NFSD add nfs4 inter ssc to nfsd4_copy (ce0887ac) · Commits · EulixOS / Software / Kernel

fs/nfsd/nfs4proc.c

+271 −22

Original line number	Diff line number	Diff line
		@@ -1144,6 +1144,208 @@ void nfsd4_shutdown_copy(struct nfs4_client *clp)
		while ((copy = nfsd4_get_copy(clp)) != NULL)
		nfsd4_stop_copy(copy);
		}
		#ifdef CONFIG_NFSD_V4_2_INTER_SSC

		extern struct file nfs42_ssc_open(struct vfsmount ss_mnt,
		struct nfs_fh *src_fh,
		nfs4_stateid *stateid);
		extern void nfs42_ssc_close(struct file *filep);

		extern void nfs_sb_deactive(struct super_block *sb);

		#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"

		/**
		* Support one copy source server for now.
		*/
		static __be32
		nfsd4_interssc_connect(struct nl4_server nss, struct svc_rqst rqstp,
		struct vfsmount **mount)
		{
		struct file_system_type *type;
		struct vfsmount *ss_mnt;
		struct nfs42_netaddr *naddr;
		struct sockaddr_storage tmp_addr;
		size_t tmp_addrlen, match_netid_len = 3;
		char startsep = "", endsep = "", *match_netid = "tcp";
		char ipaddr, dev_name, *raw_data;
		int len, raw_len, status = -EINVAL;

		naddr = &nss->u.nl4_addr;
		tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
		naddr->addr_len,
		(struct sockaddr *)&tmp_addr,
		sizeof(tmp_addr));
		if (tmp_addrlen == 0)
		goto out_err;

		if (tmp_addr.ss_family == AF_INET6) {
		startsep = "[";
		endsep = "]";
		match_netid = "tcp6";
		match_netid_len = 4;
		}

		if (naddr->netid_len != match_netid_len \|\|
		strncmp(naddr->netid, match_netid, naddr->netid_len))
		goto out_err;

		/* Construct the raw data for the vfs_kern_mount call */
		len = RPC_MAX_ADDRBUFLEN + 1;
		ipaddr = kzalloc(len, GFP_KERNEL);
		if (!ipaddr)
		goto out_err;

		rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);

		/* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/

		raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
		raw_data = kzalloc(raw_len, GFP_KERNEL);
		if (!raw_data)
		goto out_free_ipaddr;

		snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);

		status = -ENODEV;
		type = get_fs_type("nfs");
		if (!type)
		goto out_free_rawdata;

		/* Set the server:<export> for the vfs_kern_mount call */
		dev_name = kzalloc(len + 5, GFP_KERNEL);
		if (!dev_name)
		goto out_free_rawdata;
		snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);

		/* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
		ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
		module_put(type->owner);
		if (IS_ERR(ss_mnt))
		goto out_free_devname;

		status = 0;
		*mount = ss_mnt;

		out_free_devname:
		kfree(dev_name);
		out_free_rawdata:
		kfree(raw_data);
		out_free_ipaddr:
		kfree(ipaddr);
		out_err:
		return status;
		}

		static void
		nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
		{
		nfs_sb_deactive(ss_mnt->mnt_sb);
		mntput(ss_mnt);
		}

		/**
		* nfsd4_setup_inter_ssc
		*
		* Verify COPY destination stateid.
		* Connect to the source server with NFSv4.1.
		* Create the source struct file for nfsd_copy_range.
		* Called with COPY cstate:
		* SAVED_FH: source filehandle
		* CURRENT_FH: destination filehandle
		*
		* Returns errno (not nfserrxxx)
		*/
		static __be32
		nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
		struct nfsd4_compound_state *cstate,
		struct nfsd4_copy copy, struct vfsmount *mount)
		{
		struct svc_fh *s_fh = NULL;
		stateid_t *s_stid = &copy->cp_src_stateid;
		__be32 status = -EINVAL;

		/* Verify the destination stateid and set dst struct file*/
		status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
		&copy->cp_dst_stateid,
		WR_STATE, &copy->nf_dst, NULL);
		if (status)
		goto out;

		status = nfsd4_interssc_connect(&copy->cp_src, rqstp, mount);
		if (status)
		goto out;

		s_fh = &cstate->save_fh;

		copy->c_fh.size = s_fh->fh_handle.fh_size;
		memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
		copy->stateid.seqid = s_stid->si_generation;
		memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
		sizeof(stateid_opaque_t));

		status = 0;
		out:
		return status;
		}

		static void
		nfsd4_cleanup_inter_ssc(struct vfsmount ss_mnt, struct nfsd_file src,
		struct nfsd_file *dst)
		{
		nfs42_ssc_close(src->nf_file);
		nfsd_file_put(src);
		nfsd_file_put(dst);
		mntput(ss_mnt);
		}

