mirror of
https://github.com/torvalds/linux
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b326df4a8e
It appears that in certain cases, RDMA capable transports can benefit from the ability to establish multiple connections to increase their throughput. This patch therefore enables the use of the "nconnect" mount option for those use cases. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/nfs_fs.h>
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#include <linux/nfs_mount.h>
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#include <linux/sunrpc/addr.h>
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#include "internal.h"
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#include "nfs3_fs.h"
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#include "netns.h"
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#include "sysfs.h"
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#ifdef CONFIG_NFS_V3_ACL
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static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
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static const struct rpc_version *nfsacl_version[] = {
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[3] = &nfsacl_version3,
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};
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const struct rpc_program nfsacl_program = {
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.name = "nfsacl",
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.number = NFS_ACL_PROGRAM,
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.nrvers = ARRAY_SIZE(nfsacl_version),
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.version = nfsacl_version,
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.stats = &nfsacl_rpcstat,
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};
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/*
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* Initialise an NFSv3 ACL client connection
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*/
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static void nfs_init_server_aclclient(struct nfs_server *server)
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{
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if (server->flags & NFS_MOUNT_NOACL)
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goto out_noacl;
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server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
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if (IS_ERR(server->client_acl))
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goto out_noacl;
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nfs_sysfs_link_rpc_client(server, server->client_acl, NULL);
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/* No errors! Assume that Sun nfsacls are supported */
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server->caps |= NFS_CAP_ACLS;
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return;
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out_noacl:
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server->caps &= ~NFS_CAP_ACLS;
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}
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#else
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static inline void nfs_init_server_aclclient(struct nfs_server *server)
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{
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server->flags &= ~NFS_MOUNT_NOACL;
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server->caps &= ~NFS_CAP_ACLS;
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}
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#endif
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struct nfs_server *nfs3_create_server(struct fs_context *fc)
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{
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struct nfs_server *server = nfs_create_server(fc);
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/* Create a client RPC handle for the NFS v3 ACL management interface */
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if (!IS_ERR(server))
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nfs_init_server_aclclient(server);
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return server;
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}
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struct nfs_server *nfs3_clone_server(struct nfs_server *source,
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struct nfs_fh *fh,
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struct nfs_fattr *fattr,
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rpc_authflavor_t flavor)
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{
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struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor);
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if (!IS_ERR(server) && !IS_ERR(source->client_acl))
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nfs_init_server_aclclient(server);
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return server;
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}
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/*
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* Set up a pNFS Data Server client over NFSv3.
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*
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* Return any existing nfs_client that matches server address,port,version
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* and minorversion.
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*
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* For a new nfs_client, use a soft mount (default), a low retrans and a
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* low timeout interval so that if a connection is lost, we retry through
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* the MDS.
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*/
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struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
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const struct sockaddr_storage *ds_addr, int ds_addrlen,
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int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
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{
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struct rpc_timeout ds_timeout;
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unsigned long connect_timeout = ds_timeo * (ds_retrans + 1) * HZ / 10;
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struct nfs_client *mds_clp = mds_srv->nfs_client;
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struct nfs_client_initdata cl_init = {
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.addr = ds_addr,
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.addrlen = ds_addrlen,
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.nodename = mds_clp->cl_rpcclient->cl_nodename,
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.ip_addr = mds_clp->cl_ipaddr,
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.nfs_mod = &nfs_v3,
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.proto = ds_proto,
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.net = mds_clp->cl_net,
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.timeparms = &ds_timeout,
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.cred = mds_srv->cred,
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.xprtsec = mds_clp->cl_xprtsec,
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.connect_timeout = connect_timeout,
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.reconnect_timeout = connect_timeout,
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};
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struct nfs_client *clp;
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char buf[INET6_ADDRSTRLEN + 1];
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/* fake a hostname because lockd wants it */
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if (rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf)) <= 0)
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return ERR_PTR(-EINVAL);
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cl_init.hostname = buf;
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switch (ds_proto) {
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case XPRT_TRANSPORT_RDMA:
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case XPRT_TRANSPORT_TCP:
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case XPRT_TRANSPORT_TCP_TLS:
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if (mds_clp->cl_nconnect > 1)
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cl_init.nconnect = mds_clp->cl_nconnect;
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}
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if (mds_srv->flags & NFS_MOUNT_NORESVPORT)
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__set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
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__set_bit(NFS_CS_DS, &cl_init.init_flags);
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/* Use the MDS nfs_client cl_ipaddr. */
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nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
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clp = nfs_get_client(&cl_init);
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return clp;
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}
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EXPORT_SYMBOL_GPL(nfs3_set_ds_client);
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