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-rw-r--r--mtdutils/bml_over_mtd.c798
1 files changed, 798 insertions, 0 deletions
diff --git a/mtdutils/bml_over_mtd.c b/mtdutils/bml_over_mtd.c
new file mode 100644
index 000000000..c40179281
--- /dev/null
+++ b/mtdutils/bml_over_mtd.c
@@ -0,0 +1,798 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <limits.h>
+
+#include "cutils/log.h"
+
+#include <mtd/mtd-user.h>
+
+#include "mtdutils.h"
+
+typedef struct BmlOverMtdReadContext {
+ const MtdPartition *partition;
+ char *buffer;
+ size_t consumed;
+ int fd;
+} BmlOverMtdReadContext;
+
+typedef struct BmlOverMtdWriteContext {
+ const MtdPartition *partition;
+ char *buffer;
+ size_t stored;
+ int fd;
+
+ off_t* bad_block_offsets;
+ int bad_block_alloc;
+ int bad_block_count;
+} BmlOverMtdWriteContext;
+
+
+static BmlOverMtdReadContext *bml_over_mtd_read_partition(const MtdPartition *partition)
+{
+ BmlOverMtdReadContext *ctx = (BmlOverMtdReadContext*) malloc(sizeof(BmlOverMtdReadContext));
+ if (ctx == NULL) return NULL;
+
+ ctx->buffer = malloc(partition->erase_size);
+ if (ctx->buffer == NULL) {
+ free(ctx);
+ return NULL;
+ }
+
+ char mtddevname[32];
+ sprintf(mtddevname, "/dev/mtd/mtd%d", partition->device_index);
+ ctx->fd = open(mtddevname, O_RDONLY);
+ if (ctx->fd < 0) {
+ free(ctx);
+ free(ctx->buffer);
+ return NULL;
+ }
+
+ ctx->partition = partition;
+ ctx->consumed = partition->erase_size;
+ return ctx;
+}
+
+static void bml_over_mtd_read_close(BmlOverMtdReadContext *ctx)
+{
+ close(ctx->fd);
+ free(ctx->buffer);
+ free(ctx);
+}
+
+static BmlOverMtdWriteContext *bml_over_mtd_write_partition(const MtdPartition *partition)
+{
+ BmlOverMtdWriteContext *ctx = (BmlOverMtdWriteContext*) malloc(sizeof(BmlOverMtdWriteContext));
+ if (ctx == NULL) return NULL;
+
+ ctx->bad_block_offsets = NULL;
+ ctx->bad_block_alloc = 0;
+ ctx->bad_block_count = 0;
+
+ ctx->buffer = malloc(partition->erase_size);
+ if (ctx->buffer == NULL) {
+ free(ctx);
+ return NULL;
+ }
+
+ char mtddevname[32];
+ sprintf(mtddevname, "/dev/mtd/mtd%d", partition->device_index);
+ ctx->fd = open(mtddevname, O_RDWR);
+ if (ctx->fd < 0) {
+ free(ctx->buffer);
+ free(ctx);
+ return NULL;
+ }
+
+ ctx->partition = partition;
+ ctx->stored = 0;
+ return ctx;
+}
+
+static int bml_over_mtd_write_close(BmlOverMtdWriteContext *ctx)
+{
+ int r = 0;
+ if (close(ctx->fd)) r = -1;
+ free(ctx->bad_block_offsets);
+ free(ctx->buffer);
+ free(ctx);
+ return r;
+}
+
+
+#ifdef LOG_TAG
+#undef LOG_TAG
+#endif
+
+#define LOG_TAG "bml_over_mtd"
+
+#define BLOCK_SIZE 2048
+#define SPARE_SIZE (BLOCK_SIZE >> 5)
+
+#define EXIT_CODE_BAD_BLOCKS 15
+
+static int die(const char *msg, ...) {
+ int err = errno;
+ va_list args;
+ va_start(args, msg);
+ char buf[1024];
+ vsnprintf(buf, sizeof(buf), msg, args);
+ va_end(args);
+
+ if (err != 0) {
+ strlcat(buf, ": ", sizeof(buf));
+ strlcat(buf, strerror(err), sizeof(buf));
+ }
+
