netdev - [net-next][PATCH 2/2] rds: add sysctl for rds support of On-Demand-Paging

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1556239470-26908-3-git-send-email-santosh.shilimkar@oracle.com>
Date:   Thu, 25 Apr 2019 17:44:30 -0700
From:   Santosh Shilimkar <santosh.shilimkar@...cle.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     santosh.shilimkar@...cle.com
Subject: [net-next][PATCH 2/2] rds: add sysctl for rds support of On-Demand-Paging

RDS doesn't support RDMA on memory apertures that require On Demand
Paging (ODP), such as FS DAX memory. A sysctl is added to indicate
whether RDMA requiring ODP is supported.

Reviewed-by: Håkon Bugge <haakon.bugge@...cle.com>
Reviewed-tested-by: Zhu Yanjun <yanjun.zhu@...cle.com>
Signed-off-by: Hans Westgaard Ry <hans.westgaard.ry@...cle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>
---
 net/rds/ib.h        | 1 +
 net/rds/ib_sysctl.c | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/net/rds/ib.h b/net/rds/ib.h
index 67a715b..80e11ef 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -457,5 +457,6 @@ unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
 extern unsigned long rds_ib_sysctl_max_unsig_bytes;
 extern unsigned long rds_ib_sysctl_max_recv_allocation;
 extern unsigned int rds_ib_sysctl_flow_control;
+extern unsigned int rds_ib_sysctl_odp_support;
 
 #endif
diff --git a/net/rds/ib_sysctl.c b/net/rds/ib_sysctl.c
index e4e41b3..7cc02cd 100644
--- a/net/rds/ib_sysctl.c
+++ b/net/rds/ib_sysctl.c
@@ -60,6 +60,7 @@
  * will cause credits to be added before protocol negotiation.
  */
 unsigned int rds_ib_sysctl_flow_control = 0;
+unsigned int rds_ib_sysctl_odp_support;
 
 static struct ctl_table rds_ib_sysctl_table[] = {
 	{
@@ -103,6 +104,13 @@
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
+	{
+		.procname       = "odp_support",
+		.data           = &rds_ib_sysctl_odp_support,
+		.maxlen         = sizeof(rds_ib_sysctl_odp_support),
+		.mode           = 0444,
+		.proc_handler   = proc_dointvec,
+	},
 	{ }
 };
 
-- 
1.9.1