long
netifread(struct netif *nif, struct chan *c, void *a, long n, uint32_t offset)
{
int i, j;
struct netfile *f;
char *p;
if (c->qid.type & QTDIR)
return devdirread(c, a, n, (struct dirtab *)nif, 0, netifgen);
switch (NETTYPE(c->qid.path)) {
case Ndataqid:
f = nif->f[NETID(c->qid.path)];
return qread(f->in, a, n);
case Nctlqid:
return readnum(offset, a, n, NETID(c->qid.path), NUMSIZE);
case Nstatqid:
p = kzmalloc(READSTR, 0);
if (p == NULL)
return 0;
j = snprintf(p, READSTR, "in: %d\n", nif->inpackets);
j += snprintf(p + j, READSTR - j, "link: %d\n", nif->link);
j += snprintf(p + j, READSTR - j, "out: %d\n", nif->outpackets);
j += snprintf(p + j, READSTR - j, "crc errs: %d\n", nif->crcs);
j += snprintf(p + j, READSTR - j, "overflows: %d\n",
nif->overflows);
j += snprintf(p + j, READSTR - j, "soft overflows: %d\n",
nif->soverflows);
j += snprintf(p + j, READSTR - j, "framing errs: %d\n",
nif->frames);
j += snprintf(p + j, READSTR - j, "buffer errs: %d\n", nif->buffs);
j += snprintf(p + j, READSTR - j, "output errs: %d\n", nif->oerrs);
j += snprintf(p + j, READSTR - j, "prom: %d\n", nif->prom);
j += snprintf(p + j, READSTR - j, "mbps: %d\n", nif->mbps);
j += snprintf(p + j, READSTR - j, "addr: ");
for (i = 0; i < nif->alen; i++)
j += snprintf(p + j, READSTR - j, "%02.2x", nif->addr[i]);
snprintf(p + j, READSTR - j, "\n");
n = readstr(offset, a, n, p);
kfree(p);
return n;
case Naddrqid:
p = kzmalloc(READSTR, 0);
if (p == NULL)
return 0;
j = 0;
for (i = 0; i < nif->alen; i++)
j += snprintf(p + j, READSTR - j, "%02.2x", nif->addr[i]);
n = readstr(offset, a, n, p);
kfree(p);
return n;
case Ntypeqid:
f = nif->f[NETID(c->qid.path)];
return readnum(offset, a, n, f->type, NUMSIZE);
case Nifstatqid:
return 0;
}
error(Ebadarg);
return -1; /* not reached */
}
void ipifcinit(struct Fs *f)
{
struct Proto *ipifc;
ipifc = kzmalloc(sizeof(struct Proto), 0);
ipifc->name = "ipifc";
ipifc->connect = ipifcconnect;
ipifc->announce = NULL;
ipifc->bind = ipifcbind;
ipifc->state = ipifcstate;
ipifc->create = ipifccreate;
ipifc->close = ipifcclose;
ipifc->rcv = NULL;
ipifc->ctl = ipifcctl;
ipifc->advise = NULL;
ipifc->stats = ipifcstats;
ipifc->inuse = ipifcinuse;
ipifc->local = ipifclocal;
ipifc->ipproto = -1;
ipifc->nc = Maxmedia;
ipifc->ptclsize = sizeof(struct Ipifc);
f->ipifc = ipifc; /* hack for ipifcremroute, findipifc, ... */
f->self = kzmalloc(sizeof(struct Ipselftab), 0); /* hack for ipforme */
qlock_init(&f->self->qlock);
Fsproto(f, ipifc);
}
/*
* add to self routing cache
* called with c locked
*/
static void
addselfcache(struct Fs *f, struct Ipifc *ifc,
struct Iplifc *lifc, uint8_t * a, int type)
{
struct Ipself *p;
struct Iplink *lp;
int h;
qlock(&f->self->qlock);
/* see if the address already exists */
h = hashipa(a);
for (p = f->self->hash[h]; p; p = p->next)
if (memcmp(a, p->a, IPaddrlen) == 0)
break;
/* allocate a local address and add to hash chain */
