cvs commit: src/sys/fs/tmpfs tmpfs.h tmpfs_subr.c tmpfs_vfsops.c tmpfs_vnops.c

[Xin LI]

delphij     2007-11-18 04:52:41 UTC

  FreeBSD src repository

  Modified files:
    sys/fs/tmpfs         tmpfs.h tmpfs_subr.c tmpfs_vfsops.c 
                         tmpfs_vnops.c 
  Log:
  MFp4: Several fixes to tmpfs which makes it to survive from pho@'s
  strees2 suite, to quote his letter, this change:
  
  1. It removes the tn_lookup_dirent stuff. I think this cannot be fixed,
     because nothing protects vnode/tmpfs node between lookup is done, and
     actual operation is performed, in the case the vnode lock is dropped.
     At least, this is the case with the from vnode for rename.
  
     For now, we do the linear lookup in the parent node. This has its own
     drawbacks. Not mentioning speed (that could be fixed by using hash), the
     real problem is the situation where several hardlinks exist in the dvp.
     But, I think this is fixable.
  
  2. The patch restores the VV_ROOT flag on the root vnode after it became
     reclaimed and allocated again. This fixes MPASS assertion at the start
     of the tmpfs_lookup() reported by many.
  
  Submitted by:   kib
  
  Revision  Changes    Path
  1.12      +2 -6      src/sys/fs/tmpfs/tmpfs.h
  1.13      +25 -3     src/sys/fs/tmpfs/tmpfs_subr.c
  1.14      +0 -1      src/sys/fs/tmpfs/tmpfs_vfsops.c
  1.12      +19 -23    src/sys/fs/tmpfs/tmpfs_vnops.c