int sce_put4pop(sce_hndl_t scehndl, sce_poptask_t *poptask, int failed)
{
unsigned long flags;
sce_t *sce;
lun_t *lun;
int lunidx;
int ret;
if ((!scehndl) || (!poptask))
return SCE_ERROR;
sce = (sce_t *)scehndl;
lunidx = _lun_search(sce, poptask->lunctx);
if (lunidx < 0)
return SCE_ERROR;
lun = &sce->luntbl[lunidx];
spin_lock_irqsave(&lun->lock, flags);
if (!failed) {
ret = _complete_population(lun, poptask->lun_fragnum);
atomic64_inc(&lun->stats.populations);
atomic64_inc(&lun->stats.alloc_sctrs);
atomic64_add(SCE_SCTRPERFRAG, &lun->stats.valid_sctrs);
} else {
ret = _cancel_population(lun, poptask->lun_fragnum);
}
spin_unlock_irqrestore(&lun->lock, flags);
return ret;
}
static netdev_tx_t ccat_eth_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ccat_eth_priv *const priv = netdev_priv(dev);
struct ccat_eth_dma_fifo *const fifo = &priv->tx_fifo;
u32 addr_and_length;
if (skb_is_nonlinear(skb)) {
pr_warn("Non linear skb not supported -> drop frame.\n");
atomic64_inc(&priv->tx_dropped);
priv->kfree_skb_any(skb);
return NETDEV_TX_OK;
}
if (skb->len > sizeof(fifo->next->data)) {
pr_warn("skb.len %llu exceeds dma buffer %llu -> drop frame.\n",
(u64) skb->len, (u64) sizeof(fifo->next->data));
atomic64_inc(&priv->tx_dropped);
priv->kfree_skb_any(skb);
return NETDEV_TX_OK;
}
if (!ccat_eth_frame_sent(fifo->next)) {
netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
priv->stop_queue(priv->netdev);
return NETDEV_TX_BUSY;
}
/* prepare frame in DMA memory */
fifo->next->tx_flags = cpu_to_le32(0);
fifo->next->length = cpu_to_le16(skb->len);
memcpy(fifo->next->data, skb->data, skb->len);
/* Queue frame into CCAT TX-FIFO, CCAT ignores the first 8 bytes of the tx descriptor */
addr_and_length = offsetof(struct ccat_eth_frame, length);
addr_and_length += ((void *)fifo->next - fifo->dma.virt);
addr_and_length += ((skb->len + CCAT_ETH_FRAME_HEAD_LEN) / 8) << 24;
iowrite32(addr_and_length, priv->reg.tx_fifo);
/* update stats */
atomic64_add(skb->len, &priv->tx_bytes);
priv->kfree_skb_any(skb);
ccat_eth_fifo_inc(fifo);
/* stop queue if tx ring is full */
if (!ccat_eth_frame_sent(fifo->next)) {
priv->stop_queue(priv->netdev);
}
return NETDEV_TX_OK;
}
static inline struct tracing_map_elt *
__tracing_map_insert(struct tracing_map *map, void *key, bool lookup_only)
{
u32 idx, key_hash, test_key;
struct tracing_map_entry *entry;
key_hash = jhash(key, map->key_size, 0);
if (key_hash == 0)
key_hash = 1;
idx = key_hash >> (32 - (map->map_bits + 1));
while (1) {
idx &= (map->map_size - 1);
entry = TRACING_MAP_ENTRY(map->map, idx);
test_key = entry->key;
if (test_key && test_key == key_hash && entry->val &&
keys_match(key, entry->val->key, map->key_size)) {
if (!lookup_only)
atomic64_inc(&map->hits);
return entry->val;
}
if (!test_key) {
if (lookup_only)
break;
if (!cmpxchg(&entry->key, 0, key_hash)) {
struct tracing_map_elt *elt;
elt = get_free_elt(map);
if (!elt) {
atomic64_inc(&map->drops);
entry->key = 0;
break;
}
memcpy(elt->key, key, map->key_size);
entry->val = elt;
atomic64_inc(&map->hits);
return entry->val;
}
}
idx++;
}
return NULL;
}
const char *call_offer_ng(bencode_item_t *input, struct callmaster *m, bencode_item_t *output, const char* addr,
const struct sockaddr_in6 *sin)
{
if (m->conf.max_sessions>0) {
rwlock_lock_r(&m->hashlock);
if (g_hash_table_size(m->callhash) >= m->conf.max_sessions) {
rwlock_unlock_r(&m->hashlock);
atomic64_inc(&m->totalstats.total_rejected_sess);
atomic64_inc(&m->totalstats_interval.total_rejected_sess);
ilog(LOG_ERROR, "Parallel session limit reached (%i)",m->conf.max_sessions);
return "Parallel session limit reached";
}
rwlock_unlock_r(&m->hashlock);
}
