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util: helper functions for fibre channel devices
We will need some convenient helper functions for managing sysfs-entries for fibre channel-backed devices. Let's implement them and make them available in the private API. Signed-off-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
This commit is contained in:
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c7cfcc57d5
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@ -206,6 +206,7 @@ src/util/virdnsmasq.c
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src/util/virerror.c
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src/util/virerror.h
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src/util/vireventpoll.c
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src/util/virfcp.c
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src/util/virfdstream.c
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src/util/virfile.c
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src/util/virfirewall.c
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@ -117,6 +117,7 @@ UTIL_SOURCES = \
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util/virerror.c util/virerror.h \
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util/virevent.c util/virevent.h \
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util/vireventpoll.c util/vireventpoll.h \
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util/virfcp.c util/virfcp.h \
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util/virfdstream.c util/virfdstream.h \
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util/virfile.c util/virfile.h \
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util/virfirewall.c util/virfirewall.h \
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@ -1586,6 +1586,11 @@ virEventPollUpdateHandle;
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virEventPollUpdateTimeout;
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# util/virfcp.h
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virFCIsCapableRport;
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virFCReadRportValue;
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# util/virfdstream.h
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virFDStreamConnectUNIX;
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virFDStreamCreateFile;
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98
src/util/virfcp.c
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98
src/util/virfcp.c
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@ -0,0 +1,98 @@
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/*
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* virfcp.c: Utility functions for the Fibre Channel Protocol
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*
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* Copyright (C) 2017 IBM Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Bjoern Walk <bwalk@linux.vnet.ibm.com>
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*/
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#include <config.h>
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#include "internal.h"
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#include "viralloc.h"
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#include "virfile.h"
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#include "virstring.h"
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#include "virfcp.h"
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#define VIR_FROM_THIS VIR_FROM_NONE
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#ifdef __linux__
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# define SYSFS_FC_RPORT_PATH "/sys/class/fc_remote_ports"
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bool
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virFCIsCapableRport(const char *rport)
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{
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bool ret = false;
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char *path = NULL;
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if (virBuildPath(&path, SYSFS_FC_RPORT_PATH, rport) < 0)
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return false;
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ret = virFileExists(path);
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VIR_FREE(path);
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return ret;
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}
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int
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virFCReadRportValue(const char *rport,
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const char *entry,
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char **result)
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{
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int ret = -1;
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char *buf = NULL, *p = NULL;
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if (virFileReadValueString(&buf, "%s/%s/%s",
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SYSFS_FC_RPORT_PATH, rport, entry) < 0) {
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return -1;
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}
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if ((p = strchr(buf, '\n')))
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*p = '\0';
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if (VIR_STRDUP(*result, buf) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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VIR_FREE(buf);
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return ret;
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}
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#else
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bool
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virSysfsIsCapableFCRport(const char *rport ATTRIBUTE_UNUSED)
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{
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virReportSystemError(ENOSYS, "%s", _("Not supported on this platform"));
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return false;
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}
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int
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virSysfsReadFCRport(const char *rport ATTRIBUTE_UNUSED,
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const char *entry ATTRIBUTE_UNUSED,
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char **result ATTRIBUTE_UNUSED)
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{
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virReportSystemError(ENOSYS, "%s", _("Not supported on this platform"));
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return -1;
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}
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#endif
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34
src/util/virfcp.h
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34
src/util/virfcp.h
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@ -0,0 +1,34 @@
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/*
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* virfcp.h: Utility functions for the Fibre Channel Protocol
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*
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* Copyright (C) 2017 IBM Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Bjoern Walk <bwalk@linux.vnet.ibm.com>
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*/
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#ifndef __VIR_FCP_H__
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# define __VIR_FCP_H__
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bool
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virFCIsCapableRport(const char *rport);
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int
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virFCReadRportValue(const char *rport,
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const char *entry,
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char **result);
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#endif
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