On Tue, Nov 9, 2021 at 12:33 AM Christoph Hellwig <hch@xxxxxx> wrote: > > Just open code the block size and dax_dev == NULL checks in the callers. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > Acked-by: Mike Snitzer <snitzer@xxxxxxxxxx> You dropped Gao Xiang's reviewed-by: https://lore.kernel.org/r/YW1nrxmaw5CfFXBb@B-P7TQMD6M-0146.local ...and Darrick's https://lore.kernel.org/r/20211019154447.GL24282@magnolia ...which had a few more review comments below, otherwise you can also add: Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx> > --- > drivers/dax/super.c | 36 ------------------------------------ > drivers/md/dm-table.c | 22 +++++++++++----------- > drivers/md/dm.c | 21 --------------------- > drivers/md/dm.h | 4 ---- > drivers/nvdimm/pmem.c | 1 - > drivers/s390/block/dcssblk.c | 1 - > fs/erofs/super.c | 11 +++++++---- > fs/ext2/super.c | 6 ++++-- > fs/ext4/super.c | 9 ++++++--- > fs/xfs/xfs_super.c | 21 ++++++++------------- > include/linux/dax.h | 14 -------------- > 11 files changed, 36 insertions(+), 110 deletions(-) > > diff --git a/drivers/dax/super.c b/drivers/dax/super.c > index 482fe775324a4..803942586d1b6 100644 > --- a/drivers/dax/super.c > +++ b/drivers/dax/super.c > @@ -108,42 +108,6 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) > return dax_dev; > } > EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev); > - > -bool generic_fsdax_supported(struct dax_device *dax_dev, > - struct block_device *bdev, int blocksize, sector_t start, > - sector_t sectors) > -{ > - if (blocksize != PAGE_SIZE) { > - pr_info("%pg: error: unsupported blocksize for dax\n", bdev); > - return false; > - } > - > - if (!dax_dev) { > - pr_debug("%pg: error: dax unsupported by block device\n", bdev); > - return false; > - } > - > - return true; > -} > -EXPORT_SYMBOL_GPL(generic_fsdax_supported); > - > -bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev, > - int blocksize, sector_t start, sector_t len) > -{ > - bool ret = false; > - int id; > - > - if (!dax_dev) > - return false; > - > - id = dax_read_lock(); > - if (dax_alive(dax_dev) && dax_dev->ops->dax_supported) > - ret = dax_dev->ops->dax_supported(dax_dev, bdev, blocksize, > - start, len); > - dax_read_unlock(id); > - return ret; > -} > -EXPORT_SYMBOL_GPL(dax_supported); > #endif /* CONFIG_BLOCK && CONFIG_FS_DAX */ > > enum dax_device_flags { > diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c > index bcddc5effd155..f4915a7d5dc84 100644 > --- a/drivers/md/dm-table.c > +++ b/drivers/md/dm-table.c > @@ -806,12 +806,14 @@ void dm_table_set_type(struct dm_table *t, enum dm_queue_mode type) > EXPORT_SYMBOL_GPL(dm_table_set_type); > > /* validate the dax capability of the target device span */ > -int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev, > +static int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev, > sector_t start, sector_t len, void *data) > { > - int blocksize = *(int *) data; > + if (dev->dax_dev) > + return false; > > - return !dax_supported(dev->dax_dev, dev->bdev, blocksize, start, len); > + DMDEBUG("%pg: error: dax unsupported by block device", dev->bdev); > + return true; > } > > /* Check devices support synchronous DAX */ > @@ -821,8 +823,8 @@ static int device_not_dax_synchronous_capable(struct dm_target *ti, struct dm_de > return !dev->dax_dev || !dax_synchronous(dev->dax_dev); > } > > -bool dm_table_supports_dax(struct dm_table *t, > - iterate_devices_callout_fn iterate_fn, int *blocksize) > +static bool dm_table_supports_dax(struct dm_table *t, > + iterate_devices_callout_fn iterate_fn) > { > struct dm_target *ti; > unsigned i; > @@ -835,7 +837,7 @@ bool dm_table_supports_dax(struct dm_table *t, > return false; > > if (!ti->type->iterate_devices || > - ti->type->iterate_devices(ti, iterate_fn, blocksize)) > + ti->type->iterate_devices(ti, iterate_fn, NULL)) > return false; > } > > @@ -862,7 +864,6 @@ static int dm_table_determine_type(struct dm_table *t) > struct dm_target *tgt; > struct list_head *devices = dm_table_get_devices(t); > enum dm_queue_mode live_md_type = dm_get_md_type(t->md); > - int page_size = PAGE_SIZE; > > if (t->type != DM_TYPE_NONE) { > /* target already set the table's type */ > @@ -906,7 +907,7 @@ static int dm_table_determine_type(struct dm_table *t) > verify_bio_based: > /* We