Improve logging and raising DiskFileNoSpace

This commit only improves logging whenever ENOSPC (No space on disk)
or EDQUOT (Quota limit exceeded) is returned by glusterfs

Also, added methods to:
- get filename from file descriptor
- log with rate limit

Caveat: Although raising DiskFileNoSpace results in object-server
returning HTTPInsufficientStorage[507] correctly, the swift proxy-server
invokes "best_response" method that returns [503] to the user.

When write-behind translator is turned on in glusterfs, it may set
errno to EIO instead of ENOSPC/EDQUOT. This is documented in BZ 986812

BUG: 985862, 985253, 1020724
Change-Id: Ib0c5e41c11a8cdccc2077f71c31d8a23229452bb
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: http://review.gluster.org/6199
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/6269

1 files changed, 3 insertions, 2 deletions

diff --git a/gluster/swift/obj/diskfile.py b/gluster/swift/obj/diskfile.py
index b09179d..6e6856d 100644
--- a/gluster/swift/obj/diskfile.py
+++ b/gluster/swift/obj/diskfile.py
@@ -904,8 +904,9 @@ class DiskFile(object):
                 fd = do_open(tmppath,
                              os.O_WRONLY | os.O_CREAT | os.O_EXCL | O_CLOEXEC)
             except GlusterFileSystemOSError as gerr:
-                if gerr.errno == errno.ENOSPC:
-                    # Raise DiskFileNoSpace to be handled by upper layers
+                if gerr.errno in (errno.ENOSPC, errno.EDQUOT):
+                    # Raise DiskFileNoSpace to be handled by upper layers when
+                    # there is no space on disk OR when quota is exceeded
                     raise DiskFileNoSpace()
                 if gerr.errno not in (errno.ENOENT, errno.EEXIST, errno.EIO):
                     # FIXME: Other cases we should handle?