[vfs.all,19/26] dm-vdo: convert to use bdev_file

Message ID	20240406090930.2252838-20-yukuai1@huaweicloud.com (mailing list archive)
State	New
Headers	show Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EAA6F376EB; Sat, 6 Apr 2024 09:17:52 +0000 (UTC) From: Yu Kuai <yukuai1@huaweicloud.com> To: jack@suse.cz, hch@lst.de, brauner@kernel.org, viro@zeniv.linux.org.uk, axboe@kernel.dk Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, yi.zhang@huawei.com, yangerkun@huawei.com, yukuai3@huawei.com Subject: [PATCH vfs.all 19/26] dm-vdo: convert to use bdev_file Date: Sat, 6 Apr 2024 17:09:23 +0800 Message-Id: <20240406090930.2252838-20-yukuai1@huaweicloud.com> In-Reply-To: <20240406090930.2252838-1-yukuai1@huaweicloud.com> References: <20240406090930.2252838-1-yukuai1@huaweicloud.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	fs & block: remove bdev->bd_inode \| expand [vfs.all,00/26] fs & block: remove bdev->bd_inode [vfs.all,01/26] block: move two helpers into bdev.c [vfs.all,02/26] block: remove sync_blockdev_nowait() [vfs.all,03/26] block: remove sync_blockdev_range() [vfs.all,04/26] block: prevent direct access of bd_inode [vfs.all,05/26] block: add a helper bdev_read_folio() [vfs.all,06/26] bcachefs: remove dead function bdev_sectors() [vfs.all,07/26] cramfs: prevent direct access of bd_inode [vfs.all,08/26] erofs: prevent direct access of bd_inode [vfs.all,09/26] nilfs2: prevent direct access of bd_inode [vfs.all,10/26] gfs2: prevent direct access of bd_inode [vfs.all,11/26] btrfs: prevent direct access of bd_inode [vfs.all,12/26] ext4: remove block_device_ejected() [vfs.all,13/26] ext4: prevent direct access of bd_inode [vfs.all,14/26] jbd2: prevent direct access of bd_inode [vfs.all,15/26] s390/dasd: use bdev api in dasd_format() [vfs.all,16/26] bcache: prevent direct access of bd_inode [vfs.all,17/26] block2mtd: prevent direct access of bd_inode [vfs.all,18/26] scsi: use bdev helper in scsi_bios_ptable() [vfs.all,19/26] dm-vdo: convert to use bdev_file [vfs.all,20/26] block: factor out a helper init_bdev_file() [vfs.all,21/26] block: fix module reference leakage from bdev_open_by_dev error path [vfs.all,22/26] block: stash a bdev_file to read/write raw blcok_device [vfs.all,23/26] iomap: add helpers helpers to get and set bdev [vfs.all,24/26] iomap: convert to use bdev_file [vfs.all,25/26] buffer: add helpers to get and set bdev [vfs.all,26/26] buffer: convert to use bdev_file

Yu Kuai April 6, 2024, 9:09 a.m. UTC

From: Yu Kuai <yukuai3@huawei.com>

Now that dm upper layer already statsh the file of opened device in
'dm_dev->bdev_file', it's ok to get inode from the file.

There are no functional changes, prepare to remove 'bd_inode' from
block_device.

Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 drivers/md/dm-vdo/dedupe.c                |  7 ++++---
 drivers/md/dm-vdo/dm-vdo-target.c         |  9 +++++++--
 drivers/md/dm-vdo/indexer/config.c        |  2 +-
 drivers/md/dm-vdo/indexer/config.h        |  4 ++--
 drivers/md/dm-vdo/indexer/index-layout.c  |  6 +++---
 drivers/md/dm-vdo/indexer/index-layout.h  |  2 +-
 drivers/md/dm-vdo/indexer/index-session.c | 18 ++++++++++--------
 drivers/md/dm-vdo/indexer/index.c         |  4 ++--
 drivers/md/dm-vdo/indexer/index.h         |  2 +-
 drivers/md/dm-vdo/indexer/indexer.h       |  6 +++---
 drivers/md/dm-vdo/indexer/io-factory.c    | 17 +++++++++--------
 drivers/md/dm-vdo/indexer/io-factory.h    |  4 ++--
 drivers/md/dm-vdo/indexer/volume.c        |  4 ++--
 drivers/md/dm-vdo/indexer/volume.h        |  2 +-
 drivers/md/dm-vdo/vdo.c                   |  2 +-
 15 files changed, 49 insertions(+), 40 deletions(-)

Jan Kara April 10, 2024, 10:56 a.m. UTC | #1

On Sat 06-04-24 17:09:23, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@huawei.com>
> 
> Now that dm upper layer already statsh the file of opened device in
> 'dm_dev->bdev_file', it's ok to get inode from the file.
> 
> There are no functional changes, prepare to remove 'bd_inode' from
> block_device.
> 
> Suggested-by: Jan Kara <jack@suse.cz>
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@suse.cz>

