Signed-off-by: Haiying Tang <Tang_Haiying@xxxxxxx>
Signed-off-by: Eric Anderle <eanderle@xxxxxxxxx>
Signed-off-by: Jim Rees <rees@xxxxxxxxx>
---
configure.ac | 4 +
utils/Makefile.am | 4 +
utils/blkmapd/Makefile.am | 63 ++++
utils/blkmapd/atomicio.c | 58 ++++
utils/blkmapd/cfg.c | 272 +++++++++++++++++
utils/blkmapd/cfg.h | 48 +++
utils/blkmapd/device-discovery.c | 542 ++++++++++++++++++++++++++++++++++
utils/blkmapd/device-discovery.h | 162 ++++++++++
utils/blkmapd/device-inq.c | 235 +++++++++++++++
utils/blkmapd/device-process.c | 391 ++++++++++++++++++++++++
utils/blkmapd/dm-device.c | 509 +++++++++++++++++++++++++++++++
utils/blkmapd/etc/initd/initd.redhat | 76 +++++
utils/blkmapd/etc/pnfs-block.conf | 10 +
13 files changed, 2374 insertions(+), 0 deletions(-)
create mode 100644 utils/blkmapd/Makefile.am
create mode 100644 utils/blkmapd/atomicio.c
create mode 100644 utils/blkmapd/cfg.c
create mode 100644 utils/blkmapd/cfg.h
create mode 100644 utils/blkmapd/device-discovery.c
create mode 100644 utils/blkmapd/device-discovery.h
create mode 100644 utils/blkmapd/device-inq.c
create mode 100644 utils/blkmapd/device-process.c
create mode 100644 utils/blkmapd/dm-device.c
create mode 100644 utils/blkmapd/etc/initd/initd.redhat
create mode 100644 utils/blkmapd/etc/pnfs-block.conf
diff --git a/configure.ac b/configure.ac
index 4d12715..f57cd45 100644
--- a/configure.ac
+++ b/configure.ac
@@ -64,12 +64,15 @@ AC_ARG_ENABLE(nfsv4,
enable_nfsv4=yes)
if test "$enable_nfsv4" = yes; then
AC_DEFINE(NFS4_SUPPORTED, 1, [Define this if you want NFSv4 support compiled in])
+ BLKMAPD=blkmapd
IDMAPD=idmapd
SPNFSD=spnfsd
else
enable_nfsv4=
+ BLKMAPD=
IDMAPD=
fi
+ AC_SUBST(BLKMAPD)
AC_SUBST(IDMAPD)
AC_SUBST(enable_nfsv4)
AM_CONDITIONAL(CONFIG_NFSV4, [test "$enable_nfsv4" = "yes"])
@@ -429,6 +432,7 @@ AC_CONFIG_FILES([
tools/mountstats/Makefile
tools/nfs-iostat/Makefile
utils/Makefile
+ utils/blkmapd/Makefile
utils/exportfs/Makefile
utils/gssd/Makefile
utils/idmapd/Makefile
diff --git a/utils/Makefile.am b/utils/Makefile.am
index c777d21..c33835a 100644
--- a/utils/Makefile.am
+++ b/utils/Makefile.am
@@ -10,6 +10,10 @@ if CONFIG_NFSV4
OPTDIRS += spnfsd
endif
+if CONFIG_NFSV4
+OPTDIRS += blkmapd
+endif
+
if CONFIG_GSS
OPTDIRS += gssd
endif
diff --git a/utils/blkmapd/Makefile.am b/utils/blkmapd/Makefile.am
new file mode 100644
index 0000000..e8c9fc0
--- /dev/null
+++ b/utils/blkmapd/Makefile.am
@@ -0,0 +1,63 @@
+## Process this file with automake to produce Makefile.in
+
+#man8_MANS = blkmapd.man
+
+RPCPREFIX = rpc.
+KPREFIX = @kprefix@
+sbin_PROGRAMS = blkmapd
+
+blkmapd_SOURCES = \
+ atomicio.c \
+ cfg.c \
+ device-discovery.c \
+ device-inq.c \
+ device-process.c \
+ dm-device.c \
+ \
+ cfg.h \
+ device-discovery.h
+
+blkmapd_LDADD = -ldevmapper ../../support/nfs/libnfs.a
+
+MAINTAINERCLEANFILES = Makefile.in
+
+#######################################################################
+# The following allows the current practice of having
+# daemons renamed during the install to include RPCPREFIX
+# and the KPREFIX
+# This could all be done much easier with program_transform_name
+# ( program_transform_name = s/^/$(RPCPREFIX)$(KPREFIX)/ )
+# but that also renames the man pages, which the current
+# practice does not do.
+install-exec-hook:
+ (cd $(DESTDIR)$(sbindir) && \
+ for p in $(sbin_PROGRAMS); do \
+ mv -f $$p$(EXEEXT) $(RPCPREFIX)$(KPREFIX)$$p$(EXEEXT) ;\
+ done)
+uninstall-hook:
+ (cd $(DESTDIR)$(sbindir) && \
+ for p in $(sbin_PROGRAMS); do \
+ rm -f $(RPCPREFIX)$(KPREFIX)$$p$(EXEEXT) ;\
+ done)
+
+
+# XXX This makes some assumptions about what automake does.
+# XXX But there is no install-man-hook or install-man-local.
+install-man: install-man8 install-man-links
+uninstall-man: uninstall-man8 uninstall-man-links
+
+install-man-links:
+ (cd $(DESTDIR)$(man8dir) && \
+ for m in $(man8_MANS) $(dist_man8_MANS) $(nodist_man8_MANS); do \
+ inst=`echo $$m | sed -e 's/man$$/8/'`; \
+ rm -f $(RPCPREFIX)$$inst ; \
+ $(LN_S) $$inst $(RPCPREFIX)$$inst ; \
+ done)
+
+uninstall-man-links:
+ (cd $(DESTDIR)$(man8dir) && \
+ for m in $(man8_MANS) $(dist_man8_MANS) $(nodist_man8_MANS); do \
+ inst=`echo $$m | sed -e 's/man$$/8/'`; \
+ rm -f $(RPCPREFIX)$$inst ; \
+ done)
+
diff --git a/utils/blkmapd/atomicio.c b/utils/blkmapd/atomicio.c
new file mode 100644
index 0000000..3c3c864
--- /dev/null
+++ b/utils/blkmapd/atomicio.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2002 Marius Aamodt Eriksen <marius@xxxxxxxxxx>
+ * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+/*
+ * ensure all of data on socket comes through. f==read || f==write
+ */
+ssize_t atomicio(ssize_t(*f) (int, void *, size_t), int fd, void *_s, size_t n)
+{
+ char *s = _s;
+ ssize_t res, pos = 0;
+
+ while (n > pos) {
+ res = (f) (fd, s + pos, n - pos);
+ switch (res) {
+ case -1:
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ case 0:
+ if (pos != 0)
+ return pos;
+ return res;
+ default:
+ pos += res;
+ }
+ }
+ return pos;
+}
diff --git a/utils/blkmapd/cfg.c b/utils/blkmapd/cfg.c
new file mode 100644
index 0000000..b303352
--- /dev/null
+++ b/utils/blkmapd/cfg.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <linux/errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "device-discovery.h"
+#include "cfg.h"
+
+struct scan_root_list *scan_root_list_head;
+
+void bl_release_list(void)
+{
+ struct scan_root_list *root = scan_root_list_head;
+ struct scan_device_list *disk;
+
+ while (root) {
+ disk = root->disk;
+ while (disk) {
+ root->disk = disk->next;
+ /*free disk */
+ free(disk->name);
+ free(disk);
+ disk = root->disk;
+ }
+ scan_root_list_head = root->next;
+ /*free root */
+ free(root->name);
+ free(root);
+ root = scan_root_list_head;
+ }
+ return;
+}
+
+struct scan_root_list *bl_alloc_root_list(char *name, unsigned int len)
+{
+ struct scan_root_list *root;
+
+ root = malloc(sizeof(struct scan_root_list));
+ if (!root) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ return NULL;
+ }
+
+ root->name = malloc(len + 1);
+ if (!root->name) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ goto out;
+ }
+ strncpy(root->name, name, len);
+ root->name[len] = '\0';
+ root->next = scan_root_list_head;
+ root->all_disk = 0;
+ scan_root_list_head = root;
+
+ return root;
+ out:
+ if (root)
+ free(root);
+ return NULL;
+}
+
+void bl_alloc_device_list(struct scan_root_list *root, char *name,
+ unsigned int len)
+{
+ struct scan_device_list *device;
+
+ device = malloc(sizeof(struct scan_device_list));
+ if (!device) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ return;
+ }
+
+ device->name = malloc(len + 1);
+ if (!device->name) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ goto out;
+ }
+ strncpy(device->name, name, len);
+ device->name[len] = '\0';
+ device->next = root->disk;
+ root->disk = device;
+ return;
+ out:
+ if (device)
+ free(device);
+ return;
+}
+
+void bl_set_default_conf(void)
+{
+ struct scan_root_list *root;
