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Tue, 04 Aug 2026 06:04:46 -0400 X-MC-Unique: lXns26YKO4a0ZzhPxzF_7A-1 X-Mimecast-MFC-AGG-ID: lXns26YKO4a0ZzhPxzF_7A_1785837883 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CF8C819560A7; Tue, 4 Aug 2026 10:04:42 +0000 (UTC) Received: from warthog.procyon.org.com (unknown [10.44.32.44]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E5950300019F; Tue, 4 Aug 2026 10:04:36 +0000 (UTC) From: David Howells To: Christian Brauner , Matthew Wilcox , Christoph Hellwig Cc: David Howells , Paulo Alcantara , Jens Axboe , Leon Romanovsky , Steve French , ChenXiaoSong , Marc Dionne , Stefan Metzmacher , Eric Van Hensbergen , Dominique Martinet , Ilya Dryomov , netfs@lists.linux.dev, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v8 15/25] netfs: Add the cache object ID to netfs_read/write tracepoints Date: Tue, 4 Aug 2026 11:02:10 +0100 Message-ID: <20260804100224.2748935-16-dhowells@redhat.com> In-Reply-To: <20260804100224.2748935-1-dhowells@redhat.com> References: <20260804100224.2748935-1-dhowells@redhat.com> X-Mailing-List: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: q2Y1RXKsDZ1ESovLFSHmxS6LqLAImJFrCXrmhtl9bDU_1785837883 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Add the cache object debug ID to netfs_read/write tracepoints to make debugging easier as there's now a direct cross-reference with the cachefiles tracepoints that only log that debug ID. Signed-off-by: David Howells cc: Paulo Alcantara cc: netfs@lists.linux.dev cc: linux-fsdevel@vger.kernel.org --- fs/cachefiles/io.c | 1 + fs/netfs/fscache_io.c | 2 +- include/linux/netfs.h | 3 ++- include/trace/events/netfs.h | 27 +++++++++++++++------------ 4 files changed, 19 insertions(+), 14 deletions(-) diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c index 64d1e3d526d6..2b5471ca8378 100644 --- a/fs/cachefiles/io.c +++ b/fs/cachefiles/io.c @@ -921,6 +921,7 @@ bool cachefiles_begin_operation(struct netfs_cache_resources *cres, if (!cachefiles_cres_file(cres)) { cres->ops = &cachefiles_netfs_cache_ops; + cres->object_id = object->debug_id; if (object->file) { spin_lock(&object->lock); file = object->file; diff --git a/fs/netfs/fscache_io.c b/fs/netfs/fscache_io.c index 37f05b4d3469..fafa8c6bec57 100644 --- a/fs/netfs/fscache_io.c +++ b/fs/netfs/fscache_io.c @@ -79,7 +79,7 @@ static int fscache_begin_operation(struct netfs_cache_resources *cres, cres->ops = NULL; cres->cache_priv = cookie; cres->cache_priv2 = NULL; - cres->debug_id = cookie->debug_id; + cres->cookie_id = cookie->debug_id; cres->inval_counter = cookie->inval_counter; if (!fscache_begin_cookie_access(cookie, why)) { diff --git a/include/linux/netfs.h b/include/linux/netfs.h index 10be7180e6f3..09e81475e899 100644 --- a/include/linux/netfs.h +++ b/include/linux/netfs.h @@ -165,7 +165,8 @@ struct netfs_cache_resources { void *cache_priv; void *cache_priv2; unsigned long long cache_i_size; /* Initial size of cache file */ - unsigned int debug_id; /* Cookie debug ID */ + unsigned int cookie_id; /* Cache cookie debug ID */ + unsigned int object_id; /* Cache object debug ID */ unsigned int inval_counter; /* object->inval_counter at begin_op */ unsigned int dio_size; /* DIO block size */ }; diff --git a/include/trace/events/netfs.h b/include/trace/events/netfs.h index cc3806e383f5..5dc61a4ba5f0 100644 --- a/include/trace/events/netfs.h +++ b/include/trace/events/netfs.h @@ -310,6 +310,7 @@ TRACE_EVENT(netfs_read, TP_STRUCT__entry( __field(unsigned int, rreq) __field(unsigned int, cookie) + __field(unsigned int, object) __field(loff_t, i_size) __field(loff_t, start) __field(size_t, len) @@ -319,7 +320,8 @@ TRACE_EVENT(netfs_read, TP_fast_assign( __entry->rreq = rreq->debug_id; - __entry->cookie = rreq->cache_resources.debug_id; + __entry->cookie = rreq->cache_resources.cookie_id; + __entry->object = rreq->cache_resources.object_id; __entry->i_size = rreq->i_size; __entry->start = start; __entry->len = len; @@ -327,10 +329,10 @@ TRACE_EVENT(netfs_read, __entry->netfs_inode = rreq->inode->i_ino; ), - TP_printk("R=%08x %s c=%08x ni=%llx s=%llx l=%zx sz=%llx", + TP_printk("R=%08x %s c=%08x o=%08x ni=%llx s=%llx l=%zx sz=%llx", __entry->rreq, __print_symbolic(__entry->what, netfs_read_traces), - __entry->cookie, + __entry->cookie, __entry->object, __entry->netfs_inode, __entry->start, __entry->len, __entry->i_size) ); @@ -551,6 +553,7 @@ TRACE_EVENT(netfs_write, TP_STRUCT__entry( __field(unsigned int, wreq) __field(unsigned int, cookie) + __field(unsigned int, object) __field(unsigned int, ino) __field(enum netfs_write_trace, what) __field(unsigned long long, start) @@ -558,20 +561,19 @@ TRACE_EVENT(netfs_write, ), TP_fast_assign( - struct netfs_inode *__ctx = netfs_inode(wreq->inode); - struct fscache_cookie *__cookie = netfs_i_cookie(__ctx); __entry->wreq = wreq->debug_id; - __entry->cookie = __cookie ? __cookie->debug_id : 0; + __entry->cookie = wreq->cache_resources.cookie_id; + __entry->object = wreq->cache_resources.object_id; __entry->ino = wreq->inode->i_ino; __entry->what = what; __entry->start = wreq->start; __entry->len = wreq->len; ), - TP_printk("R=%08x %s c=%08x i=%x by=%llx-%llx", + TP_printk("R=%08x %s c=%08x o=%08x i=%x by=%llx-%llx", __entry->wreq, __print_symbolic(__entry->what, netfs_write_traces), - __entry->cookie, + __entry->cookie, __entry->object, __entry->ino, __entry->start, __entry->start + __entry->len - 1) ); @@ -586,22 +588,23 @@ TRACE_EVENT(netfs_copy2cache, __field(unsigned int, rreq) __field(unsigned int, creq) __field(unsigned int, cookie) + __field(unsigned int, object) __field(unsigned int, ino) ), TP_fast_assign( - struct netfs_inode *__ctx = netfs_inode(rreq->inode); - struct fscache_cookie *__cookie = netfs_i_cookie(__ctx); __entry->rreq = rreq->debug_id; __entry->creq = creq->debug_id; - __entry->cookie = __cookie ? __cookie->debug_id : 0; + __entry->cookie = rreq->cache_resources.cookie_id; + __entry->object = rreq->cache_resources.object_id; __entry->ino = rreq->inode->i_ino; ), - TP_printk("R=%08x CR=%08x c=%08x i=%x ", + TP_printk("R=%08x CR=%08x c=%08x o=%08x i=%x ", __entry->rreq, __entry->creq, __entry->cookie, + __entry->object, __entry->ino) );