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Diffstat (limited to 'ubi-utils/src/libpfiflash.c')
-rw-r--r--ubi-utils/src/libpfiflash.c242
1 files changed, 217 insertions, 25 deletions
diff --git a/ubi-utils/src/libpfiflash.c b/ubi-utils/src/libpfiflash.c
index 4f1f5cd..e60290a 100644
--- a/ubi-utils/src/libpfiflash.c
+++ b/ubi-utils/src/libpfiflash.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) International Business Machines Corp., 2006
+ * Copyright International Business Machines Corp., 2006, 2007
*
* 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
@@ -55,8 +55,10 @@
#define __unused __attribute__((unused))
+#define COMPARE_BUFFER_SIZE 2048
+
static const char copyright [] __unused =
- "Copyright (c) International Business Machines Corp., 2006";
+ "Copyright International Business Machines Corp., 2006, 2007";
/* simply clear buffer, then write into front of it */
#define EBUF(fmt...) \
@@ -82,6 +84,7 @@ static pdd_func_t pdd_funcs[PDD_HANDLING_NUM] =
typedef enum ubi_update_process_t {
UBI_REMOVE = 0,
UBI_WRITE,
+ UBI_COMPARE,
} ubi_update_process_t;
@@ -556,6 +559,170 @@ write_normal_volume(int devno, uint32_t id, size_t update_size, FILE* fp_in,
return rc;
}
+static int compare_bootenv(FILE *fp_pfi, FILE **fp_flash, uint32_t ids_size,
+ uint32_t data_size, pdd_func_t pdd_f, char *err_buf,
+ size_t err_buf_size)
+{
+ int rc, warnings = 0;
+ unsigned int i;
+ bootenv_t bootenv_pfi, bootenv_res = NULL, bootenv_flash = NULL;
+
+ rc = bootenv_create(&bootenv_pfi);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_BOOTENV_CREATE;
+ goto err;
+ }
+
+ rc = bootenv_create(&bootenv_res);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_BOOTENV_CREATE;
+ goto err;
+ }
+
+ rc = bootenv_read(fp_pfi, bootenv_pfi, data_size);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_BOOTENV_READ;
+ goto err;
+ }
+
+ for (i = 0; i < ids_size; i++) {
+ rc = bootenv_create(&bootenv_flash);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_BOOTENV_CREATE;
+ goto err;
+ }
+
+ rc = bootenv_read(fp_flash[i], bootenv_flash, BOOTENV_MAXSIZE);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_BOOTENV_READ;
+ goto err;
+ }
+
+ rc = pdd_f(bootenv_flash, bootenv_pfi, &bootenv_res,
+ &warnings, err_buf, err_buf_size);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_PDD_UNKNOWN;
+ goto err;
+ }
+
+ rc = bootenv_compare(bootenv_flash, bootenv_res);
+ if (rc > 0) {
+ rc = -PFIFLASH_CMP_DIFF;
+ goto err;
+ } else if (rc < 0) {
+ rc = -PFIFLASH_ERR_COMPARE;
+ goto err;
+ }
+
+ bootenv_destroy(&bootenv_flash);
+ bootenv_flash = NULL;
+ }
+
+err:
+ if (bootenv_pfi)
+ bootenv_destroy(&bootenv_pfi);
+ if (bootenv_res)
+ bootenv_destroy(&bootenv_res);
+ if (bootenv_flash)
+ bootenv_destroy(&bootenv_flash);
+
+ return rc;
+}
+
