Skip to content

Commit

Permalink
IPVS: Convert __ip_vs_svc_get() and __ip_vs_fwm_get()
Browse files Browse the repository at this point in the history 
Add support for getting services based on their address family to
__ip_vs_service_get(), __ip_vs_fwm_get() and the helper hash function
ip_vs_svc_hashkey(). Adjust the callers.

Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
  • Loading branch information
Julius Volz authored and Simon Horman committed Sep 5, 2008
1 parent c860c6b commit b18610d
Showing 1 changed file with 47 additions and 32 deletions.
79 changes: 47 additions & 32 deletions net/ipv4/ipvs/ip_vs_ctl.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -282,11 +282,19 @@ static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
* Returns hash value for virtual service
*/
static __inline__ unsigned
ip_vs_svc_hashkey(unsigned proto, __be32 addr, __be16 port)
ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr,
__be16 port)
{
register unsigned porth = ntohs(port);
__be32 addr_fold = addr->ip;

return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6)
addr_fold = addr->ip6[0]^addr->ip6[1]^
addr->ip6[2]^addr->ip6[3];
#endif

return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
& IP_VS_SVC_TAB_MASK;
}

Expand Down Expand Up @@ -317,7 +325,7 @@ static int ip_vs_svc_hash(struct ip_vs_service *svc)
/*
* Hash it by <protocol,addr,port> in ip_vs_svc_table
*/
hash = ip_vs_svc_hashkey(svc->protocol, svc->addr.ip,
hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr,
svc->port);
list_add(&svc->s_list, &ip_vs_svc_table[hash]);
} else {
Expand Down Expand Up @@ -364,17 +372,19 @@ static int ip_vs_svc_unhash(struct ip_vs_service *svc)
/*
* Get service by {proto,addr,port} in the service table.
*/
static __inline__ struct ip_vs_service *
__ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport)
static inline struct ip_vs_service *
__ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
__be16 vport)
{
unsigned hash;
struct ip_vs_service *svc;

/* Check for "full" addressed entries */
hash = ip_vs_svc_hashkey(protocol, vaddr, vport);
hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport);

list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
if ((svc->addr.ip == vaddr)
if ((svc->af == af)
&& ip_vs_addr_equal(af, &svc->addr, vaddr)
&& (svc->port == vport)
&& (svc->protocol == protocol)) {
/* HIT */
Expand All @@ -390,7 +400,8 @@ __ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport)
/*
* Get service by {fwmark} in the service table.
*/
static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark)
static inline struct ip_vs_service *
__ip_vs_svc_fwm_get(int af, __u32 fwmark)
{
unsigned hash;
struct ip_vs_service *svc;
Expand All @@ -399,7 +410,7 @@ static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark)
hash = ip_vs_svc_fwm_hashkey(fwmark);

list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
if (svc->fwmark == fwmark) {
if (svc->fwmark == fwmark && svc->af == af) {
/* HIT */
atomic_inc(&svc->usecnt);
return svc;
Expand All @@ -413,20 +424,20 @@ struct ip_vs_service *
ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport)
{
struct ip_vs_service *svc;

union nf_inet_addr _vaddr = { .ip = vaddr };
read_lock(&__ip_vs_svc_lock);

/*
* Check the table hashed by fwmark first
*/
if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark)))
if (fwmark && (svc = __ip_vs_svc_fwm_get(AF_INET, fwmark)))
goto out;

