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nfs: port block device access to files 

Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-24-adbd023e19cc@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-01-23 14:26:41 +01:00
parent ac4e78bdbb
commit 4b2cfbda2d
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
2 changed files with 34 additions and 34 deletions
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2
fs/nfs/blocklayout/blocklayout.h
View File

@ -108,7 +108,7 @@ struct pnfs_block_dev {
struct pnfs_block_dev *children;
u64 chunk_size;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
u64 disk_offset;
u64 pr_key;

66
fs/nfs/blocklayout/dev.c
View File

@ -25,17 +25,17 @@ bl_free_device(struct pnfs_block_dev *dev)
} else {
if (dev->pr_registered) {
const struct pr_ops *ops =
dev->bdev_handle->bdev->bd_disk->fops->pr_ops;
file_bdev(dev->bdev_file)->bd_disk->fops->pr_ops;
int error;
error = ops->pr_register(dev->bdev_handle->bdev,
error = ops->pr_register(file_bdev(dev->bdev_file),
dev->pr_key, 0, false);
if (error)
pr_err("failed to unregister PR key.\n");
}
if (dev->bdev_handle)
bdev_release(dev->bdev_handle);
if (dev->bdev_file)
fput(dev->bdev_file);
}
}
@ -169,7 +169,7 @@ static bool bl_map_simple(struct pnfs_block_dev *dev, u64 offset,
map->start = dev->start;
map->len = dev->len;
map->disk_offset = dev->disk_offset;
map->bdev = dev->bdev_handle->bdev;
map->bdev = file_bdev(dev->bdev_file);
return true;
}
@ -236,26 +236,26 @@ bl_parse_simple(struct nfs_server *server, struct pnfs_block_dev *d,
struct pnfs_block_volume *volumes, int idx, gfp_t gfp_mask)
{
struct pnfs_block_volume *v = &volumes[idx];
struct bdev_handle *bdev_handle;
struct file *bdev_file;
dev_t dev;
dev = bl_resolve_deviceid(server, v, gfp_mask);
if (!dev)
return -EIO;
bdev_handle = bdev_open_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE,
bdev_file = bdev_file_open_by_dev(dev, BLK_OPEN_READ | BLK_OPEN_WRITE,
NULL, NULL);
if (IS_ERR(bdev_handle)) {
if (IS_ERR(bdev_file)) {
printk(KERN_WARNING "pNFS: failed to open device %d:%d (%ld)\n",
MAJOR(dev), MINOR(dev), PTR_ERR(bdev_handle));
return PTR_ERR(bdev_handle);
MAJOR(dev), MINOR(dev), PTR_ERR(bdev_file));
return PTR_ERR(bdev_file);
}
d->bdev_handle = bdev_handle;
d->len = bdev_nr_bytes(bdev_handle->bdev);
d->bdev_file = bdev_file;
d->len = bdev_nr_bytes(file_bdev(bdev_file));
d->map = bl_map_simple;
printk(KERN_INFO "pNFS: using block device %s\n",
bdev_handle->bdev->bd_disk->disk_name);
file_bdev(bdev_file)->bd_disk->disk_name);
return 0;
}
@ -300,10 +300,10 @@ bl_validate_designator(struct pnfs_block_volume *v)
}
}
static struct bdev_handle *
static struct file *
bl_open_path(struct pnfs_block_volume *v, const char *prefix)
{
struct bdev_handle *bdev_handle;
struct file *bdev_file;
const char *devname;
devname = kasprintf(GFP_KERNEL, "/dev/disk/by-id/%s%*phN",
@ -311,15 +311,15 @@ bl_open_path(struct pnfs_block_volume *v, const char *prefix)
if (!devname)
return ERR_PTR(-ENOMEM);
bdev_handle = bdev_open_by_path(devname, BLK_OPEN_READ | BLK_OPEN_WRITE,
bdev_file = bdev_file_open_by_path(devname, BLK_OPEN_READ | BLK_OPEN_WRITE,
NULL, NULL);
if (IS_ERR(bdev_handle)) {
if (IS_ERR(bdev_file)) {
pr_warn("pNFS: failed to open device %s (%ld)\n",
devname, PTR_ERR(bdev_handle));
devname, PTR_ERR(bdev_file));
}
kfree(devname);
return bdev_handle;
return bdev_file;
}
static int
@ -327,7 +327,7 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d,
struct pnfs_block_volume *volumes, int idx, gfp_t gfp_mask)
{
struct pnfs_block_volume *v = &volumes[idx];
struct bdev_handle *bdev_handle;
struct file *bdev_file;
const struct pr_ops *ops;
int error;
@ -340,14 +340,14 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d,
* On other distributions like Debian, the default SCSI by-id path will
* point to the dm-multipath device if one exists.
*/
bdev_handle = bl_open_path(v, "dm-uuid-mpath-0x");
if (IS_ERR(bdev_handle))
bdev_handle = bl_open_path(v, "wwn-0x");
if (IS_ERR(bdev_handle))
return PTR_ERR(bdev_handle);
d->bdev_handle = bdev_handle;
bdev_file = bl_open_path(v, "dm-uuid-mpath-0x");
if (IS_ERR(bdev_file))
bdev_file = bl_open_path(v, "wwn-0x");
if (IS_ERR(bdev_file))
return PTR_ERR(bdev_file);
d->bdev_file = bdev_file;
d->len = bdev_nr_bytes(d->bdev_handle->bdev);
d->len = bdev_nr_bytes(file_bdev(d->bdev_file));
d->map = bl_map_simple;
d->pr_key = v->scsi.pr_key;
@ -355,20 +355,20 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d,
return -ENODEV;
pr_info("pNFS: using block device %s (reservation key 0x%llx)\n",
d->bdev_handle->bdev->bd_disk->disk_name, d->pr_key);
file_bdev(d->bdev_file)->bd_disk->disk_name, d->pr_key);
ops = d->bdev_handle->bdev->bd_disk->fops->pr_ops;
ops = file_bdev(d->bdev_file)->bd_disk->fops->pr_ops;
if (!ops) {
pr_err("pNFS: block device %s does not support reservations.",
d->bdev_handle->bdev->bd_disk->disk_name);
file_bdev(d->bdev_file)->bd_disk->disk_name);
error = -EINVAL;
goto out_blkdev_put;
}
error = ops->pr_register(d->bdev_handle->bdev, 0, d->pr_key, true);
error = ops->pr_register(file_bdev(d->bdev_file), 0, d->pr_key, true);
if (error) {
pr_err("pNFS: failed to register key for block device %s.",
d->bdev_handle->bdev->bd_disk->disk_name);
file_bdev(d->bdev_file)->bd_disk->disk_name);
goto out_blkdev_put;
}
@ -376,7 +376,7 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d,
return 0;
out_blkdev_put:
bdev_release(d->bdev_handle);
fput(d->bdev_file);
return error;
}