From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/nfs/client.c | 160 +++++++++++++++++++++++++++++++++++------------------
1 files changed, 105 insertions(+), 55 deletions(-)
diff --git a/kernel/fs/nfs/client.c b/kernel/fs/nfs/client.c
index 15049ef..818ff8b 100644
--- a/kernel/fs/nfs/client.c
+++ b/kernel/fs/nfs/client.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* client.c: NFS client sharing and management code
*
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
@@ -53,6 +49,8 @@
#include "pnfs.h"
#include "nfs.h"
#include "netns.h"
+#include "sysfs.h"
+#include "nfs42.h"
#define NFSDBG_FACILITY NFSDBG_CLIENT
@@ -151,7 +149,6 @@
struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
{
struct nfs_client *clp;
- struct rpc_cred *cred;
int err = -ENOMEM;
if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
@@ -182,11 +179,10 @@
clp->cl_flags = cl_init->init_flags;
clp->cl_proto = cl_init->proto;
+ clp->cl_nconnect = cl_init->nconnect;
clp->cl_net = get_net(cl_init->net);
- cred = rpc_lookup_machine_cred("*");
- if (!IS_ERR(cred))
- clp->cl_machine_cred = cred;
+ clp->cl_principal = "*";
nfs_fscache_get_client_cookie(clp);
return clp;
@@ -201,7 +197,7 @@
EXPORT_SYMBOL_GPL(nfs_alloc_client);
#if IS_ENABLED(CONFIG_NFS_V4)
-void nfs_cleanup_cb_ident_idr(struct net *net)
+static void nfs_cleanup_cb_ident_idr(struct net *net)
{
struct nfs_net *nn = net_generic(net, nfs_net_id);
@@ -223,7 +219,7 @@
}
#else
-void nfs_cleanup_cb_ident_idr(struct net *net)
+static void nfs_cleanup_cb_ident_idr(struct net *net)
{
}
@@ -247,9 +243,6 @@
/* -EIO all pending I/O */
if (!IS_ERR(clp->cl_rpcclient))
rpc_shutdown_client(clp->cl_rpcclient);
-
- if (clp->cl_machine_cred != NULL)
- put_rpccred(clp->cl_machine_cred);
put_net(clp->cl_net);
put_nfs_version(clp->cl_nfs_mod);
@@ -322,6 +315,12 @@
/* Match nfsv4 minorversion */
if (clp->cl_minorversion != data->minorversion)
continue;
+
+ /* Match request for a dedicated DS */
+ if (test_bit(NFS_CS_DS, &data->init_flags) !=
+ test_bit(NFS_CS_DS, &clp->cl_flags))
+ continue;
+
/* Match the full socket address */
if (!rpc_cmp_addr_port(sap, clap))
/* Match all xprt_switch full socket addresses */
@@ -477,6 +476,7 @@
to->to_maxval = to->to_initval;
to->to_exponential = 0;
break;
+#ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT
case XPRT_TRANSPORT_UDP:
if (retrans == NFS_UNSPEC_RETRANS)
to->to_retries = NFS_DEF_UDP_RETRANS;
@@ -487,6 +487,7 @@
to->to_maxval = NFS_MAX_UDP_TIMEOUT;
to->to_exponential = 1;
break;
+#endif
default:
BUG();
}
@@ -504,6 +505,7 @@
struct rpc_create_args args = {
.net = clp->cl_net,
.protocol = clp->cl_proto,
+ .nconnect = clp->cl_nconnect,
.address = (struct sockaddr *)&clp->cl_addr,
.addrsize = clp->cl_addrlen,
.timeout = cl_init->timeparms,
@@ -512,6 +514,7 @@
.program = &nfs_program,
.version = clp->rpc_ops->version,
.authflavor = flavor,
+ .cred = cl_init->cred,
};
if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
@@ -522,6 +525,10 @@
args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
+ if (test_bit(NFS_CS_NOPING, &clp->cl_flags))
+ args.flags |= RPC_CLNT_CREATE_NOPING;
+ if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags))
+ args.flags |= RPC_CLNT_CREATE_REUSEPORT;
if (!IS_ERR(clp->cl_rpcclient))
return 0;
@@ -533,6 +540,7 @@
return PTR_ERR(clnt);
}
+ clnt->cl_principal = clp->cl_principal;
clp->cl_rpcclient = clnt;
return 0;
}
@@ -563,6 +571,7 @@
1 : 0,
.net = clp->cl_net,
.nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
+ .cred = current_cred(),
};
if (nlm_init.nfs_version > 3)
@@ -575,8 +584,10 @@
default:
nlm_init.protocol = IPPROTO_TCP;
break;
+#ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT
case XPRT_TRANSPORT_UDP:
nlm_init.protocol = IPPROTO_UDP;
+#endif
}
host = nlmclnt_init(&nlm_init);
@@ -609,6 +620,8 @@
sizeof(server->client->cl_timeout_default));
server->client->cl_timeout = &server->client->cl_timeout_default;
server->client->cl_softrtry = 0;
+ if (server->flags & NFS_MOUNT_SOFTERR)
+ server->client->cl_softerr = 1;
if (server->flags & NFS_MOUNT_SOFT)
server->client->cl_softrtry = 1;
@@ -651,25 +664,28 @@
* Create a version 2 or 3 client
*/
static int nfs_init_server(struct nfs_server *server,
