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NFS: Request fh_expire_type attribute in "server caps" operation

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The fh_expire_type file attribute is a filesystem wide attribute that
consists of flags that indicate what characteristics file handles
on this FSID have.

Our client doesn't support volatile file handles.  It should find
out early (say, at mount time) whether the server is going to play
shenanighans with file handles during a migration.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2012-03-01 17:02:05 -05:00 • committed by Trond Myklebust
parent 81934ddb8e
commit 264e6351c5
4 changed files with 31 additions and 0 deletions
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3
include/linux/nfs_fs_sb.h
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@ -148,6 +148,9 @@ struct nfs_server {
u32 acl_bitmask; /* V4 bitmask representing the ACEs
that are supported on this
filesystem */
u32 fh_expire_type; /* V4 bitmask representing file
handle volatility type for
this filesystem */
struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
struct rpc_wait_queue roc_rpcwaitq;
void *pnfs_ld_data; /* per mount point data */