializerAllOnOneLineOrOnePerLine: false ConstructorInitializerIndentWidth: 8 ContinuationIndentWidth: 8 Cpp11BracedListStyle: false DerivePointerAlignment: false DisableFormat: false ExperimentalAutoDetectBinPacking: false #FixNamespaceComments: false # Unknown to clang-format-4.0 IncludeBlocks: Preserve IncludeCategories: - Regex: '.*' Priority: 1 IncludeIsMainRegex: '(Test)?$' IndentCaseLabels: false #IndentPPDirectives: None # Unknown to clang-format-5.0 IndentWidth: 8 IndentWrappedFunctionNames: false JavaScriptQuotes: Leave JavaScriptWrapImports: true KeepEmptyLinesAtTheStartOfBlocks: false MacroBlockBegin: '' MacroBlockEnd: '' MaxEmptyLinesToKeep: 1 NamespaceIndentation: None #ObjCBinPackProtocolList: Auto # Unknown to clang-format-5.0 ObjCBlockIndentWidth: 8 ObjCSpaceAfterProperty: true ObjCSpaceBeforeProtocolList: true # Taken from git's rules #PenaltyBreakAssignment: 10 # Unknown to clang-format-4.0 PenaltyBreakBeforeFirstCallParameter: 30 PenaltyBreakComment: 10 PenaltyBreakFirstLessLess: 0 PenaltyBreakString: 10 PenaltyExcessCharacter: 100 PenaltyReturnTypeOnItsOwnLine: 60 PointerAlignment: Right ReflowComments: false SortIncludes: false #SortUsingDeclarations: false # Unknown to clang-format-4.0 SpaceAfterCStyleCast: false SpaceAfterTemplateKeyword: true SpaceBeforeAssignmentOperators: true #SpaceBeforeCtorInitializerColon: true # Unknown to clang-format-5.0 #SpaceBeforeInheritanceColon: true # Unknown to clang-format-5.0 SpaceBeforeParens: ControlStatements #SpaceBeforeRangeBasedForLoopColon: true # Unknown to clang-format-5.0 SpaceInEmptyParentheses: false SpacesBeforeTrailingComments: 1 SpacesInAngles: false SpacesInContainerLiterals: false SpacesInCStyleCastParentheses: false SpacesInParentheses: false SpacesInSquareBrackets: false Standard: Cpp03 TabWidth: 8 UseTab: Always ... qbootctl-0.1.2/.gitignore000066400000000000000000000000451431263540400153320ustar00rootroot00000000000000.vscode/ .push.settings.jsonc build/ qbootctl-0.1.2/LICENSE000066400000000000000000001045151431263540400143560ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works. The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. 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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 . 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 . qbootctl-0.1.2/README.md000066400000000000000000000024001431263540400146160ustar00rootroot00000000000000# Qualcomm bootctl HAL for Linux This HAL was pulled from AOSP source code and bastardised to build and run on a musl/glibc system. This may or may not render any hardware you run it on unusable, you have been warned. ## Dependencies * zlib-dev * meson * cmake * linux-headers ## Building qbootctl uses the meson build system ```sh meson build meson compile -C build ``` ## Usage ```text qbootctl: qcom bootctrl HAL port for Linux ------------------------------------------- qbootctl [-c|-m|-s|-u|-b|-n|-x] [SLOT] dump slot info (default) -h this help text -c get the current slot -b SLOT check if SLOT is marked as bootable -n SLOT check if SLOT is marked as successful -x [SLOT] get the slot suffix for SLOT (default: current) -s SLOT set to active slot to SLOT -m [SLOT] mark a boot as successful (default: current) -u [SLOT] mark SLOT as unbootable (default: current) ``` ## Debugging Set `DEBUG` to 1 in `utils.h` to enable debug logging. ## Documentation A more details explanation and a list of devices where qbootctl has been validated can be found [on the postmarketOS wiki](https://wiki.postmarketos.org/wiki/Android_AB_Slots): qbootctl-0.1.2/bootctrl.h000066400000000000000000000072651431263540400153560ustar00rootroot00000000000000/* * Copyright (C) 2016 The Android Open Source Project * Copyright (C) 2022 Caleb Connolly * * 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 . */ #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__ qbootctl-0.1.2/bootctrl_impl.cpp000066400000000000000000000511111431263540400167170ustar00rootroot00000000000000/* * Copyright (c) 2016, The Linux Foundation. All rights reserved. * Copyright (C) 2021-2022 Caleb Connolly * * 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 . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "utils.h" #include "gpt-utils.h" #include "ufs-bsg.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 0; } 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 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::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 > ptn_map; vector ptn_vec; const char ptn_list[][MAX_GPT_NAME_SIZE] = { AB_PTN_LIST }; uint32_t i; int rc = -1; map >::iterator map_iter; bool ismmc; if (boot_control_check_slot_sanity(slot)) { fprintf(stderr, "%s: Bad arguments\n", __func__); goto error; } ismmc = gpt_utils_is_partition_backed_by_emmc(PTN_XBL AB_SLOT_A_SUFFIX); if (!ismmc && ufs_bsg_dev_open() < 0) { 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 (!ismmc && !