This crude patch illustrates the simplest plumbing involved in
supporting sys_call_range with the NFS COPY operation that's pending in
the 4.2 draft spec.
The patch is based on a previous prototype that used the COPY op to
implement sys_copyfileat which created a new file (based on the ocfs2
reflink ioctl). By contrast, this copies file contents between existing
files.
There's still a lot of implementation and testing to do, but this can
get discussion going.
---
fs/nfs/file.c | 25 +++++++++
fs/nfs/nfs4proc.c | 72 ++++++++++++++++++++++++++
fs/nfs/nfs4xdr.c | 132 ++++++++++++++++++++++++++++++++++++++++++++++++
fs/nfsd/nfs4proc.c | 35 +++++++++++++
fs/nfsd/nfs4xdr.c | 43 ++++++++++++++++
fs/nfsd/vfs.c | 41 +++++++++++++++
fs/nfsd/vfs.h | 3 ++
fs/nfsd/xdr4.h | 21 ++++++++
include/linux/nfs4.h | 6 ++-
include/linux/nfs_xdr.h | 24 +++++++++
10 files changed, 401 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index a87a44f..7d7bedf 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -917,6 +917,30 @@ int nfs_setlease(struct file *file, long arg, struct
file_lock **fl)
}
EXPORT_SYMBOL_GPL(nfs_setlease);
+ssize_t nfs_copy_range(struct file *file_in, loff_t pos_in,
+ struct file *file_out, loff_t pos_out,
+ size_t count)
+{
+ struct dentry *dentry_in = file_in->f_path.dentry;
+ struct dentry *dentry_out = file_out->f_path.dentry;
+ struct inode *inode_in = dentry_in->d_inode;
+ struct inode *inode_out = dentry_out->d_inode;
+ loff_t ret;
+
+ dprintk("NFS copy_range(%s/%s@%llu, %s/%s@%llu, %zd)\n",
+ dentry_in->d_parent->d_name.name, dentry_in->d_name.name,
+ (unsigned long long)pos_in,
+ dentry_out->d_parent->d_name.name, dentry_out->d_name.name,
+ (unsigned long long)pos_out, count);
+
+ if (NFS_PROTO(inode_in)->copy == NULL)
+ ret = -EOPNOTSUPP;
+ else
+ ret = NFS_PROTO(inode_in)->copy(inode_in, inode_out, NULL,
+ 0, count, pos_in, pos_out);
+ return ret;
+}
+
const struct file_operations nfs_file_operations = {
.llseek = nfs_file_llseek,
.read = do_sync_read,
@@ -934,5 +958,6 @@ const struct file_operations nfs_file_operations = {
.splice_write = nfs_file_splice_write,
.check_flags = nfs_check_flags,
.setlease = nfs_setlease,
+ .copy_range = nfs_copy_range,
};
EXPORT_SYMBOL_GPL(nfs_file_operations);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 8fbc100..1586b3e 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5405,6 +5405,75 @@ int nfs4_proc_secinfo(struct inode *dir, const struct
qstr *name,
}
#ifdef CONFIG_NFS_V4_1
+static loff_t _nfs4_proc_copy(struct inode *inode,
+ struct inode *dir,
+ struct qstr *name,
+ int flags,
+ loff_t nbyte,
+ loff_t src_offset,
+ loff_t dst_offset)
+{
+ struct nfs_server *server = NFS_SERVER(inode);
+ int status;
+ struct nfs_copy_args arg = {
+ .fh = NFS_FH(inode),
+ .dir_fh = NFS_FH(dir),
+ .src_offset = src_offset,
+ .dst_offset = dst_offset,
+ .count = nbyte,
+ .flags = flags,
+ .destination = name,
+ .bitmask = server->attr_bitmask,
+ };
+ struct nfs_copy_res res = {
+ .fh = NFS_FH(inode),
+ .callback_id_length = 0,
+ .callback_id = 0,
+ .bytes_copied = 0,
+ .server = server,
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
