Re: [PATCH V4 01/18] lib: virDomain{Save,Restore}Params: Ensure absolute path

When invoking virDomainSaveParams with a relative path, the image is saved to the daemon's CWD. Similarly, when providing virDomainRestoreParams with a relative path, it attempts to restore from the daemon's CWD. In most configurations, the daemon's CWD is set to '/'. Ensure a relative path is converted to absolute before invoking the driver domain{Save,Restore}Params functions.

Signed-off-by: Jim Fehlig <jfehlig(a)suse.com&gt; --- src/libvirt-domain.c | 89 ++++++++++++++++++++++++++++++++++++-------- 1 file changed, 73 insertions(+), 16 deletions(-) diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c index 18451ebdb9..0ee7c6f45b 100644 --- a/src/libvirt-domain.c +++ b/src/libvirt-domain.c @@ -1023,6 +1023,11 @@ virDomainSaveParams(virDomainPtr domain, unsigned int flags) { virConnectPtr conn; + virTypedParameterPtr params_copy = NULL; + int nparams_copy = 0; + const char *to = NULL; + g_autofree char *absolute_to = NULL; + int ret = -1; VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=0x%x", params, nparams, flags); @@ -1033,23 +1038,46 @@ virDomainSaveParams(virDomainPtr domain, virCheckDomainReturn(domain, -1); conn = domain->conn; - virCheckReadOnlyGoto(conn->flags, error); + virCheckReadOnlyGoto(conn->flags, done); VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING, VIR_DOMAIN_SAVE_PAUSED, - error); + done); + + /* We must absolutize the file path as the save is done out of process */ + virTypedParamsCopy(&params_copy, params, nparams); + nparams_copy = nparams; + if (virTypedParamsGetString(params_copy, nparams_copy, + VIR_DOMAIN_SAVE_PARAM_FILE, &to) < 0) + goto done; + + if (to) { + if (!(absolute_to = g_canonicalize_filename(to, NULL))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("could not build absolute output file path")); + goto done; + } + + if (virTypedParamsReplaceString(&params_copy, &nparams_copy, + VIR_DOMAIN_SAVE_PARAM_FILE, + absolute_to) < 0) + goto done; + } if (conn->driver->domainSaveParams) { - if (conn->driver->domainSaveParams(domain, params, nparams, flags) < 0) - goto error; - return 0; + if (conn->driver->domainSaveParams(domain, params_copy, nparams_copy, flags) < 0) + goto done; + ret = 0; + } else { + virReportUnsupportedError(); } - virReportUnsupportedError(); + done: + if (ret < 0) + virDispatchError(domain->conn); + virTypedParamsFree(params_copy, nparams_copy); - error: - virDispatchError(domain->conn); - return -1; + return ret; } @@ -1206,6 +1234,12 @@ virDomainRestoreParams(virConnectPtr conn, virTypedParameterPtr params, int nparams, unsigned int flags) { + virTypedParameterPtr params_copy = NULL; + int nparams_copy = 0; + const char *from = NULL; + g_autofree char *absolute_from = NULL; + int ret = -1; + VIR_DEBUG("conn=%p, params=%p, nparams=%d, flags=0x%x", conn, params, nparams, flags); VIR_TYPED_PARAMS_DEBUG(params, nparams); @@ -1213,23 +1247,46 @@ virDomainRestoreParams(virConnectPtr conn, virResetLastError(); virCheckConnectReturn(conn, -1); - virCheckReadOnlyGoto(conn->flags, error); + virCheckReadOnlyGoto(conn->flags, done); VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING, VIR_DOMAIN_SAVE_PAUSED, - error); + done); if (conn->driver->domainRestoreParams) { + /* We must absolutize the file path as the save is done out of process */ + virTypedParamsCopy(&params_copy, params, nparams); + nparams_copy = nparams; + if (virTypedParamsGetString(params_copy, nparams_copy, + VIR_DOMAIN_SAVE_PARAM_FILE, &from) < 0) + goto done; + + if (from) { + if (!(absolute_from = g_canonicalize_filename(from, NULL))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("could not build absolute output file path")); + goto done; + } + + if (virTypedParamsReplaceString(&params_copy, &nparams_copy, + VIR_DOMAIN_SAVE_PARAM_FILE, + absolute_from) < 0) + goto done; + } + if (conn->driver->domainRestoreParams(conn, params, nparams, flags) < 0) - goto error; - return 0; + goto done; + ret = 0; } virReportUnsupportedError(); - error: - virDispatchError(conn); - return -1; + done: + if (ret < 0) + virDispatchError(conn); + virTypedParamsFree(params_copy, nparams_copy); + + return ret; } -- 2.43.0