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Date: Mon, 12 Nov 2007 11:38:24 -0500
From: Vlad Yasevich <vladislav.yasevich@...com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, lksctp-developers@...ts.sourceforge.net,
Vlad Yasevich <vladislav.yasevich@...com>
Subject: [PATCH 09/14] SCTP: Convert custom hash lists to use hlist.
Convert the custom hash list traversals to use hlist functions.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@...com>
---
include/net/sctp/sctp.h | 3 +++
include/net/sctp/structs.h | 10 ++++------
net/sctp/endpointola.c | 3 ++-
net/sctp/input.c | 43 +++++++++++--------------------------------
net/sctp/proc.c | 6 ++++--
net/sctp/protocol.c | 6 +++---
net/sctp/socket.c | 14 +++++---------
7 files changed, 32 insertions(+), 53 deletions(-)
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 7082730..67c997c 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -665,6 +665,9 @@ static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
return (h & (sctp_assoc_hashsize-1));
}
+#define sctp_for_each_hentry(epb, node, head) \
+ hlist_for_each_entry(epb, node, head, node)
+
/* Is a socket of this style? */
#define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style)
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 44f2672..eb3113c 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -100,20 +100,19 @@ struct crypto_hash;
struct sctp_bind_bucket {
unsigned short port;
unsigned short fastreuse;
- struct sctp_bind_bucket *next;
- struct sctp_bind_bucket **pprev;
+ struct hlist_node node;
struct hlist_head owner;
};
struct sctp_bind_hashbucket {
spinlock_t lock;
- struct sctp_bind_bucket *chain;
+ struct hlist_head chain;
};
/* Used for hashing all associations. */
struct sctp_hashbucket {
rwlock_t lock;
- struct sctp_ep_common *chain;
+ struct hlist_head chain;
} __attribute__((__aligned__(8)));
@@ -1230,8 +1229,7 @@ typedef enum {
struct sctp_ep_common {
/* Fields to help us manage our entries in the hash tables. */
- struct sctp_ep_common *next;
- struct sctp_ep_common **pprev;
+ struct hlist_node node;
int hashent;
/* Runtime type information. What kind of endpoint is this? */
diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 68f0556..de6f505 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -332,6 +332,7 @@ static struct sctp_association *__sctp_endpoint_lookup_assoc(
struct sctp_transport *t = NULL;
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
+ struct hlist_node *node;
int hash;
int rport;
@@ -341,7 +342,7 @@ static struct sctp_association *__sctp_endpoint_lookup_assoc(
hash = sctp_assoc_hashfn(ep->base.bind_addr.port, rport);
head = &sctp_assoc_hashtable[hash];
read_lock(&head->lock);
- for (epb = head->chain; epb; epb = epb->next) {
+ sctp_for_each_hentry(epb, node, &head->chain) {
asoc = sctp_assoc(epb);
if (asoc->ep != ep || rport != asoc->peer.port)
goto next;
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 86503e7..91ae463 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -656,7 +656,6 @@ discard:
/* Insert endpoint into the hash table. */
static void __sctp_hash_endpoint(struct sctp_endpoint *ep)
{
- struct sctp_ep_common **epp;
struct sctp_ep_common *epb;
struct sctp_hashbucket *head;
@@ -666,12 +665,7 @@ static void __sctp_hash_endpoint(struct sctp_endpoint *ep)
head = &sctp_ep_hashtable[epb->hashent];
sctp_write_lock(&head->lock);
