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NSM: Refactor nsm_handle creation into a helper function 

Clean up.  Refactor the creation of nsm_handles into a helper.  Fields
are initialized in increasing address order to make efficient use of
CPU caches.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2008-12-11 17:55:52 -05:00 committed by J. Bruce Fields
parent 92fd91b998
commit b39b897c25
1 changed files with 26 additions and 12 deletions
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38
fs/lockd/mon.c
View File

@ -239,6 +239,30 @@ static void nsm_init_private(struct nsm_handle *nsm)
*p = nsm_addr_in(nsm)->sin_addr.s_addr;
}
static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap,
const size_t salen,
const char *hostname,
const size_t hostname_len)
{
struct nsm_handle *new;
new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL);
if (unlikely(new == NULL))
return NULL;
atomic_set(&new->sm_count, 1);
new->sm_name = (char *)(new + 1);
memcpy(nsm_addr(new), sap, salen);
new->sm_addrlen = salen;
nsm_init_private(new);
nsm_display_address((const struct sockaddr *)&new->sm_addr,
new->sm_addrbuf, sizeof(new->sm_addrbuf));
memcpy(new->sm_name, hostname, hostname_len);
new->sm_name[hostname_len] = '\0';
return new;
}
/**
* nsm_get_handle - Find or create a cached nsm_handle
* @sap: pointer to socket address of handle to find
@ -295,19 +319,9 @@ retry:
}
spin_unlock(&nsm_lock);
nsm = kzalloc(sizeof(*nsm) + hostname_len + 1, GFP_KERNEL);
if (nsm == NULL)
nsm = nsm_create_handle(sap, salen, hostname, hostname_len);
if (unlikely(nsm == NULL))
return NULL;
memcpy(nsm_addr(nsm), sap, salen);
nsm->sm_addrlen = salen;
nsm->sm_name = (char *) (nsm + 1);
memcpy(nsm->sm_name, hostname, hostname_len);
nsm->sm_name[hostname_len] = '\0';
nsm_init_private(nsm);
nsm_display_address((struct sockaddr *)&nsm->sm_addr,
nsm->sm_addrbuf, sizeof(nsm->sm_addrbuf));
atomic_set(&nsm->sm_count, 1);
goto retry;
found: