cvs commit: src/sys/kern vfs_vnops.c src/sys/sys mount.h proc.h src/sys/ufs/ffs ffs_extern.h ffs_snapshot.c ffs_vfsops.c

[Konstantin Belousov]

kib         2008-09-16 11:51:06 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_vnops.c 
    sys/sys              mount.h proc.h 
    sys/ufs/ffs          ffs_extern.h ffs_snapshot.c ffs_vfsops.c 
  Log:
  SVN rev 183073 on 2008-09-16 11:51:06Z by kib
  
  When attempt is made to suspend a filesystem that is already syspended,
  wait until the current suspension is lifted instead of silently returning
  success immediately. The consequences of calling vfs_write() resume when
  not owning the suspension are not well-defined at best.
  
  Add the vfs_susp_clean() mount method to be called from
  vfs_write_resume(). Set it to process_deferred_inactive() for ffs, and
  stop calling it manually.
  
  Add the thread flag TDP_IGNSUSP that allows to bypass the suspension
  point in the vn_start_write. It is intended for use by VFS in the
  situations where the suspender want to do some i/o requiring calls to
  vn_start_write(), and this i/o cannot be done later.
  
  Reviewed by:    tegge
  In collaboration with:  pho
  MFC after:       1 month
  
  Revision  Changes    Path
  1.265     +23 -12    src/sys/kern/vfs_vnops.c
  1.233     +6 -0      src/sys/sys/mount.h
  1.520     +1 -0      src/sys/sys/proc.h
  1.77      +1 -0      src/sys/ufs/ffs/ffs_extern.h
  1.145     +5 -2      src/sys/ufs/ffs/ffs_snapshot.c
  1.349     +1 -0      src/sys/ufs/ffs/ffs_vfsops.c