*
* CDDL HEADER END
*/
+
/*
- * Copyright (C) 2008-2010 Lawrence Livermore National Security, LLC.
+ * Copyright (C) 2011 Lawrence Livermore National Security, LLC.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* LLNL-CODE-403049.
*/
-#ifndef _SYS_BLKDEV_H
-#define _SYS_BLKDEV_H
-
-#ifdef _KERNEL
+#ifndef _ZFS_BLKDEV_H
+#define _ZFS_BLKDEV_H
#include <linux/blkdev.h>
#include <linux/elevator.h>
bio_for_each_segment(bvl, _iter.bio, _iter.i)
#endif /* HAVE_RQ_FOR_EACH_SEGMENT */
+/*
+ * Portable helper for correctly setting the FAILFAST flags. The
+ * correct usage has changed 3 times from 2.6.12 to 2.6.38.
+ */
static inline void
bio_set_flags_failfast(struct block_device *bdev, int *flags)
{
#endif /* HAVE_BIO_RW_FAILFAST_DTD */
}
+/*
+ * Maximum disk label length, it may be undefined for some kernels.
+ */
#ifndef DISK_NAME_LEN
#define DISK_NAME_LEN 32
#endif /* DISK_NAME_LEN */
-#endif /* KERNEL */
+/*
+ * 2.6.24 API change,
+ * The bio_end_io() prototype changed slightly. These are helper
+ * macro's to ensure the prototype and return value are handled.
+ */
+#ifdef HAVE_2ARGS_BIO_END_IO_T
+# define BIO_END_IO_PROTO(fn, x, y, z) static void fn(struct bio *x, int z)
+# define BIO_END_IO_RETURN(rc) return
+#else
+# define BIO_END_IO_PROTO(fn, x, y, z) static int fn(struct bio *x, \
+ unsigned int y, int z)
+# define BIO_END_IO_RETURN(rc) return rc
+#endif /* HAVE_2ARGS_BIO_END_IO_T */
+
+/*
+ * 2.6.28 API change
+ * Used to exclusively open a block device from within the kernel.
+ */
+#ifdef HAVE_OPEN_BDEV_EXCLUSIVE
+# define vdev_bdev_open(path, md, hld) open_bdev_exclusive(path, md, hld)
+# define vdev_bdev_close(bdev, md) close_bdev_exclusive(bdev, md)
+#else
+# define vdev_bdev_open(path, md, hld) open_bdev_excl(path, md, hld)
+# define vdev_bdev_close(bdev, md) close_bdev_excl(bdev)
+#endif /* HAVE_OPEN_BDEV_EXCLUSIVE */
+
+/*
+ * 2.6.22 API change
+ * The function invalidate_bdev() lost it's second argument because
+ * it was unused.
+ */
+#ifdef HAVE_1ARG_INVALIDATE_BDEV
+# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev)
+#else
+# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev, 1)
+#endif /* HAVE_1ARG_INVALIDATE_BDEV */
+
+/*
+ * 2.6.30 API change
+ * Change to make it explicit there this is the logical block size.
+ */
+#ifdef HAVE_BDEV_LOGICAL_BLOCK_SIZE
+# define vdev_bdev_block_size(bdev) bdev_logical_block_size(bdev)
+#else
+# define vdev_bdev_block_size(bdev) bdev_hardsect_size(bdev)
+#endif
+
+/*
+ * Default Linux IO Scheduler,
+ * Setting the scheduler to noop will allow the Linux IO scheduler to
+ * still perform front and back merging, while leaving the request
+ * ordering and prioritization to the ZFS IO scheduler.
