* [PATCH v3 1/4] util: rename qemu_open() to qemu_open_old()
2020-07-24 13:25 [PATCH v3 0/4] block: improve error reporting for unsupported O_DIRECT Daniel P. Berrangé
@ 2020-07-24 13:25 ` Daniel P. Berrangé
2020-07-24 13:54 ` Eric Blake
2020-07-24 14:24 ` Philippe Mathieu-Daudé
2020-07-24 13:25 ` [PATCH v3 2/4] util: introduce qemu_open and qemu_create with error reporting Daniel P. Berrangé
` (2 subsequent siblings)
3 siblings, 2 replies; 15+ messages in thread
From: Daniel P. Berrangé @ 2020-07-24 13:25 UTC (permalink / raw)
To: qemu-devel
Cc: Kevin Wolf, Daniel P. Berrangé,
qemu-block, Philippe Mathieu-Daudé,
Markus Armbruster, Max Reitz
We want to introduce a new version of qemu_open() that uses an Error
object for reporting problems and make this it the preferred interface.
Rename the existing method to release the namespace for the new impl.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
accel/kvm/kvm-all.c | 2 +-
backends/rng-random.c | 2 +-
backends/tpm/tpm_passthrough.c | 8 ++++----
block/file-posix.c | 14 +++++++-------
block/file-win32.c | 5 +++--
block/vvfat.c | 5 +++--
chardev/char-fd.c | 2 +-
chardev/char-pipe.c | 6 +++---
chardev/char.c | 2 +-
dump/dump.c | 2 +-
hw/s390x/s390-skeys.c | 2 +-
hw/usb/host-libusb.c | 2 +-
hw/vfio/common.c | 4 ++--
include/qemu/osdep.h | 2 +-
io/channel-file.c | 2 +-
net/vhost-vdpa.c | 2 +-
os-posix.c | 2 +-
qga/channel-posix.c | 4 ++--
qga/commands-posix.c | 6 +++---
target/arm/kvm.c | 2 +-
ui/console.c | 2 +-
util/osdep.c | 2 +-
util/oslib-posix.c | 2 +-
23 files changed, 42 insertions(+), 40 deletions(-)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 63ef6af9a1..ad8b315b35 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2013,7 +2013,7 @@ static int kvm_init(MachineState *ms)
#endif
QLIST_INIT(&s->kvm_parked_vcpus);
s->vmfd = -1;
- s->fd = qemu_open("/dev/kvm", O_RDWR);
+ s->fd = qemu_open_old("/dev/kvm", O_RDWR);
if (s->fd == -1) {
fprintf(stderr, "Could not access KVM kernel module: %m\n");
ret = -errno;
diff --git a/backends/rng-random.c b/backends/rng-random.c
index 32998d8ee7..245b12ab24 100644
--- a/backends/rng-random.c
+++ b/backends/rng-random.c
@@ -75,7 +75,7 @@ static void rng_random_opened(RngBackend *b, Error **errp)
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"filename", "a valid filename");
} else {
- s->fd = qemu_open(s->filename, O_RDONLY | O_NONBLOCK);
+ s->fd = qemu_open_old(s->filename, O_RDONLY | O_NONBLOCK);
if (s->fd == -1) {
error_setg_file_open(errp, errno, s->filename);
}
diff --git a/backends/tpm/tpm_passthrough.c b/backends/tpm/tpm_passthrough.c
index 7403807ec4..81e2d8f531 100644
--- a/backends/tpm/tpm_passthrough.c
+++ b/backends/tpm/tpm_passthrough.c
@@ -217,7 +217,7 @@ static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt)
char path[PATH_MAX];
if (tpm_pt->options->cancel_path) {
- fd = qemu_open(tpm_pt->options->cancel_path, O_WRONLY);
+ fd = qemu_open_old(tpm_pt->options->cancel_path, O_WRONLY);
if (fd < 0) {
error_report("tpm_passthrough: Could not open TPM cancel path: %s",
strerror(errno));
@@ -235,11 +235,11 @@ static int tpm_passthrough_open_sysfs_cancel(TPMPassthruState *tpm_pt)
dev++;
if (snprintf(path, sizeof(path), "/sys/class/tpm/%s/device/cancel",
dev) < sizeof(path)) {
- fd = qemu_open(path, O_WRONLY);
+ fd = qemu_open_old(path, O_WRONLY);
if (fd < 0) {
if (snprintf(path, sizeof(path), "/sys/class/misc/%s/device/cancel",
dev) < sizeof(path)) {
- fd = qemu_open(path, O_WRONLY);
+ fd = qemu_open_old(path, O_WRONLY);
}
}
}
