* [PATCH] IB/mlx4: avoid a -Wmaybe-uninitialize warning
From: Arnd Bergmann @ 2016-10-25 16:16 UTC (permalink / raw)
To: Yishai Hadas
Cc: Arnd Bergmann, David S. Miller, Jack Morgenstein, Or Gerlitz,
Eran Ben Elisha, Moshe Shemesh, Christophe Jaillet, Moni Shoua,
netdev, linux-rdma, linux-kernel
There is an old warning about mlx4_SW2HW_EQ_wrapper on x86:
ethernet/mellanox/mlx4/resource_tracker.c: In function ‘mlx4_SW2HW_EQ_wrapper’:
ethernet/mellanox/mlx4/resource_tracker.c:3071:10: error: ‘eq’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
The problem here is that gcc won't track the state of the variable
across a spin_unlock. Moving the assignment out of the lock is
safe here and avoids the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index 84d7857ccc27..c548beaaf910 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -1605,13 +1605,14 @@ static int eq_res_start_move_to(struct mlx4_dev *dev, int slave, int index,
r->com.from_state = r->com.state;
r->com.to_state = state;
r->com.state = RES_EQ_BUSY;
- if (eq)
- *eq = r;
}
}
spin_unlock_irq(mlx4_tlock(dev));
+ if (!err && eq)
+ *eq = r;
+
return err;
}
--
2.9.0
^ permalink raw reply related
* Re: [PATCH v3 5/6] ib_iser: log the connection reject message
From: Sagi Grimberg @ 2016-10-25 16:34 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, hch-jcswGhMUV9g,
axboe-b10kYP2dOMg, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <11419a4af998b6d28df0040efbbf149e44cf1fe5.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
> + case RDMA_CM_EVENT_REJECTED:
> + iser_info("Connection rejected: %s\n",
> + rdma_reject_msg(cma_id, event->status));
> + /*FALLTHROUGH*/
NIT: /* FALLTHROUGH */
Otherwise:
Acked-by: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
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* Re: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Sagi Grimberg @ 2016-10-25 16:36 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, hch-jcswGhMUV9g,
axboe-b10kYP2dOMg, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <55638a1d2a9f79af8b9a19eb444c5d0a41691352.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
> +static const char *const nvme_rdma_cm_status_strs[] = {
> + [NVME_RDMA_CM_INVALID_LEN] = "invalid length",
> + [NVME_RDMA_CM_INVALID_RECFMT] = "invalid record format",
> + [NVME_RDMA_CM_INVALID_QID] = "invalid queue id",
> + [NVME_RDMA_CM_INVALID_HSQSIZE] = "invalid host sq size",
> + [NVME_RDMA_CM_INVALID_HRQSIZE] = "invalid host rq size",
> + [NVME_RDMA_CM_NO_RSC] = "resource not found",
> + [NVME_RDMA_CM_INVALID_IRD] = "invalid ird",
> + [NVME_RDMA_CM_INVALID_ORD] = "Invalid ord",
> +};
I think it'd be better to move them to include/linux/nvme-rdma.h
and use them for logging on the target side too.
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* Re: [PATCH v3 2/6] rdma_cm: add rdma_is_consumer_reject() helper function
From: Sagi Grimberg @ 2016-10-25 16:36 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, hch-jcswGhMUV9g,
axboe-b10kYP2dOMg, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <66890f3b3abede2fe9fa658b91450c24ab516ed1.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Sagi Grimberg <sagi-egDjqUIXVlxBDLzU/O5InQ@public.gmane.org>
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* Re: [PATCH v3 3/6] rdma_cm: add rdma_consumer_reject_data helper function
From: Sagi Grimberg @ 2016-10-25 16:36 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, hch-jcswGhMUV9g,
axboe-b10kYP2dOMg, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <7690d653aefbf9ff51dfa6c1ebef57b47616be23.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Sagi Grimberg <sagi-egDjqUIXVlxBDLzU/O5InQ@public.gmane.org>
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* Re: [PATCH v3 1/6] rdma_cm: add rdma_reject_msg() helper function
From: Sagi Grimberg @ 2016-10-25 16:37 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, hch-jcswGhMUV9g,
axboe-b10kYP2dOMg, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <ca2185d1f1e9008922d1b344f3887d400a1d6053.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Sagi Grimberg <sagi-egDjqUIXVlxBDLzU/O5InQ@public.gmane.org>
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* Re: [PATCH 0/6] Six NVMeOF-related patches
From: Sagi Grimberg @ 2016-10-25 16:48 UTC (permalink / raw)
To: Bart Van Assche, Keith Busch
Cc: Jens Axboe, Christoph Hellwig,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Doug Ledford, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
In-Reply-To: <e96f7b21-9686-c24f-9c64-e6fb4b44fea0-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
Hey Bart,
Queued patches 1-4 to nvmf-4.9-rc branch
I'll wait for 5/6 and Steve has generalized
6/6 to RDMA core so I guess it will go out
of Doug's tree.
