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Code Issues Releases Activity

BKTR rewrite part 2: partially implement BucketTreeVisitor.

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This commit is contained in:
Pablo Curiel 2022-07-02 16:07:08 +02:00
parent 29e5af2064
commit 7c38b6847d
2 changed files with 36 additions and 20 deletions
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3
include/core/bktr.h
View file

@ -156,6 +156,9 @@ typedef struct {
u32 entry_set_count; ///< Number of BucketTreeEntryNode elements available in this storage.
u64 start_offset; ///< Virtual storage start offset.
u64 end_offset; ///< Virtual storage end offset.
// TODO: add sub storage
} BucketTreeContext;
/// Initializes a Bucket Tree context using the provided NCA FS section context and a storage

53
source/core/bktr.c
View file

@ -37,6 +37,13 @@ typedef struct {
u32 index;
} BucketTreeStorageNode;
typedef struct {
BucketTreeContext *bktr_ctx;
BucketTreeNodeHeader entry_set;
u32 entry_index;
void *entry;
} BucketTreeVisitor;
/* Global variables. */
static const char *g_bktrStorageTypeNames[] = {
@ -71,7 +78,7 @@ NX_INLINE const u64 *bktrGetOffsetNodeArray(const BucketTreeOffsetNode *offset_n
NX_INLINE const u64 *bktrGetOffsetNodeBegin(const BucketTreeOffsetNode *offset_node);
NX_INLINE const u64 *bktrGetOffsetNodeEnd(const BucketTreeOffsetNode *offset_node);
static bool bktrFindStorageEntry(BucketTreeContext *ctx, u64 virtual_offset, void **out_entry);
static bool bktrFindStorageEntry(BucketTreeContext *ctx, u64 virtual_offset, BucketTreeVisitor *out_visitor);
static bool bktrGetTreeNodeEntryIndex(const u64 *start, const u64 *end, u64 virtual_offset, u32 *out_index);
static bool bktrGetEntryNodeEntryIndex(const BucketTreeNodeHeader *node_header, u64 node_offset, u64 entry_size, u64 virtual_offset, u32 *out_index);
@ -79,7 +86,7 @@ static bool bktrFindEntrySet(u32 *out_index, u64 virtual_offset, u32 node_index)
static const BucketTreeNodeHeader *bktrGetTreeNodeHeader(BucketTreeContext *ctx, u32 node_index);
NX_INLINE u32 bktrGetEntrySetIndex(BucketTreeContext *ctx, u32 node_index, u32 offset_index);
static bool bktrFindEntry(BucketTreeContext *ctx, void **out_entry, u64 virtual_offset, u32 entry_set_index);
static bool bktrFindEntry(BucketTreeContext *ctx, BucketTreeVisitor *out_visitor, u64 virtual_offset, u32 entry_set_index);
static const BucketTreeNodeHeader *bktrGetEntryNodeHeader(BucketTreeContext *ctx, u32 entry_set_index);
NX_INLINE u64 bktrGetEntryNodeEntryOffset(u64 entry_set_offset, u64 entry_size, u32 entry_index);
@ -138,11 +145,11 @@ bool bktrReadStorage(BucketTreeContext *ctx, void *out, u64 read_size, u64 offse
return false;
}
void *storage_entry = NULL;
BucketTreeVisitor visitor = {0};
bool success = false;
/* Find storage entry. */
if (!bktrFindStorageEntry(ctx, offset, &storage_entry))
if (!bktrFindStorageEntry(ctx, offset, &visitor))
{
LOG_MSG("Unable to find %s storage entry for offset 0x%lX!", bktrGetStorageTypeName(ctx->storage_type), offset);
goto end;
@ -153,13 +160,13 @@ bool bktrReadStorage(BucketTreeContext *ctx, void *out, u64 read_size, u64 offse
{
case BucketTreeStorageType_Indirect:
case BucketTreeStorageType_Sparse:
success = bktrReadIndirectStorage(ctx, storage_entry, read_size, offset);
success = bktrReadIndirectStorage(&visitor, read_size, offset);
break;
case BucketTreeStorageType_AesCtrEx:
//success = bktrInitializeAesCtrExStorageContext(out, nca_fs_ctx);
success = bktrReadAesCtrExStorage(&visitor, read_size, offset);
break;
case BucketTreeStorageType_Compressed:
//success = bktrInitializeCompressedStorageContext(out, nca_fs_ctx);
success = bktrReadCompressedStorage(&visitor, read_size, offset);
break;
default:
break;
@ -175,20 +182,21 @@ end:
static bool bktrReadIndirectStorage(BucketTreeContext *ctx, void *storage_entry, u64 read_size, u64 offset)
static bool bktrReadIndirectStorage(BucketTreeVisitor *visitor, u64 read_size, u64 offset)
