NEX-19178 Changing the NFS export path makes the SMB share offline
Reviewed by: Evan Layton <evan.layton@nexenta.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Matt Barden <matt.barden@nexenta.com>
NEX-15279 support NFS server in zone
NEX-15520 online NFS shares cause zoneadm halt to hang in nfs_export_zone_fini
Portions contributed by: Dan Kruchinin dan.kruchinin@nexenta.com
Portions contributed by: Stepan Zastupov stepan.zastupov@gmail.com
Reviewed by: Joyce McIntosh <joyce.mcintosh@nexenta.com>
Reviewed by: Rob Gittins <rob.gittins@nexenta.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>

@@ -20,21 +20,23 @@
  */
 
 /*
  * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  */
+
 /*
- * Copyright 2012 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
  * Copyright 2017 RackTop Systems.
+ * Copyright 2019 Nexenta Systems, Inc.
  */
 
 #include <stdio.h>
 #include <libzfs.h>
 #include <string.h>
 #include <strings.h>
 #include <errno.h>
+#include <zone.h>
 #include <libshare.h>
 #include "libshare_impl.h"
 #include <libintl.h>
 #include <sys/mnttab.h>
 #include <sys/mntent.h>

@@ -236,10 +238,11 @@
 get_legacy_mountpoint(const char *path, char *dataset, size_t dlen,
     char *mountpoint, size_t mlen)
 {
         FILE *fp;
         struct mnttab entry;
+        int rc = 1;
 
         if ((fp = fopen(MNTTAB, "r")) == NULL) {
                 return (1);
         }
 

@@ -254,15 +257,16 @@
                                 (void) strlcpy(mountpoint, entry.mnt_mountp,
                                     mlen);
                         if (dlen > 0)
                                 (void) strlcpy(dataset, entry.mnt_special,
                                     dlen);
+                        rc = 0;
                         break;
                 }
         }
         (void) fclose(fp);
-        return (1);
+        return (rc);
 }
 
 
 /*
  * Verifies that a specific zfs filesystem handle meets the criteria necessary

@@ -815,10 +819,17 @@
          */
 
         if (!zfs_is_mounted(fs_handle, NULL))
                 return (SA_SYSTEM_ERR);
 
+        /*
+         * Ignore "zoned" datasets in global zone.
+         */
+        if (getzoneid() == GLOBAL_ZONEID &&
+            zfs_prop_get_int(fs_handle, ZFS_PROP_ZONED))
+                return (SA_SYSTEM_ERR);
+
         nfs = nfs_inherited = B_FALSE;
 
         if (zfs_prop_get(fs_handle, ZFS_PROP_SHARENFS, nfsshareopts,
             sizeof (nfsshareopts), &source, nfssourcestr,
             ZFS_MAXPROPLEN, B_FALSE) == 0 &&

@@ -973,10 +984,33 @@
          * pointer to a cached value that will be freed when
          * sa_fini() is called.
          */
         return (err);
 }
+
+/*
+ * Initializes shares for only the dataset specified fs_handle.
+ * This is used as a performance optimization relative to sa_get_zfs_shares.
+ */
+int
+sa_get_zfs_share(sa_handle_t handle, char *groupname, zfs_handle_t *fs_handle)
+{
+        sa_group_t zfsgroup;
+        libzfs_handle_t *zfs_libhandle;
+        int err;
+
+        if ((err = prep_zfs_handle_and_group(handle, groupname, &zfs_libhandle,
+            &zfsgroup, &err)) != SA_OK) {
+                return (err);
+        }
+        /* Not an error, this could be a legacy condition */
+        if (zfsgroup == NULL)
+                return (SA_OK);
+
+        err = sa_get_zfs_share_common(handle, fs_handle, NULL, zfsgroup);
+        return (err);
+}
 
 /*
  * Initializes only the handles specified in the sharearg for use with libshare.
  * This is used as a performance optimization relative to sa_get_zfs_shares.
  */