/*
* Check the table hashed by <protocol,addr,port>
* for "full" addressed entries
*/
svc = __ip_vs_service_get(protocol, vaddr, vport);
svc = __ip_vs_service_get(AF_INET, protocol, &_vaddr, vport);

if (svc == NULL
&& protocol == IPPROTO_TCP
Expand All @@ -436,15 +447,15 @@ ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport)
* Check if ftp service entry exists, the packet
* might belong to FTP data connections.
*/
svc = __ip_vs_service_get(protocol, vaddr, FTPPORT);
svc = __ip_vs_service_get(AF_INET, protocol, &_vaddr, FTPPORT);
}

if (svc == NULL
&& atomic_read(&ip_vs_nullsvc_counter)) {
/*
* Check if the catch-all port (port zero) exists
*/
svc = __ip_vs_service_get(protocol, vaddr, 0);
svc = __ip_vs_service_get(AF_INET, protocol, &_vaddr, 0);
}

out:
Expand Down Expand Up @@ -2016,10 +2027,10 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)

/* Lookup the exact service by <protocol, addr, port> or fwmark */
if (usvc.fwmark == 0)
svc = __ip_vs_service_get(usvc.protocol,
usvc.addr.ip, usvc.port);
svc = __ip_vs_service_get(usvc.af, usvc.protocol,
&usvc.addr, usvc.port);
else
svc = __ip_vs_svc_fwm_get(usvc.fwmark);
svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);

if (cmd != IP_VS_SO_SET_ADD
&& (svc == NULL || svc->protocol != usvc.protocol)) {
Expand Down Expand Up @@ -2141,13 +2152,15 @@ __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
struct ip_vs_get_dests __user *uptr)
{
struct ip_vs_service *svc;
union nf_inet_addr addr = { .ip = get->addr };
int ret = 0;

if (get->fwmark)
svc = __ip_vs_svc_fwm_get(get->fwmark);
svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
else
svc = __ip_vs_service_get(get->protocol,
get->addr, get->port);
svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
get->port);

if (svc) {
int count = 0;
struct ip_vs_dest *dest;
Expand Down Expand Up @@ -2282,13 +2295,15 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
{
struct ip_vs_service_entry *entry;
struct ip_vs_service *svc;
union nf_inet_addr addr;

entry = (struct ip_vs_service_entry *)arg;
addr.ip = entry->addr;
if (entry->fwmark)
svc = __ip_vs_svc_fwm_get(entry->fwmark);
svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
else
svc = __ip_vs_service_get(entry->protocol,
entry->addr, entry->port);
svc = __ip_vs_service_get(AF_INET, entry->protocol,
&addr, entry->port);
if (svc) {
ip_vs_copy_service(entry, svc);
if (copy_to_user(user, entry, sizeof(*entry)) != 0)
Expand Down Expand Up @@ -2613,10 +2628,10 @@ static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,

/* prefill flags from service if it already exists */
if (usvc->fwmark)
svc = __ip_vs_svc_fwm_get(usvc->fwmark);
svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
else
svc = __ip_vs_service_get(usvc->protocol, usvc->addr.ip,
usvc->port);
svc = __ip_vs_service_get(usvc->af, usvc->protocol,
&usvc->addr, usvc->port);
if (svc) {
usvc->flags = svc->flags;
ip_vs_service_put(svc);
Expand Down Expand Up @@ -2644,10 +2659,10 @@ static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
return ERR_PTR(ret);

if (usvc.fwmark)
return __ip_vs_svc_fwm_get(usvc.fwmark);
return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
else
return __ip_vs_service_get(usvc.protocol, usvc.addr.ip,
usvc.port);
return __ip_vs_service_get(usvc.af, usvc.protocol,
&usvc.addr, usvc.port);
}

static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
Expand Down Expand Up @@ -2955,10 +2970,10 @@ static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)

/* Lookup the exact service by <protocol, addr, port> or fwmark */
if (usvc.fwmark == 0)
svc = __ip_vs_service_get(usvc.protocol, usvc.addr.ip,
usvc.port);
svc = __ip_vs_service_get(usvc.af, usvc.protocol,
&usvc.addr, usvc.port);
else
svc = __ip_vs_svc_fwm_get(usvc.fwmark);
svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);

/* Unless we're adding a new service, the service must already exist */
if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
Expand Down

0 comments on commit b18610d

Please sign in to comment.