/
migration.go
229 lines (184 loc) · 5.43 KB
/
migration.go
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
package mg10
import (
"context"
"errors"
"fmt"
"log"
"os"
"path"
"github.com/ipfs/go-blockservice"
"github.com/ipfs/go-datastore"
"github.com/ipfs/go-filestore"
"github.com/ipfs/go-ipfs-blockstore"
"github.com/ipfs/go-ipfs-exchange-offline"
"github.com/ipfs/go-ipfs-pinner/pinconv"
"github.com/ipfs/go-ipfs/plugin/loader"
"github.com/ipfs/go-ipfs/repo"
"github.com/ipfs/go-ipfs/repo/fsrepo"
"github.com/ipfs/go-ipfs/repo/fsrepo/migrations"
"github.com/ipfs/go-ipld-format"
"github.com/ipfs/go-merkledag"
migrate "github.com/ipfs/fs-repo-migrations/tools/go-migrate"
)
type Migration struct{}
var verbose bool
func init() {
log.SetOutput(os.Stdout)
log.SetFlags(0)
}
func (m Migration) Versions() string {
return "10-to-11"
}
func (m Migration) Reversible() bool {
return true
}
func (m Migration) Apply(opts migrate.Options) error {
const (
fromVer = 10
toVer = 11
)
verbose = opts.Verbose
log.Printf("applying %s repo migration", m.Versions())
ver, err := migrations.RepoVersion(opts.Path)
if err != nil {
return err
}
if ver != fromVer {
return fmt.Errorf("versions differ (expected: %d, actual: %d)", fromVer, ver)
}
if err = setupPlugins(opts.Path); err != nil {
return fmt.Errorf("failed to setup plugins: %v", err)
}
// Set to previous version to avoid "needs migration" error. This is safe
// for this migration since repo has not changed.
fsrepo.RepoVersion = 10
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if !fsrepo.IsInitialized(opts.Path) {
return fmt.Errorf("ipfs repo %q not initialized", opts.Path)
}
if verbose {
log.Printf("opening datastore at %q", opts.Path)
}
r, err := fsrepo.Open(opts.Path)
if err != nil {
return fmt.Errorf("cannot open datastore: %v", err)
}
defer r.Close()
if err = transferPins(ctx, r); err != nil {
return fmt.Errorf("failed to transfer pins: %v", err)
}
err = migrations.WriteRepoVersion(opts.Path, toVer)
if err != nil {
return fmt.Errorf("failed to update version file to %s: %v", toVer, err)
}
log.Print("updated version file")
log.Printf("Migration %d to %d succeeded", fromVer, toVer)
return nil
}
func (m Migration) Revert(opts migrate.Options) error {
verbose = opts.Verbose
log.Print("reverting migration")
err := setupPlugins(opts.Path)
if err != nil {
return fmt.Errorf("failed to setup plugins: %v", err)
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if !fsrepo.IsInitialized(opts.Path) {
return fmt.Errorf("ipfs repo %q not initialized", opts.Path)
}
if verbose {
log.Printf("opening datastore at %q", opts.Path)
}
r, err := fsrepo.Open(opts.Path)
if err != nil {
return fmt.Errorf("cannot open datastore: %v", err)
}
defer r.Close()
if err = revertPins(ctx, r); err != nil {
return err
}
err = migrations.WriteRepoVersion(opts.Path, 10)
if err != nil {
return fmt.Errorf("failed to update version file to 10: %v", err)
}
log.Print("updated version file")
return nil
}
type syncDagService struct {
format.DAGService
syncFn func() error
}
func (s *syncDagService) Sync() error {
return s.syncFn()
}
type batchWrap struct {
datastore.Datastore
}
func (d *batchWrap) Batch() (datastore.Batch, error) {
return datastore.NewBasicBatch(d), nil
}
func setupPlugins(externalPluginsPath string) error {
// Load any external plugins if available on externalPluginsPath
plugins, err := loader.NewPluginLoader(path.Join(externalPluginsPath, "plugins"))
if err != nil {
return fmt.Errorf("error loading plugins: %s", err)
}
// Load preloaded and external plugins
if err := plugins.Initialize(); err != nil {
return fmt.Errorf("error initializing plugins: %s", err)
}
if err := plugins.Inject(); err != nil {
return fmt.Errorf("error initializing plugins: %s", err)
}
return nil
}
func makeStore(r repo.Repo) (datastore.Datastore, format.DAGService, format.DAGService, error) {
dstr := r.Datastore()
dstore := &batchWrap{dstr}
bstore := blockstore.NewBlockstore(dstr)
bserv := blockservice.New(bstore, offline.Exchange(bstore))
dserv := merkledag.NewDAGService(bserv)
internalDag := merkledag.NewDAGService(bserv)
syncFn := func() error {
err := dstore.Sync(blockstore.BlockPrefix)
if err != nil {
return fmt.Errorf("cannot sync blockstore: %v", err)
}
err = dstore.Sync(filestore.FilestorePrefix)
if err != nil {
return fmt.Errorf("cannot sync filestore: %v", err)
}
return nil
}
syncDs := &syncDagService{dserv, syncFn}
syncInternalDag := &syncDagService{internalDag, syncFn}
return dstore, syncDs, syncInternalDag, nil
}
func transferPins(ctx context.Context, r repo.Repo) error {
log.Print("upgrading pinning to use datastore")
dstore, dserv, internalDag, err := makeStore(r)
if err != nil {
return err
}
_, toDSCount, err := pinconv.ConvertPinsFromIPLDToDS(ctx, dstore, dserv, internalDag)
if err != nil {
return errors.New("failed to convert ipld pin data into datastore")
}
log.Printf("converted %d pins from ipld storage into datastore", toDSCount)
return nil
}
func revertPins(ctx context.Context, r repo.Repo) error {
log.Print("reverting pinning to use ipld storage")
dstore, dserv, internalDag, err := makeStore(r)
if err != nil {
return err
}
_, toIPLDCount, err := pinconv.ConvertPinsFromDSToIPLD(ctx, dstore, dserv, internalDag)
if err != nil {
return errors.New("failed to convert pin data from datastore to ipld pinner")
}
log.Printf("converted %d pins from datastore to ipld storage", toIPLDCount)
return nil
}