Mismatched nvlist names in zfs_keys_send_space

This causes "zfs send -vt ..." to fail with:

    cannot resume send: Unknown error 1030

It turns out that some of the name/value pairs in the verification
list for zfs_ioc_send_space(), zfs_keys_send_space, had the wrong
name, so the ioctl got kicked out in zfs_check_input_nvpairs().
Update the names accordingly.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: John Poduska <jpoduska@datto.com>
Closes #10978

module/zfs/zfs_ioctl.c

@@ -6431,6 +6431,8 @@ send_space_sum(objset_t *os, void *buf, int len, void *arg)
  *         presence indicates compressed DRR_WRITE records are permitted
  *     (optional) "rawok" -> (value ignored)
  *         presence indicates raw encrypted records should be used.
+ *     (optional) "resume_object" and "resume_offset" -> (uint64)
+ *         if present, resume send stream from specified object and offset.
  *     (optional) "fd" -> file descriptor to use as a cookie for progress
  *         tracking (int32)
  * }
@@ -6448,8 +6450,8 @@ static const zfs_ioc_key_t zfs_keys_send_space[] = {
 	{"rawok",		DATA_TYPE_BOOLEAN,	ZK_OPTIONAL},
 	{"fd",			DATA_TYPE_INT32,	ZK_OPTIONAL},
 	{"redactbook",		DATA_TYPE_STRING,	ZK_OPTIONAL},
-	{"resumeobj",			DATA_TYPE_UINT64,	ZK_OPTIONAL},
-	{"resumeoff",			DATA_TYPE_UINT64,	ZK_OPTIONAL},
+	{"resume_object",	DATA_TYPE_UINT64,	ZK_OPTIONAL},
+	{"resume_offset",	DATA_TYPE_UINT64,	ZK_OPTIONAL},
 	{"bytes",		DATA_TYPE_UINT64,	ZK_OPTIONAL},
 };
 

tests/zfs-tests/tests/functional/rsend/rsend.kshlib

@@ -635,12 +635,14 @@ function file_check
 # $1 The ZFS send command
 # $2 The filesystem where the streams are sent
 # $3 The receive filesystem
+# $4 Test dry-run (optional)
 #
 function resume_test
 {
-	sendcmd=$1
-	streamfs=$2
-	recvfs=$3
+	typeset sendcmd=$1
+	typeset streamfs=$2
+	typeset recvfs=$3
+	typeset dryrun=${4:-1}
 
 	stream_num=1
 	log_must eval "$sendcmd >/$streamfs/$stream_num"
@@ -651,6 +653,11 @@ function resume_test
 		stream_num=$((stream_num+1))
 
 		token=$(zfs get -Hp -o value receive_resume_token $recvfs)
+
+		# Do a dry-run
+		[ $dryrun -ne 0 ] && \
+			log_must eval "zfs send -nvt $token > /dev/null"
+
 		log_must eval "zfs send -t $token  >/$streamfs/$stream_num"
 		[[ -f /$streamfs/$stream_num ]] || \
 		    log_fail "NO FILE /$streamfs/$stream_num"

tests/zfs-tests/tests/functional/rsend/rsend_024_pos.ksh

@@ -46,7 +46,7 @@ log_onexit resume_cleanup $sendfs $streamfs
 
 test_fs_setup $sendfs $recvfs $streamfs
 log_must zfs unmount -f $sendfs
-resume_test "zfs send $sendfs" $streamfs $recvfs
+resume_test "zfs send $sendfs" $streamfs $recvfs 0
 file_check $sendfs $recvfs
 
 log_pass "Verify resumability of a full ZFS send/receive with the source " \