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
|
package filesys
import (
"context"
"github.com/seaweedfs/fuse"
"github.com/chrislusf/seaweedfs/weed/filesys/meta_cache"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
func getxattr(entry *filer_pb.Entry, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
if entry == nil {
return fuse.ErrNoXattr
}
if entry.Extended == nil {
return fuse.ErrNoXattr
}
data, found := entry.Extended[req.Name]
if !found {
return fuse.ErrNoXattr
}
if req.Position < uint32(len(data)) {
size := req.Size
if req.Position+size >= uint32(len(data)) {
size = uint32(len(data)) - req.Position
}
if size == 0 {
resp.Xattr = data[req.Position:]
} else {
resp.Xattr = data[req.Position : req.Position+size]
}
}
return nil
}
func setxattr(entry *filer_pb.Entry, req *fuse.SetxattrRequest) error {
if entry == nil {
return fuse.EIO
}
if entry.Extended == nil {
entry.Extended = make(map[string][]byte)
}
data, _ := entry.Extended[req.Name]
newData := make([]byte, int(req.Position)+len(req.Xattr))
copy(newData, data)
copy(newData[int(req.Position):], req.Xattr)
entry.Extended[req.Name] = newData
return nil
}
func removexattr(entry *filer_pb.Entry, req *fuse.RemovexattrRequest) error {
if entry == nil {
return fuse.ErrNoXattr
}
if entry.Extended == nil {
return fuse.ErrNoXattr
}
_, found := entry.Extended[req.Name]
if !found {
return fuse.ErrNoXattr
}
delete(entry.Extended, req.Name)
return nil
}
func listxattr(entry *filer_pb.Entry, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
if entry == nil {
return fuse.EIO
}
for k := range entry.Extended {
resp.Append(k)
}
size := req.Size
if req.Position+size >= uint32(len(resp.Xattr)) {
size = uint32(len(resp.Xattr)) - req.Position
}
if size == 0 {
resp.Xattr = resp.Xattr[req.Position:]
} else {
resp.Xattr = resp.Xattr[req.Position : req.Position+size]
}
return nil
}
func (wfs *WFS) maybeLoadEntry(dir, name string) (entry *filer_pb.Entry, err error) {
fullpath := util.NewFullPath(dir, name)
// glog.V(3).Infof("read entry cache miss %s", fullpath)
// read from async meta cache
meta_cache.EnsureVisited(wfs.metaCache, wfs, util.FullPath(dir))
cachedEntry, cacheErr := wfs.metaCache.FindEntry(context.Background(), fullpath)
if cacheErr == filer_pb.ErrNotFound {
return nil, fuse.ENOENT
}
return cachedEntry.ToProtoEntry(), nil
}
|
