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SUNRPC: cache creation and destruction routines introduced

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This patch prepares infrastructure for network namespace aware cache detail
allocation.
One note about adding network namespace link to cache structure. It's going to
be used later in NFS DNS cache parsing routine (nfs_dns_parse for rpc_pton()
call).

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky
2012-01-19 21:42:21 +04:00
committed by Trond Myklebust
parent 5ecebb7c7f
commit 0a402d5a65
2 changed files with 30 additions and 0 deletions
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26
net/sunrpc/cache.c
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@@ -1664,6 +1664,32 @@ void cache_unregister(struct cache_detail *cd)
}
EXPORT_SYMBOL_GPL(cache_unregister);
struct cache_detail *cache_create_net(struct cache_detail *tmpl, struct net *net)
{
struct cache_detail *cd;
cd = kmemdup(tmpl, sizeof(struct cache_detail), GFP_KERNEL);
if (cd == NULL)
return ERR_PTR(-ENOMEM);
cd->hash_table = kzalloc(cd->hash_size * sizeof(struct cache_head *),
GFP_KERNEL);
if (cd->hash_table == NULL) {
kfree(cd);
return ERR_PTR(-ENOMEM);
}
cd->net = net;
return cd;
}
EXPORT_SYMBOL_GPL(cache_create_net);
void cache_destroy_net(struct cache_detail *cd, struct net *net)
{
kfree(cd->hash_table);
kfree(cd);
}
EXPORT_SYMBOL_GPL(cache_destroy_net);
static ssize_t cache_read_pipefs(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{