								Honza

> ---
>  drivers/md/dm-vdo/dedupe.c                |  7 ++++---
>  drivers/md/dm-vdo/dm-vdo-target.c         |  9 +++++++--
>  drivers/md/dm-vdo/indexer/config.c        |  2 +-
>  drivers/md/dm-vdo/indexer/config.h        |  4 ++--
>  drivers/md/dm-vdo/indexer/index-layout.c  |  6 +++---
>  drivers/md/dm-vdo/indexer/index-layout.h  |  2 +-
>  drivers/md/dm-vdo/indexer/index-session.c | 18 ++++++++++--------
>  drivers/md/dm-vdo/indexer/index.c         |  4 ++--
>  drivers/md/dm-vdo/indexer/index.h         |  2 +-
>  drivers/md/dm-vdo/indexer/indexer.h       |  6 +++---
>  drivers/md/dm-vdo/indexer/io-factory.c    | 17 +++++++++--------
>  drivers/md/dm-vdo/indexer/io-factory.h    |  4 ++--
>  drivers/md/dm-vdo/indexer/volume.c        |  4 ++--
>  drivers/md/dm-vdo/indexer/volume.h        |  2 +-
>  drivers/md/dm-vdo/vdo.c                   |  2 +-
>  15 files changed, 49 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/md/dm-vdo/dedupe.c b/drivers/md/dm-vdo/dedupe.c
> index 117266e1b3ae..0e311989247e 100644
> --- a/drivers/md/dm-vdo/dedupe.c
> +++ b/drivers/md/dm-vdo/dedupe.c
> @@ -2191,7 +2191,7 @@ static int initialize_index(struct vdo *vdo, struct hash_zones *zones)
>  	uds_offset = ((vdo_get_index_region_start(geometry) -
>  		       geometry.bio_offset) * VDO_BLOCK_SIZE);
>  	zones->parameters = (struct uds_parameters) {
> -		.bdev = vdo->device_config->owned_device->bdev,
> +		.bdev_file = vdo->device_config->owned_device->bdev_file,
>  		.offset = uds_offset,
>  		.size = (vdo_get_index_region_size(geometry) * VDO_BLOCK_SIZE),
>  		.memory_size = geometry.index_config.mem,
> @@ -2582,8 +2582,9 @@ static void resume_index(void *context, struct vdo_completion *parent)
>  	struct device_config *config = parent->vdo->device_config;
>  	int result;
>  
> -	zones->parameters.bdev = config->owned_device->bdev;
> -	result = uds_resume_index_session(zones->index_session, zones->parameters.bdev);
> +	zones->parameters.bdev_file = config->owned_device->bdev_file;
> +	result = uds_resume_index_session(zones->index_session,
> +					  zones->parameters.bdev_file);
>  	if (result != UDS_SUCCESS)
>  		vdo_log_error_strerror(result, "Error resuming dedupe index");
>  
> diff --git a/drivers/md/dm-vdo/dm-vdo-target.c b/drivers/md/dm-vdo/dm-vdo-target.c
> index 5a4b0a927f56..79e861c2887c 100644
> --- a/drivers/md/dm-vdo/dm-vdo-target.c
> +++ b/drivers/md/dm-vdo/dm-vdo-target.c
> @@ -696,6 +696,11 @@ static void handle_parse_error(struct device_config *config, char **error_ptr,
>  	*error_ptr = error_str;
>  }
>  
> +static loff_t vdo_get_device_size(const struct device_config *config)
> +{
> +	return i_size_read(file_inode(config->owned_device->bdev_file));
> +}
> +
>  /**
>   * parse_device_config() - Convert the dmsetup table into a struct device_config.
>   * @argc: The number of table values.
> @@ -878,7 +883,7 @@ static int parse_device_config(int argc, char **argv, struct dm_target *ti,
>  	}
>  
>  	if (config->version == 0) {
> -		u64 device_size = i_size_read(config->owned_device->bdev->bd_inode);
> +		u64 device_size = vdo_get_device_size(config);
>  
>  		config->physical_blocks = device_size / VDO_BLOCK_SIZE;
>  	}
> @@ -1011,7 +1016,7 @@ static void vdo_status(struct dm_target *ti, status_type_t status_type,
>  
>  static block_count_t __must_check get_underlying_device_block_count(const struct vdo *vdo)
>  {
> -	return i_size_read(vdo_get_backing_device(vdo)->bd_inode) / VDO_BLOCK_SIZE;
> +	return vdo_get_device_size(vdo->device_config) / VDO_BLOCK_SIZE;
>  }
>  
>  static int __must_check process_vdo_message_locked(struct vdo *vdo, unsigned int argc,
> diff --git a/drivers/md/dm-vdo/indexer/config.c b/drivers/md/dm-vdo/indexer/config.c
> index 5532371b952f..dcf0742a6145 100644
> --- a/drivers/md/dm-vdo/indexer/config.c
> +++ b/drivers/md/dm-vdo/indexer/config.c
> @@ -344,7 +344,7 @@ int uds_make_configuration(const struct uds_parameters *params,
>  	config->volume_index_mean_delta = DEFAULT_VOLUME_INDEX_MEAN_DELTA;
>  	config->sparse_sample_rate = (params->sparse ? DEFAULT_SPARSE_SAMPLE_RATE : 0);
>  	config->nonce = params->nonce;
> -	config->bdev = params->bdev;
> +	config->bdev_file = params->bdev_file;
>  	config->offset = params->offset;
>  	config->size = params->size;
>  
> diff --git a/drivers/md/dm-vdo/indexer/config.h b/drivers/md/dm-vdo/indexer/config.h
> index 08507dc2f7a1..8ba0cf72dec9 100644
> --- a/drivers/md/dm-vdo/indexer/config.h
> +++ b/drivers/md/dm-vdo/indexer/config.h
> @@ -25,8 +25,8 @@ enum {
>  
>  /* A set of configuration parameters for the indexer. */
>  struct uds_configuration {
> -	/* Storage device for the index */
> -	struct block_device *bdev;
> +	/* File of opened storage device for the index */
> +	struct file *bdev_file;
>  
>  	/* The maximum allowable size of the index */
>  	size_t size;
> diff --git a/drivers/md/dm-vdo/indexer/index-layout.c b/drivers/md/dm-vdo/indexer/index-layout.c
> index 627adc24af3b..32eee76bc246 100644
> --- a/drivers/md/dm-vdo/indexer/index-layout.c
> +++ b/drivers/md/dm-vdo/indexer/index-layout.c
> @@ -1668,7 +1668,7 @@ static int create_layout_factory(struct index_layout *layout,
>  	size_t writable_size;
>  	struct io_factory *factory = NULL;
>  
> -	result = uds_make_io_factory(config->bdev, &factory);
> +	result = uds_make_io_factory(config->bdev_file, &factory);
