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| author | Andy Adamson <andros@netapp.com> | 2011-03-01 01:34:22 +0000 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-11 15:38:43 -0500 |
| commit | 568e8c494ded95a28c5dd8b79b4d3ffb95b6d845 (patch) | |
| tree | 00e71f79575635c0ddfcd1210e263088cc121da2 /fs/nfs/nfs4filelayout.h | |
| parent | ea8eecdd11ee6becd09c095c8efa88aa7df95961 (diff) | |
| download | blackbird-op-linux-568e8c494ded95a28c5dd8b79b4d3ffb95b6d845.tar.gz blackbird-op-linux-568e8c494ded95a28c5dd8b79b4d3ffb95b6d845.zip | |
NFSv4.1: turn off pNFS on ds connection failure
If a data server is unavailable, go through MDS.
Mark the deviceid containing the data server as a negative cache entry.
Do not try to connect to any data server on a deviceid marked as a negative
cache entry. Mark any layout that tries to use the marked deviceid as failed.
Inodes with a layout marked as fails will not use the layout for I/O, and will
not perform any more layoutgets.
Inodes without a layout will still do layoutget, but the layout will get
marked immediately.
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.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h index 23f1e1e2a0f5..ee0c907742b5 100644 --- a/fs/nfs/nfs4filelayout.h +++ b/fs/nfs/nfs4filelayout.h @@ -55,10 +55,14 @@ struct nfs4_pnfs_ds { atomic_t ds_count; }; +/* nfs4_file_layout_dsaddr flags */ +#define NFS4_DEVICE_ID_NEG_ENTRY 0x00000001 + struct nfs4_file_layout_dsaddr { struct hlist_node node; struct nfs4_deviceid deviceid; atomic_t ref; + unsigned long flags; u32 stripe_count; u8 *stripe_indices; u32 ds_num; |
