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* CIFS: Move echo code to osp structPavel Shilovsky2012-07-241-4/+6
| | | | | Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move building path to root to ops structPavel Shilovsky2012-07-241-1/+1
| | | | | Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move is_path_accessible to ops structPavel Shilovsky2012-07-241-25/+6Star
| | | | | Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move informational tcon calls to ops structPavel Shilovsky2012-07-241-27/+24Star
| | | | | | | and rename variables in cifs_mount. Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move getting dfs referalls to ops structPavel Shilovsky2012-07-241-7/+8
| | | | | Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Process reconnects for SMB2 sharesPavel Shilovsky2012-07-241-0/+3
| | | | | Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Add SMB2 credits supportPavel Shilovsky2012-07-241-1/+1
| | | | | | | | | | | For SMB2 protocol we can add more than one credit for one received request: it depends on CreditRequest field in SMB2 response header. Also we divide all requests by type: echoes, oplocks and others. Each type uses its own slot pull. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Rename Get/FreeXid and make them work with unsigned intPavel Shilovsky2012-07-241-20/+20
| | | | | | Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move protocol specific tcon/tdis code to ops structPavel Shilovsky2012-07-241-30/+43
| | | | | | | | and rename variables around the code changes. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move protocol specific session setup/logoff code to ops structPavel Shilovsky2012-07-241-8/+10
| | | | | | Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move protocol specific negotiate code to ops structPavel Shilovsky2012-07-241-13/+11Star
| | | | | | Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* CIFS: Move trans2 processing to ops structPavel Shilovsky2012-07-241-159/+2Star
| | | | | | Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <smfrench@gmail.com>
* cifs: reinstate sec=ntlmv2 mount optionJeff Layton2012-07-241-4/+5
| | | | | | | | | | sec=ntlmv2 as a mount option got dropped in the mount option overhaul. Cc: Sachin Prabhu <sprabhu@redhat.com> Cc: <stable@vger.kernel.org> # 3.4+ Reported-by: Günter Kukkukk <linux@kukkukk.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
* cifs: remove extraneous newlines from cERROR and cFYI callsJeff Layton2012-07-231-7/+7
| | | | | | | | Those macros add a newline on their own, so there's not any need to embed one in the message itself. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
* cifs: on CONFIG_HIGHMEM machines, limit the rsize/wsize to the kmap spaceJeff Layton2012-07-171-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | We currently rely on being able to kmap all of the pages in an async read or write request. If you're on a machine that has CONFIG_HIGHMEM set then that kmap space is limited, sometimes to as low as 512 slots. With 512 slots, we can only support up to a 2M r/wsize, and that's assuming that we can get our greedy little hands on all of them. There are other users however, so it's possible we'll end up stuck with a size that large. Since we can't handle a rsize or wsize larger than that currently, cap those options at the number of kmap slots we have. We could consider capping it even lower, but we currently default to a max of 1M. Might as well allow those luddites on 32 bit arches enough rope to hang themselves. A more robust fix would be to teach the send and receive routines how to contend with an array of pages so we don't need to marshal up a kvec array at all. That's a fairly significant overhaul though, so we'll need this limit in place until that's ready. Cc: <stable@vger.kernel.org> Reported-by: Jian Li <jiali@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
* cifs: when server doesn't set CAP_LARGE_READ_X, cap default rsize at ↵Jeff Layton2012-07-031-6/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | MaxBufferSize When the server doesn't advertise CAP_LARGE_READ_X, then MS-CIFS states that you must cap the size of the read at the client's MaxBufferSize. Unfortunately, testing with many older servers shows that they often can't service a read larger than their own MaxBufferSize. Since we can't assume what the server will do in this situation, we must be conservative here for the default. When the server can't do large reads, then assume that it can't satisfy any read larger than its MaxBufferSize either. Luckily almost all modern servers can do large reads, so this won't affect them. This is really just for older win9x and OS/2 era servers. Also, note that this patch just governs the default rsize. The admin can always override this if he so chooses. Cc: <stable@vger.kernel.org> # 3.2 Reported-by: David H. Durgee <dhdurgee@acm.org> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steven French <sfrench@w500smf.(none)>
