void CCodeGenerator::operator()(Assignment* expr) {
// Handle all types of assignment, including member assignment
Expression::Ptr init = expr->initializer();
if (dynamic_cast<Empty*>(init.pointer())) {
return_ = Operand(env_->integer("0"));
} else {
return_ = emit(init);
}
String::Ptr id = expr->identifier();
Variable::Ptr var = variable(id);
Attribute::Ptr attr = class_ ? class_->attribute(id) : 0;
if (var) {
// Assignment to a local var that has already been initialized once in
// the current scope.
Type::Ptr type = var->type();
if (!type->is_value()) {
refcount_dec(Operand(var->name()));
}
line();
out_ << id->string() << " = " << return_ << ";\n";
if (!type->is_value()) {
refcount_inc(Operand(var->name()));
}
} else if (attr) {
// Assignment to an attribute within a class
/*
Type::Ptr type = expr->type();
Variable::Ptr self = variable(env_->name("__self"));
Operand addr = Operand::addr(, attr->slot());
Operand old = load(addr);
if (!type->is_value() && !attr->is_weak()) {
refcount_dec(old);
}
store(addr, return_);
if (!type->is_value() && !attr->is_weak()) {
refcount_inc(return_);
}
*/
assert(!"not impl");
} else {
// Assignment to a local var that has not yet been initialized in the
// current scope.
Type::Ptr declared = expr->declared_type();
if (declared->is_top()) {
declared = expr->type();
}
line();
brace();
operator()(declared);
out_ << " " << id->string() << " = " << return_ << "; ";
out_ << "(void)" << id->string() << ";\n";
variable(new Variable(id, declared));
if (!declared->is_value()) {
refcount_inc(return_);
}
}
}
static int ip_frag_reinit(struct ipq *qp)
{
struct sk_buff *fp;
unsigned int sum_truesize = 0;
if (!mod_timer(&qp->q.timer, jiffies + qp->q.net->timeout)) {
refcount_inc(&qp->q.refcnt);
return -ETIMEDOUT;
}
fp = qp->q.fragments;
do {
struct sk_buff *xp = fp->next;
sum_truesize += fp->truesize;
kfree_skb(fp);
fp = xp;
} while (fp);
sub_frag_mem_limit(qp->q.net, sum_truesize);
qp->q.flags = 0;
qp->q.len = 0;
qp->q.meat = 0;
qp->q.fragments = NULL;
qp->q.fragments_tail = NULL;
qp->iif = 0;
qp->ecn = 0;
return 0;
}
static in_cache_entry *in_cache_add_entry(__be32 dst_ip,
struct mpoa_client *client)
{
in_cache_entry *entry = kzalloc(sizeof(in_cache_entry), GFP_KERNEL);
if (entry == NULL) {
pr_info("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n");
return NULL;
}
dprintk("adding an ingress entry, ip = %pI4\n", &dst_ip);
refcount_set(&entry->use, 1);
dprintk("new_in_cache_entry: about to lock\n");
write_lock_bh(&client->ingress_lock);
entry->next = client->in_cache;
entry->prev = NULL;
if (client->in_cache != NULL)
client->in_cache->prev = entry;
client->in_cache = entry;
memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
entry->ctrl_info.in_dst_ip = dst_ip;
do_gettimeofday(&(entry->tv));
entry->retry_time = client->parameters.mpc_p4;
entry->count = 1;
entry->entry_state = INGRESS_INVALID;
entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT;
refcount_inc(&entry->use);
write_unlock_bh(&client->ingress_lock);
dprintk("new_in_cache_entry: unlocked\n");
return entry;
}
static struct input_stream *
bz2_open_stream(struct archive_file *file, const char *path,
GMutex *mutex, GCond *cond,
GError **error_r)
{
struct bz2_archive_file *context = (struct bz2_archive_file *) file;
struct bz2_input_stream *bis = g_new(struct bz2_input_stream, 1);
input_stream_init(&bis->base, &bz2_inputplugin, path,
mutex, cond);
bis->archive = context;
bis->base.ready = true;
bis->base.seekable = false;
if (!bz2_alloc(bis, error_r)) {
input_stream_deinit(&bis->base);
g_free(bis);
return NULL;
}
bis->eof = false;
refcount_inc(&context->ref);
return &bis->base;
}
/**
* vb2_common_vm_open() - increase refcount of the vma
* @vma: virtual memory region for the mapping
*
* This function adds another user to the provided vma. It expects
* struct vb2_vmarea_handler pointer in vma->vm_private_data.
