diff options
| author | Alek P <[email protected]> | 2017-07-06 22:16:13 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2017-07-06 22:16:13 -0700 |
| commit | 0ea05c64f8d08c20439dd2a06e949a2aa4115101 (patch) | |
| tree | 28c543bbb096dfdb9809c754722445fa699d6ec4 /include/sys/dsl_scan.h | |
| parent | 94b25662c51696ec081494e69efb5896566dede2 (diff) | |
Implemented zpool scrub pause/resume
Currently, there is no way to pause a scrub. Pausing may
be useful when the pool is busy with other I/O to preserve
bandwidth.
This patch adds the ability to pause and resume scrubbing.
This is achieved by maintaining a persistent on-disk scrub state.
While the state is 'paused' we do not scrub any more blocks.
We do however perform regular scan housekeeping such as
freeing async destroyed and deadlist blocks while paused.
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: Thomas Caputi <[email protected]>
Reviewed-by: Serapheim Dimitropoulos <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Alek Pinchuk <[email protected]>
Closes #6167
Diffstat (limited to 'include/sys/dsl_scan.h')
| -rw-r--r-- | include/sys/dsl_scan.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/include/sys/dsl_scan.h b/include/sys/dsl_scan.h index 44a11ba57..5303d9a69 100644 --- a/include/sys/dsl_scan.h +++ b/include/sys/dsl_scan.h @@ -21,6 +21,7 @@ /* * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012, 2014 by Delphix. All rights reserved. + * Copyright (c) 2017 Datto Inc. */ #ifndef _SYS_DSL_SCAN_H @@ -70,6 +71,7 @@ typedef struct dsl_scan_phys { typedef enum dsl_scan_flags { DSF_VISIT_DS_AGAIN = 1<<0, + DSF_SCRUB_PAUSED = 1<<1, } dsl_scan_flags_t; #define DSL_SCAN_FLAGS_MASK (DSF_VISIT_DS_AGAIN) @@ -84,8 +86,8 @@ typedef enum dsl_scan_flags { * * The following members of this structure direct the behavior of the scan: * - * scn_pausing - a scan that cannot be completed in a single txg or - * has exceeded its allotted time will need to pause. + * scn_suspending - a scan that cannot be completed in a single txg or + * has exceeded its allotted time will need to suspend. * When this flag is set the scanner will stop traversing * the pool and write out the current state to disk. * @@ -107,7 +109,7 @@ typedef enum dsl_scan_flags { typedef struct dsl_scan { struct dsl_pool *scn_dp; - boolean_t scn_pausing; + boolean_t scn_suspending; uint64_t scn_restart_txg; uint64_t scn_done_txg; uint64_t scn_sync_start_time; @@ -117,8 +119,6 @@ typedef struct dsl_scan { boolean_t scn_is_bptree; boolean_t scn_async_destroying; boolean_t scn_async_stalled; - - /* for debugging / information */ uint64_t scn_visited_this_txg; dsl_scan_phys_t scn_phys; @@ -129,6 +129,8 @@ void dsl_scan_fini(struct dsl_pool *dp); void dsl_scan_sync(struct dsl_pool *, dmu_tx_t *); int dsl_scan_cancel(struct dsl_pool *); int dsl_scan(struct dsl_pool *, pool_scan_func_t); +boolean_t dsl_scan_scrubbing(const struct dsl_pool *dp); +int dsl_scrub_set_pause_resume(const struct dsl_pool *dp, pool_scrub_cmd_t cmd); void dsl_resilver_restart(struct dsl_pool *, uint64_t txg); boolean_t dsl_scan_resilvering(struct dsl_pool *dp); boolean_t dsl_dataset_unstable(struct dsl_dataset *ds); @@ -139,6 +141,7 @@ void dsl_scan_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx); void dsl_scan_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2, struct dmu_tx *tx); boolean_t dsl_scan_active(dsl_scan_t *scn); +boolean_t dsl_scan_is_paused_scrub(const dsl_scan_t *scn); #ifdef __cplusplus } |