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qdl: Add support for <read> operations
Being able to read the content of the flash is useful for e.g. making backups or for testing purposes, add support for a new type of XML containing <read> tags and execute these operations after flashing and patching. [bjorn: Rebased on master, updated commit message, moved read_op_exec after patching] Signed-off-by: Bjorn Andersson <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * Copyright (c) 2016-2017, Linaro Ltd. | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are met: | ||
| * | ||
| * 1. Redistributions of source code must retain the above copyright notice, | ||
| * this list of conditions and the following disclaimer. | ||
| * | ||
| * 2. 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. | ||
| * | ||
| * 3. Neither the name of the copyright holder 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 <fcntl.h> | ||
| #include <errno.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include <unistd.h> | ||
| #include <libxml/parser.h> | ||
| #include <libxml/tree.h> | ||
|
|
||
| #include "read.h" | ||
| #include "qdl.h" | ||
|
|
||
| static struct read_op *read_ops; | ||
| static struct read_op *read_ops_last; | ||
|
|
||
| int read_op_load(const char *read_op_file) | ||
| { | ||
| struct read_op *read_op; | ||
| xmlNode *node; | ||
| xmlNode *root; | ||
| xmlDoc *doc; | ||
| int errors; | ||
|
|
||
| doc = xmlReadFile(read_op_file, NULL, 0); | ||
| if (!doc) { | ||
| fprintf(stderr, "[READ] failed to parse %s\n", read_op_file); | ||
| return -EINVAL; | ||
| } | ||
|
|
||
| root = xmlDocGetRootElement(doc); | ||
| for (node = root->children; node ; node = node->next) { | ||
| if (node->type != XML_ELEMENT_NODE) | ||
| continue; | ||
|
|
||
| if (xmlStrcmp(node->name, (xmlChar*)"read")) { | ||
| fprintf(stderr, "[READ] unrecognized tag \"%s\", ignoring\n", node->name); | ||
| continue; | ||
| } | ||
|
|
||
| errors = 0; | ||
|
|
||
| read_op = calloc(1, sizeof(struct read_op)); | ||
|
|
||
| read_op->sector_size = attr_as_unsigned(node, "SECTOR_SIZE_IN_BYTES", &errors); | ||
| read_op->filename = attr_as_string(node, "filename", &errors); | ||
| read_op->partition = attr_as_unsigned(node, "physical_partition_number", &errors); | ||
| read_op->num_sectors = attr_as_unsigned(node, "num_partition_sectors", &errors); | ||
| read_op->start_sector = attr_as_string(node, "start_sector", &errors); | ||
|
|
||
| if (errors) { | ||
| fprintf(stderr, "[READ] errors while parsing read\n"); | ||
| free(read_op); | ||
| continue; | ||
| } | ||
|
|
||
| if (read_ops) { | ||
| read_ops_last->next = read_op; | ||
| read_ops_last = read_op; | ||
| } else { | ||
| read_ops = read_op; | ||
| read_ops_last = read_op; | ||
| } | ||
| } | ||
|
|
||
| xmlFreeDoc(doc); | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| int read_op_execute(struct qdl_device *qdl, int (*apply)(struct qdl_device *qdl, struct read_op *read_op, int fd), | ||
| const char *incdir) | ||
| { | ||
| struct read_op *read_op; | ||
| const char *filename; | ||
| char tmp[PATH_MAX]; | ||
| int ret; | ||
| int fd; | ||
|
|
||
| for (read_op = read_ops; read_op; read_op = read_op->next) { | ||
| filename = read_op->filename; | ||
| if (incdir) { | ||
| snprintf(tmp, PATH_MAX, "%s/%s", incdir, filename); | ||
| if (access(tmp, F_OK) != -1) | ||
| filename = tmp; | ||
| } | ||
|
|
||
| fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644); | ||
|
|
||
| if (fd < 0) { | ||
| printf("Unable to open %s...\n", read_op->filename); | ||
| return ret; | ||
| } | ||
|
|
||
| ret = apply(qdl, read_op, fd); | ||
|
|
||
| close(fd); | ||
| if (ret) | ||
| return ret; | ||
| } | ||
|
|
||
| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| #ifndef __READ_H__ | ||
| #define __READ_H__ | ||
|
|
||
| #include <stdbool.h> | ||
|
|
||
| struct qdl_device; | ||
|
|
||
| struct read_op { | ||
| unsigned sector_size; | ||
| const char *filename; | ||
| unsigned partition; | ||
| unsigned num_sectors; | ||
| const char *start_sector; | ||
| struct read_op *next; | ||
| }; | ||
|
|
||
| int read_op_load(const char *read_op_file); | ||
| int read_op_execute(struct qdl_device *qdl, | ||
| int (*apply)(struct qdl_device *qdl, struct read_op *read_op, int fd), | ||
| const char *incdir); | ||
|
|
||
| #endif |