int main(int argc, const char **argv) { rados_t cluster; rados_ioctx_t io_ctx; rbd_image_t image; srand(time(0)); assert(rados_create(&cluster, NULL) == 0); assert(rados_conf_parse_argv(cluster, argc, argv) == 0); assert(rados_conf_read_file(cluster, NULL) == 0); assert(rados_connect(cluster) == 0); if (rados_pool_lookup(cluster, TEST_POOL) != -ENOENT) { int r = rados_pool_delete(cluster, TEST_POOL); printf("rados_pool_delete returned %d\n", r); } int r = rados_pool_create(cluster, TEST_POOL); printf("rados_pool_create returned %d\n", r); assert(rados_ioctx_create(cluster, TEST_POOL, &io_ctx) == 0); test_ls(io_ctx, 0); test_create_and_stat(io_ctx, TEST_IMAGE, MB_BYTES(1)); assert(rbd_open(io_ctx, TEST_IMAGE, &image, NULL) == 0); test_ls(io_ctx, 1, TEST_IMAGE); test_ls_snaps(image, 0); test_create_snap(image, TEST_SNAP); test_ls_snaps(image, 1, TEST_SNAP, MB_BYTES(1)); test_resize_and_stat(image, MB_BYTES(2)); test_io(io_ctx, image); test_create_snap(image, TEST_SNAP "1"); test_ls_snaps(image, 2, TEST_SNAP, MB_BYTES(1), TEST_SNAP "1", MB_BYTES(2)); test_delete_snap(image, TEST_SNAP); test_ls_snaps(image, 1, TEST_SNAP "1", MB_BYTES(2)); test_delete_snap(image, TEST_SNAP "1"); test_ls_snaps(image, 0); test_io_to_snapshot(io_ctx, image, MB_BYTES(2)); assert(rbd_close(image) == 0); test_create_and_stat(io_ctx, TEST_IMAGE "1", MB_BYTES(2)); test_ls(io_ctx, 2, TEST_IMAGE, TEST_IMAGE "1"); test_delete(io_ctx, TEST_IMAGE); test_ls(io_ctx, 1, TEST_IMAGE "1"); test_delete(io_ctx, TEST_IMAGE "1"); test_ls(io_ctx, 0); rados_ioctx_destroy(io_ctx); rados_shutdown(cluster); return 0; }
int create_image() { int r; int order = 0; r = rados_create(&cluster, NULL); if (r < 0) { simple_err("Could not create cluster handle", r); return r; } rados_conf_parse_env(cluster, NULL); r = rados_conf_read_file(cluster, NULL); if (r < 0) { simple_err("Error reading ceph config file", r); goto failed_shutdown; } r = rados_connect(cluster); if (r < 0) { simple_err("Error connecting to cluster", r); goto failed_shutdown; } r = krbd_create_from_context(rados_cct(cluster), &krbd); if (r < 0) { simple_err("Could not create libkrbd handle", r); goto failed_shutdown; } r = rados_pool_create(cluster, pool); if (r < 0 && r != -EEXIST) { simple_err("Error creating pool", r); goto failed_krbd; } r = rados_ioctx_create(cluster, pool, &ioctx); if (r < 0) { simple_err("Error creating ioctx", r); goto failed_krbd; } if (clone_calls) { r = rbd_create2(ioctx, iname, 0, RBD_FEATURE_LAYERING, &order); } else { r = rbd_create(ioctx, iname, 0, &order); } if (r < 0) { simple_err("Error creating image", r); goto failed_open; } return 0; failed_open: rados_ioctx_destroy(ioctx); failed_krbd: krbd_destroy(krbd); failed_shutdown: rados_shutdown(cluster); return r; }
static VALUE rb_rados_cluster_pool_create(VALUE self, VALUE pool_name) { GET_CLUSTER(self); int err; Check_Type(pool_name, T_STRING); char *cpool_name = StringValuePtr(pool_name); err = rados_pool_create(*wrapper->cluster, cpool_name); if (err < 0) { rb_raise(rb_const_get(mRados, rb_intern("PoolError")), "error creating pool '%s': %s", cpool_name, strerror(-err)); } return Qtrue; }