must use this table as bio-based */ > t->type = DM_TYPE_BIO_BASED; > - if (dm_table_supports_dax(t, device_not_dax_capable, &page_size) || > + if (dm_table_supports_dax(t, device_not_dax_capable) || > (list_empty(devices) && live_md_type == DM_TYPE_DAX_BIO_BASED)) { > t->type = DM_TYPE_DAX_BIO_BASED; > } > @@ -1976,7 +1977,6 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, > struct queue_limits *limits) > { > bool wc = false, fua = false; > - int page_size = PAGE_SIZE; > int r; > > /* > @@ -2010,9 +2010,9 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, > } > blk_queue_write_cache(q, wc, fua); > > - if (dm_table_supports_dax(t, device_not_dax_capable, &page_size)) { > + if (dm_table_supports_dax(t, device_not_dax_capable)) { > blk_queue_flag_set(QUEUE_FLAG_DAX, q); > - if (dm_table_supports_dax(t, device_not_dax_synchronous_capable, NULL)) > + if (dm_table_supports_dax(t, device_not_dax_synchronous_capable)) > set_dax_synchronous(t->md->dax_dev); > } > else > diff --git a/drivers/md/dm.c b/drivers/md/dm.c > index 782a076f61f81..282008afc465f 100644 > --- a/drivers/md/dm.c > +++ b/drivers/md/dm.c > @@ -1027,26 +1027,6 @@ static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, > return ret; > } > > -static bool dm_dax_supported(struct dax_device *dax_dev, struct block_device *bdev, > - int blocksize, sector_t start, sector_t len) > -{ > - struct mapped_device *md = dax_get_private(dax_dev); > - struct dm_table *map; > - bool ret = false; > - int srcu_idx; > - > - map = dm_get_live_table(md, &srcu_idx); > - if (!map) > - goto out; > - > - ret = dm_table_supports_dax(map, device_not_dax_capable, &blocksize); > - > -out: > - dm_put_live_table(md, srcu_idx); > - > - return ret; > -} > - > static size_t dm_dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, > void *addr, size_t bytes, struct iov_iter *i) > { > @@ -3052,7 +3032,6 @@ static const struct block_device_operations dm_rq_blk_dops = { > > static const struct dax_operations dm_dax_ops = { > .direct_access = dm_dax_direct_access, > - .dax_supported = dm_dax_supported, > .copy_from_iter = dm_dax_copy_from_iter, > .copy_to_iter = dm_dax_copy_to_iter, > .zero_page_range = dm_dax_zero_page_range, > diff --git a/drivers/md/dm.h b/drivers/md/dm.h > index 742d9c80efe19..9013dc1a7b002 100644 > --- a/drivers/md/dm.h > +++ b/drivers/md/dm.h > @@ -73,10 +73,6 @@ bool dm_table_bio_based(struct dm_table *t); > bool dm_table_request_based(struct dm_table *t); > void dm_table_free_md_mempools(struct dm_table *t); > struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t); > -bool dm_table_supports_dax(struct dm_table *t, iterate_devices_callout_fn fn, > - int *blocksize); > -int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev, > - sector_t start, sector_t len, void *data); > > void dm_lock_md_type(struct mapped_device *md); > void dm_unlock_md_type(struct mapped_device *md); > diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c > index 8783ad7370856..0d66339875523 100644 > --- a/drivers/nvdimm/pmem.c > +++ b/drivers/nvdimm/pmem.c > @@ -321,7 +321,6 @@ static size_t pmem_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, > > static const struct dax_operations pmem_dax_ops = { > .direct_access = pmem_dax_direct_access, > - .dax_supported = generic_fsdax_supported, > .copy_from_iter = pmem_copy_from_iter, > .copy_to_iter = pmem_copy_to_iter, > .zero_page_range = pmem_dax_zero_page_range, > diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c > index 657e492f2bc26..e65e83764d1ce 100644 > --- a/drivers/s390/block/dcssblk.c > +++ b/drivers/s390/block/dcssblk.c > @@ -72,7 +72,6 @@ static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, > > static const struct dax_operations dcssblk_dax_ops = { > .direct_access = dcssblk_dax_direct_access, > - .dax_supported = generic_fsdax_supported, > .copy_from_iter = dcssblk_dax_copy_from_iter, > .copy_to_iter = dcssblk_dax_copy_to_iter, > .zero_page_range = dcssblk_dax_zero_page_range, > diff --git a/fs/erofs/super.c b/fs/erofs/super.c > index 6a969b1e0ee6b..0aed886473c8d 100644 > --- a/fs/erofs/super.c > +++ b/fs/erofs/super.c > @@ -652,10 +652,13 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc) > if (err) > return err; > > - if (test_opt(&sbi->opt, DAX_ALWAYS) && > - !dax_supported(sbi->dax_dev, sb->s_bdev, EROFS_BLKSIZ, 