- epp = &head->chain;
- epb->next = *epp;
- if (epb->next)
- (*epp)->pprev = &epb->next;
- *epp = epb;
- epb->pprev = epp;
+ hlist_add_head(&epb->node, &head->chain);
sctp_write_unlock(&head->lock);
}
@@ -691,19 +685,15 @@ static void __sctp_unhash_endpoint(struct sctp_endpoint *ep)
epb = &ep->base;
+ if (hlist_unhashed(&epb->node))
+ return;
+
epb->hashent = sctp_ep_hashfn(epb->bind_addr.port);
head = &sctp_ep_hashtable[epb->hashent];
sctp_write_lock(&head->lock);
-
- if (epb->pprev) {
- if (epb->next)
- epb->next->pprev = epb->pprev;
- *epb->pprev = epb->next;
- epb->pprev = NULL;
- }
-
+ __hlist_del(&epb->node);
sctp_write_unlock(&head->lock);
}
@@ -721,12 +711,13 @@ static struct sctp_endpoint *__sctp_rcv_lookup_endpoint(const union sctp_addr *l
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
struct sctp_endpoint *ep;
+ struct hlist_node *node;
int hash;
hash = sctp_ep_hashfn(ntohs(laddr->v4.sin_port));
head = &sctp_ep_hashtable[hash];
read_lock(&head->lock);
- for (epb = head->chain; epb; epb = epb->next) {
+ sctp_for_each_hentry(epb, node, &head->chain) {
ep = sctp_ep(epb);
if (sctp_endpoint_is_match(ep, laddr))
goto hit;
@@ -744,7 +735,6 @@ hit:
/* Insert association into the hash table. */
static void __sctp_hash_established(struct sctp_association *asoc)
{
- struct sctp_ep_common **epp;
struct sctp_ep_common *epb;
struct sctp_hashbucket *head;
@@ -756,12 +746,7 @@ static void __sctp_hash_established(struct sctp_association *asoc)
head = &sctp_assoc_hashtable[epb->hashent];
sctp_write_lock(&head->lock);
- epp = &head->chain;
- epb->next = *epp;
- if (epb->next)
- (*epp)->pprev = &epb->next;
- *epp = epb;
- epb->pprev = epp;
+ hlist_add_head(&epb->node, &head->chain);
sctp_write_unlock(&head->lock);
}
@@ -790,14 +775,7 @@ static void __sctp_unhash_established(struct sctp_association *asoc)
head = &sctp_assoc_hashtable[epb->hashent];
sctp_write_lock(&head->lock);
-
- if (epb->pprev) {
- if (epb->next)
- epb->next->pprev = epb->pprev;
- *epb->pprev = epb->next;
- epb->pprev = NULL;
- }
-
+ __hlist_del(&epb->node);
sctp_write_unlock(&head->lock);
}
@@ -822,6 +800,7 @@ static struct sctp_association *__sctp_lookup_association(
struct sctp_ep_common *epb;
struct sctp_association *asoc;
struct sctp_transport *transport;
+ struct hlist_node *node;
int hash;
/* Optimize here for direct hit, only listening connections can
@@ -830,7 +809,7 @@ static struct sctp_association *__sctp_lookup_association(
hash = sctp_assoc_hashfn(ntohs(local->v4.sin_port), ntohs(peer->v4.sin_port));
head = &sctp_assoc_hashtable[hash];
read_lock(&head->lock);
- for (epb = head->chain; epb; epb = epb->next) {
+ sctp_for_each_hentry(epb, node, &head->chain) {
asoc = sctp_assoc(epb);
transport = sctp_assoc_is_match(asoc, local, peer);
if (transport)
diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index e4cd841..2499732 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -225,6 +225,7 @@ static int sctp_eps_seq_show(struct seq_file *seq, void *v)
struct sctp_ep_common *epb;
struct sctp_endpoint *ep;
struct sock *sk;
+ struct hlist_node *node;
int hash = *(loff_t *)v;
if (hash >= sctp_ep_hashsize)
@@ -233,7 +234,7 @@ static int sctp_eps_seq_show(struct seq_file *seq, void *v)
head = &sctp_ep_hashtable[hash];
sctp_local_bh_disable();
read_lock(&head->lock);
- for (epb = head->chain; epb; epb = epb->next) {
