From: Max Reitz <mre...@redhat.com>
Using QemuOpts will prevent qemu from crashing if the input options have
not been validated (which is the case when they are specified on the
command line or in a json: filename) and some have the wrong type.
Signed-off-by: Max Reitz <mre...@redhat.com>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block/ssh.c | 79 ++++++++++++++++++++++++++++++++++++++++++-------------------
1 file changed, 55 insertions(+), 24 deletions(-)
diff --git a/block/ssh.c b/block/ssh.c
index bcbb0e4..5ce12b6 100644
--- a/block/ssh.c
+++ b/block/ssh.c
@@ -508,36 +508,73 @@ static int authenticate(BDRVSSHState *s, const char
*user, Error **errp)
return ret;
}
+static QemuOptsList ssh_runtime_opts = {
+ .name = "ssh",
+ .head = QTAILQ_HEAD_INITIALIZER(ssh_runtime_opts.head),
+ .desc = {
+ {
+ .name = "host",
+ .type = QEMU_OPT_STRING,
+ .help = "Host to connect to",
+ },
+ {
+ .name = "port",
+ .type = QEMU_OPT_NUMBER,
+ .help = "Port to connect to",
+ },
+ {
+ .name = "path",
+ .type = QEMU_OPT_STRING,
+ .help = "Path of the image on the host",
+ },
+ {
+ .name = "user",
+ .type = QEMU_OPT_STRING,
+ .help = "User as which to connect",
+ },
+ {
+ .name = "host_key_check",
+ .type = QEMU_OPT_STRING,
+ .help = "Defines how and what to check the host key against",
+ },
+ },
+};
+
static int connect_to_ssh(BDRVSSHState *s, QDict *options,
int ssh_flags, int creat_mode, Error **errp)
{
int r, ret;
+ QemuOpts *opts = NULL;
+ Error *local_err = NULL;
const char *host, *user, *path, *host_key_check;
int port;
- if (!qdict_haskey(options, "host")) {
+ opts = qemu_opts_create(&ssh_runtime_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, options, &local_err);
+ if (local_err) {
ret = -EINVAL;
- error_setg(errp, "No hostname was specified");
+ error_propagate(errp, local_err);
goto err;
}
- host = qdict_get_str(options, "host");
- if (qdict_haskey(options, "port")) {
- port = qdict_get_int(options, "port");
- } else {
- port = 22;
+ host = qemu_opt_get(opts, "host");
+ if (!host) {
+ ret = -EINVAL;
+ error_setg(errp, "No hostname was specified");
+ goto err;
}
- if (!qdict_haskey(options, "path")) {
+ port = qemu_opt_get_number(opts, "port", 22);
+
+ path = qemu_opt_get(opts, "path");
+ if (!path) {
ret = -EINVAL;
error_setg(errp, "No path was specified");
goto err;
}
- path = qdict_get_str(options, "path");
- if (qdict_haskey(options, "user")) {
- user = qdict_get_str(options, "user");
- } else {
+ user = qemu_opt_get(opts, "user");
+ if (!user) {
user = g_get_user_name();
if (!user) {
error_setg_errno(errp, errno, "Can't get user name");
@@ -546,9 +583,8 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
}
}
- if (qdict_haskey(options, "host_key_check")) {
- host_key_check = qdict_get_str(options, "host_key_check");
- } else {
+ host_key_check = qemu_opt_get(opts, "host_key_check");
+ if (!host_key_check) {
host_key_check = "yes";
}
@@ -612,21 +648,14 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
goto err;
}
+ qemu_opts_del(opts);
+
r = libssh2_sftp_fstat(s->sftp_handle, &s->attrs);
if (r < 0) {
sftp_error_setg(errp, s, "failed to read file attributes");
return -EINVAL;
}
- /* Delete the options we've used; any not deleted will cause the
- * block layer to give an error about unused options.
- */
- qdict_del(options, "host");
- qdict_del(options, "port");
- qdict_del(options, "user");
- qdict_del(options, "path");
- qdict_del(options, "host_key_check");
-
return 0;
err:
@@ -646,6 +675,8 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
}
s->session = NULL;
+ qemu_opts_del(opts);
+
return ret;
}
--
1.8.3.1
