#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/hrtimer.h>
+#include <linux/lockdep.h>
#include <net/net_namespace.h>
#include <net/sock.h>
Auxiliary routines:
- ---requeue
+ ---peek
- requeues once dequeued packet. It is used for non-standard or
- just buggy devices, which can defer output even if netif_queue_stopped()=0.
+ like dequeue but without removing a packet from the queue
---reset
if (qops->enqueue == NULL)
qops->enqueue = noop_qdisc_ops.enqueue;
- if (qops->requeue == NULL)
- qops->requeue = noop_qdisc_ops.requeue;
+ if (qops->peek == NULL) {
+ if (qops->dequeue == NULL) {
+ qops->peek = noop_qdisc_ops.peek;
+ } else {
+ rc = -EINVAL;
+ goto out;
+ }
+ }
if (qops->dequeue == NULL)
qops->dequeue = noop_qdisc_ops.dequeue;
(root qdisc, all its children, children of children etc.)
*/
-struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
+static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
{
struct Qdisc *q;
- list_for_each_entry(q, &dev->qdisc_list, list) {
+ if (!(root->flags & TCQ_F_BUILTIN) &&
+ root->handle == handle)
+ return root;
+
+ list_for_each_entry(q, &root->list, list) {
if (q->handle == handle)
return q;
}
return NULL;
}
+static void qdisc_list_add(struct Qdisc *q)
+{
+ if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS))
+ list_add_tail(&q->list, &qdisc_root_sleeping(q)->list);
+}
+
+void qdisc_list_del(struct Qdisc *q)
+{
+ if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS))
+ list_del(&q->list);
+}
+EXPORT_SYMBOL(qdisc_list_del);
+
+struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
+{
+ unsigned int i;
+ struct Qdisc *q;
+
+ for (i = 0; i < dev->num_tx_queues; i++) {
+ struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
+ struct Qdisc *txq_root = txq->qdisc_sleeping;
+
+ q = qdisc_match_from_root(txq_root, handle);
+ if (q)
+ goto out;
+ }
+
+ q = qdisc_match_from_root(dev->rx_queue.qdisc_sleeping, handle);
+out:
+ return q;
+}
+
static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
{
unsigned long cl;
}
EXPORT_SYMBOL(qdisc_put_rtab);
+static LIST_HEAD(qdisc_stab_list);
+static DEFINE_SPINLOCK(qdisc_stab_lock);
+
+static const struct nla_policy stab_policy[TCA_STAB_MAX + 1] = {
+ [TCA_STAB_BASE] = { .len = sizeof(struct tc_sizespec) },
+ [TCA_STAB_DATA] = { .type = NLA_BINARY },
+};
+
+static struct qdisc_size_table *qdisc_get_stab(struct nlattr *opt)
+{
+ struct nlattr *tb[TCA_STAB_MAX + 1];
+ struct qdisc_size_table *stab;
+ struct tc_sizespec *s;
+ unsigned int tsize = 0;
+ u16 *tab = NULL;
+ int err;
+
+ err = nla_parse_nested(tb, TCA_STAB_MAX, opt, stab_policy);
+ if (err < 0)
+ return ERR_PTR(err);
+ if (!tb[TCA_STAB_BASE])
+ return ERR_PTR(-EINVAL);
+
+ s = nla_data(tb[TCA_STAB_BASE]);
+
+ if (s->tsize > 0) {
+ if (!tb[TCA_STAB_DATA])
+ return ERR_PTR(-EINVAL);
+ tab = nla_data(tb[TCA_STAB_DATA]);
+ tsize = nla_len(tb[TCA_STAB_DATA]) / sizeof(u16);
+ }
+
+ if (!s || tsize != s->tsize || (!tab && tsize > 0))
+ return ERR_PTR(-EINVAL);
+
+ spin_lock(&qdisc_stab_lock);
+
+ list_for_each_entry(stab, &qdisc_stab_list, list) {
+ if (memcmp(&stab->szopts, s, sizeof(*s)))
+ continue;
+ if (tsize > 0 && memcmp(stab->data, tab, tsize * sizeof(u16)))
+ continue;
+ stab->refcnt++;
+ spin_unlock(&qdisc_stab_lock);
+ return stab;
