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SUNRPC: rework cache upcall logic

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For most of SUNRPC caches (except NFS DNS cache) cache_detail->cache_upcall is
redundant since all that it's implementations are doing is calling
sunrpc_cache_pipe_upcall() with proper function address argument.
Cache request function address is now stored on cache_detail structure and
thus all the code can be simplified.
Now, for those cache details, which doesn't have cache_upcall callback (the
only one, which still has is nfs_dns_resolve_template)
sunrpc_cache_pipe_upcall will be called instead.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky
2013-02-04 14:02:50 +03:00
committed by J. Bruce Fields
parent 73fb847a44
commit 2d4383383b
5 changed files with 7 additions and 49 deletions
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11
net/sunrpc/cache.c
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@@ -196,9 +196,9 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_update);
static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h)
{
if (!cd->cache_upcall)
return -EINVAL;
return cd->cache_upcall(cd, h);
if (cd->cache_upcall)
return cd->cache_upcall(cd, h);
return sunrpc_cache_pipe_upcall(cd, h, cd->cache_request);
}
static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h)
@@ -1152,6 +1152,9 @@ int sunrpc_cache_pipe_upcall(struct cache_detail *detail, struct cache_head *h,
char *bp;
int len;
if (!detail->cache_request)
return -EINVAL;
if (!cache_listeners_exist(detail)) {
warn_no_listener(detail);
return -EINVAL;
@@ -1605,7 +1608,7 @@ static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
if (p == NULL)
goto out_nomem;
if (cd->cache_upcall || cd->cache_parse) {
if (cd->cache_request || cd->cache_parse) {
p = proc_create_data("channel", S_IFREG|S_IRUSR|S_IWUSR,
cd->u.procfs.proc_ent,
&cache_file_operations_procfs, cd);