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Illumos 6414 - vdev_config_sync could be simpler 

6414 vdev_config_sync could be simpler
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>

References:
  https://www.illumos.org/issues/6414
  https://github.com/illumos/illumos-gate/commit/eb5bb58

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
This commit is contained in:
Brian Behlendorf 2016-01-26 17:27:46 -08:00
parent 1a04bab348
commit b6fcb792ca
3 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/sys/vdev.h
View File

@ -121,8 +121,7 @@ extern void vdev_queue_io_done(zio_t *zio);
extern void vdev_config_dirty(vdev_t *vd); extern void vdev_config_dirty(vdev_t *vd);
extern void vdev_config_clean(vdev_t *vd); extern void vdev_config_clean(vdev_t *vd);
extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
boolean_t);
extern void vdev_state_dirty(vdev_t *vd); extern void vdev_state_dirty(vdev_t *vd);
extern void vdev_state_clean(vdev_t *vd); extern void vdev_state_clean(vdev_t *vd);

10
module/zfs/spa.c
View File

@ -6518,16 +6518,10 @@ spa_sync(spa_t *spa, uint64_t txg)
if (svdcount == SPA_DVAS_PER_BP) if (svdcount == SPA_DVAS_PER_BP)
break; break;
} }
error = vdev_config_sync(svd, svdcount, txg, B_FALSE); error = vdev_config_sync(svd, svdcount, txg);
if (error != 0)
error = vdev_config_sync(svd, svdcount, txg,
B_TRUE);
} else { } else {
error = vdev_config_sync(rvd->vdev_child, error = vdev_config_sync(rvd->vdev_child,
rvd->vdev_children, txg, B_FALSE); rvd->vdev_children, txg);
if (error != 0)
error = vdev_config_sync(rvd->vdev_child,
rvd->vdev_children, txg, B_TRUE);
} }
if (error == 0) if (error == 0)

19
module/zfs/vdev_label.c
View File

@ -1187,15 +1187,16 @@ vdev_label_sync_list(spa_t *spa, int l, uint64_t txg, int flags)
* at any time, you can just call it again, and it will resume its work. * at any time, you can just call it again, and it will resume its work.
*/ */
int int
vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, boolean_t tryhard) vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg)
{ {
spa_t *spa = svd[0]->vdev_spa; spa_t *spa = svd[0]->vdev_spa;
uberblock_t *ub = &spa->spa_uberblock; uberblock_t *ub = &spa->spa_uberblock;
vdev_t *vd; vdev_t *vd;
zio_t *zio; zio_t *zio;
int error; int error = 0;
int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL; int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL;
retry:
/* /*
* Normally, we don't want to try too hard to write every label and * Normally, we don't want to try too hard to write every label and
* uberblock. If there is a flaky disk, we don't want the rest of the * uberblock. If there is a flaky disk, we don't want the rest of the
@ -1203,8 +1204,11 @@ vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, boolean_t tryhard)
* single label out, we should retry with ZIO_FLAG_TRYHARD before * single label out, we should retry with ZIO_FLAG_TRYHARD before
* bailing out and declaring the pool faulted. * bailing out and declaring the pool faulted.
*/ */
if (tryhard) if (error != 0) {
if ((flags & ZIO_FLAG_TRYHARD) != 0)
return (error);
flags |= ZIO_FLAG_TRYHARD; flags |= ZIO_FLAG_TRYHARD;
}
ASSERT(ub->ub_txg <= txg); ASSERT(ub->ub_txg <= txg);
@ -1248,7 +1252,7 @@ vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, boolean_t tryhard)
* are committed to stable storage before the uberblock update. * are committed to stable storage before the uberblock update.
*/ */
if ((error = vdev_label_sync_list(spa, 0, txg, flags)) != 0) if ((error = vdev_label_sync_list(spa, 0, txg, flags)) != 0)
return (error); goto retry;
/* /*
* Sync the uberblocks to all vdevs in svd[]. * Sync the uberblocks to all vdevs in svd[].
@ -1266,7 +1270,7 @@ vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, boolean_t tryhard)
* to the new uberblocks. * to the new uberblocks.
*/ */
if ((error = vdev_uberblock_sync_list(svd, svdcount, ub, flags)) != 0) if ((error = vdev_uberblock_sync_list(svd, svdcount, ub, flags)) != 0)
return (error); goto retry;
/* /*
* Sync out odd labels for every dirty vdev. If the system dies * Sync out odd labels for every dirty vdev. If the system dies
@ -1278,5 +1282,8 @@ vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, boolean_t tryhard)
* to disk to ensure that all odd-label updates are committed to * to disk to ensure that all odd-label updates are committed to
* stable storage before the next transaction group begins. * stable storage before the next transaction group begins.
*/ */
return (vdev_label_sync_list(spa, 1, txg, flags)); if ((error = vdev_label_sync_list(spa, 1, txg, flags)) != 0)
goto retry;
return (0);
} }