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[RFC,08/68] vfs: Convert bdev to use the new mount API

Message ID 155373009391.7602.12895418464195854878.stgit@warthog.procyon.org.uk (mailing list archive)
State New, archived
Headers show
Series [RFC,01/68] kbuild: skip sub-make for in-tree build with GNU Make 4.x | expand

Commit Message

David Howells March 27, 2019, 11:41 p.m. UTC
Convert the bdev filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: linux-fsdevel@vger.kernel.org
---

 fs/block_dev.c |   14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
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Patch

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 78d3257435c0..f3151c9c9191 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -25,6 +25,7 @@ 
 #include <linux/writeback.h>
 #include <linux/mpage.h>
 #include <linux/mount.h>
+#include <linux/fs_context.h>
 #include <linux/uio.h>
 #include <linux/namei.h>
 #include <linux/log2.h>
@@ -844,19 +845,16 @@  static const struct super_operations bdev_sops = {
 	.evict_inode = bdev_evict_inode,
 };
 
-static struct dentry *bd_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
+static int bd_init_fs_context(struct fs_context *fc)
 {
-	struct dentry *dent;
-	dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC);
-	if (!IS_ERR(dent))
-		dent->d_sb->s_iflags |= SB_I_CGROUPWB;
-	return dent;
+	fc->s_iflags |= SB_I_CGROUPWB;
+	return vfs_init_pseudo_fs_context(fc, "bdev:",
+					  &bdev_sops, NULL, NULL, BDEVFS_MAGIC);
 }
 
 static struct file_system_type bd_type = {
 	.name		= "bdev",
-	.mount		= bd_mount,
+	.init_fs_context = bd_init_fs_context,
 	.kill_sb	= kill_anon_super,
 };