CVS commit: src/sys/fs/tmpfs

["Mindaugas Rasiukevicius" <rmind%netbsd.org@localhost>]

Module Name:    src
Committed By:   rmind
Date:           Sun May 29 22:29:07 UTC 2011

Modified Files:
        src/sys/fs/tmpfs: tmpfs.h tmpfs_subr.c tmpfs_vfsops.c tmpfs_vnops.c

Log Message:
- Rework and document inode reference counting.  Also document inode life
  cycle (destruction part).  Perform link counting in tmpfs_dir_attach()
  and tmpfs_dir_detach(), instead of alloc/free and arbitrary places.
  Fixes PR/44285, PR/44288, PR/44657 and likely PR/42484.

- Fix the race between the lookup and inode destruction.  Fixes PR/43167
  and its duplicates PR/40088, PR/40757.

- Improve tmpfs_rename() locking a little, fix kqueue event notifications
  and also fix PR/43617.  Add simplistic tmpfs_parentcheck_p(); to be
  expanded and used for further rename() locking fixes.

- Cache directory entry "hint" in the tmpfs node, add tmpfs_dir_cached(),
  and thus avoid unnecessary lookup in tmpfs_remove() and tmpfs_rmdir().

- Set correct _PC_FILESIZEBITS value in tmpfs_pathconf().  Fixes PR/43576.

- Few minor fixes.


To generate a diff of this commit:
cvs rdiff -u -r1.43 -r1.44 src/sys/fs/tmpfs/tmpfs.h
cvs rdiff -u -r1.70 -r1.71 src/sys/fs/tmpfs/tmpfs_subr.c
cvs rdiff -u -r1.50 -r1.51 src/sys/fs/tmpfs/tmpfs_vfsops.c
cvs rdiff -u -r1.84 -r1.85 src/sys/fs/tmpfs/tmpfs_vnops.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.