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NFSv4.1: mark deviceid invalid on filelayout DS connection errors

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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>
This commit is contained in:
Andy Adamson
2012-04-27 17:53:46 -04:00
committed by Trond Myklebust
parent 98fc685ae2
commit e7dd79af01
4 changed files with 107 additions and 34 deletions
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3
fs/nfs/nfs4filelayout.h
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@@ -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