7c6c5249f0
With two clients, each with NFSv3 mounts of the same directory, the sequence:
client1 client2
ls -l afile
echo hello there > afile
echo HELLO > afile
cat afile
will show
HELLO
there
because the O_TRUNC requested in the final 'echo' doesn't take effect.
This is because the "Negative dentry, just create a file" section in
lookup_open() assumes that the file *does* get created since the dentry
was negative, so it sets FMODE_CREATED, and this causes do_open() to
clear O_TRUNC and so the file doesn't get truncated.
Even mounting with -o lookupcache=none does not help as
nfs_neg_need_reval() always returns false if LOOKUP_CREATE is set.
This patch fixes the problem by providing an atomic_open inode operation
for NFSv3 (and v2). The code is largely the code from the branch in
lookup_open() when atomic_open is not provided. The significant change
is that the O_TRUNC flag is passed a new nfs_do_create() which add
'trunc' handling to nfs_create().
With this change we also optimise away an unnecessary LOOKUP before the
file is created.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
1071 lines
26 KiB
C
1071 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/nfs/nfs3proc.c
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*
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* Client-side NFSv3 procedures stubs.
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*
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* Copyright (C) 1997, Olaf Kirch
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*/
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/slab.h>
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#include <linux/nfs.h>
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#include <linux/nfs3.h>
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#include <linux/nfs_fs.h>
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#include <linux/nfs_page.h>
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#include <linux/lockd/bind.h>
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#include <linux/nfs_mount.h>
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#include <linux/freezer.h>
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#include <linux/xattr.h>
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#include "iostat.h"
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#include "internal.h"
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#include "nfs3_fs.h"
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#define NFSDBG_FACILITY NFSDBG_PROC
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/* A wrapper to handle the EJUKEBOX error messages */
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static int
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nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
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{
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int res;
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do {
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res = rpc_call_sync(clnt, msg, flags);
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if (res != -EJUKEBOX)
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break;
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__set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
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schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
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res = -ERESTARTSYS;
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} while (!fatal_signal_pending(current));
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return res;
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}
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#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
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static int
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nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
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{
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if (task->tk_status != -EJUKEBOX)
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return 0;
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nfs_inc_stats(inode, NFSIOS_DELAY);
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task->tk_status = 0;
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rpc_restart_call(task);
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rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
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return 1;
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}
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static int
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do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
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struct nfs_fsinfo *info)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
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.rpc_argp = fhandle,
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.rpc_resp = info,
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};
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int status;
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dprintk("%s: call fsinfo\n", __func__);
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nfs_fattr_init(info->fattr);
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status = rpc_call_sync(client, &msg, 0);
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dprintk("%s: reply fsinfo: %d\n", __func__, status);
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if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
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msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
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msg.rpc_resp = info->fattr;
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status = rpc_call_sync(client, &msg, 0);
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dprintk("%s: reply getattr: %d\n", __func__, status);
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}
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return status;
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}
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/*
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* Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
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*/
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static int
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nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
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struct nfs_fsinfo *info)
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{
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int status;
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status = do_proc_get_root(server->client, fhandle, info);
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if (status && server->nfs_client->cl_rpcclient != server->client)
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status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
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return status;
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}
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/*
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* One function for each procedure in the NFS protocol.
