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| author | Andy Adamson <andros@netapp.com> | 2012-04-27 23:53:53 +0200 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-05-19 23:55:33 +0200 |
| commit | 041245c88a29273788e8eff1353bc6e1f56c61df (patch) | |
| tree | 0810bad95fe40c6fbf1a1dc13cb3ba0305ba30d3 /fs/nfs/pnfs.h | |
| parent | NFSv4.1 dereference a disconnected data server client record (diff) | |
| download | linux-041245c88a29273788e8eff1353bc6e1f56c61df.tar.xz linux-041245c88a29273788e8eff1353bc6e1f56c61df.zip | |
NFSv4.1 resend LAYOUTGET on data server invalid layout errors
The "invalid layout" class of errors is handled by destroying the layout and
getting a new layout from the server. Currently, the layout must be
destroyed before a new layout can be obtained.
This means that all references (e.g.lsegs) to the "to be destroyed" layout
header must be dropped before it can be destroyed. This in turn means waiting
for all in flight RPC's using the old layout as well as draining the data
server session slot table wait queue.
Set the NFS_LAYOUT_INVALID flag to redirect I/O to the MDS while waiting for
the old layout to be destroyed.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
| -rw-r--r-- | fs/nfs/pnfs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 9cf9ede8cc52..7980756b2f57 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -63,6 +63,7 @@ enum { NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ NFS_LAYOUT_ROC, /* some lseg had roc bit set */ NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */ + NFS_LAYOUT_INVALID, /* layout is being destroyed */ }; enum layoutdriver_policy_flags { |