hw/block/nvme: support for shared namespace in subsystem
nvme-ns device is registered to a nvme controller device during the initialization in nvme_register_namespace() in case that 'bus' property is given which means it's mapped to a single controller. This patch introduced a new property 'subsys' just like the controller device instance did to map a namespace to a NVMe subsystem. If 'subsys' property is given to the nvme-ns device, it will belong to the specified subsystem and will be attached to all controllers in that subsystem by enabling shared namespace capability in NMIC(Namespace Multi-path I/O and Namespace Capabilities) in Identify Namespace. Usage: -device nvme-subsys,id=subsys0 -device nvme,serial=foo,id=nvme0,subsys=subsys0 -device nvme,serial=bar,id=nvme1,subsys=subsys0 -device nvme,serial=baz,id=nvme2,subsys=subsys0 -device nvme-ns,id=ns1,drive=<drv>,nsid=1,subsys=subsys0 # Shared -device nvme-ns,id=ns2,drive=<drv>,nsid=2,bus=nvme2 # Non-shared In the above example, 'ns1' will be shared to 'nvme0' and 'nvme1' in the same subsystem. On the other hand, 'ns2' will be attached to the 'nvme2' only as a private namespace in that subsystem. All the namespace with 'subsys' parameter will attach all controllers in the subsystem to the namespace by default. 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> Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
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@ -63,6 +63,10 @@ static int nvme_ns_init(NvmeNamespace *ns, Error **errp)
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id_ns->npda = id_ns->npdg = npdg - 1;
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id_ns->npda = id_ns->npdg = npdg - 1;
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if (nvme_ns_shared(ns)) {
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id_ns->nmic |= NVME_NMIC_NS_SHARED;
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}
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return 0;
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return 0;
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}
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}
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@ -363,14 +367,21 @@ static void nvme_ns_realize(DeviceState *dev, Error **errp)
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return;
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return;
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}
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}
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if (nvme_register_namespace(n, ns, errp)) {
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if (ns->subsys) {
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return;
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if (nvme_subsys_register_ns(ns, errp)) {
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return;
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}
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} else {
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if (nvme_register_namespace(n, ns, errp)) {
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return;
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}
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}
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}
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}
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}
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static Property nvme_ns_props[] = {
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static Property nvme_ns_props[] = {
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DEFINE_BLOCK_PROPERTIES(NvmeNamespace, blkconf),
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DEFINE_BLOCK_PROPERTIES(NvmeNamespace, blkconf),
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DEFINE_PROP_LINK("subsys", NvmeNamespace, subsys, TYPE_NVME_SUBSYS,
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NvmeSubsystem *),
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DEFINE_PROP_UINT32("nsid", NvmeNamespace, params.nsid, 0),
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DEFINE_PROP_UINT32("nsid", NvmeNamespace, params.nsid, 0),
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DEFINE_PROP_UUID("uuid", NvmeNamespace, params.uuid),
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DEFINE_PROP_UUID("uuid", NvmeNamespace, params.uuid),
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DEFINE_PROP_BOOL("zoned", NvmeNamespace, params.zoned, false),
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DEFINE_PROP_BOOL("zoned", NvmeNamespace, params.zoned, false),
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@ -47,6 +47,8 @@ typedef struct NvmeNamespace {
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const uint32_t *iocs;
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const uint32_t *iocs;
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uint8_t csi;
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uint8_t csi;
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NvmeSubsystem *subsys;
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NvmeIdNsZoned *id_ns_zoned;
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NvmeIdNsZoned *id_ns_zoned;
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NvmeZone *zone_array;
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NvmeZone *zone_array;
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QTAILQ_HEAD(, NvmeZone) exp_open_zones;
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QTAILQ_HEAD(, NvmeZone) exp_open_zones;
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@ -77,6 +79,11 @@ static inline uint32_t nvme_nsid(NvmeNamespace *ns)
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return -1;
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return -1;
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}
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}
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static inline bool nvme_ns_shared(NvmeNamespace *ns)
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{
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return !!ns->subsys;
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}
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static inline NvmeLBAF *nvme_ns_lbaf(NvmeNamespace *ns)
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static inline NvmeLBAF *nvme_ns_lbaf(NvmeNamespace *ns)
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{
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{
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NvmeIdNs *id_ns = &ns->id_ns;
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NvmeIdNs *id_ns = &ns->id_ns;
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@ -43,6 +43,31 @@ int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
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return cntlid;
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return cntlid;
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}
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}
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int nvme_subsys_register_ns(NvmeNamespace *ns, Error **errp)
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{
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NvmeSubsystem *subsys = ns->subsys;
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NvmeCtrl *n;
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int i;
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if (subsys->namespaces[nvme_nsid(ns)]) {
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error_setg(errp, "namespace %d already registerd to subsy %s",
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nvme_nsid(ns), subsys->parent_obj.id);
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return -1;
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}
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subsys->namespaces[nvme_nsid(ns)] = ns;
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for (i = 0; i < ARRAY_SIZE(subsys->ctrls); i++) {
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n = subsys->ctrls[i];
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if (n && nvme_register_namespace(n, ns, errp)) {
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return -1;
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}
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}
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return 0;
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}
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static void nvme_subsys_setup(NvmeSubsystem *subsys)
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static void nvme_subsys_setup(NvmeSubsystem *subsys)
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{
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{
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const char *nqn = subsys->params.nqn ?
