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fuse: Switch to fc_mount() for submounts

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fc_mount() already handles the vfs_get_tree(), sb->s_umount
unlocking and vfs_create_mount() sequence. Using it greatly
simplifies fuse_dentry_automount().

Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Greg Kurz 2021-06-04 18:11:55 +02:00 committed by Miklos Szeredi
parent 266eb3f2fa
commit 29e0e4df9d
1 changed files with 6 additions and 23 deletions
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29
fs/fuse/dir.c
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@ -311,38 +311,21 @@ static struct vfsmount *fuse_dentry_automount(struct path *path)
struct fs_context *fsc;
struct vfsmount *mnt;
struct fuse_inode *mp_fi = get_fuse_inode(d_inode(path->dentry));
int err;
fsc = fs_context_for_submount(path->mnt->mnt_sb->s_type, path->dentry);
if (IS_ERR(fsc)) {
err = PTR_ERR(fsc);
goto out;
}
if (IS_ERR(fsc))
return ERR_CAST(fsc);
/* Pass the FUSE inode of the mount for fuse_get_tree_submount() */
fsc->fs_private = mp_fi;
err = vfs_get_tree(fsc);
if (err)
goto out_put_fsc;
/* We are done configuring the superblock, so unlock it */
up_write(&fsc->root->d_sb->s_umount);
/* Create the submount */
mnt = vfs_create_mount(fsc);
if (IS_ERR(mnt)) {
err = PTR_ERR(mnt);
goto out_put_fsc;
}
mntget(mnt);
mnt = fc_mount(fsc);
if (!IS_ERR(mnt))
mntget(mnt);
put_fs_context(fsc);
return mnt;
out_put_fsc:
put_fs_context(fsc);
out:
return ERR_PTR(err);
}
const struct dentry_operations fuse_dentry_operations = {