From 576f55b02d9ec478bd5157352c884e3543bcca58 Mon Sep 17 00:00:00 2001

From: Peter Jones <pjones@redhat.com>

Date: Mon, 17 Sep 2018 16:52:57 -0400

Subject: [PATCH 34/39] Handle partition name parsing and formatting for

 partitioned md.

Signed-off-by: Peter Jones <pjones@redhat.com>

---

 src/linux-md.c | 103 +++++++++++++++++++++++++++++++++++++++++++++++++

 1 file changed, 103 insertions(+)

 create mode 100644 src/linux-md.c

diff --git a/src/linux-md.c b/src/linux-md.c

new file mode 100644

index 00000000000..0a5c1cdb435

--- /dev/null

+++ b/src/linux-md.c

@@ -0,0 +1,103 @@

+/*

+ * libefiboot - library for the manipulation of EFI boot variables

+ * Copyright 2012-2018 Red Hat, Inc.

+ *

+ * This library is free software; you can redistribute it and/or

+ * modify it under the terms of the GNU Lesser General Public License as

+ * published by the Free Software Foundation; either version 2.1 of the

+ * License, or (at your option) any later version.

+ *

+ * This library 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

+ * Lesser General Public License for more details.

+ *

+ * You should have received a copy of the GNU Lesser General Public

+ * License along with this library; if not, see

+ * <http://www.gnu.org/licenses/>.

+ *

+ */

+

+#include "fix_coverity.h"

+

+#include <errno.h>

+#include <fcntl.h>

+#include <inttypes.h>

+#include <stdint.h>

+#include <unistd.h>

+

+#include "efiboot.h"

+

+/*

+ * "support" for partitioned md devices - basically we just need to format

+ * the partition name.

+ *

+ * /sys/dev/block/$major:$minor looks like:

+ * 259:0 -> ../../devices/virtual/block/md1/md1p1

+ * 9:1 -> ../../devices/virtual/block/md1

+ *

+ */

+

+static ssize_t

+parse_md(struct device *dev, const char *current, const char *root UNUSED)

+{

+        int rc;

+        int32_t md, tosser0, part;

+        int pos0 = 0, pos1 = 0;

+        char *spaces;

+

+        pos0 = strlen(current);

+        spaces = alloca(pos0+1);

+        memset(spaces, ' ', pos0+1);

+        spaces[pos0] = '\0';

+        pos0 = 0;

+

+        debug("entry");

+

+        debug("searching for mdM/mdMpN");

+        rc = sscanf(current, "md%d/%nmd%dp%d%n",

+                    &md, &pos0, &tosser0, &part, &pos1);

+        debug("current:\"%s\" rc:%d pos0:%d pos1:%d\n", current, rc, pos0, pos1);

+        arrow(LOG_DEBUG, spaces, 9, pos0, rc, 3);

+        /*

+         * If it isn't of that form, it's not one of our partitioned md devices.

+         */

+        if (rc != 3)

+                return 0;

+

+        dev->interface_type = md;

+

+        if (dev->part == -1)

+                dev->part = part;

+

+        return pos1;

+}

+

+

+static char *

+make_part_name(struct device *dev)

+{

+        char *ret = NULL;

+        ssize_t rc;

+

+        if (dev->part < 1)

+                return NULL;

+

+        rc = asprintf(&ret, "%sp%d", dev->disk_name, dev->part);

+        if (rc < 0) {

+                efi_error("could not allocate memory");

+                return NULL;

+        }

+

+        return ret;

+}

+

+static enum interface_type md_iftypes[] = { md, unknown };

+

+struct dev_probe HIDDEN md_parser = {

+        .name = "md",

+        .iftypes = md_iftypes,

+        .flags = DEV_PROVIDES_HD,

+        .parse = parse_md,

+        .make_part_name = make_part_name,

+};

-- 

2.17.1