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new helper: mount_bdev()

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... and switch of the obvious get_sb_bdev() users to ->mount()

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2010-07-25 00:46:55 +04:00
commit 152a083666
31 changed files with 150 additions and 161 deletions
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28
fs/super.c
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@ -762,10 +762,9 @@ static int test_bdev_super(struct super_block *s, void *data)
return (void *)s->s_bdev == data;
}
int get_sb_bdev(struct file_system_type *fs_type,
struct dentry *mount_bdev(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
int (*fill_super)(struct super_block *, void *, int),
struct vfsmount *mnt)
int (*fill_super)(struct super_block *, void *, int))
{
struct block_device *bdev;
struct super_block *s;
@ -777,7 +776,7 @@ int get_sb_bdev(struct file_system_type *fs_type,
bdev = open_bdev_exclusive(dev_name, mode, fs_type);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
return ERR_CAST(bdev);
/*
* once the super is inserted into the list by sget, s_umount
@ -829,15 +828,30 @@ int get_sb_bdev(struct file_system_type *fs_type,
bdev->bd_super = s;
}
simple_set_mnt(mnt, s);
return 0;
return dget(s->s_root);
error_s:
error = PTR_ERR(s);
error_bdev:
close_bdev_exclusive(bdev, mode);
error:
return error;
return ERR_PTR(error);
}
EXPORT_SYMBOL(mount_bdev);
int get_sb_bdev(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data,
int (*fill_super)(struct super_block *, void *, int),
struct vfsmount *mnt)
{
struct dentry *root;
root = mount_bdev(fs_type, flags, dev_name, data, fill_super);
if (IS_ERR(root))
return PTR_ERR(root);
mnt->mnt_root = root;
mnt->mnt_sb = root->d_sb;
return 0;
}
EXPORT_SYMBOL(get_sb_bdev);