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| author | Jeremy Allison <jra@samba.org> | 2011-07-28 20:23:30 -0700 |
|---|---|---|
| committer | Jeremy Allison <jra@samba.org> | 2011-07-29 20:37:42 +0200 |
| commit | 1d4d9194abf3694e2f890744c6f7764088b1c1f3 (patch) | |
| tree | bd6183f8e875413caae52258fcca68ca803fac9c /source3/smbd | |
| parent | 9edc1599125fbd3588a22d9a4145666a9c322798 (diff) | |
| download | samba-1d4d9194abf3694e2f890744c6f7764088b1c1f3.tar.gz samba-1d4d9194abf3694e2f890744c6f7764088b1c1f3.tar.bz2 samba-1d4d9194abf3694e2f890744c6f7764088b1c1f3.zip | |
Secod part of bugfix for bug #8335 - file copy aborts with smb2_validate_message_id: bad message_id
Modify the credit granting algorithm to closer to what I believe
Windows does.
Split up max_credits into 1/16ths, and then scale
the requested credits by how many 16ths have been
currently granted. Less than 1/16th == grant all
requested (100%), scale down as more have been
granted. Never ask for less than 1 if the client
asked for at least 1.
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Fri Jul 29 20:37:42 CEST 2011 on sn-devel-104
Diffstat (limited to 'source3/smbd')
| -rw-r--r-- | source3/smbd/smb2_server.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c index 11b5ed8bf0..288cc79b54 100644 --- a/source3/smbd/smb2_server.c +++ b/source3/smbd/smb2_server.c @@ -455,9 +455,30 @@ static void smb2_set_operation_credit(struct smbd_server_connection *sconn, SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted); - /* Remember what we gave out. */ - credits_granted = MIN(credits_requested, (sconn->smb2.max_credits - - sconn->smb2.credits_granted)); + if (credits_requested) { + uint16_t modified_credits_requested; + uint32_t multiplier; + + /* + * Split up max_credits into 1/16ths, and then scale + * the requested credits by how many 16ths have been + * currently granted. Less than 1/16th == grant all + * requested (100%), scale down as more have been + * granted. Never ask for less than 1 as the client + * asked for at least 1. JRA. + */ + + multiplier = 16 - (((sconn->smb2.credits_granted * 16) / sconn->smb2.max_credits) % 16); + + modified_credits_requested = (multiplier * credits_requested) / 16; + if (modified_credits_requested == 0) { + modified_credits_requested = 1; + } + + /* Remember what we gave out. */ + credits_granted = MIN(modified_credits_requested, + (sconn->smb2.max_credits - sconn->smb2.credits_granted)); + } if (credits_granted == 0 && sconn->smb2.credits_granted == 0) { /* First negprot packet, or ensure the client credits can |