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From 137a29247f0989440ffbd42f7f56da154eb6003a Mon Sep 17 00:00:00 2001
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Message-Id: <137a29247f0989440ffbd42f7f56da154eb6003a@dist-git>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Wed, 10 Oct 2018 17:25:54 +0200
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Subject: [PATCH] virfiletst: Test virFileIsSharedFS
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RHEL-7.7: https://bugzilla.redhat.com/show_bug.cgi?id=1632711
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RHEL-8.0: https://bugzilla.redhat.com/show_bug.cgi?id=1634782
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RHEL-7.6.z: https://bugzilla.redhat.com/show_bug.cgi?id=1635705
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Introduce some basic test cases for virFileIsSharedFS(). More
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will be added later. In order to achieve desired result, mocks
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for setmntent() and statfs() need to be invented because the
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first thing that virFileIsSharedFS() does is calling the latter.
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If it finds a FUSE mount it'll call the former.
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The mock might look a bit complicated, but in fact it's quite
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simple. The test sets LIBVIRT_MTAB env variable to hold the
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absolute path to a file containing mount table. Then, statfs()
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returns matching FS it finds, and setmntent() is there just to
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replace /proc/mounts with the file the test wants to load.
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Adding this test also exposed a bug we have - because we assume
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the given path points to a file we cut off what we assume is a
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file name to obtain directory path and only then we call
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statfs(). This is buggy because the passed path could be already
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a mount point.
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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(cherry picked from commit a7b4eb7d261255d70d90047ae34e8eea849053f2)
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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tests/Makefile.am | 7 +-
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tests/virfiledata/mounts3.txt | 33 ++++++++
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tests/virfilemock.c | 154 ++++++++++++++++++++++++++++++++++
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tests/virfiletest.c | 62 +++++++++++++-
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4 files changed, 254 insertions(+), 2 deletions(-)
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create mode 100644 tests/virfiledata/mounts3.txt
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create mode 100644 tests/virfilemock.c
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diff --git a/tests/Makefile.am b/tests/Makefile.am
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index 41905d1a4d..c0337ea10c 100644
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--- a/tests/Makefile.am
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+++ b/tests/Makefile.am
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@@ -242,6 +242,7 @@ test_libraries += virusbmock.la \
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virnetdevbandwidthmock.la \
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virnumamock.la \
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virtestmock.la \
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+ virfilemock.la \
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$(NULL)
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endif WITH_LINUX
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@@ -1163,9 +1164,13 @@ virresctrltest_SOURCES = \
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virresctrltest.c testutils.h testutils.c virfilewrapper.h virfilewrapper.c
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virresctrltest_LDADD = $(LDADDS)
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+virfilemock_la_SOURCES = \
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+ virfilemock.c
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+virfilemock_la_LDFLAGS = $(MOCKLIBS_LDFLAGS)
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+virfilemock_la_LIBADD = $(MOCKLIBS_LIBS)
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else ! WITH_LINUX
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EXTRA_DIST += vircaps2xmltest.c virnumamock.c virfilewrapper.c \
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- virfilewrapper.h virresctrltest.c
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+ virfilewrapper.h virresctrltest.c virfilemock.c
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endif ! WITH_LINUX
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if WITH_NSS
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diff --git a/tests/virfiledata/mounts3.txt b/tests/virfiledata/mounts3.txt
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new file mode 100644
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index 0000000000..226f67dc00
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--- /dev/null
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+++ b/tests/virfiledata/mounts3.txt
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@@ -0,0 +1,33 @@
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+/dev/root / xfs rw,noatime,attr2,inode64,noquota 0 0
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+proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
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+tmpfs /run tmpfs rw,nodev,relatime,size=3281436k,mode=755 0 0
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+sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
