[PATCH for-next v3 0/3] RDMA/rtrs: bugfix and cleanups

[PATCH for-next v3 0/3] RDMA/rtrs: bugfix and cleanups

[Li Zhijian]

V3:
 - minor comments fixes and add tags

V2:
- Add new patch2 to fix a memory leak
- rewrite original patch2 to patch3 by refactoring the cleanup path instead of
  introducing a new flag
- Drop original patch3: RDMA/rtrs: Fix use-after-free in rtrs_clt_rdma_cm_handler
  The problem it tried to addressing doesn't appear after the new patch3
  where it adjust the cleanup order

It's trying to fix 1 issue triggered by the following script which
connect/disconnect rnbd frequently.

# cat rnbd-self.sh 
#!/bin/bash

/root/rpma/tools/config_softroce.sh eth0
modprobe rnbd_server
modprobe rnbd_client

while true;
do
        echo "sessname=xyz path=ip:<server-ip> device_path=/dev/nvme0n1" > /sys/devices/virtual/rnbd-client/ctl/map_device
        for i in /sys/block/rnbd*/rnbd/unmap_device
        do
                echo "normal" > $i
        done
done

Li Zhijian (3):
  RDMA/rtrs: remove duplicate cq_num assignment
  RDMA/rtrs: Fix the last iu->buf leak in err path
  RDMA/rtrs: Fix rxe_dealloc_pd warning

 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 56 +++++++++++---------------
 drivers/infiniband/ulp/rtrs/rtrs.c     |  4 +-
 2 files changed, 26 insertions(+), 34 deletions(-)

-- 
2.29.2

[PATCH for-next v3 1/3] RDMA/rtrs: remove duplicate cq_num assignment

[Li Zhijian]

line 1701 and 1713 are duplicate:
> 1701         cq_num = max_send_wr + max_recv_wr;
 1702         /* alloc iu to recv new rkey reply when server reports flags set */
 1703         if (clt_path->flags & RTRS_MSG_NEW_RKEY_F || con->c.cid == 0) {
 1704                 con->rsp_ius = rtrs_iu_alloc(cq_num, sizeof(*rsp),
 1705                                               GFP_KERNEL,
 1706                                               clt_path->s.dev->ib_dev,
 1707                                               DMA_FROM_DEVICE,
 1708                                               rtrs_clt_rdma_done);
 1709                 if (!con->rsp_ius)
 1710                         return -ENOMEM;
 1711                 con->queue_num = cq_num;
 1712         }
> 1713         cq_num = max_send_wr + max_recv_wr;

Acked-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
V2: Add acked-by tags
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index 80abf45a197a..c2065fc33a56 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -1710,7 +1710,6 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
 			return -ENOMEM;
 		con->queue_num = cq_num;
 	}
-	cq_num = max_send_wr + max_recv_wr;
 	cq_vector = con->cpu % clt_path->s.dev->ib_dev->num_comp_vectors;
 	if (con->c.cid >= clt_path->s.irq_con_num)
 		err = rtrs_cq_qp_create(&clt_path->s, &con->c, max_send_sge,
-- 
2.29.2

[PATCH for-next v3 2/3] RDMA/rtrs: Fix the last iu->buf leak in err path

[Li Zhijian]

The last iu->buf will leak if ib_dma_mapping_error() fails.

Fixes: c0894b3ea69d ("RDMA/rtrs: core: lib functions shared between client and server modules")
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Acked-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
---
V3: add fixes and acked tags
V2: new patch to address memory leaking
---
 drivers/infiniband/ulp/rtrs/rtrs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
index 4bf9d868cc52..3696f367ff51 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs.c
@@ -37,8 +37,10 @@ struct rtrs_iu *rtrs_iu_alloc(u32 iu_num, size_t size, gfp_t gfp_mask,
 			goto err;
 
 		iu->dma_addr = ib_dma_map_single(dma_dev, iu->buf, size, dir);
-		if (ib_dma_mapping_error(dma_dev, iu->dma_addr))
+		if (ib_dma_mapping_error(dma_dev, iu->dma_addr)) {
+			kfree(iu->buf);
 			goto err;
+		}
 
 		iu->cqe.done  = done;
 		iu->size      = size;
-- 
2.29.2

[PATCH for-next v3 3/3] RDMA/rtrs: Fix rxe_dealloc_pd warning

[Li Zhijian]

In current design:
1. PD and clt_path->s.dev are shared among connections.
2. every con[n]'s cleanup phase will call destroy_con_cq_qp()
3. clt_path->s.dev will be always decreased in destroy_con_cq_qp(), and
   when clt_path->s.dev become zero, it will destroy PD.
4. when con[1] failed to create, con[1] will not take clt_path->s.dev,
   but it try to decreased clt_path->s.dev

So, in case create_cm(con[0]) succeeds but create_cm(con[1])
fails, destroy_con_cq_qp(con[1]) will be called first which will destory
the PD while this PD is still taken by con[0].

