Dean,
(blink) (blink) Gee, Now it seems obvious. I must have misread that
section (6_09) twenty times. Perhaps i should cut back on the coffee.
Thanks kindly for your translation.
Ben
On Mon, 2004-06-14 at 09:38, Dean Roehrich wrote:
> The function dm_create_userevent creates an async event, and immediately
> returns the token value. You cannot use dm_get_events to retrieve this
> one--it behaves as if dm_get_events has already been used. You do need to use
> the returned token to call dm_respond_event.
>
> The function dm_send_msg creates synchronous or asynchronous events, and this
> event can be retrieved with dm_get_events. In both cases these events can be
> retrieved with dm_get_events.
>
> See:
> http://www.opengroup.org/onlinepubs/9657099/chap3.htm#tagcjh_04_06
> http://www.opengroup.org/onlinepubs/9657099/chap5.htm#tagcjh_06_09
> http://www.opengroup.org/onlinepubs/9657099/chap5.htm#tagcjh_06_49
>
>
> Dean
>
>
>
>
> >From: Ben Myers <dative@xxxxxxxxxxx>
> >Hi folks,
> >
> >I hope this is the right place to ask why i can't seem to get
> >DM_USER_EVENT messages via calls to dm_get_events. I've been struggling
> >with it in my code for a few days so i decided to checkout the testsuite
> >and try it. The testsuite i'm using was checked out yesterday, and the
> >kernel is from (roughly) a month ago.
> >
> >Here's the order of things:
> ><reboot>
> >
> >I start up 'print_event' from the testsuite:
> ># ./print_event -R /home/dative/dmapp/mnt
> >
> >(in another shell) i unmount the filesystem i'm using for a test:
> ># umount /home/dative/dmapp/mnt
> >
> >here's the line from my fstab:
> >/home/dative/dmapp/testfs.xfs /home/dative/dmapp/mnt xfs
> >loop,quota,dmapi,mtpt=/home/dative/dmapp/mnt 0 0
> >
> >Then i remount it:
> ># mount /home/dative/dmapp/mnt
> >
> >...and try to send a message with 'create_userevent' (from the suite):
> ># ./create_userevent -s 1 "hello, world"
> >New token 5
> >#
> >
> >but the user event isn't printed out by 'print_event'. this is the total
> >output:
> >preunmount: token 1 sequence 1
> > fs handle 8baa21bc1029db24
> > root dir 8baa21bc1029db240e00000000000000804b000000000000
> > unmount mode NOFORCE
> >unmount: token 2 sequence 2
> > fs handle 8baa21bc1029db24
> > unmount mode NOFORCE
> > retcode 0
> >mount: token 3 sequence 3
> > fs handle 8baa21bc1029db24
> > mtpt handle <BAD HANDLE, hlen 0> *
> > mtpt path /home/dative/dmapp/mnt
> > media desig loop(7,0)
> > root handle 8baa21bc1029db240e00000000000000804b000000000000
> > mode 0
> >
> >* because i didn't mount that xfs fs with the dmapi options?
> >
> >in my application i am able to get the user event and corresponding
> >message via dm_getall_tokens and then a dm_find_eventmsg, but not via
> >dm_get_events. my understanding (from the dmapi document) is that i
> >should be able to get userevents via dm_get_events**. have i missed
> >something?
> >
> >thanks and regards,
> >-ben
> >
> >** i think that it may have been working about a week ago. i had set an
> >eventlist on a file and then was able to get userevents via
> >dm_get_events, but am not sure. i'll check on that.
> >
> >
>
|