- const struct nfs_parsed_mount_data *data,
- struct nfs_subversion *nfs_mod)
+ const struct fs_context *fc)
{
+ const struct nfs_fs_context *ctx = nfs_fc2context(fc);
struct rpc_timeout timeparms;
struct nfs_client_initdata cl_init = {
- .hostname = data->nfs_server.hostname,
- .addr = (const struct sockaddr *)&data->nfs_server.address,
- .addrlen = data->nfs_server.addrlen,
- .nfs_mod = nfs_mod,
- .proto = data->nfs_server.protocol,
- .net = data->net,
+ .hostname = ctx->nfs_server.hostname,
+ .addr = (const struct sockaddr *)&ctx->nfs_server.address,
+ .addrlen = ctx->nfs_server.addrlen,
+ .nfs_mod = ctx->nfs_mod,
+ .proto = ctx->nfs_server.protocol,
+ .net = fc->net_ns,
.timeparms = &timeparms,
+ .cred = server->cred,
+ .nconnect = ctx->nfs_server.nconnect,
+ .init_flags = (1UL << NFS_CS_REUSEPORT),
};
struct nfs_client *clp;
int error;
- nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
- data->timeo, data->retrans);
- if (data->flags & NFS_MOUNT_NORESVPORT)
+ nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol,
+ ctx->timeo, ctx->retrans);
+ if (ctx->flags & NFS_MOUNT_NORESVPORT)
set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
/* Allocate or find a client reference we can use */
@@ -680,46 +696,46 @@
server->nfs_client = clp;
/* Initialise the client representation from the mount data */
- server->flags = data->flags;
- server->options = data->options;
+ server->flags = ctx->flags;
+ server->options = ctx->options;
server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
- if (data->rsize)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize)
- server->wsize = nfs_block_size(data->wsize, NULL);
+ if (ctx->rsize)
+ server->rsize = nfs_block_size(ctx->rsize, NULL);
+ if (ctx->wsize)
+ server->wsize = nfs_block_size(ctx->wsize, NULL);
- server->acregmin = data->acregmin * HZ;
- server->acregmax = data->acregmax * HZ;
- server->acdirmin = data->acdirmin * HZ;
- server->acdirmax = data->acdirmax * HZ;
+ server->acregmin = ctx->acregmin * HZ;
+ server->acregmax = ctx->acregmax * HZ;
+ server->acdirmin = ctx->acdirmin * HZ;
+ server->acdirmax = ctx->acdirmax * HZ;
/* Start lockd here, before we might error out */
error = nfs_start_lockd(server);
if (error < 0)
goto error;
- server->port = data->nfs_server.port;
- server->auth_info = data->auth_info;
+ server->port = ctx->nfs_server.port;
+ server->auth_info = ctx->auth_info;
error = nfs_init_server_rpcclient(server, &timeparms,
- data->selected_flavor);
+ ctx->selected_flavor);
if (error < 0)
goto error;
/* Preserve the values of mount_server-related mount options */
- if (data->mount_server.addrlen) {
- memcpy(&server->mountd_address, &data->mount_server.address,
- data->mount_server.addrlen);
- server->mountd_addrlen = data->mount_server.addrlen;
+ if (ctx->mount_server.addrlen) {
+ memcpy(&server->mountd_address, &ctx->mount_server.address,
+ ctx->mount_server.addrlen);
+ server->mountd_addrlen = ctx->mount_server.addrlen;
}
- server->mountd_version = data->mount_server.version;
- server->mountd_port = data->mount_server.port;
- server->mountd_protocol = data->mount_server.protocol;
+ server->mountd_version = ctx->mount_server.version;
+ server->mountd_port = ctx->mount_server.port;
+ server->mountd_protocol = ctx->mount_server.protocol;
- server->namelen = data->namlen;
+ server->namelen = ctx->namlen;
return 0;
error:
@@ -734,7 +750,7 @@
static void nfs_server_set_fsinfo(struct nfs_server *server,
struct nfs_fsinfo *fsinfo)
{
- unsigned long max_rpc_payload;
+ unsigned long max_rpc_payload, raw_max_rpc_payload;
/* Work out a lot of parameters */
if (server->rsize == 0)
@@ -747,7 +763,9 @@
if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
- max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
+ raw_max_rpc_payload = rpc_max_payload(server->client);
+ max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL);
+
if (server->rsize > max_rpc_payload)
server->rsize = max_rpc_payload;
if (server->rsize > NFS_MAX_FILE_IO_SIZE)
@@ -780,6 +798,21 @@
server->clone_blksize = fsinfo->clone_blksize;
/* We're airborne Set socket buffersize */
rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
+
+#ifdef CONFIG_NFS_V4_2
+ /*
+ * Defaults until limited by the session parameters.
