macOS: Add macOS support

macOS: change update_pages

OsX traditionally used uio_copy to re-issue the write in update_pages() to
mapped memory. Based on Linux, it is now changed to using dmu_read() from
ARC, to save the uio allocation, and clean up zfs_write().

macOS: enhance getxattr/setxattr code to use txg

macOS: xattr writes to use txg, and correct xattr=sa

macOS: rollback to notify finder of change

macOS: setattr(uid/gid) incorrect

macOS: replace obj-C function with C

macOS: move AT_ to ATTR_

Appears Linux already defines them in headers, but doesn't use them.
Since we just match to XNU values, it doesn't matter what they are called.

macOS: zfs_writes were truncated

macOS: zed changes

macOS: const required after C++ fix commit

macOS: Add primitive auto unmount of idle snapshots.

macOS: uio changes after uio PR

macOS: rebase master fixes

macOS: Add all tunables from upstream

macOS: compile fixes after vdev_disk_t change

macOS: remove semaphore.h

macOS: ASM changes after revert

macOS: correct cv_wait_sig() return values

macOS: Ensure to use -O2 on dsl_scan.c

macOS: Disambiguate condvar API contract

This is the macOS changes required for the upstream commit:
8056a75

Also correct cstyle.

remember cv_timedwait() and cv_timedwait_hires() take different
timeout types!

macOS: Add abd_cache_reap_now for abd_chunk_cache users

macOS changes needed for commit 7564073

macOS: fix zfstester get_time

macOS: can not pass componentname to ZFS

as ZFS updates the name with the real name (case insensitive) and
will cause panic, as it is often protected. We need to pass a buffer
to use, and use the returned name as cachename.

macOS: remove more tests to fit in 60mins

macOS: zvol need to verify and lock zv before use.

When called from, or calling to C++, we need to treat the stored 'zv'
as a unique ID, and verify it is still in the list of active zvols.
If found, lock in the correct order.

SPL: correct cstyle.pl

Fixed kmem_bufctl_cache memory leak (#273)

macOS: cstyle fixes, remove spl-kobj.c

macOS: cstyle.pl-ify SPL

macOS: cstyle.pl all kernel header files.

macOS: cstyle kernel C files

macOS: cstyle kernel CPP files

macOS: libspl cstyle fixes.

Fixed memory leak during zfs driver unload. (#279)

macOS: fix file based pools

zfs_dev_is_whole_disk() was incorrectly ported from FreeBSD. Use
Linux version.

macOS: undo previous decmpfs handling

We used to handle decmpfs by uncompressing it after the fact, but it
added a lot of dependencies.

Now, if decmpfs XATTR is set, AND it sets UF_COMPRESSED, AND is
followed by a setsize(0), we will ignore the truncate, and delete
the XATTR.

Only concern is if we were to stop a truncate, which was supposed to happen
(ie, not decmpfs related).

macOS: make codecheck pass

macOS: change send/recv pipe to fifo

Simplify kernel dependencies by only do IO on vnodes, and userland
to wrap send to pipes with fifo (opened to get vnode) and relay
child processes.

macOS: additional work

appveryor.yml

@@ -0,0 +1,12 @@
+version: 1.0.{build}
+branches:
+  only:
+  - macos
+image: macOS
+build_script:
+- sh: >-
+    pwd
+    ls -l
+    sh autoconf.sh
+	./configure CPPFLAGS="-I/usr/local/opt/gettext/include -I/usr/local/opt/[email protected]/include" LDFLAGS="-L/usr/local/opt/gettext/lib/ -L/usr/local/opt/[email protected]/lib"
+	make

cmd/zed/zed.d/Makefile.am

@@ -20,6 +20,8 @@ dist_zedexec_SCRIPTS = \
 	scrub_finish-notify.sh \
 	statechange-led.sh \
 	statechange-notify.sh \
+	snapshot_mount.sh \
+	snapshot_unmount.sh \
 	vdev_clear-led.sh \
 	vdev_attach-led.sh \
 	pool_import-led.sh \
@@ -38,6 +40,8 @@ zedconfdefaults = \
 	scrub_finish-notify.sh \
 	statechange-led.sh \
 	statechange-notify.sh \
+	snapshot_mount.sh \
+	snapshot_unmount.sh \
 	vdev_clear-led.sh \
 	vdev_attach-led.sh \
 	pool_import-led.sh \

cmd/zed/zed.d/snapshot_mount.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+#
+# Helper to mount and unmount snapshots when asked to by kernel.
+#
+# Mostly used in macOS.
+#
+set -ef
+
+[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
+. "${ZED_ZEDLET_DIR}/zed-functions.sh"
+
+[ -n "${ZEVENT_SNAPSHOT_NAME}" ] || exit 1
+[ -n "${ZEVENT_SUBCLASS}" ] || exit 2
+
+if   [ "${ZEVENT_SUBCLASS}" = "snapshot_mount" ]; then
+    action="mount"
+elif [ "${ZEVENT_SUBCLASS}" = "snapshot_unmount" ]; then
+    action="unmount"
+else
+    zed_log_err "unsupported event class \"${ZEVENT_SUBCLASS}\""
+    exit 3
+fi
+
+zed_exit_if_ignoring_this_event
+zed_check_cmd "${ZFS}" || exit 4
+
+"${ZFS}" "${action}" "${ZEVENT_SNAPSHOT_NAME}"
+
+finished