+ .rpc_argp = &arg,
+ .rpc_resp = &res,
+ };
+
+ res.fattr = nfs_alloc_fattr();
+ if (res.fattr == NULL)
+ return -ENOMEM;
+
+ status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args,
+ &res.seq_res, 1);
+ if (res.bytes_copied)
+ status = res.bytes_copied;
+
+ nfs_free_fattr(res.fattr);
+ return status;
+}
+
+static loff_t nfs4_proc_copy(struct inode *inode,
+ struct inode *dir,
+ struct qstr *name,
+ int flags,
+ loff_t nbyte,
+ loff_t src_offset,
+ loff_t dst_offset)
+{
+ struct nfs4_exception exception = {0, };
+ loff_t ret;
+
+ do {
+ ret = _nfs4_proc_copy(inode, dir, name, flags, nbyte,
+ src_offset, dst_offset);
+ if (ret < 0)
+ ret = nfs4_handle_exception(NFS_SERVER(inode), ret,
+ &exception);
+ } while (exception.retry);
+
+ return ret;
+}
+
+
/*
* Check the exchange flags returned by the server for invalid flags, having
* both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
@@ -7097,6 +7166,9 @@ const struct nfs_rpc_ops nfs_v4_clientops = {
.free_client = nfs4_free_client,
.create_server = nfs4_create_server,
.clone_server = nfs_clone_server,
+#ifdef CONFIG_NFS_V4_1
+ .copy = nfs4_proc_copy,
+#endif
};
static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 4be8d13..28598b0 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -397,6 +397,8 @@ static int nfs4_stat_to_errno(int);
#define encode_free_stateid_maxsz (op_encode_hdr_maxsz + 1 + \
XDR_QUADLEN(NFS4_STATEID_SIZE))
#define decode_free_stateid_maxsz (op_decode_hdr_maxsz + 1)
+#define encode_copy_maxsz (op_encode_hdr_maxsz + 8 + nfs4_name_maxsz)
+#define decode_copy_maxsz (op_decode_hdr_maxsz + 1 + decode_stateid_maxsz)
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
@@ -840,6 +842,22 @@ static int nfs4_stat_to_errno(int);
#define NFS4_dec_free_stateid_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_free_stateid_maxsz)
+#define NFS4_enc_copy_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_savefh_maxsz + \
+ encode_putfh_maxsz + \
+ encode_copy_maxsz + \
+ encode_getfh_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_copy_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_savefh_maxsz + \
+ decode_putfh_maxsz + \
+ decode_copy_maxsz + \
+ decode_getfh_maxsz + \
+ decode_getattr_maxsz)
const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
@@ -1817,6 +1835,23 @@ static void encode_reclaim_complete(struct xdr_stream
*xdr,
encode_op_hdr(xdr, OP_RECLAIM_COMPLETE, decode_reclaim_complete_maxsz,
hdr);
encode_uint32(xdr, args->one_fs);
}
+
+static void encode_copy(struct xdr_stream *xdr,
+ const struct nfs_copy_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ p = reserve_space(xdr, 36 + args->destination->len);
+ *p++ = cpu_to_be32(OP_COPY);
+ p = xdr_encode_hyper(p, args->src_offset);
+ p = xdr_encode_hyper(p, args->dst_offset);
+ p = xdr_encode_hyper(p, args->count);
+ *p++ = cpu_to_be32(args->flags);
+ xdr_encode_opaque(p, args->destination->name, args->destination->len);
+ hdr->nops++;
+ hdr->replen += decode_copy_maxsz;
+}
#endif /* CONFIG_NFS_V4_1 */
static void encode_sequence(struct xdr_stream *xdr,
@@ -2761,6 +2796,30 @@ static void nfs4_xdr_enc_sequence(struct rpc_rqst *req,
