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[geom_redboot] Extend geom_redboot to handle non-zero fis offset.

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Submitted by:	Mori Hiroki <yamori813@yahoo.co.jp>
Differential Revision:	https://reviews.freebsd.org/D7237
This commit is contained in:
Adrian Chadd 2016-10-04 16:35:38 +00:00
parent 452bd5bf51
commit 85ab1aeccf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=306678
1 changed files with 13 additions and 1 deletions
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14
sys/geom/geom_redboot.c
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@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
#include <sys/bio.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/sbuf.h>
#include <geom/geom.h>
@ -246,6 +247,16 @@ g_redboot_taste(struct g_class *mp, struct g_provider *pp, int insist)
u_int blksize; /* NB: flash block size stored as stripesize */
u_char *buf;
off_t offset;
const char *value;
char *op;
offset = 0;
if (resource_string_value("redboot", 0, "fisoffset", &value) == 0) {
offset = strtouq(value, &op, 0);
if (*op != '\0') {
offset = 0;
}
}
g_trace(G_T_TOPOLOGY, "redboot_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
@ -278,7 +289,8 @@ g_redboot_taste(struct g_class *mp, struct g_provider *pp, int insist)
return (NULL);
g_topology_unlock();
head = NULL;
offset = cp->provider->mediasize - blksize;
if(offset == 0)
offset = cp->provider->mediasize - blksize;
again:
buf = g_read_data(cp, offset, blksize, NULL);
if (buf != NULL)