+
+ bl_release_list();
+
+ root = bl_alloc_root_list("/dev", 4);
+ if (root)
+ bl_alloc_device_list(root, "sd", 2);
+
+ root = bl_alloc_root_list("/dev/mapper", 11);
+ if (root)
+ root->all_disk = 1;
+ return;
+}
+
+void bl_insert_device_list(struct scan_root_list *root, char *name,
+ unsigned int len)
+{
+ struct scan_device_list *device = root->disk;
+ /* Check whether this device has been inserted */
+ while (device) {
+ if (device->name && !strcmp(device->name, name))
+ return;
+ device = device->next;
+ }
+
+ bl_alloc_device_list(root, name, len);
+
+ return;
+}
+
+struct scan_root_list *bl_insert_root_list(char *name, unsigned int len)
+{
+ struct scan_root_list *root = scan_root_list_head;
+
+ /* Check whether this root has been inserted */
+ while (root) {
+ if (!strcmp(root->name, name))
+ return root;
+ root = root->next;
+ }
+
+ root = bl_alloc_root_list(name, len);
+ return root;
+}
+
+void bl_parse_line(char *line, size_t len, struct scan_root_list **bl_root)
+{
+ char *root;
+ char *device;
+ char *end;
+
+ if (*line == '#')
+ return;
+
+ root = line;
+ while (((*root == ' ') || (*root == '\t')) && (root < line + len))
+ root++;
+ if (root == line + len)
+ return;
+
+ end = line + len;
+ while (((*end == '\n') || (*end == ' ') || (*end == '\t') ||
+ (*end == '\0')) && (end > root)) {
+ end--;
+ }
+ /* For lines ended up with "/" or "/""*": add as a dir root */
+ if ((*end == '/') ||
+ ((*end == '*') && (end - root >= 1) && (*(end - 1) == '/'))) {
+ if (*end == '*')
+ end--;
+ *bl_root = bl_insert_root_list(root, end - root + 1);
+ if (*bl_root)
+ (*bl_root)->all_disk = 1;
+ return;
+ }
+
+ /* Other lines: add as a device */
+ device = end;
+ while ((*device != '/') && (device > root))
+ device--;
+ if (device == root)
+ return;
+ *bl_root = bl_insert_root_list(root, device - root + 1);
+ if (*end == '*')
+ end--;
+ if (*bl_root)
+ bl_insert_device_list(*bl_root, device + 1, end - device);
+
+ return;
+}
+
+void bl_parse_conf(char *buf, size_t size)
+{
+ char *tmp = buf, *line = buf, *end = buf + size;
+ struct scan_root_list *bl_root = NULL;
+
+ while (tmp < end) {
+ if (*tmp == '\n') {
+ *tmp = '\0';
+ bl_parse_line(line, tmp - line, &bl_root);
+ line = tmp + 1;
+ }
+ tmp++;
+ }
+
+ return;
+}
+
+int bl_cfg_init(void)
+{
+ struct stat sb;
+ size_t size;
+ int fd;
+ char *buf = NULL;
+ int ret = -ENOENT;
+
+ if (stat(bl_conf_path, &sb) == 0) {
+ ret = -EPERM;
+ size = sb.st_size;
+ if (!size)
+ goto err_out;
+
+ fd = open(bl_conf_path, O_RDONLY, 0);
+ if (fd == -1) {
+ BL_LOG_ERR("File %s open failed\n", bl_conf_path);
+ goto err_out;
+ }
+
+ buf = calloc(size, sizeof(char));
+ if (!buf) {
+ close(fd);
+ BL_LOG_ERR("%s: Out of memory\n", __func__);
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ if (atomicio(read, fd, buf, size) != size) {
+ close(fd);
+ BL_LOG_ERR("Read file %s failed\n", bl_conf_path);
+ goto err_out;
+ }
+
+ ret = 0;
+ close(fd);
+ bl_parse_conf(buf, size);
+ if (!scan_root_list_head)
+ ret = -EINVAL;
+ } else
+ bl_set_default_conf();
+ err_out:
+ if (buf)
+ free(buf);
+ return ret;
+}
diff --git a/utils/blkmapd/cfg.h b/utils/blkmapd/cfg.h
new file mode 100644
index 0000000..8d7bcf4
--- /dev/null
+++ b/utils/blkmapd/cfg.h
@@ -0,0 +1,48 @@
+/*
+ * bl-cfg.h
+ *
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef BL_CFG_H
+#define BL_CFG_H
+
+#define bl_conf_path "/etc/pnfs-block.conf"
+
+extern struct scan_root_list *scan_root_list_head;
+
+struct scan_device_list {
+ struct scan_device_list *next;
+ char *name;
+};
+
+struct scan_root_list {
+ struct scan_root_list *next;
+ unsigned int all_disk;
+ char *name;
+ struct scan_device_list *disk;
+};
+
+int bl_cfg_init(void);
+
+#endif
diff --git a/utils/blkmapd/device-discovery.c b/utils/blkmapd/device-discovery.c
new file mode 100644
index 0000000..79cb2b5
--- /dev/null
+++ b/utils/blkmapd/device-discovery.c
@@ -0,0 +1,542 @@
+/*
+ * device-discovery.c: main function, discovering device and processing
+ * pipe request from kernel.
+ *
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#define _LARGEFILE64_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <linux/kdev_t.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include <sys/select.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <libgen.h>
+#include <errno.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_ioctl.h>
+#include <scsi/sg.h>
+#include "device-discovery.h"
+#include "cfg.h"
+
+#define BL_PIPE_FILE "/var/lib/nfs/rpc_pipefs/bl_device_pipe"
+#define PID_FILE "/var/run/pnfs-block.pid"
+
+struct bl_disk *visible_disk_list;
+
+struct bl_disk_path *bl_get_path(const char *filepath,
+ struct bl_disk_path *paths)
+{
+ struct bl_disk_path *tmp = paths;
+ while (tmp) {
+ if (!strcmp(tmp->full_path, filepath))
+ break;
+ tmp = tmp->next;
+ }
+ return tmp;
+}
+
+/* Check whether valid_path is a substring(partition) of path */
+int bl_is_partition(struct bl_disk_path *valid_path, struct bl_disk_path *path)
+{
+ if (!strncmp(valid_path->full_path, path->full_path,
+ strlen(valid_path->full_path)))
+ return 1;
+
+ return 0;
+}
+
+/*
+ * For multipath devices, devices state could be PASSIVE/ACTIVE/PSEUDO,
+ * where PSEUDO > ACTIVE > PASSIVE. Device with highest state is used to
+ * create pseudo device. So if state is higher, the device path needs to
+ * be updated.
+ * If device-mapper multipath support is a must, pseudo devices should
+ * exist for each multipath device. If not, active device path will be
+ * chosen for device creation.
+ * Treat partition as invalid path.
+ */
+int bl_update_path(struct bl_disk_path *path, enum bl_path_state_e state,
+ struct bl_disk *disk)
+{
+ struct bl_disk_path *valid_path = disk->valid_path;
+
+ if (valid_path) {
+ if (valid_path->state >= state) {
+ if (bl_is_partition(valid_path, path))
+ return 0;
+ }
+ }
+ return 1;
+}
+
+void bl_release_disk(void)
+{
+ struct bl_disk *disk = visible_disk_list, *tmp;
+ struct bl_disk_path *path = NULL;
+
+ while (disk) {
+ path = disk->paths;
+ while (path) {
+ disk->paths = path->next;
+ free(path->full_path);
+ free(path);
+ path = disk->paths;
+ }
+ if (disk->serial)
+ free(disk->serial);
+ tmp = disk->next;
+ free(disk);
+ disk = tmp;
+ }
+
+ visible_disk_list = NULL;
+}
+
+void bl_add_disk(char *filepath)
+{
+ struct bl_disk *disk = NULL;
+ struct bl_disk *tmp = visible_disk_list;
+ int fd = 0;
+ struct stat sb;
+ off_t size = 0;
+ struct bl_serial *serial = NULL;
+ enum bl_path_state_e ap_state = BL_PATH_STATE_PASSIVE;
+ struct bl_disk_path *diskpath = NULL, *path = NULL;
+ dev_t dev;
+
+ fd = open(filepath, O_RDONLY | O_LARGEFILE);
+ if (fd < 0)
+ return;
+
+ if (fstat(fd, &sb)) {
+ close(fd);
+ return;
+ }
+
+ if (!sb.st_size)
+ ioctl(fd, BLKGETSIZE, &size);
+ else
+ size = sb.st_size;
+
+ if (!size) {
+ close(fd);
+ return;
+ }
+
+ dev = sb.st_rdev;
+
+ serial = bldev_read_serial(fd, filepath);
+ while (tmp) {
+ /*Already scanned or a partition?
