reiserfs: patch queue (v2)

Hi all -

The following are a series of patches that have been kicking around for a while. I thought I'd just put them out there to gauge interest and to get some testing before submitting to -mm.

I've re-ordered a few of the patches. This is actually four distinct, unrelated, though context-dependent, patch series. I've moved the trivial changes to the front of the list to better reflect that.

There are a few groups:
* Little changes (01-04)
- Fixes lockdep warnings in xattr code.
- Changes reiserfs_panic() to panic() instead of BUG.
- Includes bitmap is_reusable unconditionally and uses to to catch corruption. This is light-weight now that the stupid loop is gone.
- Make bitmap used cached first zero bit.

* Error handling (05-11)
- Reformat error/warning/panic/info/etc messages to be consistent with one another.
- Makes some warnings informational. Rather than printing the reiserfs_warning() full preamble to declare that a mount option was invalid, we use reiserfs_info instead.
- Rework reiserfs_warning to take a unique ID, print the function name, print the device name.
- Rework reiserfs_panic similarly.
- Add reiserfs_error() to handle metadata errors.
- Use reiserfs_error().

* Extended attributes (12-22)
- Simplify internal file lookups/opens.
- Eliminate per-super xattr lock.
- Make per-inode xattr lock more fine-grained.
- Remove i_has_xattr_dir flag.
- Remove shared xattr detection (unused).
- Use generic xattr handler infrastructure.
- Use O_NOATIME for internal file opens.
- Add per-file data=ordered mode and use it for xattrs.
- Journal xattrs.
- Kill xattr_readdir in favor of a for_each_xattr.
- Add atomic addition of selinux attributes during inode creation.

* Cleanups, code readability (23-30)
- Cleanup path functions to reduce redundancy.
- Strip trailing whitespace from all reiserfs code.
- Rename p_s_sb to sb.
- Rename p_s_bh to bh.
- Rename p_s_inode to inode.
- Rename p_s_tb to tb.
- Rename misc p_._ variables.
- Rename [cn]_* variables.

* Clean up do_balan.c (31-40)
- Factor out buffer_info initializations.
- Turn tb->s[12]num and tb[12]bytes into an array.
- Split balance_leaf from the 2500 line beast to more manageable chunks.
- Clean up balance_leaf_when_delete.
- Clean up comments.

I look forward to comments. The journaled xattr changes in particular need testing as deadlocks may still lurk in there.

Changes:
- Reworked journal abort code to provide cleaner syslog output
- Always abort journal on error, unless panicking
- Always use bl_ prefix in do_balan.c
- Fixed unchecked deref in reiserfs_free_block

I've also posted the patch set here:
ftp://ftp.suse.com/pub/people/jeffm/reiserfs/kernel-v2.6/2.6.22-rc4-git3/

-Jeff

Jeff Mahoney
SUSE Labs