+ fprintf(stderr, "%s\n", buf);
+ return 1;
+}
+
+static unsigned short* CreateEmptyBlockMapping(const MtdPartition* pSrcPart)
+{
+ size_t srcTotal, srcErase, srcWrite;
+ if (mtd_partition_info(pSrcPart, &srcTotal, &srcErase, &srcWrite) != 0)
+ {
+ fprintf(stderr, "Failed to access partition.\n");
+ return NULL;
+ }
+
+ int numSrcBlocks = srcTotal/srcErase;
+
+ unsigned short* pMapping = malloc(numSrcBlocks * sizeof(unsigned short));
+ if (pMapping == NULL)
+ {
+ fprintf(stderr, "Failed to allocate block mapping memory.\n");
+ return NULL;
+ }
+ memset(pMapping, 0xFF, numSrcBlocks * sizeof(unsigned short));
+ return pMapping;
+}
+
+static const unsigned short* CreateBlockMapping(const MtdPartition* pSrcPart, int srcPartStartBlock,
+ const MtdPartition *pReservoirPart, int reservoirPartStartBlock)
+{
+ size_t srcTotal, srcErase, srcWrite;
+ if (mtd_partition_info(pSrcPart, &srcTotal, &srcErase, &srcWrite) != 0)
+ {
+ fprintf(stderr, "Failed to access partition.\n");
+ return NULL;
+ }
+
+ int numSrcBlocks = srcTotal/srcErase;
+
+ unsigned short* pMapping = malloc(numSrcBlocks * sizeof(unsigned short));
+ if (pMapping == NULL)
+ {
+ fprintf(stderr, "Failed to allocate block mapping memory.\n");
+ return NULL;
+ }
+ memset(pMapping, 0xFF, numSrcBlocks * sizeof(unsigned short));
+
+ size_t total, erase, write;
+ if (mtd_partition_info(pReservoirPart, &total, &erase, &write) != 0)
+ {
+ fprintf(stderr, "Failed to access reservoir partition.\n");
+ free(pMapping);
+ return NULL;
+ }
+
+ if (erase != srcErase || write != srcWrite)
+ {
+ fprintf(stderr, "Source partition and reservoir partition differ in size properties.\n");
+ free(pMapping);
+ return NULL;
+ }
+
+ printf("Partition info: Total %d, Erase %d, write %d\n", total, erase, write);
+
+ BmlOverMtdReadContext *readctx = bml_over_mtd_read_partition(pReservoirPart);
+ if (readctx == NULL)
+ {
+ fprintf(stderr, "Failed to open reservoir partition for reading.\n");
+ free(pMapping);
+ return NULL;
+ }
+
+ if (total < erase || total > INT_MAX)
+ {
+ fprintf(stderr, "Unsuitable reservoir partition properties.\n");
+ free(pMapping);
+ bml_over_mtd_read_close(readctx);
+ return NULL;
+ }
+
+ int foundMappingTable = 0;
+
+ int currOffset = total; //Offset *behind* the last byte
+ while (currOffset > 0)
+ {
+ currOffset -= erase;
+ loff_t pos = lseek64(readctx->fd, currOffset, SEEK_SET);
+ int mgbb = ioctl(readctx->fd, MEMGETBADBLOCK, &pos);
+ if (mgbb != 0)
+ {
+ printf("Bad block %d in reservoir area, skipping.\n", currOffset/erase);
+ continue;
+ }
+ ssize_t readBytes = read(readctx->fd, readctx->buffer, erase);
+ if (readBytes != (ssize_t)erase)
+ {
+ fprintf(stderr, "Failed to read good block in reservoir area (%s).\n",
+ strerror(errno));
+ free(pMapping);
+ bml_over_mtd_read_close(readctx);
+ return NULL;
+ }
+ if (readBytes >= 0x2000)
+ {
+ char* buf = readctx->buffer;
+ if (buf[0]=='U' && buf[1]=='P' && buf[2]=='C' && buf[3]=='H')
+ {