>  	if (result != UDS_SUCCESS)
>  		return result;
>  
> @@ -1741,9 +1741,9 @@ void uds_free_index_layout(struct index_layout *layout)
>  }
>  
>  int uds_replace_index_layout_storage(struct index_layout *layout,
> -				     struct block_device *bdev)
> +				     struct file *bdev_file)
>  {
> -	return uds_replace_storage(layout->factory, bdev);
> +	return uds_replace_storage(layout->factory, bdev_file);
>  }
>  
>  /* Obtain a dm_bufio_client for the volume region. */
> diff --git a/drivers/md/dm-vdo/indexer/index-layout.h b/drivers/md/dm-vdo/indexer/index-layout.h
> index e9ac6f4302d6..28f9be577631 100644
> --- a/drivers/md/dm-vdo/indexer/index-layout.h
> +++ b/drivers/md/dm-vdo/indexer/index-layout.h
> @@ -24,7 +24,7 @@ int __must_check uds_make_index_layout(struct uds_configuration *config, bool ne
>  void uds_free_index_layout(struct index_layout *layout);
>  
>  int __must_check uds_replace_index_layout_storage(struct index_layout *layout,
> -						  struct block_device *bdev);
> +						  struct file *bdev_file);
>  
>  int __must_check uds_load_index_state(struct index_layout *layout,
>  				      struct uds_index *index);
> diff --git a/drivers/md/dm-vdo/indexer/index-session.c b/drivers/md/dm-vdo/indexer/index-session.c
> index aee0914d604a..914abf5e006b 100644
> --- a/drivers/md/dm-vdo/indexer/index-session.c
> +++ b/drivers/md/dm-vdo/indexer/index-session.c
> @@ -335,7 +335,7 @@ int uds_open_index(enum uds_open_index_type open_type,
>  		vdo_log_error("missing required parameters");
>  		return -EINVAL;
>  	}
> -	if (parameters->bdev == NULL) {
> +	if (parameters->bdev_file == NULL) {
>  		vdo_log_error("missing required block device");
>  		return -EINVAL;
>  	}
> @@ -349,7 +349,7 @@ int uds_open_index(enum uds_open_index_type open_type,
>  		return uds_status_to_errno(result);
>  
>  	session->parameters = *parameters;
> -	format_dev_t(name, parameters->bdev->bd_dev);
> +	format_dev_t(name, file_bdev(parameters->bdev_file)->bd_dev);
>  	vdo_log_info("%s: %s", get_open_type_string(open_type), name);
>  
>  	result = initialize_index_session(session, open_type);
> @@ -460,15 +460,16 @@ int uds_suspend_index_session(struct uds_index_session *session, bool save)
>  	return uds_status_to_errno(result);
>  }
>  
> -static int replace_device(struct uds_index_session *session, struct block_device *bdev)
> +static int replace_device(struct uds_index_session *session,
> +			  struct file *bdev_file)
>  {
>  	int result;
>  
> -	result = uds_replace_index_storage(session->index, bdev);
> +	result = uds_replace_index_storage(session->index, bdev_file);
>  	if (result != UDS_SUCCESS)
>  		return result;
>  
> -	session->parameters.bdev = bdev;
> +	session->parameters.bdev_file = bdev_file;
>  	return UDS_SUCCESS;
>  }
>  
> @@ -477,7 +478,7 @@ static int replace_device(struct uds_index_session *session, struct block_device
>   * device differs from the current backing store, the index will start using the new backing store.
>   */
>  int uds_resume_index_session(struct uds_index_session *session,
> -			     struct block_device *bdev)
> +			     struct file *bdev_file)
>  {
>  	int result = UDS_SUCCESS;
>  	bool no_work = false;
> @@ -502,8 +503,9 @@ int uds_resume_index_session(struct uds_index_session *session,
>  	if (no_work)
>  		return result;
>  
> -	if ((session->index != NULL) && (bdev != session->parameters.bdev)) {
> -		result = replace_device(session, bdev);
> +	if (session->index != NULL &&
> +	    bdev_file != session->parameters.bdev_file) {
> +		result = replace_device(session, bdev_file);
>  		if (result != UDS_SUCCESS) {
>  			mutex_lock(&session->request_mutex);
>  			session->state &= ~IS_FLAG_WAITING;
> diff --git a/drivers/md/dm-vdo/indexer/index.c b/drivers/md/dm-vdo/indexer/index.c
> index 1ba767144426..48b16275a067 100644
> --- a/drivers/md/dm-vdo/indexer/index.c
> +++ b/drivers/md/dm-vdo/indexer/index.c
> @@ -1336,9 +1336,9 @@ int uds_save_index(struct uds_index *index)
>  	return result;
>  }
>  
> -int uds_replace_index_storage(struct uds_index *index, struct block_device *bdev)
> +int uds_replace_index_storage(struct uds_index *index, struct file *bdev_file)
>  {
> -	return uds_replace_volume_storage(index->volume, index->layout, bdev);
> +	return uds_replace_volume_storage(index->volume, index->layout, bdev_file);
>  }
>  
>  /* Accessing statistics should be safe from any thread. */
> diff --git a/drivers/md/dm-vdo/indexer/index.h b/drivers/md/dm-vdo/indexer/index.h
> index edabb239548e..6e2e203f43f7 100644
> --- a/drivers/md/dm-vdo/indexer/index.h
> +++ b/drivers/md/dm-vdo/indexer/index.h
> @@ -72,7 +72,7 @@ int __must_check uds_save_index(struct uds_index *index);
>  void uds_free_index(struct uds_index *index);
>  
>  int __must_check uds_replace_index_storage(struct uds_index *index,
> -					   struct block_device *bdev);
> +					   struct file *bdev_file);
>  
>  void uds_get_index_stats(struct uds_index *index, struct uds_index_stats *counters);
>  
> diff --git a/drivers/md/dm-vdo/indexer/indexer.h b/drivers/md/dm-vdo/indexer/indexer.h
> index 3744aaf625b0..246ff2810e01 100644
> --- a/drivers/md/dm-vdo/indexer/indexer.h
> +++ b/drivers/md/dm-vdo/indexer/indexer.h
> @@ -128,8 +128,8 @@ struct uds_volume_record {
>  };
>  
>  struct uds_parameters {
> -	/* The block_device used for storage */
> -	struct block_device *bdev;
