linux-kernel - Re: [PATCH 1/2] SUNRPC: register RPC stats /proc entries in passed network namespace context

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Message-ID: <20111206213322.GE12640@fieldses.org>
Date:	Tue, 6 Dec 2011 16:33:22 -0500
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Stanislav Kinsbursky <skinsbursky@...allels.com>
Cc:	Trond.Myklebust@...app.com, linux-nfs@...r.kernel.org,
	xemul@...allels.com, neilb@...e.de, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, jbottomley@...allels.com,
	davem@...emloft.net, devel@...nvz.org
Subject: Re: [PATCH 1/2] SUNRPC: register RPC stats /proc entries in passed
 network namespace context

On Tue, Dec 06, 2011 at 04:42:40PM +0300, Stanislav Kinsbursky wrote:
> This patch makes it possible to create NFS program entry ("/proc/net/rpc/nfs")
> in passed network namespace context instead of hard-coded "init_net".

Looks straightforward to me.

	Acked-by: J. Bruce Fields <bfields@...hat.com>

--b.

> 
> Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
> 
> ---
>  fs/nfs/inode.c               |    6 +++---
>  include/linux/sunrpc/stats.h |    8 ++++----
>  net/sunrpc/stats.c           |   15 ++++++++-------
>  3 files changed, 15 insertions(+), 14 deletions(-)
> 
> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
> index 98b2508..5cad6c5 100644
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -1623,14 +1623,14 @@ static int __init init_nfs_fs(void)
>  		goto out0;
>  
>  #ifdef CONFIG_PROC_FS
> -	rpc_proc_register(&nfs_rpcstat);
> +	rpc_proc_register(&init_net, &nfs_rpcstat);
>  #endif
>  	if ((err = register_nfs_fs()) != 0)
>  		goto out;
>  	return 0;
>  out:
>  #ifdef CONFIG_PROC_FS
> -	rpc_proc_unregister("nfs");
> +	rpc_proc_unregister(&init_net, "nfs");
>  #endif
>  	nfs_destroy_directcache();
>  out0:
> @@ -1669,7 +1669,7 @@ static void __exit exit_nfs_fs(void)
>  	nfs_dns_resolver_destroy();
>  	nfs_idmap_quit();
>  #ifdef CONFIG_PROC_FS
> -	rpc_proc_unregister("nfs");
> +	rpc_proc_unregister(&init_net, "nfs");
>  #endif
>  	nfs_cleanup_cb_ident_idr();
>  	unregister_nfs_fs();
> diff --git a/include/linux/sunrpc/stats.h b/include/linux/sunrpc/stats.h
> index 680471d..f625b57 100644
> --- a/include/linux/sunrpc/stats.h
> +++ b/include/linux/sunrpc/stats.h
> @@ -58,8 +58,8 @@ void			rpc_modcount(struct inode *, int);
>  #endif
>  
>  #ifdef CONFIG_PROC_FS
> -struct proc_dir_entry *	rpc_proc_register(struct rpc_stat *);
> -void			rpc_proc_unregister(const char *);
> +struct proc_dir_entry *	rpc_proc_register(struct net *,struct rpc_stat *);
> +void			rpc_proc_unregister(struct net *,const char *);
>  void			rpc_proc_zero(struct rpc_program *);
>  struct proc_dir_entry *	svc_proc_register(struct svc_stat *,
>  					  const struct file_operations *);
> @@ -69,8 +69,8 @@ void			svc_seq_show(struct seq_file *,
>  				     const struct svc_stat *);
>  #else
>  
> -static inline struct proc_dir_entry *rpc_proc_register(struct rpc_stat *s) { return NULL; }
> -static inline void rpc_proc_unregister(const char *p) {}
> +static inline struct proc_dir_entry *rpc_proc_register(struct net *, struct rpc_stat *s) { return NULL; }
> +static inline void rpc_proc_unregisterstruct net *, (const char *p) {}
>  static inline void rpc_proc_zero(struct rpc_program *p) {}
>  
>  static inline struct proc_dir_entry *svc_proc_register(struct svc_stat *s,
> diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
> index 80df89d..f0f6e7c 100644
> --- a/net/sunrpc/stats.c
> +++ b/net/sunrpc/stats.c
> @@ -213,28 +213,29 @@ EXPORT_SYMBOL_GPL(rpc_print_iostats);
>   * Register/unregister RPC proc files
>   */
>  static inline struct proc_dir_entry *
> -do_register(const char *name, void *data, const struct file_operations *fops)
> +do_register(struct net *net, const char *name, void *data,
> +	    const struct file_operations *fops)
>  {
>  	struct sunrpc_net *sn;
>  
>  	dprintk("RPC:       registering /proc/net/rpc/%s\n", name);
> -	sn = net_generic(&init_net, sunrpc_net_id);
> +	sn = net_generic(net, sunrpc_net_id);
>  	return proc_create_data(name, 0, sn->proc_net_rpc, fops, data);
>  }
>  
>  struct proc_dir_entry *
> -rpc_proc_register(struct rpc_stat *statp)
> +rpc_proc_register(struct net *net, struct rpc_stat *statp)
>  {
> -	return do_register(statp->program->name, statp, &rpc_proc_fops);
> +	return do_register(net, statp->program->name, statp, &rpc_proc_fops);
>  }
>  EXPORT_SYMBOL_GPL(rpc_proc_register);
>  
>  void
> -rpc_proc_unregister(const char *name)
> +rpc_proc_unregister(struct net *net, const char *name)
>  {
>  	struct sunrpc_net *sn;
>  
> -	sn = net_generic(&init_net, sunrpc_net_id);
> +	sn = net_generic(net, sunrpc_net_id);
>  	remove_proc_entry(name, sn->proc_net_rpc);
>  }
>  EXPORT_SYMBOL_GPL(rpc_proc_unregister);
> @@ -242,7 +243,7 @@ EXPORT_SYMBOL_GPL(rpc_proc_unregister);
>  struct proc_dir_entry *
>  svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
>  {
> -	return do_register(statp->program->pg_name, statp, fops);
> +	return do_register(&init_net, statp->program->pg_name, statp, fops);
>  }
>  EXPORT_SYMBOL_GPL(svc_proc_register);
>  
> 
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