+ printf ("Found mapping block mark at 0x%x (block %d).\n", currOffset, currOffset/erase);
+
+ unsigned short* mappings = (unsigned short*) &buf[0x1000];
+ if (mappings[0]==0 && mappings[1]==0xffff)
+ {
+ printf("Found start of mapping table.\n");
+ foundMappingTable = 1;
+ //Skip first entry (dummy)
+ unsigned short* mappingEntry = mappings + 2;
+ while (mappingEntry - mappings < 100
+ && mappingEntry[0] != 0xffff)
+ {
+ unsigned short rawSrcBlk = mappingEntry[0];
+ unsigned short rawDstBlk = mappingEntry[1];
+
+ printf("Found raw block mapping %d -> %d\n", rawSrcBlk,
+ rawDstBlk);
+
+ unsigned int srcAbsoluteStartAddress = srcPartStartBlock * erase;
+ unsigned int resAbsoluteStartAddress = reservoirPartStartBlock * erase;
+
+ int reservoirLastBlock = reservoirPartStartBlock + numSrcBlocks - 1;
+ if (rawDstBlk < reservoirPartStartBlock
+ || rawDstBlk*erase >= resAbsoluteStartAddress+currOffset)
+ {
+ fprintf(stderr, "Mapped block not within reasonable reservoir area.\n");
+ foundMappingTable = 0;
+ break;
+ }
+
+ int srcLastBlock = srcPartStartBlock + numSrcBlocks - 1;
+ if (rawSrcBlk >= srcPartStartBlock && rawSrcBlk <= srcLastBlock)
+ {
+
+ unsigned short relSrcBlk = rawSrcBlk - srcPartStartBlock;
+ unsigned short relDstBlk = rawDstBlk - reservoirPartStartBlock;
+ printf("Partition relative block mapping %d -> %d\n",relSrcBlk, relDstBlk);
+
+ printf("Absolute mapped start addresses 0x%x -> 0x%x\n",
+ srcAbsoluteStartAddress+relSrcBlk*erase,
+ resAbsoluteStartAddress+relDstBlk*erase);
+ printf("Partition relative mapped start addresses 0x%x -> 0x%x\n",
+ relSrcBlk*erase, relDstBlk*erase);
+
+ //Set mapping entry. For duplicate entries, later entries replace former ones.
+ //*Assumption*: Bad blocks in reservoir area will not be mapped themselves in
+ //the mapping table. User partition blocks will not be mapped to bad blocks
+ //(only) in the reservoir area. This has to be confirmed on a wider range of
+ //devices.
+ pMapping[relSrcBlk] = relDstBlk;
+
+ }
+ mappingEntry+=2;
+ }
+ break; //We found the mapping table, no need to search further
+ }
+
+
+ }
+ }
+
+ }
+ bml_over_mtd_read_close(readctx);
+
+ if (foundMappingTable == 0)
+ {
+ fprintf(stderr, "Cannot find mapping table in reservoir partition.\n");
+ free(pMapping);
+ return NULL;
+ }
+
+ //Consistency and validity check
+ int mappingValid = 1;
+ readctx = bml_over_mtd_read_partition(pSrcPart);
+ if (readctx == NULL)
+ {
+ fprintf(stderr, "Cannot open source partition for reading.\n");
+ free(pMapping);
+ return NULL;
+ }
+ int currBlock = 0;
+ for (;currBlock < numSrcBlocks; ++currBlock)
+ {
+ loff_t pos = lseek64(readctx->fd, currBlock*erase, SEEK_SET);
+ int mgbb = ioctl(readctx->fd, MEMGETBADBLOCK, &pos);
+ if (mgbb == 0)
+ {
+ if (pMapping[currBlock]!=0xffff)
+ {
+ fprintf(stderr, "Consistency error: Good block has mapping entry %d -> %d\n", currBlock, pMapping[currBlock]);
+ mappingValid = 0;
+ }
+ } else
+ {
+ //Bad block!
