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NFS associate sessionid with callback connection 

The sessions based callback service is started prior to the CREATE_SESSION call
so that it can handle CB_NULL requests which can be sent before the
CREATE_SESSION call returns and the session ID is known.

Set the callback sessionid after a sucessful CREATE_SESSION.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2011-01-06 02:04:31 +00:00 committed by Trond Myklebust
parent f4eecd5da3
commit 2c2618c6f2
5 changed files with 42 additions and 1 deletions
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31
fs/nfs/callback.c
View File

@ -136,6 +136,33 @@ nfs4_callback_up(struct svc_serv *serv)
}
#if defined(CONFIG_NFS_V4_1)
/*
* * CB_SEQUENCE operations will fail until the callback sessionid is set.
* */
int nfs4_set_callback_sessionid(struct nfs_client *clp)
{
struct svc_serv *serv = clp->cl_rpcclient->cl_xprt->bc_serv;
struct nfs4_sessionid *bc_sid;
if (!serv->bc_xprt)
return -EINVAL;
/* on success freed in xprt_free */
bc_sid = kmalloc(sizeof(struct nfs4_sessionid), GFP_KERNEL);
if (!bc_sid)
return -ENOMEM;
memcpy(bc_sid->data, &clp->cl_session->sess_id.data,
NFS4_MAX_SESSIONID_LEN);
spin_lock_bh(&serv->sv_cb_lock);
serv->bc_xprt->xpt_bc_sid = bc_sid;
spin_unlock_bh(&serv->sv_cb_lock);
dprintk("%s set xpt_bc_sid=%u:%u:%u:%u for bc_xprt %p\n", __func__,
((u32 *)bc_sid->data)[0], ((u32 *)bc_sid->data)[1],
((u32 *)bc_sid->data)[2], ((u32 *)bc_sid->data)[3],
serv->bc_xprt);
return 0;
}
/*
* The callback service for NFSv4.1 callbacks
*/
@ -241,6 +268,10 @@ static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt,
struct nfs_callback_data *cb_info)
{
}
int nfs4_set_callback_sessionid(struct nfs_client *clp)
{
return 0;
}
#endif /* CONFIG_NFS_V4_1 */
/*

1
fs/nfs/callback.h
View File

@ -137,6 +137,7 @@ extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
extern void nfs_callback_down(int minorversion);
extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
const nfs4_stateid *stateid);
extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
#endif /* CONFIG_NFS_V4 */
/*
* nfs41: Callbacks are expected to not cause substantial latency,

6
fs/nfs/nfs4state.c
View File

@ -192,6 +192,12 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
status = nfs4_proc_create_session(clp);
if (status != 0)
goto out;
status = nfs4_set_callback_sessionid(clp);
if (status != 0) {
printk(KERN_WARNING "Sessionid not set. No callback service\n");
nfs_callback_down(1);
status = 0;
}
nfs41_setup_state_renewal(clp);
nfs_mark_client_ready(clp, NFS_CS_READY);
out:

1
include/linux/sunrpc/svc_xprt.h
View File

@ -78,6 +78,7 @@ struct svc_xprt {
size_t xpt_remotelen; /* length of address */
struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */
struct list_head xpt_users; /* callbacks on free */
void *xpt_bc_sid; /* back channel session ID */
struct net *xpt_net;
};

4
net/sunrpc/svcsock.c
View File

@ -1605,7 +1605,9 @@ static struct svc_xprt *svc_bc_create_socket(struct svc_serv *serv,
*/
static void svc_bc_sock_free(struct svc_xprt *xprt)
{
if (xprt)
if (xprt) {
kfree(xprt->xpt_bc_sid);
kfree(container_of(xprt, struct svc_sock, sk_xprt));
}
}
#endif /* CONFIG_NFS_V4_1 */