1 files changed, 366 insertions, 0 deletions
diff --git a/lib/libshare/libshare.c b/lib/libshare/libshare.c
new file mode 100644
index 000000000000..d32a282a36e3
--- /dev/null
+++ b/lib/libshare/libshare.c
@@ -0,0 +1,366 @@
+/*
+ * 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 (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011 Gunnar Beutner
+ * Copyright (c) 2018, 2020 by Delphix. All rights reserved.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <strings.h>
+#include <libintl.h>
+#include <sys/file.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <libzfs.h>
+#include <libshare.h>
+#include "libzfs_impl.h"
+#include "libshare_impl.h"
+#include "nfs.h"
+#include "smb.h"
+
+static sa_share_impl_t alloc_share(const char *zfsname, const char *path);
+static void free_share(sa_share_impl_t share);
+
+static int fstypes_count;
+static sa_fstype_t *fstypes;
+
+sa_fstype_t *
+register_fstype(const char *name, const sa_share_ops_t *ops)
+{
+	sa_fstype_t *fstype;
+
+	fstype = calloc(1, sizeof (sa_fstype_t));
+
+	if (fstype == NULL)
+		return (NULL);
+
+	fstype->name = name;
+	fstype->ops = ops;
+	fstype->fsinfo_index = fstypes_count;
+
+	fstypes_count++;
+
+	fstype->next = fstypes;
+	fstypes = fstype;
+
+	return (fstype);
+}
+
+__attribute__((constructor)) static void
+libshare_init(void)
+{
+	libshare_nfs_init();
+	libshare_smb_init();
+}
+
+int
+sa_enable_share(const char *zfsname, const char *mountpoint,
+    const char *shareopts, char *protocol)
+{
+	int rc, ret = SA_OK;
+	boolean_t found_protocol = B_FALSE;
+	sa_fstype_t *fstype;
+
+	sa_share_impl_t impl_share = alloc_share(zfsname, mountpoint);
+	if (impl_share == NULL)
+		return (SA_NO_MEMORY);
+
+	fstype = fstypes;
+	while (fstype != NULL) {
+		if (strcmp(fstype->name, protocol) == 0) {
+
+			rc = fstype->ops->update_shareopts(impl_share,
+			    shareopts);
+			if (rc != SA_OK)
+				break;
+
+			rc = fstype->ops->enable_share(impl_share);
+			if (rc != SA_OK)
+				ret = rc;
+
+			found_protocol = B_TRUE;
+		}
+
+		fstype = fstype->next;
+	}
+	free_share(impl_share);
+
+	return (found_protocol ? ret : SA_INVALID_PROTOCOL);
+}
+
+int
+sa_disable_share(const char *mountpoint, char *protocol)
+{
+	int rc, ret = SA_OK;
+	boolean_t found_protocol = B_FALSE;
+	sa_fstype_t *fstype;
+
+	sa_share_impl_t impl_share = alloc_share(NULL, mountpoint);
+	if (impl_share == NULL)
+		return (SA_NO_MEMORY);
+
+	fstype = fstypes;
+	while (fstype != NULL) {
+		if (strcmp(fstype->name, protocol) == 0) {
+
+			rc = fstype->ops->disable_share(impl_share);
+			if (rc != SA_OK)
+				ret = rc;
+
+			found_protocol = B_TRUE;
+		}
+
+		fstype = fstype->next;
+	}
+	free_share(impl_share);
+
+	return (found_protocol ? ret : SA_INVALID_PROTOCOL);
+}
+
+boolean_t
+sa_is_shared(const char *mountpoint, char *protocol)
+{
+	sa_fstype_t *fstype;
+	boolean_t ret = B_FALSE;
+
+	/* guid value is not used */
+	sa_share_impl_t impl_share = alloc_share(NULL, mountpoint);
+	if (impl_share == NULL)
+		return (B_FALSE);
+
+	fstype = fstypes;
+	while (fstype != NULL) {
+		if (strcmp(fstype->name, protocol) == 0) {
+			ret = fstype->ops->is_shared(impl_share);
+		}
+		fstype = fstype->next;
+	}
+	free_share(impl_share);
+	return (ret);
+}
+
+void
+sa_commit_shares(const char *protocol)
+{
+	sa_fstype_t *fstype = fstypes;
+	while (fstype != NULL) {
+		if (strcmp(fstype->name, protocol) == 0)
+			fstype->ops->commit_shares();
+		fstype = fstype->next;
+	}
+}
+
+/*
+ * sa_errorstr(err)
+ *
+ * convert an error value to an error string
+ */
+char *
+sa_errorstr(int err)
+{
+	static char errstr[32];
+	char *ret = NULL;
+
+	switch (err) {
+	case SA_OK:
+		ret = dgettext(TEXT_DOMAIN, "ok");
+		break;
+	case SA_NO_SUCH_PATH:
+		ret = dgettext(TEXT_DOMAIN, "path doesn't exist");
+		break;
+	case SA_NO_MEMORY:
+		ret = dgettext(TEXT_DOMAIN, "no memory");
+		break;
+	case SA_DUPLICATE_NAME:
+		ret = dgettext(TEXT_DOMAIN, "name in use");
+		break;
+	case SA_BAD_PATH:
+		ret = dgettext(TEXT_DOMAIN, "bad path");
+		break;
+	case SA_NO_SUCH_GROUP:
+		ret = dgettext(TEXT_DOMAIN, "no such group");
+		break;
