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bdev: remove bdev pointer from struct bdev_handle

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We can always go directly via:

* I_BDEV(bdev_file->f_inode)
* I_BDEV(bdev_file->f_mapping->host)

So keeping struct bdev in struct bdev_handle is redundant.

Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-30-adbd023e19cc@kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
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 14:26:47 +01:00
parent a56aefca8d
commit 7c09a4ed61
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
3 changed files with 14 additions and 17 deletions
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26
block/bdev.c
View File

@ -51,8 +51,7 @@ EXPORT_SYMBOL(I_BDEV);
struct block_device *file_bdev(struct file *bdev_file)
{
struct bdev_handle *handle = bdev_file->private_data;
return handle->bdev;
return I_BDEV(bdev_file->f_mapping->host);
}
EXPORT_SYMBOL(file_bdev);
@ -891,7 +890,6 @@ int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,
if (unblock_events)
disk_unblock_events(disk);
handle->bdev = bdev;
handle->holder = holder;
handle->mode = mode;
@ -899,7 +897,7 @@ int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,
bdev_file->f_mode |= FMODE_BUF_RASYNC | FMODE_CAN_ODIRECT;
if (bdev_nowait(bdev))
bdev_file->f_mode |= FMODE_NOWAIT;
bdev_file->f_mapping = handle->bdev->bd_inode->i_mapping;
bdev_file->f_mapping = bdev->bd_inode->i_mapping;
bdev_file->f_wb_err = filemap_sample_wb_err(bdev_file->f_mapping);
bdev_file->private_data = handle;
@ -985,7 +983,7 @@ struct file *bdev_file_open_by_path(const char *path, blk_mode_t mode,
void *holder,
const struct blk_holder_ops *hops)
{
struct file *bdev_file;
struct file *file;
dev_t dev;
int error;
@ -993,22 +991,22 @@ struct file *bdev_file_open_by_path(const char *path, blk_mode_t mode,
if (error)
return ERR_PTR(error);
bdev_file = bdev_file_open_by_dev(dev, mode, holder, hops);
if (!IS_ERR(bdev_file) && (mode & BLK_OPEN_WRITE)) {
struct bdev_handle *handle = bdev_file->private_data;
if (bdev_read_only(handle->bdev)) {
fput(bdev_file);
bdev_file = ERR_PTR(-EACCES);
file = bdev_file_open_by_dev(dev, mode, holder, hops);
if (!IS_ERR(file) && (mode & BLK_OPEN_WRITE)) {
if (bdev_read_only(file_bdev(file))) {
fput(file);
file = ERR_PTR(-EACCES);
}
}
return bdev_file;
return file;
}
EXPORT_SYMBOL(bdev_file_open_by_path);
void bdev_release(struct bdev_handle *handle)
void bdev_release(struct file *bdev_file)
{
struct block_device *bdev = handle->bdev;
struct block_device *bdev = file_bdev(bdev_file);
struct bdev_handle *handle = bdev_file->private_data;
struct gendisk *disk = bdev->bd_disk;
/*

3
block/blk.h
View File

@ -26,7 +26,6 @@ struct blk_flush_queue {
};
struct bdev_handle {
struct block_device *bdev;
void *holder;
blk_mode_t mode;
};
@ -522,7 +521,7 @@ static inline int req_ref_read(struct request *req)
return atomic_read(&req->ref);
}
void bdev_release(struct bdev_handle *handle);
void bdev_release(struct file *bdev_file);
int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,
const struct blk_holder_ops *hops, struct file *bdev_file);
int bdev_permission(dev_t dev, blk_mode_t mode, void *holder);

2
block/fops.c
View File

@ -623,7 +623,7 @@ static int blkdev_open(struct inode *inode, struct file *filp)
static int blkdev_release(struct inode *inode, struct file *filp)
{
if (filp->private_data)
bdev_release(filp->private_data);
bdev_release(filp);
return 0;
}