+ }
+
+ spin_unlock(&qdisc_stab_lock);
+
+ stab = kmalloc(sizeof(*stab) + tsize * sizeof(u16), GFP_KERNEL);
+ if (!stab)
+ return ERR_PTR(-ENOMEM);
+
+ stab->refcnt = 1;
+ stab->szopts = *s;
+ if (tsize > 0)
+ memcpy(stab->data, tab, tsize * sizeof(u16));
+
+ spin_lock(&qdisc_stab_lock);
+ list_add_tail(&stab->list, &qdisc_stab_list);
+ spin_unlock(&qdisc_stab_lock);
+
+ return stab;
+}
+
+void qdisc_put_stab(struct qdisc_size_table *tab)
+{
+ if (!tab)
+ return;
+
+ spin_lock(&qdisc_stab_lock);
+
+ if (--tab->refcnt == 0) {
+ list_del(&tab->list);
+ kfree(tab);
+ }
+
+ spin_unlock(&qdisc_stab_lock);
+}
+EXPORT_SYMBOL(qdisc_put_stab);
+
+static int qdisc_dump_stab(struct sk_buff *skb, struct qdisc_size_table *stab)
+{
+ struct nlattr *nest;
+
+ nest = nla_nest_start(skb, TCA_STAB);
+ if (nest == NULL)
+ goto nla_put_failure;
+ NLA_PUT(skb, TCA_STAB_BASE, sizeof(stab->szopts), &stab->szopts);
+ nla_nest_end(skb, nest);
+
+ return skb->len;
+
+nla_put_failure:
+ return -1;
+}
+
+void qdisc_calculate_pkt_len(struct sk_buff *skb, struct qdisc_size_table *stab)
+{
+ int pkt_len, slot;
+
+ pkt_len = skb->len + stab->szopts.overhead;
+ if (unlikely(!stab->szopts.tsize))
+ goto out;
+
+ slot = pkt_len + stab->szopts.cell_align;
+ if (unlikely(slot < 0))
+ slot = 0;
+
+ slot >>= stab->szopts.cell_log;
+ if (likely(slot < stab->szopts.tsize))
+ pkt_len = stab->data[slot];
+ else
+ pkt_len = stab->data[stab->szopts.tsize - 1] *
+ (slot / stab->szopts.tsize) +
+ stab->data[slot % stab->szopts.tsize];
+
+ pkt_len <<= stab->szopts.size_log;
+out:
+ if (unlikely(pkt_len < 1))
+ pkt_len = 1;
+ qdisc_skb_cb(skb)->pkt_len = pkt_len;
+}
+EXPORT_SYMBOL(qdisc_calculate_pkt_len);
+
+void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc)
+{
+ if (!(qdisc->flags & TCQ_F_WARN_NONWC)) {
+ printk(KERN_WARNING
+ "%s: %s qdisc %X: is non-work-conserving?\n",
+ txt, qdisc->ops->id, qdisc->handle >> 16);
+ qdisc->flags |= TCQ_F_WARN_NONWC;
+ }
+}
+EXPORT_SYMBOL(qdisc_warn_nonwc);
+
static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer)
{
struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog,
timer);
wd->qdisc->flags &= ~TCQ_F_THROTTLED;
- smp_wmb();
- __netif_schedule(wd->qdisc);
+ __netif_schedule(qdisc_root(wd->qdisc));
return HRTIMER_NORESTART;
}
{
ktime_t time;
+ if (test_bit(__QDISC_STATE_DEACTIVATED,
+ &qdisc_root_sleeping(wd->qdisc)->state))
+ return;
+
wd->qdisc->flags |= TCQ_F_THROTTLED;
time = ktime_set(0, 0);
- time = ktime_add_ns(time, PSCHED_US2NS(expires));
+ time = ktime_add_ns(time, PSCHED_TICKS2NS(expires));
hrtimer_start(&wd->timer, time, HRTIMER_MODE_ABS);
}
EXPORT_SYMBOL(qdisc_watchdog_schedule);
}
EXPORT_SYMBOL(qdisc_watchdog_cancel);
-struct hlist_head *qdisc_class_hash_alloc(unsigned int n)
+static struct hlist_head *qdisc_class_hash_alloc(unsigned int n)
{
unsigned int size = n * sizeof(struct hlist_head), i;
struct hlist_head *h;
static struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
struct Qdisc *qdisc)
{
+ struct Qdisc *oqdisc = dev_queue->qdisc_sleeping;
spinlock_t *root_lock;
- struct Qdisc *oqdisc;
- int ingress;
-
- ingress = 0;
- if (qdisc && qdisc->flags&TCQ_F_INGRESS)
- ingress = 1;
- if (ingress) {
- oqdisc = dev_queue->qdisc;
- } else {
- oqdisc = dev_queue->qdisc_sleeping;
