mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-10 04:26:40 +07:00
c95b8eeda3
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
173 lines
4.7 KiB
C
173 lines
4.7 KiB
C
/*
|
|
* fs/cifs/smb2transport.c
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2002, 2011
|
|
* Etersoft, 2012
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
* Jeremy Allison (jra@samba.org) 2006
|
|
* Pavel Shilovsky (pshilovsky@samba.org) 2012
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/list.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/net.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/processor.h>
|
|
#include <linux/mempool.h>
|
|
#include "smb2pdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifsproto.h"
|
|
#include "smb2proto.h"
|
|
#include "cifs_debug.h"
|
|
#include "smb2status.h"
|
|
|
|
/*
|
|
* Set message id for the request. Should be called after wait_for_free_request
|
|
* and when srv_mutex is held.
|
|
*/
|
|
static inline void
|
|
smb2_seq_num_into_buf(struct TCP_Server_Info *server, struct smb2_hdr *hdr)
|
|
{
|
|
hdr->MessageId = get_next_mid(server);
|
|
}
|
|
|
|
static struct mid_q_entry *
|
|
smb2_mid_entry_alloc(const struct smb2_hdr *smb_buffer,
|
|
struct TCP_Server_Info *server)
|
|
{
|
|
struct mid_q_entry *temp;
|
|
|
|
if (server == NULL) {
|
|
cERROR(1, "Null TCP session in smb2_mid_entry_alloc");
|
|
return NULL;
|
|
}
|
|
|
|
temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
|
|
if (temp == NULL)
|
|
return temp;
|
|
else {
|
|
memset(temp, 0, sizeof(struct mid_q_entry));
|
|
temp->mid = smb_buffer->MessageId; /* always LE */
|
|
temp->pid = current->pid;
|
|
temp->command = smb_buffer->Command; /* Always LE */
|
|
temp->when_alloc = jiffies;
|
|
temp->server = server;
|
|
|
|
/*
|
|
* The default is for the mid to be synchronous, so the
|
|
* default callback just wakes up the current task.
|
|
*/
|
|
temp->callback = cifs_wake_up_task;
|
|
temp->callback_data = current;
|
|
}
|
|
|
|
atomic_inc(&midCount);
|
|
temp->mid_state = MID_REQUEST_ALLOCATED;
|
|
return temp;
|
|
}
|
|
|
|
static int
|
|
smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_hdr *buf,
|
|
struct mid_q_entry **mid)
|
|
{
|
|
if (ses->server->tcpStatus == CifsExiting)
|
|
return -ENOENT;
|
|
|
|
if (ses->server->tcpStatus == CifsNeedReconnect) {
|
|
cFYI(1, "tcp session dead - return to caller to retry");
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (ses->status != CifsGood) {
|
|
/* check if SMB2 session is bad because we are setting it up */
|
|
if ((buf->Command != SMB2_SESSION_SETUP) &&
|
|
(buf->Command != SMB2_NEGOTIATE))
|
|
return -EAGAIN;
|
|
/* else ok - we are setting up session */
|
|
}
|
|
*mid = smb2_mid_entry_alloc(buf, ses->server);
|
|
if (*mid == NULL)
|
|
return -ENOMEM;
|
|
spin_lock(&GlobalMid_Lock);
|
|
list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q);
|
|
spin_unlock(&GlobalMid_Lock);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
|
|
bool log_error)
|
|
{
|
|
unsigned int len = get_rfc1002_length(mid->resp_buf);
|
|
|
|
dump_smb(mid->resp_buf, min_t(u32, 80, len));
|
|
/* convert the length into a more usable form */
|
|
/* BB - uncomment with SMB2 signing implementation */
|
|
/* if ((len > 24) &&
|
|
(server->sec_mode & (SECMODE_SIGN_REQUIRED|SECMODE_SIGN_ENABLED))) {
|
|
if (smb2_verify_signature(mid->resp_buf, server))
|
|
cERROR(1, "Unexpected SMB signature");
|
|
} */
|
|
|
|
return map_smb2_to_linux_error(mid->resp_buf, log_error);
|
|
}
|
|
|
|
int
|
|
smb2_setup_request(struct cifs_ses *ses, struct kvec *iov,
|
|
unsigned int nvec, struct mid_q_entry **ret_mid)
|
|
{
|
|
int rc;
|
|
struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base;
|
|
struct mid_q_entry *mid;
|
|
|
|
smb2_seq_num_into_buf(ses->server, hdr);
|
|
|
|
rc = smb2_get_mid_entry(ses, hdr, &mid);
|
|
if (rc)
|
|
return rc;
|
|
/* rc = smb2_sign_smb2(iov, nvec, ses->server);
|
|
if (rc)
|
|
delete_mid(mid); */
|
|
*ret_mid = mid;
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
smb2_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
|
|
unsigned int nvec, struct mid_q_entry **ret_mid)
|
|
{
|
|
int rc = 0;
|
|
struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base;
|
|
struct mid_q_entry *mid;
|
|
|
|
smb2_seq_num_into_buf(server, hdr);
|
|
|
|
mid = smb2_mid_entry_alloc(hdr, server);
|
|
if (mid == NULL)
|
|
return -ENOMEM;
|
|
|
|
/* rc = smb2_sign_smb2(iov, nvec, server);
|
|
if (rc) {
|
|
DeleteMidQEntry(mid);
|
|
return rc;
|
|
}*/
|
|
*ret_mid = mid;
|
|
return rc;
|
|
}
|