getcwd(2) may return "/" instead of the correct cwd on buggy kernel.
Regression test for:
ede4ceb prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
f650080 __dentry_path() fixes
Cc: Artem Savkov <asavkov@xxxxxxxxxx>
Cc: Jan Stancek <jstancek@xxxxxxxxxx>
Signed-off-by: Eryu Guan <eguan@xxxxxxxxxx>
---
This case was originally written by Artem Savkov and I made minor
updates and ported it to xfstests.
.gitignore | 1 +
src/Makefile | 2 +-
src/t_getcwd.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/028 | 54 +++++++++++++++++++++++++++++++
tests/generic/028.out | 2 ++
tests/generic/group | 1 +
6 files changed, 149 insertions(+), 1 deletion(-)
create mode 100644 src/t_getcwd.c
create mode 100755 tests/generic/028
create mode 100644 tests/generic/028.out
diff --git a/.gitignore b/.gitignore
index 66e6ee8..5353439 100644
--- a/.gitignore
+++ b/.gitignore
@@ -83,6 +83,7 @@
/src/t_dir_offset
/src/t_dir_offset2
/src/t_futimens
+/src/t_getcwd
/src/t_holes
/src/t_immutable
/src/t_mmap_writev
diff --git a/src/Makefile b/src/Makefile
index d754048..7a7984a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -19,7 +19,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \
bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \
stale_handle pwrite_mmap_blocked t_dir_offset2 seek_sanity_test \
seek_copy_test t_readdir_1 t_readdir_2 fsync-tester nsexec cloner \
- renameat2
+ renameat2 t_getcwd
SUBDIRS =
diff --git a/src/t_getcwd.c b/src/t_getcwd.c
new file mode 100644
index 0000000..891de75
--- /dev/null
+++ b/src/t_getcwd.c
@@ -0,0 +1,90 @@
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define TIMEOUT 60
+#define BUF_SIZE 256
+
+static sig_atomic_t end;
+
+void test_getcwd(char *init_cwd)
+{
+ int i = 0;
+ char cur_cwd[BUF_SIZE];
+ while (!end) {
+ getcwd(cur_cwd, BUF_SIZE);
+ if (strncmp(init_cwd, cur_cwd, BUF_SIZE)) {
+ printf("[%u] %s != %s\n", i, init_cwd, cur_cwd);
+ break;
+ }
+ i++;
+ }
+}
+
+void do_rename(char *prefix)
+{
+ int i = 0;
+ int fd;
+ char c_name[BUF_SIZE];
+ char n_name[BUF_SIZE];
+
+ strncpy(c_name, prefix, BUF_SIZE);
+
+ fd = open(c_name, O_CREAT | O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "failed to create file %s: %s\n",
+ c_name, strerror(errno));
+ exit(1);
+ }
+ close(fd);
+
+ while (1) {
+ i++;
+ snprintf(n_name, BUF_SIZE, "%s%u", prefix, i);
+ rename(c_name, n_name);
+ strncpy(c_name, n_name, BUF_SIZE);
+ }
+}
+
+void sigproc(int sig)
+{
+ end = 1;
+}
+
+int main(int argc, char *argv[])
+{
+ char init_cwd[BUF_SIZE];
+ pid_t pid;
+ int status;
+ int ret = 1;
+
+ getcwd(init_cwd, BUF_SIZE);
+
+ if (signal(SIGALRM, sigproc) == SIG_ERR) {
+ perror("signal failed");
+ exit(1);
+ }
+
+ alarm(TIMEOUT);
+
+ pid = fork();
+ if (pid < 0) {
+ perror("fork failed");
+ exit(1);
+ } else if (pid == 0) {
+ do_rename("testfile");
+ } else {
+ test_getcwd(init_cwd);
+ ret = !end;
+ kill(pid, SIGTERM);
+ waitpid(pid, &status, 0);
+ }
+
+ exit(ret);
+}
diff --git a/tests/generic/028 b/tests/generic/028
new file mode 100755
index 0000000..12216df
--- /dev/null
+++ b/tests/generic/028
@@ -0,0 +1,54 @@
+#! /bin/bash
+# FS QA Test No. generic/028
+#
+# Regression test for
+# ede4ceb prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts
+# f650080 __dentry_path() fixes
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2014 Red Hat Inc. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+
+rm -f $seqres.full
+echo "Silence is golden"
+
+$here/src/t_getcwd
+status=$?
+exit
diff --git a/tests/generic/028.out b/tests/generic/028.out
new file mode 100644
index 0000000..2615f73
--- /dev/null
+++ b/tests/generic/028.out
@@ -0,0 +1,2 @@
+QA output created by 028
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index e851c62..8f4b491 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -30,6 +30,7 @@
025 auto quick
026 acl quick auto
027 auto enospc
+028 auto
053 acl repair auto quick
062 attr udf auto quick
068 other auto freeze dangerous stress
--
1.9.3
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