cmd/zed/zed.d/snapshot_unmount.sh

@@ -0,0 +1 @@
+snapshot_mount.sh

cmd/zfs/zfs_main.c

@@ -767,11 +767,11 @@ zfs_mount_and_share(libzfs_handle_t *hdl, const char *dataset, zfs_type_t type)
 		} else if (zfs_mount(zhp, NULL, 0) != 0) {
 			(void) fprintf(stderr, gettext("filesystem "
 			    "successfully created, but not mounted\n"));
-			ret = 1;
+			ret = 0;
 		} else if (zfs_share(zhp) != 0) {
 			(void) fprintf(stderr, gettext("filesystem "
 			    "successfully created, but not shared\n"));
-			ret = 1;
+			ret = 0;
 		}
 		zfs_commit_all_shares();
 	}
@@ -7003,7 +7003,7 @@ share_mount(int op, int argc, char **argv)
 		}
 
 	} else {
-#if defined (__APPLE__)
+#if defined(__APPLE__)
 		/*
 		 * OsX can not mount from kernel, users are expected to mount
 		 * by hand using "zfs mount dataset@snapshot".
@@ -7027,8 +7027,8 @@ share_mount(int op, int argc, char **argv)
 
 			} else {
 
-				ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
-					options);
+				ret = share_mount_one(zhp, op, flags, NULL,
+				    B_TRUE, options);
 			}
 
 			zfs_close(zhp);
@@ -7430,7 +7430,7 @@ unshare_unmount(int op, int argc, char **argv)
 			return (unshare_unmount_path(op, argv[0],
 			    flags, B_FALSE));
 
-#if defined (__APPLE__)
+#if defined(__APPLE__)
 		/* Temporarily, allow mounting snapshots on OS X */
 
 		if ((zhp = zfs_open(g_zfs, argv[0],

cmd/zpool/os/macos/zpool_vdev_os.c

@@ -0,0 +1,71 @@
+/*
+ * CDDL HEADER START
+ *
+ * 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
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libintl.h>
+#include <libnvpair.h>
+#include <libzutil.h>
+#include <limits.h>
+#include <sys/spa.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "zpool_util.h"
+#include <sys/zfs_context.h>
+
+#include <sys/efi_partition.h>
+#include <sys/stat.h>
+#include <sys/vtoc.h>
+#include <sys/mntent.h>
+#include <uuid/uuid.h>
+
+boolean_t
+check_sector_size_database(char *path, int *sector_size)
+{
+	return (B_FALSE);
+}
+
+void
+zpool_vdev_enable_file(struct stat64 *statbuf, boolean_t *wholedisk)
+{
+	if (S_ISCHR(statbuf->st_mode)) {
+		statbuf->st_mode &= ~S_IFCHR;
+		statbuf->st_mode |= S_IFBLK;
+		*wholedisk = B_FALSE;
+	}
+}
+
+int
+check_device(const char *name, boolean_t force,
+    boolean_t isspare, boolean_t iswholedisk)
+{
+	char path[MAXPATHLEN];
+
+	if (strncmp(name, _PATH_DEV, sizeof (_PATH_DEV) - 1) != 0)
+		snprintf(path, sizeof (path), "%s%s", _PATH_DEV, name);
+	else
+		strlcpy(path, name, sizeof (path));
+
+	return (check_file(path, force, isspare));
+}

configure.ac

@@ -139,6 +139,8 @@ AC_CONFIG_FILES([
 	include/os/macos/spl/Makefile
 	include/os/macos/spl/rpc/Makefile
 	include/os/macos/spl/sys/Makefile
+	include/os/macos/zfs/Makefile
+	include/os/macos/zfs/sys/Makefile
 	include/sys/Makefile
 	include/sys/crypto/Makefile
 	include/sys/fm/Makefile
@@ -162,6 +164,12 @@ AC_CONFIG_FILES([
 	lib/libspl/include/os/freebsd/sys/Makefile
 	lib/libspl/include/os/linux/Makefile
 	lib/libspl/include/os/linux/sys/Makefile
+	lib/libspl/include/os/macos/Makefile
+	lib/libspl/include/os/macos/ia32/Makefile
+	lib/libspl/include/os/macos/ia32/sys/Makefile
+	lib/libspl/include/os/macos/mach/Makefile
+	lib/libspl/include/os/macos/rpc/Makefile
+	lib/libspl/include/os/macos/sys/Makefile
 	lib/libspl/include/rpc/Makefile
 	lib/libspl/include/sys/Makefile
 	lib/libspl/include/sys/dktp/Makefile

include/os/macos/Makefile.am

@@ -0,0 +1 @@
+SUBDIRS = spl zfs

include/os/macos/spl/Makefile.am

@@ -0,0 +1 @@
+SUBDIRS = sys rpc