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*/
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static int
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nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
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struct nfs_fattr *fattr, struct inode *inode)
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{
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struct rpc_message msg = {
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.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
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.rpc_argp = fhandle,
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.rpc_resp = fattr,
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};
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int status;
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unsigned short task_flags = 0;
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/* Is this is an attribute revalidation, subject to softreval? */
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if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
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task_flags |= RPC_TASK_TIMEOUT;
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dprintk("NFS call getattr\n");
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nfs_fattr_init(fattr);
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status = rpc_call_sync(server->client, &msg, task_flags);
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dprintk("NFS reply getattr: %d\n", status);
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return status;
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}
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static int
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nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
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struct iattr *sattr)
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{
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struct inode *inode = d_inode(dentry);
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struct nfs3_sattrargs arg = {
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.fh = NFS_FH(inode),
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.sattr = sattr,
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};
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struct rpc_message msg = {
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.rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
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.rpc_argp = &arg,
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.rpc_resp = fattr,
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};
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int status;
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dprintk("NFS call setattr\n");
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if (sattr->ia_valid & ATTR_FILE)
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msg.rpc_cred = nfs_file_cred(sattr->ia_file);
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nfs_fattr_init(fattr);
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status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
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if (status == 0) {
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nfs_setattr_update_inode(inode, sattr, fattr);
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if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
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nfs_zap_acl_cache(inode);
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}
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dprintk("NFS reply setattr: %d\n", status);
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return status;
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}
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static int
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__nfs3_proc_lookup(struct inode *dir, const char *name, size_t len,
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struct nfs_fh *fhandle, struct nfs_fattr *fattr,
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unsigned short task_flags)
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{
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struct nfs3_diropargs arg = {
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.fh = NFS_FH(dir),
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.name = name,
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.len = len
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};
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struct nfs3_diropres res = {
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.fh = fhandle,
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.fattr = fattr
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};
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struct rpc_message msg = {
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.rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
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.rpc_argp = &arg,
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.rpc_resp = &res,
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};
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int status;
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res.dir_attr = nfs_alloc_fattr();
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if (res.dir_attr == NULL)
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return -ENOMEM;
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nfs_fattr_init(fattr);
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status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags);
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nfs_refresh_inode(dir, res.dir_attr);
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if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
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msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
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msg.rpc_argp = fhandle;
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msg.rpc_resp = fattr;
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status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags);
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}
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nfs_free_fattr(res.dir_attr);
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dprintk("NFS reply lookup: %d\n", status);
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return status;
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}
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static int
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nfs3_proc_lookup(struct inode *dir, struct dentry *dentry,
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struct nfs_fh *fhandle, struct nfs_fattr *fattr)
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{
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unsigned short task_flags = 0;
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/* Is this is an attribute revalidation, subject to softreval? */
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if (nfs_lookup_is_soft_revalidate(dentry))
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task_flags |= RPC_TASK_TIMEOUT;
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dprintk("NFS call lookup %pd2\n", dentry);
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return __nfs3_proc_lookup(dir, dentry->d_name.name,
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dentry->d_name.len, fhandle, fattr,
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task_flags);
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}
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static int nfs3_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
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struct nfs_fattr *fattr)
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{
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const char dotdot[] = "..";
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const size_t len = strlen(dotdot);
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unsigned short task_flags = 0;
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if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
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task_flags |= RPC_TASK_TIMEOUT;
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return __nfs3_proc_lookup(inode, dotdot, len, fhandle, fattr,
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task_flags);
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}
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static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry,
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const struct cred *cred)
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{
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struct nfs3_accessargs arg = {
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.fh = NFS_FH(inode),
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.access = entry->mask,
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};
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struct nfs3_accessres res;
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struct rpc_message msg = {
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.rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
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.rpc_argp = &arg,
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.rpc_resp = &res,
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.rpc_cred = cred,
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};
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int status = -ENOMEM;
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dprintk("NFS call access\n");
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res.fattr = nfs_alloc_fattr();
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if (res.fattr == NULL)
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goto out;
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status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
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nfs_refresh_inode(inode, res.fattr);
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if (status == 0)
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nfs_access_set_mask(entry, res.access);
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nfs_free_fattr(res.fattr);
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out:
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dprintk("NFS reply access: %d\n", status);
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return status;
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}
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static int nfs3_proc_readlink(struct inode *inode, struct page *page,
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unsigned int pgbase, unsigned int pglen)
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{
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struct nfs_fattr *fattr;
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struct nfs3_readlinkargs args = {
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.fh = NFS_FH(inode),
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.pgbase = pgbase,
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.pglen = pglen,
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.pages = &page
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};
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struct rpc_message msg = {
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.rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
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.rpc_argp = &args,
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};
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int status = -ENOMEM;
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dprintk("NFS call readlink\n");
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fattr = nfs_alloc_fattr();
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if (fattr == NULL)
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goto out;
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msg.rpc_resp = fattr;
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status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
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nfs_refresh_inode(inode, fattr);
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nfs_free_fattr(fattr);
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out:
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dprintk("NFS reply readlink: %d\n", status);
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return status;
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}
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struct nfs3_createdata {
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struct rpc_message msg;
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union {
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struct nfs3_createargs create;
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struct nfs3_mkdirargs mkdir;
