On Fri, Jul 19, 2013 at 05:03:47PM -0400, bjschuma@xxxxxxxxxx wrote:
> From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
>
> I only implemented the sync version of this call, since it's the
> easiest. I can simply call vfs_copy_range() and have the vfs do the
> right thing for the filesystem being exported.
>
> Signed-off-by: Bryan Schumaker <bjschuma@xxxxxxxxxx>
> ---
> fs/nfsd/nfs4proc.c | 75 ++++++++++++++++++++++++++++---
> fs/nfsd/nfs4state.c | 4 +-
> fs/nfsd/nfs4xdr.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++++++-
> fs/nfsd/state.h | 2 +-
> fs/nfsd/vfs.c | 9 ++++
> fs/nfsd/vfs.h | 1 +
> fs/nfsd/xdr4.h | 24 ++++++++++
> include/linux/nfs4.h | 3 ++
> 8 files changed, 230 insertions(+), 9 deletions(-)
>
> diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
> index a7cee86..d4584ea 100644
> --- a/fs/nfsd/nfs4proc.c
> +++ b/fs/nfsd/nfs4proc.c
> @@ -780,8 +780,9 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
>
> nfs4_lock_state();
> /* check stateid */
> - if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
> - cstate, &read->rd_stateid,
> + if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
> + &cstate->current_fh,
> + &read->rd_stateid,
> RD_STATE, &read->rd_filp))) {
> dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
> goto out;
> @@ -931,7 +932,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
> nfs4_lock_state();
> status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
> - &setattr->sa_stateid, WR_STATE, NULL);
> + &cstate->current_fh, &setattr->sa_stateid, WR_STATE, NULL);
> nfs4_unlock_state();
> if (status) {
> dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
> @@ -999,8 +1000,9 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> return nfserr_inval;
>
> nfs4_lock_state();
> - status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
> - cstate, stateid, WR_STATE, &filp);
> + status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
> + &cstate->current_fh, stateid,
> + WR_STATE, &filp);
> if (status) {
> nfs4_unlock_state();
> dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
> @@ -1028,6 +1030,63 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> return status;
> }
>
> +static __be32
> +nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> + struct nfsd4_copy *copy, struct file **src, struct file **dst)
> +{
> + __be32 status;
> + /* only support copying data to an existing file */
> + if (!cstate->current_fh.fh_dentry || !cstate->save_fh.fh_dentry)
> + return nfserr_nofilehandle;
> +
> + nfs4_lock_state();
> + /* check stateids */
> + if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
> + &cstate->save_fh,
> + ©->cp_src_stateid,
> + RD_STATE, src))){
> + dprintk("NFSD: nfsd4_copy: couldn't process src stateid!\n");
> + goto out;
> + }
> +
> + if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
> + &cstate->current_fh,
> + ©->cp_dst_stateid,
> + WR_STATE, dst))){
> + dprintk("NFSD: nfsd4_copy: couldn't process dst stateid!\n");
> + goto out;
> + }
> +
> +out:
> + nfs4_unlock_state();
> + return status;
> +}
> +
> +static __be32
> +nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> + struct nfsd4_copy *copy)
> +{
> + __be32 status;
> + struct file *src = NULL, *dst = NULL;
> +
> + status = nfsd4_verify_copy(rqstp, cstate, copy, &src, &dst);
> + if (status)
> + return status;
> +
> + status = nfsd_copy_range(src, copy->cp_src_pos,
> + dst, copy->cp_dst_pos,
> + copy->cp_count);
> +
> + if (status == nfs_ok) {
> + copy->cp_res.wr_stateid = NULL;
> + copy->cp_res.wr_bytes_written = copy->cp_count;
> + copy->cp_res.wr_stable_how = NFS_FILE_SYNC;
> + gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp));
> + }
> +
> + return status;
> +}
> +
> /* This routine never returns NFS_OK! If there are no other errors, it
> * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
> * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
> @@ -1840,6 +1899,12 @@ static struct nfsd4_operation nfsd4_ops[] = {
> .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
> .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
> },
> +
> + /* NFSv4.2 operations */
> + [OP_COPY] = {
> + .op_func = (nfsd4op_func)nfsd4_copy,
> + .op_name = "OP_COPY",
This needs more fields filled in. Probably take the OP_WRITE entry as a
starting point.