@@ -271,7 +271,7 @@ tpm_passthrough_handle_device_opts(TPMPassthruState *tpm_pt, QemuOpts *opts)
}
tpm_pt->tpm_dev = value ? value : TPM_PASSTHROUGH_DEFAULT_DEVICE;
- tpm_pt->tpm_fd = qemu_open(tpm_pt->tpm_dev, O_RDWR);
+ tpm_pt->tpm_fd = qemu_open_old(tpm_pt->tpm_dev, O_RDWR);
if (tpm_pt->tpm_fd < 0) {
error_report("Cannot access TPM device using '%s': %s",
tpm_pt->tpm_dev, strerror(errno));
diff --git a/block/file-posix.c b/block/file-posix.c
index 9a00d4190a..bac2566f10 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -630,7 +630,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
raw_parse_flags(bdrv_flags, &s->open_flags, false);
s->fd = -1;
- fd = qemu_open(filename, s->open_flags, 0644);
+ fd = qemu_open_old(filename, s->open_flags, 0644);
ret = fd < 0 ? -errno : 0;
if (ret < 0) {
@@ -1032,13 +1032,13 @@ static int raw_reconfigure_getfd(BlockDriverState *bs, int flags,
}
}
- /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
+ /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open_old() */
if (fd == -1) {
const char *normalized_filename = bs->filename;
ret = raw_normalize_devicepath(&normalized_filename, errp);
if (ret >= 0) {
assert(!(*open_flags & O_CREAT));
- fd = qemu_open(normalized_filename, *open_flags);
+ fd = qemu_open_old(normalized_filename, *open_flags);
if (fd == -1) {
error_setg_errno(errp, errno, "Could not reopen file");
return -1;
@@ -2411,7 +2411,7 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
}
/* Create file */
- fd = qemu_open(file_opts->filename, O_RDWR | O_CREAT | O_BINARY, 0644);
+ fd = qemu_open_old(file_opts->filename, O_RDWR | O_CREAT | O_BINARY, 0644);
if (fd < 0) {
result = -errno;
error_setg_errno(errp, -result, "Could not create file");
@@ -3335,7 +3335,7 @@ static bool setup_cdrom(char *bsd_path, Error **errp)
for (index = 0; index < num_of_test_partitions; index++) {
snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path,
index);
- fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE);
+ fd = qemu_open_old(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE);
if (fd >= 0) {
partition_found = true;
qemu_close(fd);
@@ -3653,7 +3653,7 @@ static int cdrom_probe_device(const char *filename)
int prio = 0;
struct stat st;
- fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
+ fd = qemu_open_old(filename, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
goto out;
}
@@ -3787,7 +3787,7 @@ static int cdrom_reopen(BlockDriverState *bs)
*/
if (s->fd >= 0)
qemu_close(s->fd);
- fd = qemu_open(bs->filename, s->open_flags, 0644);
+ fd = qemu_open_old(bs->filename, s->open_flags, 0644);
if (fd < 0) {
s->fd = -1;
return -EIO;
diff --git a/block/file-win32.c b/block/file-win32.c
index ab69bd811a..8c1845830e 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -576,8 +576,9 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
return -EINVAL;
}
- fd = qemu_open(file_opts->filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
- 0644);
+ fd = qemu_open_old(file_opts->filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
+ 0644);
if (fd < 0) {
error_setg_errno(errp, errno, "Could not create file");
return -EIO;
diff --git a/block/vvfat.c b/block/vvfat.c
index 36b53c8757..5abb90e7c7 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1352,7 +1352,8 @@ static int open_file(BDRVVVFATState* s,mapping_t* mapping)
if(!s->current_mapping ||
strcmp(s->current_mapping->path,mapping->path)) {
/* open file */
- int fd = qemu_open(mapping->path, O_RDONLY | O_BINARY | O_LARGEFILE);
+ int fd = qemu_open_old(mapping->path,
+ O_RDONLY | O_BINARY | O_LARGEFILE);
if(fd<0)
return -1;
