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-rw-r--r--mmcutils/mmcutils.c650
1 files changed, 650 insertions, 0 deletions
diff --git a/mmcutils/mmcutils.c b/mmcutils/mmcutils.c
new file mode 100644
index 000000000..f9c7b702a
--- /dev/null
+++ b/mmcutils/mmcutils.c
@@ -0,0 +1,650 @@
+/*
+ * Copyright (c) 2010, Code Aurora Forum. 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 Code Aurora Forum, Inc. 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 <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/reboot.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/mount.h> // for _IOW, _IOR, mount()
+
+#include "mmcutils.h"
+
+unsigned ext3_count = 0;
+char *ext3_partitions[] = {"system", "userdata", "cache", "NONE"};
+
+unsigned vfat_count = 0;
+char *vfat_partitions[] = {"modem", "NONE"};
+
+struct MmcPartition {
+ char *device_index;
+ char *filesystem;
+ char *name;
+ unsigned dstatus;
+ unsigned dtype ;
+ unsigned dfirstsec;
+ unsigned dsize;
+};
+
+typedef struct {
+ MmcPartition *partitions;
+ int partitions_allocd;
+ int partition_count;
+} MmcState;
+
+static MmcState g_mmc_state = {
+ NULL, // partitions
+ 0, // partitions_allocd
+ -1 // partition_count
+};
+
+#define MMC_DEVICENAME "/dev/block/mmcblk0"
+
+static void
+mmc_partition_name (MmcPartition *mbr, unsigned int type) {
+ switch(type)
+ {
+ char name[64];
+ case MMC_BOOT_TYPE:
+ sprintf(name,"boot");
+ mbr->name = strdup(name);
+ break;
+ case MMC_RECOVERY_TYPE:
+ sprintf(name,"recovery");
+ mbr->name = strdup(name);
+ break;
+ case MMC_EXT3_TYPE:
+ if (strcmp("NONE", ext3_partitions[ext3_count])) {
+ strcpy((char *)name,(const char *)ext3_partitions[ext3_count]);
+ mbr->name = strdup(name);
+ ext3_count++;
+ }
+ mbr->filesystem = strdup("ext3");
+ break;
+ case MMC_VFAT_TYPE:
+ if (strcmp("NONE", vfat_partitions[vfat_count])) {
+ strcpy((char *)name,(const char *)vfat_partitions[vfat_count]);
+ mbr->name = strdup(name);
+ vfat_count++;
+ }
+ mbr->filesystem = strdup("vfat");
+ break;
+ };
+}
+
+static int
+mmc_read_mbr (const char *device, MmcPartition *mbr) {
+ FILE *fd;
+ unsigned char buffer[512];
+ int idx, i;
+ unsigned mmc_partition_count = 0;
+ unsigned int dtype;
+ unsigned int dfirstsec;
+ unsigned int EBR_first_sec;
+ unsigned int EBR_current_sec;
+ int ret = -1;
+
+ fd = fopen(device, "r");
+ if(fd == NULL)
+ {
+ printf("Can't open device: \"%s\"\n", device);
+ goto ERROR2;
+ }
+ if ((fread(buffer, 512, 1, fd)) != 1)
+ {
+ printf("Can't read device: \"%s\"\n", device);
+ goto ERROR1;
+ }
+ /* Check to see if signature exists */
+ if ((buffer[TABLE_SIGNATURE] != 0x55) || \
+ (buffer[TABLE_SIGNATURE + 1] != 0xAA))
+ {
+ printf("Incorrect mbr signatures!\n");
+ goto ERROR1;
+ }
+ idx = TABLE_ENTRY_0;
+ for (i = 0; i < 4; i++)
+ {
+ char device_index[128];
+
+ mbr[mmc_partition_count].dstatus = \
+ buffer[idx + i * TABLE_ENTRY_SIZE + OFFSET_STATUS];
+ mbr[mmc_partition_count].dtype = \