int create_image() { int r; rados_t cluster; int order = 0; r = rados_create(&cluster, NULL); if (r < 0) { simple_err("Could not create cluster handle", r); return r; } rados_conf_parse_env(cluster, NULL); r = rados_conf_read_file(cluster, NULL); if (r < 0) { simple_err("Error reading ceph config file", r); goto failed_shutdown; } r = rados_connect(cluster); if (r < 0) { simple_err("Error connecting to cluster", r); goto failed_shutdown; } r = rados_pool_create(cluster, pool); if (r < 0 && r != -EEXIST) { simple_err("Error creating pool", r); goto failed_shutdown; } r = rados_ioctx_create(cluster, pool, &ioctx); if (r < 0) { simple_err("Error creating ioctx", r); goto failed_shutdown; } r = rbd_create(ioctx, iname, 0, &order); if (r < 0) { simple_err("Error creating image", r); goto failed_open; } return 0; failed_open: rados_ioctx_destroy(ioctx); failed_shutdown: rados_shutdown(cluster); return r; }
ERL_NIF_TERM x_pool_create(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) { uint64_t id; char pool_name[MAX_NAME_LEN]; if (!enif_get_uint64(env, argv[0], &id) || !enif_get_string(env, argv[1], pool_name, MAX_NAME_LEN, ERL_NIF_LATIN1)) { return enif_make_badarg(env); } rados_t cluster = map_cluster_get(id); if (cluster == NULL) { return enif_make_badarg(env); } int err = rados_pool_create(cluster, pool_name); if (err < 0) { return make_error_tuple(env, -err); } return enif_make_atom(env, "ok"); }
static int testrados(void) { char tmp[32]; int i, r; rados_t cl; if (rados_create(&cl, NULL) < 0) { printf("error initializing\n"); return 1; } if (rados_conf_read_file(cl, NULL)) { printf("error reading configuration file\n"); return 1; } // Try to set a configuration option that doesn't exist. // This should fail. if (!rados_conf_set(cl, "config option that doesn't exist", "some random value")) { printf("error: succeeded in setting nonexistent config option\n"); return 1; } if (rados_conf_get(cl, "log to stderr", tmp, sizeof(tmp))) { printf("error: failed to read log_to_stderr from config\n"); return 1; } // Can we change it? if (rados_conf_set(cl, "log to stderr", "2")) { printf("error: error setting log_to_stderr\n"); return 1; } if (rados_conf_get(cl, "log to stderr", tmp, sizeof(tmp))) { printf("error: failed to read log_to_stderr from config\n"); return 1; } if (tmp[0] != '2') { printf("error: new setting for log_to_stderr failed to take effect.\n"); return 1; } if (rados_connect(cl)) { printf("error connecting\n"); return 1; } if (rados_connect(cl) == 0) { printf("second connect attempt didn't return an error\n"); return 1; } /* create an io_ctx */ r = rados_pool_create(cl, "foo"); printf("rados_pool_create = %d\n", r); rados_ioctx_t io_ctx; r = rados_ioctx_create(cl, "foo", &io_ctx); printf("rados_ioctx_create = %d, io_ctx = %p\n", r, io_ctx); /* list all pools */ { int buf_sz = rados_pool_list(cl, NULL, 0); printf("need buffer size of %d\n", buf_sz); char buf[buf_sz]; int r = rados_pool_list(cl, buf, buf_sz); if (r != buf_sz) { printf("buffer size mismatch: got %d the first time, but %d " "the second.\n", buf_sz, r); return 1; } const char *b = buf; printf("begin pools.\n"); while (1) { if (b[0] == '\0') break; printf(" pool: '%s'\n", b); b += strlen(b) + 1; }; printf("end pools.\n"); } /* stat */ struct rados_pool_stat_t st; r = rados_ioctx_pool_stat(io_ctx, &st); printf("rados_ioctx_pool_stat = %d, %lld KB, %lld objects\n", r, (long long)st.num_kb, (long long)st.num_objects); /* snapshots */ r = rados_ioctx_snap_create(io_ctx, "snap1"); printf("rados_ioctx_snap_create snap1 = %d\n", r); rados_snap_t snaps[10]; r = rados_ioctx_snap_list(io_ctx, snaps, 10); for (i=0; i<r; i++) { char name[100]; rados_ioctx_snap_get_name(io_ctx, snaps[i], name, sizeof(name)); printf("rados_ioctx_snap_list got snap %lld %s\n", (long long)snaps[i], name); } rados_snap_t snapid; r = rados_ioctx_snap_lookup(io_ctx, "snap1", &snapid); printf("rados_ioctx_snap_lookup snap1 got %lld, result %d\n", (long long)snapid, r); r = rados_ioctx_snap_remove(io_ctx, "snap1"); printf("rados_ioctx_snap_remove snap1 = %d\n", r); /* sync io */ time_t tm; char buf[128], buf2[128]; time(&tm); snprintf(buf, 128, "%s", ctime(&tm)); const char *oid = "foo_object"; r = rados_write(io_ctx, oid, buf, strlen(buf) + 1, 0); printf("rados_write = %d\n", r); r = rados_read(io_ctx, oid, buf2, sizeof(buf2), 0); printf("rados_read = %d\n", r); if (memcmp(buf, buf2, r)) printf("*** content mismatch ***\n"); /* attrs */ if (do_rados_setxattr(io_ctx, oid, "b", "2")) return 1; if (do_rados_setxattr(io_ctx, oid, "a", "1")) return 1; if (do_rados_setxattr(io_ctx, oid, "c", "3")) return 1; if (do_rados_getxattr(io_ctx, oid, "a", "1")) return 1; if (do_rados_getxattr(io_ctx, oid, "b", "2")) return 1; if (do_rados_getxattr(io_ctx, oid, "c", "3")) return 1; const char *exkeys[] = { "a", "b", "c", NULL }; const char *exvals[] = { "1", "2", "3", NULL }; if (do_rados_getxattrs(io_ctx, oid, exkeys, exvals)) return 1; uint64_t size; time_t mtime; r = rados_stat(io_ctx, oid, &size, &mtime); printf("rados_stat size = %lld mtime = %d = %d\n", (long long)size, (int)mtime, r); r = rados_stat(io_ctx, "does_not_exist", NULL, NULL); printf("rados_stat(does_not_exist) = %d\n", r); /* exec */ rados_exec(io_ctx, oid, "crypto", "md5", buf, strlen(buf) + 1, buf, 128); printf("exec result=%s\n", buf); r = rados_read(io_ctx, oid, buf2, 128, 0); printf("read result=%s\n", buf2); printf("size=%d\n", r); /* aio */ rados_completion_t a, b; rados_aio_create_completion(0, 0, 0, &a); rados_aio_create_completion(0, 0, 0, &b); rados_aio_write(io_ctx, "a", a, buf, 100, 0); rados_aio_write(io_ctx, "../b/bb_bb_bb\\foo\\bar", b, buf, 100, 0); rados_aio_wait_for_safe(a); printf("a safe\n"); rados_aio_wait_for_safe(b); printf("b safe\n"); rados_aio_release(a); rados_aio_release(b); /* test flush */ printf("testing aio flush\n"); rados_completion_t c; rados_aio_create_completion(0, 0, 0, &c); rados_aio_write(io_ctx, "c", c, buf, 100, 0); int safe = rados_aio_is_safe(c); printf("a should not yet be safe and ... %s\n", safe ? "is":"is not"); assert(!safe); rados_aio_flush(io_ctx); safe = rados_aio_is_safe(c); printf("a should be safe and ... %s\n", safe ? "is":"is not"); assert(safe); rados_aio_release(c); rados_read(io_ctx, "../b/bb_bb_bb\\foo\\bar", buf2, 128, 0); /* list objects */ rados_list_ctx_t h; r = rados_objects_list_open(io_ctx, &h); printf("rados_list_objects_open = %d, h = %p\n", r, h); const char *poolname; while (rados_objects_list_next(h, &poolname) == 0) printf("rados_list_objects_next got object '%s'\n", poolname); rados_objects_list_close(h); /* stat */ r = rados_ioctx_pool_stat(io_ctx, &st); printf("rados_stat_pool = %d, %lld KB, %lld objects\n", r, (long long)st.num_kb, (long long)st.num_objects); /* delete a pool */ printf("rados_delete_pool = %d\n", r); rados_ioctx_destroy(io_ctx); r = rados_pool_delete(cl, "foo"); printf("rados_ioctx_pool_delete = %d\n", r); rados_shutdown(cl); return 0; }
static int uwsgi_rados_request(struct wsgi_request *wsgi_req) { char filename[PATH_MAX+1]; if (!wsgi_req->len) { uwsgi_log( "Empty request. skip.