return call_offer_answer_ng(input, m, output, OP_OFFER, addr, sin);
}
struct xnet_msg *xnet_alloc_msg(u8 alloc_flag)
{
struct xnet_msg *msg;
#ifndef USE_XNET_SIMPLE
/* fast method */
if (alloc_flag == XNET_MSG_CACHE)
return NULL;
/* slow method */
if (alloc_flag != XNET_MSG_NORMAL)
return NULL;
#endif
msg = xzalloc(sizeof(struct xnet_msg));
if (unlikely(!msg)) {
hvfs_err(xnet, "xzalloc() struct xnet_msg failed\n");
return NULL;
}
INIT_LIST_HEAD(&msg->list);
#ifdef USE_XNET_SIMPLE
sem_init(&msg->event, 0, 0);
atomic64_inc(&g_xnet_prof.msg_alloc);
atomic_set(&msg->ref, 1);
#endif
return msg;
}
static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct veth_priv *priv = netdev_priv(dev);
struct net_device *rcv;
int length = skb->len;
rcu_read_lock();
rcv = rcu_dereference(priv->peer);
if (unlikely(!rcv)) {
kfree_skb(skb);
goto drop;
}
/* don't change ip_summed == CHECKSUM_PARTIAL, as that
* will cause bad checksum on forwarded packets
*/
if (skb->ip_summed == CHECKSUM_NONE &&
rcv->features & NETIF_F_RXCSUM)
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (likely(dev_forward_skb(rcv, skb) == NET_RX_SUCCESS)) {
struct pcpu_vstats *stats = this_cpu_ptr(dev->vstats);
u64_stats_update_begin(&stats->syncp);
stats->bytes += length;
stats->packets++;
u64_stats_update_end(&stats->syncp);
} else {
drop:
atomic64_inc(&priv->dropped);
}
rcu_read_unlock();
return NETDEV_TX_OK;
}
static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct veth_priv *priv = netdev_priv(dev);
struct net_device *rcv;
int length = skb->len;
rcu_read_lock();
rcv = rcu_dereference(priv->peer);
if (unlikely(!rcv)) {
kfree_skb(skb);
goto drop;
}
if (likely(dev_forward_skb(rcv, skb) == NET_RX_SUCCESS)) {
struct pcpu_vstats *stats = this_cpu_ptr(dev->vstats);
u64_stats_update_begin(&stats->syncp);
stats->bytes += length;
stats->packets++;
u64_stats_update_end(&stats->syncp);
} else {
drop:
atomic64_inc(&priv->dropped);
}
rcu_read_unlock();
return NETDEV_TX_OK;
}
void quadd_put_sample(struct quadd_record_data *data,
struct quadd_iovec *vec, int vec_count)
{
struct quadd_comm_data_interface *comm = hrt.quadd_ctx->comm;
comm->put_sample(data, vec, vec_count);
atomic64_inc(&hrt.counter_samples);
}
void ceph_adjust_quota_realms_count(struct inode *inode, bool inc)
{
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
if (inc)
atomic64_inc(&mdsc->quotarealms_count);
else
atomic64_dec(&mdsc->quotarealms_count);
}
static void ibm_nx842_incr_hist(atomic64_t *times, unsigned int time)
{
int bucket = fls(time);
if (bucket)
bucket = min((NX842_HIST_SLOTS - 1), bucket - 1);
atomic64_inc(×[bucket]);
}
void VFP_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs)
{
u32 fpscr, orig_fpscr, fpsid, exceptions;
pr_debug("VFP: bounce: trigger %08x fpexc %08x\n", trigger, fpexc);
atomic64_inc(&vfp_bounce_count);
fmxr(FPEXC, fpexc & ~(FPEXC_EX|FPEXC_DEX|FPEXC_FP2V|FPEXC_VV|FPEXC_TRAP_MASK));
fpsid = fmrx(FPSID);
orig_fpscr = fpscr = fmrx(FPSCR);
if ((fpsid & FPSID_ARCH_MASK) == (1 << FPSID_ARCH_BIT)
&& (fpscr & FPSCR_IXE)) {
goto emulate;
}
if (fpexc & FPEXC_EX) {
#ifndef CONFIG_CPU_FEROCEON
trigger = fmrx(FPINST);
regs->ARM_pc -= 4;
#endif
} else if (!(fpexc & FPEXC_DEX)) {
vfp_raise_exceptions(VFP_EXCEPTION_ERROR, trigger, fpscr, regs);
goto exit;
}
if (fpexc & (FPEXC_EX | FPEXC_VV)) {
u32 len;
len = fpexc + (1 << FPEXC_LENGTH_BIT);
fpscr &= ~FPSCR_LENGTH_MASK;
fpscr |= (len & FPEXC_LENGTH_MASK) << (FPSCR_LENGTH_BIT - FPEXC_LENGTH_BIT);
}
exceptions = vfp_emulate_instruction(trigger, fpscr, regs);
if (exceptions)
vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs);
/*
* If there isn't a second FP instruction, exit now. Note that
* the FPEXC.FP2V bit is valid only if FPEXC.EX is 1.
