26 struct workspace {  struct
39 	struct workspace *workspace = list_entry(ws, struct workspace, list);  in zlib_get_workspace()  local
41 	workspace->level = level;  in zlib_get_workspace()
48 	struct workspace *workspace = list_entry(ws, struct workspace, list);  in zlib_free_workspace()  local
50 	kvfree(workspace->strm.workspace);  in zlib_free_workspace()
51 	kfree(workspace->buf);  in zlib_free_workspace()
52 	kfree(workspace);  in zlib_free_workspace()
57 	struct workspace *workspace;  in zlib_alloc_workspace()  local
60 	workspace = kzalloc(sizeof(*workspace), GFP_KERNEL);  in zlib_alloc_workspace()
61 	if (!workspace)  in zlib_alloc_workspace()
66 	workspace->strm.workspace = kvzalloc(workspacesize, GFP_KERNEL | __GFP_NOWARN);  in zlib_alloc_workspace()
67 	workspace->level = level;  in zlib_alloc_workspace()
68 	workspace->buf = NULL;  in zlib_alloc_workspace()
74 		workspace->buf = kmalloc(ZLIB_DFLTCC_BUF_SIZE,  in zlib_alloc_workspace()
77 		workspace->buf_size = ZLIB_DFLTCC_BUF_SIZE;  in zlib_alloc_workspace()
79 	if (!workspace->buf) {  in zlib_alloc_workspace()
80 		workspace->buf = kmalloc(PAGE_SIZE, GFP_KERNEL);  in zlib_alloc_workspace()
81 		workspace->buf_size = PAGE_SIZE;  in zlib_alloc_workspace()
83 	if (!workspace->strm.workspace || !workspace->buf)  in zlib_alloc_workspace()
86 	INIT_LIST_HEAD(&workspace->list);  in zlib_alloc_workspace()
88 	return &workspace->list;  in zlib_alloc_workspace()
90 	zlib_free_workspace(&workspace->list);  in zlib_alloc_workspace()
98 	struct workspace *workspace = list_entry(ws, struct workspace, list);  in zlib_compress_pages()  local
115 	if (Z_OK != zlib_deflateInit(&workspace->strm, workspace->level)) {  in zlib_compress_pages()
121 	workspace->strm.total_in = 0;  in zlib_compress_pages()
122 	workspace->strm.total_out = 0;  in zlib_compress_pages()
133 	workspace->strm.next_in = workspace->buf;  in zlib_compress_pages()
134 	workspace->strm.avail_in = 0;  in zlib_compress_pages()
135 	workspace->strm.next_out = cpage_out;  in zlib_compress_pages()
136 	workspace->strm.avail_out = PAGE_SIZE;  in zlib_compress_pages()
138 	while (workspace->strm.total_in < len) {  in zlib_compress_pages()
143 		if (workspace->strm.avail_in == 0) {  in zlib_compress_pages()
144 			bytes_left = len - workspace->strm.total_in;  in zlib_compress_pages()
146 					   workspace->buf_size / PAGE_SIZE);  in zlib_compress_pages()
158 					copy_page(workspace->buf + i * PAGE_SIZE,  in zlib_compress_pages()
162 				workspace->strm.next_in = workspace->buf;  in zlib_compress_pages()
172 				workspace->strm.next_in = data_in;  in zlib_compress_pages()
174 			workspace->strm.avail_in = min(bytes_left,  in zlib_compress_pages()
175 						       (unsigned long) workspace->buf_size);  in zlib_compress_pages()
178 		ret = zlib_deflate(&workspace->strm, Z_SYNC_FLUSH);  in zlib_compress_pages()
182 			zlib_deflateEnd(&workspace->strm);  in zlib_compress_pages()
188 		if (workspace->strm.total_in > 8192 &&  in zlib_compress_pages()
189 		    workspace->strm.total_in <  in zlib_compress_pages()
190 		    workspace->strm.total_out) {  in zlib_compress_pages()
198 		if (workspace->strm.avail_out == 0) {  in zlib_compress_pages()
211 			workspace->strm.avail_out = PAGE_SIZE;  in zlib_compress_pages()
212 			workspace->strm.next_out = cpage_out;  in zlib_compress_pages()
215 		if (workspace->strm.total_in >= len)  in zlib_compress_pages()
217 		if (workspace->strm.total_out > max_out)  in zlib_compress_pages()