*/
static void vb2_common_vm_open(struct vm_area_struct *vma)
{
struct vb2_vmarea_handler *h = vma->vm_private_data;
pr_debug("%s: %p, refcount: %d, vma: %08lx-%08lx\n",
__func__, h, refcount_read(h->refcount), vma->vm_start,
vma->vm_end);
refcount_inc(h->refcount);
}
struct mdesc_handle *mdesc_grab(void)
{
struct mdesc_handle *hp;
unsigned long flags;
spin_lock_irqsave(&mdesc_lock, flags);
hp = cur_mdesc;
if (hp)
refcount_inc(&hp->refcnt);
spin_unlock_irqrestore(&mdesc_lock, flags);
return hp;
}
void CCodeGenerator::operator()(Return* statement) {
Expression::Ptr expr = statement->expression();
source_line(statement);
if (!dynamic_cast<Empty*>(expr.pointer())) {
Operand ret = emit(expr);
return_val_ = ret;
// Increment the refcount if the returned value is an object. The
// refcount must be incremented so that the object won't be freed
// when the function returns. It is the caller's responsibility to
// correctly free the returned object.
if (!expr->type()->is_value()) {
refcount_inc(ret);
}
}
block_has_return_ = true;
}
struct sk_buff *__skb_try_recv_from_queue(struct sock *sk,
struct sk_buff_head *queue,
unsigned int flags,
void (*destructor)(struct sock *sk,
struct sk_buff *skb),
int *peeked, int *off, int *err,
struct sk_buff **last)
{
bool peek_at_off = false;
struct sk_buff *skb;
int _off = 0;
if (unlikely(flags & MSG_PEEK && *off >= 0)) {
peek_at_off = true;
_off = *off;
}
*last = queue->prev;
skb_queue_walk(queue, skb) {
if (flags & MSG_PEEK) {
if (peek_at_off && _off >= skb->len &&
(_off || skb->peeked)) {
_off -= skb->len;
continue;
}
if (!skb->len) {
skb = skb_set_peeked(skb);
if (unlikely(IS_ERR(skb))) {
*err = PTR_ERR(skb);
return NULL;
}
}
*peeked = 1;
refcount_inc(&skb->users);
} else {
__skb_unlink(skb, queue);
if (destructor)
destructor(sk, skb);
}
*off = _off;
return skb;
}
return NULL;
}
static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id,
struct mpoa_client *mpc)
{
eg_cache_entry *entry;
read_lock_irq(&mpc->egress_lock);
entry = mpc->eg_cache;
while (entry != NULL) {
if (entry->ctrl_info.cache_id == cache_id) {
refcount_inc(&entry->use);
read_unlock_irq(&mpc->egress_lock);
return entry;
}
entry = entry->next;
}
read_unlock_irq(&mpc->egress_lock);
return NULL;
}
static in_cache_entry *in_cache_get(__be32 dst_ip,
struct mpoa_client *client)
{
in_cache_entry *entry;
read_lock_bh(&client->ingress_lock);
entry = client->in_cache;
while (entry != NULL) {
if (entry->ctrl_info.in_dst_ip == dst_ip) {
refcount_inc(&entry->use);
read_unlock_bh(&client->ingress_lock);
return entry;
}
entry = entry->next;
}
read_unlock_bh(&client->ingress_lock);
return NULL;
}
/* This can be called from any context since it saves CPU flags */
static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc)
{
unsigned long flags;
eg_cache_entry *entry;
read_lock_irqsave(&mpc->egress_lock, flags);
entry = mpc->eg_cache;
while (entry != NULL) {
if (entry->ctrl_info.tag == tag) {
refcount_inc(&entry->use);
read_unlock_irqrestore(&mpc->egress_lock, flags);
return entry;
}
entry = entry->next;
}
read_unlock_irqrestore(&mpc->egress_lock, flags);
return NULL;
}
static int add_cgroup(struct perf_evlist *evlist, char *str)
{
struct perf_evsel *counter;
struct cgroup_sel *cgrp = NULL;
int n;
/*
* check if cgrp is already defined, if so we reuse it
*/
evlist__for_each_entry(evlist, counter) {
cgrp = counter->cgrp;
if (!cgrp)
continue;
if (!strcmp(cgrp->name, str)) {
refcount_inc(&cgrp->refcnt);
break;
}
cgrp = NULL;
}
static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr,
struct mpoa_client *mpc)
{
eg_cache_entry *entry;
read_lock_irq(&mpc->egress_lock);
entry = mpc->eg_cache;
while (entry != NULL) {
if (entry->latest_ip_addr == ipaddr) {
refcount_inc(&entry->use);
