/*
* m_getjcl() returns an mbuf with a cluster of the specified size attached.
* For size it takes MCLBYTES, MJUMPAGESIZE, MJUM9BYTES, MJUM16BYTES.
*/
struct mbuf *
m_getjcl(int how, short type, int flags, int size)
{
struct mb_args args;
struct mbuf *m, *n;
uma_zone_t zone;
if (size == MCLBYTES)
return m_getcl(how, type, flags);
args.flags = flags;
args.type = type;
m = uma_zalloc_arg(zone_mbuf, &args, how);
if (m == NULL)
return (NULL);
zone = m_getzone(size);
n = uma_zalloc_arg(zone, m, how);
if (n == NULL) {
uma_zfree(zone_mbuf, m);
return (NULL);
}
return (m);
}
/*
* m_get2() allocates minimum mbuf that would fit "size" argument.
*/
struct mbuf *
m_get2(int size, int how, short type, int flags)
{
struct mb_args args;
struct mbuf *m, *n;
args.flags = flags;
args.type = type;
if (size <= MHLEN || (size <= MLEN && (flags & M_PKTHDR) == 0))
return (uma_zalloc_arg(zone_mbuf, &args, how));
if (size <= MCLBYTES)
return (uma_zalloc_arg(zone_pack, &args, how));
if (size > MJUMPAGESIZE)
return (NULL);
m = uma_zalloc_arg(zone_mbuf, &args, how);
if (m == NULL)
return (NULL);
n = uma_zalloc_arg(zone_jumbop, m, how);
if (n == NULL) {
uma_zfree(zone_mbuf, m);
return (NULL);
}
return (m);
}
/*
* XXXAUDIT: There are a number of races present in the code below due to
* release and re-grab of the mutex. The code should be revised to become
* slightly less racy.
*
* XXXAUDIT: Shouldn't there be logic here to sleep waiting on available
* pre_q space, suspending the system call until there is room?
*/
struct kaudit_record *
audit_new(int event, struct thread *td)
{
struct kaudit_record *ar;
int no_record;
mtx_lock(&audit_mtx);
no_record = (audit_suspended || !audit_enabled);
mtx_unlock(&audit_mtx);
if (no_record)
return (NULL);
/*
* Note: the number of outstanding uncommitted audit records is
* limited to the number of concurrent threads servicing system calls
* in the kernel.
*/
ar = uma_zalloc_arg(audit_record_zone, td, M_WAITOK);
ar->k_ar.ar_event = event;
mtx_lock(&audit_mtx);
audit_pre_q_len++;
mtx_unlock(&audit_mtx);
return (ar);
}
static struct mbuf *sfxge_rx_alloc_mbuf(struct sfxge_softc *sc)
{
struct mb_args args;
struct mbuf *m;
/* Allocate mbuf structure */
args.flags = M_PKTHDR;
args.type = MT_DATA;
m = (struct mbuf *)uma_zalloc_arg(zone_mbuf, &args, M_NOWAIT);
/* Allocate (and attach) packet buffer */
if (m != NULL && !uma_zalloc_arg(sc->rx_buffer_zone, m, M_NOWAIT)) {
uma_zfree(zone_mbuf, m);
m = NULL;
}
return (m);
}
int
m_clget(struct mbuf *m, int how)
{
KASSERT((m->m_flags & M_EXT) == 0, ("%s: mbuf %p has M_EXT",
__func__, m));
m->m_ext.ext_buf = (char *)NULL;
uma_zalloc_arg(zone_clust, m, how);
/*
* On a cluster allocation failure, drain the packet zone and retry,
* we might be able to loosen a few clusters up on the drain.
*/
if ((how & M_NOWAIT) && (m->m_ext.ext_buf == NULL)) {
zone_drain(zone_pack);
uma_zalloc_arg(zone_clust, m, how);
}
return (m->m_flags & M_EXT);
}
/*
* The Packet secondary zone's init routine, executed on the
* object's transition from keg slab to zone cache.
*/
static int
mb_init_pack(void *mem, int size, int how)
{
struct mbuf *m;
m = (struct mbuf *)mem;
m->m_ext.ext_buf = NULL;
uma_zalloc_arg(zone_clust, m, how);
if (m->m_ext.ext_buf == NULL)
return (ENOMEM);
mbstat.m_mclusts -= 1; /* XXX */
return (0);
}
/*
* m_cljget() is different from m_clget() as it can allocate clusters without
* attaching them to an mbuf. In that case the return value is the pointer
* to the cluster of the requested size. If an mbuf was specified, it gets
* the cluster attached to it and the return value can be safely ignored.
* For size it takes MCLBYTES, MJUMPAGESIZE, MJUM9BYTES, MJUM16BYTES.
*/
void *
m_cljget(struct mbuf *m, int how, int size)
{
uma_zone_t zone;
if (m != NULL) {
KASSERT((m->m_flags & M_EXT) == 0, ("%s: mbuf %p has M_EXT",
__func__, m));
m->m_ext.ext_buf = NULL;
}
zone = m_getzone(size);
return (uma_zalloc_arg(zone, m, how));
}
/*
* The Packet secondary zone's init routine, executed on the
* object's transition from mbuf keg slab to zone cache.
*/
static int
mb_zinit_pack(void *mem, int size, int how)
{
struct mbuf *m;
m = (struct mbuf *)mem; /* m is virgin. */
if (uma_zalloc_arg(zone_clust, m, how) == NULL ||
m->m_ext.ext_buf == NULL)
return (ENOMEM);
m->m_ext.ext_type = EXT_PACKET; /* Override. */
#ifdef INVARIANTS
trash_init(m->m_ext.ext_buf, MCLBYTES, how);
#endif
return (0);
}
/*
* m_cljget() is different from m_clget() as it can allocate clusters without
* attaching them to an mbuf. In that case the return value is the pointer
* to the cluster of the requested size. If an mbuf was specified, it gets
* the cluster attached to it and the return value can be safely ignored.
* For size it takes MCLBYTES, MJUMPAGESIZE, MJUM9BYTES, MJUM16BYTES.
*/
void *
m_cljget(struct mbuf *m, int how, int size)
{
uma_zone_t zone;
void *retval;
if (m != NULL) {
KASSERT((m->m_flags & M_EXT) == 0, ("%s: mbuf %p has M_EXT",
__func__, m));
m->m_ext.ext_buf = NULL;
}
zone = m_getzone(size);
retval = uma_zalloc_arg(zone, m, how);
MBUF_PROBE4(m__cljget, m, how, size, retval);
return (retval);
}
static __inline struct fuse_ticket *
fticket_alloc(struct fuse_data *data)
{
return uma_zalloc_arg(ticket_zone, data, M_WAITOK);
}
