From patchwork Wed Dec 22 23:24:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 528154 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7504DC433EF for ; Wed, 22 Dec 2021 23:25:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344093AbhLVXZC (ORCPT ); Wed, 22 Dec 2021 18:25:02 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:54657 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344233AbhLVXYk (ORCPT ); Wed, 22 Dec 2021 18:24:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1640215479; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BEkgFH71wgXQqW/IpVWA8T4D4eNiGF1a2TbvK0i/UlY=; b=ZWPU3zinhhWizlz9vXIHLSnPmbrGjrJcnT3/VzrMcEhYTgpeX7v179hfFO9V9OJ1rMexhJ /3qmoKHtTf7TZFrVE0UWcHG67/Bc/kV0nPLGSElk2ZnNQfaRtxWW6jJZjcY6OlyXL7XCR5 xkd2RWJ34TWijwbOUIplBA5pbllcIQI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-464-T5BRlqglPuOBnWFlv8bc3A-1; Wed, 22 Dec 2021 18:24:34 -0500 X-MC-Unique: T5BRlqglPuOBnWFlv8bc3A-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5C85D18397C2; Wed, 22 Dec 2021 23:24:32 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.165]) by smtp.corp.redhat.com (Postfix) with ESMTP id BA41A75748; Wed, 22 Dec 2021 23:24:23 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH v4 42/68] cachefiles: Add tracepoints for calls to the VFS From: David Howells To: linux-cachefs@redhat.com Cc: dhowells@redhat.com, Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet , Jeff Layton , Matthew Wilcox , Alexander Viro , Omar Sandoval , JeffleXu , Linus Torvalds , linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 22 Dec 2021 23:24:22 +0000 Message-ID: <164021546287.640689.3501604495002415631.stgit@warthog.procyon.org.uk> In-Reply-To: <164021479106.640689.17404516570194656552.stgit@warthog.procyon.org.uk> References: <164021479106.640689.17404516570194656552.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Add tracepoints in cachefiles to monitor when it does various VFS operations, such as mkdir. Signed-off-by: David Howells cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/163819638517.215744.12773133137536579766.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/163906938316.143852.17227990869551737803.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163967147139.1823006.4909879317496543392.stgit@warthog.procyon.org.uk/ # v3 --- include/trace/events/cachefiles.h | 176 +++++++++++++++++++++++++++++++++++++ 1 file changed, 176 insertions(+) diff --git a/include/trace/events/cachefiles.h b/include/trace/events/cachefiles.h index 6331cd29880d..5975ea4977b2 100644 --- a/include/trace/events/cachefiles.h +++ b/include/trace/events/cachefiles.h @@ -18,6 +18,21 @@ #ifndef __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY #define __CACHEFILES_DECLARE_TRACE_ENUMS_ONCE_ONLY +enum fscache_why_object_killed { + FSCACHE_OBJECT_IS_STALE, + FSCACHE_OBJECT_IS_WEIRD, + FSCACHE_OBJECT_INVALIDATED, + FSCACHE_OBJECT_NO_SPACE, + FSCACHE_OBJECT_WAS_RETIRED, + FSCACHE_OBJECT_WAS_CULLED, +}; + +enum cachefiles_trunc_trace { + cachefiles_trunc_dio_adjust, + cachefiles_trunc_expand_tmpfile, + cachefiles_trunc_shrink, +}; + enum cachefiles_error_trace { cachefiles_trace_fallocate_error, cachefiles_trace_getxattr_error, @@ -43,6 +58,19 @@ enum cachefiles_error_trace { /* * Define enum -> string mappings for display. */ +#define cachefiles_obj_kill_traces \ + EM(FSCACHE_OBJECT_IS_STALE, "stale") \ + EM(FSCACHE_OBJECT_IS_WEIRD, "weird") \ + EM(FSCACHE_OBJECT_INVALIDATED, "inval") \ + EM(FSCACHE_OBJECT_NO_SPACE, "no_space") \ + EM(FSCACHE_OBJECT_WAS_RETIRED, "was_retired") \ + E_(FSCACHE_OBJECT_WAS_CULLED, "was_culled") + +#define cachefiles_trunc_traces \ + EM(cachefiles_trunc_dio_adjust, "DIOADJ") \ + EM(cachefiles_trunc_expand_tmpfile, "EXPTMP") \ + E_(cachefiles_trunc_shrink, "SHRINK") + #define cachefiles_error_traces \ EM(cachefiles_trace_fallocate_error, "fallocate") \ EM(cachefiles_trace_getxattr_error, "getxattr") \ @@ -71,6 +99,8 @@ enum cachefiles_error_trace { #define EM(a, b) TRACE_DEFINE_ENUM(a); #define E_(a, b) TRACE_DEFINE_ENUM(a); +cachefiles_obj_kill_traces; +cachefiles_trunc_traces; cachefiles_error_traces; /* @@ -83,6 +113,152 @@ cachefiles_error_traces; #define E_(a, b) { a, b } +TRACE_EVENT(cachefiles_lookup, + TP_PROTO(struct cachefiles_object *obj, + struct dentry *de), + + TP_ARGS(obj, de), + + TP_STRUCT__entry( + __field(unsigned int, obj ) + __field(short, error ) + __field(unsigned long, ino ) + ), + + TP_fast_assign( + __entry->obj = obj->debug_id; + __entry->ino = (!IS_ERR(de) && d_backing_inode(de) ? + d_backing_inode(de)->i_ino : 0); + __entry->error = IS_ERR(de) ? PTR_ERR(de) : 0; + ), + + TP_printk("o=%08x i=%lx e=%d", + __entry->obj, __entry->ino, __entry->error) + ); + +TRACE_EVENT(cachefiles_tmpfile, + TP_PROTO(struct cachefiles_object *obj, struct inode *backer), + + TP_ARGS(obj, backer), + + TP_STRUCT__entry( + __field(unsigned int, obj ) + __field(unsigned int, backer ) + ), + + TP_fast_assign( + __entry->obj = obj->debug_id; + __entry->backer = backer->i_ino; + ), + + TP_printk("o=%08x b=%08x", + __entry->obj, + __entry->backer) + ); + +TRACE_EVENT(cachefiles_link, + TP_PROTO(struct cachefiles_object *obj, struct inode *backer), + + TP_ARGS(obj, backer), + + TP_STRUCT__entry( + __field(unsigned int, obj ) + __field(unsigned int, backer ) + ), + + TP_fast_assign( + __entry->obj = obj->debug_id; + __entry->backer = backer->i_ino; + ), + + TP_printk("o=%08x b=%08x", + __entry->obj, + __entry->backer) + ); + +TRACE_EVENT(cachefiles_unlink, + TP_PROTO(struct cachefiles_object *obj, + struct dentry *de, + enum fscache_why_object_killed why), + + TP_ARGS(obj, de, why), + + /* Note that obj may be NULL */ + TP_STRUCT__entry( + __field(unsigned int, obj ) + __field(struct dentry *, de ) + __field(enum fscache_why_object_killed, why ) + ), + + TP_fast_assign( + __entry->obj = obj ? obj->debug_id : UINT_MAX; + __entry->de = de; + __entry->why = why; + ), + + TP_printk("o=%08x d=%p w=%s", + __entry->obj, __entry->de, + __print_symbolic(__entry->why, cachefiles_obj_kill_traces)) + ); + +TRACE_EVENT(cachefiles_rename, + TP_PROTO(struct cachefiles_object *obj, + struct dentry *de, + struct dentry *to, + enum fscache_why_object_killed why), + + TP_ARGS(obj, de, to, why), + + /* Note that obj may be NULL */ + TP_STRUCT__entry( + __field(unsigned int, obj ) + __field(struct dentry *, de ) + __field(struct dentry *, to ) + __field(enum fscache_why_object_killed, why ) + ), + + TP_fast_assign( + __entry->obj = obj ? obj->debug_id : UINT_MAX; + __entry->de = de; + __entry->to = to; + __entry->why = why; + ), + + TP_printk("o=%08x d=%p t=%p w=%s", + __entry->obj, __entry->de, __entry->to, + __print_symbolic(__entry->why, cachefiles_obj_kill_traces)) + ); + +TRACE_EVENT(cachefiles_trunc, + TP_PROTO(struct cachefiles_object *obj, struct inode *backer, + loff_t from, loff_t to, enum cachefiles_trunc_trace why), + + TP_ARGS(obj, backer, from, to, why), + + TP_STRUCT__entry( + __field(unsigned int, obj ) + __field(unsigned int, backer ) + __field(enum cachefiles_trunc_trace, why ) + __field(loff_t, from ) + __field(loff_t, to ) + ), + + TP_fast_assign( + __entry->obj = obj->debug_id; + __entry->backer = backer->i_ino; + __entry->from = from; + __entry->to = to; + __entry->why = why; + ), + + TP_printk("o=%08x b=%08x %s l=%llx->%llx", + __entry->obj, + __entry->backer, + __print_symbolic(__entry->why, cachefiles_trunc_traces), + __entry->from, + __entry->to) + ); + TRACE_EVENT(cachefiles_mark_active, TP_PROTO(struct cachefiles_object *obj, struct inode *inode),