linux-btrace.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-btrace@vger.kernel.org
Subject: [RFC PATCH 06/38] blktrace: add act and prio check helpers
Date: Tue, 26 Jan 2021 23:33:28 +0000	[thread overview]
Message-ID: <20210126233400.31259-7-chaitanya.kulkarni@wdc.com> (raw)

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
 kernel/trace/blktrace.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index ac7a4e6a0b3a..b72fb09a4157 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -311,6 +311,43 @@ static int act_log_check(struct blk_trace *bt, u32 what, sector_t sector,
 	return 0;
 }
 
+static inline bool prio_log_check(struct blk_trace_ext *bt, u32 ioprio)
+{
+	bool ret;
+
+	switch (IOPRIO_PRIO_CLASS(ioprio)) {
+	case IOPRIO_CLASS_NONE:
+		ret = (bt->prio_mask & 0x01) ? true : false;
+		break;
+	case IOPRIO_CLASS_RT:
+		ret = (bt->prio_mask & 0x02) ? true : false;
+		break;
+	case IOPRIO_CLASS_BE:
+		ret = (bt->prio_mask & 0x04) ? true : false;
+		break;
+	case IOPRIO_CLASS_IDLE:
+		ret = (bt->prio_mask & 0x08) ? true : false;
+		break;
+	default:
+		/*XXX: print rate limit warn here */
+		ret = false;
+	}
+	return ret;
+}
+
+static inline int act_log_check_ext(struct blk_trace_ext *bt, u64 what,
+			     sector_t sector, pid_t pid)
+{
+	if (((bt->act_mask << BLK_TC_SHIFT_EXT) & what) = 0)
+		return 1;
+	if (sector && (sector < bt->start_lba || sector > bt->end_lba))
+		return 1;
+	if (bt->pid && pid != bt->pid)
+		return 1;
+
+	return 0;
+}
+
 /*
  * Data direction bit lookup
  */
-- 
2.22.1

                 reply	other threads:[~2021-01-26 23:33 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210126233400.31259-7-chaitanya.kulkarni@wdc.com \
    --to=chaitanya.kulkarni@wdc.com \
    --cc=linux-btrace@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).