diff options
author | Anna Schumaker <Anna.Schumaker@netapp.com> | 2016-09-07 22:57:30 +0300 |
---|---|---|
committer | J. Bruce Fields <bfields@redhat.com> | 2016-10-07 21:54:25 +0300 |
commit | 29ae7f9dc21a7dda41d78b27bbda7d427ece8ad4 (patch) | |
tree | c162c3003ef26c71d4c1d7353b6f75e75b559ab8 /fs/nfsd/nfs4proc.c | |
parent | 42e616167abb7e4074cfba3a2ca19fa2aba40048 (diff) | |
download | linux-29ae7f9dc21a7dda41d78b27bbda7d427ece8ad4.tar.xz |
NFSD: Implement the COPY call
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 <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
-rw-r--r-- | fs/nfsd/nfs4proc.c | 90 |
1 files changed, 79 insertions, 11 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 1fb222752b2b..abb09b580389 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1010,47 +1010,97 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, } static __be32 -nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, - struct nfsd4_clone *clone) +nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + stateid_t *src_stateid, struct file **src, + stateid_t *dst_stateid, struct file **dst) { - struct file *src, *dst; __be32 status; status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, - &clone->cl_src_stateid, RD_STATE, - &src, NULL); + src_stateid, RD_STATE, src, NULL); if (status) { dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); goto out; } status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, - &clone->cl_dst_stateid, WR_STATE, - &dst, NULL); + dst_stateid, WR_STATE, dst, NULL); if (status) { dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); goto out_put_src; } /* fix up for NFS-specific error code */ - if (!S_ISREG(file_inode(src)->i_mode) || - !S_ISREG(file_inode(dst)->i_mode)) { + if (!S_ISREG(file_inode(*src)->i_mode) || + !S_ISREG(file_inode(*dst)->i_mode)) { status = nfserr_wrong_type; goto out_put_dst; } +out: + return status; +out_put_dst: + fput(*dst); +out_put_src: + fput(*src); + goto out; +} + +static __be32 +nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_clone *clone) +{ + struct file *src, *dst; + __be32 status; + + status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, + &clone->cl_dst_stateid, &dst); + if (status) + goto out; + status = nfsd4_clone_file_range(src, clone->cl_src_pos, dst, clone->cl_dst_pos, clone->cl_count); -out_put_dst: fput(dst); -out_put_src: fput(src); out: return status; } static __be32 +nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_copy *copy) +{ + struct file *src, *dst; + __be32 status; + ssize_t bytes; + + status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src, + ©->cp_dst_stateid, &dst); + if (status) + goto out; + + bytes = nfsd_copy_file_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_UNSTABLE; + 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); +out: + return status; +} + +static __be32 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_fallocate *fallocate, int flags) { @@ -1966,6 +2016,18 @@ static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd op_encode_channel_attrs_maxsz) * sizeof(__be32); } +static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) +{ + return (op_encode_hdr_size + + 1 /* wr_callback */ + + op_encode_stateid_maxsz /* wr_callback */ + + 2 /* wr_count */ + + 1 /* wr_committed */ + + op_encode_verifier_maxsz + + 1 /* cr_consecutive */ + + 1 /* cr_synchronous */) * sizeof(__be32); +} + #ifdef CONFIG_NFSD_PNFS /* * At this stage we don't really know what layout driver will handle the request, @@ -2328,6 +2390,12 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_name = "OP_CLONE", .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_copy_rsize, + }, [OP_SEEK] = { .op_func = (nfsd4op_func)nfsd4_seek, .op_name = "OP_SEEK", |