• Trond Myklebust's avatar
    Merge branch 'fscache' of... · c698dbf9
    Trond Myklebust authored
    Merge branch 'fscache' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into linux-next
    
    Pull fs-cache fixes from David Howells:
    
    Can you pull these commits to fix an issue with NFS whereby caching can be
    enabled on a file that is open for writing by subsequently opening it for
    reading.  This can be made to crash by opening it for writing again if you're
    quick enough.
    
    The gist of the patchset is that the cookie should be acquired at inode
    creation only and subsequently enabled and disabled as appropriate (which
    dispenses with the backing objects when they're not needed).
    
    The extra synchronisation that NFS does can then be dispensed with as it is
    thenceforth managed by FS-Cache.
    
    Could you send these on to Linus?
    
    This likely will need fixing also in CIFS and 9P also once the FS-Cache
    changes are upstream.  AFS and Ceph are probably safe.
    
    * 'fscache' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
      NFS: Use i_writecount to control whether to get an fscache cookie in nfs_open()
      FS-Cache: Provide the ability to enable/disable cookies
      FS-Cache: Add use/unuse/wake cookie wrappers
    c698dbf9
nfs4file.c 3.11 KB