+static int compare_data(FILE *fp_pfi, FILE **fp_flash, uint32_t ids_size,
+ uint32_t bytes_left)
+{
+ unsigned int i;
+ size_t read_bytes, rc = 0;
+ char buf_pfi[COMPARE_BUFFER_SIZE];
+ char *buf_flash[ids_size];
+
+ for (i = 0; i < ids_size; i++) {
+ buf_flash[i] = malloc(COMPARE_BUFFER_SIZE);
+ if (!buf_flash[i])
+ return -PFIFLASH_ERR_COMPARE;
+ }
+
+ while (bytes_left) {
+ if (bytes_left > COMPARE_BUFFER_SIZE)
+ read_bytes = COMPARE_BUFFER_SIZE;
+ else
+ read_bytes = bytes_left;
+
+ rc = fread(buf_pfi, 1, read_bytes, fp_pfi);
+ if (rc != read_bytes) {
+ rc = -PFIFLASH_ERR_COMPARE;
+ goto err;
+ }
+
+ for (i = 0; i < ids_size; i++) {
+ rc = fread(buf_flash[i], 1, read_bytes, fp_flash[i]);
+ if (rc != read_bytes) {
+ rc = -PFIFLASH_CMP_DIFF;
+ goto err;
+ }
+
+ rc = memcmp(buf_pfi, buf_flash[i], read_bytes);
+ if (rc != 0) {
+ rc = -PFIFLASH_CMP_DIFF;
+ goto err;
+ }
+ }
+
+ bytes_left -= read_bytes;
+ }
+
+err:
+ for (i = 0; i < ids_size; i++)
+ free(buf_flash[i]);
+
+ return rc;
+}
+
+static int compare_volumes(int devno, pfi_ubi_t u, FILE *fp_pfi,
+ pdd_func_t pdd_f, char *err_buf, size_t err_buf_size)
+{
+ int rc, is_bootenv = 0;
+ unsigned int i;
+ ubi_lib_t ulib = NULL;
+ FILE *fp_flash[u->ids_size];
+
+ rc = ubi_open(&ulib);
+ if (rc != 0) {
+ rc = -PFIFLASH_ERR_UBI_OPEN;
+ goto err;
+ }
+
+ for (i = 0; i < u->ids_size; i++) {
+ if (u->ids[i] == EXAMPLE_BOOTENV_VOL_ID_1 ||
+ u->ids[i] == EXAMPLE_BOOTENV_VOL_ID_2)
+ is_bootenv = 1;
+
+ fp_flash[i] = ubi_vol_fopen_read(ulib, devno, u->ids[i]);
+ if (fp_flash[i] == NULL) {
+ rc = -PFIFLASH_ERR_UBI_OPEN;
+ goto err;
+ }
+ }
+
+ if (is_bootenv)
+ rc = compare_bootenv(fp_pfi, fp_flash, u->ids_size,
+ u->data_size, pdd_f, err_buf, err_buf_size);
+ else
+ rc = compare_data(fp_pfi, fp_flash, u->ids_size, u->data_size);
+
+err:
+ if (rc < 0)
+ EBUF(PFIFLASH_ERRSTR[-rc]);
+
+ for (i = 0; i < u->ids_size; i++)
+ fclose(fp_flash[i]);
+ if (ulib)
+ ubi_close(&ulib);
+
+ return rc;
+}
+
static int
erase_mtd_region(FILE* file_p, int start, int length)
{
@@ -865,6 +1032,15 @@ process_ubi_volumes(FILE* pfi, int seqnum, list_t pfi_ubis,
goto err;
break;
+ case UBI_COMPARE:
+ rc = compare_volumes(EXAMPLE_UBI_DEVICE, u, pfi, pdd_f,
+ err_buf, err_buf_size);
+ if (rc != 0) {
+ EBUF_PREPEND("compare volume");
+ goto err;
+ }
+
+ break;
default:
rc = -PFIFLASH_ERR_UBI_UNKNOWN;
EBUF(PFIFLASH_ERRSTR[-rc]);
@@ -949,10 +1125,11 @@ mirror_ubi_volumes(uint32_t devno, list_t pfi_ubis,
/**
- * pfiflash_with_raw - exposed func to flash memory with a PFI file
+ * pfiflash_with_options - exposed func to flash memory with a PFI file
* @pfi PFI data file pointer
* @complete flag to erase unmapped volumes
* @seqnum sequence number
+ * @compare flag to compare
* @pdd_handling method to handle pdd (keep, merge, overwrite...)
