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Add sysctl to control auto resize of the GEOM metadata.

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Reviewed by:	AllanJude
Differential Revision:	https://reviews.freebsd.org/D9603
This commit is contained in:
Mariusz Zaborski 2017-02-27 17:54:01 +00:00
parent 64e574c22d
commit 01ad653a81
2 changed files with 19 additions and 0 deletions
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12
sbin/geom/class/part/gpart.8
View File

@ -1146,6 +1146,18 @@ 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
This variable controls automatic resize behavior of
.Nm
GEOM class.
When this variable is enable and new size of provider is detected, the schema
metadata is resized but all changes are not saved to disk, until
.Cm gpart commit
is run to confirm changes.
This behavior is also reported with diagnostic message:
.Sy "GEOM_PART: (provider) was automatically resized."
.Sy "Use `gpart commit (provider)` to save changes or `gpart undo (provider)`"
.Sy "to revert them."
.It Va kern.geom.part.check_integrity : No 1
This variable controls the behaviour of metadata integrity checks.
When integrity checks are enabled, the

7
sys/geom/part/g_part.c
View File

@ -135,6 +135,10 @@ static u_int check_integrity = 1;
SYSCTL_UINT(_kern_geom_part, OID_AUTO, check_integrity,
CTLFLAG_RWTUN, &check_integrity, 1,
"Enable integrity checking");
static u_int auto_resize = 1;
SYSCTL_UINT(_kern_geom_part, OID_AUTO, auto_resize,
CTLFLAG_RW, &auto_resize, 1,
"Enable auto resize");
/*
* The GEOM partitioning class.
@ -2095,6 +2099,9 @@ g_part_resize(struct g_consumer *cp)
G_PART_TRACE((G_T_TOPOLOGY, "%s(%s)", __func__, cp->provider->name));
g_topology_assert();
if (auto_resize == 0)
return;
table = cp->geom->softc;
if (table->gpt_opened == 0) {
if (g_access(cp, 1, 1, 1) != 0)