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Add a OAM interface for changing the label and writing the boot code.

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This commit is contained in:
Poul-Henning Kamp 2003-05-03 08:01:34 +00:00
parent bc93b4de0e
commit a767c3daa3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114568
1 changed files with 126 additions and 26 deletions
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152
sys/geom/geom_bsd.c
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@ -230,6 +230,54 @@ g_bsd_try(struct g_geom *gp, struct g_slicer *gsp, struct g_consumer *cp, int se
return (error);
}
/*
* This function writes the current label to disk, possibly updating
* the alpha SRM checksum.
*/
static int
g_bsd_writelabel(struct g_geom *gp, u_char *bootcode)
{
off_t secoff;
u_int secsize;
struct g_consumer *cp;
struct g_slicer *gsp;
struct g_bsd_softc *ms;
u_char *buf;
uint64_t sum;
int error, i;
gsp = gp->softc;
ms = gsp->softc;
cp = LIST_FIRST(&gp->consumer);
/* Get sector size, we need it to read data. */
secsize = cp->provider->sectorsize;
secoff = ms->labeloffset % secsize;
if (bootcode == NULL) {
buf = g_read_data(cp, ms->labeloffset - secoff, secsize, &error);
if (buf == NULL || error != 0)
return (error);
bcopy(ms->label, buf + secoff, sizeof(ms->label));
} else {
buf = bootcode;
bcopy(ms->label, buf + ms->labeloffset, sizeof(ms->label));
}
if (ms->labeloffset == ALPHA_LABEL_OFFSET) {
sum = 0;
for (i = 0; i < 63; i++)
sum += le64dec(buf + i * 8);
le64enc(buf + 504, sum);
}
if (bootcode == NULL) {
error = g_write_data(cp, ms->labeloffset - secoff, buf, secsize);
g_free(buf);
} else {
error = g_write_data(cp, 0, bootcode, BBSIZE);
}
return(error);
}
/*
* Implement certain ioctls to modify disklabels with. This function
* is called by the event handler thread with topology locked as result
@ -246,12 +294,8 @@ g_bsd_ioctl(void *arg, int flag)
struct g_slicer *gsp;
struct g_bsd_softc *ms;
struct g_ioctl *gio;
struct g_consumer *cp;
u_char *buf, *label;
off_t secoff;
u_int secsize;
int error, i;
uint64_t sum;
u_char *label;
int error;
g_topology_assert();
bp = arg;
@ -279,26 +323,7 @@ g_bsd_ioctl(void *arg, int flag)
}
KASSERT(gio->cmd == DIOCWDINFO, ("Unknown ioctl in g_bsd_ioctl"));
cp = LIST_FIRST(&gp->consumer);
/* Get sector size, we need it to read data. */
secsize = cp->provider->sectorsize;
secoff = ms->labeloffset % secsize;
buf = g_read_data(cp, ms->labeloffset - secoff, secsize, &error);
if (buf == NULL || error != 0) {
g_io_deliver(bp, error);
return;
}
bcopy(ms->label, buf + secoff, sizeof(ms->label));
if (ms->labeloffset == ALPHA_LABEL_OFFSET) {
sum = 0;
for (i = 0; i < 63; i++)
sum += le64dec(buf + i * 8);
le64enc(buf + 504, sum);
}
error = g_write_data(cp, ms->labeloffset - secoff, buf, secsize);
g_free(buf);
g_io_deliver(bp, error);
g_io_deliver(bp, g_bsd_writelabel(gp, NULL));
}
/*
@ -641,10 +666,85 @@ g_bsd_taste(struct g_class *mp, struct g_provider *pp, int flags)
return (NULL);
}
struct h0h0 {
struct g_geom *gp;
struct g_bsd_softc *ms;
u_char *label;
int error;
};
static void
g_bsd_callconfig(void *arg, int flag)
{
struct h0h0 *hp;
hp = arg;
hp->error = g_bsd_modify(hp->gp, hp->label);
if (!hp->error)
hp->error = g_bsd_writelabel(hp->gp, NULL);
}
/*
* NB! curthread is user process which GCTL'ed.
*/
static int
g_bsd_config(struct gctl_req *req, struct g_geom *gp, const char *verb)
{
u_char *label;
int error, i;
struct h0h0 h0h0;
struct g_slicer *gsp;
struct g_consumer *cp;
i = 0;
g_topology_assert();
cp = LIST_FIRST(&gp->consumer);
gsp = gp->softc;
if (!strcmp(verb, "write label")) {
label = gctl_get_paraml(req, "label", LABELSIZE);
if (label == NULL)
return (EINVAL);
h0h0.gp = gp;
h0h0.ms = gsp->softc;
h0h0.label = label;
h0h0.error = -1;
/* XXX: Does this reference register with our selfdestruct code ? */
error = g_access_rel(cp, 1, 1, 1);
if (error) {
g_free(label);
return (error);
}
g_topology_unlock();
g_waitfor_event(g_bsd_callconfig, &h0h0, M_WAITOK, gp, NULL);
g_topology_lock();
error = h0h0.error;
g_access_rel(cp, -1, -1, -1);
g_free(label);
} else if (!strcmp(verb, "write bootcode")) {
label = gctl_get_paraml(req, "bootcode", BBSIZE);
if (label == NULL)
return (EINVAL);
/* XXX: Does this reference register with our selfdestruct code ? */
error = g_access_rel(cp, 1, 1, 1);
if (error) {
g_free(label);
return (error);
}
error = g_bsd_writelabel(gp, label);
g_access_rel(cp, -1, -1, -1);
g_free(label);
} else {
return (gctl_error(req, "Unknown verb parameter"));
}
return (error);
}
/* Finally, register with GEOM infrastructure. */
static struct g_class g_bsd_class = {
.name = BSD_CLASS_NAME,
.taste = g_bsd_taste,
.config_geom = g_bsd_config,
G_CLASS_INITIALIZER
};