+ *XXX: if released each time, maybe not need to compare
+ */
+ if ((serial->len == tmp->serial->len) &&
+ (memcmp(serial->data, tmp->serial->data, serial->len) ==
+ 0)) {
+ diskpath = bl_get_path(filepath, tmp->paths);
+ break;
+ }
+ tmp = tmp->next;
+ }
+
+ if (tmp && diskpath) {
+ close(fd);
+ return;
+ }
+
+ bldev_read_ap_state(fd, &ap_state);
+ close(fd);
+
+ /*
+ * Not sure how to identify a pseudo device created by
+ * device-mapper, so leave /dev/mapper for now.
+ */
+ if (strncmp(filepath, "/dev/mapper", 11) == 0)
+ ap_state = BL_PATH_STATE_PSEUDO;
+
+ /*add path */
+ path = malloc(sizeof(struct bl_disk_path));
+ if (!path) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ goto out_err;
+ }
+ path->next = NULL;
+ path->state = ap_state;
+ path->full_path = strdup(filepath);
+ if (!path->full_path)
+ goto out_err;
+
+ if (!tmp) { /*add disk */
+ disk = malloc(sizeof(struct bl_disk));
+ if (!disk) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ goto out_err;
+ }
+ disk->next = visible_disk_list;
+ disk->dev = dev;
+ disk->size = size;
+ disk->serial = serial;
+ disk->valid_path = path;
+ disk->paths = path;
+ visible_disk_list = disk;
+ } else {
+ path->next = tmp->paths;
+ tmp->paths = path;
+ /*check whether we need to update disk info */
+ if (bl_update_path(path, path->state, tmp)) {
+ tmp->dev = dev;
+ tmp->size = size;
+ tmp->valid_path = path;
+ }
+ }
+ return;
+
+ out_err:
+ if (path) {
+ if (path->full_path)
+ free(path->full_path);
+ free(path);
+ }
+ if (disk) {
+ if (disk->serial)
+ free(disk->serial);
+ free(disk);
+ }
+ return;
+}
+
+void bl_devicescan(const char *filename, struct scan_root_list *root)
+{
+ /*scan all disks */
+ char filepath[PATH_MAX];
+ struct scan_device_list *device;
+
+ if (!strcmp(filename, ".") || !strcmp(filename, ".."))
+ return;
+
+ memset(filepath, 0, PATH_MAX);
+ if (strlen(filename) < (PATH_MAX - strlen(root->name) - 2))
+ sprintf(filepath, "%s/%s", root->name, filename);
+ else
+ return;
+ if (root->all_disk)
+ goto valid;
+
+ device = root->disk;
+ while (device) {
+ /* If device->name is a subset of filename, this disk should be
+ * valid for scanning.
+ * For example, device->name is "sd", filename is "sda".
+ */
+ if (device->name
+ && !memcmp(filename, device->name, strlen(device->name)))
+ goto valid;
+ device = device->next;
+ }
+
+ return;
+
+ valid:
+ /*
+ * sg device is not a real device, but a device created according
+ * to each scsi device. It won't be used for pseudo device creation.
+ * I moved it here, so that sg devices will not be scanned.
+ */
+ if (!strncmp(filename, "/dev/sg", 7))
+ return;
+ bl_add_disk(filepath);
+ return;
+}
+
+/*
+ * Delete disks with multi-paths and no pseudo device path.
+ *
+ * If only passive device or more than one active devices available,
+ * I consider it as error since multipath of device-mapper should have worked
+ * and pseudo device should have been created.
+ */
+void bl_del_invalid_disk(void)
+{
+ struct bl_disk *disk = visible_disk_list, *pre;
+ struct bl_disk_path *path = NULL;
+
+ pre = disk;
+ while (disk) {
+ if ((disk->valid_path->state == BL_PATH_STATE_PASSIVE) ||
+ ((disk->valid_path->state == BL_PATH_STATE_ACTIVE) &&
+ (disk->paths->next))) {
+ path = disk->paths;
+ while (path) {
+ disk->paths = path->next;
+ free(path->full_path);
+ free(path);
+ path = disk->paths;
+ }
+ if (disk->serial)
+ free(disk->serial);
+ if (pre == visible_disk_list) {
+ visible_disk_list = disk->next;
+ free(disk);
+ disk = visible_disk_list;
+ } else {
+ pre->next = disk->next;
+ free(disk);
+ disk = pre->next;
+ }
+ } else {
+ pre = disk;
+ disk = disk->next;
+ }
+ }
+ return;
+}
+
+int bl_discover_devices(void)
+{
+ DIR *dir;
+ struct dirent *dp;
+ struct scan_root_list *root = scan_root_list_head;
+ /*release previous list */
+ bl_release_disk();
+ /*scan all disks */
+ while (root) {
+ dir = opendir(root->name);
+ if (dir == NULL) {
+ root = root->next;
+ continue;
+ }
+
+ while ((dp = readdir(dir)) != NULL)
+ bl_devicescan(dp->d_name, root);
+
+ root = root->next;
+ closedir(dir);
+ }
+
+#ifdef DEL_INVALID_DISKS
+ bl_del_invalid_disk();
+#endif
+
+ return 0;
+}
+
+/* process kernel request
+ * return 0: request processed, and no more request waiting;
+ * return 1: request processed, and more requests waiting;
+ * return < 0: error
+ */
+int bl_disk_inquiry_process(int fd)
+{
+ int ret = 0;
+ struct pipefs_hdr *head = NULL, *tmp;
+ char *buf = NULL;
+ uint32_t major, minor;
+ uint16_t buflen;
+ unsigned int len = 0;
+
+ head = calloc(1, sizeof(struct pipefs_hdr));
+ if (!head) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ return -ENOMEM;
+ }
+
+ /*read request */
+ if (atomicio(read, fd, head, sizeof(*head)) != sizeof(*head)) {
+ /* Note that an error in this or the next read is pretty
+ * catastrophic, as there is no good way to resync into
+ * the pipe's stream.
+ */
+ BL_LOG_ERR("Read pipefs head error!\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ buflen = head->totallen - sizeof(*head);
+ buf = malloc(buflen);
+ if (!buf) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (atomicio(read, fd, buf, buflen) != buflen) {
+ BL_LOG_ERR("Read pipefs content error!\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ head->status = BL_DEVICE_REQUEST_PROC;
+ switch (head->type) {
+ case BL_DEVICE_MOUNT:
+ if (!process_deviceinfo(buf, buflen, &major, &minor)) {
+ head->status = BL_DEVICE_REQUEST_ERR;
+ goto out;
+ }
+ tmp = realloc(head, sizeof(major) + sizeof(minor) +
+ sizeof(struct pipefs_hdr));
+ if (!tmp) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ head = tmp;
+ memcpy((void *)head + sizeof(struct pipefs_hdr),
+ &major, sizeof(major));
+ memcpy((void *)head + sizeof(struct pipefs_hdr) + sizeof(major),
+ &minor, sizeof(minor));
+ len = sizeof(major) + sizeof(minor);
+ break;
+ case BL_DEVICE_UMOUNT:
+ if (!dm_device_remove_all((uint64_t *) buf))
+ head->status = BL_DEVICE_REQUEST_ERR;
+ bl_discover_devices();
+ break;
+ default:
+ head->status = BL_DEVICE_REQUEST_ERR;
+ }
+
+ head->totallen = sizeof(struct pipefs_hdr) + len;
+ /* write to pipefs */
