linux-hardening - [PATCH v4 4/4] tools/testing: adjust pstore backend related selftest

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Message-Id: <20240308031656.9672-5-xiangzao@linux.alibaba.com>
Date: Fri,  8 Mar 2024 11:16:56 +0800
From: Yuanhe Shu <xiangzao@...ux.alibaba.com>
To: keescook@...omium.org,
	tony.luck@...el.com,
	gpiccoli@...lia.com,
	shuah@...nel.org,
	corbet@....net
Cc: xlpang@...ux.alibaba.com,
	linux-kernel@...r.kernel.org,
	xiangzao@...ux.alibaba.com,
	yixingrui@...ux.alibaba.com,
	linux-doc@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Subject: [PATCH v4 4/4] tools/testing: adjust pstore backend related selftest

Pstore now supports multiple backends, the module parameter
pstore.backend varies from 'registered backend' to 'backends that are
allowed to register' and a new entry /sys/module/pstore/loaded_backend
is added to show which pstore backends are loaded at present. Adjust
selftests to match the change.

Signed-off-by: Yuanhe Shu <xiangzao@...ux.alibaba.com>
---
 tools/testing/selftests/pstore/common_tests   |  8 +--
 .../selftests/pstore/pstore_post_reboot_tests | 67 ++++++++++---------
 tools/testing/selftests/pstore/pstore_tests   |  2 +-
 3 files changed, 40 insertions(+), 37 deletions(-)

diff --git a/tools/testing/selftests/pstore/common_tests b/tools/testing/selftests/pstore/common_tests
index 4509f0cc9c91..db717f656a73 100755
--- a/tools/testing/selftests/pstore/common_tests
+++ b/tools/testing/selftests/pstore/common_tests
@@ -27,9 +27,9 @@ show_result() { # result_value
 }
 
 check_files_exist() { # type of pstorefs file
-    if [ -e ${1}-${backend}-0 ]; then
+    if [ -e ${1}-${2}-0 ]; then
 	prlog "ok"
-	for f in `ls ${1}-${backend}-*`; do
+	for f in `ls ${1}-${2}-*`; do
             prlog -e "\t${f}"
 	done
     else
@@ -74,9 +74,9 @@ prlog "=== Pstore unit tests (`basename $0`) ==="
 prlog "UUID="$UUID
 
 prlog -n "Checking pstore backend is registered ... "
-backend=`cat /sys/module/pstore/parameters/backend`
+backends=`cat /sys/module/pstore/loaded_backend`
 show_result $?
-prlog -e "\tbackend=${backend}"
+prlog -e "\tbackends=${backends}"
 prlog -e "\tcmdline=`cat /proc/cmdline`"
 if [ $rc -ne 0 ]; then
     exit 1
diff --git a/tools/testing/selftests/pstore/pstore_post_reboot_tests b/tools/testing/selftests/pstore/pstore_post_reboot_tests
index d6da5e86efbf..666b45bd7b87 100755
--- a/tools/testing/selftests/pstore/pstore_post_reboot_tests
+++ b/tools/testing/selftests/pstore/pstore_post_reboot_tests
@@ -35,46 +35,49 @@ else
     fi
 fi
 
+IFS=','
 cd ${mount_point}
+for backend in ${backends}; do
+    prlog -n "Checking ${backend}-dmesg files exist in pstore filesystem ... "
+    check_files_exist dmesg ${backend}
 
-prlog -n "Checking dmesg files exist in pstore filesystem ... "
-check_files_exist dmesg
+    prlog -n "Checking ${backend}-console files exist in pstore filesystem ... "
+    check_files_exist console ${backend}
 
-prlog -n "Checking console files exist in pstore filesystem ... "
-check_files_exist console
+    prlog -n "Checking ${backend}-pmsg files exist in pstore filesystem ... "
+    check_files_exist pmsg ${backend}
 
-prlog -n "Checking pmsg files exist in pstore filesystem ... "
-check_files_exist pmsg
+    prlog -n "Checking ${backend}-dmesg files contain oops end marker"
+    grep_end_trace() {
+        grep -q "\---\[ end trace" $1
+    }
+    files=`ls dmesg-${backend}-*`
+    operate_files $? "$files" grep_end_trace
 
-prlog -n "Checking dmesg files contain oops end marker"
-grep_end_trace() {
-    grep -q "\---\[ end trace" $1
-}
-files=`ls dmesg-${backend}-*`
-operate_files $? "$files" grep_end_trace
+    prlog -n "Checking ${backend}-console file contains oops end marker ... "
+    grep -q "\---\[ end trace" console-${backend}-0
+    show_result $?
 
-prlog -n "Checking console file contains oops end marker ... "
-grep -q "\---\[ end trace" console-${backend}-0
-show_result $?
-
-prlog -n "Checking pmsg file properly keeps the content written before crash ... "
-prev_uuid=`cat $TOP_DIR/prev_uuid`
-if [ $? -eq 0 ]; then
-    nr_matched=`grep -c "$TEST_STRING_PATTERN" pmsg-${backend}-0`
-    if [ $nr_matched -eq 1 ]; then
-	grep -q "$TEST_STRING_PATTERN"$prev_uuid pmsg-${backend}-0
-	show_result $?
+    prlog -n "Checking ${backend}-pmsg file properly keeps the content written before crash ... "
+    prev_uuid=`cat $TOP_DIR/prev_uuid`
+    if [ $? -eq 0 ]; then
+        nr_matched=`grep -c "$TEST_STRING_PATTERN" pmsg-${backend}-0`
+        if [ $nr_matched -eq 1 ]; then
+	    grep -q "$TEST_STRING_PATTERN"$prev_uuid pmsg-${backend}-0
+	    show_result $?
+        else
+            prlog "FAIL"
+            rc=1
+        fi
     else
-	prlog "FAIL"
-	rc=1
+        prlog "FAIL"
+        rc=1
     fi
-else
-    prlog "FAIL"
-    rc=1
-fi
 
-prlog -n "Removing all files in pstore filesystem "
-files=`ls *-${backend}-*`
-operate_files $? "$files" rm
+    prlog -n "Removing all ${backend} files in pstore filesystem "
+    files=`ls *-${backend}-*`
+    operate_files $? "$files" rm
+done
+unset IFS
 
 exit $rc
diff --git a/tools/testing/selftests/pstore/pstore_tests b/tools/testing/selftests/pstore/pstore_tests
index 2aa9a3852a84..f4665a8c77dc 100755
--- a/tools/testing/selftests/pstore/pstore_tests
+++ b/tools/testing/selftests/pstore/pstore_tests
@@ -10,7 +10,7 @@
 . ./common_tests
 
 prlog -n "Checking pstore console is registered ... "
-dmesg | grep -Eq "console \[(pstore|${backend})"
+dmesg | grep -Eq "console \[(pstore console)"
 show_result $?
 
 prlog -n "Checking /dev/pmsg0 exists ... "
-- 
2.39.3