+ */
+#define VDEV_SCHEDULER "noop"
-#endif /* _SYS_BLKDEV_H */
+#endif /* _ZFS_BLKDEV_H */
$(top_srcdir)/include/sys/zrlock.h
KERNEL_H = \
- $(top_srcdir)/include/sys/blkdev.h \
$(top_srcdir)/include/sys/zfs_ioctl.h \
$(top_srcdir)/include/sys/zfs_onexit.h \
${top_srcdir}/include/sys/zpl.h \
$(top_srcdir)/include/sys/zio.h \
$(top_srcdir)/include/sys/zio_impl.h \
$(top_srcdir)/include/sys/zrlock.h \
- $(top_srcdir)/include/sys/blkdev.h \
$(top_srcdir)/include/sys/zfs_ioctl.h \
$(top_srcdir)/include/sys/zfs_onexit.h \
${top_srcdir}/include/sys/zpl.h \
$(top_srcdir)/include/sys/zrlock.h
KERNEL_H = \
- $(top_srcdir)/include/sys/blkdev.h \
$(top_srcdir)/include/sys/zfs_ioctl.h \
$(top_srcdir)/include/sys/zfs_onexit.h \
${top_srcdir}/include/sys/zpl.h \
#include <sys/cred.h>
#include <sys/time.h>
#include <sys/uio.h>
-#ifdef _KERNEL
-#include <sys/blkdev.h>
-#endif
#ifdef __cplusplus
extern "C" {
void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
dmu_tx_t *tx);
#ifdef _KERNEL
+#include <linux/blkdev_compat.h>
int dmu_read_req(objset_t *os, uint64_t object, struct request *req);
int dmu_write_req(objset_t *os, uint64_t object, struct request *req,
dmu_tx_t *tx);
#ifndef _SYS_VDEV_DISK_H
#define _SYS_VDEV_DISK_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-
#ifdef _KERNEL
#include <sys/vdev.h>
-#include <sys/ddi.h>
-#include <sys/sunldi.h>
-#include <sys/sunddi.h>
typedef struct vdev_disk {
ddi_devid_t vd_devid;
size_t, uint64_t, int);
extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
-/* 2.6.24 API change */
-#ifdef HAVE_2ARGS_BIO_END_IO_T
-# define BIO_END_IO_PROTO(fn, x, y, z) static void fn(struct bio *x, int z)
-# define BIO_END_IO_RETURN(rc) return
-#else
-# define BIO_END_IO_PROTO(fn, x, y, z) static int fn(struct bio *x, \
- unsigned int y, int z)
-# define BIO_END_IO_RETURN(rc) return rc
-#endif /* HAVE_2ARGS_BIO_END_IO_T */
-
-/* 2.6.28 API change */
-#ifdef HAVE_OPEN_BDEV_EXCLUSIVE
-# define vdev_bdev_open(path, md, hld) open_bdev_exclusive(path, md, hld)
-# define vdev_bdev_close(bdev, md) close_bdev_exclusive(bdev, md)
-#else
-# define vdev_bdev_open(path, md, hld) open_bdev_excl(path, md, hld)
-# define vdev_bdev_close(bdev, md) close_bdev_excl(bdev)
-#endif /* HAVE_OPEN_BDEV_EXCLUSIVE */
-
-/* 2.6.22 API change */
-#ifdef HAVE_1ARG_INVALIDATE_BDEV
-# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev)
-#else
-# define vdev_bdev_invalidate(bdev) invalidate_bdev(bdev, 1)
-#endif /* HAVE_1ARG_INVALIDATE_BDEV */
-
-/* 2.6.30 API change */
-#ifdef HAVE_BDEV_LOGICAL_BLOCK_SIZE
-# define vdev_bdev_block_size(bdev) bdev_logical_block_size(bdev)
-#else
-# define vdev_bdev_block_size(bdev) bdev_hardsect_size(bdev)
-#endif
-
-/* Default Linux IO Scheduler */
-#define VDEV_SCHEDULER "noop"
-
#endif /* _KERNEL */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _SYS_VDEV_DISK_H */
+#endif /* _SYS_VDEV_DISK_H */
#ifdef _KERNEL
-#include <sys/blkdev.h>
-
extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
extern int zvol_check_volblocksize(uint64_t volblocksize);
extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
#include <sys/zfs_rlock.h>
#include <sys/zfs_znode.h>
#include <sys/zvol.h>
+#include <linux/blkdev_compat.h>
unsigned int zvol_major = ZVOL_MAJOR;
unsigned int zvol_threads = 0;