From f4b52bb0842642a781a23dd36ae364253e03fdb4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 29 Aug 2016 20:03:48 -0400 Subject: NFSv4.x: Set up struct svc_serv_ops for the callback channel In order to manage the threads using svc_set_num_threads, we need to fill in a few extra fields. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/callback.c | 57 +++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 39 insertions(+), 18 deletions(-) (limited to 'fs/nfs') diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index 52a2831..478bb0a 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -155,13 +155,6 @@ nfs41_callback_up(struct svc_serv *serv) return rqstp; } -static void nfs_minorversion_callback_svc_setup(struct svc_serv *serv, - struct svc_rqst **rqstpp, int (**callback_svc)(void *vrqstp)) -{ - *rqstpp = nfs41_callback_up(serv); - *callback_svc = nfs41_callback_svc; -} - static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt, struct svc_serv *serv) { @@ -173,11 +166,10 @@ static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt, xprt->bc_serv = serv; } #else -static void nfs_minorversion_callback_svc_setup(struct svc_serv *serv, - struct svc_rqst **rqstpp, int (**callback_svc)(void *vrqstp)) +static struct svc_rqst * +nfs41_callback_up(struct svc_serv *serv) { - *rqstpp = ERR_PTR(-ENOTSUPP); - *callback_svc = ERR_PTR(-ENOTSUPP); + return ERR_PTR(-ENOTSUPP); } static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt, @@ -190,7 +182,6 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, struct svc_serv *serv) { struct svc_rqst *rqstp; - int (*callback_svc)(void *vrqstp); struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; int ret; @@ -203,11 +194,9 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, case 0: /* v4.0 callback setup */ rqstp = nfs4_callback_up(serv); - callback_svc = nfs4_callback_svc; break; default: - nfs_minorversion_callback_svc_setup(serv, - &rqstp, &callback_svc); + rqstp = nfs41_callback_up(serv); } if (IS_ERR(rqstp)) @@ -217,7 +206,8 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, cb_info->serv = serv; cb_info->rqst = rqstp; - cb_info->task = kthread_create(callback_svc, cb_info->rqst, + cb_info->task = kthread_create(serv->sv_ops->svo_function, + cb_info->rqst, "nfsv4.%u-svc", minorversion); if (IS_ERR(cb_info->task)) { ret = PTR_ERR(cb_info->task); @@ -281,14 +271,34 @@ err_bind: return ret; } -static struct svc_serv_ops nfs_cb_sv_ops = { +static struct svc_serv_ops nfs40_cb_sv_ops = { + .svo_function = nfs4_callback_svc, .svo_enqueue_xprt = svc_xprt_do_enqueue, + .svo_module = THIS_MODULE, +}; +#if defined(CONFIG_NFS_V4_1) +static struct svc_serv_ops nfs41_cb_sv_ops = { + .svo_function = nfs41_callback_svc, + .svo_enqueue_xprt = svc_xprt_do_enqueue, + .svo_module = THIS_MODULE, }; +struct svc_serv_ops *nfs4_cb_sv_ops[] = { + [0] = &nfs40_cb_sv_ops, + [1] = &nfs41_cb_sv_ops, +}; +#else +struct svc_serv_ops *nfs4_cb_sv_ops[] = { + [0] = &nfs40_cb_sv_ops, + [1] = NULL, +}; +#endif + static struct svc_serv *nfs_callback_create_svc(int minorversion) { struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion]; struct svc_serv *serv; + struct svc_serv_ops *sv_ops; /* * Check whether we're already up and running. @@ -302,6 +312,17 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion) return cb_info->serv; } + switch (minorversion) { + case 0: + sv_ops = nfs4_cb_sv_ops[0]; + break; + default: + sv_ops = nfs4_cb_sv_ops[1]; + } + + if (sv_ops == NULL) + return ERR_PTR(-ENOTSUPP); + /* * Sanity check: if there's no task, * we should be the first user ... @@ -310,7 +331,7 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion) printk(KERN_WARNING "nfs_callback_create_svc: no kthread, %d users??\n", cb_info->users); - serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, &nfs_cb_sv_ops); + serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, sv_ops); if (!serv) { printk(KERN_ERR "nfs_callback_create_svc: create service failed\n"); return ERR_PTR(-ENOMEM); -- cgit v1.1