Here, we refactor the error path of create_cm() and init_conns(), so that
we do the cleanup in the order they are created.

The warning occurs when destroying RXE PD whose reference count is not
zero.
-----------------------------------------------
 rnbd_client L597: Mapping device /dev/nvme0n1 on session client, (access_mode: rw, nr_poll_queues: 0)
 ------------[ cut here ]------------
 WARNING: CPU: 0 PID: 26407 at drivers/infiniband/sw/rxe/rxe_pool.c:256 __rxe_cleanup+0x13a/0x170 [rdma_rxe]
 Modules linked in: rpcrdma rdma_ucm ib_iser rnbd_client libiscsi rtrs_client scsi_transport_iscsi rtrs_core rdma_cm iw_cm ib_cm crc32_generic rdma_rxe udp_tunnel ib_uverbs ib_core kmem device_dax nd_pmem dax_pmem nd_
vme crc32c_intel fuse nvme_core nfit libnvdimm dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua dm_mirror dm_region_hash dm_log dm_mod
 CPU: 0 PID: 26407 Comm: rnbd-client.sh Kdump: loaded Not tainted 6.2.0-rc6-roce-flush+ #53
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
 RIP: 0010:__rxe_cleanup+0x13a/0x170 [rdma_rxe]
 Code: 45 84 e4 0f 84 5a ff ff ff 48 89 ef e8 5f 18 71 f9 84 c0 75 90 be c8 00 00 00 48 89 ef e8 be 89 1f fa 85 c0 0f 85 7b ff ff ff <0f> 0b 41 bc ea ff ff ff e9 71 ff ff ff e8 84 7f 1f fa e9 d0 fe ff
 RSP: 0018:ffffb09880b6f5f0 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: ffff99401f15d6a8 RCX: 0000000000000000
 RDX: 0000000000000001 RSI: ffffffffbac8234b RDI: 00000000ffffffff
 RBP: ffff99401f15d6d0 R08: 0000000000000001 R09: 0000000000000001
 R10: 0000000000002d82 R11: 0000000000000000 R12: 0000000000000001
 R13: ffff994101eff208 R14: ffffb09880b6f6a0 R15: 00000000fffffe00
 FS:  00007fe113904740(0000) GS:ffff99413bc00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00007ff6cde656c8 CR3: 000000001f108004 CR4: 00000000001706f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 Call Trace:
  <TASK>
  rxe_dealloc_pd+0x16/0x20 [rdma_rxe]
  ib_dealloc_pd_user+0x4b/0x80 [ib_core]
  rtrs_ib_dev_put+0x79/0xd0 [rtrs_core]
  destroy_con_cq_qp+0x8a/0xa0 [rtrs_client]
  init_path+0x1e7/0x9a0 [rtrs_client]
  ? __pfx_autoremove_wake_function+0x10/0x10
  ? lock_is_held_type+0xd7/0x130
  ? rcu_read_lock_sched_held+0x43/0x80
  ? pcpu_alloc+0x3dd/0x7d0
  ? rtrs_clt_init_stats+0x18/0x40 [rtrs_client]
  rtrs_clt_open+0x24f/0x5a0 [rtrs_client]
  ? __pfx_rnbd_clt_link_ev+0x10/0x10 [rnbd_client]
  rnbd_clt_map_device+0x6a5/0xe10 [rnbd_client]

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Tested-by: Jack Wang <jinpu.wang@ionos.com>
---
V3: comment minor fixes and add acked/tested tags
V2: refactor error path instead of introducing a new flag #Leon
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 55 +++++++++++---------------
 1 file changed, 23 insertions(+), 32 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index c2065fc33a56..fe3507d29728 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -2039,6 +2039,7 @@ static int rtrs_clt_rdma_cm_handler(struct rdma_cm_id *cm_id,
 	return 0;
 }
 
