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Serialize ZTHR operations to eliminate races

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Adds a new lock for serializing operations on zthrs.
The commit also includes some code cleanup and
refactoring.

Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #8229
This commit is contained in:
Serapheim Dimitropoulos
2019-01-13 10:09:46 -08:00
committed by Brian Behlendorf
parent 83c796c5e9
commit 61c3391acc
7 changed files with 192 additions and 130 deletions
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include/sys/spa_checkpoint.h
+1 -1
View File
@@ -37,7 +37,7 @@ int spa_checkpoint(const char *);
int spa_checkpoint_discard(const char *);
boolean_t spa_checkpoint_discard_thread_check(void *, zthr_t *);
int spa_checkpoint_discard_thread(void *, zthr_t *);
void spa_checkpoint_discard_thread(void *, zthr_t *);
int spa_checkpoint_get_stats(spa_t *, pool_checkpoint_stat_t *);
include/sys/zthr.h
+3 -19
View File
@@ -14,42 +14,26 @@
*/
/*
* Copyright (c) 2017 by Delphix. All rights reserved.
* Copyright (c) 2017, 2018 by Delphix. All rights reserved.
*/
#ifndef _SYS_ZTHR_H
#define _SYS_ZTHR_H
typedef struct zthr zthr_t;
typedef int (zthr_func_t)(void *, zthr_t *);
typedef void (zthr_func_t)(void *, zthr_t *);
typedef boolean_t (zthr_checkfunc_t)(void *, zthr_t *);
struct zthr {
kthread_t *zthr_thread;
kmutex_t zthr_lock;
kcondvar_t zthr_cv;
boolean_t zthr_cancel;
hrtime_t zthr_wait_time;
zthr_checkfunc_t *zthr_checkfunc;
zthr_func_t *zthr_func;
void *zthr_arg;
int zthr_rc;
};
extern zthr_t *zthr_create(zthr_checkfunc_t checkfunc,
zthr_func_t *func, void *arg);
extern zthr_t *zthr_create_timer(zthr_checkfunc_t *checkfunc,
zthr_func_t *func, void *arg, hrtime_t nano_wait);
extern void zthr_exit(zthr_t *t, int rc);
extern void zthr_destroy(zthr_t *t);
extern void zthr_wakeup(zthr_t *t);
extern int zthr_cancel(zthr_t *t);
extern void zthr_cancel(zthr_t *t);
extern void zthr_resume(zthr_t *t);
extern boolean_t zthr_iscancelled(zthr_t *t);
extern boolean_t zthr_isrunning(zthr_t *t);
#endif /* _SYS_ZTHR_H */