src/ceph/src/test/librbd/test_notify.py

   1 #!/usr/bin/python
   2 import os
   3 import sys
   4 import time
   5
   6 from rados import Rados
   7 from rbd import (RBD,
   8                  Image,
   9                  ImageNotFound,
  10                  RBD_FEATURE_EXCLUSIVE_LOCK,
  11                  RBD_FEATURE_LAYERING,
  12                  RBD_FEATURE_OBJECT_MAP,
  13                  RBD_FEATURE_FAST_DIFF,
  14                  RBD_FLAG_OBJECT_MAP_INVALID)
  15
  16 POOL_NAME='rbd'
  17 PARENT_IMG_NAME='test_notify_parent'
  18 CLONE_IMG_NAME='test_notify_clone'
  19 CLONE_IMG_RENAME='test_notify_clone2'
  20 IMG_SIZE = 16 << 20
  21 IMG_ORDER = 20
  22
  23 def delete_image(ioctx, img_name):
  24     image = Image(ioctx, img_name)
  25     for snap in image.list_snaps():
  26         snap_name = snap['name']
  27         print("removing snapshot: %s@%s" % (img_name, snap_name))
  28         if image.is_protected_snap(snap_name):
  29             image.unprotect_snap(snap_name)
  30         image.remove_snap(snap_name)
  31     image.close()
  32     print("removing image: %s" % img_name)
  33     RBD().remove(ioctx, img_name)
  34
  35 def safe_delete_image(ioctx, img_name):
  36     try:
  37         delete_image(ioctx, img_name)
  38     except ImageNotFound:
  39         pass
  40
  41 def get_features():
  42     features = os.getenv("RBD_FEATURES")
  43     if features is not None:
  44         features = int(features)
  45     else:
  46         features = int(RBD_FEATURE_EXCLUSIVE_LOCK | RBD_FEATURE_LAYERING |
  47                        RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF)
  48     assert((features & RBD_FEATURE_EXCLUSIVE_LOCK) != 0)
  49     assert((features & RBD_FEATURE_LAYERING) != 0)
  50     assert((features & RBD_FEATURE_OBJECT_MAP) != 0)
  51     assert((features & RBD_FEATURE_FAST_DIFF) != 0)
  52     return features
  53
  54 def master(ioctx):
  55     print("starting master")
  56     safe_delete_image(ioctx, CLONE_IMG_RENAME)
  57     safe_delete_image(ioctx, CLONE_IMG_NAME)
  58     safe_delete_image(ioctx, PARENT_IMG_NAME)
  59
  60     features = get_features()
  61     RBD().create(ioctx, PARENT_IMG_NAME, IMG_SIZE, IMG_ORDER, old_format=False,
  62                  features=features)
  63     with Image(ioctx, PARENT_IMG_NAME) as image:
  64         image.create_snap('snap1')
  65         image.protect_snap('snap1')
  66
  67     features = features & ~(RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF)
  68     RBD().clone(ioctx, PARENT_IMG_NAME, 'snap1', ioctx, CLONE_IMG_NAME,
  69                 features=features)
  70     with Image(ioctx, CLONE_IMG_NAME) as image:
  71         print("acquiring exclusive lock")
  72         offset = 0
  73         data = os.urandom(512)
  74         while offset < IMG_SIZE:
  75             image.write(data, offset)
  76             offset += (1 << IMG_ORDER)
  77         image.write(b'1', IMG_SIZE - 1)
  78         assert(image.is_exclusive_lock_owner())
  79
  80         print("waiting for slave to complete")
  81         while image.is_exclusive_lock_owner():
  82             time.sleep(5)
  83
  84     safe_delete_image(ioctx, CLONE_IMG_RENAME)
  85     safe_delete_image(ioctx, CLONE_IMG_NAME)
  86     delete_image(ioctx, PARENT_IMG_NAME)
  87     print("finished")
  88
  89 def slave(ioctx):
  90     print("starting slave")
  91
  92     while True:
  93         try:
  94             with Image(ioctx, CLONE_IMG_NAME) as image:
  95                 if (image.list_lockers() != [] and
  96                     image.read(IMG_SIZE - 1, 1) == b'1'):
  97                     break
  98         except Exception:
  99             pass
 100
 101     print("detected master")
 102
 103     print("rename")
 104     RBD().rename(ioctx, CLONE_IMG_NAME, CLONE_IMG_RENAME);
 105     assert(not image.is_exclusive_lock_owner())
 106
 107     with Image(ioctx, CLONE_IMG_RENAME) as image:
 108         print("flatten")
 109         image.flatten()
 110         assert(not image.is_exclusive_lock_owner())
 111
 112         print("resize")
 113         image.resize(IMG_SIZE // 2)
 114         assert(not image.is_exclusive_lock_owner())
 115         assert(image.stat()['size'] == IMG_SIZE // 2)
 116
 117         print("create_snap")
 118         image.create_snap('snap1')
 119         assert(not image.is_exclusive_lock_owner())
 120         assert(any(snap['name'] == 'snap1'
 121                    for snap in image.list_snaps()))
 122
 123         print("protect_snap")
 124         image.protect_snap('snap1')
 125         assert(not image.is_exclusive_lock_owner())
 126         assert(image.is_protected_snap('snap1'))
 127
 128         print("unprotect_snap")
 129         image.unprotect_snap('snap1')
 130         assert(not image.is_exclusive_lock_owner())
 131         assert(not image.is_protected_snap('snap1'))
 132
 133         print("rename_snap")
 134         image.rename_snap('snap1', 'snap1-new')
 135         assert(not image.is_exclusive_lock_owner())
 136         assert(any(snap['name'] == 'snap1-new'
 137                    for snap in image.list_snaps()))
 138
 139         print("remove_snap")
 140         image.remove_snap('snap1-new')
 141         assert(not image.is_exclusive_lock_owner())
 142         assert(list(image.list_snaps()) == [])
 143
 144         print("rebuild object map")
 145         assert((image.features() & RBD_FEATURE_OBJECT_MAP) == 0)
 146         image.update_features(RBD_FEATURE_OBJECT_MAP, True)
 147         assert((image.flags() & RBD_FLAG_OBJECT_MAP_INVALID) != 0)
 148         image.rebuild_object_map()
 149         assert(not image.is_exclusive_lock_owner())
 150         assert((image.flags() & RBD_FLAG_OBJECT_MAP_INVALID) == 0)
 151
 152         print("write")
 153         data = os.urandom(512)
 154         image.write(data, 0)
 155         assert(image.is_exclusive_lock_owner())
 156
 157     print("finished")
 158
 159 def main():
 160     if len(sys.argv) != 2 or sys.argv[1] not in ['master', 'slave']:
 161         print("usage: %s: [master/slave]" % sys.argv[0])
 162         sys.exit(2)
 163
 164     rados = Rados(conffile='')
 165     rados.connect()
 166     ioctx = rados.open_ioctx(POOL_NAME)
 167     if sys.argv[1] == 'master':
 168         master(ioctx)
 169     else:
 170         slave(ioctx)
 171     rados.shutdown()
 172
 173 if __name__ == "__main__":
 174     main()