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struct nfs3_symlinkargs symlink;
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struct nfs3_mknodargs mknod;
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} arg;
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struct nfs3_diropres res;
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struct nfs_fh fh;
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struct nfs_fattr fattr;
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struct nfs_fattr dir_attr;
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};
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static struct nfs3_createdata *nfs3_alloc_createdata(void)
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{
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struct nfs3_createdata *data;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (data != NULL) {
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data->msg.rpc_argp = &data->arg;
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data->msg.rpc_resp = &data->res;
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data->res.fh = &data->fh;
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data->res.fattr = &data->fattr;
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data->res.dir_attr = &data->dir_attr;
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nfs_fattr_init(data->res.fattr);
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nfs_fattr_init(data->res.dir_attr);
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}
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return data;
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}
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static struct dentry *
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nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
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{
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int status;
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status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
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nfs_post_op_update_inode(dir, data->res.dir_attr);
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if (status != 0)
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return ERR_PTR(status);
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return nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr);
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}
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static void nfs3_free_createdata(struct nfs3_createdata *data)
|
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{
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kfree(data);
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|
}
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|
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/*
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* Create a regular file.
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*/
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static int
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nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
|
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int flags)
|
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{
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struct posix_acl *default_acl, *acl;
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struct nfs3_createdata *data;
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struct dentry *d_alias;
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int status = -ENOMEM;
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dprintk("NFS call create %pd\n", dentry);
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data = nfs3_alloc_createdata();
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if (data == NULL)
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goto out;
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|
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data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
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data->arg.create.fh = NFS_FH(dir);
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data->arg.create.name = dentry->d_name.name;
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data->arg.create.len = dentry->d_name.len;
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data->arg.create.sattr = sattr;
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data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
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if (flags & O_EXCL) {
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data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
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data->arg.create.verifier[0] = cpu_to_be32(jiffies);
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data->arg.create.verifier[1] = cpu_to_be32(current->pid);
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}
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status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
|
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if (status)
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goto out;
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|
|
|
for (;;) {
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d_alias = nfs3_do_create(dir, dentry, data);
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status = PTR_ERR_OR_ZERO(d_alias);
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|
|
if (status != -ENOTSUPP)
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break;
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/* If the server doesn't support the exclusive creation
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* semantics, try again with simple 'guarded' mode. */
|
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switch (data->arg.create.createmode) {
|
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case NFS3_CREATE_EXCLUSIVE:
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data->arg.create.createmode = NFS3_CREATE_GUARDED;
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break;
|
|
|
|
case NFS3_CREATE_GUARDED:
|
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data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
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break;
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|
|
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case NFS3_CREATE_UNCHECKED:
|
|
goto out_release_acls;
|
|
}
|
|
nfs_fattr_init(data->res.dir_attr);
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|
nfs_fattr_init(data->res.fattr);