read_unlock_irq(&mpc->egress_lock);
return entry;
}
entry = entry->next;
}
read_unlock_irq(&mpc->egress_lock);
return NULL;
}
static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc,
struct mpoa_client *client)
{
in_cache_entry *entry;
read_lock_bh(&client->ingress_lock);
entry = client->in_cache;
while (entry != NULL) {
if (entry->shortcut == vcc) {
refcount_inc(&entry->use);
read_unlock_bh(&client->ingress_lock);
return entry;
}
entry = entry->next;
}
read_unlock_bh(&client->ingress_lock);
return NULL;
}
/* This can be called from any context since it saves CPU flags */
static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc,
struct mpoa_client *mpc)
{
unsigned long flags;
eg_cache_entry *entry;
read_lock_irqsave(&mpc->egress_lock, flags);
entry = mpc->eg_cache;
while (entry != NULL) {
if (entry->shortcut == vcc) {
refcount_inc(&entry->use);
read_unlock_irqrestore(&mpc->egress_lock, flags);
return entry;
}
entry = entry->next;
}
read_unlock_irqrestore(&mpc->egress_lock, flags);
return NULL;
}
int hns_roce_db_map_user(struct hns_roce_ucontext *context, unsigned long virt,
struct hns_roce_db *db)
{
struct hns_roce_user_db_page *page;
int ret = 0;
mutex_lock(&context->page_mutex);
list_for_each_entry(page, &context->page_list, list)
if (page->user_virt == (virt & PAGE_MASK))
goto found;
page = kmalloc(sizeof(*page), GFP_KERNEL);
if (!page) {
ret = -ENOMEM;
goto out;
}
refcount_set(&page->refcount, 1);
page->user_virt = (virt & PAGE_MASK);
page->umem = ib_umem_get(&context->ibucontext, virt & PAGE_MASK,
PAGE_SIZE, 0, 0);
if (IS_ERR(page->umem)) {
ret = PTR_ERR(page->umem);
kfree(page);
goto out;
}
list_add(&page->list, &context->page_list);
found:
db->dma = sg_dma_address(page->umem->sg_head.sgl) +
(virt & ~PAGE_MASK);
db->u.user_page = page;
refcount_inc(&page->refcount);
out:
mutex_unlock(&context->page_mutex);
return ret;
}
/**
* vfs_dup_fc_config: Duplicate a filesystem context.
* @src_fc: The context to copy.
*/
struct fs_context *vfs_dup_fs_context(struct fs_context *src_fc)
{
struct fs_context *fc;
int ret;
if (!src_fc->ops->dup)
return ERR_PTR(-EOPNOTSUPP);
fc = kmemdup(src_fc, sizeof(struct fs_context), GFP_KERNEL);
if (!fc)
return ERR_PTR(-ENOMEM);
mutex_init(&fc->uapi_mutex);
fc->fs_private = NULL;
fc->s_fs_info = NULL;
fc->source = NULL;
fc->security = NULL;
get_filesystem(fc->fs_type);
get_net(fc->net_ns);
get_user_ns(fc->user_ns);
get_cred(fc->cred);
if (fc->log)
refcount_inc(&fc->log->usage);
/* Can't call put until we've called ->dup */
ret = fc->ops->dup(fc, src_fc);
if (ret < 0)
goto err_fc;
ret = security_fs_context_dup(fc, src_fc);
if (ret < 0)
goto err_fc;
return fc;
err_fc:
put_fs_context(fc);
return ERR_PTR(ret);
}
static eg_cache_entry *eg_cache_add_entry(struct k_message *msg,
struct mpoa_client *client)
{
eg_cache_entry *entry = kzalloc(sizeof(eg_cache_entry), GFP_KERNEL);
if (entry == NULL) {
pr_info("out of memory\n");
return NULL;
}
dprintk("adding an egress entry, ip = %pI4, this should be our IP\n",
&msg->content.eg_info.eg_dst_ip);
refcount_set(&entry->use, 1);
dprintk("new_eg_cache_entry: about to lock\n");
write_lock_irq(&client->egress_lock);
entry->next = client->eg_cache;
entry->prev = NULL;
if (client->eg_cache != NULL)
client->eg_cache->prev = entry;
client->eg_cache = entry;
memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
entry->ctrl_info = msg->content.eg_info;
do_gettimeofday(&(entry->tv));
entry->entry_state = EGRESS_RESOLVED;
dprintk("new_eg_cache_entry cache_id %u\n",
ntohl(entry->ctrl_info.cache_id));
dprintk("mps_ip = %pI4\n", &entry->ctrl_info.mps_ip);
refcount_inc(&entry->use);
write_unlock_irq(&client->egress_lock);
dprintk("new_eg_cache_entry: unlocked\n");
return entry;
}
/** Open a handle to a semaphore.