+ if (atomicio((void *)write, fd, head, head->totallen)
+ != head->totallen) {
+ BL_LOG_ERR("Write pipefs error!\n");
+ ret = -EIO;
+ }
+
+ out:
+ if (buf)
+ free(buf);
+ if (head)
+ free(head);
+ return ret;
+}
+
+/*TODO: set bl_process_stop to 1 in command*/
+unsigned int bl_process_stop;
+
+int bl_run_disk_inquiry_process(int fd)
+{
+ fd_set rset;
+ struct timeval tv;
+ int ret;
+
+ bl_process_stop = 0;
+
+ for (;;) {
+ if (bl_process_stop)
+ return 1;
+ FD_ZERO(&rset);
+ FD_SET(fd, &rset);
+ ret = 0;
+ tv.tv_sec = BL_DEVICE_DISCOVERY_INTERVAL;
+ switch (select(fd + 1, &rset, NULL, NULL, &tv)) {
+ case -1:
+ if (errno == EINTR)
+ continue;
+ else {
+ ret = -errno;
+ goto out;
+ }
+ case 0:
+ goto out;
+ default:
+ if (FD_ISSET(fd, &rset))
+ ret = bl_disk_inquiry_process(fd);
+ }
+ }
+ out:
+ return ret;
+}
+
+/* Daemon */
+int main(void)
+{
+ int fd, ret = 1;
+ struct stat statbuf;
+ char pidbuf[64];
+
+ if (!stat(PID_FILE, &statbuf)) {
+ fprintf(stderr, "Pid file already existed\n");
+ return -1;
+ }
+
+ if (daemon(0, 0) != 0) {
+ fprintf(stderr, "Daemonize failed\n");
+ return -1;
+ }
+
+ openlog("pnfs-block", LOG_PID, 0);
+ fd = open(PID_FILE, O_WRONLY | O_CREAT, 0644);
+ if (fd < 0) {
+ BL_LOG_ERR("Create pid file failed\n");
+ return -1;
+ }
+
+ if (lockf(fd, F_TLOCK, 0) < 0) {
+ BL_LOG_ERR("Lock pid file failed\n");
+ close(fd);
+ return -1;
+ }
+ ftruncate(fd, 0);
+ sprintf(pidbuf, "%d\n", getpid());
+ write(fd, pidbuf, strlen(pidbuf));
+
+ /*open pipe file */
+ fd = open(BL_PIPE_FILE, O_RDWR);
+ if (fd < 0) {
+ BL_LOG_ERR("open pipe file error\n");
+ return -1;
+ }
+
+ ret = bl_cfg_init();
+ if (ret < 0) {
+ if (ret == -ENOENT)
+ BL_LOG_WARNING("Config file not exist, use default\n");
+ else {
+ BL_LOG_ERR("Open/read Block pNFS config file error\n");
+ return -1;
+ }
+ }
+
+ while (1) {
+ /*discover device when needed */
+ bl_discover_devices();
+
+ ret = bl_run_disk_inquiry_process(fd);
+ if (ret < 0) {
+ /* what should we do with process error? */
+ BL_LOG_ERR("inquiry process return %d\n", ret);
+ }
+ }
+ close(fd);
+ return ret;
+}
diff --git a/utils/blkmapd/device-discovery.h b/utils/blkmapd/device-discovery.h
new file mode 100644
index 0000000..9f87ebe
--- /dev/null
+++ b/utils/blkmapd/device-discovery.h
@@ -0,0 +1,162 @@
+/*
+ * bl-device-discovery.h
+ *
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef BL_DEVICE_DISCOVERY_H
+#define BL_DEVICE_DISCOVERY_H
+
+#define BL_DEVICE_DISCOVERY_INTERVAL 60
+
+#include <stdint.h>
+#include <syslog.h>
+
+enum blk_vol_type {
+ BLOCK_VOLUME_SIMPLE = 0, /* maps to a single LU */
+ BLOCK_VOLUME_SLICE = 1, /* slice of another volume */
+ BLOCK_VOLUME_CONCAT = 2, /* concatenation of multiple volumes */
+ BLOCK_VOLUME_STRIPE = 3, /* striped across multiple volumes */
+ BLOCK_VOLUME_PSEUDO = 4,
+};
+
+/* All disk offset/lengths are stored in 512-byte sectors */
+struct bl_volume {
+ uint32_t bv_type;
+ off_t bv_size;
+ struct bl_volume **bv_vols;
+ int bv_vol_n;
+ union {
+ dev_t bv_dev; /*for BLOCK_VOLUME_SIMPLE(PSEUDO) */
+ off_t bv_stripe_unit; /*for BLOCK_VOLUME_STRIPE(CONCAT) */
+ off_t bv_offset; /*for BLOCK_VOLUME_SLICE */
+ } param;
+};
+
+struct bl_sig_comp {
+ int64_t bs_offset; /* In bytes */
+ uint32_t bs_length; /* In bytes */
+ char *bs_string;
+};
+
+/* Maximum number of signatures components in a simple volume */
+# define BLOCK_MAX_SIG_COMP 16
+
+struct bl_sig {
+ int si_num_comps;
+ struct bl_sig_comp si_comps[BLOCK_MAX_SIG_COMP];
+};
+
+/*
+ * Multipath support: ACTIVE or PSEUDO device is valid,
+ * PASSIVE is a standby for ACTIVE.
+ */
+enum bl_path_state_e {
+ BL_PATH_STATE_PASSIVE = 1,
+ BL_PATH_STATE_ACTIVE = 2,
+ BL_PATH_STATE_PSEUDO = 3,
+};
+
+struct bl_serial {
+ int len;
+ char *data;
+};
+
+struct bl_disk_path {
+ struct bl_disk_path *next;
+ char *full_path;
+ enum bl_path_state_e state;
+};
+
+struct bl_disk {
+ struct bl_disk *next;
+ struct bl_serial *serial;
+ dev_t dev;
+ off_t size;
+ struct bl_disk_path *valid_path;
+ struct bl_disk_path *paths;
+};
+
+struct bl_dev_id {
+ unsigned char type;
+ unsigned char ids;
+ unsigned char reserve;
+ unsigned char len;
+ char data[0];
+};
+
+struct pipefs_hdr {
+ uint32_t msgid;
+ uint8_t type;
+ uint8_t flags;
+ uint16_t totallen; /* length of entire message, including hdr */
+ uint32_t status;
+};
+
+#define BL_DEVICE_UMOUNT 0x0 /* Umount--delete devices */
+#define BL_DEVICE_MOUNT 0x1 /* Mount--create devices */
+#define BL_DEVICE_REQUEST_INIT 0x0 /* Start request */
+#define BL_DEVICE_REQUEST_PROC 0x1 /* User process succeeds */
+#define BL_DEVICE_REQUEST_ERR 0x2 /* User process fails */
+
+uint32_t *blk_overflow(uint32_t * p, uint32_t * end, size_t nbytes);
+
+#define BLK_READBUF(p, e, nbytes) do { \
+ p = blk_overflow(p, e, nbytes); \
+ if (!p) {\
+ goto out_err;\
+ } \
+} while (0)
+
+#define READ32(x) (x) = ntohl(*p++)
+
+#define READ64(x) do { \
+ (x) = (uint64_t)ntohl(*p++) << 32; \
+ (x) |= ntohl(*p++); \
+} while (0)
+
+#define READ_SECTOR(x) do { \
+ READ64(tmp); \
+ if (tmp & 0x1ff) { \
+ goto out_err; \
+ } \
+ (x) = tmp >> 9; \
+} while (0)
+
+extern struct bl_disk *visible_disk_list;
+uint64_t dm_device_create(struct bl_volume *vols, int num_vols);
+int dm_device_remove_all(uint64_t *dev);
+uint64_t process_deviceinfo(const char *dev_addr_buf,
+ unsigned int dev_addr_len,
+ uint32_t *major, uint32_t *minor);
+
+extern ssize_t atomicio(ssize_t(*f) (int, void *, size_t),
+ int fd, void *_s, size_t n);
+extern struct bl_serial *bldev_read_serial(int fd, const char *filename);
+extern void bldev_read_ap_state(int fd, enum bl_path_state_e *ap_state_out);
+extern int bl_discover_devices(void);
+
+#define BL_LOG_WARNING(fmt...) syslog(LOG_WARNING, fmt)
+#define BL_LOG_ERR(fmt...) syslog(LOG_ERR, fmt)
+#define BL_LOG_DEBUG(fmt...) syslog(LOG_DEBUG, fmt)
+#endif
diff --git a/utils/blkmapd/device-inq.c b/utils/blkmapd/device-inq.c
new file mode 100644
index 0000000..ff38fd6
--- /dev/null
+++ b/utils/blkmapd/device-inq.c
@@ -0,0 +1,235 @@
+/*
+ * device-inq.c: inquire SCSI device information.
+ *
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ * All rights reserved.