220 	workspace->strm.avail_in = 0;  in zlib_compress_pages()
226 		ret = zlib_deflate(&workspace->strm, Z_FINISH);  in zlib_compress_pages()
230 			zlib_deflateEnd(&workspace->strm);  in zlib_compress_pages()
233 		} else if (workspace->strm.avail_out == 0) {  in zlib_compress_pages()
247 			workspace->strm.avail_out = PAGE_SIZE;  in zlib_compress_pages()
248 			workspace->strm.next_out = cpage_out;  in zlib_compress_pages()
251 	zlib_deflateEnd(&workspace->strm);  in zlib_compress_pages()
253 	if (workspace->strm.total_out >= workspace->strm.total_in) {  in zlib_compress_pages()
259 	*total_out = workspace->strm.total_out;  in zlib_compress_pages()
260 	*total_in = workspace->strm.total_in;  in zlib_compress_pages()
273 	struct workspace *workspace = list_entry(ws, struct workspace, list);  in zlib_decompress_bio()  local
285 	workspace->strm.next_in = data_in;  in zlib_decompress_bio()
286 	workspace->strm.avail_in = min_t(size_t, srclen, PAGE_SIZE);  in zlib_decompress_bio()
287 	workspace->strm.total_in = 0;  in zlib_decompress_bio()
289 	workspace->strm.total_out = 0;  in zlib_decompress_bio()
290 	workspace->strm.next_out = workspace->buf;  in zlib_decompress_bio()
291 	workspace->strm.avail_out = workspace->buf_size;  in zlib_decompress_bio()
300 		workspace->strm.next_in += 2;  in zlib_decompress_bio()
301 		workspace->strm.avail_in -= 2;  in zlib_decompress_bio()
304 	if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) {  in zlib_decompress_bio()
309 	while (workspace->strm.total_in < srclen) {  in zlib_decompress_bio()
310 		ret = zlib_inflate(&workspace->strm, Z_NO_FLUSH);  in zlib_decompress_bio()
315 		total_out = workspace->strm.total_out;  in zlib_decompress_bio()
321 		ret2 = btrfs_decompress_buf2page(workspace->buf,  in zlib_decompress_bio()
328 		workspace->strm.next_out = workspace->buf;  in zlib_decompress_bio()
329 		workspace->strm.avail_out = workspace->buf_size;  in zlib_decompress_bio()
331 		if (workspace->strm.avail_in == 0) {  in zlib_decompress_bio()
340 			workspace->strm.next_in = data_in;  in zlib_decompress_bio()
341 			tmp = srclen - workspace->strm.total_in;  in zlib_decompress_bio()
342 			workspace->strm.avail_in = min(tmp, PAGE_SIZE);  in zlib_decompress_bio()
350 	zlib_inflateEnd(&workspace->strm);  in zlib_decompress_bio()
360 	struct workspace *workspace = list_entry(ws, struct workspace, list);  in zlib_decompress()  local
370 	workspace->strm.next_in = data_in;  in zlib_decompress()
371 	workspace->strm.avail_in = srclen;  in zlib_decompress()
372 	workspace->strm.total_in = 0;  in zlib_decompress()
374 	workspace->strm.next_out = workspace->buf;  in zlib_decompress()
375 	workspace->strm.avail_out = workspace->buf_size;  in zlib_decompress()
376 	workspace->strm.total_out = 0;  in zlib_decompress()
384 		workspace->strm.next_in += 2;  in zlib_decompress()
385 		workspace->strm.avail_in -= 2;  in zlib_decompress()
388 	if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) {  in zlib_decompress()
398 		ret = zlib_inflate(&workspace->strm, Z_NO_FLUSH);  in zlib_decompress()
403 		total_out = workspace->strm.total_out;  in zlib_decompress()
423 			       workspace->buf + buf_offset, bytes);  in zlib_decompress()
428 		workspace->strm.next_out = workspace->buf;  in zlib_decompress()
429 		workspace->strm.avail_out = workspace->buf_size;  in zlib_decompress()
437 	zlib_inflateEnd(&workspace->strm);  in zlib_decompress()