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sunrpc: Add routines that allow registering per-net caches 

Existing calls do the same, but for the init_net.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Pavel Emelyanov 2010-09-27 14:00:15 +04:00 committed by J. Bruce Fields
parent 352114f395
commit 593ce16b94
2 changed files with 21 additions and 8 deletions
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2
include/linux/sunrpc/cache.h
View File

@ -197,7 +197,9 @@ extern void cache_purge(struct cache_detail *detail);
#define NEVER (0x7FFFFFFF) #define NEVER (0x7FFFFFFF)
extern void __init cache_initialize(void); extern void __init cache_initialize(void);
extern int cache_register(struct cache_detail *cd); extern int cache_register(struct cache_detail *cd);
extern int cache_register_net(struct cache_detail *cd, struct net *net);
extern void cache_unregister(struct cache_detail *cd); extern void cache_unregister(struct cache_detail *cd);
extern void cache_unregister_net(struct cache_detail *cd, struct net *net);
extern int sunrpc_cache_register_pipefs(struct dentry *parent, const char *, extern int sunrpc_cache_register_pipefs(struct dentry *parent, const char *,
mode_t, struct cache_detail *); mode_t, struct cache_detail *);

27
net/sunrpc/cache.c
View File

@ -34,6 +34,7 @@
#include <linux/sunrpc/cache.h> #include <linux/sunrpc/cache.h>
#include <linux/sunrpc/stats.h> #include <linux/sunrpc/stats.h>
#include <linux/sunrpc/rpc_pipe_fs.h> #include <linux/sunrpc/rpc_pipe_fs.h>
#include <net/net_namespace.h>
#define RPCDBG_FACILITY RPCDBG_CACHE #define RPCDBG_FACILITY RPCDBG_CACHE
@ -1537,7 +1538,7 @@ static const struct file_operations cache_flush_operations_procfs = {
.release = release_flush_procfs, .release = release_flush_procfs,
}; };
static void remove_cache_proc_entries(struct cache_detail *cd) static void remove_cache_proc_entries(struct cache_detail *cd, struct net *net)
{ {
if (cd->u.procfs.proc_ent == NULL) if (cd->u.procfs.proc_ent == NULL)
return; return;
@ -1552,7 +1553,7 @@ static void remove_cache_proc_entries(struct cache_detail *cd)
} }
#ifdef CONFIG_PROC_FS #ifdef CONFIG_PROC_FS
static int create_cache_proc_entries(struct cache_detail *cd) static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
{ {
struct proc_dir_entry *p; struct proc_dir_entry *p;
@ -1587,11 +1588,11 @@ static int create_cache_proc_entries(struct cache_detail *cd)
} }
return 0; return 0;
out_nomem: out_nomem:
remove_cache_proc_entries(cd); remove_cache_proc_entries(cd, net);
return -ENOMEM; return -ENOMEM;
} }
#else /* CONFIG_PROC_FS */ #else /* CONFIG_PROC_FS */
static int create_cache_proc_entries(struct cache_detail *cd) static int create_cache_proc_entries(struct cache_detail *cd, struct net *net)
{ {
return 0; return 0;
} }
@ -1602,22 +1603,32 @@ void __init cache_initialize(void)
INIT_DELAYED_WORK_DEFERRABLE(&cache_cleaner, do_cache_clean); INIT_DELAYED_WORK_DEFERRABLE(&cache_cleaner, do_cache_clean);
} }
int cache_register(struct cache_detail *cd) int cache_register_net(struct cache_detail *cd, struct net *net)
{ {
int ret; int ret;
sunrpc_init_cache_detail(cd); sunrpc_init_cache_detail(cd);
ret = create_cache_proc_entries(cd); ret = create_cache_proc_entries(cd, net);
if (ret) if (ret)
sunrpc_destroy_cache_detail(cd); sunrpc_destroy_cache_detail(cd);
return ret; return ret;
} }
int cache_register(struct cache_detail *cd)
{
return cache_register_net(cd, &init_net);
}
EXPORT_SYMBOL_GPL(cache_register); EXPORT_SYMBOL_GPL(cache_register);
void cache_unregister_net(struct cache_detail *cd, struct net *net)
{
remove_cache_proc_entries(cd, net);
sunrpc_destroy_cache_detail(cd);
}
void cache_unregister(struct cache_detail *cd) void cache_unregister(struct cache_detail *cd)
{ {
remove_cache_proc_entries(cd); cache_unregister_net(cd, &init_net);
sunrpc_destroy_cache_detail(cd);
} }
EXPORT_SYMBOL_GPL(cache_unregister); EXPORT_SYMBOL_GPL(cache_unregister);