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From 3f420a49dd4d0c413b635dd621aa34eebce2d3d2 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Mon, 5 Aug 2013 13:58:01 +0200
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Subject: [PATCH] libmount: canonicalize for conversion from loopdev backing
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file
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# mount foo.img /mnt
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# umount foo.img
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umount: foo.img: not mounted
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The loopdev code (and sysfs backing_file) uses absolute paths, but
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libmount does not canonicalize the path before lookup for the backing file.
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References: https://bugzilla.redhat.com/show_bug.cgi?id=950497
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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libmount/src/context_umount.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/libmount/src/context_umount.c b/libmount/src/context_umount.c
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index 2b791c4..b02902c 100644
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--- a/libmount/src/context_umount.c
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+++ b/libmount/src/context_umount.c
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@@ -161,7 +161,12 @@ try_loopdev:
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struct stat st;
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if (stat(tgt, &st) == 0 && S_ISREG(st.st_mode)) {
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- int count = loopdev_count_by_backing_file(tgt, &loopdev);
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+ int count;
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+
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+ cn_tgt = mnt_resolve_path(tgt, cache);
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+ count = loopdev_count_by_backing_file(cn_tgt, &loopdev);
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+ if (!cache)
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+ free(cn_tgt);
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if (count == 1) {
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DBG(CXT, mnt_debug_h(cxt,
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"umount: %s --> %s (retry)", tgt, loopdev));
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--
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1.8.1.4
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