Re: [PATCH 4/4] Btrfs-progs: add super-recover to recover bad supers

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On Wed, Sep 18, 2013 at 11:31:16PM +0800, Wang Shilong wrote:
> >> static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
> >> 					     u64 sb_bytenr,
> >> 					     u64 root_tree_bytenr, int writes,
> >> -					     int partial, int restore)
> >> +					     int partial, int restore,
> >> +					     int run_ioctl)
> > 
> > Yet another parameter to __open_ctree_fd, this really needs a cleanup.
> > (Later is fine.)
> 
> I have considered about this, __open_ctree_fd() is a *static* helper, if i don't
> add another parameter to it. I have to move out of __open_ctree_fd()  into
> open_ctree_with_broken_super() which also seems  not good!

The idea is that all open_ctree* variants will take one parameter that
accumulates what's currently passed via writes/partial/restore/run_ioctl:

#define OPEN_CTREE_PARTIAL 	(1 << 0ULL)
#define OPEN_CTREE_WRITES	(1 << 1ULL)
etc ...

static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path,
					     u64 sb_bytenr,
					     u64 root_tree_bytenr,
					     unsigned open_flags)

and the callers updated accordingly. The calls then look like

- open_ctree_fs_info_restore(target, 0, 0, 0, 1);
+ open_ctree_fs_info_restore(target, 0, 0, OPEN_CTREE_PARTIAL);
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