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s=default; t=1792742591; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=HjYXYfZlv+QyOB31C+haC4gTu+lLwzg9gQxK7ehwk80=; b=CKYwpzCdDciJ952PEYp7AfLZSte7D8mSuoQCiYJQLmTj9nreW5xFCOnch/n8kYli7eYlWEityaxI0pEXBDEDX0F19PldRDb5/K7TDb7p16kcsWfRCVhLzU3q8UUcBzIiNBPJeKuibCmFQ603EnkCg63UWE8e7+x7uSLV/8yq4qo= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R851e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033032089153;MF=kanie@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0XDLPeKt_1792742589; Received: from localhost(mailfrom:kanie@linux.alibaba.com fp:SMTPD_---0XDLPeKt_1792742589 cluster:ay36) by smtp.aliyun-inc.com; Fri, 23 Oct 2026 16:03:10 +0800 From: Guixin Liu To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Nilay Shroff , Daniel Wagner , Hannes Reinecke Cc: linux-nvme@lists.infradead.org Subject: [PATCH 11/11] nvmet: add an FDP write translation tracepoint Date: Fri, 23 Oct 2026 16:02:51 +0800 Message-ID: <20261023080251.2606443-12-kanie@linux.alibaba.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20261023080251.2606443-1-kanie@linux.alibaba.com> References: <20261023080251.2606443-1-kanie@linux.alibaba.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261023_090322_974644_1F9FCAD4 X-CRM114-Status: GOOD ( 11.24 ) X-Spam-Score: -15.7 (---------------) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" X-Spam-Status: No, score=-26.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Add a tracepoint to the write path that reports the placement identifier carried by a write command with the Data Placement Directive and the backing write stream it is translated to. Signed-off-by: Guixin Liu --- drivers/nvme/target/io-cmd-bdev.c | 8 ++++++++ drivers/nvme/target/trace.h | 23 +++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 832b406442440..a8f3ad736335f 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -9,6 +9,7 @@ #include #include #include "nvmet.h" +#include "trace.h" void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id) { @@ -305,6 +306,13 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) nvmet_fdp_enabled(req->ns)) { write_stream = nvmet_fdp_write_stream(req); bio->bi_write_stream = write_stream; + + if (write_stream) { + u16 pid = le32_to_cpu(req->cmd->rw.dsmgmt) >> 16; + + trace_nvmet_fdp_write_translate(req, pid, + write_stream); + } } blk_start_plug(&plug); diff --git a/drivers/nvme/target/trace.h b/drivers/nvme/target/trace.h index 7f7ebf9558e50..0ab7252960790 100644 --- a/drivers/nvme/target/trace.h +++ b/drivers/nvme/target/trace.h @@ -131,6 +131,29 @@ TRACE_EVENT(nvmet_req_complete, ); +TRACE_EVENT(nvmet_fdp_write_translate, + TP_PROTO(struct nvmet_req *req, u16 pid, u8 stream), + TP_ARGS(req, pid, stream), + TP_STRUCT__entry( + __field(u16, ctrl_id) + __array(char, disk, DISK_NAME_LEN) + __field(u32, nsid) + __field(u16, pid) + __field(u8, stream) + ), + TP_fast_assign( + __entry->ctrl_id = nvmet_req_to_ctrl_id(req); + __assign_req_name(__entry->disk, req); + __entry->nsid = req->ns->nsid; + __entry->pid = pid; + __entry->stream = stream; + ), + TP_printk("nvmet%s: %snsid=%u, pid=%u, write_stream=%u", + __print_ctrl_id(__entry->ctrl_id), + __print_disk_name(__entry->disk), + __entry->nsid, __entry->pid, __entry->stream) +); + #define aer_name(aer) { aer, #aer } TRACE_EVENT(nvmet_async_event, -- 2.43.7