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* nfsd: reorganize nfsd_createJ. Bruce Fields2016-08-041-2/+2
| | | | | | | | | | | | There's some odd logic in nfsd_create() that allows it to be called with the parent directory either locked or unlocked. The only already-locked caller is NFSv2's nfsd_proc_create(). It's less confusing to split out the unlocked case into a separate function which the NFSv2 code can call directly. Also fix some comments while we're here. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: remove redundant zero-length check from createJ. Bruce Fields2016-08-041-3/+0
| | | | | | | | | | | | | lookup_one_len already has this check. The only effect of this patch is to return access instead of perm in the 0-length-filename case. I actually prefer nfserr_perm (or _inval?), but I doubt anyone cares. The isdotent check seems redundant too, but I worry that some client might actually care about that strange nfserr_exist error. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: Disable NFSv2 timestamp workaround for NFSv3+Andreas Gruenbacher2015-05-291-2/+50
| | | | | | | | | | | | | | | | | | NFSv2 can set the atime and/or mtime of a file to specific timestamps but not to the server's current time. To implement the equivalent of utimes("file", NULL), it uses a heuristic. NFSv3 and later do support setting the atime and/or mtime to the server's current time directly. The NFSv2 heuristic is still enabled, and causes timestamps to be set wrong sometimes. Fix this by moving the heuristic into the NFSv2 specific code. We can leave it out of the create code path: the owner can always set timestamps arbitrarily, and the workaround would never trigger. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* VFS: normal filesystems (and lustre): d_inode() annotationsDavid Howells2015-04-151-2/+2
| | | | | | | that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfsd: print status when nfsd4_open fails to open file it just createdJeff Layton2014-07-301-0/+1
| | | | | | | | | | | | | | It's possible for nfsd to fail opening a file that it has just created. When that happens, we throw a WARN but it doesn't include any info about the error code. Print the status code to give us a bit more info. Our QA group hit some of these warnings under some very heavy stress testing. My suspicion is that they hit the file-max limit, but it's hard to know for sure. Go ahead and add a -ENFILE mapping to nfserr_serverfault to make the error more distinct (and correct). Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: add a nfserrno mapping for -E2BIG to nfserr_fbigJeff Layton2014-07-101-1/+2
| | | | | | | | | | | | | | | | | | | | I saw this pop up with some pynfs testing: [ 123.609992] nfsd: non-standard errno: -7 ...and -7 is -E2BIG. I think what happened is that XFS returned -E2BIG due to some xattr operations with the ACL10 pynfs TEST (I guess it has limited xattr size?). Add a better mapping for that error since it's possible that we'll need it. How about we convert it to NFSERR_FBIG? As Bruce points out, they both have "BIG" in the name so it must be good. Also, turn the printk in this function into a WARN() so that we can get a bit more information about situations that don't have proper mappings. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* NFSD: Remove iattr parameter from nfsd_symlink()Kinglong Mee2014-07-081-3/+1
| | | | | | | | | Commit db2e747b1499 (vfs: remove mode parameter from vfs_symlink()) have remove mode parameter from vfs_symlink. So that, iattr isn't needed by nfsd_symlink now, just remove it. Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: let nfsd_symlink assume null-terminated dataJ. Bruce Fields2014-07-081-1/+1
| | | | | | | | | | | | | | | | Currently nfsd_symlink has a weird hack to serve callers who don't null-terminate symlink data: it looks ahead at the next byte to see if it's zero, and copies it to a new buffer to null-terminate if not. That means callers don't have to null-terminate, but they *do* have to ensure that the byte following the end of the data is theirs to read. That's a bit subtle, and the NFSv4 code actually got this wrong. So let's just throw out that code and let callers pass null-terminated strings; we've already fixed them to do that. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: make NFSv2 null terminate symlink dataJ. Bruce Fields2014-07-081-1/+4
| | | | | | | | | | It's simple enough for NFSv2 to null-terminate the symlink data. A bit weird (it depends on knowing that we've already read the following byte, which is either padding or part of the mode), but no worse than the conditional kstrdup it otherwise relies on in nfsd_symlink(). Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* switch vfs_getattr() to struct pathAl Viro2013-02-261-9/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfsd: Push mnt_want_write() outside of i_mutexJan Kara2012-07-301-1/+8
