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permission-find: Cache the root entry for legacy permissions

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This makes searching faster if there are many legacy permissions present.

The root entry (which contains all legacy permission ACIs) is only
looked up once.

Reviewed-By: Martin Kosek <mkosek@redhat.com>
This commit is contained in:
Petr Viktorin 2014-02-28 13:38:12 +01:00 committed by Martin Kosek
parent 8e98690409
commit 34c3d309d9
1 changed files with 23 additions and 8 deletions
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31
ipalib/plugins/permission.py
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@ -522,13 +522,14 @@ class permission(baseldap.LDAPObject):
return acientry, acistring
def _get_aci_entry_and_string(self, permission_entry, name=None,
notfound_ok=False):
notfound_ok=False, cached_acientry=None):
"""Get the entry and ACI corresponding to the permission entry
:param name: The name of the permission, or None for the cn
:param notfound_ok:
If true, (acientry, None) will be returned on missing ACI, rather
than raising exception
:param cached_acientry: See upgrade_permission()
"""
ldap = self.api.Backend.ldap2
if name is None:
@ -537,10 +538,15 @@ class permission(baseldap.LDAPObject):
self.api.env.basedn)
wanted_aciname = 'permission:%s' % name
try:
acientry = ldap.get_entry(location, ['aci'])
except errors.NotFound:
acientry = ldap.make_entry(location)
if (cached_acientry and
cached_acientry.dn == location and
'aci' in cached_acientry):
acientry = cached_acientry
else:
try:
acientry = ldap.get_entry(location, ['aci'])
except errors.NotFound:
acientry = ldap.make_entry(location)
acis = acientry.get('aci', ())
for acistring in acis:
aci = ACI(acistring)
@ -554,7 +560,7 @@ class permission(baseldap.LDAPObject):
'in %(dn)s ') % {'name': name, 'dn': location})
def upgrade_permission(self, entry, target_entry=None,
output_only=False):
output_only=False, cached_acientry=None):
"""Upgrade the given permission entry to V2, in-place
The entry is only upgraded if it is a plain old-style permission,
@ -567,11 +573,16 @@ class permission(baseldap.LDAPObject):
:param output_only:
If true, the flags are not updated to V2.
Used for the -find and -show commands.
:param cached_acientry:
Optional pre-retreived entry that contains the existing ACI.
If it is None or its DN does not match the location DN,
cached_acientry is ignored and the entry is retreived from LDAP.
"""
if entry.get('ipapermissiontype'):
# Only convert old-style, non-SYSTEM permissions -- i.e. no flags
return
base, acistring = self._get_aci_entry_and_string(entry)
base, acistring = self._get_aci_entry_and_string(
entry, cached_acientry=cached_acientry)
if not target_entry:
target_entry = entry
@ -1078,8 +1089,11 @@ class permission_find(baseldap.LDAPSearch):
base_dn=DN(self.obj.container_dn, self.api.env.basedn),
filter=ldap.combine_filters(filters, rules=ldap.MATCH_ALL),
attrs_list=attrs_list)
# Retrieve the root entry (with all legacy ACIs) at once
root_entry = ldap.get_entry(DN(api.env.basedn), ['aci'])
except errors.NotFound:
legacy_entries = ()
cached_root_entry = None
self.log.debug('potential legacy entries: %s', len(legacy_entries))
nonlegacy_names = {e.single_value['cn'] for e in entries}
for entry in legacy_entries:
@ -1094,7 +1108,8 @@ class permission_find(baseldap.LDAPSearch):
entries.pop()
truncated = True
break
self.obj.upgrade_permission(entry, output_only=True)
self.obj.upgrade_permission(entry, output_only=True,
cached_acientry=root_entry)
cn = entry.single_value['cn']
if any(a.lower() in cn.lower() for a in args if a):
entries.append(entry)