diff options
Diffstat (limited to 'src/node_device_hal_linux.c')
| -rw-r--r-- | src/node_device_hal_linux.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/node_device_hal_linux.c b/src/node_device_hal_linux.c new file mode 100644 index 000000000..b76235daa --- /dev/null +++ b/src/node_device_hal_linux.c @@ -0,0 +1,189 @@ +/* + * node_device_hal_linuc.c: Linux specific code to gather device data + * not available through HAL. + * + * Copyright (C) 2009 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <config.h> + +#include <fcntl.h> + +#include "node_device.h" +#include "node_device_hal.h" +#include "virterror_internal.h" +#include "memory.h" +#include "logging.h" + +#define VIR_FROM_THIS VIR_FROM_NODEDEV + +#ifdef __linux__ + +int check_fc_host_linux(union _virNodeDevCapData *d) +{ + char *sysfs_path = NULL; + char *wwnn_path = NULL; + char *wwpn_path = NULL; + char *p = NULL; + int fd = -1, retval = 0; + char buf[64]; + struct stat st; + + VIR_DEBUG(_("Checking if host%d is an FC HBA"), d->scsi_host.host); + + if (virAsprintf(&sysfs_path, "%s/host%d", + LINUX_SYSFS_FC_HOST_PREFIX, + d->scsi_host.host) < 0) { + virReportOOMError(NULL); + retval = -1; + goto out; + } + + if (stat(sysfs_path, &st) != 0) { + /* Not an FC HBA; not an error, either. */ + goto out; + } + + d->scsi_host.flags |= VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST; + + if (virAsprintf(&wwnn_path, "%s/node_name", + sysfs_path) < 0) { + virReportOOMError(NULL); + retval = -1; + goto out; + } + + if ((fd = open(wwnn_path, O_RDONLY)) < 0) { + retval = -1; + VIR_ERROR(_("Failed to open WWNN path '%s' for reading"), + wwnn_path); + goto out; + } + + memset(buf, 0, sizeof(buf)); + if (saferead(fd, buf, sizeof(buf)) < 0) { + retval = -1; + VIR_ERROR(_("Failed to read WWNN from '%s'"), + wwnn_path); + goto out; + } + + close(fd); + fd = -1; + + p = strstr(buf, "0x"); + if (p != NULL) { + p += strlen("0x"); + } else { + p = buf; + } + + d->scsi_host.wwnn = strndup(p, sizeof(buf)); + if (d->scsi_host.wwnn == NULL) { + virReportOOMError(NULL); + retval = -1; + goto out; + } + + p = strchr(d->scsi_host.wwnn, '\n'); + if (p != NULL) { + *p = '\0'; + } + + if (virAsprintf(&wwpn_path, "%s/port_name", + sysfs_path) < 0) { + virReportOOMError(NULL); + retval = -1; + goto out; + } + + if ((fd = open(wwpn_path, O_RDONLY)) < 0) { + retval = -1; + VIR_ERROR(_("Failed to open WWPN path '%s' for reading"), + wwpn_path); + goto out; + } + + memset(buf, 0, sizeof(buf)); + if (saferead(fd, buf, sizeof(buf)) < 0) { + retval = -1; + VIR_ERROR(_("Failed to read WWPN from '%s'"), + wwpn_path); + goto out; + } + + close(fd); + fd = -1; + + p = strstr(buf, "0x"); + if (p != NULL) { + p += strlen("0x"); + } else { + p = buf; + } + + d->scsi_host.wwpn = strndup(p, sizeof(buf)); + if (d->scsi_host.wwpn == NULL) { + virReportOOMError(NULL); + retval = -1; + goto out; + } + + p = strchr(d->scsi_host.wwpn, '\n'); + if (p != NULL) { + *p = '\0'; + } + +out: + if (fd != -1) { + close(fd); + } + VIR_FREE(sysfs_path); + VIR_FREE(wwnn_path); + VIR_FREE(wwpn_path); + return 0; +} + + +int check_vport_capable_linux(union _virNodeDevCapData *d) +{ + char *sysfs_path = NULL; + struct stat st; + int retval = 0; + + if (virAsprintf(&sysfs_path, "%s/host%d/vport_create", + LINUX_SYSFS_FC_HOST_PREFIX, + d->scsi_host.host) < 0) { + virReportOOMError(NULL); + retval = -1; + goto out; + } + + if (stat(sysfs_path, &st) != 0) { + /* Not a vport capable HBA; not an error, either. */ + goto out; + } + + d->scsi_host.flags |= VIR_NODE_DEV_CAP_FLAG_HBA_VPORT_OPS; + +out: + VIR_FREE(sysfs_path); + return retval; +} + +#endif /* __linux__ */ |