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authorAndy Adamson <andros@netapp.com>2009-04-03 08:28:01 +0300
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-04-03 17:41:15 -0700
commit0733d21338747483985a5964e852af160d88e429 (patch)
treefb8014cc66d3bfc33e1b7cc6a0da369bccc34cd3 /include
parent069b6ad4bb20abf175ea7875e82e8002154773af (diff)
downloadop-kernel-dev-0733d21338747483985a5964e852af160d88e429.zip
op-kernel-dev-0733d21338747483985a5964e852af160d88e429.tar.gz
nfsd41: exchange_id operation
Implement the exchange_id operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-28 Based on the client provided name, hash a client id. If a confirmed one is found, compare the op's creds and verifier. If the creds match and the verifier is different then expire the old client (client re-incarnated), otherwise, if both match, assume it's a replay and ignore it. If an unconfirmed client is found, then copy the new creds and verifer if need update, otherwise assume replay. The client is moved to a confirmed state on create_session. In the nfs41 branch set the exchange_id flags to EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_SUPP_MOVED_REFER (pNFS is not supported, Referrals are supported, Migration is not.). Address various scenarios from section 18.35 of the spec: 1. Check for EXCHGID4_FLAG_UPD_CONFIRMED_REC_A and set EXCHGID4_FLAG_CONFIRMED_R as appropriate. 2. Return error codes per 18.35.4 scenarios. 3. Update client records or generate new client ids depending on scenario. Note: 18.35.4 case 3 probably still needs revisiting. The handling seems not quite right. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamosn <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: use utsname for major_id (and copy to server_scope)] [nfsd41: fix handling of various exchange id scenarios] Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: reverse use of EXCHGID4_INVAL_FLAG_MASK_A] [simplify nfsd4_encode_exchange_id error handling] [nfsd41: embed an xdr_netobj in nfsd4_exchange_id] [nfsd41: return nfserr_serverfault for spa_how == SP4_MACH_CRED] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/nfsd/state.h2
-rw-r--r--include/linux/nfsd/xdr4.h7
2 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index 5b3a666..8d0b101 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -173,6 +173,8 @@ struct nfs4_client {
/* for nfs41 */
struct list_head cl_sessions;
+ u32 cl_seqid; /* seqid for create_session */
+ u32 cl_exchange_flags;
};
/* struct nfs4_client_reset
diff --git a/include/linux/nfsd/xdr4.h b/include/linux/nfsd/xdr4.h
index 294940c..33ee71e 100644
--- a/include/linux/nfsd/xdr4.h
+++ b/include/linux/nfsd/xdr4.h
@@ -345,7 +345,12 @@ struct nfsd4_write {
};
struct nfsd4_exchange_id {
- int foo; /* stub */
+ nfs4_verifier verifier;
+ struct xdr_netobj clname;
+ u32 flags;
+ clientid_t clientid;
+ u32 seqid;
+ int spa_how;
};
struct nfsd4_create_session {
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