glfs_fallocate() looks completely broken on disperse volumes with sharding enabled

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glfs_fallocate() looks completely broken on disperse volumes with sharding enabled

Dmitry Antipov
(closely related to https://github.com/gluster/glusterfs/issues/1148)

1)

# prove -vf ./tests/bugs/shard/zero-flag.t
./tests/bugs/shard/zero-flag.t ..
1..34
ok   1 [    190/   1454] <  13> 'glusterd'
ok   2 [      9/      5] <  14> 'pidof glusterd'
ok   3 [      9/    201] <  15> 'gluster --mode=script --wignore volume create patchy replica 2 localhost.localdomain:/d/backends/patchy0 localhost.localdomain:/d/backends/patchy1
localhost.localdomain:/d/backends/patchy2 localhost.localdomain:/d/backends/patchy3'
ok   4 [     13/    155] <  16> 'gluster --mode=script --wignore volume set patchy features.shard on'
ok   5 [     30/    198] <  17> 'gluster --mode=script --wignore volume set patchy features.shard-block-size 4MB'
ok   6 [     30/   1463] <  18> 'gluster --mode=script --wignore volume start patchy'
ok   7 [     11/     57] <  20> '_GFS --attribute-timeout=0 --entry-timeout=0 --volfile-id=patchy --volfile-server=localhost.localdomain /mnt/glusterfs/0'
ok   8 [     10/     90] <  21> 'build_tester ./tests/bugs/shard/shard-fallocate.c -lgfapi -Wall -O2'
ok   9 [     10/      7] <  25> 'touch /mnt/glusterfs/0/tmp'
ok  10 [     13/      1] <  26> ''
ok  11 [     10/      7] <  27> 'touch /mnt/glusterfs/0/file1'
ok  12 [     20/  11049] <  31> './tests/bugs/shard/shard-fallocate localhost.localdomain patchy 0 0 6291456 /file1 /opt/glusterfs/var/log/glusterfs/glfs-patchy.log'
ok  13 [     17/      4] <  33> '6291456 stat -c %s /mnt/glusterfs/0/file1'
ok  14 [     10/      2] <  36> 'stat /d/backends/patchy0/.shard'
ok  15 [     10/      2] <  37> 'stat /d/backends/patchy1/.shard'
ok  16 [      9/      2] <  38> 'stat /d/backends/patchy2/.shard'
ok  17 [      9/      2] <  39> 'stat /d/backends/patchy3/.shard'
ok  18 [     25/      2] <  41> '2097152 echo 2097152 2097152'
ok  19 [      9/     17] <  42> '1 file_all_zeroes /mnt/glusterfs/0/file1'
ok  20 [      8/      7] <  47> 'truncate -s 6M /mnt/glusterfs/0/file2'
ok  21 [      9/      6] <  48> 'dd if=/mnt/glusterfs/0/tmp of=/mnt/glusterfs/0/file2 bs=1 seek=3145728 count=26 conv=notrunc'
ok  22 [     32/  11045] <  51> './tests/bugs/shard/shard-fallocate localhost.localdomain patchy 0 3145728 26 /file2 /opt/glusterfs/var/log/glusterfs/glfs-patchy.log'
ok  23 [     17/      4] <  53> '6291456 stat -c %s /mnt/glusterfs/0/file2'
ok  24 [     27/      2] <  54> '007d0186a1231a3a874a6aa09a1b7dcf echo 007d0186a1231a3a874a6aa09a1b7dcf'
ok  25 [      9/      7] <  59> 'touch /mnt/glusterfs/0/file3'
ok  26 [     13/      7] <  63> 'dd if=/mnt/glusterfs/0/tmp of=/mnt/glusterfs/0/file3 bs=1 seek=9437184 count=26 conv=notrunc'
ok  27 [     10/      2] <  64> '! stat /d/backends/patchy*/.shard/cfa95fe6-8367-4478-957c-edf8561dab21.1'
ok  28 [      9/      2] <  65> 'stat /d/backends/patchy0/.shard/cfa95fe6-8367-4478-957c-edf8561dab21.2 /d/backends/patchy1/.shard/cfa95fe6-8367-4478-957c-edf8561dab21.2'
ok  29 [     52/      2] <  67> '1048602 echo 1048602 1048602'
ok  30 [     15/  11046] <  69> './tests/bugs/shard/shard-fallocate localhost.localdomain patchy 0 5242880 1048576 /file3 /opt/glusterfs/var/log/glusterfs/glfs-patchy.log'
ok  31 [     41/      2] <  70> 'db677843bb19004c18b71597026b2181 echo db677843bb19004c18b71597026b2181'
ok  32 [      9/      7] <  72> 'Y force_umount /mnt/glusterfs/0'
ok  33 [      9/   5152] <  73> 'gluster --mode=script --wignore volume stop patchy'
ok  34 [     17/    580] <  74> 'gluster --mode=script --wignore volume delete patchy'
ok
All tests successful.
Files=1, Tests=34, 43 wallclock secs ( 0.03 usr  0.00 sys +  1.14 cusr  0.67 csys =  1.84 CPU)
Result: PASS

2)

diff --git a/tests/bugs/shard/zero-flag.t b/tests/bugs/shard/zero-flag.t
index 1f39787ab..9332a7fc7 100644
--- a/tests/bugs/shard/zero-flag.t
+++ b/tests/bugs/shard/zero-flag.t
@@ -12,7 +12,7 @@ require_fallocate -z -l 512k $M0/file && rm -f $M0/file

  TEST glusterd
  TEST pidof glusterd
-TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{0,1,2,3}
+TEST $CLI volume create $V0 disperse 3 redundancy 1 $H0:$B0/${V0}{0,1,2}
  TEST $CLI volume set $V0 features.shard on
  TEST $CLI volume set $V0 features.shard-block-size 4MB
  TEST $CLI volume start $V0

3)

# prove -vf ./tests/bugs/shard/zero-flag.t
./tests/bugs/shard/zero-flag.t ..
1..34
ok   1 [    191/   1435] <  13> 'glusterd'
ok   2 [      9/      5] <  14> 'pidof glusterd'
ok   3 [      9/    159] <  15> 'gluster --mode=script --wignore volume create patchy disperse 3 redundancy 1 localhost.localdomain:/d/backends/patchy0 localhost.localdomain:/d/backends/patchy1
localhost.localdomain:/d/backends/patchy2'
ok   4 [      9/    138] <  16> 'gluster --mode=script --wignore volume set patchy features.shard on'
ok   5 [     10/    135] <  17> 'gluster --mode=script --wignore volume set patchy features.shard-block-size 4MB'
ok   6 [     12/   1397] <  18> 'gluster --mode=script --wignore volume start patchy'
ok   7 [     12/     43] <  20> '_GFS --attribute-timeout=0 --entry-timeout=0 --volfile-id=patchy --volfile-server=localhost.localdomain /mnt/glusterfs/0'
ok   8 [     10/     92] <  21> 'build_tester ./tests/bugs/shard/shard-fallocate.c -lgfapi -Wall -O2'
ok   9 [     10/      6] <  25> 'touch /mnt/glusterfs/0/tmp'
ok  10 [     13/      1] <  26> ''
ok  11 [     10/      6] <  27> 'touch /mnt/glusterfs/0/file1'
ok  12 [     19/  13044] <  31> './tests/bugs/shard/shard-fallocate localhost.localdomain patchy 0 0 6291456 /file1 /opt/glusterfs/var/log/glusterfs/glfs-patchy.log'
ok  13 [     16/      4] <  33> '6291456 stat -c %s /mnt/glusterfs/0/file1'
ok  14 [     10/      2] <  36> 'stat /d/backends/patchy0/.shard'
ok  15 [     11/      2] <  37> 'stat /d/backends/patchy1/.shard'
ok  16 [     11/      2] <  38> 'stat /d/backends/patchy2/.shard'
stat: cannot stat '/d/backends/patchy3/.shard': No such file or directory
not ok  17 [     11/      2] <  39> 'stat /d/backends/patchy3/.shard' -> ''
not ok  18 [     27/      3] <  41> '2097152 echo 1048576 1048576 1048576' -> 'Got "1048576 1048576 1048576" instead of "2097152"'
ok  19 [     11/     22] <  42> '1 file_all_zeroes /mnt/glusterfs/0/file1'
ok  20 [     11/      6] <  47> 'truncate -s 6M /mnt/glusterfs/0/file2'
dd: error writing '/mnt/glusterfs/0/file2': Transport endpoint is not connected
dd: closing input file '/mnt/glusterfs/0/tmp': Transport endpoint is not connected
not ok  21 [     11/    360] <  48> 'dd if=/mnt/glusterfs/0/tmp of=/mnt/glusterfs/0/file2 bs=1 seek=3145728 count=26 conv=notrunc' -> ''
md5sum: /mnt/glusterfs/0/file2: Transport endpoint is not connected
ok  22 [     17/  13054] <  51> './tests/bugs/shard/shard-fallocate localhost.localdomain patchy 0 3145728 26 /file2 /opt/glusterfs/var/log/glusterfs/glfs-patchy.log'
stat: cannot stat '/mnt/glusterfs/0/file2': Transport endpoint is not connected
not ok  23 [     16/      3] <  53> '6291456 stat -c %s /mnt/glusterfs/0/file2' -> 'Got "" instead of "6291456"'
md5sum: /mnt/glusterfs/0/file2: Transport endpoint is not connected
ok  24 [     13/      2] <  54> ' echo'
touch: cannot touch '/mnt/glusterfs/0/file3': Transport endpoint is not connected
not ok  25 [     10/      2] <  59> 'touch /mnt/glusterfs/0/file3' -> ''
dd: failed to open '/mnt/glusterfs/0/tmp': Transport endpoint is not connected
not ok  26 [     13/      1] <  63> 'dd if=/mnt/glusterfs/0/tmp of=/mnt/glusterfs/0/file3 bs=1 seek=9437184 count=26 conv=notrunc' -> ''
ok  27 [      8/      1] <  64> '! stat /d/backends/patchy*/.shard/.1'
stat: cannot stat '/d/backends/patchy*/.shard/.2': No such file or directory
not ok  28 [      9/      2] <  65> 'stat /d/backends/patchy*/.shard/.2' -> ''
md5sum: /mnt/glusterfs/0/file3: Transport endpoint is not connected
stat: missing operand
Try 'stat --help' for more information.
not ok  29 [     24/      2] <  67> '1048602 echo' -> 'Got "" instead of "1048602"'
glfs_open: returned NULL
ok  30 [     13/  13054] <  69> './tests/bugs/shard/shard-fallocate localhost.localdomain patchy 0 5242880 1048576 /file3 /opt/glusterfs/var/log/glusterfs/glfs-patchy.log'
md5sum: /mnt/glusterfs/0/file3: Transport endpoint is not connected
ok  31 [     21/      3] <  70> ' echo'
ok  32 [     11/      7] <  72> 'Y force_umount /mnt/glusterfs/0'
ok  33 [     11/   4160] <  73> 'gluster --mode=script --wignore volume stop patchy'
ok  34 [     17/    586] <  74> 'gluster --mode=script --wignore volume delete patchy'
Failed 8/34 subtests

Test Summary Report
-------------------
./tests/bugs/shard/zero-flag.t (Wstat: 0 Tests: 34 Failed: 8)
   Failed tests:  17-18, 21, 23, 25-26, 28-29
Files=1, Tests=34, 48 wallclock secs ( 0.02 usr  0.01 sys +  1.00 cusr  0.64 csys =  1.67 CPU)
Result: FAIL

Dmitry
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