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SUNRPC: handle GSS AUTH pipes by network namespace aware routines 

This patch makes RPC GSS PipeFs pipes allocated in it's RPC client owner
network namespace context.
Pipes creation and destruction now done in separated functions, which takes
care about PipeFS superblock locking.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2012-01-11 19:18:09 +04:00 committed by Trond Myklebust
parent 0157d021d2
commit ccdc28f81c
1 changed files with 73 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

95
net/sunrpc/auth_gss/auth_gss.c
View File

@ -757,6 +757,73 @@ gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
}
}
static void gss_pipes_dentries_destroy(struct rpc_auth *auth)
{
struct gss_auth *gss_auth;
gss_auth = container_of(auth, struct gss_auth, rpc_auth);
rpc_unlink(gss_auth->pipe[0]->dentry);
rpc_unlink(gss_auth->pipe[1]->dentry);
}
static int gss_pipes_dentries_create(struct rpc_auth *auth)
{
int err;
struct gss_auth *gss_auth;
struct rpc_clnt *clnt;
gss_auth = container_of(auth, struct gss_auth, rpc_auth);
clnt = gss_auth->client;
gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_path.dentry,
"gssd",
clnt, gss_auth->pipe[1]);
if (IS_ERR(gss_auth->pipe[1]->dentry))
return PTR_ERR(gss_auth->pipe[1]->dentry);
gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_path.dentry,
gss_auth->mech->gm_name,
clnt, gss_auth->pipe[0]);
if (IS_ERR(gss_auth->pipe[0]->dentry)) {
err = PTR_ERR(gss_auth->pipe[0]->dentry);
goto err_unlink_pipe_1;
}
return 0;
err_unlink_pipe_1:
rpc_unlink(gss_auth->pipe[1]->dentry);
return err;
}
static void gss_pipes_dentries_destroy_net(struct rpc_clnt *clnt,
struct rpc_auth *auth)
{
struct net *net = clnt->cl_xprt->xprt_net;
struct super_block *sb;
sb = rpc_get_sb_net(net);
if (sb) {
if (clnt->cl_path.dentry)
gss_pipes_dentries_destroy(auth);
rpc_put_sb_net(net);
}
}
static int gss_pipes_dentries_create_net(struct rpc_clnt *clnt,
struct rpc_auth *auth)
{
struct net *net = clnt->cl_xprt->xprt_net;
struct super_block *sb;
int err = 0;
sb = rpc_get_sb_net(net);
if (sb) {
if (clnt->cl_path.dentry)
err = gss_pipes_dentries_create(auth);
rpc_put_sb_net(net);
}
return err;
}
/*
* NOTE: we have the opportunity to use different
* parameters based on the input flavor (which must be a pseudoflavor)
@ -812,31 +879,16 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
err = PTR_ERR(gss_auth->pipe[0]);
goto err_destroy_pipe_1;
}
gss_auth->pipe[1]->dentry = rpc_mkpipe_dentry(clnt->cl_path.dentry,
"gssd",
clnt, gss_auth->pipe[1]);
if (IS_ERR(gss_auth->pipe[1]->dentry)) {
err = PTR_ERR(gss_auth->pipe[1]->dentry);
err = gss_pipes_dentries_create_net(clnt, auth);
if (err)
goto err_destroy_pipe_0;
}
gss_auth->pipe[0]->dentry = rpc_mkpipe_dentry(clnt->cl_path.dentry,
gss_auth->mech->gm_name,
clnt, gss_auth->pipe[0]);
if (IS_ERR(gss_auth->pipe[0]->dentry)) {
err = PTR_ERR(gss_auth->pipe[0]->dentry);
goto err_unlink_pipe_1;
}
err = rpcauth_init_credcache(auth);
if (err)
goto err_unlink_pipe_0;
goto err_unlink_pipes;
return auth;
err_unlink_pipe_0:
rpc_unlink(gss_auth->pipe[0]->dentry);
err_unlink_pipe_1:
rpc_unlink(gss_auth->pipe[1]->dentry);
err_unlink_pipes:
gss_pipes_dentries_destroy_net(clnt, auth);
err_destroy_pipe_0:
rpc_destroy_pipe_data(gss_auth->pipe[0]);
err_destroy_pipe_1:
@ -853,8 +905,7 @@ out_dec:
static void
gss_free(struct gss_auth *gss_auth)
{
rpc_unlink(gss_auth->pipe[0]->dentry);
rpc_unlink(gss_auth->pipe[1]->dentry);
gss_pipes_dentries_destroy_net(gss_auth->client, &gss_auth->rpc_auth);
rpc_destroy_pipe_data(gss_auth->pipe[0]);
rpc_destroy_pipe_data(gss_auth->pipe[1]);
gss_mech_put(gss_auth->mech);