vvfat_close_current_file(s);
@@ -2513,7 +2514,7 @@ static int commit_one_file(BDRVVVFATState* s,
for (i = s->cluster_size; i < offset; i += s->cluster_size)
c = modified_fat_get(s, c);
- fd = qemu_open(mapping->path, O_RDWR | O_CREAT | O_BINARY, 0666);
+ fd = qemu_open_old(mapping->path, O_RDWR | O_CREAT | O_BINARY, 0666);
if (fd < 0) {
fprintf(stderr, "Could not open %s... (%s, %d)\n", mapping->path,
strerror(errno), errno);
diff --git a/chardev/char-fd.c b/chardev/char-fd.c
index c2d8101106..1cd62f2779 100644
--- a/chardev/char-fd.c
+++ b/chardev/char-fd.c
@@ -119,7 +119,7 @@ int qmp_chardev_open_file_source(char *src, int flags, Error **errp)
{
int fd = -1;
- TFR(fd = qemu_open(src, flags, 0666));
+ TFR(fd = qemu_open_old(src, flags, 0666));
if (fd == -1) {
error_setg_file_open(errp, errno, src);
}
diff --git a/chardev/char-pipe.c b/chardev/char-pipe.c
index fd12c9e63b..7eca5d9a56 100644
--- a/chardev/char-pipe.c
+++ b/chardev/char-pipe.c
@@ -132,8 +132,8 @@ static void qemu_chr_open_pipe(Chardev *chr,
filename_in = g_strdup_printf("%s.in", filename);
filename_out = g_strdup_printf("%s.out", filename);
- TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
- TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
+ TFR(fd_in = qemu_open_old(filename_in, O_RDWR | O_BINARY));
+ TFR(fd_out = qemu_open_old(filename_out, O_RDWR | O_BINARY));
g_free(filename_in);
g_free(filename_out);
if (fd_in < 0 || fd_out < 0) {
@@ -143,7 +143,7 @@ static void qemu_chr_open_pipe(Chardev *chr,
if (fd_out >= 0) {
close(fd_out);
}
- TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
+ TFR(fd_in = fd_out = qemu_open_old(filename, O_RDWR | O_BINARY));
if (fd_in < 0) {
error_setg_file_open(errp, errno, filename);
return;
diff --git a/chardev/char.c b/chardev/char.c
index 77e7ec814f..6b85099c03 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -235,7 +235,7 @@ static void qemu_char_open(Chardev *chr, ChardevBackend *backend,
} else {
flags |= O_TRUNC;
}
- chr->logfd = qemu_open(common->logfile, flags, 0666);
+ chr->logfd = qemu_open_old(common->logfile, flags, 0666);
if (chr->logfd < 0) {
error_setg_errno(errp, errno,
"Unable to open logfile %s",
diff --git a/dump/dump.c b/dump/dump.c
index 383bc7876b..13fda440a4 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -1994,7 +1994,7 @@ void qmp_dump_guest_memory(bool paging, const char *file,
#endif
if (strstart(file, "file:", &p)) {
- fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR);
+ fd = qemu_open_old(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR);
if (fd < 0) {
error_setg_file_open(errp, errno, p);
return;
diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c
index db2f49cb27..5cc559fe4c 100644
--- a/hw/s390x/s390-skeys.c
+++ b/hw/s390x/s390-skeys.c
@@ -125,7 +125,7 @@ void qmp_dump_skeys(const char *filename, Error **errp)
return;
}
- fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+ fd = qemu_open_old(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd < 0) {
error_setg_file_open(errp, errno, filename);
return;
diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index c474551d84..14dd4de684 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -1111,7 +1111,7 @@ static void usb_host_realize(USBDevice *udev, Error **errp)
if (s->hostdevice) {
int fd;
s->needs_autoscan = false;
- fd = qemu_open(s->hostdevice, O_RDWR);
+ fd = qemu_open_old(s->hostdevice, O_RDWR);
if (fd < 0) {
error_setg_errno(errp, errno, "failed to open %s", s->hostdevice);
return;
