Author: imp Date: Fri Aug 4 03:40:01 2017 New Revision: 322036 URL: https://svnweb.freebsd.org/changeset/base/322036
Log: Make nvd vs nda choice boot-time rather than build-time Introduce hw.nvme.use_nvd tunable. This tunable allows both nvd and nda to be installed in the kernel, while allowing only one of them to create devices. This is an all-or-nothing setting, and you can't change it after boot-time. However, it will allow easier A/B testing. Differential Revision: https://reviews.freebsd.org/D11825 Modified: head/sys/conf/files head/sys/conf/files.amd64 head/sys/dev/nvd/nvd.c head/sys/dev/nvme/nvme.h head/sys/dev/nvme/nvme_sim.c head/sys/dev/nvme/nvme_sysctl.c Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Fri Aug 4 03:20:01 2017 (r322035) +++ head/sys/conf/files Fri Aug 4 03:40:01 2017 (r322036) @@ -86,9 +86,9 @@ cam/cam_xpt.c optional scbus cam/ata/ata_all.c optional scbus cam/ata/ata_xpt.c optional scbus cam/ata/ata_pmp.c optional scbus -cam/nvme/nvme_all.c optional scbus nvme !nvd -cam/nvme/nvme_da.c optional scbus nvme da !nvd -cam/nvme/nvme_xpt.c optional scbus nvme !nvd +cam/nvme/nvme_all.c optional scbus nvme +cam/nvme/nvme_da.c optional scbus nvme da +cam/nvme/nvme_xpt.c optional scbus nvme cam/scsi/scsi_xpt.c optional scbus cam/scsi/scsi_all.c optional scbus cam/scsi/scsi_cd.c optional cd Modified: head/sys/conf/files.amd64 ============================================================================== --- head/sys/conf/files.amd64 Fri Aug 4 03:20:01 2017 (r322035) +++ head/sys/conf/files.amd64 Fri Aug 4 03:40:01 2017 (r322036) @@ -341,7 +341,7 @@ dev/nvme/nvme_ctrlr_cmd.c optional nvme dev/nvme/nvme_ns.c optional nvme dev/nvme/nvme_ns_cmd.c optional nvme dev/nvme/nvme_qpair.c optional nvme -dev/nvme/nvme_sim.c optional nvme scbus !nvd +dev/nvme/nvme_sim.c optional nvme scbus dev/nvme/nvme_sysctl.c optional nvme dev/nvme/nvme_test.c optional nvme dev/nvme/nvme_util.c optional nvme Modified: head/sys/dev/nvd/nvd.c ============================================================================== --- head/sys/dev/nvd/nvd.c Fri Aug 4 03:20:01 2017 (r322035) +++ head/sys/dev/nvd/nvd.c Fri Aug 4 03:40:01 2017 (r322036) @@ -134,6 +134,8 @@ MODULE_DEPEND(nvd, nvme, 1, 1, 1); static int nvd_load() { + if (!nvme_use_nvd) + return 0; TAILQ_INIT(&ctrlr_head); TAILQ_INIT(&disk_head); @@ -149,6 +151,9 @@ nvd_unload() { struct nvd_controller *ctrlr; struct nvd_disk *disk; + + if (!nvme_use_nvd) + return; while (!TAILQ_EMPTY(&ctrlr_head)) { ctrlr = TAILQ_FIRST(&ctrlr_head); Modified: head/sys/dev/nvme/nvme.h ============================================================================== --- head/sys/dev/nvme/nvme.h Fri Aug 4 03:20:01 2017 (r322035) +++ head/sys/dev/nvme/nvme.h Fri Aug 4 03:40:01 2017 (r322036) @@ -1003,6 +1003,8 @@ void nvme_ns_trim_cmd(struct nvme_command *cmd, uint16 cmd->cdw11 = NVME_DSM_ATTR_DEALLOCATE; } +extern int nvme_use_nvd; + #endif /* _KERNEL */ #endif /* __NVME_H__ */ Modified: head/sys/dev/nvme/nvme_sim.c ============================================================================== --- head/sys/dev/nvme/nvme_sim.c Fri Aug 4 03:20:01 2017 (r322035) +++ head/sys/dev/nvme/nvme_sim.c Fri Aug 4 03:40:01 2017 (r322036) @@ -371,6 +371,8 @@ struct nvme_consumer *consumer_cookie; static void nvme_sim_init(void) { + if (nvme_use_nvd) + return; consumer_cookie = nvme_register_consumer(nvme_sim_new_ns, nvme_sim_new_controller, NULL, nvme_sim_controller_fail); @@ -382,6 +384,8 @@ SYSINIT(nvme_sim_register, SI_SUB_DRIVERS, SI_ORDER_AN static void nvme_sim_uninit(void) { + if (nvme_use_nvd) + return; /* XXX Cleanup */ nvme_unregister_consumer(consumer_cookie); Modified: head/sys/dev/nvme/nvme_sysctl.c ============================================================================== --- head/sys/dev/nvme/nvme_sysctl.c Fri Aug 4 03:20:01 2017 (r322035) +++ head/sys/dev/nvme/nvme_sysctl.c Fri Aug 4 03:40:01 2017 (r322036) @@ -33,6 +33,12 @@ __FBSDID("$FreeBSD$"); #include "nvme_private.h" +int nvme_use_nvd = 1; + +SYSCTL_NODE(_hw, OID_AUTO, nvme, CTLFLAG_RD, 0, "NVMe sysctl tunables"); +SYSCTL_INT(_hw_nvme, OID_AUTO, use_nvd, CTLFLAG_RDTUN, + &nvme_use_nvd, 1, "1 = Create NVD devices, 0 = Create NDA devices"); + /* * CTLTYPE_S64 and sysctl_handle_64 were added in r217616. Define these * explicitly here for older kernels that don't include the r217616 _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
