1. 21 6月, 2012 1 次提交
  2. 20 6月, 2012 3 次提交
  3. 18 6月, 2012 1 次提交
    • T
      NFSv4.1: Fix umount when filelayout DS is also the MDS · 2a4c8994
      Trond Myklebust 提交于
      Currently there is a 'chicken and egg' issue when the DS is also the mounted
      MDS. The nfs_match_client() reference from nfs4_set_ds_client bumps the
      cl_count, the nfs_client is not freed at umount, and nfs4_deviceid_purge_client
      is not called to dereference the MDS usage of a deviceid which holds a
      reference to the DS nfs_client.  The result is the umount program returns,
      but the nfs_client is not freed, and the cl_session hearbeat continues.
      
      The MDS (and all other nfs mounts) lose their last nfs_client reference in
      nfs_free_server when the last nfs_server (fsid) is umounted.
      The file layout DS lose their last nfs_client reference in destroy_ds
      when the last deviceid referencing the data server is put and destroy_ds is
      called. This is triggered by a call to nfs4_deviceid_purge_client which
      removes references to a pNFS deviceid used by an MDS mount.
      
      The fix is to track how many pnfs enabled filesystems are mounted from
      this server, and then to purge the device id cache once that count reaches
      zero.
      Reported-by: NJorge Mora <Jorge.Mora@netapp.com>
      Reported-by: NAndy Adamson <andros@netapp.com>
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      2a4c8994
  4. 15 6月, 2012 1 次提交
  5. 12 6月, 2012 4 次提交
  6. 10 6月, 2012 2 次提交
  7. 08 6月, 2012 3 次提交
  8. 07 6月, 2012 2 次提交
  9. 06 6月, 2012 2 次提交
  10. 05 6月, 2012 4 次提交
  11. 02 6月, 2012 1 次提交
    • M
      nfs: don't open in ->d_revalidate · 0ef97dcf
      Miklos Szeredi 提交于
      NFSv4 can't do reliable opens in d_revalidate, since it cannot know whether a
      mount needs to be followed or not.  It does check d_mountpoint() on the dentry,
      which can result in a weird error if the VFS found that the mount does not in
      fact need to be followed, e.g.:
      
        # mount --bind /mnt/nfs /mnt/nfs-clone
        # echo something > /mnt/nfs/tmp/bar
        # echo x > /tmp/file
        # mount --bind /tmp/file /mnt/nfs-clone/tmp/bar
        # cat  /mnt/nfs/tmp/bar
        cat: /mnt/nfs/tmp/bar: Not a directory
      
      Which should, by any sane filesystem, result in "something" being printed.
      
      So instead do the open in f_op->open() and in the unlikely case that the cached
      dentry turned out to be invalid, drop the dentry and return EOPENSTALE to let
      the VFS retry.
      Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
      CC: Trond Myklebust <Trond.Myklebust@netapp.com>
      Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      0ef97dcf
  12. 01 6月, 2012 4 次提交
  13. 29 5月, 2012 2 次提交
  14. 28 5月, 2012 6 次提交
  15. 27 5月, 2012 2 次提交
  16. 26 5月, 2012 2 次提交