C++ (Cpp) dm_io_client_destroy Examples

Example #1

File: dm-log.c Project: acton393/linux

static void disk_dtr(struct dm_dirty_log *log)
{
	struct log_c *lc = (struct log_c *) log->context;

	dm_put_device(lc->ti, lc->log_dev);
	vfree(lc->disk_header);
	dm_io_client_destroy(lc->io_req.client);
	destroy_log_context(lc);
}

Example #2

static void disk_dtr(struct dirty_log *log)
{
	struct log_c *lc = (struct log_c *) log->context;
	dm_put_device(lc->ti, lc->log_dev);
	dm_io_client_destroy(lc->io_req.client);
	vfree(lc->disk_header);
	lc->clean_bits = NULL;
	core_dtr(log);
}

Example #3

File: iostash_module.c Project: ETSENGENEERINGSYSTEMS/iostash

static void _free_resource(void)
{
	ssd_unregister_all();
	hdd_unregister_all();

	if (gctx.pdm) {
		pdm_destroy(gctx.pdm);
		gctx.pdm = NULL;
	}
	if (gctx.sce) {
		sce_destroy(gctx.sce);
		gctx.sce = NULL;
	}
	if (gctx.io_client) {
		dm_io_client_destroy(gctx.io_client);
		gctx.io_client = NULL;
	}
	if (gctx.io_pool) {
		kmem_cache_destroy(gctx.io_pool);
		gctx.io_pool = NULL;
	}
}

Example #4

File: dm-log.c Project: acton393/linux

static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
			      unsigned int argc, char **argv,
			      struct dm_dev *dev)
{
	enum sync sync = DEFAULTSYNC;

	struct log_c *lc;
	uint32_t region_size;
	unsigned int region_count;
	size_t bitset_size, buf_size;
	int r;
	char dummy;

	if (argc < 1 || argc > 2) {
		DMWARN("wrong number of arguments to dirty region log");
		return -EINVAL;
	}

	if (argc > 1) {
		if (!strcmp(argv[1], "sync"))
			sync = FORCESYNC;
		else if (!strcmp(argv[1], "nosync"))
			sync = NOSYNC;
		else {
			DMWARN("unrecognised sync argument to "
			       "dirty region log: %s", argv[1]);
			return -EINVAL;
		}
	}

	if (sscanf(argv[0], "%u%c", &region_size, &dummy) != 1 ||
	    !_check_region_size(ti, region_size)) {
		DMWARN("invalid region size %s", argv[0]);
		return -EINVAL;
	}

	region_count = dm_sector_div_up(ti->len, region_size);

	lc = kmalloc(sizeof(*lc), GFP_KERNEL);
	if (!lc) {
		DMWARN("couldn't allocate core log");
		return -ENOMEM;
	}

	lc->ti = ti;
	lc->touched_dirtied = 0;
	lc->touched_cleaned = 0;
	lc->flush_failed = 0;
	lc->region_size = region_size;
	lc->region_count = region_count;
	lc->sync = sync;

	/*
	 * Work out how many "unsigned long"s we need to hold the bitset.
	 */
	bitset_size = dm_round_up(region_count,
				  sizeof(*lc->clean_bits) << BYTE_SHIFT);
	bitset_size >>= BYTE_SHIFT;

	lc->bitset_uint32_count = bitset_size / sizeof(*lc->clean_bits);

	/*
	 * Disk log?
	 */
	if (!dev) {
		lc->clean_bits = vmalloc(bitset_size);
		if (!lc->clean_bits) {
			DMWARN("couldn't allocate clean bitset");
			kfree(lc);
			return -ENOMEM;
		}
		lc->disk_header = NULL;
	} else {
		lc->log_dev = dev;
		lc->log_dev_failed = 0;
		lc->log_dev_flush_failed = 0;
		lc->header_location.bdev = lc->log_dev->bdev;
		lc->header_location.sector = 0;

		/*
		 * Buffer holds both header and bitset.
		 */
		buf_size =
		    dm_round_up((LOG_OFFSET << SECTOR_SHIFT) + bitset_size,
				bdev_logical_block_size(lc->header_location.
							    bdev));

		if (buf_size > i_size_read(dev->bdev->bd_inode)) {
			DMWARN("log device %s too small: need %llu bytes",
				dev->name, (unsigned long long)buf_size);
			kfree(lc);
			return -EINVAL;
		}

		lc->header_location.count = buf_size >> SECTOR_SHIFT;

		lc->io_req.mem.type = DM_IO_VMA;
		lc->io_req.notify.fn = NULL;
		lc->io_req.client = dm_io_client_create();
		if (IS_ERR(lc->io_req.client)) {
			r = PTR_ERR(lc->io_req.client);
			DMWARN("couldn't allocate disk io client");
			kfree(lc);
			return r;
		}

		lc->disk_header = vmalloc(buf_size);
		if (!lc->disk_header) {
			DMWARN("couldn't allocate disk log buffer");
			dm_io_client_destroy(lc->io_req.client);
			kfree(lc);
			return -ENOMEM;
		}

		lc->io_req.mem.ptr.vma = lc->disk_header;
		lc->clean_bits = (void *)lc->disk_header +
				 (LOG_OFFSET << SECTOR_SHIFT);
	}

	memset(lc->clean_bits, -1, bitset_size);

	lc->sync_bits = vmalloc(bitset_size);
	if (!lc->sync_bits) {
		DMWARN("couldn't allocate sync bitset");
		if (!dev)
			vfree(lc->clean_bits);
		else
			dm_io_client_destroy(lc->io_req.client);
		vfree(lc->disk_header);
		kfree(lc);
		return -ENOMEM;
	}
	memset(lc->sync_bits, (sync == NOSYNC) ? -1 : 0, bitset_size);
	lc->sync_count = (sync == NOSYNC) ? region_count : 0;

	lc->recovering_bits = vzalloc(bitset_size);
	if (!lc->recovering_bits) {
		DMWARN("couldn't allocate sync bitset");
		vfree(lc->sync_bits);
		if (!dev)
			vfree(lc->clean_bits);
		else
			dm_io_client_destroy(lc->io_req.client);
		vfree(lc->disk_header);
		kfree(lc);
		return -ENOMEM;
	}
	lc->sync_search = 0;
	log->context = lc;

	return 0;
}