From a11ada99ce93a79393dc6683d22f7915748c8f6b Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Wed, 27 Jul 2022 14:41:18 -0400 Subject: NFSD: Move copy offload callback arguments into a separate structure Refactor so that CB_OFFLOAD arguments can be passed without allocating a whole struct nfsd4_copy object. On my system (x86_64) this removes another 96 bytes from struct nfsd4_copy. Signed-off-by: Chuck Lever --- fs/nfsd/nfs4callback.c | 37 ++++++++++++++++++------------------- fs/nfsd/nfs4proc.c | 44 ++++++++++++++++++++++---------------------- fs/nfsd/xdr4.h | 11 +++++++---- 3 files changed, 47 insertions(+), 45 deletions(-) (limited to 'fs/nfsd') diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 11f8715d92d6..4ce328209f61 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -679,7 +679,7 @@ static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp, * case NFS4_OK: * write_response4 coa_resok4; * default: - * length4 coa_bytes_copied; + * length4 coa_bytes_copied; * }; * struct CB_OFFLOAD4args { * nfs_fh4 coa_fh; @@ -688,21 +688,22 @@ static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp, * }; */ static void encode_offload_info4(struct xdr_stream *xdr, - __be32 nfserr, - const struct nfsd4_copy *cp) + const struct nfsd4_cb_offload *cbo) { __be32 *p; p = xdr_reserve_space(xdr, 4); - *p++ = nfserr; - if (!nfserr) { + *p = cbo->co_nfserr; + switch (cbo->co_nfserr) { + case nfs_ok: p = xdr_reserve_space(xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); p = xdr_encode_empty_array(p); - p = xdr_encode_hyper(p, cp->cp_res.wr_bytes_written); - *p++ = cpu_to_be32(cp->cp_res.wr_stable_how); - p = xdr_encode_opaque_fixed(p, cp->cp_res.wr_verifier.data, + p = xdr_encode_hyper(p, cbo->co_res.wr_bytes_written); + *p++ = cpu_to_be32(cbo->co_res.wr_stable_how); + p = xdr_encode_opaque_fixed(p, cbo->co_res.wr_verifier.data, NFS4_VERIFIER_SIZE); - } else { + break; + default: p = xdr_reserve_space(xdr, 8); /* We always return success if bytes were written */ p = xdr_encode_hyper(p, 0); @@ -710,18 +711,16 @@ static void encode_offload_info4(struct xdr_stream *xdr, } static void encode_cb_offload4args(struct xdr_stream *xdr, - __be32 nfserr, - const struct knfsd_fh *fh, - const struct nfsd4_copy *cp, + const struct nfsd4_cb_offload *cbo, struct nfs4_cb_compound_hdr *hdr) { __be32 *p; p = xdr_reserve_space(xdr, 4); - *p++ = cpu_to_be32(OP_CB_OFFLOAD); - encode_nfs_fh4(xdr, fh); - encode_stateid4(xdr, &cp->cp_res.cb_stateid); - encode_offload_info4(xdr, nfserr, cp); + *p = cpu_to_be32(OP_CB_OFFLOAD); + encode_nfs_fh4(xdr, &cbo->co_fh); + encode_stateid4(xdr, &cbo->co_res.cb_stateid); + encode_offload_info4(xdr, cbo); hdr->nops++; } @@ -731,8 +730,8 @@ static void nfs4_xdr_enc_cb_offload(struct rpc_rqst *req, const void *data) { const struct nfsd4_callback *cb = data; - const struct nfsd4_copy *cp = - container_of(cb, struct nfsd4_copy, cp_cb); + const struct nfsd4_cb_offload *cbo = + container_of(cb, struct nfsd4_cb_offload, co_cb); struct nfs4_cb_compound_hdr hdr = { .ident = 0, .minorversion = cb->cb_clp->cl_minorversion, @@ -740,7 +739,7 @@ static void nfs4_xdr_enc_cb_offload(struct rpc_rqst *req, encode_cb_compound4args(xdr, &hdr); encode_cb_sequence4args(xdr, cb, &hdr); - encode_cb_offload4args(xdr, cp->nfserr, &cp->fh, cp, &hdr); + encode_cb_offload4args(xdr, cbo, &hdr); encode_cb_nops(&hdr); } diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index baea3d39d5ce..ddc747e92e7a 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1645,9 +1645,10 @@ nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) { - struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); + struct nfsd4_cb_offload *cbo = + container_of(cb, struct nfsd4_cb_offload, co_cb); - nfs4_put_copy(copy); + kfree(cbo); } static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, @@ -1763,25 +1764,23 @@ static void cleanup_async_copy(struct nfsd4_copy *copy) nfs4_put_copy(copy); } -static void nfsd4_send_cb_offload(struct nfsd4_copy *copy) +static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr) { - struct nfsd4_copy *cb_copy; + struct nfsd4_cb_offload *cbo; - cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); - if (!cb_copy) + cbo = kzalloc(sizeof(*cbo), GFP_KERNEL); + if (!cbo) return; - refcount_set(&cb_copy->refcount, 1); - memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); - cb_copy->cp_clp = copy->cp_clp; - cb_copy->nfserr = copy->nfserr; - memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); + memcpy(&cbo->co_res, ©->cp_res, sizeof(copy->cp_res)); + memcpy(&cbo->co_fh, ©->fh, sizeof(copy->fh)); + cbo->co_nfserr = nfserr; - nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, - &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); - trace_nfsd_cb_offload(copy->cp_clp, ©->cp_res.cb_stateid, - ©->fh, copy->cp_count, copy->nfserr); - nfsd4_run_cb(&cb_copy->cp_cb); + nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops, + NFSPROC4_CLNT_CB_OFFLOAD); + trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid, + &cbo->co_fh, copy->cp_count, nfserr); + nfsd4_run_cb(&cbo->co_cb); } /** @@ -1794,6 +1793,7 @@ static void nfsd4_send_cb_offload(struct nfsd4_copy *copy) static int nfsd4_do_async_copy(void *data) { struct nfsd4_copy *copy = (struct nfsd4_copy *)data; + __be32 nfserr; if (nfsd4_ssc_is_inter(copy)) { struct file *filp; @@ -1801,21 +1801,21 @@ static int nfsd4_do_async_copy(void *data) filp = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, ©->stateid); if (IS_ERR(filp)) { - copy->nfserr = nfserr_offload_denied; + nfserr = nfserr_offload_denied; nfsd4_interssc_disconnect(copy->ss_mnt); goto do_callback; } - copy->nfserr = nfsd4_do_copy(copy, filp, - copy->nf_dst->nf_file, false); + nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file, + false); nfsd4_cleanup_inter_ssc(copy->ss_mnt, filp, copy->nf_dst); } else { - copy->nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file, - copy->nf_dst->nf_file, false); + nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file, + copy->nf_dst->nf_file, false); nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); } do_callback: - nfsd4_send_cb_offload(copy); + nfsd4_send_cb_offload(copy, nfserr); cleanup_async_copy(copy); return 0; } diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index eb09bf5aa70e..8c8d7b503096 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -533,6 +533,13 @@ struct nfsd42_write_res { stateid_t cb_stateid; }; +struct nfsd4_cb_offload { + struct nfsd4_callback co_cb; + struct nfsd42_write_res co_res; + __be32 co_nfserr; + struct knfsd_fh co_fh; +}; + struct nfsd4_copy { /* request */ stateid_t cp_src_stateid; @@ -550,10 +557,6 @@ struct nfsd4_copy { /* response */ struct nfsd42_write_res cp_res; - - /* for cb_offload */ - struct nfsd4_callback cp_cb; - __be32 nfserr; struct knfsd_fh fh; struct nfs4_client *cp_clp; -- cgit v1.2.3