+/* The caller should do the cleanup in case of error */
 static int create_cm(struct rtrs_clt_con *con)
 {
 	struct rtrs_path *s = con->c.path;
@@ -2061,14 +2062,14 @@ static int create_cm(struct rtrs_clt_con *con)
 	err = rdma_set_reuseaddr(cm_id, 1);
 	if (err != 0) {
 		rtrs_err(s, "Set address reuse failed, err: %d\n", err);
-		goto destroy_cm;
+		return err;
 	}
 	err = rdma_resolve_addr(cm_id, (struct sockaddr *)&clt_path->s.src_addr,
 				(struct sockaddr *)&clt_path->s.dst_addr,
 				RTRS_CONNECT_TIMEOUT_MS);
 	if (err) {
 		rtrs_err(s, "Failed to resolve address, err: %d\n", err);
-		goto destroy_cm;
+		return err;
 	}
 	/*
 	 * Combine connection status and session events. This is needed
@@ -2083,29 +2084,15 @@ static int create_cm(struct rtrs_clt_con *con)
 		if (err == 0)
 			err = -ETIMEDOUT;
 		/* Timedout or interrupted */
-		goto errr;
-	}
-	if (con->cm_err < 0) {
-		err = con->cm_err;
-		goto errr;
+		return err;
 	}
-	if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTING) {
+	if (con->cm_err < 0)
+		return con->cm_err;
+	if (READ_ONCE(clt_path->state) != RTRS_CLT_CONNECTING)
 		/* Device removal */
-		err = -ECONNABORTED;
-		goto errr;
-	}
+		return -ECONNABORTED;
 
 	return 0;
-
-errr:
-	stop_cm(con);
-	mutex_lock(&con->con_mutex);
-	destroy_con_cq_qp(con);
-	mutex_unlock(&con->con_mutex);
-destroy_cm:
-	destroy_cm(con);
-
-	return err;
 }
 
 static void rtrs_clt_path_up(struct rtrs_clt_path *clt_path)
@@ -2333,7 +2320,7 @@ static void rtrs_clt_close_work(struct work_struct *work)
 static int init_conns(struct rtrs_clt_path *clt_path)
 {
 	unsigned int cid;
-	int err;
+	int err, i;
 
 	/*
 	 * On every new session connections increase reconnect counter
@@ -2349,10 +2336,8 @@ static int init_conns(struct rtrs_clt_path *clt_path)
 			goto destroy;
 
 		err = create_cm(to_clt_con(clt_path->s.con[cid]));
-		if (err) {
-			destroy_con(to_clt_con(clt_path->s.con[cid]));
+		if (err)
 			goto destroy;
-		}
 	}
 	err = alloc_path_reqs(clt_path);
 	if (err)
@@ -2363,15 +2348,21 @@ static int init_conns(struct rtrs_clt_path *clt_path)
 	return 0;
 
 destroy:
-	while (cid--) {
-		struct rtrs_clt_con *con = to_clt_con(clt_path->s.con[cid]);
+	/* Make sure we do the cleanup in the order they are created */
+	for (i = 0; i <= cid; i++) {
+		struct rtrs_clt_con *con;
 
-		stop_cm(con);
+		if (!clt_path->s.con[i])
+			break;
 
-		mutex_lock(&con->con_mutex);
-		destroy_con_cq_qp(con);
-		mutex_unlock(&con->con_mutex);
-		destroy_cm(con);
+		con = to_clt_con(clt_path->s.con[i]);
+		if (con->c.cm_id) {
+			stop_cm(con);
+			mutex_lock(&con->con_mutex);
+			destroy_con_cq_qp(con);
+			mutex_unlock(&con->con_mutex);
+			destroy_cm(con);
+		}
 		destroy_con(con);
 	}
 	/*
-- 
2.29.2

Re: [PATCH for-next v3 3/3] RDMA/rtrs: Fix rxe_dealloc_pd warning

[Jason Gunthorpe]

