ZTS: Fix import_cache_device_replaced

Allow the 'zpool replace' to run slowly without overwhelming the vdev
queues by setting zfs_scan_vdev_limit=128k.  This limits the number of
concurrent slow IOs which need to be handled.  The net effect is the
test case runs approximately 3x faster putting it well under the 10
minute per-test time limit.

Rename import_cache* test cases to imprt_cachefile*.  Originally
these were renamed due to a maximum tar name limit, this limit was
removed by commit 1dfde3d9b.

Replaced instances of /var/tmp in zpool_import.cfg with $TEST_BASE_DIR.

Reviewed-by: bunder2015 <omfgbunder@gmail.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7765 
Closes #7802

tests/runfiles/linux.run

@@ -363,12 +363,12 @@ tests = ['zpool_import_001_pos', 'zpool_import_002_pos',
     'zpool_import_rename_001_pos', 'zpool_import_all_001_pos',
     'zpool_import_encrypted', 'zpool_import_encrypted_load',
     'zpool_import_errata3',
-    'import_cache_device_added',
-    'import_cache_device_removed',
-    'import_cache_device_replaced',
-    'import_cache_mirror_attached',
-    'import_cache_mirror_detached',
-    'import_cache_shared_device',
+    'import_cachefile_device_added',
+    'import_cachefile_device_removed',
+    'import_cachefile_device_replaced',
+    'import_cachefile_mirror_attached',
+    'import_cachefile_mirror_detached',
+    'import_cachefile_shared_device',
     'import_devices_missing',
     'import_paths_changed',
     'import_rewind_config_changed',

tests/test-runner/bin/zts-report.py

@@ -231,7 +231,6 @@ maybe = {
         ['FAIL', rewind_reason],
     'cli_root/zpool_import/import_rewind_config_changed':
         ['FAIL', rewind_reason],
-    'cli_root/zpool_import/import_cache_device_replaced': ['FAIL', '7765'],
     'cli_root/zpool_import/zpool_import_missing_003_pos': ['SKIP', '6839'],
     'cli_root/zpool_remove/setup': ['SKIP', disk_reason],
     'cli_root/zpool_upgrade/zpool_upgrade_004_pos': ['FAIL', '6141'],

tests/zfs-tests/tests/functional/cli_root/zpool_import/Makefile.am

@@ -4,12 +4,12 @@ pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/cli_root/zpool_impo
 dist_pkgdata_SCRIPTS = \
 	setup.ksh \
 	cleanup.ksh \
-	import_cache_device_added.ksh \
-	import_cache_device_removed.ksh \
-	import_cache_device_replaced.ksh \
-	import_cache_mirror_attached.ksh \
-	import_cache_mirror_detached.ksh \
-	import_cache_shared_device.ksh \
+	import_cachefile_device_added.ksh \
+	import_cachefile_device_removed.ksh \
+	import_cachefile_device_replaced.ksh \
+	import_cachefile_mirror_attached.ksh \
+	import_cachefile_mirror_detached.ksh \
+	import_cachefile_shared_device.ksh \
 	import_devices_missing.ksh \
 	import_paths_changed.ksh \
 	import_rewind_config_changed.ksh \

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cachefile_device_replaced.ksh

@@ -60,6 +60,7 @@ function custom_cleanup
 	    log_must set_zfs_txg_timeout $ZFS_TXG_TIMEOUT
 
 	zinject -c all
+	log_must set_tunable64 zfs_scan_vdev_limit $ZFS_SCAN_VDEV_LIMIT_DEFAULT
 	cleanup
 }
 
@@ -87,9 +88,10 @@ function test_replacing_vdevs
 	log_must zpool export $TESTPOOL1
 	log_must cp $CPATHBKP $CPATH
 	log_must zpool import -c $CPATH -o cachefile=$CPATH $TESTPOOL1
+	log_must set_tunable64 zfs_scan_vdev_limit $ZFS_SCAN_VDEV_LIMIT_SLOW
 	typeset device
 	for device in $zinjectdevices ; do
-		log_must zinject -d $device -D 200:1 $TESTPOOL1 > /dev/null
+		log_must zinject -d $device -D 50:1 $TESTPOOL1 > /dev/null
 	done
 	log_must zpool replace $TESTPOOL1 $replacevdev $replaceby
 
@@ -102,6 +104,7 @@ function test_replacing_vdevs
 	# Confirm pool is still replacing
 	log_must pool_is_replacing $TESTPOOL1
 	log_must zinject -c all > /dev/null
+	log_must set_tunable64 zfs_scan_vdev_limit $ZFS_SCAN_VDEV_LIMIT_DEFAULT
 	log_must zpool export $TESTPOOL1
 
 	( $earlyremove ) && log_must rm $replacevdev

tests/zfs-tests/tests/functional/cli_root/zpool_import/zpool_import.cfg

@@ -117,11 +117,11 @@ export DEVICE_FILE=disk
 export DEVICE_ARCHIVE=archive_import-test
 export MYTESTFILE=$STF_SUITE/include/libtest.shlib
 
-export CPATH=/var/tmp/cachefile.$$
-export CPATHBKP=/var/tmp/cachefile.$$.bkp
-export CPATHBKP2=/var/tmp/cachefile.$$.bkp2
-export MD5FILE=/var/tmp/md5sums.$$
-export MD5FILE2=/var/tmp/md5sums.$$.2
+export CPATH=$TEST_BASE_DIR/cachefile.$$
+export CPATHBKP=$TEST_BASE_DIR/cachefile.$$.bkp
+export CPATHBKP2=$TEST_BASE_DIR/cachefile.$$.bkp2
+export MD5FILE=$TEST_BASE_DIR/md5sums.$$
+export MD5FILE2=$TEST_BASE_DIR/md5sums.$$.2
 
 typeset -i num=0
 while (( num < $GROUP_NUM )); do
@@ -137,3 +137,6 @@ export VDEV3=$DEVICE_DIR/${DEVICE_FILE}3
 export VDEV4=$DEVICE_DIR/${DEVICE_FILE}4
 
 export ALTER_ROOT=/alter_import-test
+
+export ZFS_SCAN_VDEV_LIMIT_SLOW=$((128*1024))
+export ZFS_SCAN_VDEV_LIMIT_DEFAULT=$((4*1024*1024))