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block: replace fmode_t with a block-specific type for block open flags

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The only overlap between the block open flags mapped into the fmode_t and
other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
blk_mode_t instead for use in blkdev_get_by_{dev,path}, ->open and
->ioctl and stop abusing fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jack Wang <jinpu.wang@ionos.com>		[rnbd]
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230608110258.189493-28-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2023-06-08 13:02:55 +02:00
committed by Jens Axboe
parent 5e4ea83467
commit 05bdb99653
82 changed files with 334 additions and 315 deletions
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32
block/bdev.c
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@@ -93,7 +93,7 @@ EXPORT_SYMBOL(invalidate_bdev);
* Drop all buffers & page cache for given bdev range. This function bails
* with error if bdev has other exclusive owner (such as filesystem).
*/
int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,
loff_t lstart, loff_t lend)
{
/*
@@ -101,14 +101,14 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
* while we discard the buffer cache to avoid discarding buffers
* under live filesystem.
*/
if (!(mode & FMODE_EXCL)) {
if (!(mode & BLK_OPEN_EXCL)) {
int err = bd_prepare_to_claim(bdev, truncate_bdev_range, NULL);
if (err)
goto invalidate;
}
truncate_inode_pages_range(bdev->bd_inode->i_mapping, lstart, lend);
if (!(mode & FMODE_EXCL))
if (!(mode & BLK_OPEN_EXCL))
bd_abort_claiming(bdev, truncate_bdev_range);
return 0;
@@ -647,7 +647,7 @@ static void blkdev_flush_mapping(struct block_device *bdev)
bdev_write_inode(bdev);
}
static int blkdev_get_whole(struct block_device *bdev, fmode_t mode)
static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
{
struct gendisk *disk = bdev->bd_disk;
int ret;
@@ -679,7 +679,7 @@ static void blkdev_put_whole(struct block_device *bdev)
bdev->bd_disk->fops->release(bdev->bd_disk);
}
static int blkdev_get_part(struct block_device *part, fmode_t mode)
static int blkdev_get_part(struct block_device *part, blk_mode_t mode)
{
struct gendisk *disk = part->bd_disk;
int ret;
@@ -743,11 +743,11 @@ void blkdev_put_no_open(struct block_device *bdev)
{
put_device(&bdev->bd_device);
}
/**
* blkdev_get_by_dev - open a block device by device number
* @dev: device number of block device to open
* @mode: FMODE_* mask
* @mode: open mode (BLK_OPEN_*)
* @holder: exclusive holder identifier
* @hops: holder operations
*
@@ -765,7 +765,7 @@ void blkdev_put_no_open(struct block_device *bdev)
* RETURNS:
* Reference to the block_device on success, ERR_PTR(-errno) on failure.
*/
struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
struct block_device *blkdev_get_by_dev(dev_t dev, blk_mode_t mode, void *holder,
const struct blk_holder_ops *hops)
{
bool unblock_events = true;
@@ -775,8 +775,8 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
ret = devcgroup_check_permission(DEVCG_DEV_BLOCK,
MAJOR(dev), MINOR(dev),
((mode & FMODE_READ) ? DEVCG_ACC_READ : 0) |
((mode & FMODE_WRITE) ? DEVCG_ACC_WRITE : 0));
((mode & BLK_OPEN_READ) ? DEVCG_ACC_READ : 0) |
((mode & BLK_OPEN_WRITE) ? DEVCG_ACC_WRITE : 0));
if (ret)
return ERR_PTR(ret);
@@ -786,12 +786,12 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
disk = bdev->bd_disk;
if (holder) {
mode |= FMODE_EXCL;
mode |= BLK_OPEN_EXCL;
ret = bd_prepare_to_claim(bdev, holder, hops);
if (ret)
goto put_blkdev;
} else {
if (WARN_ON_ONCE(mode & FMODE_EXCL)) {
if (WARN_ON_ONCE(mode & BLK_OPEN_EXCL)) {
ret = -EIO;
goto put_blkdev;
}
@@ -821,7 +821,7 @@ struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder,
* writeable reference is too fragile given the way @mode is
* used in blkdev_get/put().
*/
if ((mode & FMODE_WRITE) && !bdev->bd_write_holder &&
if ((mode & BLK_OPEN_WRITE) && !bdev->bd_write_holder &&
(disk->event_flags & DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE)) {
bdev->bd_write_holder = true;
unblock_events = false;
@@ -848,7 +848,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
/**
* blkdev_get_by_path - open a block device by name
* @path: path to the block device to open
* @mode: FMODE_* mask
* @mode: open mode (BLK_OPEN_*)
* @holder: exclusive holder identifier
*
* Open the block device described by the device file at @path. If @holder is
@@ -861,7 +861,7 @@ EXPORT_SYMBOL(blkdev_get_by_dev);
* RETURNS:
* Reference to the block_device on success, ERR_PTR(-errno) on failure.
*/
struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode,
void *holder, const struct blk_holder_ops *hops)
{
struct block_device *bdev;
@@ -873,7 +873,7 @@ struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
return ERR_PTR(error);
bdev = blkdev_get_by_dev(dev, mode, holder, hops);
if (!IS_ERR(bdev) && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
if (!IS_ERR(bdev) && (mode & BLK_OPEN_WRITE) && bdev_read_only(bdev)) {
blkdev_put(bdev, holder);
return ERR_PTR(-EACCES);
}