From: Christoph Hellwig <hch@lst.de>
Date: Tue, 12 Oct 2021 12:44:50 +0200
Subject: [PATCH] block: merge block_ioctl into blkdev_ioctl
Git-commit: 8a709512eae7ccd5ba73e8634474caadbc9ebe76
Patch-mainline: v5.16-rc1
References: jsc#PED-1183

Simplify the ioctl path and match the code structure on the compat side.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211012104450.659013-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 block/blk.h   |  3 +--
 block/fops.c  | 19 +------------------
 block/ioctl.c | 18 ++++++++++++++----
 3 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/block/blk.h b/block/blk.h
index eadb2a640a69..618482b29671 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -405,8 +405,7 @@ static inline void bio_clear_hipri(struct bio *bio)
 	bio->bi_opf &= ~REQ_HIPRI;
 }
 
-int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
-		unsigned long arg);
+long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);
 
 extern const struct address_space_operations def_blk_aops;
diff --git a/block/fops.c b/block/fops.c
index 1e970c247e0e..7bb9581a146c 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -461,23 +461,6 @@ static int blkdev_close(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
-{
-	struct block_device *bdev = I_BDEV(bdev_file_inode(file));
-	fmode_t mode = file->f_mode;
-
-	/*
-	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
-	 * to updated it before every ioctl.
-	 */
-	if (file->f_flags & O_NDELAY)
-		mode |= FMODE_NDELAY;
-	else
-		mode &= ~FMODE_NDELAY;
-
-	return blkdev_ioctl(bdev, mode, cmd, arg);
-}
-
 /*
  * Write data to the block device.  Only intended for the block device itself
  * and the raw driver which basically is a fake block device.
@@ -621,7 +604,7 @@ const struct file_operations def_blk_fops = {
 	.iopoll		= blkdev_iopoll,
 	.mmap		= generic_file_mmap,
 	.fsync		= blkdev_fsync,
-	.unlocked_ioctl	= block_ioctl,
+	.unlocked_ioctl	= blkdev_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= compat_blkdev_ioctl,
 #endif
diff --git a/block/ioctl.c b/block/ioctl.c
index 0f823444cc55..77b1b2453f39 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -538,12 +538,22 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode,
  *
  * New commands must be compatible and go into blkdev_common_ioctl
  */
-int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
-			unsigned long arg)
+long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 {
-	int ret;
-	loff_t size;
+	struct block_device *bdev = I_BDEV(file->f_mapping->host);
 	void __user *argp = (void __user *)arg;
+	fmode_t mode = file->f_mode;
+	loff_t size;
+	int ret;
+
+	/*
+	 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
+	 * to updated it before every ioctl.
+	 */
+	if (file->f_flags & O_NDELAY)
+		mode |= FMODE_NDELAY;
+	else
+		mode &= ~FMODE_NDELAY;
 
 	switch (cmd) {
 	/* These need separate implementations for the data structure */
-- 
2.35.3