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 33357140b8..13471ae294 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1254,7 +1254,7 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as,
}
}
- fd = qemu_open("/dev/vfio/vfio", O_RDWR);
+ fd = qemu_open_old("/dev/vfio/vfio", O_RDWR);
if (fd < 0) {
error_setg_errno(errp, errno, "failed to open /dev/vfio/vfio");
ret = -errno;
@@ -1479,7 +1479,7 @@ VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp)
group = g_malloc0(sizeof(*group));
snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
- group->fd = qemu_open(path, O_RDWR);
+ group->fd = qemu_open_old(path, O_RDWR);
if (group->fd < 0) {
error_setg_errno(errp, errno, "failed to open %s", path);
goto free_group_exit;
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 45c217aa28..3a16e58932 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -494,7 +494,7 @@ int qemu_madvise(void *addr, size_t len, int advice);
int qemu_mprotect_rwx(void *addr, size_t size);
int qemu_mprotect_none(void *addr, size_t size);
-int qemu_open(const char *name, int flags, ...);
+int qemu_open_old(const char *name, int flags, ...);
int qemu_close(int fd);
int qemu_unlink(const char *name);
#ifndef _WIN32
diff --git a/io/channel-file.c b/io/channel-file.c
index dac21f6012..2ed3b75e8b 100644
--- a/io/channel-file.c
+++ b/io/channel-file.c
@@ -51,7 +51,7 @@ qio_channel_file_new_path(const char *path,
ioc = QIO_CHANNEL_FILE(object_new(TYPE_QIO_CHANNEL_FILE));
- ioc->fd = qemu_open(path, flags, mode);
+ ioc->fd = qemu_open_old(path, flags, mode);
if (ioc->fd < 0) {
object_unref(OBJECT(ioc));
error_setg_errno(errp, errno,
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index bc0e0d2d35..e2b3ba85bf 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -184,7 +184,7 @@ static int net_vhost_vdpa_init(NetClientState *peer, const char *device,
snprintf(nc->info_str, sizeof(nc->info_str), TYPE_VHOST_VDPA);
nc->queue_index = 0;
s = DO_UPCAST(VhostVDPAState, nc, nc);
- vdpa_device_fd = qemu_open(vhostdev, O_RDWR);
+ vdpa_device_fd = qemu_open_old(vhostdev, O_RDWR);
if (vdpa_device_fd == -1) {
return -errno;
}
diff --git a/os-posix.c b/os-posix.c
index 3572db3f44..1b927c7c04 100644
--- a/os-posix.c
+++ b/os-posix.c
@@ -297,7 +297,7 @@ void os_setup_post(void)
error_report("not able to chdir to /: %s", strerror(errno));
exit(1);
}
- TFR(fd = qemu_open("/dev/null", O_RDWR));
+ TFR(fd = qemu_open_old("/dev/null", O_RDWR));
if (fd == -1) {
exit(1);
}
diff --git a/qga/channel-posix.c b/qga/channel-posix.c
index 8fc205ad21..0373975360 100644
--- a/qga/channel-posix.c
+++ b/qga/channel-posix.c
@@ -127,7 +127,7 @@ static gboolean ga_channel_open(GAChannel *c, const gchar *path,
switch (c->method) {
case GA_CHANNEL_VIRTIO_SERIAL: {
assert(fd < 0);
- fd = qemu_open(path, O_RDWR | O_NONBLOCK
+ fd = qemu_open_old(path, O_RDWR | O_NONBLOCK
#ifndef CONFIG_SOLARIS
| O_ASYNC
#endif
@@ -157,7 +157,7 @@ static gboolean ga_channel_open(GAChannel *c, const gchar *path,
struct termios tio;
assert(fd < 0);
- fd = qemu_open(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
+ fd = qemu_open_old(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (fd == -1) {
g_critical("error opening channel: %s", strerror(errno));
return false;
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 1a62a3a70d..ffe0d24bf3 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -1304,7 +1304,7 @@ int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
}
}
- fd = qemu_open(mount->dirname, O_RDONLY);
+ fd = qemu_open_old(mount->dirname, O_RDONLY);
if (fd == -1) {
error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
