Hi all,
this series adds support for buffered writes without buffer heads to
the iomap and XFS code.
Note: the iomap patches should go into a shared branch for the gfs2
iomap work.
A git tree is available at:
git://git.infradead.org/users/hch/xfs.git xfs-iomap-write.6
Gitweb:
http://git.infradead.org/users/hch/xfs.git/shortlog/refs/heads/xfs-iomap-write.6
Changes since v5:
- merged the leftovers of the previous series into one
- rebased on top of the gfs2 iomap prep series
- fixed the map_blocks map conditions
- clean up a loop in __iomap_write_begin
Changes since v4:
- make the logic more clear in xfs_bmap_punch_delalloc_range
- fix a missing unlock in xfs_bmap_punch_delalloc_range
- always look up COW extents to check for overlaps
- lots of patch reshuffling and splitting without impact to the final
result
Changes since v3:
- iterate backwards in xfs_bmap_punch_delalloc_range
- remove the cow_valid variable in xfs_reflink_trim_irec_to_next_cow
- additional trivial xfs_map_blocks simplifications
- split the read side into a separate prep series
- moved the SEEK_HOLE/DATA patches not strictly required out of the
series
Changes since v2:
- minor page_seek_hole_data tweaks
- don't read data entirely covered by the write operation in write_begin
- fix zeroing on write_begin I/O failure
- remove iomap_block_needs_zeroing to make the code more clear
- update comments on __do_page_cache_readahead
Changes since v1:
- fix the iomap_readpages error handling
- use unsigned file offsets in a few places to avoid arithmetic overflows
- allocate a iomap_page in iomap_page_mkwrite to fix generic/095
- improve a few comments
- add more asserts
- warn about truncated block numbers from ->bmap
- new patch to change the __do_page_cache_readahead return value to
unsigned int
- remove an incorrectly added empty line
- make inline data an explicit iomap type instead of a flag
- add a IOMAP_F_BUFFER_HEAD flag to force use of buffers heads for gfs2,
and keep the basic buffer head infrastructure around for now.
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