From 4f76b3d9bb1a5b16166217b46a5f50b3a7c2f5a8 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Wed, 19 Oct 2022 18:20:13 +0800 Subject: [PATCH 01/12] util/main-loop: Fix maximum number of wait objects for win32 The maximum number of wait objects for win32 should be MAXIMUM_WAIT_OBJECTS, not MAXIMUM_WAIT_OBJECTS + 1. Signed-off-by: Bin Meng Message-Id: <20221019102015.2441622-1-bmeng.cn@gmail.com> Signed-off-by: Paolo Bonzini --- util/main-loop.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/util/main-loop.c b/util/main-loop.c index f00a25451b..de38876064 100644 --- a/util/main-loop.c +++ b/util/main-loop.c @@ -363,10 +363,10 @@ void qemu_del_polling_cb(PollingFunc *func, void *opaque) /* Wait objects support */ typedef struct WaitObjects { int num; - int revents[MAXIMUM_WAIT_OBJECTS + 1]; - HANDLE events[MAXIMUM_WAIT_OBJECTS + 1]; - WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1]; - void *opaque[MAXIMUM_WAIT_OBJECTS + 1]; + int revents[MAXIMUM_WAIT_OBJECTS]; + HANDLE events[MAXIMUM_WAIT_OBJECTS]; + WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS]; + void *opaque[MAXIMUM_WAIT_OBJECTS]; } WaitObjects; static WaitObjects wait_objects = {0}; @@ -395,7 +395,7 @@ void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) if (w->events[i] == handle) { found = 1; } - if (found) { + if (found && i < (MAXIMUM_WAIT_OBJECTS - 1)) { w->events[i] = w->events[i + 1]; w->func[i] = w->func[i + 1]; w->opaque[i] = w->opaque[i + 1]; From d393b0a176068c41cc08f41c245721ed9ca91d30 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Wed, 19 Oct 2022 18:20:14 +0800 Subject: [PATCH 02/12] util/main-loop: Avoid adding the same HANDLE twice Fix the logic in qemu_add_wait_object() to avoid adding the same HANDLE twice, as the behavior is undefined when passing an array that contains same HANDLEs to WaitForMultipleObjects() API. Signed-off-by: Bin Meng Message-Id: <20221019102015.2441622-2-bmeng.cn@gmail.com> Signed-off-by: Paolo Bonzini --- include/qemu/main-loop.h | 2 ++ util/main-loop.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index aac707d073..3c9a9a982d 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -157,6 +157,8 @@ typedef void WaitObjectFunc(void *opaque); * in the main loop's calls to WaitForMultipleObjects. When the handle * is in a signaled state, QEMU will call @func. * + * If the same HANDLE is added twice, this function returns -1. + * * @handle: The Windows handle to be observed. * @func: A function to be called when @handle is in a signaled state. * @opaque: A pointer-size value that is passed to @func. diff --git a/util/main-loop.c b/util/main-loop.c index de38876064..10fa74c6e3 100644 --- a/util/main-loop.c +++ b/util/main-loop.c @@ -373,10 +373,20 @@ static WaitObjects wait_objects = {0}; int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque) { + int i; WaitObjects *w = &wait_objects; + if (w->num >= MAXIMUM_WAIT_OBJECTS) { return -1; } + + for (i = 0; i < w->num; i++) { + /* check if the same handle is added twice */ + if (w->events[i] == handle) { + return -1; + } + } + w->events[w->num] = handle; w->func[w->num] = func; w->opaque[w->num] = opaque; From e0d034bb243cf0bac2416e00af810c4ca7821762 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Wed, 19 Oct 2022 18:20:15 +0800 Subject: [PATCH 03/12] util/aio-win32: Correct the event array size in aio_poll() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit WaitForMultipleObjects() can only wait for MAXIMUM_WAIT_OBJECTS object handles. Correct the event array size in aio_poll() and add a assert() to ensure it does not cause out of bound access. Signed-off-by: Bin Meng Reviewed-by: Stefan Weil Reviewed-by: Marc-André Lureau Reviewed-by: Daniel P. Berrangé Message-Id: <20221019102015.2441622-3-bmeng.cn@gmail.com> Signed-off-by: Paolo Bonzini --- util/aio-win32.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/util/aio-win32.c b/util/aio-win32.c index 44003d645e..80cfe012ad 100644 --- a/util/aio-win32.c +++ b/util/aio-win32.c @@ -326,9 +326,9 @@ void aio_dispatch(AioContext *ctx) bool aio_poll(AioContext *ctx, bool blocking) { AioHandler *node; - HANDLE events[MAXIMUM_WAIT_OBJECTS + 1]; + HANDLE events[MAXIMUM_WAIT_OBJECTS]; bool progress, have_select_revents, first; - int count; + unsigned count; int timeout; /* @@ -369,6 +369,7 @@ bool aio_poll(AioContext *ctx, bool blocking) QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) { if (!node->deleted && node->io_notify && aio_node_check(ctx, node->is_external)) { + assert(count < MAXIMUM_WAIT_OBJECTS); events[count++] = event_notifier_get_handle(node->e); } } From 75ac231c67cdb13f0609943fab5499963858b587 Mon Sep 17 00:00:00 2001 From: TaiseiIto Date: Tue, 13 Sep 2022 12:06:00 +0000 Subject: [PATCH 04/12] gdb-xml: Fix size of EFER register on i386 architecture when debugged by GDB Before this commit, there were contradictory descriptions about size of EFER register. Line 113 says the size is 8 bytes. Line 129 says the size is 4 bytes. As a result, when GDB is debugging an OS running on QEMU, the GDB cannot read 'g' packets correctly. This 'g' packet transmits values of each registers of machine emulated by QEMU to GDB. QEMU, the packet sender, assign 4 bytes for EFER in 'g' packet based on the line 113. GDB, the packet receiver, extract 8 bytes for EFER in 'g' packet based on the line 129. Therefore, all registers located behind EFER in 'g' packet has been shifted 4 bytes in GDB. After this commit, GDB can read 'g' packets correctly. Signed-off-by: TaiseiIto Message-Id: Signed-off-by: Paolo Bonzini --- gdb-xml/i386-32bit.xml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gdb-xml/i386-32bit.xml b/gdb-xml/i386-32bit.xml index 872fcea9c2..7a66a02b67 100644 --- a/gdb-xml/i386-32bit.xml +++ b/gdb-xml/i386-32bit.xml @@ -110,7 +110,7 @@ - + From 8a0afbb2a4f7da5e6a542787ea90eb240e7ac65d Mon Sep 17 00:00:00 2001 From: Stefan Weil Date: Wed, 2 Nov 2022 21:22:58 +0100 Subject: [PATCH 05/12] Fix broken configure with -Wunused-parameter The configure script fails because it tries to compile small C programs with a main function which is declared with arguments argc and argv although those arguments are unused. Running `configure -extra-cflags=-Wunused-parameter` triggers the problem. configure for a native build does abort but shows the error in config.log. A cross build configure for Windows with Debian stable aborts with an error. Avoiding unused arguments fixes this. Signed-off-by: Stefan Weil Message-Id: <20221102202258.456359-1-sw@weilnetz.de> Signed-off-by: Paolo Bonzini --- configure | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/configure b/configure index 4275f5419f..66928692b0 100755 --- a/configure +++ b/configure @@ -1258,7 +1258,7 @@ if test "$stack_protector" != "no"; then cat > $TMPC << EOF int main(int argc, char *argv[]) { - char arr[64], *p = arr, *c = argv[0]; + char arr[64], *p = arr, *c = argv[argc - 1]; while (*c) { *p++ = *c++; } @@ -1607,7 +1607,7 @@ fi if test "$safe_stack" = "yes"; then cat > $TMPC << EOF -int main(int argc, char *argv[]) +int main(void) { #if ! __has_feature(safe_stack) #error SafeStack Disabled @@ -1629,7 +1629,7 @@ EOF fi else cat > $TMPC << EOF -int main(int argc, char *argv[]) +int main(void) { #if defined(__has_feature) #if __has_feature(safe_stack) @@ -1675,7 +1675,7 @@ static const int Z = 1; #define TAUT(X) ((X) == Z) #define PAREN(X, Y) (X == Y) #define ID(X) (X) -int main(int argc, char *argv[]) +int main(void) { int x = 0, y = 0; x = ID(x); From b5d3dac17077c4c7d9a90b4c76123ea80ac037da Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 3 Nov 2022 18:19:18 +0100 Subject: [PATCH 06/12] meson: avoid unused arguments of main() in compiler tests meson.build has one test where "main" is declared unnecessarily with argc and argv arguments, but does not use them. Because the test needs -Werror too, HAVE_BROKEN_SIZE_MAX is defined incorrectly. Fix the test and, for consistency, remove argc and argv whenever they are not needed. Signed-off-by: Paolo Bonzini --- meson.build | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/meson.build b/meson.build index 1d448272ab..cf3e517e56 100644 --- a/meson.build +++ b/meson.build @@ -2165,7 +2165,7 @@ config_host_data.set('CONFIG_SPLICE', cc.links(gnu_source_prefix + ''' config_host_data.set('HAVE_MLOCKALL', cc.links(gnu_source_prefix + ''' #include - int main(int argc, char *argv[]) { + int main(void) { return mlockall(MCL_FUTURE); }''')) @@ -2210,7 +2210,7 @@ config_host_data.set('HAVE_FSXATTR', cc.links(''' config_host_data.set('HAVE_BROKEN_SIZE_MAX', not cc.compiles(''' #include #include - int main(int argc, char *argv[]) { + int main(void) { return printf("%zu", SIZE_MAX); }''', args: ['-Werror'])) @@ -2327,7 +2327,7 @@ config_host_data.set('CONFIG_AVX2_OPT', get_option('avx2') \ __m256i x = *(__m256i *)a; return _mm256_testz_si256(x, x); } - int main(int argc, char *argv[]) { return bar(argv[0]); } + int main(int argc, char *argv[]) { return bar(argv[argc - 1]); } '''), error_message: 'AVX2 not available').allowed()) config_host_data.set('CONFIG_AVX512F_OPT', get_option('avx512f') \ @@ -2341,7 +2341,7 @@ config_host_data.set('CONFIG_AVX512F_OPT', get_option('avx512f') \ __m512i x = *(__m512i *)a; return _mm512_test_epi64_mask(x, x); } - int main(int argc, char *argv[]) { return bar(argv[0]); } + int main(int argc, char *argv[]) { return bar(argv[argc - 1]); } '''), error_message: 'AVX512F not available').allowed()) have_pvrdma = get_option('pvrdma') \ From efa3901e14a6428ef775332a6df958fb5b27af32 Mon Sep 17 00:00:00 2001 From: Stefan Weil Date: Thu, 3 Nov 2022 09:38:15 +0100 Subject: [PATCH 07/12] Add missing include statement for global xml_builtin This fixes some compiler warnings with compiler flag -Wmissing-variable-declarations (tested with clang): aarch64_be-linux-user-gdbstub-xml.c:564:19: warning: no previous extern declaration for non-static variable 'xml_builtin' [-Wmissing-variable-declarations] aarch64-linux-user-gdbstub-xml.c:564:19: warning: no previous extern declaration for non-static variable 'xml_builtin' [-Wmissing-variable-declarations] aarch64-softmmu-gdbstub-xml.c:1763:19: warning: no previous extern declaration for non-static variable 'xml_builtin' [-Wmissing-variable-declarations] Signed-off-by: Stefan Weil Signed-off-by: Paolo Bonzini --- scripts/feature_to_c.sh | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/feature_to_c.sh b/scripts/feature_to_c.sh index b1169899c1..c1f67c8f6a 100644 --- a/scripts/feature_to_c.sh +++ b/scripts/feature_to_c.sh @@ -56,6 +56,7 @@ for input; do done echo +echo '#include "exec/gdbstub.h"' echo "const char *const xml_builtin[][2] = {" for input; do From 2106106d80489fb9b10cd3ccfaec811988e797cb Mon Sep 17 00:00:00 2001 From: Claudio Fontana Date: Thu, 29 Sep 2022 11:30:31 +0200 Subject: [PATCH 08/12] module: removed unused function argument "mayfail" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit mayfail is always passed as false for every invocation throughout the program. It controls whether to printf or not to printf an error on g_module_open failure. Remove this unused argument. Signed-off-by: Claudio Fontana Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20220929093035.4231-2-cfontana@suse.de> Signed-off-by: Paolo Bonzini --- include/qemu/module.h | 8 ++++---- softmmu/qtest.c | 2 +- util/module.c | 20 +++++++++----------- 3 files changed, 14 insertions(+), 16 deletions(-) diff --git a/include/qemu/module.h b/include/qemu/module.h index bd73607104..8c012bbe03 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -61,15 +61,15 @@ typedef enum { #define fuzz_target_init(function) module_init(function, \ MODULE_INIT_FUZZ_TARGET) #define migration_init(function) module_init(function, MODULE_INIT_MIGRATION) -#define block_module_load_one(lib) module_load_one("block-", lib, false) -#define ui_module_load_one(lib) module_load_one("ui-", lib, false) -#define audio_module_load_one(lib) module_load_one("audio-", lib, false) +#define block_module_load_one(lib) module_load_one("block-", lib) +#define ui_module_load_one(lib) module_load_one("ui-", lib) +#define audio_module_load_one(lib) module_load_one("audio-", lib) void register_module_init(void (*fn)(void), module_init_type type); void register_dso_module_init(void (*fn)(void), module_init_type type); void module_call_init(module_init_type type); -bool module_load_one(const char *prefix, const char *lib_name, bool mayfail); +bool module_load_one(const char *prefix, const char *lib_name); void module_load_qom_one(const char *type); void module_load_qom_all(void); void module_allow_arch(const char *arch); diff --git a/softmmu/qtest.c b/softmmu/qtest.c index afea7693d0..ff74c5d709 100644 --- a/softmmu/qtest.c +++ b/softmmu/qtest.c @@ -756,7 +756,7 @@ static void qtest_process_command(CharBackend *chr, gchar **words) g_assert(words[1] && words[2]); qtest_send_prefix(chr); - if (module_load_one(words[1], words[2], false)) { + if (module_load_one(words[1], words[2])) { qtest_sendf(chr, "OK\n"); } else { qtest_sendf(chr, "FAIL\n"); diff --git a/util/module.c b/util/module.c index 8ddb0e18f5..8563edd626 100644 --- a/util/module.c +++ b/util/module.c @@ -144,7 +144,7 @@ static bool module_check_arch(const QemuModinfo *modinfo) return true; } -static int module_load_file(const char *fname, bool mayfail, bool export_symbols) +static int module_load_file(const char *fname, bool export_symbols) { GModule *g_module; void (*sym)(void); @@ -172,10 +172,8 @@ static int module_load_file(const char *fname, bool mayfail, bool export_symbols } g_module = g_module_open(fname, flags); if (!g_module) { - if (!mayfail) { - fprintf(stderr, "Failed to open module: %s\n", - g_module_error()); - } + fprintf(stderr, "Failed to open module: %s\n", + g_module_error()); ret = -EINVAL; goto out; } @@ -208,7 +206,7 @@ out: } #endif -bool module_load_one(const char *prefix, const char *lib_name, bool mayfail) +bool module_load_one(const char *prefix, const char *lib_name) { bool success = false; @@ -256,7 +254,7 @@ bool module_load_one(const char *prefix, const char *lib_name, bool mayfail) if (strcmp(modinfo->name, module_name) == 0) { /* we depend on other module(s) */ for (sl = modinfo->deps; *sl != NULL; sl++) { - module_load_one("", *sl, false); + module_load_one("", *sl); } } else { for (sl = modinfo->deps; *sl != NULL; sl++) { @@ -287,7 +285,7 @@ bool module_load_one(const char *prefix, const char *lib_name, bool mayfail) for (i = 0; i < n_dirs; i++) { fname = g_strdup_printf("%s/%s%s", dirs[i], module_name, CONFIG_HOST_DSOSUF); - ret = module_load_file(fname, mayfail, export_symbols); + ret = module_load_file(fname, export_symbols); g_free(fname); fname = NULL; /* Try loading until loaded a module file */ @@ -333,7 +331,7 @@ void module_load_qom_one(const char *type) } for (sl = modinfo->objs; *sl != NULL; sl++) { if (strcmp(type, *sl) == 0) { - module_load_one("", modinfo->name, false); + module_load_one("", modinfo->name); } } } @@ -354,7 +352,7 @@ void module_load_qom_all(void) if (!module_check_arch(modinfo)) { continue; } - module_load_one("", modinfo->name, false); + module_load_one("", modinfo->name); } module_loaded_qom_all = true; } @@ -370,7 +368,7 @@ void qemu_load_module_for_opts(const char *group) } for (sl = modinfo->opts; *sl != NULL; sl++) { if (strcmp(group, *sl) == 0) { - module_load_one("", modinfo->name, false); + module_load_one("", modinfo->name); } } } From dbc0e80553c067f56cb236d9de2cd0d50f3c6131 Mon Sep 17 00:00:00 2001 From: Claudio Fontana Date: Thu, 29 Sep 2022 11:30:32 +0200 Subject: [PATCH 09/12] module: rename module_load_one to module_load MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Claudio Fontana Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20220929093035.4231-3-cfontana@suse.de> Signed-off-by: Paolo Bonzini --- audio/audio.c | 2 +- block.c | 4 ++-- block/dmg.c | 4 ++-- hw/core/qdev.c | 2 +- include/qemu/module.h | 10 +++++----- qom/object.c | 4 ++-- softmmu/qtest.c | 2 +- ui/console.c | 6 +++--- util/module.c | 14 +++++++------- 9 files changed, 24 insertions(+), 24 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index cc664271eb..379f19dc89 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -80,7 +80,7 @@ audio_driver *audio_driver_lookup(const char *name) } } - audio_module_load_one(name); + audio_module_load(name); QLIST_FOREACH(d, &audio_drivers, next) { if (strcmp(name, d->name) == 0) { return d; diff --git a/block.c b/block.c index 3bd594eb2a..ddd743c447 100644 --- a/block.c +++ b/block.c @@ -464,7 +464,7 @@ BlockDriver *bdrv_find_format(const char *format_name) /* The driver isn't registered, maybe we need to load a module */ for (i = 0; i < (int)ARRAY_SIZE(block_driver_modules); ++i) { if (!strcmp(block_driver_modules[i].format_name, format_name)) { - block_module_load_one(block_driver_modules[i].library_name); + block_module_load(block_driver_modules[i].library_name); break; } } @@ -981,7 +981,7 @@ BlockDriver *bdrv_find_protocol(const char *filename, for (i = 0; i < (int)ARRAY_SIZE(block_driver_modules); ++i) { if (block_driver_modules[i].protocol_name && !strcmp(block_driver_modules[i].protocol_name, protocol)) { - block_module_load_one(block_driver_modules[i].library_name); + block_module_load(block_driver_modules[i].library_name); break; } } diff --git