From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 10598238159; Tue, 10 Jun 2025 14:59:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749567594; cv=none; b=mirnhCxBVyFEBi3rxlQCqGXWf9WXIWK8M2u0D6GtfLy2bNISr8k+UnCQVUHYHK95RH/DaHdfJt8P8y8OxLvLOYCKV2nlGQ82JVFYUNKtplZoKi2X2yhuAWH91U4GC3t8fiH1cfN5U8ZZMMOFRoycYWy3R9q+BMfs5Q8WYjEHWzU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749567594; c=relaxed/simple; bh=fIUtfKsTxdswV0+z7NV6Nx2ljCgH4pcViNimfWT3u1o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ehTUnf8Np9GQzyuOcw5xf4fbDUWfZ1NoBlr076x834hWNxoYUIeYbbySZuOeHI0LZP6BYvXg9sBkocTFX7eJra4xYPpiDZdav3C/N2sPWOp5Ua7x5WxoPCkYlGrEy646QxBcaT9anLGuxOrlnqdWdI+PQfvyH5CVne2Do58CnxU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M5rL0v3E; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="M5rL0v3E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBA0AC4CEF0; Tue, 10 Jun 2025 14:59:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749567593; bh=fIUtfKsTxdswV0+z7NV6Nx2ljCgH4pcViNimfWT3u1o=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=M5rL0v3EHgtzm1+YPuRcK2PSIOLO9mlfBdonjLj5F4sfLQypAm1+pB1TXYtMM7fpk 6KLgCw5CkKufVZ1l0tkGw6xLxxX/1vMyCfzgLNZDdN0DPv0EyOAfhqHmBB0Xe1KO+1 0VXLviw2MPa0tpydfSLnut1HqjP2FFqsjAGEc4/FTXyy/RH6I9ZFP6zdePgiG18yB7 nZA7IqiEUXYtL9A2aSJbrsJRp7YASgQqfFnSb1gSFuPq4wi3h+r+yV04K2vTORqz9D HL8+Be9UTgYmTKddM1NeJzxOOM9X2twBrT9nli2s8bAMgU1mtfuj1CAOEjKH/cvfFr toNQhgU8MIaXA== From: Jeff Layton Date: Tue, 10 Jun 2025 10:59:25 -0400 Subject: [PATCH v14 5/9] ref_tracker: allow pr_ostream() to print directly to a seq_file Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250610-reftrack-dbgfs-v14-5-efb532861428@kernel.org> References: <20250610-reftrack-dbgfs-v14-0-efb532861428@kernel.org> In-Reply-To: <20250610-reftrack-dbgfs-v14-0-efb532861428@kernel.org> To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin Cc: Krzysztof Karas , Kuniyuki Iwashima , Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1919; i=jlayton@kernel.org; h=from:subject:message-id; bh=fIUtfKsTxdswV0+z7NV6Nx2ljCgH4pcViNimfWT3u1o=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoSEhcnHtf/8juAzoak1v6poZL6p29vAqIwvQWR a6pOohhBWyJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaEhIXAAKCRAADmhBGVaC Ff+HD/9vTdoNPo+3wTbGpEMt9ydg3c6ivO2MrcOnnHyyGvkoa/t7uiHV1J93vQln5SQpAnQpjls RtfB3oXiuxy3z/9it2bTtHqUlES5HpHDPhycMos5uAtjlPpFYVUkGUnKKlSEzzMjfK3xzHyOmE7 1Aq3rXvaqxSU+SnxZRRVBECoSZn8Al1Wm7WRrpwmqGi38RD9zMBgl7VrqVcrSBwYe+WBaXg7erF VvajFxbiIRvv4CBFvVyhv3RXPWvknXC3sPs9mt2DEqpcEG3tuLsZUn4+EUBJedDdSwJK4UyaGcE k5pbvKZrUzUIzb0RNDlqYC76ej9KTT4I3UlqoLr8X3aoMSdM2vwmxQ3ve6UNL5DnHz89wzkwurZ E/B8XiseC1+x3kMON/Gcrwvu7v4hdggbPZdksjrgCQrCISoF4ka5AHjvh2/34bFCgbPjgDfBtbM iRj7E/OSQ6niXden1KFkbuekkrg/tP9B9/tYQMekqzw6kULbB7idAJF8eQWNqN7caOcHLoiEfYu ctfKLA0JCrrxTsBlPTjsKVW6PQvtMNf74ZwPHPDoe4TR2wlKNTpv6j/Wnod5L6VCoCIz/fbkZb0 crqSXwCGeryhbAdVz1gwGlD3m143OGGHltOGC83GRviAcRp+Vh6uwjx4EwcuLED38MCuvB88dUC RpjWRF4q3ehSslw== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Allow pr_ostream to also output directly to a seq_file without an intermediate buffer. The first caller of +ref_tracker_dir_seq_print() will come in a later patch, so mark that __maybe_unused for now. That designation will be removed once it is used. Reviewed-by: Andrew Lunn Signed-off-by: Jeff Layton --- lib/ref_tracker.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index 42872f406b2a91b5bc611405cae7ce883fd8ed22..73b606570cce9e551d13e65365a87dc4ce748b13 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -8,6 +8,7 @@ #include #include #include +#include #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 @@ -66,6 +67,7 @@ struct ostream { void __ostream_printf (*func)(struct ostream *stream, char *fmt, ...); char *prefix; char *buf; + struct seq_file *seq; int size, used; }; @@ -301,6 +303,30 @@ EXPORT_SYMBOL_GPL(ref_tracker_free); static struct dentry *ref_tracker_debug_dir = (struct dentry *)-ENOENT; +static void __ostream_printf pr_ostream_seq(struct ostream *stream, char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + seq_vprintf(stream->seq, fmt, args); + va_end(args); +} + +static __maybe_unused int +ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct seq_file *seq) +{ + struct ostream os = { .func = pr_ostream_seq, + .prefix = "", + .seq = seq }; + unsigned long flags; + + spin_lock_irqsave(&dir->lock, flags); + __ref_tracker_dir_pr_ostream(dir, 16, &os); + spin_unlock_irqrestore(&dir->lock, flags); + + return os.used; +} + static int __init ref_tracker_debugfs_init(void) { ref_tracker_debug_dir = debugfs_create_dir("ref_tracker", NULL); -- 2.49.0