s3: libsmbclient: Add server-side copy support

Introduce a new operation, splice, which copies data from one SMBCFILE
to another. Implement this operation using FSCTL_SRV_COPYCHUNK_WRITE for
SMB2+ protocols and using read+write for older protocols. Since the
operation may be long running, it takes a callback which gets called
periodically to indicate progress to the application and given an
opportunity to stop it.

Signed-off-by: Ross Lagerwall <rosslagerwall@gmail.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/source3/include/libsmbclient.h b/source3/include/libsmbclient.h
index 42e41f79ef4..faaab2e3688 100644
--- a/source3/include/libsmbclient.h
+++ b/source3/include/libsmbclient.h
@@ -872,6 +872,15 @@ typedef ssize_t (*smbc_write_fn)(SMBCCTX *c,
 smbc_write_fn smbc_getFunctionWrite(SMBCCTX *c);
 void smbc_setFunctionWrite(SMBCCTX *c, smbc_write_fn fn);
 
+typedef off_t (*smbc_splice_fn)(SMBCCTX *c,
+                                SMBCFILE *srcfile,
+                                SMBCFILE *dstfile,
+                                off_t count,
+                                int (*splice_cb)(off_t n, void *priv),
+                                void *priv);
+smbc_splice_fn smbc_getFunctionSplice(SMBCCTX *c);
+void smbc_setFunctionSplice(SMBCCTX *c, smbc_splice_fn fn);
+
 typedef int (*smbc_unlink_fn)(SMBCCTX *c,
                               const char *fname);
 smbc_unlink_fn smbc_getFunctionUnlink(SMBCCTX *c);