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Sat, 21 Mar 2026 15:28:44 +0000 (GMT) From: Nilay Shroff To: linux-nvme@lists.infradead.org Cc: dwagner@suse.de, hare@suse.com, kbusch@kernel.org, hch@lst.de, gjoyce@ibm.com, wenxiong@linux.ibm.com, Nilay Shroff Subject: [PATCH 3/9] libnvme: annotate nvme_subsystem::iopolicy with !accessors:none Date: Sat, 21 Mar 2026 20:58:02 +0530 Message-ID: <20260321152823.3197870-4-nilay@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260321152823.3197870-1-nilay@linux.ibm.com> References: <20260321152823.3197870-1-nilay@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=IqITsb/g c=1 sm=1 tr=0 ts=69beb934 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=i8JyOrThOiZbpa8wNwIA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIxMDEyOSBTYWx0ZWRfX2F1Ry9VkPiB9 y+zT7gzyRvg51AwN3rXHxEVtgp+uy4Slt40bf45QQtTCMykPzqobCwLOMwLg0oBx9uCRmP7dKWr kS6DKbYEySWhAZXf0bmoxOt7EhmLoFhmEbW5rZXSlcIqS3o2gjOCWL5Eds59o2XGlgBIlFw1RIo P03m1H0dUOm/7wocwh7Vtl4EHK2MqdNSTyFLg1bIPtdpi5dNBeHtPJOaQVWVMCcMPrhbMSzVpL6 bo1ySepDAay6WQCPwTHdzLny1tAotlQpIO/7QkvQ70Ru6nFdFPrMcvAGzBF4NF7Vo8xdM2WlFye ysO69wrRjv+uL8sh5Bh14xMPVb+BtbJCoFFBA8qVjZeBSbqmN/v6bBfk8XFb89JpHfj7JPErdic KkOuXAit74NzdERCxsfiPyBuex39lmG6BtDsJ/p0PBjJAHBet1joNp22cdYWXt/GKHPWJsbENvR A1fJRoBf6bzXjw8i6Vg== X-Proofpoint-GUID: 6pHlM2QUzTImg6AphrmtOB07JThkCU7d X-Proofpoint-ORIG-GUID: 6pHlM2QUzTImg6AphrmtOB07JThkCU7d X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-21_05,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 spamscore=0 impostorscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603210129 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260321_082901_058330_060CBCB4 X-CRM114-Status: GOOD ( 15.80 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org The default accessor generation creates getters that return cached attribute values. However, for nvme_subsystem::iopolicy, a real-time (non-cached) value is required. This is particularly useful for tools such as nvme-top, which rely on up-to-date information for displaying a real-time dashboard. Annotate nvme_subsystem::iopolicy with "!accessors:none" to disable the auto-generated accessor, and provide a custom implementation of nvme_subsystem_get_iopolicy() that returns the current value. Signed-off-by: Nilay Shroff --- libnvme/src/accessors.ld | 2 -- libnvme/src/libnvme.ld | 1 + libnvme/src/nvme/accessors.c | 13 ------------- libnvme/src/nvme/accessors.h | 17 ----------------- libnvme/src/nvme/private.h | 2 +- libnvme/src/nvme/tree.c | 15 +++++++++++++++ libnvme/src/nvme/tree.h | 8 ++++++++ 7 files changed, 25 insertions(+), 33 deletions(-) diff --git a/libnvme/src/accessors.ld b/libnvme/src/accessors.ld index 433767191..56348a7e5 100644 --- a/libnvme/src/accessors.ld +++ b/libnvme/src/accessors.ld @@ -77,8 +77,6 @@ LIBNVME_ACCESSORS_3 { nvme_subsystem_get_subsystype; nvme_subsystem_get_application; nvme_subsystem_set_application; - nvme_subsystem_get_iopolicy; - nvme_subsystem_set_iopolicy; nvme_host_get_hostnqn; nvme_host_get_hostid; nvme_host_get_dhchap_host_key; diff --git a/libnvme/src/libnvme.ld b/libnvme/src/libnvme.ld index 41a170083..f842eb770 100644 --- a/libnvme/src/libnvme.ld +++ b/libnvme/src/libnvme.ld @@ -176,6 +176,7 @@ LIBNVME_3 { nvme_subsystem_first_ns; nvme_get_subsystem; nvme_subsystem_get_host; + nvme_subsystem_get_iopolicy; nvme_subsystem_lookup_namespace; nvme_subsystem_next_ctrl; nvme_subsystem_next_ns; diff --git a/libnvme/src/nvme/accessors.c