+ *
+ * This program refers to "SCSI Primary Commands - 3 (SPC-3)
+ * at http://www.t10.org and sg_inq.c in sg3_utils-1.26 for
+ * Linux OS SCSI subsystem, by D. Gilbert.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+#include <sys/select.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <libgen.h>
+#include <errno.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_ioctl.h>
+#include <scsi/sg.h>
+#include "device-discovery.h"
+
+#define DEF_ALLOC_LEN 255
+#define MX_ALLOC_LEN (0xc000 + 0x80)
+
+struct bl_serial *bl_create_scsi_string(int len, const char *bytes)
+{
+ struct bl_serial *s;
+ s = malloc(sizeof(*s) + len);
+ if (s) {
+ s->data = (char *)&s[1];
+ s->len = len;
+ memcpy(s->data, bytes, len);
+ }
+ return s;
+}
+
+void bl_free_scsi_string(struct bl_serial *str)
+{
+ if (str)
+ free(str);
+}
+
+#define sg_io_ok(io_hdr) \
+ ((((io_hdr).status & 0x7e) == 0) && \
+ ((io_hdr).host_status == 0) && \
+ (((io_hdr).driver_status & 0x0f) == 0))
+
+static int sg_timeout = 1 * 1000;
+
+static int bldev_inquire_page(int fd, int page, char *buffer, int len)
+{
+ unsigned char cmd[] = { INQUIRY, 0, 0, 0, 0, 0 };
+ unsigned char sense_b[28];
+ struct sg_io_hdr io_hdr;
+ if (page >= 0) {
+ cmd[1] = 1;
+ cmd[2] = page;
+ }
+ cmd[3] = (unsigned char)((len >> 8) & 0xff);
+ cmd[4] = (unsigned char)(len & 0xff);
+
+ memset(&io_hdr, 0, sizeof(struct sg_io_hdr));
+ io_hdr.interface_id = 'S';
+ io_hdr.cmd_len = sizeof(cmd);
+ io_hdr.mx_sb_len = sizeof(sense_b);
+ io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+ io_hdr.dxfer_len = len;
+ io_hdr.dxferp = buffer;
+ io_hdr.cmdp = cmd;
+ io_hdr.sbp = sense_b;
+ io_hdr.timeout = sg_timeout;
+ if (ioctl(fd, SG_IO, &io_hdr) < 0)
+ return -1;
+
+ if (sg_io_ok(io_hdr))
+ return 0;
+ return -1;
+}
+
+int bldev_inquire_pages(int fd, int page, char **buffer)
+{
+ int status = 0;
+ char *tmp;
+ int len;
+
+ *buffer = calloc(DEF_ALLOC_LEN, sizeof(char));
+ if (!*buffer) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ return -ENOMEM;
+ }
+
+ status = bldev_inquire_page(fd, page, *buffer, DEF_ALLOC_LEN);
+ if (status)
+ goto out;
+
+ status = -1;
+ if ((*(*buffer + 1) & 0xff) != page)
+ goto out;
+
+ len = (*(*buffer + 2) << 8) + *(*buffer + 3) + 4;
+ if (len > MX_ALLOC_LEN) {
+ BL_LOG_ERR("SCSI response length too long: %d\n", len);
+ goto out;
+ }
+ if (len > DEF_ALLOC_LEN) {
+ tmp = realloc(*buffer, len);
+ if (!tmp) {
+ BL_LOG_ERR("%s: Out of memory!\n", __func__);
+ status = -ENOMEM;
+ goto out;
+ }
+ *buffer = tmp;
+ status = bldev_inquire_page(fd, page, *buffer, len);
+ if (status)
+ goto out;
+ }
+ status = 0;
+ out:
+ return status;
+}
+
+/* For EMC multipath devices, use VPD page (0xc0) to get status.
+ * For other devices, return ACTIVE for now
+ */
+void bldev_read_ap_state(int fd, enum bl_path_state_e *ap_state_out)
+{
+ int status = 0;
+ char *buffer;
+
+ *ap_state_out = BL_PATH_STATE_ACTIVE;
+
+ status = bldev_inquire_pages(fd, 0xc0, &buffer);
+ if (status)
+ goto out;
+
+ if (buffer[4] < 0x02)
+ *ap_state_out = BL_PATH_STATE_PASSIVE;
+ out:
+ if (buffer)
+ free(buffer);
+ return;
+}
+
+struct bl_serial *bldev_read_serial(int fd, const char *filename)
+{
+ struct bl_serial *serial_out = NULL;
+ int status = 0, pos, len;
+ char *buffer;
+ struct bl_dev_id *dev_root, *dev_id;
+ unsigned int current_id = 0;
+
+ status = bldev_inquire_pages(fd, 0x83, &buffer);
+ if (status)
+ goto out;
+
+ dev_root = (struct bl_dev_id *)buffer;
+
+ pos = 0;
+ current_id = 0;
+ len = dev_root->len;
+ while (pos < (len - sizeof(struct bl_dev_id) + sizeof(unsigned char))) {
+ dev_id = (struct bl_dev_id *)&(dev_root->data[pos]);
+ if ((dev_id->ids & 0xf) < current_id)
+ continue;
+ switch (dev_id->ids & 0xf) {
+ /* We process SCSI ID with four ID cases: 0, 1, 2 and 3.
+ * When more than one ID is available, priority is
+ * 3>2>1>0.
+ */
+ case 2: /* EUI-64 based */
+ if ((dev_id->len != 8) && (dev_id->len != 12) &&
+ (dev_id->len != 16)) {
+ BL_LOG_ERR("EUI-64 only decodes 8, "
+ "12 and 16\n");
+ break;
+ }
+ case 3: /* NAA */
+ /* TODO: NAA validity judgement too complicated,
+ * so just ingore it here.
+ */
+ if ((dev_id->type & 0xf) != 1) {
+ BL_LOG_ERR("Binary code_set expected\n");
+ break;
+ }
+ case 0: /* vendor specific */
+ case 1: /* T10 vendor identification */
+ current_id = dev_id->ids & 0xf;
+ if (serial_out)
+ bl_free_scsi_string(serial_out);
+ serial_out = bl_create_scsi_string(dev_id->len,
+ dev_id->data);
+ break;
+ default:
+ break;
+ }
+ if (current_id == 3)
+ break;
+ pos += (dev_id->len + sizeof(struct bl_dev_id) -
+ sizeof(unsigned char));
+ }
+ out:
+ if (!serial_out)
+ serial_out = bl_create_scsi_string(strlen(filename), filename);
+ if (buffer)
+ free(buffer);
+ return serial_out;
+}
diff --git a/utils/blkmapd/device-process.c b/utils/blkmapd/device-process.c
new file mode 100644
index 0000000..6252552
--- /dev/null
+++ b/utils/blkmapd/device-process.c
@@ -0,0 +1,391 @@
+/*
+ * device-process.c: detailed processing of device information sent
+ * from kernel.
+ *
+ * Copyright (c) 2006 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Andy Adamson <andros@xxxxxxxxxxxxxx>
+ * Fred Isaman <iisaman@xxxxxxxxx>
+ *
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ *
+ * Used codes in linux/fs/nfs/blocklayout/blocklayoutdev.c.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#define _LARGEFILE64_SOURCE
+#include <libdevmapper.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/user.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <linux/kdev_t.h>
+#include "device-discovery.h"
+
+uint32_t *blk_overflow(uint32_t * p, uint32_t * end, size_t nbytes)
+{
+ uint32_t *q = p + ((nbytes + 3) >> 2);
+ if (q > end || q < p)
+ return NULL;
+ return p;
+}
+
+static int decode_blk_signature(uint32_t **pp, uint32_t *end,
+ struct bl_sig *sig)
+{
+ int i, tmp;
+ uint32_t *p = *pp;
+
+ BLK_READBUF(p, end, 4);
+ READ32(sig->si_num_comps);
+ if (sig->si_num_comps == 0) {
+ BL_LOG_ERR("0 components in sig\n");
+ goto out_err;
+ }
+ if (sig->si_num_comps >= BLOCK_MAX_SIG_COMP) {
+ BL_LOG_ERR("number of sig comps %i >= BLOCK_MAX_SIG_COMP\n",
+ sig->si_num_comps);
+ goto out_err;
+ }
+ for (i = 0; i < sig->si_num_comps; i++) {
+ BLK_READBUF(p, end, 12);
+ READ64(sig->si_comps[i].bs_offset);
+ READ32(tmp);
+ sig->si_comps[i].bs_length = tmp;
+ BLK_READBUF(p, end, tmp);
+ /* Note we rely here on fact that sig is used immediately
+ * for mapping, then thrown away.
+ */
+ sig->si_comps[i].bs_string = (char *)p;
+ BL_LOG_ERR("%s: si_comps[%d]: bs_length %d, bs_string %s\n",
+ __func__, i, sig->si_comps[i].bs_length,
+ sig->si_comps[i].bs_string);
+ p += ((tmp + 3) >> 2);
+ }
+ *pp = p;
+ return 0;
+ out_err:
+ return -EIO;
+}
+
+/* Read signature from device
+ * return 0: read successfully
+ * return -1: error
+ */
+int read_cmp_blk_sig(const char *dev_name, struct bl_sig_comp *comp,
+ int64_t bs_offset)
+{
+ int fd, ret = -1;
+ char *sig = NULL;
+
+ BL_LOG_ERR("%s: dev_name %s\n", __func__, dev_name);
+ fd = open(dev_name, O_RDONLY | O_LARGEFILE);
+ if (fd < 0) {
+ BL_LOG_ERR("%s could not be opened for read\n", dev_name);
+ goto error;
+ }
+
+ sig = (char *)malloc(comp->bs_length);
+ if (!sig) {
+ BL_LOG_ERR("%s: Out of memory\n", __func__);
+ goto error;
+ }
+
+ if (lseek64(fd, bs_offset, SEEK_SET) == -1) {
+ BL_LOG_ERR("File %s lseek error\n", dev_name);
+ goto error;
+ }
+
+ if (atomicio(read, fd, sig, comp->bs_length) != comp->bs_length) {
+ BL_LOG_ERR("File %s read error\n", dev_name);
+ goto error;
+ }
+
+ BL_LOG_ERR
+ ("%s: sig: %s, bs_string: %s, bs_length: %d, bs_offset: %lld\n",
+ __func__, sig, comp->bs_string, comp->bs_length, bs_offset);
+ ret = memcmp(sig, comp->bs_string, comp->bs_length);
+
+ error:
+ if (sig)
+ free(sig);
+ if (fd >= 0)
+ close(fd);
+ return ret;
+}
+
+/*
+ * All signatures in sig must be found on disk for verification.
+ * Returns True if sig matches, False otherwise.
+ */
+static int verify_sig(struct bl_disk *disk, struct bl_sig *sig)
+{
+ struct bl_sig_comp *comp;
+ int i, ret;
+ int64_t bs_offset;
+
+ for (i = 0; i < sig->si_num_comps; i++) {
+ comp = &sig->si_comps[i];
+ bs_offset = comp->bs_offset;
+ if (bs_offset < 0)
+ bs_offset += (((int64_t) disk->size) << 9);
+ BL_LOG_ERR("%s: bs_offset: %lld\n", __func__, bs_offset);
+ ret = read_cmp_blk_sig(disk->valid_path->full_path,
+ comp, bs_offset);
+ if (ret)
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * map_sig_to_device()
+ * Given a signature, walk the list of visible disks searching for
+ * a match. Returns True if mapping was done, False otherwise.
+ *
+ * While we're at it, fill in the vol->bv_size.
+ */
+static int map_sig_to_device(struct bl_sig *sig, struct bl_volume *vol)
+{
+ int mapped = 0;
+ struct bl_disk *disk = visible_disk_list;
+ char *filepath = 0;
+ struct bl_disk *lolDisk = disk;
+ while (lolDisk) {
+ BL_LOG_ERR("%s: visible_disk_list: %s\n", __func__,
+ lolDisk->valid_path->full_path);
+ lolDisk = lolDisk->next;
+ }
+
+ /*scan disk list to find out match device */
+ while (disk) {
+ /* FIXME: should we use better algorithm for disk scan? */
+ mapped = verify_sig(disk, sig);
+ if (mapped) {
+ vol->param.bv_dev = disk->dev;
+ filepath = disk->valid_path->full_path;
+ vol->bv_size = disk->size;
+ break;
+ }
+ disk = disk->next;
+ }
+ return mapped;
+}
+
+/* We are given an array of XDR encoded array indices, each of which should
+ * refer to a previously decoded device. Translate into a list of pointers
+ * to the appropriate pnfs_blk_volume's.
+ */
+static int set_vol_array(uint32_t **pp, uint32_t *end,
+ struct bl_volume *vols, int working)
+{
+ int i, index;
+ uint32_t *p = *pp;
+ struct bl_volume **array = vols[working].bv_vols;
+ for (i = 0; i < vols[working].bv_vol_n; i++) {
+ BLK_READBUF(p, end, 4);
+ READ32(index);
+ if ((index < 0) || (index >= working)) {
+ BL_LOG_ERR("set_vol_array: Id %i out of range\n",
+ index);
+ goto out_err;
+ }
+ array[i] = &vols[index];
+ }
+ *pp = p;
+ return 0;
+ out_err:
+ return -EIO;
+}
+
+static uint64_t sum_subvolume_sizes(struct bl_volume *vol)
+{
+ int i;
+ uint64_t sum = 0;
+ for (i = 0; i < vol->bv_vol_n; i++)
+ sum += vol->bv_vols[i]->bv_size;
+ return sum;
+}
+
+static int decode_blk_volume(uint32_t **pp, uint32_t *end,
+ struct bl_volume *vols, int i, int *array_cnt)
+{
+ int status = 0, j;
+ struct bl_sig sig;
+ uint32_t *p = *pp;
+ struct bl_volume *vol = &vols[i];
+ uint64_t tmp, tmp_size;
+ div_t d;
+
+ BLK_READBUF(p, end, 4);
+ READ32(vol->bv_type);
+ switch (vol->bv_type) {
+ case BLOCK_VOLUME_SIMPLE:
+ *array_cnt = 0;
+ status = decode_blk_signature(&p, end, &sig);
+ if (status)
+ return status;
+ status = map_sig_to_device(&sig, vol);
+ if (!status) {
+ BL_LOG_ERR("Could not find disk for device\n");
+ return -ENXIO;
+ }
+ status = 0;
+ break;
+ case BLOCK_VOLUME_SLICE:
+ BLK_READBUF(p, end, 16);
+ READ_SECTOR(vol->param.bv_offset);
+ READ_SECTOR(vol->bv_size);
+ *array_cnt = vol->bv_vol_n = 1;
+ status = set_vol_array(&p, end, vols, i);
+ break;
+ case BLOCK_VOLUME_STRIPE:
+ BLK_READBUF(p, end, 8);
+ READ_SECTOR(vol->param.bv_stripe_unit);
+ off_t chunksize = vol->param.bv_stripe_unit;
+ if ((chunksize == 0) ||
+ ((chunksize & (chunksize - 1)) != 0) ||
+ (chunksize < (PAGE_SIZE >> 9)))
+ return -EIO;
+ BLK_READBUF(p, end, 4);
+ READ32(vol->bv_vol_n);
+ if (!vol->bv_vol_n)
+ return -EIO;
+ *array_cnt = vol->bv_vol_n;
+ status = set_vol_array(&p, end, vols, i);
+ if (status)
+ return status;
+ for (j = 1; j < vol->bv_vol_n; j++) {
+ if (vol->bv_vols[j]->bv_size !=
+ vol->bv_vols[0]->bv_size) {
+ BL_LOG_ERR("varying subvol size\n");
+ return -EIO;
+ }
+ }
+ /* Make sure total size only includes addressable areas */
+ tmp_size = vol->bv_vols[0]->bv_size;
+ d = div(tmp_size, (uint32_t) vol->param.bv_stripe_unit);
+ tmp_size = d.quot;
+ vol->bv_size = tmp_size * vol->param.bv_stripe_unit;
+ break;
+ case BLOCK_VOLUME_CONCAT:
+ BLK_READBUF(p, end, 4);
+ READ32(vol->bv_vol_n);
+ if (!vol->bv_vol_n)
+ return -EIO;
+ *array_cnt = vol->bv_vol_n;
+ status = set_vol_array(&p, end, vols, i);
+ if (status)
+ return status;
+ vol->bv_size = sum_subvolume_sizes(vol);
+ break;
+ default:
+ BL_LOG_ERR("Unknown volume type %i\n", vol->bv_type);
+ out_err:
+ return -EIO;
+ }
+ *pp = p;
+ return status;
+}
+
+uint64_t process_deviceinfo(const char *dev_addr_buf,
+ unsigned int dev_addr_len,
+ uint32_t *major, uint32_t *minor)
+{
+ int num_vols, i, status, count;
+ uint32_t *p, *end;
+ struct bl_volume *vols = NULL, **arrays = NULL, **arrays_ptr = NULL;
+ uint64_t dev = 0;
+ int tried = 0;
+
+ restart:
+ p = (uint32_t *) dev_addr_buf;
+ end = (uint32_t *) ((char *)p + dev_addr_len);
+ /* Decode block volume */
+ BLK_READBUF(p, end, 4);
+ READ32(num_vols);
+ if (num_vols <= 0) {
+ BL_LOG_WARNING("Error: number of vols: %d\n", num_vols);
+ goto out_err;
+ }
+
+ vols = (struct bl_volume *)malloc(num_vols * sizeof(struct bl_volume));
+ if (!vols) {
+ BL_LOG_ERR("%s: Out of memory\n", __func__);
+ goto out_err;
+ }
+
+ /* Each volume in vols array needs its own array. Save time by
+ * allocating them all in one large hunk. Because each volume
+ * array can only reference previous volumes, and because once
+ * a concat or stripe references a volume, it may never be
+ * referenced again, the volume arrays are guaranteed to fit
+ * in the suprisingly small space allocated.
+ */
+ arrays =
+ (struct bl_volume **)malloc(num_vols * 2 *
+ sizeof(struct bl_volume *));
+ if (!arrays) {
+ BL_LOG_ERR("%s: Out of memory\n", __func__);
+ goto out_err;
+ }
+
+ arrays_ptr = arrays;
+
+ for (i = 0; i < num_vols; i++) {
+ vols[i].bv_vols = arrays_ptr;
+ status = decode_blk_volume(&p, end, vols, i, &count);
+ if (status == -ENXIO && (tried <= 5)) {
+ sleep(1);
+ BL_LOG_DEBUG("%s: discover again!\n", __func__);
+ bl_discover_devices();
+ tried++;
+ free(vols);
+ free(arrays);
+ goto restart;
+ }
+ if (status)
+ goto out_err;
+ arrays_ptr += count;
+ }
+
+ if (p != end) {
+ BL_LOG_ERR("p is not equal to end!\n");
+ goto out_err;
+ }
+
+ dev = dm_device_create(vols, num_vols);
+ *major = MAJOR(dev);
+ *minor = MINOR(dev);
+ out_err:
+ if (vols)
+ free(vols);
+ if (arrays)
+ free(arrays);
+ return dev;
+}
diff --git a/utils/blkmapd/dm-device.c b/utils/blkmapd/dm-device.c
new file mode 100644
index 0000000..f08df7b
--- /dev/null
+++ b/utils/blkmapd/dm-device.c
@@ -0,0 +1,509 @@
+/*
+ * dm-device.c: create or remove device via device mapper API.
+ *
+ * Copyright (c) 2010 EMC Corporation, Haiying Tang <Tang_Haiying@xxxxxxx>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <libdevmapper.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <linux/kdev_t.h>
+#include "device-discovery.h"
+
+#define DM_DEV_NAME_LEN 256
+
+#ifndef DM_MAX_TYPE_NAME
+#define DM_MAX_TYPE_NAME 16
+#endif
+
+#define DM_PARAMS_LEN 512 /*XXX: is this enough for target? */
+#define DM_DIR "/dev/mapper"
+#define DM_DIR_LEN12
+#define TYPE_HAS_DEV(type) ((type == BLOCK_VOLUME_SIMPLE) || \
+ (type == BLOCK_VOLUME_PSEUDO))
+
+struct bl_dm_table {
+ uint64_t offset;
+ uint64_t size;
+ char target_type[DM_MAX_TYPE_NAME];
+ char params[DM_PARAMS_LEN];
+ struct bl_dm_table *next;
+};
+
+struct bl_dm_tree {
+ uint64_t dev;
+ struct dm_tree *tree;
+ struct bl_dm_tree *next;
+};
+
+static inline struct bl_dm_table *bl_dm_table_alloc(void)
+{
+ return (struct bl_dm_table *)calloc(1, sizeof(struct bl_dm_table));
+}
+
+void bl_dm_table_free(struct bl_dm_table *bl_table_head)
+{
+ struct bl_dm_table *p = bl_table_head;
+ while (bl_table_head) {
+ p = bl_table_head->next;
+ free(bl_table_head);
+ bl_table_head = p;
+ }
+}
+
+void add_to_bl_dm_table(struct bl_dm_table **bl_table_head,
+ struct bl_dm_table *table)
+{
+ struct bl_dm_table *pre;
+ if (!*bl_table_head) {
+ *bl_table_head = table;
+ return;
+ }
+ pre = *bl_table_head;
+ while (pre->next)
+ pre = pre->next;
+ pre->next = table;
+ return;
+}
+
+struct bl_dm_tree *bl_tree_head;
+
+struct bl_dm_tree *find_bl_dm_tree(uint64_t dev)
+{
+ struct bl_dm_tree *p = bl_tree_head;
+ while (p) {
+ if (p->dev == dev)
+ return p;
+ p = p->next;
+ }
+ return NULL;
+}
+
+void del_from_bl_dm_tree(uint64_t dev)
+{
+ struct bl_dm_tree *pre = bl_tree_head;
+ struct bl_dm_tree *p;
+
+ p = pre;
+ while (p) {
+ if (p->dev == dev) {
+ pre->next = p->next;
+ if (p == bl_tree_head)
+ bl_tree_head = bl_tree_head->next;
+ free(p);
+ break;
+ }
+ pre = p;
+ p = pre->next;
+ }
+}
+
+void add_to_bl_dm_tree(struct bl_dm_tree *tree)
+{
+ struct bl_dm_tree *pre;
+ if (!bl_tree_head) {
+ bl_tree_head = tree;
+ return;
+ }
+ pre = bl_tree_head;
+ while (pre->next)
+ pre = pre->next;
+ pre->next = tree;
+ return;
+}
+
+/* Create device via device mapper
+ * return 0 when creation failed
+ * return dev no for created device
+ */
+uint64_t dm_single_device_create(const char *dev_name, struct bl_dm_table * p)
+{
+ struct dm_task *dmt;
+ struct dm_info dminfo;
+ int ret = 0;
+
+ dmt = dm_task_create(DM_DEVICE_CREATE);
+ if (!dmt) {
+ BL_LOG_ERR("Create dm_task for %s failed\n", dev_name);
+ return 0;
+ }
+ ret = dm_task_set_name(dmt, dev_name);
+ if (!ret)
+ goto err_out;
+
+ while (p) {
+ ret = dm_task_add_target(dmt, p->offset, p->size,
+ p->target_type, p->params);
+ if (!ret)
+ goto err_out;
+ p = p->next;
+ }
+
+ ret = dm_task_run(dmt) &&
+ dm_task_get_info(dmt, &dminfo) && dminfo.exists;
+
+ if (!ret)
+ goto err_out;
+
+ dm_task_update_nodes();
+
+ err_out:
+ dm_task_destroy(dmt);
+
+ if (!ret) {
+ BL_LOG_ERR("Create device %s failed\n", dev_name);
+ return 0;
+ }
+ return MKDEV(dminfo.major, dminfo.minor);
+}
+
+int dm_device_remove_byname(const char *dev_name)
+{
+ struct dm_task *dmt;
+ int ret = 0;
+
+ dmt = dm_task_create(DM_DEVICE_REMOVE);
+ if (!dmt)
+ return -ENODEV;
+
+ ret = dm_task_set_name(dmt, dev_name) && dm_task_run(dmt);
+
+ dm_task_update_nodes();
+
+ if (dmt)
+ dm_task_destroy(dmt);
+
+ return ret;
+}
+
+int dm_device_remove(uint64_t dev)
+{
+ struct dm_task *dmt;
+ struct dm_names *dmnames;
+ char *names = NULL;
+ int ret = -1;
+
+ /* Look for dev_name via dev, if dev_name could be transferred here,
+ we could jump to DM_DEVICE_REMOVE directly */
+ dmt = dm_task_create(DM_DEVICE_LIST);
+ if (!dmt) {
+ BL_LOG_ERR("dm_task creation failed\n");
+ return -ENODEV;
+ }
+
+ ret = dm_task_run(dmt);
+ if (!ret) {
+ BL_LOG_ERR("dm_task_run failed\n");
+ goto error;
+ }
+
+ dmnames = dm_task_get_names(dmt);
+ if (!dmnames || !dmnames->dev) {
+ BL_LOG_ERR("dm_task_get_names failed\n");
+ goto error;
+ }
+
+ do {
+ if (dmnames->dev == dev) {
+ names = dmnames->name;
+ break;
+ }
+ dmnames = (void *)dmnames + dmnames->next;
+ } while (dmnames);
+
+ if (!names) {
+ BL_LOG_ERR("Could not find device\n");
+ goto error;
+ }
+
+ dm_task_update_nodes();
+
+ error:
+ dm_task_destroy(dmt);
+
+ /*Start to remove device */
+ if (names)
+ ret = dm_device_remove_byname(names);
+ return ret;
+}
+
+static unsigned long dev_count;
+
+void dm_devicelist_remove(unsigned long start, unsigned long end)
+{
+ char dev_name[DM_DEV_NAME_LEN];
+ unsigned long count;
+
+ if ((start >= dev_count) || (end <= 1) || (start >= end - 1))
+ return;
+
+ for (count = end - 1; count > start; count--) {
+ sprintf(dev_name, "pnfs_vol_%lu", count - 1);
+ dm_device_remove_byname(dev_name);
+ }
+
+ return;
+}
+
+void bl_dm_remove_tree(uint64_t dev)
+{
+ struct bl_dm_tree *p;
+
+ p = find_bl_dm_tree(dev);
+ if (!p)
+ return;
+
+ dm_tree_free(p->tree);
+ del_from_bl_dm_tree(dev);
+}
+
+void bl_dm_create_tree(uint64_t dev)
+{
+ struct dm_tree *tree;
+ struct bl_dm_tree *bl_tree;
+
+ bl_tree = find_bl_dm_tree(dev);
+ if (bl_tree)
+ return; /*XXX: error? */
+
+ tree = dm_tree_create();
+ if (!tree)
+ return;
+
+ if (!dm_tree_add_dev(tree, MAJOR(dev), MINOR(dev))) {
+ dm_tree_free(tree);
+ return;
+ }
+
+ bl_tree = malloc(sizeof(struct bl_dm_tree));
+ if (!bl_tree) {
+ dm_tree_free(tree);
+ return;
+ }
+
+ bl_tree->dev = dev;
+ bl_tree->tree = tree;
+ bl_tree->next = NULL;
+ add_to_bl_dm_tree(bl_tree);
+
+ return;
+}
+
+uint64_t dm_device_nametodev(char *dev_name)
+{
+ struct dm_task *dmt;
+ int ret = 0;
+ struct dm_info dminfo;
+
+ dmt = dm_task_create(DM_DEVICE_INFO);
+ if (!dmt)
+ return -ENODEV;
+
+ ret = dm_task_set_name(dmt, dev_name) &&
+ dm_task_run(dmt) && dm_task_get_info(dmt, &dminfo);
+
+ if (dmt)
+ dm_task_destroy(dmt);
+
+ if (!ret)
+ return 0;
+
+ return MKDEV(dminfo.major, dminfo.minor);
+}
+
+int dm_device_remove_all(uint64_t *dev)
+{
+ struct bl_dm_tree *p;
+ struct dm_tree_node *node;
+ const char *uuid;
+ int ret = 0;
+ uint32_t major, minor;
+ uint64_t bl_dev;
+
+ memcpy(&major, dev, sizeof(uint32_t));
+ memcpy(&minor, (void *)dev + sizeof(uint32_t), sizeof(uint32_t));
+ bl_dev = MKDEV(major, minor);
+ p = find_bl_dm_tree(bl_dev);
+ if (!p)
+ return ret;
+
+ node = dm_tree_find_node(p->tree, MAJOR(bl_dev), MINOR(bl_dev));
+ if (!node)
+ return ret;
+
+ uuid = dm_tree_node_get_uuid(node);
+ if (!uuid)
+ return ret;
+
+ dm_device_remove(bl_dev);
+ ret = dm_tree_deactivate_children(node, uuid, strlen(uuid));
+ dm_task_update_nodes();
+ bl_dm_remove_tree(bl_dev);
+ return ret;
+}
+
+/* TODO: check the value for DM_DEV_NAME_LEN, DM_TYPE_LEN, DM_PARAMS_LEN */
+uint64_t dm_device_create(struct bl_volume *vols, int num_vols)
+{
+ uint64_t size, dev = 0;
+ unsigned long count = dev_count;
+ int number = 0, i, pos;
+ struct bl_volume *node;
+ char *tmp;
+ struct bl_dm_table *table = NULL;
+ struct bl_dm_table *bl_table_head = NULL;
+ unsigned int len;
+ char *dev_name = NULL;
+ /* Create pseudo device here */
+ while (number < num_vols) {
+ node = &vols[number];
+ switch (node->bv_type) {
+ case BLOCK_VOLUME_SIMPLE:
+ /* Do not need to create device here */
+ dev = node->param.bv_dev;
+ goto continued;
+ case BLOCK_VOLUME_SLICE:
+ table = bl_dm_table_alloc();
+ if (!table)
+ goto out;
+ table->offset = 0;
+ table->size = node->bv_size;
+ strcpy(table->target_type, "linear");
+ if (!TYPE_HAS_DEV(node->bv_vols[0]->bv_type)) {
+ free(table);
+ goto out;
+ }
+ dev = node->bv_vols[0]->param.bv_dev;
+ tmp = table->params;
+ if (!dm_format_dev(tmp, DM_PARAMS_LEN,
+ MAJOR(dev), MINOR(dev))) {
+ free(table);
+ goto out;
+ }
+ tmp += strlen(tmp);
+ sprintf(tmp, " %lu", node->param.bv_offset);
+ add_to_bl_dm_table(&bl_table_head, table);
+ break;
+ case BLOCK_VOLUME_STRIPE:
+ table = bl_dm_table_alloc();
+ if (!table)
+ goto out;
+ table->offset = 0;
+ table->size = node->bv_size;
+ strcpy(table->target_type, "striped");
+ sprintf(table->params, "%d %lu %n", node->bv_vol_n,
+ node->param.bv_stripe_unit, &pos);
+ /* Repeatedly copy subdev to params */
+ tmp = table->params + pos;
+ len = DM_PARAMS_LEN - pos;
+ for (i = 0; i < node->bv_vol_n; i++) {
+ if (!TYPE_HAS_DEV(node->bv_vols[i]->bv_type)) {
+ free(table);
+ goto out;
+ }
+ dev = node->bv_vols[i]->param.bv_dev;
+ if (!dm_format_dev(tmp, len, MAJOR(dev),
+ MINOR(dev))) {
+ free(table);
+ goto out;
+ }
+ pos = strlen(tmp);
+ tmp += pos;
+ len -= pos;
+ sprintf(tmp, " %d ", 0);
+ tmp += 3;
+ len -= 3;
+ }
+ add_to_bl_dm_table(&bl_table_head, table);
+ break;
+ case BLOCK_VOLUME_CONCAT:
+ size = 0;
+ for (i = 0; i < node->bv_vol_n; i++) {
+ table = bl_dm_table_alloc();
+ if (!table)
+ goto out;
+ table->offset = size;
+ table->size = node->bv_vols[i]->bv_size;
+ if (!TYPE_HAS_DEV(node->bv_vols[i]->bv_type)) {
+ free(table);
+ goto out;
+ }
+ strcpy(table->target_type, "linear");
+ tmp = table->params;
+ dev = node->bv_vols[i]->param.bv_dev;
+ if (!dm_format_dev(tmp, DM_PARAMS_LEN,
+ MAJOR(dev), MINOR(dev))) {
+ free(table);
+ goto out;
+ }
+ tmp += strlen(tmp);
+ sprintf(tmp, " %d", 0);
+ size += table->size;
+ add_to_bl_dm_table(&bl_table_head, table);
+ }
+ break;
+ default:
+ /* Delete previous temporary devices */
+ dm_devicelist_remove(count, dev_count);
+ goto out;
+ } /*end of swtich */
+ /* Create dev_name here. Name of device is pnfs_vol_XXX */
+ if (dev_name)
+ free(dev_name);
+ dev_name = (char *)calloc(DM_DEV_NAME_LEN, sizeof(char));
+ if (!dev_name) {
+ BL_LOG_ERR("%s: Out of memory\n", __func__);
+ goto out;
+ }
+ sprintf(dev_name, "pnfs_vol_%lu", dev_count++);
+
+ dev = dm_single_device_create(dev_name, bl_table_head);
+ if (!dev) {
+ /* Delete previous temporary devices */
+ dm_devicelist_remove(count, dev_count);
+ goto out;
+ }
+ node->param.bv_dev = dev;
+ /*TODO: extend use with PSEUDO later */
+ node->bv_type = BLOCK_VOLUME_PSEUDO;
+ continued:
+ number++;
+ if (bl_table_head)
+ bl_dm_table_free(bl_table_head);
+ bl_table_head = NULL;
+ }
+ out:
+ if (bl_table_head)
+ bl_dm_table_free(bl_table_head);
+ bl_table_head = NULL;
+ if (dev)
+ bl_dm_create_tree(dev);
+ if (dev_name)
+ free(dev_name);
+ return dev;
+}
diff --git a/utils/blkmapd/etc/initd/initd.redhat b/utils/blkmapd/etc/initd/initd.redhat
new file mode 100644
index 0000000..a52250c
--- /dev/null
+++ b/utils/blkmapd/etc/initd/initd.redhat
@@ -0,0 +1,76 @@
+#!/bin/sh
+#
+# description: Starts and stops the iSCSI initiator
+#
+# processname: pnfsi-block
+# pidfile: /var/run/pnfs-block.pid
+# config: /etc/pnfs-block.conf
+
+# Source function library.
+if [ -f /etc/init.d/functions ] ; then
+ . /etc/init.d/functions
+elif [ -f /etc/rc.d/init.d/functions ] ; then
+ . /etc/rc.d/init.d/functions
+else
+ exit 0
+fi
+
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
+
+RETVAL=0
+
+start()
+{
+ echo -n $"Starting pNFS block-layout device discovery service: "
+ modprobe -q blocklayoutdriver
+ daemon /usr/sbin/bl-device
+ RETVAL=$?
+ if [ $RETVAL -eq 0 ]; then
+ touch /var/lock/subsys/pnfs-block
+ fi
+ echo
+ return $RETVAL
+}
+
+stop()
+{
+ echo -n $"Stopping pNFS block-layout device discovery service: "
+ killproc bl-device 2> /dev/null
+ rm -f /var/run/pnfs-block.pid
+ RETVAL=$?
+ [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/pnfs-block
+ if [ $RETVAL -eq 0 ]; then
+ echo_success
+ else
+ echo_failure
+ fi
+ echo
+ return $RETVAL
+}
+
+restart()
+{
+ stop
+ start
+}
+
+case "$1" in
+ start)
+ start
+ ;;
+ stop)
+ stop
+ ;;
+ restart)
+ stop
+ start
+ ;;
+ status)
+ status pnfs-block
+ ;;
+ *)
+ echo $"Usage: $0 {start|stop|restart|status}"
+ exit 1
+esac
+
+exit $RETVAL
diff --git a/utils/blkmapd/etc/pnfs-block.conf b/utils/blkmapd/etc/pnfs-block.conf
new file mode 100644
index 0000000..da70d94
--- /dev/null
+++ b/utils/blkmapd/etc/pnfs-block.conf
@@ -0,0 +1,10 @@
+# This is an example config file
+
+# Look at all /dev/sd* devices
+# /dev/sd or /dev/sd*
+/dev/sd*
+
+# Look at all /dev/mapper/* devices
+# /dev/mapper/* or
+# /dev/mapper/
+/dev/mapper/*
--
1.7.0.4
--
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