|
|
}
|
|
|
|
if (status != 0)
|
|
goto out_release_acls;
|
|
|
|
if (d_alias)
|
|
dentry = d_alias;
|
|
|
|
/* When we created the file with exclusive semantics, make
|
|
* sure we set the attributes afterwards. */
|
|
if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
|
|
dprintk("NFS call setattr (post-create)\n");
|
|
|
|
if (!(sattr->ia_valid & ATTR_ATIME_SET))
|
|
sattr->ia_valid |= ATTR_ATIME;
|
|
if (!(sattr->ia_valid & ATTR_MTIME_SET))
|
|
sattr->ia_valid |= ATTR_MTIME;
|
|
|
|
/* Note: we could use a guarded setattr here, but I'm
|
|
* not sure this buys us anything (and I'd have
|
|
* to revamp the NFSv3 XDR code) */
|
|
status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
|
|
nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
|
|
dprintk("NFS reply setattr (post-create): %d\n", status);
|
|
if (status != 0)
|
|
goto out_dput;
|
|
}
|
|
|
|
status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
|
|
|
|
out_dput:
|
|
dput(d_alias);
|
|
out_release_acls:
|
|
posix_acl_release(acl);
|
|
posix_acl_release(default_acl);
|
|
out:
|
|
nfs3_free_createdata(data);
|
|
dprintk("NFS reply create: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_remove(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct nfs_removeargs arg = {
|
|
.fh = NFS_FH(dir),
|
|
.name = dentry->d_name,
|
|
};
|
|
struct nfs_removeres res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
dprintk("NFS call remove %pd2\n", dentry);
|
|
res.dir_attr = nfs_alloc_fattr();
|
|
if (res.dir_attr == NULL)
|
|
goto out;
|
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
nfs_post_op_update_inode(dir, res.dir_attr);
|
|
nfs_free_fattr(res.dir_attr);
|
|
out:
|
|
dprintk("NFS reply remove: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static void
|
|
nfs3_proc_unlink_setup(struct rpc_message *msg,
|
|
struct dentry *dentry,
|
|
struct inode *inode)
|
|
{
|
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
|
|
}
|
|
|
|
static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
|
|
{
|
|
rpc_call_start(task);
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
|
|
{
|
|
struct nfs_removeres *res;
|
|
if (nfs3_async_handle_jukebox(task, dir))
|
|
return 0;
|
|
res = task->tk_msg.rpc_resp;
|
|
nfs_post_op_update_inode(dir, res->dir_attr);
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
nfs3_proc_rename_setup(struct rpc_message *msg,
|
|
struct dentry *old_dentry,
|
|
struct dentry *new_dentry)
|
|
{
|
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
|
|
}
|
|
|
|
static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
|
|
{
|
|
rpc_call_start(task);
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
|
|
struct inode *new_dir)
|
|
{
|
|
struct nfs_renameres *res;
|
|
|
|
if (nfs3_async_handle_jukebox(task, old_dir))
|
|
return 0;
|
|
res = task->tk_msg.rpc_resp;
|
|
|
|
nfs_post_op_update_inode(old_dir, res->old_fattr);
|
|
nfs_post_op_update_inode(new_dir, res->new_fattr);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
|
|
{
|
|
struct nfs3_linkargs arg = {
|
|
.fromfh = NFS_FH(inode),
|
|
.tofh = NFS_FH(dir),
|
|
.toname = name->name,
|
|
.tolen = name->len
|
|
};
|
|
struct nfs3_linkres res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
dprintk("NFS call link %s\n", name->name);
|
|
res.fattr = nfs_alloc_fattr();
|
|
res.dir_attr = nfs_alloc_fattr();
|
|
if (res.fattr == NULL || res.dir_attr == NULL)
|
|
goto out;
|
|
|
|
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
|
|
nfs_post_op_update_inode(dir, res.dir_attr);
|
|
nfs_post_op_update_inode(inode, res.fattr);
|
|
out:
|
|
nfs_free_fattr(res.dir_attr);
|
|
nfs_free_fattr(res.fattr);
|
|
dprintk("NFS reply link: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct folio *folio,
|
|
unsigned int len, struct iattr *sattr)
|
|
{
|
|
struct page *page = &folio->page;
|
|
struct nfs3_createdata *data;
|
|
struct dentry *d_alias;
|
|
int status = -ENOMEM;
|
|
|
|
if (len > NFS3_MAXPATHLEN)
|
|
return -ENAMETOOLONG;
|
|
|
|
dprintk("NFS call symlink %pd\n", dentry);
|
|
|
|
data = nfs3_alloc_createdata();
|
|
if (data == NULL)
|
|
goto out;
|
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
|
|
data->arg.symlink.fromfh = NFS_FH(dir);
|
|
data->arg.symlink.fromname = dentry->d_name.name;
|
|
data->arg.symlink.fromlen = dentry->d_name.len;
|
|
data->arg.symlink.pages = &page;
|
|
data->arg.symlink.pathlen = len;
|
|
data->arg.symlink.sattr = sattr;
|
|
|
|
d_alias = nfs3_do_create(dir, dentry, data);
|
|
status = PTR_ERR_OR_ZERO(d_alias);
|
|
|
|
if (status == 0)
|
|
dput(d_alias);
|
|
|
|
nfs3_free_createdata(data);
|
|
out:
|
|
dprintk("NFS reply symlink: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
|
|
{
|
|
struct posix_acl *default_acl, *acl;
|
|
struct nfs3_createdata *data;
|
|
struct dentry *d_alias;
|
|
int status = -ENOMEM;
|
|
|
|
dprintk("NFS call mkdir %pd\n", dentry);
|
|
|
|
data = nfs3_alloc_createdata();
|
|
if (data == NULL)
|
|
goto out;
|
|
|
|
status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
|
|
if (status)
|
|
goto out;
|
|
|
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
|
|
data->arg.mkdir.fh = NFS_FH(dir);
|
|
data->arg.mkdir.name = dentry->d_name.name;
|
|
data->arg.mkdir.len = dentry->d_name.len;
|
|
data->arg.mkdir.sattr = sattr;
|
|
|
|
d_alias = nfs3_do_create(dir, dentry, data);
|
|
status = PTR_ERR_OR_ZERO(d_alias);
|
|
|
|
if (status != 0)
|
|
goto out_release_acls;
|
|
|
|
if (d_alias)
|
|
dentry = d_alias;
|
|
|
|
status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
|
|
|
|
dput(d_alias);
|
|
out_release_acls:
|
|
posix_acl_release(acl);
|
|
posix_acl_release(default_acl);
|
|
out:
|
|
nfs3_free_createdata(data);
|
|
dprintk("NFS reply mkdir: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
|
|
{
|
|
struct nfs_fattr *dir_attr;
|
|
struct nfs3_diropargs arg = {
|
|
.fh = NFS_FH(dir),
|
|
.name = name->name,
|
|
.len = name->len
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
|
|
.rpc_argp = &arg,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
dprintk("NFS call rmdir %s\n", name->name);
|
|
dir_attr = nfs_alloc_fattr();
|
|
if (dir_attr == NULL)
|
|
goto out;
|
|
|
|
msg.rpc_resp = dir_attr;
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
nfs_post_op_update_inode(dir, dir_attr);
|
|
nfs_free_fattr(dir_attr);
|
|
out:
|
|
dprintk("NFS reply rmdir: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* The READDIR implementation is somewhat hackish - we pass the user buffer
|
|
* to the encode function, which installs it in the receive iovec.
|
|
* The decode function itself doesn't perform any decoding, it just makes
|
|
* sure the reply is syntactically correct.
|
|
*
|
|
* Also note that this implementation handles both plain readdir and
|
|
* readdirplus.