Steve, your set is probably a 4.10 material,
can you please verify it applies cleanly on
nvmf-4.9-rc (or give Doug a heads-up if not)
Thanks!
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* Re: [PATCH v2 03/12] IB/hfi1: Fix an Oops on pci device force remove
From: Jason Gunthorpe @ 2016-10-25 16:48 UTC (permalink / raw)
To: Dennis Dalessandro
Cc: dledford-H+wXaHxf7aLQT0dZR+AlfA,
linux-rdma-u79uwXL29TY76Z2rM5mHXA, Dean Luick, Ira Weiny,
Tadeusz Struk
In-Reply-To: <20161025155754.4950.23412.stgit-9QXIwq+3FY+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
On Tue, Oct 25, 2016 at 08:57:55AM -0700, Dennis Dalessandro wrote:
> From: Tadeusz Struk <tadeusz.struk-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>
> This patch fixes an Oops on device unbind, when the device is used
> by a PSM user process. PSM processes access device resources which
> are freed on device removal. Similar protection exists in uverbs
> in ib_core for Verbs clients, but PSM doesn't use ib_uverbs hence
> a separate protection is required for PSM clients.
nit: This isn't similar to uverbs or other IB core interfaces - they
all allow unbind while the FD remains open, this forces the FD to
become closed - which means hot plug will not be supported by hfi1.
Otherwise this seems resonable.
Jason
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* RE: [PATCH 0/6] Six NVMeOF-related patches
From: Steve Wise @ 2016-10-25 16:55 UTC (permalink / raw)
To: 'Sagi Grimberg', 'Bart Van Assche',
'Keith Busch'
Cc: 'Jens Axboe', linux-rdma-u79uwXL29TY76Z2rM5mHXA,
'Doug Ledford', 'Christoph Hellwig',
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
In-Reply-To: <29dcbb7a-087b-b18b-3f7c-9841242328b2-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
> Hey Bart,
>
> Queued patches 1-4 to nvmf-4.9-rc branch
>
> I'll wait for 5/6 and Steve has generalized
> 6/6 to RDMA core so I guess it will go out
> of Doug's tree.
>
> Steve, your set is probably a 4.10 material,
> can you please verify it applies cleanly on
> nvmf-4.9-rc (or give Doug a heads-up if not)
>
> Thanks!
I will. I will submit another, potentially final, version including review tags
and also a few changes based on this round's comments.
Steve.
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* RE: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Steve Wise @ 2016-10-25 16:58 UTC (permalink / raw)
To: 'Sagi Grimberg', dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, axboe-b10kYP2dOMg,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ, hch-jcswGhMUV9g
In-Reply-To: <7191d136-aef4-9fed-223e-f2a9c1d958e5-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
> > +static const char *const nvme_rdma_cm_status_strs[] = {
> > + [NVME_RDMA_CM_INVALID_LEN] = "invalid length",
> > + [NVME_RDMA_CM_INVALID_RECFMT] = "invalid record format",
> > + [NVME_RDMA_CM_INVALID_QID] = "invalid queue id",
> > + [NVME_RDMA_CM_INVALID_HSQSIZE] = "invalid host sq size",
> > + [NVME_RDMA_CM_INVALID_HRQSIZE] = "invalid host rq size",
> > + [NVME_RDMA_CM_NO_RSC] = "resource not found",
> > + [NVME_RDMA_CM_INVALID_IRD] = "invalid ird",
> > + [NVME_RDMA_CM_INVALID_ORD] = "Invalid ord",
> > +};
>
> I think it'd be better to move them to include/linux/nvme-rdma.h
> and use them for logging on the target side too.
