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fcst: Introduce function ft_sess_hash()

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4862 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2013-05-19 16:53:24 +00:00
parent 55084ba194
commit f5fd68200e
1 changed files with 11 additions and 3 deletions
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14
fcst/ft_sess.c
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@@ -165,6 +165,14 @@ int ft_lport_notify(struct notifier_block *nb, unsigned long event, void *arg)
return NOTIFY_DONE;
}
/*
* Hash function for FC_IDs.
*/
static u32 ft_sess_hash(u32 port_id)
{
return hash_32(port_id, FT_SESS_HASH_BITS);
}
/*
* Find session in local port.
* Sessions and hash lists are RCU-protected.
@@ -182,7 +190,7 @@ static struct ft_sess *ft_sess_get(struct fc_lport *lport, u32 port_id)
if (!tport)
goto out;
head = &tport->hash[hash_32(port_id, FT_SESS_HASH_BITS)];
head = &tport->hash[ft_sess_hash(port_id)];
hlist_for_each_entry_rcu(sess, pos, head, hash) {
if (sess->port_id == port_id) {
kref_get(&sess->kref);
@@ -217,7 +225,7 @@ static int ft_sess_create(struct ft_tport *tport, struct fc_rport_priv *rdata,
return FC_SPP_RESP_CONF;
}
head = &tport->hash[hash_32(port_id, FT_SESS_HASH_BITS)];
head = &tport->hash[ft_sess_hash(port_id)];
hlist_for_each_entry_rcu(sess, pos, head, hash) {
if (sess->port_id == port_id) {
sess->params = fcp_parm;
@@ -282,7 +290,7 @@ static struct ft_sess *ft_sess_delete(struct ft_tport *tport, u32 port_id)
struct hlist_node *pos;
struct ft_sess *sess;
head = &tport->hash[hash_32(port_id, FT_SESS_HASH_BITS)];
head = &tport->hash[ft_sess_hash(port_id)];
hlist_for_each_entry_rcu(sess, pos, head, hash) {
if (sess->port_id == port_id) {
ft_sess_unhash(sess);