cvs commit: src/sys/kern vfs_syscalls.c

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

dillon      2005/08/15 00:26:47 PDT

DragonFly src repository

  Modified files:
    sys/kern             vfs_syscalls.c 
  Log:
  UFS sometimes reports: 'ufs_rename: fvp == tvp (can't happen)'.  The case
  is not supposed to be able to happen, and UFS ignores the rename operation
  when it sees it.   This is true in both FreeBSD and DragonFly.
  
  But, in fact, the case CAN happen if you rename a file to another that
  happens to be a hardlink to the first.  The rename operations appears to
  succeed but winds up being a NOP because UFS incorrectly believes that the
  case represents renaming a file to itself when it doesn't.  Both files
  remain in existance when the source file should have been removed.
  
  Detect the condition and issue VOP_NREMOVE instead of VOP_NRENAME when
  the source and target represent different namespaces but wind up pointing
  to the same physical vnode.
  
  Reported-by: =?ISO-8859-2?Q?Toma=BE_Bor=B9tnar?= <tomaz.borstnar@xxxxxxxx>
  
  Revision  Changes    Path
  1.69      +15 -3     src/sys/kern/vfs_syscalls.c


http://www.dragonflybsd.org/cvsweb/src/sys/kern/vfs_syscalls.c.diff?r1=1.68&r2=1.69&f=u