| Message ID | 20181130233423.26556-6-ddiss@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | target: user configurable T10 Vendor ID | expand |
On 12/1/18 12:34 AM, David Disseldorp wrote: > Initialise the t10_wwn vendor, model and revision defaults when a > device is allocated instead of when it's enabled. This ensures that > custom vendor or model strings set prior to enablement are not later > overwritten with default values. > > Signed-off-by: David Disseldorp <ddiss@suse.de> > --- > drivers/target/target_core_device.c | 34 +++++++++++++++++----------------- > 1 file changed, 17 insertions(+), 17 deletions(-) > > diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c > index 5512871f50e4..6318d59a1564 100644 > --- a/drivers/target/target_core_device.c > +++ b/drivers/target/target_core_device.c > @@ -810,6 +810,23 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) > mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); > xcopy_lun->lun_tpg = &xcopy_pt_tpg; > > + /* > + * Preload the initial INQUIRY const values if we are doing > + * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI > + * passthrough because this is being provided by the backend LLD. > + */ > + BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); > + BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); > + BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); > + if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { > + strlcpy(dev->t10_wwn.vendor, "LIO-ORG", > + sizeof(dev->t10_wwn.vendor)); > + strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, > + sizeof(dev->t10_wwn.model)); > + strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, > + sizeof(dev->t10_wwn.revision)); > + } > + > return dev; > } > This is odd. I'd rather have it consistent across backends, ie either move the initialisation into the backends, or provide a means to check if the inquiry data has already been pre-filled. But this check really is awkward. Cheers, Hannes
Hi Hannes, Thanks for the feedback... On Sat, 1 Dec 2018 15:59:25 +0100, Hannes Reinecke wrote: > On 12/1/18 12:34 AM, David Disseldorp wrote: ... > > @@ -810,6 +810,23 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) > > mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); > > xcopy_lun->lun_tpg = &xcopy_pt_tpg; > > > > + /* > > + * Preload the initial INQUIRY const values if we are doing > > + * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI > > + * passthrough because this is being provided by the backend LLD. > > + */ > > + BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); > > + BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); > > + BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); > > + if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { > > + strlcpy(dev->t10_wwn.vendor, "LIO-ORG", > > + sizeof(dev->t10_wwn.vendor)); > > + strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, > > + sizeof(dev->t10_wwn.model)); > > + strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, > > + sizeof(dev->t10_wwn.revision)); > > + } > > + > > return dev; > > } > > > This is odd. I'd rather have it consistent across backends, ie either > move the initialisation into the backends, or provide a means to check > if the inquiry data has already been pre-filled. > But this check really is awkward. Not quite sure I follow here. I could the default setting to the target_backend_ops.alloc_device() code paths, but I don't think the duplication would make this much cleaner, if at all. I can look into this further if you like (target_backend_ops.inquiry_rev could be dropped that way), but my preference would be to do so as a follow-up patch-set. Cheers, David
On Sun, 2 Dec 2018 23:22:23 +0100, David Disseldorp wrote: > > > + if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { > > > + strlcpy(dev->t10_wwn.vendor, "LIO-ORG", > > > + sizeof(dev->t10_wwn.vendor)); > > > + strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, > > > + sizeof(dev->t10_wwn.model)); > > > + strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, > > > + sizeof(dev->t10_wwn.revision)); > > > + } > > > + > > > return dev; > > > } > > > > > This is odd. I'd rather have it consistent across backends, ie either > > move the initialisation into the backends, or provide a means to check > > if the inquiry data has already been pre-filled. > > But this check really is awkward. > > Not quite sure I follow here. I could the default setting to the > target_backend_ops.alloc_device() code paths, but I don't think the > duplication would make this much cleaner, if at all. > I can look into this further if you like (target_backend_ops.inquiry_rev > could be dropped that way), Looking a little closer, I think we can drop the conditional completely and set the vendor/model/rev defaults for all cases here: - target_core_pscsi overwrites the defaults in the pscsi_configure_device() callback. + the contents is then only used for configfs via $pscsi_dev/info, $pscsi_dev/statistics/scsi_lu/vend, etc. - target_core_user doesn't touch the defaults, nor are they used for anything outside of configfs. > but my preference would be to do so as a > follow-up patch-set. This is still my preference. Cheers, David
On Sat, 2018-12-01 at 15:59 +0100, Hannes Reinecke wrote: > On 12/1/18 12:34 AM, David Disseldorp wrote: > > Initialise the t10_wwn vendor, model and revision defaults when a > > device is allocated instead of when it's enabled. This ensures that > > custom vendor or model strings set prior to enablement are not later > > overwritten with default values. > > > > Signed-off-by: David Disseldorp <ddiss@suse.de> > > --- > > drivers/target/target_core_device.c | 34 +++++++++++++++++----------------- > > 1 file changed, 17 insertions(+), 17 deletions(-) > > > diff --git a/drivers/target/target_core_device.c > > b/drivers/target/target_core_device.c > > index 5512871f50e4..6318d59a1564 100644 > > --- a/drivers/target/target_core_device.c > > +++ b/drivers/target/target_core_device.c > > @@ -810,6 +810,23 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) > > mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); > > xcopy_lun->lun_tpg = &xcopy_pt_tpg; > > > > + /* > > + * Preload the initial INQUIRY const values if we are doing > > + * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI > > + * passthrough because this is being provided by the backend LLD. > > + */ > > + BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); > > + BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); > > + BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); > > + if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { > > + strlcpy(dev->t10_wwn.vendor, "LIO-ORG", > > + sizeof(dev->t10_wwn.vendor)); > > + strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, > > + sizeof(dev->t10_wwn.model)); > > + strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, > > + sizeof(dev->t10_wwn.revision)); > > + } > > + > > return dev; > > } > > > > This is odd. I'd rather have it consistent across backends, ie either > move the initialisation into the backends, or provide a means to check > if the inquiry data has already been pre-filled. > But this check really is awkward. Agreed. I also would like to see that that if-condition is removed ... Thanks, Bart.
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 5512871f50e4..6318d59a1564 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -810,6 +810,23 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); xcopy_lun->lun_tpg = &xcopy_pt_tpg; + /* + * Preload the initial INQUIRY const values if we are doing + * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI + * passthrough because this is being provided by the backend LLD. + */ + BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); + BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); + BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); + if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { + strlcpy(dev->t10_wwn.vendor, "LIO-ORG", + sizeof(dev->t10_wwn.vendor)); + strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, + sizeof(dev->t10_wwn.model)); + strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, + sizeof(dev->t10_wwn.revision)); + } + return dev; } @@ -984,23 +1001,6 @@ int target_configure_device(struct se_device *dev) */ INIT_WORK(&dev->qf_work_queue, target_qf_do_work); - /* - * Preload the initial INQUIRY const values if we are doing - * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI - * passthrough because this is being provided by the backend LLD. - */ - BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); - BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); - BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); - if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { - strlcpy(dev->t10_wwn.vendor, "LIO-ORG", - sizeof(dev->t10_wwn.vendor)); - strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, - sizeof(dev->t10_wwn.model)); - strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, - sizeof(dev->t10_wwn.revision)); - } - scsi_dump_inquiry(dev); spin_lock(&hba->device_lock);
Initialise the t10_wwn vendor, model and revision defaults when a device is allocated instead of when it's enabled. This ensures that custom vendor or model strings set prior to enablement are not later overwritten with default values. Signed-off-by: David Disseldorp <ddiss@suse.de> --- drivers/target/target_core_device.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-)