+static int write_inline_data(struct log_writes_c *lc, void *entry,
+ size_t entrylen, void *data, size_t datalen,
+ sector_t sector)
+{
+ int num_pages, bio_pages, pg_datalen, pg_sectorlen, i;
+ struct page *page;
+ struct bio *bio;
+ size_t ret;
+ void *ptr;
+
+ while (datalen) {
+ num_pages = ALIGN(datalen, PAGE_SIZE) >> PAGE_SHIFT;
+ bio_pages = min(num_pages, BIO_MAX_PAGES);
+
+ atomic_inc(&lc->io_blocks);
+
+ bio = bio_alloc(GFP_KERNEL, bio_pages);
+ if (!bio) {
+ DMERR("Couldn't alloc inline data bio");
+ goto error;
+ }
+
+ bio->bi_iter.bi_size = 0;
+ bio->bi_iter.bi_sector = sector;
+ bio_set_dev(bio, lc->logdev->bdev);
+ bio->bi_end_io = log_end_io;
+ bio->bi_private = lc;
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+
+ for (i = 0; i < bio_pages; i++) {
+ pg_datalen = min_t(int, datalen, PAGE_SIZE);
+ pg_sectorlen = ALIGN(pg_datalen, lc->sectorsize);
+
+ page = alloc_page(GFP_KERNEL);
+ if (!page) {
+ DMERR("Couldn't alloc inline data page");
+ goto error_bio;
+ }
+
+ ptr = kmap_atomic(page);
+ memcpy(ptr, data, pg_datalen);
+ if (pg_sectorlen > pg_datalen)
+ memset(ptr + pg_datalen, 0, pg_sectorlen - pg_datalen);
+ kunmap_atomic(ptr);
+
+ ret = bio_add_page(bio, page, pg_sectorlen, 0);
+ if (ret != pg_sectorlen) {
+ DMERR("Couldn't add page of inline data");
+ __free_page(page);
+ goto error_bio;
+ }
+
+ datalen -= pg_datalen;
+ data += pg_datalen;
+ }
+ submit_bio(bio);
+
+ sector += bio_pages * PAGE_SECTORS;
+ }
+ return 0;
+error_bio:
+ bio_free_pages(bio);
+ bio_put(bio);
+error:
+ put_io_block(lc);
+ return -1;
+}
+