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nfsd41: CREATE_EXCLUSIVE4_1

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Implement the CREATE_EXCLUSIVE4_1 open mode conforming to
http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26

This mode allows the client to atomically create a file
if it doesn't exist while setting some of its attributes.

It must be implemented if the server supports persistent
reply cache and/or pnfs.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Benny Halevy
2009-04-03 08:29:17 +03:00
committed by J. Bruce Fields
parent 8c18f2052e
commit 79fb54abd2
4 changed files with 43 additions and 7 deletions
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8
include/linux/nfs4.h
View File

@@ -368,7 +368,13 @@ enum opentype4 {
enum createmode4 {
NFS4_CREATE_UNCHECKED = 0,
NFS4_CREATE_GUARDED = 1,
NFS4_CREATE_EXCLUSIVE = 2
NFS4_CREATE_EXCLUSIVE = 2,
/*
* New to NFSv4.1. If session is persistent,
* GUARDED4 MUST be used. Otherwise, use
* EXCLUSIVE4_1 instead of EXCLUSIVE4.
*/
NFS4_CREATE_EXCLUSIVE4_1 = 3
};
enum limit_by4 {

10
include/linux/nfsd/xdr4.h
View File

@@ -219,10 +219,8 @@ struct nfsd4_open {
u32 op_create; /* request */
u32 op_createmode; /* request */
u32 op_bmval[3]; /* request */
union { /* request */
struct iattr iattr; /* UNCHECKED4,GUARDED4 */
nfs4_verifier verf; /* EXCLUSIVE4 */
} u;
struct iattr iattr; /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */
nfs4_verifier verf; /* EXCLUSIVE4 */
clientid_t op_clientid; /* request */
struct xdr_netobj op_owner; /* request */
u32 op_seqid; /* request */
@@ -236,8 +234,8 @@ struct nfsd4_open {
struct nfs4_stateowner *op_stateowner; /* used during processing */
struct nfs4_acl *op_acl;
};
#define op_iattr u.iattr
#define op_verf u.verf
#define op_iattr iattr
#define op_verf verf
struct nfsd4_open_confirm {
stateid_t oc_req_stateid /* request */;