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authorBrad Bishop <bradleyb@us.ibm.com>2014-06-30 22:10:16 -0500
committerPatrick Williams <iawillia@us.ibm.com>2014-07-02 22:49:29 -0500
commitbf4630076762d9c20c16c80c1c791f352b046dd1 (patch)
treeefc67bad010a28fd1abf5aeeefda2a969514fd97 /fpart/src/cmd_erase.c
downloadffs-bf4630076762d9c20c16c80c1c791f352b046dd1.tar.gz
ffs-bf4630076762d9c20c16c80c1c791f352b046dd1.zip
Port FFS tools over from Building Block repository.
Diffstat (limited to 'fpart/src/cmd_erase.c')
-rw-r--r--fpart/src/cmd_erase.c206
1 files changed, 206 insertions, 0 deletions
diff --git a/fpart/src/cmd_erase.c b/fpart/src/cmd_erase.c
new file mode 100644
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--- /dev/null
+++ b/fpart/src/cmd_erase.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2012
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * File: erase.c
+ * Author: Shaun Wetzstein <shaun@us.ibm.com>
+ * Descr: --erase implementation
+ * Date: 01/30/2013
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <fcntl.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
+#include <ctype.h>
+#include <regex.h>
+
+#include <clib/attribute.h>
+#include <clib/assert.h>
+#include <clib/list.h>
+#include <clib/list_iter.h>
+#include <clib/misc.h>
+#include <clib/min.h>
+#include <clib/err.h>
+#include <clib/raii.h>
+
+#include "main.h"
+
+int command_erase(args_t * args)
+{
+ assert(args != NULL);
+
+ char name[strlen(args->name) + 2];
+ strcpy(name, args->name);
+ if (strrchr(name, '$') == NULL)
+ strcat(name, "$");
+
+ size_t pad = 0xff;
+ if (args->pad != NULL)
+ if (parse_size(args->pad, &pad) < 0)
+ return -1;
+
+ char full_name[page_size];
+ regex_t rx;
+
+ ffs_t * __ffs;
+ off_t __poffset;
+
+ list_t list;
+ list_init(&list);
+
+ list_iter_t it;
+ ffs_entry_node_t * node;
+
+ /* ========================= */
+
+ int erase_entry(ffs_entry_t * entry)
+ {
+ if (__ffs_entry_name(__ffs, entry, full_name,
+ sizeof full_name) < 0)
+ return -1;
+
+ if (regexec(&rx, full_name, 0, NULL, 0) == REG_NOMATCH)
+ return 0;
+
+ if (entry->flags & FFS_FLAGS_PROTECTED &&
+ args->force != f_FORCE) {
+ if (args->verbose == f_VERBOSE)
+ printf("%llx: %s: protected, skipping erase\n",
+ __poffset, full_name);
+ return 0;
+ }
+
+ if (__ffs_entry_truncate(__ffs, full_name, 0) < 0)
+ return -1;
+
+ if (args->verbose == f_VERBOSE)
+ printf("%llx: %s: truncate size '%x'\n", __poffset,
+ full_name, 0);
+
+ for (uint32_t i=0; i<FFS_USER_WORDS; i++)
+ if (__ffs_entry_user_put(__ffs, full_name, i, 0) < 0)
+ return -1;
+
+ if (args->verbose == f_VERBOSE)
+ printf("%llx: %s: user[] zero\n", __poffset, full_name);
+
+ list_iter_init(&it, &list, LI_FLAG_FWD);
+ list_for_each(&it, node, node) {
+ if (node->entry.base == entry->base) {
+ if (args->verbose == f_VERBOSE)
+ printf("%llx: %s: skipping fill with "
+ "'%x'\n", __poffset, full_name,
+ (uint8_t)pad);
+ return 0;
+ }
+ }
+
+ node = (ffs_entry_node_t *)malloc(sizeof(*node));
+ assert(node != NULL);
+
+ memcpy(&node->entry, entry, sizeof(node->entry));
+ list_add_tail(&list, &node->node);
+
+ uint32_t block_size = __ffs->hdr->block_size;
+
+ if (args->block != NULL) {
+ if (parse_size(args->block, &block_size) < 0)
+ return -1;
+ if (block_size & (__ffs->hdr->block_size-1)) {
+ UNEXPECTED("'%x' block size must be multiple "
+ "of target block size '%x'",
+ block_size, __ffs->hdr->block_size);
+ return -1;
+ }
+ }
+
+ if (__ffs_buffer(__ffs, block_size) < 0)
+ return -1;
+
+ RAII(void*, block, malloc(block_size), free);
+ if (block == NULL) {
+ ERRNO(errno);
+ return -1;
+ }
+ memset(block, pad, block_size);
+
+ for (uint32_t i = 0; i < entry->size; i++)
+ if(__ffs_entry_write(__ffs, full_name, block, i * block_size, block_size) < 0)
+ return -1;
+
+ __ffs_fsync(__ffs);
+
+ if (__ffs_entry_truncate(__ffs, full_name, 0) < 0)
+ return -1;
+
+ if (args->verbose == f_VERBOSE)
+ printf("%llx: %s: filled with '%x'\n", __poffset,
+ full_name, (uint8_t)pad);
+
+ return 0;
+ }
+
+ int erase(args_t * args, off_t poffset)
+ {
+ __poffset = poffset;
+
+ const char * target = args->target;
+ int debug = args->debug;
+
+ RAII(FILE*, file, fopen_generic(target, "r+", debug), fclose);
+ if (file == NULL)
+ return -1;
+ RAII(ffs_t*, ffs, __ffs_fopen(file, poffset), __ffs_fclose);
+ if (ffs == NULL)
+ return -1;
+
+ __ffs = ffs;
+
+ int rc = __ffs_iterate_entries(ffs, erase_entry);
+ if (rc == 1)
+ rc = -1;
+
+ return rc;
+ }
+
+ /* ========================= */
+
+ if (regcomp(&rx, name, REG_ICASE | REG_NOSUB) != 0) {
+ ERRNO(errno);
+ return -1;
+ }
+
+ int rc = command(args, erase);
+
+ regfree(&rx);
+
+ while (!list_empty(&list))
+ free(container_of(list_remove_head(&list),
+ ffs_entry_node_t, node));
+
+ return rc;
+}
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