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Mon, 19 Feb 2024 13:15:34 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id /sVPB3ZU02X5AgAAn2gu4w (envelope-from ); Mon, 19 Feb 2024 13:15:34 +0000 From: Daniel Wagner To: James Smart Cc: Keith Busch , Christoph Hellwig , Sagi Grimberg , Hannes Reinecke , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, Daniel Wagner Subject: [PATCH v1 1/6] nvme-fabrics: introduce connect_sync option Date: Mon, 19 Feb 2024 14:15:26 +0100 Message-ID: <20240219131531.15134-2-dwagner@suse.de> X-Mailer: git-send-email 2.43.1 In-Reply-To: <20240219131531.15134-1-dwagner@suse.de> References: <20240219131531.15134-1-dwagner@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b="eE23rC/C"; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=WuXpm3P8 X-Spamd-Result: default: False [1.69 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:98:from]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+]; MX_GOOD(-0.01)[]; RCPT_COUNT_SEVEN(0.00)[8]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Score: 1.69 X-Rspamd-Queue-Id: 358991F7FB X-Spam-Level: * X-Spam-Flag: NO X-Spamd-Bar: + Content-Type: text/plain; charset="utf-8" The TCP and RDMA transport are doing a synchronous connect, meaning the syscal returns with the final result, that is. it either failed or succeeded. This isn't the case for FC. This transport just setups and triggers the connect and returns without waiting on the result. Introduce a flag to allow user space to control the behavior, wait or don't wait. Signed-off-by: Daniel Wagner --- drivers/nvme/host/fabrics.c | 6 +++++- drivers/nvme/host/fabrics.h | 3 +++ 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index 3499acbf6a82..7d33f0f5824f 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -678,6 +678,7 @@ static const match_table_t opt_tokens =3D { #ifdef CONFIG_NVME_TCP_TLS { NVMF_OPT_TLS, "tls" }, #endif + { NVMF_OPT_CONNECT_SYNC, "connect_sync" }, { NVMF_OPT_ERR, NULL } }; =20 @@ -1024,6 +1025,9 @@ static int nvmf_parse_options(struct nvmf_ctrl_option= s *opts, } opts->tls =3D true; break; + case NVMF_OPT_CONNECT_SYNC: + opts->connect_sync =3D true; + break; default: pr_warn("unknown parameter or missing value '%s' in ctrl creation reque= st\n", p); @@ -1245,7 +1249,7 @@ EXPORT_SYMBOL_GPL(nvmf_free_options); NVMF_OPT_HOST_ID | NVMF_OPT_DUP_CONNECT |\ NVMF_OPT_DISABLE_SQFLOW | NVMF_OPT_DISCOVERY |\ NVMF_OPT_FAIL_FAST_TMO | NVMF_OPT_DHCHAP_SECRET |\ - NVMF_OPT_DHCHAP_CTRL_SECRET) + NVMF_OPT_DHCHAP_CTRL_SECRET | NVMF_OPT_CONNECT_SYNC) =20 static struct nvme_ctrl * nvmf_create_ctrl(struct device *dev, const char *buf) diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h index 06cc54851b1b..01d3ef545f14 100644 --- a/drivers/nvme/host/fabrics.h +++ b/drivers/nvme/host/fabrics.h @@ -73,6 +73,7 @@ enum { NVMF_OPT_TLS =3D 1 << 25, NVMF_OPT_KEYRING =3D 1 << 26, NVMF_OPT_TLS_KEY =3D 1 << 27, + NVMF_OPT_CONNECT_SYNC =3D 1 << 28, }; =20 /** @@ -115,6 +116,7 @@ enum { * @nr_poll_queues: number of queues for polling I/O * @tos: type of service * @fast_io_fail_tmo: Fast I/O fail timeout in seconds + * @connect_sync: wait for connect attempt(s) to succeed or fail */ struct nvmf_ctrl_options { unsigned mask; @@ -144,6 +146,7 @@ struct nvmf_ctrl_options { unsigned int nr_poll_queues; int tos; int fast_io_fail_tmo; + bool connect_sync; }; =20 /* --=20 2.43.1