On 4/5/21 7:54 PM, Klaus Jensen wrote: > From: Klaus Jensen <k.jen...@samsung.com> > > The controller namespaces array being 0-indexed requires 'nsid - 1' > everywhere. Something that is easy to miss. Align the controller > namespaces array with the subsystem namespaces array such that both are > 1-indexed.
TBH I don't understand the justification. Assuming you hit a bug and try to protect yourself, maybe now you should also check for assert(n->namespaces[0] == NULL); somewhere. In nvme_ns() maybe? > > Signed-off-by: Klaus Jensen <k.jen...@samsung.com> > Reviewed-by: Gollu Appalanaidu <anaidu.go...@samsung.com> > --- > hw/block/nvme.h | 8 ++++---- > hw/block/nvme.c | 2 +- > 2 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/hw/block/nvme.h b/hw/block/nvme.h > index 9edc86d79e98..c610ab30dc5c 100644 > --- a/hw/block/nvme.h > +++ b/hw/block/nvme.h > @@ -217,7 +217,7 @@ typedef struct NvmeCtrl { > * Attached namespaces to this controller. If subsys is not given, all > * namespaces in this list will always be attached. > */ > - NvmeNamespace *namespaces[NVME_MAX_NAMESPACES]; > + NvmeNamespace *namespaces[NVME_MAX_NAMESPACES + 1]; > NvmeSQueue **sq; > NvmeCQueue **cq; > NvmeSQueue admin_sq; > @@ -232,7 +232,7 @@ static inline NvmeNamespace *nvme_ns(NvmeCtrl *n, > uint32_t nsid) > return NULL; > } > > - return n->namespaces[nsid - 1]; > + return n->namespaces[nsid]; > } > > static inline bool nvme_ns_is_attached(NvmeCtrl *n, NvmeNamespace *ns) > @@ -253,7 +253,7 @@ static inline void nvme_ns_attach(NvmeCtrl *n, > NvmeNamespace *ns) > uint32_t nsid = nvme_nsid(ns); > assert(nsid && nsid <= NVME_MAX_NAMESPACES); > > - n->namespaces[nsid - 1] = ns; > + n->namespaces[nsid] = ns; > } > > static inline void nvme_ns_detach(NvmeCtrl *n, NvmeNamespace *ns) > @@ -261,7 +261,7 @@ static inline void nvme_ns_detach(NvmeCtrl *n, > NvmeNamespace *ns) > uint32_t nsid = nvme_nsid(ns); > assert(nsid && nsid <= NVME_MAX_NAMESPACES); > > - n->namespaces[nsid - 1] = NULL; > + n->namespaces[nsid] = NULL; > } > > static inline NvmeCQueue *nvme_cq(NvmeRequest *req) > diff --git a/hw/block/nvme.c b/hw/block/nvme.c > index c54ec3c9523c..6d31d5b17a0b 100644 > --- a/hw/block/nvme.c > +++ b/hw/block/nvme.c > @@ -5915,7 +5915,7 @@ int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace > *ns, Error **errp) > return -1; > } > } else { > - if (n->namespaces[nsid - 1]) { > + if (n->namespaces[nsid]) { > error_setg(errp, "namespace id '%d' is already in use", nsid); > return -1; > } >