d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Prevent ZFS TRIM breaking VTOC8 partitions

Browse Source 
Update the ZFS TRIM code to ensure it respects VTOC8 partition headers as
documented by the ZFS On-Disk Specification section 1.3

Before this a zpool create on a VTOC8 partitioned device would overwrite the
partition metadata.

Reported by:	marius
Reviewed by:	marius agv
MFC after:	1 week
Sponsored by:	Multiplay
This commit is contained in:
Steven Hartland 2018-03-14 21:21:03 +00:00
parent f287c3e4d3
commit a59e720e65
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_label.c
View File

@ -802,7 +802,9 @@ vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason)
}
/*
* TRIM the whole thing so that we start with a clean slate.
* TRIM the whole thing, excluding the blank space and boot header
* as specified by ZFS On-Disk Specification (section 1.3), so that
* we start with a clean slate.
* It's just an optimization, so we don't care if it fails.
* Don't TRIM if removing so that we don't interfere with zpool
* disaster recovery.
@ -810,7 +812,8 @@ vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason)
if (zfs_trim_enabled && vdev_trim_on_init && !vd->vdev_notrim &&
(reason == VDEV_LABEL_CREATE || reason == VDEV_LABEL_SPARE ||
reason == VDEV_LABEL_L2CACHE))
zio_wait(zio_trim(NULL, spa, vd, 0, vd->vdev_psize));
zio_wait(zio_trim(NULL, spa, vd, VDEV_SKIP_SIZE,
vd->vdev_psize - VDEV_SKIP_SIZE));
/*
* Initialize its label.