Bug 1024181

Unicode filenames on a GlusterFS volume result in unexpected behaviour. 
 - When trying to list in that directory, ls hangs (relevant sections of strace below) 
 - When copying files via SCP, a remote client will receive the contents of a directory repeatedly in a loop[1]
 - Using ls2[2] sample code to try and rule out if it was an ls issue originally, the directory listing repeats in a loop - which leads me to believe:

It looks like the getdents call never gets to the 'end' of a directory, e.g.:

Affected directory on a GlusterFS volume:

getdents(3, /* 2 entries */, 32768)     = 48
getdents(3, /* 1 entries */, 32768)     = 56
getdents(3, /* 1 entries */, 32768)     = 56
[last line repeats]

Unaffected directory on local disk:

getdents(3, /* 5 entries */, 32768)     = 144
getdents(3, /* 0 entries */, 32768)     = 0
close(3)                                = 0


The test system in question is Debian Squeeze, 3.4.55 kernel, libc 2.11.3-4, Gluster 3.3.1-1.

I have not yet ruled out this being a kernel/glibc/etc problem, but I'm conscious that since I can only reproduce it on a GlusterFS volume it may be unlikely. I've raised this against the fuse component - but that's possibly a misnomer, apologies if so. I hope I've included enough information about the GlusterFS configuration below - but I'm happy to provide anything more as necessary.

[1] » scp -r gluster1:/ajs/testdir .
スミス                                                                                                                                                      100%    0     0.0KB/s   00:00
スミス                                                                                                                                                      100%    0     0.0KB/s   00:00
スミス                                                                                                                                                      100%    0     0.0KB/s   00:00
[repeats]

[2] http://www.johnloomis.org/ece537/notes/Files/Examples/ls2.html

[3]

Volume Name: shared
Type: Distribute
Volume ID: c89a941a-591c-4e65-88bd-8be7878be4ff
Status: Started
Number of Bricks: 6
Transport-type: tcp
Bricks:
Brick1: ca1.gl:/data0/gluster
Brick2: ca1.gl:/data1/gluster
Brick3: ca1.gl:/data2/gluster
Brick4: ca1.gl:/data3/gluster
Brick5: ca1.gl:/data4/gluster
Brick6: ca1.gl:/data5/gluster
Options Reconfigured:
nfs.disable: on
performance.flush-behind: on
performance.io-thread-count: 32
performance.write-behind-window-size: 128MB
performance.cache-size: 2048MB
performance.cache-refresh-timeout: 60