+ if (pMapping[currBlock]==0xffff)
+ {
+ fprintf(stderr, "Consistency error: Bad block has no mapping entry \n");
+ mappingValid = 0;
+ } else
+ {
+ BmlOverMtdReadContext* reservoirReadCtx = bml_over_mtd_read_partition(pReservoirPart);
+ if (reservoirReadCtx == 0)
+ {
+ fprintf(stderr, "Reservoir partition cannot be opened for reading in consistency check.\n");
+ mappingValid = 0;
+ } else
+ {
+ pos = lseek64(reservoirReadCtx->fd, pMapping[currBlock]*erase, SEEK_SET);
+ mgbb = ioctl(reservoirReadCtx->fd, MEMGETBADBLOCK, &pos);
+ if (mgbb == 0)
+ {
+ printf("Bad block has properly mapped reservoir block %d -> %d\n",currBlock, pMapping[currBlock]);
+ }
+ else
+ {
+ fprintf(stderr, "Consistency error: Mapped block is bad, too. (%d -> %d)\n",currBlock, pMapping[currBlock]);
+ mappingValid = 0;
+ }
+
+ }
+ bml_over_mtd_read_close(reservoirReadCtx);
+ }
+
+ }
+
+ }
+ bml_over_mtd_read_close(readctx);
+
+
+ if (!mappingValid)
+ {
+ free(pMapping);
+ return NULL;
+ }
+
+ return pMapping;
+}
+
+static void ReleaseBlockMapping(const unsigned short* blockMapping)
+{
+ free((void*)blockMapping);
+}
+
+static int dump_bml_partition(const MtdPartition* pSrcPart, const MtdPartition* pReservoirPart,
+ const unsigned short* blockMapping, const char* filename)
+{
+ int fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0666);
+ if (fd < 0)
+ {
+ fprintf(stderr, "error opening %s", filename);
+ return -1;
+ }
+ BmlOverMtdReadContext* pSrcRead = bml_over_mtd_read_partition(pSrcPart);
+ if (pSrcRead == NULL)
+ {
+ close(fd);
+ fprintf(stderr, "dump_bml_partition: Error opening src part for reading.\n");
+ return -1;
+ }
+
+ BmlOverMtdReadContext* pResRead = bml_over_mtd_read_partition(pReservoirPart);
+ if (pResRead == NULL)
+ {
+ close(fd);
+ bml_over_mtd_read_close(pSrcRead);
+ fprintf(stderr, "dump_bml_partition: Error opening reservoir part for reading.\n");
+ return -1;
+ }
+
+
+ int numBlocks = pSrcPart->size / pSrcPart->erase_size;
+ int currblock = 0;
+ for (;currblock < numBlocks; ++currblock)
+ {
+ int srcFd = -1;
+ if (blockMapping[currblock] == 0xffff)
+ {
+ //Good block, use src partition
+ srcFd = pSrcRead->fd;
+ if (lseek64(pSrcRead->fd, currblock*pSrcPart->erase_size, SEEK_SET)==-1)
+ {
+ close(fd);
+ bml_over_mtd_read_close(pSrcRead);
+ bml_over_mtd_read_close(pResRead);
+ fprintf(stderr, "dump_bml_partition: lseek in src partition failed\n");
+ return -1;
+ }
+ } else
+ {
+ //Bad block, use mapped block in reservoir partition
+ srcFd = pResRead->fd;
+ if (lseek64(pResRead->fd, blockMapping[currblock]*pSrcPart->erase_size, SEEK_SET)==-1)
+ {
+ close(fd);
+ bml_over_mtd_read_close(pSrcRead);
