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OpenZFS 6676 - Race between unique_insert() and unique_remove() causes ZFS fsid change

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Authored by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>
Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com>
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
Reviewed by: Dan Vatca <dan.vatca@gmail.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Sebastien Roy <sebastien.roy@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: George Melikov <mail@gmelikov.ru>

OpenZFS-issue: https://www.illumos.org/issues/6676
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/40510e8
Closes #5667
This commit is contained in:
George Melikov
2017-01-27 01:43:28 +03:00
committed by Brian Behlendorf
parent aeacdefedc
commit 39efbde7c5
9 changed files with 90 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/sa.c
+6 -4
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@@ -21,7 +21,7 @@
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013 by Delphix. All rights reserved.
* Copyright (c) 2016 by Delphix. All rights reserved.
* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
*/
@@ -1297,7 +1297,7 @@ sa_build_index(sa_handle_t *hdl, sa_buf_type_t buftype)
/*ARGSUSED*/
static void
sa_evict(void *dbu)
sa_evict_sync(void *dbu)
{
panic("evicting sa dbuf\n");
}
@@ -1394,7 +1394,8 @@ sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
sa_handle_t *winner = NULL;
handle = kmem_cache_alloc(sa_cache, KM_SLEEP);
handle->sa_dbu.dbu_evict_func = NULL;
handle->sa_dbu.dbu_evict_func_sync = NULL;
handle->sa_dbu.dbu_evict_func_async = NULL;
handle->sa_userp = userp;
handle->sa_bonus = db;
handle->sa_os = os;
@@ -1405,7 +1406,8 @@ sa_handle_get_from_db(objset_t *os, dmu_buf_t *db, void *userp,
error = sa_build_index(handle, SA_BONUS);
if (hdl_type == SA_HDL_SHARED) {
dmu_buf_init_user(&handle->sa_dbu, sa_evict, NULL);
dmu_buf_init_user(&handle->sa_dbu, sa_evict_sync, NULL,
NULL);
winner = dmu_buf_set_user_ie(db, &handle->sa_dbu);
}