The name convention of device mapper disk is different, and 'parted' can't be used to delete a device mapper disk partition. e.g. Name Path ----------------------------------------- 3600a0b80005ad1d7000093604cae912fp1 /dev/mapper/3600a0b80005ad1d7000093604cae912fp1 Error: Expecting a partition number. This patch introduces 'dmsetup' to fix it. Changes: - New function "virIsDevMapperDevice" in "src/utils/utils.c" - remove "is_dm_device" in "src/storage/parthelper.c", use "virIsDevMapperDevice" instead. - Requires "device-mapper" for 'with-storage-disk" in "libvirt.spec.in" - Check "dmsetup" in 'configure.ac' for "with-storage-disk" - Changes on "src/Makefile.am" to link against libdevmapper - New entry for "virIsDevMapperDevice" in "src/libvirt_private.syms" Changes from v1 to v3: - s/virIsDeviceMapperDevice/virIsDevMapperDevice/g - replace "virRun" with "virCommand" - sort the list of util functions in "libvirt_private.syms" - ATTRIBUTE_NONNULL(1) for virIsDevMapperDevice declaration. e.g. Name Path ----------------------------------------- 3600a0b80005ad1d7000093604cae912fp1 /dev/mapper/3600a0b80005ad1d7000093604cae912fp1 Vol /dev/mapper/3600a0b80005ad1d7000093604cae912fp1 deleted Name Path ----------------------------------------- --- configure.ac | 28 +++++++++++++++------ libvirt.spec.in | 1 + src/Makefile.am | 8 +++--- src/libvirt_private.syms | 2 +- src/storage/parthelper.c | 14 +--------- src/storage/storage_backend_disk.c | 48 +++++++++++++++++++++-------------- src/util/util.c | 15 +++++++++++ src/util/util.h | 2 + 8 files changed, 73 insertions(+), 45 deletions(-) diff --git a/configure.ac b/configure.ac index 3cd824a..44a3b19 100644 --- a/configure.ac +++ b/configure.ac @@ -1725,12 +1725,19 @@ LIBPARTED_LIBS= if test "$with_storage_disk" = "yes" || test "$with_storage_disk" = "check"; then AC_PATH_PROG([PARTED], [parted], [], [$PATH:/sbin:/usr/sbin]) + AC_PATH_PROG([DMSETUP], [dmsetup], [], [$PATH:/sbin:/usr/sbin]) if test -z "$PARTED" ; then PARTED_FOUND=no else PARTED_FOUND=yes fi + if test -z "$DMSETUP" ; then + DMSETUP_FOUND=no + else + DMSETUP_FOUND=yes + fi + if test "$PARTED_FOUND" = "yes" && test "x$PKG_CONFIG" != "x" ; then PKG_CHECK_MODULES([LIBPARTED], [libparted >= $PARTED_REQUIRED], [], [PARTED_FOUND=no]) @@ -1748,14 +1755,17 @@ if test "$with_storage_disk" = "yes" || CFLAGS="$save_CFLAGS" fi - if test "$PARTED_FOUND" = "no" ; then - if test "$with_storage_disk" = "yes" ; then - AC_MSG_ERROR([We need parted for disk storage driver]) - else - with_storage_disk=no - fi - else - with_storage_disk=yes + if test "$with_storage_disk" = "yes" && + test "$PARTED_FOUND:$DMSETUP_FOUND" != "yes:yes"; then + AC_MSG_ERROR([Need both parted and dmsetup for disk storage driver]) + fi + + if test "$with_storage_disk" = "check"; then + if test "$PARTED_FOUND:$DMSETUP_FOUND" != "yes:yes"; then + with_storage_disk=no + else + with_storage_disk=yes + fi fi if test "$with_storage_disk" = "yes"; then @@ -1763,6 +1773,8 @@ if test "$with_storage_disk" = "yes" || [whether Disk backend for storage driver is enabled]) AC_DEFINE_UNQUOTED([PARTED],["$PARTED"], [Location or name of the parted program]) + AC_DEFINE_UNQUOTED([DMSETUP],["$DMSETUP"], + [Location or name of the dmsetup program]) fi fi AM_CONDITIONAL([WITH_STORAGE_DISK], [test "$with_storage_disk" = "yes"]) diff --git a/libvirt.spec.in b/libvirt.spec.in index 5021f45..8cb8fad 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -279,6 +279,7 @@ Requires: iscsi-initiator-utils %if %{with_storage_disk} # For disk driver Requires: parted +Requires: device-mapper %endif %if %{with_storage_mpath} # For multipath support diff --git a/src/Makefile.am b/src/Makefile.am index 2f94efd..6e14043 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -437,9 +437,9 @@ libvirt_la_BUILT_LIBADD = libvirt_util.la libvirt_util_la_SOURCES = \ $(UTIL_SOURCES) libvirt_util_la_CFLAGS = $(CAPNG_CFLAGS) $(YAJL_CFLAGS) $(LIBNL_CFLAGS) \ - $(AM_CFLAGS) $(AUDIT_CFLAGS) + $(AM_CFLAGS) $(AUDIT_CFLAGS) $(DEVMAPPER_CFLAGS) libvirt_util_la_LIBADD = $(CAPNG_LIBS) $(YAJL_LIBS) $(LIBNL_LIBS) \ - $(LIB_PTHREAD) $(AUDIT_LIBS) + $(LIB_PTHREAD) $(AUDIT_LIBS) $(DEVMAPPER_LIBS) noinst_LTLIBRARIES += libvirt_conf.la @@ -1154,7 +1154,6 @@ libvirt_parthelper_SOURCES = $(STORAGE_HELPER_DISK_SOURCES) libvirt_parthelper_LDFLAGS = $(WARN_LDFLAGS) $(AM_LDFLAGS) libvirt_parthelper_LDADD = \ $(LIBPARTED_LIBS) \ - $(DEVMAPPER_LIBS) \ libvirt_util.la \ ../gnulib/lib/libgnu.la @@ -1179,7 +1178,8 @@ libvirt_lxc_SOURCES = \ libvirt_lxc_LDFLAGS = $(WARN_CFLAGS) $(AM_LDFLAGS) libvirt_lxc_LDADD = $(CAPNG_LIBS) $(YAJL_LIBS) \ $(LIBXML_LIBS) $(NUMACTL_LIBS) $(LIB_PTHREAD) \ - $(LIBNL_LIBS) $(AUDIT_LIBS) ../gnulib/lib/libgnu.la + $(LIBNL_LIBS) $(AUDIT_LIBS) $(DEVMAPPER_LIBS) \ + ../gnulib/lib/libgnu.la libvirt_lxc_CFLAGS = \ $(LIBPARTED_CFLAGS) \ $(NUMACTL_CFLAGS) \ diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index b9e3efe..1ab3da3 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -884,6 +884,7 @@ virGetUserID; virGetUserName; virHexToBin; virIndexToDiskName; +virIsDevMapperDevice; virKillProcess; virMacAddrCompare; virParseMacAddr; @@ -910,7 +911,6 @@ virStrncpy; virTimestamp; virVasprintf; - # uuid.h virGetHostUUID; virSetHostUUIDStr; diff --git a/src/storage/parthelper.c b/src/storage/parthelper.c index 6ef413d..acc9171 100644 --- a/src/storage/parthelper.c +++ b/src/storage/parthelper.c @@ -59,18 +59,6 @@ enum diskCommand { DISK_GEOMETRY }; -static int -is_dm_device(const char *devname) -{ - struct stat buf; - - if (devname && !stat(devname, &buf) && dm_is_dm_major(major(buf.st_rdev))) { - return 1; - } - - return 0; -} - int main(int argc, char **argv) { PedDevice *dev; @@ -96,7 +84,7 @@ int main(int argc, char **argv) } path = argv[1]; - if (is_dm_device(path)) { + if (virIsDevMapperDevice(path)) { partsep = "p"; canonical_path = strdup(path); if (canonical_path == NULL) { diff --git a/src/storage/storage_backend_disk.c