Return-Path: Received: from mx142.netapp.com ([216.240.21.19]:7454 "EHLO mx142.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946224AbbHGUie (ORCPT ); Fri, 7 Aug 2015 16:38:34 -0400 From: Anna Schumaker To: , , CC: Subject: [PATCH 6/7] NFSD: Implement the COPY call Date: Fri, 7 Aug 2015 16:38:22 -0400 Message-ID: <1438979904-8775-7-git-send-email-Anna.Schumaker@Netapp.com> In-Reply-To: <1438979904-8775-1-git-send-email-Anna.Schumaker@Netapp.com> References: <1438979904-8775-1-git-send-email-Anna.Schumaker@Netapp.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: From: Anna Schumaker 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: Anna Schumaker --- fs/nfsd/nfs4proc.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/nfs4xdr.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++-- fs/nfsd/vfs.c | 13 +++++++++++ fs/nfsd/vfs.h | 1 + fs/nfsd/xdr4.h | 23 ++++++++++++++++++++ 5 files changed, 160 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index d34c967..fbfb509 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1014,6 +1014,63 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } 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; + + status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, + ©->cp_src_stateid, RD_STATE, + src, NULL); + if (status) { + dprintk("NFSD: nfsd4_copy: couldn't process src stateid!\n"); + return status; + } + + status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, + ©->cp_dst_stateid, WR_STATE, + dst, NULL); + if (status) { + dprintk("NFSD: nfsd4_copy: couldn't process dst stateid!\n"); + fput(*src); + } + + return status; +} + +static __be32 +nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_copy *copy) +{ + ssize_t bytes; + __be32 status; + struct file *src = NULL, *dst = NULL; + + status = nfsd4_verify_copy(rqstp, cstate, copy, &src, &dst); + if (status) + return status; + + bytes = nfsd_copy_range(src, copy->cp_src_pos, + dst, copy->cp_dst_pos, + copy->cp_count); + + if (bytes < 0) + status = nfserrno(bytes); + else { + copy->cp_res.wr_bytes_written = bytes; + copy->cp_res.wr_stable_how = NFS_FILE_SYNC; + copy->cp_consecutive = 1; + copy->cp_synchronous = 1; + gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp)); + status = nfs_ok; + } + + fput(src); + fput(dst); + return status; +} + +static __be32 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_fallocate *fallocate, int flags) { @@ -2283,6 +2340,12 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_name = "OP_DEALLOCATE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, + [OP_COPY] = { + .op_func = (nfsd4op_func)nfsd4_copy, + .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, + .op_name = "OP_COPY", + .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 5463385..3a78c7f 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1675,6 +1675,30 @@ nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, } static __be32 +nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) +{ + DECODE_HEAD; + unsigned int tmp; + + 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(8 + 8 + 8 + 4 + 4 + 4); + p = xdr_decode_hyper(p, ©->cp_src_pos); + p = xdr_decode_hyper(p, ©->cp_dst_pos); + p = xdr_decode_hyper(p, ©->cp_count); + copy->cp_consecutive = be32_to_cpup(p++); + copy->cp_synchronous = be32_to_cpup(p++); + tmp = be32_to_cpup(p); /* Source server list not supported */ + + DECODE_TAIL; +} + +static __be32 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) { DECODE_HEAD; @@ -1774,7 +1798,7 @@ static nfsd4_dec nfsd4_dec_ops[] = { /* new operations for NFSv4.2 */ [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, - [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, @@ -4140,6 +4164,40 @@ nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, #endif /* CONFIG_NFSD_PNFS */ static __be32 +nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write) +{ + __be32 *p; + + p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE); + if (!p) + return nfserr_resource; + + *p++ = cpu_to_be32(0); + p = xdr_encode_hyper(p, write->wr_bytes_written); + *p++ = cpu_to_be32(write->wr_stable_how); + p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, NFS4_VERIFIER_SIZE); + return nfs_ok; +} + +static __be32 +nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, + struct nfsd4_copy *copy) +{ + __be32 *p, err; + + if (!nfserr) { + err = nfsd42_encode_write_res(resp, ©->cp_res); + if (err) + return err; + + p = xdr_reserve_space(&resp->xdr, 4 + 4); + *p++ = cpu_to_be32(copy->cp_consecutive); + *p++ = cpu_to_be32(copy->cp_synchronous); + } + return nfserr; +} + +static __be32 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_seek *seek) { @@ -4238,7 +4296,7 @@ static nfsd4_enc nfsd4_enc_ops[] = { /* NFSv4.2 operations */ [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, - [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, + [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index b5e077a..4065f38 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -36,6 +36,7 @@ #endif /* CONFIG_NFSD_V3 */ #ifdef CONFIG_NFSD_V4 +#include "../internal.h" #include "acl.h" #include "idmap.h" #endif /* CONFIG_NFSD_V4 */ @@ -498,6 +499,18 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp, } #endif +ssize_t nfsd_copy_range(struct file *src, u64 src_pos, + struct file *dst, u64 dst_pos, + u64 count) +{ + ssize_t bytes; + + bytes = vfs_copy_file_range(src, src_pos, dst, dst_pos, count, 0); + if (bytes > 0) + vfs_fsync_range(dst, dst_pos, dst_pos + bytes, 0); + return bytes; +} + __be32 nfsd4_vfs_fallocate(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, loff_t len, int flags) diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 5be875e..c529f9e 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -91,6 +91,7 @@ __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, struct svc_fh *res); __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, char *, int, struct svc_fh *); +ssize_t 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 9f99100..9e83f95 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -491,6 +491,28 @@ struct nfsd4_fallocate { u64 falloc_length; }; +struct nfsd42_write_res { + 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; + + /* both */ + bool cp_consecutive; + bool cp_synchronous; + + /* response */ + struct nfsd42_write_res cp_res; +}; + struct nfsd4_seek { /* request */ stateid_t seek_stateid; @@ -555,6 +577,7 @@ struct nfsd4_op { /* NFSv4.2 */ struct nfsd4_fallocate allocate; struct nfsd4_fallocate deallocate; + struct nfsd4_copy copy; struct nfsd4_seek seek; } u; struct nfs4_replay * replay; -- 2.5.0