- }
-
- root_lock = qdisc_root_lock(oqdisc);
+ root_lock = qdisc_lock(oqdisc);
spin_lock_bh(root_lock);
- if (ingress) {
- /* Prune old scheduler */
- if (oqdisc && atomic_read(&oqdisc->refcnt) <= 1) {
- /* delete */
- qdisc_reset(oqdisc);
- dev_queue->qdisc = NULL;
- } else { /* new */
- dev_queue->qdisc = qdisc;
- }
+ /* Prune old scheduler */
+ if (oqdisc && atomic_read(&oqdisc->refcnt) <= 1)
+ qdisc_reset(oqdisc);
- } else {
- /* Prune old scheduler */
- if (oqdisc && atomic_read(&oqdisc->refcnt) <= 1)
- qdisc_reset(oqdisc);
-
- /* ... and graft new one */
- if (qdisc == NULL)
- qdisc = &noop_qdisc;
- dev_queue->qdisc_sleeping = qdisc;
- dev_queue->qdisc = &noop_qdisc;
- }
+ /* ... and graft new one */
+ if (qdisc == NULL)
+ qdisc = &noop_qdisc;
+ dev_queue->qdisc_sleeping = qdisc;
+ rcu_assign_pointer(dev_queue->qdisc, &noop_qdisc);
spin_unlock_bh(root_lock);
if (new || old)
qdisc_notify(skb, n, clid, old, new);
- if (old) {
- spin_lock_bh(&old->q.lock);
+ if (old)
qdisc_destroy(old);
- spin_unlock_bh(&old->q.lock);
- }
}
/* Graft qdisc "new" to class "classid" of qdisc "parent" or
ingress = 0;
num_q = dev->num_tx_queues;
- if (q && q->flags & TCQ_F_INGRESS) {
+ if ((q && q->flags & TCQ_F_INGRESS) ||
+ (new && new->flags & TCQ_F_INGRESS)) {
num_q = 1;
ingress = 1;
}
if (!ingress)
dev_queue = netdev_get_tx_queue(dev, i);
- if (ingress) {
- old = dev_graft_qdisc(dev_queue, q);
- } else {
- old = dev_graft_qdisc(dev_queue, new);
- if (new && i > 0)
- atomic_inc(&new->refcnt);
- }
+ old = dev_graft_qdisc(dev_queue, new);
+ if (new && i > 0)
+ atomic_inc(&new->refcnt);
+
notify_and_destroy(skb, n, classid, old, new);
}
return err;
}
+/* lockdep annotation is needed for ingress; egress gets it only for name */
+static struct lock_class_key qdisc_tx_lock;
+static struct lock_class_key qdisc_rx_lock;
+
/*
Allocate and initialize new qdisc.
struct nlattr *kind = tca[TCA_KIND];
struct Qdisc *sch;
struct Qdisc_ops *ops;
+ struct qdisc_size_table *stab;
ops = qdisc_lookup_ops(kind);
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
if (ops == NULL && kind != NULL) {
char name[IFNAMSIZ];
if (nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) {
if (handle == TC_H_INGRESS) {
sch->flags |= TCQ_F_INGRESS;
handle = TC_H_MAKE(TC_H_INGRESS, 0);
+ lockdep_set_class(qdisc_lock(sch), &qdisc_rx_lock);
} else {
if (handle == 0) {
handle = qdisc_alloc_handle(dev);
if (handle == 0)
goto err_out3;
}
+ lockdep_set_class(qdisc_lock(sch), &qdisc_tx_lock);
}
sch->handle = handle;
if (!ops->init || (err = ops->init(sch, tca[TCA_OPTIONS])) == 0) {
+ if (tca[TCA_STAB]) {
+ stab = qdisc_get_stab(tca[TCA_STAB]);
+ if (IS_ERR(stab)) {
+ err = PTR_ERR(stab);
+ goto err_out3;
+ }
+ sch->stab = stab;
+ }
if (tca[TCA_RATE]) {
+ spinlock_t *root_lock;
+
+ if ((sch->parent != TC_H_ROOT) &&
+ !(sch->flags & TCQ_F_INGRESS))
+ root_lock = qdisc_root_sleeping_lock(sch);
+ else
+ root_lock = qdisc_lock(sch);
+
err = gen_new_estimator(&sch->bstats, &sch->rate_est,
- qdisc_root_lock(sch),
- tca[TCA_RATE]);
+ root_lock, tca[TCA_RATE]);
if (err) {
/*
* Any broken qdiscs that would require
goto err_out3;
}
}
- spin_lock_bh(&dev->qdisc_list_lock);
- list_add_tail(&sch->list, &dev->qdisc_list);
- spin_unlock_bh(&dev->qdisc_list_lock);
