Described steps to reproduce git annex get failure on SMB share
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### Please describe the problem.
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I have a Synology DS216+ NAS, which can export shares via SMB2, AFP or NFS. Since I have a lot of "media" data in git-annex, I'd like to be able to put a useful copy of that data (ie, original file names) onto the NAS, and have git-annex track that content as another "local" copy of the content that is available (rather than having to track it by hand).
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Because the NFS shares have UID mapping issues (AFAICT NFS v4 id mapping is not supported without Kerberos authentication, due to changes since about Linux 3.4; the Synology is based on a Linux 3.10 kernel), I have been trying to use SMBv2 shares, with symlinks enabled ("Allow symbolic links within shared folders"). I'm aware that `git-annex` on a network file system is less supported, but this is still a use case that would be quite useful to manage larger pools of files.
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After updating to the latest release (to [fix git annex init timeouts](https://git-annex.branchable.com/forum/git_annex_init_timeout/)), I am able to complete the `git clone ...`, `git annex init`, and `git sync` steps. (The SMB mount supports symlinks, but not hard links; hence pidlocks being needed.)
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But `git annex get` or `git annex copy` to transfer any of the content files fails with:
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get README (transfer already in progress, or unable to take transfer lock)
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Unable to access these remotes: ashram-data
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whether initiated from the SMB mounted `git-annex` or a `git-annex` with the data on a local file system. No content files get transferred.
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Of note, on this "SMB share with symlinks enabled" I can manually create symlinks, but `git annex` still detects symlinks as not possible and switches to direct mode. However it leaves the existing symlinks from `git clone ...` in place. It is unclear to me whether this is part of the cause of the "transfer lock" issue, or whether the transfer locks are, eg, not using pidlocks and thus failing because flock() does not work.
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### What steps will reproduce the problem?
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* Mount a remote file system via SMB v2, with symlinks enabled (eg mounting from a Samba share should be sufficient, as that's what is running on the Synology NAS)
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* `git clone` an existing `git-annex` onto a directory on that SMB mounted filesystem
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* `git remote ....` configure one or more remotes with the file data
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* `git annex init "SMB share"`
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* `git annex sync`
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* `git annex get ....` of an existing file
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or alternatively after the init/sync, go to a source `git-annex` and do:
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* `git remote add smb ....`
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* `git annex sync`
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* `git annex copy --to=smb ...` of an existing file with content in that `git-annex`
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### What version of git-annex are you using? On what operating system?
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`git-annex` 6.20170320 (downloaded 2017-04-23) on Mac OS X 10.11 (El Capitan):
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ewen@ashram:~$ uname -a
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Darwin ashram 15.6.0 Darwin Kernel Version 15.6.0: Fri Feb 17 10:21:18 PST 2017; root:xnu-3248.60.11.4.1~1/RELEASE_X86_64 x86_64
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ewen@ashram:~$ git annex version
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git-annex version: 6.20170320-g41c5d9d
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build flags: Assistant Webapp Pairing Testsuite S3(multipartupload)(storageclasses) WebDAV FsEvents ConcurrentOutput TorrentParser MagicMime Feeds Quvi
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key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 SHA1E SHA1 MD5E MD5 WORM URL
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remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav tahoe glacier ddar hook external
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ewen@ashram:~$
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### Please provide any additional information below.
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[[!format sh """
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# Example session
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ewen@ashram:/nas01/annex/purchased$ git clone /bkup/purchased/mediabytes
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Cloning into 'mediabytes'...
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done.
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ewen@ashram:/nas01/annex/purchased$ cd mediabytes/
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git remote add ashram-data /data/purchased/mediabytes
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git remote add ashram /bkup/purchased/mediabytes
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git remote remove origin
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git annex init 'nas01 file server'
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init nas01 file server
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Detected a filesystem without POSIX fcntl lock support.
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Enabling annex.pidlock.
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Detected a filesystem without fifo support.
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Disabling ssh connection caching.
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Detected a crippled filesystem.
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Disabling core.symlinks.
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Enabling direct mode.
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ok
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(recording state in git...)
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git annex sync
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commit ok
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pull ashram
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From /bkup/purchased/mediabytes
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* [new branch] git-annex -> ashram/git-annex
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* [new branch] master -> ashram/master
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* [new branch] synced/git-annex -> ashram/synced/git-annex
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* [new branch] synced/master -> ashram/synced/master
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ok
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pull ashram-data
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From /data/purchased/mediabytes
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* [new branch] git-annex -> ashram-data/git-annex
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* [new branch] master -> ashram-data/master
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* [new branch] synced/git-annex -> ashram-data/synced/git-annex
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* [new branch] synced/master -> ashram-data/synced/master
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ok
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(merging ashram-data/git-annex into git-annex...)
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(recording state in git...)
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push ashram
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Counting objects: 8, done.
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Delta compression using up to 8 threads.
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Compressing objects: 100% (6/6), done.
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Writing objects: 100% (8/8), 806 bytes | 0 bytes/s, done.