struct xdr_stream *xdr,
}
/*
+ * Encode a COPY request
+ */
+static int nfs4_xdr_enc_copy(struct rpc_rqst *req, __be32 *p,
+ struct nfs_copy_args *args)
+{
+ struct xdr_stream xdr;
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ xdr_init_encode(&xdr, &req->rq_snd_buf, p);
+ encode_compound_hdr(&xdr, req, &hdr);
+ encode_sequence(&xdr, &args->seq_args, &hdr);
+ encode_putfh(&xdr, args->fh, &hdr);
+ encode_savefh(&xdr, &hdr);
+ encode_putfh(&xdr, args->dir_fh, &hdr);
+ encode_copy(&xdr, args, &hdr);
+ encode_getfh(&xdr, &hdr);
+ encode_getfattr(&xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+ return 0;
+}
+
+/*
* a GET_LEASE_TIME request
*/
static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req,
@@ -4688,6 +4747,41 @@ static int decode_link(struct xdr_stream *xdr, struct
nfs4_change_info *cinfo)
return decode_change_info(xdr, cinfo);
}
+#if defined(CONFIG_NFS_V4_1)
+static int decode_copy(struct xdr_stream *xdr, struct nfs_copy_res *res)
+{
+ __be32 *p;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_COPY);
+ if (status)
+ return status;
+
+ if (status == 0) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->callback_id_length = be32_to_cpup(p);
+ if (res->callback_id_length == 1) {
+ status = decode_stateid(xdr, res->callback_id);
+ if (unlikely(status))
+ return status;
+ } else if (res->callback_id_length != 0)
+ return -EIO;
+ } else {
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &res->bytes_copied);
+ }
+
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
/*
* We create the owner, so we know a proper owner.id length is 4.
*/
@@ -7047,6 +7141,43 @@ static int nfs4_xdr_dec_free_stateid(struct rpc_rqst
*rqstp,
out:
return status;
}
+
+/*
+ * Decode COPY response
+ */
+static int nfs4_xdr_dec_copy(struct rpc_rqst *rqstp, __be32 *p,
+ struct nfs_copy_res *res)
+{
+ struct xdr_stream xdr;
+ struct compound_hdr hdr;
+ int status;
+
+ xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
+ status = decode_compound_hdr(&xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(&xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(&xdr);
+ if (status)
+ goto out;
+ status = decode_savefh(&xdr);
+ if (status != 0)
+ goto out;
+ status = decode_putfh(&xdr);
+ if (status != 0)
+ goto out;
+ status = decode_copy(&xdr, res);
+ if (status)
+ goto out;
+ status = decode_getfh(&xdr, res->fh);
+ if (status != 0)
+ goto out;
+ decode_getfattr(&xdr, res->fattr, res->server);
+out:
+ return status;
+}
#endif /* CONFIG_NFS_V4_1 */
/**
@@ -7257,6 +7388,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(BIND_CONN_TO_SESSION,
enc_bind_conn_to_session, dec_bind_conn_to_session),
PROC(DESTROY_CLIENTID, enc_destroy_clientid, dec_destroy_clientid),
+ PROC(COPY, enc_copy, dec_copy),
#endif /* CONFIG_NFS_V4_1 */
};
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 27d74a2..2f62ebb 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -986,6 +986,37 @@ nfsd4_write(struct svc_rqst *rqstp, struct
nfsd4_compound_state *cstate,
return status;
}
+/*
+ * XXX:
+ * - do something with stateids :)
+ * - implement callback results and OFFLOAD_ABORT
+ * - inter-server copies?
