[PATCH v4 3/3] nfsd: Add DEALLOCATE support

Anna.Schumaker
2014-11-07T19:44:33Z

DEALLOCATE only returns a status value, meaning we can use the noop()
xdr encoder to reply to the client.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
fs/nfsd/nfs4proc.c | 15 +++++++++++++++
fs/nfsd/nfs4xdr.c | 2 +-
fs/nfsd/xdr4.h | 1 +
3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index a261f18..74fb15e 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -33,6 +33,7 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/file.h>
+#include <linux/falloc.h>
#include <linux/slab.h>

#include "idmap.h"
@@ -1044,6 +1045,14 @@ nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
}

static __be32
+nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_fallocate *fallocate)
+{
+ return nfsd4_fallocate(rqstp, cstate, fallocate,
+ FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
+}
+
+static __be32
nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_seek *seek)
{
@@ -1965,6 +1974,12 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_name = "OP_ALLOCATE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
},
+ [OP_DEALLOCATE] = {
+ .op_func = (nfsd4op_func)nfsd4_deallocate,
+ .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
+ .op_name = "OP_DEALLOCATE",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
+ },
[OP_SEEK] = {
.op_func = (nfsd4op_func)nfsd4_seek,
.op_name = "OP_SEEK",
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index a60cff8..0622d4f 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1624,7 +1624,7 @@ static nfsd4_dec nfsd4_dec_ops[] = {
[OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
[OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
[OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index eeaa0d0..90a5925 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -494,6 +494,7 @@ struct nfsd4_op {

/* NFSv4.2 */
struct nfsd4_fallocate allocate;
+ struct nfsd4_fallocate deallocate;
struct nfsd4_seek seek;
} u;
struct nfs4_replay * replay;
--
2.1.3