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- Add '-S' option, which allow to specify sector size for transparent

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provider.
- Bump version number.

This allows for a quite interesting trick. One can setup a stripe with
stripe size of 512 bytes and create transparent provider on top of it
with sector size equal to <ndisks> * 512. The result will be something
like RAID3 without parity disk (every access will touch all disks).
This commit is contained in:
Pawel Jakub Dawidek 2004-07-30 08:19:22 +00:00
parent abcbe24601
commit d5c96d389e
4 changed files with 26 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sbin/geom/class/nop/geom_nop.c
View File

@ -40,6 +40,7 @@ uint32_t version = G_NOP_VERSION;
static intmax_t failprob = 0;
static intmax_t offset = 0;
static intmax_t secsize = 0;
static intmax_t size = 0;
struct g_command class_commands[] = {
@ -48,6 +49,7 @@ struct g_command class_commands[] = {
{ 'f', "failprob", &failprob, G_TYPE_NUMBER },
{ 'o', "offset", &offset, G_TYPE_NUMBER },
{ 's', "size", &size, G_TYPE_NUMBER },
{ 'S', "secsize", &secsize, G_TYPE_NUMBER },
G_OPT_SENTINEL
}
},
@ -71,7 +73,7 @@ void
usage(const char *name)
{
fprintf(stderr, "usage: %s create [-v] [-f failprob] [-o offset] [-s size] <dev1> [dev2 [...]]\n", name);
fprintf(stderr, "usage: %s create [-v] [-f failprob] [-o offset] [-s size] [-S secsize] <dev1> [dev2 [...]]\n", name);
fprintf(stderr, " %s configure [-v] [-f failprob] <prov1> [prov2 [...]]\n", name);
fprintf(stderr, " %s destroy [-fv] <prov1> [prov2 [...]]\n", name);
}

3
sbin/geom/class/nop/gnop.8
View File

@ -37,6 +37,7 @@
.Op Fl f Ar failprob
.Op Fl o Ar offset
.Op Fl s Ar size
.Op Fl S Ar secsize
.Ar dev1
.Op Ar dev2 Op Ar ...
.Nm
@ -109,6 +110,8 @@ Specifies failure probability in percentage.
Where to begin on the original provider.
.It Fl s Ar size
Size of the transparent provider.
.It Fl S Ar secsize
Sector size of the transparent provider.
.It Fl v
Be more verbose.
.El

23
sys/geom/nop/g_nop.c
View File

@ -121,7 +121,7 @@ g_nop_access(struct g_provider *pp, int dr, int dw, int de)
static int
g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
u_int failprob, off_t offset, off_t size)
u_int failprob, off_t offset, off_t size, u_int secsize)
{
struct g_nop_softc *sc;
struct g_geom *gp;
@ -154,6 +154,12 @@ g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
gctl_error(req, "Invalid size for provider %s.", pp->name);
return (EINVAL);
}
if (secsize == 0)
secsize = pp->sectorsize;
else if ((secsize % pp->sectorsize) != 0) {
gctl_error(req, "Invalid secsize for provider %s.", pp->name);
return (EINVAL);
}
snprintf(name, sizeof(name), "%s%s", pp->name, G_NOP_SUFFIX);
LIST_FOREACH(gp, &mp->geom, geom) {
if (strcmp(gp->name, name) == 0) {
@ -183,7 +189,7 @@ g_nop_create(struct gctl_req *req, struct g_class *mp, struct g_provider *pp,
goto fail;
}
newpp->mediasize = size;
newpp->sectorsize = pp->sectorsize;
newpp->sectorsize = secsize;
cp = g_new_consumer(gp);
if (cp == NULL) {
@ -253,7 +259,7 @@ static void
g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
{
struct g_provider *pp;
intmax_t *failprob, *offset, *size;
intmax_t *failprob, *offset, *secsize, *size;
const char *name;
char param[16];
int i, *nargs;
@ -296,6 +302,15 @@ g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
gctl_error(req, "Invalid '%s' argument", "size");
return;
}
secsize = gctl_get_paraml(req, "secsize", sizeof(*secsize));
if (secsize == NULL) {
gctl_error(req, "No '%s' argument", "secsize");
return;
}
if (*secsize < 0) {
gctl_error(req, "Invalid '%s' argument", "secsize");
return;
}
for (i = 0; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
@ -313,7 +328,7 @@ g_nop_ctl_create(struct gctl_req *req, struct g_class *mp)
return;
}
if (g_nop_create(req, mp, pp, (u_int)*failprob, (off_t)*offset,
(off_t)*size) != 0) {
(off_t)*size, (u_int)*secsize) != 0) {
return;
}
}

2
sys/geom/nop/g_nop.h
View File

@ -30,7 +30,7 @@
#define _G_NOP_H_
#define G_NOP_CLASS_NAME "NOP"
#define G_NOP_VERSION 2
#define G_NOP_VERSION 3
#define G_NOP_SUFFIX ".nop"
#ifdef _KERNEL