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Implement MDIOCLIST which returns the unit numbers of configured md(4)

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devices.

We use the md_pad[] array and if there are more units than its size the
last returned unit number will be -1, but the number of units returned
is correct.
This commit is contained in:
Poul-Henning Kamp 2003-01-27 07:58:18 +00:00
parent b6532aa9a5
commit 16bcbe8cf7
1 changed files with 11 additions and 0 deletions
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11
sys/dev/md/md.c
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@ -1133,6 +1133,7 @@ mdctlioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct thread *td)
{
struct md_ioctl *mdio;
struct md_s *sc;
int i;
if (md_debug)
printf("mdctlioctl(%s %lx %p %x %p)\n",
@ -1195,6 +1196,16 @@ mdctlioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct thread *td)
break;
}
return (0);
case MDIOCLIST:
i = 1;
LIST_FOREACH(sc, &md_softc_list, list) {
if (i == MDNPAD - 1)
mdio->md_pad[i] = -1;
else
mdio->md_pad[i++] = sc->unit;
}
mdio->md_pad[0] = i - 1;
return (0);
default:
return (ENOIOCTL);
};