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| author | Dan Williams <dan.j.williams@intel.com> | 2017-04-01 16:02:38 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-04-25 13:20:46 -0700 |
| commit | 2093f2e9dfec98e561c83e807910267bcbd8bb7b (patch) | |
| tree | b04c6a55b94f879f66914851aabeb4b10dc513c3 | |
| parent | cccbce67158290537cc671cbd4c1564876485a65 (diff) | |
| download | linux-2093f2e9dfec98e561c83e807910267bcbd8bb7b.tar.bz2 | |
block, dax: convert bdev_dax_supported() to dax_direct_access()
Kill of the final user of bdev_direct_access() and struct blk_dax_ctl.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| -rw-r--r-- | fs/block_dev.c | 48 |
1 files changed, 28 insertions, 20 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 2f7885712575..ecbdc8f9f718 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -788,35 +788,43 @@ EXPORT_SYMBOL(bdev_dax_pgoff); */ int bdev_dax_supported(struct super_block *sb, int blocksize) { - struct blk_dax_ctl dax = { - .sector = 0, - .size = PAGE_SIZE, - }; - int err; + struct block_device *bdev = sb->s_bdev; + struct dax_device *dax_dev; + pgoff_t pgoff; + int err, id; + void *kaddr; + pfn_t pfn; + long len; if (blocksize != PAGE_SIZE) { vfs_msg(sb, KERN_ERR, "error: unsupported blocksize for dax"); return -EINVAL; } - err = bdev_direct_access(sb->s_bdev, &dax); - if (err < 0) { - switch (err) { - case -EOPNOTSUPP: - vfs_msg(sb, KERN_ERR, - "error: device does not support dax"); - break; - case -EINVAL: - vfs_msg(sb, KERN_ERR, - "error: unaligned partition for dax"); - break; - default: - vfs_msg(sb, KERN_ERR, - "error: dax access failed (%d)", err); - } + err = bdev_dax_pgoff(bdev, 0, PAGE_SIZE, &pgoff); + if (err) { + vfs_msg(sb, KERN_ERR, "error: unaligned partition for dax"); return err; } + dax_dev = dax_get_by_host(bdev->bd_disk->disk_name); + if (!dax_dev) { + vfs_msg(sb, KERN_ERR, "error: device does not support dax"); + return -EOPNOTSUPP; + } + + id = dax_read_lock(); + len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn); + dax_read_unlock(id); + + put_dax(dax_dev); + + if (len < 1) { + vfs_msg(sb, KERN_ERR, + "error: dax access failed (%d)", len); + return len < 0 ? len : -EIO; + } + return 0; } EXPORT_SYMBOL_GPL(bdev_dax_supported); |