1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Colin Walters <walters@verbum.org>
*/
#include "config.h"
#include "ostree-repo-private.h"
#include "otutil.h"
typedef struct {
OstreeRepo *repo;
GHashTable *reachable;
guint n_reachable_meta;
guint n_reachable_content;
guint n_unreachable_meta;
guint n_unreachable_content;
guint64 freed_bytes;
} OtPruneData;
static gboolean
maybe_prune_loose_object (OtPruneData *data,
OstreeRepoPruneFlags flags,
const char *checksum,
OstreeObjectType objtype,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
gs_unref_variant GVariant *key = NULL;
gs_unref_object GFile *objf = NULL;
key = ostree_object_name_serialize (checksum, objtype);
objf = _ostree_repo_get_object_path (data->repo, checksum, objtype);
if (!g_hash_table_lookup_extended (data->reachable, key, NULL, NULL))
{
if (!(flags & OSTREE_REPO_PRUNE_FLAGS_NO_PRUNE))
{
gs_unref_object GFileInfo *info = NULL;
if (!ot_gfile_query_info_allow_noent (objf, OSTREE_GIO_FAST_QUERYINFO,
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
&info, cancellable, error))
goto out;
if (info)
{
if (objtype == OSTREE_OBJECT_TYPE_COMMIT)
{
gs_unref_object GFile *detached_metadata =
_ostree_repo_get_commit_metadata_loose_path (data->repo, checksum);
if (!ot_gfile_ensure_unlinked (detached_metadata, cancellable, error))
goto out;
}
if (!gs_file_unlink (objf, cancellable, error))
goto out;
data->freed_bytes += g_file_info_get_size (info);
}
}
if (OSTREE_OBJECT_TYPE_IS_META (objtype))
data->n_unreachable_meta++;
else
data->n_unreachable_content++;
}
else
{
if (OSTREE_OBJECT_TYPE_IS_META (objtype))
data->n_reachable_meta++;
else
data->n_reachable_content++;
}
ret = TRUE;
out:
return ret;
}
/**
* ostree_repo_prune:
* @self: Repo
* @flags: Options controlling prune process
* @depth: Stop traversal after this many iterations (-1 for unlimited)
* @out_objects_total: (out): Number of objects found
* @out_objects_pruned: (out): Number of objects deleted
* @out_pruned_object_size_total: (out): Storage size in bytes of objects deleted
* @cancellable: Cancellable
* @error: Error
*
* Delete content from the repository. By default, this function will
* only delete "orphaned" objects not referred to by any commit. This
* can happen during a local commit operation, when we have written
* content objects but not saved the commit referencing them.
*
* However, if %OSTREE_REPO_PRUNE_FLAGS_REFS_ONLY is provided, instead
* of traversing all commits, only refs will be used. Particularly
* when combined with @depth, this is a convenient way to delete
* history from the repository.
*
* Use the %OSTREE_REPO_PRUNE_FLAGS_NO_PRUNE to just determine
* statistics on objects that would be deleted, without actually
* deleting them.
*/
gboolean
ostree_repo_prune (OstreeRepo *self,
OstreeRepoPruneFlags flags,
gint depth,
gint *out_objects_total,
gint *out_objects_pruned,
guint64 *out_pruned_object_size_total,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
GHashTableIter hash_iter;
gpointer key, value;
gs_unref_hashtable GHashTable *objects = NULL;
gs_unref_hashtable GHashTable *all_refs = NULL;
OtPruneData data = { 0, };
gboolean refs_only = flags & OSTREE_REPO_PRUNE_FLAGS_REFS_ONLY;
data.repo = self;
data.reachable = ostree_repo_traverse_new_reachable ();
if (refs_only)
{
if (!ostree_repo_list_refs (self, NULL, &all_refs,
cancellable, error))
goto out;
g_hash_table_iter_init (&hash_iter, all_refs);
while (g_hash_table_iter_next (&hash_iter, &key, &value))
{
const char *checksum = value;
if (!ostree_repo_traverse_commit_union (self, checksum, depth, data.reachable,
cancellable, error))
goto out;
}
}
if (!ostree_repo_list_objects (self, OSTREE_REPO_LIST_OBJECTS_ALL, &objects,
cancellable, error))
goto out;
if (!refs_only)
{
g_hash_table_iter_init (&hash_iter, objects);
while (g_hash_table_iter_next (&hash_iter, &key, &value))
{
GVariant *serialized_key = key;
const char *checksum;
OstreeObjectType objtype;
ostree_object_name_deserialize (serialized_key, &checksum, &objtype);
if (objtype != OSTREE_OBJECT_TYPE_COMMIT)
continue;
if (!ostree_repo_traverse_commit_union (self, checksum, depth, data.reachable,
cancellable, error))
goto out;
}
}
g_hash_table_iter_init (&hash_iter, objects);
while (g_hash_table_iter_next (&hash_iter, &key, &value))
{
GVariant *serialized_key = key;
GVariant *objdata = value;
const char *checksum;
OstreeObjectType objtype;
gboolean is_loose;
ostree_object_name_deserialize (serialized_key, &checksum, &objtype);
g_variant_get_child (objdata, 0, "b", &is_loose);
if (!is_loose)
continue;
if (!maybe_prune_loose_object (&data, flags, checksum, objtype,
cancellable, error))
goto out;
}
ret = TRUE;
*out_objects_total = (data.n_reachable_meta + data.n_unreachable_meta +
data.n_reachable_content + data.n_unreachable_content);
*out_objects_pruned = (data.n_unreachable_meta + data.n_unreachable_content);
*out_pruned_object_size_total = data.freed_bytes;
out:
if (data.reachable)
g_hash_table_unref (data.reachable);
return ret;
}
|
