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urr.c
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urr.c
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#include <linux/rculist.h>
#include "dev.h"
#include "urr.h"
#include "pdr.h"
#include "seid.h"
#include "hash.h"
static void seid_urr_id_to_hex_str(u64 seid_int, u32 urr_id, char *buff)
{
seid_and_u32id_to_hex_str(seid_int, urr_id, buff);
}
static void urr_context_free(struct rcu_head *head)
{
struct urr *urr = container_of(head, struct urr, rcu_head);
if (!urr)
return;
kfree(urr);
}
void urr_context_delete(struct urr *urr)
{
struct gtp5g_dev *gtp = netdev_priv(urr->dev);
struct hlist_head *head;
struct pdr *pdr;
char seid_urr_id_hexstr[SEID_U32ID_HEX_STR_LEN] = {0};
if (!urr)
return;
if (!hlist_unhashed(&urr->hlist_id))
hlist_del_rcu(&urr->hlist_id);
seid_urr_id_to_hex_str(urr->seid, urr->id, seid_urr_id_hexstr);
head = >p->related_urr_hash[str_hashfn(seid_urr_id_hexstr) % gtp->hash_size];
hlist_for_each_entry_rcu(pdr, head, hlist_related_urr) {
if (*pdr->urr_id == urr->id) {
pdr->urr = NULL;
unix_sock_client_delete(pdr);
}
}
call_rcu(&urr->rcu_head, urr_context_free);
}
struct urr *find_urr_by_id(struct gtp5g_dev *gtp, u64 seid, u32 urr_id)
{
struct hlist_head *head;
struct urr *urr;
char seid_urr_id_hexstr[SEID_U32ID_HEX_STR_LEN] = {0};
seid_urr_id_to_hex_str(seid, urr_id, seid_urr_id_hexstr);
head = >p->urr_id_hash[str_hashfn(seid_urr_id_hexstr) % gtp->hash_size];
hlist_for_each_entry_rcu(urr, head, hlist_id) {
if (urr->seid == seid && urr->id == urr_id)
return urr;
}
return NULL;
}
void urr_update(struct urr *urr, struct gtp5g_dev *gtp)
{
struct pdr *pdr;
struct hlist_head *head;
char seid_urr_id_hexstr[SEID_U32ID_HEX_STR_LEN] = {0};
seid_urr_id_to_hex_str(urr->seid, urr->id, seid_urr_id_hexstr);
head = >p->related_urr_hash[str_hashfn(seid_urr_id_hexstr) % gtp->hash_size];
hlist_for_each_entry_rcu(pdr, head, hlist_related_urr) {
if (*pdr->urr_id == urr->id) {
pdr->urr = urr;
// Problem?
unix_sock_client_update(pdr, true);
}
}
}
void urr_append(u64 seid, u32 urr_id, struct urr *urr, struct gtp5g_dev *gtp)
{
char seid_urr_id_hexstr[SEID_U32ID_HEX_STR_LEN] = {0};
u32 i;
seid_urr_id_to_hex_str(seid, urr_id, seid_urr_id_hexstr);
i = str_hashfn(seid_urr_id_hexstr) % gtp->hash_size;
hlist_add_head_rcu(&urr->hlist_id, >p->urr_id_hash[i]);
}
int urr_get_pdr_ids(u16 *ids, int n, struct urr *urr, struct gtp5g_dev *gtp)
{
struct hlist_head *head;
struct pdr *pdr;
char seid_urr_id_hexstr[SEID_U32ID_HEX_STR_LEN] = {0};
int i;
seid_urr_id_to_hex_str(urr->seid, urr->id, seid_urr_id_hexstr);
head = >p->related_urr_hash[str_hashfn(seid_urr_id_hexstr) % gtp->hash_size];
i = 0;
hlist_for_each_entry_rcu(pdr, head, hlist_related_urr) {
if (i >= n)
break;
if (*pdr->urr_id == urr->id)
ids[i++] = pdr->id;
}
return i;
}
void urr_set_pdr(u64 seid, u32 urr_id, struct hlist_node *node, struct gtp5g_dev *gtp)
{
char seid_urr_id_hexstr[SEID_U32ID_HEX_STR_LEN] = {0};
u32 i;
if (!hlist_unhashed(node))
hlist_del_rcu(node);
seid_urr_id_to_hex_str(seid, urr_id, seid_urr_id_hexstr);
i = str_hashfn(seid_urr_id_hexstr) % gtp->hash_size;
hlist_add_head_rcu(node, >p->related_urr_hash[i]);
}