diff options
| -rw-r--r-- | fs/nfs/idmap.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index b5c6d8eb7e03..d4db3b6f4b8e 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -553,23 +553,41 @@ static int __rpc_pipefs_event(struct nfs_client *clp, unsigned long event, return err; } -static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, - void *ptr) +static struct nfs_client *nfs_get_client_for_event(struct net *net, int event) { - struct super_block *sb = ptr; - struct nfs_net *nn = net_generic(sb->s_fs_info, nfs_net_id); + struct nfs_net *nn = net_generic(net, nfs_net_id); + struct dentry *cl_dentry; struct nfs_client *clp; - int error = 0; spin_lock(&nn->nfs_client_lock); list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { if (clp->rpc_ops != &nfs_v4_clientops) continue; + cl_dentry = clp->cl_idmap->idmap_pipe->dentry; + if (((event == RPC_PIPEFS_MOUNT) && cl_dentry) || + ((event == RPC_PIPEFS_UMOUNT) && !cl_dentry)) + continue; + atomic_inc(&clp->cl_count); + spin_unlock(&nn->nfs_client_lock); + return clp; + } + spin_unlock(&nn->nfs_client_lock); + return NULL; +} + +static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event, + void *ptr) +{ + struct super_block *sb = ptr; + struct nfs_client *clp; + int error = 0; + + while ((clp = nfs_get_client_for_event(sb->s_fs_info, event))) { error = __rpc_pipefs_event(clp, event, sb); + nfs_put_client(clp); if (error) break; } - spin_unlock(&nn->nfs_client_lock); return error; } |