[PATCH v3 05/11] NFS: callback service start function introduced

Stanislav Kinsbursky
2012-07-03T16:23:17Z

This is just a code move, which from my POW makes code looks better.
I.e. now on start we have 3 different stages:
1) Service creation.
2) Service per-net data allocation.
3) Service start.

Patch also renames goto label "out_err:" into "err_start:" to reflect new
changes.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
---
fs/nfs/callback.c | 77 +++++++++++++++++++++++++++++++----------------------
1 files changed, 45 insertions(+), 32 deletions(-)

diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 41150ef..550d2a2 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -241,6 +241,46 @@ static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt,
}
#endif /* CONFIG_NFS_V4_1 */

+static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
+ struct svc_serv *serv)
+{
+ struct svc_rqst *rqstp;
+ int (*callback_svc)(void *vrqstp);
+ struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion];
+ char svc_name[12];
+ int ret;
+ int minorversion_setup;
+
+ nfs_callback_bc_serv(minorversion, xprt, serv);
+
+ minorversion_setup = nfs_minorversion_callback_svc_setup(minorversion,
+ serv, &rqstp, &callback_svc);
+ if (!minorversion_setup) {
+ /* v4.0 callback setup */
+ rqstp = nfs4_callback_up(serv);
+ callback_svc = nfs4_callback_svc;
+ }
+
+ if (IS_ERR(rqstp))
+ return PTR_ERR(rqstp);
+
+ svc_sock_update_bufs(serv);
+
+ sprintf(svc_name, "nfsv4.%u-svc", minorversion);
+ cb_info->serv = serv;
+ cb_info->rqst = rqstp;
+ cb_info->task = kthread_run(callback_svc, cb_info->rqst, svc_name);
+ if (IS_ERR(cb_info->task)) {
+ ret = PTR_ERR(cb_info->task);
+ svc_exit_thread(cb_info->rqst);
+ cb_info->rqst = NULL;
+ cb_info->task = NULL;
+ return PTR_ERR(cb_info->task);
+ }
+ dprintk("nfs_callback_up: service started\n");
+ return 0;
+}
+
static int nfs_callback_up_net(int minorversion, struct svc_serv *serv, struct net *net)
{
int ret;
@@ -311,12 +351,8 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion)
int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)
{
struct svc_serv *serv;
- struct svc_rqst *rqstp;
- int (*callback_svc)(void *vrqstp);
struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion];
- char svc_name[12];
int ret = 0;
- int minorversion_setup;
struct net *net = xprt->xprt_net;

mutex_lock(&nfs_callback_mutex);
@@ -336,34 +372,10 @@ int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)
if (ret < 0)
goto err_net;

- nfs_callback_bc_serv(minorversion, xprt, serv);
-
- minorversion_setup = nfs_minorversion_callback_svc_setup(minorversion,
- serv, &rqstp, &callback_svc);
- if (!minorversion_setup) {
- /* v4.0 callback setup */
- rqstp = nfs4_callback_up(serv);
- callback_svc = nfs4_callback_svc;
- }
-
- if (IS_ERR(rqstp)) {
- ret = PTR_ERR(rqstp);
- goto out_err;
- }
-
- svc_sock_update_bufs(serv);
+ ret = nfs_callback_start_svc(minorversion, xprt, serv);
+ if (ret < 0)
+ goto err_start;

- sprintf(svc_name, "nfsv4.%u-svc", minorversion);
- cb_info->serv = serv;
- cb_info->rqst = rqstp;
- cb_info->task = kthread_run(callback_svc, cb_info->rqst, svc_name);
- if (IS_ERR(cb_info->task)) {
- ret = PTR_ERR(cb_info->task);
- svc_exit_thread(cb_info->rqst);
- cb_info->rqst = NULL;
- cb_info->task = NULL;
- goto out_err;
- }
out:
/*
* svc_create creates the svc_serv with sv_nrthreads == 1, and then
@@ -375,7 +387,8 @@ out:
err_create:
mutex_unlock(&nfs_callback_mutex);
return ret;
-out_err:
+
+err_start:
svc_shutdown_net(serv, net);
err_net:
dprintk("NFS: Couldn't create callback socket or server thread; "