if (p == NULL) {
p = kzmalloc(sizeof(*p), 0);
ipmove(p->a, a);
p->type = type;
p->next = f->self->hash[h];
f->self->hash[h] = p;
/* if the null address, accept all packets */
if (ipcmp(a, v4prefix) == 0 || ipcmp(a, IPnoaddr) == 0)
f->self->acceptall = 1;
}
/* look for a link for this lifc */
for (lp = p->link; lp; lp = lp->selflink)
if (lp->lifc == lifc)
break;
/* allocate a lifc-to-local link and link to both */
if (lp == NULL) {
lp = kzmalloc(sizeof(*lp), 0);
kref_init(&lp->ref, fake_release, 1);
lp->lifc = lifc;
lp->self = p;
lp->selflink = p->link;
p->link = lp;
lp->lifclink = lifc->link;
lifc->link = lp;
/* add to routing table */
if (isv4(a))
v4addroute(f, tifc, a + IPv4off, IPallbits + IPv4off, a + IPv4off,
type);
else
v6addroute(f, tifc, a, IPallbits, a, type);
if ((type & Rmulti) && ifc->m->addmulti != NULL)
(*ifc->m->addmulti) (ifc, a, lifc->local);
} else {
kref_get(&lp->ref, 1);
}
qunlock(&f->self->qlock);
}
struct cname *newcname(char *s)
{
struct cname *n;
int i;
n = kzmalloc(sizeof(*n), 0);
i = strlen(s);
n->len = i;
n->alen = i + CNAMESLOP;
n->s = kzmalloc(n->alen, 0);
memmove(n->s, s, i + 1);
kref_init(&n->ref, __cname_release, 1);
return n;
}
static int growfd(struct fgrp *f, int fd)
{
int n;
struct chan **nfd, **ofd;
if (fd < f->nfd) {
return 0;
}
/* want to grow by a reasonable amount (delta), but also make sure we can
* handle the fd we're asked for */
n = MAX(f->nfd, fd + 1) + DELTAFD;
if (n > MAXNFD)
n = MAXNFD;
if (fd >= n) {
set_errno(EMFILE);
set_errstr("Asked for FD %d, more than %d\n", fd, MAXNFD);
return -1;
}
nfd = kzmalloc(n * sizeof(struct chan *), 0);
if (nfd == NULL) {
set_errno(ENOMEM);
set_errstr("Failed to growfd for FD %d, OOM\n", fd);
return -1;
}
ofd = f->fd;
memmove(nfd, ofd, f->nfd * sizeof(struct chan *));
f->fd = nfd;
f->nfd = n;
kfree(ofd);
return 0;
}
STATIC int
fat_open(filesystem *fs, const char *path, fs_handle *out, int fl, mode_t mode)
{
fat_fs_device_data *d = (fat_fs_device_data *) fs->device_data;
fat_entry *e = fat_search_entry(d->hdr, d->type, path);
if (!e)
return -ENOENT; /* file not found */
fat_file_handle *h = kzmalloc(sizeof(fat_file_handle));
if (!h)
return -ENOMEM;
h->fs = fs;
h->fops.read = fat_read;
h->fops.seek = fat_seek;
h->fops.stat = fat_stat64;
h->fops.write = NULL;
h->fops.exlock = fat_file_exlock;
h->fops.exunlock = fat_file_exunlock;
h->fops.shlock = fat_file_shlock;
h->fops.shunlock = fat_file_shunlock;
h->e = e;
h->pos = 0;
h->curr_cluster = fat_get_first_cluster(e);
*out = h;
return 0;
}
static struct route *allocroute(int type)
{
struct route *r;
int n;
struct route **l;
if (type & Rv4) {
n = sizeof(struct RouteTree) + sizeof(struct V4route);
l = &v4freelist;
} else {
n = sizeof(struct RouteTree) + sizeof(struct V6route);
l = &v6freelist;
}
r = *l;
if (r != NULL) {
*l = r->rt.mid;
} else {
r = kzmalloc(n, 0);
if (r == NULL)
panic("out of routing nodes");
}
memset(r, 0, n);