| | | | | | | | | | | When mnt_want_write() starts to handle freezing it will get a full lock semantics requiring proper lock ordering. So push mnt_want_write() call consistently outside of i_mutex. CC: linux-nfs@vger.kernel.org CC: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfsd4: return nfs errno from name_to_id functionsJ. Bruce Fields2011-01-051-1/+0
| | | | | | This avoids the need for the confusing ESRCH mapping. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd4: name->id mapping should fail with BADOWNER not BADNAMEJ. Bruce Fields2011-01-051-1/+1
| | | | | | | | | | | | | According to rfc 3530 BADNAME is for strings that represent paths; BADOWNER is for user/group names that don't map. And the too-long name should probably be BADOWNER as well; it's effectively the same as if we couldn't map it. Cc: stable@kernel.org Reported-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reported-by: Simon Kirby <sim@hostway.ca> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: stop translating EAGAIN to nfserr_dropitJ. Bruce Fields2011-01-041-1/+2
| | | | | | | | | We no longer need this. Also, EWOULDBLOCK is generally a synonym for EAGAIN, but that may not be true on all architectures, so map it as well. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: don't drop requests on -ENOMEMJ. Bruce Fields2011-01-041-1/+1
| | | | | | | | | We never want to drop a request if we could return a JUKEBOX/DELAY error instead; so, convert to nfserr_jukebox and let nfsd_dispatch() convert that to a dropit error as a last resort if JUKEBOX/DELAY is unavailable (as in the NFSv2 case). Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: minor nfsd read api cleanupJ. Bruce Fields2010-07-301-1/+1
| | | | | | | | | Christoph points that the NFSv2/v3 callers know which case they want here, so we may as well just call the file=NULL case directly instead of making this conditional. Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* gcc-4.6: nfsd: fix initialized but not read warningsAndi Kleen2010-07-301-2/+0
| | | | | | | | | | | | | | | | | | | | | Fixes at least one real minor bug: the nfs4 recovery dir sysctl would not return its status properly. Also I finished Al's 1e41568d7378d ("Take ima_path_check() in nfsd past dentry_open() in nfsd_open()") commit, it moved the IMA code, but left the old path initializer in there. The rest is just dead code removed I think, although I was not fully sure about the "is_borc" stuff. Some more review would be still good. Found by gcc 4.6's new warnings. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: remove pointless paths in file headersJ. Bruce Fields2009-12-151-3/+0
| | | | | | | | The new .h files have paths at the top that are now out of date. While we're here, just remove all of those from fs/nfsd; they never served any purpose. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd: Move private headers to source directoryBoaz Harrosh2009-12-151-2/+2
| | | | | | | | Lots of include/linux/nfsd/* headers are only used by nfsd module. Move them to the source directory Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd: Source files #include cleanupsBoaz Harrosh2009-12-151-13/+0
| | | | | | | | | | | Now that the headers are fixed and carry their own wait, all fs/nfsd/ source files can include a minimal set of headers. and still compile just fine. This patch should improve the compilation speed of the nfsd module. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd: make fs/nfsd/vfs.h for common includesJ. Bruce Fields2009-11-131-0/+1
| | | | | | | | | | None of this stuff is used outside nfsd, so move it out of the common linux include directory. Actually, probably none of the stuff in include/linux/nfsd/nfsd.h really belongs there, so later we may remove that file entirely. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd4: fix error return when pseudoroot missingJ. Bruce Fields2009-09-281-0/+1
| | | | | | | | | | | | | We really shouldn't hit this case at all, and forthcoming kernel and nfs-utils changes should eliminate this case; if it does happen, consider it a bug rather than reporting an error that doesn't really make sense for the operation (since there's no reason for a server to be accepting v4 traffic yet have no root filehandle). Also move some exp_pseudoroot code into a helper function while we're here. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NFS: kill off complicated macro 'PROC'Yu Zhiguo2009-06-161-32/+166
| | | | | | | | | | | kill off obscure macro 'PROC' of NFSv2&3 in order to make the code more clear. Among other things, this makes it simpler to grep for callers of these functions--something which has frequently caused confusion among nfs developers. Signed-off-by: Yu Zhiguo <yuzg@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* Short write in nfsd becomes a full write to the clientDavid Shaw2009-03-181-1/+2
