reactos/base/services/nfsd/upcall.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 <stdio.h>
#include <time.h>
#include "upcall.h"
#include "daemon_debug.h"
#include "util.h"
extern const nfs41_upcall_op nfs41_op_mount;
extern const nfs41_upcall_op nfs41_op_unmount;
extern const nfs41_upcall_op nfs41_op_open;
extern const nfs41_upcall_op nfs41_op_close;
extern const nfs41_upcall_op nfs41_op_read;
extern const nfs41_upcall_op nfs41_op_write;
extern const nfs41_upcall_op nfs41_op_lock;
extern const nfs41_upcall_op nfs41_op_unlock;
extern const nfs41_upcall_op nfs41_op_readdir;
extern const nfs41_upcall_op nfs41_op_getattr;
extern const nfs41_upcall_op nfs41_op_setattr;
extern const nfs41_upcall_op nfs41_op_getexattr;
extern const nfs41_upcall_op nfs41_op_setexattr;
extern const nfs41_upcall_op nfs41_op_symlink;
extern const nfs41_upcall_op nfs41_op_volume;
extern const nfs41_upcall_op nfs41_op_getacl;
extern const nfs41_upcall_op nfs41_op_setacl;
static const nfs41_upcall_op *g_upcall_op_table[] = {
&nfs41_op_mount,
&nfs41_op_unmount,
&nfs41_op_open,
&nfs41_op_close,
&nfs41_op_read,
&nfs41_op_write,
&nfs41_op_lock,
&nfs41_op_unlock,
&nfs41_op_readdir,
&nfs41_op_getattr,
&nfs41_op_setattr,
&nfs41_op_getexattr,
&nfs41_op_setexattr,
&nfs41_op_symlink,
&nfs41_op_volume,
&nfs41_op_getacl,
&nfs41_op_setacl,
NULL,
NULL
};
#ifdef __REACTOS__
static const uint32_t g_upcall_op_table_size = (sizeof(g_upcall_op_table) / sizeof(g_upcall_op_table[0]));
#else
static const uint32_t g_upcall_op_table_size = ARRAYSIZE(g_upcall_op_table);
#endif
int upcall_parse(
IN unsigned char *buffer,
IN uint32_t length,
OUT nfs41_upcall *upcall)
{
int status;
const nfs41_upcall_op *op;
DWORD version;
ZeroMemory(upcall, sizeof(nfs41_upcall));
if (!length) {
eprintf("empty upcall\n");
upcall->status = status = 102;
goto out;
}
dprintf(2, "received %d bytes upcall data: processing upcall\n", length);
print_hexbuf(4, (unsigned char *)"upcall buffer: ", buffer, length);
/* parse common elements */
status = safe_read(&buffer, &length, &version, sizeof(uint32_t));
if (status) goto out;
status = safe_read(&buffer, &length, &upcall->xid, sizeof(uint64_t));
if (status) goto out;
status = safe_read(&buffer, &length, &upcall->opcode, sizeof(uint32_t));
if (status) goto out;
status = safe_read(&buffer, &length, &upcall->root_ref, sizeof(HANDLE));
if (status) goto out;
status = safe_read(&buffer, &length, &upcall->state_ref, sizeof(HANDLE));
if (status) goto out;
dprintf(2, "time=%ld version=%d xid=%d opcode=%s session=0x%x open_state=0x%x\n",
time(NULL), version, upcall->xid, opcode2string(upcall->opcode), upcall->root_ref,
upcall->state_ref);
if (version != NFS41D_VERSION) {
eprintf("received version %d expecting version %d\n", version, NFS41D_VERSION);
upcall->status = status = NFSD_VERSION_MISMATCH;
goto out;
}
if (upcall->opcode >= g_upcall_op_table_size) {
status = ERROR_NOT_SUPPORTED;
eprintf("unrecognized upcall opcode %d!\n", upcall->opcode);
goto out;
}
if (upcall->root_ref != INVALID_HANDLE_VALUE)
nfs41_root_ref(upcall->root_ref);
if (upcall->state_ref != INVALID_HANDLE_VALUE)
nfs41_open_state_ref(upcall->state_ref);
/* parse the operation's arguments */
op = g_upcall_op_table[upcall->opcode];
if (op && op->parse) {
status = op->parse(buffer, length, upcall);
if (status) {
eprintf("parsing of upcall '%s' failed with %d.\n",
opcode2string(upcall->opcode), status);
goto out;
}
}
out:
return status;
}
int upcall_handle(
IN nfs41_upcall *upcall)
{
int status = NO_ERROR;
const nfs41_upcall_op *op;
op = g_upcall_op_table[upcall->opcode];
if (op == NULL || op->handle == NULL) {
status = ERROR_NOT_SUPPORTED;
eprintf("upcall '%s' missing handle function!\n",
opcode2string(upcall->opcode));
goto out;
}
upcall->status = op->handle(upcall);
out:
return status;
}
#pragma warning (disable : 4706) /* assignment within conditional expression */
void upcall_marshall(
IN nfs41_upcall *upcall,
OUT unsigned char *buffer,
IN uint32_t length,
OUT uint32_t *length_out)
{
const nfs41_upcall_op *op;
unsigned char *orig_buf = buffer;
const uint32_t total = length, orig_len = length;
/* marshall common elements */
write_downcall:
length = orig_len;
buffer = orig_buf;
safe_write(&buffer, &length, &upcall->xid, sizeof(upcall->xid));
safe_write(&buffer, &length, &upcall->opcode, sizeof(upcall->opcode));
safe_write(&buffer, &length, &upcall->status, sizeof(upcall->status));
safe_write(&buffer, &length, &upcall->last_error, sizeof(upcall->last_error));
if (upcall->status)
goto out;
/* marshall the operation's results */
op = g_upcall_op_table[upcall->opcode];
if (op && op->marshall) {
if ((upcall->status = op->marshall(buffer, &length, upcall)))
goto write_downcall;
}
out:
*length_out = total - length;
}
void upcall_cancel(
IN nfs41_upcall *upcall)
{
const nfs41_upcall_op *op = g_upcall_op_table[upcall->opcode];
if (op && op->cancel)
op->cancel(upcall);
}
void upcall_cleanup(
IN nfs41_upcall *upcall)
{
const nfs41_upcall_op *op = g_upcall_op_table[upcall->opcode];
if (op && op->cleanup && upcall->status != NFSD_VERSION_MISMATCH)
op->cleanup(upcall);
if (upcall->state_ref && upcall->state_ref != INVALID_HANDLE_VALUE) {
nfs41_open_state_deref(upcall->state_ref);
upcall->state_ref = NULL;
}
if (upcall->root_ref && upcall->root_ref != INVALID_HANDLE_VALUE) {
nfs41_root_deref(upcall->root_ref);
upcall->root_ref = NULL;
}
}