*/
if ((fpexc & (FPEXC_EX | FPEXC_FP2V)) != (FPEXC_EX | FPEXC_FP2V))
goto exit;
barrier();
trigger = fmrx(FPINST2);
emulate:
exceptions = vfp_emulate_instruction(trigger, orig_fpscr, regs);
if (exceptions)
vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs);
exit:
preempt_enable();
}
void xnet_raw_free_msg(struct xnet_msg *msg)
{
if (atomic_dec_return(&msg->ref) == 0) {
/* FIXME: check whether this msg is in the cache */
xfree(msg);
#ifdef USE_XNET_SIMPLE
atomic64_inc(&g_xnet_prof.msg_free);
#endif
}
}
static netdev_tx_t ccat_eth_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ccat_eth_priv *const priv = netdev_priv(dev);
struct ccat_eth_fifo *const fifo = &priv->tx_fifo;
if (skb_is_nonlinear(skb)) {
pr_warn("Non linear skb not supported -> drop frame.\n");
atomic64_inc(&fifo->dropped);
priv->kfree_skb_any(skb);
return NETDEV_TX_OK;
}
if (skb->len > MAX_PAYLOAD_SIZE) {
pr_warn("skb.len %llu exceeds dma buffer %llu -> drop frame.\n",
(u64) skb->len, (u64) MAX_PAYLOAD_SIZE);
atomic64_inc(&fifo->dropped);
priv->kfree_skb_any(skb);
return NETDEV_TX_OK;
}
if (!fifo->ops->ready(fifo)) {
netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
priv->stop_queue(priv->netdev);
return NETDEV_TX_BUSY;
}
/* prepare frame in DMA memory */
fifo->ops->queue.skb(fifo, skb);
/* update stats */
atomic64_add(skb->len, &fifo->bytes);
priv->kfree_skb_any(skb);
ccat_eth_fifo_inc(fifo);
/* stop queue if tx ring is full */
if (!fifo->ops->ready(fifo)) {
priv->stop_queue(priv->netdev);
}
return NETDEV_TX_OK;
}
/**
* update_vttbr - Update the VTTBR with a valid VMID before the guest runs
* @kvm The guest that we are about to run
*
* Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the
* VM has a valid VMID, otherwise assigns a new one and flushes corresponding
* caches and TLBs.
*/
static void update_vttbr(struct kvm *kvm)
{
phys_addr_t pgd_phys;
u64 vmid;
if (!need_new_vmid_gen(kvm))
return;
spin_lock(&kvm_vmid_lock);
/*
* We need to re-check the vmid_gen here to ensure that if another vcpu
* already allocated a valid vmid for this vm, then this vcpu should
* use the same vmid.
*/
if (!need_new_vmid_gen(kvm)) {
spin_unlock(&kvm_vmid_lock);
return;
}
/* First user of a new VMID generation? */
if (unlikely(kvm_next_vmid == 0)) {
atomic64_inc(&kvm_vmid_gen);
kvm_next_vmid = 1;
/*
* On SMP we know no other CPUs can use this CPU's or each
* other's VMID after force_vm_exit returns since the
* kvm_vmid_lock blocks them from reentry to the guest.
*/
force_vm_exit(cpu_all_mask);
/*
* Now broadcast TLB + ICACHE invalidation over the inner
* shareable domain to make sure all data structures are
* clean.
