diff options
Diffstat (limited to 'src/kernel/xloop_file_fmt_raw.c')
| -rw-r--r-- | src/kernel/xloop_file_fmt_raw.c | 108 |
1 files changed, 2 insertions, 106 deletions
diff --git a/src/kernel/xloop_file_fmt_raw.c b/src/kernel/xloop_file_fmt_raw.c index f77476f..5f8d453 100644 --- a/src/kernel/xloop_file_fmt_raw.c +++ b/src/kernel/xloop_file_fmt_raw.c @@ -34,68 +34,6 @@ static inline loff_t __raw_file_fmt_rq_get_pos(struct xloop_file_fmt *xlo_fmt, s return ((loff_t)blk_rq_pos(rq) << 9) + xlo->xlo_offset; } -/* transfer function for DEPRECATED cryptoxloop support */ -static inline int __raw_file_fmt_do_transfer(struct xloop_device *xlo, int cmd, struct page *rpage, unsigned int roffs, - struct page *lpage, unsigned int loffs, int size, sector_t rblock) -{ - int ret; - - ret = xlo->transfer(xlo, cmd, rpage, roffs, lpage, loffs, size, rblock); - if (likely(!ret)) - return 0; - - pr_err_ratelimited("transfer error at byte offset %llu, length %i.\n", (unsigned long long)rblock << 9, size); - return ret; -} - -static int __raw_file_fmt_read_transfer(struct xloop_device *xlo, struct request *rq, loff_t pos) -{ - struct bio_vec bvec, b; - struct req_iterator iter; - struct iov_iter i; - struct page *page; - ssize_t len; - int ret = 0; - - page = alloc_page(GFP_NOIO); - if (unlikely(!page)) - return -ENOMEM; - - rq_for_each_segment(bvec, rq, iter) { - loff_t offset = pos; - - b.bv_page = page; - b.bv_offset = 0; - b.bv_len = bvec.bv_len; - - iov_iter_bvec(&i, READ, &b, 1, b.bv_len); - len = vfs_iter_read(xlo->xlo_backing_file, &i, &pos, 0); - if (len < 0) { - ret = len; - goto out_free_page; - } - - ret = __raw_file_fmt_do_transfer(xlo, READ, page, 0, bvec.bv_page, bvec.bv_offset, len, offset >> 9); - if (ret) - goto out_free_page; - - flush_dcache_page(bvec.bv_page); - - if (len != bvec.bv_len) { - struct bio *bio; - - __rq_for_each_bio(bio, rq) - zero_fill_bio(bio); - break; - } - } - - ret = 0; -out_free_page: - __free_page(page); - return ret; -} - static int raw_file_fmt_read(struct xloop_file_fmt *xlo_fmt, struct request *rq) { struct bio_vec bvec; @@ -108,11 +46,8 @@ static int raw_file_fmt_read(struct xloop_file_fmt *xlo_fmt, struct request *rq) xlo = xloop_file_fmt_get_xlo(xlo_fmt); pos = __raw_file_fmt_rq_get_pos(xlo_fmt, rq); - if (xlo->transfer) - return __raw_file_fmt_read_transfer(xlo, rq, pos); - rq_for_each_segment(bvec, rq, iter) { - iov_iter_bvec(&i, READ, &bvec, 1, bvec.bv_len); + iov_iter_bvec(&i, READ, &bvec, 1, bvec.bv_len); // READ -> ITER_DEST at some point len = vfs_iter_read(xlo->xlo_backing_file, &i, &pos, 0); if (len < 0) return len; @@ -286,40 +221,6 @@ static int __raw_file_fmt_write_bvec(struct file *file, struct bio_vec *bvec, lo return bw; } -/* - * This is the slow, transforming version that needs to double buffer the - * data as it cannot do the transformations in place without having direct - * access to the destination pages of the backing file. - */ -static int __raw_file_fmt_write_transfer(struct xloop_device *xlo, struct request *rq, loff_t pos) -{ - struct bio_vec bvec, b; - struct req_iterator iter; - struct page *page; - int ret = 0; - - page = alloc_page(GFP_NOIO); - if (unlikely(!page)) - return -ENOMEM; - - rq_for_each_segment(bvec, rq, iter) { - ret = __raw_file_fmt_do_transfer(xlo, WRITE, page, 0, bvec.bv_page, bvec.bv_offset, bvec.bv_len, - pos >> 9); - if (unlikely(ret)) - break; - - b.bv_page = page; - b.bv_offset = 0; - b.bv_len = bvec.bv_len; - ret = __raw_file_fmt_write_bvec(xlo->xlo_backing_file, &b, &pos); - if (ret < 0) - break; - } - - __free_page(page); - return ret; -} - static int raw_file_fmt_write(struct xloop_file_fmt *xlo_fmt, struct request *rq) { struct bio_vec bvec; @@ -331,9 +232,6 @@ static int raw_file_fmt_write(struct xloop_file_fmt *xlo_fmt, struct request *rq xlo = xloop_file_fmt_get_xlo(xlo_fmt); pos = __raw_file_fmt_rq_get_pos(xlo_fmt, rq); - if (xlo->transfer) - return __raw_file_fmt_write_transfer(xlo, rq, pos); - rq_for_each_segment(bvec, rq, iter) { ret = __raw_file_fmt_write_bvec(xlo->xlo_backing_file, &bvec, &pos); if (ret < 0) @@ -357,9 +255,7 @@ static int __raw_file_fmt_fallocate(struct xloop_device *xlo, struct request *rq { /* * We use fallocate to manipulate the space mappings used by the image - * a.k.a. discard/zerorange. However we do not support this if - * encryption is enabled, because it may give an attacker useful - * information. + * a.k.a. discard/zerorange. */ struct file *file = xlo->xlo_backing_file; int ret; |