Author: mav
Date: Wed Oct 12 05:41:10 2016
New Revision: 307120
URL: https://svnweb.freebsd.org/changeset/base/307120

Log:
  MFC r305205: MFV r302657:
  4521 zfstest is trying to execute evil "zfs unmount -a"
  
  illumos/illumos-gate@8808ac5dae118369991f158b6ab736cb2691ecde
  
https://github.com/illumos/illumos-gate/commit/8808ac5dae118369991f158b6ab736cb2
  691ecde
  
  https://www.illumos.org/issues/4521
    zfstest is trying to execute evil "zfs unmount -a", which fails 
(fortunately,
    as it would otherwise leave me with my ~ missing):
    03:44:11.86 cannot unmount '/export/home/yuri': Device busy cannot unmount 
'/
    export/home': Device busy
    03:44:11.86 ERROR: /usr/sbin/zfs unmount -a exited 1
    This affects, at least, zfs_mount_009_neg and zfs_mount_all_001_pos, both
    failing on that step. The pool containing the /export/home hierarchy is
    included in KEEP variable, but it doesn't seem to affect anything here.
  
  Reviewed by: Andriy Gapon <a...@freebsd.org>
  Reviewed by: Dan McDonald <dan...@omniti.com>
  Reviewed by: Matthew Ahrens <mahr...@delphix.com>
  Reviewed by: John Kennedy <john.kenn...@delphix.com>
  Approved by: Robert Mustacchi <r...@joyent.com>
  Author: Yuri Pankov <yuri.pan...@nexenta.com>

Modified:
  stable/10/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
  stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
  stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c
  stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
==============================================================================
--- stable/10/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c       Wed Oct 12 
05:39:29 2016        (r307119)
+++ stable/10/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c       Wed Oct 12 
05:41:10 2016        (r307120)
@@ -27,9 +27,9 @@
  * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
  * Copyright (c) 2012 Martin Matuska <m...@freebsd.org>. All rights reserved.
  * Copyright (c) 2013 Steven Hartland.  All rights reserved.
- * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2014 Integros [integros.com]
  * Copyright 2016 Igor Kozhukhov <ikozhuk...@gmail.com>.
+ * Copyright 2016 Nexenta Systems, Inc.
  */
 
 #include <assert.h>
@@ -6469,6 +6469,15 @@ unshare_unmount(int op, int argc, char *
                                continue;
                        }
 
+                       /*
+                        * Ignore datasets that are excluded/restricted by
+                        * parent pool name.
+                        */
+                       if (zpool_skip_pool(zfs_get_pool_name(zhp))) {
+                               zfs_close(zhp);
+                               continue;
+                       }
+
                        switch (op) {
                        case OP_SHARE:
                                verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,

Modified: stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
==============================================================================
--- stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h       Wed Oct 
12 05:39:29 2016        (r307119)
+++ stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h       Wed Oct 
12 05:41:10 2016        (r307120)
@@ -26,8 +26,8 @@
  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  * Copyright (c) 2012 Martin Matuska <m...@freebsd.org>. All rights reserved.
  * Copyright (c) 2013 Steven Hartland. All rights reserved.
- * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2014 Integros [integros.com]
+ * Copyright 2016 Nexenta Systems, Inc.
  */
 
 #ifndef        _LIBZFS_H
@@ -221,6 +221,7 @@ extern void zpool_free_handles(libzfs_ha
  */
 typedef int (*zpool_iter_f)(zpool_handle_t *, void *);
 extern int zpool_iter(libzfs_handle_t *, zpool_iter_f, void *);
+extern boolean_t zpool_skip_pool(const char *);
 
 /*
  * Functions to create and destroy pools
@@ -411,6 +412,7 @@ extern void zfs_close(zfs_handle_t *);
 extern zfs_type_t zfs_get_type(const zfs_handle_t *);
 extern const char *zfs_get_name(const zfs_handle_t *);
 extern zpool_handle_t *zfs_get_pool_handle(const zfs_handle_t *);
+extern const char *zfs_get_pool_name(const zfs_handle_t *);
 