*/
kvm_call_hyp(__kvm_flush_vm_context);
}
kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen);
kvm->arch.vmid = kvm_next_vmid;
kvm_next_vmid++;
kvm_next_vmid &= (1 << kvm_vmid_bits) - 1;
/* update vttbr to be used with the new vmid */
pgd_phys = virt_to_phys(kvm->arch.pgd);
BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK);
vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK(kvm_vmid_bits);
kvm->arch.vttbr = pgd_phys | vmid;
spin_unlock(&kvm_vmid_lock);
}
static irqreturn_t fnic_isr_msix_err_notify(int irq, void *data)
{
struct fnic *fnic = data;
fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
vnic_intr_return_all_credits(&fnic->intr[FNIC_MSIX_ERR_NOTIFY]);
fnic_log_q_error(fnic);
fnic_handle_link_event(fnic);
return IRQ_HANDLED;
}
static irqreturn_t fnic_isr_msix_wq_copy(int irq, void *data)
{
struct fnic *fnic = data;
unsigned long wq_copy_work_done = 0;
fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
wq_copy_work_done = fnic_wq_copy_cmpl_handler(fnic, -1);
vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ_COPY],
wq_copy_work_done,
1 /* unmask intr */,
1 /* reset intr timer */);
return IRQ_HANDLED;
}
void mds_forward(struct xnet_msg *msg)
{
struct mds_fwd *mf;
struct xnet_msg_tx *tx;
/* FIXME: we know we are using xnet-simple, so all the receiving iovs are
* packed into one buf, we should save the begin address here */
xnet_set_auto_free(msg);
/* sanity checking */
if (likely(msg->xm_datacheck)) {
tx = msg->xm_data;
mf = msg->xm_data + tx->len + sizeof(*tx);
} else {
hvfs_err(mds, "Internal error, data lossing ...\n");
goto out;
}
#if 0
{
int i, pos = 0;
char line[256];
memset(line, 0, sizeof(line));
pos += snprintf(line, 256, "FW request from %lx route ", tx->ssite_id);
for (i = 0; i < ((mf->len - sizeof(*mf)) / sizeof(u32)); i++) {
pos += snprintf(line + pos, 256 - pos, "%lx->", mf->route[i]);
}
pos += snprintf(line + pos, 256 - pos, "%lx(E).\n", hmo.site_id);
hvfs_err(mds, "%s", line);
}
#endif
memcpy(&msg->tx, tx, sizeof(*tx));
/* FIXME: we know there is only one iov entry */
msg->tx.flag |= (XNET_PTRESTORE | XNET_FWD);
msg->tx.reserved = (u64)msg->xm_data;
msg->xm_data += sizeof(*tx);
msg->tx.dsite_id = hmo.site_id;
atomic64_inc(&hmo.prof.mds.forward);
mds_fe_dispatch(msg);
return;
out:
xnet_free_msg(msg);
}
static struct hone_event *__add_files(struct hone_reader *reader,
struct hone_event *event, struct task_struct *task)
{
struct hone_event *sk_event;
struct files_struct *files;
struct file *file;
struct fdtable *fdt;
struct socket *sock;
struct sock *sk;
unsigned long flags, set;
int i, fd;
if (!(files = get_files_struct(task)))
return event;
spin_lock_irqsave(&files->file_lock, flags);
if (!(fdt = files_fdtable(files)))
goto out;
for (i = 0; (fd = i * BITS_PER_LONG) < fdt->max_fds; i++) {
for (set = fdt->OPEN_FDS[i]; set; set >>= 1, fd++) {
if (!(set & 1))
continue;
file = fdt->fd[fd];
if (!file || file->f_op != &socket_file_ops || !file->private_data)
continue;
sock = file->private_data;
sk = sock->sk;
if (!sk || (sk->sk_family != PF_INET && sk->sk_family != PF_INET6))
continue;
if ((sk_event = __alloc_socket_event((unsigned long) sk,
0, task, GFP_ATOMIC))) {
sk_event->next = event;
event = sk_event;
memcpy(&event->ts, &task->start_time, sizeof(event->ts));
} else {
atomic64_inc(&reader->info.dropped.socket);
}
}
}
out:
spin_unlock_irqrestore(&files->file_lock, flags);
put_files_struct(files);
return event;
}
static void inc_stats_counter(struct statistics *stats, int type)
{
atomic64_t *counter;
switch(type) {
case HONE_PROCESS:
counter = &stats->process;
break;
case HONE_SOCKET:
counter = &stats->socket;
break;
case HONE_PACKET:
counter = &stats->packet;
break;
default:
return;
}
atomic64_inc(counter);
}
static void ccat_eth_receive(struct net_device *const dev,
const void *const data, const size_t len)
{
struct sk_buff *const skb = dev_alloc_skb(len + NET_IP_ALIGN);
struct ccat_eth_priv *const priv = netdev_priv(dev);
if (!skb) {
pr_info("%s() out of memory :-(\n", __FUNCTION__);
atomic64_inc(&priv->rx_dropped);
return;
}
skb->dev = dev;
skb_reserve(skb, NET_IP_ALIGN);
skb_copy_to_linear_data(skb, data, len);
skb_put(skb, len);
skb->protocol = eth_type_trans(skb, dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
atomic64_add(len, &priv->rx_bytes);
