7745 print error if lzc_* is called before libzfs_core_init

Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>

5 files changed, 26 insertions, 5 deletions

diff --git a/usr/src/lib/libzfs/Makefile.com b/usr/src/lib/libzfs/Makefile.com
index c80f481d6d..31619b01c1 100644
--- a/usr/src/lib/libzfs/Makefile.com
+++ b/usr/src/lib/libzfs/Makefile.com
@@ -72,6 +72,7 @@ C99LMODE=	-Xc99=%all
 LDLIBS +=	-lc -lm -ldevid -lgen -lnvpair -luutil -lavl -lefi \
 	-ladm -lidmap -ltsol -lmd -lumem -lzfs_core
 CPPFLAGS +=	$(INCS) -D_LARGEFILE64_SOURCE=1 -D_REENTRANT
+$(NOT_RELEASE_BUILD)CPPFLAGS += -DDEBUG
 
 # There's no lint library for zlib, so only include this when building
 $(DYNLIB) := LDLIBS +=	-lz
diff --git a/usr/src/lib/libzfs/common/libzfs_pool.c b/usr/src/lib/libzfs/common/libzfs_pool.c
index 2c20ba8ffd..f9a05aeb39 100644
--- a/usr/src/lib/libzfs/common/libzfs_pool.c
+++ b/usr/src/lib/libzfs/common/libzfs_pool.c
@@ -818,7 +818,7 @@ zpool_prop_get_feature(zpool_handle_t *zhp, const char *propname, char *buf,
 	const char *feature = strchr(propname, '@') + 1;
 
 	supported = zpool_prop_feature(propname);
-	ASSERT(supported || zfs_prop_unsupported(propname));
+	ASSERT(supported || zpool_prop_unsupported(propname));
 
 	/*
 	 * Convert from feature name to feature guid. This conversion is
diff --git a/usr/src/lib/libzfs/common/libzfs_sendrecv.c b/usr/src/lib/libzfs/common/libzfs_sendrecv.c
index b8db4c9c8e..8d4f2fccd8 100644
--- a/usr/src/lib/libzfs/common/libzfs_sendrecv.c
+++ b/usr/src/lib/libzfs/common/libzfs_sendrecv.c
@@ -266,6 +266,15 @@ cksummer(void *arg)
 	ofp = fdopen(dda->inputfd, "r");
 	while (ssread(drr, sizeof (*drr), ofp) != 0) {
 
+		/*
+		 * kernel filled in checksum, we are going to write same
+		 * record, but need to regenerate checksum.
+		 */
+		if (drr->drr_type != DRR_BEGIN) {
+			bzero(&drr->drr_u.drr_checksum.drr_checksum,
+			    sizeof (drr->drr_u.drr_checksum.drr_checksum));
+		}
+
 		switch (drr->drr_type) {
 		case DRR_BEGIN:
 		{
diff --git a/usr/src/lib/libzfs_core/Makefile.com b/usr/src/lib/libzfs_core/Makefile.com
index 1a48353cef..cd756d5be3 100644
--- a/usr/src/lib/libzfs_core/Makefile.com
+++ b/usr/src/lib/libzfs_core/Makefile.com
@@ -20,7 +20,7 @@
 #
 #
 # Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
-# Copyright (c) 2012 by Delphix. All rights reserved.
+# Copyright (c) 2012, 2016 by Delphix. All rights reserved.
 #
 
 LIBRARY= libzfs_core.a
@@ -51,6 +51,7 @@ C99MODE=	-xc99=%all
 C99LMODE=	-Xc99=%all
 LDLIBS +=	-lc -lnvpair
 CPPFLAGS +=	$(INCS) -D_LARGEFILE64_SOURCE=1 -D_REENTRANT
+$(NOT_RELEASE_BUILD)CPPFLAGS += -DDEBUG
 
 SRCS=	$(OBJS_COMMON:%.o=$(SRCDIR)/%.c)	\
 	$(OBJS_SHARED:%.o=$(SRC)/common/zfs/%.c)
diff --git a/usr/src/lib/libzfs_core/common/libzfs_core.c b/usr/src/lib/libzfs_core/common/libzfs_core.c
index 7e7891798d..9868d70ffb 100644
--- a/usr/src/lib/libzfs_core/common/libzfs_core.c
+++ b/usr/src/lib/libzfs_core/common/libzfs_core.c
@@ -85,7 +85,7 @@
 #include <sys/stat.h>
 #include <sys/zfs_ioctl.h>
 
-static int g_fd;
+static int g_fd = -1;
 static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
 static int g_refcount;
 
@@ -110,9 +110,14 @@ libzfs_core_fini(void)
 {
 	(void) pthread_mutex_lock(&g_lock);
 	ASSERT3S(g_refcount, >, 0);
-	g_refcount--;
-	if (g_refcount == 0)
+
+	if (g_refcount > 0)
+		g_refcount--;
+
+	if (g_refcount == 0 && g_fd != -1) {
 		(void) close(g_fd);
+		g_fd = -1;
+	}
 	(void) pthread_mutex_unlock(&g_lock);
 }
 
@@ -126,6 +131,7 @@ lzc_ioctl(zfs_ioc_t ioc, const char *name,
 	size_t size;
 
 	ASSERT3S(g_refcount, >, 0);
+	VERIFY3S(g_fd, !=, -1);
 
 	(void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
 
@@ -328,6 +334,9 @@ lzc_exists(const char *dataset)
 	 */
 	zfs_cmd_t zc = { 0 };
 
+	ASSERT3S(g_refcount, >, 0);
+	VERIFY3S(g_fd, !=, -1);
+
 	(void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
 	return (ioctl(g_fd, ZFS_IOC_OBJSET_STATS, &zc) == 0);
 }
@@ -573,6 +582,7 @@ recv_impl(const char *snapname, nvlist_t *props, const char *origin,
 	int error;
 
 	ASSERT3S(g_refcount, >, 0);
+	VERIFY3S(g_fd, !=, -1);
 
 	/* zc_name is name of containing filesystem */
 	(void) strlcpy(zc.zc_name, snapname, sizeof (zc.zc_name));