b/libnvme/src/nvme/accessors.c index a98f26234..55fd11320 100644 --- a/libnvme/src/nvme/accessors.c +++ b/libnvme/src/nvme/accessors.c @@ -404,19 +404,6 @@ __public const char *nvme_subsystem_get_application( return p->application; } -__public void nvme_subsystem_set_iopolicy( - struct nvme_subsystem *p, - const char *iopolicy) -{ - free(p->iopolicy); - p->iopolicy = iopolicy ? strdup(iopolicy) : NULL; -} - -__public const char *nvme_subsystem_get_iopolicy(const struct nvme_subsystem *p) -{ - return p->iopolicy; -} - /**************************************************************************** * Accessors for: struct nvme_host ****************************************************************************/ diff --git a/libnvme/src/nvme/accessors.h b/libnvme/src/nvme/accessors.h index f9323ad11..9ea96a634 100644 --- a/libnvme/src/nvme/accessors.h +++ b/libnvme/src/nvme/accessors.h @@ -575,23 +575,6 @@ void nvme_subsystem_set_application( */ const char *nvme_subsystem_get_application(const struct nvme_subsystem *p); -/** - * nvme_subsystem_set_iopolicy() - Set iopolicy. - * @p: The &struct nvme_subsystem instance to update. - * @iopolicy: New string; a copy is stored. Pass NULL to clear. - */ -void nvme_subsystem_set_iopolicy( - struct nvme_subsystem *p, - const char *iopolicy); - -/** - * nvme_subsystem_get_iopolicy() - Get iopolicy. - * @p: The &struct nvme_subsystem instance to query. - * - * Return: The value of the iopolicy field, or NULL if not set. - */ -const char *nvme_subsystem_get_iopolicy(const struct nvme_subsystem *p); - /**************************************************************************** * Accessors for: struct nvme_host ****************************************************************************/ diff --git a/libnvme/src/nvme/private.h b/libnvme/src/nvme/private.h index dcd9079dd..84852c8b0 100644 --- a/libnvme/src/nvme/private.h +++ b/libnvme/src/nvme/private.h @@ -230,7 +230,7 @@ struct nvme_subsystem { /*!generate-accessors*/ char *firmware; /*!accessors:readonly*/ char *subsystype; /*!accessors:readonly*/ char *application; - char *iopolicy; + char *iopolicy; //!accessors:none }; struct nvme_host { /*!generate-accessors*/ diff --git a/libnvme/src/nvme/tree.c b/libnvme/src/nvme/tree.c index 2984d0ff7..18aabe044 100644 --- a/libnvme/src/nvme/tree.c +++ b/libnvme/src/nvme/tree.c @@ -445,6 +445,21 @@ __public nvme_host_t nvme_subsystem_get_host(nvme_subsystem_t s) return s->h; } +__public char *nvme_subsystem_get_iopolicy(nvme_subsystem_t s) +{ + _cleanup_free_ char *iopolicy = NULL; + + iopolicy = nvme_get_subsys_attr(s, "iopolicy"); + if (iopolicy) { + if (!s->iopolicy || strcmp(iopolicy, s->iopolicy)) { + free(s->iopolicy); + s->iopolicy = strdup(iopolicy); + } + } + + return s->iopolicy; +} + __public nvme_ns_t nvme_subsystem_first_ns(nvme_subsystem_t s) { return list_top(&s->namespaces, struct nvme_ns, entry); diff --git a/libnvme/src/nvme/tree.h b/libnvme/src/nvme/tree.h index 1240f3023..39d715508 100644 --- a/libnvme/src/nvme/tree.h +++ b/libnvme/src/nvme/tree.h @@ -212,6 +212,14 @@ void nvme_free_subsystem(struct nvme_subsystem *s); */ nvme_host_t nvme_subsystem_get_host(nvme_subsystem_t s); +/** + * nvme_subsystem_get_iopolicy() - Get subsystem iopolicy name + * @s: subsystem + * + * Return: The iopolicy configured in subsystem @s + */ +char *nvme_subsystem_get_iopolicy(nvme_subsystem_t s); + /** * nvme_ctrl_first_ns() - Start namespace iterator * @c: Controller instance -- 2.53.0