netif_rx(skb);
}
static void ccat_eth_receive(struct ccat_eth_priv *const priv, const size_t len)
{
struct sk_buff *const skb = dev_alloc_skb(len + NET_IP_ALIGN);
struct ccat_eth_fifo *const fifo = &priv->rx_fifo;
struct net_device *const dev = priv->netdev;
if (!skb) {
pr_info("%s() out of memory :-(\n", __FUNCTION__);
atomic64_inc(&fifo->dropped);
return;
}
skb->dev = dev;
skb_reserve(skb, NET_IP_ALIGN);
fifo->ops->queue.copy_to_skb(fifo, skb, len);
skb_put(skb, len);
skb->protocol = eth_type_trans(skb, dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
atomic64_add(len, &fifo->bytes);
netif_rx(skb);
}
static int inline enqueue_event(struct hone_reader *reader,
struct hone_event *event)
{
// Ignore threads for now
if (event->type == HONE_PROCESS && event->process.pid != event->process.tgid)
return 0;
// Filter out packets for local socket, if set
if (event->type == HONE_PACKET && reader->filter_sk &&
event->packet.sock == (unsigned long) reader->filter_sk) {
atomic64_inc(&reader->info.filtered);
return 0;
}
get_hone_event(event);
if (ring_append(&reader->ringbuf, event)) {
inc_stats_counter(&reader->info.dropped, event->type);
put_hone_event(event);
return 0;
}
return 1;
}
void xnet_free_msg(struct xnet_msg *msg)
{
if (!msg)
return;
if (atomic_dec_return(&msg->ref) > 0) {
return;
}
/* Note that, change reqno to zero to prohibit the current access to the
* xnet_msg by xnet_handle_tx() */
msg->tx.reqno = 0;
/* FIXME: we should check the alloc_flag and auto free flag */
if (msg->pair)
xnet_free_msg(msg->pair);
if (unlikely(msg->tx.flag & XNET_PTRESTORE)) {
msg->xm_data = (void *)msg->tx.reserved;
}
if (msg->tx.flag & XNET_NEED_DATA_FREE) {
if (msg->tx.type == XNET_MSG_REQ) {
/* check and free the siov */
xnet_msg_free_sdata(msg);
xnet_msg_free_rdata(msg);
} else if (msg->tx.type == XNET_MSG_RPY) {
/* check and free the riov */
xnet_msg_free_sdata(msg);
xnet_msg_free_rdata(msg);
} else {
/* FIXME: do we need to free the data region */
}
} else {
if (msg->siov)
xfree(msg->siov);
if (msg->riov)
xfree(msg->riov);
}
xfree(msg);
#ifdef USE_XNET_SIMPLE
atomic64_inc(&g_xnet_prof.msg_free);
#endif
}
static struct hone_event *add_current_tasks(
struct hone_reader *reader, struct hone_event *event)
{
struct hone_event *proc_event;
struct task_struct *task;
rcu_read_lock();
for (task = &init_task; (task = prev_task(task)) != &init_task; ) {
if (task->flags & PF_EXITING)
continue;
event = __add_files(reader, event, task);
if ((proc_event = __alloc_process_event(task,
task->flags & PF_FORKNOEXEC ? PROC_FORK : PROC_EXEC,
GFP_ATOMIC))) {
proc_event->next = event;
event = proc_event;
memcpy(&event->ts, &task->start_time, sizeof(event->ts));
} else {
atomic64_inc(&reader->info.dropped.process);
}
}
rcu_read_unlock();
return event;
}
static irqreturn_t fnic_isr_legacy(int irq, void *data)
{
struct fnic *fnic = data;
u32 pba;
unsigned long work_done = 0;
pba = vnic_intr_legacy_pba(fnic->legacy_pba);
if (!pba)
return IRQ_NONE;
fnic->fnic_stats.misc_stats.last_isr_time = jiffies;
atomic64_inc(&fnic->fnic_stats.misc_stats.isr_count);
if (pba & (1 << FNIC_INTX_NOTIFY)) {
vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_NOTIFY]);
fnic_handle_link_event(fnic);
}
if (pba & (1 << FNIC_INTX_ERR)) {
vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_ERR]);
fnic_log_q_error(fnic);
}
if (pba & (1 << FNIC_INTX_WQ_RQ_COPYWQ)) {
work_done += fnic_wq_copy_cmpl_handler(fnic, -1);
work_done += fnic_wq_cmpl_handler(fnic, -1);
work_done += fnic_rq_cmpl_handler(fnic, -1);
vnic_intr_return_credits(&fnic->intr[FNIC_INTX_WQ_RQ_COPYWQ],
work_done,
1 /* unmask intr */,
1 /* reset intr timer */);
}
return IRQ_HANDLED;
}
/*
* Package up a bounce condition.
*/
void VFP_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs)
{
u32 fpscr, orig_fpscr, fpsid, exceptions;
pr_debug("VFP: bounce: trigger %08x fpexc %08x\n", trigger, fpexc);
atomic64_inc(&vfp_bounce_count);
/*
* At this point, FPEXC can have the following configuration:
*
* EX DEX IXE
* 0 1 x - synchronous exception
* 1 x 0 - asynchronous exception
* 1 x 1 - sychronous on VFP subarch 1 and asynchronous on later
* 0 0 1 - synchronous on VFP9 (non-standard subarch 1
* implementation), undefined otherwise
*
* Clear various bits and enable access to the VFP so we can
* handle the bounce.
