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Date: Fri, 20 Apr 2012 18:19:43 +0400 From: Stanislav Kinsbursky <skinsbursky@...allels.com> To: bfields@...ldses.org, Trond.Myklebust@...app.com Cc: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org, devel@...nvz.org Subject: [PATCH 2/3] SUNRPC: traverse clients tree on PipeFS event If client is a clone, then it's parent can not be in the list. But parent's PipeFS dentries have to be created and destroyed as well. Note: event skip helper for clients introduced Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com> --- net/sunrpc/clnt.c | 30 ++++++++++++++++++++++++++---- 1 files changed, 26 insertions(+), 4 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 8a19849..80b59f1 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -176,8 +176,16 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, const char *dir_name) return 0; } -static int __rpc_pipefs_event(struct rpc_clnt *clnt, unsigned long event, - struct super_block *sb) +static inline int rpc_clnt_skip_event(struct rpc_clnt *clnt, unsigned long event) +{ + if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) || + ((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry)) + return 1; + return 0; +} + +static int __rpc_clnt_handle_event(struct rpc_clnt *clnt, unsigned long event, + struct super_block *sb) { struct dentry *dentry; int err = 0; @@ -206,6 +214,21 @@ static int __rpc_pipefs_event(struct rpc_clnt *clnt, unsigned long event, return err; } +static int __rpc_pipefs_event(struct rpc_clnt *clnt, unsigned long event, + struct super_block *sb) +{ + int error; + + if (!rpc_clnt_skip_event(clnt, event)) { + error = __rpc_clnt_handle_event(clnt, event, sb); + if (error) + return error; + } + if (clnt != clnt->cl_parent) + return __rpc_pipefs_event(clnt->cl_parent, event, sb); + return 0; +} + static struct rpc_clnt *rpc_get_client_for_event(struct net *net, int event) { struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); @@ -215,8 +238,7 @@ static struct rpc_clnt *rpc_get_client_for_event(struct net *net, int event) list_for_each_entry(clnt, &sn->all_clients, cl_clients) { if (clnt->cl_program->pipe_dir_name == NULL) break; - if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) || - ((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry)) + if (rpc_clnt_skip_event(clnt, event)) continue; if (atomic_inc_not_zero(&clnt->cl_count) == 0) continue; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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