|
|
*/
|
|
static int nfs3_proc_readdir(struct nfs_readdir_arg *nr_arg,
|
|
struct nfs_readdir_res *nr_res)
|
|
{
|
|
struct inode *dir = d_inode(nr_arg->dentry);
|
|
struct nfs3_readdirargs arg = {
|
|
.fh = NFS_FH(dir),
|
|
.cookie = nr_arg->cookie,
|
|
.plus = nr_arg->plus,
|
|
.count = nr_arg->page_len,
|
|
.pages = nr_arg->pages
|
|
};
|
|
struct nfs3_readdirres res = {
|
|
.verf = nr_res->verf,
|
|
.plus = nr_arg->plus,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = nr_arg->cred,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
if (nr_arg->plus)
|
|
msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
|
|
if (arg.cookie)
|
|
memcpy(arg.verf, nr_arg->verf, sizeof(arg.verf));
|
|
|
|
dprintk("NFS call readdir%s %llu\n", nr_arg->plus ? "plus" : "",
|
|
(unsigned long long)nr_arg->cookie);
|
|
|
|
res.dir_attr = nfs_alloc_fattr();
|
|
if (res.dir_attr == NULL)
|
|
goto out;
|
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
|
|
nfs_invalidate_atime(dir);
|
|
nfs_refresh_inode(dir, res.dir_attr);
|
|
|
|
nfs_free_fattr(res.dir_attr);
|
|
out:
|
|
dprintk("NFS reply readdir%s: %d\n", nr_arg->plus ? "plus" : "",
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
|
|
dev_t rdev)
|
|
{
|
|
struct posix_acl *default_acl, *acl;
|
|
struct nfs3_createdata *data;
|
|
struct dentry *d_alias;
|
|
int status = -ENOMEM;
|
|
|
|
dprintk("NFS call mknod %pd %u:%u\n", dentry,
|
|
MAJOR(rdev), MINOR(rdev));
|
|
|
|
data = nfs3_alloc_createdata();
|
|
if (data == NULL)
|
|
goto out;
|
|
|
|
status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
|
|
if (status)
|
|
goto out;
|
|
|
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
|
|
data->arg.mknod.fh = NFS_FH(dir);
|
|
data->arg.mknod.name = dentry->d_name.name;
|
|
data->arg.mknod.len = dentry->d_name.len;
|
|
data->arg.mknod.sattr = sattr;
|
|
data->arg.mknod.rdev = rdev;
|
|
|
|
switch (sattr->ia_mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
data->arg.mknod.type = NF3BLK;
|
|
break;
|
|
case S_IFCHR:
|
|
data->arg.mknod.type = NF3CHR;
|
|
break;
|
|
case S_IFIFO:
|
|
data->arg.mknod.type = NF3FIFO;
|
|
break;
|
|
case S_IFSOCK:
|
|
data->arg.mknod.type = NF3SOCK;
|
|
break;
|
|
default:
|
|
status = -EINVAL;
|
|
goto out_release_acls;
|
|
}
|
|
|
|
d_alias = nfs3_do_create(dir, dentry, data);
|
|
status = PTR_ERR_OR_ZERO(d_alias);
|
|
if (status != 0)
|
|
goto out_release_acls;
|
|
|
|
if (d_alias)
|
|
dentry = d_alias;
|
|
|
|
status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
|
|
|
|
dput(d_alias);
|
|
out_release_acls:
|
|
posix_acl_release(acl);
|
|
posix_acl_release(default_acl);
|
|
out:
|
|
nfs3_free_createdata(data);
|
|
dprintk("NFS reply mknod: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsstat *stat)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
|
|
.rpc_argp = fhandle,
|
|
.rpc_resp = stat,
|
|
};
|
|
int status;
|
|
|
|
dprintk("NFS call fsstat\n");
|
|
nfs_fattr_init(stat->fattr);
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
dprintk("NFS reply fsstat: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
|
|
.rpc_argp = fhandle,
|
|
.rpc_resp = info,
|
|
};
|
|
int status;
|
|
|
|
dprintk("NFS call fsinfo\n");
|
|
nfs_fattr_init(info->fattr);
|
|
status = rpc_call_sync(client, &msg, 0);
|
|
dprintk("NFS reply fsinfo: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
|
|
* nfs_create_server
|
|
*/
|
|
static int
|
|
nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
int status;
|
|
|
|
