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222 lines
5.0 KiB
222 lines
5.0 KiB
/* |
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* test-fsmonitor-client.c: client code to send commands/requests to |
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* a `git fsmonitor--daemon` daemon. |
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*/ |
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#include "test-tool.h" |
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#include "cache.h" |
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#include "parse-options.h" |
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#include "fsmonitor-ipc.h" |
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#include "thread-utils.h" |
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#include "trace2.h" |
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#ifndef HAVE_FSMONITOR_DAEMON_BACKEND |
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int cmd__fsmonitor_client(int argc, const char **argv) |
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{ |
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die("fsmonitor--daemon not available on this platform"); |
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} |
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#else |
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/* |
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* Read the `.git/index` to get the last token written to the |
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* FSMonitor Index Extension. |
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*/ |
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static const char *get_token_from_index(void) |
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{ |
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struct index_state *istate = the_repository->index; |
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if (do_read_index(istate, the_repository->index_file, 0) < 0) |
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die("unable to read index file"); |
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if (!istate->fsmonitor_last_update) |
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die("index file does not have fsmonitor extension"); |
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return istate->fsmonitor_last_update; |
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} |
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/* |
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* Send an IPC query to a `git-fsmonitor--daemon` daemon and |
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* ask for the changes since the given token or from the last |
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* token in the index extension. |
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* |
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* This will implicitly start a daemon process if necessary. The |
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* daemon process will persist after we exit. |
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*/ |
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static int do_send_query(const char *token) |
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{ |
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struct strbuf answer = STRBUF_INIT; |
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int ret; |
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if (!token || !*token) |
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token = get_token_from_index(); |
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ret = fsmonitor_ipc__send_query(token, &answer); |
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if (ret < 0) |
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die("could not query fsmonitor--daemon"); |
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write_in_full(1, answer.buf, answer.len); |
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strbuf_release(&answer); |
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return 0; |
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} |
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/* |
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* Send a "flush" command to the `git-fsmonitor--daemon` (if running) |
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* and tell it to flush its cache. |
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* |
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* This feature is primarily used by the test suite to simulate a loss of |
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* sync with the filesystem where we miss kernel events. |
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*/ |
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static int do_send_flush(void) |
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{ |
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struct strbuf answer = STRBUF_INIT; |
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int ret; |
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ret = fsmonitor_ipc__send_command("flush", &answer); |
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if (ret) |
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return ret; |
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write_in_full(1, answer.buf, answer.len); |
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strbuf_release(&answer); |
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return 0; |
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} |
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struct hammer_thread_data |
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{ |
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pthread_t pthread_id; |
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int thread_nr; |
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int nr_requests; |
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const char *token; |
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int sum_successful; |
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int sum_errors; |
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}; |
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static void *hammer_thread_proc(void *_hammer_thread_data) |
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{ |
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struct hammer_thread_data *data = _hammer_thread_data; |
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struct strbuf answer = STRBUF_INIT; |
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int k; |
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int ret; |
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trace2_thread_start("hammer"); |
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for (k = 0; k < data->nr_requests; k++) { |
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strbuf_reset(&answer); |
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ret = fsmonitor_ipc__send_query(data->token, &answer); |
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if (ret < 0) |
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data->sum_errors++; |
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else |
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data->sum_successful++; |
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} |
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strbuf_release(&answer); |
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trace2_thread_exit(); |
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return NULL; |
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} |
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/* |
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* Start a pool of client threads that will each send a series of |
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* commands to the daemon. |
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* |
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* The goal is to overload the daemon with a sustained series of |
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* concurrent requests. |
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*/ |
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static int do_hammer(const char *token, int nr_threads, int nr_requests) |
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{ |
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struct hammer_thread_data *data = NULL; |
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int k; |
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int sum_join_errors = 0; |
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int sum_commands = 0; |
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int sum_errors = 0; |
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if (!token || !*token) |
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token = get_token_from_index(); |
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if (nr_threads < 1) |
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nr_threads = 1; |
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if (nr_requests < 1) |
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nr_requests = 1; |
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CALLOC_ARRAY(data, nr_threads); |
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for (k = 0; k < nr_threads; k++) { |
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struct hammer_thread_data *p = &data[k]; |
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p->thread_nr = k; |
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p->nr_requests = nr_requests; |
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p->token = token; |
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if (pthread_create(&p->pthread_id, NULL, hammer_thread_proc, p)) { |
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warning("failed to create thread[%d] skipping remainder", k); |
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nr_threads = k; |
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break; |
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} |
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} |
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for (k = 0; k < nr_threads; k++) { |
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struct hammer_thread_data *p = &data[k]; |
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if (pthread_join(p->pthread_id, NULL)) |
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sum_join_errors++; |
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sum_commands += p->sum_successful; |
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sum_errors += p->sum_errors; |
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} |
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fprintf(stderr, "HAMMER: [threads %d][requests %d] [ok %d][err %d][join %d]\n", |
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nr_threads, nr_requests, sum_commands, sum_errors, sum_join_errors); |
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free(data); |
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/* |
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* Return an error if any of the _send_query requests failed. |
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* We don't care about thread create/join errors. |
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*/ |
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return sum_errors > 0; |
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} |
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int cmd__fsmonitor_client(int argc, const char **argv) |
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{ |
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const char *subcmd; |
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const char *token = NULL; |
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int nr_threads = 1; |
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int nr_requests = 1; |
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const char * const fsmonitor_client_usage[] = { |
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"test-tool fsmonitor-client query [<token>]", |
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"test-tool fsmonitor-client flush", |
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"test-tool fsmonitor-client hammer [<token>] [<threads>] [<requests>]", |
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NULL, |
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}; |
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struct option options[] = { |
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OPT_STRING(0, "token", &token, "token", |
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"command token to send to the server"), |
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OPT_INTEGER(0, "threads", &nr_threads, "number of client threads"), |
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OPT_INTEGER(0, "requests", &nr_requests, "number of requests per thread"), |
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OPT_END() |
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}; |
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argc = parse_options(argc, argv, NULL, options, fsmonitor_client_usage, 0); |
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if (argc != 1) |
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usage_with_options(fsmonitor_client_usage, options); |
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subcmd = argv[0]; |
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setup_git_directory(); |
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if (!strcmp(subcmd, "query")) |
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return !!do_send_query(token); |
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if (!strcmp(subcmd, "flush")) |
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return !!do_send_flush(); |
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if (!strcmp(subcmd, "hammer")) |
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return !!do_hammer(token, nr_threads, nr_requests); |
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die("Unhandled subcommand: '%s'", subcmd); |
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} |
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#endif
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