reactos/base/services/nfsd/mount.c

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/* NFSv4.1 client for Windows
* Copyright <EFBFBD> 2012 The Regents of the University of Michigan
*
* Olga Kornievskaia <aglo@umich.edu>
* Casey Bodley <cbodley@umich.edu>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* without any warranty; without even the implied warranty of merchantability
* or fitness for a particular purpose. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA
*/
#include <windows.h>
#include <strsafe.h>
#include <stdio.h>
#include "daemon_debug.h"
#include "nfs41_ops.h"
#include "upcall.h"
#include "util.h"
/* NFS41_MOUNT */
static int parse_mount(unsigned char *buffer, uint32_t length, nfs41_upcall *upcall)
{
int status;
mount_upcall_args *args = &upcall->args.mount;
status = get_name(&buffer, &length, &args->hostname);
if(status) goto out;
status = get_name(&buffer, &length, &args->path);
if(status) goto out;
status = safe_read(&buffer, &length, &args->sec_flavor, sizeof(DWORD));
if (status) goto out;
status = safe_read(&buffer, &length, &args->rsize, sizeof(DWORD));
if (status) goto out;
status = safe_read(&buffer, &length, &args->wsize, sizeof(DWORD));
if (status) goto out;
dprintf(1, "parsing NFS14_MOUNT: srv_name=%s root=%s sec_flavor=%s "
"rsize=%d wsize=%d\n", args->hostname, args->path,
secflavorop2name(args->sec_flavor), args->rsize, args->wsize);
out:
return status;
}
static int handle_mount(nfs41_upcall *upcall)
{
int status;
mount_upcall_args *args = &upcall->args.mount;
nfs41_abs_path path;
multi_addr4 addrs;
nfs41_root *root;
nfs41_client *client;
nfs41_path_fh file;
// resolve hostname,port
status = nfs41_server_resolve(args->hostname, 2049, &addrs);
if (status) {
eprintf("nfs41_server_resolve() failed with %d\n", status);
goto out;
}
if (upcall->root_ref != INVALID_HANDLE_VALUE) {
/* use an existing root from a previous mount, but don't take an
* extra reference; we'll only get one UNMOUNT upcall for each root */
root = upcall->root_ref;
} else {
// create root
status = nfs41_root_create(args->hostname, args->sec_flavor,
args->wsize + WRITE_OVERHEAD, args->rsize + READ_OVERHEAD, &root);
if (status) {
eprintf("nfs41_root_create() failed %d\n", status);
goto out;
}
root->uid = upcall->uid;
root->gid = upcall->gid;
}
// find or create the client/session
status = nfs41_root_mount_addrs(root, &addrs, 0, 0, &client);
if (status) {
eprintf("nfs41_root_mount_addrs() failed with %d\n", status);
goto out_err;
}
// make a copy of the path for nfs41_lookup()
InitializeSRWLock(&path.lock);
if (FAILED(StringCchCopyA(path.path, NFS41_MAX_PATH_LEN, args->path))) {
status = ERROR_FILENAME_EXCED_RANGE;
goto out_err;
}
path.len = (unsigned short)strlen(path.path);
// look up the mount path, and fail if it doesn't exist
status = nfs41_lookup(root, client->session,
&path, NULL, &file, NULL, NULL);
if (status) {
eprintf("nfs41_lookup('%s') failed with %d\n", path.path, status);
status = ERROR_BAD_NETPATH;
goto out_err;
}
nfs41_superblock_fs_attributes(file.fh.superblock, &args->FsAttrs);
if (upcall->root_ref == INVALID_HANDLE_VALUE)
nfs41_root_ref(root);
upcall->root_ref = root;
args->lease_time = client->session->lease_time;
out:
return status;
out_err:
if (upcall->root_ref == INVALID_HANDLE_VALUE)
nfs41_root_deref(root);
goto out;
}
static int marshall_mount(unsigned char *buffer, uint32_t *length, nfs41_upcall *upcall)
{
mount_upcall_args *args = &upcall->args.mount;
int status;
dprintf(2, "NFS41_MOUNT: writing pointer to nfs41_root %p, version %d, "
"lease_time %d\n", upcall->root_ref, NFS41D_VERSION, args->lease_time);
status = safe_write(&buffer, length, &upcall->root_ref, sizeof(HANDLE));
if (status) goto out;
status = safe_write(&buffer, length, &NFS41D_VERSION, sizeof(DWORD));
if (status) goto out;
status = safe_write(&buffer, length, &args->lease_time, sizeof(DWORD));
if (status) goto out;
status = safe_write(&buffer, length, &args->FsAttrs, sizeof(args->FsAttrs));
out:
return status;
}
static void cancel_mount(IN nfs41_upcall *upcall)
{
if (upcall->root_ref != INVALID_HANDLE_VALUE)
nfs41_root_deref(upcall->root_ref);
}
const nfs41_upcall_op nfs41_op_mount = {
parse_mount,
handle_mount,
marshall_mount,
cancel_mount
};
/* NFS41_UNMOUNT */
static int parse_unmount(unsigned char *buffer, uint32_t length, nfs41_upcall *upcall)
{
dprintf(1, "parsing NFS41_UNMOUNT: root=%p\n", upcall->root_ref);
return ERROR_SUCCESS;
}
static int handle_unmount(nfs41_upcall *upcall)
{
/* release the original reference from nfs41_root_create() */
nfs41_root_deref(upcall->root_ref);
return ERROR_SUCCESS;
}
const nfs41_upcall_op nfs41_op_unmount = {
parse_unmount,
handle_unmount
};