File open for writing using libsmbclient works with SMB1, but not with SMB2. Client: Linux with Samba 4.2.10 Server: Windows 2012 R2 File creation is ok, but for the getinfo request the file server gives access-denied for some reasons. The user has full access with SYNCHRONIZE turned on and additionally owner of the directory. Are you aware of any known issue with this setup? From client to server: SMB2 (Server Message Block Protocol version 2) SMB2 Header Server Component: SMB2 Header Length: 64 Credit Charge: 1 Channel Sequence: 0 Reserved: 0000 Command: GetInfo (16) Credits requested: 7904 Flags: 0x00000000 Chain Offset: 0x00000000 Message ID: 11 Process Id: 0x00000000 Tree Id: 0x00000005 \\xxxx-xxxx-xxx03.xxxxxxxxxxx.com\datafiles Session Id: 0x0000400000000d11 Acct:srv_xxxxx_test Domain:xxx Host:xxxx-xxxx-xxx09 [Account: srv_xxxxx_test] [Domain: xxx] [Host: xxxx-xxxx-xxx09] [Authenticated in Frame: 679] Signature: 00000000000000000000000000000000 [Response in: 712] GetInfo Request (0x10) StructureSize: 0x0029 Class: FILE_INFO (0x01) InfoLevel: SMB2_FILE_ALL_INFO (0x12) Max Response Size: 65535 unknown: 00000000000000000000000000000000 GUID handle File: Log\2017.05.24\smbtest_trad_profile_dump.log File Id: 00055022-0010-0000-0100-000010000000 [Frame handle opened: 706] [Frame handle closed: 713] From server to client: SMB2 (Server Message Block Protocol version 2) SMB2 Header Server Component: SMB2 Header Length: 64 Credit Charge: 1 NT Status: STATUS_ACCESS_DENIED (0xc0000022) Command: GetInfo (16) Credits granted: 33 Flags: 0x00000001, Response Chain Offset: 0x00000000 Message ID: 11 Process Id: 0x00000000 Tree Id: 0x00000005 \\xxxx-xxxx-xxx03.xxxxxxxxxxx.com\datafiles Session Id: 0x0000400000000d11 Acct:srv_xxxxx_test Domain:xxx Host:xxxx-xxxx-xxx09 [Account: srv_xxxxx_test] [Domain: xxx] [Host: xxxx-xxxx-xxx09] [Authenticated in Frame: 679] Signature: 00000000000000000000000000000000 [Response to: 710] [Time from request: 0.000107000 seconds] GetInfo Response (0x10) [Class: FILE_INFO (0x01)] [InfoLevel: SMB2_FILE_ALL_INFO (0x12)] StructureSize: 0x0009 Reserved: 0x0000 Byte Count: 0 Error Data: 00
As 4.7 will use SMB2/3 as default we should make sure this is fixed. Can you please try to reproduce this with 4.7.0rc1 (will be released next week) or the current git master branch?
Sorry for the late answer...... troubleshooting it further showed we opened the file only for writing with no read access. Then positioning with seek resulted in the below mentioned "SMB2_FILE_ALL_INFO" call which requires read access on the server side (Microsoft). That was the call below what gave "STATUS_ACCESS_DENIED". We had the impression no read access is necessary for only writing a file. This only happens with SMBv2 and above, SMBv1 is fine.
It is not a bug. Please, close it.