* cifs: fix parsing of password mount optionSuresh Jayaraman2012-06-121-15/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The double delimiter check that allows a comma in the password parsing code is unconditional. We set "tmp_end" to the end of the string and we continue to check for double delimiter. In the case where the password doesn't contain a comma we end up setting tmp_end to NULL and eventually setting "options" to "end". This results in the premature termination of the options string and hence the values of UNCip and UNC are being set to NULL. This results in mount failure with "Connecting to DFS root not implemented yet" error. This error is usually not noticable as we have password as the last option in the superblock mountdata. But when we call expand_dfs_referral() from cifs_mount() and try to compose mount options for the submount, the resulting mountdata will be of the form ",ver=1,user=foo,pass=bar,ip=x.x.x.x,unc=\\server\share" and hence results in the above error. This bug has been seen with older NAS servers running Samba 3.0.24. Fix this by moving the double delimiter check inside the conditional loop. Changes since -v1 - removed the wrong strlen() micro optimization. Signed-off-by: Suresh Jayaraman <sjayaraman@suse.com> Acked-by: Sachin Prabhu <sprabhu@redhat.com> Cc: stable@vger.kernel.org [3.1+] Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Move get_next_mid to ops structPavel Shilovsky2012-06-011-1/+1
| | | | | | Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Make accessing is_valid_oplock/dump_detail ops struct field safePavel Shilovsky2012-06-011-2/+4
| | | | | Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Introduce SMB2 mounts as vers=2.1Steve French2012-05-231-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | As with Linux nfs client, which uses "nfsvers=" or "vers=" to indicate which protocol to use for mount, specifying "vers=2.1" will force an SMB2 mount. When vers is not specified CIFS is used "vers=1" We can eventually autonegotiate down from SMB2 to CIFS when SMB2 is stable enough to make it the default, but this is for the future. At that time we could also implement a "maxprotocol" mount option as smbclient and Samba have today, but that would be premature until SMB2 is stable. Intially the SMB2 Kconfig option will depend on "BROKEN" until the merge is complete, and then be "EXPERIMENTAL" When it is no longer experimental we can consider changing the default protocol to attempt first. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Move add/set_credits and get_credits_field to ops structurePavel Shilovsky2012-05-231-2/+2
| | | | | | | Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Move protocol specific demultiplex thread calls to ops structPavel Shilovsky2012-05-231-23/+4Star
| | | | | | Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Move header_size/max_header_size to ops structurePavel Shilovsky2012-05-231-8/+9
| | | | | | | Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: add a smb_version_operations/values structures and a smb_version enumJeff Layton2012-05-171-1/+41
| | | | | | | | | | | We need a way to dispatch different operations for different versions. Behold the smb_version_operations/values structures. For now, those structures just hold the version enum value and nothing uses them. Eventually, we'll expand them to cover other operations/values as we change the callers to dispatch from here. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
* cifs: remove the vers= and version= synonyms for ver=Jeff Layton2012-05-171-4/+1Star
| | | | | | | | We want these to mean something different entirely, and the mount.cifs helper only ever passed in ver= automatically. Also, don't allow ver=cifs anymore since that was never passed in by the mount helper. Signed-off-by: Jeff Layton <jlayton@redhat.com>
* cifs: add warning about change in default cache semantics in 3.7Jeff Layton2012-05-171-0/+13
| | | | | | | | | Add a warning that will be displayed when there is no cache= option specified. We want to ensure that users are aware of the change in defaults coming in 3.7. Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Jeff Layton <jlayton@redhat.com>
* cifs: add deprecation warnings to strictcache and forcedirectioJeff Layton2012-05-171-0/+6
| | | | | | | Leave them in for 2 releases and remove for 3.7. Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Jeff Layton <jlayton@redhat.com>
* cifs: add a cache= option to better describe the different cache flavorsJeff Layton2012-05-171-3/+54
| | | | | | | | | | | | | | | Currently, we have several mount options that control cifs' cache behavior, but those options aren't considered to be mutually exclusive. The result is poorly-defined when someone specifies more than one of these options at mount time. Fix this by adding a new cache= mount option that will supercede "strictcache", and "forcedirectio". That will help make it clear that these options are mutually exclusive. Also, change the legacy options to be mutually exclusive too, to ensure that users don't get surprises. Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Jeff Layton <jlayton@redhat.com>