>
You want to put this in nvme-rdma.h as-is so the memory for this is allocated in
each .c file that includes it?
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* Re: [PATCH v3 1/6] rdma_cm: add rdma_reject_msg() helper function
From: Christoph Hellwig @ 2016-10-25 17:00 UTC (permalink / raw)
To: Steve Wise
Cc: dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <ca2185d1f1e9008922d1b344f3887d400a1d6053.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
On Mon, Oct 24, 2016 at 11:59:03AM -0700, Steve Wise wrote:
> rdma_reject_msg() returns a pointer to a string message associated with
> the transport reject reason codes.
>
> Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
(and /me notes the difference in error numbers between iWarp and the IB
universe.. Stunning)
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^ permalink raw reply
* Re: [PATCH v3 2/6] rdma_cm: add rdma_is_consumer_reject() helper function
From: Christoph Hellwig @ 2016-10-25 17:00 UTC (permalink / raw)
To: Steve Wise
Cc: dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <66890f3b3abede2fe9fa658b91450c24ab516ed1.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
On Mon, Oct 24, 2016 at 11:59:03AM -0700, Steve Wise wrote:
> Return true if the peer consumer application rejected the
> connection attempt.
>
> Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
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* Re: [PATCH v3 3/6] rdma_cm: add rdma_consumer_reject_data helper function
From: Christoph Hellwig @ 2016-10-25 17:01 UTC (permalink / raw)
To: Steve Wise
Cc: dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <7690d653aefbf9ff51dfa6c1ebef57b47616be23.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
On Mon, Oct 24, 2016 at 11:59:03AM -0700, Steve Wise wrote:
> rdma_consumer_reject_data() will return the private data pointer
> and length if any is available.
>
> Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
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* Re: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Christoph Hellwig @ 2016-10-25 17:01 UTC (permalink / raw)
To: Steve Wise
Cc: dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <55638a1d2a9f79af8b9a19eb444c5d0a41691352.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
On Mon, Oct 24, 2016 at 12:07:13PM -0700, Steve Wise wrote:
> Also add nvme cm status strings and use them.
>
> Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Looks good,
Reviewed-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
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* Re: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Christoph Hellwig @ 2016-10-25 17:02 UTC (permalink / raw)
To: Sagi Grimberg
Cc: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, hch-jcswGhMUV9g,
axboe-b10kYP2dOMg, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <7191d136-aef4-9fed-223e-f2a9c1d958e5-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
On Tue, Oct 25, 2016 at 07:36:25PM +0300, Sagi Grimberg wrote:
> I think it'd be better to move them to include/linux/nvme-rdma.h
> and use them for logging on the target side too.
Hmm, that would mean they get compiled into every source file.
Also on the target side we can have free-form messages for whatever
the exact rejection reason was, no need to limit us to the enum.
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^ permalink raw reply
* Re: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Sagi Grimberg @ 2016-10-25 17:04 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w,
linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <20161025170238.GE9732-jcswGhMUV9g@public.gmane.org>
> On Tue, Oct 25, 2016 at 07:36:25PM +0300, Sagi Grimberg wrote:
>> I think it'd be better to move them to include/linux/nvme-rdma.h
>> and use them for logging on the target side too.
>
> Hmm, that would mean they get compiled into every source file.
"every source file" is exactly two...
> Also on the target side we can have free-form messages for whatever
> the exact rejection reason was, no need to limit us to the enum.
Thought it'd be nice to use the same verbosity on both ends, just a
suggestion though...
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* RE: RDMA_CM_EVENT_REJECTED
From: Hefty, Sean @ 2016-10-25 17:08 UTC (permalink / raw)
To: Steve Wise, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
In-Reply-To: <00c901d22ecd$79a9f300$6cfdd900$@opengridcomputing.com>
> While working on the reject helper functions, I notice that some of the
> rdma_cm
> kernel users have handlers for RDMA_CM_EVENT_REJECTED even for cm_ids
> that are
> spawned from listening cm_ids as the result of a
> RDMA_CM_EVENT_CONNECT_REQUEST,
> and that issue an rdma_accept() or rdma_reject() in response.
>
> Q: is it possible for a REJECTED event to get posted to these cm_ids?