+ bml_over_mtd_read_close(pResRead);
+ fprintf(stderr, "dump_bml_partition: lseek in reservoir partition failed\n");
+ return -1;
+ }
+ }
+ size_t blockBytesRead = 0;
+ while (blockBytesRead < pSrcPart->erase_size)
+ {
+ ssize_t len = read(srcFd, pSrcRead->buffer + blockBytesRead,
+ pSrcPart->erase_size - blockBytesRead);
+ if (len <= 0)
+ {
+ close(fd);
+ bml_over_mtd_read_close(pSrcRead);
+ bml_over_mtd_read_close(pResRead);
+ fprintf(stderr, "dump_bml_partition: reading partition failed\n");
+ return -1;
+ }
+ blockBytesRead += len;
+ }
+
+ size_t blockBytesWritten = 0;
+ while (blockBytesWritten < pSrcPart->erase_size)
+ {
+ ssize_t len = write(fd, pSrcRead->buffer + blockBytesWritten,
+ pSrcPart->erase_size - blockBytesWritten);
+ if (len <= 0)
+ {
+ close(fd);
+ bml_over_mtd_read_close(pSrcRead);
+ bml_over_mtd_read_close(pResRead);
+ fprintf(stderr, "dump_bml_partition: writing partition dump file failed\n");
+ return -1;
+ }
+ blockBytesWritten += len;
+ }
+
+ }
+
+ bml_over_mtd_read_close(pSrcRead);
+ bml_over_mtd_read_close(pResRead);
+
+ if (close(fd)) {
+ unlink(filename);
+ printf("error closing %s", filename);
+ return -1;
+ }
+
+ return 0;
+}
+
+static ssize_t bml_over_mtd_write_block(int fd, ssize_t erase_size, char* data)
+{
+ off_t pos = lseek(fd, 0, SEEK_CUR);
+ if (pos == (off_t) -1) return -1;
+
+ ssize_t size = erase_size;
+ loff_t bpos = pos;
+ int ret = ioctl(fd, MEMGETBADBLOCK, &bpos);
+ if (ret != 0 && !(ret == -1 && errno == EOPNOTSUPP)) {
+ fprintf(stderr,
+ "Mapping failure: Trying to write bad block at 0x%08lx (ret %d errno %d)\n",
+ pos, ret, errno);
+ return -1;
+ }
+
+ struct erase_info_user erase_info;
+ erase_info.start = pos;
+ erase_info.length = size;
+ int retry;
+ for (retry = 0; retry < 2; ++retry) {
+ if (ioctl(fd, MEMERASE, &erase_info) < 0) {
+ fprintf(stderr, "mtd: erase failure at 0x%08lx (%s)\n",
+ pos, strerror(errno));
+ continue;
+ }
+ if (lseek(fd, pos, SEEK_SET) != pos ||
+ write(fd, data, size) != size) {
+ fprintf(stderr, "mtd: write error at 0x%08lx (%s)\n",
+ pos, strerror(errno));
+ }
+
+ char verify[size];
+ if (lseek(fd, pos, SEEK_SET) != pos ||
+ read(fd, verify, size) != size) {
+ fprintf(stderr, "mtd: re-read error at 0x%08lx (%s)\n",
+ pos, strerror(errno));
+ continue;
+ }
+ if (memcmp(data, verify, size) != 0) {
+ fprintf(stderr, "mtd: verification error at 0x%08lx (%s)\n",
+ pos, strerror(errno));
+ continue;
+ }
+
+ if (retry > 0) {
+ fprintf(stderr, "mtd: wrote block after %d retries\n", retry);
+ }
+ fprintf(stderr, "mtd: successfully wrote block at %llx\n", pos);
+ return size; // Success!
