From: Niklas Cassel
Many CNS commands have "allocated" command variants. These include
a namespace as long as it is allocated, that is a namespace is
included regardless if it is active (attached) or not.
While these commands are optional (they are mandatory for controllers
supporting the namespace attachment command), our QEMU implementation
is more complete by actually providing support for these CNS values.
However, since our QEMU model currently does not support the namespace
attachment command, these new allocated CNS commands will return the
same result as the active CNS command variants.
In NVMe, a namespace is active if it exists and is attached to the
controller.
Add a new Boolean namespace flag, "attached", to provide the most
basic namespace attachment support. The default value for this new
flag is true. Also, implement the logic in the new CNS values to
include/exclude namespaces based on this new property. The only thing
missing is hooking up the actual Namespace Attachment command opcode,
which will allow a user to toggle the "attached" flag per namespace.
The reason for not hooking up this command completely is because the
NVMe specification requires the namespace management command to be
supported if the namespace attachment command is supported.
Signed-off-by: Niklas Cassel
Signed-off-by: Dmitry Fomichev
Reviewed-by: Keith Busch
---
hw/block/nvme-ns.c | 1 +
hw/block/nvme-ns.h | 1 +
hw/block/nvme.c | 68
include/block/nvme.h | 20 +++--
4 files changed, 70 insertions(+), 20 deletions(-)
diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
index c0362426cc..e191ef9be0 100644
--- a/hw/block/nvme-ns.c
+++ b/hw/block/nvme-ns.c
@@ -42,6 +42,7 @@ static void nvme_ns_init(NvmeNamespace *ns)
id_ns->nsze = cpu_to_le64(nvme_ns_nlbas(ns));
ns->csi = NVME_CSI_NVM;
+ns->attached = true;
/* no thin provisioning */
id_ns->ncap = id_ns->nsze;
diff --git a/hw/block/nvme-ns.h b/hw/block/nvme-ns.h
index d795e44bab..2d9cd29d07 100644
--- a/hw/block/nvme-ns.h
+++ b/hw/block/nvme-ns.h
@@ -31,6 +31,7 @@ typedef struct NvmeNamespace {
int64_t size;
NvmeIdNs id_ns;
const uint32_t *iocs;
+bool attached;
uint8_t csi;
NvmeNamespaceParams params;
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index d9e9fd264c..7b3eafad03 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1084,6 +1084,9 @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest *req)
if (unlikely(!req->ns)) {
return NVME_INVALID_FIELD | NVME_DNR;
}
+if (!req->ns->attached) {
+return NVME_INVALID_FIELD | NVME_DNR;
+}
if (!(req->ns->iocs[req->cmd.opcode] & NVME_CMD_EFF_CSUPP)) {
trace_pci_nvme_err_invalid_opc(req->cmd.opcode);
@@ -1245,6 +1248,7 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae,
uint32_t buf_len,
uint32_t trans_len;
NvmeNamespace *ns;
time_t current_ms;
+int i;
if (off >= sizeof(smart)) {
return NVME_INVALID_FIELD | NVME_DNR;
@@ -1255,15 +1259,18 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t
rae, uint32_t buf_len,
if (!ns) {
return NVME_INVALID_NSID | NVME_DNR;
}
-nvme_set_blk_stats(ns, );
+if (ns->attached) {
+nvme_set_blk_stats(ns, );
+}
} else {
-int i;
-
for (i = 1; i <= n->num_namespaces; i++) {
ns = nvme_ns(n, i);
if (!ns) {
continue;
}
+if (!ns->attached) {
+continue;
+}
nvme_set_blk_stats(ns, );
}
}
@@ -1560,7 +1567,8 @@ static uint16_t nvme_identify_ctrl_csi(NvmeCtrl *n,
NvmeRequest *req)
return NVME_INVALID_FIELD | NVME_DNR;
}
-static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
+static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req,
+ bool only_active)
{
NvmeNamespace *ns;
NvmeIdentify *c = (NvmeIdentify *)>cmd;
@@ -1577,11 +1585,16 @@ static uint16_t nvme_identify_ns(NvmeCtrl *n,
NvmeRequest *req)
return nvme_rpt_empty_id_struct(n, req);
}
+if (only_active && !ns->attached) {
+return nvme_rpt_empty_id_struct(n, req);
+}
+
return nvme_dma(n, (uint8_t *)>id_ns, sizeof(NvmeIdNs),
DMA_DIRECTION_FROM_DEVICE, req);
}
-static uint16_t nvme_identify_ns_csi(NvmeCtrl *n, NvmeRequest *req)
+static uint16_t nvme_identify_ns_csi(NvmeCtrl *n, NvmeRequest *req,
+ bool only_active)
{
NvmeNamespace *ns;
NvmeIdentify *c = (NvmeIdentify *)>cmd;
@@ -1598,6 +1611,10 @@ static uint16_t nvme_identify_ns_csi(NvmeCtrl *n,
NvmeRequest *req)
return nvme_rpt_empty_id_struct(n, req);
}
+if (only_active && !ns->attached) {
+return nvme_rpt_empty_id_struct(n, req);
+}
+