+ */
+static __be32
+nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+ struct nfsd4_copy *copy)
+{
+ __be32 status;
+
+ /* only support copying data to an existing file */
+ if (copy->ca_destinationlen)
+ return nfserr_inval;
+
+ if (!cstate->current_fh.fh_dentry || !cstate->save_fh.fh_dentry)
+ return nfserr_nofilehandle;
+
+ status = nfsd_copy_range(rqstp, &cstate->save_fh, copy->ca_src_offset,
+ &cstate->current_fh, copy->ca_dst_offset,
+ copy->ca_count);
+ if (status == nfs_ok)
+ copy->u.cr_bytes_copied = copy->ca_count;
+
+ /* don't support async callbacks yet */
+ copy->u.ok.cr_callback_id_length = 0;
+
+ 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
@@ -1798,6 +1829,10 @@ static struct nfsd4_operation nfsd4_ops[] = {
.op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
.op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
},
+ [OP_COPY] = {
+ .op_func = (nfsd4op_func)nfsd4_copy,
+ .op_name = "OP_COPY",
+ },
};
#ifdef NFSD_DEBUG
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 6cd86e0..d2978e9 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1445,6 +1445,26 @@ 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;
+
+ READ_BUF(32);
+ READ64(copy->ca_src_offset);
+ READ64(copy->ca_dst_offset);
+ READ64(copy->ca_count);
+ READ32(copy->ca_flags);
+ READ32(copy->ca_destinationlen);
+ READ_BUF(copy->ca_destinationlen);
+ SAVEMEM(copy->ca_destination, copy->ca_destinationlen);
+ if ((status = check_filename(copy->ca_destination,
+ copy->ca_destinationlen)))
+ return status;
+
+ DECODE_TAIL;
+}
+
+static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
return nfs_ok;
@@ -1557,6 +1577,7 @@ static nfsd4_dec nfsd41_dec_ops[] = {
[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,
+ [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
};
struct nfsd4_minorversion_ops {
@@ -3394,6 +3415,27 @@ nfsd4_encode_test_stateid(struct nfsd4_compoundres
*resp, __be32 nfserr,
}
static __be32
+nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
+ struct nfsd4_copy *copy)
+{
+ __be32 *p;
+
+ if (!nfserr) {
+ RESERVE_SPACE(4);
+ WRITE32(copy->u.ok.cr_callback_id_length);
+ ADJUST_ARGS();
+ if (copy->u.ok.cr_callback_id_length == 1)
+ nfsd4_encode_stateid(resp, copy->u.ok.cr_callback_id);
+ } else {
+ RESERVE_SPACE(8);
+ WRITE64(copy->u.cr_bytes_copied);
+ ADJUST_ARGS();
+ }
+
+ return nfserr;
+}
+
+static __be32
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
{
return nfserr;
@@ -3465,6 +3507,7 @@ 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,
+ [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
};
/*
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 84ce601..0c1b427 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -28,6 +28,8 @@
#include <asm/uaccess.h>
#include <linux/exportfs.h>
#include <linux/writeback.h>
+#include <linux/fs_struct.h>
+#include <linux/kmod.h>
#ifdef CONFIG_NFSD_V3
#include "xdr3.h"
@@ -621,6 +623,45 @@ int nfsd4_is_junction(struct dentry *dentry)
return 0;
return 1;
}
+
+__be32
+nfsd_copy_range(struct svc_rqst *rqstp, struct svc_fh *fhp_in, u64 pos_in,
+ struct svc_fh *fhp_out, u64 pos_out, u64 count)
+{
+ struct file *filp_in = NULL;
+ struct file *filp_out = NULL;
+ int err;
+
+ /* XXX verify pos and count within sane limits? */
+
+ err = nfsd_open(rqstp, fhp_in, S_IFREG, NFSD_MAY_READ, &filp_in);
+ if (err)
+ goto out;
+
