1 files changed, 78 insertions, 0 deletions

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 0ddd97b1d87d..fea32e395cc6 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1353,6 +1353,84 @@ CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
 }
 
 int
+CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
+		const __u16 smb_file_id, const int get_flag, const __u64 len,
+		const __u64 lkoffset, const __u16 lock_type, const int waitFlag)
+{
+	struct smb_com_transaction2_sfi_req *pSMB  = NULL;
+	struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
+	char *data_offset;
+	struct cifs_posix_lock *parm_data;
+	int rc = 0;
+	int bytes_returned = 0;
+	__u16 params, param_offset, offset, byte_count, count;
+
+	cFYI(1, ("Posix Lock"));
+	rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
+
+	if (rc)
+		return rc;
+
+	pSMBr = (struct smb_com_transaction2_sfi_rsp *)pSMB;
+
+	params = 6; 
+	pSMB->MaxSetupCount = 0;
+	pSMB->Reserved = 0;
+	pSMB->Flags = 0;
+	pSMB->Timeout = 0;
+	pSMB->Reserved2 = 0;
+	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
+	offset = param_offset + params;
+
+	data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
+
+	count = sizeof(struct cifs_posix_lock);
+	pSMB->MaxParameterCount = cpu_to_le16(2);
+	pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB PDU from sess */
+	pSMB->SetupCount = 1;
+	pSMB->Reserved3 = 0;
+	if(get_flag)
+		pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
+	else
+		pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
+	byte_count = 3 /* pad */  + params + count;
+	pSMB->DataCount = cpu_to_le16(count);
+	pSMB->ParameterCount = cpu_to_le16(params);
+	pSMB->TotalDataCount = pSMB->DataCount;
+	pSMB->TotalParameterCount = pSMB->ParameterCount;
+	pSMB->ParameterOffset = cpu_to_le16(param_offset);
+	parm_data = (struct cifs_posix_lock *) 
+			(((char *) &pSMB->hdr.Protocol) + offset);
+
+	parm_data->lock_type = cpu_to_le16(lock_type);
+	if(waitFlag)
+		parm_data->lock_flags = 1;
+	parm_data->pid = cpu_to_le32(current->tgid);
+	parm_data->start = lkoffset;
+	parm_data->length = len;  /* normalize negative numbers */
+
+	pSMB->DataOffset = cpu_to_le16(offset);
+	pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_LOCK);
+	pSMB->Reserved4 = 0;
+	pSMB->hdr.smb_buf_length += byte_count;
+	pSMB->ByteCount = cpu_to_le16(byte_count);
+	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (rc) {
+		cFYI(1, ("Send error in Posix Lock = %d", rc));
+	}
+
+	if (pSMB)
+		cifs_small_buf_release(pSMB);
+
+	/* Note: On -EAGAIN error only caller can retry on handle based calls
+	   since file handle passed in no longer valid */
+
+	return rc;
+}
+
+
+int
 CIFSSMBClose(const int xid, struct cifsTconInfo *tcon, int smb_file_id)
 {
 	int rc = 0;