From af7bbe5a6c00a95d2e2deb0accbe2c0ed375df02 Mon Sep 17 00:00:00 2001
From: Heinz Mauelshagen <heinzm@redhat.com>
Date: Tue, 5 Feb 2002 14:31:57 +0000
Subject: [PATCH] Poor mans lvmdiskscan

---
 tools/Makefile.in   |   1 +
 tools/commands.h    |   3 +-
 tools/lvmdiskscan.c | 146 ++++++++++++++++++++++++++++++++++++++++++++
 tools/stub.h        |   1 -
 4 files changed, 148 insertions(+), 3 deletions(-)
 create mode 100644 tools/lvmdiskscan.c

diff --git a/tools/Makefile.in b/tools/Makefile.in
index 1c82b288f..bff661830 100644
--- a/tools/Makefile.in
+++ b/tools/Makefile.in
@@ -28,6 +28,7 @@ SOURCES=\
 	lvextend.c \
 	lvm.c \
 	lvmchange.c \
+	lvmdiskscan.c \
 	lvreduce.c \
 	lvremove.c \
 	lvrename.c \
diff --git a/tools/commands.h b/tools/commands.h
index 6e5049c12..3c8acea24 100644
--- a/tools/commands.h
+++ b/tools/commands.h
@@ -149,8 +149,7 @@ xx(lvmdiskscan,
    "lvmdiskscan\n"
    "\t[-d/--debug]\n"
    "\t[-h/-?/--help]\n"
-   "\t[-l/--lvmpartition]\n"
-   "\t[-v/--verbose]\n",
+   "\t[-l/--lvmpartition]\n",
 
    lvmpartition_ARG)
 
diff --git a/tools/lvmdiskscan.c b/tools/lvmdiskscan.c
new file mode 100644
index 000000000..a20b917d9
--- /dev/null
+++ b/tools/lvmdiskscan.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2002 Sistina Software
+ *
+ * This file is released under the GPL.
+ *
+ */
+
+/*
+ * Changelog
+ *
+ *   05/02/2002 - First drop [HM]
+ */
+
+#include "tools.h"
+
+int _get_max_dev_name_len(void);
+void _count(struct device*, int*, int*);
+void _print(struct device*, uint64_t, char*);
+int _check_device(struct device*);
+
+int disks_found = 0;
+int parts_found = 0;
+int pv_disks_found = 0;
+int pv_parts_found = 0;
+int max_len;
+
+int lvmdiskscan(int argc, char **argv)
+{
+	uint64_t size;
+        struct dev_iter *iter;
+        struct device *dev;
+	struct physical_volume *pv;
+
+	if (arg_count(lvmpartition_ARG))
+		log_print("WARNING: only considering LVM devices");
+
+	max_len = _get_max_dev_name_len();
+
+        if (!(iter = dev_iter_create(fid->cmd->filter))) {
+                log_error("dev_iter_create failed");
+                return 0;
+        }
+
+        /* Do scan */
+        for (dev = dev_iter_get(iter); dev; dev = dev_iter_get(iter)) {
+		/* Try if it is a PV first */
+		if((pv = fid->ops->pv_read(fid, dev_name(dev)))) {
+			if(!dev_get_size(dev, &size)) {
+				log_error("Couldn't get size of \"%s\"",
+					  dev_name(dev));
+				continue;
+			}
+			_print(dev, size, "LVM physical volume");
+			_count(dev, &pv_disks_found, &pv_parts_found);
+			continue;
+		}
+		/* If user just wants PVs we are done */
+		if (arg_count(lvmpartition_ARG)) continue;
+		
+		/* What other device is it? */
+		if(!_check_device(dev)) continue;
+        }
+        dev_iter_destroy(iter);
+
+	/* Display totals */
+	if (!arg_count(lvmpartition_ARG)) {
+		log_print("%d disk%s",
+			  disks_found, disks_found == 1 ? "" : "s");
+		log_print("%d partition%s",
+			  parts_found, parts_found == 1 ? "" : "s");
+	}
+	log_print("%d LVM physical volume whole disk%s",
+		  pv_disks_found, pv_disks_found == 1 ? "" : "s");
+	log_print("%d LVM physical volume%s",
+		  pv_parts_found, pv_parts_found == 1 ? "" : "s");
+
+	return 0;
+}
+
+
+int _check_device(struct device *dev) {
+	char buffer;
+	uint64_t size;
+
+	if (!dev_open(dev, 0)) {
+		return 0;
+	}
+	if (dev_read(dev, 0, 1, &buffer) != 1) {
+		dev_close(dev);
+		return 0;
+	}
+	if(!dev_get_size(dev, &size)) {
+		log_error("Couldn't get size of \"%s\"",
+			  dev_name(dev));
+	}
+	_print(dev, size, NULL);
+	_count(dev, &disks_found, &parts_found);
+	if (!dev_close(dev)) {
+               	log_error("dev_close on \"%s\" failed", dev_name(dev));
+		return 0;
+	}
+	return 1;
+}
+
+
+int _get_max_dev_name_len(void) {
+	int len = 0;
+	int max_len = 0;
+        struct dev_iter *iter;
+        struct device *dev;
+
+        if (!(iter = dev_iter_create(fid->cmd->filter))) {
+                log_error("dev_iter_create failed");
+                return 0;
+        }
+
+        /* Do scan */
+        for (dev = dev_iter_get(iter); dev; dev = dev_iter_get(iter)) {
+		len = strlen(dev_name(dev));
+		if (len > max_len) max_len = len;
+	}
+        dev_iter_destroy(iter);
+
+	return max_len;
+}
+
+
+void _count(struct device *dev, int *disks, int *parts) {
+	int c = dev_name(dev)[strlen(dev_name(dev))-1];
+
+	if(!isdigit(c))	(*disks)++;
+	else		(*parts)++;
+}
+
+void _print(struct device *dev, uint64_t size, char *what) {
+	char *dummy = display_size(size/2, SIZE_SHORT);
+	const char *name = dev_name(dev);
+
+	if(!what) {
+		
+		what = "";
+	}
+
+	log_print("%-*s [%15s] %s", max_len, name, dummy, what);
+	dbg_free(dummy);
+}
diff --git a/tools/stub.h b/tools/stub.h
index 908ee753b..e0bcb107d 100644
--- a/tools/stub.h
+++ b/tools/stub.h
@@ -7,7 +7,6 @@
 #define unimplemented \
 	{ log_error("Command not implemented yet."); return ECMD_FAILED;}
 int e2fsadm(int argc, char **argv) unimplemented
-int lvmdiskscan(int argc, char **argv) unimplemented
 int lvmsadc(int argc, char **argv) unimplemented
 int lvmsar(int argc, char **argv) unimplemented
 int pvdata(int argc, char **argv) unimplemented
-- 
2.43.5