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path: root/fs/cifs/cifssmb.c
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Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c40
1 files changed, 35 insertions, 5 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index fd36892eda55..925881e00ff2 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1355,7 +1355,8 @@ CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
1355int 1355int
1356CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon, 1356CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
1357 const __u16 smb_file_id, const int get_flag, const __u64 len, 1357 const __u16 smb_file_id, const int get_flag, const __u64 len,
1358 const __u64 lkoffset, const __u16 lock_type, const int waitFlag) 1358 struct file_lock *pLockData, const __u16 lock_type,
1359 const int waitFlag)
1359{ 1360{
1360 struct smb_com_transaction2_sfi_req *pSMB = NULL; 1361 struct smb_com_transaction2_sfi_req *pSMB = NULL;
1361 struct smb_com_transaction2_sfi_rsp *pSMBr = NULL; 1362 struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
@@ -1366,6 +1367,10 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
1366 __u16 params, param_offset, offset, byte_count, count; 1367 __u16 params, param_offset, offset, byte_count, count;
1367 1368
1368 cFYI(1, ("Posix Lock")); 1369 cFYI(1, ("Posix Lock"));
1370
1371 if(pLockData == NULL)
1372 return EINVAL;
1373
1369 rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB); 1374 rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
1370 1375
1371 if (rc) 1376 if (rc)
@@ -1404,10 +1409,10 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
1404 1409
1405 parm_data->lock_type = cpu_to_le16(lock_type); 1410 parm_data->lock_type = cpu_to_le16(lock_type);
1406 if(waitFlag) 1411 if(waitFlag)
1407 parm_data->lock_flags = 1; 1412 parm_data->lock_flags = cpu_to_le16(1);
1408 parm_data->pid = cpu_to_le32(current->tgid); 1413 parm_data->pid = cpu_to_le32(current->tgid);
1409 parm_data->start = lkoffset; 1414 parm_data->start = cpu_to_le64(pLockData->fl_start);
1410 parm_data->length = len; /* normalize negative numbers */ 1415 parm_data->length = cpu_to_le64(len); /* normalize negative numbers */
1411 1416
1412 pSMB->DataOffset = cpu_to_le16(offset); 1417 pSMB->DataOffset = cpu_to_le16(offset);
1413 pSMB->Fid = smb_file_id; 1418 pSMB->Fid = smb_file_id;
@@ -1419,8 +1424,33 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
1419 (struct smb_hdr *) pSMBr, &bytes_returned, 0); 1424 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
1420 if (rc) { 1425 if (rc) {
1421 cFYI(1, ("Send error in Posix Lock = %d", rc)); 1426 cFYI(1, ("Send error in Posix Lock = %d", rc));
1422 } 1427 } else if (get_flag) {
1428 /* lock structure can be returned on get */
1429 __u16 data_offset;
1430 __u16 data_count;
1431 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
1423 1432
1433 if (rc || (pSMBr->ByteCount < sizeof(struct cifs_posix_lock))) {
1434 rc = -EIO; /* bad smb */
1435 goto plk_err_exit;
1436 }
1437 if(pLockData == NULL) {
1438 rc = -EINVAL;
1439 goto plk_err_exit;
1440 }
1441 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
1442 data_count = le16_to_cpu(pSMBr->t2.DataCount);
1443 if(data_count < sizeof(struct cifs_posix_lock)) {
1444 rc = -EIO;
1445 goto plk_err_exit;
1446 }
1447 parm_data = (struct cifs_posix_lock *)
1448 ((char *)&pSMBr->hdr.Protocol + data_offset);
1449 if(parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
1450 pLockData->fl_type = F_UNLCK;
1451 }
1452
1453plk_err_exit:
1424 if (pSMB) 1454 if (pSMB)
1425 cifs_small_buf_release(pSMB); 1455 cifs_small_buf_release(pSMB);
1426 1456