> + }
> };
>
> #ifdef NFSD_DEBUG
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 280acef..c4e270e 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -3613,12 +3613,12 @@ static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask,
> */
> __be32
> nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
> - stateid_t *stateid, int flags, struct file **filpp)
> + struct svc_fh *current_fh, stateid_t *stateid,
> + int flags, struct file **filpp)
> {
> struct nfs4_stid *s;
> struct nfs4_ol_stateid *stp = NULL;
> struct nfs4_delegation *dp = NULL;
> - struct svc_fh *current_fh = &cstate->current_fh;
> struct inode *ino = current_fh->fh_dentry->d_inode;
> struct nfsd_net *nn = net_generic(net, nfsd_net_id);
> __be32 status;
> diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> index 0c0f3ea9..8f84e9e 100644
> --- a/fs/nfsd/nfs4xdr.c
> +++ b/fs/nfsd/nfs4xdr.c
> @@ -1485,6 +1485,26 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
> }
>
> static __be32
> +nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
> +{
> + DECODE_HEAD;
> +
> + status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
> + if (status)
> + return status;
> + status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
> + if (status)
> + return status;
> +
> + READ_BUF(24);
> + READ64(copy->cp_src_pos);
> + READ64(copy->cp_dst_pos);
> + READ64(copy->cp_count);
> +
> + DECODE_TAIL;
> +}
> +
> +static __be32
> nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
> {
> return nfs_ok;
> @@ -1599,6 +1619,70 @@ static nfsd4_dec nfsd41_dec_ops[] = {
> [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
> };
>
> +static nfsd4_dec nfsd42_dec_ops[] = {
> + [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
> + [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
> + [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
> + [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
> + [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
> + [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
> + [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
> + [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
> + [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
> + [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
> + [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
> + [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
> + [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
> + [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
> + [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
> + [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
> + [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
> + [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
> + [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
> + [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
> + [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
> + [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
> + [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
> + [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
> + [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
> + [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
> + [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
> + [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
> + [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
> + [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
> +
> + /* new operations for NFSv4.1 */
> + [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
> + [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
> + [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_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,
> + [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
> + [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
> + [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
> + [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
> + [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
> + [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
> +
> + /* new operations for NFS v4.2 */
> + [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
> +};
> +
> struct nfsd4_minorversion_ops {
> nfsd4_dec *decoders;
> int nops;
> @@ -1607,7 +1691,7 @@ struct nfsd4_minorversion_ops {
> static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
> [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
> [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
> - [2] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
> + [2] = { nfsd42_dec_ops, ARRAY_SIZE(nfsd42_dec_ops) },
> };
>
> static __be32
> @@ -3518,6 +3602,38 @@ nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
> return nfserr;
> }
>
> +static void
> +nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
> +{
> + __be32 *p;
> +
> + RESERVE_SPACE(4);
> +
> + if (write->wr_stateid == NULL) {
> + WRITE32(0);
> + ADJUST_ARGS();
> + } else {
> + WRITE32(1);
> + ADJUST_ARGS();
> + nfsd4_encode_stateid(resp, write->wr_stateid);
> + }
> +
> + RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
> + WRITE64(write->wr_bytes_written);
> + WRITE32(write->wr_stable_how);
> + WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
> + ADJUST_ARGS();
If I'm reading
http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion2-19 14.1.2
correctly.... This should be just an offset in the error case, right?
Also, may as well share code in the succesful case with
nfsd4_encode_write().
--b.
