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[RFC,20/34] erofs: port device access to file

Message ID 20240103-vfs-bdev-file-v1-20-6c8ee55fb6ef@kernel.org (mailing list archive)
State New
Headers show
Series Open block devices as files & a bd_inode proposal | expand

Commit Message

Christian Brauner Jan. 3, 2024, 12:55 p.m. UTC 
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/erofs/data.c     |  6 +++---
 fs/erofs/internal.h |  2 +-
 fs/erofs/super.c    | 16 ++++++++--------
 3 files changed, 12 insertions(+), 12 deletions(-)
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Patch

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index c98aeda8abb2..fed9153f2b83 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -220,7 +220,7 @@  int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
 			up_read(&devs->rwsem);
 			return 0;
 		}
-		map->m_bdev = dif->bdev_handle ? dif->bdev_handle->bdev : NULL;
+		map->m_bdev = dif->f_bdev ? F_BDEV(dif->f_bdev) : NULL;
 		map->m_daxdev = dif->dax_dev;
 		map->m_dax_part_off = dif->dax_part_off;
 		map->m_fscache = dif->fscache;
@@ -238,8 +238,8 @@  int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
 			if (map->m_pa >= startoff &&
 			    map->m_pa < startoff + length) {
 				map->m_pa -= startoff;
-				map->m_bdev = dif->bdev_handle ?
-					      dif->bdev_handle->bdev : NULL;
+				map->m_bdev = dif->f_bdev ?
+					      F_BDEV(dif->f_bdev) : NULL;
 				map->m_daxdev = dif->dax_dev;
 				map->m_dax_part_off = dif->dax_part_off;
 				map->m_fscache = dif->fscache;
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index b0409badb017..8ad8957de64c 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -49,7 +49,7 @@  typedef u32 erofs_blk_t;
 struct erofs_device_info {
 	char *path;
 	struct erofs_fscache *fscache;
-	struct bdev_handle *bdev_handle;
+	struct file *f_bdev;
 	struct dax_device *dax_dev;
 	u64 dax_part_off;
 
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 3789d6224513..bc0772445ad5 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -171,7 +171,7 @@  static int erofs_init_device(struct erofs_buf *buf, struct super_block *sb,
 	struct erofs_sb_info *sbi = EROFS_SB(sb);
 	struct erofs_fscache *fscache;
 	struct erofs_deviceslot *dis;
-	struct bdev_handle *bdev_handle;
+	struct file *f_bdev;
 	void *ptr;
 
 	ptr = erofs_read_metabuf(buf, sb, erofs_blknr(sb, *pos), EROFS_KMAP);
@@ -195,12 +195,12 @@  static int erofs_init_device(struct erofs_buf *buf, struct super_block *sb,
 			return PTR_ERR(fscache);
 		dif->fscache = fscache;
 	} else if (!sbi->devs->flatdev) {
-		bdev_handle = bdev_open_by_path(dif->path, BLK_OPEN_READ,
+		f_bdev = bdev_file_open_by_path(dif->path, BLK_OPEN_READ,
 						sb->s_type, NULL);
-		if (IS_ERR(bdev_handle))
-			return PTR_ERR(bdev_handle);
-		dif->bdev_handle = bdev_handle;
-		dif->dax_dev = fs_dax_get_by_bdev(bdev_handle->bdev,
+		if (IS_ERR(f_bdev))
+			return PTR_ERR(f_bdev);
+		dif->f_bdev = f_bdev;
+		dif->dax_dev = fs_dax_get_by_bdev(F_BDEV(f_bdev),
 				&dif->dax_part_off, NULL, NULL);
 	}
 
@@ -748,8 +748,8 @@  static int erofs_release_device_info(int id, void *ptr, void *data)
 	struct erofs_device_info *dif = ptr;
 
 	fs_put_dax(dif->dax_dev, NULL);
-	if (dif->bdev_handle)
-		bdev_release(dif->bdev_handle);
+	if (dif->f_bdev)
+		fput(dif->f_bdev);
 	erofs_fscache_unregister_cookie(dif->fscache);
 	dif->fscache = NULL;
 	kfree(dif->path);