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NFS: make cb_ident_idr per net ns 

This patch makes ID's infrastructure network namespace aware. This was done
mainly because of nfs_client_lock, which is desired to be per network
namespace, but protects NFS clients ID's.

NOTE: NFS client's net pointer have to be set prior to ID initialization,
proper assignment was moved.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2012-01-23 17:26:22 +00:00 committed by Trond Myklebust
parent c25d32b263
commit 28cd1b3f26
5 changed files with 25 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/nfs/callback_xdr.c
View File

@ -876,7 +876,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
return rpc_garbage_args;
if (hdr_arg.minorversion == 0) {
cps.clp = nfs4_find_client_ident(hdr_arg.cb_ident);
cps.clp = nfs4_find_client_ident(rqstp->rq_xprt->xpt_net, hdr_arg.cb_ident);
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
return rpc_drop_reply;
}

28
fs/nfs/client.c
View File

@ -58,7 +58,6 @@
DEFINE_SPINLOCK(nfs_client_lock);
static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
#ifdef CONFIG_NFS_V4
static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */
/*
* Get a unique NFSv4.0 callback identifier which will be used
@ -67,14 +66,15 @@ static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */
static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
{
int ret = 0;
struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
if (clp->rpc_ops->version != 4 || minorversion != 0)
return ret;
retry:
if (!idr_pre_get(&cb_ident_idr, GFP_KERNEL))
if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL))
return -ENOMEM;
spin_lock(&nfs_client_lock);
ret = idr_get_new(&cb_ident_idr, clp, &clp->cl_cb_ident);
ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident);
spin_unlock(&nfs_client_lock);
if (ret == -EAGAIN)
goto retry;
@ -173,6 +173,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
clp->cl_rpcclient = ERR_PTR(-EINVAL);
clp->cl_proto = cl_init->proto;
clp->net = cl_init->net;
#ifdef CONFIG_NFS_V4
err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
@ -191,7 +192,6 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
if (!IS_ERR(cred))
clp->cl_machine_cred = cred;
nfs_fscache_get_client_cookie(clp);
clp->net = cl_init->net;
return clp;
@ -236,16 +236,20 @@ static void nfs4_shutdown_client(struct nfs_client *clp)
}
/* idr_remove_all is not needed as all id's are removed by nfs_put_client */
void nfs_cleanup_cb_ident_idr(void)
void nfs_cleanup_cb_ident_idr(struct net *net)
{
idr_destroy(&cb_ident_idr);
struct nfs_net *nn = net_generic(net, nfs_net_id);
idr_destroy(&nn->cb_ident_idr);
}
/* nfs_client_lock held */
static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
{
struct nfs_net *nn = net_generic(clp->net, nfs_net_id);
if (clp->cl_cb_ident)
idr_remove(&cb_ident_idr, clp->cl_cb_ident);
idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
}
static void pnfs_init_server(struct nfs_server *server)
@ -263,7 +267,7 @@ static void nfs4_shutdown_client(struct nfs_client *clp)
{
}
void nfs_cleanup_cb_ident_idr(void)
void nfs_cleanup_cb_ident_idr(struct net *net)
{
}
@ -1203,12 +1207,13 @@ error:
* Find a client by callback identifier
*/
struct nfs_client *
nfs4_find_client_ident(int cb_ident)
nfs4_find_client_ident(struct net *net, int cb_ident)
{
struct nfs_client *clp;
struct nfs_net *nn = net_generic(net, nfs_net_id);
spin_lock(&nfs_client_lock);
clp = idr_find(&cb_ident_idr, cb_ident);
clp = idr_find(&nn->cb_ident_idr, cb_ident);
if (clp)
atomic_inc(&clp->cl_count);
spin_unlock(&nfs_client_lock);
@ -1765,6 +1770,9 @@ void nfs_clients_init(struct net *net)
INIT_LIST_HEAD(&nn->nfs_client_list);
INIT_LIST_HEAD(&nn->nfs_volume_list);
#ifdef CONFIG_NFS_V4
idr_init(&nn->cb_ident_idr);
#endif
}
#ifdef CONFIG_PROC_FS

2
fs/nfs/inode.c
View File

@ -1565,6 +1565,7 @@ static int nfs_net_init(struct net *net)
static void nfs_net_exit(struct net *net)
{
nfs_dns_resolver_cache_destroy(net);
nfs_cleanup_cb_ident_idr(net);
}
static struct pernet_operations nfs_net_ops = {
@ -1674,7 +1675,6 @@ static void __exit exit_nfs_fs(void)
#ifdef CONFIG_PROC_FS
rpc_proc_unregister(&init_net, "nfs");
#endif
nfs_cleanup_cb_ident_idr();
unregister_nfs_fs();
nfs_fs_proc_exit();
nfsiod_stop();

4
fs/nfs/internal.h
View File

@ -148,9 +148,9 @@ extern void nfs_umount(const struct nfs_mount_request *info);
extern const struct rpc_program nfs_program;
extern void nfs_clients_init(struct net *net);
extern void nfs_cleanup_cb_ident_idr(void);
extern void nfs_cleanup_cb_ident_idr(struct net *);
extern void nfs_put_client(struct nfs_client *);
extern struct nfs_client *nfs4_find_client_ident(int);
extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
extern struct nfs_client *
nfs4_find_client_sessionid(const struct sockaddr *, struct nfs4_sessionid *);
extern struct nfs_server *nfs_create_server(

3
fs/nfs/netns.h
View File

@ -9,6 +9,9 @@ struct nfs_net {
struct rpc_pipe *bl_device_pipe;
struct list_head nfs_client_list;
struct list_head nfs_volume_list;
#ifdef CONFIG_NFS_V4
struct idr cb_ident_idr; /* Protected by nfs_client_lock */
#endif
};
extern int nfs_net_id;