ec20329748
nvme_subsys_ns() is used in contexts where the namespace identifier is taken from an untrusted source. Commit3921756dee("hw/block/nvme: assert namespaces array indices") tried to guard against this by introducing an assert on the namespace identifier. This is wrong since it is perfectly valid to call the function with an invalid namespace identifier and like nvme_ns(), nvme_subsys_ns() should simply return NULL. Fixes:3921756dee("hw/block/nvme: assert namespaces array indices") Fixes:94d8d6d167("hw/block/nvme: support allocated namespace type") Cc: Minwoo Im <minwoo.im.dev@gmail.com> Signed-off-by: Klaus Jensen <k.jensen@samsung.com> Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
60 lines
1.3 KiB
C
60 lines
1.3 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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#ifndef NVME_SUBSYS_H
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#define NVME_SUBSYS_H
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#define TYPE_NVME_SUBSYS "nvme-subsys"
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#define NVME_SUBSYS(obj) \
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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_MAX_NAMESPACES 256
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typedef struct NvmeCtrl NvmeCtrl;
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typedef struct NvmeNamespace NvmeNamespace;
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typedef struct NvmeSubsystem {
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DeviceState parent_obj;
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uint8_t subnqn[256];
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NvmeCtrl *ctrls[NVME_SUBSYS_MAX_CTRLS];
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/* Allocated namespaces for this subsystem */
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NvmeNamespace *namespaces[NVME_MAX_NAMESPACES + 1];
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struct {
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char *nqn;
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} params;
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} NvmeSubsystem;
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int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp);
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static inline NvmeCtrl *nvme_subsys_ctrl(NvmeSubsystem *subsys,
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uint32_t cntlid)
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{
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if (!subsys) {
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return NULL;
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}
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return subsys->ctrls[cntlid];
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}
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/*
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* Return allocated namespace of the specified nsid in the subsystem.
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*/
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static inline NvmeNamespace *nvme_subsys_ns(NvmeSubsystem *subsys,
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uint32_t nsid)
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{
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if (!subsys || !nsid || nsid > NVME_MAX_NAMESPACES) {
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return NULL;
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}
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return subsys->namespaces[nsid];
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}
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#endif /* NVME_SUBSYS_H */
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