+ buffer[idx + i * TABLE_ENTRY_SIZE + OFFSET_TYPE];
+ mbr[mmc_partition_count].dfirstsec = \
+ GET_LWORD_FROM_BYTE(&buffer[idx + \
+ i * TABLE_ENTRY_SIZE + \
+ OFFSET_FIRST_SEC]);
+ mbr[mmc_partition_count].dsize = \
+ GET_LWORD_FROM_BYTE(&buffer[idx + \
+ i * TABLE_ENTRY_SIZE + \
+ OFFSET_SIZE]);
+ dtype = mbr[mmc_partition_count].dtype;
+ dfirstsec = mbr[mmc_partition_count].dfirstsec;
+ mmc_partition_name(&mbr[mmc_partition_count], \
+ mbr[mmc_partition_count].dtype);
+
+ sprintf(device_index, "%sp%d", device, (mmc_partition_count+1));
+ mbr[mmc_partition_count].device_index = strdup(device_index);
+
+ mmc_partition_count++;
+ if (mmc_partition_count == MAX_PARTITIONS)
+ goto SUCCESS;
+ }
+
+ /* See if the last partition is EBR, if not, parsing is done */
+ if (dtype != 0x05)
+ {
+ goto SUCCESS;
+ }
+
+ EBR_first_sec = dfirstsec;
+ EBR_current_sec = dfirstsec;
+
+ fseek (fd, (EBR_first_sec * 512), SEEK_SET);
+ if ((fread(buffer, 512, 1, fd)) != 1)
+ goto ERROR1;
+
+ /* Loop to parse the EBR */
+ for (i = 0;; i++)
+ {
+ char device_index[128];
+
+ if ((buffer[TABLE_SIGNATURE] != 0x55) || (buffer[TABLE_SIGNATURE + 1] != 0xAA))
+ {
+ break;
+ }
+ mbr[mmc_partition_count].dstatus = \
+ buffer[TABLE_ENTRY_0 + OFFSET_STATUS];
+ mbr[mmc_partition_count].dtype = \
+ buffer[TABLE_ENTRY_0 + OFFSET_TYPE];
+ mbr[mmc_partition_count].dfirstsec = \
+ GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_0 + \
+ OFFSET_FIRST_SEC]) + \
+ EBR_current_sec;
+ mbr[mmc_partition_count].dsize = \
+ GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_0 + \
+ OFFSET_SIZE]);
+ mmc_partition_name(&mbr[mmc_partition_count], \
+ mbr[mmc_partition_count].dtype);
+
+ sprintf(device_index, "%sp%d", device, (mmc_partition_count+1));
+ mbr[mmc_partition_count].device_index = strdup(device_index);
+
+ mmc_partition_count++;
+ if (mmc_partition_count == MAX_PARTITIONS)
+ goto SUCCESS;
+
+ dfirstsec = GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_1 + OFFSET_FIRST_SEC]);
+ if(dfirstsec == 0)
+ {
+ /* Getting to the end of the EBR tables */
+ break;
+ }
+ /* More EBR to follow - read in the next EBR sector */
+ fseek (fd, ((EBR_first_sec + dfirstsec) * 512), SEEK_SET);
+ if ((fread(buffer, 512, 1, fd)) != 1)
+ goto ERROR1;
+
+ EBR_current_sec = EBR_first_sec + dfirstsec;
+ }
+
+SUCCESS:
+ ret = mmc_partition_count;
+ERROR1:
+ fclose(fd);
+ERROR2:
+ return ret;
+}
+
+int
+mmc_scan_partitions() {
+ int i;
+ ssize_t nbytes;
+
+ if (g_mmc_state.partitions == NULL) {
+ const int nump = MAX_PARTITIONS;
+ MmcPartition *partitions = malloc(nump * sizeof(*partitions));
+ if (partitions == NULL) {
+ errno = ENOMEM;
+ return -1;
+ }
+ g_mmc_state.partitions = partitions;
+ g_mmc_state.partitions_allocd = nump;
+ memset(partitions, 0, nump * sizeof(*partitions));
+ }
+ g_mmc_state.partition_count = 0;
+ ext3_count = 0;
+ vfat_count = 0;
+
+ /* Initialize all of the entries to make things easier later.
