[Bugs] [Bug 1543996] truncates read-only files on copy

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1543996

Kaleb KEITHLEY <kkeithle at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|ganesha-nfs                 |posix-acl
           Assignee|kkeithle at redhat.com         |bugs at gluster.org



--- Comment #5 from Kaleb KEITHLEY <kkeithle at redhat.com> ---
I looked at this "briefly."

When copying a 0444 file over gluster native/fuse, the destination file is
created with open(...,O_CREAT)* and has acl perms that allow the open() to
succeed.

But when copying the same file over NFS (nfs-ganesha, fsal_gluster, gfapi) the
file is created with creat() (create fop) and has insufficient acl perms to
allow the creat() to succeed.

In the time that I spent looking at it I was unable to find where in gluster
those initial acl perms come from or why open(...,O_CREAT) has different
default perms than creat().

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