On Tue, Apr 25, 2023 at 01:02:43AM +0000, Li Zhijian wrote:
> In current design:
> 1. PD and clt_path->s.dev are shared among connections.
> 2. every con[n]'s cleanup phase will call destroy_con_cq_qp()
> 3. clt_path->s.dev will be always decreased in destroy_con_cq_qp(), and
>    when clt_path->s.dev become zero, it will destroy PD.
> 4. when con[1] failed to create, con[1] will not take clt_path->s.dev,
>    but it try to decreased clt_path->s.dev
> 
> So, in case create_cm(con[0]) succeeds but create_cm(con[1])
> fails, destroy_con_cq_qp(con[1]) will be called first which will destory
> the PD while this PD is still taken by con[0].
> 
> Here, we refactor the error path of create_cm() and init_conns(), so that
> we do the cleanup in the order they are created.
> 
> The warning occurs when destroying RXE PD whose reference count is not
> zero.
> -----------------------------------------------
>  rnbd_client L597: Mapping device /dev/nvme0n1 on session client, (access_mode: rw, nr_poll_queues: 0)
>  ------------[ cut here ]------------
>  WARNING: CPU: 0 PID: 26407 at drivers/infiniband/sw/rxe/rxe_pool.c:256 __rxe_cleanup+0x13a/0x170 [rdma_rxe]
>  Modules linked in: rpcrdma rdma_ucm ib_iser rnbd_client libiscsi rtrs_client scsi_transport_iscsi rtrs_core rdma_cm iw_cm ib_cm crc32_generic rdma_rxe udp_tunnel ib_uverbs ib_core kmem device_dax nd_pmem dax_pmem nd_
> vme crc32c_intel fuse nvme_core nfit libnvdimm dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua dm_mirror dm_region_hash dm_log dm_mod
>  CPU: 0 PID: 26407 Comm: rnbd-client.sh Kdump: loaded Not tainted 6.2.0-rc6-roce-flush+ #53
>  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
>  RIP: 0010:__rxe_cleanup+0x13a/0x170 [rdma_rxe]
>  Code: 45 84 e4 0f 84 5a ff ff ff 48 89 ef e8 5f 18 71 f9 84 c0 75 90 be c8 00 00 00 48 89 ef e8 be 89 1f fa 85 c0 0f 85 7b ff ff ff <0f> 0b 41 bc ea ff ff ff e9 71 ff ff ff e8 84 7f 1f fa e9 d0 fe ff
>  RSP: 0018:ffffb09880b6f5f0 EFLAGS: 00010246
>  RAX: 0000000000000000 RBX: ffff99401f15d6a8 RCX: 0000000000000000
>  RDX: 0000000000000001 RSI: ffffffffbac8234b RDI: 00000000ffffffff
>  RBP: ffff99401f15d6d0 R08: 0000000000000001 R09: 0000000000000001
>  R10: 0000000000002d82 R11: 0000000000000000 R12: 0000000000000001
>  R13: ffff994101eff208 R14: ffffb09880b6f6a0 R15: 00000000fffffe00
>  FS:  00007fe113904740(0000) GS:ffff99413bc00000(0000) knlGS:0000000000000000
>  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>  CR2: 00007ff6cde656c8 CR3: 000000001f108004 CR4: 00000000001706f0
>  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>  Call Trace:
>   <TASK>
>   rxe_dealloc_pd+0x16/0x20 [rdma_rxe]
>   ib_dealloc_pd_user+0x4b/0x80 [ib_core]
>   rtrs_ib_dev_put+0x79/0xd0 [rtrs_core]
>   destroy_con_cq_qp+0x8a/0xa0 [rtrs_client]
>   init_path+0x1e7/0x9a0 [rtrs_client]
>   ? __pfx_autoremove_wake_function+0x10/0x10
>   ? lock_is_held_type+0xd7/0x130
>   ? rcu_read_lock_sched_held+0x43/0x80
>   ? pcpu_alloc+0x3dd/0x7d0
>   ? rtrs_clt_init_stats+0x18/0x40 [rtrs_client]
>   rtrs_clt_open+0x24f/0x5a0 [rtrs_client]
>   ? __pfx_rnbd_clt_link_ev+0x10/0x10 [rnbd_client]
>   rnbd_clt_map_device+0x6a5/0xe10 [rnbd_client]
> 
> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
> Acked-by: Jack Wang <jinpu.wang@ionos.com>
> Tested-by: Jack Wang <jinpu.wang@ionos.com>

It would be good to have a fixes line for this?