+	case SA_CONFIG_ERR:
+		ret = dgettext(TEXT_DOMAIN, "configuration error");
+		break;
+	case SA_SYSTEM_ERR:
+		ret = dgettext(TEXT_DOMAIN, "system error");
+		break;
+	case SA_SYNTAX_ERR:
+		ret = dgettext(TEXT_DOMAIN, "syntax error");
+		break;
+	case SA_NO_PERMISSION:
+		ret = dgettext(TEXT_DOMAIN, "no permission");
+		break;
+	case SA_BUSY:
+		ret = dgettext(TEXT_DOMAIN, "busy");
+		break;
+	case SA_NO_SUCH_PROP:
+		ret = dgettext(TEXT_DOMAIN, "no such property");
+		break;
+	case SA_INVALID_NAME:
+		ret = dgettext(TEXT_DOMAIN, "invalid name");
+		break;
+	case SA_INVALID_PROTOCOL:
+		ret = dgettext(TEXT_DOMAIN, "invalid protocol");
+		break;
+	case SA_NOT_ALLOWED:
+		ret = dgettext(TEXT_DOMAIN, "operation not allowed");
+		break;
+	case SA_BAD_VALUE:
+		ret = dgettext(TEXT_DOMAIN, "bad property value");
+		break;
+	case SA_INVALID_SECURITY:
+		ret = dgettext(TEXT_DOMAIN, "invalid security type");
+		break;
+	case SA_NO_SUCH_SECURITY:
+		ret = dgettext(TEXT_DOMAIN, "security type not found");
+		break;
+	case SA_VALUE_CONFLICT:
+		ret = dgettext(TEXT_DOMAIN, "property value conflict");
+		break;
+	case SA_NOT_IMPLEMENTED:
+		ret = dgettext(TEXT_DOMAIN, "not implemented");
+		break;
+	case SA_INVALID_PATH:
+		ret = dgettext(TEXT_DOMAIN, "invalid path");
+		break;
+	case SA_NOT_SUPPORTED:
+		ret = dgettext(TEXT_DOMAIN, "operation not supported");
+		break;
+	case SA_PROP_SHARE_ONLY:
+		ret = dgettext(TEXT_DOMAIN, "property not valid for group");
+		break;
+	case SA_NOT_SHARED:
+		ret = dgettext(TEXT_DOMAIN, "not shared");
+		break;
+	case SA_NO_SUCH_RESOURCE:
+		ret = dgettext(TEXT_DOMAIN, "no such resource");
+		break;
+	case SA_RESOURCE_REQUIRED:
+		ret = dgettext(TEXT_DOMAIN, "resource name required");
+		break;
+	case SA_MULTIPLE_ERROR:
+		ret = dgettext(TEXT_DOMAIN, "errors from multiple protocols");
+		break;
+	case SA_PATH_IS_SUBDIR:
+		ret = dgettext(TEXT_DOMAIN, "path is a subpath of share");
+		break;
+	case SA_PATH_IS_PARENTDIR:
+		ret = dgettext(TEXT_DOMAIN, "path is parent of a share");
+		break;
+	case SA_NO_SECTION:
+		ret = dgettext(TEXT_DOMAIN, "protocol requires a section");
+		break;
+	case SA_NO_PROPERTIES:
+		ret = dgettext(TEXT_DOMAIN, "properties not found");
+		break;
+	case SA_NO_SUCH_SECTION:
+		ret = dgettext(TEXT_DOMAIN, "section not found");
+		break;
+	case SA_PASSWORD_ENC:
+		ret = dgettext(TEXT_DOMAIN, "passwords must be encrypted");
+		break;
+	case SA_SHARE_EXISTS:
+		ret = dgettext(TEXT_DOMAIN, "path or file is already shared");
+		break;
+	default:
+		(void) snprintf(errstr, sizeof (errstr),
+		    dgettext(TEXT_DOMAIN, "unknown %d"), err);
+		ret = errstr;
+	}
+	return (ret);
+}
+
+int
+sa_validate_shareopts(char *options, char *proto)
+{
+	sa_fstype_t *fstype;
+
+	fstype = fstypes;
+	while (fstype != NULL) {
+		if (strcmp(fstype->name, proto) != 0) {
+			fstype = fstype->next;
+			continue;
+		}
+
+		return (fstype->ops->validate_shareopts(options));
+	}
+
+	return (SA_INVALID_PROTOCOL);
+}
+
+static sa_share_impl_t
+alloc_share(const char *zfsname, const char *mountpoint)
+{
+	sa_share_impl_t impl_share;
+
+	impl_share = calloc(1, sizeof (struct sa_share_impl));
+
+	if (impl_share == NULL)
+		return (NULL);
+
+	if (mountpoint != NULL &&
+	    ((impl_share->sa_mountpoint = strdup(mountpoint)) == NULL)) {
+		free(impl_share);
+		return (NULL);
+	}
+
+	if (zfsname != NULL &&
+	    ((impl_share->sa_zfsname = strdup(zfsname)) == NULL)) {
+		free(impl_share->sa_mountpoint);
+		free(impl_share);
+		return (NULL);
+	}
+
+	impl_share->sa_fsinfo = calloc(fstypes_count,
+	    sizeof (sa_share_fsinfo_t));
+	if (impl_share->sa_fsinfo == NULL) {
+		free(impl_share->sa_mountpoint);
+		free(impl_share->sa_zfsname);
+		free(impl_share);
+		return (NULL);
+	}
+
+	return (impl_share);
+}
+
+static void
+free_share(sa_share_impl_t impl_share)
+{
+	sa_fstype_t *fstype;
+
+	fstype = fstypes;
+	while (fstype != NULL) {
+		fstype->ops->clear_shareopts(impl_share);
+		fstype = fstype->next;
+	}
+
+	free(impl_share->sa_mountpoint);
+	free(impl_share->sa_zfsname);
+	free(impl_share->sa_fsinfo);
+	free(impl_share);
+}