\n"); return -1; } if (uwsgi_parse_vars(wsgi_req)) { return -1; } // blocks empty paths if (wsgi_req->path_info_len == 0 || wsgi_req->path_info_len > PATH_MAX) { uwsgi_403(wsgi_req); return UWSGI_OK; } wsgi_req->app_id = uwsgi_get_app_id(wsgi_req, wsgi_req->appid, wsgi_req->appid_len, rados_plugin.modifier1); if (wsgi_req->app_id == -1 && !uwsgi.no_default_app && uwsgi.default_app > -1) { if (uwsgi_apps[uwsgi.default_app].modifier1 == rados_plugin.modifier1) { wsgi_req->app_id = uwsgi.default_app; } } if (wsgi_req->app_id == -1) { uwsgi_404(wsgi_req); return UWSGI_OK; } struct uwsgi_app *ua = &uwsgi_apps[wsgi_req->app_id]; if (wsgi_req->path_info_len > ua->mountpoint_len && memcmp(wsgi_req->path_info, ua->mountpoint, ua->mountpoint_len) == 0) { memcpy(filename, wsgi_req->path_info+ua->mountpoint_len, wsgi_req->path_info_len-ua->mountpoint_len); filename[wsgi_req->path_info_len-ua->mountpoint_len] = 0; } else { memcpy(filename, wsgi_req->path_info, wsgi_req->path_info_len); filename[wsgi_req->path_info_len] = 0; } // in multithread mode the memory is different (as we need a ctx for each thread) !!! rados_ioctx_t ctx; if (uwsgi.threads > 1) { rados_ioctx_t *ctxes = (rados_ioctx_t *) ua->responder0; ctx = ctxes[wsgi_req->async_id]; } else { ctx = (rados_ioctx_t) ua->responder0; } struct uwsgi_rados_mountpoint *urmp = (struct uwsgi_rados_mountpoint *) ua->responder1; uint64_t stat_size = 0; time_t stat_mtime = 0; struct uwsgi_rados_io *urio = &urados.urio[wsgi_req->async_id]; if (uwsgi.async > 0) { // no need to lock here (the rid protect us) if (pipe(urio->fds)) { uwsgi_error("uwsgi_rados_read_async()/pipe()"); uwsgi_500(wsgi_req); return UWSGI_OK; } } int ret = -1; int timeout = urmp->timeout ? urmp->timeout : urados.timeout; if (!uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "OPTIONS", 7)) { if (uwsgi_response_prepare_headers(wsgi_req, "200 OK", 6)) goto end; if (uwsgi_response_add_header(wsgi_req, "Dav", 3, "1", 1)) goto end; struct uwsgi_buffer *ub_allow = uwsgi_buffer_new(64); if (uwsgi_buffer_append(ub_allow, "OPTIONS, GET, HEAD", 18)) { uwsgi_buffer_destroy(ub_allow); goto end; } if (urmp->allow_put) { if (uwsgi_buffer_append(ub_allow, ", PUT", 5)) { uwsgi_buffer_destroy(ub_allow); goto end; } } if (urmp->allow_delete) { if (uwsgi_buffer_append(ub_allow, ", DELETE", 8)) { uwsgi_buffer_destroy(ub_allow); goto end; } } if (urmp->allow_mkcol) { if (uwsgi_buffer_append(ub_allow, ", MKCOL", 7)) { uwsgi_buffer_destroy(ub_allow); goto end; } } if (urmp->allow_propfind) { if (uwsgi_buffer_append(ub_allow, ", PROPFIND", 10)) { uwsgi_buffer_destroy(ub_allow); goto end; } } uwsgi_response_add_header(wsgi_req, "Allow", 5, ub_allow->buf, ub_allow->pos); uwsgi_buffer_destroy(ub_allow); goto end; } // empty paths are mapped to propfind if (wsgi_req->path_info_len == 1 && wsgi_req->path_info[0] == '/') { if (urmp->allow_propfind && !uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "PROPFIND", 8)) { uwsgi_rados_propfind(wsgi_req, ctx, NULL, 0, 0, timeout); goto end; } uwsgi_405(wsgi_req); goto end; } // MKCOL does not require stat if (!uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "MKCOL", 5)) { if (!urmp->allow_mkcol) { uwsgi_405(wsgi_req); goto end; } ret = rados_pool_create(urmp->cluster, filename); if (ret < 0) { if (ret == -EEXIST) { uwsgi_405(wsgi_req); } else { uwsgi_500(wsgi_req); } goto end; } uwsgi_response_prepare_headers(wsgi_req, "201 Created", 11); goto end; } if (uwsgi.async > 0) { ret = uwsgi_rados_async_stat(urio, ctx, filename, &stat_size, &stat_mtime, timeout); } else { ret = rados_stat(ctx, filename, &stat_size, &stat_mtime); } // PUT AND MKCOL can be used for non-existent objects if (!uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "PUT", 3)) { if (!urmp->allow_put) { uwsgi_405(wsgi_req); goto end; } if (ret == 0) { if (uwsgi_rados_delete(wsgi_req, ctx, filename, timeout)) { uwsgi_500(wsgi_req); goto end; } } if (uwsgi_rados_put(wsgi_req, ctx, filename, urmp->put_buffer_size, timeout)) { uwsgi_500(wsgi_req); goto