b/src/storage/storage_backend_disk.c index c7ade6b..70e3ba6 100644 --- a/src/storage/storage_backend_disk.c +++ b/src/storage/storage_backend_disk.c @@ -31,6 +31,7 @@ #include "storage_backend_disk.h" #include "util.h" #include "memory.h" +#include "command.h" #include "configmake.h" #define VIR_FROM_THIS VIR_FROM_STORAGE @@ -647,6 +648,8 @@ virStorageBackendDiskDeleteVol(virConnectPtr conn ATTRIBUTE_UNUSED, char *part_num = NULL; char *devpath = NULL; char *devname, *srcname; + virCommandPtr cmd = NULL; + bool isDevMapperDevice; int rc = -1; if (virFileResolveLink(vol->target.path, &devpath) < 0) { @@ -660,36 +663,43 @@ virStorageBackendDiskDeleteVol(virConnectPtr conn ATTRIBUTE_UNUSED, srcname = basename(pool->def->source.devices[0].path); DEBUG("devname=%s, srcname=%s", devname, srcname); - if (!STRPREFIX(devname, srcname)) { + isDevMapperDevice = virIsDevMapperDevice(devpath); + + if (!isDevMapperDevice && !STRPREFIX(devname, srcname)) { virStorageReportError(VIR_ERR_INTERNAL_ERROR, _("Volume path '%s' did not start with parent " "pool source device name."), devname); goto cleanup; } - part_num = devname + strlen(srcname); + if (!isDevMapperDevice) { + part_num = devname + strlen(srcname); - if (*part_num == 0) { - virStorageReportError(VIR_ERR_INTERNAL_ERROR, - _("cannot parse partition number from target " - "'%s'"), devname); - goto cleanup; - } + if (*part_num == 0) { + virStorageReportError(VIR_ERR_INTERNAL_ERROR, + _("cannot parse partition number from target " + "'%s'"), devname); + goto cleanup; + } - /* eg parted /dev/sda rm 2 */ - const char *prog[] = { - PARTED, - pool->def->source.devices[0].path, - "rm", - "--script", - part_num, - NULL, - }; + cmd = virCommandNewArgList(PARTED, + pool->def->source.devices[0].path, + "rm", + "--script", + part_num, + NULL); - if (virRun(prog, NULL) < 0) - goto cleanup; + if (virCommandRun(cmd, NULL) < 0) + goto cleanup; + } else { + cmd = virCommandNewArgList(DMSETUP, "remove", "--force", devpath, NULL); + + if (virCommandRun(cmd, NULL) < 0) + goto cleanup; + } rc = 0; cleanup: VIR_FREE(devpath); + virCommandFree(cmd); return rc; diff --git a/src/util/util.c b/src/util/util.c index 6161be6..1ec61b8 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -45,6 +45,7 @@ #include <string.h> #include <signal.h> #include <termios.h> +#include <libdevmapper.h> #include "c-ctype.h" #ifdef HAVE_PATHS_H @@ -3123,3 +3124,17 @@ virTimestamp(void) return timestamp; } + +bool +virIsDevMapperDevice(const char *devname) +{ + struct stat buf; + + if (!stat(devname, &buf) && + S_ISBLK(buf.st_mode) && + dm_is_dm_major(major(buf.st_rdev))) + return true; + + return false; +} + diff --git a/src/util/util.h b/src/util/util.h index 8373038..10d3253 100644 --- a/src/util/util.h +++ b/src/util/util.h @@ -296,4 +296,6 @@ int virBuildPathInternal(char **path, ...) ATTRIBUTE_SENTINEL; char *virTimestamp(void); +bool virIsDevMapperDevice(const char *devname) ATTRIBUTE_NONNULL(1); + #endif /* __VIR_UTIL_H__ */ -- 1.7.4