libvirt/tools/virsh-nwfilter.c
Eric Blake 31ef0836a7 virsh: fix regression in 'virsh event' by domain
Commit a0670ae caused a regression in 'virsh event' and
'virsh qemu-monitor-event' - if a user tries to filter the
command to a specific domain, an error message is printed:

$ virsh event dom --loop
error: internal error: virsh qemu-monitor-event: no domain VSH_OT_DATA option

and then the command continues as though no domain had been
supplied (giving events for ALL domains, instead of the
requested one).  This is because the code was incorrectly
assuming that all "domain" options would be supplied via a
mandatory VSH_OT_DATA, even though "domain" is optional for
these two commands, so we had changed them to VSH_OT_STRING
to quit failing for other reasons (ever since it was decided
that VSH_OT_DATA and VSH_OT_STRING should no longer be
synonyms).

In looking at the situation, though, the code for looking up
a domain was making a pointless check for whether the option
exists prior to finding the option's string value, as
vshCommandOptStringReq does just fine at reporting any errors
when looking up a string whether or not the option was present.

So this is a case of regression fixing by pure code deletion :)

* tools/virsh-domain.c (vshCommandOptDomainBy): Drop useless filter.
* tools/virsh-interface.c (vshCommandOptInterfaceBy): Likewise.
* tools/virsh-network.c (vshCommandOptNetworkBy): Likewise.
* tools/virsh-nwfilter.c (vshCommandOptNWFilterBy): Likewise.
* tools/virsh-secret.c (vshCommandOptSecret): Likewise.
* tools/virsh.h (vshCmdHasOption): Drop unused function.
* tools/virsh.c (vshCmdHasOption): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2015-04-15 08:13:53 -06:00

