Fix issues with raw sends of spill blocks

This patch fixes 2 issues in how spill blocks are processed during
raw sends. The first problem is that compressed spill blocks were
using the logical length rather than the physical length to
determine how much data to dump into the send stream. The second
issue is a typo that caused the spill record's object number to be
used where the objset's ID number was required. Both issues have
been corrected, and the payload_size is now printed in zstreamdump
for future debugging.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Tom Caputi <[email protected]>
Closes #7378 
Closes #7432

cmd/zstreamdump/zstreamdump.c

@@ -614,6 +614,9 @@ main(int argc, char *argv[])
 				    BSWAP_64(drrs->drr_compressed_size);
 				drrs->drr_type = BSWAP_32(drrs->drr_type);
 			}
+
+			payload_size = DRR_SPILL_PAYLOAD_SIZE(drrs);
+
 			if (verbose) {
 				sprintf_bytes(salt, drrs->drr_salt,
 				    ZIO_DATA_SALT_LEN);
@@ -626,19 +629,21 @@ main(int argc, char *argv[])
 				    "length = %llu flags = %u "
 				    "compression type = %u "
 				    "compressed_size = %llu "
+				    "payload_size = %llu "
 				    "salt = %s iv = %s mac = %s\n",
 				    (u_longlong_t)drrs->drr_object,
 				    (u_longlong_t)drrs->drr_length,
 				    drrs->drr_flags,
 				    drrs->drr_compressiontype,
 				    (u_longlong_t)drrs->drr_compressed_size,
+				    (u_longlong_t)payload_size,
 				    salt,
 				    iv,
 				    mac);
 			}
-			(void) ssread(buf, drrs->drr_length, &zc);
+			(void) ssread(buf, payload_size, &zc);
 			if (dump) {
-				print_block(buf, drrs->drr_length);
+				print_block(buf, payload_size);
 			}
 			break;
 		case DRR_WRITE_EMBEDDED:

module/zfs/dmu_send.c

@@ -422,6 +422,7 @@ dump_spill(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t object, void *data)
 {
 	struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
 	uint64_t blksz = BP_GET_LSIZE(bp);
+	uint64_t payload_size = blksz;
 
 	if (dsp->dsa_pending_op != PENDING_NONE) {
 		if (dump_record(dsp, NULL, 0) != 0)
@@ -446,9 +447,10 @@ dump_spill(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t object, void *data)
 		drrs->drr_compressed_size = BP_GET_PSIZE(bp);
 		zio_crypt_decode_params_bp(bp, drrs->drr_salt, drrs->drr_iv);
 		zio_crypt_decode_mac_bp(bp, drrs->drr_mac);
+		payload_size = drrs->drr_compressed_size;
 	}
 
-	if (dump_record(dsp, data, blksz) != 0)
+	if (dump_record(dsp, data, payload_size) != 0)
 		return (SET_ERROR(EINTR));
 	return (0);
 }
@@ -3395,7 +3397,7 @@ receive_read_record(struct receive_arg *ra)
 			    ra->byteswap;
 
 			abuf = arc_loan_raw_buf(dmu_objset_spa(ra->os),
-			    drrs->drr_object, byteorder, drrs->drr_salt,
+			    dmu_objset_id(ra->os), byteorder, drrs->drr_salt,
 			    drrs->drr_iv, drrs->drr_mac, drrs->drr_type,
 			    drrs->drr_compressed_size, drrs->drr_length,
 			    drrs->drr_compressiontype);

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

@@ -15,7 +15,7 @@
 #
 
 #
-# Copyright (c) 2017 by Datto Inc. All rights reserved.
+# Copyright (c) 2018 by Datto Inc. All rights reserved.
 #
 
 . $STF_SUITE/tests/functional/rsend/rsend.kshlib
@@ -33,8 +33,9 @@
 # 6. Add a file truncated to 4M to the filesystem
 # 7. Add a sparse file with metadata compression disabled to the filesystem
 # 8. Add and remove 1000 empty files to the filesystem
-# 9. Snapshot the filesystem
-# 10. Send and receive the filesystem, ensuring that it can be mounted
+# 9. Add a file with a large xattr value
+# 10. Snapshot the filesystem
+# 11. Send and receive the filesystem, ensuring that it can be mounted
 #
 
 verify_runnable "both"
@@ -79,6 +80,11 @@ for i in {1..1000}; do
 done
 sync
 
+# ZoL issue #7432
+log_must zfs set compression=on xattr=sa $TESTPOOL/$TESTFS2
+log_must touch /$TESTPOOL/$TESTFS2/attrs
+log_must eval "python -c 'print \"a\" * 4096' | attr -s bigval /$TESTPOOL/$TESTFS2/attrs"
+
 log_must zfs snapshot $TESTPOOL/$TESTFS2@now
 log_must eval "zfs send -wR $TESTPOOL/$TESTFS2@now > $sendfile"