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| author |   Stanislav Kinsbursky <skinsbursky@parallels.com> | 2011-12-26 15:39:39 +0300 |
|---|---|---|
| committer |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-01-31 18:20:24 -0500 |
| commit | c21a588f35b1c50304e505fad542b3aab0814266 (patch) | |
| tree | 2dda83e8d5f62eb9892c425941265aeeb278e952 /include/linux/sunrpc/rpc_pipe_fs.h | |
| parent | SUNRPC: put pipefs superblock link on network namespace (diff) | |
| download | linux-dev-c21a588f35b1c50304e505fad542b3aab0814266.tar.xz linux-dev-c21a588f35b1c50304e505fad542b3aab0814266.zip | |
SUNRPC: pipefs per-net operations helper introduced
During per-net pipes creation and destruction we have to make sure, that pipefs
sb exists for the whole creation/destruction cycle. This is done by using
special mutex which controls pipefs sb reference on network namespace context.
Helper consists of two parts: first of them (rpc_get_dentry_net) searches for
dentry with specified name and returns with mutex taken on success. When pipe
creation or destructions is completed, caller should release this mutex by
rpc_put_dentry_net call.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/sunrpc/rpc_pipe_fs.h')
| -rw-r--r-- | include/linux/sunrpc/rpc_pipe_fs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h index 2f3382230141..c13fca34dc9c 100644 --- a/include/linux/sunrpc/rpc_pipe_fs.h +++ b/include/linux/sunrpc/rpc_pipe_fs.h @@ -53,6 +53,9 @@ enum { extern struct dentry *rpc_d_lookup_sb(const struct super_block *sb, const unsigned char *dir_name); +extern void rpc_pipefs_init_net(struct net *net); +extern struct super_block *rpc_get_sb_net(const struct net *net); +extern void rpc_put_sb_net(const struct net *net); extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *, char __user *, size_t); |