tree aa055d77b8d3f2b4bc59b1bb8a5b98ec0b223fb5
parent 35ebb934bd7fcc7ca991b155b7980c3c4ff9f1a5
author Chris Mason <chris.mason@oracle.com> 1193930921 -0400
committer Chris Mason <chris.mason@oracle.com> 1222355037 -0400

Btrfs: Fix a number of inline extent problems that Yan Zheng reported.

The fixes do a number of things:

1) Most btrfs_drop_extent callers will try to leave the inline extents in
place.  It can truncate bytes off the beginning of the inline extent if
required.

2) writepage can now update the inline extent, allowing mmap writes to
go directly into the inline extent.

3) btrfs_truncate_in_transaction truncates inline extents

4) extent_map.c fixed to not merge inline extent mappings and hole
mappings together

Signed-off-by: Chris Mason <chris.mason@oracle.com>