end; } uwsgi_response_prepare_headers(wsgi_req, "201 Created", 11); goto end; } else if (ret < 0) { if (ret == -ENOENT) uwsgi_404(wsgi_req); else uwsgi_403(wsgi_req); goto end; } if (!uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "DELETE", 6)) { if (!urmp->allow_delete) { uwsgi_405(wsgi_req); goto end; } if (uwsgi_rados_delete(wsgi_req, ctx, filename, timeout)) { uwsgi_403(wsgi_req); goto end; } uwsgi_response_prepare_headers(wsgi_req, "200 OK", 6); goto end; } if (!uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "PROPFIND", 8)) { if (!urmp->allow_propfind) { uwsgi_405(wsgi_req); goto end; } uwsgi_rados_propfind(wsgi_req, ctx, filename, stat_size, stat_mtime, timeout); goto end; } if (uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "HEAD", 4) && uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "GET", 3)) { uwsgi_405(wsgi_req); goto end; } uint64_t offset = 0; uint64_t remains = stat_size; uwsgi_request_fix_range_for_size(wsgi_req, remains); switch (wsgi_req->range_parsed) { case UWSGI_RANGE_INVALID: if (uwsgi_response_prepare_headers(wsgi_req, "416 Requested Range Not Satisfiable", 35)) goto end; if (uwsgi_response_add_content_range(wsgi_req, -1, -1, stat_size)) goto end; return 0; case UWSGI_RANGE_VALID: offset = wsgi_req->range_from; remains = wsgi_req->range_to - wsgi_req->range_from + 1; if (uwsgi_response_prepare_headers(wsgi_req, "206 Partial Content", 19)) goto end; break; default: /* UWSGI_RANGE_NOT_PARSED */ if (uwsgi_response_prepare_headers(wsgi_req, "200 OK", 6)) return -1; } size_t mime_type_len = 0; char *mime_type = uwsgi_get_mime_type(wsgi_req->path_info, wsgi_req->path_info_len, &mime_type_len); if (mime_type) { if (uwsgi_response_add_content_type(wsgi_req, mime_type, mime_type_len)) goto end; } if (uwsgi_response_add_last_modified(wsgi_req, (uint64_t) stat_mtime)) goto end; // set Content-Length to actual result size if (uwsgi_response_add_content_length(wsgi_req, remains)) goto end; if (wsgi_req->range_parsed == UWSGI_RANGE_VALID) { // here use the original size !!! if (uwsgi_response_add_content_range(wsgi_req, wsgi_req->range_from, wsgi_req->range_to, stat_size)) goto end; } // skip body on HEAD if (uwsgi_strncmp(wsgi_req->method, wsgi_req->method_len, "HEAD", 4)) { if (uwsgi.async > 0) { if (uwsgi_rados_read_async(wsgi_req, ctx, filename, offset, remains, urmp->buffer_size, timeout)) goto end; } else { if (uwsgi_rados_read_sync(wsgi_req, ctx, filename, offset, remains, urmp->buffer_size)) goto end; } } end: if (uwsgi.async > 0) { close(urio->fds[0]); close(urio->fds[1]); } return UWSGI_OK; }
int main(int argc, const char **argv) { int ret = 0; // we will use all of these below const char *pool_name = "hello_world_pool"; const char* hello = "hello world!"; const char* object_name = "hello_object"; rados_ioctx_t io_ctx = NULL; int pool_created = 0; // first, we create a Rados object and initialize it rados_t rados = NULL; { ret = rados_create(&rados, "admin"); // just use the client.admin keyring if (ret < 0) { // let's handle any error that might have come back printf("couldn't initialize rados! error %d\n", ret); ret = EXIT_FAILURE; goto out; } else { printf("we just set up a rados cluster object\n"); } } /* * Now we need to get the rados object its config info. It can * parse argv for us to find the id, monitors, etc, so let's just * use that. */ { ret = rados_conf_parse_argv(rados, argc, argv); if (ret < 0) { // This really can't happen, but we need to check to be a good citizen. printf("failed to parse config options! error %d\n", ret); ret = EXIT_FAILURE; goto