On 02/08/2011 03:30 AM, Osier Yang wrote:
> @@ -1739,11 +1746,23 @@ if test "$with_storage_disk" = "yes" ||
> with_storage_disk=yes
> fi
>
> + if test "$DMSETUP_FOUND" = "no" ; then
> + if test "$with_storage_disk" = "yes" ; then
> + AC_MSG_ERROR([We need dmsetup for disk storage driver])
> + else
> + with_storage_disk=no
> + fi
> + else
> + with_storage_disk=yes
> + fi
Logic is still not right here. You have two separate if clauses that
both try to convert with_storage_disk=check into
with_storage_disk=yes/no, but after the first block has run, the second
block never knwos that with_storage_disk used to be check.
It needs to be something like:
if test "$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
That is, if with_storage_disk is yes, then insist that both programs be
found; if with_storage_disk is check, then set with_storage_disk exactly
once based on the presence of both programs.
So we'll need to see a v3.
> @@ -895,6 +896,8 @@ virSetCloseExec;
> virSetNonBlock;
> virSetUIDGID;
> virSkipSpaces;
> +virStrcpy;
> +virStrncpy;
> virStrToDouble;
> virStrToLong_i;
> virStrToLong_l;
> @@ -902,8 +905,6 @@ virStrToLong_ll;
> virStrToLong_ui;
> virStrToLong_ul;
> virStrToLong_ull;
> -virStrcpy;
> -virStrncpy;
Hmm, you must have used emacs sorting while in LC_ALL=en_US.UTF-8
instead of LC_ALL=C. Personally, I leave LC_ALL undefined,
LANG=en_US.UTF-8, and LC_COLLATE=C, to get byte-value sorting
everywhere. I'm not sure if it makes sense to keep these hunks.
> @@ -660,38 +662,46 @@ virStorageBackendDiskDeleteVol(virConnectPtr conn ATTRIBUTE_UNUSED,
> srcname = basename(pool->def->source.devices[0].path);
> DEBUG("devname=%s, srcname=%s", devname, srcname);
>
> - if (!STRPREFIX(devname, srcname)) {
> + if (!virIsDevMapperDevice(devpath) && !STRPREFIX(devname, srcname)) {
Let's swap the order of the conditionals. STRPREFIX is potentially
faster than virIsDevMapperDevice (since the latter calls stat() directly
and who knows what other syscalls in dm_is_dm_major).
> 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 (!virIsDevMapperDevice(devpath)) {
And, since it involves syscalls, can we cache the answer in a local bool
variable, rather than calling it twice?
> + } else {
> + cmd = virCommandNew(DMSETUP);
> + virCommandAddArgList(cmd, "remove", "--force", devpath, NULL);
If you want, you can use virCommandNewArgList instead of
virCommandNew/virCommandAddArgList.
> +bool
> +virIsDevMapperDevice(const char *devname)
> +{
> + struct stat buf;
> +
> + if (devname &&
> + !stat(devname, &buf) &&
> + dm_is_dm_major(major(buf.st_rdev)))
major() is not required by POSIX; are we guaranteed that this will
compile everywhere? Also, are we sure that st_rdev is defined on all
file types, or should we add an extra condition that S_ISBLK(buf.st_mode)?
--
Eric Blake eblake@xxxxxxxxxx +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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