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Total 8 (delta 2), reused 1 (delta 0)
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To /bkup/purchased/mediabytes
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02b7699..0edf575 git-annex -> synced/git-annex
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ok
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push ashram-data
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Counting objects: 8, done.
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Delta compression using up to 8 threads.
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Compressing objects: 100% (6/6), done.
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Writing objects: 100% (8/8), 806 bytes | 0 bytes/s, done.
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Total 8 (delta 2), reused 1 (delta 0)
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To /data/purchased/mediabytes
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02b7699..0edf575 git-annex -> synced/git-annex
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ok
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git annex sync
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commit ok
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pull ashram
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ok
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pull ashram-data
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ok
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git annex get .
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get README (transfer already in progress, or unable to take transfer lock)
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Unable to access these remotes: ashram-data
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Try making some of these repositories available:
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00420eb2-1c9a-47e8-abfa-675b9ffb0782 -- naos_wd_1 backup drive
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0ac1326e-9e03-4c1e-bd51-6cd664988caa -- Naos (colo) fileserver
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0e5fd428-ba5b-4817-8489-9780bc62e655 -- naos_wd_2 backup drive
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1144edcc-b18f-4cb1-a828-6c272d7788d6 -- naos_wd_3 backup drive
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6142cfd4-83ba-410f-bf54-fd4b79e49fdb -- ashram external data drive [ashram-data]
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77aeca6a-a4f8-4734-befc-2a0b50687c52 -- tv home fileserver
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cc1c45f3-7c96-4103-b9c0-cce0f5f2cc36 -- bethel_data_drive
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eb0ca2b6-e8c6-43b0-a805-de17a4d7eeae -- naos_wd_4 backup drive
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failed
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get alex-lindsay-1.m4a (transfer already in progress, or unable to take transfer lock)
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Unable to access these remotes: ashram-data
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Try making some of these repositories available:
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00420eb2-1c9a-47e8-abfa-675b9ffb0782 -- naos_wd_1 backup drive
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0ac1326e-9e03-4c1e-bd51-6cd664988caa -- Naos (colo) fileserver
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0e5fd428-ba5b-4817-8489-9780bc62e655 -- naos_wd_2 backup drive
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1144edcc-b18f-4cb1-a828-6c272d7788d6 -- naos_wd_3 backup drive
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6142cfd4-83ba-410f-bf54-fd4b79e49fdb -- ashram external data drive [ashram-data]
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77aeca6a-a4f8-4734-befc-2a0b50687c52 -- tv home fileserver
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cc1c45f3-7c96-4103-b9c0-cce0f5f2cc36 -- bethel_data_drive
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eb0ca2b6-e8c6-43b0-a805-de17a4d7eeae -- naos_wd_4 backup drive
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failed
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[...]
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[...]
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failed
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git-annex: get: 59 failed
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ewen@ashram:/nas01/annex/purchased/mediabytes$
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ewen@ashram:/nas01/annex/purchased/mediabytes$ ls -l | head
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total 118
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lrwx------ 1 ewen staff 182 23 Apr 18:53 README -> .git/annex/objects/3M/8w/SHA256E-s273--1eb5c07e12d99c99af8c163b5e005162820518020cc9922152852bd1422858ae/SHA256E-s273--1eb5c07e12d99c99af8c163b5e005162820518020cc9922152852bd1422858ae
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lrwx------ 1 ewen staff 200 23 Apr 18:53 alex-lindsay-1.m4a -> .git/annex/objects/9M/xJ/SHA256E-s26905448--c8ecda8ca67c3ff8ab1061b34a2974be41eb4b44421e3c39d1dda63f4de6b910.m4a/SHA256E-s26905448--c8ecda8ca67c3ff8ab1061b34a2974be41eb4b44421e3c39d1dda63f4de6b910.m4a
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lrwx------ 1 ewen staff 194 23 Apr 18:53 alexlindsay.txt -> .git/annex/objects/P7/7g/SHA256E-s17467--2e7ae57eff6db5a832681443eb3787d1d7f9e57a52e4fedb2b693136a3df19f0.txt/SHA256E-s17467--2e7ae57eff6db5a832681443eb3787d1d7f9e57a52e4fedb2b693136a3df19f0.txt
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lrwx------ 1 ewen staff 198 23 Apr 18:53 bourne-1.mp3 -> .git/annex/objects/98/vg/SHA256E-s7560841--a24ce7acabcb0dd46b9a9df6df8aff50145d8b1d5253308a51573a7742652943.mp3/SHA256E-s7560841--a24ce7acabcb0dd46b9a9df6df8aff50145d8b1d5253308a51573a7742652943.mp3
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lrwx------ 1 ewen staff 192 23 Apr 18:53 bourne.txt -> .git/annex/objects/QK/2p/SHA256E-s1031--d45a0f0aba935126bf29d6265e9c252faae8b735abdc20edbec69eb3cc9edcd7.txt/SHA256E-s1031--d45a0f0aba935126bf29d6265e9c252faae8b735abdc20edbec69eb3cc9edcd7.txt
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lrwx------ 1 ewen staff 200 23 Apr 18:53 chasejarvis-1.m4a -> .git/annex/objects/M1/8z/SHA256E-s80616681--d1b63892a9d68c51ddef9eb5c0a56ced795a449afe13d4884663ca6ecc76cade.m4a/SHA256E-s80616681--d1b63892a9d68c51ddef9eb5c0a56ced795a449afe13d4884663ca6ecc76cade.m4a
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lrwx------ 1 ewen staff 194 23 Apr 18:53 chasejarvis.txt -> .git/annex/objects/35/jv/SHA256E-s50443--687b0cf63cc8f5724e3a694e1de6221ca4d1dd3449a6e6ad9b6f34501bfa30ce.txt/SHA256E-s50443--687b0cf63cc8f5724e3a694e1de6221ca4d1dd3449a6e6ad9b6f34501bfa30ce.txt
