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Clean up consistency checks in if_setflag():

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. use KASSERT for all checks so that the source of an error can be detected;
. use __func__ instead of spelling function name each time;
. fix a typo.
This commit is contained in:
Yaroslav Tykhiy 2005-10-03 02:14:51 +00:00
parent 7aebc5e86e
commit b5c8bd5924
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=150845
1 changed files with 12 additions and 19 deletions
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31
sys/net/if.c
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@ -1594,7 +1594,7 @@ ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
/*
* The code common to handling reference counted flags,
* e.g., in ifpromisc() and if_allmulti().
* The "pflag" argument can specify a permanent mode flag,
* The "pflag" argument can specify a permanent mode flag to check,
* such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
*
* Only to be used on stack-owned flags, not driver-owned flags.
@ -1606,25 +1606,18 @@ if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
int error;
int oldflags, oldcount;
KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
("if_setflag: setting driver-ownded flag %d", flag));
/* Sanity checks to catch programming errors */
if (onswitch) {
if (*refcount < 0) {
if_printf(ifp,
"refusing to increment negative refcount %d "
"for interface flag %d\n", *refcount, flag);
return (EINVAL);
}
} else {
if (*refcount <= 0) {
if_printf(ifp,
"refusing to decrement non-positive refcount %d"
"for interface flag %d\n", *refcount, flag);
return (EINVAL);
}
}
KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
("%s: setting driver-owned flag %d", __func__, flag));
if (onswitch)
KASSERT(*refcount >= 0,
("%s: increment negative refcount %d for flag %d",
__func__, *refcount, flag));
else
KASSERT(*refcount > 0,
("%s: decrement non-positive refcount %d for flag %d",
__func__, *refcount, flag));
/* In case this mode is permanent, just touch refcount */
if (ifp->if_flags & pflag) {