storage/posix: do not dereference gfid symlinks before posix_handle_mkdir_hashes()

Whenever a new directory is created, its corresponding gfid file must
also be created. This was done first calling MAKE_HANDLE_PATH() to get
the path of the gfid file, then calling posix_handle_mkdir_hashes() to
create the parent directories of the gfid, and finally creating the
soft-link.

In normal circumstances, the gfid we want to create won't exist and
MAKE_HANDLE_PATH() will return a simple path to the new gfid. However if
the volume is damaged and a self-heal is running, it is possible that we
try to create an already existing gfid. In this case, MAKE_HANDLE_PATH()
will return a path to the directory instead of the path to the gfid.

To solve this problem, every time a path to a gfid is needed, a call to
MAKE_HANDLE_ABSPATH() is made instead of the call to MAKE_HANDLE_PATH().

Change-Id: Ic319cc38c170434db8e86e2f89f0b8c28c0d611a
BUG: 859581
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/5075
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/bugs/bug-859581.t b/tests/bugs/bug-859581.t
new file mode 100755
index 00000000000..f31e8b311ef
--- /dev/null
+++ b/tests/bugs/bug-859581.t
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{1,2}
+EXPECT 'Created' volinfo_field $V0 'Status';
+TEST $CLI volume start $V0
+EXPECT 'Started' volinfo_field $V0 'Status';
+# Needed to be sure self-heal daemon is running
+sleep 5
+
+TEST glusterfs --entry-timeout=0 --attribute-timeout=0 -s $H0 --volfile-id $V0 $M0;
+
+mkdir -p $M0/dir1/dir2
+
+TEST rm -f $(gf_get_gfid_backend_file_path $B0/${V0}1 "dir1")
+TEST rmdir $B0/${V0}1/dir1/dir2
+
+TEST $CLI volume heal $V0 full
+sleep 5
+
+TEST [ -d $B0/${V0}1/dir1/dir2 ]
+TEST [ ! -d $(gf_get_gfid_backend_file_path $B0/${V0}1 "dir1") ]
+
+# Stop the volume to flush caches and force symlink recreation
+TEST umount $M0
+TEST $CLI volume stop $V0
+EXPECT 'Stopped' volinfo_field $V0 'Status';
+TEST $CLI volume start $V0
+EXPECT 'Started' volinfo_field $V0 'Status';
+TEST glusterfs --entry-timeout=0 --attribute-timeout=0 -s $H0 --volfile-id $V0 $M0;
+
+ls -l $M0/
+
+TEST [ -h $(gf_get_gfid_backend_file_path $B0/${V0}1 "dir1") ]
+
+TEST umount $M0
+TEST $CLI volume stop $V0
+TEST $CLI volume delete $V0
+
+cleanup
+