		#else /* CONFIG_NFSD_V4_2_INTER_SSC */

		static __be32
		nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
		struct nfsd4_compound_state *cstate,
		struct nfsd4_copy *copy,
		struct vfsmount **mount)
		{
		*mount = NULL;
		return -EINVAL;
		}

		static void
		nfsd4_cleanup_inter_ssc(struct vfsmount ss_mnt, struct nfsd_file src,
		struct nfsd_file *dst)
		{
		}

		static void
		nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
		{
		}

		static struct file nfs42_ssc_open(struct vfsmount ss_mnt,
		struct nfs_fh *src_fh,
		nfs4_stateid *stateid)
		{
		return NULL;
		}
		#endif /* CONFIG_NFSD_V4_2_INTER_SSC */

		static __be32
		nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
		struct nfsd4_compound_state *cstate,
		struct nfsd4_copy *copy)
		{
		return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
		&copy->nf_src, &copy->cp_dst_stateid,
		&copy->nf_dst);
		}

		static void
		nfsd4_cleanup_intra_ssc(struct nfsd_file src, struct nfsd_file dst)
		{
		nfsd_file_put(src);
		nfsd_file_put(dst);
		}

		static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
		{
		@@ -1209,12 +1411,16 @@ static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
		status = nfs_ok;
		}

		nfsd_file_put(copy->nf_src);
		nfsd_file_put(copy->nf_dst);
		if (!copy->cp_intra) /* Inter server SSC */
		nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
		copy->nf_dst);
		else
		nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);

		return status;
		}

		static void dup_copy_fields(struct nfsd4_copy src, struct nfsd4_copy dst)
		static int dup_copy_fields(struct nfsd4_copy src, struct nfsd4_copy dst)
		{
		dst->cp_src_pos = src->cp_src_pos;
		dst->cp_dst_pos = src->cp_dst_pos;
		@@ -1224,8 +1430,17 @@ static void dup_copy_fields(struct nfsd4_copy src, struct nfsd4_copy dst)
		memcpy(&dst->fh, &src->fh, sizeof(src->fh));
		dst->cp_clp = src->cp_clp;
		dst->nf_dst = nfsd_file_get(src->nf_dst);
		dst->cp_intra = src->cp_intra;
		if (src->cp_intra) /* for inter, file_src doesn't exist yet */
		dst->nf_src = nfsd_file_get(src->nf_src);

		memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
		memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
		memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
		memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
		dst->ss_mnt = src->ss_mnt;

		return 0;
		}

		static void cleanup_async_copy(struct nfsd4_copy *copy)
		@@ -1244,7 +1459,25 @@ static int nfsd4_do_async_copy(void *data)
		struct nfsd4_copy copy = (struct nfsd4_copy )data;
		struct nfsd4_copy *cb_copy;

		if (!copy->cp_intra) { /* Inter server SSC */
		copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
		if (!copy->nf_src) {
		copy->nfserr = nfserr_serverfault;
		nfsd4_interssc_disconnect(copy->ss_mnt);
		goto do_callback;
		}
		copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh,
		&copy->stateid);
		if (IS_ERR(copy->nf_src->nf_file)) {
		kfree(copy->nf_src);
		copy->nfserr = nfserr_offload_denied;
		nfsd4_interssc_disconnect(copy->ss_mnt);
		goto do_callback;
		}
		}

		copy->nfserr = nfsd4_do_copy(copy, 0);
		do_callback:
		cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
		if (!cb_copy)
		goto out;
		@@ -1256,6 +1489,8 @@ static int nfsd4_do_async_copy(void *data)
		&nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
		nfsd4_run_cb(&cb_copy->cp_cb);
		out:
		if (!copy->cp_intra)
		kfree(copy->nf_src);
		cleanup_async_copy(copy);
		return 0;
		}
		@@ -1268,11 +1503,20 @@ nfsd4_copy(struct svc_rqst rqstp, struct nfsd4_compound_state cstate,
		__be32 status;
		struct nfsd4_copy *async_copy = NULL;

		status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
		&copy->nf_src, &copy->cp_dst_stateid,
		&copy->nf_dst);
		if (status)
		if (!copy->cp_intra) { /* Inter server SSC */
		if (!inter_copy_offload_enable \|\| copy->cp_synchronous) {
		status = nfserr_notsupp;
		goto out;
		}
		status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
		&copy->ss_mnt);
		if (status)
		return nfserr_offload_denied;
		} else {
		status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
		if (status)
		return status;
		}

		copy->cp_clp = cstate->clp;
		memcpy(&copy->fh, &cstate->current_fh.fh_handle,
		@@ -1283,15 +1527,15 @@ nfsd4_copy(struct svc_rqst rqstp, struct nfsd4_compound_state cstate,
		status = nfserrno(-ENOMEM);
		async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
		if (!async_copy)
		goto out;
		if (!nfs4_init_copy_state(nn, copy)) {
		kfree(async_copy);
		goto out;
		}
		goto out_err;
		if (!nfs4_init_copy_state(nn, copy))
		goto out_err;
		refcount_set(&async_copy->refcount, 1);
		memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
		sizeof(copy->cp_stateid));
		dup_copy_fields(copy, async_copy);
		status = dup_copy_fields(copy, async_copy);
		if (status)
		goto out_err;
		async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
		async_copy, "%s", "copy thread");
		if (IS_ERR(async_copy->copy_task))
		@@ -1302,13 +1546,17 @@ nfsd4_copy(struct svc_rqst rqstp, struct nfsd4_compound_state cstate,
		spin_unlock(&async_copy->cp_clp->async_lock);
		wake_up_process(async_copy->copy_task);
		status = nfs_ok;
		} else
		} else {
		status = nfsd4_do_copy(copy, 1);
		}
		out:
		return status;
		out_err:
		if (async_copy)
		cleanup_async_copy(async_copy);
		status = nfserrno(-ENOMEM);
		if (!copy->cp_intra)
		nfsd4_interssc_disconnect(copy->ss_mnt);
		goto out;
		}

