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| author | Kyle Evans <kevans@FreeBSD.org> | 2019-09-03 20:57:20 +0000 |
|---|---|---|
| committer | Kyle Evans <kevans@FreeBSD.org> | 2019-09-03 20:57:20 +0000 |
| commit | ef03f57dd201827cc74615571c410273e49a5964 (patch) | |
| tree | 817841551cbdd7b5ab38853f4cd816fb400f6830 /lib/geom | |
| parent | dca52ab480bfe71c3dc1d86822e551a7d1c9ec72 (diff) | |
| download | src-ef03f57dd201827cc74615571c410273e49a5964.tar.gz src-ef03f57dd201827cc74615571c410273e49a5964.zip | |
Allow more nesting of GEOM partitioning schemes
GEOM is supposed to be topology-agnostic, but the GPT and BSD partition code
has arbitrary restrictions on nesting that are annoying in cases such as
running VMs on raw partitions (since the VM's partitioning scheme is not
visible to the host).
This patch adds sysctls to disable the restrictions except in the case of
BSD label (and similar) partitions with offset 0 (where we need to avoid
recursively recognizing the label).
Submitted by: Andrew Gierth
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D21350
Notes
Notes:
svn path=/head/; revision=351797
Diffstat (limited to 'lib/geom')
| -rw-r--r-- | lib/geom/part/gpart.8 | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/geom/part/gpart.8 b/lib/geom/part/gpart.8 index 80ea0a317d3a..a19f06dd67be 100644 --- a/lib/geom/part/gpart.8 +++ b/lib/geom/part/gpart.8 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd June 17, 2018 +.Dd September 3, 2019 .Dt GPART 8 .Os .Sh NAME @@ -1207,7 +1207,13 @@ variables can be used to control the behavior of the GEOM class. The default value is shown next to each variable. .Bl -tag -width indent -.It Va kern.geom.part.auto_resize: No 1 +.It Va kern.geom.part.allow_nesting : No 0 +By default, some schemes (currently BSD, BSD64 and VTOC8) do not permit +further nested partitioning. +This variable overrides this restriction and allows arbitrary nesting (except +within partitions created at offset 0). +Some schemes have their own separate checks, for which see below. +.It Va kern.geom.part.auto_resize : No 1 This variable controls automatic resize behavior of .Nm GEOM class. @@ -1228,6 +1234,9 @@ disk metadata. If some inconsistency is detected, the partition table will be rejected with a diagnostic message: .Sy "GEOM_PART: Integrity check failed (provider, scheme)" . +.It Va kern.geom.part.gpt.allow_nesting : No 0 +By default the GPT scheme is allowed only at the outermost nesting level. +This variable allows this restriction to be removed. .It Va kern.geom.part.ldm.debug : No 0 Debug level of the Logical Disk Manager (LDM) module. This can be set to a number between 0 and 2 inclusive. |