[RFC,05/34] swap: port block device usage to file

Commit Message

Christian Brauner Jan. 3, 2024, 12:55 p.m. UTC

Signed-off-by: Christian Brauner <[e-mail]>
---
 include/linux/swap.h |  2 +-
 mm/swapfile.c        | 22 +++++++++++-----------
 2 files changed, 12 insertions(+), 12 deletions(-)

Patch

diff --git a/include/linux/swap.h b/include/linux/swap.h
index f6dd6575b905..1c1114867637 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -298,7 +298,7 @@  struct swap_info_struct {
 	unsigned int __percpu *cluster_next_cpu; /*percpu index for next allocation */
 	struct percpu_cluster __percpu *percpu_cluster; /* per cpu's swap location */
 	struct rb_root swap_extent_root;/* root of the swap extent rbtree */
-	struct bdev_handle *bdev_handle;/* open handle of the bdev */
+	struct file *f_bdev;		/* open handle of the bdev */
 	struct block_device *bdev;	/* swap device or bdev of swap file */
 	struct file *swap_file;		/* seldom referenced */
 	unsigned int old_block_size;	/* seldom referenced */
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 4bc70f459164..3b2ac701815b 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2530,10 +2530,10 @@  SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
 	exit_swap_address_space(p->type);
 
 	inode = mapping->host;
-	if (p->bdev_handle) {
+	if (p->f_bdev) {
 		set_blocksize(p->bdev, old_block_size);
-		bdev_release(p->bdev_handle);
-		p->bdev_handle = NULL;
+		fput(p->f_bdev);
+		p->f_bdev = NULL;
 	}
 
 	inode_lock(inode);
@@ -2763,14 +2763,14 @@  static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
 	int error;
 
 	if (S_ISBLK(inode->i_mode)) {
-		p->bdev_handle = bdev_open_by_dev(inode->i_rdev,
+		p->f_bdev = bdev_file_open_by_dev(inode->i_rdev,
 				BLK_OPEN_READ | BLK_OPEN_WRITE, p, NULL);
-		if (IS_ERR(p->bdev_handle)) {
-			error = PTR_ERR(p->bdev_handle);
-			p->bdev_handle = NULL;
+		if (IS_ERR(p->f_bdev)) {
+			error = PTR_ERR(p->f_bdev);
+			p->f_bdev = NULL;
 			return error;
 		}
-		p->bdev = p->bdev_handle->bdev;
+		p->bdev = F_BDEV(p->f_bdev);
 		p->old_block_size = block_size(p->bdev);
 		error = set_blocksize(p->bdev, PAGE_SIZE);
 		if (error < 0)
@@ -3206,10 +3206,10 @@  SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
 	p->percpu_cluster = NULL;
 	free_percpu(p->cluster_next_cpu);
 	p->cluster_next_cpu = NULL;
-	if (p->bdev_handle) {
+	if (p->f_bdev) {
 		set_blocksize(p->bdev, p->old_block_size);
-		bdev_release(p->bdev_handle);
-		p->bdev_handle = NULL;
+		fput(p->f_bdev);
+		p->f_bdev = NULL;
 	}
 	inode = NULL;
 	destroy_swap_extents(p);