Save rados object

[jrse]

No description provided.

[jrse]

• implement simple object storage for email object | rfc2822
• find point in code to add this functionality (rbos-file.c, dbox-file.c)

[jrse]

• sustain existing functionality (store mails to harddisk)
• save mail object defined in Define RBox-storage Mail datastructure #16
• process storage synchronously.

[jrse]

rbox_save_continue function can be used to read the mail body from instream and write it byte wise to rados.

-> however in our tests, rbox_save_continue is called twice.

[jrse]

160 off_t stream_mail_to_rados(rados_ioctx_t* ceph_io, char* guid, struct istream *instream)
161 {
162 uoff_t start_offset;
163 struct const_iovec iov;
164 const unsigned char *data;
165 ssize_t ret;
166 int offset = 0;
167 start_offset = instream->v_offset;
168 do{
169 (void)i_stream_read_data(instream, &data, &iov.iov_len,0);
170 if(iov.iov_len ==0){
171 /*all sent /
172 if(instream->stream_errno !=0){
173 return -1;
174 }
175 break;
176 }
177
178 iov.iov_base = data;
179
180 int err = rados_write(ceph_io,guid,iov.iov_base,iov.iov_len, offset);
181 if(err <0){
182 i_debug("cannot write to pool %lu",ceph_io);
183 }
184 else{
185 i_debug("wrote to pool");
186 offset +=iov.iov_len;
187 }
188 / im done ?/
189 i_stream_skip(instream,0);
190
191 }while((size_t)ret == iov.iov_len);
192
193 return (off_t)(instream->v_offset - start_offset);
194 }