r->rt.type = type;
r->rt.ifc = NULL;
kref_init(&r->rt.kref, fake_release, 1);
return r;
}
static int rootwstat(struct chan *c, uint8_t *m_buf, int m_buf_sz)
{
struct dirtab *file = &roottab[c->qid.path];
struct dir *dir;
int m_sz;
/* TODO: some security check, Eperm on error */
/* common trick in wstats. we want the dir and any strings in the M. the
* strings are smaller than entire M (strings plus other M). the strings
* will be placed right after the dir (dir[1]) */
dir = kzmalloc(sizeof(struct dir) + m_buf_sz, KMALLOC_WAIT);
m_sz = convM2D(m_buf, m_buf_sz, &dir[0], (char*)&dir[1]);
if (!m_sz) {
kfree(dir);
error(ENODATA, ERROR_FIXME);
}
/* TODO: handle more things than just the mode */
if (!emptystr(dir->name))
printk("[%s] attempted rename of %s to %s\n", __FUNCTION__,
file->name, dir->name); /* strncpy for this btw */
if (dir->mode != ~0UL)
file->perm = dir->mode | (file->qid.type == QTDIR ? DMDIR : 0);
kfree(dir);
return m_sz;
}
/*
* parse a command written to a device
*/
struct cmdbuf *parsecmd(char *p, int n)
{
ERRSTACK(1);
struct cmdbuf *volatile cb;
int nf;
char *sp;
nf = ncmdfield(p, n);
/* allocate Cmdbuf plus string pointers plus copy of string including \0 */
sp = kzmalloc(sizeof(*cb) + nf * sizeof(char *) + n + 1, 0);
cb = (struct cmdbuf *)sp;
cb->f = (char **)(&cb[1]);
cb->buf = (char *)(&cb->f[nf]);
if (current != NULL && waserror()) {
kfree(cb);
nexterror();
}
memmove(cb->buf, p, n);
if (current != NULL)
poperror();
/* dump new line and null terminate */
if (n > 0 && cb->buf[n - 1] == '\n')
n--;
cb->buf[n] = '\0';
cb->nf = tokenize(cb->buf, cb->f, nf - 1);
cb->f[cb->nf] = NULL;
return cb;
}
int netifwstat(struct ether *nif, struct chan *c, uint8_t * db, int n)
{
struct dir *dir;
struct netfile *f;
int m;
f = nif->f[NETID(c->qid.path)];
if (f == 0) {
set_errno(ENOENT);
error(Enonexist);
}
if (netown(f, current->user, OWRITE) < 0)
error(Eperm);
dir = kzmalloc(sizeof(struct dir) + n, 0);
m = convM2D(db, n, &dir[0], (char *)&dir[1]);
if (m == 0) {
kfree(dir);
error(Eshortstat);
}
if (!emptystr(dir[0].uid))
strncpy(f->owner, dir[0].uid, KNAMELEN);
if (dir[0].mode != ~0UL)
f->mode = dir[0].mode;
kfree(dir);
return m;
}
static int pipewstat(struct chan *c, uint8_t *dp, int n)
{
ERRSTACK(2);
struct dir *d;
Pipe *p;
int d1;
if (c->qid.type & QTDIR)
error(EPERM, ERROR_FIXME);
p = c->aux;
if (strcmp(current->user, p->user) != 0)
error(EPERM, ERROR_FIXME);
d = kzmalloc(sizeof(*d) + n, 0);
if (waserror()) {
kfree(d);
nexterror();
}
n = convM2D(dp, n, d, (char *)&d[1]);
if (n == 0)
error(ENODATA, ERROR_FIXME);
d1 = NETTYPE(c->qid.path) == Qdata1;
if (!emptystr(d->name)) {
validwstatname(d->name);
if (strlen(d->name) >= KNAMELEN)
error(ENAMETOOLONG, ERROR_FIXME);
if (strncmp(p->pipedir[1 + !d1].name, d->name, KNAMELEN) == 0)
error(EEXIST, ERROR_FIXME);
strncpy(p->pipedir[1 + d1].name, d->name, KNAMELEN);
}
if (d->mode != ~0UL)
p->pipedir[d1 + 1].perm = d->mode & 0777;
