svn commit: r314359 - in head: sbin/geom/class/part sys/geom/part

[Mariusz Zaborski]

On Mon, Feb 27, 2017 at 05:54:01PM +0000, Mariusz Zaborski wrote:
> Author: oshogbo
> Date: Mon Feb 27 17:54:01 2017
> New Revision: 314359
> URL: https://svnweb.freebsd.org/changeset/base/314359
> 
> Log:
>   Add sysctl to control auto resize of the GEOM metadata.
>   
>   Reviewed by:	AllanJude
>   Differential Revision:	https://reviews.freebsd.org/D9603
Sorry, I think I should add:
Discussed with: ae

Sorry about that,
Mariusz Zaborski
> 
> Modified:
>   head/sbin/geom/class/part/gpart.8
>   head/sys/geom/part/g_part.c
> 
> Modified: head/sbin/geom/class/part/gpart.8
> ==============================================================================
> --- head/sbin/geom/class/part/gpart.8	Mon Feb 27 17:50:38 2017	(r314358)
> +++ head/sbin/geom/class/part/gpart.8	Mon Feb 27 17:54:01 2017	(r314359)
> @@ -1146,6 +1146,18 @@ variables can be used to control the beh
>  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
> 
> Modified: head/sys/geom/part/g_part.c
> ==============================================================================
> --- head/sys/geom/part/g_part.c	Mon Feb 27 17:50:38 2017	(r314358)
> +++ head/sys/geom/part/g_part.c	Mon Feb 27 17:54:01 2017	(r314359)
> @@ -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)
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