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authorStanislav Kinsbursky <skinsbursky@parallels.com>2011-11-25 17:13:04 +0300
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-31 18:20:26 -0500
commit1b340d0118da1d7c60c664f17d7c8fce2bb1cd9d (patch)
treea66a9626f8fca21bd42d13a3b4270b168e2186fc /fs/nfs/inode.c
parent5c1cacb175185ed925d7dc13ac7e0653e7a633cd (diff)
downloadop-kernel-dev-1b340d0118da1d7c60c664f17d7c8fce2bb1cd9d.zip
op-kernel-dev-1b340d0118da1d7c60c664f17d7c8fce2bb1cd9d.tar.gz
NFS: DNS resolver cache per network namespace context introduced
This patch implements DNS resolver cache creation and registration for each alive network namespace context. This was done by registering NFS per-net operations, responsible for DNS cache allocation/register and unregister/destructioning instead of initialization and destruction of static "nfs_dns_resolve" cache detail (this one was removed). Pointer to network dns resolver cache is stored in new per-net "nfs_net" structure. This patch also changes nfs_dns_resolve_name() function prototype (and it's calls) by adding network pointer parameter, which is used to get proper DNS resolver cache pointer for do_cache_lookup_wait() call. Note: empty nfs_dns_resolver_init() and nfs_dns_resolver_destroy() functions will be used in next patch in the series. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/inode.c')
-rw-r--r--fs/nfs/inode.c33
1 files changed, 30 insertions, 3 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index f649fba..0335f6e 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -51,6 +51,7 @@
#include "fscache.h"
#include "dns_resolve.h"
#include "pnfs.h"
+#include "netns.h"
#define NFSDBG_FACILITY NFSDBG_VFS
@@ -1552,6 +1553,25 @@ static void nfsiod_stop(void)
destroy_workqueue(wq);
}
+int nfs_net_id;
+
+static int nfs_net_init(struct net *net)
+{
+ return nfs_dns_resolver_cache_init(net);
+}
+
+static void nfs_net_exit(struct net *net)
+{
+ nfs_dns_resolver_cache_destroy(net);
+}
+
+static struct pernet_operations nfs_net_ops = {
+ .init = nfs_net_init,
+ .exit = nfs_net_exit,
+ .id = &nfs_net_id,
+ .size = sizeof(struct nfs_net),
+};
+
/*
* Initialize NFS
*/
@@ -1561,10 +1581,14 @@ static int __init init_nfs_fs(void)
err = nfs_idmap_init();
if (err < 0)
- goto out9;
+ goto out10;
err = nfs_dns_resolver_init();
if (err < 0)
+ goto out9;
+
+ err = register_pernet_subsys(&nfs_net_ops);
+ if (err < 0)
goto out8;
err = nfs_fscache_register();
@@ -1625,10 +1649,12 @@ out5:
out6:
nfs_fscache_unregister();
out7:
- nfs_dns_resolver_destroy();
+ unregister_pernet_subsys(&nfs_net_ops);
out8:
- nfs_idmap_quit();
+ nfs_dns_resolver_destroy();
out9:
+ nfs_idmap_quit();
+out10:
return err;
}
@@ -1640,6 +1666,7 @@ static void __exit exit_nfs_fs(void)
nfs_destroy_inodecache();
nfs_destroy_nfspagecache();
nfs_fscache_unregister();
+ unregister_pernet_subsys(&nfs_net_ops);
nfs_dns_resolver_destroy();
nfs_idmap_quit();
#ifdef CONFIG_PROC_FS
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