Various zimport.sh fixes

1) $SPLSRC and $SRCDIR should be changed to $SRC_DIR.  These are
   vestiges of an earlier version of the script and were missed when
   it was updated.  Additionally ensure the directory is created.

2) The 'fail' function should take an integer argument for the
   error code to return.  Otherwise 0 (success) will be mistakenly
   returned and errors will we incorrectly suppressed.  The error
   code should be meaningful enough to determine where the script
   failed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

scripts/zimport.sh

@@ -233,30 +233,30 @@ pool_create() {
 		cd $POOL_DIR_SRC
 	fi
 
-	$ZFS_SH zfs="spa_config_path=$POOL_DIR_PRISTINE" || fail
+	$ZFS_SH zfs="spa_config_path=$POOL_DIR_PRISTINE" || fail 1
 
 	# Create a file vdev RAIDZ pool.
 	FILEDIR="$POOL_DIR_PRISTINE" $ZPOOL_CREATE \
-	    -c file-raidz -p $POOL_TAG -v >/dev/null || fail
+	    -c file-raidz -p $POOL_TAG -v >/dev/null || fail 2
 
 	# Create a pool/fs filesystem with some random contents.
-	$ZFS_CMD create $POOL_TAG/fs || fail
+	$ZFS_CMD create $POOL_TAG/fs || fail 3
 	populate /$POOL_TAG/fs/ 10 100
 
 	# Snapshot that filesystem, clone it, remove the files/dirs,
 	# replace them with new files/dirs.
-	$ZFS_CMD snap $POOL_TAG/fs@snap || fail
-	$ZFS_CMD clone $POOL_TAG/fs@snap $POOL_TAG/clone || fail
-	rm -Rf /$POOL_TAG/clone/* || fail
+	$ZFS_CMD snap $POOL_TAG/fs@snap || fail 4
+	$ZFS_CMD clone $POOL_TAG/fs@snap $POOL_TAG/clone || fail 5
+	rm -Rf /$POOL_TAG/clone/* || fail 6
 	populate /$POOL_TAG/clone/ 10 100
 
 	# Scrub the pool, delay slightly, then export it.  It is now
 	# somewhat interesting for testing purposes.
-	$ZPOOL_CMD scrub $POOL_TAG || fail
+	$ZPOOL_CMD scrub $POOL_TAG || fail 7
 	sleep 10
-	$ZPOOL_CMD export $POOL_TAG || fail
+	$ZPOOL_CMD export $POOL_TAG || fail 8
 
-	$ZFS_SH -u || fail
+	$ZFS_SH -u || fail 9
 }
 
 # If the zfs-images directory doesn't exist fetch a copy from Github then
@@ -265,7 +265,7 @@ if [ ! -d $IMAGES_DIR ]; then
 	IMAGES_DIR="$TEST_DIR/zfs-images"
 	mkdir -p $IMAGES_DIR
 	curl -sL $IMAGES_TAR | \
-	    tar -xz -C $IMAGES_DIR --strip-components=1 || fail
+	    tar -xz -C $IMAGES_DIR --strip-components=1 || fail 10
 fi
 
 # Given the available images in the zfs-images directory substitute the
@@ -297,6 +297,10 @@ if [ ! -d $TEST_DIR ]; then
 	mkdir -p $TEST_DIR
 fi
 
+if [ ! -d $SRC_DIR ]; then
+	mkdir -p $SRC_DIR
+fi
+
 # Print a header for all tags which are being tested.
 echo "--------------------- ZFS on Linux Source Versions --------------"
 printf "%-16s" " "
@@ -330,7 +334,7 @@ for TAG in $SRC_TAGS; do
 	elif  [ "$SPL_TAG" = "installed" ]; then
 		skip_nonewline
 	else
-		cd $SPLSRC
+		cd $SRC_DIR
 