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lrwx------ 1 ewen staff 184 23 Apr 18:53 checksums -> .git/annex/objects/3Q/vv/SHA256E-s1672--31b3cb7ccbcafc96d5061775dc31aa974bb4ce2f16984b2ab0104eb66674d81b/SHA256E-s1672--31b3cb7ccbcafc96d5061775dc31aa974bb4ce2f16984b2ab0104eb66674d81b
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lrwx------ 1 ewen staff 200 23 Apr 18:53 chrismarquardt-1.m4a -> .git/annex/objects/k4/f3/SHA256E-s61861112--c14bacb5adfe3eca237547760183a986499808084dd1925a0202598981e4406b.m4a/SHA256E-s61861112--c14bacb5adfe3eca237547760183a986499808084dd1925a0202598981e4406b.m4a
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ewen@ashram:/nas01/annex/purchased/mediabytes$
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ewen@ashram:/nas01/annex/purchased/mediabytes$ git annex info
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repository mode: direct
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trusted repositories: 0
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semitrusted repositories: 13
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00000000-0000-0000-0000-000000000001 -- web
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00000000-0000-0000-0000-000000000002 -- bittorrent
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00420eb2-1c9a-47e8-abfa-675b9ffb0782 -- naos_wd_1 backup drive
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0ac1326e-9e03-4c1e-bd51-6cd664988caa -- Naos (colo) fileserver
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0ba93724-85a8-4ac7-855b-e656a6abaf09 -- ashram (laptop) internal drive [ashram]
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0e5fd428-ba5b-4817-8489-9780bc62e655 -- naos_wd_2 backup drive
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1144edcc-b18f-4cb1-a828-6c272d7788d6 -- naos_wd_3 backup drive
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4e5bfc02-1adc-44d2-a60a-885d9120ed5d -- nas01 file server [here]
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6142cfd4-83ba-410f-bf54-fd4b79e49fdb -- ashram external data drive [ashram-data]
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77aeca6a-a4f8-4734-befc-2a0b50687c52 -- tv home fileserver
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bde87f8e-4740-411f-b068-3dbbd9db03d4 -- nas01 file server
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cc1c45f3-7c96-4103-b9c0-cce0f5f2cc36 -- bethel_data_drive
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eb0ca2b6-e8c6-43b0-a805-de17a4d7eeae -- naos_wd_4 backup drive
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untrusted repositories: 0
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transfers in progress: none
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available local disk space: 3.63 terabytes (+1 megabyte reserved)
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local annex keys: 0
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local annex size: 0 bytes
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annexed files in working tree: 59
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size of annexed files in working tree: 1.67 gigabytes
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bloom filter size: 32 mebibytes (0% full)
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backend usage:
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SHA256E: 59
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ewen@ashram:/nas01/annex/purchased/mediabytes$
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"""]]
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For reference Synology DS216+ `/etc/samba/smb.conf`:
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ewen@nas01:/volume1$ cat /etc/samba/smb.conf
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[global]
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printcap name=cups
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winbind enum groups=yes
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include=/var/tmp/nginx/smb.netbios.aliases.conf
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min protocol=SMB2
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security=user
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local master=no
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realm=*
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passdb backend=smbpasswd
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printing=cups
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max protocol=SMB3
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winbind enum users=yes
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load printers=yes
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workgroup=WORKGROUP
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ewen@nas01:/volume1$
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and the relevant share:
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ewen@nas01:/volume1$ cat /etc/samba/smb.share.conf
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[annex]
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recycle bin admin only=no
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ftp disable modify=no
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ftp disable download=no
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write list=nobody,nobody
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browseable=yes
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mediaindex=no
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hide unreadable=no
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win share=yes
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enable recycle bin=no
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invalid users=nobody,nobody
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read list=nobody,nobody
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ftp disable list=no
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edit synoacl=yes
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valid users=nobody,nobody
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writeable=yes
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guest ok=yes
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path=/volume1/annex
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skip smb perm=yes
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comment="Git Annexes"
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[music]
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[...]
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ewen@nas01:/volume1$
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### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
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I'm an extremely regular user of git-annex on OS X and Linux, for several years, using it as a podcatcher and to manage most of my "large file" media. It's one of those "couldn't live without" tools. Thanks for writing it.
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