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bktr: handle compression in patches (part 2).

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Turns out, if we have a compression layer in patches, we can just ignore the one from the base NCA.

bktrIsBlockWithinIndirectStorageRange() still needs to be updated.
This commit is contained in:
Pablo Curiel 2022-07-09 18:10:55 +02:00
parent 59d0e0ba90
commit df252d0d6e
1 changed files with 16 additions and 3 deletions
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19
source/core/nca_storage.c
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@ -68,7 +68,7 @@ bool ncaStorageInitializeContext(NcaStorageContext *out, NcaFsSectionContext *nc
if (!bktrSetRegularSubStorage(out->aes_ctr_ex_storage, nca_fs_ctx)) goto end;
/* Set Indirect layer's AesCtrEx substorage. */
/* Original substorage (index 0) must be manually set at a later time. */
/* Original substorage (index 0) must be manually set at a later time using ncaStorageSetPatchOriginalSubStorage(). */
if (!bktrSetBucketTreeSubStorage(out->indirect_storage, out->aes_ctr_ex_storage, 1)) goto end;
/* Update base storage type. */
@ -98,7 +98,9 @@ bool ncaStorageSetPatchOriginalSubStorage(NcaStorageContext *patch_ctx, NcaStora
!(patch_nca_ctx = (NcaContext*)patch_ctx->nca_fs_ctx->nca_ctx) || !(base_nca_ctx = (NcaContext*)base_ctx->nca_fs_ctx->nca_ctx) || \
patch_ctx->nca_fs_ctx->section_type != NcaFsSectionType_PatchRomFs || base_ctx->nca_fs_ctx->section_type != NcaFsSectionType_RomFs || \
patch_nca_ctx->header.program_id != base_nca_ctx->header.program_id || patch_nca_ctx->header.content_type != base_nca_ctx->header.content_type || \
patch_nca_ctx->id_offset != base_nca_ctx->id_offset || patch_nca_ctx->title_version < base_nca_ctx->title_version || !patch_ctx->indirect_storage)
patch_nca_ctx->id_offset != base_nca_ctx->id_offset || patch_nca_ctx->title_version < base_nca_ctx->title_version || \
(patch_ctx->base_storage_type != NcaStorageBaseStorageType_Indirect && patch_ctx->base_storage_type != NcaStorageBaseStorageType_Compressed) || \
!patch_ctx->indirect_storage || !patch_ctx->aes_ctr_ex_storage)
{
LOG_MSG("Invalid parameters!");
return false;
@ -116,7 +118,18 @@ bool ncaStorageSetPatchOriginalSubStorage(NcaStorageContext *patch_ctx, NcaStora
success = bktrSetBucketTreeSubStorage(patch_ctx->indirect_storage, base_ctx->sparse_storage, 0);
break;
case NcaStorageBaseStorageType_Compressed:
success = bktrSetBucketTreeSubStorage(patch_ctx->indirect_storage, base_ctx->compressed_storage, 0);
if (patch_ctx->base_storage_type == NcaStorageBaseStorageType_Compressed)
{
/* If Compressed Storages are available in both base and patch NCAs, the Patch's Indirect storage already provides section-relative physical offsets. */
/* We don't need to parse the base NCA's Compressed Storage on every read. */
success = bktrSetRegularSubStorage(patch_ctx->indirect_storage, base_ctx->nca_fs_ctx);
} else {
/* No Compressed Storage available in the patch NCA. */
/* We'll need to parse the base NCA's Compressed Storage on every read. */
/* TODO: check if this combination is even possible. */
success = bktrSetBucketTreeSubStorage(patch_ctx->indirect_storage, base_ctx->compressed_storage, 0);
}
break;
default:
break;