From patchwork Mon Oct 16 13:09:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 13423205 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9295027722 for ; Mon, 16 Oct 2023 13:09:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from xavier.telenet-ops.be (xavier.telenet-ops.be [IPv6:2a02:1800:120:4::f00:14]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FA2EED for ; Mon, 16 Oct 2023 06:09:26 -0700 (PDT) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed40:ce84:d8c0:f79a:fa0]) by xavier.telenet-ops.be with bizsmtp id yd9L2A00k0pDX7N01d9Meh; Mon, 16 Oct 2023 15:09:24 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.95) (envelope-from ) id 1qsNLR-006jYu-Do; Mon, 16 Oct 2023 15:09:20 +0200 Received: from geert by rox.of.borg with local (Exim 4.95) (envelope-from ) id 1qsNLU-00A9nW-R3; Mon, 16 Oct 2023 15:09:20 +0200 From: Geert Uytterhoeven To: Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: linux-nfs@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven , kernel test robot Subject: [PATCH -next v3 1/2] sunrpc: Wrap read accesses to rpc_task.tk_pid Date: Mon, 16 Oct 2023 15:09:18 +0200 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org The tk_pid member in the rpc_task structure exists conditionally on debug or tracing being enabled. Introduce and use a wapper to read the value of this member, so users outside tracing no longer have to care about these conditions. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202310121759.0CF34DcN-lkp@intel.com/ Signed-off-by: Geert Uytterhoeven Reviewed-by: Benjamin Coddington --- v3: - New. --- fs/nfs/filelayout/filelayout.c | 12 ++++++------ fs/nfs/flexfilelayout/flexfilelayout.c | 9 +++------ include/linux/sunrpc/sched.h | 10 ++++++++++ net/sunrpc/clnt.c | 2 +- net/sunrpc/debugfs.c | 2 +- 5 files changed, 21 insertions(+), 14 deletions(-) diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c index ce8f8934bca517c0..5af545f49c54db4f 100644 --- a/fs/nfs/filelayout/filelayout.c +++ b/fs/nfs/filelayout/filelayout.c @@ -93,8 +93,7 @@ static void filelayout_reset_write(struct nfs_pgio_header *hdr) if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { dprintk("%s Reset task %5u for i/o through MDS " "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, - hdr->task.tk_pid, - hdr->inode->i_sb->s_id, + rpc_tk_pid(task), hdr->inode->i_sb->s_id, (unsigned long long)NFS_FILEID(hdr->inode), hdr->args.count, (unsigned long long)hdr->args.offset); @@ -110,8 +109,7 @@ static void filelayout_reset_read(struct nfs_pgio_header *hdr) if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { dprintk("%s Reset task %5u for i/o through MDS " "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, - hdr->task.tk_pid, - hdr->inode->i_sb->s_id, + rpc_tk_pid(task), hdr->inode->i_sb->s_id, (unsigned long long)NFS_FILEID(hdr->inode), hdr->args.count, (unsigned long long)hdr->args.offset); @@ -274,7 +272,8 @@ static void filelayout_read_prepare(struct rpc_task *task, void *data) return; } if (filelayout_reset_to_mds(hdr->lseg)) { - dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); + dprintk("%s task %u reset io to MDS\n", __func__, + rpc_tk_pid(task)); filelayout_reset_read(hdr); rpc_exit(task, 0); return; @@ -372,7 +371,8 @@ static void filelayout_write_prepare(struct rpc_task *task, void *data) return; } if (filelayout_reset_to_mds(hdr->lseg)) { - dprintk("%s task %u reset io to MDS\n", __func__, task->tk_pid); + dprintk("%s task %u reset io to MDS\n", __func__, + rpc_tk_pid(task)); filelayout_reset_write(hdr); rpc_exit(task, 0); return; diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index a1dc338649062de3..3dd17f675d433f4d 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -1017,8 +1017,7 @@ static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) if (retry_pnfs) { dprintk("%s Reset task %5u for i/o through pNFS " "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, - hdr->task.tk_pid, - hdr->inode->i_sb->s_id, + rpc_tk_pid(task), hdr->inode->i_sb->s_id, (unsigned long long)NFS_FILEID(hdr->inode), hdr->args.count, (unsigned long long)hdr->args.offset); @@ -1030,8 +1029,7 @@ static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs) if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { dprintk("%s Reset task %5u for i/o through MDS " "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, - hdr->task.tk_pid, - hdr->inode->i_sb->s_id, + rpc_tk_pid(task), hdr->inode->i_sb->s_id, (unsigned long long)NFS_FILEID(hdr->inode), hdr->args.count, (unsigned long long)hdr->args.offset); @@ -1066,8 +1064,7 @@ static void ff_layout_reset_read(struct nfs_pgio_header *hdr) if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { dprintk("%s Reset task %5u for i/o through MDS " "(req %s/%llu, %u bytes @ offset %llu)\n", __func__, - hdr->task.tk_pid, - hdr->inode->i_sb->s_id, + rpc_tk_pid(task), hdr->inode->i_sb->s_id, (unsigned long long)NFS_FILEID(hdr->inode), hdr->args.count, (unsigned long long)hdr->args.offset); diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index 8ada7dc802d30507..0f39e60d28ed0132 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -270,6 +270,11 @@ void rpc_prepare_task(struct rpc_task *task); gfp_t rpc_task_gfp_mask(void); #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS) +static inline unsigned short rpc_tk_pid(const struct rpc_task *task) +{ + return task->tk_pid; +} + static inline const char * rpc_qname(const struct rpc_wait_queue *q) { return ((q && q->name) ? q->name : "unknown"); @@ -281,6 +286,11 @@ static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q, q->name = name; } #else +static inline unsigned short rpc_tk_pid(const struct rpc_task *task) +{ + return 0; +} + static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q, const char *name) { diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 9c210273d06b7f51..2f37e4143789b0cc 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -3320,7 +3320,7 @@ static void rpc_show_task(const struct rpc_clnt *clnt, rpc_waitq = rpc_qname(task->tk_waitqueue); printk(KERN_INFO "%5u %04x %6d %8p %8p %8ld %8p %sv%u %s a:%ps q:%s\n", - task->tk_pid, task->tk_flags, task->tk_status, + rpc_tk_pid(task), task->tk_flags, task->tk_status, clnt, task->tk_rqstp, rpc_task_timeout(task), task->tk_ops, clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), task->tk_action, rpc_waitq); diff --git a/net/sunrpc/debugfs.c b/net/sunrpc/debugfs.c index a176d5a0b0ee9a2c..8896518dd6f3ce0e 100644 --- a/net/sunrpc/debugfs.c +++ b/net/sunrpc/debugfs.c @@ -31,7 +31,7 @@ tasks_show(struct seq_file *f, void *v) xid = be32_to_cpu(task->tk_rqstp->rq_xid); seq_printf(f, "%5u %04x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n", - task->tk_pid, task->tk_flags, task->tk_status, + rpc_tk_pid(task), task->tk_flags, task->tk_status, clnt->cl_clid, xid, rpc_task_timeout(task), task->tk_ops, clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task), task->tk_action, rpc_waitq); From patchwork Mon Oct 16 13:09:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 13423203 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E79DE273FE for ; Mon, 16 Oct 2023 13:09:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from xavier.telenet-ops.be (xavier.telenet-ops.be [IPv6:2a02:1800:120:4::f00:14]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14C48A2 for ; Mon, 16 Oct 2023 06:09:24 -0700 (PDT) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed40:ce84:d8c0:f79a:fa0]) by xavier.telenet-ops.be with bizsmtp