> It is not
> for iWARP, but I'm not sure about IB. I'm guessing this is just due to
> cut/paste process of adding event handlers, but I wanted to make sure.
If I'm following this correctly, then, yes, I believe those cm_id's can be rejected. The active side of a connection can give up waiting for the passive side to act. As a final gesture, the active side will send a reject message to notify the passive side that it's aborting the connection request.
- Sean
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* Re: [PATCH v2 03/12] IB/hfi1: Fix an Oops on pci device force remove
From: Tadeusz Struk @ 2016-10-25 17:38 UTC (permalink / raw)
To: Jason Gunthorpe, Dennis Dalessandro
Cc: dledford-H+wXaHxf7aLQT0dZR+AlfA,
linux-rdma-u79uwXL29TY76Z2rM5mHXA, Dean Luick, Ira Weiny
In-Reply-To: <20161025164851.GA28096-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
On 10/25/2016 09:48 AM, Jason Gunthorpe wrote:
> nit: This isn't similar to uverbs or other IB core interfaces - they
> all allow unbind while the FD remains open, this forces the FD to
> become closed - which means hot plug will not be supported by hfi1.
>
That's correct, the reason, as I said before, is that PIO processes
don't go via FD, but talk directly to MMIO PCI regions.
> Otherwise this seems resonable.
Thanks for reviewing Jason.
Thanks,
--
TS
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^ permalink raw reply
* Re: [PATCH v3 1/6] rdma_cm: add rdma_reject_msg() helper function
From: Bart Van Assche @ 2016-10-25 17:58 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org,
hch-jcswGhMUV9g@public.gmane.org,
axboe-b10kYP2dOMg@public.gmane.org,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org
In-Reply-To: <ca2185d1f1e9008922d1b344f3887d400a1d6053.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
On 10/24/2016 12:09 PM, Steve Wise wrote:
> + [IB_CM_REJ_RDC_NOT_EXIST] = "rdc not exist",
Please change this into "RDC does not exist".
> + [IB_CM_REJ_INVALID_GID] = "invalid gid",
> + [IB_CM_REJ_INVALID_LID] = "invalid lid",
> + [IB_CM_REJ_INVALID_SL] = "invalid sl",
> + [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
> + [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
> + [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
> + [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt gid",
> + [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt lid",
> + [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt sl",
> + [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
> + [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
> + [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
> + [IB_CM_REJ_PORT_CM_REDIRECT] = "port cm redirect",
> + [IB_CM_REJ_PORT_REDIRECT] = "port redirect",
> + [IB_CM_REJ_INVALID_MTU] = "invalid mtu",
> + [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources",
> + [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
> + [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid rnr retry",
> + [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm id",
> + [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
> + [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
> + [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
Other error messages capitalize GID, LID, CM, ID, RNR and SL so please
do this here too.
> +const char *__attribute_const__ ibcm_reject_msg(int reason)
> +{
> + size_t index = reason;
> +
> + if (index >= ARRAY_SIZE(ibcm_rej_reason_strs) ||
> + !ibcm_rej_reason_strs[index])
> + return "unrecognized reason";
> + else
> + return ibcm_rej_reason_strs[index];
> +}
Please consider using positive logic - this means negating the
if-condition and swapping the if- and else-parts.
> +const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
> + int reason)
> +{
> + if (rdma_ib_or_roce(id->device, id->port_num))
> + return ibcm_reject_msg(reason);
> +
> + if (rdma_protocol_iwarp(id->device, id->port_num))
> + return iwcm_reject_msg(reason);
> +
> + WARN_ON_ONCE(1);
> + return "unrecognized reason";
Have you considered to return "unrecognized transport" here instead?
> +const char *__attribute_const__ iwcm_reject_msg(int reason)
> +{
> + size_t index;
> +
> + /* iWARP uses negative errnos */
> + index = -reason;
> +
> + if (index >= ARRAY_SIZE(iwcm_rej_reason_strs) ||
> + !iwcm_rej_reason_strs[index])
> + return "unrecognized reason";
> + else
> + return iwcm_rej_reason_strs[index];
> +}
Also for this function, please consider using positive logic.
Thanks,
Bart.
