Re: [Qemu-devel] [PATCH 08/18] block/ssh: Propagate errors through connect_to_ssh()

["Richard W.M. Jones" <rjones@redhat.com>]

On Tue, May 13, 2014 at 06:02:42PM +0200, Markus Armbruster wrote:
> Cc: "Richard W.M. Jones" <rjones@redhat.com>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>

Reviewed-by: Richard W.M. Jones <rjones@redhat.com>

>  block/ssh.c | 34 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/block/ssh.c b/block/ssh.c
> index 18186ba..26078c4 100644
> --- a/block/ssh.c
> +++ b/block/ssh.c
> @@ -506,10 +506,9 @@ static int authenticate(BDRVSSHState *s, const char *user, Error **errp)
>  }
>  
>  static int connect_to_ssh(BDRVSSHState *s, QDict *options,
> -                          int ssh_flags, int creat_mode)
> +                          int ssh_flags, int creat_mode, Error **errp)
>  {
>      int r, ret;
> -    Error *err = NULL;
>      const char *host, *user, *path, *host_key_check;
>      int port;
>  
> @@ -528,6 +527,7 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
>      } else {
>          user = g_get_user_name();
>          if (!user) {
> +            error_setg_errno(errp, errno, "Can't get user name");
>              ret = -errno;
>              goto err;
>          }
> @@ -544,11 +544,9 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
>      s->hostport = g_strdup_printf("%s:%d", host, port);
>  
>      /* Open the socket and connect. */
> -    s->sock = inet_connect(s->hostport, &err);
> -    if (err != NULL) {
> +    s->sock = inet_connect(s->hostport, errp);
> +    if (s->sock < 0) {
>          ret = -errno;
> -        qerror_report_err(err);
> -        error_free(err);
>          goto err;
>      }
>  
> @@ -556,7 +554,7 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
>      s->session = libssh2_session_init();
>      if (!s->session) {
>          ret = -EINVAL;
> -        session_error_report(s, "failed to initialize libssh2 session");
> +        session_error_setg(errp, s, "failed to initialize libssh2 session");
>          goto err;
>      }
>  
> @@ -567,30 +565,26 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
>      r = libssh2_session_handshake(s->session, s->sock);
>      if (r != 0) {
>          ret = -EINVAL;
> -        session_error_report(s, "failed to establish SSH session");
> +        session_error_setg(errp, s, "failed to establish SSH session");
>          goto err;
>      }
>  
>      /* Check the remote host's key against known_hosts. */
> -    ret = check_host_key(s, host, port, host_key_check, &err);
> +    ret = check_host_key(s, host, port, host_key_check, errp);
>      if (ret < 0) {
> -        qerror_report_err(err);
> -        error_free(err);
>          goto err;
>      }
>  
>      /* Authenticate. */
> -    ret = authenticate(s, user, &err);
> +    ret = authenticate(s, user, errp);
>      if (ret < 0) {
> -        qerror_report_err(err);
> -        error_free(err);
>          goto err;
>      }
>  
>      /* Start SFTP. */
>      s->sftp = libssh2_sftp_init(s->session);
>      if (!s->sftp) {
> -        session_error_report(s, "failed to initialize sftp handle");
> +        session_error_setg(errp, s, "failed to initialize sftp handle");
>          ret = -EINVAL;
>          goto err;
>      }
> @@ -645,6 +639,7 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
>  static int ssh_file_open(BlockDriverState *bs, QDict *options, int bdrv_flags,
>                           Error **errp)
>  {
> +    Error *local_err = NULL;
>      BDRVSSHState *s = bs->opaque;
>      int ret;
>      int ssh_flags;
> @@ -657,8 +652,10 @@ static int ssh_file_open(BlockDriverState *bs, QDict *options, int bdrv_flags,
>      }
>  
>      /* Start up SSH. */
> -    ret = connect_to_ssh(s, options, ssh_flags, 0);
> +    ret = connect_to_ssh(s, options, ssh_flags, 0, &local_err);
>      if (ret < 0) {
> +        qerror_report_err(local_err);
> +        error_free(local_err);
>          goto err;
>      }
>  
> @@ -718,8 +715,11 @@ static int ssh_create(const char *filename, QEMUOptionParameter *options,
>  
>      r = connect_to_ssh(&s, uri_options,
>                         LIBSSH2_FXF_READ|LIBSSH2_FXF_WRITE|
> -                       LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC, 0644);
> +                       LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,
> +                       0644, &local_err);
>      if (r < 0) {
> +        qerror_report_err(local_err);
> +        error_free(local_err);
>          ret = r;
>          goto out;
>      }
> -- 
> 1.8.1.4

-- 
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