91a3f3588a
While geom_flashmap has always supported label names for its slices, it does so by appending "s.labelname" to the provider device name, meaning you still have to know the name and unit of the hardware device to use the labels. These changes add support for device-independent geom_flashmap labels, using the standard geom_label infrastructure. geom_flashmap now creates a softc struct attached to its geom, and as it creates slices it stores the label into an array in the softc. The new geom_label_flashmap uses those labels when tasting a geom_flashmap provider. Differential Revision: https://reviews.freebsd.org/D19535
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/slicer.h>
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#include <geom/geom.h>
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#include <geom/geom_flashmap.h>
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#include <geom/geom_slice.h>
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#include <geom/label/g_label.h>
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#define G_LABEL_FLASHMAP_SLICE_DIR "flash"
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static void
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g_label_flashmap_taste(struct g_consumer *cp, char *label, size_t size)
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{
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struct g_flashmap *gfp;
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struct g_slicer *gsp;
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struct g_provider *pp;
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g_topology_assert_not();
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pp = cp->provider;
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label[0] = '\0';
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/* We taste only partitions handled by flashmap */
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if (strncmp(pp->geom->class->name, FLASHMAP_CLASS_NAME,
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sizeof(FLASHMAP_CLASS_NAME)) != 0)
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return;
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gsp = (struct g_slicer *)pp->geom->softc;
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gfp = (struct g_flashmap *)gsp->softc;
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/* If it's handled by flashmap it should have a label, but be safe. */
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if (gfp->labels[pp->index] == NULL)
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return;
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strlcpy(label, gfp->labels[pp->index], size);
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}
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struct g_label_desc g_label_flashmap = {
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.ld_taste = g_label_flashmap_taste,
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.ld_dir = G_LABEL_FLASHMAP_SLICE_DIR,
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.ld_enabled = 1
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};
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G_LABEL_INIT(flashmap, g_label_flashmap, "Create device nodes for Flashmap labels");
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