id yd9M2A0010pDX7N01d9Mei; Mon, 16 Oct 2023 15:09:23 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtp (Exim 4.95) (envelope-from ) id 1qsNLR-006jYw-EV; Mon, 16 Oct 2023 15:09:20 +0200 Received: from geert by rox.of.borg with local (Exim 4.95) (envelope-from ) id 1qsNLU-00A9nZ-SG; Mon, 16 Oct 2023 15:09:20 +0200 From: Geert Uytterhoeven To: Trond Myklebust , Anna Schumaker , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: linux-nfs@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH -next v3 2/2] sunrpc: Use no_printk() in dfprintk*() dummies Date: Mon, 16 Oct 2023 15:09:19 +0200 Message-Id: <180fd042261dcd4243fad90660b114b8f0a78dcd.1697460614.git.geert+renesas@glider.be> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net When building NFS with W=1 and CONFIG_WERROR=y, but CONFIG_SUNRPC_DEBUG=n: fs/nfs/nfs4proc.c: In function ‘nfs4_proc_create_session’: fs/nfs/nfs4proc.c:9276:19: error: variable ‘ptr’ set but not used [-Werror=unused-but-set-variable] 9276 | unsigned *ptr; | ^~~ CC fs/nfs/callback.o fs/nfs/callback.c: In function ‘nfs41_callback_svc’: fs/nfs/callback.c:98:13: error: variable ‘error’ set but not used [-Werror=unused-but-set-variable] 98 | int error; | ^~~~~ CC fs/nfs/flexfilelayout/flexfilelayout.o fs/nfs/flexfilelayout/flexfilelayout.c: In function ‘ff_layout_io_track_ds_error’: fs/nfs/flexfilelayout/flexfilelayout.c:1230:13: error: variable ‘err’ set but not used [-Werror=unused-but-set-variable] 1230 | int err; | ^~~ CC fs/nfs/flexfilelayout/flexfilelayoutdev.o fs/nfs/flexfilelayout/flexfilelayoutdev.c: In function ‘nfs4_ff_alloc_deviceid_node’: fs/nfs/flexfilelayout/flexfilelayoutdev.c:55:16: error: variable ‘ret’ set but not used [-Werror=unused-but-set-variable] 55 | int i, ret = -ENOMEM; | ^~~ All these are due to variables that are set unconditionally, but are used only when debugging is enabled. Fix this by changing the dfprintk*() dummy macros from empty loops to calls to the no_printk() helper. This informs the compiler that the passed debug parameters are actually used, and enables format specifier checking as a bonus. This requires removing the protection by CONFIG_SUNRPC_DEBUG of the declaration of nlmdbg_cookie2a() in fs/lockd/svclock.c, as its reference is now visible to the compiler, but optimized away. Signed-off-by: Geert Uytterhoeven Acked-by: Jeff Layton Reviewed-by: Benjamin Coddington --- v3: - Add Acked-by, v2: - s/uncontionally/unconditionally/, - Drop CONFIG_SUNRPC_DEBUG check in fs/lockd/svclock.c to fix build failure. --- fs/lockd/svclock.c | 2 -- include/linux/sunrpc/debug.h | 6 +++--- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index 43aeba9de55cbbc5..b80e0e143c5db16a 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -55,7 +55,6 @@ static const struct rpc_call_ops nlmsvc_grant_ops; static LIST_HEAD(nlm_blocked); static DEFINE_SPINLOCK(nlm_blocked_lock); -#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie) { /* @@ -82,7 +81,6 @@ static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie) return buf; } -#endif /* * Insert a blocked lock into the global list diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h index f6aeed07fe04e3d5..76539c6673f2fb15 100644 --- a/include/linux/sunrpc/debug.h +++ b/include/linux/sunrpc/debug.h @@ -67,9 +67,9 @@ do { \ # define RPC_IFDEBUG(x) x #else # define ifdebug(fac) if (0) -# define dfprintk(fac, fmt, ...) do {} while (0) -# define dfprintk_cont(fac, fmt, ...) do {} while (0) -# define dfprintk_rcu(fac, fmt, ...) do {} while (0) +# define dfprintk(fac, fmt, ...) no_printk(fmt, ##__VA_ARGS__) +# define dfprintk_cont(fac, fmt, ...) no_printk(fmt, ##__VA_ARGS__) +# define dfprintk_rcu(fac, fmt, ...) no_printk(fmt, ##__VA_ARGS__) # define RPC_IFDEBUG(x) #endif