a859eb9f8f
The Identify Controller Serial Number (SN) is the serial number for the NVM subsystem and must be the same across all controller in the NVM subsystem. Enforce this. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
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* QEMU NVM Express Subsystem: nvme-subsys
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*
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* Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com>
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*
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* This code is licensed under the GNU GPL v2. Refer COPYING.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "nvme.h"
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int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
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{
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NvmeSubsystem *subsys = n->subsys;
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int cntlid, nsid;
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for (cntlid = 0; cntlid < ARRAY_SIZE(subsys->ctrls); cntlid++) {
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if (!subsys->ctrls[cntlid]) {
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break;
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}
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}
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if (cntlid == ARRAY_SIZE(subsys->ctrls)) {
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error_setg(errp, "no more free controller id");
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return -1;
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}
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if (!subsys->serial) {
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subsys->serial = g_strdup(n->params.serial);
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} else if (strcmp(subsys->serial, n->params.serial)) {
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error_setg(errp, "invalid controller serial");
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return -1;
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}
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subsys->ctrls[cntlid] = n;
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for (nsid = 1; nsid < ARRAY_SIZE(subsys->namespaces); nsid++) {
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NvmeNamespace *ns = subsys->namespaces[nsid];
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if (ns && ns->params.shared && !ns->params.detached) {
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nvme_attach_ns(n, ns);
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}
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}
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return cntlid;
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}
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void nvme_subsys_unregister_ctrl(NvmeSubsystem *subsys, NvmeCtrl *n)
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{
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subsys->ctrls[n->cntlid] = NULL;
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n->cntlid = -1;
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}
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static void nvme_subsys_setup(NvmeSubsystem *subsys)
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{
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const char *nqn = subsys->params.nqn ?
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subsys->params.nqn : subsys->parent_obj.id;
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snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn),
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"nqn.2019-08.org.qemu:%s", nqn);
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}
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static void nvme_subsys_realize(DeviceState *dev, Error **errp)
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{
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NvmeSubsystem *subsys = NVME_SUBSYS(dev);
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qbus_init(&subsys->bus, sizeof(NvmeBus), TYPE_NVME_BUS, dev, dev->id);
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nvme_subsys_setup(subsys);
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}
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static Property nvme_subsystem_props[] = {
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DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void nvme_subsys_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
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dc->realize = nvme_subsys_realize;
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dc->desc = "Virtual NVMe subsystem";
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dc->hotpluggable = false;
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device_class_set_props(dc, nvme_subsystem_props);
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}
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static const TypeInfo nvme_subsys_info = {
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.name = TYPE_NVME_SUBSYS,
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.parent = TYPE_DEVICE,
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.class_init = nvme_subsys_class_init,
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.instance_size = sizeof(NvmeSubsystem),
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};
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static void nvme_subsys_register_types(void)
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{
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type_register_static(&nvme_subsys_info);
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}
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type_init(nvme_subsys_register_types)
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