+
+ qdisc_list_add(sch);
return sch;
}
err_out3:
+ qdisc_put_stab(sch->stab);
dev_put(dev);
kfree((char *) sch - sch->padded);
err_out2:
static int qdisc_change(struct Qdisc *sch, struct nlattr **tca)
{
- if (tca[TCA_OPTIONS]) {
- int err;
+ struct qdisc_size_table *stab = NULL;
+ int err = 0;
+ if (tca[TCA_OPTIONS]) {
if (sch->ops->change == NULL)
return -EINVAL;
err = sch->ops->change(sch, tca[TCA_OPTIONS]);
if (err)
return err;
}
+
+ if (tca[TCA_STAB]) {
+ stab = qdisc_get_stab(tca[TCA_STAB]);
+ if (IS_ERR(stab))
+ return PTR_ERR(stab);
+ }
+
+ qdisc_put_stab(sch->stab);
+ sch->stab = stab;
+
if (tca[TCA_RATE])
+ /* NB: ignores errors from replace_estimator
+ because change can't be undone. */
gen_replace_estimator(&sch->bstats, &sch->rate_est,
- qdisc_root_lock(sch), tca[TCA_RATE]);
+ qdisc_root_sleeping_lock(sch),
+ tca[TCA_RATE]);
+
return 0;
}
return -ENOENT;
q = qdisc_leaf(p, clid);
} else { /* ingress */
- q = dev->rx_queue.qdisc;
+ q = dev->rx_queue.qdisc_sleeping;
}
} else {
struct netdev_queue *dev_queue;
return -ENOENT;
q = qdisc_leaf(p, clid);
} else { /*ingress */
- q = dev->rx_queue.qdisc;
+ q = dev->rx_queue.qdisc_sleeping;
}
} else {
struct netdev_queue *dev_queue;
}
graft:
- if (1) {
- spinlock_t *root_lock;
-
- err = qdisc_graft(dev, p, skb, n, clid, q, NULL);
- if (err) {
- if (q) {
- root_lock = qdisc_root_lock(q);
- spin_lock_bh(root_lock);
- qdisc_destroy(q);
- spin_unlock_bh(root_lock);
- }
- return err;
- }
+ err = qdisc_graft(dev, p, skb, n, clid, q, NULL);
+ if (err) {
+ if (q)
+ qdisc_destroy(q);
+ return err;
}
+
return 0;
}
goto nla_put_failure;
q->qstats.qlen = q->q.qlen;
- if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,
- TCA_XSTATS, qdisc_root_lock(q), &d) < 0)
+ if (q->stab && qdisc_dump_stab(skb, q->stab) < 0)
+ goto nla_put_failure;
+
+ if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
+ qdisc_root_sleeping_lock(q), &d) < 0)
goto nla_put_failure;
if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0)
return -EINVAL;
}
+static bool tc_qdisc_dump_ignore(struct Qdisc *q)
+{
+ return (q->flags & TCQ_F_BUILTIN) ? true : false;
+}
+
+static int tc_dump_qdisc_root(struct Qdisc *root, struct sk_buff *skb,
+ struct netlink_callback *cb,
+ int *q_idx_p, int s_q_idx)
+{
+ int ret = 0, q_idx = *q_idx_p;
+ struct Qdisc *q;
+
+ if (!root)
+ return 0;
+
+ q = root;
+ if (q_idx < s_q_idx) {
+ q_idx++;
+ } else {
+ if (!tc_qdisc_dump_ignore(q) &&
+ tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
+ goto done;
+ q_idx++;
+ }
+ list_for_each_entry(q, &root->list, list) {
+ if (q_idx < s_q_idx) {
+ q_idx++;
+ continue;
+ }
+ if (!tc_qdisc_dump_ignore(q) &&
+ tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
+ goto done;
+ q_idx++;
+ }
+
+out:
+ *q_idx_p = q_idx;
+ return ret;
+done:
+ ret = -1;
+ goto out;
+}
+
static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
int idx, q_idx;
int s_idx, s_q_idx;
struct net_device *dev;
- struct Qdisc *q;
if (net != &init_net)
return 0;
read_lock(&dev_base_lock);
idx = 0;
for_each_netdev(&init_net, dev) {
+ struct netdev_queue *dev_queue;
+
if (idx < s_idx)
goto cont;
if (idx > s_idx)
s_q_idx = 0;
q_idx = 0;
- list_for_each_entry(q, &dev->qdisc_list, list) {
- if (q_idx < s_q_idx) {
- q_idx++;
- continue;