* cifs: fix misspelling of "forcedirectio"Jeff Layton2012-05-161-1/+2
| | | | | | | | | ...and add a "directio" synonym since that's what the manpage has always advertised. Acked-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: make sure we ignore the credentials= and cred= optionsJeff Layton2012-05-031-0/+2
| | | | | | | | | | | | | | Older mount.cifs programs passed this on to the kernel after parsing the file. Make sure the kernel ignores that option. Should fix: https://bugzilla.kernel.org/show_bug.cgi?id=43195 Cc: Sachin Prabhu <sprabhu@redhat.com> Reported-by: Ronald <ronald645@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: add missing initialization of server->req_lockJeff Layton2012-05-021-0/+1
| | | | | | Cc: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: don't cap ra_pages at the same level as default_backing_dev_infoJeff Layton2012-05-021-17/+1Star
| | | | | | | | | | | | | | | | | While testing, I've found that even when we are able to negotiate a much larger rsize with the server, on-the-wire reads often end up being capped at 128k because of ra_pages being capped at that level. Lifting this restriction gave almost a twofold increase in sequential read performance on my craptactular KVM test rig with a 1M rsize. I think this is safe since the actual ra_pages that the VM requests is run through max_sane_readahead() prior to submitting the I/O. Under memory pressure we should end up with large readahead requests being suppressed anyway. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Show backupuid/gid in /proc/mountsSachin Prabhu2012-04-241-6/+6
| | | | | | | | | | | | | Show backupuid/backupgid in /proc/mounts for cifs shares mounted with the backupuid/backupgid feature. Also consolidate the two separate checks for pvolume_info->backupuid_specified into a single if condition in cifs_setup_cifs_sb(). Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Fix number parsing in cifs_parse_mount_optionsSachin Prabhu2012-04-131-1/+1
| | | | | | | | | | | | | | | The function kstrtoul() used to parse number strings in the mount option parser is set to expect a base 10 number . This treats the octal numbers passed for mount options such as file_mode as base10 numbers leading to incorrect behavior. Change the 'base' argument passed to kstrtoul from 10 to 0 to allow it to auto-detect the base of the number passed. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Acked-by: Jeff Layton <jlayton@samba.org> Reported-by: Chris Clayton <chris2553@googlemail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Cleanup handling of NULL value passed for a mount optionSachin Prabhu2012-04-121-61/+19Star
| | | | | | | | | | | | Allow blank user= and ip= mount option. Also clean up redundant checks for NULL values since the token parser will not actually match mount options with NULL values unless explicitly specified. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reported-by: Chris Clayton <chris2553@googlemail.com> Acked-by: Jeff Layton <jlayton@samba.org> Tested-by: Chris Clayton <chris2553@googlemail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Fix UNC parsing on mountSachin Prabhu2012-04-041-7/+7
| | | | | | | | | | The code cleanup of cifs_parse_mount_options resulted in a new bug being introduced in the parsing of the UNC. This results in vol->UNC being modified before vol->UNC was allocated. Reported-by: Steve French <smfrench@gmail.com> Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Remove unnecessary check for NULL in password parserSachin Prabhu2012-04-041-2/+1Star
| | | | | | | | | | | The password parser has an unnecessary check for a NULL value which triggers warnings in source checking tools. The code contains artifacts from the old parsing code which are no longer required. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Add missed forcemand mount optionPavel Shilovsky2012-03-271-2/+5
| | | | | | | | | | | The 'forcemand' form of 'forcemandatorylock' mount option was missed when the code moved to use the standard token parser. Return it back. Also fix a comment style in the parser. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: handle "sloppy" option appropriatelyJeff Layton2012-03-231-3/+18
| | | | | | | | | | | | | | | | | | | | | cifs.ko has historically been tolerant of options that it does not recognize. This is not normal behavior for a filesystem however. Usually, it should only do this if you mount with '-s', and autofs generally passes -s to the mount command to allow this behavior. This patch makes cifs handle the option "sloppy" appropriately. If it's present in the options string, then the client will tolerate options that it doesn't recognize. If it's not present then the client will error out in the presence of options that it does not recognize and throw an error message explaining why. There is also a companion patch being proposed for mount.cifs to make it append "sloppy" to the mount options when passed the '-s' flag. This also should (obviously) be applied on top of Sachin's conversion to the standard option parser. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-By: Sachin Prabhu <sprabhu@redhat.com>