+ sctp_for_each_hentry(epb, node, &head->chain) {
ep = sctp_ep(epb);
sk = epb->sk;
seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
@@ -328,6 +329,7 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
struct sctp_ep_common *epb;
struct sctp_association *assoc;
struct sock *sk;
+ struct hlist_node *node;
int hash = *(loff_t *)v;
if (hash >= sctp_assoc_hashsize)
@@ -336,7 +338,7 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
head = &sctp_assoc_hashtable[hash];
sctp_local_bh_disable();
read_lock(&head->lock);
- for (epb = head->chain; epb; epb = epb->next) {
+ sctp_for_each_hentry(epb, node, &head->chain) {
assoc = sctp_assoc(epb);
sk = epb->sk;
seq_printf(seq,
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index ecfab03..d50f610 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1137,7 +1137,7 @@ SCTP_STATIC __init int sctp_init(void)
}
for (i = 0; i < sctp_assoc_hashsize; i++) {
rwlock_init(&sctp_assoc_hashtable[i].lock);
- sctp_assoc_hashtable[i].chain = NULL;
+ INIT_HLIST_HEAD(&sctp_assoc_hashtable[i].chain);
}
/* Allocate and initialize the endpoint hash table. */
@@ -1151,7 +1151,7 @@ SCTP_STATIC __init int sctp_init(void)
}
for (i = 0; i < sctp_ep_hashsize; i++) {
rwlock_init(&sctp_ep_hashtable[i].lock);
- sctp_ep_hashtable[i].chain = NULL;
+ INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain);
}
/* Allocate and initialize the SCTP port hash table. */
@@ -1170,7 +1170,7 @@ SCTP_STATIC __init int sctp_init(void)
}
for (i = 0; i < sctp_port_hashsize; i++) {
spin_lock_init(&sctp_port_hashtable[i].lock);
- sctp_port_hashtable[i].chain = NULL;
+ INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain);
}
printk(KERN_INFO "SCTP: Hash tables configured "
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 6ce9b49..ff8bc95 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -5307,6 +5307,7 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
{
struct sctp_bind_hashbucket *head; /* hash list */
struct sctp_bind_bucket *pp; /* hash list port iterator */
+ struct hlist_node *node;
unsigned short snum;
int ret;
@@ -5331,7 +5332,7 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
index = sctp_phashfn(rover);
head = &sctp_port_hashtable[index];
sctp_spin_lock(&head->lock);
- for (pp = head->chain; pp; pp = pp->next)
+ sctp_for_each_hentry(pp, node, &head->chain)
if (pp->port == rover)
goto next;
break;
@@ -5358,7 +5359,7 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
*/
head = &sctp_port_hashtable[sctp_phashfn(snum)];
sctp_spin_lock(&head->lock);
- for (pp = head->chain; pp; pp = pp->next) {
+ sctp_for_each_hentry(pp, node, &head->chain) {
if (pp->port == snum)
goto pp_found;
}
@@ -5702,10 +5703,7 @@ static struct sctp_bind_bucket *sctp_bucket_create(
pp->port = snum;
pp->fastreuse = 0;
INIT_HLIST_HEAD(&pp->owner);
- if ((pp->next = head->chain) != NULL)
- pp->next->pprev = &pp->next;
- head->chain = pp;
- pp->pprev = &head->chain;
+ hlist_add_head(&pp->node, &head->chain);
}
return pp;
}
@@ -5714,9 +5712,7 @@ static struct sctp_bind_bucket *sctp_bucket_create(
static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
{
if (pp && hlist_empty(&pp->owner)) {
- if (pp->next)
- pp->next->pprev = pp->pprev;
- *(pp->pprev) = pp->next;
+ __hlist_del(&pp->node);
kmem_cache_free(sctp_bucket_cachep, pp);
SCTP_DBG_OBJCNT_DEC(bind_bucket);
}
--
1.5.2.4
-
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