+ * (Lets us handle sparsely-numbered partitions, which
+ * may not even be possible.)
+ */
+ for (i = 0; i < g_mmc_state.partitions_allocd; i++) {
+ MmcPartition *p = &g_mmc_state.partitions[i];
+ if (p->device_index != NULL) {
+ free(p->device_index);
+ p->device_index = NULL;
+ }
+ if (p->name != NULL) {
+ free(p->name);
+ p->name = NULL;
+ }
+ if (p->filesystem != NULL) {
+ free(p->filesystem);
+ p->filesystem = NULL;
+ }
+ }
+
+ g_mmc_state.partition_count = mmc_read_mbr(MMC_DEVICENAME, g_mmc_state.partitions);
+ if(g_mmc_state.partition_count == -1)
+ {
+ printf("Error in reading mbr!\n");
+ // keep "partitions" around so we can free the names on a rescan.
+ g_mmc_state.partition_count = -1;
+ }
+ return g_mmc_state.partition_count;
+}
+
+static const MmcPartition *
+mmc_find_partition_by_device_index(const char *device_index)
+{
+ if (g_mmc_state.partitions != NULL) {
+ int i;
+ for (i = 0; i < g_mmc_state.partitions_allocd; i++) {
+ MmcPartition *p = &g_mmc_state.partitions[i];
+ if (p->device_index !=NULL && p->name != NULL) {
+ if (strcmp(p->device_index, device_index) == 0) {
+ return p;
+ }
+ }
+ }
+ }
+ return NULL;
+}
+
+const MmcPartition *
+mmc_find_partition_by_name(const char *name)
+{
+ if (name[0] == '/') {
+ return mmc_find_partition_by_device_index(name);
+ }
+
+ if (g_mmc_state.partitions != NULL) {
+ int i;
+ for (i = 0; i < g_mmc_state.partitions_allocd; i++) {
+ MmcPartition *p = &g_mmc_state.partitions[i];
+ if (p->device_index !=NULL && p->name != NULL) {
+ if (strcmp(p->name, name) == 0) {
+ return p;
+ }
+ }
+ }
+ }
+ return NULL;
+}
+
+#define MKE2FS_BIN "/sbin/mke2fs"
+#define TUNE2FS_BIN "/sbin/tune2fs"
+#define E2FSCK_BIN "/sbin/e2fsck"
+
+int
+run_exec_process ( char **argv) {
+ pid_t pid;
+ int status;
+ pid = fork();
+ if (pid == 0) {
+ execv(argv[0], argv);
+ fprintf(stderr, "E:Can't run (%s)\n",strerror(errno));
+ _exit(-1);
+ }
+
+ waitpid(pid, &status, 0);
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+ return 1;
+ }
+ return 0;
+}
+
+int
+format_ext3_device (const char *device) {
+ char *const mke2fs[] = {MKE2FS_BIN, "-j", "-q", device, NULL};
+ char *const tune2fs[] = {TUNE2FS_BIN, "-C", "1", device, NULL};
+ // Run mke2fs
+ if(run_exec_process(mke2fs)) {
+ printf("failure while running mke2fs\n");
+ return -1;
+ }
+
+ // Run tune2fs
+ if(run_exec_process(tune2fs)) {
+ printf("failure while running mke2fs\n");
+ return -1;
+ }
+
+ // Run e2fsck
+ char *const e2fsck[] = {E2FSCK_BIN, "-fy", device, NULL};
+ if(run_exec_process(e2fsck)) {
+ printf("failure while running e2fsck\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+format_ext2_device (const char *device) {
+ // Run mke2fs
+ char *const mke2fs[] = {MKE2FS_BIN, device, NULL};
