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sftp: Add debug log messages

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This commit is contained in:
Alexander Neumann 2016-08-28 19:47:12 +02:00
parent cdbdf74811
commit 22bde5b277
1 changed files with 9 additions and 0 deletions
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9
src/restic/backend/sftp/sftp.go
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@ -104,6 +104,7 @@ func (r *SFTP) clientError() error {
// is expected at the given path. `dir` must be delimited by forward slashes
// ("/"), which is required by sftp.
func Open(dir string, program string, args ...string) (*SFTP, error) {
debug.Log("sftp.Open", "open backend with program %v, %v at %v", program, args, dir)
sftp, err := startClient(program, args...)
if err != nil {
return nil, err
@ -138,6 +139,7 @@ func buildSSHCommand(cfg Config) []string {
// OpenWithConfig opens an sftp backend as described by the config by running
// "ssh" with the appropiate arguments.
func OpenWithConfig(cfg Config) (*SFTP, error) {
debug.Log("sftp.OpenWithConfig", "open with config %v", cfg)
return Open(cfg.Dir, "ssh", buildSSHCommand(cfg)...)
}
@ -311,6 +313,7 @@ func (r *SFTP) dirname(t backend.Type, name string) string {
// Load returns the data stored in the backend for h at the given offset
// and saves it in p. Load has the same semantics as io.ReaderAt.
func (r *SFTP) Load(h backend.Handle, p []byte, off int64) (n int, err error) {
debug.Log("sftp.Load", "load %v, %d bytes, offset %v", h, len(p), off)
if err := r.clientError(); err != nil {
return 0, err
}
@ -347,6 +350,7 @@ func (r *SFTP) Load(h backend.Handle, p []byte, off int64) (n int, err error) {
// Save stores data in the backend at the handle.
func (r *SFTP) Save(h backend.Handle, p []byte) (err error) {
debug.Log("sftp.Save", "save %v bytes to %v", h, len(p))
if err := r.clientError(); err != nil {
return err
}
@ -388,6 +392,7 @@ func (r *SFTP) Save(h backend.Handle, p []byte) (err error) {
// Stat returns information about a blob.
func (r *SFTP) Stat(h backend.Handle) (backend.BlobInfo, error) {
debug.Log("sftp.Stat", "stat %v", h)
if err := r.clientError(); err != nil {
return backend.BlobInfo{}, err
}
@ -406,6 +411,7 @@ func (r *SFTP) Stat(h backend.Handle) (backend.BlobInfo, error) {
// Test returns true if a blob of the given type and name exists in the backend.
func (r *SFTP) Test(t backend.Type, name string) (bool, error) {
debug.Log("sftp.Test", "type %v, name %v", t, name)
if err := r.clientError(); err != nil {
return false, err
}
@ -424,6 +430,7 @@ func (r *SFTP) Test(t backend.Type, name string) (bool, error) {
// Remove removes the content stored at name.
func (r *SFTP) Remove(t backend.Type, name string) error {
debug.Log("sftp.Remove", "type %v, name %v", t, name)
if err := r.clientError(); err != nil {
return err
}
@ -435,6 +442,7 @@ func (r *SFTP) Remove(t backend.Type, name string) error {
// goroutine is started for this. If the channel done is closed, sending
// stops.
func (r *SFTP) List(t backend.Type, done <-chan struct{}) <-chan string {
debug.Log("sftp.List", "list all %v", t)
ch := make(chan string)
go func() {
@ -503,6 +511,7 @@ var closeTimeout = 2 * time.Second
// Close closes the sftp connection and terminates the underlying command.
func (r *SFTP) Close() error {
debug.Log("sftp.Close", "")
if r == nil {
return nil
}