mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-11 15:59:06 +08:00
71b33faef0
A POSIX filesystem does not implicitly create parent directories when they do not exist. Directories must be explicitly created and permissions be set. This also fixes a bug where asynchronous operations would create a file in the filer before the parent directory was created. If the file was a symlink or another special type of file the directory would inherit that type and become unusable in the mounted FS.
92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
package mount
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
"syscall"
|
|
"time"
|
|
|
|
"github.com/hanwen/go-fuse/v2/fuse"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/filer"
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
|
|
)
|
|
|
|
/** Create a symbolic link */
|
|
func (wfs *WFS) Symlink(cancel <-chan struct{}, header *fuse.InHeader, target string, name string, out *fuse.EntryOut) (code fuse.Status) {
|
|
|
|
if wfs.IsOverQuota {
|
|
return fuse.Status(syscall.ENOSPC)
|
|
}
|
|
if s := checkName(name); s != fuse.OK {
|
|
return s
|
|
}
|
|
|
|
dirPath, code := wfs.inodeToPath.GetPath(header.NodeId)
|
|
if code != fuse.OK {
|
|
return
|
|
}
|
|
entryFullPath := dirPath.Child(name)
|
|
|
|
request := &filer_pb.CreateEntryRequest{
|
|
Directory: string(dirPath),
|
|
Entry: &filer_pb.Entry{
|
|
Name: name,
|
|
IsDirectory: false,
|
|
Attributes: &filer_pb.FuseAttributes{
|
|
Mtime: time.Now().Unix(),
|
|
Crtime: time.Now().Unix(),
|
|
FileMode: uint32(os.FileMode(0777) | os.ModeSymlink),
|
|
Uid: header.Uid,
|
|
Gid: header.Gid,
|
|
SymlinkTarget: target,
|
|
},
|
|
},
|
|
Signatures: []int32{wfs.signature},
|
|
SkipCheckParentDirectory: true,
|
|
}
|
|
|
|
err := wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
wfs.mapPbIdFromLocalToFiler(request.Entry)
|
|
defer wfs.mapPbIdFromFilerToLocal(request.Entry)
|
|
|
|
if err := filer_pb.CreateEntry(client, request); err != nil {
|
|
return fmt.Errorf("symlink %s: %v", entryFullPath, err)
|
|
}
|
|
|
|
wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
|
|
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
glog.V(0).Infof("Symlink %s => %s: %v", entryFullPath, target, err)
|
|
return fuse.EIO
|
|
}
|
|
|
|
inode := wfs.inodeToPath.Lookup(entryFullPath, request.Entry.Attributes.Crtime, false, false, 0, true)
|
|
|
|
wfs.outputPbEntry(out, inode, request.Entry)
|
|
|
|
return fuse.OK
|
|
}
|
|
|
|
func (wfs *WFS) Readlink(cancel <-chan struct{}, header *fuse.InHeader) (out []byte, code fuse.Status) {
|
|
entryFullPath, code := wfs.inodeToPath.GetPath(header.NodeId)
|
|
if code != fuse.OK {
|
|
return
|
|
}
|
|
|
|
entry, status := wfs.maybeLoadEntry(entryFullPath)
|
|
if status != fuse.OK {
|
|
return nil, status
|
|
}
|
|
if os.FileMode(entry.Attributes.FileMode)&os.ModeSymlink == 0 {
|
|
return nil, fuse.EINVAL
|
|
}
|
|
|
|
return []byte(entry.Attributes.SymlinkTarget), fuse.OK
|
|
}
|