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Lock the interface address list while iterating a network interface's

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address list when searching for a link-layer address to use during uuid
generation.

MFC after:	2 weeks
This commit is contained in:
Robert Watson 2009-04-19 21:36:18 +00:00
parent 22037b2d2c
commit e5a9a8ead8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=191279
1 changed files with 3 additions and 0 deletions
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3
sys/kern/kern_uuid.c
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@ -101,16 +101,19 @@ uuid_node(uint16_t *node)
IFNET_RLOCK();
TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
/* Walk the address list */
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
sdl = (struct sockaddr_dl*)ifa->ifa_addr;
if (sdl != NULL && sdl->sdl_family == AF_LINK &&
sdl->sdl_type == IFT_ETHER) {
/* Got a MAC address. */
bcopy(LLADDR(sdl), node, UUID_NODE_LEN);
IF_ADDR_UNLOCK(ifp);
IFNET_RUNLOCK();
return;
}
}
IF_ADDR_UNLOCK(ifp);
}
IFNET_RUNLOCK();