From 8b921f667afc86c452242be0b6d3b257472ebe76 Mon Sep 17 00:00:00 2001
From: Ralf Ertzinger <ralf@skytale.net>
Date: Wed, 23 Oct 2013 10:33:33 +0200
Subject: [PATCH] Introduce zpool_get_prop_literal interface

This change introduces zpool_get_prop_literal. It's an expanded version
of zpool_get_prop taking one additional boolean parameter. With this
parameter set to B_FALSE it will behave identically to zpool_get_prop.
Setting it to B_TRUE will return full precision numbers for the
following properties:

ZPOOL_PROP_SIZE
ZPOOL_PROP_ALLOCATED
ZPOOL_PROP_FREE
ZPOOL_PROP_FREEING
ZPOOL_PROP_EXPANDSZ
ZPOOL_PROP_ASHIFT

Also introduced is a wrapper function for zpool_get_prop making it
use zpool_get_prop_literal in the background.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1813
---
 include/libzfs.h         |  2 ++
 lib/libzfs/libzfs_pool.c | 20 +++++++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/include/libzfs.h b/include/libzfs.h
index 273286ceb8f5..c212a0c05a0c 100644
--- a/include/libzfs.h
+++ b/include/libzfs.h
@@ -281,6 +281,8 @@ extern int zpool_label_disk(libzfs_handle_t *, zpool_handle_t *, char *);
 extern int zpool_set_prop(zpool_handle_t *, const char *, const char *);
 extern int zpool_get_prop(zpool_handle_t *, zpool_prop_t, char *,
     size_t proplen, zprop_source_t *);
+extern int zpool_get_prop_literal(zpool_handle_t *, zpool_prop_t, char *,
+    size_t proplen, zprop_source_t *, boolean_t literal);
 extern uint64_t zpool_get_prop_int(zpool_handle_t *, zpool_prop_t,
     zprop_source_t *);
 
diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c
index e8e7efca5c08..8b3edec168d8 100644
--- a/lib/libzfs/libzfs_pool.c
+++ b/lib/libzfs/libzfs_pool.c
@@ -236,12 +236,22 @@ zpool_pool_state_to_name(pool_state_t state)
 }
 
 /*
- * Get a zpool property value for 'prop' and return the value in
- * a pre-allocated buffer.
+ * API compatibility wrapper around zpool_get_prop_literal
  */
 int
 zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
     zprop_source_t *srctype)
+{
+    return zpool_get_prop_literal(zhp, prop, buf, len, srctype, B_FALSE);
+}
+
+/*
+ * Get a zpool property value for 'prop' and return the value in
+ * a pre-allocated buffer.
+ */
+int
+zpool_get_prop_literal(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
+    zprop_source_t *srctype, boolean_t literal)
 {
 	uint64_t intval;
 	const char *strval;
@@ -308,7 +318,11 @@ zpool_get_prop(zpool_handle_t *zhp, zpool_prop_t prop, char *buf, size_t len,
 		case ZPOOL_PROP_FREEING:
 		case ZPOOL_PROP_EXPANDSZ:
 		case ZPOOL_PROP_ASHIFT:
-			(void) zfs_nicenum(intval, buf, len);
+			if (literal)
+				(void) snprintf(buf, len, "%llu",
+					(u_longlong_t)intval);
+			else
+				(void) zfs_nicenum(intval, buf, len);
 			break;
 
 		case ZPOOL_PROP_CAPACITY: