On 2010-08-12 16:42, Benny Halevy wrote:
> Thanks! merged.
That's in git://linux-nfs.org/~bhalevy/pnfs-nfs-utils.git master
>
> Benny
>
> On Aug. 11, 2010, 22:42 +0300, Jim Rees <rees@xxxxxxxxx> wrote:
>> This is a replacement for the patch I sent 21 July, incorporating feedback
>> from list members. Thank you for your comments.
>>
>> I have tried to settle on "blkmapd" as the name and use it consistently for
>> the executable, service name, syslog, etc.
>>
>> I did not change atomicio.c. That's because this is a copy of the file by
>> the same name in both idmapd and spnfsd. There is a patch in the works to
>> move this to the support library. I think the right thing to do is move
>> that patch forward, then fix atomicio.
>>
>> Signed-off-by: Jim Rees <rees@xxxxxxxxx>
>> ---
>> configure.ac | 4 +
>> utils/Makefile.am | 4 +
>> utils/blkmapd/Makefile.am | 63 +++++
>> utils/blkmapd/atomicio.c | 54 ++++
>> utils/blkmapd/cfg.c | 248 +++++++++++++++++
>> utils/blkmapd/cfg.h | 47 +++
>> utils/blkmapd/device-discovery.c | 502 +++++++++++++++++++++++++++++++++
>> utils/blkmapd/device-discovery.h | 162 +++++++++++
>> utils/blkmapd/device-inq.c | 235 ++++++++++++++++
>> utils/blkmapd/device-process.c | 394 ++++++++++++++++++++++++++
>> utils/blkmapd/dm-device.c | 509 ++++++++++++++++++++++++++++++++++
>> utils/blkmapd/etc/blkmapd.conf | 10 +
>> utils/blkmapd/etc/initd/initd.redhat | 76 +++++
>> 13 files changed, 2308 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/blkmapd.conf
>> create mode 100644 utils/blkmapd/etc/initd/initd.redhat
>>
>> 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..81cc420
>> --- /dev/null
>> +++ b/utils/blkmapd/Makefile.am
>> @@ -0,0 +1,63 @@
>> +## Process this file with automake to produce Makefile.in
>> +
>> +#man8_MANS = blkmapd.man
>> +
>> +AM_CFLAGS += -D_LARGEFILE64_SOURCE
>> +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..8db626e
>> --- /dev/null
>> +++ b/utils/blkmapd/atomicio.c
>> @@ -0,0 +1,54 @@
>> +/*
>> + * 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>
>> +
>> +/*
>> + * 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..dab9d0f
>> --- /dev/null
>> +++ b/utils/blkmapd/cfg.c
>> @@ -0,0 +1,248 @@
>> +/*
>> + * 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 <sys/param.h>
>> +#include <sys/stat.h>
>> +#include <linux/errno.h>
>> +#include <stdio.h>
>> +#include <stdlib.h>
>> +#include <unistd.h>
>> +#include <string.h>
>> +#include <fcntl.h>
>> +#include <ctype.h>
>> +
>> +#include "device-discovery.h"
>> +#include "cfg.h"
>> +
>> +char *conf_path = "/etc/blkmapd.conf";
>> +
>> +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->name);
>> + free(disk);
>> + disk = root->disk;
>> + }
>> + scan_root_list_head = root->next;
>> + free(root->name);
>> + free(root);
>> + root = scan_root_list_head;
>> + }
>> +}
>> +
>> +struct scan_root_list *bl_alloc_root_list(char *name, int all_disk)
>> +{
>> + struct scan_root_list *root;
>> +
>> + root = malloc(sizeof(struct scan_root_list));
>> + if (!root)
>> + goto nomem;
>> +
>> + root->name = strdup(name);
>> + if (!root->name)
>> + goto nomem;
>> + root->next = scan_root_list_head;
>> + root->all_disk = all_disk;
>> + scan_root_list_head = root;
>> + return root;
>> +
>> + nomem:
>> + BL_LOG_ERR("%s: Out of memory!\n", __func__);
>> + if (root)
>> + free(root);
>> + return NULL;
>> +}
>> +
>> +struct scan_device_list *bl_alloc_device_list(struct scan_root_list *root,
>> + char *name)
>> +{
>> + struct scan_device_list *device;
>> +
>> + device = malloc(sizeof(struct scan_device_list));
>> + if (!device)
>> + goto nomem;
>> +
>> + device->name = strdup(name);
>> + if (!device->name)
>> + goto nomem;
>> + device->next = root->disk;
>> + root->disk = device;
>> + return device;
>> +
>> + nomem:
>> + BL_LOG_ERR("%s: Out of memory!\n", __func__);
>> + if (device)
>> + free(device);
>> + return NULL;
>> +}
>> +
>> +struct scan_device_list *bl_insert_device_list(struct scan_root_list *root,
>> + char *name)
>> +{
>> + 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 = device->next;
>> + }
>> +
>> + return bl_alloc_device_list(root, name);
>> +}
>> +
>> +struct scan_root_list *bl_insert_root_list(char *name, int all_disk)
>> +{
>> + struct scan_root_list *root = scan_root_list_head;
>> +
>> + /* Check whether this root has been inserted */
>> + while (root) {
>> + if (root->name && !strcmp(root->name, name))
>> + return root;
>> + root = root->next;
>> + }
>> +
>> + return bl_alloc_root_list(name, all_disk);
>> +}
>> +
>> +int bl_parse_line(char *line, struct scan_root_list **bl_root)
>> +{
>> + char *root, *device, *end;
>> +
>> + root = strdup(line);
>> + end = root + strlen(line);
>> +
>> + /* Skip comments */
>> + if (*root == '#')
>> + return 0;
>> +
>> + /* Trim leading space */
>> + while (*root != '\0' && isspace(*root))
>> + root++;
>> + if (*root == '\0')
>> + return 0;
>> +
>> + /* Trim trailing space and set "end" to last char */
>> + while ((isspace(*end) || (*end == '\0')) && (end > root))
>> + end--;
>> +
>> + /* For lines ending with '/' or '/','*': add as a dir root */
>> + if ((*end == '/') ||
>> + ((*end == '*') && (end - root >= 1) && (*(end - 1) == '/'))) {
>> + if (*end == '*')
>> + end--;
>> + if (*end == '/')
>> + end--;
>> + *(end + 1) = '\0';
>> + *bl_root = bl_insert_root_list(root, 1);
>> + return 0;
>> + }
>> +
>> + /* Other lines: add as a device */
>> + device = end;
>> + while ((*device != '/') && (device > root))
>> + device--;
>> + if (device == root) {
>> + BL_LOG_ERR("%s: invalid config line\n", __func__);
>> + return -1;
>> + }
>> + *device = '\0';
>> + *bl_root = bl_insert_root_list(root, 0);
>> + if (*bl_root == NULL)
>> + return -ENOMEM;
>> + if (*end == '*')
>> + end--;
>> + *(end + 1) = '\0';
>> + if (bl_insert_device_list(*bl_root, device + 1) == NULL)
>> + return -ENOMEM;
>> +
>> + return 0;
>> +}
>> +
>> +int bl_set_default_conf(void)
>> +{
>> + struct scan_root_list *root = NULL;
>> + int rv;
>> +
>> + bl_release_list();
>> + rv = bl_parse_line("/dev/sd*", &root);
>> + if (rv < 0)
>> + return rv;
>> + rv = bl_parse_line("/dev/mapper/", &root);
>> + return rv;
>> +}
>> +
>> +int bl_parse_conf(char *buf)
>> +{
>> + char *tmp = buf, *line = buf, *end = buf + strlen(buf);
>> + struct scan_root_list *bl_root = NULL;
>> + int rv;
>> +
>> + while (tmp < end) {
>> + if (*tmp == '\n') {
>> + *tmp = '\0';
>> + rv = bl_parse_line(line, &bl_root);
>> + if (rv < 0)
>> + return rv;
>> + line = tmp + 1;
>> + }
>> + tmp++;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +int bl_cfg_init(void)
>> +{
>> + struct scan_root_list *root = NULL;
>> + FILE *f = NULL;
>> + char buf[PATH_MAX];
>> + int rv = 0;
>> +
>> + f = fopen(conf_path, "r");
>> + if (f == NULL)
>> + rv = bl_set_default_conf();
>> + else {
>> + while (fgets(buf, sizeof buf, f) != NULL) {
>> + rv = bl_parse_line(buf, &root);
>> + if (rv < 0)
>> + break;
>> + }
>> + }
>> + if (!scan_root_list_head)
>> + rv = -EINVAL;
>> +
>> + if (f)
>> + fclose(f);
>> + return rv;
>> +}
>> diff --git a/utils/blkmapd/cfg.h b/utils/blkmapd/cfg.h
>> new file mode 100644
>> index 0000000..b9bf930
>> --- /dev/null
>> +++ b/utils/blkmapd/cfg.h
>> @@ -0,0 +1,47 @@
>> +/*
>> + * 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
>> +
>> +extern char *conf_path;
>> +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..f42ddc8
>> --- /dev/null
>> +++ b/utils/blkmapd/device-discovery.c
>> @@ -0,0 +1,502 @@
>> +/*
>> + * 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.
>> + */
>> +
>> +#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/blkmapd.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;
>> + struct bl_disk_path *path = NULL;
>> +
>> + while (visible_disk_list) {
>> + disk = visible_disk_list;
>> + path = disk->paths;
>> + while (path) {
>> + disk->paths = path->next;
>> + free(path->full_path);
>> + free(path);
>> + path = disk->paths;
>> + }
>> + if (disk->serial)
>> + free(disk->serial);
>> + visible_disk_list = disk->next;
>> + free(disk);
>> + }
>> +}
>> +
>> +void bl_add_disk(char *filepath)
>> +{
>> + struct bl_disk *disk = NULL;
>> + 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;
>> +
>> + BL_LOG_ERR("%s: %s\n", __func__, filepath);
>> +
>> + 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);
>> +
>> + for (disk = visible_disk_list; disk != NULL; disk = disk->next) {
>> + /* Already scanned or a partition?
>> + * XXX: if released each time, maybe not need to compare
>> + */
>> + if ((serial->len == disk->serial->len) &&
>> + !memcmp(serial->data, disk->serial->data, serial->len)) {
>> + diskpath = bl_get_path(filepath, disk->paths);
>> + break;
>> + }
>> + }
>> +
>> + if (disk && 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 (!disk) { /* 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 = disk->paths;
>> + disk->paths = path;
>> + /* check whether we need to update disk info */
>> + if (bl_update_path(path, path->state, disk)) {
>> + disk->dev = dev;
>> + disk->size = size;
>> + disk->valid_path = path;
>> + }
>> + }
>> + return;
>> +
>> + out_err:
>> + if (path) {
>> + if (path->full_path)
>> + free(path->full_path);
>> + free(path);
>> + }
>> + 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, sizeof(filepath));
>> + if (strlen(filename) < (PATH_MAX - strlen(root->name) - 2))
>> + sprintf(filepath, "%s/%s", root->name, filename);
>> + else {
>> + BL_LOG_ERR("%s: name too long\n", __func__);
>> + 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(filepath, "/dev/sg", 7))
>> + return;
>> + bl_add_disk(filepath);
>> + 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);
>> + }
>> +
>> + 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(int argc, char **argv)
>> +{
>> + int fd, opt, fg = 0, ret = 1;
>> + struct stat statbuf;
>> + char pidbuf[64];
>> +
>> + while ((opt = getopt(argc, argv, "c:f")) != -1) {
>> + switch (opt) {
>> + case 'c':
>> + conf_path = optarg;
>> + break;
>> + case 'f':
>> + fg = 1;
>> + break;
>> + }
>> + }
>> +
>> + if (!stat(PID_FILE, &statbuf)) {
>> + fprintf(stderr, "Pid file already existed\n");
>> + return -1;
>> + }
>> +
>> + if (!fg && daemon(0, 0) != 0) {
>> + fprintf(stderr, "Daemonize failed\n");
>> + return -1;
>> + }
>> +
>> + openlog("blkmapd", 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..9e91840
>> --- /dev/null
>> +++ b/utils/blkmapd/device-process.c
>> @@ -0,0 +1,394 @@
>> +/*
>> + * 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.
>> + */
>> +
>> +#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;
>> +
>> + 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: %s sig: %s, bs_string: %s, bs_length: %d, bs_offset: %lld\n",
>> + __func__, dev_name, sig, comp->bs_string, comp->bs_length,
>> + (long long)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__, (long long) 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..8162706
>> --- /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/blkmapd.conf b/utils/blkmapd/etc/blkmapd.conf
>> new file mode 100644
>> index 0000000..da70d94
>> --- /dev/null
>> +++ b/utils/blkmapd/etc/blkmapd.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/*
>> diff --git a/utils/blkmapd/etc/initd/initd.redhat b/utils/blkmapd/etc/initd/initd.redhat
>> new file mode 100644
>> index 0000000..d6a77e8
>> --- /dev/null
>> +++ b/utils/blkmapd/etc/initd/initd.redhat
>> @@ -0,0 +1,76 @@
>> +#!/bin/sh
>> +#
>> +# description: Starts and stops the iSCSI initiator
>> +#
>> +# processname: blkmapd
>> +# pidfile: /var/run/blkmapd.pid
>> +# config: /etc/blkmapd.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 $"Starting pNFS block-layout device discovery service: "
>> + modprobe -q blocklayoutdriver
>> + daemon /usr/sbin/blkmapd
>> + RETVAL=$?
>> + if [ $RETVAL -eq 0 ]; then
>> + touch /var/lock/subsys/blkmapd
>> + fi
>> + echo
>> + return $RETVAL
>> +}
>> +
>> +stop()
>> +{
>> + echo -n $"Stopping pNFS block-layout device discovery service: "
>> + killproc blkmapd 2> /dev/null
>> + rm -f /var/run/blkmapd.pid
>> + RETVAL=$?
>> + [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/blkmapd
>> + 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 blkmapd
>> + ;;
>> + *)
>> + echo $"Usage: $0 {start|stop|restart|status}"
>> + exit 1
>> +esac
>> +
>> +exit $RETVAL
> --
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