diff --git a/libc/kernel/common/linux/bio.h b/libc/kernel/common/linux/bio.h
new file mode 100644
index 0000000..4e91314
--- /dev/null
+++ b/libc/kernel/common/linux/bio.h
@@ -0,0 +1,171 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __LINUX_BIO_H
+#define __LINUX_BIO_H
+
+#include <linux/highmem.h>
+#include <linux/mempool.h>
+#include <linux/ioprio.h>
+
+#include <asm/io.h>
+
+#if defined(BIO_VMERGE_MAX_SIZE) && defined(BIO_VMERGE_BOUNDARY)
+#define BIOVEC_VIRT_START_SIZE(x) (bvec_to_phys(x) & (BIO_VMERGE_BOUNDARY - 1))
+#define BIOVEC_VIRT_OVERSIZE(x) ((x) > BIO_VMERGE_MAX_SIZE)
+#else
+#define BIOVEC_VIRT_START_SIZE(x) 0
+#define BIOVEC_VIRT_OVERSIZE(x) 0
+#endif
+
+#ifndef BIO_VMERGE_BOUNDARY
+#define BIO_VMERGE_BOUNDARY 0
+#endif
+
+#define BIO_DEBUG
+
+#ifdef BIO_DEBUG
+#define BIO_BUG_ON BUG_ON
+#else
+#define BIO_BUG_ON
+#endif
+
+#define BIO_MAX_PAGES 256
+#define BIO_MAX_SIZE (BIO_MAX_PAGES << PAGE_CACHE_SHIFT)
+#define BIO_MAX_SECTORS (BIO_MAX_SIZE >> 9)
+
+struct bio_vec {
+ struct page *bv_page;
+ unsigned int bv_len;
+ unsigned int bv_offset;
+};
+
+struct bio_set;
+struct bio;
+typedef int (bio_end_io_t) (struct bio *, unsigned int, int);
+typedef void (bio_destructor_t) (struct bio *);
+
+struct bio {
+ sector_t bi_sector;
+ struct bio *bi_next;
+ struct block_device *bi_bdev;
+ unsigned long bi_flags;
+ unsigned long bi_rw;
+
+ unsigned short bi_vcnt;
+ unsigned short bi_idx;
+
+ unsigned short bi_phys_segments;
+
+ unsigned short bi_hw_segments;
+
+ unsigned int bi_size;
+
+ unsigned int bi_hw_front_size;
+ unsigned int bi_hw_back_size;
+
+ unsigned int bi_max_vecs;
+
+ struct bio_vec *bi_io_vec;
+
+ bio_end_io_t *bi_end_io;
+ atomic_t bi_cnt;
+
+ void *bi_private;
+
+ bio_destructor_t *bi_destructor;
+};
+
+#define BIO_UPTODATE 0  
+#define BIO_RW_BLOCK 1  
+#define BIO_EOF 2  
+#define BIO_SEG_VALID 3  
+#define BIO_CLONED 4  
+#define BIO_BOUNCED 5  
+#define BIO_USER_MAPPED 6  
+#define BIO_EOPNOTSUPP 7  
+#define bio_flagged(bio, flag) ((bio)->bi_flags & (1 << (flag)))
+
+#define BIO_POOL_BITS (4)
+#define BIO_POOL_OFFSET (BITS_PER_LONG - BIO_POOL_BITS)
+#define BIO_POOL_MASK (1UL << BIO_POOL_OFFSET)
+#define BIO_POOL_IDX(bio) ((bio)->bi_flags >> BIO_POOL_OFFSET) 
+
+#define BIO_RW 0
+#define BIO_RW_AHEAD 1
+#define BIO_RW_BARRIER 2
+#define BIO_RW_FAILFAST 3
+#define BIO_RW_SYNC 4
+
+#define BIO_PRIO_SHIFT (8 * sizeof(unsigned long) - IOPRIO_BITS)
+#define bio_prio(bio) ((bio)->bi_rw >> BIO_PRIO_SHIFT)
+#define bio_prio_valid(bio) ioprio_valid(bio_prio(bio))
+
+#define bio_set_prio(bio, prio) do {   WARN_ON(prio >= (1 << IOPRIO_BITS));   (bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1);   (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT);  } while (0)
+