474 lines
12 KiB
C

/*
* virsh-nwfilter.c: Commands to manage network filters
*
* Copyright (C) 2005, 2007-2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Daniel Veillard <veillard@redhat.com>
* Karel Zak <kzak@redhat.com>
* Daniel P. Berrange <berrange@redhat.com>
*
*/
#include <config.h>
#include "virsh-nwfilter.h"
#include "internal.h"
#include "virbuffer.h"
#include "viralloc.h"
#include "virfile.h"
#include "virutil.h"
virNWFilterPtr
vshCommandOptNWFilterBy(vshControl *ctl, const vshCmd *cmd,
const char **name, unsigned int flags)
{
virNWFilterPtr nwfilter = NULL;
const char *n = NULL;
const char *optname = "nwfilter";
virCheckFlags(VSH_BYUUID | VSH_BYNAME, NULL);
if (vshCommandOptStringReq(ctl, cmd, optname, &n) < 0)
return NULL;
vshDebug(ctl, VSH_ERR_INFO, "%s: found option <%s>: %s\n",
cmd->def->name, optname, n);
if (name)
*name = n;
/* try it by UUID */
if ((flags & VSH_BYUUID) && strlen(n) == VIR_UUID_STRING_BUFLEN-1) {
vshDebug(ctl, VSH_ERR_DEBUG, "%s: <%s> trying as nwfilter UUID\n",
cmd->def->name, optname);
nwfilter = virNWFilterLookupByUUIDString(ctl->conn, n);
}
/* try it by NAME */
if (!nwfilter && (flags & VSH_BYNAME)) {
vshDebug(ctl, VSH_ERR_DEBUG, "%s: <%s> trying as nwfilter NAME\n",
cmd->def->name, optname);
nwfilter = virNWFilterLookupByName(ctl->conn, n);
}
if (!nwfilter)
vshError(ctl, _("failed to get nwfilter '%s'"), n);
return nwfilter;
}
/*
* "nwfilter-define" command
*/
static const vshCmdInfo info_nwfilter_define[] = {
{.name = "help",
.data = N_("define or update a network filter from an XML file")
},
{.name = "desc",
.data = N_("Define a new network filter or update an existing one.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_nwfilter_define[] = {
{.name = "file",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("file containing an XML network filter description")
},
{.name = NULL}
};
static bool
cmdNWFilterDefine(vshControl *ctl, const vshCmd *cmd)
{
virNWFilterPtr nwfilter;
const char *from = NULL;
bool ret = true;
char *buffer;
if (vshCommandOptStringReq(ctl, cmd, "file", &from) < 0)
return false;
if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0)
return false;
nwfilter = virNWFilterDefineXML(ctl->conn, buffer);
VIR_FREE(buffer);
if (nwfilter != NULL) {
vshPrint(ctl, _("Network filter %s defined from %s\n"),
virNWFilterGetName(nwfilter), from);
virNWFilterFree(nwfilter);
} else {
vshError(ctl, _("Failed to define network filter from %s"), from);
ret = false;
}
return ret;
}
/*
* "nwfilter-undefine" command
*/
static const vshCmdInfo info_nwfilter_undefine[] = {
{.name = "help",
.data = N_("undefine a network filter")
},
{.name = "desc",
.data = N_("Undefine a given network filter.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_nwfilter_undefine[] = {
{.name = "nwfilter",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("network filter name or uuid")
},
{.name = NULL}
};
static bool
cmdNWFilterUndefine(vshControl *ctl, const vshCmd *cmd)
{
virNWFilterPtr nwfilter;
bool ret = true;
const char *name;
if (!(nwfilter = vshCommandOptNWFilter(ctl, cmd, &name)))
return false;
if (virNWFilterUndefine(nwfilter) == 0) {
vshPrint(ctl, _("Network filter %s undefined\n"), name);
} else {
vshError(ctl, _("Failed to undefine network filter %s"), name);
ret = false;
}
virNWFilterFree(nwfilter);
return ret;
}
/*
* "nwfilter-dumpxml" command
*/
static const vshCmdInfo info_nwfilter_dumpxml[] = {
{.name = "help",
.data = N_("network filter information in XML")
},
{.name = "desc",
.data = N_("Output the network filter information as an XML dump to stdout.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_nwfilter_dumpxml[] = {
{.name = "nwfilter",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("network filter name or uuid")
},
{.name = NULL}
};
static bool
cmdNWFilterDumpXML(vshControl *ctl, const vshCmd *cmd)
{
virNWFilterPtr nwfilter;
bool ret = true;
char *dump;
if (!(nwfilter = vshCommandOptNWFilter(ctl, cmd, NULL)))
return false;
dump = virNWFilterGetXMLDesc(nwfilter, 0);
if (dump != NULL) {
vshPrint(ctl, "%s", dump);
VIR_FREE(dump);
} else {
ret = false;
}
virNWFilterFree(nwfilter);
return ret;
}
static int
vshNWFilterSorter(const void *a, const void *b)
{
virNWFilterPtr *fa = (virNWFilterPtr *) a;
virNWFilterPtr *fb = (virNWFilterPtr *) b;
if (*fa && !*fb)
return -1;
if (!*fa)
return *fb != NULL;
return vshStrcasecmp(virNWFilterGetName(*fa),
virNWFilterGetName(*fb));
}
struct vshNWFilterList {
virNWFilterPtr *filters;
size_t nfilters;
};
typedef struct vshNWFilterList *vshNWFilterListPtr;
static void
vshNWFilterListFree(vshNWFilterListPtr list)
{
size_t i;
if (list && list->filters) {
for (i = 0; i < list->nfilters; i++) {
if (list->filters[i])
virNWFilterFree(list->filters[i]);
}
VIR_FREE(list->filters);
}
VIR_FREE(list);
}
static vshNWFilterListPtr