status = do_proc_fsinfo(server->client, fhandle, info);
|
|
if (status && server->nfs_client->cl_rpcclient != server->client)
|
|
status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_pathconf *info)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
|
|
.rpc_argp = fhandle,
|
|
.rpc_resp = info,
|
|
};
|
|
int status;
|
|
|
|
dprintk("NFS call pathconf\n");
|
|
nfs_fattr_init(info->fattr);
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
dprintk("NFS reply pathconf: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
|
|
{
|
|
struct inode *inode = hdr->inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
|
|
if (hdr->pgio_done_cb != NULL)
|
|
return hdr->pgio_done_cb(task, hdr);
|
|
|
|
if (nfs3_async_handle_jukebox(task, inode))
|
|
return -EAGAIN;
|
|
|
|
if (task->tk_status >= 0 && !server->read_hdrsize)
|
|
cmpxchg(&server->read_hdrsize, 0, hdr->res.replen);
|
|
|
|
nfs_invalidate_atime(inode);
|
|
nfs_refresh_inode(inode, &hdr->fattr);
|
|
return 0;
|
|
}
|
|
|
|
static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
|
|
struct rpc_message *msg)
|
|
{
|
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
|
|
hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize;
|
|
}
|
|
|
|
static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
|
|
struct nfs_pgio_header *hdr)
|
|
{
|
|
rpc_call_start(task);
|
|
return 0;
|
|
}
|
|
|
|
static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
|
|
{
|
|
struct inode *inode = hdr->inode;
|
|
|
|
if (hdr->pgio_done_cb != NULL)
|
|
return hdr->pgio_done_cb(task, hdr);
|
|
|
|
if (nfs3_async_handle_jukebox(task, inode))
|
|
return -EAGAIN;
|
|
if (task->tk_status >= 0)
|
|
nfs_writeback_update_inode(hdr);
|
|
return 0;
|
|
}
|
|
|
|
static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
|
|
struct rpc_message *msg,
|
|
struct rpc_clnt **clnt)
|
|
{
|
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
|
|
}
|
|
|
|
static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
|
|
{
|
|
rpc_call_start(task);
|
|
}
|
|
|
|
static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
|
|
{
|
|
if (data->commit_done_cb != NULL)
|
|
return data->commit_done_cb(task, data);
|
|
|
|
if (nfs3_async_handle_jukebox(task, data->inode))
|
|
return -EAGAIN;
|
|
nfs_refresh_inode(data->inode, data->res.fattr);
|
|
return 0;
|
|
}
|
|
|
|
static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
|
|
struct rpc_clnt **clnt)
|
|
{
|
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
|
|
}
|
|
|
|
static void nfs3_nlm_alloc_call(void *data)
|
|
{
|
|
struct nfs_lock_context *l_ctx = data;
|
|
if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
|
|
get_nfs_open_context(l_ctx->open_context);
|
|
nfs_get_lock_context(l_ctx->open_context);
|
|
}
|
|
}
|
|
|
|
static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs_lock_context *l_ctx = data;
|
|
if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
|
|
return nfs_async_iocounter_wait(task, l_ctx);
|
|
return false;
|
|
|
|
}
|
|
|
|
static void nfs3_nlm_release_call(void *data)
|
|
{
|
|
struct nfs_lock_context *l_ctx = data;
|
|
struct nfs_open_context *ctx;
|
|
if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
|
|
ctx = l_ctx->open_context;
|
|
nfs_put_lock_context(l_ctx);
|
|
put_nfs_open_context(ctx);
|
|
}
|
|
}
|
|
|
|
static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
|
|
.nlmclnt_alloc_call = nfs3_nlm_alloc_call,
|
|
.nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
|
|
.nlmclnt_release_call = nfs3_nlm_release_call,
|