*
* Error handling:
@@ -967,7 +1144,7 @@ mirror_ubi_volumes(uint32_t devno, list_t pfi_ubis,
* - passes rc, prepends err_buf with contextual aid
**/
int
-pfiflash_with_raw(FILE* pfi, int complete, int seqnum,
+pfiflash_with_options(FILE* pfi, int complete, int seqnum, int compare,
pdd_handling_t pdd_handling, const char* rawdev,
char *err_buf, size_t err_buf_size)
{
@@ -1001,7 +1178,7 @@ pfiflash_with_raw(FILE* pfi, int complete, int seqnum,
goto err;
}
- if (rawdev == NULL)
+ if (rawdev == NULL || compare)
rc = skip_raw_volumes(pfi, pfi_raws, err_buf, err_buf_size);
else
rc = process_raw_volumes(pfi, pfi_raws, rawdev, err_buf,
@@ -1011,7 +1188,7 @@ pfiflash_with_raw(FILE* pfi, int complete, int seqnum,
goto err;
}
- if (complete) {
+ if (complete && !compare) {
rc = erase_unmapped_ubi_volumes(EXAMPLE_UBI_DEVICE, pfi_ubis,
err_buf, err_buf_size);
if (rc != 0) {
@@ -1029,25 +1206,40 @@ pfiflash_with_raw(FILE* pfi, int complete, int seqnum,
goto err;
}
- rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv, pdd_f,
- UBI_REMOVE, err_buf, err_buf_size);
- if (rc != 0) {
- EBUF_PREPEND("removing UBI volumes");
- goto err;
- }
+ if (!compare) {
+ rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv,
+ pdd_f, UBI_REMOVE, err_buf, err_buf_size);
+ if (rc != 0) {
+ EBUF_PREPEND("removing UBI volumes");
+ goto err;
+ }
- rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv, pdd_f,
- UBI_WRITE, err_buf, err_buf_size);
- if (rc != 0) {
- EBUF_PREPEND("writing UBI volumes");
- goto err;
- }
+ rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv,
+ pdd_f, UBI_WRITE, err_buf, err_buf_size);
+ if (rc != 0) {
+ EBUF_PREPEND("writing UBI volumes");
+ goto err;
+ }
- if (seqnum < 0) { /* mirror redundant pairs */
- rc = mirror_ubi_volumes(EXAMPLE_UBI_DEVICE, pfi_ubis,
+ if (seqnum < 0) { /* mirror redundant pairs */
+ rc = mirror_ubi_volumes(EXAMPLE_UBI_DEVICE, pfi_ubis,
err_buf, err_buf_size);
- if (rc != 0) {
- EBUF_PREPEND("mirroring UBI volumes");
+ if (rc != 0) {
+ EBUF_PREPEND("mirroring UBI volumes");
+ goto err;
+ }
+ }
+ } else {
+ /* only compare volumes, don't alter the content */
+ rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv,
+ pdd_f, UBI_COMPARE, err_buf, err_buf_size);
+
+ if (rc == -PFIFLASH_CMP_DIFF)
+ /* update is necessary, return positive value */
+ rc = 1;
+
+ if (rc < 0) {
+ EBUF_PREPEND("comparing UBI volumes");
goto err;
}
}
@@ -1061,7 +1253,7 @@ pfiflash_with_raw(FILE* pfi, int complete, int seqnum,
/**
- * pfiflash - passes to pfiflash_with_raw
+ * pfiflash - passes to pfiflash_with_options
* @pfi PFI data file pointer
* @complete flag to erase unmapped volumes
* @seqnum sequence number
@@ -1069,8 +1261,8 @@ pfiflash_with_raw(FILE* pfi, int complete, int seqnum,
**/
int
pfiflash(FILE* pfi, int complete, int seqnum, pdd_handling_t pdd_handling,
- char *err_buf, size_t err_buf_size)
+ char *err_buf, size_t err_buf_size)
{
- return pfiflash_with_raw(pfi, complete, seqnum, pdd_handling,
+ return pfiflash_with_options(pfi, complete, seqnum, 0, pdd_handling,
NULL, err_buf, err_buf_size);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 19:44:01 +0000