vshNWFilterListCollect(vshControl *ctl,
unsigned int flags)
{
vshNWFilterListPtr list = vshMalloc(ctl, sizeof(*list));
size_t i;
int ret;
virNWFilterPtr filter;
bool success = false;
size_t deleted = 0;
int nfilters = 0;
char **names = NULL;
/* try the list with flags support (0.10.2 and later) */
if ((ret = virConnectListAllNWFilters(ctl->conn,
&list->filters,
flags)) >= 0) {
list->nfilters = ret;
goto finished;
}
/* check if the command is actually supported */
if (last_error && last_error->code == VIR_ERR_NO_SUPPORT) {
vshResetLibvirtError();
goto fallback;
}
/* there was an error during the call */
vshError(ctl, "%s", _("Failed to list node filters"));
goto cleanup;
fallback:
/* fall back to old method (0.9.13 and older) */
vshResetLibvirtError();
nfilters = virConnectNumOfNWFilters(ctl->conn);
if (nfilters < 0) {
vshError(ctl, "%s", _("Failed to count network filters"));
goto cleanup;
}
if (nfilters == 0)
return list;
names = vshMalloc(ctl, sizeof(char *) * nfilters);
nfilters = virConnectListNWFilters(ctl->conn, names, nfilters);
if (nfilters < 0) {
vshError(ctl, "%s", _("Failed to list network filters"));
goto cleanup;
}
list->filters = vshMalloc(ctl, sizeof(virNWFilterPtr) * nfilters);
list->nfilters = 0;
/* get the network filters */
for (i = 0; i < nfilters; i++) {
if (!(filter = virNWFilterLookupByName(ctl->conn, names[i])))
continue;
list->filters[list->nfilters++] = filter;
}
/* truncate network filters that weren't found */
deleted = nfilters - list->nfilters;
finished:
/* sort the list */
if (list->filters && list->nfilters)
qsort(list->filters, list->nfilters,
sizeof(*list->filters), vshNWFilterSorter);
/* truncate the list for not found filter objects */
if (deleted)
VIR_SHRINK_N(list->filters, list->nfilters, deleted);
success = true;
cleanup:
for (i = 0; nfilters != -1 && i < nfilters; i++)
VIR_FREE(names[i]);
VIR_FREE(names);
if (!success) {
vshNWFilterListFree(list);
list = NULL;
}
return list;
}
/*
* "nwfilter-list" command
*/
static const vshCmdInfo info_nwfilter_list[] = {
{.name = "help",
.data = N_("list network filters")
},
{.name = "desc",
.data = N_("Returns list of network filters.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_nwfilter_list[] = {
{.name = NULL}
};
static bool
cmdNWFilterList(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
size_t i;
char uuid[VIR_UUID_STRING_BUFLEN];
vshNWFilterListPtr list = NULL;
if (!(list = vshNWFilterListCollect(ctl, 0)))
return false;
vshPrintExtra(ctl, " %-36s %-20s \n", _("UUID"), _("Name"));
vshPrintExtra(ctl, "---------------------------------"
"---------------------------------\n");
for (i = 0; i < list->nfilters; i++) {
virNWFilterPtr nwfilter = list->filters[i];
virNWFilterGetUUIDString(nwfilter, uuid);
vshPrint(ctl, " %-36s %-20s\n",
uuid,
virNWFilterGetName(nwfilter));
}
vshNWFilterListFree(list);
return true;
}
/*
* "nwfilter-edit" command
*/
static const vshCmdInfo info_nwfilter_edit[] = {
{.name = "help",
.data = N_("edit XML configuration for a network filter")
},
{.name = "desc",
.data = N_("Edit the XML configuration for a network filter.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_nwfilter_edit[] = {
{.name = "nwfilter",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("network filter name or uuid")
},
{.name = NULL}
};
static bool
cmdNWFilterEdit(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
virNWFilterPtr nwfilter = NULL;
virNWFilterPtr nwfilter_edited = NULL;
nwfilter = vshCommandOptNWFilter(ctl, cmd, NULL);
if (nwfilter == NULL)
goto cleanup;
#define EDIT_GET_XML virNWFilterGetXMLDesc(nwfilter, 0)
#define EDIT_NOT_CHANGED \
do { \
vshPrint(ctl, _("Network filter %s XML " \
"configuration not changed.\n"), \
virNWFilterGetName(nwfilter)); \
ret = true; \
goto edit_cleanup; \
} while (0)
#define EDIT_DEFINE \
(nwfilter_edited = virNWFilterDefineXML(ctl->conn, doc_edited))
#include "virsh-edit.c"
vshPrint(ctl, _("Network filter %s XML configuration edited.\n"),
virNWFilterGetName(nwfilter_edited));
ret = true;
cleanup:
if (nwfilter)
virNWFilterFree(nwfilter);
if (nwfilter_edited)
virNWFilterFree(nwfilter_edited);
return ret;
}
const vshCmdDef nwfilterCmds[] = {
{.name = "nwfilter-define",
.handler = cmdNWFilterDefine,
.opts = opts_nwfilter_define,
.info = info_nwfilter_define,
.flags = 0
},
{.name = "nwfilter-dumpxml",
.handler = cmdNWFilterDumpXML,
.opts = opts_nwfilter_dumpxml,
.info = info_nwfilter_dumpxml,
.flags = 0
},
{.name = "nwfilter-edit",
.handler = cmdNWFilterEdit,
.opts = opts_nwfilter_edit,
.info = info_nwfilter_edit,
.flags = 0
},
{.name = "nwfilter-list",
.handler = cmdNWFilterList,
.opts = opts_nwfilter_list,
.info = info_nwfilter_list,
.flags = 0
},
{.name = "nwfilter-undefine",
.handler = cmdNWFilterUndefine,
.opts = opts_nwfilter_undefine,
.info = info_nwfilter_undefine,
.flags = 0
},
{.name = NULL}
};