> +}
> +
> +static __be32
> +nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
> + struct nfsd4_copy *copy)
> +{
> + if (!nfserr)
> + nfsd42_encode_write_res(resp, ©->cp_res);
> + return nfserr;
> +}
> +
> static __be32
> nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
> {
> @@ -3590,6 +3706,9 @@ static nfsd4_enc nfsd4_enc_ops[] = {
> [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
> [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
> [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
> +
> + /* NFSv4.2 operations */
> + [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
> };
>
> /*
> diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
> index 424d8f5..2478805 100644
> --- a/fs/nfsd/state.h
> +++ b/fs/nfsd/state.h
> @@ -455,7 +455,7 @@ struct nfsd4_compound_state;
> struct nfsd_net;
>
> extern __be32 nfs4_preprocess_stateid_op(struct net *net,
> - struct nfsd4_compound_state *cstate,
> + struct nfsd4_compound_state *cstate, struct svc_fh *,
> stateid_t *stateid, int flags, struct file **filp);
> extern void nfs4_lock_state(void);
> extern void nfs4_unlock_state(void);
> diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
> index 8ff6a00..d77958d 100644
> --- a/fs/nfsd/vfs.c
> +++ b/fs/nfsd/vfs.c
> @@ -649,6 +649,15 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
> }
> #endif
>
> +__be32 nfsd_copy_range(struct file *src, u64 src_pos,
> + struct file *dst, u64 dst_pos,
> + u64 count)
> +{
> + int err = vfs_copy_range(src, src_pos, dst, dst_pos, count);
> + if (err < 0)
> + return nfserrno(err);
> + return vfs_fsync_range(dst, dst_pos, dst_pos + count, 0);
> +}
> #endif /* defined(CONFIG_NFSD_V4) */
>
> #ifdef CONFIG_NFSD_V3
> diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
> index a4be2e3..0f26c3b 100644
> --- a/fs/nfsd/vfs.h
> +++ b/fs/nfsd/vfs.h
> @@ -86,6 +86,7 @@ __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
> struct svc_fh *res, struct iattr *);
> __be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
> char *, int, struct svc_fh *);
> +__be32 nfsd_copy_range(struct file *, u64, struct file *, u64, u64);
> __be32 nfsd_rename(struct svc_rqst *,
> struct svc_fh *, char *, int,
> struct svc_fh *, char *, int);
> diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
> index b3ed644..55b9ef7 100644
> --- a/fs/nfsd/xdr4.h
> +++ b/fs/nfsd/xdr4.h
> @@ -430,6 +430,27 @@ struct nfsd4_reclaim_complete {
> u32 rca_one_fs;
> };
>
> +struct nfsd42_write_res {
> + stateid_t *wr_stateid;
> + u64 wr_bytes_written;
> + u32 wr_stable_how;
> + nfs4_verifier wr_verifier;
> +};
> +
> +struct nfsd4_copy {
> + /* request */
> + stateid_t cp_src_stateid;
> + stateid_t cp_dst_stateid;
> +
> + u64 cp_src_pos;
> + u64 cp_dst_pos;
> +
> + u64 cp_count;
> +
> + /* response */
> + struct nfsd42_write_res cp_res;
> +};
> +
> struct nfsd4_op {
> int opnum;
> __be32 status;
> @@ -475,6 +496,9 @@ struct nfsd4_op {
> struct nfsd4_reclaim_complete reclaim_complete;
> struct nfsd4_test_stateid test_stateid;
> struct nfsd4_free_stateid free_stateid;
> +
> + /* NFSv4.2 */
> + struct nfsd4_copy copy;
> } u;
> struct nfs4_replay * replay;
> };
> diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
> index e36dee5..ebf60c6 100644
> --- a/include/linux/nfs4.h
> +++ b/include/linux/nfs4.h
> @@ -110,6 +110,9 @@ enum nfs_opnum4 {
> OP_DESTROY_CLIENTID = 57,
> OP_RECLAIM_COMPLETE = 58,
>
> + /* nfs42 */
> + OP_COPY = 59,
> +
> OP_ILLEGAL = 10044,
> };
>
> --
> 1.8.3.3
>
> --
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