All of lore.kernel.org
 help / color / mirror / Atom feed
From: Olga Kornievskaia <olga.kornievskaia@gmail.com>
To: trond.myklebust@hammerspace.com, anna.schumaker@netapp.com
Cc: linux-nfs@vger.kernel.org
Subject: [PATCH v10 05/13] sunrpc: add IDs to multipath
Date: Tue,  8 Jun 2021 15:59:14 -0400	[thread overview]
Message-ID: <20210608195922.88655-6-olga.kornievskaia@gmail.com> (raw)
In-Reply-To: <20210608195922.88655-1-olga.kornievskaia@gmail.com>

From: Olga Kornievskaia <kolga@netapp.com>

This is used to uniquely identify sunrpc multipath objects in /sys.

Signed-off-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 include/linux/sunrpc/xprtmultipath.h |  4 ++++
 net/sunrpc/sunrpc_syms.c             |  1 +
 net/sunrpc/xprtmultipath.c           | 26 ++++++++++++++++++++++++++
 3 files changed, 31 insertions(+)

diff --git a/include/linux/sunrpc/xprtmultipath.h b/include/linux/sunrpc/xprtmultipath.h
index c6cce3fbf29d..ef95a6f18ccf 100644
--- a/include/linux/sunrpc/xprtmultipath.h
+++ b/include/linux/sunrpc/xprtmultipath.h
@@ -14,6 +14,7 @@ struct rpc_xprt_switch {
 	spinlock_t		xps_lock;
 	struct kref		xps_kref;
 
+	unsigned int		xps_id;
 	unsigned int		xps_nxprts;
 	unsigned int		xps_nactive;
 	atomic_long_t		xps_queuelen;
@@ -71,4 +72,7 @@ extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);
 
 extern bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
 		const struct sockaddr *sap);
+
+extern void xprt_multipath_cleanup_ids(void);
+
 #endif
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index b61b74c00483..691c0000e9ea 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -134,6 +134,7 @@ cleanup_sunrpc(void)
 	rpc_sysfs_exit();
 	rpc_cleanup_clids();
 	xprt_cleanup_ids();
+	xprt_multipath_cleanup_ids();
 	rpcauth_remove_module();
 	cleanup_socket_xprt();
 	svc_cleanup_xprt_sock();
diff --git a/net/sunrpc/xprtmultipath.c b/net/sunrpc/xprtmultipath.c
index 78c075a68c04..4969a4c216f7 100644
--- a/net/sunrpc/xprtmultipath.c
+++ b/net/sunrpc/xprtmultipath.c
@@ -86,6 +86,30 @@ void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
 	xprt_put(xprt);
 }
 
+static DEFINE_IDA(rpc_xprtswitch_ids);
+
+void xprt_multipath_cleanup_ids(void)
+{
+	ida_destroy(&rpc_xprtswitch_ids);
+}
+
+static int xprt_switch_alloc_id(struct rpc_xprt_switch *xps, gfp_t gfp_flags)
+{
+	int id;
+
+	id = ida_simple_get(&rpc_xprtswitch_ids, 0, 0, gfp_flags);
+	if (id < 0)
+		return id;
+
+	xps->xps_id = id;
+	return 0;
+}
+
+static void xprt_switch_free_id(struct rpc_xprt_switch *xps)
+{
+	ida_simple_remove(&rpc_xprtswitch_ids, xps->xps_id);
+}
+
 /**
  * xprt_switch_alloc - Allocate a new struct rpc_xprt_switch
  * @xprt: pointer to struct rpc_xprt
@@ -103,6 +127,7 @@ struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
 	if (xps != NULL) {
 		spin_lock_init(&xps->xps_lock);
 		kref_init(&xps->xps_kref);
+		xprt_switch_alloc_id(xps, gfp_flags);
 		xps->xps_nxprts = xps->xps_nactive = 0;
 		atomic_long_set(&xps->xps_queuelen, 0);
 		xps->xps_net = NULL;
@@ -136,6 +161,7 @@ static void xprt_switch_free(struct kref *kref)
 			struct rpc_xprt_switch, xps_kref);
 
 	xprt_switch_free_entries(xps);
+	xprt_switch_free_id(xps);
 	kfree_rcu(xps, xps_rcu);
 }
 
-- 
2.27.0


  parent reply	other threads:[~2021-06-08 20:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-08 19:59 [PATCH v10 00/13] create sysfs files for changing IP address Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 01/13] sunrpc: Create a sunrpc directory under /sys/kernel/ Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 02/13] sunrpc: Create a client/ subdirectory in the sunrpc sysfs Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 03/13] sunrpc: Create per-rpc_clnt sysfs kobjects Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 04/13] sunrpc: add xprt id Olga Kornievskaia
2021-06-08 19:59 ` Olga Kornievskaia [this message]
2021-06-08 19:59 ` [PATCH v10 06/13] sunrpc: keep track of the xprt_class in rpc_xprt structure Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 07/13] sunrpc: add xprt_switch direcotry to sunrpc's sysfs Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 08/13] sunrpc: add a symlink from rpc-client directory to the xprt_switch Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 09/13] sunrpc: add add sysfs directory per xprt under each xprt_switch Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 10/13] sunrpc: add dst_attr attributes to the sysfs xprt directory Olga Kornievskaia
2022-02-28  3:00   ` NeilBrown
2021-06-08 19:59 ` [PATCH v10 11/13] sunrpc: provide transport info in the sysfs directory Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 12/13] sunrpc: provide multipath " Olga Kornievskaia
2021-06-08 19:59 ` [PATCH v10 13/13] sunrpc: provide showing transport's state " Olga Kornievskaia

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210608195922.88655-6-olga.kornievskaia@gmail.com \
    --to=olga.kornievskaia@gmail.com \
    --cc=anna.schumaker@netapp.com \
    --cc=linux-nfs@vger.kernel.org \
    --cc=trond.myklebust@hammerspace.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.