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nvme fixes for Linux 6.12

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- Spec compliant identification fix (Keith)
  - Module parameter to enable backward compatibility on unusual
    namespace formats (Keith)
  - Target double free fix when using keys (Vitaliy)
  - Passthrough command error handling fix (Keith)
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Merge tag 'nvme-6.12-2024-10-31' of git://git.infradead.org/nvme into block-6.12

Pull NVMe fixes from Keith:

"nvme fixes for Linux 6.12

 - Spec compliant identification fix (Keith)
 - Module parameter to enable backward compatibility on unusual
   namespace formats (Keith)
 - Target double free fix when using keys (Vitaliy)
 - Passthrough command error handling fix (Keith)"

* tag 'nvme-6.12-2024-10-31' of git://git.infradead.org/nvme:
  nvme: re-fix error-handling for io_uring nvme-passthrough
  nvmet-auth: assign dh_key to NULL after kfree_sensitive
  nvme: module parameter to disable pi with offsets
  nvme: enhance cns version checking
This commit is contained in:
Jens Axboe 2024-10-31 09:10:07 -06:00
commit d0c6cc6c6a
3 changed files with 48 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/nvme/host/core.c
View File

@ -91,6 +91,17 @@ module_param(apst_secondary_latency_tol_us, ulong, 0644);
MODULE_PARM_DESC(apst_secondary_latency_tol_us,
"secondary APST latency tolerance in us");
/*
* Older kernels didn't enable protection information if it was at an offset.
* Newer kernels do, so it breaks reads on the upgrade if such formats were
* used in prior kernels since the metadata written did not contain a valid
* checksum.
*/
static bool disable_pi_offsets = false;
module_param(disable_pi_offsets, bool, 0444);
MODULE_PARM_DESC(disable_pi_offsets,
"disable protection information if it has an offset");
/*
* nvme_wq - hosts nvme related works that are not reset or delete
* nvme_reset_wq - hosts nvme reset works
@ -1390,17 +1401,30 @@ static void nvme_update_keep_alive(struct nvme_ctrl *ctrl,
nvme_start_keep_alive(ctrl);
}
/*
* In NVMe 1.0 the CNS field was just a binary controller or namespace
* flag, thus sending any new CNS opcodes has a big chance of not working.
* Qemu unfortunately had that bug after reporting a 1.1 version compliance
* (but not for any later version).
*/
static bool nvme_ctrl_limited_cns(struct nvme_ctrl *ctrl)
static bool nvme_id_cns_ok(struct nvme_ctrl *ctrl, u8 cns)
{
if (ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)
return ctrl->vs < NVME_VS(1, 2, 0);
return ctrl->vs < NVME_VS(1, 1, 0);
/*
* The CNS field occupies a full byte starting with NVMe 1.2
*/
if (ctrl->vs >= NVME_VS(1, 2, 0))
return true;
/*
* NVMe 1.1 expanded the CNS value to two bits, which means values
* larger than that could get truncated and treated as an incorrect
* value.
*
* Qemu implemented 1.0 behavior for controllers claiming 1.1
* compliance, so they need to be quirked here.
*/
if (ctrl->vs >= NVME_VS(1, 1, 0) &&
!(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS))
return cns <= 3;
/*
* NVMe 1.0 used a single bit for the CNS value.
*/
return cns <= 1;
}
static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id)
@ -1913,8 +1937,12 @@ static void nvme_configure_metadata(struct nvme_ctrl *ctrl,
if (head->pi_size && head->ms >= head->pi_size)
head->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
if (!(id->dps & NVME_NS_DPS_PI_FIRST))
info->pi_offset = head->ms - head->pi_size;
if (!(id->dps & NVME_NS_DPS_PI_FIRST)) {
if (disable_pi_offsets)
head->pi_type = 0;
else
info->pi_offset = head->ms - head->pi_size;
}
if (ctrl->ops->flags & NVME_F_FABRICS) {
/*
@ -3104,7 +3132,7 @@ static int nvme_init_non_mdts_limits(struct nvme_ctrl *ctrl)
ctrl->max_zeroes_sectors = 0;
if (ctrl->subsys->subtype != NVME_NQN_NVME ||
nvme_ctrl_limited_cns(ctrl) ||
!nvme_id_cns_ok(ctrl, NVME_ID_CNS_CS_CTRL) ||
test_bit(NVME_CTRL_SKIP_ID_CNS_CS, &ctrl->flags))
return 0;
@ -4200,7 +4228,7 @@ static void nvme_scan_work(struct work_struct *work)
}
mutex_lock(&ctrl->scan_lock);
if (nvme_ctrl_limited_cns(ctrl)) {
if (!nvme_id_cns_ok(ctrl, NVME_ID_CNS_NS_ACTIVE_LIST)) {
nvme_scan_ns_sequential(ctrl);
} else {
/*

7
drivers/nvme/host/ioctl.c
View File

@ -421,10 +421,13 @@ static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req,
struct io_uring_cmd *ioucmd = req->end_io_data;
struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
if (nvme_req(req)->flags & NVME_REQ_CANCELLED) {
pdu->status = -EINTR;
else
} else {
pdu->status = nvme_req(req)->status;
if (!pdu->status)
pdu->status = blk_status_to_errno(err);
}
pdu->result = le64_to_cpu(nvme_req(req)->result.u64);
/*

1
drivers/nvme/target/auth.c
View File

@ -115,6 +115,7 @@ int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id)
pr_debug("%s: ctrl %d failed to generate private key, err %d\n",
__func__, ctrl->cntlid, ret);
kfree_sensitive(ctrl->dh_key);
ctrl->dh_key = NULL;
return ret;
}
ctrl->dh_keysize = crypto_kpp_maxsize(ctrl->dh_tfm);