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Lockd: per-net up and down routines introduced 

This patch introduces per-net Lockd initialization and destruction routines.
The logic is the same as in global Lockd up and down routines. Probably the
solution is not the best one. But at least it looks clear.
So per-net "up" routine are called only in case of lockd is running already. If
per-net resources are not allocated yet, then service is being registered with
local portmapper and lockd sockets created.
Per-net "down" routine is called on every lockd_down() call in case of global
users counter is not zero.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
wifi-calibration
Stanislav Kinsbursky 2012-01-31 15:08:05 +04:00 committed by Trond Myklebust
parent a9c5d73a8d
commit bb2224df5f
3 changed files with 49 additions and 3 deletions
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47
fs/lockd/svc.c
View File

@ -251,6 +251,45 @@ out_err:
return err;
}
static int lockd_up_net(struct net *net)
{
struct lockd_net *ln = net_generic(net, lockd_net_id);
struct svc_serv *serv = nlmsvc_rqst->rq_server;
int error;
if (ln->nlmsvc_users)
return 0;
error = svc_rpcb_setup(serv, net);
if (error)
goto err_rpcb;
error = make_socks(serv, net);
if (error < 0)
goto err_socks;
return 0;
err_socks:
svc_rpcb_cleanup(serv, net);
err_rpcb:
return error;
}
static void lockd_down_net(struct net *net)
{
struct lockd_net *ln = net_generic(net, lockd_net_id);
struct svc_serv *serv = nlmsvc_rqst->rq_server;
if (ln->nlmsvc_users) {
if (--ln->nlmsvc_users == 0)
svc_shutdown_net(serv, net);
} else {
printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n",
nlmsvc_task, net);
BUG();
}
}
/*
* Bring up the lockd process if it's not already up.
*/
@ -264,8 +303,10 @@ int lockd_up(void)
/*
* Check whether we're already up and running.
*/
if (nlmsvc_rqst)
if (nlmsvc_rqst) {
error = lockd_up_net(net);
goto out;
}
/*
* Sanity check: if there's no pid,
@ -339,8 +380,10 @@ lockd_down(void)
{
mutex_lock(&nlmsvc_mutex);
if (nlmsvc_users) {
if (--nlmsvc_users)
if (--nlmsvc_users) {
lockd_down_net(current->nsproxy->net_ns);
goto out;
}
} else {
printk(KERN_ERR "lockd_down: no users! task=%p\n",
nlmsvc_task);

2
include/linux/sunrpc/svc.h
View File

@ -414,6 +414,7 @@ struct svc_procedure {
/*
* Function prototypes.
*/
int svc_rpcb_setup(struct svc_serv *serv, struct net *net);
void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net);
struct svc_serv *svc_create(struct svc_program *, unsigned int,
void (*shutdown)(struct svc_serv *, struct net *net));
@ -426,6 +427,7 @@ struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
int svc_pool_stats_open(struct svc_serv *serv, struct file *file);
void svc_destroy(struct svc_serv *);
void svc_shutdown_net(struct svc_serv *, struct net *);
int svc_process(struct svc_rqst *);
int bc_svc_process(struct svc_serv *, struct rpc_rqst *,
struct svc_rqst *);

3
net/sunrpc/svc.c
View File

@ -369,7 +369,7 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
return &serv->sv_pools[pidx % serv->sv_nrpools];
}
static int svc_rpcb_setup(struct svc_serv *serv, struct net *net)
int svc_rpcb_setup(struct svc_serv *serv, struct net *net)
{
int err;
@ -381,6 +381,7 @@ static int svc_rpcb_setup(struct svc_serv *serv, struct net *net)
svc_unregister(serv, net);
return 0;
}
EXPORT_SYMBOL_GPL(svc_rpcb_setup);
void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net)
{