3 files changed, 56 insertions, 84 deletions

diff --git a/Documentation/fault-injection/failcmd.sh b/Documentation/fault-injection/failcmd.sh
deleted file mode 100644
index 63177aba8106..000000000000
--- a/Documentation/fault-injection/failcmd.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-
-echo 1 > /proc/self/make-it-fail
-exec $*
diff --git a/Documentation/fault-injection/failmodule.sh b/Documentation/fault-injection/failmodule.sh
deleted file mode 100644
index 474a8b971f9c..000000000000
--- a/Documentation/fault-injection/failmodule.sh
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/bin/bash
-#
-# Usage: failmodule <failname> <modulename> [stacktrace-depth]
-#
-#       <failname>: "failslab", "fail_alloc_page", or "fail_make_request"
-#
-#       <modulename>: module name that you want to inject faults.
-#
-#       [stacktrace-depth]: the maximum number of stacktrace walking allowed
-#
-
-STACKTRACE_DEPTH=5
-if [ $# -gt 2 ]; then
-        STACKTRACE_DEPTH=$3
-fi
-
-if [ ! -d /debug/$1 ]; then
-        echo "Fault-injection $1 does not exist" >&2
-        exit 1
-fi
-if [ ! -d /sys/module/$2 ]; then
-        echo "Module $2 does not exist" >&2
-        exit 1
-fi
-
-# Disable any fault injection
-echo 0 > /debug/$1/stacktrace-depth
-
-echo `cat /sys/module/$2/sections/.text` > /debug/$1/require-start
-echo `cat /sys/module/$2/sections/.exit.text` > /debug/$1/require-end
-echo $STACKTRACE_DEPTH > /debug/$1/stacktrace-depth
diff --git a/Documentation/fault-injection/fault-injection.txt b/Documentation/fault-injection/fault-injection.txt
index 36ece095ff17..4bc374a14345 100644
--- a/Documentation/fault-injection/fault-injection.txt
+++ b/Documentation/fault-injection/fault-injection.txt
@@ -161,70 +161,77 @@ o add a hook to insert failures
 Application Examples
 --------------------
 
-o inject slab allocation failures into module init/cleanup code
+o Inject slab allocation failures into module init/exit code
 
-------------------------------------------------------------------------------
 #!/bin/bash
 
-FAILCMD=Documentation/fault-injection/failcmd.sh
-BLACKLIST="root_plug evbug"
-
-FAILNAME=failslab
-echo Y > /debug/$FAILNAME/task-filter
-echo 10 > /debug/$FAILNAME/probability
-echo 100 > /debug/$FAILNAME/interval
-echo -1 > /debug/$FAILNAME/times
-echo 2 > /debug/$FAILNAME/verbose
-echo 1 > /debug/$FAILNAME/ignore-gfp-wait
+FAILTYPE=failslab
+echo Y > /debug/$FAILTYPE/task-filter
+echo 10 > /debug/$FAILTYPE/probability
+echo 100 > /debug/$FAILTYPE/interval
+echo -1 > /debug/$FAILTYPE/times
+echo 0 > /debug/$FAILTYPE/space
+echo 2 > /debug/$FAILTYPE/verbose
+echo 1 > /debug/$FAILTYPE/ignore-gfp-wait
 
-blacklist()
+faulty_system()
 {
-        echo $BLACKLIST | grep $1 > /dev/null 2>&1
+        bash -c "echo 1 > /proc/self/make-it-fail && exec $*"
 }
 
-oops()
-{
-        dmesg | grep BUG > /dev/null 2>&1
-}
+if [ $# -eq 0 ]
+then
+        echo "Usage: $0 modulename [ modulename ... ]"
+        exit 1
+fi
+
+for m in $*
+do
+        echo inserting $m...
+        faulty_system modprobe $m
 
-find /lib/modules/`uname -r` -name '*.ko' -exec basename {} .ko \; |
-        while read i
-        do
-                oops && exit 1
-
-                if ! blacklist $i
-                then
-                        echo inserting $i...
-                        bash $FAILCMD modprobe $i
-                fi
-        done
-
-lsmod | awk '{ if ($3 == 0) { print $1 } }' |
-        while read i
-        do
-                oops && exit 1
-
-                if ! blacklist $i
-                then
-                        echo removing $i...
-                        bash $FAILCMD modprobe -r $i
-                fi
-        done
+        echo removing $m...
+        faulty_system modprobe -r $m
+done
 
 ------------------------------------------------------------------------------
 
-o inject slab allocation failures only for a specific module
+o Inject page allocation failures only for a specific module
 
-------------------------------------------------------------------------------
 #!/bin/bash
 
-FAILMOD=Documentation/fault-injection/failmodule.sh
+FAILTYPE=fail_page_alloc
+module=$1
 
-echo injecting errors into the module $1...
+if [ -z $module ]
+then
+        echo "Usage: $0 <modulename>"
+        exit 1
+fi
 
-modprobe $1
-bash $FAILMOD failslab $1 10
-echo 25 > /debug/failslab/probability
+modprobe $module
 
-------------------------------------------------------------------------------
+if [ ! -d /sys/module/$module/sections ]
+then
+        echo Module $module is not loaded
+        exit 1
+fi
+
+cat /sys/module/$module/sections/.text > /debug/$FAILTYPE/require-start
+cat /sys/module/$module/sections/.data > /debug/$FAILTYPE/require-end
+
+echo N > /debug/$FAILTYPE/task-filter
+echo 10 > /debug/$FAILTYPE/probability
+echo 100 > /debug/$FAILTYPE/interval
+echo -1 > /debug/$FAILTYPE/times
+echo 0 > /debug/$FAILTYPE/space
+echo 2 > /debug/$FAILTYPE/verbose
+echo 1 > /debug/$FAILTYPE/ignore-gfp-wait
+echo 1 > /debug/$FAILTYPE/ignore-gfp-highmem
+echo 10 > /debug/$FAILTYPE/stacktrace-depth
+
+trap "echo 0 > /debug/$FAILTYPE/probability" SIGINT SIGTERM EXIT
+
+echo "Injecting errors into the module $module... (interrupt to stop)"
+sleep 1000000