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nda(4) fix check for Dataset Management support

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In the nda(4) driver, only set DISKFLAG_CANDELETE (a.k.a. can support
BIO_DELETE) if the drive supports Dataset Management. There are reports
that without this check, VMWare Workstation does not work reliably.

Fix is to check the ONCS field in the NVMe Controller Data structure for
support. This check previously existed but did not survive the
big-endian changes.

Reported by: yuripv@yuripv.net
Reviewed by: imp, mav, jimharris
Approved by: imp (mentor)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D18493
This commit is contained in:
Chuck Tuffli 2018-12-13 13:25:37 +00:00
parent 32ab5aa1fd
commit 87b3975e36
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=342046
3 changed files with 9 additions and 6 deletions
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2
sys/cam/nvme/nvme_da.c
View File

@ -798,7 +798,7 @@ ndaregister(struct cam_periph *periph, void *arg)
disk->d_mediasize = (off_t)(disk->d_sectorsize * nsd->nsze);
disk->d_delmaxsize = disk->d_mediasize;
disk->d_flags = DISKFLAG_DIRECT_COMPLETION;
// if (cd->oncs.dsm) // XXX broken?
if (nvme_ctrlr_has_dataset_mgmt(cd))
disk->d_flags |= DISKFLAG_CANDELETE;
vwc_present = (cd->vwc >> NVME_CTRLR_DATA_VWC_PRESENT_SHIFT) &
NVME_CTRLR_DATA_VWC_PRESENT_MASK;

7
sys/dev/nvme/nvme.h
View File

@ -1259,6 +1259,13 @@ void nvme_unregister_consumer(struct nvme_consumer *consumer);
device_t nvme_ctrlr_get_device(struct nvme_controller *ctrlr);
const struct nvme_controller_data *
nvme_ctrlr_get_data(struct nvme_controller *ctrlr);
static inline bool
nvme_ctrlr_has_dataset_mgmt(const struct nvme_controller_data *cd)
{
/* Assumes cd was byte swapped by nvme_controller_data_swapbytes() */
return ((cd->oncs >> NVME_CTRLR_DATA_ONCS_DSM_SHIFT) &
NVME_CTRLR_DATA_ONCS_DSM_MASK);
}
/* Namespace helper functions */
uint32_t nvme_ns_get_max_io_xfer_size(struct nvme_namespace *ns);

6
sys/dev/nvme/nvme_ns.c
View File

@ -498,8 +498,6 @@ nvme_ns_construct(struct nvme_namespace *ns, uint32_t id,
struct nvme_completion_poll_status status;
int res;
int unit;
uint16_t oncs;
uint8_t dsm;
uint8_t flbas_fmt;
uint8_t vwc_present;
@ -569,9 +567,7 @@ nvme_ns_construct(struct nvme_namespace *ns, uint32_t id,
return (ENXIO);
}
oncs = ctrlr->cdata.oncs;
dsm = (oncs >> NVME_CTRLR_DATA_ONCS_DSM_SHIFT) & NVME_CTRLR_DATA_ONCS_DSM_MASK;
if (dsm)
if (nvme_ctrlr_has_dataset_mgmt(&ctrlr->cdata))
ns->flags |= NVME_NS_DEALLOCATE_SUPPORTED;
vwc_present = (ctrlr->cdata.vwc >> NVME_CTRLR_DATA_VWC_PRESENT_SHIFT) &