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Implement Handle

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This commit is contained in:
Ben Johnson
2020-10-15 15:29:27 -06:00
parent 4160638a92
commit 40d368dec5
2 changed files with 184 additions and 60 deletions
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106
node.go
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@@ -49,8 +49,8 @@ func (n *Node) srcpath() string {
return filepath.Join(n.fs.SourcePath, n.path)
}
func (n *Node) Attr(ctx context.Context, a *fuse.Attr) error {
log.Printf("[attr] node=%q", n.path)
func (n *Node) Attr(ctx context.Context, a *fuse.Attr) (err error) {
defer func() { log.Printf("[attr] node=%q -- attr=%s err=%v", n.path, a.String(), err) }()
fi, err := os.Stat(n.srcpath())
if err != nil {
@@ -86,8 +86,8 @@ func (n *Node) Attr(ctx context.Context, a *fuse.Attr) error {
// the directory, Lookup should return ENOENT.
//
// Lookup need not to handle the names "." and "..".
func (n *Node) Lookup(ctx context.Context, name string) (fs.Node, error) {
log.Printf("[lookup] node=%q name=%q", n.path, name)
func (n *Node) Lookup(ctx context.Context, name string) (_ fs.Node, err error) {
defer func() { log.Printf("[lookup] node=%q name=%q -- err=%v", n.path, name, err) }()
path := filepath.Join(n.path, name)
srcpath := filepath.Join(n.fs.SourcePath, path)
@@ -97,15 +97,15 @@ func (n *Node) Lookup(ctx context.Context, name string) (fs.Node, error) {
return NewNode(n.fs, path), nil
}
func (n *Node) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
log.Printf("[readdirall] node=%q", n.path)
func (n *Node) ReadDirAll(ctx context.Context) (ents []fuse.Dirent, err error) {
defer func() { log.Printf("[readdirall] node=%q -- ents=%d err=%v", n.path, len(ents), err) }()
fis, err := ioutil.ReadDir(n.srcpath())
if err != nil {
return nil, err
}
ents := make([]fuse.Dirent, len(fis))
ents = make([]fuse.Dirent, len(fis))
for i, fi := range fis {
statt := fi.Sys().(*syscall.Stat_t)
ents[i] = fuse.Dirent{Inode: statt.Ino, Name: fi.Name()}
@@ -130,8 +130,8 @@ func (n *Node) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
// req.Valid is a bitmask of what fields are actually being set.
// For example, the method should not change the mode of the file
// unless req.Valid.Mode() is true.
func (n *Node) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
log.Printf("[setattr] node=%q req=%s", n.path, req.String())
func (n *Node) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) (err error) {
defer func() { log.Printf("[setattr] node=%q req=%s -- err=%v", n.path, req.String(), err) }()
// Obtain current file stat.
srcpath := n.srcpath()
@@ -200,10 +200,10 @@ func (n *Node) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse
// TODO: Not sure what these are for.
if req.Valid.Handle() {
panic("TODO?")
println("TODO: setattr.handle")
}
if req.Valid.LockOwner() {
panic("TODO?")
println("TODO: setattr.lockowner")
}
// Update response attributes.
@@ -211,8 +211,10 @@ func (n *Node) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse
}
// Symlink creates a new symbolic link in the receiver, which must be a directory.
func (n *Node) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node, error) {
log.Printf("[symlink] node=%q newname=%q target=%q", n.path, req.NewName, req.Target)
func (n *Node) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (_ fs.Node, err error) {
defer func() {
log.Printf("[symlink] node=%q newname=%q target=%q -- err=%v", n.path, req.NewName, req.Target, err)
}()
if err := os.Symlink(req.Target, req.NewName); err != nil {
return nil, err
}
@@ -220,17 +222,19 @@ func (n *Node) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node,
}
// Readlink reads a symbolic link.
func (n *Node) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
log.Printf("[readlink] node=%q", n.path)
func (n *Node) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (_ string, err error) {
defer func() { log.Printf("[readlink] node=%q -- err=%v", n.path, err) }()
return os.Readlink(n.srcpath())
}
// Link creates a new directory entry in the receiver based on an
// existing Node. Receiver must be a directory.