a/block/dmg.c b/block/dmg.c index 422136276a..b5a93b086b 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -445,8 +445,8 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags, return ret; } - block_module_load_one("dmg-bz2"); - block_module_load_one("dmg-lzfse"); + block_module_load("dmg-bz2"); + block_module_load("dmg-lzfse"); s->n_chunks = 0; s->offsets = s->lengths = s->sectors = s->sectorcounts = NULL; diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 0806d8fcaa..25dfc08468 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -148,7 +148,7 @@ bool qdev_set_parent_bus(DeviceState *dev, BusState *bus, Error **errp) DeviceState *qdev_new(const char *name) { if (!object_class_by_name(name)) { - module_load_qom_one(name); + module_load_qom(name); } return DEVICE(object_new(name)); } diff --git a/include/qemu/module.h b/include/qemu/module.h index 8c012bbe03..b7911ce791 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -61,16 +61,16 @@ typedef enum { #define fuzz_target_init(function) module_init(function, \ MODULE_INIT_FUZZ_TARGET) #define migration_init(function) module_init(function, MODULE_INIT_MIGRATION) -#define block_module_load_one(lib) module_load_one("block-", lib) -#define ui_module_load_one(lib) module_load_one("ui-", lib) -#define audio_module_load_one(lib) module_load_one("audio-", lib) +#define block_module_load(lib) module_load("block-", lib) +#define ui_module_load(lib) module_load("ui-", lib) +#define audio_module_load(lib) module_load("audio-", lib) void register_module_init(void (*fn)(void), module_init_type type); void register_dso_module_init(void (*fn)(void), module_init_type type); void module_call_init(module_init_type type); -bool module_load_one(const char *prefix, const char *lib_name); -void module_load_qom_one(const char *type); +bool module_load(const char *prefix, const char *lib_name); +void module_load_qom(const char *type); void module_load_qom_all(void); void module_allow_arch(const char *arch); diff --git a/qom/object.c b/qom/object.c index e5cef30f6d..aba942bdf3 100644 --- a/qom/object.c +++ b/qom/object.c @@ -526,7 +526,7 @@ void object_initialize(void *data, size_t size, const char *typename) #ifdef CONFIG_MODULES if (!type) { - module_load_qom_one(typename); + module_load_qom(typename); type = type_get_by_name(typename); } #endif @@ -1033,7 +1033,7 @@ ObjectClass *module_object_class_by_name(const char *typename) oc = object_class_by_name(typename); #ifdef CONFIG_MODULES if (!oc) { - module_load_qom_one(typename); + module_load_qom(typename); oc = object_class_by_name(typename); } #endif diff --git a/softmmu/qtest.c b/softmmu/qtest.c index ff74c5d709..7743545651 100644 --- a/softmmu/qtest.c +++ b/softmmu/qtest.c @@ -756,7 +756,7 @@ static void qtest_process_command(CharBackend *chr, gchar **words) g_assert(words[1] && words[2]); qtest_send_prefix(chr); - if (module_load_one(words[1], words[2])) { + if (module_load(words[1], words[2])) { qtest_sendf(chr, "OK\n"); } else { qtest_sendf(chr, "FAIL\n"); diff --git a/ui/console.c b/ui/console.c index 65c117874c..44dfb0f52b 100644 --- a/ui/console.c +++ b/ui/console.c @@ -2632,7 +2632,7 @@ bool qemu_display_find_default(DisplayOptions *opts) for (i = 0; i < (int)ARRAY_SIZE(prio); i++) { if (dpys[prio[i]] == NULL) { - ui_module_load_one(DisplayType_str(prio[i])); + ui_module_load(DisplayType_str(prio[i])); } if (dpys[prio[i]] == NULL) { continue; @@ -2650,7 +2650,7 @@ void qemu_display_early_init(DisplayOptions *opts) return; } if (dpys[opts->type] == NULL) { - ui_module_load_one(DisplayType_str(opts->type)); + ui_module_load(DisplayType_str(opts->type)); } if (dpys[opts->type] == NULL) { error_report("Display '%s' is not available.", @@ -2680,7 +2680,7 @@ void qemu_display_help(void) printf("none\n"); for (idx = DISPLAY_TYPE_NONE; idx < DISPLAY_TYPE__MAX; idx++) { if (!dpys[idx]) { - ui_module_load_one(DisplayType_str(idx)); + ui_module_load(DisplayType_str(idx)); } if (dpys[idx]) { printf("%s\n", DisplayType_str(dpys[idx]->type)); diff --git a/util/module.c b/util/module.c index 8563edd626..ad89cd50dc 100644 --- a/util/module.c +++ b/util/module.c @@ -206,7 +206,7 @@ out: } #endif -bool module_load_one(const char *prefix, const char *lib_name) +bool module_load(const char *prefix, const char *lib_name) { bool success = false; @@ -254,7 +254,7 @@ bool module_load_one(const char *prefix, const char *lib_name) if (strcmp(modinfo->name, module_name) == 0) { /* we depend on other module(s) */ for (sl = modinfo->deps; *sl != NULL; sl++) { - module_load_one("", *sl); + module_load("", *sl); } } else { for (sl = modinfo->deps; *sl != NULL; sl++) { @@ -312,7 +312,7 @@ bool module_load_one(const char *prefix, const char *lib_name) static bool module_loaded_qom_all; -void module_load_qom_one(const char *type) +void module_load_qom(const char *type) { const QemuModinfo *modinfo; const char **sl; @@ -331,7 +331,7 @@ void module_load_qom_one(const char *type) } for (sl = modinfo->objs; *sl != NULL; sl++) { if (strcmp(type, *sl) == 0) { - module_load_one("", modinfo->name); + module_load("", modinfo->name); } } } @@ -352,7 +352,7 @@ void module_load_qom_all(void) if (!module_check_arch(modinfo)) { continue; } - module_load_one("", modinfo->name); + module_load("", modinfo->name); } module_loaded_qom_all = true; } @@ -368,7 +368,7 @@ void qemu_load_module_for_opts(const char *group) } for (sl = modinfo->opts; *sl != NULL; sl++) { if (strcmp(group, *sl) == 0) { - module_load_one("", modinfo->name); + module_load("", modinfo->name); } } } @@ -378,7 +378,7 @@ void qemu_load_module_for_opts(const char *group) void module_allow_arch(const char *arch) {} void qemu_load_module_for_opts(const char *group) {} -void module_load_qom_one(const char *type) {} +void module_load_qom(const char *type) {} void module_load_qom_all(void) {} #endif From c551fb0b53db5d9a1f0116e8cce12f994605c9ea Mon Sep 17 00:00:00 2001 From: Claudio Fontana Date: Thu, 29 Sep 2022 11:30:33 +0200 Subject: [PATCH 10/12] module: add Error arguments to module_load and module_load_qom improve error handling during module load, by changing: bool module_load(const char *prefix, const char *lib_name); void module_load_qom(const char *type); to: int module_load(const char *prefix, const char *name, Error **errp); int module_load_qom(const char *type, Error **errp); where the return value is: -1 on module load error, and errp is set with the error 0 on module or one of its dependencies are not installed 1 on module load success 2 on module load success (module already loaded or built-in) module_load_qom_one has been introduced in: commit 28457744c345 ("module: qom module support"), which built on top of module_load_one, but discarded the bool return value. Restore it. Adapt all callers to emit errors, or ignore them, or fail hard, as appropriate in each context. Replace the previous emission of errors via fprintf in _some_ error conditions with Error and error_report, so as to emit to the appropriate target. A memory leak is also fixed as part of the module_load changes. audio: when attempting to load an audio module, report module load errors. Note that still for some callers, a single issue may generate multiple error reports, and this could be improved further. Regarding the audio code itself, audio_add() seems to ignore errors, and this should probably be improved. block: when attempting to load a block module, report module load errors. For the code paths that already use the Error API, take advantage of those to report module load errors into the Error parameter. For the other code paths, we currently emit the error, but this could be improved further by adding Error parameters to all possible code paths. console: when attempting to load a display module, report module load errors. qdev: when creating a new qdev Device object (DeviceState), report load errors. If a module cannot be loaded to create that device, now abort execution (if no CONFIG_MODULE) or exit (if CONFIG_MODULE). qom/object.c: when initializing a QOM object, or looking up class_by_name, report module load errors. qtest: when processing the "module_load" qtest command, report errors in the load of the module. Signed-off-by: Claudio Fontana Reviewed-by: Richard Henderson Message-Id: <20220929093035.4231-4-cfontana@suse.de> Signed-off-by: Paolo Bonzini --- audio/audio.c | 16 ++-- block.c | 20 +++- block/dmg.c | 14 ++- hw/core/qdev.c | 17 +++- include/qemu/module.h | 37 +++++++- qom/object.c | 18 +++- softmmu/qtest.c | 8 +- ui/console.c | 18 +++- util/module.c | 209 +++++++++++++++++++++++------------------- 9 files changed, 234 insertions(+), 123 deletions(-) diff --git a/audio/audio.c b/audio/audio.c index 379f19dc89..065602ce1b 100644 --- a/audio/audio.c +++ b/audio/audio.c @@ -73,20 +73,24 @@ void audio_driver_register(audio_driver *drv) audio_driver *audio_driver_lookup(const char *name) { struct audio_driver *d; + Error *local_err = NULL; + int rv; QLIST_FOREACH(d, &audio_drivers, next) { if (strcmp(name, d->name) == 0) { return d; } } - - audio_module_load(name); - QLIST_FOREACH(d, &audio_drivers, next) { - if (strcmp(name, d->name) == 0) { - return d; + rv = audio_module_load(name, &local_err); + if (rv > 0) { + QLIST_FOREACH(d, &audio_drivers, next) { + if (strcmp(name, d->name) == 0) { + return d; + } } + } else if (rv < 0) { + error_report_err(local_err); } - return NULL; } diff --git a/block.c b/block.c index ddd743c447..c5e20c0bea 100644 --- a/block.c +++ b/block.c @@ -464,12 +464,18 @@ BlockDriver *bdrv_find_format(const char *format_name) /* The driver isn't registered, maybe we need to load a module */ for (i = 0; i < (int)ARRAY_SIZE(block_driver_modules); ++i) { if (!strcmp(block_driver_modules[i].format_name, format_name)) { - block_module_load(block_driver_modules[i].library_name); + Error *local_err = NULL; + int rv = block_module_load(block_driver_modules[i].library_name, + &local_err); + if (rv > 0) { + return bdrv_do_find_format(format_name); + } else if (rv < 0) { + error_report_err(local_err); + } break; } } - - return bdrv_do_find_format(format_name); + return NULL; } static int bdrv_format_is_whitelisted(const char *format_name, bool read_only) @@ -981,12 +987,16 @@ BlockDriver *bdrv_find_protocol(const char *filename, for (i = 0; i < (int)ARRAY_SIZE(block_driver_modules); ++i) { if (block_driver_modules[i].protocol_name && !strcmp(block_driver_modules[i].protocol_name, protocol)) { - block_module_load(block_driver_modules[i].library_name); + int rv = block_module_load(block_driver_modules[i].library_name, errp); + if (rv > 0) { + drv1 = bdrv_do_find_protocol(protocol); + } else if (rv < 0) { + return NULL; + } break; } } - drv1 = bdrv_do_find_protocol(protocol); if (!drv1) { error_setg(errp, "Unknown protocol '%s'", protocol); } diff --git a/block/dmg.c b/block/dmg.c index b5a93b086b..ba8ec344d4 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -444,9 +444,17 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags, if (ret < 0) { return ret; } - - block_module_load("dmg-bz2"); - block_module_load("dmg-lzfse"); + /* + * NB: if uncompress submodules are absent, + * ie block_module_load return value == 0, the function pointers + * dmg_uncompress_bz2 and dmg_uncompress_lzfse will be NULL. + */ + if (block_module_load("dmg-bz2", errp) < 0) { + return -EINVAL; + } + if (block_module_load("dmg-lzfse", errp) < 0) { + return -EINVAL; + } s->n_chunks = 0; s->offsets = s->lengths = s->sectors = s->sectorcounts = NULL; diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 25dfc08468..0145501904 