> +	/* The bdev_file used for storage */
> +	struct file *bdev_file;
>  	/* The maximum allowable size of the index on storage */
>  	size_t size;
>  	/* The offset where the index should start */
> @@ -314,7 +314,7 @@ int __must_check uds_suspend_index_session(struct uds_index_session *session, bo
>   * start using the new backing store instead.
>   */
>  int __must_check uds_resume_index_session(struct uds_index_session *session,
> -					  struct block_device *bdev);
> +					  struct file *bdev_file);
>  
>  /* Wait until all outstanding index operations are complete. */
>  int __must_check uds_flush_index_session(struct uds_index_session *session);
> diff --git a/drivers/md/dm-vdo/indexer/io-factory.c b/drivers/md/dm-vdo/indexer/io-factory.c
> index 515765d35794..f4dedb7b7f40 100644
> --- a/drivers/md/dm-vdo/indexer/io-factory.c
> +++ b/drivers/md/dm-vdo/indexer/io-factory.c
> @@ -22,7 +22,7 @@
>   * make helper structures that can be used to access sections of the index.
>   */
>  struct io_factory {
> -	struct block_device *bdev;
> +	struct file *bdev_file;
>  	atomic_t ref_count;
>  };
>  
> @@ -59,7 +59,7 @@ static void uds_get_io_factory(struct io_factory *factory)
>  	atomic_inc(&factory->ref_count);
>  }
>  
> -int uds_make_io_factory(struct block_device *bdev, struct io_factory **factory_ptr)
> +int uds_make_io_factory(struct file *bdev_file, struct io_factory **factory_ptr)
>  {
>  	int result;
>  	struct io_factory *factory;
> @@ -68,16 +68,16 @@ int uds_make_io_factory(struct block_device *bdev, struct io_factory **factory_p
>  	if (result != VDO_SUCCESS)
>  		return result;
>  
> -	factory->bdev = bdev;
> +	factory->bdev_file = bdev_file;
>  	atomic_set_release(&factory->ref_count, 1);
>  
>  	*factory_ptr = factory;
>  	return UDS_SUCCESS;
>  }
>  
> -int uds_replace_storage(struct io_factory *factory, struct block_device *bdev)
> +int uds_replace_storage(struct io_factory *factory, struct file *bdev_file)
>  {
> -	factory->bdev = bdev;
> +	factory->bdev_file = bdev_file;
>  	return UDS_SUCCESS;
>  }
>  
> @@ -90,7 +90,7 @@ void uds_put_io_factory(struct io_factory *factory)
>  
>  size_t uds_get_writable_size(struct io_factory *factory)
>  {
> -	return i_size_read(factory->bdev->bd_inode);
> +	return i_size_read(file_inode(factory->bdev_file));
>  }
>  
>  /* Create a struct dm_bufio_client for an index region starting at offset. */
> @@ -99,8 +99,9 @@ int uds_make_bufio(struct io_factory *factory, off_t block_offset, size_t block_
>  {
>  	struct dm_bufio_client *client;
>  
> -	client = dm_bufio_client_create(factory->bdev, block_size, reserved_buffers, 0,
> -					NULL, NULL, 0);
> +	client = dm_bufio_client_create(file_bdev(factory->bdev_file),
> +					block_size, reserved_buffers,
> +					0, NULL, NULL, 0);
>  	if (IS_ERR(client))
>  		return -PTR_ERR(client);
>  
> diff --git a/drivers/md/dm-vdo/indexer/io-factory.h b/drivers/md/dm-vdo/indexer/io-factory.h
> index 7fb5a0616a79..a3ca84d62f2d 100644
> --- a/drivers/md/dm-vdo/indexer/io-factory.h
> +++ b/drivers/md/dm-vdo/indexer/io-factory.h
> @@ -24,11 +24,11 @@ enum {
>  	SECTORS_PER_BLOCK = UDS_BLOCK_SIZE >> SECTOR_SHIFT,
>  };
>  
> -int __must_check uds_make_io_factory(struct block_device *bdev,
> +int __must_check uds_make_io_factory(struct file *bdev_file,
>  				     struct io_factory **factory_ptr);
>  
>  int __must_check uds_replace_storage(struct io_factory *factory,
> -				     struct block_device *bdev);
> +				     struct file *bdev_file);
>  
>  void uds_put_io_factory(struct io_factory *factory);
>  
> diff --git a/drivers/md/dm-vdo/indexer/volume.c b/drivers/md/dm-vdo/indexer/volume.c
> index 655453bb276b..edbe46252657 100644
> --- a/drivers/md/dm-vdo/indexer/volume.c
> +++ b/drivers/md/dm-vdo/indexer/volume.c
> @@ -1465,12 +1465,12 @@ int uds_find_volume_chapter_boundaries(struct volume *volume, u64 *lowest_vcn,
>  
>  int __must_check uds_replace_volume_storage(struct volume *volume,
>  					    struct index_layout *layout,
> -					    struct block_device *bdev)
> +					    struct file *bdev_file)
>  {
>  	int result;
>  	u32 i;
>  
> -	result = uds_replace_index_layout_storage(layout, bdev);
> +	result = uds_replace_index_layout_storage(layout, bdev_file);
>  	if (result != UDS_SUCCESS)
>  		return result;
>  
> diff --git a/drivers/md/dm-vdo/indexer/volume.h b/drivers/md/dm-vdo/indexer/volume.h
> index 8679a5e55347..1dc3561b8b43 100644
> --- a/drivers/md/dm-vdo/indexer/volume.h
> +++ b/drivers/md/dm-vdo/indexer/volume.h
> @@ -130,7 +130,7 @@ void uds_free_volume(struct volume *volume);
>  
>  int __must_check uds_replace_volume_storage(struct volume *volume,
>  					    struct index_layout *layout,
> -					    struct block_device *bdev);
> +					    struct file *bdev_file);
>  
>  int __must_check uds_find_volume_chapter_boundaries(struct volume *volume,
>  						    u64 *lowest_vcn, u64 *highest_vcn,
> diff --git a/drivers/md/dm-vdo/vdo.c b/drivers/md/dm-vdo/vdo.c
> index fff847767755..eca9f8b51535 100644
> --- a/drivers/md/dm-vdo/vdo.c
> +++ b/drivers/md/dm-vdo/vdo.c
> @@ -809,7 +809,7 @@ void vdo_load_super_block(struct vdo *vdo, struct vdo_completion *parent)
>   */
>  struct block_device *vdo_get_backing_device(const struct vdo *vdo)
>  {
> -	return vdo->device_config->owned_device->bdev;
> +	return file_bdev(vdo->device_config->owned_device->bdev_file);
>  }
>  
>  /**
> -- 
> 2.39.2
>

