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Actually make use of the md_version field of 'struct mdio'. In order

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not to needlessly break compatibility, decrement MDIOVERSION to 0.

Approved by:	phk
This commit is contained in:
Dima Dorfman 2001-12-20 06:38:21 +00:00
parent 1a7c0630db
commit 53d745bc7c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=88249
3 changed files with 16 additions and 1 deletions
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2
sbin/mdconfig/mdconfig.c
View File

@ -161,6 +161,7 @@ main(int argc, char **argv)
usage();
}
}
mdio.md_version = MDIOVERSION;
mdmaybeload();
fd = open("/dev/" MDCTL_NAME, O_RDWR, 0);
@ -253,6 +254,7 @@ int
query(const int fd, const int unit)
{
mdio.md_version = MDIOVERSION;
mdio.md_unit = unit;
if (ioctl(fd, MDIOCQUERY, &mdio) < 0)

13
sys/dev/md/md.c
View File

@ -831,9 +831,18 @@ mdctlioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct thread *td)
printf("mdctlioctl(%s %lx %p %x %p)\n",
devtoname(dev), cmd, addr, flags, td);
/*
* We assert the version number in the individual ioctl
* handlers instead of out here because (a) it is possible we
* may add another ioctl in the future which doesn't read an
* mdio, and (b) the correct return value for an unknown ioctl
* is ENOIOCTL, not EINVAL.
*/
mdio = (struct md_ioctl *)addr;
switch (cmd) {
case MDIOCATTACH:
if (mdio->md_version != MDIOVERSION)
return (EINVAL);
switch (mdio->md_type) {
case MD_MALLOC:
return (mdcreate_malloc(mdio));
@ -847,11 +856,15 @@ mdctlioctl(dev_t dev, u_long cmd, caddr_t addr, int flags, struct thread *td)
return (EINVAL);
}
case MDIOCDETACH:
if (mdio->md_version != MDIOVERSION)
return (EINVAL);
if (mdio->md_file != NULL || mdio->md_size != 0 ||
mdio->md_options != 0)
return (EINVAL);
return (mddetach(mdio->md_unit, td));
case MDIOCQUERY:
if (mdio->md_version != MDIOVERSION)
return (EINVAL);
sc = mdfind(mdio->md_unit);
if (sc == NULL)
return (ENOENT);

2
sys/sys/mdioctl.h
View File

@ -66,7 +66,7 @@ struct md_ioctl {
#define MD_NAME "md"
#define MDCTL_NAME "mdctl"
#define MDIOVERSION 1
#define MDIOVERSION 0
/*
* Before you can use a unit, it must be configured with MDIOCSET.