@@ -399,6 +399,7 @@ static Property nvme_ns_props[] = {
DEFINE_BLOCK_PROPERTIES(NvmeNamespace, blkconf),
DEFINE_PROP_LINK("subsys", NvmeNamespace, subsys, TYPE_NVME_SUBSYS,
NvmeSubsystem *),
+ DEFINE_PROP_BOOL("detached", NvmeNamespace, params.detached, false),
DEFINE_PROP_UINT32("nsid", NvmeNamespace, params.nsid, 0),
DEFINE_PROP_UUID("uuid", NvmeNamespace, params.uuid),
DEFINE_PROP_UINT16("mssrl", NvmeNamespace, params.mssrl, 128),
@@ -26,6 +26,7 @@ typedef struct NvmeZone {
} NvmeZone;
typedef struct NvmeNamespaceParams {
+ bool detached;
uint32_t nsid;
QemuUUID uuid;
@@ -23,6 +23,7 @@ typedef struct NvmeSubsystem {
uint8_t subnqn[256];
NvmeCtrl *ctrls[NVME_SUBSYS_MAX_CTRLS];
+ /* Allocated namespaces for this subsystem */
NvmeNamespace *namespaces[NVME_SUBSYS_MAX_NAMESPACES];
} NvmeSubsystem;
@@ -23,7 +23,7 @@
* max_ioqpairs=<N[optional]>, \
* aerl=<N[optional]>, aer_max_queued=<N[optional]>, \
* mdts=<N[optional]>,zoned.append_size_limit=<N[optional]>, \
- * subsys=<subsys_id> \
+ * subsys=<subsys_id>,detached=<true|false[optional]>
* -device nvme-ns,drive=<drive_id>,bus=<bus_name>,nsid=<nsid>,\
* zoned=<true|false[optional]>, \
* subsys=<subsys_id>
@@ -82,6 +82,13 @@
* controllers in the subsystem. Otherwise, `bus` must be given to attach
* this namespace to a specified single controller as a non-shared namespace.
*
+ * - `detached`
+ * Not to attach the namespace device to controllers in the NVMe subsystem
+ * during boot-up. If not given, namespaces are all attahced to all
+ * controllers in the subsystem by default.
+ * It's mutual exclusive with 'bus' parameter. It's only valid in case
+ * `subsys` is provided.
+ *
* Setting `zoned` to true selects Zoned Command Set at the namespace.
* In this case, the following namespace properties are available to configure
* zoned operation:
@@ -4613,6 +4620,20 @@ static void nvme_init_state(NvmeCtrl *n)
n->aer_reqs = g_new0(NvmeRequest *, n->params.aerl + 1);
}
+static int nvme_attach_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
+{
+ if (nvme_ns_is_attached(n, ns)) {
+ error_setg(errp,
+ "namespace %d is already attached to controller %d",
+ nvme_nsid(ns), n->cntlid);
+ return -1;
+ }
+
+ nvme_ns_attach(n, ns);
+
+ return 0;
+}
+
int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
{
uint32_t nsid = nvme_nsid(ns);
@@ -4644,7 +4665,23 @@ int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
trace_pci_nvme_register_namespace(nsid);
- n->namespaces[nsid - 1] = ns;
+ /*
+ * If subsys is not given, namespae is always attached to the controller
+ * because there's no subsystem to manage namespace allocation.
+ */
+ if (!n->subsys) {
+ if (ns->params.detached) {
+ error_setg(errp,
+ "detached needs nvme-subsys specified nvme or nvme-ns");
+ return -1;
+ }
+
+ return nvme_attach_namespace(n, ns, errp);
+ } else {
+ if (!ns->params.detached) {
+ return nvme_attach_namespace(n, ns, errp);
+ }
+ }
return 0;
}
@@ -174,6 +174,10 @@ typedef struct NvmeCtrl {
NvmeSubsystem *subsys;
NvmeNamespace namespace;
+ /*
+ * Attached namespaces to this controller. If subsys is not given, all
+ * namespaces in this list will always be attached.
+ */
NvmeNamespace *namespaces[NVME_MAX_NAMESPACES];
NvmeSQueue **sq;
NvmeCQueue **cq;
@@ -192,6 +196,24 @@ static inline NvmeNamespace *nvme_ns(NvmeCtrl *n, uint32_t nsid)
return n->namespaces[nsid - 1];
}
+static inline bool nvme_ns_is_attached(NvmeCtrl *n, NvmeNamespace *ns)
+{
+ int nsid;
+
+ for (nsid = 1; nsid <= n->num_namespaces; nsid++) {
+ if (nvme_ns(n, nsid) == ns) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static inline void nvme_ns_attach(NvmeCtrl *n, NvmeNamespace *ns)
+{
+ n->namespaces[nvme_nsid(ns) - 1] = ns;
+}
+
static inline NvmeCQueue *nvme_cq(NvmeRequest *req)
{
NvmeSQueue *sq = req->sq;
Given that now we have nvme-subsys device supported, we can manage namespace allocated, but not attached: detached. This patch introduced a parameter for nvme-ns device named 'detached'. This parameter indicates whether the given namespace device is detached from a entire NVMe subsystem('subsys' given case, shared namespace) or a controller('bus' given case, private namespace). - Allocated namespace 1) Shared ns in the subsystem 'subsys0': -device nvme-ns,id=ns1,drive=blknvme0,nsid=1,subsys=subsys0,detached=true 2) Private ns for the controller 'nvme0' of the subsystem 'subsys0': -device nvme-subsys,id=subsys0 -device nvme,serial=foo,id=nvme0,subsys=subsys0 -device nvme-ns,id=ns1,drive=blknvme0,nsid=1,bus=nvme0,detached=true 3) (Invalid case) Controller 'nvme0' has no subsystem to manage ns: -device nvme,serial=foo,id=nvme0 -device nvme-ns,id=ns1,drive=blknvme0,nsid=1,bus=nvme0,detached=true Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Tested-by: Klaus Jensen <k.jensen@samsung.com> Reviewed-by: Klaus Jensen <k.jensen@samsung.com> --- hw/block/nvme-ns.c | 1 + hw/block/nvme-ns.h | 1 + hw/block/nvme-subsys.h | 1 + hw/block/nvme.c | 41 +++++++++++++++++++++++++++++++++++++++-- hw/block/nvme.h | 22 ++++++++++++++++++++++ 5 files changed, 64 insertions(+), 2 deletions(-)