Matthew Sakai April 10, 2024, 5:26 p.m. UTC | #2

+dm-devel

On 4/6/24 05:09, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@huawei.com>
> 
> Now that dm upper layer already statsh the file of opened device in

                                  ^ stashes

> 'dm_dev->bdev_file', it's ok to get inode from the file.
> There are no functional changes, prepare to remove 'bd_inode' from
> block_device.
> 
> Suggested-by: Jan Kara <jack@suse.cz>
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
> ---
>   drivers/md/dm-vdo/dedupe.c                |  7 ++++---
>   drivers/md/dm-vdo/dm-vdo-target.c         |  9 +++++++--
>   drivers/md/dm-vdo/indexer/config.c        |  2 +-
>   drivers/md/dm-vdo/indexer/config.h        |  4 ++--
>   drivers/md/dm-vdo/indexer/index-layout.c  |  6 +++---
>   drivers/md/dm-vdo/indexer/index-layout.h  |  2 +-
>   drivers/md/dm-vdo/indexer/index-session.c | 18 ++++++++++--------
>   drivers/md/dm-vdo/indexer/index.c         |  4 ++--
>   drivers/md/dm-vdo/indexer/index.h         |  2 +-
>   drivers/md/dm-vdo/indexer/indexer.h       |  6 +++---
>   drivers/md/dm-vdo/indexer/io-factory.c    | 17 +++++++++--------
>   drivers/md/dm-vdo/indexer/io-factory.h    |  4 ++--
>   drivers/md/dm-vdo/indexer/volume.c        |  4 ++--
>   drivers/md/dm-vdo/indexer/volume.h        |  2 +-
>   drivers/md/dm-vdo/vdo.c                   |  2 +-
>   15 files changed, 49 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/md/dm-vdo/dedupe.c b/drivers/md/dm-vdo/dedupe.c
> index 117266e1b3ae..0e311989247e 100644
> --- a/drivers/md/dm-vdo/dedupe.c
> +++ b/drivers/md/dm-vdo/dedupe.c
> @@ -2191,7 +2191,7 @@ static int initialize_index(struct vdo *vdo, struct hash_zones *zones)
>   	uds_offset = ((vdo_get_index_region_start(geometry) -
>   		       geometry.bio_offset) * VDO_BLOCK_SIZE);
>   	zones->parameters = (struct uds_parameters) {
> -		.bdev = vdo->device_config->owned_device->bdev,
> +		.bdev_file = vdo->device_config->owned_device->bdev_file,
>   		.offset = uds_offset,
>   		.size = (vdo_get_index_region_size(geometry) * VDO_BLOCK_SIZE),
>   		.memory_size = geometry.index_config.mem,
> @@ -2582,8 +2582,9 @@ static void resume_index(void *context, struct vdo_completion *parent)
>   	struct device_config *config = parent->vdo->device_config;
>   	int result;
>   
> -	zones->parameters.bdev = config->owned_device->bdev;
> -	result = uds_resume_index_session(zones->index_session, zones->parameters.bdev);
> +	zones->parameters.bdev_file = config->owned_device->bdev_file;
> +	result = uds_resume_index_session(zones->index_session,
> +					  zones->parameters.bdev_file);
>   	if (result != UDS_SUCCESS)
>   		vdo_log_error_strerror(result, "Error resuming dedupe index");
>   
> diff --git a/drivers/md/dm-vdo/dm-vdo-target.c b/drivers/md/dm-vdo/dm-vdo-target.c
> index 5a4b0a927f56..79e861c2887c 100644
> --- a/drivers/md/dm-vdo/dm-vdo-target.c
> +++ b/drivers/md/dm-vdo/dm-vdo-target.c
> @@ -696,6 +696,11 @@ static void handle_parse_error(struct device_config *config, char **error_ptr,
>   	*error_ptr = error_str;
>   }
>   
> +static loff_t vdo_get_device_size(const struct device_config *config)
> +{
> +	return i_size_read(file_inode(config->owned_device->bdev_file));
> +}
> +
>   /**
>    * parse_device_config() - Convert the dmsetup table into a struct device_config.
>    * @argc: The number of table values.
> @@ -878,7 +883,7 @@ static int parse_device_config(int argc, char **argv, struct dm_target *ti,
>   	}
>   
>   	if (config->version == 0) {
> -		u64 device_size = i_size_read(config->owned_device->bdev->bd_inode);
> +		u64 device_size = vdo_get_device_size(config);
>   
>   		config->physical_blocks = device_size / VDO_BLOCK_SIZE;
>   	}
> @@ -1011,7 +1016,7 @@ static void vdo_status(struct dm_target *ti, status_type_t status_type,
>   
>   static block_count_t __must_check get_underlying_device_block_count(const struct vdo *vdo)
>   {
> -	return i_size_read(vdo_get_backing_device(vdo)->bd_inode) / VDO_BLOCK_SIZE;
> +	return vdo_get_device_size(vdo->device_config) / VDO_BLOCK_SIZE;
>   }
>   
>   static int __must_check process_vdo_message_locked(struct vdo *vdo, unsigned int argc,
> diff --git a/drivers/md/dm-vdo/indexer/config.c b/drivers/md/dm-vdo/indexer/config.c
> index 5532371b952f..dcf0742a6145 100644
> --- a/drivers/md/dm-vdo/indexer/config.c
> +++ b/drivers/md/dm-vdo/indexer/config.c
> @@ -344,7 +344,7 @@ int uds_make_configuration(const struct uds_parameters *params,
>   	config->volume_index_mean_delta = DEFAULT_VOLUME_INDEX_MEAN_DELTA;
>   	config->sparse_sample_rate = (params->sparse ? DEFAULT_SPARSE_SAMPLE_RATE : 0);
>   	config->nonce = params->nonce;
> -	config->bdev = params->bdev;
> +	config->bdev_file = params->bdev_file;
>   	config->offset = params->offset;
>   	config->size = params->size;
>   
> diff --git a/drivers/md/dm-vdo/indexer/config.h b/drivers/md/dm-vdo/indexer/config.h
> index 08507dc2f7a1..8ba0cf72dec9 100644
> --- a/drivers/md/dm-vdo/indexer/config.h
> +++ b/drivers/md/dm-vdo/indexer/config.h
> @@ -25,8 +25,8 @@ enum {
>   
>   /* A set of configuration parameters for the indexer. */
>   struct uds_configuration {
> -	/* Storage device for the index */
> -	struct block_device *bdev;
> +	/* File of opened storage device for the index */
> +	struct file *bdev_file;
>   
>   	/* The maximum allowable size of the index */
>   	size_t size;
> diff --git a/drivers/md/dm-vdo/indexer/index-layout.c b/drivers/md/dm-vdo/indexer/index-layout.c
> index 627adc24af3b..32eee76bc246 100644
> --- a/drivers/md/dm-vdo/indexer/index-layout.c
