amp;m=154831889001973&w=2 discusses some of them
> also.
>
Especially the TMFs send via SCSI EH are a bit of a pain I guess,
because they are entirely managed by the device drivers, but depending
on the device driver they might not even qualify for the problem Hannes
is seeing.
--
With Best Rega
ar stuff happening.
Beste Grüße / Best regards,
- Benjamin Block
--
Linux on z Systems Development / IBM Systems & Technology Group
IBM Deutschland Research &
On Wed, Apr 12, 2017 at 06:11:25PM +, Bart Van Assche wrote:
> On Wed, 2017-04-12 at 12:55 +0200, Benjamin Block wrote:
> > On Fri, Apr 07, 2017 at 11:16:48AM -0700, Bart Van Assche wrote:
> > > The six patches in this patch series fix the queue lockup I reported
> >
> 1 file changed, 72 insertions(+), 86 deletions(-)
>
Looks fine to me. Did ran the same small test-tool I ran against Jens'
patches, nothing broke.
Reviewed-by: Benjamin Block
Tested-by: Benjamin Block
--
With Best Regards, Benjamin Block / Linux on IBM Z Kernel Develop
every using them? That seems wrong to me.
There is other SCSI Command Sets than OSD that provide bidirectional
commands, even SBC has some (i.e. X*WRITE*, COMPARE AND WRITE).
--
With Best Regards, Benjamin Block / Linux on IBM Z Kernel Development
IBM Systems & Technol
On Wed, Nov 14, 2018 at 04:48:57PM +0100, Christoph Hellwig wrote:
> On Tue, Nov 13, 2018 at 03:35:20PM +0100, Benjamin Block wrote:
> > This seems like a non-obvious user-breakage. So apart from removing the
> > in-kernel stuff that uses bidirectional commands you also forbid
>
/2016 09:27 AM, Mike Snitzer wrote:
> > >>>On Wed, Aug 03 2016 at 11:35am -0400,
> > >>>Benjamin Block wrote:
> > >>>
> > >>>>Hej Mike,
> > >>>>
> > >>>>when running a debug-kernel today with severa
/2016 09:27 AM, Mike Snitzer wrote:
> > >>>On Wed, Aug 03 2016 at 11:35am -0400,
> > >>>Benjamin Block wrote:
> > >>>
> > >>>>Hej Mike,
> > >>>>
> > >>>>when running a debug-kernel today with severa
On 10:39 Mon 08 Aug , Jens Axboe wrote:
> On 08/08/2016 10:32 AM, Benjamin Block wrote:
> >On 12:06 Fri 05 Aug , Mike Snitzer wrote:
> >>On Fri, Aug 05 2016 at 11:54am -0400,
> >>Jens Axboe wrote:
> >>
> >>>On 08/05/2016 09:42 AM, Mike Sn
ex 736a1f4f9676..4889bd432382 100644
> --- a/drivers/scsi/scsi_transport_sas.c
> +++ b/drivers/scsi/scsi_transport_sas.c
> @@ -228,7 +228,6 @@ static int sas_bsg_initialize(struct Scsi_Host *shost,
> struct sas_rphy *rphy)
>*/
> blk_queue_bounce_limit(q, BLK_BOUNCE_
On Fri, Oct 20, 2017 at 06:26:30PM +0200, Christoph Hellwig wrote:
> On Thu, Oct 19, 2017 at 05:59:33PM +0200, Benjamin Block wrote:
> > > +#define ptr64(val) ((void __user *)(uintptr_t)(val))
> >
> > Better to reflect the special property, that it is a user pointer, in
&
n the source. Driver makes use of it, but only reading as far as I
could make out after browsing the code for a bit.
I did a quick test with that change in place and that seems to work fine
now. As far as my tests go, they behave as they did before.
(null)
INFO: lockdep is turned off.
Last Breaking-Event-Address:
[<03ff801e41d6>] zfcp_fc_ct_job_handler+0x3e/0x48 [zfcp]
Kernel panic - not syncing: Fatal exception in interrupt
To prevent this, allocate a buffer when the BSG blk-request is setup, and
before it is queued for LLD processi
Since struct bsg_command is now used in every calling case, we don't
need separation of arguments anymore that are contained in the same
bsg_command.