+#define bio_iovec_idx(bio, idx) (&((bio)->bi_io_vec[(idx)]))
+#define bio_iovec(bio) bio_iovec_idx((bio), (bio)->bi_idx)
+#define bio_page(bio) bio_iovec((bio))->bv_page
+#define bio_offset(bio) bio_iovec((bio))->bv_offset
+#define bio_segments(bio) ((bio)->bi_vcnt - (bio)->bi_idx)
+#define bio_sectors(bio) ((bio)->bi_size >> 9)
+#define bio_cur_sectors(bio) (bio_iovec(bio)->bv_len >> 9)
+#define bio_data(bio) (page_address(bio_page((bio))) + bio_offset((bio)))
+#define bio_barrier(bio) ((bio)->bi_rw & (1 << BIO_RW_BARRIER))
+#define bio_sync(bio) ((bio)->bi_rw & (1 << BIO_RW_SYNC))
+#define bio_failfast(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST))
+#define bio_rw_ahead(bio) ((bio)->bi_rw & (1 << BIO_RW_AHEAD))
+
+#define bio_to_phys(bio) (page_to_phys(bio_page((bio))) + (unsigned long) bio_offset((bio)))
+#define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset)
+
+#define __bio_kmap_atomic(bio, idx, kmtype)   (kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page, kmtype) +   bio_iovec_idx((bio), (idx))->bv_offset)
+
+#define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr, kmtype)
+
+#define __BVEC_END(bio) bio_iovec_idx((bio), (bio)->bi_vcnt - 1)
+#define __BVEC_START(bio) bio_iovec_idx((bio), (bio)->bi_idx)
+
+#ifndef BIOVEC_PHYS_MERGEABLE
+#define BIOVEC_PHYS_MERGEABLE(vec1, vec2)   ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
+#endif
+
+#define BIOVEC_VIRT_MERGEABLE(vec1, vec2)   ((((bvec_to_phys((vec1)) + (vec1)->bv_len) | bvec_to_phys((vec2))) & (BIO_VMERGE_BOUNDARY - 1)) == 0)
+#define __BIO_SEG_BOUNDARY(addr1, addr2, mask)   (((addr1) | (mask)) == (((addr2) - 1) | (mask)))
+#define BIOVEC_SEG_BOUNDARY(q, b1, b2)   __BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, (q)->seg_boundary_mask)
+#define BIO_SEG_BOUNDARY(q, b1, b2)   BIOVEC_SEG_BOUNDARY((q), __BVEC_END((b1)), __BVEC_START((b2)))
+
+#define bio_io_error(bio, bytes) bio_endio((bio), (bytes), -EIO)
+
+#define __bio_for_each_segment(bvl, bio, i, start_idx)   for (bvl = bio_iovec_idx((bio), (start_idx)), i = (start_idx);   i < (bio)->bi_vcnt;   bvl++, i++)
+
+#define bio_for_each_segment(bvl, bio, i)   __bio_for_each_segment(bvl, bio, i, (bio)->bi_idx)
+
+#define bio_get(bio) atomic_inc(&(bio)->bi_cnt)
+
+struct bio_pair {
+ struct bio bio1, bio2;
+ struct bio_vec bv1, bv2;
+ atomic_t cnt;
+ int error;
+};
+
+struct request_queue;
+
+struct sg_iovec;
+
+#define bvec_kmap_irq(bvec, flags) (page_address((bvec)->bv_page) + (bvec)->bv_offset)
+#define bvec_kunmap_irq(buf, flags) do { *(flags) = 0; } while (0)
+
+#define __bio_kunmap_irq(buf, flags) bvec_kunmap_irq(buf, flags)
+#define bio_kmap_irq(bio, flags)   __bio_kmap_irq((bio), (bio)->bi_idx, (flags))
+#define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags)
+#endif