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Date: Mon, 17 Oct 2011 16:10:51 +0300 From: Stanislav Kinsbursky <skinsbursky@...allels.com> To: Trond.Myklebust@...app.com Cc: linux-nfs@...r.kernel.org, xemul@...allels.com, neilb@...e.de, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bfields@...ldses.org, davem@...emloft.net, devel@...nvz.org Subject: [RFC PATCH 4/5] SUNRPC: put pipefs superblock link on network namespace We have modules (like, pNFS blocklayout module) which creates pipes on rpc_pipefs. Thus we need per-net operations for them. To make it possible to create piepes in per-net operations, we require super block. So we have to put sb link on network namespace context. Note, that dont't hardly require to create pipes in per-net operations. IOW, if pipefs wan't mounted yet, that no sb link reference will peresent on network namespace. In this case we just passing through pipe creation. The pipe will be created druing pipefs mount notification. Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com> --- net/sunrpc/netns.h | 2 ++ net/sunrpc/rpc_pipe.c | 4 ++++ 2 files changed, 6 insertions(+), 0 deletions(-) diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h index d013bf2..b384252 100644 --- a/net/sunrpc/netns.h +++ b/net/sunrpc/netns.h @@ -9,6 +9,8 @@ struct cache_detail; struct sunrpc_net { struct proc_dir_entry *proc_net_rpc; struct cache_detail *ip_map_cache; + + struct super_block *pipefs_sb; }; extern int sunrpc_net_id; diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index a8a8812..a873f03 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -1039,6 +1039,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent) struct inode *inode; struct dentry *root; struct net *net = current->nsproxy->net_ns; + struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); int err; sb->s_blocksize = PAGE_CACHE_SIZE; @@ -1063,6 +1064,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent) if (err) goto err_depopulate; sb->s_fs_info = get_net(net); + sn->pipefs_sb = sb; return 0; err_depopulate: @@ -1081,7 +1083,9 @@ rpc_mount(struct file_system_type *fs_type, void rpc_kill_sb(struct super_block *sb) { struct net *net = sb->s_fs_info; + struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); + sn->pipefs_sb = NULL; put_net(net); blocking_notifier_call_chain(&rpc_pipefs_notifier_list, RPC_PIPEFS_UMOUNT, -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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