Signed-off-by: Benjamin Block
---
block/bsg.c | 20 +---
1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/
SG_IO.
A complete unification is not possible, as it then would also enqueue SG_IO
commands in the BGS devices's command list, but this is only for the read-
and write-calls.
Signed-off-by: Benjamin Block
---
block/bsg.c | 60
1 fi
Since struct bsg_command is now used in every calling case, we don't
need separation of arguments anymore that are contained in the same
bsg_command.
Signed-off-by: Benjamin Block
---
block/bsg.c | 13 ++---
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/block/bs
.
To make it easier to notice accidental violations add an explicit compile-
time check that tests whether the implementations' reply buffer is at most
as large as bsg_job's.
To do so, we have to move the size-define from bsg.c to a common header.
Signed-off-by: Benjamin Blo
390/zfcp-hbaapi.html) and
some custom code to test the read/write interface of BSG.
Reviews are more than welcome :)
Beste Grüße / Best regards,
- Benjamin Block
Benjamin Block (6):
bsg: fix kernel
ply.
*
* ...
*/
Signed-off-by: Benjamin Block
---
block/bsg-lib.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index c4513b23f57a..c7c2c6bbb5ae 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -147,8 +147,8 @@ static int bsg_create_
uld be best if we fix the possible panics every user of
this is gonna experience and after that we can still think about
improving it further beyond what the rest of the patch set already does,
if that is necessary.
Beste Grüße / Best regard
On Thu, Aug 10, 2017 at 10:24:56AM +0200, Johannes Thumshirn wrote:
> On Wed, Aug 09, 2017 at 04:11:18PM +0200, Benjamin Block wrote:
> > + return 0 == (bc->hdr.flags & BSG_FLAG_Q_AT_TAIL);
>
> return !(bc->hdr.flags & BSG_FLAG_Q_AT_TAIL); and make the function r
On Thu, Aug 10, 2017 at 11:35:31AM +0200, Christoph Hellwig wrote:
> On Wed, Aug 09, 2017 at 04:11:19PM +0200, Benjamin Block wrote:
> > Since struct bsg_command is now used in every calling case, we don't
> > need separation of arguments anymore that are contained in the
On Fri, Aug 11, 2017 at 12:10:38AM +0200, Benjamin Block wrote:
> On Thu, Aug 10, 2017 at 11:32:17AM +0200, Christoph Hellwig wrote:
> > We can't use an on-stack buffer for the sense data, as drivers will
> > dma to it. So we should reuse the SCSI init_rq_fn() for the B
n Sep 17 00:00:00 2001
> From: Christoph Hellwig
> Date: Fri, 11 Aug 2017 11:03:29 +0200
> Subject: bsg-lib: allocate sense data for each request
>
> Since we split the scsi_request out of the request the driver is supposed
> to provide storage fo
On Fri, Aug 11, 2017 at 04:36:49PM +0200, Christoph Hellwig wrote:
> On Fri, Aug 11, 2017 at 03:49:29PM +0200, Benjamin Block wrote:
> > On Fri, Aug 11, 2017 at 11:14:15AM +0200, Christoph Hellwig wrote:
> > > But patch 1 still creates an additional copy of the sense data for
&
On Fri, Aug 11, 2017 at 05:35:53PM +0200, Christoph Hellwig wrote:
> On Fri, Aug 11, 2017 at 05:32:03PM +0200, Benjamin Block wrote:
> > So when the bsg interface is used with something different than the
> > bsg-lib request queue?
>
> Yes.
>
> > I haven't act
ta, which is used as reply buffer in bsg.
>
> Reported-by: Steffen Maier
> Signed-off-by: Benjamin Block
> Fixes: 82ed4db499b8 ("block: split scsi_request out of struct request")
> Cc: #4.11+
> ---
> block/bsg-lib.c | 51
> +++
On Sun, Aug 13, 2017 at 04:39:40PM +0200, Christoph Hellwig wrote:
> On Fri, Aug 11, 2017 at 06:01:42PM +0200, Benjamin Block wrote:
> > When the BSG interface is used with bsg-lib, and the user sends a
> > Bidirectional command - so when he gives an input- and output-buffer
> &g
' for-next.
