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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
include/sys/dmu.h
+17 -7
View File
@@ -549,8 +549,14 @@ typedef struct dmu_buf_user {
*/
taskq_ent_t dbu_tqent;
/* This instance's eviction function pointer. */
dmu_buf_evict_func_t *dbu_evict_func;
/*
* This instance's eviction function pointers.
*
* dbu_evict_func_sync is called synchronously and then
* dbu_evict_func_async is executed asynchronously on a taskq.
*/
dmu_buf_evict_func_t *dbu_evict_func_sync;
dmu_buf_evict_func_t *dbu_evict_func_async;
#ifdef ZFS_DEBUG
/*
* Pointer to user's dbuf pointer. NULL for clients that do
@@ -572,12 +578,16 @@ typedef struct dmu_buf_user {
*/
/*ARGSUSED*/
static inline void
dmu_buf_init_user(dmu_buf_user_t *dbu, dmu_buf_evict_func_t *evict_func,
dmu_buf_t **clear_on_evict_dbufp)
dmu_buf_init_user(dmu_buf_user_t *dbu, dmu_buf_evict_func_t *evict_func_sync,
dmu_buf_evict_func_t *evict_func_async, dmu_buf_t **clear_on_evict_dbufp)
{
ASSERT(dbu->dbu_evict_func == NULL);
ASSERT(evict_func != NULL);
dbu->dbu_evict_func = evict_func;
ASSERT(dbu->dbu_evict_func_sync == NULL);
ASSERT(dbu->dbu_evict_func_async == NULL);
/* must have at least one evict func */
IMPLY(evict_func_sync == NULL, evict_func_async != NULL);
dbu->dbu_evict_func_sync = evict_func_sync;
dbu->dbu_evict_func_async = evict_func_async;
taskq_init_ent(&dbu->dbu_tqent);
#ifdef ZFS_DEBUG
dbu->dbu_clear_on_evict_dbufp = clear_on_evict_dbufp;