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nvme: bring back auto-removal of deleted namespaces during sequential scan 

Bring back the check of the Identify Namespace return value for the
legacy NVMe 1.0-style sequential scanning.  While NVMe 1.0 does not
support namespace management, there are "modern" cloud solutions like
Google Cloud Platform that claim the obsolete 1.0 compliance for no
good reason while supporting proprietary sideband namespace management.

Fixes: 1a893c2bfe ("nvme: refactor namespace probing")
Reported-by: Nils Hanke <nh@edgeless.systems>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Nils Hanke <nh@edgeless.systems>
This commit is contained in:
Christoph Hellwig 2023-02-21 14:02:25 -08:00
parent c0c33b94cf
commit 0dd6fff2aa
1 changed files with 18 additions and 17 deletions
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35
drivers/nvme/host/core.c
View File

@ -38,6 +38,7 @@ struct nvme_ns_info {
bool is_shared;
bool is_readonly;
bool is_ready;
bool is_removed;
};
unsigned int admin_timeout = 60;
@ -1402,16 +1403,8 @@ static int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid,
error = nvme_submit_sync_cmd(ctrl->admin_q, &c, *id, sizeof(**id));
if (error) {
dev_warn(ctrl->device, "Identify namespace failed (%d)\n", error);
goto out_free_id;
kfree(*id);
}
error = NVME_SC_INVALID_NS | NVME_SC_DNR;
if ((*id)->ncap == 0) /* namespace not allocated or attached */
goto out_free_id;
return 0;
out_free_id:
kfree(*id);
return error;
}
@ -1425,6 +1418,13 @@ static int nvme_ns_info_from_identify(struct nvme_ctrl *ctrl,
ret = nvme_identify_ns(ctrl, info->nsid, &id);
if (ret)
return ret;
if (id->ncap == 0) {
/* namespace not allocated or attached */
info->is_removed = true;
return -ENODEV;
}
info->anagrpid = id->anagrpid;
info->is_shared = id->nmic & NVME_NS_NMIC_SHARED;
info->is_readonly = id->nsattr & NVME_NS_ATTR_RO;
@ -4429,6 +4429,7 @@ static void nvme_scan_ns(struct nvme_ctrl *ctrl, unsigned nsid)
{
struct nvme_ns_info info = { .nsid = nsid };
struct nvme_ns *ns;
int ret;
if (nvme_identify_ns_descs(ctrl, &info))
return;
@ -4445,19 +4446,19 @@ static void nvme_scan_ns(struct nvme_ctrl *ctrl, unsigned nsid)
* set up a namespace. If not fall back to the legacy version.
*/
if ((ctrl->cap & NVME_CAP_CRMS_CRIMS) ||
(info.ids.csi != NVME_CSI_NVM && info.ids.csi != NVME_CSI_ZNS)) {
if (nvme_ns_info_from_id_cs_indep(ctrl, &info))
return;
} else {
if (nvme_ns_info_from_identify(ctrl, &info))
return;
}
(info.ids.csi != NVME_CSI_NVM && info.ids.csi != NVME_CSI_ZNS))
ret = nvme_ns_info_from_id_cs_indep(ctrl, &info);
else
ret = nvme_ns_info_from_identify(ctrl, &info);
if (info.is_removed)
nvme_ns_remove_by_nsid(ctrl, nsid);
/*
* Ignore the namespace if it is not ready. We will get an AEN once it
* becomes ready and restart the scan.
*/
if (!info.is_ready)
if (ret || !info.is_ready)
return;
ns = nvme_find_get_ns(ctrl, nsid);