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]--> // [path_to_block_device_2]--> // ... // ... // eg: // [/dev/block/sdb]---> 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; } } // EMMC doesn't need attributes to be set. if (ismmc) return 0; 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, }; qbootctl-0.1.2/bootctrl_test.cpp000066400000000000000000000040161431263540400167370ustar00rootroot00000000000000/* * Copyright (C) 2016 The Android Open Source Project * Copyright (C) 2022 Caleb Connolly * * 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 . */ #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, };qbootctl-0.1.2/gpt-utils.cpp000066400000000000000000000604461431263540400160110ustar00rootroot00000000000000/* * Copyright (c) 2013, The Linux Foundation. All rights reserved. * Copyright (C) 2021-2022 Caleb Connolly * * 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. * * Neither the name of The Linux Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT * 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. */ #define _LARGEFILE64_SOURCE /* enable lseek64() */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "utils.h" #include "gpt-utils.h" /* list the names of the backed-up partitions to be swapped */ /* extension used for the backup partitions - tzbak, abootbak, etc. */ #define BAK_PTN_NAME_EXT "bak" #define XBL_PRIMARY "/dev/disk/by-partlabel/xbl_a" // FIXME #define XBL_BACKUP "/dev/disk/by-partlabel/xblbak" #define XBL_AB_PRIMARY "/dev/disk/by-partlabel/xbl_a" #define XBL_AB_SECONDARY "/dev/disk/by-partlabel/xbl_b" /* GPT defines */ #define MAX_LUNS 26 //Size of the buffer that needs to be passed to the UFS ioctl #define UFS_ATTR_DATA_SIZE 32 //This will allow us to get the root lun path from the path to the partition. //i.e: from /dev/disk/sdaXXX get /dev/disk/sda. The assumption here is that //the boot critical luns lie between sda to sdz which is acceptable because //only user added external disks,etc would lie beyond that limit which do not //contain partitions that interest us here. #define PATH_TRUNCATE_LOC (sizeof("/dev/sda") - 1) //From /dev/disk/sda get just sda #define LUN_NAME_START_LOC (sizeof("/dev/") - 1) #define BOOT_LUN_A_ID 1 #define BOOT_LUN_B_ID 2 /****************************************************************************** * MACROS ******************************************************************************/ #define GET_4_BYTES(ptr) \ ((uint32_t) * ((uint8_t *)(ptr)) | \ ((uint32_t) * ((uint8_t *)(ptr) + 1) << 8) | \ ((uint32_t) * ((uint8_t *)(ptr) + 2) << 16) | \ ((uint32_t) * ((uint8_t *)(ptr) + 3) << 24)) #define GET_8_BYTES(ptr) \ ((uint64_t) * ((uint8_t *)(ptr)) | \ ((uint64_t) * ((uint8_t *)(ptr) + 1) << 8) | \ ((uint64_t) * ((uint8_t *)(ptr) + 2) << 16) | \ ((uint64_t) * ((uint8_t *)(ptr) + 3) << 24) | \ ((uint64_t) * ((uint8_t *)(ptr) + 4) << 32) | \ ((uint64_t) * ((uint8_t *)(ptr) + 5) << 40) | \ ((uint64_t) * ((uint8_t *)(ptr) + 6) << 48) | \ ((uint64_t) * ((uint8_t *)(ptr) + 7) << 56)) #define PUT_4_BYTES(ptr, y) \ *((uint8_t *)(ptr)) = (y)&0xff; \ *((uint8_t *)(ptr) + 1) = ((y) >> 8) & 0xff; \ *((uint8_t *)(ptr) + 2) = ((y) >> 16) & 0xff; \ *((uint8_t *)(ptr) + 3) = ((y) >> 24) & 0xff; /****************************************************************************** * TYPES ******************************************************************************/ using namespace std; enum gpt_state { GPT_OK = 0, GPT_BAD_SIGNATURE, GPT_BAD_CRC }; //List of LUN's containing boot critical images. //Required in the case of UFS devices struct update_data { char lun_list[MAX_LUNS][PATH_MAX]; uint32_t num_valid_entries; }; /****************************************************************************** * FUNCTIONS ******************************************************************************/ void DumpHex(const void *data, size_t size) { char ascii[17]; size_t i, j; ascii[16] = '\0'; for (i = 0; i < size; ++i) { printf("%02X ", ((unsigned char *)data)[i]); if (((unsigned char *)data)[i] >= ' ' && ((unsigned char *)data)[i] <= '~') { ascii[i % 16] = ((unsigned char *)data)[i]; } else { ascii[i % 16] = '.'; } if ((i + 1) % 8 == 0 || i + 1 == size) { printf(" "); if ((i + 1) % 16 == 0) { printf("| %s \n", ascii); } else if (i + 1 == size) { ascii[(i + 1) % 16] = '\0'; if ((i + 1) % 16 <= 8) { printf(" "); } for (j = (i + 1) % 16; j < 16; ++j) { printf(" "); } printf("| %s \n", ascii); } } } } /** * ========================================================================== * * \brief Read/Write len bytes from/to block dev * * \param [in] fd block dev file descriptor (returned from open) * \param [in] rw RW flag: 0 - read, != 0; - write * \param [in] offset block dev offset [bytes] - RW start position * \param [in] buf Pointer to the buffer containing the data * \param [in] len RW size in bytes. Buf must be at least that big * * \return 0 on success * * ========================================================================== */ static int blk_rw(int fd, int rw, uint64_t offset, uint8_t *buf, unsigned len) { int r; if (lseek64(fd, offset, SEEK_SET) < 0) { fprintf(stderr, "block dev lseek64 %" PRIu64 " failed: %s\n", offset, strerror(errno)); return -1; } if (rw) r = write(fd, buf, len); else r = read(fd, buf, len); if (r < 0) { fprintf(stderr, "block dev %s failed: %s\n", rw ? "write" : "read\n", strerror(errno)); } else { if (rw) { r = fsync(fd); if (r < 0) fprintf(stderr, "fsync failed: %s\n", strerror(errno)); } else { r = 0; } } return r; } /** * ========================================================================== * * \brief Search within GPT for partition entry with the given name * or it's backup twin (name-bak). * * \param [in] ptn_name Partition name to seek * \param [in] pentries_start Partition entries array start pointer * \param [in] pentries_end Partition entries array end pointer * \param [in] pentry_size Single partition entry size [bytes] * * \return First partition entry pointer that matches the name or NULL * * ========================================================================== */ static uint8_t *gpt_pentry_seek(const char *ptn_name, const uint8_t *pentries_start, const uint8_t *pentries_end, uint32_t pentry_size) { char *pentry_name; unsigned len = strlen(ptn_name); for (pentry_name = (char *)(pentries_start + PARTITION_NAME_OFFSET); pentry_name < (char *)pentries_end; pentry_name += pentry_size) { char name8[MAX_GPT_NAME_SIZE / 2]; unsigned i; /* Partition names in GPT are UTF-16 - ignoring UTF-16 2nd byte */ for (i = 0; i < sizeof(name8); i++) name8[i] = pentry_name[i * 2]; if (!strncmp(ptn_name, name8, len)) if (name8[len] == 0 || !strcmp(&name8[len], BAK_PTN_NAME_EXT)) return (uint8_t *)(pentry_name - PARTITION_NAME_OFFSET); } return NULL; } // Defined in ufs-bsg.cpp int32_t set_boot_lun(uint8_t lun_id); //Swtich betwieen using either the primary or the backup //boot LUN for boot. This is required since UFS boot partitions //cannot have a backup GPT which is what we use for failsafe //updates of the other 'critical' partitions. This function will //not be invoked for emmc targets and on UFS targets is only required //to be invoked for XBL. // //The algorithm to do this is as follows: //- Find the real block device(eg: /dev/disk/sdb) that corresponds // to the /dev/disk/bootdevice/by-name/xbl(bak) symlink // //- Once we have the block device 'node' name(sdb in the above example) // use this node to to locate the scsi generic device that represents // it by checking the file /sys/block/sdb/device/scsi_generic/sgY // //- Once we locate sgY we call the query ioctl on /dev/sgy to switch //the boot lun to either LUNA or LUNB int gpt_utils_set_xbl_boot_partition(enum boot_chain chain) { struct stat st; uint8_t boot_lun_id = 0; const char *boot_dev = NULL; (void)st; (void)boot_dev; if (chain == BACKUP_BOOT) { boot_lun_id = BOOT_LUN_B_ID; if (!stat(XBL_BACKUP, &st)) boot_dev = XBL_BACKUP; else if (!stat(XBL_AB_SECONDARY, &st)) boot_dev = XBL_AB_SECONDARY; else { fprintf(stderr, "%s: Failed to locate secondary xbl\n", __func__); goto error; } } else if (chain == NORMAL_BOOT) { boot_lun_id = BOOT_LUN_A_ID; if (!stat(XBL_PRIMARY, &st)) boot_dev = XBL_PRIMARY; else if (!stat(XBL_AB_PRIMARY, &st)) boot_dev = XBL_AB_PRIMARY; else { fprintf(stderr, "%s: Failed to locate primary xbl\n", __func__); goto error; } } else { fprintf(stderr, "%s: Invalid boot chain id\n", __func__); goto error; } //We need either both xbl and xblbak or both xbl_a and xbl_b to exist at //the same time. If not the current configuration is invalid. if ((stat(XBL_PRIMARY, &st) || stat(XBL_BACKUP, &st)) && (stat(XBL_AB_PRIMARY, &st) || stat(XBL_AB_SECONDARY, &st))) { fprintf(stderr, "%s:primary/secondary XBL prt not found(%s)\n", __func__, strerror(errno)); goto error; } LOGD("%s: setting %s lun as boot lun\n", __func__, boot_dev); if (set_boot_lun(boot_lun_id)) { goto error; } return 0; error: return -1; } //Given a parttion name(eg: rpm) get the path to the block device that //represents the GPT disk the partition resides on. In the case of emmc it //would be the default emmc dev(/dev/mmcblk0). In the case of UFS we look //through the /dev/disk/bootdevice/by-name/ tree for partname, and resolve //the path to the LUN from there. static int get_dev_path_from_partition_name(const char *partname, char *buf, size_t buflen) { struct stat st; char path[PATH_MAX] = { 0 }; int i; (void)st; if (!partname || !buf || buflen < ((PATH_TRUNCATE_LOC) + 1)) { fprintf(stderr, "%s: Invalid argument\n", __func__); return -1; } //Need to find the lun that holds partition partname snprintf(path, sizeof(path), "%s/%s", BOOT_DEV_DIR, partname); // if (rc = stat(path, &st)) { // LOGD("stat failed: errno=%d\n", errno); // goto error; // } buf = realpath(path, buf); if (!buf) { return -1; } else { for (i = strlen(buf); i > 0; i--) if (!isdigit(buf[i - 1])) break; if (i >= 2 && buf[i - 1] == 'p' && isdigit(buf[i - 2])) i--; buf[i] = 0; } return 0; } int gpt_utils_get_partition_map(vector &ptn_list, map > &partition_map) { char devpath[PATH_MAX] = { '\0' }; map >::iterator it; if (ptn_list.size() < 1) { fprintf(stderr, "%s: Invalid ptn list\n", __func__); return -1; } //Go through the passed in list for (uint32_t i = 0; i < ptn_list.size(); i++) { //Key in the map is the path to the device that holds the //partition if (get_dev_path_from_partition_name( ptn_list[i].c_str(), devpath, sizeof(devpath))) { //Not necessarily an error. The partition may just //not be present. continue; } string path = devpath; it = partition_map.find(path); if (it != partition_map.end()) { it->second.push_back(ptn_list[i]); } else { vector str_vec; str_vec.push_back(ptn_list[i]); partition_map.insert( pair >(path, str_vec)); } memset(devpath, '\0', sizeof(devpath)); } return 0; } //Get the block size of the disk represented by decsriptor fd static uint32_t gpt_get_block_size(int fd) { uint32_t block_size = 0; if (fd < 0) { fprintf(stderr, "%s: invalid descriptor\n", __func__); goto error; } if (ioctl(fd, BLKSSZGET, &block_size) != 0) { fprintf(stderr, "%s: Failed to get GPT dev block size : %s\n", __func__, strerror(errno)); goto error; } return block_size; error: return 0; } //Write the GPT header present in the passed in buffer back to the //disk represented by fd static int gpt_set_header(uint8_t *gpt_header, int fd, enum gpt_instance instance) { uint32_t block_size = 0; off_t gpt_header_offset = 0; if (!gpt_header || fd < 0) { fprintf(stderr, "%s: Invalid arguments\n", __func__); goto error; } block_size = gpt_get_block_size(fd); LOGD("%s: Block size is : %d\n", __func__, block_size); if (block_size == 0) { fprintf(stderr, "%s: Failed to get block size\n", __func__); goto error; } if (instance == PRIMARY_GPT) gpt_header_offset = block_size; else gpt_header_offset = lseek64(fd, 0, SEEK_END) - block_size; if (gpt_header_offset <= 0) { fprintf(stderr, "%s: Failed to get gpt header offset\n", __func__); goto error; } LOGD("%s: Writing back header to offset %ld\n", __func__, gpt_header_offset); if (blk_rw(fd, 1, gpt_header_offset, gpt_header, block_size)) { fprintf(stderr, "%s: Failed to write back GPT header\n", __func__); goto error; } return 0; error: return -1; } //Read out the GPT header for the disk that contains the partition partname static uint8_t *gpt_get_header(const char *partname, enum gpt_instance instance) { uint8_t *hdr = NULL; char devpath[PATH_MAX] = { 0 }; uint64_t hdr_offset = 0; uint32_t block_size = 0; int fd = -1; if (!partname) { fprintf(stderr, "%s: Invalid partition name\n", __func__); goto error; } if (get_dev_path_from_partition_name(partname, devpath, sizeof(devpath)) != 0) { fprintf(stderr, "%s: Failed to resolve path for %s\n", __func__, partname); goto error; } fd = open(devpath, O_RDWR); if (fd < 0) { fprintf(stderr, "%s: Failed to open %s : %s\n", __func__, devpath, strerror(errno)); goto error; } block_size = gpt_get_block_size(fd); if (block_size == 0) { fprintf(stderr, "%s: Failed to get gpt block size for %s\n", __func__, partname); goto error; } hdr = (uint8_t *)calloc(block_size, 1); if (!hdr) { fprintf(stderr, "%s: Failed to allocate memory for gpt header\n", __func__); } if (instance == PRIMARY_GPT) hdr_offset = block_size; else { hdr_offset = lseek64(fd, 0, SEEK_END) - block_size; } if (hdr_offset < 0) { fprintf(stderr, "%s: Failed to get gpt header offset\n", __func__); goto error; } if (blk_rw(fd, 0, hdr_offset, hdr, block_size)) { fprintf(stderr, "%s: Failed to read GPT header from device\n", __func__); goto error; } //DumpHex(hdr, block_size); close(fd); return hdr; error: if (fd >= 0) close(fd); if (hdr) free(hdr); return NULL; } //Returns the partition entry array based on the //passed in buffer which contains the gpt header. //The fd here is the descriptor for the 'disk' which //holds the partition static uint8_t *gpt_get_pentry_arr(uint8_t *hdr, int fd) { uint64_t pentries_start = 0; uint32_t pentry_size = 0; uint32_t block_size = 0; uint32_t pentries_arr_size = 0; uint8_t *pentry_arr = NULL; int rc = 0; if (!hdr) { fprintf(stderr, "%s: Invalid header\n", __func__); goto error; } if (fd < 0) { fprintf(stderr, "%s: Invalid fd\n", __func__); goto error; } block_size = gpt_get_block_size(fd); if (!block_size) { fprintf(stderr, "%s: Failed to get gpt block size for\n", __func__); goto error; } pentries_start = GET_8_BYTES(hdr + PENTRIES_OFFSET) * block_size; pentry_size = GET_4_BYTES(hdr + PENTRY_SIZE_OFFSET); pentries_arr_size = GET_4_BYTES(hdr + PARTITION_COUNT_OFFSET) * pentry_size; pentry_arr = (uint8_t *)calloc(1, pentries_arr_size); if (!pentry_arr) { fprintf(stderr, "%s: Failed to allocate memory for partition array\n", __func__); goto error; } rc = blk_rw(fd, 0, pentries_start, pentry_arr, pentries_arr_size); if (rc) { fprintf(stderr, "%s: Failed to read partition entry array\n", __func__); goto error; } return pentry_arr; error: if (pentry_arr) free(pentry_arr); return NULL; } static int gpt_set_pentry_arr(uint8_t *hdr, int fd, uint8_t *arr) { uint32_t block_size = 0; uint64_t pentries_start = 0; uint32_t pentry_size = 0; uint32_t pentries_arr_size = 0; int rc = 0; if (!hdr || fd < 0 || !arr) { fprintf(stderr, "%s: Invalid argument\n", __func__); goto error; } block_size = gpt_get_block_size(fd); if (!block_size) { fprintf(stderr, "%s: Failed to get gpt block size for\n", __func__); goto error; } LOGD("%s : Block size is %d\n", __func__, block_size); pentries_start = GET_8_BYTES(hdr + PENTRIES_OFFSET) * block_size; pentry_size = GET_4_BYTES(hdr + PENTRY_SIZE_OFFSET); pentries_arr_size = GET_4_BYTES(hdr + PARTITION_COUNT_OFFSET) * pentry_size; LOGD("%s: Writing partition entry array of size %d to offset %" PRIu64 "\n", __func__, pentries_arr_size, pentries_start); LOGD("pentries_start: %lu\n", pentries_start); rc = blk_rw(fd, 1, pentries_start, arr, pentries_arr_size); if (rc) { fprintf(stderr, "%s: Failed to read partition entry array\n", __func__); goto error; } return 0; error: return -1; } //Allocate a handle used by calls to the "gpt_disk" api's struct gpt_disk *gpt_disk_alloc() { struct gpt_disk *disk; disk = (struct gpt_disk *)malloc(sizeof(struct gpt_disk)); if (!disk) { fprintf(stderr, "%s: Failed to allocate memory\n", __func__); goto end; } memset(disk, 0, sizeof(struct gpt_disk)); end: return disk; } //Free previously allocated/initialized handle void gpt_disk_free(struct gpt_disk *disk) { if (!disk) return; if (disk->hdr) free(disk->hdr); if (disk->hdr_bak) free(disk->hdr_bak); if (disk->pentry_arr) free(disk->pentry_arr); if (disk->pentry_arr_bak) free(disk->pentry_arr_bak); free(disk); return; } //fills up the passed in gpt_disk struct with information about the //disk represented by path dev. Returns 0 on success and -1 on error. int gpt_disk_get_disk_info(const char *dev, struct gpt_disk *dsk) { struct gpt_disk *disk = NULL; int fd = -1; uint32_t gpt_header_size = 0; if (!dsk || !dev) { fprintf(stderr, "%s: Invalid arguments\n", __func__); goto error; } disk = dsk; disk->hdr = gpt_get_header(dev, PRIMARY_GPT); if (!disk->hdr) { fprintf(stderr, "%s: Failed to get primary header\n", __func__); goto error; } gpt_header_size = GET_4_BYTES(disk->hdr + HEADER_SIZE_OFFSET); // FIXME: pointer offsets crc bleh disk->hdr_crc = crc32(0, disk->hdr, gpt_header_size); disk->hdr_bak = gpt_get_header(dev, PRIMARY_GPT); if (!disk->hdr_bak) { fprintf(stderr, "%s: Failed to get backup header\n", __func__); goto error; } disk->hdr_bak_crc = crc32(0, disk->hdr_bak, gpt_header_size); //Descriptor for the block device. We will use this for further //modifications to the partition table if (get_dev_path_from_partition_name(dev, disk->devpath, sizeof(disk->devpath)) != 0) { fprintf(stderr, "%s: Failed to resolve path for %s\n", __func__, dev); goto error; } fd = open(disk->devpath, O_RDWR); if (fd < 0) { fprintf(stderr, "%s: Failed to open %s: %s\n", __func__, disk->devpath, strerror(errno)); goto error; } disk->pentry_arr = gpt_get_pentry_arr(disk->hdr, fd); if (!disk->pentry_arr) { fprintf(stderr, "%s: Failed to obtain partition entry array\n", __func__); goto error; } disk->pentry_arr_bak = gpt_get_pentry_arr(disk->hdr_bak, fd); if (!disk->pentry_arr_bak) { fprintf(stderr, "%s: Failed to obtain backup partition entry array\n", __func__); goto error; } disk->pentry_size = GET_4_BYTES(disk->hdr + PENTRY_SIZE_OFFSET); disk->pentry_arr_size = GET_4_BYTES(disk->hdr + PARTITION_COUNT_OFFSET) * disk->pentry_size; disk->pentry_arr_crc = GET_4_BYTES(disk->hdr + PARTITION_CRC_OFFSET); disk->pentry_arr_bak_crc = GET_4_BYTES(disk->hdr_bak + PARTITION_CRC_OFFSET); disk->block_size = gpt_get_block_size(fd); close(fd); disk->is_initialized = GPT_DISK_INIT_MAGIC; return 0; error: if (fd >= 0) close(fd); return -1; } //Get pointer to partition entry from a allocated gpt_disk structure uint8_t *gpt_disk_get_pentry(struct gpt_disk *disk, const char *partname, enum gpt_instance instance) { uint8_t *ptn_arr = NULL; if (!disk || !partname || disk->is_initialized != GPT_DISK_INIT_MAGIC) { fprintf(stderr, "%s: Invalid argument\n", __func__); goto error; } ptn_arr = (instance == PRIMARY_GPT) ? disk->pentry_arr : disk->pentry_arr_bak; return (gpt_pentry_seek(partname, ptn_arr, ptn_arr + disk->pentry_arr_size, disk->pentry_size)); error: return NULL; } //Update CRC values for the various components of the gpt_disk //structure. This function should be called after any of the fields //have been updated before the structure contents are written back to //disk. int gpt_disk_update_crc(struct gpt_disk *disk) { uint32_t gpt_header_size = 0; if (!disk || (disk->is_initialized != GPT_DISK_INIT_MAGIC)) { fprintf(stderr, "%s: invalid argument\n", __func__); goto error; } //Recalculate the CRC of the primary partiton array disk->pentry_arr_crc = crc32(0, disk->pentry_arr, disk->pentry_arr_size); //Recalculate the CRC of the backup partition array disk->pentry_arr_bak_crc = crc32(0, disk->pentry_arr_bak, disk->pentry_arr_size); //Update the partition CRC value in the primary GPT header PUT_4_BYTES(disk->hdr + PARTITION_CRC_OFFSET, disk->pentry_arr_crc); //Update the partition CRC value in the backup GPT header PUT_4_BYTES(disk->hdr_bak + PARTITION_CRC_OFFSET, disk->pentry_arr_bak_crc); //Update the CRC value of the primary header gpt_header_size = GET_4_BYTES(disk->hdr + HEADER_SIZE_OFFSET); //Header CRC is calculated with its own CRC field set to 0 PUT_4_BYTES(disk->hdr + HEADER_CRC_OFFSET, 0); PUT_4_BYTES(disk->hdr_bak + HEADER_CRC_OFFSET, 0); disk->hdr_crc = crc32(0, disk->hdr, gpt_header_size); disk->hdr_bak_crc = crc32(0, disk->hdr_bak, gpt_header_size); PUT_4_BYTES(disk->hdr + HEADER_CRC_OFFSET, disk->hdr_crc); PUT_4_BYTES(disk->hdr_bak + HEADER_CRC_OFFSET, disk->hdr_bak_crc); return 0; error: return -1; } //Write the contents of struct gpt_disk back to the actual disk int gpt_disk_commit(struct gpt_disk *disk) { int fd = -1; if (!disk || (disk->is_initialized != GPT_DISK_INIT_MAGIC)) { fprintf(stderr, "%s: Invalid args\n", __func__); goto error; } fd = open(disk->devpath, O_RDWR); if (fd < 0) { fprintf(stderr, "%s: Failed to open %s: %s\n", __func__, disk->devpath, strerror(errno)); goto error; } LOGD("%s: Writing back primary GPT header\n", __func__); //Write the primary header if (gpt_set_header(disk->hdr, fd, PRIMARY_GPT) != 0) { fprintf(stderr, "%s: Failed to update primary GPT header\n", __func__); goto error; } LOGD("%s: Writing back primary partition array\n", __func__); //Write back the primary partition array if (gpt_set_pentry_arr(disk->hdr, fd, disk->pentry_arr)) { fprintf(stderr, "%s: Failed to write primary GPT partition arr\n", __func__); goto error; } fsync(fd); close(fd); return 0; error: if (fd >= 0) close(fd); return -1; } //Determine whether to handle the given partition as eMMC or UFS, using the //name of the backing device. // //Note: In undefined cases (i.e. /dev/mmcblk1 and unresolvable), this function //will tend to prefer UFS behavior. If it incorrectly reports this, then the //program should exit (e.g. by failing) before making any changes. bool gpt_utils_is_partition_backed_by_emmc(const char *part) { char devpath[PATH_MAX] = { '\0' }; if (get_dev_path_from_partition_name(part, devpath, sizeof(devpath))) return false; return !strcmp(devpath, EMMC_DEVICE); } qbootctl-0.1.2/gpt-utils.h000066400000000000000000000146031431263540400154500ustar00rootroot00000000000000/* * Copyright (c) 2013, The Linux Foundation. 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. * * Neither the name of The Linux Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT * 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. */ #ifndef __GPT_UTILS_H__ #define __GPT_UTILS_H__ #include #include #include #ifdef __cplusplus extern "C" { #endif #include #include #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 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 //Bit 48 onwords in the attribute field are the ones where we are allowed to //store our AB attributes. #define AB_FLAG_OFFSET (ATTRIBUTE_FLAG_OFFSET + 6) #define GPT_DISK_INIT_MAGIC 0xABCD #define AB_PARTITION_ATTR_SLOT_ACTIVE (0x1 << 2) #define AB_PARTITION_ATTR_BOOT_SUCCESSFUL (0x1 << 6) #define AB_PARTITION_ATTR_UNBOOTABLE (0x1 << 7) #define AB_SLOT_ACTIVE_VAL 0xF #define AB_SLOT_INACTIVE_VAL 0x0 #define AB_SLOT_ACTIVE 1 #define AB_SLOT_INACTIVE 0 #define AB_SLOT_A_SUFFIX "_a" #define AB_SLOT_B_SUFFIX "_b" #define PTN_XBL "xbl" #define PTN_SWAP_LIST \ PTN_XBL, "abl", "aop", "apdp", "cmnlib", "cmnlib64", "devcfg", "dtbo", \ "hyp", "keymaster", "msadp", "qupfw", "storsec", "tz", \ "vbmeta", "vbmeta_system", "xbl_config" #define AB_PTN_LIST \ PTN_SWAP_LIST, "boot", "system", "vendor", "modem", "system_ext", \ "product" #define BOOT_DEV_DIR "/dev/disk/by-partlabel" #define EMMC_DEVICE "/dev/mmcblk0" #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) enum gpt_instance { PRIMARY_GPT = 0, SECONDARY_GPT }; enum boot_chain { NORMAL_BOOT = 0, BACKUP_BOOT }; struct gpt_disk { //GPT primary header uint8_t *hdr; //primary header crc uint32_t hdr_crc; //GPT backup header uint8_t *hdr_bak; //backup header crc uint32_t hdr_bak_crc; //Partition entries array uint8_t *pentry_arr; //Partition entries array for backup table uint8_t *pentry_arr_bak; //Size of the pentry array uint32_t pentry_arr_size; //Size of each element in the pentry array uint32_t pentry_size; //CRC of the partition entry array uint32_t pentry_arr_crc; //CRC of the backup partition entry array uint32_t pentry_arr_bak_crc; //Path to block dev representing the disk char devpath[PATH_MAX]; //Block size of disk uint32_t block_size; uint32_t is_initialized; }; //GPT disk methods struct gpt_disk *gpt_disk_alloc(); //Free previously allocated gpt_disk struct void gpt_disk_free(struct gpt_disk *disk); //Get the details of the disk holding the partition whose name //is passed in via dev int gpt_disk_get_disk_info(const char *dev, struct gpt_disk *disk); //Get pointer to partition entry from a allocated gpt_disk structure uint8_t *gpt_disk_get_pentry(struct gpt_disk *disk, const char *partname, enum gpt_instance instance); //Update the crc fields of the modified disk structure int gpt_disk_update_crc(struct gpt_disk *disk); //Write the contents of struct gpt_disk back to the actual disk int gpt_disk_commit(struct gpt_disk *disk); //Swtich betwieen using either the primary or the backup //boot LUN for boot. This is required since UFS boot partitions //cannot have a backup GPT which is what we use for failsafe //updates of the other 'critical' partitions. This function will //not be invoked for emmc targets and on UFS targets is only required //to be invoked for XBL. // //The algorithm to do this is as follows: //- Find the real block device(eg: /dev/block/sdb) that corresponds // to the /dev/block/bootdevice/by-name/xbl(bak) symlink // //- Once we have the block device 'node' name(sdb in the above example) // use this node to to locate the scsi generic device that represents // it by checking the file /sys/block/sdb/device/scsi_generic/sgY // //- Once we locate sgY