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Support device-independent labels for geom_flashmap slices.

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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
This commit is contained in:
Ian Lepore 2019-03-24 19:11:45 +00:00
parent 37b807ff36
commit 91a3f3588a
6 changed files with 131 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sys/conf/files
View File

@ -3628,6 +3628,7 @@ geom/journal/g_journal.c optional geom_journal
geom/journal/g_journal_ufs.c optional geom_journal
geom/label/g_label.c optional geom_label | geom_label_gpt
geom/label/g_label_ext2fs.c optional geom_label
geom/label/g_label_flashmap.c optional geom_label
geom/label/g_label_iso9660.c optional geom_label
geom/label/g_label_msdosfs.c optional geom_label
geom/label/g_label_ntfs.c optional geom_label

21
sys/geom/geom_flashmap.c
View File

@ -39,13 +39,12 @@ __FBSDID("$FreeBSD$");
#include <sys/slicer.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
#include <geom/geom_disk.h>
#include <geom/geom_flashmap.h>
#include <geom/geom_slice.h>
#include <dev/nand/nand_dev.h>
#define FLASHMAP_CLASS_NAME "Flashmap"
struct g_flashmap_slice {
off_t sl_start;
off_t sl_end;
@ -71,8 +70,8 @@ static g_taste_t g_flashmap_taste;
static int g_flashmap_load(device_t dev, struct g_provider *pp,
flash_slicer_t slicer, struct g_flashmap_head *head);
static int g_flashmap_modify(struct g_geom *gp, const char *devname,
int secsize, struct g_flashmap_head *slices);
static int g_flashmap_modify(struct g_flashmap *gfp, struct g_geom *gp,
const char *devname, int secsize, struct g_flashmap_head *slices);
static void g_flashmap_print(struct g_flashmap_slice *slice);
MALLOC_DECLARE(M_FLASHMAP);
@ -88,8 +87,8 @@ g_flashmap_print(struct g_flashmap_slice *slice)
}
static int
g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize,
struct g_flashmap_head *slices)
g_flashmap_modify(struct g_flashmap *gfp, struct g_geom *gp,
const char *devname, int secsize, struct g_flashmap_head *slices)
{
struct g_flashmap_slice *slice;
int i, error;
@ -114,6 +113,8 @@ g_flashmap_modify(struct g_geom *gp, const char *devname, int secsize,
i = 0;
STAILQ_FOREACH(slice, slices, sl_link) {
free(__DECONST(void *, gfp->labels[i]), M_FLASHMAP);
gfp->labels[i] = strdup(slice->sl_name, M_FLASHMAP);
error = g_slice_config(gp, i++, G_SLICE_CONFIG_SET,
slice->sl_start,
slice->sl_end - slice->sl_start + 1,
@ -153,6 +154,7 @@ g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
struct g_consumer *cp;
struct g_flashmap_head head;
struct g_flashmap_slice *slice, *slice_temp;
struct g_flashmap *gfp;
flash_slicer_t slicer;
device_t dev;
int i, size;
@ -164,7 +166,8 @@ g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
strcmp(pp->geom->class->name, G_DISK_CLASS_NAME) != 0)
return (NULL);
gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, NULL, 0, NULL);
gp = g_slice_new(mp, FLASH_SLICES_MAX_NUM, pp, &cp, (void**)&gfp,
sizeof(struct g_flashmap), NULL);
if (gp == NULL)
return (NULL);
@ -186,7 +189,7 @@ g_flashmap_taste(struct g_class *mp, struct g_provider *pp, int flags)
if (g_flashmap_load(dev, pp, slicer, &head) == 0)
break;
g_flashmap_modify(gp, cp->provider->name,
g_flashmap_modify(gfp, gp, cp->provider->name,
cp->provider->sectorsize, &head);
} while (0);

39
sys/geom/geom_flashmap.h Normal file
View File

@ -0,0 +1,39 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _GEOM_GEOM_FLASHMAP_H_
#define FLASHMAP_CLASS_NAME "Flashmap"
struct g_flashmap {
const char *labels[FLASH_SLICES_MAX_NUM];
};
#endif

1
sys/geom/label/g_label.c
View File

@ -95,6 +95,7 @@ const struct g_label_desc *g_labels[] = {
&g_label_reiserfs,
&g_label_ntfs,
&g_label_disk_ident,
&g_label_flashmap,
#endif
NULL
};

1
sys/geom/label/g_label.h
View File

@ -88,6 +88,7 @@ extern struct g_label_desc g_label_ntfs;
extern struct g_label_desc g_label_gpt;
extern struct g_label_desc g_label_gpt_uuid;
extern struct g_label_desc g_label_disk_ident;
extern struct g_label_desc g_label_flashmap;
extern void g_label_rtrim(char *label, size_t size);
#endif /* _KERNEL */

77
sys/geom/label/g_label_flashmap.c Normal file
View File

@ -0,0 +1,77 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/slicer.h>
#include <geom/geom.h>
#include <geom/geom_flashmap.h>
#include <geom/geom_slice.h>
#include <geom/label/g_label.h>
#define G_LABEL_FLASHMAP_SLICE_DIR "flash"
static void
g_label_flashmap_taste(struct g_consumer *cp, char *label, size_t size)
{
struct g_flashmap *gfp;
struct g_slicer *gsp;
struct g_provider *pp;
g_topology_assert_not();
pp = cp->provider;
label[0] = '\0';
/* We taste only partitions handled by flashmap */
if (strncmp(pp->geom->class->name, FLASHMAP_CLASS_NAME,
sizeof(FLASHMAP_CLASS_NAME)) != 0)
return;
gsp = (struct g_slicer *)pp->geom->softc;
gfp = (struct g_flashmap *)gsp->softc;
/* If it's handled by flashmap it should have a label, but be safe. */
if (gfp->labels[pp->index] == NULL)
return;
strlcpy(label, gfp->labels[pp->index], size);
}
struct g_label_desc g_label_flashmap = {
.ld_taste = g_label_flashmap_taste,
.ld_dir = G_LABEL_FLASHMAP_SLICE_DIR,
.ld_enabled = 1
};
G_LABEL_INIT(flashmap, g_label_flashmap, "Create device nodes for Flashmap labels");