/*
* Allocate an inode in the file system.
*
* we leave the actual allocation strategy to the (modified)
* ext2_new_inode(), to make sure we get the policies right
*/
int
ext2_valloc(struct vnode *pvp, int mode, struct ucred *cred, struct vnode **vpp)
{
struct inode *pip;
struct ext2_sb_info *fs;
struct inode *ip;
ino_t ino;
int i, error;
*vpp = NULL;
pip = VTOI(pvp);
fs = pip->i_e2fs;
if (fs->s_es->s_free_inodes_count == 0)
goto noinodes;
/* call the Linux routine - it returns the inode number only */
ino = ext2_new_inode(pip, mode);
if (ino == 0)
goto noinodes;
error = VFS_VGET(pvp->v_mount, NULL, ino, vpp);
if (error) {
EXT2_VFREE(pvp, ino, mode);
return (error);
}
ip = VTOI(*vpp);
/*
the question is whether using VGET was such good idea at all -
Linux doesn't read the old inode in when it's allocating a
new one. I will set at least i_size & i_blocks the zero.
*/
ip->i_mode = 0;
ip->i_size = 0;
ip->i_blocks = 0;
ip->i_flags = 0;
/* now we want to make sure that the block pointers are zeroed out */
for (i = 0; i < NDADDR; i++)
ip->i_db[i] = 0;
for (i = 0; i < NIADDR; i++)
ip->i_ib[i] = 0;
/*
* Set up a new generation number for this inode.
* XXX check if this makes sense in ext2
*/
if (ip->i_gen == 0 || ++ip->i_gen == 0)
ip->i_gen = krandom() / 2 + 1;
/*
kprintf("ext2_valloc: allocated inode %d\n", ino);
*/
return (0);
noinodes:
ext2_fserr(fs, cred->cr_uid, "out of inodes");
uprintf("\n%s: create/symlink failed, no inodes free\n", fs->fs_fsmnt);
return (ENOSPC);
}
/*
* IP6 initialization: fill in IP6 protocol switch table.
* All protocols not implemented in kernel go to raw IP6 protocol handler.
*/
void
ip6_init(void)
{
struct protosw *pr;
int i;
struct timeval tv;
pr = pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
if (pr == NULL)
panic("ip6_init");
for (i = 0; i < IPPROTO_MAX; i++)
ip6_protox[i] = pr - inet6sw;
for (pr = inet6domain.dom_protosw;
pr < inet6domain.dom_protoswNPROTOSW; pr++)
if (pr->pr_domain->dom_family == PF_INET6 &&
pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
ip6_protox[pr->pr_protocol] = pr - inet6sw;
inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
inet6_pfil_hook.ph_af = AF_INET6;
if ((i = pfil_head_register(&inet6_pfil_hook)) != 0) {
kprintf("%s: WARNING: unable to register pfil hook, "
"error %d\n", __func__, i);
}
netisr_register(NETISR_IPV6, ip6_input, NULL); /* XXX cpufn */
scope6_init();
addrsel_policy_init();
nd6_init();
frag6_init();
/*
* in many cases, random() here does NOT return random number
* as initialization during bootstrap time occur in fixed order.
*/
microtime(&tv);
ip6_flow_seq = krandom() ^ tv.tv_usec;
microtime(&tv);
ip6_desync_factor = (krandom() ^ tv.tv_usec) % MAX_TEMP_DESYNC_FACTOR;
}
int
trndlevel(KNable *knable)
{
int level = 0;
int max;
if (knable->level == SLHEIGHT - 1)
max = SLHEIGHT - 1;
else
/* Dirty Hack. */
max = knable->level + 1;
while (krandom() < SLPROB && level < max)
level++;
return level;
}