NFSD: added FREE_STATEID operation

This operation is used by the client to tell the server to free a
stateid.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 30 insertions, 2 deletions

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 990181103214..ef9bd6f24fc0 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1246,6 +1246,19 @@ nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
 }
 
 static __be32
+nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
+                          struct nfsd4_free_stateid *free_stateid)
+{
+        DECODE_HEAD;
+
+        READ_BUF(sizeof(stateid_t));
+        READ32(free_stateid->fr_stateid.si_generation);
+        COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
+
+        DECODE_TAIL;
+}
+
+static __be32
 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
                       struct nfsd4_sequence *seq)
 {
@@ -1370,7 +1383,7 @@ static nfsd4_dec nfsd41_dec_ops[] = {
         [OP_EXCHANGE_ID]        = (nfsd4_dec)nfsd4_decode_exchange_id,
         [OP_CREATE_SESSION]     = (nfsd4_dec)nfsd4_decode_create_session,
         [OP_DESTROY_SESSION]    = (nfsd4_dec)nfsd4_decode_destroy_session,
-        [OP_FREE_STATEID]       = (nfsd4_dec)nfsd4_decode_notsupp,
+        [OP_FREE_STATEID]       = (nfsd4_dec)nfsd4_decode_free_stateid,
         [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
         [OP_GETDEVICEINFO]      = (nfsd4_dec)nfsd4_decode_notsupp,
         [OP_GETDEVICELIST]      = (nfsd4_dec)nfsd4_decode_notsupp,
@@ -3116,6 +3129,21 @@ nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
 }
 
 static __be32
+nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
+                          struct nfsd4_free_stateid *free_stateid)
+{
+        __be32 *p;
+
+        if (nfserr)
+                return nfserr;
+
+        RESERVE_SPACE(4);
+        WRITE32(nfserr);
+        ADJUST_ARGS();
+        return nfserr;
+}
+
+static __be32
 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
                       struct nfsd4_sequence *seq)
 {
@@ -3196,7 +3224,7 @@ static nfsd4_enc nfsd4_enc_ops[] = {
         [OP_EXCHANGE_ID]        = (nfsd4_enc)nfsd4_encode_exchange_id,
         [OP_CREATE_SESSION]     = (nfsd4_enc)nfsd4_encode_create_session,
         [OP_DESTROY_SESSION]    = (nfsd4_enc)nfsd4_encode_destroy_session,
-        [OP_FREE_STATEID]       = (nfsd4_enc)nfsd4_encode_noop,
+        [OP_FREE_STATEID]       = (nfsd4_enc)nfsd4_encode_free_stateid,
         [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
         [OP_GETDEVICEINFO]      = (nfsd4_enc)nfsd4_encode_noop,
         [OP_GETDEVICELIST]      = (nfsd4_enc)nfsd4_encode_noop,