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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1887f60103
Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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* SMB1 (CIFS) version specific operations
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*
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* Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License v2 as published
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* by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "cifsglob.h"
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#include "cifsproto.h"
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#include "cifs_debug.h"
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#include "cifspdu.h"
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/*
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* An NT cancel request header looks just like the original request except:
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*
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* The Command is SMB_COM_NT_CANCEL
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* The WordCount is zeroed out
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* The ByteCount is zeroed out
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*
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* This function mangles an existing request buffer into a
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* SMB_COM_NT_CANCEL request and then sends it.
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*/
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static int
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send_nt_cancel(struct TCP_Server_Info *server, void *buf,
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struct mid_q_entry *mid)
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{
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int rc = 0;
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struct smb_hdr *in_buf = (struct smb_hdr *)buf;
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/* -4 for RFC1001 length and +2 for BCC field */
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in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
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in_buf->Command = SMB_COM_NT_CANCEL;
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in_buf->WordCount = 0;
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put_bcc(0, in_buf);
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mutex_lock(&server->srv_mutex);
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rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
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if (rc) {
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mutex_unlock(&server->srv_mutex);
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return rc;
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}
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rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
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mutex_unlock(&server->srv_mutex);
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cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
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in_buf->Mid, rc);
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return rc;
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}
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static bool
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cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
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{
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return ob1->netfid == ob2->netfid;
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}
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struct smb_version_operations smb1_operations = {
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.send_cancel = send_nt_cancel,
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.compare_fids = cifs_compare_fids,
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.setup_request = cifs_setup_request,
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.check_receive = cifs_check_receive,
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};
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struct smb_version_values smb1_values = {
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.version_string = SMB1_VERSION_STRING,
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.large_lock_type = LOCKING_ANDX_LARGE_FILES,
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.exclusive_lock_type = 0,
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.shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
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.unlock_lock_type = 0,
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.header_size = sizeof(struct smb_hdr),
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.max_header_size = MAX_CIFS_HDR_SIZE,
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};
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