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -147,8 +147,21 @@ bool qdev_set_parent_bus(DeviceState *dev, BusState *bus, Error **errp) DeviceState *qdev_new(const char *name) { - if (!object_class_by_name(name)) { - module_load_qom(name); + ObjectClass *oc = object_class_by_name(name); +#ifdef CONFIG_MODULES + if (!oc) { + int rv = module_load_qom(name, &error_fatal); + if (rv > 0) { + oc = object_class_by_name(name); + } else { + error_report("could not find a module for type '%s'", name); + exit(1); + } + } +#endif + if (!oc) { + error_report("unknown type '%s'", name); + abort(); } return DEVICE(object_new(name)); } diff --git a/include/qemu/module.h b/include/qemu/module.h index b7911ce791..c37ce74b16 100644 --- a/include/qemu/module.h +++ b/include/qemu/module.h @@ -61,16 +61,43 @@ typedef enum { #define fuzz_target_init(function) module_init(function, \ MODULE_INIT_FUZZ_TARGET) #define migration_init(function) module_init(function, MODULE_INIT_MIGRATION) -#define block_module_load(lib) module_load("block-", lib) -#define ui_module_load(lib) module_load("ui-", lib) -#define audio_module_load(lib) module_load("audio-", lib) +#define block_module_load(lib, errp) module_load("block-", lib, errp) +#define ui_module_load(lib, errp) module_load("ui-", lib, errp) +#define audio_module_load(lib, errp) module_load("audio-", lib, errp) void register_module_init(void (*fn)(void), module_init_type type); void register_dso_module_init(void (*fn)(void), module_init_type type); void module_call_init(module_init_type type); -bool module_load(const char *prefix, const char *lib_name); -void module_load_qom(const char *type); + +/* + * module_load: attempt to load a module from a set of directories + * + * directories searched are: + * - getenv("QEMU_MODULE_DIR") + * - get_relocated_path(CONFIG_QEMU_MODDIR); + * - /var/run/qemu/${version_dir} + * + * prefix: a subsystem prefix, or the empty string ("audio-", ..., "") + * name: name of the module + * errp: error to set in case the module is found, but load failed. + * + * Return value: -1 on error (errp set if not NULL). + * 0 if module or one of its dependencies are not installed, + * 1 if the module is found and loaded, + * 2 if the module is already loaded, or module is built-in. + */ +int module_load(const char *prefix, const char *name, Error **errp); + +/* + * module_load_qom: attempt to load a module to provide a QOM type + * + * type: the type to be provided + * errp: error to set. + * + * Return value: as per module_load. + */ +int module_load_qom(const char *type, Error **errp); void module_load_qom_all(void); void module_allow_arch(const char *arch); diff --git a/qom/object.c b/qom/object.c index aba942bdf3..e25f1e96db 100644 --- a/qom/object.c +++ b/qom/object.c @@ -526,8 +526,13 @@ void object_initialize(void *data, size_t size, const char *typename) #ifdef CONFIG_MODULES if (!type) { - module_load_qom(typename); - type = type_get_by_name(typename); + int rv = module_load_qom(typename, &error_fatal); + if (rv > 0) { + type = type_get_by_name(typename); + } else { + error_report("missing object type '%s'", typename); + exit(1); + } } #endif if (!type) { @@ -1033,8 +1038,13 @@ ObjectClass *module_object_class_by_name(const char *typename) oc = object_class_by_name(typename); #ifdef CONFIG_MODULES if (!oc) { - module_load_qom(typename); - oc = object_class_by_name(typename); + Error *local_err = NULL; + int rv = module_load_qom(typename, &local_err); + if (rv > 0) { + oc = object_class_by_name(typename); + } else if (rv < 0) { + error_report_err(local_err); + } } #endif return oc; diff --git a/softmmu/qtest.c b/softmmu/qtest.c index 7743545651..d3e0ab4eda 100644 --- a/softmmu/qtest.c +++ b/softmmu/qtest.c @@ -753,12 +753,18 @@ static void qtest_process_command(CharBackend *chr, gchar **words) qtest_sendf(chr, "OK %"PRIi64"\n", (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); } else if (strcmp(words[0], "module_load") == 0) { + Error *local_err = NULL; + int rv; g_assert(words[1] && words[2]); qtest_send_prefix(chr); - if (module_load(words[1], words[2])) { + rv = module_load(words[1], words[2], &local_err); + if (rv > 0) { qtest_sendf(chr, "OK\n"); } else { + if (rv < 0) { + error_report_err(local_err); + } qtest_sendf(chr, "FAIL\n"); } } else if (qtest_enabled() && strcmp(words[0], "clock_set") == 0) { diff --git a/ui/console.c b/ui/console.c index 44dfb0f52b..3c0d9b061a 100644 --- a/ui/console.c +++ b/ui/console.c @@ -2632,7 +2632,11 @@ bool qemu_display_find_default(DisplayOptions *opts) for (i = 0; i < (int)ARRAY_SIZE(prio); i++) { if (dpys[prio[i]] == NULL) { - ui_module_load(DisplayType_str(prio[i])); + Error *local_err = NULL; + int rv = ui_module_load(DisplayType_str(prio[i]), &local_err); + if (rv < 0) { + error_report_err(local_err); + } } if (dpys[prio[i]] == NULL) { continue; @@ -2650,7 +2654,11 @@ void qemu_display_early_init(DisplayOptions *opts) return; } if (dpys[opts->type] == NULL) { - ui_module_load(DisplayType_str(opts->type)); + Error *local_err = NULL; + int rv = ui_module_load(DisplayType_str(opts->type), &local_err); + if (rv < 0) { + error_report_err(local_err); + } } if (dpys[opts->type] == NULL) { error_report("Display '%s' is not available.", @@ -2680,7 +2688,11 @@ void qemu_display_help(void) printf("none\n"); for (idx = DISPLAY_TYPE_NONE; idx < DISPLAY_TYPE__MAX; idx++) { if (!dpys[idx]) { - ui_module_load(DisplayType_str(idx)); + Error *local_err = NULL; + int rv = ui_module_load(DisplayType_str(idx), &local_err); + if (rv < 0) { + error_report_err(local_err); + } } if (dpys[idx]) { printf("%s\n", DisplayType_str(dpys[idx]->type)); diff --git a/util/module.c b/util/module.c index ad89cd50dc..32e263163c 100644 --- a/util/module.c +++ b/util/module.c @@ -21,6 +21,7 @@ #include "qemu/module.h" #include "qemu/cutils.h" #include "qemu/config-file.h" +#include "qapi/error.h" #ifdef CONFIG_MODULE_UPGRADES #include "qemu-version.h" #endif @@ -144,25 +145,22 @@ static bool module_check_arch(const QemuModinfo *modinfo) return true; } -static int module_load_file(const char *fname, bool export_symbols) +/* + * module_load_dso: attempt to load an existing dso file + * + * fname: full pathname of the file to load + * export_symbols: if true, add the symbols to the global name space + * errp: error to set. + * + * Return value: true on success, false on error, and errp will be set. + */ +static bool module_load_dso(const char *fname, bool export_symbols, + Error **errp) { GModule *g_module; void (*sym)(void); - const char *dsosuf = CONFIG_HOST_DSOSUF; - int len = strlen(fname); - int suf_len = strlen(dsosuf); ModuleEntry *e, *next; - int ret, flags; - - if (len <= suf_len || strcmp(&fname[len - suf_len], dsosuf)) { - /* wrong suffix */ - ret = -EINVAL; - goto out; - } - if (access(fname, F_OK)) { - ret = -ENOENT; - goto out; - } + int flags; assert(QTAILQ_EMPTY(&dso_init_list)); @@ -172,46 +170,38 @@ static int module_load_file(const char *fname, bool export_symbols) } g_module = g_module_open(fname, flags); if (!g_module) { - fprintf(stderr, "Failed to open module: %s\n", - g_module_error()); - ret = -EINVAL; - goto out; + error_setg(errp, "failed to open module: %s", g_module_error()); + return false; } if (!g_module_symbol(g_module, DSO_STAMP_FUN_STR, (gpointer *)&sym)) { - fprintf(stderr, "Failed to initialize module: %s\n", - fname); - /* Print some info if this is a QEMU module (but from different build), - * this will make debugging user problems easier. */ + error_setg(errp, "failed to initialize module: %s", fname); + /* + * Print some info if this is a QEMU module (but from different build), + * this will make debugging user problems easier. + */ if (g_module_symbol(g_module, "qemu_module_dummy", (gpointer *)&sym)) { - fprintf(stderr, - "Note: only modules from the same build can be loaded.\n"); + error_append_hint(errp, + "Only modules from the same build can be loaded.\n"); } g_module_close(g_module); - ret = -EINVAL; - } else { - QTAILQ_FOREACH(e, &dso_init_list, node) { - e->init(); - register_module_init(e->init, e->type); - } - ret = 0; + return false; } + QTAILQ_FOREACH(e, &dso_init_list, node) { + e->init(); + register_module_init(e->init, e->type); + } trace_module_load_module(fname); QTAILQ_FOREACH_SAFE(e, &dso_init_list, node, next) { QTAILQ_REMOVE(&dso_init_list, e, node); g_free(e); } -out: - return ret; + return true; } -#endif -bool module_load(const char *prefix, const char *lib_name) +int module_load(const char *prefix, const char *name, Error **errp) { - bool success = false; - -#ifdef CONFIG_MODULES - char *fname = NULL; + int rv = -1; #ifdef CONFIG_MODULE_UPGRADES char *version_dir; #endif @@ -219,54 +209,29 @@ bool module_load(const char *prefix, const char *lib_name) char *dirs[5]; char *module_name; int i = 0, n_dirs = 0; - int ret; bool export_symbols = false; static GHashTable *loaded_modules; const QemuModinfo *modinfo; const char **sl; if (!g_module_supported()) { - fprintf(stderr, "Module is not supported by system.\n"); - return false; + error_setg(errp, "%s", "this platform does not support GLib modules"); + return -1; } if (!loaded_modules) { loaded_modules = g_hash_table_new(g_str_hash, g_str_equal); } - module_name = g_strdup_printf("%s%s", prefix, lib_name); + /* allocate all resources managed by the out: label here */ + module_name = g_strdup_printf("%s%s", prefix, name); if (g_hash_table_contains(loaded_modules, module_name)) { g_free(module_name); - return true; + return 2; /* module already loaded */ } g_hash_table_add(loaded_modules, module_name); - for (modinfo = module_info; modinfo->name != NULL; modinfo++) { - if (modinfo->arch) { - if (strcmp(modinfo->name, module_name) == 0) { - if (!module_check_arch(modinfo)) { - return false; - } - } - } - if (modinfo->deps) { - if (strcmp(modinfo->name, module_name) == 0) { - /* we depend on other module(s) */ - for (sl = modinfo->deps; *sl != NULL; sl++) { - module_load("", *sl); - } - } else { - for (sl = modinfo->deps; *sl != NULL; sl++) { - if (strcmp(module_name, *sl) == 0) { - /* another module depends on us */ - export_symbols = true; - } - } - } - } - } - search_dir = getenv("QEMU_MODULE_DIR"); if (search_dir != NULL) { dirs[n_dirs++] = g_strdup_printf("%s", search_dir); @@ -279,46 +244,87 @@ bool module_load(const char *prefix, const char *lib_name) '_'); dirs[n_dirs++] = g_strdup_printf("/var/run/qemu/%s", version_dir); #endif - assert(n_dirs <= ARRAY_SIZE(dirs)); - for (i = 0; i < n_dirs; i++) { - fname = g_strdup_printf("%s/%s%s", - dirs[i], module_name, CONFIG_HOST_DSOSUF); - ret = module_load_file(fname, export_symbols); - g_free(fname); - fname = NULL; - /* Try loading until loaded a module file */ - if (!ret) { - success = true; - break; + /* end of resources managed by the out: label */ + + for (modinfo = module_info; modinfo->name != NULL; modinfo++) { + if (modinfo->arch) { + if (strcmp(modinfo->name, module_name) == 0) { + if (!module_check_arch(modinfo)) { + error_setg(errp, "module arch does not match: " + "expected '%s', got '%s'", module_arch, modinfo->arch); + goto out; + } + } + } + if (modinfo->deps) { + if (strcmp(modinfo->name, module_name) == 0) { + /* we depend on other module(s) */ + for (sl = modinfo->deps; *sl != NULL; sl++) { + int subrv = module_load("", *sl, errp); + if (subrv <= 0) { + rv = subrv; + goto out; + } + } + } else { + for (sl = modinfo->deps; *sl != NULL; sl++) { + if (strcmp(module_name, *sl) == 0) { + /* another module depends on us */ + export_symbols = true; + } + } + } } } - if (!success) { + for (i = 0; i < n_dirs; i++) { + char *fname = g_strdup_printf("%s/%s%s", + dirs[i], module_name, CONFIG_HOST_DSOSUF); + int ret = access(fname, F_OK); + if (ret != 0 && (errno == ENOENT || errno == ENOTDIR)) { + /* + * if we don't find the module in this dir, try the next one. + * If we don't find it in any dir, that can be fine too: user + * did not install the module. We will return 0 in this case + * with no error set. + */ + g_free(fname); + continue; + } else if (ret != 0) { + /* most common is EACCES here */ + error_setg_errno(errp, errno, "error trying to access %s", fname); + } else if (module_load_dso(fname, export_symbols, errp)) { + rv = 1; /* module successfully loaded */ + } + g_free(fname); + goto out; + } + rv = 0; /* module not found */ + +out: + if (rv <= 0) { g_hash_table_remove(loaded_modules, module_name); g_free(module_name); } - for (i = 0; i < n_dirs; i++) { g_free(dirs[i]); } - -#endif - return success; + return rv; } -#ifdef CONFIG_MODULES - static bool module_loaded_qom_all; -void module_load_qom(const char *type) +int module_load_qom(const char *type, Error **errp) { const QemuModinfo *modinfo; const char **sl; + int rv = 0; if (!type) { - return; + error_setg(errp, "%s", "type is NULL"); + return -1; } trace_module_lookup_object_type(type); @@ -331,15 +337,24 @@ void module_load_qom(const char *type) } for (sl = modinfo->objs; *sl != NULL; sl++) { if (strcmp(type, *sl) == 0) { - module_load("", modinfo->name); + if (rv > 0) { + error_setg(errp, "multiple modules providing '%s'", type); + return -1; + } + rv = module_load("", modinfo->name, errp); + if (rv < 0) { + return rv; + } } } } + return rv; } void module_load_qom_all(void) { const QemuModinfo *modinfo; + Error *local_err = NULL; if (module_loaded_qom_all) { return; @@ -352,7 +367,9 @@ void module_load_qom_all(void) if (!module_check_arch(modinfo)) { continue; } - module_load("", modinfo->name); + if (module_load("", modinfo->name, &local_err) < 0) { + error_report_err(local_err); + } } module_loaded_qom_all = true; } @@ -368,7 +385,10 @@ void qemu_load_module_for_opts(const char *group) } for (sl = modinfo->opts; *sl != NULL; sl++) { if (strcmp(group, *sl) == 0) { - module_load("", modinfo->name); + Error *local_err = NULL; + if (module_load("", modinfo->name, &local_err) < 0) { + error_report_err(local_err); + } } } } @@ -378,7 +398,8 @@ void qemu_load_module_for_opts(const char *group) void module_allow_arch(const char *arch) {} void qemu_load_module_for_opts(const char *group) {} -void module_load_qom(const char *type) {} +int module_load(const char *prefix, const char *name, Error **errp) { return 2; } +int module_load_qom(const char *type, Error **errp) { return 2; } void module_load_qom_all(void) {} #endif From 971974f0a9745a5163e1c825d38da03118054ae2 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 29 Sep 2022 11:30:34 +0200 Subject: [PATCH 11/12] dmg: warn when opening dmg images containing blocks of unknown type Signed-off-by: Kevin Wolf Signed-off-by: Claudio Fontana Reviewed-by: Richard Henderson Message-Id: <20220929093035.4231-5-cfontana@suse.de> Signed-off-by: Paolo Bonzini --- block/dmg.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/block/dmg.c b/block/dmg.c index ba8ec344d4..675e840ca5 100644 --- a/block/dmg.c +++ b/block/dmg.c @@ -254,6 +254,25 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds, for (i = s->n_chunks; i < s->n_chunks + chunk_count; i++) { s->types[i] = buff_read_uint32(buffer, offset); if (!dmg_is_known_block_type(s->types[i])) { + switch (s->types[i]) { + case UDBZ: + warn_report_once("dmg-bzip2 module is missing, accessing bzip2 " + "compressed blocks will result in I/O errors"); + break; + case ULFO: + warn_report_once("dmg-lzfse module is missing, accessing lzfse " + "compressed blocks will result in I/O errors"); + break; + case UDCM: + case UDLE: + /* Comments and last entry can be ignored without problems */ + break; + default: + warn_report_once("Image contains chunks of unknown type %x, " + "accessing them will result in I/O errors", + s->types[i]); + break; + } chunk_count--; i--; offset += 40; From 5141e9a23fc9a890d66a5700920a5ffd8885121f Mon Sep 17 00:00:00 2001 From: Claudio Fontana Date: Thu, 29 Sep 2022 11:30:35 +0200 Subject: [PATCH 12/12] accel: abort if we fail to load the accelerator plugin MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit if QEMU is configured with modules enabled, it is possible that the load of an accelerator module will fail. Exit in this case, relying on module_object_class_by_name to report the specific load error if any. Signed-off-by: Claudio Fontana Reviewed-by: Richard Henderson [claudio: changed abort() to exit(1)] Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Markus Armbruster Message-Id: <20220929093035.4231-6-cfontana@suse.de> Signed-off-by: Paolo Bonzini --- accel/accel-softmmu.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/accel/accel-softmmu.c b/accel/accel-softmmu.c index 67276e4f52..f9cdafb148 100644 --- a/accel/accel-softmmu.c +++ b/accel/accel-softmmu.c @@ -66,6 +66,7 @@ void accel_init_ops_interfaces(AccelClass *ac) { const char *ac_name; char *ops_name; + ObjectClass *oc; AccelOpsClass *ops; ac_name = object_class_get_name(OBJECT_CLASS(ac)); @@ -73,8 +74,13 @@ void accel_init_ops_interfaces(AccelClass *ac) ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name); ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name)); + oc = module_object_class_by_name(ops_name); + if (!oc) { + error_report("fatal: could not load module for type '%s'", ops_name); + exit(1); + } g_free(ops_name); - + ops = ACCEL_OPS_CLASS(oc); /* * all accelerators need to define ops, providing at least a mandatory * non-NULL create_vcpu_thread operation.