+ if(run_exec_process(mke2fs))
+ return -1;
+
+ // Run tune2fs
+ char *const tune2fs[] = {TUNE2FS_BIN, "-C", "1", device, NULL};
+ if(run_exec_process(tune2fs))
+ return -1;
+
+ // Run e2fsck
+ char *const e2fsck[] = {E2FSCK_BIN, "-fy", device, NULL};
+ if(run_exec_process(e2fsck))
+ return -1;
+
+ return 0;
+}
+
+int
+mmc_format_ext3 (MmcPartition *partition) {
+ char device[128];
+ strcpy(device, partition->device_index);
+ return format_ext3_device(device);
+}
+
+int
+mmc_mount_partition(const MmcPartition *partition, const char *mount_point,
+ int read_only)
+{
+ const unsigned long flags = MS_NOATIME | MS_NODEV | MS_NODIRATIME;
+ char devname[128];
+ int rv = -1;
+ strcpy(devname, partition->device_index);
+ if (partition->filesystem == NULL) {
+ printf("Null filesystem!\n");
+ return rv;
+ }
+ if (!read_only) {
+ rv = mount(devname, mount_point, partition->filesystem, flags, NULL);
+ }
+ if (read_only || rv < 0) {
+ rv = mount(devname, mount_point, partition->filesystem, flags | MS_RDONLY, 0);
+ if (rv < 0) {
+ printf("Failed to mount %s on %s: %s\n",
+ devname, mount_point, strerror(errno));
+ } else {
+ printf("Mount %s on %s read-only\n", devname, mount_point);
+ }
+ }
+ return rv;
+}
+
+int
+mmc_raw_copy (const MmcPartition *partition, char *in_file) {
+ int ch;
+ FILE *in;
+ FILE *out;
+ int val = 0;
+ char buf[512];
+ unsigned sz = 0;
+ unsigned i;
+ int ret = -1;
+ char *out_file = partition->device_index;
+
+ in = fopen ( in_file, "r" );
+ if (in == NULL)
+ goto ERROR3;
+
+ out = fopen ( out_file, "w" );
+ if (out == NULL)
+ goto ERROR2;
+
+ fseek(in, 0L, SEEK_END);
+ sz = ftell(in);
+ fseek(in, 0L, SEEK_SET);
+
+ if (sz % 512)
+ {
+ while ( ( ch = fgetc ( in ) ) != EOF )
+ fputc ( ch, out );
+ }
+ else
+ {
+ for (i=0; i< (sz/512); i++)
+ {
+ if ((fread(buf, 512, 1, in)) != 1)
+ goto ERROR1;
+ if ((fwrite(buf, 512, 1, out)) != 1)
+ goto ERROR1;
+ }
+ }
+
+ fsync(out);
+ ret = 0;
+ERROR1:
+ fclose ( out );
+ERROR2:
+ fclose ( in );
+ERROR3:
+ return ret;
+
+}
+
+
+int
+mmc_raw_dump_internal (const char* in_file, const char *out_file) {
+ int ch;
+ FILE *in;
+ FILE *out;
+ int val = 0;
+ char buf[512];
+ unsigned sz = 0;
+ unsigned i;
+ int ret = -1;
+
+ in = fopen ( in_file, "r" );
+ if (in == NULL)
+ goto ERROR3;
+
+ out = fopen ( out_file, "w" );
+ if (out == NULL)
+ goto ERROR2;
+
+ fseek(in, 0L, SEEK_END);
+ sz = ftell(in);
+ fseek(in, 0L, SEEK_SET);
+
+ if (sz % 512)
+ {
+ while ( ( ch = fgetc ( in ) ) != EOF )
+ fputc ( ch, out );
+ }
+ else
+ {
+ for (i=0; i< (sz/512); i++)
+ {
+ if ((fread(buf, 512, 1, in)) != 1)
+ goto ERROR1;
+ if ((fwrite(buf, 512, 1, out)) != 1)
+ goto ERROR1;
+ }
+ }
+
+ fsync(out);
+ ret = 0;
+ERROR1:
+ fclose ( out );
+ERROR2:
+ fclose ( in );