we call the query ioctl on /dev/sgy to switch //the boot lun to either LUNA or LUNB int gpt_utils_set_xbl_boot_partition(enum boot_chain chain); //Given a vector of partition names as a input and a reference to a map, //populate the map to indicate which physical disk each of the partitions //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 //the passed in partition names sits on that device. int gpt_utils_get_partition_map( std::vector &partition_list, std::map > &partition_map); bool gpt_utils_is_partition_backed_by_emmc(const char *part); #ifdef __cplusplus } #endif #endif /* __GPT_UTILS_H__ */ qbootctl-0.1.2/meson.build000066400000000000000000000006051431263540400155060ustar00rootroot00000000000000project('qbootctl', 'cpp') deps = [ dependency('zlib'), ] src = [ 'qbootctl.cpp', 'bootctrl_impl.cpp', 'bootctrl_test.cpp', 'gpt-utils.cpp', 'ufs-bsg.cpp', ] inc = [ include_directories('.'), ] executable('qbootctl', src, include_directories: inc, dependencies: deps, install: true, c_args: [], ) qbootctl-0.1.2/qbootctl.cpp000066400000000000000000000122121431263540400156740ustar00rootroot00000000000000/* * Copyright (C) 2022 Caleb Connolly * * 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 . */ #include #include #include #include #include #include #include #include #include #include #include "bootctrl.h" const struct boot_control_module *impl = &bootctl; bool isslot(const char* str) { return strspn(str, "01abAB") == strlen(str); } bool isslotnum(const char* str) { return strspn(str, "01") == strlen(str); } unsigned parseSlot(const char* arg) { char *end; int slot; if (!isslot(arg)) { goto fail; } if (isslotnum(arg)) { slot = (int)strtol(arg, &end, 10); if (end == arg) goto fail; } else { switch (arg[0]) { case 'a': case 'A': slot = 0; break; case 'b': case 'B': slot = 1; break; default: goto fail; } } return (unsigned)slot; fail: fprintf(stderr, "Expected slot not '%s'\n", arg); exit(1); } int usage() { fprintf(stderr, "qbootctl: qcom bootctrl HAL port for Linux\n"); fprintf(stderr, "-------------------------------------------\n"); fprintf(stderr, "qbootctl [-c|-m|-s|-u|-b|-n|-x] [SLOT]\n\n"); fprintf(stderr, " dump slot info (default)\n"); fprintf(stderr, " -h this help text\n"); fprintf(stderr, " -c get the current slot\n"); fprintf(stderr, " -a get the active slot\n"); fprintf(stderr, " -b SLOT check if SLOT is marked as bootable\n"); fprintf(stderr, " -n SLOT check if SLOT is marked as successful\n"); fprintf(stderr, " -x [SLOT] get the slot suffix for SLOT (default: current)\n"); fprintf(stderr, " -s SLOT set to active slot to SLOT\n"); fprintf(stderr, " -m [SLOT] mark a boot as successful (default: current)\n"); fprintf(stderr, " -u [SLOT] mark SLOT as unbootable (default: current)\n"); return 1; } int get_slot_info(struct slot_info *slots) { int rc; uint32_t active_slot = impl->getActiveBootSlot(); slots[active_slot].active = true; for (size_t i = 0; i < 2; i++) { rc = impl->isSlotMarkedSuccessful(i); if (rc < 0) return rc; slots[i].successful = rc; rc = impl->isSlotBootable(i); if (rc < 0) return rc; slots[i].bootable = rc; } return 0; } void dump_info() { struct slot_info slots[2] = { { 0 } }; int current_slot = impl->getCurrentSlot(); get_slot_info(slots); printf("Current slot: %s\n", current_slot >= 0 ? impl->getSuffix(current_slot) : "N/A"); for (size_t i = 0; i < 2; i++) { printf("SLOT %s:\n", impl->getSuffix(i)); printf("\tActive : %d\n", slots[i].active); printf("\tSuccessful : %d\n", slots[i].successful); printf("\tBootable : %d\n", slots[i].bootable); } } int main(int argc, char **argv) { int optflag; int slot = -1; int rc; const char* IS_TEST = getenv("QBOOTCTL_TEST"); if (IS_TEST) { impl = &bootctl_test; } if(geteuid() != 0) { fprintf(stderr, "This program must be run as root!\n"); return 1; } switch (argc) { case 1: dump_info(); return 0; case 2: break; case 3: slot = parseSlot(argv[2]); break; default: return usage(); } if (slot < 0) slot = impl->getCurrentSlot(); optflag = getopt(argc, argv, "hcmas:ub:n:x"); switch (optflag) { case 'c': slot = impl->getCurrentSlot(); printf("Current slot: %s\n", impl->getSuffix(slot)); return 0; case 'a': slot = impl->getActiveBootSlot(); printf("Active slot: %s\n", impl->getSuffix(slot)); return 0; case 'b': printf("SLOT %s: is %smarked bootable\n", impl->getSuffix(slot), impl->isSlotBootable(slot) == 1 ? "" : "not "); return 0; case 'n': printf("SLOT %s: is %smarked successful\n", impl->getSuffix(slot), impl->isSlotMarkedSuccessful(slot) == 1 ? "" : "not "); return 0; case 'x': printf("%s\n", impl->getSuffix(slot)); return 0; case 's': rc = impl->setActiveBootSlot(slot); if (rc < 0) { fprintf(stderr, "SLOT %s: Failed to set active\n", impl->getSuffix(slot)); return 1; } printf("SLOT %d: Set as active slot\n", slot); return 0; case 'm': rc = impl->markBootSuccessful(slot); if (rc < 0) return 1; printf("SLOT %s: Marked boot successful\n", impl->getSuffix(slot)); return 0; case 'u': rc = impl->setSlotAsUnbootable(slot); if (rc < 0) { fprintf(stderr, "SLOT %s: Failed to set as unbootable\n", impl->getSuffix(slot)); return 1; } printf("SLOT %s: Set as unbootable\n", impl->getSuffix(slot)); return 0; case 'h': default: usage(); return 0; } return 0; } qbootctl-0.1.2/ufs-bsg.cpp000066400000000000000000000124251431263540400154210ustar00rootroot00000000000000/* * Copyright (c) 2020 The Linux Foundation. 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. * * Neither the name of The Linux Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include "utils.h" #include "ufs-bsg.h" /* UFS BSG device node */ static char ufs_bsg_dev[FNAME_SZ] = "/dev/bsg/ufs-bsg0"; static int fd_ufs_bsg = 0; int ufs_bsg_dev_open() { if (fd_ufs_bsg) return 0; fd_ufs_bsg = open(ufs_bsg_dev, O_RDWR); if (fd_ufs_bsg < 0) { fprintf(stderr, "Unable to open '%s': %s\n", ufs_bsg_dev, strerror(errno)); fprintf(stderr, "Is CONFIG_SCSI_UFS_BSG is enabled in your kernel?\n"); fd_ufs_bsg = 0; return -1; } return 0; } void ufs_bsg_dev_close() { if (fd_ufs_bsg) { close(fd_ufs_bsg); fd_ufs_bsg = 0; } } static int ufs_bsg_ioctl(int fd, struct ufs_bsg_request *req, struct ufs_bsg_reply *rsp, __u8 *buf, __u32 buf_len, enum bsg_ioctl_dir dir) { int ret; struct sg_io_v4 sg_io { }; sg_io.guard = 'Q'; sg_io.protocol = BSG_PROTOCOL_SCSI; sg_io.subprotocol = BSG_SUB_PROTOCOL_SCSI_TRANSPORT; sg_io.request_len = sizeof(*req); sg_io.request = (__u64)req; sg_io.response = (__u64)rsp; sg_io.max_response_len = sizeof(*rsp); if (dir == BSG_IOCTL_DIR_FROM_DEV) { sg_io.din_xfer_len = buf_len; sg_io.din_xferp = (__u64)(buf); } else { sg_io.dout_xfer_len = buf_len; sg_io.dout_xferp = (__u64)(buf); } ret = ioctl(fd, SG_IO, &sg_io); if (ret) fprintf(stderr, "%s: Error from sg_io ioctl (return value: %d, error no: %d, reply result from LLD: %d\n)", __func__, ret, errno, rsp->result); if (sg_io.info || 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, sg_io.driver_status, rsp->result); ret = -EAGAIN; } return ret; } static void compose_ufs_bsg_query_req(struct ufs_bsg_request *req, __u8 func, __u8 opcode, __u8 idn, __u8 index, __u8 sel, __u16 length) { struct utp_upiu_header *hdr = &req->upiu_req.header; struct utp_upiu_query *qr = &req->upiu_req.qr; req->msgcode = UTP_UPIU_QUERY_REQ; hdr->dword_0 = DWORD(UTP_UPIU_QUERY_REQ, 0, 0, 0); hdr->dword_1 = DWORD(0, func, 0, 0); hdr->dword_2 = DWORD(0, 0, length >> 8, (__u8)length); qr->opcode = opcode; qr->idn = idn; qr->index = index; qr->selector = sel; qr->length = htobe16(length); } static int ufs_query_attr(int fd, __u32 value, __u8 func, __u8 opcode, __u8 idn, __u8 index, __u8 sel) { struct ufs_bsg_request req { }; struct ufs_bsg_reply rsp { }; 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) dir = BSG_IOCTL_DIR_TO_DEV; req.upiu_req.qr.value = htobe32(value); compose_ufs_bsg_query_req(&req, func, opcode, idn, index, sel, 0); ret = ufs_bsg_ioctl(fd, &req, &rsp, 0, 0, dir); if (ret) fprintf(stderr, "%s: Error from ufs_bsg_ioctl (return value: %d, error no: %d\n)", __func__, ret, errno); return ret; } int32_t set_boot_lun(__u8 lun_id) { int32_t ret; __u32 boot_lun_id = lun_id; LOGD("Using UFS bsg device: %s\n", ufs_bsg_dev); ret = ufs_bsg_dev_open(); if (ret) return ret; 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, QUERY_REQ_OP_WRITE_ATTR, QUERY_ATTR_IDN_BOOT_LU_EN, 0, 0); if (ret) { fprintf(stderr, "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: ufs_bsg_dev_close(); return ret; } qbootctl-0.1.2/ufs-bsg.h000066400000000000000000000055221431263540400150660ustar00rootroot00000000000000#ifndef __RECOVERY_UFS_BSG_H__ #define __RECOVERY_UFS_BSG_H__ /* * Copyright (c) 2020 The Linux Foundation. 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. * * Neither the name of The Linux Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT * 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. */ #define FNAME_SZ 64 #define SG_IO 0x2285 #define DWORD(b3, b2, b1, b0) htobe32((b3 << 24) | (b2 << 16) | (b1 << 8) | b0) /* UPIU Transaction Codes */ enum { UTP_UPIU_NOP_OUT = 0x00, UTP_UPIU_COMMAND = 0x01, UTP_UPIU_DATA_OUT = 0x02, UTP_UPIU_TASK_REQ = 0x04, UTP_UPIU_QUERY_REQ = 0x16, }; /* UPIU Query Function field */ enum { QUERY_REQ_FUNC_STD_READ = 0x01, QUERY_REQ_FUNC_STD_WRITE = 0x81, }; enum query_req_opcode { QUERY_REQ_OP_READ_DESC = 0x1, QUERY_REQ_OP_WRITE_DESC = 0x2, QUERY_REQ_OP_READ_ATTR = 0x3, QUERY_REQ_OP_WRITE_ATTR = 0x4, QUERY_REQ_OP_READ_FLAG = 0x5, QUERY_REQ_OP_SET_FLAG = 0x6, QUERY_REQ_OP_CLEAR_FLAG = 0x7, QUERY_REQ_OP_TOGGLE_FLAG = 0x8, }; enum query_desc_idn { QUERY_DESC_IDN_DEVICE = 0x0, QUERY_DESC_IDN_UNIT = 0x2, QUERY_DESC_IDN_GEOMETRY = 0x7, }; enum query_desc_size { QUERY_DESC_SIZE_DEVICE = 0x40, QUERY_DESC_SIZE_GEOMETRY = 0x48, QUERY_DESC_SIZE_UNIT = 0x23, }; enum bsg_ioctl_dir { BSG_IOCTL_DIR_TO_DEV, BSG_IOCTL_DIR_FROM_DEV, }; enum query_attr_idn { QUERY_ATTR_IDN_BOOT_LU_EN = 0x00, QUERY_ATTR_IDN_RESERVED = 0x01, QUERY_ATTR_IDN_POWER_MODE = 0x02, QUERY_ATTR_IDN_ACTIVE_ICC_LVL = 0x03, }; int ufs_bsg_dev_open(); #endif /* __RECOVERY_UFS_BSG_H__ */ qbootctl-0.1.2/utils.h000066400000000000000000000002771431263540400146620ustar00rootroot00000000000000#ifndef __UTILS_H__ #define __UTILS_H__ // Enable debug logging //#define DEBUG 1 #ifdef DEBUG #define LOGD(fmt, ...) printf(fmt, ##__VA_ARGS__) #else #define LOGD(fmtn, ...) #endif #endif