From 41d33212c94d3f9efd43e0c40dd166c2136512a8 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Mon, 23 Sep 2019 16:12:52 +0200 Subject: Cleanup block processor flag handling First, remove the "Don't checksum" flag, fragment blocks also need to be checksumed and are also subject to deduplication. For sentinel blocks, instead check if the size is zero. Second, cleanly seperate the user settable flags from the non-user settable flags and reject any block that has non-user settable or unknown flags set. Signed-off-by: David Oberhollenzer --- lib/sqfs/blk_proc/process_block.c | 3 +-- lib/sqfs/blk_proc/pthread.c | 7 +++++-- lib/sqfs/blk_proc/serial.c | 14 ++++++++++++-- 3 files changed, 18 insertions(+), 6 deletions(-) (limited to 'lib/sqfs') diff --git a/lib/sqfs/blk_proc/process_block.c b/lib/sqfs/blk_proc/process_block.c index 0747bc5..5d1fa58 100644 --- a/lib/sqfs/blk_proc/process_block.c +++ b/lib/sqfs/blk_proc/process_block.c @@ -15,8 +15,7 @@ int sqfs_block_process(sqfs_block_t *block, sqfs_compressor_t *cmp, { ssize_t ret; - if (!(block->flags & SQFS_BLK_DONT_CHECKSUM)) - block->checksum = crc32(0, block->data, block->size); + block->checksum = crc32(0, block->data, block->size); if (!(block->flags & SQFS_BLK_DONT_COMPRESS)) { ret = cmp->do_block(cmp, block->data, block->size, diff --git a/lib/sqfs/blk_proc/pthread.c b/lib/sqfs/blk_proc/pthread.c index a9cffd0..f1874c0 100644 --- a/lib/sqfs/blk_proc/pthread.c +++ b/lib/sqfs/blk_proc/pthread.c @@ -193,12 +193,15 @@ int sqfs_block_processor_enqueue(sqfs_block_processor_t *proc, { sqfs_block_t *queue = NULL, *it, *prev; + if (block->flags & ~SQFS_BLK_USER_SETTABLE_FLAGS) + return SQFS_ERROR_UNSUPPORTED; + block->sequence_number = proc->enqueue_id++; block->next = NULL; pthread_mutex_lock(&proc->mtx); - if ((block->flags & SQFS_BLK_DONT_COMPRESS) && - (block->flags & SQFS_BLK_DONT_CHECKSUM)) { + if (block->size == 0) { + block->checksum = 0; store_completed_block(proc, block); } else { while (proc->backlog > proc->max_backlog) diff --git a/lib/sqfs/blk_proc/serial.c b/lib/sqfs/blk_proc/serial.c index b6c17fb..b7bc545 100644 --- a/lib/sqfs/blk_proc/serial.c +++ b/lib/sqfs/blk_proc/serial.c @@ -51,8 +51,18 @@ int sqfs_block_processor_enqueue(sqfs_block_processor_t *proc, return proc->status; } - proc->status = sqfs_block_process(block, proc->cmp, - proc->scratch, proc->max_block_size); + if (block->flags & ~SQFS_BLK_USER_SETTABLE_FLAGS) { + proc->status = SQFS_ERROR_UNSUPPORTED; + return proc->status; + } + + if (block->size == 0) { + block->checksum = 0; + } else { + proc->status = sqfs_block_process(block, proc->cmp, + proc->scratch, + proc->max_block_size); + } block->next = NULL; return process_completed_blocks(proc, block); -- cgit v1.2.3