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+dev /dev devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=4093060,mode=755 0 0
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+securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
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+debugfs /sys/kernel/debug debugfs rw,nosuid,nodev,noexec,relatime 0 0
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+mqueue /dev/mqueue mqueue rw,nosuid,nodev,noexec,relatime 0 0
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+configfs /sys/kernel/config configfs rw,nosuid,nodev,noexec,relatime 0 0
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+devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
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+fusectl /sys/fs/fuse/connections fusectl rw,nosuid,nodev,noexec,relatime 0 0
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+shm /dev/shm tmpfs rw,nosuid,nodev,noexec,relatime 0 0
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+cgroup_root /sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755 0 0
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+openrc /sys/fs/cgroup/openrc cgroup rw,nosuid,nodev,noexec,relatime,release_agent=/lib/rc/sh/cgroup-release-agent.sh,name=openrc 0 0
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+none /sys/fs/cgroup/unified cgroup2 rw,nosuid,nodev,noexec,relatime,nsdelegate 0 0
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+cpuset /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
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+cpu /sys/fs/cgroup/cpu cgroup rw,nosuid,nodev,noexec,relatime,cpu 0 0
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+cpuacct /sys/fs/cgroup/cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpuacct 0 0
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+blkio /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
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+memory /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
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+devices /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
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+freezer /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
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+net_cls /sys/fs/cgroup/net_cls cgroup rw,nosuid,nodev,noexec,relatime,net_cls 0 0
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+perf_event /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
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+net_prio /sys/fs/cgroup/net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_prio 0 0
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+hugetlb /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
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+pids /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
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+rdma /sys/fs/cgroup/rdma cgroup rw,nosuid,nodev,noexec,relatime,rdma 0 0
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+binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
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+hugetlbfs /hugepages2M hugetlbfs rw,relatime,mode=1777,pagesize=2M 0 0
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+none /run/user/1000 tmpfs rw,relatime,mode=700,uid=1000 0 0
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+host:/nfs /nfs nfs4 rw,relatime,vers=4.1,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp6,timeo=600,retrans=2,sec=sys,clientaddr=::,local_lock=none,addr=:: 0 0
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+dev /nfs/blah devtmpfs rw,nosuid,relatime,size=10240k,nr_inodes=4093060,mode=755 0 0
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diff --git a/tests/virfilemock.c b/tests/virfilemock.c
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new file mode 100644
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index 0000000000..822c757380
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--- /dev/null
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+++ b/tests/virfilemock.c
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@@ -0,0 +1,154 @@
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+/*
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+ * Copyright (C) 2018 Red Hat, Inc.
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+ *
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+ * This library is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * This library is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with this library. If not, see
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+ * <http://www.gnu.org/licenses/>.
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+ *
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+ * Author: Michal Privoznik <mprivozn@redhat.com>
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+ */
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+
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+#include <config.h>
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+
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+#include <stdio.h>
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+#include <mntent.h>
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+#include <sys/vfs.h>
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+#if HAVE_LINUX_MAGIC_H
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+# include <linux/magic.h>
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+#endif
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+
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+#include "virmock.h"
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+
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+#define VIR_FROM_THIS VIR_FROM_NONE
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+
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+static FILE *(*real_setmntent)(const char *filename, const char *type);
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+static int (*real_statfs)(const char *path, struct statfs *buf);
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+
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+
