Merge OpenZFS support in to HEAD.

The primary benefit is maintaining a completely shared
code base with the community allowing FreeBSD to receive
new features sooner and with less effort.

I would advise against doing 'zpool upgrade'
or creating indispensable pools using new
features until this change has had a month+
to soak.

Work on merging FreeBSD support in to what was
at the time "ZFS on Linux" began in August 2018.
I first publicly proposed transitioning FreeBSD
to (new) OpenZFS on December 18th, 2018. FreeBSD
support in OpenZFS was finally completed in December
2019. A CFT for downstreaming OpenZFS support in
to FreeBSD was first issued on July 8th. All issues
that were reported have been addressed or, for
a couple of less critical matters there are
pull requests in progress with OpenZFS. iXsystems
has tested and dogfooded extensively internally.
The TrueNAS 12 release is based on OpenZFS with
some additional features that have not yet made
it upstream.

Improvements include:
  project quotas, encrypted datasets,
  allocation classes, vectorized raidz,
  vectorized checksums, various command line
  improvements, zstd compression.

Thanks to those who have helped along the way:
Ryan Moeller, Allan Jude, Zack Welch, and many
others.

Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D25872

1 files changed, 0 insertions, 399 deletions

diff --git a/sys/cddl/contrib/opensolaris/common/zfs/zfs_namecheck.c b/sys/cddl/contrib/opensolaris/common/zfs/zfs_namecheck.c
deleted file mode 100644
index bad8f20e6917..000000000000
--- a/sys/cddl/contrib/opensolaris/common/zfs/zfs_namecheck.c
+++ /dev/null
@@ -1,399 +0,0 @@
-/*
- * 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
- */
-/*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * Copyright (c) 2013, 2016 by Delphix. All rights reserved.
- */
-
-/*
- * Common name validation routines for ZFS.  These routines are shared by the
- * userland code as well as the ioctl() layer to ensure that we don't
- * inadvertently expose a hole through direct ioctl()s that never gets tested.
- * In userland, however, we want significantly more information about _why_ the
- * name is invalid.  In the kernel, we only care whether it's valid or not.
- * Each routine therefore takes a 'namecheck_err_t' which describes exactly why
- * the name failed to validate.
- */
-
-#if defined(_KERNEL)
-#include <sys/systm.h>
-#else
-#include <string.h>
-#endif
-
-#include <sys/dsl_dir.h>
-#include <sys/param.h>
-#include <sys/nvpair.h>
-#include "zfs_namecheck.h"
-#include "zfs_deleg.h"
-
-/*
- * Deeply nested datasets can overflow the stack, so we put a limit
- * in the amount of nesting a path can have. zfs_max_dataset_nesting
- * can be tuned temporarily to fix existing datasets that exceed our
- * predefined limit.
- */
-int zfs_max_dataset_nesting = 50;
-
-static int
-valid_char(char c)
-{
-	return ((c >= 'a' && c <= 'z') ||
-	    (c >= 'A' && c <= 'Z') ||
-	    (c >= '0' && c <= '9') ||
-	    c == '-' || c == '_' || c == '.' || c == ':' || c == ' ');
-}
-
-/*
- * Looks at a path and returns its level of nesting (depth).
- */
-int
-get_dataset_depth(const char *path)
-{
-	const char *loc = path;
-	int nesting = 0;
-
-	/*
-	 * Keep track of nesting until you hit the end of the
-	 * path or found the snapshot/bookmark seperator.
-	 */
-	for (int i = 0; loc[i] != '\0' &&
-	    loc[i] != '@' &&
-	    loc[i] != '#'; i++) {
