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[172.10.226.31]) by smtp.gmail.com with ESMTPSA id 6sm1486019iog.36.2021.05.06.14.34.46 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 May 2021 14:34:46 -0700 (PDT) From: Olga Kornievskaia To: trond.myklebust@hammerspace.com, anna.schumaker@netapp.com Cc: linux-nfs@vger.kernel.org Subject: [PATCH v5 08/12] sunrpc: add a symlink from rpc-client directory to the xprt_switch Date: Thu, 6 May 2021 17:34:31 -0400 Message-Id: <20210506213435.42457-9-olga.kornievskaia@gmail.com> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20210506213435.42457-1-olga.kornievskaia@gmail.com> References: <20210506213435.42457-1-olga.kornievskaia@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org From: Olga Kornievskaia An rpc client uses a transport switch and one ore more transports associated with that switch. Since transports are shared among rpc clients, create a symlink into the xprt_switch directory instead of duplicating entries under each rpc client. Signed-off-by: Olga Kornievskaia --- net/sunrpc/clnt.c | 2 +- net/sunrpc/sysfs.c | 25 +++++++++++++++++++++++-- net/sunrpc/sysfs.h | 6 +++++- 3 files changed, 29 insertions(+), 4 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index dab1abfef5cd..2e195623c10d 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -301,7 +301,6 @@ static int rpc_client_register(struct rpc_clnt *clnt, int err; rpc_clnt_debugfs_register(clnt); - rpc_sysfs_client_setup(clnt, net); pipefs_sb = rpc_get_sb_net(net); if (pipefs_sb) { @@ -426,6 +425,7 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, /* save the nodename */ rpc_clnt_set_nodename(clnt, nodename); + rpc_sysfs_client_setup(clnt, xps, rpc_net_ns(clnt)); err = rpc_client_register(clnt, args->authflavor, args->client_name); if (err) goto out_no_path; diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c index ed9f7131543f..98d27273d988 100644 --- a/net/sunrpc/sysfs.c +++ b/net/sunrpc/sysfs.c @@ -151,14 +151,30 @@ rpc_sysfs_xprt_switch_alloc(struct kobject *parent, return NULL; } -void rpc_sysfs_client_setup(struct rpc_clnt *clnt, struct net *net) +void rpc_sysfs_client_setup(struct rpc_clnt *clnt, + struct rpc_xprt_switch *xprt_switch, + struct net *net) { struct rpc_sysfs_client *rpc_client; - rpc_client = rpc_sysfs_client_alloc(rpc_sunrpc_client_kobj, net, clnt->cl_clid); + rpc_client = rpc_sysfs_client_alloc(rpc_sunrpc_client_kobj, + net, clnt->cl_clid); if (rpc_client) { + char name[23]; + struct rpc_sysfs_xprt_switch *xswitch = + (struct rpc_sysfs_xprt_switch *)xprt_switch->xps_sysfs; + int ret; + clnt->cl_sysfs = rpc_client; + rpc_client->clnt = clnt; + rpc_client->xprt_switch = xprt_switch; kobject_uevent(&rpc_client->kobject, KOBJ_ADD); + snprintf(name, sizeof(name), "switch-%d", xprt_switch->xps_id); + ret = sysfs_create_link_nowarn(&rpc_client->kobject, + &xswitch->kobject, name); + if (ret) + pr_warn("can't create link to %s in sysfs (%d)\n", + name, ret); } } @@ -189,6 +205,11 @@ void rpc_sysfs_client_destroy(struct rpc_clnt *clnt) struct rpc_sysfs_client *rpc_client = clnt->cl_sysfs; if (rpc_client) { + char name[23]; + + snprintf(name, sizeof(name), "switch-%d", + rpc_client->xprt_switch->xps_id); + sysfs_remove_link(&rpc_client->kobject, name); kobject_uevent(&rpc_client->kobject, KOBJ_REMOVE); kobject_del(&rpc_client->kobject); kobject_put(&rpc_client->kobject); diff --git a/net/sunrpc/sysfs.h b/net/sunrpc/sysfs.h index 52ec472bd4a9..760f0582aee5 100644 --- a/net/sunrpc/sysfs.h +++ b/net/sunrpc/sysfs.h @@ -8,6 +8,8 @@ struct rpc_sysfs_client { struct kobject kobject; struct net *net; + struct rpc_clnt *clnt; + struct rpc_xprt_switch *xprt_switch; }; struct rpc_sysfs_xprt_switch { @@ -20,7 +22,9 @@ struct rpc_sysfs_xprt_switch { int rpc_sysfs_init(void); void rpc_sysfs_exit(void); -void rpc_sysfs_client_setup(struct rpc_clnt *clnt, struct net *net); +void rpc_sysfs_client_setup(struct rpc_clnt *clnt, + struct rpc_xprt_switch *xprt_switch, + struct net *net); void rpc_sysfs_client_destroy(struct rpc_clnt *clnt); void rpc_sysfs_xprt_switch_setup(struct rpc_xprt_switch *xprt_switch, struct rpc_xprt *xprt, gfp_t gfp_flags);