		@@ -1319,7 +1567,7 @@ find_async_copy(struct nfs4_client clp, stateid_t stateid)

		spin_lock(&clp->async_lock);
		list_for_each_entry(copy, &clp->async_copies, copies) {
		if (memcmp(&copy->cp_stateid, stateid, NFS4_STATEID_SIZE))
		if (memcmp(&copy->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
		continue;
		refcount_inc(&copy->refcount);
		spin_unlock(&clp->async_lock);
		@@ -1335,17 +1583,18 @@ nfsd4_offload_cancel(struct svc_rqst *rqstp,
		union nfsd4_op_u *u)
		{
		struct nfsd4_offload_status *os = &u->offload_status;
		__be32 status = 0;
		struct nfsd4_copy *copy;
		struct nfs4_client *clp = cstate->clp;

		copy = find_async_copy(clp, &os->stateid);
		if (copy)
		if (!copy) {
		struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);

		return manage_cpntf_state(nn, &os->stateid, clp, NULL);
		} else
		nfsd4_stop_copy(copy);
		else
		status = nfserr_bad_stateid;

		return status;
		return nfs_ok;
		}

		static __be32

fs/nfsd/nfs4state.c

+10 −5

Original line number	Diff line number	Diff line
		@@ -5681,7 +5681,8 @@ _free_cpntf_state_locked(struct nfsd_net nn, struct nfs4_cpntf_state cps)
		* copy stateid. Look up the copy notify stateid from the
		* idr structure and take a reference on it.
		*/
		static __be32 _find_cpntf_state(struct nfsd_net nn, stateid_t st,
		__be32 manage_cpntf_state(struct nfsd_net nn, stateid_t st,
		struct nfs4_client *clp,
		struct nfs4_cpntf_state **cps)
		{
		copy_stateid_t *cps_t;
		@@ -5696,11 +5697,15 @@ static __be32 _find_cpntf_state(struct nfsd_net nn, stateid_t st,
		cp_stateid);
		if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID)
		return nfserr_bad_stateid;
		if (!clp)
		refcount_inc(&state->cp_stateid.sc_count);
		else
		_free_cpntf_state_locked(nn, state);
		}
		spin_unlock(&nn->s2s_cp_lock);
		if (!state)
		return nfserr_bad_stateid;
		if (!clp && state)
		*cps = state;
		return 0;
		}
		@@ -5712,7 +5717,7 @@ static __be32 find_cpntf_state(struct nfsd_net nn, stateid_t st,
		struct nfs4_cpntf_state *cps = NULL;
		struct nfsd4_compound_state cstate;

		status = _find_cpntf_state(nn, st, &cps);
		status = manage_cpntf_state(nn, st, NULL, &cps);
		if (status)
		return status;

fs/nfsd/nfssvc.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -31,6 +31,12 @@

		#define NFSDDBG_FACILITY NFSDDBG_SVC

		bool inter_copy_offload_enable;
		EXPORT_SYMBOL_GPL(inter_copy_offload_enable);
		module_param(inter_copy_offload_enable, bool, 0644);
		MODULE_PARM_DESC(inter_copy_offload_enable,
		"Enable inter server to server copy offload. Default: false");

		extern struct svc_program nfsd_program;
		static int nfsd(void *vrqstp);
		#if defined(CONFIG_NFSD_V2_ACL) \|\| defined(CONFIG_NFSD_V3_ACL)

fs/nfsd/state.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -680,6 +680,9 @@ extern struct nfsd4_copy *
		find_async_copy(struct nfs4_client clp, stateid_t staetid);
		extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
		struct nfs4_cpntf_state *cps);
		extern __be32 manage_cpntf_state(struct nfsd_net nn, stateid_t st,
		struct nfs4_client *clp,
		struct nfs4_cpntf_state **cps);
		static inline void get_nfs4_file(struct nfs4_file *fi)
		{
		refcount_inc(&fi->fi_ref);

fs/nfsd/xdr4.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -549,7 +549,12 @@ struct nfsd4_copy {
		struct task_struct *copy_task;
		refcount_t refcount;
		bool stopped;

		struct vfsmount *ss_mnt;
		struct nfs_fh c_fh;
		nfs4_stateid stateid;
		};
		extern bool inter_copy_offload_enable;

		struct nfsd4_seek {
		/* request */