-		if (loc[i] == '/')
-			nesting++;
-	}
-
-	return (nesting);
-}
-
-/*
- * Snapshot names must be made up of alphanumeric characters plus the following
- * characters:
- *
- *	[-_.: ]
- *
- * Returns 0 on success, -1 on error.
- */
-int
-zfs_component_namecheck(const char *path, namecheck_err_t *why, char *what)
-{
-	const char *loc;
-
-	if (strlen(path) >= ZFS_MAX_DATASET_NAME_LEN) {
-		if (why)
-			*why = NAME_ERR_TOOLONG;
-		return (-1);
-	}
-
-	if (path[0] == '\0') {
-		if (why)
-			*why = NAME_ERR_EMPTY_COMPONENT;
-		return (-1);
-	}
-
-	for (loc = path; *loc; loc++) {
-		if (!valid_char(*loc)) {
-			if (why) {
-				*why = NAME_ERR_INVALCHAR;
-				*what = *loc;
-			}
-			return (-1);
-		}
-	}
-	return (0);
-}
-
-
-/*
- * Permissions set name must start with the letter '@' followed by the
- * same character restrictions as snapshot names, except that the name
- * cannot exceed 64 characters.
- *
- * Returns 0 on success, -1 on error.
- */
-int
-permset_namecheck(const char *path, namecheck_err_t *why, char *what)
-{
-	if (strlen(path) >= ZFS_PERMSET_MAXLEN) {
-		if (why)
-			*why = NAME_ERR_TOOLONG;
-		return (-1);
-	}
-
-	if (path[0] != '@') {
-		if (why) {
-			*why = NAME_ERR_NO_AT;
-			*what = path[0];
-		}
-		return (-1);
-	}
-
-	return (zfs_component_namecheck(&path[1], why, what));
-}
-
-/*
- * Dataset paths should not be deeper than zfs_max_dataset_nesting
- * in terms of nesting.
- *
- * Returns 0 on success, -1 on error.
- */
-int
-dataset_nestcheck(const char *path)
-{
-	return ((get_dataset_depth(path) < zfs_max_dataset_nesting) ? 0 : -1);
-}
-
-/*
- * Entity names must be of the following form:
- *
- *	[component/]*[component][(@|#)component]?
- *
- * Where each component is made up of alphanumeric characters plus the following
- * characters:
- *
- *	[-_.:%]
- *
- * We allow '%' here as we use that character internally to create unique
- * names for temporary clones (for online recv).
- *
- * Returns 0 on success, -1 on error.
- */
-int
-entity_namecheck(const char *path, namecheck_err_t *why, char *what)
-{
-	const char *end;
-
-	/*
-	 * Make sure the name is not too long.
-	 */
-	if (strlen(path) >= ZFS_MAX_DATASET_NAME_LEN) {
-		if (why)
-			*why = NAME_ERR_TOOLONG;
-		return (-1);
-	}
-
-	/* Explicitly check for a leading slash.  */
-	if (path[0] == '/') {
-		if (why)
-			*why = NAME_ERR_LEADING_SLASH;
-		return (-1);
-	}
-
-	if (path[0] == '\0') {
-		if (why)
-			*why = NAME_ERR_EMPTY_COMPONENT;
-		return (-1);
-	}
-
-	const char *start = path;
-	boolean_t found_delim = B_FALSE;
-	for (;;) {
-		/* Find the end of this component */
-		end = start;
-		while (*end != '/' && *end != '@' && *end != '#' &&
-		    *end != '\0')
-			end++;
-
-		if (*end == '\0' && end[-1] == '/') {
-			/* trailing slashes are not allowed */
-			if (why)
-				*why = NAME_ERR_TRAILING_SLASH;
-			return (-1);
-		}
-
-		/* Validate the contents of this component */
-		for (const char *loc = start; loc != end; loc++) {
-			if (!valid_char(*loc) && *loc != '%') {
-				if (why) {
-					*why = NAME_ERR_INVALCHAR;
-					*what = *loc;
-				}
-				return (-1);
-			}
-		}
-
-		/* Snapshot or bookmark delimiter found */
-		if (*end == '@' || *end == '#') {
-			/* Multiple delimiters are not allowed */
-			if (found_delim != 0) {
-				if (why)
-					*why = NAME_ERR_MULTIPLE_DELIMITERS;
-				return (-1);
-			}
-
-			found_delim = B_TRUE;
-		}
-
