[PATCH 0/3] btrfs-progs: convert: better ENOSPC handling

[Qu Wenruo <wqu@suse.com>]

This patchset is to address a bug report [1], where even with the bit
overflow bug fixed, the user is still unable to convert an ext4 fs to
btrfs.

The error is -ENOSPC, which triggers BUG_ON() and brings the end to the
convertion.

We're still waiting for the image dump to determine what's the real
cause is, but considering the user is still reporting around 40% free
space, I guess it's something wrong with the extent allocator.

But still, we can enhance btrfs-convert to make it handle errors more
gracefully, with better error message, and even some debugging info like
the available space / total space ratio.

Qu Wenruo (3):
  btrfs-progs: convert: handle errors better in ext2_copy_inodes()
  btrfs-progs: convert: update error message to reflect original fs
    unmodified cases
  btrfs-progs: convert: report available space before convertion happens

 convert/common.h      |  9 +++++++++
 convert/main.c        | 34 +++++++++++++++++++++++++++++++---
 convert/source-ext2.c | 42 +++++++++++++++++++++++++++++++-----------
 convert/source-fs.c   |  1 +
 4 files changed, 72 insertions(+), 14 deletions(-)

-- 
2.27.0