[CCS 59] provide APIs for pool/ds creation and reads/writes over DMU (o…

…penzfs#11)

* [CCS 59] uZFS API to call dmu from istgt

* [CCS-59] fix in travis and header for pkg-utils

* Adding other header files for make pkg build

* [CCS 59] added few header files to build pkg mod

* [CCS 59]cstyle fixes, adding cstyle check to travis

* Remove unnecessary header files,added TOTAL_TIME env

* Incorporating review comments [CCS 59]

* cstyle fix, removed getenv in uzfs_test

* Merged libuzfs_ioctl into zfs_ioctl

* cstyle fix, removed cstyle from travis

* compilation issue with non-uzfs and userspace build

Once zvol is created using 'zfs create -V' command, it can be opened by doing 'uzfs_open_dataset()', and use uzfs_write_data() and uzfs_read_data() APIs for doing IOs.

.travis.yml

@@ -48,8 +48,11 @@ install:
       fi
 script:
     - if [ $ZFS_BUILD_TAGS = 0 ]; then
-        cd cmd/ztest;
-        travis_wait 60 ./ztest -V;
+        cd cmd/uzfs_test;
+        truncate -s 2G /tmp/ztest.1a;
+        truncate -s 2G /tmp/ztest.2a;
+        truncate -s 256M /tmp/ztest.log;
+        travis_wait 5 ./uzfs_test;
       else
         travis_wait 100 /usr/share/zfs/zfs-tests.sh -v;
       fi

cmd/Makefile.am

@@ -1,3 +1,3 @@
-SUBDIRS  = zfs zpool zdb zhack zinject zstreamdump ztest zpios
+SUBDIRS  = zfs zpool zdb zhack zinject zstreamdump ztest uzfs_test zpios
 SUBDIRS += mount_zfs fsck_zfs zvol_id vdev_id arcstat dbufstat zed
 SUBDIRS += arc_summary raidz_test zgenhostid tgt

cmd/uzfs_test/Makefile.am

@@ -0,0 +1,24 @@
+include $(top_srcdir)/config/Rules.am
+
+# -Wnoformat-truncation to get rid of compiler warning for unchecked
+#  truncating snprintfs on gcc 7.1.1.
+AM_CFLAGS += $(DEBUG_STACKFLAGS) $(FRAME_LARGER_THAN) $(NO_FORMAT_TRUNCATION)
+AM_CPPFLAGS += -DDEBUG
+
+DEFAULT_INCLUDES += \
+	-I$(top_srcdir)/include \
+	-I$(top_srcdir)/lib/libspl/include
+
+sbin_PROGRAMS = uzfs_test
+
+uzfs_test_SOURCES = \
+	uzfs_test.c
+
+uzfs_test_LDADD = \
+	$(top_builddir)/lib/libnvpair/libnvpair.la \
+	$(top_builddir)/lib/libuutil/libuutil.la \
+	$(top_builddir)/lib/libzpool/libzpool.la \
+	$(top_builddir)/lib/libzfs/libzfs.la \
+	$(top_builddir)/lib/libzfs_core/libzfs_core.la
+
+uzfs_test_LDADD += -lm