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130 lines
3.5 KiB
130 lines
3.5 KiB
package mount
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import (
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"context"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/hanwen/go-fuse/v2/fuse"
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"time"
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)
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/**
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* Create and open a file
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*
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* If the file does not exist, first create it with the specified
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* mode, and then open it.
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*
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* If this method is not implemented or under Linux kernel
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* versions earlier than 2.6.15, the mknod() and open() methods
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* will be called instead.
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*/
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func (wfs *WFS) Create(cancel <-chan struct{}, in *fuse.CreateIn, name string, out *fuse.CreateOut) (code fuse.Status) {
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// if implemented, need to use
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// inode := wfs.inodeToPath.Lookup(entryFullPath)
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// to ensure nlookup counter
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return fuse.ENOSYS
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}
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/** Create a file node
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*
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* This is called for creation of all non-directory, non-symlink
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* nodes. If the filesystem defines a create() method, then for
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* regular files that will be called instead.
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*/
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func (wfs *WFS) Mknod(cancel <-chan struct{}, in *fuse.MknodIn, name string, out *fuse.EntryOut) (code fuse.Status) {
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if s := checkName(name); s != fuse.OK {
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return s
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}
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newEntry := &filer_pb.Entry{
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Name: name,
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IsDirectory: false,
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Attributes: &filer_pb.FuseAttributes{
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Mtime: time.Now().Unix(),
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Crtime: time.Now().Unix(),
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FileMode: uint32(toFileMode(in.Mode) &^ wfs.option.Umask),
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Uid: in.Uid,
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Gid: in.Gid,
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Collection: wfs.option.Collection,
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Replication: wfs.option.Replication,
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TtlSec: wfs.option.TtlSec,
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},
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}
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dirFullPath := wfs.inodeToPath.GetPath(in.NodeId)
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entryFullPath := dirFullPath.Child(name)
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err := wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
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wfs.mapPbIdFromLocalToFiler(newEntry)
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defer wfs.mapPbIdFromFilerToLocal(newEntry)
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request := &filer_pb.CreateEntryRequest{
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Directory: string(dirFullPath),
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Entry: newEntry,
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Signatures: []int32{wfs.signature},
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}
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glog.V(1).Infof("mknod: %v", request)
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if err := filer_pb.CreateEntry(client, request); err != nil {
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glog.V(0).Infof("mknod %s: %v", entryFullPath, err)
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return err
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}
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if err := wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry)); err != nil {
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return fmt.Errorf("local mknod %s: %v", entryFullPath, err)
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}
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return nil
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})
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glog.V(0).Infof("mknod %s: %v", entryFullPath, err)
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if err != nil {
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return fuse.EIO
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}
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inode := wfs.inodeToPath.Lookup(entryFullPath, false)
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wfs.outputPbEntry(out, inode, newEntry)
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return fuse.OK
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}
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/** Remove a file */
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func (wfs *WFS) Unlink(cancel <-chan struct{}, header *fuse.InHeader, name string) (code fuse.Status) {
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dirFullPath := wfs.inodeToPath.GetPath(header.NodeId)
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entryFullPath := dirFullPath.Child(name)
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entry, status := wfs.maybeLoadEntry(entryFullPath)
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if status != fuse.OK {
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return status
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}
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// first, ensure the filer store can correctly delete
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glog.V(3).Infof("remove file: %v", entryFullPath)
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isDeleteData := entry != nil && entry.HardLinkCounter <= 1
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err := filer_pb.Remove(wfs, string(dirFullPath), name, isDeleteData, false, false, false, []int32{wfs.signature})
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if err != nil {
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glog.V(0).Infof("remove %s: %v", entryFullPath, err)
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return fuse.ENOENT
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}
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// then, delete meta cache
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if err = wfs.metaCache.DeleteEntry(context.Background(), entryFullPath); err != nil {
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glog.V(3).Infof("local DeleteEntry %s: %v", entryFullPath, err)
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return fuse.EIO
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}
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wfs.metaCache.DeleteEntry(context.Background(), entryFullPath)
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wfs.inodeToPath.RemovePath(entryFullPath)
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return fuse.OK
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}
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