 /*
  * Property management functions.  Some functions are shared with the kernel,

Modified: stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c
==============================================================================
--- stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c        
Wed Oct 12 05:39:29 2016        (r307119)
+++ stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c        
Wed Oct 12 05:41:10 2016        (r307120)
@@ -27,6 +27,7 @@
 /*
  * Copyright (c) 2012 by Delphix. All rights reserved.
  * Copyright (c) 2015 by Syneto S.R.L. All rights reserved.
+ * Copyright 2016 Nexenta Systems, Inc.
  */
 
 /*
@@ -338,33 +339,47 @@ zpool_refresh_stats(zpool_handle_t *zhp,
 }
 
 /*
- * If the __ZFS_POOL_RESTRICT environment variable is set we only iterate over
- * pools it lists.
+ * The following environment variables are undocumented
+ * and should be used for testing purposes only:
  *
- * This is an undocumented feature for use during testing only.
+ * __ZFS_POOL_EXCLUDE - don't iterate over the pools it lists
+ * __ZFS_POOL_RESTRICT - iterate only over the pools it lists
  *
  * This function returns B_TRUE if the pool should be skipped
  * during iteration.
  */
-static boolean_t
-check_restricted(const char *poolname)
+boolean_t
+zpool_skip_pool(const char *poolname)
 {
        static boolean_t initialized = B_FALSE;
-       static char *restricted = NULL;
+       static const char *exclude = NULL;
+       static const char *restricted = NULL;
 
        const char *cur, *end;
-       int len, namelen;
+       int len;
+       int namelen = strlen(poolname);
 
        if (!initialized) {
                initialized = B_TRUE;
+               exclude = getenv("__ZFS_POOL_EXCLUDE");
                restricted = getenv("__ZFS_POOL_RESTRICT");
        }
 
+       if (exclude != NULL) {
+               cur = exclude;
+               do {
+                       end = strchr(cur, ' ');
+                       len = (NULL == end) ? strlen(cur) : (end - cur);
+                       if (len == namelen && 0 == strncmp(cur, poolname, len))
+                               return (B_TRUE);
+                       cur += (len + 1);
+               } while (NULL != end);
+       }
+
        if (NULL == restricted)
                return (B_FALSE);
 
        cur = restricted;
-       namelen = strlen(poolname);
        do {
                end = strchr(cur, ' ');
                len = (NULL == end) ? strlen(cur) : (end - cur);
@@ -402,7 +417,7 @@ zpool_iter(libzfs_handle_t *hdl, zpool_i
        for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL;
            cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) {
 
-               if (check_restricted(cn->cn_name))
+               if (zpool_skip_pool(cn->cn_name))
                        continue;
 
                if (zpool_open_silent(hdl, cn->cn_name, &zhp) != 0) {
@@ -440,7 +455,7 @@ zfs_iter_root(libzfs_handle_t *hdl, zfs_
        for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL;
            cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) {
 
-               if (check_restricted(cn->cn_name))
+               if (zpool_skip_pool(cn->cn_name))
                        continue;
 
                if ((zhp = make_dataset_handle(hdl, cn->cn_name)) == NULL)

Modified: stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c
==============================================================================
--- stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c       
Wed Oct 12 05:39:29 2016        (r307119)
+++ stable/10/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c       
Wed Oct 12 05:41:10 2016        (r307120)
@@ -27,9 +27,9 @@
  * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  * Copyright (c) 2013 Steven Hartland. All rights reserved.
- * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2014 Integros [integros.com]
  * Copyright 2016 Igor Kozhukhov <ikozhuk...@gmail.com>
+ * Copyright 2016 Nexenta Systems, Inc.
  */
 
 #include <ctype.h>
@@ -2945,6 +2945,15 @@ zfs_get_name(const zfs_handle_t *zhp)
 }
 
 /*
+ * Returns the name of the parent pool for the given zfs handle.
+ */
+const char *
+zfs_get_pool_name(const zfs_handle_t *zhp)
+{
+       return (zhp->zpool_hdl->zpool_name);
+}
+
+/*
  * Returns the type of the given zfs handle.
  */
 zfs_type_t
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