> +++ b/drivers/md/dm-vdo/indexer/index-layout.c
> @@ -1668,7 +1668,7 @@ static int create_layout_factory(struct index_layout *layout,
>   	size_t writable_size;
>   	struct io_factory *factory = NULL;
>   
> -	result = uds_make_io_factory(config->bdev, &factory);
> +	result = uds_make_io_factory(config->bdev_file, &factory);
>   	if (result != UDS_SUCCESS)
>   		return result;
>   
> @@ -1741,9 +1741,9 @@ void uds_free_index_layout(struct index_layout *layout)
>   }
>   
>   int uds_replace_index_layout_storage(struct index_layout *layout,
> -				     struct block_device *bdev)
> +				     struct file *bdev_file)
>   {
> -	return uds_replace_storage(layout->factory, bdev);
> +	return uds_replace_storage(layout->factory, bdev_file);
>   }
>   
>   /* Obtain a dm_bufio_client for the volume region. */
> diff --git a/drivers/md/dm-vdo/indexer/index-layout.h b/drivers/md/dm-vdo/indexer/index-layout.h
> index e9ac6f4302d6..28f9be577631 100644
> --- a/drivers/md/dm-vdo/indexer/index-layout.h
> +++ b/drivers/md/dm-vdo/indexer/index-layout.h
> @@ -24,7 +24,7 @@ int __must_check uds_make_index_layout(struct uds_configuration *config, bool ne
>   void uds_free_index_layout(struct index_layout *layout);
>   
>   int __must_check uds_replace_index_layout_storage(struct index_layout *layout,
> -						  struct block_device *bdev);
> +						  struct file *bdev_file);
>   
>   int __must_check uds_load_index_state(struct index_layout *layout,
>   				      struct uds_index *index);
> diff --git a/drivers/md/dm-vdo/indexer/index-session.c b/drivers/md/dm-vdo/indexer/index-session.c
> index aee0914d604a..914abf5e006b 100644
> --- a/drivers/md/dm-vdo/indexer/index-session.c
> +++ b/drivers/md/dm-vdo/indexer/index-session.c
> @@ -335,7 +335,7 @@ int uds_open_index(enum uds_open_index_type open_type,
>   		vdo_log_error("missing required parameters");
>   		return -EINVAL;
>   	}
> -	if (parameters->bdev == NULL) {
> +	if (parameters->bdev_file == NULL) {
>   		vdo_log_error("missing required block device");
>   		return -EINVAL;
>   	}
> @@ -349,7 +349,7 @@ int uds_open_index(enum uds_open_index_type open_type,
>   		return uds_status_to_errno(result);
>   
>   	session->parameters = *parameters;
> -	format_dev_t(name, parameters->bdev->bd_dev);
> +	format_dev_t(name, file_bdev(parameters->bdev_file)->bd_dev);
>   	vdo_log_info("%s: %s", get_open_type_string(open_type), name);
>   
>   	result = initialize_index_session(session, open_type);
> @@ -460,15 +460,16 @@ int uds_suspend_index_session(struct uds_index_session *session, bool save)
>   	return uds_status_to_errno(result);
>   }
>   
> -static int replace_device(struct uds_index_session *session, struct block_device *bdev)
> +static int replace_device(struct uds_index_session *session,
> +			  struct file *bdev_file)
>   {
>   	int result;
>   
> -	result = uds_replace_index_storage(session->index, bdev);
> +	result = uds_replace_index_storage(session->index, bdev_file);
>   	if (result != UDS_SUCCESS)
>   		return result;
>   
> -	session->parameters.bdev = bdev;
> +	session->parameters.bdev_file = bdev_file;
>   	return UDS_SUCCESS;
>   }
>   
> @@ -477,7 +478,7 @@ static int replace_device(struct uds_index_session *session, struct block_device
>    * device differs from the current backing store, the index will start using the new backing store.
>    */
>   int uds_resume_index_session(struct uds_index_session *session,
> -			     struct block_device *bdev)
> +			     struct file *bdev_file)
>   {
>   	int result = UDS_SUCCESS;
>   	bool no_work = false;
> @@ -502,8 +503,9 @@ int uds_resume_index_session(struct uds_index_session *session,
>   	if (no_work)
>   		return result;
>   
> -	if ((session->index != NULL) && (bdev != session->parameters.bdev)) {
> -		result = replace_device(session, bdev);
> +	if (session->index != NULL &&
> +	    bdev_file != session->parameters.bdev_file) {
> +		result = replace_device(session, bdev_file);
>   		if (result != UDS_SUCCESS) {
>   			mutex_lock(&session->request_mutex);
>   			session->state &= ~IS_FLAG_WAITING;
> diff --git a/drivers/md/dm-vdo/indexer/index.c b/drivers/md/dm-vdo/indexer/index.c
> index 1ba767144426..48b16275a067 100644
> --- a/drivers/md/dm-vdo/indexer/index.c
> +++ b/drivers/md/dm-vdo/indexer/index.c
> @@ -1336,9 +1336,9 @@ int uds_save_index(struct uds_index *index)
>   	return result;
>   }
>   
> -int uds_replace_index_storage(struct uds_index *index, struct block_device *bdev)
> +int uds_replace_index_storage(struct uds_index *index, struct file *bdev_file)
>   {
> -	return uds_replace_volume_storage(index->volume, index->layout, bdev);
> +	return uds_replace_volume_storage(index->volume, index->layout, bdev_file);
>   }
>   
>   /* Accessing statistics should be safe from any thread. */
> diff --git a/drivers/md/dm-vdo/indexer/index.h b/drivers/md/dm-vdo/indexer/index.h
> index edabb239548e..6e2e203f43f7 100644
> --- a/drivers/md/dm-vdo/indexer/index.h
> +++ b/drivers/md/dm-vdo/indexer/index.h
> @@ -72,7 +72,7 @@ int __must_check uds_save_index(struct uds_index *index);
>   void uds_free_index(struct uds_index *index);
>   
>   int __must_check uds_replace_index_storage(struct uds_index *index,
> -					   struct block_device *bdev);
> +					   struct file *bdev_file);
>   
>   void uds_get_index_stats(struct uds_index *index, struct uds_index_stats *counters);
>   
> diff --git a/drivers/md/dm-vdo/indexer/indexer.h b/drivers/md/dm-vdo/indexer/indexer.h
> index 3744aaf625b0..246ff2810e01 100644
> --- a/drivers/md/dm-vdo/indexer/indexer.h
> +++ b/drivers/md/dm-vdo/indexer/indexer.h