out; } else { printf("we just parsed our config options\n"); // We also want to apply the config file if the user specified // one, and conf_parse_argv won't do that for us. int i; for (i = 0; i < argc; ++i) { if ((strcmp(argv[i], "-c") == 0) || (strcmp(argv[i], "--conf") == 0)) { ret = rados_conf_read_file(rados, argv[i+1]); if (ret < 0) { // This could fail if the config file is malformed, but it'd be hard. printf("failed to parse config file %s! error %d\n", argv[i+1], ret); ret = EXIT_FAILURE; goto out; } break; } } } } /* * next, we actually connect to the cluster */ { ret = rados_connect(rados); if (ret < 0) { printf("couldn't connect to cluster! error %d\n", ret); ret = EXIT_FAILURE; goto out; } else { printf("we just connected to the rados cluster\n"); } } /* * let's create our own pool instead of scribbling over real data. * Note that this command creates pools with default PG counts specified * by the monitors, which may not be appropriate for real use -- it's fine * for testing, though. */ { ret = rados_pool_create(rados, pool_name); if (ret < 0) { printf("couldn't create pool! error %d\n", ret); return EXIT_FAILURE; } else { printf("we just created a new pool named %s\n", pool_name); } pool_created = 1; } /* * create an "IoCtx" which is used to do IO to a pool */ { ret = rados_ioctx_create(rados, pool_name, &io_ctx); if (ret < 0) { printf("couldn't set up ioctx! error %d\n", ret); ret = EXIT_FAILURE; goto out; } else { printf("we just created an ioctx for our pool\n"); } } /* * now let's do some IO to the pool! We'll write "hello world!" to a * new object. */ { /* * now that we have the data to write, let's send it to an object. * We'll use the synchronous interface for simplicity. */ ret = rados_write_full(io_ctx, object_name, hello, strlen(hello)); if (ret < 0) { printf("couldn't write object! error %d\n", ret); ret = EXIT_FAILURE; goto out; } else { printf("we just wrote new object %s, with contents '%s'\n", object_name, hello); } } /* * now let's read that object back! Just for fun, we'll do it using * async IO instead of synchronous. (This would be more useful if we * wanted to send off multiple reads at once; see * http://ceph.com/docs/master/rados/api/librados/#asychronous-io ) */ { int read_len = 4194304; // this is way more than we need char* read_buf = malloc(read_len + 1); // add one for the terminating 0 we'll add later if (!read_buf) { printf("couldn't allocate read buffer\n"); ret = EXIT_FAILURE; goto out; } // allocate the completion from librados rados_completion_t read_completion; ret = rados_aio_create_completion(NULL, NULL, NULL, &read_completion); if (ret < 0) { printf("couldn't create completion! error %d\n", ret); ret = EXIT_FAILURE; free(read_buf); goto out; } else { printf("we just created a new completion\n"); } // send off the request. ret = rados_aio_read(io_ctx, object_name, read_completion, read_buf, read_len, 0); if (ret < 0) { printf("couldn't start read object! error %d\n", ret); ret = EXIT_FAILURE; free(read_buf); rados_aio_release(read_completion); goto out; } // wait for the request to complete, and check that it succeeded. rados_aio_wait_for_complete(read_completion); ret = rados_aio_get_return_value(read_completion); if (ret < 0) { printf("couldn't read object! error %d\n", ret); ret = EXIT_FAILURE; free(read_buf); rados_aio_release(read_completion); goto out; } else { read_buf[ret] = 0; // null-terminate the string printf("we read our object %s, and got back %d bytes with contents\n%s\n", object_name, ret, read_buf); } free(read_buf); rados_aio_release(read_completion); } /* * We can also use xattrs that go alongside the object. */ { const char* version = "1"; ret = rados_setxattr(io_ctx, object_name, "version", version, strlen(version)); if (ret < 0) { printf("failed to set xattr version entry! error %d\n", ret); ret = EXIT_FAILURE; goto out; } else { printf("we set the xattr 'version' on our object!