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Commit 71468513 authored by Benny Halevy's avatar Benny Halevy
Browse files

nfs41: minorversion support for nfs4_{init,destroy}_callback 



move nfs4_init_callback into nfs4_init_client_minor_version
and nfs4_destroy_callback into nfs4_clear_client_minor_version

as these need to happen also when auto-negotiating the minorversion
once the callback service for nfs41 becomes different than for nfs4.0

Signed-off-by: default avatarBenny Halevy <bhalevy@panasas.com>
[nfs41: Fix checkpatch warning]
Signed-off-by: default avatarRicardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: default avatarBenny Halevy <bhalevy@panasas.com>
[Type check arguments of nfs_callback_up]
Signed-off-by: default avatarRicardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: default avatarBenny Halevy <bhalevy@panasas.com>
[nfs41: Backchannel: Remove FIXME comment]
Signed-off-by: default avatarRicardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: default avatarBenny Halevy <bhalevy@panasas.com>
parent 9bdaa86d

fs/nfs/callback.c

+46 −19
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ module_param_call(callback_tcpport, param_set_port, param_get_int, 
 * This is the callback kernel thread.

 */

static int

nfs_callback_svc(void *vrqstp)

nfs4_callback_svc(void *vrqstp)

{

	int err, preverr = 0;

	struct svc_rqst *rqstp = vrqstp;
@@ -97,20 +97,12 @@ nfs_callback_svc(void *vrqstp) 
}



/*

 * Bring up the callback thread if it is not already up.

 * Prepare to bring up the NFSv4 callback service

 */

int nfs_callback_up(void)

struct svc_rqst *

nfs4_callback_up(struct svc_serv *serv)

{

	struct svc_serv *serv = NULL;

	int ret = 0;



	mutex_lock(&nfs_callback_mutex);

	if (nfs_callback_info.users++ || nfs_callback_info.task != NULL)

		goto out;

	serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL);

	ret = -ENOMEM;

	if (!serv)

		goto out_err;

	int ret;



	ret = svc_create_xprt(serv, "tcp", PF_INET,

				nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS);
@@ -131,18 +123,53 @@ int nfs_callback_up(void) 
		goto out_err;

#endif	/* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */



	nfs_callback_info.rqst = svc_prepare_thread(serv, &serv->sv_pools[0]);

	if (IS_ERR(nfs_callback_info.rqst)) {

		ret = PTR_ERR(nfs_callback_info.rqst);

		nfs_callback_info.rqst = NULL;

	return svc_prepare_thread(serv, &serv->sv_pools[0]);



out_err:

	if (ret == 0)

		ret = -ENOMEM;

	return ERR_PTR(ret);

}



/*

 * Bring up the callback thread if it is not already up.

 */

int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)

{

	struct svc_serv *serv = NULL;

	struct svc_rqst *rqstp;

	int (*callback_svc)(void *vrqstp);

	char svc_name[12];

	int ret = 0;



	mutex_lock(&nfs_callback_mutex);

	if (nfs_callback_info.users++ || nfs_callback_info.task != NULL)

		goto out;

	serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL);

	if (!serv) {

		ret = -ENOMEM;

		goto out_err;

	}



	if (!minorversion) {

		rqstp = nfs4_callback_up(serv);

		callback_svc = nfs4_callback_svc;

	} else {

		BUG();	/* for now */

	}



	if (IS_ERR(rqstp)) {

		ret = PTR_ERR(rqstp);

		goto out_err;

	}



	svc_sock_update_bufs(serv);



	nfs_callback_info.task = kthread_run(nfs_callback_svc,

	sprintf(svc_name, "nfsv4.%u-svc", minorversion);

	nfs_callback_info.rqst = rqstp;

	nfs_callback_info.task = kthread_run(callback_svc,

					     nfs_callback_info.rqst,

					     "nfsv4-svc");

					     svc_name);

	if (IS_ERR(nfs_callback_info.task)) {

		ret = PTR_ERR(nfs_callback_info.task);

		svc_exit_thread(nfs_callback_info.rqst);

fs/nfs/callback.h

+1 −1
Original line number Diff line number Diff line
@@ -63,7 +63,7 @@ extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getat 
extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);



#ifdef CONFIG_NFS_V4

extern int nfs_callback_up(void);

extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);

extern void nfs_callback_down(void);

#else

#define nfs_callback_up()	(0)

fs/nfs/client.c

+7 −14
Original line number Diff line number Diff line
@@ -47,9 +47,6 @@ 
#include "internal.h"

#include "fscache.h"



static int nfs4_init_callback(struct nfs_client *);

static void nfs4_destroy_callback(struct nfs_client *);



#define NFSDBG_FACILITY		NFSDBG_CLIENT



static DEFINE_SPINLOCK(nfs_client_lock);
@@ -124,9 +121,6 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ 


	clp->rpc_ops = cl_init->rpc_ops;



	if (nfs4_init_callback(clp) < 0)

		goto error_2;



	atomic_set(&clp->cl_count, 1);

	clp->cl_cons_state = NFS_CS_INITING;
@@ -136,7 +130,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ 
	if (cl_init->hostname) {

		clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);

		if (!clp->cl_hostname)

			goto error_3;

			goto error_cleanup;

	}



	INIT_LIST_HEAD(&clp->cl_superblocks);
@@ -161,9 +155,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ 


	return clp;



error_3:

	nfs4_destroy_callback(clp);

error_2:

error_cleanup:

	kfree(clp);

error_0:

	return NULL;
@@ -207,6 +199,8 @@ static void nfs4_clear_client_minor_version(struct nfs_client *clp) 


	clp->cl_call_sync = _nfs4_call_sync;

#endif /* CONFIG_NFS_V4_1 */



	nfs4_destroy_callback(clp);

}



/*
@@ -225,8 +219,6 @@ static void nfs_free_client(struct nfs_client *clp) 
	if (!IS_ERR(clp->cl_rpcclient))

		rpc_shutdown_client(clp->cl_rpcclient);



	nfs4_destroy_callback(clp);



	if (clp->cl_machine_cred != NULL)

		put_rpccred(clp->cl_machine_cred);
@@ -1104,7 +1096,8 @@ static int nfs4_init_callback(struct nfs_client *clp) 
	int error;



	if (clp->rpc_ops->version == 4) {

		error = nfs_callback_up();

		error = nfs_callback_up(clp->cl_minorversion,

					clp->cl_rpcclient->cl_xprt);

		if (error < 0) {

			dprintk("%s: failed to start callback. Error = %d\n",

				__func__, error);
@@ -1139,7 +1132,7 @@ static int nfs4_init_client_minor_version(struct nfs_client *clp) 
	}

#endif /* CONFIG_NFS_V4_1 */



	return 0;

	return nfs4_init_callback(clp);

}



/*