poperror();
kfree(d);
return n;
}
/* add a capability, throwing out any old ones */
static void addcap(uint8_t *hash)
{
struct Caphash *p, *t, **l;
p = kzmalloc(sizeof(*p), 0);
memmove(p->hash, hash, Hashlen);
p->next = NULL;
qlock(&capalloc.qlock);
/* trim extras */
while (capalloc.nhash >= Maxhash) {
t = capalloc.first;
if (t == NULL)
panic("addcap");
capalloc.first = t->next;
kfree(t);
capalloc.nhash--;
}
/* add new one */
for (l = &capalloc.first; *l != NULL; l = &(*l)->next)
;
*l = p;
capalloc.nhash++;
qunlock(&capalloc.qlock);
}
void netloginit(struct Fs *f)
{
f->alog = kzmalloc(sizeof(struct Netlog), 0);
spinlock_init(&f->alog->lock);
qlock_init(&f->alog->qlock);
rendez_init(&f->alog->r);
}
long devtabread(struct chan *c, void *buf, long n, int64_t off)
{
ERRSTACK(1);
int i;
struct dev *dev;
char *alloc, *e, *p;
alloc = kzmalloc(READSTR, KMALLOC_WAIT);
if (alloc == NULL)
error(ENOMEM, NULL);
p = alloc;
e = p + READSTR;
for (i = 0; &devtab[i] < __devtabend; i++) {
dev = &devtab[i];
printd("p %p e %p e-p %d\n", p, e, e - p);
printd("do %d %s\n", i, dev->name);
p += snprintf(p, e - p, "#%s\n", dev->name);
}
if (waserror()) {
kfree(alloc);
nexterror();
}
n = readstr(off, buf, n, alloc);
kfree(alloc);
poperror();
return n;
}
char *ipifcaddpref6(struct Ipifc *ifc, char **argv, int argc)
{
uint8_t onlink = 1;
uint8_t autoflag = 1;
uint64_t validlt = UINT64_MAX;
uint64_t preflt = UINT64_MAX;
uint64_t origint = NOW / 10 ^ 3;
uint8_t prefix[IPaddrlen];
int plen = 64;
struct Iplifc *lifc;
char addr[40], preflen[6];
char *params[3];
switch (argc) {
case 7:
preflt = atoi(argv[6]);
/* fall through */
case 6:
validlt = atoi(argv[5]);
/* fall through */
case 5:
autoflag = atoi(argv[4]);
/* fall through */
case 4:
onlink = atoi(argv[3]);
/* fall through */
case 3:
plen = atoi(argv[2]);
case 2:
break;
default:
return Ebadarg;
}
if ((parseip(prefix, argv[1]) != 6) ||
(validlt < preflt) || (plen < 0) || (plen > 64) || (islinklocal(prefix))
)
return Ebadarg;
lifc = kzmalloc(sizeof(struct Iplifc), 0);
lifc->onlink = (onlink != 0);
lifc->autoflag = (autoflag != 0);
lifc->validlt = validlt;
lifc->preflt = preflt;
lifc->origint = origint;
if (ifc->m->pref2addr != NULL)
ifc->m->pref2addr(prefix, ifc->mac);
else
return Ebadarg;
snprintf(addr, sizeof(addr), "%I", prefix);
snprintf(preflen, sizeof(preflen), "/%d", plen);
params[0] = "add";
params[1] = addr;
params[2] = preflen;
return ipifcadd(ifc, params, 3, 0, lifc);
}
static struct perfmon_status *perfmon_alloc_status(void)
{
struct perfmon_status *pef = kzmalloc(sizeof(struct perfmon_status) +
num_cores * sizeof(uint64_t),
KMALLOC_WAIT);
return pef;
}
/*
* create a pipe, no streams are created until an open
*/
static struct chan *pipeattach(char *spec)
{
ERRSTACK(2);
Pipe *p;
struct chan *c;
c = devattach(devname(), spec);
p = kzmalloc(sizeof(Pipe), 0);
if (p == 0)
error(ENOMEM, ERROR_FIXME);
if (waserror()) {
freepipe(p);
nexterror();
}
p->pipedir = kzmalloc(sizeof(pipedir), 0);
if (p->pipedir == 0)
error(ENOMEM, ERROR_FIXME);
memmove(p->pipedir, pipedir, sizeof(pipedir));
kstrdup(&p->user, current->user);
kref_init(&p->ref, pipe_release, 1);
qlock_init(&p->qlock);
p->q[0] = qopen(pipealloc.pipeqsize, Qcoalesce, 0, 0);
if (p->q[0] == 0)
error(ENOMEM, ERROR_FIXME);
p->q[1] = qopen(pipealloc.pipeqsize, Qcoalesce, 0, 0);
if (p->q[1] == 0)
error(ENOMEM, ERROR_FIXME);
poperror();
spin_lock(&(&pipealloc)->lock);
p->path = ++pipealloc.path;
spin_unlock(&(&pipealloc)->lock);
c->qid.path = NETQID(2 * p->path, Qdir);
c->qid.vers = 0;
c->qid.type = QTDIR;
c->aux = p;
c->dev = 0;
/* taps. */
SLIST_INIT(&p->data_taps[0]); /* already = 0; set to be futureproof */
SLIST_INIT(&p->data_taps[1]);
spinlock_init(&p->tap_lock);
return c;
}
/*
* keep track of multicast addresses
*/
static char *netmulti(struct ether *nif, struct netfile *f, uint8_t * addr,
int add)
{
struct netaddr **l, *ap;
int i;
uint32_t h;
if (nif->multicast == NULL)
return "interface does not support multicast";
l = &nif->maddr;
i = 0;
for (ap = *l; ap; ap = *l) {
if (memcmp(addr, ap->addr, nif->alen) == 0)
break;
i++;
l = &ap->next;
}
if (add) {
if (ap == 0) {
/* TODO: AFAIK, this never gets freed. if we fix that, we can use a
* kref too (instead of int ap->ref). */
*l = ap = kzmalloc(sizeof(*ap), 0);
memmove(ap->addr, addr, nif->alen);
ap->next = 0;
ap->ref = 1;
h = hash(addr, nif->alen);
ap->hnext = nif->mhash[h];
nif->mhash[h] = ap;
} else {
ap->ref++;
}
if (ap->ref == 1) {
nif->nmaddr++;
nif->multicast(nif->arg, addr, 1);
}
if (i < 8 * sizeof(f->maddr)) {
if ((f->maddr[i / 8] & (1 << (i % 8))) == 0)
f->nmaddr++;
f->maddr[i / 8] |= 1 << (i % 8);
}
} else {
if (ap == 0 || ap->ref == 0)
return 0;
ap->ref--;
if (ap->ref == 0) {
nif->nmaddr--;
nif->multicast(nif->arg, addr, 0);
}
if (i < 8 * sizeof(f->maddr)) {
if ((f->maddr[i / 8] & (1 << (i % 8))) != 0)
f->nmaddr--;
f->maddr[i / 8] &= ~(1 << (i % 8));
}
}
return 0;
}
/*
* Atomically replace *p with copy of s
*/
void kstrdup(char **p, char *s)
{
int n;
char *t, *prev;
n = strlen(s) + 1;
/* if it's a user, we can wait for memory; if not, something's very wrong */
if (current) {
t = kzmalloc(n, 0);
} else {
t = kzmalloc(n, 0);
if (t == NULL)
panic("kstrdup: no memory");
}
memmove(t, s, n);
prev = *p;
*p = t;
kfree(prev);
}
struct perfmon_session *perfmon_create_session(void)
{
struct perfmon_session *ps = kzmalloc(sizeof(struct perfmon_session),
KMALLOC_WAIT);
kref_init(&ps->ref, perfmon_release_session, 1);
spinlock_init(&ps->lock);
return ps;
}
void arpinit(struct Fs *f)
{
f->arp = kzmalloc(sizeof(struct arp), MEM_WAIT);
qlock_init(&f->arp->qlock);
rendez_init(&f->arp->rxmtq);
f->arp->f = f;
f->arp->rxmt = NULL;
f->arp->dropf = f->arp->dropl = NULL;
ktask("rxmitproc", rxmitproc, f->arp);
}
/*
* Increment the reference count of a network device.
* If id < 0, return an unused ether device.
*/
static int openfile(struct ether *nif, int id)
{
ERRSTACK(1);
struct netfile *f, **fp, **efp;
if (id >= 0) {
f = nif->f[id];
if (f == 0)
error(Enodev);
qlock(&f->qlock);
qreopen(f->in);
f->inuse++;
qunlock(&f->qlock);
return id;
}
qlock(&nif->qlock);
if (waserror()) {
qunlock(&nif->qlock);
nexterror();
}
efp = &nif->f[nif->nfile];
for (fp = nif->f; fp < efp; fp++) {
f = *fp;
if (f == 0) {
f = kzmalloc(sizeof(struct netfile), 0);
if (f == 0)
exhausted("memory");
/* since we lock before netifinit (if we ever call that...) */
qlock_init(&f->qlock);
f->in = qopen(nif->limit, Qmsg, 0, 0);
if (f->in == NULL) {
kfree(f);
exhausted("memory");
}
*fp = f;
qlock(&f->qlock);
} else {
qlock(&f->qlock);
if (f->inuse) {
qunlock(&f->qlock);
continue;
}
}
f->inuse = 1;
qreopen(f->in);
netown(f, current->user, 0);
qunlock(&f->qlock);
qunlock(&nif->qlock);
poperror();
return fp - nif->f;
}
error(Enodev);
return -1; /* not reached */
}
/*
* set up a new network interface
*/
void netifinit(struct ether *nif, char *name, int nfile, uint32_t limit)
{
qlock_init(&nif->qlock);
strlcpy(nif->name, name, KNAMELEN);
nif->nfile = nfile;
nif->f = kzmalloc(nfile * sizeof(struct netfile *), 0);
if (nif->f)
memset(nif->f, 0, nfile * sizeof(struct netfile *));
else
nif->nfile = 0;
nif->limit = limit;
}
void udpinit(struct Fs *fs)
{
struct Proto *udp;
udp = kzmalloc(sizeof(struct Proto), 0);
udp->priv = kzmalloc(sizeof(Udppriv), 0);
udp->name = "udp";
udp->connect = udpconnect;
udp->announce = udpannounce;
udp->ctl = udpctl;
udp->state = udpstate;
udp->create = udpcreate;
udp->close = udpclose;
udp->rcv = udpiput;
udp->advise = udpadvise;
udp->stats = udpstats;
udp->ipproto = IP_UDPPROTO;
udp->nc = Nchans;
udp->newconv = udpnewconv;
udp->ptclsize = sizeof(Udpcb);
Fsproto(fs, udp);
}
static struct perfmon_alloc *perfmon_create_alloc(const struct perfmon_event *pev)
{
int i;
struct perfmon_alloc *pa = kzmalloc(sizeof(struct perfmon_alloc) +
num_cores * sizeof(counter_t),
KMALLOC_WAIT);
kref_init(&pa->ref, perfmon_release_alloc, 1);
pa->ev = *pev;
for (i = 0; i < num_cores; i++)
pa->cores_counters[i] = INVALID_COUNTER;
return pa;
}
static void
loopbackbind(struct Ipifc *ifc, int unused_int, char **unused_char_pp_t)
{
LB *lb;
lb = kzmalloc(sizeof(*lb), 0);
lb->f = ifc->conv->p->f;
/* TO DO: make queue size a function of kernel memory */