- }
- if (tc_fill_qdisc(skb, q, q->parent, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWQDISC) <= 0)
- goto done;
- q_idx++;
- }
+
+ dev_queue = netdev_get_tx_queue(dev, 0);
+ if (tc_dump_qdisc_root(dev_queue->qdisc_sleeping, skb, cb, &q_idx, s_q_idx) < 0)
+ goto done;
+
+ dev_queue = &dev->rx_queue;
+ if (tc_dump_qdisc_root(dev_queue->qdisc_sleeping, skb, cb, &q_idx, s_q_idx) < 0)
+ goto done;
+
cont:
idx++;
}
if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0)
goto nla_put_failure;
- if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,
- TCA_XSTATS, qdisc_root_lock(q), &d) < 0)
+ if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
+ qdisc_root_sleeping_lock(q), &d) < 0)
goto nla_put_failure;
if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0)
a->cb->nlh->nlmsg_seq, NLM_F_MULTI, RTM_NEWTCLASS);
}
+static int tc_dump_tclass_qdisc(struct Qdisc *q, struct sk_buff *skb,
+ struct tcmsg *tcm, struct netlink_callback *cb,
+ int *t_p, int s_t)
+{
+ struct qdisc_dump_args arg;
+
+ if (tc_qdisc_dump_ignore(q) ||
+ *t_p < s_t || !q->ops->cl_ops ||
+ (tcm->tcm_parent &&
+ TC_H_MAJ(tcm->tcm_parent) != q->handle)) {
+ (*t_p)++;
+ return 0;
+ }
+ if (*t_p > s_t)
+ memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0]));
+ arg.w.fn = qdisc_class_dump;
+ arg.skb = skb;
+ arg.cb = cb;
+ arg.w.stop = 0;
+ arg.w.skip = cb->args[1];
+ arg.w.count = 0;
+ q->ops->cl_ops->walk(q, &arg.w);
+ cb->args[1] = arg.w.count;
+ if (arg.w.stop)
+ return -1;
+ (*t_p)++;
+ return 0;
+}
+
+static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
+ struct tcmsg *tcm, struct netlink_callback *cb,
+ int *t_p, int s_t)
+{
+ struct Qdisc *q;
+
+ if (!root)
+ return 0;
+
+ if (tc_dump_tclass_qdisc(root, skb, tcm, cb, t_p, s_t) < 0)
+ return -1;
+
+ list_for_each_entry(q, &root->list, list) {
+ if (tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh);
struct net *net = sock_net(skb->sk);
- int t;
- int s_t;
+ struct netdev_queue *dev_queue;
struct net_device *dev;
- struct Qdisc *q;
- struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh);
- struct qdisc_dump_args arg;
+ int t, s_t;
if (net != &init_net)
return 0;
s_t = cb->args[0];
t = 0;
- list_for_each_entry(q, &dev->qdisc_list, list) {
- if (t < s_t || !q->ops->cl_ops ||
- (tcm->tcm_parent &&
- TC_H_MAJ(tcm->tcm_parent) != q->handle)) {
- t++;
- continue;
- }
- if (t > s_t)
- memset(&cb->args[1], 0, sizeof(cb->args)-sizeof(cb->args[0]));
- arg.w.fn = qdisc_class_dump;
- arg.skb = skb;
- arg.cb = cb;
- arg.w.stop = 0;
- arg.w.skip = cb->args[1];
- arg.w.count = 0;
- q->ops->cl_ops->walk(q, &arg.w);
- cb->args[1] = arg.w.count;
- if (arg.w.stop)
- break;
- t++;
- }
+ dev_queue = netdev_get_tx_queue(dev, 0);
+ if (tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb, &t, s_t) < 0)
+ goto done;
+ dev_queue = &dev->rx_queue;
+ if (tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb, &t, s_t) < 0)
+ goto done;
+
+done:
cb->args[0] = t;
dev_put(dev);
hrtimer_get_res(CLOCK_MONOTONIC, &ts);
seq_printf(seq, "%08x %08x %08x %08x\n",
- (u32)NSEC_PER_USEC, (u32)PSCHED_US2NS(1),
+ (u32)NSEC_PER_USEC, (u32)PSCHED_TICKS2NS(1),
1000000,
(u32)NSEC_PER_SEC/(u32)ktime_to_ns(timespec_to_ktime(ts)));
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff