[Bugs] [Bug 1534453] Reading over than the file size on dispersed volume

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1534453

Ashish Pandey <aspandey at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
              Flags|needinfo?(aspandey at redhat.c |
                   |om)                         |



--- Comment #6 from Ashish Pandey <aspandey at redhat.com> ---
I could reproduce this case easily on latest master.
I am uploading two files with this BZ which will help to reproduce this case.

1 - ec-fallocate-read.t - It will create two volume of 6+3 (patchy) and 4+2
(patchy1). Will mount these volumes and create a file on each using fallocate. 
2 - ec-fallocate-read.c - This will read the files uding gfapi's and we can see
the issue. 

After compiling it we need to provide host name of the volume and volume name.

gcc  ec-fallocate-read.c  -lgfapi -Wall -O2

./a.out <hostname> patchy
./a.out <hostname> patchy1


I am seeing the following result - 

[root at apandey Bugz]# ./a.out apandey patchy1 
retr : 130394, offset : 0(0) 
offset : 130394


----
[root at apandey Bugz]# stat /mnt/glusterfs/1/test1
  File: /mnt/glusterfs/1/test1
  Size: 130394          Blocks: 256        IO Block: 131072 regular file
Device: 3ah/58d Inode: 11138790474948514051  Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2019-07-17 14:01:52.152482945 +0530
Modify: 2019-07-17 14:01:52.152482945 +0530
Change: 2019-07-17 13:59:33.253903983 +0530
 Birth: -



[root at apandey Bugz]# ./a.out apandey patchy
retr : 130394, offset : 0(0) 
retr : 1024, offset : 130394(0) 
retr : 678, offset : 131418(0) 
offset : 132096
[root at apandey Bugz]# 
------
[root at apandey Bugz]# stat /mnt/glusterfs/0/test1
  File: /mnt/glusterfs/0/test1
  Size: 130394          Blocks: 258        IO Block: 131072 regular file
Device: 39h/57d Inode: 9549418052567184184  Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2019-07-17 14:01:52.114542579 +0530
Modify: 2019-07-17 14:01:52.114542579 +0530
Change: 2019-07-17 14:01:52.113054347 +0530
 Birth: -

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