util-linux/libmount-add-MNT_ERR_LOOPDEV.patch

From 82756a747e4bcfc13a27b7618d889af080649584 Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Mon, 28 May 2012 12:26:36 +0200
Subject: [PATCH] libmount: add MNT_ERR_LOOPDEV

Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Petr Uzel <petr.uzel@suse.cz>
---
 lib/loopdev.c                  |    4 ++++
 libmount/src/context_loopdev.c |    1 +
 libmount/src/libmount.h.in     |    1 +
 3 files changed, 6 insertions(+), 0 deletions(-)

Index: util-linux-2.21.2/lib/loopdev.c
===================================================================
--- util-linux-2.21.2.orig/lib/loopdev.c
+++ util-linux-2.21.2/lib/loopdev.c
@@ -173,6 +173,8 @@ int loopcxt_init(struct loopdev_cxt *lc,
  */
 void loopcxt_deinit(struct loopdev_cxt *lc)
 {
+	int errsv = errno;
+
 	if (!lc)
 		return;
 
@@ -183,6 +185,8 @@ void loopcxt_deinit(struct loopdev_cxt *
 
 	loopcxt_set_device(lc, NULL);
 	loopcxt_deinit_iterator(lc);
+
+	errno = errsv;
 }
 
 /*
Index: util-linux-2.21.2/libmount/src/context_loopdev.c
===================================================================
--- util-linux-2.21.2.orig/libmount/src/context_loopdev.c
+++ util-linux-2.21.2/libmount/src/context_loopdev.c
@@ -261,6 +261,7 @@ int mnt_context_setup_loopdev(struct lib
 
 		if (loopdev || rc != -EBUSY) {
 			DBG(CXT, mnt_debug_h(cxt, "failed to setup device"));
+			rc = -MNT_ERR_LOOPDEV;
 			goto done;
 		}
 		DBG(CXT, mnt_debug_h(cxt, "loopdev stolen...trying again"));
Index: util-linux-2.21.2/libmount/src/libmount.h.in
===================================================================
--- util-linux-2.21.2.orig/libmount/src/libmount.h.in
+++ util-linux-2.21.2/libmount/src/libmount.h.in
@@ -126,6 +126,7 @@ enum {
 #define MNT_ERR_NOFSTAB      5000	/* not found required entry in fstab */
 #define MNT_ERR_NOFSTYPE     5001	/* failed to detect filesystem type */
 #define MNT_ERR_NOSOURCE     5002	/* required mount source undefined */
+#define MNT_ERR_LOOPDEV	     5003	/* loopdev setup failed, errno set by libc */
 
 /* init.c */
 extern void mnt_init_debug(int mask);