+ }
+
+
+ fprintf(stderr, "mtd: Block at %llx could not be properly written.\n", pos);
+ // Ran out of space on the device
+ errno = ENOSPC;
+ return -1;
+}
+
+static int flash_bml_partition(const MtdPartition* pSrcPart, const MtdPartition* pReservoirPart,
+ const unsigned short* blockMapping, const char* filename)
+{
+ int fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ {
+ fprintf(stderr, "error opening %s", filename);
+ return -1;
+ }
+ BmlOverMtdWriteContext* pSrcWrite = bml_over_mtd_write_partition(pSrcPart);
+ if (pSrcWrite == NULL)
+ {
+ close(fd);
+ fprintf(stderr, "flash_bml_partition: Error opening src part for writing.\n");
+ return -1;
+ }
+
+#ifdef DUMMY_WRITING
+ close(pSrcWrite->fd);
+ pSrcWrite->fd = open("/sdcard/srcPartWriteDummy.bin", O_WRONLY|O_CREAT|O_TRUNC, 0666);
+#endif
+
+ BmlOverMtdWriteContext* pResWrite = bml_over_mtd_write_partition(pReservoirPart);
+ if (pResWrite == NULL)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ fprintf(stderr, "flash_bml_partition: Error opening reservoir part for writing.\n");
+ return -1;
+ }
+#ifdef DUMMY_WRITING
+ close(pResWrite->fd);
+ pResWrite->fd = open("/sdcard/resPartWriteDummy.bin", O_WRONLY|O_CREAT|O_TRUNC, 0666);
+#endif
+
+ struct stat fileStat;
+ if (fstat(fd, &fileStat) != 0)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+ fprintf(stderr, "flash_bml_partition: Failed to stat source file.\n");
+ return -1;
+
+ }
+ if (fileStat.st_size > pSrcPart->size)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+ fprintf(stderr, "flash_bml_partition: Source file too large for target partition.\n");
+ return -1;
+ }
+
+ int numBlocks = (fileStat.st_size + pSrcPart->erase_size - 1) / pSrcPart->erase_size;
+ int currblock;
+ for (currblock = 0 ;currblock < numBlocks; ++currblock)
+ {
+ memset(pSrcWrite->buffer, 0xFF, pSrcPart->erase_size);
+ size_t blockBytesRead = 0;
+ while (blockBytesRead < pSrcPart->erase_size)
+ {
+ ssize_t len = read(fd, pSrcWrite->buffer + blockBytesRead,
+ pSrcPart->erase_size - blockBytesRead);
+ if (len < 0)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+ fprintf(stderr, "flash_bml_partition: read source file failed\n");
+ return -1;
+ }
+ if (len == 0)
+ {
+ //End of file
+ break;
+ }
+
+ blockBytesRead += len;
+ }
+
+
+
+ int srcFd = -1;
+ if (blockMapping[currblock] == 0xffff)
+ {
+ //Good block, use src partition
+ srcFd = pSrcWrite->fd;
+ if (lseek64(pSrcWrite->fd, currblock*pSrcPart->erase_size, SEEK_SET)==-1)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+ fprintf(stderr, "flash_bml_partition: lseek in src partition failed\n");
+ return -1;
+ }
+ } else
+ {
+ //Bad block, use mapped block in reservoir partition
+ srcFd = pResWrite->fd;
+ if (lseek64(pResWrite->fd, blockMapping[currblock]*pSrcPart->erase_size, SEEK_SET)==-1)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+ fprintf(stderr, "flash_bml_partition: lseek in reservoir partition failed\n");
+ return -1;
+ }
+ }
+ size_t blockBytesWritten = 0;
+ while (blockBytesWritten < pSrcPart->erase_size)
+ {
+#ifdef DUMMY_WRITING
+ ssize_t len = write(srcFd, pSrcWrite->buffer + blockBytesWritten,
+ pSrcPart->erase_size - blockBytesWritten);
+#else
+ ssize_t len = bml_over_mtd_write_block(srcFd, pSrcPart->erase_size, pSrcWrite->buffer);
+#endif
+ if (len <= 0)
+ {
+ close(fd);
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+ fprintf(stderr, "flash_bml_partition: writing to partition failed\n");
+ return -1;
+ }
+ blockBytesWritten += len;
+ }
+
+
+ }
+
+ bml_over_mtd_write_close(pSrcWrite);
+ bml_over_mtd_write_close(pResWrite);
+
+ if (close(fd)) {
+ printf("error closing %s", filename);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int scan_partition(const MtdPartition* pPart)
+{
+ BmlOverMtdReadContext* readCtx = bml_over_mtd_read_partition(pPart);
+ if (readCtx == NULL)
+ {
+ fprintf(stderr, "Failed to open partition for reading.\n");
+ return -1;
+ }
+
+ int numBadBlocks = 0;
+ size_t numBlocks = pPart->size / pPart->erase_size;
+ size_t currBlock;
+ for (currBlock = 0; currBlock < numBlocks; ++currBlock)
+ {
+
+ loff_t pos = currBlock * pPart->erase_size;
+ int mgbb = ioctl(readCtx->fd, MEMGETBADBLOCK, &pos);
+ if (mgbb != 0)
+ {
+ printf("Bad block %d at 0x%x.\n", currBlock, (unsigned int)pos);
+ numBadBlocks++;
+ }
+ }
+
+ bml_over_mtd_read_close(readCtx);
+ if (numBadBlocks == 0)
+ {
+ printf("No bad blocks.\n");
+ return 0;
+ }
+ return -1 ;
+}
+
+int main(int argc, char **argv)
+{
+ if (argc != 7 && (argc != 3 || (argc == 3 && strcmp(argv[1],"scan"))!=0)
+ && (argc != 6 || (argc == 6 && strcmp(argv[1],"scan"))!=0))
+ return die("Usage: %s dump|flash <partition> <partition_start_block> <reservoirpartition> <reservoir_start_block> <file>\n"
+ "E.g. %s dump boot 72 reservoir 2004 file.bin\n"
+ "Usage: %s scan <partition> [<partition_start_block> <reservoirpartition> <reservoir_start_block>]\n"
+ ,argv[0], argv[0], argv[0]);
+ int num_partitions = mtd_scan_partitions();
+ const MtdPartition *pSrcPart = mtd_find_partition_by_name(argv[2]);
+ if (pSrcPart == NULL)
+ return die("Cannot find partition %s", argv[2]);
+
+ int scanResult = scan_partition(pSrcPart);
+
+ if (argc == 3 && strcmp(argv[1],"scan")==0)
+ {
+ return (scanResult == 0 ? 0 : EXIT_CODE_BAD_BLOCKS);
+ }
+
+ int retVal = 0;
+ const MtdPartition* pReservoirPart = mtd_find_partition_by_name(argv[4]);
+ if (pReservoirPart == NULL)
+ return die("Cannot find partition %s", argv[4]);
+
+ int srcPartStartBlock = atoi(argv[3]);
+ int reservoirPartStartBlock = atoi(argv[5]);
+ const unsigned short* pMapping = CreateBlockMapping(pSrcPart, srcPartStartBlock,
+ pReservoirPart, reservoirPartStartBlock);
+
+ if (pMapping == NULL && scanResult == 0)
+ {
+ printf("Generating empty block mapping table for error-free partition.\n");
+ pMapping = CreateEmptyBlockMapping(pSrcPart);
+ }
+
+ if (argc == 6 && strcmp(argv[1],"scan")==0)
+ {
+ retVal = (scanResult == 0 ? 0 : EXIT_CODE_BAD_BLOCKS);
+ }
+
+ if (pMapping == NULL)
+ return die("Failed to create block mapping table");
+
+ if (strcmp(argv[1],"dump")==0)
+ {
+ retVal = dump_bml_partition(pSrcPart, pReservoirPart, pMapping, argv[6]);
+ if (retVal == 0)
+ printf("Successfully dumped partition to %s\n", argv[6]);
+ }
+
+ if (strcmp(argv[1],"flash")==0)
+ {
+ retVal = flash_bml_partition(pSrcPart, pReservoirPart, pMapping, argv[6]);
+ if (retVal == 0)
+ printf("Successfully wrote %s to partition\n", argv[6]);
+
+ }
+
+
+ ReleaseBlockMapping(pMapping);
+ return retVal;
+}
+