func (n *Node) Link(ctx context.Context, req *fuse.LinkRequest, _old fs.Node) (fs.Node, error) {
func (n *Node) Link(ctx context.Context, req *fuse.LinkRequest, _old fs.Node) (_ fs.Node, err error) {
old := _old.(*Node)
log.Printf("[link] node=%q oldnode=%q name=%q", n.path, old.srcpath(), req.NewName)
defer func() {
log.Printf("[link] node=%q oldnode=%q name=%q -- err=%v", n.path, old.srcpath(), req.NewName, err)
}()
// assert(n.IsDir())
if err := os.Link(old.srcpath(), req.NewName); err != nil {
@@ -242,8 +246,8 @@ func (n *Node) Link(ctx context.Context, req *fuse.LinkRequest, _old fs.Node) (f
// Remove removes the entry with the given name from
// the receiver, which must be a directory. The entry to be removed
// may correspond to a file (unlink) or to a directory (rmdir).
func (n *Node) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
log.Printf("[remove] node=%q name=%q dir=%v", n.path, req.Name, req.Dir)
func (n *Node) Remove(ctx context.Context, req *fuse.RemoveRequest) (err error) {
defer func() { log.Printf("[remove] node=%q name=%q dir=%v -- err=%v", n.path, req.Name, req.Dir, err) }()
if req.Dir {
return syscall.Rmdir(filepath.Join(n.srcpath(), req.Name))
@@ -259,8 +263,8 @@ func (n *Node) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
// call but not the open(2) system call. If Access is not
// implemented, the Node behaves as if it always returns nil
// (permission granted), relying on checks in Open instead.
func (n *Node) Access(ctx context.Context, req *fuse.AccessRequest) error {
log.Printf("[access] node=%q mask=%#o", n.path, req.Mask)
func (n *Node) Access(ctx context.Context, req *fuse.AccessRequest) (err error) {
defer func() { log.Printf("[access] node=%q mask=%#o -- err=%v", n.path, req.Mask, err) }()
return syscall.Access(n.srcpath(), req.Mask)
}
@@ -271,9 +275,9 @@ func (n *Node) Access(ctx context.Context, req *fuse.AccessRequest) error {
// Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (Node, error)
//}
func (n *Node) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, error) {
log.Printf("[mkdir] node=%q mode=%#o umask=%#o", n.path, req.Mode, req.Umask)
if err := syscall.Mkdir(filepath.Join(n.srcpath(), req.Name), uint32(req.Mode&req.Umask)); err != nil {
func (n *Node) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (_ fs.Node, err error) {
defer func() { log.Printf("[mkdir] node=%q mode=%#o umask=%#o -- err=%v", n.path, req.Mode, req.Umask, err) }()
if err := syscall.Mkdir(filepath.Join(n.srcpath(), req.Name), uint32(req.Mode^req.Umask)); err != nil {
return nil, err
}
return NewNode(n.fs, filepath.Join(n.path, req.Name)), nil
@@ -289,8 +293,8 @@ func (n *Node) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, erro
// succeed, and the Node itself will be used as the Handle.
//
// XXX note about access. XXX OpenFlags.
func (n *Node) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
log.Printf("[open] node=%q dir=%v flags=%#o", n.path, req.Dir, req.Flags)
func (n *Node) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (_ fs.Handle, err error) {
defer func() { log.Printf("[open] node=%q dir=%v flags=%#o -- err=%v", n.path, req.Dir, req.Flags, err) }()
// TODO(bbj): Where does mode come from?
f, err := os.OpenFile(n.srcpath(), int(req.Flags), 0777)
@@ -301,10 +305,12 @@ func (n *Node) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenR
}
// Create creates a new directory entry in the receiver, which must be a directory.
func (n *Node) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
log.Printf("[create] node=%q name=%q flags=%#o mode=%#o umask=%#o", n.path, req.Name, req.Flags, req.Mode, req.Umask)
func (n *Node) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (_ fs.Node, _ fs.Handle, err error) {
defer func() {
log.Printf("[create] node=%q name=%q flags=%#o mode=%#o umask=%#o -- err=%v", n.path, req.Name, req.Flags, req.Mode, req.Umask, err)
}()
f, err := os.OpenFile(filepath.Join(n.srcpath(), req.Name), int(req.Flags), req.Mode&req.Umask)
f, err := os.OpenFile(filepath.Join(n.srcpath(), req.Name), int(req.Flags), req.Mode^req.Umask)
if err != nil {
return nil, nil, err
}
@@ -318,22 +324,26 @@ func (n *Node) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.C
// implicitly forgotten as part of the unmount.