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+static void
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+init_syms(void)
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+{
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+ if (real_setmntent)
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+ return;
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+
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+ VIR_MOCK_REAL_INIT(setmntent);
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+ VIR_MOCK_REAL_INIT(statfs);
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+}
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+
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+
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+FILE *
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+setmntent(const char *filename, const char *type)
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+{
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+ const char *mtab;
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+
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+ init_syms();
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+
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+ if ((mtab = getenv("LIBVIRT_MTAB")))
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+ filename = mtab;
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+
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+ return real_setmntent(filename, type);
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+}
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+
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+
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+#ifndef NFS_SUPER_MAGIC
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+# define NFS_SUPER_MAGIC 0x6969
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+#endif
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+#ifndef OCFS2_SUPER_MAGIC
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+# define OCFS2_SUPER_MAGIC 0x7461636f
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+#endif
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+#ifndef GFS2_MAGIC
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+# define GFS2_MAGIC 0x01161970
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+#endif
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+#ifndef AFS_FS_MAGIC
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+# define AFS_FS_MAGIC 0x6B414653
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+#endif
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+#ifndef SMB_SUPER_MAGIC
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+# define SMB_SUPER_MAGIC 0x517B
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+#endif
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+#ifndef CIFS_SUPER_MAGIC
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+# define CIFS_SUPER_MAGIC 0xFF534D42
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+#endif
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+#ifndef HUGETLBFS_MAGIC
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+# define HUGETLBFS_MAGIC 0x958458f6
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+#endif
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+#ifndef FUSE_SUPER_MAGIC
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+# define FUSE_SUPER_MAGIC 0x65735546
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+#endif
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+
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+
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+static int
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+statfs_mock(const char *mtab,
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+ const char *path,
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+ struct statfs *buf)
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+{
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+ FILE *f;
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+ struct mntent mb;
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+ char mntbuf[1024];
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+ int ret = -1;
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+
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+ if (!(f = real_setmntent(mtab, "r"))) {
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+ fprintf(stderr, "Unable to open %s", mtab);
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+ return -1;
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+ }
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+
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+ while (getmntent_r(f, &mb, mntbuf, sizeof(mntbuf))) {
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+ int ftype;
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+
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+ if (STRNEQ(mb.mnt_dir, path))
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+ continue;
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+
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+ if (STREQ(mb.mnt_type, "nfs") ||
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+ STREQ(mb.mnt_type, "nfs4")) {
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+ ftype = NFS_SUPER_MAGIC;
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+ } else if (STREQ(mb.mnt_type, "gfs2")||
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+ STREQ(mb.mnt_type, "gfs2meta")) {
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+ ftype = GFS2_MAGIC;
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+ } else if (STREQ(mb.mnt_type, "ocfs2")) {
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+ ftype = OCFS2_SUPER_MAGIC;
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+ } else if (STREQ(mb.mnt_type, "afs")) {
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+ ftype = AFS_FS_MAGIC;
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+ } else if (STREQ(mb.mnt_type, "smb3")) {
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+ ftype = SMB_SUPER_MAGIC;
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+ } else if (STREQ(mb.mnt_type, "cifs")) {
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+ ftype = CIFS_SUPER_MAGIC;
