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dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=RPVpaMpQ DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1716491157; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fmpEEye7ycGf1aJ3oDklUvl3X7zM1pah4teZ4b0oRJc=; b=OlEPem0r2UOVAodlgajALjtwDrfgVXPm/mdVWyARZtJUmQ1e8xgCEPBFrW6GeR1n5IHjo4 SpKXa6nmKlG8tpJAZcg+Tr8ymnqu+I2XD4/jJdNVPUE3FiFxBGjKs6fNmLUaCrfNakjxtp GKEgEW6jJh1WBFQ178609F3BYQFAgHI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1716491157; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fmpEEye7ycGf1aJ3oDklUvl3X7zM1pah4teZ4b0oRJc=; b=RPVpaMpQpuom+LTLSsEgID1JKFS56fPAqqqluEE5Kx42AkfYN8EHFuhPYkwh+VFKx1fkib 5R9mPQDFYysKCyDA== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: berrange@redhat.com, armbru@redhat.com, Peter Xu , Claudio Fontana , Jim Fehlig , Thomas Huth , Laurent Vivier , Paolo Bonzini Subject: [PATCH v2 02/18] tests/qtest/migration: Fix file migration offset check Date: Thu, 23 May 2024 16:05:32 -0300 Message-Id: <20240523190548.23977-3-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240523190548.23977-1-farosas@suse.de> References: <20240523190548.23977-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -3.01 X-Rspamd-Action: no action X-Rspamd-Queue-Id: CF08B22B73 X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-3.01 / 50.00]; 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envelope-from=farosas@suse.de; helo=smtp-out1.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.de) (identity @suse.de) X-ZM-MESSAGEID: 1716491236032100001 Content-Type: text/plain; charset="utf-8" When doing file migration, QEMU accepts an offset that should be skipped when writing the migration stream to the file. The purpose of the offset is to allow the management layer to put its own metadata at the start of the file. We have tests for this in migration-test, but only testing that the migration stream starts at the correct offset and not that it actually leaves the data intact. Unsurprisingly, there's been a bug in that area that the tests didn't catch. Fix the tests to write some data to the offset region and check that it's actually there after the migration. While here, switch to using g_get_file_contents() which is more portable than mmap(). Signed-off-by: Fabiano Rosas Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Peter Xu --- tests/qtest/migration-test.c | 79 ++++++++++++++++++++++-------------- 1 file changed, 48 insertions(+), 31 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index b7e3406471..ec905543cf 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -67,6 +67,7 @@ static QTestMigrationState dst_state; #define QEMU_VM_FILE_MAGIC 0x5145564d #define FILE_TEST_FILENAME "migfile" #define FILE_TEST_OFFSET 0x1000 +#define FILE_TEST_MARKER 'X' #define QEMU_ENV_SRC "QTEST_QEMU_BINARY_SRC" #define QEMU_ENV_DST "QTEST_QEMU_BINARY_DST" =20 @@ -1716,10 +1717,43 @@ finish: test_migrate_end(from, to, args->result =3D=3D MIG_TEST_SUCCEED); } =20 +static void file_dirty_offset_region(void) +{ + g_autofree char *path =3D g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FI= LENAME); + size_t size =3D FILE_TEST_OFFSET; + g_autofree char *data =3D g_new0(char, size); + + memset(data, FILE_TEST_MARKER, size); + g_assert(g_file_set_contents(path, data, size, NULL)); +} + +static void file_check_offset_region(void) +{ + g_autofree char *path =3D g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FI= LENAME); + size_t size =3D FILE_TEST_OFFSET; + g_autofree char *expected =3D g_new0(char, size); + g_autofree char *actual =3D NULL; + uint64_t *stream_start; + + /* + * Ensure the skipped offset region's data has not been touched + * and the migration stream starts at the right place. + */ + + memset(expected, FILE_TEST_MARKER, size); + + g_assert(g_file_get_contents(path, &actual, NULL, NULL)); + g_assert(!memcmp(actual, expected, size)); + + stream_start =3D (uint64_t *)(actual + size); + g_assert_cmpint(cpu_to_be64(*stream_start) >> 32, =3D=3D, QEMU_VM_FILE= _MAGIC); +} + static void test_file_common(MigrateCommon *args, bool stop_src) { QTestState *from, *to; void *data_hook =3D NULL; + bool check_offset =3D false; =20 if (test_migrate_start(&from, &to, args->listen_uri, &args->start)) { return; @@ -1732,6 +1766,16 @@ static void test_file_common(MigrateCommon *args, bo= ol stop_src) */ g_assert_false(args->live); =20 + if (g_strrstr(args->connect_uri, "offset=3D")) { + check_offset =3D true; + /* + * This comes before the start_hook because it's equivalent to + * a management application creating the file and writing to + * it so hooks should expect the file to be already present. + */ + file_dirty_offset_region(); + } + if (args->start_hook) { data_hook =3D args->start_hook(from, to); } @@ -1766,6 +1810,10 @@ static void test_file_common(MigrateCommon *args, bo= ol stop_src) =20 wait_for_serial("dest_serial"); =20 + if (check_offset) { + file_check_offset_region(); + } + finish: if (args->finish_hook) { args->finish_hook(from, to, data_hook); @@ -1965,36 +2013,6 @@ static void test_precopy_file(void) test_file_common(&args, true); } =20 -static void file_offset_finish_hook(QTestState *from, QTestState *to, - void *opaque) -{ -#if defined(__linux__) - g_autofree char *path =3D g_strdup_printf("%s/%s", tmpfs, FILE_TEST_FI= LENAME); - size_t size =3D FILE_TEST_OFFSET + sizeof(QEMU_VM_FILE_MAGIC); - uintptr_t *addr, *p; - int fd; - - fd =3D open(path, O_RDONLY); - g_assert(fd !=3D -1); - addr =3D mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0); - g_assert(addr !=3D MAP_FAILED); - - /* - * Ensure the skipped offset contains zeros and the migration - * stream starts at the right place. - */ - p =3D addr; - while (p < addr + FILE_TEST_OFFSET / sizeof(uintptr_t)) { - g_assert(*p =3D=3D 0); - p++; - } - g_assert_cmpint(cpu_to_be64(*p) >> 32, =3D=3D, QEMU_VM_FILE_MAGIC); - - munmap(addr, size); - close(fd); -#endif -} - static void test_precopy_file_offset(void) { g_autofree char *uri =3D g_strdup_printf("file:%s/%s,offset=3D%d", tmp= fs, @@ -2003,7 +2021,6 @@ static void test_precopy_file_offset(void) MigrateCommon args =3D { .connect_uri =3D uri, .listen_uri =3D "defer", - .finish_hook =3D file_offset_finish_hook, }; =20 test_file_common(&args, false); --=20 2.35.3