- API to get modified data from metadata

- Handling of rebuild IO from other replica according to metadata
- Removing code based on txg number

Signed-off-by: mayank <mayank.patel@cloudbyte.com>

.travis.yml

@@ -14,8 +14,6 @@ env:
       ZFS_BUILD_TAGS=0
     - ZFS_TEST_TAGS=rebuild_test
       ZFS_BUILD_TAGS=0
-    - ZFS_TEST_TAGS=txg_diff_test
-      ZFS_BUILD_TAGS=0
     - ZFS_TEST_TAGS=fio_test
       ZFS_BUILD_TAGS=0
     - ZFS_TEST_TAGS=zrepl_test

cmd/uzfs_test/Makefile.am

@@ -15,10 +15,8 @@ uzfs_test_SOURCES = \
 	uzfs_test.c	\
 	uzfs_test_sync.c \
 	uzfs_zvol_zap.c \
-	uzfs_txg_diff.c \
 	zrepl_utest.c \
-	uzfs_rebuilding.c
-
+	uzfs_test_rebuilding.c
 
 uzfs_test_LDADD = \
 	$(top_builddir)/lib/libnvpair/libnvpair.la \

cmd/uzfs_test/uzfs_test.c

@@ -50,9 +50,6 @@ uzfs_test_info_t uzfs_tests[] = {
 	{ uzfs_zvol_zap_operation, "uzfs zap operation test" },
 	{ replay_fn, "zvol replay test" },
 	{ unit_test_fn, "zvol read/write verification test"},
-	{ uzfs_txg_diff_verifcation_test,
-	    "test to verify modified blocks between two txg for zvol" },
-	{ uzfs_txg_diff_tree_test, "txg_diff_tree functionality test" },
 	{ uzfs_rebuild_test, "uzfs rebuild pool test"},
 	{ zrepl_utest, "ZFS replication test" },
 	{ uzfs_test_get_metablk_details, "Tests offset,len calculations of"\