diff options
Diffstat (limited to 'fs/cifs/cifssmb.c')
| -rw-r--r-- | fs/cifs/cifssmb.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 0ddd97b1d87d43..fea32e395cc69e 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; |