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NFS: make cb_ident_idr per net ns

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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
Download Patch File Download Diff File Expand all files Collapse all files

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