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authorAndy Adamson <andros@netapp.com>2012-04-27 23:53:46 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-05-19 23:54:20 +0200
commite7dd79af01e7ca932c5168a708e77750659f7a9e (patch)
treedfacd16bce6df877ecae697cd7dbf5f8e0561872 /fs/nfs/nfs4filelayout.h
parentNFSv4.1 data server timeo and retrans module parameters (diff)
downloadlinux-e7dd79af01e7ca932c5168a708e77750659f7a9e.tar.xz
linux-e7dd79af01e7ca932c5168a708e77750659f7a9e.zip
NFSv4.1: mark deviceid invalid on filelayout DS connection errors
This prevents the use of any layout for i/o that references the deviceid. I/O is redirected through the MDS. Redirect the unhandled failed I/O to the MDS without marking either the layout or the deviceid invalid. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4filelayout.h')
-rw-r--r--fs/nfs/nfs4filelayout.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h
index 6fb1901ffd6a..3259be60da92 100644
--- a/fs/nfs/nfs4filelayout.h
+++ b/fs/nfs/nfs4filelayout.h
@@ -48,6 +48,9 @@
#define NFS4_PNFS_MAX_STRIPE_CNT 4096
#define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */
+/* error codes for internal use */
+#define NFS4ERR_RESET_TO_MDS 12001
+
enum stripetype4 {
STRIPE_SPARSE = 1,
STRIPE_DENSE = 2