[libvirt-test-API][PATCH 1/2] Add freepage test

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For system default pagesize, it's hard to calculate,
and it changes all the time, so just skip it. For others,
reading from sysfs to get free pages.

Signed-off-by: Jincheng Miao <jmiao@xxxxxxxxxx>
---
 repos/virconn/free_pages.py |   97 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 97 insertions(+), 0 deletions(-)
 create mode 100644 repos/virconn/free_pages.py

diff --git a/repos/virconn/free_pages.py b/repos/virconn/free_pages.py
new file mode 100644
index 0000000..7172dfe
--- /dev/null
+++ b/repos/virconn/free_pages.py
@@ -0,0 +1,97 @@
+#!/usr/bin/env python
+# test libvirt free pages
+
+import os
+import resource
+
+import libvirt
+from libvirt import libvirtError
+
+from src import sharedmod
+
+required_params = ('cellid', 'pagesize',)
+optional_params = {}
+
+HUGEPAGE_PATH = '/sys/devices/system/node/node%s/hugepages/hugepages-%skB/free_hugepages'
+
+def parse_unit(pagesz):
+    """ parse a integer value, its unit is KiB
+    """
+    val = int(pagesz[0:len(pagesz)-1])
+    unit = pagesz[-1]
+    if unit == 'K':
+        unit = 1
+    elif unit == 'M':
+        unit = 1024
+    elif unit == 'G':
+        unit = 1024*1024
+    else:
+        return None
+
+    return val * unit
+
+def parse_page_list(pagesize):
+    """ parse page size
+    """
+    if pagesize == None:
+        return None
+
+    l = list()
+    for ps in pagesize.split(','):
+        ps.strip().upper()
+        val = parse_unit(ps)
+        if val == None:
+            return None
+        l.append(val)
+    return l
+
+def check_free_pages(page_list, cell_id, free_page, logger):
+    """ check page size
+    """
+    for ps in page_list:
+        # if pagesize is equal to system pagesize, since it is hard to
+        # calculate, so we just pass it
+        if resource.getpagesize()/1024 == ps:
+            logger.info("skip to check default %sKB-page" % ps)
+            continue
+
+        sysfs_path = HUGEPAGE_PATH % (cell_id, ps)
+        if not os.access(sysfs_path, os.R_OK):
+            logger.error("could not find %s" % sysfs_path)
+            return False
+        f= open(sysfs_path)
+        fp = int(f.read())
+        f.close()
+        if not fp == free_page[0][ps]:
+            logger.error("Free %sKB page checking failed" % ps)
+            return False
+        logger.info("Free %sKB page: %s" % (ps, fp))
+
+    return True
+
+def free_pages(params):
+    """ test libvirt free pages
+    """
+    logger = params['logger']
+    cell_id = int(params['cellid'])
+    
+    conn = sharedmod.libvirtobj['conn']
+    
+    page_list = parse_page_list(params['pagesize'])
+    if page_list == None:
+        logger.error("pagesize could not be recognized")
+        return 1
+    
+    try:
+        free_page = conn.getFreePages(page_list, cell_id, 1)
+
+        if check_free_pages(page_list, cell_id, free_page, logger):
+            logger.info("Success to check free page")
+        else:
+            logger.error("Failed to check free page")
+            return 1
+    except libvirtError, e:
+        logger.error("API error message: %s, error code is %s" %
+                     e.message)
+        return 1
+    return 0
\ No newline at end of file
-- 
1.7.1

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