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| author | Stanislav Kinsbursky <skinsbursky@parallels.com> | 2012-04-27 11:00:17 +0200 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-04-27 20:10:00 +0200 |
| commit | ea8cfa06795bb30d2ea61f503ef129284492c06a (patch) | |
| tree | 48fb210bfaedbf1c488bc0b096f1591ce2c98495 /net | |
| parent | SUNRPC: set per-net PipeFS superblock before notification (diff) | |
| download | linux-ea8cfa06795bb30d2ea61f503ef129284492c06a.tar.xz linux-ea8cfa06795bb30d2ea61f503ef129284492c06a.zip | |
SUNRPC: traverse clients tree on PipeFS event
v2: recursion was replaced by loop
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.
Note: event skip helper for clients introduced
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/clnt.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 8a19849ff340..d127bd747527 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 +214,20 @@ 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 = 0; + + for (;; clnt = clnt->cl_parent) { + if (!rpc_clnt_skip_event(clnt, event)) + error = __rpc_clnt_handle_event(clnt, event, sb); + if (error || clnt == clnt->cl_parent) + break; + } + return error; +} + 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 +237,7 @@ 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; |