> @@ -128,8 +128,8 @@ struct uds_volume_record {
>   };
>   
>   struct uds_parameters {
> -	/* The block_device used for storage */
> -	struct block_device *bdev;
> +	/* The bdev_file used for storage */
> +	struct file *bdev_file;
>   	/* The maximum allowable size of the index on storage */
>   	size_t size;
>   	/* The offset where the index should start */
> @@ -314,7 +314,7 @@ int __must_check uds_suspend_index_session(struct uds_index_session *session, bo
>    * start using the new backing store instead.
>    */
>   int __must_check uds_resume_index_session(struct uds_index_session *session,
> -					  struct block_device *bdev);
> +					  struct file *bdev_file);
>   
>   /* Wait until all outstanding index operations are complete. */
>   int __must_check uds_flush_index_session(struct uds_index_session *session);
> diff --git a/drivers/md/dm-vdo/indexer/io-factory.c b/drivers/md/dm-vdo/indexer/io-factory.c
> index 515765d35794..f4dedb7b7f40 100644
> --- a/drivers/md/dm-vdo/indexer/io-factory.c
> +++ b/drivers/md/dm-vdo/indexer/io-factory.c
> @@ -22,7 +22,7 @@
>    * make helper structures that can be used to access sections of the index.
>    */
>   struct io_factory {
> -	struct block_device *bdev;
> +	struct file *bdev_file;
>   	atomic_t ref_count;
>   };
>   
> @@ -59,7 +59,7 @@ static void uds_get_io_factory(struct io_factory *factory)
>   	atomic_inc(&factory->ref_count);
>   }
>   
> -int uds_make_io_factory(struct block_device *bdev, struct io_factory **factory_ptr)
> +int uds_make_io_factory(struct file *bdev_file, struct io_factory **factory_ptr)
>   {
>   	int result;
>   	struct io_factory *factory;
> @@ -68,16 +68,16 @@ int uds_make_io_factory(struct block_device *bdev, struct io_factory **factory_p
>   	if (result != VDO_SUCCESS)
>   		return result;
>   
> -	factory->bdev = bdev;
> +	factory->bdev_file = bdev_file;
>   	atomic_set_release(&factory->ref_count, 1);
>   
>   	*factory_ptr = factory;
>   	return UDS_SUCCESS;
>   }
>   
> -int uds_replace_storage(struct io_factory *factory, struct block_device *bdev)
> +int uds_replace_storage(struct io_factory *factory, struct file *bdev_file)
>   {
> -	factory->bdev = bdev;
> +	factory->bdev_file = bdev_file;
>   	return UDS_SUCCESS;
>   }
>   
> @@ -90,7 +90,7 @@ void uds_put_io_factory(struct io_factory *factory)
>   
>   size_t uds_get_writable_size(struct io_factory *factory)
>   {
> -	return i_size_read(factory->bdev->bd_inode);
> +	return i_size_read(file_inode(factory->bdev_file));
>   }
>   
>   /* Create a struct dm_bufio_client for an index region starting at offset. */
> @@ -99,8 +99,9 @@ int uds_make_bufio(struct io_factory *factory, off_t block_offset, size_t block_
>   {
>   	struct dm_bufio_client *client;
>   
> -	client = dm_bufio_client_create(factory->bdev, block_size, reserved_buffers, 0,
> -					NULL, NULL, 0);
> +	client = dm_bufio_client_create(file_bdev(factory->bdev_file),
> +					block_size, reserved_buffers,
> +					0, NULL, NULL, 0);
>   	if (IS_ERR(client))
>   		return -PTR_ERR(client);
>   
> diff --git a/drivers/md/dm-vdo/indexer/io-factory.h b/drivers/md/dm-vdo/indexer/io-factory.h
> index 7fb5a0616a79..a3ca84d62f2d 100644
> --- a/drivers/md/dm-vdo/indexer/io-factory.h
> +++ b/drivers/md/dm-vdo/indexer/io-factory.h
> @@ -24,11 +24,11 @@ enum {
>   	SECTORS_PER_BLOCK = UDS_BLOCK_SIZE >> SECTOR_SHIFT,
>   };
>   
> -int __must_check uds_make_io_factory(struct block_device *bdev,
> +int __must_check uds_make_io_factory(struct file *bdev_file,
>   				     struct io_factory **factory_ptr);
>   
>   int __must_check uds_replace_storage(struct io_factory *factory,
> -				     struct block_device *bdev);
> +				     struct file *bdev_file);
>   
>   void uds_put_io_factory(struct io_factory *factory);
>   
> diff --git a/drivers/md/dm-vdo/indexer/volume.c b/drivers/md/dm-vdo/indexer/volume.c
> index 655453bb276b..edbe46252657 100644
> --- a/drivers/md/dm-vdo/indexer/volume.c
> +++ b/drivers/md/dm-vdo/indexer/volume.c
> @@ -1465,12 +1465,12 @@ int uds_find_volume_chapter_boundaries(struct volume *volume, u64 *lowest_vcn,
>   
>   int __must_check uds_replace_volume_storage(struct volume *volume,
>   					    struct index_layout *layout,
> -					    struct block_device *bdev)
> +					    struct file *bdev_file)
>   {
>   	int result;
>   	u32 i;
>   
> -	result = uds_replace_index_layout_storage(layout, bdev);
> +	result = uds_replace_index_layout_storage(layout, bdev_file);
>   	if (result != UDS_SUCCESS)
>   		return result;
>   
> diff --git a/drivers/md/dm-vdo/indexer/volume.h b/drivers/md/dm-vdo/indexer/volume.h
> index 8679a5e55347..1dc3561b8b43 100644
> --- a/drivers/md/dm-vdo/indexer/volume.h
> +++ b/drivers/md/dm-vdo/indexer/volume.h
> @@ -130,7 +130,7 @@ void uds_free_volume(struct volume *volume);
>   
>   int __must_check uds_replace_volume_storage(struct volume *volume,
>   					    struct index_layout *layout,
> -					    struct block_device *bdev);
> +					    struct file *bdev_file);
>   
>   int __must_check uds_find_volume_chapter_boundaries(struct volume *volume,
>   						    u64 *lowest_vcn, u64 *highest_vcn,
> diff --git a/drivers/md/dm-vdo/vdo.c b/drivers/md/dm-vdo/vdo.c
> index fff847767755..eca9f8b51535 100644
> --- a/drivers/md/dm-vdo/vdo.c
> +++ b/drivers/md/dm-vdo/vdo.c
> @@ -809,7 +809,7 @@ void vdo_load_super_block(struct vdo *vdo, struct vdo_completion *parent)
>    */
>   struct block_device *vdo_get_backing_device(const struct vdo *vdo)
>   {
> -	return vdo->device_config->owned_device->bdev;
> +	return file_bdev(vdo->device_config->owned_device->bdev_file);
>   }
>   
>   /**

