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Linux 5.18 compat: bio_alloc()

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As for the Linux 5.18 kernel bio_alloc() expects a block_device struct
as an argument.  This removes the need for the bio_set_dev() compatibility
code for 5.18 and newer kernels.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13515
This commit is contained in:
Brian Behlendorf 2022-05-27 20:28:51 +00:00
parent 152d6fda54
commit 5f264996f4
1 changed files with 39 additions and 14 deletions
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53
module/os/linux/zfs/vdev_disk.c
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@ -460,6 +460,13 @@ vdev_submit_bio_impl(struct bio *bio)
#define preempt_schedule_notrace(x) preempt_schedule(x)
#endif
/*
* As for the Linux 5.18 kernel bio_alloc() expects a block_device struct
* as an argument removing the need to set it with bio_set_dev(). This
* removes the need for all of the following compatibility code.
*/
#if !defined(HAVE_BIO_ALLOC_4ARG)
#ifdef HAVE_BIO_SET_DEV
#if defined(CONFIG_BLK_CGROUP) && defined(HAVE_BIO_SET_DEV_GPL_ONLY)
/*
@ -556,6 +563,7 @@ bio_set_dev(struct bio *bio, struct block_device *bdev)
bio->bi_bdev = bdev;
}
#endif /* HAVE_BIO_SET_DEV */
#endif /* !HAVE_BIO_ALLOC_4ARG */
static inline void
vdev_submit_bio(struct bio *bio)
@ -566,10 +574,36 @@ vdev_submit_bio(struct bio *bio)
current->bio_list = bio_list;
}
static inline struct bio *
vdev_bio_alloc(struct block_device *bdev, gfp_t gfp_mask,
unsigned short nr_vecs)
{
struct bio *bio;
#ifdef HAVE_BIO_ALLOC_4ARG
#define bio_alloc(gfp_mask, nr_iovecs) bio_alloc(NULL, nr_iovecs, 0, gfp_mask)
bio = bio_alloc(bdev, nr_vecs, 0, gfp_mask);
#else
bio = bio_alloc(gfp_mask, nr_vecs);
if (likely(bio != NULL))
bio_set_dev(bio, bdev);
#endif
return (bio);
}
static inline unsigned int
vdev_bio_max_segs(zio_t *zio, int bio_size, uint64_t abd_offset)
{
unsigned long nr_segs = abd_nr_pages_off(zio->io_abd,
bio_size, abd_offset);
#ifdef HAVE_BIO_MAX_SEGS
return (bio_max_segs(nr_segs));
#else
return (MIN(nr_segs, BIO_MAX_PAGES));
#endif
}
static int
__vdev_disk_physio(struct block_device *bdev, zio_t *zio,
size_t io_size, uint64_t io_offset, int rw, int flags)
@ -581,6 +615,7 @@ __vdev_disk_physio(struct block_device *bdev, zio_t *zio,
int bio_count = 16;
int error = 0;
struct blk_plug plug;
unsigned short nr_vecs;
/*
* Accessing outside the block device is never allowed.
@ -632,15 +667,8 @@ retry:
goto retry;
}
/* bio_alloc() with __GFP_WAIT never returns NULL */
#ifdef HAVE_BIO_MAX_SEGS
dr->dr_bio[i] = bio_alloc(GFP_NOIO, bio_max_segs(
abd_nr_pages_off(zio->io_abd, bio_size, abd_offset)));
#else
dr->dr_bio[i] = bio_alloc(GFP_NOIO,
MIN(abd_nr_pages_off(zio->io_abd, bio_size, abd_offset),
BIO_MAX_PAGES));
#endif
nr_vecs = vdev_bio_max_segs(zio, bio_size, abd_offset);
dr->dr_bio[i] = vdev_bio_alloc(bdev, GFP_NOIO, nr_vecs);
if (unlikely(dr->dr_bio[i] == NULL)) {
vdev_disk_dio_free(dr);
return (SET_ERROR(ENOMEM));
@ -649,7 +677,6 @@ retry:
/* Matching put called by vdev_disk_physio_completion */
vdev_disk_dio_get(dr);
bio_set_dev(dr->dr_bio[i], bdev);
BIO_BI_SECTOR(dr->dr_bio[i]) = bio_offset >> 9;
dr->dr_bio[i]->bi_end_io = vdev_disk_physio_completion;
dr->dr_bio[i]->bi_private = dr;
@ -713,14 +740,12 @@ vdev_disk_io_flush(struct block_device *bdev, zio_t *zio)
if (!q)
return (SET_ERROR(ENXIO));
bio = bio_alloc(GFP_NOIO, 0);
/* bio_alloc() with __GFP_WAIT never returns NULL */
bio = vdev_bio_alloc(bdev, GFP_NOIO, 0);
if (unlikely(bio == NULL))
return (SET_ERROR(ENOMEM));
bio->bi_end_io = vdev_disk_io_flush_completion;
bio->bi_private = zio;
bio_set_dev(bio, bdev);
bio_set_flush(bio);
vdev_submit_bio(bio);
invalidate_bdev(bdev);