lb->q = qopen(128 * 1024, Qmsg, NULL, NULL);
ifc->arg = lb;
ifc->mbps = 1000;
ktask("loopbackread", loopbackread, ifc);
}
/* Initializes a process to run virtual machine contexts, returning the number
* initialized, optionally setting errno */
int vmm_struct_init(struct proc *p, unsigned int nr_guest_pcores,
struct vmm_gpcore_init *u_gpcis, int flags)
{
struct vmm *vmm = &p->vmm;
unsigned int i;
struct vmm_gpcore_init gpci;
if (flags & ~VMM_ALL_FLAGS) {
set_errstr("%s: flags is 0x%lx, VMM_ALL_FLAGS is 0x%lx\n", __func__,
flags, VMM_ALL_FLAGS);
set_errno(EINVAL);
return 0;
}
vmm->flags = flags;
if (!x86_supports_vmx) {
set_errno(ENODEV);
return 0;
}
qlock(&vmm->qlock);
if (vmm->vmmcp) {
set_errno(EINVAL);
qunlock(&vmm->qlock);
return 0;
}
/* Set this early, so cleanup checks the gpc array */
vmm->vmmcp = TRUE;
nr_guest_pcores = MIN(nr_guest_pcores, num_cores);
vmm->amd = 0;
vmm->guest_pcores = kzmalloc(sizeof(void*) * nr_guest_pcores, KMALLOC_WAIT);
for (i = 0; i < nr_guest_pcores; i++) {
if (copy_from_user(&gpci, &u_gpcis[i],
sizeof(struct vmm_gpcore_init))) {
set_error(EINVAL, "Bad pointer %p for gps", u_gpcis);
break;
}
vmm->guest_pcores[i] = create_guest_pcore(p, &gpci);
/* If we failed, we'll clean it up when the process dies */
if (!vmm->guest_pcores[i]) {
set_errno(ENOMEM);
break;
}
}
vmm->nr_guest_pcores = i;
for (int i = 0; i < VMM_VMEXIT_NR_TYPES; i++)
vmm->vmexits[i] = 0;
qunlock(&vmm->qlock);
return i;
}
/* open a queue to be bypassed */
struct queue *qbypass(void (*bypass) (void *, struct block *), void *arg)
{
struct queue *q;
q = kzmalloc(sizeof(struct queue), 0);
if (q == 0)
return 0;
qinit_common(q);
q->limit = 0;
q->arg = arg;
q->bypass = bypass;
q->state = 0;
return q;
}
struct chan *devattach(int tc, char *spec)
{
struct chan *c;
char *buf;
c = newchan();
mkqid(&c->qid, 0, 0, QTDIR);
c->type = devno(tc, 0);
if (spec == NULL)
spec = "";
/* 2 for #c, 1 for \0 */
buf = kzmalloc(2 + strlen(spec) + 1, KMALLOC_WAIT);
snprintf(buf, sizeof(buf), "#%c%s", tc, spec);
c->name = newcname(buf);
kfree(buf);
return c;
}
/*
* called by non-interrupt code
*/
struct queue *qopen(int limit, int msg, void (*kick) (void *), void *arg)
{
struct queue *q;
q = kzmalloc(sizeof(struct queue), 0);
if (q == 0)
return 0;
qinit_common(q);
q->limit = q->inilim = limit;
q->kick = kick;
q->arg = arg;
q->state = msg;
q->state |= Qstarve;
q->eof = 0;
return q;
}