\n"); } } /* * And if we want to be really cool, we can do multiple things in a single * atomic operation. For instance, we can update the contents of our object * and set the version at the same time. */ { const char* content = "v2"; rados_write_op_t write_op = rados_create_write_op(); if (!write_op) { printf("failed to allocate write op\n"); ret = EXIT_FAILURE; goto out; } rados_write_op_write_full(write_op, content, strlen(content)); const char* version = "2"; rados_write_op_setxattr(write_op, "version", version, strlen(version)); ret = rados_write_op_operate(write_op, io_ctx, object_name, NULL, 0); if (ret < 0) { printf("failed to do compound write! error %d\n", ret); ret = EXIT_FAILURE; rados_release_write_op(write_op); goto out; } else { printf("we overwrote our object %s with contents\n%s\n", object_name, content); } rados_release_write_op(write_op); } /* * And to be even cooler, we can make sure that the object looks the * way we expect before doing the write! Notice how this attempt fails * because the xattr differs. */ { rados_write_op_t failed_write_op = rados_create_write_op(); if (!failed_write_op) { printf("failed to allocate write op\n"); ret = EXIT_FAILURE; goto out; } const char* content = "v2"; const char* version = "2"; const char* old_version = "1"; rados_write_op_cmpxattr(failed_write_op, "version", LIBRADOS_CMPXATTR_OP_EQ, old_version, strlen(old_version)); rados_write_op_write_full(failed_write_op, content, strlen(content)); rados_write_op_setxattr(failed_write_op, "version", version, strlen(version)); ret = rados_write_op_operate(failed_write_op, io_ctx, object_name, NULL, 0); if (ret < 0) { printf("we just failed a write because the xattr wasn't as specified\n"); } else { printf("we succeeded on writing despite an xattr comparison mismatch!\n"); ret = EXIT_FAILURE; rados_release_write_op(failed_write_op); goto out; } rados_release_write_op(failed_write_op); /* * Now let's do the update with the correct xattr values so it * actually goes through */ content = "v3"; old_version = "2"; version = "3"; rados_write_op_t update_op = rados_create_write_op(); if (!failed_write_op) { printf("failed to allocate write op\n"); ret = EXIT_FAILURE; goto out; } rados_write_op_cmpxattr(update_op, "version", LIBRADOS_CMPXATTR_OP_EQ, old_version, strlen(old_version)); rados_write_op_write_full(update_op, content, strlen(content)); rados_write_op_setxattr(update_op, "version", version, strlen(version)); ret = rados_write_op_operate(update_op, io_ctx, object_name, NULL, 0); if (ret < 0) { printf("failed to do a compound write update! error %d\n", ret); ret = EXIT_FAILURE; rados_release_write_op(update_op); goto out; } else { printf("we overwrote our object %s following an xattr test with contents\n%s\n", object_name, content); } rados_release_write_op(update_op); } ret = EXIT_SUCCESS; out: if (io_ctx) { rados_ioctx_destroy(io_ctx); } if (pool_created) { /* * And now we're done, so let's remove our pool and then * shut down the connection gracefully. */ int delete_ret = rados_pool_delete(rados, pool_name); if (delete_ret < 0) { // be careful not to printf("We failed to delete our test pool!\n"); ret = EXIT_FAILURE; } } rados_shutdown(rados); return ret; }