| | | | | | | | | | | | | | | | | | | | | | If a filesystem being written to via NFS returns a short write count (as opposed to an error) to nfsd, nfsd treats that as a success for the entire write, rather than the short count that actually succeeded. For example, given a 8192 byte write, if the underlying filesystem only writes 4096 bytes, nfsd will ack back to the nfs client that all 8192 bytes were written. The nfs client does have retry logic for short writes, but this is never called as the client is told the complete write succeeded. There are probably other ways it could happen, but in my case it happened with a fuse (filesystem in userspace) filesystem which can rather easily have a partial write. Here is a patch to properly return the short write count to the client. Signed-off-by: David Shaw <dshaw@jabberwocky.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd: add etoosmall to nfserrnoDean Hildebrand2009-01-071-0/+1
| | | | | | Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd: permit unauthenticated stat of export rootJ. Bruce Fields2008-09-291-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | RFC 2623 section 2.3.2 permits the server to bypass gss authentication checks for certain operations that a client may perform when mounting. In the case of a client that doesn't have some form of credentials available to it on boot, this allows it to perform the mount unattended. (Presumably real file access won't be needed until a user with credentials logs in.) Being slightly more lenient allows lots of old clients to access krb5-only exports, with the only loss being a small amount of information leaked about the root directory of the export. This affects only v2 and v3; v4 still requires authentication for all access. Thanks to Peter Staubach testing against a Solaris client, which suggesting addition of v3 getattr, to the list, and to Trond for noting that doing so exposes no additional information. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Cc: Peter Staubach <staubach@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
* nfsd: rename MAY_ flagsMiklos Szeredi2008-06-231-4/+4
| | | | | | | | | | | Rename nfsd_permission() specific MAY_* flags to NFSD_MAY_* to make it clear, that these are not used outside nfsd, and to avoid name and number space conflicts with the VFS. [comment from hch: rename MAY_READ, MAY_WRITE and MAY_EXEC as well] Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* knfsd: nfsd: Handle ERESTARTSYS from syscalls.NeilBrown2008-06-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | OCFS2 can return -ERESTARTSYS from write requests (and possibly elsewhere) if there is a signal pending. If nfsd is shutdown (by sending a signal to each thread) while there is still an IO load from the client, each thread could handle one last request with a signal pending. This can result in -ERESTARTSYS which is not understood by nfserrno() and so is reflected back to the client as nfserr_io aka -EIO. This is wrong. Instead, interpret ERESTARTSYS to mean "try again later" by returning nfserr_jukebox. The client will resend and - if the server is restarted - the write will (hopefully) be successful and everyone will be happy. The symptom that I narrowed down to this was: copy a large file via NFS to an OCFS2 filesystem, and restart the nfs server during the copy. The 'cp' might get an -EIO, and the file will be corrupted - presumably holes in the middle where writes appeared to fail. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* Use struct path in struct svc_exportJan Blunck2008-02-151-3/+3
| | | | | | | | | | | | | | | | | I'm embedding struct path into struct svc_export. [akpm@linux-foundation.org: coding-style fixes] [ezk@cs.sunysb.edu: NFSD: fix wrong mnt_writer count in rename] Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: J. Bruce Fields <bfields@citi.umich.edu> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* knfsd: nfsd4: make readonly access depend on pseudoflavorJ. Bruce Fields2007-07-171-1/+2
| | | | | | | | | | | | Allow readonly access to vary depending on the pseudoflavor, using the flag passed with each pseudoflavor in the export downcall. The rest of the flags are ignored for now, though some day we might also allow id squashing to vary based on the flavor. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* RPC: add wrapper for svc_reserve to account for checksumJeff Layton2007-05-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the kernel calls svc_reserve to downsize the expected size of an RPC reply, it fails to account for the possibility of a checksum at the end of the packet. If a client mounts a NFSv2/3 with sec=krb5i/p, and does I/O then you'll generally see messages similar to this in the server's ring buffer: RPC request reserved 164 but used 208 While I was never able to verify it, I suspect that this problem is also the root cause of some oopses I've seen under these conditions: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=227726 This is probably also a problem for other sec= types and for NFSv4. The large reserved size for NFSv4 compound packets seems to generally paper over the problem, however. This patch adds a wrapper for svc_reserve that accounts for the possibility of a checksum. It also fixes up the appropriate callers of svc_reserve to call the wrapper. For now, it just uses a hardcoded value that I determined via testing. That value may need to be revised upward as things change, or we may want to eventually add a new auth_op that attempts to calculate this somehow. Unfortunately, there doesn't seem to be a good way to reliably determine the expected checksum length prior to actually calculating it, particularly with schemes like spkm3. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] knfsd: SUNRPC: Add a function to format the address in an svc_rqst ↵Chuck Lever2007-02-121-3/+4
| | | | | | | | | | | | | | | | | for printing There are loads of places where the RPC server assumes that the rq_addr fields contains an IPv4 address. Top among these are error and debugging messages that display the server's IP address. Let's refactor the address printing into a separate function that's smart enough to figure out the difference between IPv4 and IPv6 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] nfsd: NFSv{2,3} trivial endianness annotations for error valuesAl Viro2006-10-201-19/+21
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nfsd: nfserrno() endianness annotationsAl Viro2006-10-201-4/+3
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix svc_procfunc declarationAl Viro2006-10-201-16/+16
| | | | | | | | | | svc_procfunc instances return __be32, not int Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Prepare knfsd for support of rsize/wsize of up to 1MB, over TCPGreg Banks2006-10-041-3/+3
| | | | | | | | | | | | | | | | The limit over UDP remains at 32K. Also, make some of the apparently arbitrary sizing constants clearer. The biggest change here involves replacing NFSSVC_MAXBLKSIZE by a function of the rqstp. This allows it to be different for different protocols (udp/tcp) and also allows it to depend on the servers declared sv_bufsiz. Note that we don't actually increase sv_bufsz for nfs yet. That comes next. Signed-off-by: Greg Banks <gnb@melbourne.sgi.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Avoid excess stack usage in svc_tcp_recvfromNeilBrown2006-10-041-2/+2
| | | | | | | | | | | | | | | | | | .. by allocating the array of 'kvec' in 'struct svc_rqst'. As we plan to increase RPCSVC_MAXPAGES from 8 upto 256, we can no longer allocate an array of this size on the stack. So we allocate it in 'struct svc_rqst'. However svc_rqst contains (indirectly) an array of the same type and size (actually several, but they are in a union). So rather than waste space, we move those arrays out of the separately allocated union and into svc_rqst to share with the kvec moved out of svc_tcp_recvfrom (various arrays are used at different times, so there is no conflict). Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: nfsd: lockdep annotation fixNeilBrown2006-10-041-1/+1
| | | | | | | | nfsv2 needs the I_MUTEX_PARENT on the directory when creating a file too. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Correct reserved reply space for read requests.NeilBrown2006-04-111-1/+1
| | | | | | | | | | | | | | | | | | | | | NFSd makes sure there is enough space to hold the maximum possible reply before accepting a request. The units for this maximum is (4byte) words. However in three places, particularly for read request, the number given is a number of bytes. This means too much space is reserved which is slightly wasteful. This is the sort of patch that could uncover a deeper bug, and it is not critical, so it would be best for it to spend a while in -mm before going in to mainline. (akpm: target 2.6.17-rc2, 2.6.16.3 (approx)) Discovered-by: "Eivind Sarto" <ivan@kasenna.com> Signed-off-by: Neil Brown <neilb@suse.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Provide missing NFSv2 part of patch for checking vfs_getattr.David Shaw2006-01-191-7/+30
| | | | | | | | | | | | | | A recent patch which checked the return status of vfs_getattr in nfsd, completely missed the nfsproc.c (NFSv2) part. Here is it. This patch moved the call to vfs_getattr from the xdr encoding (at which point it is too late to return an error) to the call handling. This means several calls to vfs_getattr are needed in nfsproc.c. Many are encapsulated in nfsd_return_attrs and nfsd_return_dirop. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] NFSD: Add NFS3ERR_NOTSUPP to the nfsd error mapping tableAndreas Gruenbacher2005-06-221-0/+1
| | | | | | | | | | | Add the missing NFS3ERR_NOTSUPP error code (defined in NFSv3) to the system-to-protocol-error table in nfsd. The nfsacl extension uses this error code. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Olaf Kirch <okir@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-171-0/+605
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!