Al Viro April 10, 2024, 5:40 p.m. UTC | #3

On Wed, Apr 10, 2024 at 01:26:47PM -0400, Matthew Sakai wrote:

> > 'dm_dev->bdev_file', it's ok to get inode from the file.

It can be done much easier, though -

[PATCH] dm-vdo: use bdev_nr_bytes(bdev) instead of i_size_read(bdev->bd_inode)

going to be faster, actually - shift is cheaper than dereference...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
diff --git a/drivers/md/dm-vdo/dm-vdo-target.c b/drivers/md/dm-vdo/dm-vdo-target.c
index 5a4b0a927f56..b423bec6458b 100644
--- a/drivers/md/dm-vdo/dm-vdo-target.c
+++ b/drivers/md/dm-vdo/dm-vdo-target.c
@@ -878,7 +878,7 @@ static int parse_device_config(int argc, char **argv, struct dm_target *ti,
 	}
 
 	if (config->version == 0) {
-		u64 device_size = i_size_read(config->owned_device->bdev->bd_inode);
+		u64 device_size = bdev_nr_bytes(config->owned_device->bdev);
 
 		config->physical_blocks = device_size / VDO_BLOCK_SIZE;
 	}
@@ -1011,7 +1011,7 @@ static void vdo_status(struct dm_target *ti, status_type_t status_type,
 
 static block_count_t __must_check get_underlying_device_block_count(const struct vdo *vdo)
 {
-	return i_size_read(vdo_get_backing_device(vdo)->bd_inode) / VDO_BLOCK_SIZE;
+	return bdev_nr_bytes(vdo_get_backing_device(vdo)) / VDO_BLOCK_SIZE;
 }
 
 static int __must_check process_vdo_message_locked(struct vdo *vdo, unsigned int argc,
diff --git a/drivers/md/dm-vdo/indexer/io-factory.c b/drivers/md/dm-vdo/indexer/io-factory.c
index 515765d35794..1bee9d63dc0a 100644
--- a/drivers/md/dm-vdo/indexer/io-factory.c
+++ b/drivers/md/dm-vdo/indexer/io-factory.c
@@ -90,7 +90,7 @@ void uds_put_io_factory(struct io_factory *factory)
 
 size_t uds_get_writable_size(struct io_factory *factory)
 {
-	return i_size_read(factory->bdev->bd_inode);
+	return bdev_nr_bytes(factory->bdev);
 }
 
 /* Create a struct dm_bufio_client for an index region starting at offset. */

Matthew Sakai April 10, 2024, 6:59 p.m. UTC | #4

On 4/10/24 13:40, Al Viro wrote:
> On Wed, Apr 10, 2024 at 01:26:47PM -0400, Matthew Sakai wrote:
> 
>>> 'dm_dev->bdev_file', it's ok to get inode from the file.
> 
> It can be done much easier, though -
> 
> [PATCH] dm-vdo: use bdev_nr_bytes(bdev) instead of i_size_read(bdev->bd_inode)
> 
> going to be faster, actually - shift is cheaper than dereference...

This does look simpler. And doing this means there's no reason to switch 
dm-vdo from using struct block_device * to using struct file *, so the 
rest of the original patch is unnecessary.

Reviewed-by: Matthew Sakai <msakai@redhat.com>

> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
> ---
> diff --git a/drivers/md/dm-vdo/dm-vdo-target.c b/drivers/md/dm-vdo/dm-vdo-target.c
> index 5a4b0a927f56..b423bec6458b 100644
> --- a/drivers/md/dm-vdo/dm-vdo-target.c
> +++ b/drivers/md/dm-vdo/dm-vdo-target.c
> @@ -878,7 +878,7 @@ static int parse_device_config(int argc, char **argv, struct dm_target *ti,
>   	}
>   
>   	if (config->version == 0) {
> -		u64 device_size = i_size_read(config->owned_device->bdev->bd_inode);
> +		u64 device_size = bdev_nr_bytes(config->owned_device->bdev);
>   
>   		config->physical_blocks = device_size / VDO_BLOCK_SIZE;
>   	}
> @@ -1011,7 +1011,7 @@ static void vdo_status(struct dm_target *ti, status_type_t status_type,
>   
>   static block_count_t __must_check get_underlying_device_block_count(const struct vdo *vdo)
>   {
> -	return i_size_read(vdo_get_backing_device(vdo)->bd_inode) / VDO_BLOCK_SIZE;
> +	return bdev_nr_bytes(vdo_get_backing_device(vdo)) / VDO_BLOCK_SIZE;
>   }
>   
>   static int __must_check process_vdo_message_locked(struct vdo *vdo, unsigned int argc,
> diff --git a/drivers/md/dm-vdo/indexer/io-factory.c b/drivers/md/dm-vdo/indexer/io-factory.c
> index 515765d35794..1bee9d63dc0a 100644
> --- a/drivers/md/dm-vdo/indexer/io-factory.c
> +++ b/drivers/md/dm-vdo/indexer/io-factory.c
> @@ -90,7 +90,7 @@ void uds_put_io_factory(struct io_factory *factory)
>   
>   size_t uds_get_writable_size(struct io_factory *factory)
>   {
> -	return i_size_read(factory->bdev->bd_inode);
> +	return bdev_nr_bytes(factory->bdev);
>   }
>   
>   /* Create a struct dm_bufio_client for an index region starting at offset. */
>

Christian Brauner April 11, 2024, 11:12 a.m. UTC | #5

On Wed, Apr 10, 2024 at 06:40:22PM +0100, Al Viro wrote:
> On Wed, Apr 10, 2024 at 01:26:47PM -0400, Matthew Sakai wrote:
> 
> > > 'dm_dev->bdev_file', it's ok to get inode from the file.
> 
> It can be done much easier, though -
> 
> [PATCH] dm-vdo: use bdev_nr_bytes(bdev) instead of i_size_read(bdev->bd_inode)
> 
> going to be faster, actually - shift is cheaper than dereference...
> 
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
> ---

I've used that patch instead of the original one.

[vfs.all,19/26] dm-vdo: convert to use bdev_file

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