Jason

Re: [PATCH for-next v3 3/3] RDMA/rtrs: Fix rxe_dealloc_pd warning

[Jinpu Wang]

On Thu, Jun 1, 2023 at 7:33 PM Jason Gunthorpe <jgg@nvidia.com> wrote:
>
> On Tue, Apr 25, 2023 at 01:02:43AM +0000, Li Zhijian wrote:
> > In current design:
> > 1. PD and clt_path->s.dev are shared among connections.
> > 2. every con[n]'s cleanup phase will call destroy_con_cq_qp()
> > 3. clt_path->s.dev will be always decreased in destroy_con_cq_qp(), and
> >    when clt_path->s.dev become zero, it will destroy PD.
> > 4. when con[1] failed to create, con[1] will not take clt_path->s.dev,
> >    but it try to decreased clt_path->s.dev
> >
> > So, in case create_cm(con[0]) succeeds but create_cm(con[1])
> > fails, destroy_con_cq_qp(con[1]) will be called first which will destory
> > the PD while this PD is still taken by con[0].
> >
> > Here, we refactor the error path of create_cm() and init_conns(), so that
> > we do the cleanup in the order they are created.
> >
> > The warning occurs when destroying RXE PD whose reference count is not
> > zero.
> > -----------------------------------------------
> >  rnbd_client L597: Mapping device /dev/nvme0n1 on session client, (access_mode: rw, nr_poll_queues: 0)
> >  ------------[ cut here ]------------
> >  WARNING: CPU: 0 PID: 26407 at drivers/infiniband/sw/rxe/rxe_pool.c:256 __rxe_cleanup+0x13a/0x170 [rdma_rxe]
> >  Modules linked in: rpcrdma rdma_ucm ib_iser rnbd_client libiscsi rtrs_client scsi_transport_iscsi rtrs_core rdma_cm iw_cm ib_cm crc32_generic rdma_rxe udp_tunnel ib_uverbs ib_core kmem device_dax nd_pmem dax_pmem nd_
> > vme crc32c_intel fuse nvme_core nfit libnvdimm dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua dm_mirror dm_region_hash dm_log dm_mod
> >  CPU: 0 PID: 26407 Comm: rnbd-client.sh Kdump: loaded Not tainted 6.2.0-rc6-roce-flush+ #53
> >  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
> >  RIP: 0010:__rxe_cleanup+0x13a/0x170 [rdma_rxe]
> >  Code: 45 84 e4 0f 84 5a ff ff ff 48 89 ef e8 5f 18 71 f9 84 c0 75 90 be c8 00 00 00 48 89 ef e8 be 89 1f fa 85 c0 0f 85 7b ff ff ff <0f> 0b 41 bc ea ff ff ff e9 71 ff ff ff e8 84 7f 1f fa e9 d0 fe ff
> >  RSP: 0018:ffffb09880b6f5f0 EFLAGS: 00010246
> >  RAX: 0000000000000000 RBX: ffff99401f15d6a8 RCX: 0000000000000000
> >  RDX: 0000000000000001 RSI: ffffffffbac8234b RDI: 00000000ffffffff
> >  RBP: ffff99401f15d6d0 R08: 0000000000000001 R09: 0000000000000001
> >  R10: 0000000000002d82 R11: 0000000000000000 R12: 0000000000000001
> >  R13: ffff994101eff208 R14: ffffb09880b6f6a0 R15: 00000000fffffe00
> >  FS:  00007fe113904740(0000) GS:ffff99413bc00000(0000) knlGS:0000000000000000
> >  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> >  CR2: 00007ff6cde656c8 CR3: 000000001f108004 CR4: 00000000001706f0
> >  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> >  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> >  Call Trace:
> >   <TASK>
> >   rxe_dealloc_pd+0x16/0x20 [rdma_rxe]
> >   ib_dealloc_pd_user+0x4b/0x80 [ib_core]
> >   rtrs_ib_dev_put+0x79/0xd0 [rtrs_core]
> >   destroy_con_cq_qp+0x8a/0xa0 [rtrs_client]
> >   init_path+0x1e7/0x9a0 [rtrs_client]
> >   ? __pfx_autoremove_wake_function+0x10/0x10
> >   ? lock_is_held_type+0xd7/0x130
> >   ? rcu_read_lock_sched_held+0x43/0x80
> >   ? pcpu_alloc+0x3dd/0x7d0
> >   ? rtrs_clt_init_stats+0x18/0x40 [rtrs_client]
> >   rtrs_clt_open+0x24f/0x5a0 [rtrs_client]
> >   ? __pfx_rnbd_clt_link_ev+0x10/0x10 [rnbd_client]
> >   rnbd_clt_map_device+0x6a5/0xe10 [rnbd_client]
> >
> > Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
> > Acked-by: Jack Wang <jinpu.wang@ionos.com>
> > Tested-by: Jack Wang <jinpu.wang@ionos.com>
>
> It would be good to have a fixes line for this?
It should be:
 Fixes: 6a98d71daea1 ("RDMA/rtrs: client: main functionality")

Could you amend it  to the commit?
>
> Jason
Thx!