// func (n *Node) Forget() { panic("TODO") }
func (n *Node) Rename(ctx context.Context, req *fuse.RenameRequest, _newDir fs.Node) error {
func (n *Node) Rename(ctx context.Context, req *fuse.RenameRequest, _newDir fs.Node) (err error) {
newDir := _newDir.(*Node)
log.Printf("[rename] node=%q oldname=%q newnode=%q newname=%q", n.path, req.NewName, newDir.path, req.OldName)
func() {
log.Printf("[rename] node=%q oldname=%q newnode=%q newname=%q -- err=%v", n.path, req.NewName, newDir.path, req.OldName, err)
}()
return os.Rename(filepath.Join(n.srcpath(), req.OldName), filepath.Join(newDir.srcpath(), req.NewName))
}
func (n *Node) Mknod(ctx context.Context, req *fuse.MknodRequest) (fs.Node, error) {
log.Printf("[mknod] node=%q name=%q mode=%#o rdev=%q newname=%q", n.path, req.Name, req.Mode, req.Rdev, req.Umask)
if err := syscall.Mknod(filepath.Join(n.srcpath(), req.Name), uint32(req.Mode&req.Umask), int(req.Rdev)); err != nil {
func (n *Node) Mknod(ctx context.Context, req *fuse.MknodRequest) (_ fs.Node, err error) {
defer func() {
log.Printf("[mknod] node=%q name=%q mode=%#o rdev=%q newname=%q -- err=%v", n.path, req.Name, req.Mode, req.Rdev, req.Umask, err)
}()
if err := syscall.Mknod(filepath.Join(n.srcpath(), req.Name), uint32(req.Mode^req.Umask), int(req.Rdev)); err != nil {
return nil, err
}
return NewNode(n.fs, filepath.Join(n.path, req.Name)), nil
}
func (n *Node) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
log.Printf("[fsync] node=%q flags=%#o dir=%v", n.path, req.Flags, req.Dir)
func (n *Node) Fsync(ctx context.Context, req *fuse.FsyncRequest) (err error) {
defer func() { log.Printf("[fsync] node=%q flags=%#o dir=%v -- err=%v", n.path, req.Flags, req.Dir, err) }()
f, err := os.Open(n.srcpath())
if err != nil {
@@ -349,35 +359,39 @@ func (n *Node) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
// node.
//
// If there is no xattr by that name, returns fuse.ErrNoXattr.
func (n *Node) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
log.Printf("[getxattr] node=%q name=%q", n.path, req.Name)
func (n *Node) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) (err error) {
defer func() { log.Printf("[getxattr] node=%q name=%q -- err=%T", n.path, req.Name, err) }()
// TODO(bbj): Handle req.Size & returned syscall.Getxattr() size.
_, err := syscall.Getxattr(n.srcpath(), req.Name, resp.Xattr)
if _, err = syscall.Getxattr(n.srcpath(), req.Name, resp.Xattr); err == syscall.ENODATA {
return fuse.ErrNoXattr
}
return err
}
// Listxattr lists the extended attributes recorded for the node.
func (n *Node) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
log.Printf("[listxattr] node=%q", n.path)
func (n *Node) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) (err error) {
defer func() { log.Printf("[listxattr] node=%q -- err=%v", n.path, err) }()
// TODO(bbj): Handle req.Size & returned syscall.Getxattr() size.
_, err := syscall.Listxattr(n.srcpath(), resp.Xattr)
_, err = syscall.Listxattr(n.srcpath(), resp.Xattr)
return err
}
// Setxattr sets an extended attribute with the given name and
// value for the node.
func (n *Node) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
log.Printf("[setxattr] node=%q name=%q data=%q flags=%#o", n.path, req.Name, string(req.Xattr), req.Flags)
func (n *Node) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) (err error) {
defer func() {
log.Printf("[setxattr] node=%q name=%q data=%q flags=%#o", n.path, req.Name, string(req.Xattr), req.Flags, err)
}()
return syscall.Setxattr(n.srcpath(), req.Name, req.Xattr, int(req.Flags))
}
// Removexattr removes an extended attribute for the name.
//
// If there is no xattr by that name, returns fuse.ErrNoXattr.
func (n *Node) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error {
log.Printf("[removexattr] node=%q name=%q", n.path, req.Name)
func (n *Node) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) (err error) {
defer func() { log.Printf("[removexattr] node=%q name=%q -- err=%v", n.path, req.Name, err) }()
return syscall.Removexattr(n.srcpath(), req.Name)
}