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* Re: [PATCH v2 03/12] IB/hfi1: Fix an Oops on pci device force remove
From: Jason Gunthorpe @ 2016-10-25 18:03 UTC (permalink / raw)
To: Tadeusz Struk
Cc: Dennis Dalessandro, dledford-H+wXaHxf7aLQT0dZR+AlfA,
linux-rdma-u79uwXL29TY76Z2rM5mHXA, Dean Luick, Ira Weiny
In-Reply-To: <7f4cbe0c-0c83-48b2-9901-4a5e27b306b4-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
On Tue, Oct 25, 2016 at 10:38:55AM -0700, Tadeusz Struk wrote:
> On 10/25/2016 09:48 AM, Jason Gunthorpe wrote:
> > nit: This isn't similar to uverbs or other IB core interfaces - they
> > all allow unbind while the FD remains open, this forces the FD to
> > become closed - which means hot plug will not be supported by hfi1.
> >
>
> That's correct, the reason, as I said before, is that PIO processes
> don't go via FD, but talk directly to MMIO PCI regions.
Most of the IB drivers do this - Mellanox implemented a forced
remapping of the user space VMA on unplug to deal with it, you can use
that technique in HFI1 too.
Jason
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* Re: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Bart Van Assche @ 2016-10-25 18:05 UTC (permalink / raw)
To: Steve Wise, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org,
hch-jcswGhMUV9g@public.gmane.org,
axboe-b10kYP2dOMg@public.gmane.org,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org
In-Reply-To: <55638a1d2a9f79af8b9a19eb444c5d0a41691352.1477336045.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
On 10/24/2016 12:09 PM, Steve Wise wrote:
> +static const char *const nvme_rdma_cm_status_strs[] = {
> + [NVME_RDMA_CM_INVALID_LEN] = "invalid length",
> + [NVME_RDMA_CM_INVALID_RECFMT] = "invalid record format",
> + [NVME_RDMA_CM_INVALID_QID] = "invalid queue id",
> + [NVME_RDMA_CM_INVALID_HSQSIZE] = "invalid host sq size",
> + [NVME_RDMA_CM_INVALID_HRQSIZE] = "invalid host rq size",
> + [NVME_RDMA_CM_NO_RSC] = "resource not found",
> + [NVME_RDMA_CM_INVALID_IRD] = "invalid ird",
> + [NVME_RDMA_CM_INVALID_ORD] = "Invalid ord",
> +};
Please capitalize abbreviations (SQ, RQ, ID, IRD and ORD).
> +static const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
> +{
> + size_t index = status;
> +
> + if (index >= ARRAY_SIZE(nvme_rdma_cm_status_strs) ||
> + !nvme_rdma_cm_status_strs[index])
> + return "unrecognized reason";
> + else
> + return nvme_rdma_cm_status_strs[index];
> +};
Please consider rewriting this if-statement such that the recognized
reason scenario occurs first.
> + rej_msg = rdma_reject_msg(cm_id, status);
> + rej_data = (struct nvme_rdma_cm_rej *)
> + rdma_consumer_reject_data(cm_id, ev, &rej_data_len);
Please reorder the patches in this patch series such that it doesn't
break a bisect. rdma_consumer_reject_data() should be introduced before
it is used.
Thanks,
Bart.
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^ permalink raw reply
* RE: [PATCH v3 1/6] rdma_cm: add rdma_reject_msg() helper function
From: Steve Wise @ 2016-10-25 18:18 UTC (permalink / raw)
To: 'Bart Van Assche', dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <93f8b8f8-51f5-a595-c9ad-0b3e22789636-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
> -----Original Message-----
> From: Bart Van Assche [mailto:bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org]
> Sent: Tuesday, October 25, 2016 12:58 PM
> To: Steve Wise; dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org; sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
> Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org;
> sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org; hch-jcswGhMUV9g@public.gmane.org; axboe-b10kYP2dOMg@public.gmane.org; santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org
> Subject: Re: [PATCH v3 1/6] rdma_cm: add rdma_reject_msg() helper function
>
> On 10/24/2016 12:09 PM, Steve Wise wrote:
> > + [IB_CM_REJ_RDC_NOT_EXIST] = "rdc not exist",
>
> Please change this into "RDC does not exist".
