From b20173208f35279411d742d106f8ccd97f8ef82b Mon Sep 17 00:00:00 2001
From: Filippos Giannakos <philipgian@grnet.gr>
Date: Wed, 28 Jun 2017 16:33:41 +0300
Subject: [PATCH] Add preliminary support for userspace cache
---
ext_scripts/ext_rbd.py | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/ext_scripts/ext_rbd.py b/ext_scripts/ext_rbd.py
index 006e5c0..cd41e62 100755
--- a/ext_scripts/ext_rbd.py
+++ b/ext_scripts/ext_rbd.py
@@ -281,7 +281,7 @@ def snapshot(env):
return 1
-def format_qemu_uri(name, pool=None, cephx=None, conf_file=None):
+def format_qemu_uri(name, pool=None, cephx=None, conf_file=None, cache=None):
"""Create a QEMU RBD URI for the specific image / environment"""
uri = 'kvm:rbd:%s' % RBD.format_name(name, pool=pool)
@@ -290,6 +290,9 @@ def format_qemu_uri(name, pool=None, cephx=None, conf_file=None):
extra_conf += ':id=%s' % cephx['id']
if conf_file:
extra_conf += ':conf=%s' % conf_file
+ # TODO: we need to revisit this, to support more caching modes correctly.
+ if cache in ['writeback']:
+ extra_conf += ':rbd_cache=true'
if extra_conf:
uri += extra_conf
@@ -311,6 +314,7 @@ def attach(env):
name = env.get("name")
pool = env.get("rbd_pool")
cephx = env.get("cephx")
+ cache = env.get("cache")
if userspace_only:
device = ""
else:
@@ -325,7 +329,7 @@ def attach(env):
% (RBD.format_name(name, pool=pool), device))
sys.stdout.write("%s" % device)
- qemu_uri = format_qemu_uri(name, pool=pool, cephx=cephx)
+ qemu_uri = format_qemu_uri(name, pool=pool, cephx=cephx, cache=cache)
sys.stdout.write("\n%s" % qemu_uri)
return 0
--
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