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Diffstat (limited to 'ubi-utils/src/libpfiflash/pfiflash.c')
-rw-r--r--ubi-utils/src/libpfiflash/pfiflash.c617
1 files changed, 617 insertions, 0 deletions
diff --git a/ubi-utils/src/libpfiflash/pfiflash.c b/ubi-utils/src/libpfiflash/pfiflash.c
new file mode 100644
index 0000000..0859a22
--- /dev/null
+++ b/ubi-utils/src/libpfiflash/pfiflash.c
@@ -0,0 +1,617 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/**
+ * @file pfiflash.c
+ *
+ * @author Oliver Lohmann <oliloh@de.ibm.com>
+ *
+ * @brief This library is provides an interface to the pfiflash utility.
+ *
+ * <oliloh@de.ibm.com> Wed Mar 15 11:39:19 CET 2006 Initial creation.
+ *
+ * @TODO Comare data before writing it. This implies that the volume
+ * parameters are compared first: size, alignment, name, type, ...,
+ * this is the same, compare the data. Volume deletion is deffered
+ * until the difference has been found out.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#define __USE_GNU
+#include <string.h>
+
+#include <libubi.h>
+#include <pfiflash.h>
+
+#include <mtd/ubi-user.h> /* FIXME Is this ok here!!?? */
+
+#include "ubimirror.h"
+#include "error.h"
+#include "reader.h"
+#include "example_ubi.h"
+#include "bootenv.h"
+
+static const char copyright [] __attribute__((unused)) =
+ "Copyright (c) International Business Machines Corp., 2006";
+
+#define EBUF(fmt...) do { \
+ snprintf(err_buf, err_buf_size, fmt); \
+ } while (0)
+
+static pdd_func_t pdd_funcs[PDD_HANDLING_NUM] =
+ {
+ &bootenv_pdd_keep,
+ &bootenv_pdd_merge,
+ &bootenv_pdd_overwrite
+ };
+/**< An array of PDD function pointers indexed by the algorithm. */
+
+
+typedef enum ubi_update_process_t {
+ UBI_REMOVE = 0,
+ UBI_WRITE,
+} ubi_update_process_t;
+
+static int
+skip_raw_sections(FILE* pfi, list_t pfi_raws,
+ char* err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+
+ void *i;
+ list_t ptr;
+ size_t j, skip_size;
+
+ if (is_empty(pfi_raws))
+ return 0;
+
+ foreach(i, ptr, pfi_raws) {
+ skip_size = ((pfi_raw_t)i)->data_size;
+ for(j = 0; j < skip_size; j++) {
+ fgetc(pfi);
+ if (ferror(pfi)) {
+ EBUF("Cannot skip raw section in PFI.");
+ rc = -EIO;
+ goto err;
+ }
+ }
+ }
+ err:
+ return rc;
+}
+
+/**
+ * @brief Wraps the ubi_mkvol functions and implements a hook for the bootenv
+ * update.
+ * @param devno UBI device number.
+ * @param s Current seqnum.
+ * @param u Information about the UBI volume from the PFI.
+ * @param err_buf An error buffer.
+ * @param err_buf_size The size of the error buffer.
+ * @return 0 On Sucess.
+ * @return else Error.
+ */
+static int
+my_ubi_mkvol(int devno, int s, pfi_ubi_t u, char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ int type;
+ ubi_lib_t ulib = NULL;
+
+ log_msg("%s(vol_id=%d, size=%d, data_size=%d, type=%d, "
+ "alig=%d, nlen=%d, name=%s)", __func__,
+ u->ids[s], u->size, u->data_size, u->type, u->alignment,
+ strnlen(u->names[s], PFI_UBI_VOL_NAME_LEN), u->names[s]);
+
+ rc = ubi_open(&ulib);
+ if (rc != 0) {
+ goto err;
+ }
+
+ switch (u->type) {
+ case pfi_ubi_static:
+ type = UBI_STATIC_VOLUME; break;
+ case pfi_ubi_dynamic:
+ type = UBI_DYNAMIC_VOLUME; break;
+ default:
+ type = UBI_DYNAMIC_VOLUME;
+ }
+
+ rc = ubi_mkvol(ulib, devno, u->ids[s], type, u->size, u->alignment,
+ u->names[s]);
+ if (rc != 0) {
+ EBUF("Cannot create volume: %d", u->ids[s]);
+ goto err;
+ }
+
+ err:
+ if (ulib != NULL)
+ ubi_close(&ulib);
+ return rc;
+}
+
+/**
+ * @brief A wrapper around the UBI library function ubi_rmvol.
+ * @param devno UBI device number.
+ * @param s Current seqnum.
+ * @param u Information about the UBI volume from the PFI.
+ * @param err_buf An error buffer.