* @param id ID of the semaphore to open.
* @param rights Access rights for the handle.
* @param handlep Where to store handle to semaphore.
* @return Status code describing result of the operation. */
status_t kern_semaphore_open(semaphore_id_t id, object_rights_t rights, handle_t *handlep) {
user_semaphore_t *sem;
status_t ret;
if(!handlep)
return STATUS_INVALID_ARG;
rwlock_read_lock(&semaphore_tree_lock);
sem = avl_tree_lookup(&semaphore_tree, id);
if(!sem) {
rwlock_unlock(&semaphore_tree_lock);
return STATUS_NOT_FOUND;
}
refcount_inc(&sem->count);
rwlock_unlock(&semaphore_tree_lock);
ret = object_handle_open(&sem->obj, NULL, rights, NULL, 0, NULL, NULL, handlep);
if(ret != STATUS_SUCCESS)
user_semaphore_release(sem);
return ret;
}
/** Increase a session's reference count.
* @param session Session to reference. */
void session_get(session_t *session) {
refcount_inc(&session->count);
}
struct nsinfo *nsinfo__get(struct nsinfo *nsi)
{
if (nsi)
refcount_inc(&nsi->refcnt);
return nsi;
}
/*
* write to a file
*/
static int afs_store_data(struct address_space *mapping,
pgoff_t first, pgoff_t last,
unsigned offset, unsigned to)
{
struct afs_vnode *vnode = AFS_FS_I(mapping->host);
struct afs_fs_cursor fc;
struct afs_wb_key *wbk = NULL;
struct list_head *p;
int ret = -ENOKEY, ret2;
_enter("%s{%x:%u.%u},%lx,%lx,%x,%x",
vnode->volume->name,
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique,
first, last, offset, to);
spin_lock(&vnode->wb_lock);
p = vnode->wb_keys.next;
/* Iterate through the list looking for a valid key to use. */
try_next_key:
while (p != &vnode->wb_keys) {
wbk = list_entry(p, struct afs_wb_key, vnode_link);
_debug("wbk %u", key_serial(wbk->key));
ret2 = key_validate(wbk->key);
if (ret2 == 0)
goto found_key;
if (ret == -ENOKEY)
ret = ret2;
p = p->next;
}
spin_unlock(&vnode->wb_lock);
afs_put_wb_key(wbk);
_leave(" = %d [no keys]", ret);
return ret;
found_key:
refcount_inc(&wbk->usage);
spin_unlock(&vnode->wb_lock);
_debug("USE WB KEY %u", key_serial(wbk->key));
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, vnode, wbk->key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(vnode);
afs_fs_store_data(&fc, mapping, first, last, offset, to);
}
afs_check_for_remote_deletion(&fc, fc.vnode);
afs_vnode_commit_status(&fc, vnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
}
switch (ret) {
case 0:
afs_stat_v(vnode, n_stores);
atomic_long_add((last * PAGE_SIZE + to) -
(first * PAGE_SIZE + offset),
&afs_v2net(vnode)->n_store_bytes);
break;
case -EACCES:
case -EPERM:
case -ENOKEY:
case -EKEYEXPIRED:
case -EKEYREJECTED:
case -EKEYREVOKED:
_debug("next");
spin_lock(&vnode->wb_lock);
p = wbk->vnode_link.next;
afs_put_wb_key(wbk);
goto try_next_key;
}
afs_put_wb_key(wbk);
_leave(" = %d", ret);
return ret;
}
static struct rpc_auth *
nul_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
{
refcount_inc(&null_auth.au_count);
return &null_auth;
}
/* Find the correct entry in the "incomplete datagrams" queue for
* this IP datagram, and create new one, if nothing is found.