|
};
|
|
|
|
static int
|
|
nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct nfs_lock_context *l_ctx = NULL;
|
|
struct nfs_open_context *ctx = nfs_file_open_context(filp);
|
|
int status;
|
|
|
|
if (fl->c.flc_flags & FL_CLOSE) {
|
|
l_ctx = nfs_get_lock_context(ctx);
|
|
if (IS_ERR(l_ctx))
|
|
l_ctx = NULL;
|
|
else
|
|
set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
|
|
}
|
|
|
|
status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
|
|
|
|
if (l_ctx)
|
|
nfs_put_lock_context(l_ctx);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct inode_operations nfs3_dir_inode_operations = {
|
|
.create = nfs_create,
|
|
.atomic_open = nfs_atomic_open_v23,
|
|
.lookup = nfs_lookup,
|
|
.link = nfs_link,
|
|
.unlink = nfs_unlink,
|
|
.symlink = nfs_symlink,
|
|
.mkdir = nfs_mkdir,
|
|
.rmdir = nfs_rmdir,
|
|
.mknod = nfs_mknod,
|
|
.rename = nfs_rename,
|
|
.permission = nfs_permission,
|
|
.getattr = nfs_getattr,
|
|
.setattr = nfs_setattr,
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
.listxattr = nfs3_listxattr,
|
|
.get_inode_acl = nfs3_get_acl,
|
|
.set_acl = nfs3_set_acl,
|
|
#endif
|
|
};
|
|
|
|
static const struct inode_operations nfs3_file_inode_operations = {
|
|
.permission = nfs_permission,
|
|
.getattr = nfs_getattr,
|
|
.setattr = nfs_setattr,
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
.listxattr = nfs3_listxattr,
|
|
.get_inode_acl = nfs3_get_acl,
|
|
.set_acl = nfs3_set_acl,
|
|
#endif
|
|
};
|
|
|
|
const struct nfs_rpc_ops nfs_v3_clientops = {
|
|
.version = 3, /* protocol version */
|
|
.dentry_ops = &nfs_dentry_operations,
|
|
.dir_inode_ops = &nfs3_dir_inode_operations,
|
|
.file_inode_ops = &nfs3_file_inode_operations,
|
|
.file_ops = &nfs_file_operations,
|
|
.nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
|
|
.getroot = nfs3_proc_get_root,
|
|
.submount = nfs_submount,
|
|
.try_get_tree = nfs_try_get_tree,
|
|
.getattr = nfs3_proc_getattr,
|
|
.setattr = nfs3_proc_setattr,
|
|
.lookup = nfs3_proc_lookup,
|
|
.lookupp = nfs3_proc_lookupp,
|
|
.access = nfs3_proc_access,
|
|
.readlink = nfs3_proc_readlink,
|
|
.create = nfs3_proc_create,
|
|
.remove = nfs3_proc_remove,
|
|
.unlink_setup = nfs3_proc_unlink_setup,
|
|
.unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
|
|
.unlink_done = nfs3_proc_unlink_done,
|
|
.rename_setup = nfs3_proc_rename_setup,
|
|
.rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
|
|
.rename_done = nfs3_proc_rename_done,
|
|
.link = nfs3_proc_link,
|
|
.symlink = nfs3_proc_symlink,
|
|
.mkdir = nfs3_proc_mkdir,
|
|
.rmdir = nfs3_proc_rmdir,
|
|
.readdir = nfs3_proc_readdir,
|
|
.mknod = nfs3_proc_mknod,
|
|
.statfs = nfs3_proc_statfs,
|
|
.fsinfo = nfs3_proc_fsinfo,
|
|
.pathconf = nfs3_proc_pathconf,
|
|
.decode_dirent = nfs3_decode_dirent,
|
|
.pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
|
|
.read_setup = nfs3_proc_read_setup,
|
|
.read_done = nfs3_read_done,
|
|
.write_setup = nfs3_proc_write_setup,
|
|
.write_done = nfs3_write_done,
|
|
.commit_setup = nfs3_proc_commit_setup,
|
|
.commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
|
|
.commit_done = nfs3_commit_done,
|
|
.lock = nfs3_proc_lock,
|
|
.clear_acl_cache = forget_all_cached_acls,
|
|
.close_context = nfs_close_context,
|
|
.have_delegation = nfs3_have_delegation,
|
|
.alloc_client = nfs_alloc_client,
|
|
.init_client = nfs_init_client,
|
|
.free_client = nfs_free_client,
|
|
.create_server = nfs3_create_server,
|
|
.clone_server = nfs3_clone_server,
|
|
};
|