Re: [PATCH for-next v3 0/3] RDMA/rtrs: bugfix and cleanups

[Zhijian Li (Fujitsu)]

ping


On 25/04/2023 09:02, Li Zhijian wrote:
> V3:
>   - minor comments fixes and add tags
> 
> V2:
> - Add new patch2 to fix a memory leak
> - rewrite original patch2 to patch3 by refactoring the cleanup path instead of
>    introducing a new flag
> - Drop original patch3: RDMA/rtrs: Fix use-after-free in rtrs_clt_rdma_cm_handler
>    The problem it tried to addressing doesn't appear after the new patch3
>    where it adjust the cleanup order
> 
> It's trying to fix 1 issue triggered by the following script which
> connect/disconnect rnbd frequently.
> 
> # cat rnbd-self.sh
> #!/bin/bash
> 
> /root/rpma/tools/config_softroce.sh eth0
> modprobe rnbd_server
> modprobe rnbd_client
> 
> while true;
> do
>          echo "sessname=xyz path=ip:<server-ip> device_path=/dev/nvme0n1" > /sys/devices/virtual/rnbd-client/ctl/map_device
>          for i in /sys/block/rnbd*/rnbd/unmap_device
>          do
>                  echo "normal" > $i
>          done
> done
> 
> Li Zhijian (3):
>    RDMA/rtrs: remove duplicate cq_num assignment
>    RDMA/rtrs: Fix the last iu->buf leak in err path
>    RDMA/rtrs: Fix rxe_dealloc_pd warning
> 
>   drivers/infiniband/ulp/rtrs/rtrs-clt.c | 56 +++++++++++---------------
>   drivers/infiniband/ulp/rtrs/rtrs.c     |  4 +-
>   2 files changed, 26 insertions(+), 34 deletions(-)
> 

Re: [PATCH for-next v3 0/3] RDMA/rtrs: bugfix and cleanups

[Leon Romanovsky]

On Tue, May 09, 2023 at 01:20:09AM +0000, Zhijian Li (Fujitsu) wrote:
> ping

There is no need to ping, -rc1 was opened yesterday only.

Thanks

Re: [PATCH for-next v3 0/3] RDMA/rtrs: bugfix and cleanups

[Jason Gunthorpe]

On Tue, Apr 25, 2023 at 01:02:40AM +0000, Li Zhijian wrote:
> V3:
>  - minor comments fixes and add tags
> 
> V2:
> - Add new patch2 to fix a memory leak
> - rewrite original patch2 to patch3 by refactoring the cleanup path instead of
>   introducing a new flag
> - Drop original patch3: RDMA/rtrs: Fix use-after-free in rtrs_clt_rdma_cm_handler
>   The problem it tried to addressing doesn't appear after the new patch3
>   where it adjust the cleanup order
> 
> It's trying to fix 1 issue triggered by the following script which
> connect/disconnect rnbd frequently.
> 
> # cat rnbd-self.sh 
> #!/bin/bash
> 
> /root/rpma/tools/config_softroce.sh eth0
> modprobe rnbd_server
> modprobe rnbd_client
> 
> while true;
> do
>         echo "sessname=xyz path=ip:<server-ip> device_path=/dev/nvme0n1" > /sys/devices/virtual/rnbd-client/ctl/map_device
>         for i in /sys/block/rnbd*/rnbd/unmap_device
>         do
>                 echo "normal" > $i
>         done
> done
> 
> Li Zhijian (3):
>   RDMA/rtrs: remove duplicate cq_num assignment

I took this to for-next

>   RDMA/rtrs: Fix the last iu->buf leak in err path
>   RDMA/rtrs: Fix rxe_dealloc_pd warning

And these to for-rc

Thanks,
Jason