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path: root/lib/sqfs/blk_proc/process_block.c
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Diffstat (limited to 'lib/sqfs/blk_proc/process_block.c')
-rw-r--r--lib/sqfs/blk_proc/process_block.c151
1 files changed, 150 insertions, 1 deletions
diff --git a/lib/sqfs/blk_proc/process_block.c b/lib/sqfs/blk_proc/process_block.c
index 1b6ee29..0747bc5 100644
--- a/lib/sqfs/blk_proc/process_block.c
+++ b/lib/sqfs/blk_proc/process_block.c
@@ -37,6 +37,155 @@ int sqfs_block_process(sqfs_block_t *block, sqfs_compressor_t *cmp,
return 0;
}
+static int allign_file(sqfs_block_processor_t *proc, sqfs_block_t *blk)
+{
+ if (!(blk->flags & SQFS_BLK_ALLIGN))
+ return 0;
+
+ return padd_sqfs(proc->file, proc->file->get_size(proc->file),
+ proc->devblksz);
+}
+
+static int store_block_location(sqfs_block_processor_t *proc, uint64_t offset,
+ uint32_t size, uint32_t chksum)
+{
+ size_t new_sz;
+ void *new;
+
+ if (proc->num_blocks == proc->max_blocks) {
+ new_sz = proc->max_blocks * 2;
+ new = realloc(proc->blocks, sizeof(proc->blocks[0]) * new_sz);
+
+ if (new == NULL)
+ return SQFS_ERROR_ALLOC;
+
+ proc->blocks = new;
+ proc->max_blocks = new_sz;
+ }
+
+ proc->blocks[proc->num_blocks].offset = offset;
+ proc->blocks[proc->num_blocks].signature = MK_BLK_SIG(chksum, size);
+ proc->num_blocks += 1;
+ return 0;
+}
+
+static size_t deduplicate_blocks(sqfs_block_processor_t *proc, size_t count)
+{
+ size_t i, j;
+
+ for (i = 0; i < proc->file_start; ++i) {
+ for (j = 0; j < count; ++j) {
+ if (proc->blocks[i + j].signature !=
+ proc->blocks[proc->file_start + j].signature)
+ break;
+ }
+
+ if (j == count)
+ break;
+ }
+
+ return i;
+}
+
+static size_t grow_fragment_table(sqfs_block_processor_t *proc, size_t index)
+{
+ size_t newsz;
+ void *new;
+
+ if (index < proc->max_fragments)
+ return 0;
+
+ do {
+ newsz = proc->max_fragments ? proc->max_fragments * 2 : 16;
+ } while (index >= newsz);
+
+ new = realloc(proc->fragments, sizeof(proc->fragments[0]) * newsz);
+
+ if (new == NULL)
+ return SQFS_ERROR_ALLOC;
+
+ proc->max_fragments = newsz;
+ proc->fragments = new;
+ return 0;
+}
+
+static int handle_block(sqfs_block_processor_t *proc, sqfs_block_t *blk)
+{
+ size_t start, count;
+ uint64_t offset;
+ uint32_t out;
+ int err;
+
+ if (blk->flags & SQFS_BLK_FIRST_BLOCK) {
+ proc->start = proc->file->get_size(proc->file);
+ proc->file_start = proc->num_blocks;
+
+ err = allign_file(proc, blk);
+ if (err)
+ return err;
+ }
+
+ if (blk->size != 0) {
+ out = blk->size;
+ if (!(blk->flags & SQFS_BLK_IS_COMPRESSED))
+ out |= 1 << 24;
+
+ offset = proc->file->get_size(proc->file);
+
+ if (blk->flags & SQFS_BLK_FRAGMENT_BLOCK) {
+ if (grow_fragment_table(proc, blk->index))
+ return 0;
+
+ offset = htole64(offset);
+ proc->fragments[blk->index].start_offset = offset;
+ proc->fragments[blk->index].pad0 = 0;
+ proc->fragments[blk->index].size = htole32(out);
+
+ if (blk->index >= proc->num_fragments)
+ proc->num_fragments = blk->index + 1;
+ } else {
+ blk->inode->block_sizes[blk->index] = out;
+ }
+
+ err = store_block_location(proc, offset, out, blk->checksum);
+ if (err)
+ return err;
+
+ err = proc->file->write_at(proc->file, offset,
+ blk->data, blk->size);
+ if (err)
+ return err;
+ }
+
+ if (blk->flags & SQFS_BLK_LAST_BLOCK) {
+ err = allign_file(proc, blk);
+ if (err)
+ return err;
+
+ count = proc->num_blocks - proc->file_start;
+ start = deduplicate_blocks(proc, count);
+ offset = proc->blocks[start].offset;
+
+ sqfs_inode_set_file_block_start(blk->inode, offset);
+
+ if (start < proc->file_start) {
+ offset = start + count;
+
+ if (offset >= proc->file_start) {
+ proc->num_blocks = offset;
+ } else {
+ proc->num_blocks = proc->file_start;
+ }
+
+ err = proc->file->truncate(proc->file, proc->start);
+ if (err)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
int process_completed_blocks(sqfs_block_processor_t *proc, sqfs_block_t *queue)
{
sqfs_block_t *it;
@@ -48,7 +197,7 @@ int process_completed_blocks(sqfs_block_processor_t *proc, sqfs_block_t *queue)
if (it->flags & SQFS_BLK_COMPRESS_ERROR) {
proc->status = SQFS_ERROR_COMRPESSOR;
} else if (proc->status == 0) {
- proc->status = proc->cb(proc->user, it);
+ proc->status = handle_block(proc, it);
}
free(it);