>
ok
> > + [IB_CM_REJ_INVALID_GID] = "invalid gid",
> > + [IB_CM_REJ_INVALID_LID] = "invalid lid",
> > + [IB_CM_REJ_INVALID_SL] = "invalid sl",
> > + [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
> > + [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
> > + [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
> > + [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt gid",
> > + [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt lid",
> > + [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt sl",
> > + [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
> > + [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
> > + [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
> > + [IB_CM_REJ_PORT_CM_REDIRECT] = "port cm redirect",
> > + [IB_CM_REJ_PORT_REDIRECT] = "port redirect",
> > + [IB_CM_REJ_INVALID_MTU] = "invalid mtu",
> > + [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp
> resources",
> > + [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
> > + [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid rnr retry",
> > + [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm
> id",
> > + [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
> > + [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
> > + [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
>
> Other error messages capitalize GID, LID, CM, ID, RNR and SL so please
> do this here too.
>
ok
> > +const char *__attribute_const__ ibcm_reject_msg(int reason)
> > +{
> > + size_t index = reason;
> > +
> > + if (index >= ARRAY_SIZE(ibcm_rej_reason_strs) ||
> > + !ibcm_rej_reason_strs[index])
> > + return "unrecognized reason";
> > + else
> > + return ibcm_rej_reason_strs[index];
> > +}
>
> Please consider using positive logic - this means negating the
> if-condition and swapping the if- and else-parts.
yea that might be even clearer.
>
> > +const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
> > + int reason)
> > +{
> > + if (rdma_ib_or_roce(id->device, id->port_num))
> > + return ibcm_reject_msg(reason);
> > +
> > + if (rdma_protocol_iwarp(id->device, id->port_num))
> > + return iwcm_reject_msg(reason);
> > +
> > + WARN_ON_ONCE(1);
> > + return "unrecognized reason";
>
> Have you considered to return "unrecognized transport" here instead?
>
I can do that.
> > +const char *__attribute_const__ iwcm_reject_msg(int reason)
> > +{
> > + size_t index;
> > +
> > + /* iWARP uses negative errnos */
> > + index = -reason;
> > +
> > + if (index >= ARRAY_SIZE(iwcm_rej_reason_strs) ||
> > + !iwcm_rej_reason_strs[index])
> > + return "unrecognized reason";
> > + else
> > + return iwcm_rej_reason_strs[index];
> > +}
>
> Also for this function, please consider using positive logic.
>
> Thanks,
>
> Bart.
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* RE: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Steve Wise @ 2016-10-25 18:20 UTC (permalink / raw)
To: 'Bart Van Assche', dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <b5d32deb-af6a-3f98-98da-c5f61d400876-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
>
> On 10/24/2016 12:09 PM, Steve Wise wrote:
> > +static const char *const nvme_rdma_cm_status_strs[] = {
> > + [NVME_RDMA_CM_INVALID_LEN] = "invalid length",
> > + [NVME_RDMA_CM_INVALID_RECFMT] = "invalid record format",
> > + [NVME_RDMA_CM_INVALID_QID] = "invalid queue id",
> > + [NVME_RDMA_CM_INVALID_HSQSIZE] = "invalid host sq size",
> > + [NVME_RDMA_CM_INVALID_HRQSIZE] = "invalid host rq size",
> > + [NVME_RDMA_CM_NO_RSC] = "resource not found",
> > + [NVME_RDMA_CM_INVALID_IRD] = "invalid ird",
> > + [NVME_RDMA_CM_INVALID_ORD] = "Invalid ord",
> > +};
>
> Please capitalize abbreviations (SQ, RQ, ID, IRD and ORD).
>
will do.
> > +static const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
> > +{
> > + size_t index = status;
> > +
> > + if (index >= ARRAY_SIZE(nvme_rdma_cm_status_strs) ||
> > + !nvme_rdma_cm_status_strs[index])
> > + return "unrecognized reason";
> > + else
> > + return nvme_rdma_cm_status_strs[index];
> > +};
>
> Please consider rewriting this if-statement such that the recognized
> reason scenario occurs first.
>
sure.
> > + rej_msg = rdma_reject_msg(cm_id, status);
> > + rej_data = (struct nvme_rdma_cm_rej *)
> > + rdma_consumer_reject_data(cm_id, ev, &rej_data_len);
>
> Please reorder the patches in this patch series such that it doesn't
> break a bisect. rdma_consumer_reject_data() should be introduced before
> it is used.