+ */
+ server->gxasize = min_t(unsigned int, raw_max_rpc_payload,
+ XATTR_SIZE_MAX);
+ server->sxasize = min_t(unsigned int, raw_max_rpc_payload,
+ XATTR_SIZE_MAX);
+ server->lxasize = min_t(unsigned int, raw_max_rpc_payload,
+ nfs42_listxattr_xdrsize(XATTR_LIST_MAX));
+
+ if (fsinfo->xattr_support)
+ server->caps |= NFS_CAP_XATTR;
+#endif
}
/*
@@ -931,6 +964,7 @@
ida_destroy(&server->lockowner_id);
ida_destroy(&server->openowner_id);
nfs_free_iostats(server->io_stats);
+ put_cred(server->cred);
kfree(server);
nfs_release_automount_timer();
}
@@ -940,9 +974,9 @@
* Create a version 2 or 3 volume record
* - keyed on server and FSID
*/
-struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
- struct nfs_subversion *nfs_mod)
+struct nfs_server *nfs_create_server(struct fs_context *fc)
{
+ struct nfs_fs_context *ctx = nfs_fc2context(fc);
struct nfs_server *server;
struct nfs_fattr *fattr;
int error;
@@ -951,24 +985,26 @@
if (!server)
return ERR_PTR(-ENOMEM);
+ server->cred = get_cred(current_cred());
+
error = -ENOMEM;
fattr = nfs_alloc_fattr();
if (fattr == NULL)
goto error;
/* Get a client representation */
- error = nfs_init_server(server, mount_info->parsed, nfs_mod);
+ error = nfs_init_server(server, fc);
if (error < 0)
goto error;
/* Probe the root fh to retrieve its FSID */
- error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr);
+ error = nfs_probe_fsinfo(server, ctx->mntfh, fattr);
if (error < 0)
goto error;
if (server->nfs_client->rpc_ops->version == 3) {
if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
server->namelen = NFS3_MAXNAMLEN;
- if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS))
+ if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS))
server->caps |= NFS_CAP_READDIRPLUS;
} else {
if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
@@ -976,8 +1012,8 @@
}
if (!(fattr->valid & NFS_ATTR_FATTR)) {
- error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh,
- fattr, NULL, NULL);
+ error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh,
+ fattr, NULL, NULL);
if (error < 0) {
dprintk("nfs_create_server: getattr error = %d\n", -error);
goto error;
@@ -1016,6 +1052,8 @@
server = nfs_alloc_server();
if (!server)
return ERR_PTR(-ENOMEM);
+
+ server->cred = get_cred(source->cred);
error = -ENOMEM;
fattr_fsinfo = nfs_alloc_fattr();
@@ -1072,6 +1110,18 @@
#endif
spin_lock_init(&nn->nfs_client_lock);
nn->boot_time = ktime_get_real();
+
+ nfs_netns_sysfs_setup(nn, net);
+}
+
+void nfs_clients_exit(struct net *net)
+{
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+
+ nfs_netns_sysfs_destroy(nn);
+ nfs_cleanup_cb_ident_idr(net);
+ WARN_ON_ONCE(!list_empty(&nn->nfs_client_list));
+ WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list));
}
#ifdef CONFIG_PROC_FS
--
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