On Wed, May 28, 2003 at 02:18:29PM -0500, Kevin Corry wrote:
> I was just wondering if you have a timeframe in mind for when the new ioctl
> interface will be officially released
As soon as it has satisfied all our internal tests, which I genuinely hope
is only a few days away now...
We have still been finding some small things to fix/change before release:
the latest is the addition of the long-awaited command to list the
names of devices, which we just got working a couple of hours ago.
Current interface definition (which could still need tweaking):
#define DM_LIST_DEVICES _IOWR(DM_IOCTL, DM_LIST_DEVICES_CMD, struct dm_ioctl)
struct dm_name_list {
uint64_t dev;
uint32_t next; /* offset to the next record from
the _start_ of this */
char name[0];
};
Data comes in repeating struct dm_name_lists the same way as deps, table etc.
It returns names not uuids. [Enhancement is likely to provide the choice.]
If the whole data won't fit, it returns no data & sets DM_BUFFER_FULL_FLAG.
If there are no mapped devices defined, the first structure's dev is 0.
The last item has next == 0.
(The info fields don't get filled.)
# dmsetup ls
vg1-lvol1 (254, 0)
vg1-lvol2 (254, 1)
# dmsetup ls
No devices found.
Alasdair
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