0, bdev_nr_sectors(sb->s_bdev))) { > - errorfc(fc, "DAX unsupported by block device. Turning off DAX."); > - clear_opt(&sbi->opt, DAX_ALWAYS); > + if (test_opt(&sbi->opt, DAX_ALWAYS)) { > + BUILD_BUG_ON(EROFS_BLKSIZ != PAGE_SIZE); > + > + if (!sbi->dax_dev) { > + errorfc(fc, "DAX unsupported by block device. Turning off DAX."); > + clear_opt(&sbi->opt, DAX_ALWAYS); > + } > } > sb->s_flags |= SB_RDONLY | SB_NOATIME; > sb->s_maxbytes = MAX_LFS_FILESIZE; > diff --git a/fs/ext2/super.c b/fs/ext2/super.c > index d8d580b609baa..a964066a80aa7 100644 > --- a/fs/ext2/super.c > +++ b/fs/ext2/super.c > @@ -946,11 +946,13 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) > blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); > > if (test_opt(sb, DAX)) { > - if (!dax_supported(dax_dev, sb->s_bdev, blocksize, 0, > - bdev_nr_sectors(sb->s_bdev))) { > + if (!dax_dev) { > ext2_msg(sb, KERN_ERR, > "DAX unsupported by block device. Turning off DAX."); > clear_opt(sbi->s_mount_opt, DAX); > + } else if (blocksize != PAGE_SIZE) { > + ext2_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); Per Darrick, drop the '\n". > + clear_opt(sbi->s_mount_opt, DAX); > } > } > > diff --git a/fs/ext4/super.c b/fs/ext4/super.c > index a320c54202d95..eb4df43abd76e 100644 > --- a/fs/ext4/super.c > +++ b/fs/ext4/super.c > @@ -4300,9 +4300,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) > goto failed_mount; > } > > - if (dax_supported(dax_dev, sb->s_bdev, blocksize, 0, > - bdev_nr_sectors(sb->s_bdev))) > - set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); > + if (dax_dev) { > + if (blocksize == PAGE_SIZE) > + set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); > + else > + ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); ...another one. > + } > > if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { > if (ext4_has_feature_inline_data(sb)) { > diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c > index 875fd3151d6c9..3a45d5caa28d5 100644 > --- a/fs/xfs/xfs_super.c > +++ b/fs/xfs/xfs_super.c > @@ -331,28 +331,23 @@ xfs_set_inode_alloc( > return xfs_is_inode32(mp) ? maxagi : agcount; > } > > -static bool > -xfs_buftarg_is_dax( > - struct super_block *sb, > - struct xfs_buftarg *bt) > -{ > - return dax_supported(bt->bt_daxdev, bt->bt_bdev, sb->s_blocksize, 0, > - bdev_nr_sectors(bt->bt_bdev)); > -} > - > static int > xfs_setup_dax_always( > struct xfs_mount *mp) > { > - struct super_block *sb = mp->m_super; > - > - if (!xfs_buftarg_is_dax(sb, mp->m_ddev_targp) && > - (!mp->m_rtdev_targp || !xfs_buftarg_is_dax(sb, mp->m_rtdev_targp))) { > + if (!mp->m_ddev_targp->bt_daxdev && > + (!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) { > xfs_alert(mp, > "DAX unsupported by block device. Turning off DAX."); > goto disable_dax; > } > > + if (mp->m_super->s_blocksize != PAGE_SIZE) { > + xfs_alert(mp, > + "DAX not supported for blocksize. Turning off DAX.\n"); ...and one more > + goto disable_dax; > + } > + > if (xfs_has_reflink(mp)) { > xfs_alert(mp, "DAX and reflink cannot be used together!"); > return -EINVAL; > diff --git a/include/linux/dax.h b/include/linux/dax.h > index e2e9a67004cbd..439c3c70e347b 100644 > --- a/include/linux/dax.h > +++ b/include/linux/dax.h > @@ -111,12 +111,6 @@ int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff); > #if IS_ENABLED(CONFIG_FS_DAX) > int dax_add_host(struct dax_device *dax_dev, struct gendisk *disk); > void dax_remove_host(struct gendisk *disk); > -bool generic_fsdax_supported(struct dax_device *dax_dev, > - struct block_device *bdev, int blocksize, sector_t start, > - sector_t sectors); > - > -bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev, > - int blocksize, sector_t start, sector_t len); > > static inline void fs_put_dax(struct dax_device *dax_dev) > { > @@ -139,14 +133,6 @@ static inline int dax_add_host(struct dax_device *dax_dev, struct gendisk *disk) > static inline void dax_remove_host(struct gendisk *disk) > { > } > -#define generic_fsdax_supported NULL > - > -static inline bool dax_supported(struct dax_device *dax_dev, > - struct block_device *bdev, int blocksize, sector_t start, > - sector_t len) > -{ > - return false; > -} > > static inline void fs_put_dax(struct dax_device *dax_dev) > { > -- > 2.30.2 >
