That was the problem, now it's solved.
Thank you both for your time.
Keep the great work.
domingo, 3 de Novembro de 2019 às 05:18:23 UTC, Diogo Leitão escreveu:
>
> Hi
>
> I'm using FUSE + Cap'n Proto to build a distributed filesystem. Everything
> seems to be fine, but when i try get the data field, on the client side,
> using the getBuf method, i get a segmentation fault error.
>
> This is the code that i made. What am i doing wrong?
>
>
> /*
>
> * Capnp source file
>
> */
>
> interface FilesystemOps {
>
> ...
> read @16 (request :ReadRequest) -> (reply :ReadReply);
>
> ...
> }
>
>
> struct ReadRequest {
> path @0 :Text;
> size @1 :UInt64;
> offset @2 :Int64;
> }
>
> struct ReadReply {
> result @0 :Int32;
> buf @1 :Data;
> }
>
>
> /*
>
> * Client side
>
> */
>
> int FilesystemOpsClient::rpc_read(const char *path, char *buf, size_t size,
> off_t offset, struct fuse_file_info *fi) {
> std::cout << "rpc_read begin " << size << std::endl;
>
> int res;
> auto clientData = getClient();
> auto request = clientData->cap_.readRequest();
> auto builder = request.getRequest();
>
> builder.setPath(path);
> builder.setSize(size);
> builder.setOffset(offset);
>
> auto reply = request.send().wait(clientData->waitScope_).getReply();
>
> res = reply.getResult();
> if (res != -1) {
> std::memcpy(buf, reply.getBuf().begin(), res);
>
> }
>
> return res;
> }
>
>
> /*
>
> * Server side
>
> */
>
> kj::Promise<void> FilesystemOpsImpl::read(FilesystemOps::Server::ReadContext
> context) {
> int res;
> auto request = context.getParams().getRequest();
> auto reply = context.getResults().getReply();
>
> std::string path = root_path_ + request.getPath().cStr();
> size_t size = request.getSize();
> off_t offset = request.getOffset();
>
> int fd = ::open(path.c_str(), O_RDONLY);
> if (fd == -1) {
> res = -1;
> } else {
> res = pread(fd, reply.initBuf(size).begin(), size, offset);
> close(fd);
> }
>
> reply.setResult(res);
>
> return kj::READY_NOW;
> }
>
>
> Appreciate your help. Thank you.
>
>
>
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