>
rdma_consumer_reject_data() is introduced in patch 3.
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^ permalink raw reply
* Re: [PATCH v3 4/6] nvme-rdma: use rdma connection reject helper functions
From: Bart Van Assche @ 2016-10-25 18:25 UTC (permalink / raw)
To: swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org,
dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
Cc: hch-jcswGhMUV9g@public.gmane.org,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
axboe-b10kYP2dOMg@public.gmane.org,
sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org
In-Reply-To: <014d01d22eec$832e60e0$898b22a0$@opengridcomputing.com>
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="utf-8", Size: 793 bytes --]
On Tue, 2016-10-25 at 13:20 -0500, Steve Wise wrote:
> >
> > On 10/24/2016 12:09 PM, Steve Wise wrote:
> > >
> > > + rej_msg = rdma_reject_msg(cm_id, status);
> > > + rej_data = (struct nvme_rdma_cm_rej *)
> > > + Â Â Â rdma_consumer_reject_data(cm_id, ev,
> > > &rej_data_len);
> >
> > Please reorder the patches in this patch series such that it
> > doesn't
> > break a bisect. rdma_consumer_reject_data() should be introduced
> > before
> > it is used.
>
> rdma_consumer_reject_data() is introduced in patch 3.
Hello Steve,
Thanks for the feedback. Apparently my e-mail client displayed the
patches in the wrong order ...
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^ permalink raw reply
* [PATCH v4 1/8] rdma_cm: add rdma_reject_msg() helper function
From: Steve Wise @ 2016-10-25 18:33 UTC (permalink / raw)
To: dledford-H+wXaHxf7aLQT0dZR+AlfA,
sean.hefty-ral2JQCrhuEAvxtiuMwx3w
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA,
bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ,
linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
sagi-NQWnxTmZq1alnMjI0IkVqw, hch-jcswGhMUV9g, axboe-b10kYP2dOMg,
santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA
In-Reply-To: <cover.1477426743.git.swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
rdma_reject_msg() returns a pointer to a string message associated with
the transport reject reason codes.
Reviewed-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Reviewed-by: Sagi Grimberg <sagi-egDjqUIXVlxBDLzU/O5InQ@public.gmane.org>
Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
---
drivers/infiniband/core/cm.c | 48 ++++++++++++++++++++++++++++++++++++++++++
drivers/infiniband/core/cma.c | 14 ++++++++++++
drivers/infiniband/core/iwcm.c | 21 ++++++++++++++++++
include/rdma/ib_cm.h | 6 ++++++
include/rdma/iw_cm.h | 6 ++++++
include/rdma/rdma_cm.h | 8 +++++++
6 files changed, 103 insertions(+)
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index c995255..6c64d0c 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -57,6 +57,54 @@ MODULE_AUTHOR("Sean Hefty");
MODULE_DESCRIPTION("InfiniBand CM");
MODULE_LICENSE("Dual BSD/GPL");
+static const char * const ibcm_rej_reason_strs[] = {
+ [IB_CM_REJ_NO_QP] = "no QP",
+ [IB_CM_REJ_NO_EEC] = "no EEC",
+ [IB_CM_REJ_NO_RESOURCES] = "no resources",
+ [IB_CM_REJ_TIMEOUT] = "timeout",
+ [IB_CM_REJ_UNSUPPORTED] = "unsupported",
+ [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID",
+ [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance",
+ [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID",
+ [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type",
+ [IB_CM_REJ_STALE_CONN] = "stale conn",
+ [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist",
+ [IB_CM_REJ_INVALID_GID] = "invalid GID",
+ [IB_CM_REJ_INVALID_LID] = "invalid LID",
+ [IB_CM_REJ_INVALID_SL] = "invalid SL",
+ [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
+ [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
+ [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
+ [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID",
+ [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID",
+ [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL",
+ [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
+ [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
+ [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
+ [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect",