* cifs: use standard token parser for mount optionsSachin Prabhu2012-03-231-524/+814
| | | | | | | | | | | | | | | | | | | | | Use the standard token parser instead of the long if condition to parse cifs mount options. This was first proposed by Scott Lovenberg http://lists.samba.org/archive/linux-cifs-client/2010-May/006079.html Mount options have been grouped together in terms of their input types. Aliases for username, password, domain and credentials have been added. The password parser has been modified to make it easier to read. Since the patch was first proposed, the following bugs have been fixed 1) Allow blank 'pass' option to be passed by the cifs mount helper when using sec=none. 2) Do not explicitly set vol->nullauth to 0. This causes a problem when using sec=none while also using a username. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com>
* cifs: add new cifsiod_wq workqueueJeff Layton2012-03-231-4/+4
| | | | | | | | | | ...and convert existing cifs users of system_nrt_wq to use that instead. Also, make it freezable, and set WQ_MEM_RECLAIM since we use it to deal with write reply handling. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
* CIFS: Change mid_q_entry structure fieldsPavel Shilovsky2012-03-231-11/+11
| | | | | | | to be protocol-unspecific and big enough to keep both CIFS and SMB2 values. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
* CIFS: Separate protocol-specific code from cifs_readv_receive codePavel Shilovsky2012-03-231-12/+0Star
| | | | Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
* CIFS: Separate protocol-specific code from demultiplex codePavel Shilovsky2012-03-231-36/+42
| | | | Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
* CIFS: Delete echo_retries module parmPavel Shilovsky2012-03-211-4/+14
| | | | | | | | | | | It's the essential step before respecting MaxMpxCount value during negotiating because we will keep only one extra slot for sending echo requests. If there is no response during two echo intervals - reconnect the tcp session. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Introduce credit-based flow controlPavel Shilovsky2012-03-211-8/+6Star
| | | | | | | | | | and send no more than credits value requests at once. For SMB/CIFS it's trivial: increment this value by receiving any message and decrement by sending one. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Simplify inFlight logicPavel Shilovsky2012-03-211-5/+5
| | | | | | | | | by making it as unsigned integer and surround access with req_lock from server structure. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: fix issue mounting of DFS ROOT when redirecting from one domain ↵Jeff Layton2012-03-211-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | controller to the next This patch fixes an issue when cifs_mount receives a STATUS_BAD_NETWORK_NAME error during cifs_get_tcon but is able to continue after an DFS ROOT referral. In this case, the return code variable is not reset prior to trying to mount from the system referred to. Thus, is_path_accessible is not executed and the final DFS referral is not performed causing a mount error. Use case: In DNS, example.com resolves to the secondary AD server ad2.example.com Our primary domain controller is ad1.example.com and has a DFS redirection set up from \\ad1\share\Users to \\files\share\Users. Mounting \\example.com\share\Users fails. Regression introduced by commit 724d9f1. Cc: stable@vger.kernel.org Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru Signed-off-by: Thomas Hadig <thomas@intapp.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Respect negotiated MaxMpxCountPavel Shilovsky2012-03-201-7/+4Star
| | | | | | | | | | | Some servers sets this value less than 50 that was hardcoded and we lost the connection if when we exceed this limit. Fix this by respecting this value - not sending more than the server allows. Cc: stable@kernel.org Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <stevef@smf-gateway.(none)>
* cifs: don't return error from standard_receive3 after marking response malformedJeff Layton2012-02-081-3/+4
| | | | | | | | | | | | | | | | | | | standard_receive3 will check the validity of the response from the server (via checkSMB). It'll pass the result of that check to handle_mid which will dequeue it and mark it with a status of MID_RESPONSE_MALFORMED if checkSMB returned an error. At that point, standard_receive3 will also return an error, which will make the demultiplex thread skip doing the callback for the mid. This is wrong -- if we were able to identify the request and the response is marked malformed, then we want the demultiplex thread to do the callback. Fix this by making standard_receive3 return 0 in this situation. Cc: stable@vger.kernel.org Reported-and-Tested-by: Mark Moseley <moseleymark@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>