Move common zfs ioctl compatibility functions (userland) into libzfs_compat.c

Introduce additional constants for zfs ioctl versions

4 files changed, 116 insertions, 75 deletions

diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.c
new file mode 100644
index 0000000..2a2ae76
--- /dev/null
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.c
@@ -0,0 +1,103 @@
+/*
+ * CDDL HEADER SART
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
+ */
+
+#include "libzfs_compat.h"
+
+int zfs_ioctl_version = ZFS_IOCVER_UNDEF;
+static int zfs_spa_version = -1;
+
+/*
+ * Get zfs_ioctl_version
+ */
+int
+get_zfs_ioctl_version(void)
+{
+	size_t ver_size;
+	int ver = ZFS_IOCVER_NONE;
+
+	ver_size = sizeof(ver);
+	sysctlbyname("vfs.zfs.version.ioctl", &ver, &ver_size, NULL, 0);
+
+	return (ver);
+}
+
+/*
+ * Get the SPA version
+ */
+static int
+get_zfs_spa_version(void)
+{
+	size_t ver_size;
+	int ver = 0;
+
+	ver_size = sizeof(ver);
+	sysctlbyname("vfs.zfs.version.spa", &ver, &ver_size, NULL, 0);
+
+	return (ver);
+}
+
+/*
+ * This is FreeBSD version of ioctl, because Solaris' ioctl() updates
+ * zc_nvlist_dst_size even if an error is returned, on FreeBSD if an
+ * error is returned zc_nvlist_dst_size won't be updated.
+ */
+int
+zcmd_ioctl(int fd, int request, zfs_cmd_t *zc)
+{
+	size_t oldsize;
+	int ret, cflag = ZFS_CMD_COMPAT_NONE;
+
+	if (zfs_ioctl_version == ZFS_IOCVER_UNDEF)
+		zfs_ioctl_version = get_zfs_ioctl_version();
+
+	if (zfs_ioctl_version == ZFS_IOCVER_DEADMAN)
+		cflag = ZFS_CMD_COMPAT_DEADMAN;
+
+	/*
+	 * If vfs.zfs.version.ioctl is not defined, assume we have v28
+	 * compatible binaries and use vfs.zfs.version.spa to test for v15
+	 */
+	if (zfs_ioctl_version < ZFS_IOCVER_DEADMAN) {
+		cflag = ZFS_CMD_COMPAT_V28;
+
+		if (zfs_spa_version < 0)
+			zfs_spa_version = get_zfs_spa_version();
+
+		if (zfs_spa_version == SPA_VERSION_15 ||
+		    zfs_spa_version == SPA_VERSION_14 ||
+		    zfs_spa_version == SPA_VERSION_13)
+			cflag = ZFS_CMD_COMPAT_V15;
+	}
+
+	oldsize = zc->zc_nvlist_dst_size;
+	ret = zcmd_ioctl_compat(fd, request, zc, cflag);
+
+	if (ret == 0 && oldsize < zc->zc_nvlist_dst_size) {
+		ret = -1;
+		errno = ENOMEM;
+	}
+
+	return (ret);
+}
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.h b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.h
index 400c814..3761668 100644
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.h
+++ b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_compat.h
@@ -32,71 +32,9 @@
 extern "C" {
 #endif
 
-static int zfs_ioctl_version = -1;
-static int zfs_kernel_version = 0;
+int get_zfs_ioctl_version(void);
+int zcmd_ioctl(int fd, int request, zfs_cmd_t *zc);
 
-/*
- * Get zfs_ioctl_version
- */
-static __inline int
-get_zfs_ioctl_version(void)
-{
-	size_t ver_size;
-	int ver = 0;
-
-	ver_size = sizeof(ver);
-	sysctlbyname("vfs.zfs.version.ioctl", &ver, &ver_size, NULL, 0);
-
-	return (ver);
-}
-
-/*
- * This is FreeBSD version of ioctl, because Solaris' ioctl() updates
- * zc_nvlist_dst_size even if an error is returned, on FreeBSD if an
- * error is returned zc_nvlist_dst_size won't be updated.
- */
-static __inline int
-zcmd_ioctl(int fd, int request, zfs_cmd_t *zc)
-{
-	size_t oldsize, zfs_kernel_version_size;
-	int version, ret, cflag = ZFS_CMD_COMPAT_NONE;
-
-	if (zfs_ioctl_version == -1)
-		zfs_ioctl_version = get_zfs_ioctl_version();
-
-	if (zfs_ioctl_version == ZFS_IOCVER_DEADMAN)
-		cflag = ZFS_CMD_COMPAT_DEADMAN;
-
-	/*
-	 * If vfs.zfs.version.ioctl is not defined, assume we have v28
-	 * compatible binaries and use vfs.zfs.version.spa to test for v15
-	 */
-	if (zfs_ioctl_version < ZFS_IOCVER_DEADMAN) {
-		cflag = ZFS_CMD_COMPAT_V28;
-		zfs_kernel_version_size = sizeof(zfs_kernel_version);
-
-		if (zfs_kernel_version == 0) {
-			sysctlbyname("vfs.zfs.version.spa",
-			    &zfs_kernel_version,
-			    &zfs_kernel_version_size, NULL, 0);
-		}
-
-		if (zfs_kernel_version == SPA_VERSION_15 ||
-		    zfs_kernel_version == SPA_VERSION_14 ||
-		    zfs_kernel_version == SPA_VERSION_13)
-			cflag = ZFS_CMD_COMPAT_V15;
-	}
-
-	oldsize = zc->zc_nvlist_dst_size;
-	ret = zcmd_ioctl_compat(fd, request, zc, cflag);
-
-	if (ret == 0 && oldsize < zc->zc_nvlist_dst_size) {
-		ret = -1;
-		errno = ENOMEM;
-	}
-
-	return (ret);
-}
 #define	ioctl(fd, ioc, zc)	zcmd_ioctl((fd), (ioc), (zc))
 
