When an exclusive create is done with the mode bits
set (aka open(testfile, O_CREAT | O_EXCL, 0777)) this
causes a OPEN op followed by a SETATTR op. When a
read delegation is given in the OPEN, it causes
the SETATTR to delay with EAGAIN until the
delegation is recalled.
This patch caused exclusive creates to give out
a write delegation (which turn into no delegation)
which allows the SETATTR seamlessly succeed.
Signed-off-by: Steve Dickson <steved@xxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 316ec84..6b45d0e 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3035,8 +3035,16 @@ nfs4_open_delegation(struct net *net, struct svc_fh *fh,
goto out;
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
flag = NFS4_OPEN_DELEGATE_WRITE;
- else
- flag = NFS4_OPEN_DELEGATE_READ;
+ else {
+ switch(open->op_createmode) {
+ case NFS4_CREATE_EXCLUSIVE:
+ case NFS4_CREATE_EXCLUSIVE4_1:
+ flag = NFS4_OPEN_DELEGATE_WRITE;
+ break;
+ default:
+ flag = NFS4_OPEN_DELEGATE_READ;
+ }
+ }
break;
default:
goto out;
--
1.8.1.4
--
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