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+ } else if (STRPREFIX(mb.mnt_type, "fuse")) {
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+ ftype = FUSE_SUPER_MAGIC;
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+ } else {
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+ /* Everything else is EXT4. We don't care really for other paths. */
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+ ftype = EXT4_SUPER_MAGIC;
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+ }
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+
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+ memset(buf, 0, sizeof(*buf));
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+ /* We only care about f_type so far. */
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+ buf->f_type = ftype;
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+ ret = 0;
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+ break;
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+ }
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+
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+ endmntent(f);
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+ return ret;
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+}
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+
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+
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+int
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+statfs(const char *path, struct statfs *buf)
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+{
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+ const char *mtab;
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+
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+ init_syms();
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+
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+ if ((mtab = getenv("LIBVIRT_MTAB")))
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+ return statfs_mock(mtab, path, buf);
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+
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+ return real_statfs(path, buf);
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+}
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diff --git a/tests/virfiletest.c b/tests/virfiletest.c
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index 790911cacb..85f22063fe 100644
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--- a/tests/virfiletest.c
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+++ b/tests/virfiletest.c
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@@ -31,6 +31,7 @@
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# include <linux/falloc.h>
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#endif
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+#define VIR_FROM_THIS VIR_FROM_NONE
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#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R
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static int testFileCheckMounts(const char *prefix,
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@@ -310,6 +311,48 @@ testFileInData(const void *opaque)
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}
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edecca |
|
|
|
edecca |
+struct testFileIsSharedFSType {
|
|
|
edecca |
+ const char *mtabFile;
|
|
|
edecca |
+ const char *filename;
|
|
|
edecca |
+ const bool expected;
|
|
|
edecca |
+};
|
|
|
edecca |
+
|
|
|
edecca |
+static int
|
|
|
edecca |
+testFileIsSharedFSType(const void *opaque ATTRIBUTE_UNUSED)
|
|
|
edecca |
+{
|
|
|
edecca |
+#ifndef __linux__
|
|
|
edecca |
+ return EXIT_AM_SKIP;
|
|
|
edecca |
+#else
|
|
|
edecca |
+ const struct testFileIsSharedFSType *data = opaque;
|
|
|
edecca |
+ char *mtabFile = NULL;
|
|
|
edecca |
+ bool actual;
|
|
|
edecca |
+ int ret = -1;
|
|
|
edecca |
+
|
|
|
edecca |
+ if (virAsprintf(&mtabFile, abs_srcdir "/virfiledata/%s", data->mtabFile) < 0)
|
|
|
edecca |
+ return -1;
|
|
|
edecca |
+
|
|
|
edecca |
+ if (setenv("LIBVIRT_MTAB", mtabFile, 1) < 0) {
|
|
|
edecca |
+ fprintf(stderr, "Unable to set env variable\n");
|
|
|
edecca |
+ goto cleanup;
|
|
|
edecca |
+ }
|
|
|
edecca |
+
|
|
|
edecca |
+ actual = virFileIsSharedFS(data->filename);
|
|
|
edecca |
+
|
|
|
edecca |
+ if (actual != data->expected) {
|
|
|
edecca |
+ fprintf(stderr, "Unexpected FS type. Expected %d got %d\n",
|
|
|
edecca |
+ data->expected, actual);
|
|
|
edecca |
+ goto cleanup;
|
|
|
edecca |
+ }
|
|
|
edecca |
+
|
|
|
edecca |
+ ret = 0;
|
|
|
edecca |
+ cleanup:
|
|
|
edecca |
+ VIR_FREE(mtabFile);
|
|
|
edecca |
+ unsetenv("LIBVIRT_MTAB");
|
|
|
edecca |
+ return ret;
|
|
|
edecca |
+#endif
|
|
|
edecca |
+}
|
|
|
edecca |
+
|
|
|
edecca |
+
|
|
|
edecca |
static int
|
|
|
edecca |
mymain(void)
|
|
|
edecca |
{
|
|
|
edecca |
@@ -397,7 +440,24 @@ mymain(void)
|
|
|
edecca |
DO_TEST_IN_DATA(true, 8, 16, 32, 64, 128, 256, 512);
|
|
|
edecca |
DO_TEST_IN_DATA(false, 8, 16, 32, 64, 128, 256, 512);
|
|
|
edecca |
}
|
|
|
edecca |
+
|
|
|
edecca |
+#define DO_TEST_FILE_IS_SHARED_FS_TYPE(mtab, file, exp) \
|
|
|
edecca |
+ do { \
|
|
|
edecca |
+ struct testFileIsSharedFSType data = { \
|
|
|
edecca |
+ .mtabFile = mtab, .filename = file, .expected = exp \
|
|
|
edecca |
+ }; \
|
|
|
edecca |
+ if (virTestRun(virTestCounterNext(), testFileIsSharedFSType, &data) < 0) \
|
|
|
edecca |
+ ret = -1; \
|
|
|
edecca |
+ } while (0)
|
|
|
edecca |
+
|
|
|
edecca |
+ virTestCounterReset("testFileIsSharedFSType ");
|
|
|
edecca |
+ DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts1.txt", "/boot/vmlinuz", false);
|
|
|
edecca |
+ DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts2.txt", "/run/user/501/gvfs/some/file", false);
|
|
|
edecca |
+ DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/nfs/file", true);
|
|
|
edecca |
+ /* TODO Detect bind mounts */
|
|
|
edecca |
+ DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/nfs/blah", true);
|
|
|
edecca |
+
|
|
|
edecca |
return ret != 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
|
edecca |
}
|
|
|
edecca |
|
|
|
edecca |
-VIR_TEST_MAIN(mymain)
|
|
|
edecca |
+VIR_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/virfilemock.so")
|
|
|
edecca |
--
|
|
|
edecca |
2.19.1
|
|
|
edecca |
|