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const char *nqn = subsys->params.nqn ?
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@ -14,6 +14,7 @@
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OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
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OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
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#define NVME_SUBSYS_MAX_CTRLS 32
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#define NVME_SUBSYS_MAX_CTRLS 32
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#define NVME_SUBSYS_MAX_NAMESPACES 32
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typedef struct NvmeCtrl NvmeCtrl;
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typedef struct NvmeCtrl NvmeCtrl;
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typedef struct NvmeNamespace NvmeNamespace;
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typedef struct NvmeNamespace NvmeNamespace;
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@ -22,6 +23,7 @@ typedef struct NvmeSubsystem {
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uint8_t subnqn[256];
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uint8_t subnqn[256];
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NvmeCtrl *ctrls[NVME_SUBSYS_MAX_CTRLS];
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NvmeCtrl *ctrls[NVME_SUBSYS_MAX_CTRLS];
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NvmeNamespace *namespaces[NVME_SUBSYS_MAX_NAMESPACES];
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struct {
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struct {
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char *nqn;
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char *nqn;
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@ -29,5 +31,6 @@ typedef struct NvmeSubsystem {
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} NvmeSubsystem;
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} NvmeSubsystem;
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int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp);
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int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp);
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int nvme_subsys_register_ns(NvmeNamespace *ns, Error **errp);
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#endif /* NVME_SUBSYS_H */
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#endif /* NVME_SUBSYS_H */
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@ -26,7 +26,8 @@
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* mdts=<N[optional]>,zoned.append_size_limit=<N[optional]>, \
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* mdts=<N[optional]>,zoned.append_size_limit=<N[optional]>, \
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* subsys=<subsys_id>
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* subsys=<subsys_id>
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* -device nvme-ns,drive=<drive_id>,bus=<bus_name>,nsid=<nsid>,\
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* -device nvme-ns,drive=<drive_id>,bus=<bus_name>,nsid=<nsid>,\
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* zoned=<true|false[optional]>
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* zoned=<true|false[optional]>, \
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* subsys=<subsys_id>
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*
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*
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* Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at
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* Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at
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* offset 0 in BAR2 and supports only WDS, RDS and SQS for now. By default, the
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* offset 0 in BAR2 and supports only WDS, RDS and SQS for now. By default, the
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@ -79,6 +80,13 @@
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* data size being in effect. By setting this property to 0, users can make
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* data size being in effect. By setting this property to 0, users can make
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* ZASL to be equal to MDTS. This property only affects zoned namespaces.
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* ZASL to be equal to MDTS. This property only affects zoned namespaces.
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*
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*
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* nvme namespace device parameters
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* - `subsys`
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* If given, the namespace will be attached to all controllers in the
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* subsystem. Otherwise, `bus` must be given to attach this namespace to a
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* specific controller as a non-shared namespace.
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*
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* Setting `zoned` to true selects Zoned Command Set at the namespace.
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* Setting `zoned` to true selects Zoned Command Set at the namespace.
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* In this case, the following namespace properties are available to configure
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* In this case, the following namespace properties are available to configure
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* zoned operation:
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* zoned operation:
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