+ * @param err_buf_size The size of the error buffer.
+ *
+ * If the volume does not exist, the function will return success.
+ */
+static int
+my_ubi_rmvol(int devno, uint32_t id, char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ ubi_lib_t ulib = NULL;
+ int fd;
+
+ log_msg("%s(id=%d)", __func__, id);
+
+ rc = ubi_open(&ulib);
+ if (rc != 0)
+ goto err;
+
+ /**
+ * Truncate if it exist or not.
+ */
+ fd = ubi_vol_open(ulib, devno, id, O_RDWR);
+ if (fd == -1)
+ return 0; /* not existent, return */
+
+ rc = ubi_vol_update(fd, 0);
+ if (rc < 0) {
+ fprintf(stderr, "update failed rc=%d errno=%d\n", rc, errno);
+ ubi_vol_close(fd);
+ goto err; /* if EBUSY than empty device, continue */
+ }
+ ubi_vol_close(fd);
+
+ rc = ubi_rmvol(ulib, devno, id);
+ if (rc != 0) {
+ /* @TODO Define a ubi_rmvol return value which says
+ * sth like EUBI_NOSUCHDEV. In this case, a failed
+ * operation is acceptable. Everything else has to be
+ * classified as real error. But talk to Andreas Arnez
+ * before defining something odd...
+ */
+ /* if ((errno == EINVAL) || (errno == ENODEV))
+ return 0; */ /* currently it is EINVAL or ENODEV */
+
+ dbg_msg("Remove UBI volume %d returned with error: %d "
+ "errno=%d", id, rc, errno);
+ goto err;
+ }
+ err:
+ if (ulib != NULL)
+ ubi_close(&ulib);
+ return rc;
+}
+
+static int
+read_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ ubi_lib_t ulib = NULL;
+ FILE* fp_in = NULL;
+
+ rc = ubi_open(&ulib);
+ if (rc)
+ return rc;
+
+ fp_in = ubi_vol_fopen_read(ulib, devno, id);
+ if (!fp_in) {
+ EBUF("Cannot open bootenv volume");
+ rc = -EIO;
+ goto err;
+ }
+
+ log_msg("%s reading old bootenvs", __func__);
+
+ /* Save old bootenvs for reference */
+ rc = bootenv_read(fp_in, bootenv_old, BOOTENV_MAXSIZE);
+ if (rc)
+ EBUF("Cannot read bootenv_old");
+ err:
+ if (fp_in)
+ fclose(fp_in);
+ if (ulib)
+ ubi_close(&ulib);
+ return rc;
+}
+
+static int
+write_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
+ pdd_func_t pdd_f,
+ FILE* fp_in, /* new pdd data contained in pfi */
+ size_t fp_in_size, /* data size of new pdd data in pfi */
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ int warnings = 0;
+ ubi_lib_t ulib = NULL;
+ bootenv_t bootenv_new = NULL;
+ bootenv_t bootenv_res = NULL;
+ size_t update_size = 0;
+ FILE *fp_out = NULL;
+
+ log_msg("%s(id=%d, fp_in=%p)", __func__, id, fp_in);
+
+ /* Workflow:
+ * 1. Apply PDD operation and get the size of the returning
+ * bootenv_res section. Without the correct size it wouldn't
+ * be possible to call UBI update vol.
+ * 2. Call UBI update vol
+ * 3. Get FILE* to vol dev
+ * 4. Write to FILE*
+ */
+
+ rc = ubi_open(&ulib);
+ if (rc != 0) {
+ goto err;
+ }
+
+ rc = bootenv_create(&bootenv_new);
+ if (rc != 0)
+ goto err;
+ rc = bootenv_create(&bootenv_res);
+ if (rc != 0)
+ goto err;
+
+ rc = bootenv_read(fp_in, bootenv_new, fp_in_size);
+ if (rc != 0)
+ goto err;
+
+ rc = pdd_f(bootenv_old, bootenv_new, &bootenv_res, &warnings,
+ err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ if (warnings) {
+ /* @TODO Do sth with the warning */
+ dbg_msg("A warning in the PDD operation occured: %d",
+ warnings);
+ }
+ log_msg("... (2)");
+
+ rc = bootenv_size(bootenv_res, &update_size);
+ if (rc != 0)
+ goto err;
+
+ fp_out = ubi_vol_fopen_update(ulib, devno, id, update_size);
+ if (fp_out == NULL)
+ goto err;
+
+ rc = bootenv_write(fp_out, bootenv_res);
+ if (rc != 0) {
+ EBUF("Write operation on ubi%d_%d failed.", devno, id);
+ rc = -EIO;
+ goto err;
+ }
+
+ err:
+ if (ulib != NULL)
+ ubi_close(&ulib);
+ if (bootenv_new != NULL)
+ bootenv_destroy(&bootenv_new);
+ if (bootenv_res != NULL)
+ bootenv_destroy(&bootenv_res);
+ if (fp_out)
+ fclose(fp_out);
+ return rc;
+}
+