*/
fmxr(FPEXC, fpexc & ~(FPEXC_EX|FPEXC_DEX|FPEXC_FP2V|FPEXC_VV|FPEXC_TRAP_MASK));
fpsid = fmrx(FPSID);
orig_fpscr = fpscr = fmrx(FPSCR);
/*
* Check for the special VFP subarch 1 and FPSCR.IXE bit case
*/
if ((fpsid & FPSID_ARCH_MASK) == (1 << FPSID_ARCH_BIT)
&& (fpscr & FPSCR_IXE)) {
/*
* Synchronous exception, emulate the trigger instruction
*/
goto emulate;
}
if (fpexc & FPEXC_EX) {
#ifndef CONFIG_CPU_FEROCEON
/*
* Asynchronous exception. The instruction is read from FPINST
* and the interrupted instruction has to be restarted.
*/
trigger = fmrx(FPINST);
regs->ARM_pc -= 4;
#endif
} else if (!(fpexc & FPEXC_DEX)) {
/*
* Illegal combination of bits. It can be caused by an
* unallocated VFP instruction but with FPSCR.IXE set and not
* on VFP subarch 1.
*/
vfp_raise_exceptions(VFP_EXCEPTION_ERROR, trigger, fpscr, regs);
goto exit;
}
/*
* Modify fpscr to indicate the number of iterations remaining.
* If FPEXC.EX is 0, FPEXC.DEX is 1 and the FPEXC.VV bit indicates
* whether FPEXC.VECITR or FPSCR.LEN is used.
*/
if (fpexc & (FPEXC_EX | FPEXC_VV)) {
u32 len;
len = fpexc + (1 << FPEXC_LENGTH_BIT);
fpscr &= ~FPSCR_LENGTH_MASK;
fpscr |= (len & FPEXC_LENGTH_MASK) << (FPSCR_LENGTH_BIT - FPEXC_LENGTH_BIT);
}
/*
* Handle the first FP instruction. We used to take note of the
* FPEXC bounce reason, but this appears to be unreliable.
* Emulate the bounced instruction instead.
*/
exceptions = vfp_emulate_instruction(trigger, fpscr, regs);
if (exceptions)
vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs);
/*
* If there isn't a second FP instruction, exit now. Note that
* the FPEXC.FP2V bit is valid only if FPEXC.EX is 1.
*/
if ((fpexc & (FPEXC_EX | FPEXC_FP2V)) != (FPEXC_EX | FPEXC_FP2V))
goto exit;
/*
* The barrier() here prevents fpinst2 being read
* before the condition above.
*/
barrier();
trigger = fmrx(FPINST2);
emulate:
exceptions = vfp_emulate_instruction(trigger, orig_fpscr, regs);
if (exceptions)
vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs);
exit:
preempt_enable();
}
int mds_do_forward(struct xnet_msg *msg, u64 dsite)
{
int err = 0, i, relaied = 0, looped = 0;
/* Note that lots of forward request may incur the system performance, we
* should do fast forwarding and fast bitmap changing. */
struct mds_fwd *mf = NULL, *rmf = NULL;
struct xnet_msg *fmsg;
if (unlikely(msg->tx.flag & XNET_FWD)) {
atomic64_inc(&hmo.prof.mds.loop_fwd);
/* check if this message is looped. if it is looped, we should refresh
* the bitmap and just forward the message as normal. until receive
* the second looped request, we stop or slow down the request */
rmf = (struct mds_fwd *)((void *)(msg->tx.reserved) +
msg->tx.len + sizeof(msg->tx));
looped = __mds_fwd_loop_detect(rmf, dsite);
if (unlikely((atomic64_read(&hmo.prof.mds.loop_fwd) + 1) %
MAX_RELAY_FWD == 0)) {
/* we should trigger the bitmap reload now */
mds_bitmap_refresh(msg->xm_data);
}
relaied = 1;
}
mf = xzalloc(sizeof(*mf) + MDS_FWD_MAX * sizeof(u32));
if (!mf) {
hvfs_err(mds, "alloc mds_fwd failed.\n");
err = -ENOMEM;
goto out;
}
mf->len = MDS_FWD_MAX * sizeof(u32) + sizeof(*mf);
switch (looped) {
case 0:
/* not looped request */
mf->route[0] = hmo.site_id;
break;
case 1:
/* first loop, copy the entries */
au_handle_split_sync();
for (i = 0; i < MDS_FWD_MAX; i++) {
if (rmf->route[i] != 0)
mf->route[i] = rmf->route[i];
else
break;
}
if (i < MDS_FWD_MAX)
mf->route[i] = hmo.site_id;
break;
case 2:
/* second loop, slow down the forwarding */
au_handle_split_sync();
for (i = 0; i < MDS_FWD_MAX; i++) {
if (rmf->route[i] != 0)
mf->route[i] = rmf->route[i];
else
break;
}
if (i < MDS_FWD_MAX)
mf->route[i] = hmo.site_id;
break;
default:;
}
fmsg = xnet_alloc_msg(XNET_MSG_CACHE);