*/
static struct ipq *ip_find(struct net *net, struct iphdr *iph,
u32 user, int vif)
{
struct frag_v4_compare_key key = {
.saddr = iph->saddr,
.daddr = iph->daddr,
.user = user,
.vif = vif,
.id = iph->id,
.protocol = iph->protocol,
};
struct inet_frag_queue *q;
q = inet_frag_find(&net->ipv4.frags, &key);
if (!q)
return NULL;
return container_of(q, struct ipq, q);
}
/* Is the fragment too far ahead to be part of ipq? */
static int ip_frag_too_far(struct ipq *qp)
{
struct inet_peer *peer = qp->peer;
unsigned int max = qp->q.net->max_dist;
unsigned int start, end;
int rc;
if (!peer || !max)
return 0;
start = qp->rid;
end = atomic_inc_return(&peer->rid);
qp->rid = end;
rc = qp->q.fragments_tail && (end - start) > max;
if (rc) {
struct net *net;
net = container_of(qp->q.net, struct net, ipv4.frags);
__IP_INC_STATS(net, IPSTATS_MIB_REASMFAILS);
}
return rc;
}
static int ip_frag_reinit(struct ipq *qp)
{
unsigned int sum_truesize = 0;
if (!mod_timer(&qp->q.timer, jiffies + qp->q.net->timeout)) {
refcount_inc(&qp->q.refcnt);
return -ETIMEDOUT;
}
sum_truesize = inet_frag_rbtree_purge(&qp->q.rb_fragments);
sub_frag_mem_limit(qp->q.net, sum_truesize);
qp->q.flags = 0;
qp->q.len = 0;
qp->q.meat = 0;
qp->q.fragments = NULL;
qp->q.rb_fragments = RB_ROOT;
qp->q.fragments_tail = NULL;
qp->q.last_run_head = NULL;
qp->iif = 0;
qp->ecn = 0;
return 0;
}
static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
{
struct request_sock *req;
struct dccp_request_sock *dreq;
struct inet_request_sock *ireq;
struct ipv6_pinfo *np = inet6_sk(sk);
const __be32 service = dccp_hdr_request(skb)->dccph_req_service;
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
if (skb->protocol == htons(ETH_P_IP))
return dccp_v4_conn_request(sk, skb);
if (!ipv6_unicast_destination(skb))
return 0; /* discard, don't send a reset here */
if (dccp_bad_service_code(sk, service)) {
dcb->dccpd_reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
goto drop;
}
/*
* There are no SYN attacks on IPv6, yet...
*/
dcb->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY;
if (inet_csk_reqsk_queue_is_full(sk))
goto drop;
if (sk_acceptq_is_full(sk))
goto drop;
req = inet_reqsk_alloc(&dccp6_request_sock_ops, sk, true);
if (req == NULL)
goto drop;
if (dccp_reqsk_init(req, dccp_sk(sk), skb))
goto drop_and_free;
dreq = dccp_rsk(req);
if (dccp_parse_options(sk, dreq, skb))
goto drop_and_free;
if (security_inet_conn_request(sk, skb, req))
goto drop_and_free;
ireq = inet_rsk(req);
ireq->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;
ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
ireq->ireq_family = AF_INET6;
ireq->ir_mark = inet_request_mark(sk, skb);
if (ipv6_opt_accepted(sk, skb, IP6CB(skb)) ||
np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
refcount_inc(&skb->users);
ireq->pktopts = skb;
}
ireq->ir_iif = sk->sk_bound_dev_if;
/* So that link locals have meaning */
if (!sk->sk_bound_dev_if &&
ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
ireq->ir_iif = inet6_iif(skb);
/*
* Step 3: Process LISTEN state
*
* Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
*
* Setting S.SWL/S.SWH to is deferred to dccp_create_openreq_child().
*/
dreq->dreq_isr = dcb->dccpd_seq;
dreq->dreq_gsr = dreq->dreq_isr;
dreq->dreq_iss = dccp_v6_init_sequence(skb);
dreq->dreq_gss = dreq->dreq_iss;
dreq->dreq_service = service;
if (dccp_v6_send_response(sk, req))
goto drop_and_free;
inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
reqsk_put(req);
return 0;
drop_and_free:
reqsk_free(req);
drop:
__DCCP_INC_STATS(DCCP_MIB_ATTEMPTFAILS);
return -1;
}
void perf_mmap__get(struct perf_mmap *map)
{
refcount_inc(&map->refcnt);
}
static struct rpc_auth *
unx_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
{
refcount_inc(&unix_auth.au_count);
return &unix_auth;
}
static inline void
instance_get(struct nfulnl_instance *inst)
{
refcount_inc(&inst->use);
}
static void aca_get(struct ifacaddr6 *aca)
{
refcount_inc(&aca->aca_refcnt);
}
