From: Mike Christie Date: Tue, 28 Jun 2022 20:02:27 +0000 (-0500) Subject: scsi: target: Add callout to configure UNMAP settings X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6b206a5a8c2912c3c2174c5afc2f6e798d6ad212;p=linux.git scsi: target: Add callout to configure UNMAP settings Add a callout to configure a backend's UNMAP settings. This will be used to allow userspace to configure UNMAP after the initial device setup, similar to how we can set up the other attributes post device configuration. Link: https://lore.kernel.org/r/20220628200230.15052-3-michael.christie@oracle.com Reviewed-by: Christoph Hellwig Signed-off-by: Mike Christie Signed-off-by: Martin K. Petersen --- diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 25f33eb25337c..086ac9c9343c4 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -960,6 +960,12 @@ int target_configure_device(struct se_device *dev) ret = dev->transport->configure_device(dev); if (ret) goto out_free_index; + + if (dev->transport->configure_unmap && + dev->transport->configure_unmap(dev)) { + pr_debug("Discard support available, but disabled by default.\n"); + } + /* * XXX: there is not much point to have two different values here.. */ diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h index 773963a1e0b53..a3c193df25b32 100644 --- a/include/target/target_core_backend.h +++ b/include/target/target_core_backend.h @@ -37,6 +37,7 @@ struct target_backend_ops { struct se_dev_plug *(*plug_device)(struct se_device *se_dev); void (*unplug_device)(struct se_dev_plug *se_plug); + bool (*configure_unmap)(struct se_device *se_dev); ssize_t (*set_configfs_dev_params)(struct se_device *, const char *, ssize_t); ssize_t (*show_configfs_dev_params)(struct se_device *, char *);