 #ifdef	__cplusplus
diff --git a/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c b/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c
index 3319d20..83d0296 100644
--- a/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c
+++ b/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core.c
@@ -88,7 +88,7 @@
 #include "libzfs_compat.h"
 
 #ifdef __FreeBSD__
-int lzc_ioctl_version = -1;
+extern int zfs_ioctl_version;
 #endif
 
 static int g_fd;
@@ -140,10 +140,10 @@ lzc_ioctl(zfs_ioc_t ioc, const char *name,
 	(void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
 
 #ifdef __FreeBSD__
-	if (lzc_ioctl_version == -1)
-		lzc_ioctl_version = get_zfs_ioctl_version();
+	if (zfs_ioctl_version == ZFS_IOCVER_UNDEF)
+		zfs_ioctl_version = get_zfs_ioctl_version();
 
-	if (lzc_ioctl_version < ZFS_IOCVER_LZC) {
+	if (zfs_ioctl_version < ZFS_IOCVER_LZC) {
 		oldsource = source;
 		error = lzc_compat_pre(&zc, &ioc, &source);
 		if (error)
@@ -190,7 +190,7 @@ lzc_ioctl(zfs_ioc_t ioc, const char *name,
 	}
 
 #ifdef __FreeBSD__
-	if (lzc_ioctl_version < ZFS_IOCVER_LZC)
+	if (zfs_ioctl_version < ZFS_IOCVER_LZC)
 		lzc_compat_post(&zc, ioc);
 #endif
 	if (zc.zc_nvlist_dst_filled) {
@@ -200,12 +200,12 @@ lzc_ioctl(zfs_ioc_t ioc, const char *name,
 		*resultp = NULL;
 	}
 #ifdef __FreeBSD__
-	if (lzc_ioctl_version < ZFS_IOCVER_LZC)
+	if (zfs_ioctl_version < ZFS_IOCVER_LZC)
 		lzc_compat_outnvl(&zc, ioc, resultp);
 #endif
 out:
 #ifdef __FreeBSD__
-	if (lzc_ioctl_version < ZFS_IOCVER_LZC) {
+	if (zfs_ioctl_version < ZFS_IOCVER_LZC) {
 		if (source != oldsource)
 			nvlist_free(source);
 		source = oldsource;
diff --git a/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core_compat.c b/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core_compat.c
index 0ab12b6..c19be1f 100644
--- a/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core_compat.c
+++ b/cddl/contrib/opensolaris/lib/libzfs_core/common/libzfs_core_compat.c
@@ -27,7 +27,7 @@
 #include <zfs_ioctl_compat.h>
 #include "libzfs_core_compat.h"
 
-extern int lzc_ioctl_version;
+extern int zfs_ioctl_version;
 
 int
 lzc_compat_pre(zfs_cmd_t *zc, zfs_ioc_t *ioc, nvlist_t **source)
@@ -40,7 +40,7 @@ lzc_compat_pre(zfs_cmd_t *zc, zfs_ioc_t *ioc, nvlist_t **source)
 	int error = 0;
 	int pos;
 
-	if (lzc_ioctl_version >= ZFS_IOCVER_LZC)
+	if (zfs_ioctl_version >= ZFS_IOCVER_LZC)
 		return (0);
 
 	vecnum = *ioc;
@@ -99,7 +99,7 @@ lzc_compat_pre(zfs_cmd_t *zc, zfs_ioc_t *ioc, nvlist_t **source)
 void
 lzc_compat_post(zfs_cmd_t *zc, const zfs_ioc_t ioc)
 {
-	if (lzc_ioctl_version >= ZFS_IOCVER_LZC)
+	if (zfs_ioctl_version >= ZFS_IOCVER_LZC)
 		return;
 
 	switch (ioc) {
@@ -118,7 +118,7 @@ lzc_compat_outnvl(zfs_cmd_t *zc, const zfs_ioc_t ioc, nvlist_t **outnvl)
 {
 	nvlist_t *nvl;
 
-	if (lzc_ioctl_version >= ZFS_IOCVER_LZC)
+	if (zfs_ioctl_version >= ZFS_IOCVER_LZC)
 		return (0);
 
 	switch (ioc) {