+ [IB_CM_REJ_PORT_REDIRECT] = "port redirect",
+ [IB_CM_REJ_INVALID_MTU] = "invalid MTU",
+ [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources",
+ [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
+ [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry",
+ [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID",
+ [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
+ [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
+ [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
+};
+
+const char *__attribute_const__ ibcm_reject_msg(int reason)
+{
+ size_t index = reason;
+
+ if (index < ARRAY_SIZE(ibcm_rej_reason_strs) &&
+ ibcm_rej_reason_strs[index])
+ return ibcm_rej_reason_strs[index];
+ else
+ return "unrecognized reason";
+}
+EXPORT_SYMBOL(ibcm_reject_msg);
+
static void cm_add_one(struct ib_device *device);
static void cm_remove_one(struct ib_device *device, void *client_data);
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 5f65a78..427f74e 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -101,6 +101,20 @@ const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
}
EXPORT_SYMBOL(rdma_event_msg);
+const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
+ int reason)
+{
+ if (rdma_ib_or_roce(id->device, id->port_num))
+ return ibcm_reject_msg(reason);
+
+ if (rdma_protocol_iwarp(id->device, id->port_num))
+ return iwcm_reject_msg(reason);
+
+ WARN_ON_ONCE(1);
+ return "unrecognized transport";
+}
+EXPORT_SYMBOL(rdma_reject_msg);
+
static void cma_add_one(struct ib_device *device);
static void cma_remove_one(struct ib_device *device, void *client_data);
diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c
index 357624f..c8721c54 100644
--- a/drivers/infiniband/core/iwcm.c
+++ b/drivers/infiniband/core/iwcm.c
@@ -59,6 +59,27 @@ MODULE_AUTHOR("Tom Tucker");
MODULE_DESCRIPTION("iWARP CM");
MODULE_LICENSE("Dual BSD/GPL");
+static const char * const iwcm_rej_reason_strs[] = {
+ [ECONNRESET] = "reset by remote host",
+ [ECONNREFUSED] = "refused by remote application",
+ [ETIMEDOUT] = "setup timeout",
+};
+
+const char *__attribute_const__ iwcm_reject_msg(int reason)
+{
+ size_t index;
+
+ /* iWARP uses negative errnos */
+ index = -reason;
+
+ if (index < ARRAY_SIZE(iwcm_rej_reason_strs) &&
+ iwcm_rej_reason_strs[index])
+ return iwcm_rej_reason_strs[index];
+ else
+ return "unrecognized reason";
+}
+EXPORT_SYMBOL(iwcm_reject_msg);
+
static struct ibnl_client_cbs iwcm_nl_cb_table[] = {
[RDMA_NL_IWPM_REG_PID] = {.dump = iwpm_register_pid_cb},
[RDMA_NL_IWPM_ADD_MAPPING] = {.dump = iwpm_add_mapping_cb},
diff --git a/include/rdma/ib_cm.h b/include/rdma/ib_cm.h
index 92a7d85..b49258b 100644
--- a/include/rdma/ib_cm.h
+++ b/include/rdma/ib_cm.h
@@ -603,4 +603,10 @@ struct ib_cm_sidr_rep_param {
int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
struct ib_cm_sidr_rep_param *param);
+/**
+ * ibcm_reject_msg - return a pointer to a reject message string.
+ * @reason: Value returned in the REJECT event status field.
+ */
+const char *__attribute_const__ ibcm_reject_msg(int reason);
+
#endif /* IB_CM_H */
diff --git a/include/rdma/iw_cm.h b/include/rdma/iw_cm.h
index 6d0065c..5cd7701 100644
--- a/include/rdma/iw_cm.h
+++ b/include/rdma/iw_cm.h
@@ -253,4 +253,10 @@ int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
int *qp_attr_mask);
+/**
+ * iwcm_reject_msg - return a pointer to a reject message string.
+ * @reason: Value returned in the REJECT event status field.
+ */
+const char *__attribute_const__ iwcm_reject_msg(int reason);
+
#endif /* IW_CM_H */
diff --git a/include/rdma/rdma_cm.h b/include/rdma/rdma_cm.h
index 81fb1d1..f11a768 100644
--- a/include/rdma/rdma_cm.h
+++ b/include/rdma/rdma_cm.h
@@ -388,4 +388,12 @@ int rdma_set_afonly(struct rdma_cm_id *id, int afonly);
*/
__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr);
+/**
+ * rdma_reject_msg - return a pointer to a reject message string.
+ * @id: Communication identifier that received the REJECT event.
+ * @reason: Value returned in the REJECT event status field.
+ */
+const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
+ int reason);
+
#endif /* RDMA_CM_H */
--
2.7.0
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