+static int
+write_normal_volume(int devno, uint32_t id, size_t update_size, FILE* fp_in,
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ ubi_lib_t ulib = NULL;
+ FILE* fp_out = NULL;
+ int c;
+ size_t i;
+
+ log_msg("%s(id=%d, update_size=%d fp_in=%p)",
+ __func__, id, update_size, fp_in);
+
+ rc = ubi_open(&ulib);
+ if (rc)
+ return rc;
+
+ fp_out = ubi_vol_fopen_update(ulib, devno, id, update_size);
+ if (fp_out == NULL) {
+ rc = -1;
+ goto err;
+ }
+
+ log_msg("starting the update ... "); /* FIXME DBG */
+ for (i = 0; i < update_size; i++) {
+ c = getc(fp_in);
+ if (c == EOF && ferror(fp_in)) {
+ rc = -EIO;
+ goto err;
+ }
+ if (putc(c, fp_out) == EOF) {
+ rc = -EIO;
+ goto err;
+ }
+ /* FIXME DBG */
+ /* if ((i & 0xFFF) == 0xFFF) log_msg("."); */
+ }
+ /* log_msg("\n"); */ /* FIXME DBG */
+ err:
+ if (fp_out)
+ fclose(fp_out);
+ if (ulib)
+ ubi_close(&ulib);
+ return rc;
+}
+
+
+/**
+ * @brief ...
+ * @precondition The PFI file contains at least one ubi_id entry.
+ * This is assured by the PFI read process.
+ * @postcondition The used seqnum number is set in the UBI PFI
+ * header list.
+ * The UBI volumes specified by seqnum are processed.
+ */
+static int
+process_ubi_volumes(FILE* pfi, int seqnum, list_t pfi_ubis,
+ bootenv_t bootenv_old, pdd_func_t pdd_f,
+ ubi_update_process_t ubi_update_process,
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ pfi_ubi_t u;
+ list_t ptr;
+
+ foreach(u, ptr, pfi_ubis) {
+ int s = seqnum;
+ if (seqnum > (u->ids_size - 1)) {
+ s = 0; /* per default use the first */
+ }
+ u->curr_seqnum = s;
+
+ switch (ubi_update_process) {
+ case UBI_REMOVE:
+ if ((u->ids[s] == EXAMPLE_BOOTENV_VOL_ID_1) ||
+ (u->ids[s] == EXAMPLE_BOOTENV_VOL_ID_2)) {
+ rc =read_bootenv_volume(EXAMPLE_UBI_DEVICE,
+ u->ids[s],
+ bootenv_old, err_buf,
+ err_buf_size);
+ if (rc != 0)
+ goto err;
+ }
+ rc = my_ubi_rmvol(EXAMPLE_UBI_DEVICE, u->ids[s],
+ err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ break;
+ case UBI_WRITE:
+ rc = my_ubi_mkvol(EXAMPLE_UBI_DEVICE, s, u,
+ err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ if ((u->ids[s] == EXAMPLE_BOOTENV_VOL_ID_1) ||
+ (u->ids[s] == EXAMPLE_BOOTENV_VOL_ID_2)) {
+ rc = write_bootenv_volume(EXAMPLE_UBI_DEVICE,
+ u->ids[s],
+ bootenv_old, pdd_f,
+ pfi,
+ u->data_size,
+ err_buf,
+ err_buf_size);
+ }
+ else {
+ rc = write_normal_volume(EXAMPLE_UBI_DEVICE,
+ u->ids[s],
+ u->data_size, pfi,
+ err_buf,
+ err_buf_size);
+ }
+ if (rc != 0)
+ goto err;
+ break;
+ default:
+ EBUF("Invoked unknown UBI operation.");
+ rc = -1;
+ goto err;
+
+ }
+ if (rc != 0) {
+ goto err;
+ }
+ }
+ err:
+ return rc;
+
+}
+
+static int
+erase_unmapped_ubi_volumes(int devno, list_t pfi_ubis,
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ list_t ptr;
+ pfi_ubi_t u;
+ size_t i;
+ uint8_t ubi_volumes[PFI_UBI_MAX_VOLUMES];
+
+ for (i = 0; i < PFI_UBI_MAX_VOLUMES; i++) {
+ ubi_volumes[i] = 1;
+ }
+
+ foreach(u, ptr, pfi_ubis) {
+ /* iterate over each vol_id */
+ for(i = 0; i < u->ids_size; i++) {
+ if (u->ids[i] > PFI_UBI_MAX_VOLUMES) {
+ EBUF("PFI file contains an invalid "
+ "volume id: %d", u->ids[i]);
+ goto err;
+ }
+ /* remove from removal list */
+ ubi_volumes[u->ids[i]] = 0;
+ }
+ }
+
+ for (i = 0; i < PFI_UBI_MAX_VOLUMES; i++) {
+ if (ubi_volumes[i]) {
+ rc = my_ubi_rmvol(devno, i, err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ }
+ }
+ err:
+ return rc;
+}
+
+static int
+mirror_ubi_volumes(uint32_t devno, list_t pfi_ubis,
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ list_t ptr;
+ uint32_t j;
+ pfi_ubi_t i;
+ ubi_lib_t ulib = NULL;
+
+ log_msg("%s(...)", __func__);
+
+ rc = ubi_open(&ulib);
+ if (rc != 0)
+ goto err;
+
+ /**
+ * Execute all mirror operations on redundant groups.
