Commit Graph

10 Commits

Author SHA1 Message Date
pfg
0b111bdfcb Add read-only support for extents in ext2fs.
Basic support for extents was implemented by Zheng Liu as part
of his Google Summer of Code in 2010. This support is read-only
at this time.

In addition to extents we also support the huge_file extension
for read-only purposes. This works nicely with the additional
support for birthtime/nanosec timestamps and dir_index that
have been added lately.

The implementation may not work for all ext4 filesystems as
it doesn't support some features that are being enabled by
default on recent linux like flex_bg. Nevertheless, the feature
should be very useful for migration or simple access in
filesystems that have been converted from ext2/3 or don't use
incompatible features.

Special thanks to Zheng Liu for his dedication and continued
work to support ext2 in FreeBSD.

Submitted by:	Zheng Liu (lz@)
Reviewed by:	Mike Ma, Christoph Mallon (previous version)
Sponsored by:	Google Inc.
MFC after:	3 weeks
2013-08-12 21:34:48 +00:00
pfg
73bb131f84 Initial implementation of the HTree directory index.
This is a port of NetBSD's GSoC 2012 Ext3 HTree directory indexing
by Vyacheslav Matyushin.  It was cleaned up and enhanced for FreeBSD
by Zheng Liu (lz@).

This is an excellent example of work shared among different projects:
Vyacheslav was able to look at an early prototype from Zheng Liu who
was also able to check the code from Haiku (with permission).

As in linux, the feature is not available by default and must be
enabled explicitly with tune2fs. We still do not support the
workarounds required in readdir for NFS.

Submitted by:	Zheng Liu
Tested by:	Mike Ma
Sponsored by:	Google Inc.
MFC after:	1 week
2013-07-06 18:28:06 +00:00
jhb
574178d5e6 Sync with several changes in UFS/FFS:
- 77115: Implement support for O_DIRECT.
- 98425: Fix a performance issue introduced in 70131 that was causing
  reads before writes even when writing full blocks.
- 98658: Rename the BALLOC flags from B_* to BA_* to avoid confusion with
  the struct buf B_ flags.
- 100344: Merge the BA_ and IO_ flags so so that they may both be used in
  the same flags word. This merger is possible by assigning the IO_ flags
  to the low sixteen bits and the BA_ flags the high sixteen bits.
- 105422: Fix a file-rewrite performance case.
- 129545: Implement IO_INVAL in VOP_WRITE() by marking the buffer as
  "no cache".
- Readd the DOINGASYNC() macro and use it to control asynchronous writes.
  Change i-node updates to honor DOINGASYNC() instead of always being
  synchronous.
- Use a PRIV_VFS_RETAINSUGID check instead of checking cr_uid against 0
  directly when deciding whether or not to clear suid and sgid bits.

Submitted by:	Pedro F. Giffuni  giffunip at yahoo
2011-04-28 14:27:17 +00:00
lulf
8ab7715033 Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer
of Code 2009:

- BSDL block and inode allocation policies for ext2fs. This involves the use
  FFS1 style block and inode allocation for ext2fs. Preallocation was removed
  since it was GPL'd.
- Make ext2fs MPSAFE by introducing locks to per-mount datastructures.
- Fixes for kern/122047 PR.
- Various small bugfixes.
- Move out of gnu/ directory.

Sponsored by:   Google Inc.
Submitted by:	Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>
2010-01-14 14:30:54 +00:00
rodrigc
d5a287bf04 Move ext2fs from src/gnu to src/gnu/fs.
Discussed on arch@.

Reviewed by:	kan
Approved by:	re (blanket), kan
2005-06-15 02:36:11 +00:00
phk
6ead7c4f27 Use vfs_hash() instead of home-rolled 2005-03-14 13:30:06 +00:00
iedowse
4009aa43de Complete the separation of ext2fs from ufs by copying the remaining
shared code and converting all ufs references. Originally it may
have made sense to share common features between the two filesystems,
but recently it has only caused problems, the UFS2 work being the
final straw.

All UFS_* indirect calls are now direct calls to ext2_* functions,
and ext2fs-specific mount and inode structures have been introduced.
2002-05-16 19:08:03 +00:00
bde
c04de2411b Fixed some style bugs (disordered SRCS and garbage comment near EOF). 2002-01-11 16:49:30 +00:00
ru
3f4f85365b Drop <bsd.man.mk> support from <bsd.kmod.mk>.
Not objected to by:	-current
2002-01-11 15:49:02 +00:00
mr
566e7fc3d3 Add ext2fs module 2001-09-13 08:27:23 +00:00