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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2021-01-16 00:23:20 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2021-01-19 06:01:51 +0100
commit8026849fda277f54a2a3e4fa5cf5d183cbc84bef (patch)
treef000e36ec9caab771888ad03338094a92e2e958b /lib/sqfs/block_processor/winpthread.c
parentc1a5ea0d4dceeb9354ff792fc510caa854223463 (diff)
libsqfs: Implement exact matching of fragments
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/block_processor/winpthread.c')
-rw-r--r--lib/sqfs/block_processor/winpthread.c83
1 files changed, 82 insertions, 1 deletions
diff --git a/lib/sqfs/block_processor/winpthread.c b/lib/sqfs/block_processor/winpthread.c
index c3e3d13..806c749 100644
--- a/lib/sqfs/block_processor/winpthread.c
+++ b/lib/sqfs/block_processor/winpthread.c
@@ -78,6 +78,8 @@ struct compress_worker_t {
thread_pool_processor_t *shared;
sqfs_compressor_t *cmp;
THREAD_HANDLE thread;
+ sqfs_u32 frag_blk_index;
+ sqfs_u32 frag_blk_size;
sqfs_u8 scratch[];
};
@@ -178,6 +180,14 @@ static THREAD_TYPE worker_proc(THREAD_ARG arg)
store_completed_block(shared, blk, status);
blk = get_next_work_item(shared);
+
+ if (blk != NULL && (blk->flags & SQFS_BLK_FRAGMENT_BLOCK) &&
+ shared->base.uncmp != NULL && shared->base.file != NULL) {
+ memcpy(worker->scratch + shared->base.max_block_size,
+ blk->data, blk->size);
+ worker->frag_blk_index = blk->index;
+ worker->frag_blk_size = blk->size;
+ }
UNLOCK(&shared->mtx);
if (blk == NULL)
@@ -388,6 +398,70 @@ static int append_to_work_queue(sqfs_block_processor_t *proc,
return status;
}
+static sqfs_block_t *find_frag_blk_in_queue(sqfs_block_t *q, sqfs_u32 index)
+{
+ while (q != NULL) {
+ if ((q->flags & SQFS_BLK_FRAGMENT_BLOCK) && q->index == index)
+ break;
+ q = q->next;
+ }
+ return q;
+}
+
+static int compare_frag_in_flight(sqfs_block_processor_t *proc,
+ sqfs_block_t *frag, sqfs_u32 index,
+ sqfs_u32 offset)
+{
+ thread_pool_processor_t *thproc = (thread_pool_processor_t *)proc;
+ sqfs_block_t *it = NULL;
+ void *blockbuf = NULL;
+ size_t i, size = 0;
+ int ret;
+
+ if (proc->frag_block != NULL && proc->frag_block->index == index)
+ it = proc->frag_block;
+
+ if (it == NULL)
+ it = find_frag_blk_in_queue(thproc->proc_queue, index);
+
+ if (it == NULL)
+ it = find_frag_blk_in_queue(thproc->io_queue, index);
+
+ if (it == NULL)
+ it = find_frag_blk_in_queue(thproc->done, index);
+
+ if (it == NULL) {
+ for (i = 0; i < thproc->num_workers; ++i) {
+ if (thproc->workers[i]->frag_blk_index == index) {
+ size = thproc->workers[i]->frag_blk_size;
+ blockbuf = thproc->workers[i]->scratch +
+ proc->max_block_size;
+ break;
+ }
+ }
+ } else if (it->flags & SQFS_BLK_IS_COMPRESSED) {
+ proc->buffered_index = 0xFFFFFFFF;
+ blockbuf = proc->frag_buffer;
+ ret = proc->uncmp->do_block(proc->uncmp, it->data, it->size,
+ blockbuf, proc->max_block_size);
+ if (ret <= 0)
+ return -1;
+ proc->buffered_index = it->index;
+ size = ret;
+ } else {
+ blockbuf = it->data;
+ size = it->size;
+ }
+
+ if (blockbuf == NULL || size == 0)
+ return -1;
+
+ if (offset >= size || frag->size > (size - offset))
+ return -1;
+
+ return memcmp((const char *)blockbuf + offset, frag->data, frag->size);
+}
+
static int block_processor_sync(sqfs_block_processor_t *proc)
{
return append_to_work_queue(proc, NULL);
@@ -398,6 +472,7 @@ int sqfs_block_processor_create_ex(const sqfs_block_processor_desc_t *desc,
{
thread_pool_processor_t *proc;
unsigned int i, num_workers;
+ size_t scratch_size;
sigset_t oldset;
int ret;
@@ -419,6 +494,7 @@ int sqfs_block_processor_create_ex(const sqfs_block_processor_desc_t *desc,
proc->base.sync = block_processor_sync;
proc->base.append_to_work_queue = append_to_work_queue;
+ proc->base.compare_frag_in_flight = compare_frag_in_flight;
proc->num_workers = num_workers;
proc->max_backlog = desc->max_backlog;
((sqfs_object_t *)proc)->destroy = block_processor_destroy;
@@ -430,8 +506,12 @@ int sqfs_block_processor_create_ex(const sqfs_block_processor_desc_t *desc,
SIGNAL_DISABLE(&oldset);
for (i = 0; i < num_workers; ++i) {
+ scratch_size = desc->max_block_size;
+ if (desc->uncmp != NULL && desc->file != NULL)
+ scratch_size *= 2;
+
proc->workers[i] = alloc_flex(sizeof(compress_worker_t),
- 1, desc->max_block_size);
+ 1, scratch_size);
if (proc->workers[i] == NULL) {
ret = SQFS_ERROR_ALLOC;
@@ -440,6 +520,7 @@ int sqfs_block_processor_create_ex(const sqfs_block_processor_desc_t *desc,
proc->workers[i]->shared = proc;
proc->workers[i]->cmp = sqfs_copy(desc->cmp);
+ proc->workers[i]->frag_blk_index = 0xFFFFFFFF;
if (proc->workers[i]->cmp == NULL) {
ret = SQFS_ERROR_ALLOC;