Btrfs: new backref walking code

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The old backref iteration code could only safely be used on commit roots.
Besides this limitation, it had bugs in finding the roots for these
references. This commit replaces large parts of it by btrfs_find_all_roots()
which a) really finds all roots and the correct roots, b) works correctly
under heavy file system load, c) considers delayed refs.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

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This commit is contained in:

Jan Schmidt 2011-12-02 14:56:41 +01:00

parent 8da6d5815c

commit 4692cf58aa

3 changed files with 107 additions and 262 deletions

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358

fs/btrfs/backref.c

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8

fs/btrfs/ioctl.c

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7

fs/btrfs/scrub.c

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