Reviews are more than welcome :)
Beste Grüße / Best regards,
- Benjamin Block
Benjamin Block (1):
bsg-lib: fix kernel panic resulting from missing allocation of
reply
n of a buffer for the reply-data.
This means, struct bsg_job is not allocated separately anymore, but as part
of struct request allocation - similar to struct scsi_cmd. Reflect this in
the function names that used to handle creation/destruction of struct
bsg_job.
Reported-by: Steffen Maier
Suggested-
t
doesn't really itself destroy the job-struct anymore. If there are other
thing amiss I can change that along with them, if it bothers poeple.
Beste Grüße / Best regards,
- Benjamin Block
On Wed, Sep 06, 2017 at 08:07:43AM -0600, Jens Axboe wrote:
> On 09/06/2017 07:44 AM, Christoph Hellwig wrote:
> > From: Benjamin Block
> >
> > Since we split the scsi_request out of struct request bsg fails to
> > provide a reply-buffer for the drivers. This was d
ng talk short question, is that intended?
Beste Grüße / Best regards,
- Benjamin Block
--
Linux on z Systems Development / IBM Systems & Technology Group
IBM Deutschland Research & Deve
ssing
allocation of reply-buffer")
Cc: # 4.11+
Signed-off-by: Benjamin Block
---
Notes:
I did test this on zFCP with FC CT commands send via the ioctl() and
write() system-call. That did work fine. But I would very much
appreciate if anyone could run this against an other HBA or e
On Tue, Sep 19, 2017 at 02:16:26PM -0400, Douglas Gilbert wrote:
> On 2017-09-19 10:56 AM, Benjamin Block wrote:
> > Hello linux-block,
> >
> > I wrote some tests recently to test patches against bsg.c and bsg-lib.c,
> > and while writing those I noticed something str
g names and name the new helper bsg_initialize_rq;
>
OK, I can change that.
Beste Grüße / Best regards,
- Benjamin Block
>
> Except for that the patch looks fine to me:
>
> Reviewed-by: Christoph Hellwig
>
--
Linux on
iously done in bsg_init_rq(), and will
also do it when the request is taken from the emergency-pool of the
backing mempool.
Fixes: 50b4d485528d ("bsg-lib: fix kernel panic resulting from missing
allocation of reply-buffer")
Cc: # 4.11+
Reviewed-by: Christoph Hellwig
Signed-off-
x b1be0233ce35..402223c95ce1 100644
> --- a/include/linux/bsg-lib.h
> +++ b/include/linux/bsg-lib.h
> @@ -44,6 +44,8 @@ struct bsg_job {
>
> struct kref kref;
>
> + unsigned int timeout;
> +
> /* Transpo
g-lib.h b/include/linux/bsg-lib.h
> index 402223c95ce1..08762d297cbd 100644
> --- a/include/linux/bsg-lib.h
> +++ b/include/linux/bsg-lib.h
> @@ -40,7 +40,6 @@ struct bsg_buffer {
> struct bsg_job {
> struct scsi_request sreq;
> struct device *dev;
> - stru
mand(cmd, filp->f_mode & FMODE_WRITE);
> + return blk_verify_command(cmd, filp->f_mode);
> }
>
> static int
> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> index 02fa42d24b52..75fe9d45ead1 100644
> --- a/include/linux/blkdev.h
> +++ b/inc
Fatal exception: panic_on_oops
run blktests block/003 at 2019-06-06 14:44:56
When I tried to reproduced this with this patch, it went away (at least all of
blktest/block ran w/o crash).
I don't feel competent enough to review this patch right now, but it would be
good if we get somethin
, see the following link:
>
> https://lore.kernel.org/linux-block/f122e8f2-5ede-2d83-9ca0-bc713ce66...@huawei.com/T/#t
>
> V2:
> - run .cleanup_rq() in blk_mq_free_request(), as suggested by Mike
--
With Best Regards, Benjamin Block / Linux on IBM Z Kernel Development
IBM Syste
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