On Tue, May 25, 2004 at 01:55:23PM +0100, Alasdair G Kergon wrote:
> On Mon, May 24, 2004 at 06:00:19PM -0700, Mike Christie wrote:
> > Is there any way
> > I could pass in such a thing when my target is created, so that way dm
> > multipath
> > would not have any type of command format functions/modules or definitions
> > (it could just be passed in and built like the sg io code).
> We've been talking about a new dm ioctl for passing arbitrary commands
> to a target, which I think would cover this.
dm-ioctl.h:
#define DM_TARGET_CTL _IOWR(DM_IOCTL, DM_TARGET_CTL_CMD, struct dm_ioctl)
struct dm_target_ctl {
uint64_t sector; /* Device sector */
/* Might add size of command string if it simplifies processing */
char command[0];
};
Is there any legitimate need to supply a list of dm_target_ctl structs
instead of just one-at-once?
Is there any need to allow a string of data to be returned in addition
to the error code? [i.e. Are status/table commands sufficient? ]
Alasdair
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