+ * Create a volume within a redundant group if it does
+ * not exist already (this is a precondition of
+ * ubimirror).
+ */
+ foreach(i, ptr, pfi_ubis) {
+ for(j = 0; j < i->ids_size; j++) {
+ /* skip self-match */
+ if (i->ids[j] == i->ids[i->curr_seqnum])
+ continue;
+
+ rc = my_ubi_rmvol(devno, i->ids[j], err_buf,
+ err_buf_size);
+ if (rc != 0)
+ goto err;
+
+ rc = my_ubi_mkvol(devno, j, i, err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ }
+ }
+
+ foreach(i, ptr, pfi_ubis) {
+ rc = ubimirror(devno, i->curr_seqnum, i->ids,
+ i->ids_size, err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ }
+
+
+ err:
+ if (ulib != NULL)
+ ubi_close(&ulib);
+ return rc;
+}
+
+int
+pfiflash(FILE* pfi, int complete, int seqnum, pdd_handling_t pdd_handling,
+ char *err_buf, size_t err_buf_size)
+{
+ int rc = 0;
+ pdd_func_t pdd_f = NULL;
+
+ if (pfi == NULL)
+ return -EINVAL;
+
+ /**
+ * If the user didnt specify a seqnum we start per default
+ * with the index 0
+ */
+ int curr_seqnum = seqnum < 0 ? 0 : seqnum;
+
+ list_t pfi_raws = mk_empty(); /* list of raw sections from a pfi */
+ list_t pfi_ubis = mk_empty(); /* list of ubi sections from a pfi */
+
+ bootenv_t bootenv;
+ rc = bootenv_create(&bootenv);
+ if (rc != 0) {
+ EBUF("Cannot create bootenv variable");
+ }
+
+ rc = read_pfi_headers(&pfi_raws, &pfi_ubis, pfi,
+ err_buf, err_buf_size);
+ if (rc != 0) {
+ EBUF("Cannot read PFI headers.");
+ goto err;
+ }
+
+ /* @TODO: If you want to implement an IPL update - start here. */
+ rc = skip_raw_sections(pfi, pfi_raws, err_buf, err_buf_size);
+ if (rc != 0) {
+ goto err;
+ }
+
+ if (complete) {
+ rc = erase_unmapped_ubi_volumes(EXAMPLE_UBI_DEVICE, pfi_ubis,
+ err_buf, err_buf_size);
+ if (rc != 0) {
+ EBUF("Cannot delete unmapped UBI volumes.");
+ goto err;
+ }
+ }
+
+ if ((pdd_handling >= 0) && (pdd_handling < PDD_HANDLING_NUM)) {
+ pdd_f = pdd_funcs[pdd_handling];
+ }
+ else {
+ EBUF("Used unknown PDD handling algorithm (pdd_handling)");
+ }
+
+ rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv, pdd_f,
+ UBI_REMOVE, err_buf, err_buf_size);
+ if (rc != 0) {
+ goto err;
+ }
+ rc = process_ubi_volumes(pfi, curr_seqnum, pfi_ubis, bootenv, pdd_f,
+ UBI_WRITE, err_buf, err_buf_size);
+ if (rc != 0) {
+ goto err;
+ }
+ if (seqnum < 0) { /* mirror redundant pairs */
+ rc = mirror_ubi_volumes(EXAMPLE_UBI_DEVICE, pfi_ubis,
+ err_buf, err_buf_size);
+ if (rc != 0)
+ goto err;
+ }
+
+ err:
+ pfi_raws = remove_all((free_func_t)&free_pfi_raw, pfi_raws);
+ pfi_ubis = remove_all((free_func_t)&free_pfi_ubi, pfi_ubis);
+ bootenv_destroy(&bootenv);
+ return rc;
+}
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