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BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_SEVEN(0.00)[9]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:2; envelope-from=farosas@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add a multifd test for mapped-ram with passing of fds into QEMU. This is how libvirt will consume the feature. There are a couple of details to the fdset mechanism: - multifd needs two distinct file descriptors (not duplicated with dup()) so it can enable O_DIRECT only on the channels that do aligned IO. The dup() system call creates file descriptors that share status flags, of which O_DIRECT is one. - the open() access mode flags used for the fds passed into QEMU need to match the flags QEMU uses to open the file. Currently O_WRONLY for src and O_RDONLY for dst. Note that fdset code goes under _WIN32 because fd passing is not supported on Windows. Signed-off-by: Fabiano Rosas Reviewed-by: Peter Xu --- tests/qtest/migration-test.c | 101 +++++++++++++++++++++++++++++++++-- 1 file changed, 98 insertions(+), 3 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index 37017ff2d5..5ced3b90c9 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -2047,11 +2047,18 @@ static void test_precopy_file(void) #ifndef _WIN32 static void fdset_add_fds(QTestState *qts, const char *file, int flags, - int num_fds) + int num_fds, bool direct_io) { for (int i = 0; i < num_fds; i++) { int fd; +#ifdef O_DIRECT + /* only secondary channels can use direct-io */ + if (direct_io && i != 0) { + flags |= O_DIRECT; + } +#endif + fd = open(file, flags, 0660); assert(fd != -1); @@ -2065,8 +2072,8 @@ static void *file_offset_fdset_start_hook(QTestState *from, QTestState *to) { g_autofree char *file = g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FILENAME); - fdset_add_fds(from, file, O_WRONLY, 1); - fdset_add_fds(to, file, O_RDONLY, 1); + fdset_add_fds(from, file, O_WRONLY, 1, false); + fdset_add_fds(to, file, O_RDONLY, 1, false); return NULL; } @@ -2238,6 +2245,87 @@ static void test_multifd_file_mapped_ram_dio(void) test_file_common(&args, true); } +#ifndef _WIN32 +static void multifd_mapped_ram_fdset_end(QTestState *from, QTestState *to, + void *opaque) +{ + QDict *resp; + QList *fdsets; + + /* + * Remove the fdsets after migration, otherwise a second migration + * would fail due fdset reuse. + */ + qtest_qmp_assert_success(from, "{'execute': 'remove-fd', " + "'arguments': { 'fdset-id': 1}}"); + + resp = qtest_qmp(from, "{'execute': 'query-fdsets', " + "'arguments': {}}"); + g_assert(qdict_haskey(resp, "return")); + fdsets = qdict_get_qlist(resp, "return"); + g_assert(fdsets && qlist_empty(fdsets)); +} + +static void *multifd_mapped_ram_fdset_dio(QTestState *from, QTestState *to) +{ + g_autofree char *file = g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FILENAME); + + fdset_add_fds(from, file, O_WRONLY, 2, true); + fdset_add_fds(to, file, O_RDONLY, 2, true); + + migrate_multifd_mapped_ram_start(from, to); + migrate_set_parameter_bool(from, "direct-io", true); + migrate_set_parameter_bool(to, "direct-io", true); + + return NULL; +} + +static void *multifd_mapped_ram_fdset(QTestState *from, QTestState *to) +{ + g_autofree char *file = g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FILENAME); + + fdset_add_fds(from, file, O_WRONLY, 2, false); + fdset_add_fds(to, file, O_RDONLY, 2, false); + + migrate_multifd_mapped_ram_start(from, to); + + return NULL; +} + +static void test_multifd_file_mapped_ram_fdset(void) +{ + g_autofree char *uri = g_strdup_printf("file:/dev/fdset/1,offset=%d", + FILE_TEST_OFFSET); + MigrateCommon args = { + .connect_uri = uri, + .listen_uri = "defer", + .start_hook = multifd_mapped_ram_fdset, + .finish_hook = multifd_mapped_ram_fdset_end, + }; + + test_file_common(&args, true); +} + +static void test_multifd_file_mapped_ram_fdset_dio(void) +{ + g_autofree char *uri = g_strdup_printf("file:/dev/fdset/1,offset=%d", + FILE_TEST_OFFSET); + MigrateCommon args = { + .connect_uri = uri, + .listen_uri = "defer", + .start_hook = multifd_mapped_ram_fdset_dio, + .finish_hook = multifd_mapped_ram_fdset_end, + }; + + if (!probe_o_direct_support(tmpfs)) { + g_test_skip("Filesystem does not support O_DIRECT"); + return; + } + + test_file_common(&args, true); +} +#endif /* !_WIN32 */ + static void test_precopy_tcp_plain(void) { MigrateCommon args = { @@ -3648,6 +3736,13 @@ int main(int argc, char **argv) migration_test_add("/migration/multifd/file/mapped-ram/dio", test_multifd_file_mapped_ram_dio); +#ifndef _WIN32 + qtest_add_func("/migration/multifd/file/mapped-ram/fdset", + test_multifd_file_mapped_ram_fdset); + qtest_add_func("/migration/multifd/file/mapped-ram/fdset/dio", + test_multifd_file_mapped_ram_fdset_dio); +#endif + #ifdef CONFIG_GNUTLS migration_test_add("/migration/precopy/unix/tls/psk", test_precopy_unix_tls_psk);