if (!fmsg) {
hvfs_err(mds, "xnet_alloc_msg() failed, we should retry!\n");
err = -ENOMEM;
goto out_free;
}
#ifdef XNET_EAGER_WRITEV
xnet_msg_add_sdata(fmsg, &fmsg->tx, sizeof(fmsg->tx));
#endif
xnet_msg_set_err(fmsg, err);
xnet_msg_fill_tx(fmsg, XNET_MSG_REQ, 0, hmo.site_id, dsite);
xnet_msg_fill_cmd(fmsg, HVFS_MDS2MDS_FWREQ, 0, 0);
xnet_msg_add_sdata(fmsg, &msg->tx, sizeof(msg->tx));
if (msg->xm_datacheck) {
if (unlikely(relaied)) {
xnet_msg_add_sdata(fmsg, msg->xm_data, msg->tx.len);
} else {
for (i = 0; i < msg->riov_ulen; i++) {
xnet_msg_add_sdata(fmsg, msg->riov[i].iov_base,
msg->riov[i].iov_len);
}
}
}
/* piggyback the route info @ the last iov entry */
xnet_msg_add_sdata(fmsg, mf, mf->len);
err = xnet_send(hmo.xc, fmsg);
if (err) {
hvfs_err(mds, "Forwarding the request to %lx failed w/ %d.\n",
dsite, err);
}
/* cleaning */
xnet_clear_auto_free(fmsg);
xnet_free_msg(fmsg);
out_free:
xfree(mf);
out:
return err;
}
struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct the_nilfs *nilfs = sb->s_fs_info;
struct inode *inode;
struct nilfs_inode_info *ii;
struct nilfs_root *root;
int err = -ENOMEM;
ino_t ino;
inode = new_inode(sb);
if (unlikely(!inode))
goto failed;
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
root = NILFS_I(dir)->i_root;
ii = NILFS_I(inode);
ii->i_state = 1 << NILFS_I_NEW;
ii->i_root = root;
err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
if (unlikely(err))
goto failed_ifile_create_inode;
/* reference count of i_bh inherits from nilfs_mdt_read_block() */
atomic64_inc(&root->inodes_count);
inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
err = nilfs_bmap_read(ii->i_bmap, NULL);
if (err < 0)
goto failed_bmap;
set_bit(NILFS_I_BMAP, &ii->i_state);
/* No lock is needed; iget() ensures it. */
}
ii->i_flags = nilfs_mask_flags(
mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);
/* ii->i_file_acl = 0; */
/* ii->i_dir_acl = 0; */
ii->i_dir_start_lookup = 0;
nilfs_set_inode_flags(inode);
spin_lock(&nilfs->ns_next_gen_lock);
inode->i_generation = nilfs->ns_next_generation++;
spin_unlock(&nilfs->ns_next_gen_lock);
insert_inode_hash(inode);
err = nilfs_init_acl(inode, dir);
if (unlikely(err))
goto failed_acl; /* never occur. When supporting
nilfs_init_acl(), proper cancellation of
above jobs should be considered */
return inode;
failed_acl:
failed_bmap:
clear_nlink(inode);
iput(inode); /* raw_inode will be deleted through
generic_delete_inode() */
goto failed;
failed_ifile_create_inode:
make_bad_inode(inode);
iput(inode); /* if i_nlink == 1, generic_forget_inode() will be
called */
failed:
return ERR_PTR(err);
}
static __init void test_atomic64(void)
{
long long v0 = 0xaaa31337c001d00dLL;
long long v1 = 0xdeadbeefdeafcafeLL;
long long v2 = 0xfaceabadf00df001LL;
long long onestwos = 0x1111111122222222LL;
long long one = 1LL;
atomic64_t v = ATOMIC64_INIT(v0);
long long r = v0;
BUG_ON(v.counter != r);
atomic64_set(&v, v1);
r = v1;
BUG_ON(v.counter != r);
BUG_ON(atomic64_read(&v) != r);
TEST(64, add, +=, onestwos);
TEST(64, add, +=, -one);
TEST(64, sub, -=, onestwos);
TEST(64, sub, -=, -one);
TEST(64, or, |=, v1);
TEST(64, and, &=, v1);
TEST(64, xor, ^=, v1);
TEST(64, andnot, &= ~, v1);
RETURN_FAMILY_TEST(64, add_return, +=, onestwos);
RETURN_FAMILY_TEST(64, add_return, +=, -one);
RETURN_FAMILY_TEST(64, sub_return, -=, onestwos);
RETURN_FAMILY_TEST(64, sub_return, -=, -one);
FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos);
FETCH_FAMILY_TEST(64, fetch_add, +=, -one);
FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos);
FETCH_FAMILY_TEST(64, fetch_sub, -=, -one);
FETCH_FAMILY_TEST(64, fetch_or, |=, v1);
FETCH_FAMILY_TEST(64, fetch_and, &=, v1);
FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1);
FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1);
INIT(v0);
atomic64_inc(&v);
r += one;
BUG_ON(v.counter != r);
INIT(v0);
atomic64_dec(&v);
r -= one;
BUG_ON(v.counter != r);
INC_RETURN_FAMILY_TEST(64, v0);
DEC_RETURN_FAMILY_TEST(64, v0);
XCHG_FAMILY_TEST(64, v0, v1);
CMPXCHG_FAMILY_TEST(64, v0, v1, v2);
INIT(v0);
BUG_ON(atomic64_add_unless(&v, one, v0));
BUG_ON(v.counter != r);
INIT(v0);
BUG_ON(!atomic64_add_unless(&v, one, v1));
r += one;
BUG_ON(v.counter != r);
INIT(onestwos);
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
r -= one;
BUG_ON(v.counter != r);
INIT(0);
BUG_ON(atomic64_dec_if_positive(&v) != -one);
BUG_ON(v.counter != r);
INIT(-one);
BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
BUG_ON(v.counter != r);
INIT(onestwos);
BUG_ON(!atomic64_inc_not_zero(&v));
r += one;
BUG_ON(v.counter != r);
INIT(0);
BUG_ON(atomic64_inc_not_zero(&v));
BUG_ON(v.counter != r);
INIT(-one);
BUG_ON(!atomic64_inc_not_zero(&v));
r += one;
BUG_ON(v.counter != r);
}
static __init int test_atomic64(void)
{
long long v0 = 0xaaa31337c001d00dLL;
long long v1 = 0xdeadbeefdeafcafeLL;
long long v2 = 0xfaceabadf00df001LL;
long long onestwos = 0x1111111122222222LL;
long long one = 1LL;
atomic64_t v = ATOMIC64_INIT(v0);
long long r = v0;
BUG_ON(v.counter != r);
atomic64_set(&v, v1);
r = v1;
BUG_ON(v.counter != r);
BUG_ON(atomic64_read(&v) != r);
INIT(v0);
atomic64_add(onestwos, &v);
r += onestwos;
BUG_ON(v.counter != r);
INIT(v0);
atomic64_add(-one, &v);
r += -one;
BUG_ON(v.counter != r);
INIT(v0);
r += onestwos;
BUG_ON(atomic64_add_return(onestwos, &v) != r);
BUG_ON(v.counter != r);
INIT(v0);
r += -one;
BUG_ON(atomic64_add_return(-one, &v) != r);
BUG_ON(v.counter != r);
INIT(v0);
atomic64_sub(onestwos, &v);
r -= onestwos;
BUG_ON(v.counter != r);
INIT(v0);
atomic64_sub(-one, &v);
r -= -one;
BUG_ON(v.counter != r);
INIT(v0);
r -= onestwos;
BUG_ON(atomic64_sub_return(onestwos, &v) != r);
BUG_ON(v.counter != r);
INIT(v0);
r -= -one;
BUG_ON(atomic64_sub_return(-one, &v) != r);
BUG_ON(v.counter != r);
INIT(v0);
atomic64_inc(&v);
r += one;
BUG_ON(v.counter != r);
INIT(v0);
r += one;
BUG_ON(atomic64_inc_return(&v) != r);
BUG_ON(v.counter != r);
INIT(v0);
atomic64_dec(&v);
r -= one;
BUG_ON(v.counter != r);
INIT(v0);
r -= one;
BUG_ON(atomic64_dec_return(&v) != r);
BUG_ON(v.counter != r);
INIT(v0);
BUG_ON(atomic64_xchg(&v, v1) != v0);
r = v1;
BUG_ON(v.counter != r);
INIT(v0);
BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
r = v1;
BUG_ON(v.counter != r);
INIT(v0);
BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
BUG_ON(v.counter != r);
INIT(v0);
BUG_ON(atomic64_add_unless(&v, one, v0));
BUG_ON(v.counter != r);
INIT(v0);
BUG_ON(!atomic64_add_unless(&v, one, v1));
r += one;
BUG_ON(v.counter != r);
#ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
INIT(onestwos);
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
r -= one;
BUG_ON(v.counter != r);
INIT(0);
BUG_ON(atomic64_dec_if_positive(&v) != -one);
BUG_ON(v.counter != r);
INIT(-one);
BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
BUG_ON(v.counter != r);
#else
#warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
#endif
INIT(onestwos);
BUG_ON(!atomic64_inc_not_zero(&v));
r += one;
BUG_ON(v.counter != r);
INIT(0);
BUG_ON(atomic64_inc_not_zero(&v));
BUG_ON(v.counter != r);
INIT(-one);
BUG_ON(!atomic64_inc_not_zero(&v));
r += one;
BUG_ON(v.counter != r);
#ifdef CONFIG_X86
pr_info("passed for %s platform %s CX8 and %s SSE\n",
#ifdef CONFIG_X86_64
"x86-64",
#elif defined(CONFIG_X86_CMPXCHG64)
"i586+",
#else
"i386+",
#endif
boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
#else
pr_info("passed\n");
#endif
return 0;
}