+ err = nfsd_open(rqstp, fhp_out, S_IFREG, NFSD_MAY_WRITE, &filp_out);
+ if (err)
+ goto out;
+
+ err = vfs_copy_range(filp_in, pos_in, filp_out, pos_out, count);
+ /* fall back if .copy_range isn't supported */
+
+ if (!err && EX_ISSYNC(fhp_out->fh_export))
+ err = vfs_fsync_range(filp_out, pos_out, pos_out + count-1, 0);
+
+out:
+ if (filp_in)
+ nfsd_close(filp_in);
+ if (filp_out)
+ nfsd_close(filp_out);
+
+ if (err < 0)
+ err = nfserrno(err);
+ else
+ err = 0;
+
+ return err;
+}
+
#endif /* defined(CONFIG_NFSD_V4) */
#ifdef CONFIG_NFSD_V3
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index 5b58941..bbc9483 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -85,6 +85,9 @@ __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 svc_rqst *,
+ struct svc_fh *, u64,
+ struct svc_fh *, 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 3b271d2..95fd1c3 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -426,6 +426,26 @@ struct nfsd4_reclaim_complete {
u32 rca_one_fs;
};
+struct nfsd4_copy {
+ /* request */
+ u64 ca_src_offset;
+ u64 ca_dst_offset;
+ u64 ca_count;
+ u32 ca_flags;
+ u32 ca_destinationlen;
+ char * ca_destination;
+
+ /* response */
+ union {
+ struct {
+ u32 cr_callback_id_length;
+ stateid_t * cr_callback_id;
+ } ok;
+ u64 cr_bytes_copied;
+ } u;
+
+};
+
struct nfsd4_op {
int opnum;
__be32 status;
@@ -471,6 +491,7 @@ struct nfsd4_op {
struct nfsd4_reclaim_complete reclaim_complete;
struct nfsd4_test_stateid test_stateid;
struct nfsd4_free_stateid free_stateid;
+ struct nfsd4_copy copy;
} u;
struct nfs4_replay * replay;
};
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 7b8fc73..6be484e 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -100,6 +100,7 @@ enum nfs_opnum4 {
OP_WANT_DELEGATION = 56,
OP_DESTROY_CLIENTID = 57,
OP_RECLAIM_COMPLETE = 58,
+ OP_COPY = 59,
OP_ILLEGAL = 10044,
};
@@ -108,7 +109,7 @@ enum nfs_opnum4 {
Needs to be updated if more operations are defined in future.*/
#define FIRST_NFS4_OP OP_ACCESS
-#define LAST_NFS4_OP OP_RECLAIM_COMPLETE
+#define LAST_NFS4_OP OP_COPY
enum nfsstat4 {
NFS4_OK = 0,
@@ -456,6 +457,9 @@ enum {
NFSPROC4_CLNT_GETDEVICELIST,
NFSPROC4_CLNT_BIND_CONN_TO_SESSION,
NFSPROC4_CLNT_DESTROY_CLIENTID,
+
+ /* nfs42 */
+ NFSPROC4_CLNT_COPY,
};
/* nfs41 types */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 104b62f..2256e31 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1184,6 +1184,28 @@ struct nfs41_free_stateid_res {
unsigned int status;
};
+struct nfs_copy_args {
+ struct nfs_fh *fh;
+ struct nfs_fh *dir_fh;
+ u32 *bitmask;
+ __u64 src_offset;
+ __u64 dst_offset;
+ __u64 count;
+ __u32 flags;
+ const struct qstr *destination;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs_copy_res {
+ struct nfs_fh *fh;
+ struct nfs_fattr *fattr;
+ __u32 callback_id_length;
+ nfs4_stateid *callback_id;
+ __u64 bytes_copied;
+ const struct nfs_server *server;
+ struct nfs4_sequence_res seq_res;
+};
+
#else
struct pnfs_ds_commit_info {
@@ -1433,6 +1455,8 @@ struct nfs_rpc_ops {
struct nfs_server *(*create_server)(struct nfs_mount_info *, struct
nfs_subversion *);
struct nfs_server *(*clone_server)(struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *,
rpc_authflavor_t);
+ loff_t (*copy) (struct inode *, struct inode *, struct qstr *,
+ int, loff_t, loff_t, loff_t);
};
/*
--
1.7.11.7
--
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