+ERROR3:
+ return ret;
+
+}
+
+// TODO: refactor this to not be a giant copy paste mess
+int
+mmc_raw_dump (const MmcPartition *partition, char *out_file) {
+ return mmc_raw_dump_internal(partition->device_index, out_file);
+}
+
+
+int
+mmc_raw_read (const MmcPartition *partition, char *data, int data_size) {
+ int ch;
+ FILE *in;
+ int val = 0;
+ char buf[512];
+ unsigned sz = 0;
+ unsigned i;
+ int ret = -1;
+ char *in_file = partition->device_index;
+
+ in = fopen ( in_file, "r" );
+ if (in == NULL)
+ goto ERROR3;
+
+ fseek(in, 0L, SEEK_END);
+ sz = ftell(in);
+ fseek(in, 0L, SEEK_SET);
+
+ fread(data, data_size, 1, in);
+
+ ret = 0;
+ERROR1:
+ERROR2:
+ fclose ( in );
+ERROR3:
+ return ret;
+
+}
+
+int
+mmc_raw_write (const MmcPartition *partition, char *data, int data_size) {
+ int ch;
+ FILE *out;
+ int val = 0;
+ char buf[512];
+ unsigned sz = 0;
+ unsigned i;
+ int ret = -1;
+ char *out_file = partition->device_index;
+
+ out = fopen ( out_file, "w" );
+ if (out == NULL)
+ goto ERROR3;
+
+ fwrite(data, data_size, 1, out);
+
+ ret = 0;
+ERROR1:
+ERROR2:
+ fclose ( out );
+ERROR3:
+ return ret;
+
+}
+
+int cmd_mmc_restore_raw_partition(const char *partition, const char *filename)
+{
+ if (partition[0] != '/') {
+ mmc_scan_partitions();
+ const MmcPartition *p;
+ p = mmc_find_partition_by_name(partition);
+ if (p == NULL)
+ return -1;
+ return mmc_raw_copy(p, filename);
+ }
+ else {
+ return mmc_raw_dump_internal(filename, partition);
+ }
+}
+
+int cmd_mmc_backup_raw_partition(const char *partition, const char *filename)
+{
+ if (partition[0] != '/') {
+ mmc_scan_partitions();
+ const MmcPartition *p;
+ p = mmc_find_partition_by_name(partition);
+ if (p == NULL)
+ return -1;
+ return mmc_raw_dump(p, filename);
+ }
+ else {
+ return mmc_raw_dump_internal(partition, filename);
+ }
+}
+
+int cmd_mmc_erase_raw_partition(const char *partition)
+{
+ return 0;
+}
+
+int cmd_mmc_erase_partition(const char *partition, const char *filesystem)
+{
+ mmc_scan_partitions();
+ const MmcPartition *p;
+ p = mmc_find_partition_by_name(partition);
+ if (p == NULL)
+ return -1;
+ return mmc_format_ext3 (p);
+}
+
+int cmd_mmc_mount_partition(const char *partition, const char *mount_point, const char *filesystem, int read_only)
+{
+ mmc_scan_partitions();
+ const MmcPartition *p;
+ p = mmc_find_partition_by_name(partition);
+ if (p == NULL)
+ return -1;
+ return mmc_mount_partition(p, mount_point, read_only);
+}
+
+int cmd_mmc_get_partition_device(const char *partition, char *device)
+{
+ mmc_scan_partitions();
+ const MmcPartition *p;
+ p = mmc_find_partition_by_name(partition);
+ if (p == NULL)
+ return -1;
+ strcpy(device, p->device_index);
+ return 0;
+}
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