-		/* Zero-length components are not allowed */
-		if (start == end) {
-			if (why)
-				*why = NAME_ERR_EMPTY_COMPONENT;
-			return (-1);
-		}
-
-		/* If we've reached the end of the string, we're OK */
-		if (*end == '\0')
-			return (0);
-
-		/*
-		 * If there is a '/' in a snapshot or bookmark name
-		 * then report an error
-		 */
-		if (*end == '/' && found_delim != 0) {
-			if (why)
-				*why = NAME_ERR_TRAILING_SLASH;
-			return (-1);
-		}
-
-		/* Update to the next component */
-		start = end + 1;
-	}
-}
-
-/*
- * Dataset is any entity, except bookmark
- */
-int
-dataset_namecheck(const char *path, namecheck_err_t *why, char *what)
-{
-	int ret = entity_namecheck(path, why, what);
-
-	if (ret == 0 && strchr(path, '#') != NULL) {
-		if (why != NULL) {
-			*why = NAME_ERR_INVALCHAR;
-			*what = '#';
-		}
-		return (-1);
-	}
-
-	return (ret);
-}
-
-/*
- * mountpoint names must be of the following form:
- *
- *	/[component][/]*[component][/]
- *
- * Returns 0 on success, -1 on error.
- */
-int
-mountpoint_namecheck(const char *path, namecheck_err_t *why)
-{
-	const char *start, *end;
-
-	/*
-	 * Make sure none of the mountpoint component names are too long.
-	 * If a component name is too long then the mkdir of the mountpoint
-	 * will fail but then the mountpoint property will be set to a value
-	 * that can never be mounted.  Better to fail before setting the prop.
-	 * Extra slashes are OK, they will be tossed by the mountpoint mkdir.
-	 */
-
-	if (path == NULL || *path != '/') {
-		if (why)
-			*why = NAME_ERR_LEADING_SLASH;
-		return (-1);
-	}
-
-	/* Skip leading slash  */
-	start = &path[1];
-	do {
-		end = start;
-		while (*end != '/' && *end != '\0')
-			end++;
-
-		if (end - start >= ZFS_MAX_DATASET_NAME_LEN) {
-			if (why)
-				*why = NAME_ERR_TOOLONG;
-			return (-1);
-		}
-		start = end + 1;
-
-	} while (*end != '\0');
-
-	return (0);
-}
-
-/*
- * For pool names, we have the same set of valid characters as described in
- * dataset names, with the additional restriction that the pool name must begin
- * with a letter.  The pool names 'raidz' and 'mirror' are also reserved names
- * that cannot be used.
- *
- * Returns 0 on success, -1 on error.
- */
-int
-pool_namecheck(const char *pool, namecheck_err_t *why, char *what)
-{
-	const char *c;
-
-	/*
-	 * Make sure the name is not too long.
-	 * If we're creating a pool with version >= SPA_VERSION_DSL_SCRUB (v11)
-	 * we need to account for additional space needed by the origin ds which
-	 * will also be snapshotted: "poolname"+"/"+"$ORIGIN"+"@"+"$ORIGIN".
-	 * Play it safe and enforce this limit even if the pool version is < 11
-	 * so it can be upgraded without issues.
-	 */
-	if (strlen(pool) >= (ZFS_MAX_DATASET_NAME_LEN - 2 -
-	    strlen(ORIGIN_DIR_NAME) * 2)) {
-		if (why)
-			*why = NAME_ERR_TOOLONG;
-		return (-1);
-	}
-
-	c = pool;
-	while (*c != '\0') {
-		if (!valid_char(*c)) {
-			if (why) {
-				*why = NAME_ERR_INVALCHAR;
-				*what = *c;
-			}
-			return (-1);
-		}
-		c++;
-	}
-
-	if (!(*pool >= 'a' && *pool <= 'z') &&
-	    !(*pool >= 'A' && *pool <= 'Z')) {
-		if (why)
-			*why = NAME_ERR_NOLETTER;
-		return (-1);
-	}
-
-	if (strcmp(pool, "mirror") == 0 || strcmp(pool, "raidz") == 0) {
-		if (why)
-			*why = NAME_ERR_RESERVED;
-		return (-1);
-	}
-
-	if (pool[0] == 'c' && (pool[1] >= '0' && pool[1] <= '9')) {
-		if (why)
-			*why = NAME_ERR_DISKLIKE;
-		return (-1);
-	}
-
-	return (0);
-}