diff options
Diffstat (limited to 'fs/nfs/dns_resolve.c')
| -rw-r--r-- | fs/nfs/dns_resolve.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c index 9aea78ab86ac..200eb67c95d9 100644 --- a/fs/nfs/dns_resolve.c +++ b/fs/nfs/dns_resolve.c @@ -40,6 +40,7 @@ ssize_t nfs_dns_resolve_name(struct net *net, char *name, size_t namelen, #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/cache.h> #include <linux/sunrpc/svcauth.h> +#include <linux/sunrpc/rpc_pipe_fs.h> #include "dns_resolve.h" #include "cache_lib.h" @@ -400,12 +401,47 @@ void nfs_dns_resolver_cache_destroy(struct net *net) kfree(cd); } +static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, + void *ptr) +{ + struct super_block *sb = ptr; + struct net *net = sb->s_fs_info; + struct nfs_net *nn = net_generic(net, nfs_net_id); + struct cache_detail *cd = nn->nfs_dns_resolve; + int ret = 0; + + if (cd == NULL) + return 0; + + if (!try_module_get(THIS_MODULE)) + return 0; + + switch (event) { + case RPC_PIPEFS_MOUNT: + ret = nfs_cache_register_sb(sb, cd); + break; + case RPC_PIPEFS_UMOUNT: + nfs_cache_unregister_sb(sb, cd); + break; + default: + ret = -ENOTSUPP; + break; + } + module_put(THIS_MODULE); + return ret; +} + +static struct notifier_block nfs_dns_resolver_block = { + .notifier_call = rpc_pipefs_event, +}; + int nfs_dns_resolver_init(void) { - return 0; + return rpc_pipefs_notifier_register(&nfs_dns_resolver_block); } void nfs_dns_resolver_destroy(void) { + rpc_pipefs_notifier_unregister(&nfs_dns_resolver_block); } #endif |