 		if [ ! -d $SRC_DIR_SPL ]; then
 			mkdir -p $SRC_DIR_SPL
@@ -344,9 +348,9 @@ for TAG in $SRC_TAGS; do
 			rm $SRC_DIR_SPL/$SPL_TAG.tar
 			echo -n -e "${COLOR_GREEN}Local${COLOR_RESET}\t\t"
 		else
-			mkdir -p $SPL_DIR || fail
+			mkdir -p $SPL_DIR || fail 1
 			curl -sL $SPL_URL | tar -xz -C $SPL_DIR \
-			    --strip-components=1 || fail
+			    --strip-components=1 || fail 2
 			echo -n -e "${COLOR_GREEN}Remote${COLOR_RESET}\t\t"
 		fi
 	fi
@@ -366,7 +370,7 @@ for TAG in $SRC_TAGS; do
 	elif  [ "$ZFS_TAG" = "installed" ]; then
 		skip_nonewline
 	else
-		cd $SRCDIR
+		cd $SRC_DIR
 
 		if [ ! -d $SRC_DIR_ZFS ]; then
 			mkdir -p $SRC_DIR_ZFS
@@ -380,9 +384,9 @@ for TAG in $SRC_TAGS; do
 			rm $SRC_DIR_ZFS/$ZFS_TAG.tar
 			echo -n -e "${COLOR_GREEN}Local${COLOR_RESET}\t\t"
 		else
-			mkdir -p $ZFS_DIR || fail
+			mkdir -p $ZFS_DIR || fail 1
 			curl -sL $ZFS_URL | tar -xz -C $ZFS_DIR \
-			    --strip-components=1 || fail
+			    --strip-components=1 || fail 2
 			echo -n -e "${COLOR_GREEN}Remote${COLOR_RESET}\t\t"
 		fi
 	fi
@@ -401,9 +405,9 @@ for TAG in $SRC_TAGS; do
 	else
 		cd $SPL_DIR
 		make distclean &>/dev/null
-		sh ./autogen.sh &>/dev/null || fail
-		./configure &>/dev/null || fail
-		make -s -j$CPUS &>/dev/null || fail
+		sh ./autogen.sh &>/dev/null || fail 1
+		./configure &>/dev/null || fail 2
+		make -s -j$CPUS &>/dev/null || fail 3
 		pass_nonewline
 	fi
 done
@@ -421,9 +425,9 @@ for TAG in $SRC_TAGS; do
 	else
 		cd $ZFS_DIR
 		make distclean &>/dev/null
-		sh ./autogen.sh &>/dev/null || fail
-		./configure --with-spl=$SPL_DIR &>/dev/null || fail
-		make -s -j$CPUS &>/dev/null || fail
+		sh ./autogen.sh &>/dev/null || fail 1
+		./configure --with-spl=$SPL_DIR &>/dev/null || fail 2
+		make -s -j$CPUS &>/dev/null || fail 3
 		pass_nonewline
 	fi
 done
@@ -443,7 +447,7 @@ for TAG in $POOL_TAGS; do
 	# Use the existing compressed image if available.
 	if [ -f $POOL_BZIP ]; then
 		tar -xjf $POOL_BZIP -C $POOL_DIR_PRISTINE \
-		    --strip-components=1 || fail
+		    --strip-components=1 || fail 1
 	# Use the installed version to create the pool.
 	elif  [ "$TAG" = "installed" ]; then
 		pool_create $TAG
@@ -468,7 +472,8 @@ for TAG in $POOL_TAGS; do
 		fi
 		$ZFS_SH zfs="spa_config_path=$POOL_DIR_COPY"
 
-		cp -a --sparse=always $POOL_DIR_PRISTINE $POOL_DIR_COPY || fail
+		cp -a --sparse=always $POOL_DIR_PRISTINE \
+		    $POOL_DIR_COPY || fail 2
 		POOL_NAME=`$ZPOOL_CMD import -d $POOL_DIR_COPY | \
 		    awk '/pool:/ { print $2; exit 0 }'`
 
@@ -477,13 +482,13 @@ for TAG in $POOL_TAGS; do
 			fail_nonewline
 			ERROR=1
 		else
-			$ZPOOL_CMD export $POOL_NAME || fail
+			$ZPOOL_CMD export $POOL_NAME || fail 3
 			pass_nonewline
 		fi
 
 		rm -Rf $POOL_DIR_COPY
 
-		$ZFS_SH -u || fail
+		$ZFS_SH -u || fail 4
 	done
 	printf "\n"
 done