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
|
package filesys
import (
"context"
"github.com/chrislusf/seaweedfs/weed/util"
"os"
"syscall"
"time"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/util/log"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/fuse"
"github.com/seaweedfs/fuse/fs"
)
var _ = fs.NodeLinker(&Dir{})
var _ = fs.NodeSymlinker(&Dir{})
var _ = fs.NodeReadlinker(&File{})
const (
HARD_LINK_MARKER = '\x01'
)
func (dir *Dir) Link(ctx context.Context, req *fuse.LinkRequest, old fs.Node) (fs.Node, error) {
oldFile, ok := old.(*File)
if !ok {
log.Errorf("old node is not a file: %+v", old)
}
log.Tracef("Link: %v/%v -> %v/%v", oldFile.dir.FullPath(), oldFile.Name, dir.FullPath(), req.NewName)
if _, err := oldFile.maybeLoadEntry(ctx); err != nil {
return nil, err
}
// update old file to hardlink mode
if len(oldFile.entry.HardLinkId) == 0 {
oldFile.entry.HardLinkId = append(util.RandomBytes(16), HARD_LINK_MARKER)
oldFile.entry.HardLinkCounter = 1
}
oldFile.entry.HardLinkCounter++
updateOldEntryRequest := &filer_pb.UpdateEntryRequest{
Directory: oldFile.dir.FullPath(),
Entry: oldFile.entry,
Signatures: []int32{dir.wfs.signature},
}
// CreateLink 1.2 : update new file to hardlink mode
request := &filer_pb.CreateEntryRequest{
Directory: dir.FullPath(),
Entry: &filer_pb.Entry{
Name: req.NewName,
IsDirectory: false,
Attributes: oldFile.entry.Attributes,
Chunks: oldFile.entry.Chunks,
Extended: oldFile.entry.Extended,
HardLinkId: oldFile.entry.HardLinkId,
HardLinkCounter: oldFile.entry.HardLinkCounter,
},
Signatures: []int32{dir.wfs.signature},
}
// apply changes to the filer, and also apply to local metaCache
err := dir.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(request.Entry)
defer dir.wfs.mapPbIdFromFilerToLocal(request.Entry)
if err := filer_pb.UpdateEntry(client, updateOldEntryRequest); err != nil {
log.Infof("Link %v/%v -> %s/%s: %v", oldFile.dir.FullPath(), oldFile.Name, dir.FullPath(), req.NewName, err)
return fuse.EIO
}
dir.wfs.metaCache.UpdateEntry(context.Background(), filer.FromPbEntry(updateOldEntryRequest.Directory, updateOldEntryRequest.Entry))
if err := filer_pb.CreateEntry(client, request); err != nil {
log.Infof("Link %v/%v -> %s/%s: %v", oldFile.dir.FullPath(), oldFile.Name, dir.FullPath(), req.NewName, err)
return fuse.EIO
}
dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
return nil
})
// create new file node
newNode := dir.newFile(req.NewName, request.Entry)
newFile := newNode.(*File)
if _, err := newFile.maybeLoadEntry(ctx); err != nil {
return nil, err
}
return newFile, err
}
func (dir *Dir) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node, error) {
log.Tracef("Symlink: %v/%v to %v", dir.FullPath(), req.NewName, req.Target)
request := &filer_pb.CreateEntryRequest{
Directory: dir.FullPath(),
Entry: &filer_pb.Entry{
Name: req.NewName,
IsDirectory: false,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32((os.FileMode(0777) | os.ModeSymlink) &^ dir.wfs.option.Umask),
Uid: req.Uid,
Gid: req.Gid,
SymlinkTarget: req.Target,
},
},
Signatures: []int32{dir.wfs.signature},
}
err := dir.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(request.Entry)
defer dir.wfs.mapPbIdFromFilerToLocal(request.Entry)
if err := filer_pb.CreateEntry(client, request); err != nil {
log.Infof("symlink %s/%s: %v", dir.FullPath(), req.NewName, err)
return fuse.EIO
}
dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
return nil
})
symlink := dir.newFile(req.NewName, request.Entry)
return symlink, err
}
func (file *File) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
entry, err := file.maybeLoadEntry(ctx)
if err != nil {
return "", err
}
if os.FileMode(entry.Attributes.FileMode)&os.ModeSymlink == 0 {
return "", fuse.Errno(syscall.EINVAL)
}
log.Tracef("Readlink: %v/%v => %v", file.dir.FullPath(), file.Name, entry.Attributes.SymlinkTarget)
return entry.Attributes.SymlinkTarget, nil
}
|