{
BucketTreeContext *ctx = visitor->bktr_ctx;
NcaFsSectionContext *nca_fs_ctx = ctx->nca_fs_ctx;
bool is_sparse = (ctx->storage_type == BucketTreeStorageType_Sparse);
BucketTreeIndirectStorageEntry *entry = (BucketTreeIndirectStorageEntry*)storage_entry;
BucketTreeIndirectStorageEntry *entry = (BucketTreeIndirectStorageEntry*)visitor->entry;
/* Validate Indirect Storage entry. */
if (!bktrIsOffsetWithinStorageRange(entry->virtual_offset) || (nca_fs_ctx->section_offset + entry->physical_offset) >= nca_fs_ctx->section_size)
{
LOG_MSG("Invalid Indirect Storage entry offsets! (0x%lX, 0x%lX).", entry->virtual_offset, entry->physical_offset);
LOG_MSG("Invalid Indirect Storage entry! (0x%lX, 0x%lX).", entry->virtual_offset, entry->physical_offset);
return false;
}
/* Prepare to operate in chunks. */
@ -592,9 +600,9 @@ NX_INLINE const u64 *bktrGetOffsetNodeEnd(const BucketTreeOffsetNode *offset_nod
return (bktrGetOffsetNodeArray(offset_node) + offset_node->header.count);
}
static bool bktrFindStorageEntry(BucketTreeContext *ctx, u64 virtual_offset, void **out_entry)
static bool bktrFindStorageEntry(BucketTreeContext *ctx, u64 virtual_offset, BucketTreeVisitor *out_visitor)
{
if (!ctx || !out_entry || virtual_offset >= ctx->storage_table->offset_node.header.offset)
if (!ctx || virtual_offset >= ctx->storage_table->offset_node.header.offset || !out_visitor)
{
LOG_MSG("Invalid parameters!");
return false;
@ -647,8 +655,8 @@ static bool bktrFindStorageEntry(BucketTreeContext *ctx, u64 virtual_offset, voi
}
/* Find the entry. */
success = bktrFindEntry(ctx, out_entry, virtual_offset, entry_set_index);
if (!success) LOG_MSG("Failed to retrieve storage entry pointer!");
success = bktrFindEntry(ctx, out_visitor, virtual_offset, entry_set_index);
if (!success) LOG_MSG("Failed to retrieve storage entry!");
end:
return success;
@ -747,7 +755,7 @@ static const BucketTreeNodeHeader *bktrGetTreeNodeHeader(BucketTreeContext *ctx,
}
/* Get offset node header. */
const BucketTreeNodeHeader *node_header = (const BucketTreeNodeHeader*)((u8*)ctx->table + node_offset);
const BucketTreeNodeHeader *node_header = (const BucketTreeNodeHeader*)((u8*)ctx->storage_table + node_offset);
/* Validate offset node header. */
if (!bktrVerifyNodeHeader(node_header, node_index, node_size, sizeof(u64)))
@ -764,7 +772,7 @@ NX_INLINE u32 bktrGetEntrySetIndex(BucketTreeContext *ctx, u32 node_index, u32 o
return (u32)((ctx->offset_count - ctx->storage_table->offset_node.header.count) + (ctx->offset_count * node_index) + offset_index);
}
static bool bktrFindEntry(BucketTreeContext *ctx, void **out_entry, u64 virtual_offset, u32 entry_set_index)
static bool bktrFindEntry(BucketTreeContext *ctx, BucketTreeVisitor *out_visitor, u64 virtual_offset, u32 entry_set_index)
{
/* Get entry node header. */
const BucketTreeNodeHeader *entry_set_header = bktrGetEntryNodeHeader(ctx, entry_set_index);
@ -795,8 +803,13 @@ static bool bktrFindEntry(BucketTreeContext *ctx, void **out_entry, u64 virtual_
return false;
}
/* Update entry pointer. */
*out_entry = ((u8*)ctx->table + entry_offset);
/* Update output visitor. */
memset(out, 0, sizeof(BucketTreeVisitor));
out_visitor->bktr_ctx = ctx;
memcpy(&(out_visitor->entry_set), entry_set_header, BKTR_NODE_HEADER_SIZE);
out_visitor->entry_index = entry_index
out_visitor->entry = ((u8*)ctx->storage_table + entry_offset);
return true;
}
@ -815,7 +828,7 @@ static const BucketTreeNodeHeader *bktrGetEntryNodeHeader(BucketTreeContext *ctx
}
/* Get entry node header. */
const BucketTreeNodeHeader *entry_set_header = (const BucketTreeNodeHeader*)((u8*)ctx->table + entry_set_offset);
const BucketTreeNodeHeader *entry_set_header = (const BucketTreeNodeHeader*)((u8*)ctx->storage_table + entry_set_offset);
/* Validate entry node header. */
if (!bktrVerifyNodeHeader(entry_set_header, entry_set_index, entry_set_size, entry_size))