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NFSv4: Detect support for OPEN4_SHARE_ACCESS_WANT_OPEN_XOR_DELEGATION

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If the server supports the NFSv4.2 protocol extension to optimise away
returning a stateid when it returns a delegation, then we cache that
information in another capability flag.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust
2024-06-16 21:21:33 -04:00
committed by Anna Schumaker
parent 707f13b3d0
commit d2a00cceb9
3 changed files with 7 additions and 0 deletions
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include/uapi/linux/nfs4.h
+2
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@@ -46,6 +46,7 @@
#define NFS4_OPEN_RESULT_CONFIRM 0x0002
#define NFS4_OPEN_RESULT_LOCKTYPE_POSIX 0x0004
#define NFS4_OPEN_RESULT_PRESERVE_UNLINKED 0x0008
#define NFS4_OPEN_RESULT_NO_OPEN_STATEID 0x0010
#define NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK 0x0020
#define NFS4_SHARE_ACCESS_MASK 0x000F
@@ -70,6 +71,7 @@
#define NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED 0x20000
#define NFS4_SHARE_WANT_DELEG_TIMESTAMPS 0x100000
#define NFS4_SHARE_WANT_OPEN_XOR_DELEGATION 0x200000
#define NFS4_CDFC4_FORE 0x1
#define NFS4_CDFC4_BACK 0x2