goto error;
@@ -1371,7 +1371,7 @@ int64_t qmp_guest_fsfreeze_thaw(Error **errp)
QTAILQ_FOREACH(mount, &mounts, next) {
logged = false;
- fd = qemu_open(mount->dirname, O_RDONLY);
+ fd = qemu_open_old(mount->dirname, O_RDONLY);
if (fd == -1) {
continue;
}
@@ -1461,7 +1461,7 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
list->next = response->paths;
response->paths = list;
- fd = qemu_open(mount->dirname, O_RDONLY);
+ fd = qemu_open_old(mount->dirname, O_RDONLY);
if (fd == -1) {
result->error = g_strdup_printf("failed to open: %s",
strerror(errno));
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 8bb7318378..f944bfa0dc 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -71,7 +71,7 @@ bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try,
{
int ret = 0, kvmfd = -1, vmfd = -1, cpufd = -1;
- kvmfd = qemu_open("/dev/kvm", O_RDWR);
+ kvmfd = qemu_open_old("/dev/kvm", O_RDWR);
if (kvmfd < 0) {
goto err;
}
diff --git a/ui/console.c b/ui/console.c
index 0579be792f..02eca16bd7 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -372,7 +372,7 @@ void qmp_screendump(const char *filename, bool has_device, const char *device,
return;
}
- fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
+ fd = qemu_open_old(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
if (fd == -1) {
error_setg(errp, "failed to open file '%s': %s", filename,
strerror(errno));
diff --git a/util/osdep.c b/util/osdep.c
index 4829c07ff6..9df1b6adec 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -282,7 +282,7 @@ int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive)
/*
* Opens a file with FD_CLOEXEC set
*/
-int qemu_open(const char *name, int flags, ...)
+int qemu_open_old(const char *name, int flags, ...)
{
int ret;
int mode = 0;
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index d923674624..4706c2f744 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -125,7 +125,7 @@ bool qemu_write_pidfile(const char *path, Error **errp)
.l_len = 0,
};
- fd = qemu_open(path, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
+ fd = qemu_open_old(path, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
if (fd == -1) {
error_setg_errno(errp, errno, "Cannot open pid file");
return false;
--
2.26.2
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 2/4] util: introduce qemu_open and qemu_create with error reporting
2020-07-24 13:25 [PATCH v3 0/4] block: improve error reporting for unsupported O_DIRECT Daniel P. Berrangé
2020-07-24 13:25 ` [PATCH v3 1/4] util: rename qemu_open() to qemu_open_old() Daniel P. Berrangé
@ 2020-07-24 13:25 ` Daniel P. Berrangé
2020-07-24 14:02 ` Eric Blake
` (2 more replies)
2020-07-24 13:25 ` [PATCH v3 3/4] util: give a specific error message when O_DIRECT doesn't work Daniel P. Berrangé
2020-07-24 13:25 ` [PATCH v3 4/4] block: switch to use qemu_open/qemu_create for improved errors Daniel P. Berrangé
3 siblings, 3 replies; 15+ messages in thread
From: Daniel P. Berrangé @ 2020-07-24 13:25 UTC (permalink / raw)
To: qemu-devel
Cc: Kevin Wolf, Daniel P. Berrangé,
qemu-block, Philippe Mathieu-Daudé,
Markus Armbruster, Max Reitz
This introduces two new helper metohds
int qemu_open(const char *name, int flags, Error **errp);
int qemu_create(const char *name, int flags, mode_t mode, Error **errp);
Note that with this design we no longer require or even accept the
O_CREAT flag. Avoiding overloading the two distinct operations
means we can avoid variable arguments which would prevent 'errp' from
being the last argument. It also gives us a guarantee that the 'mode' is
given when creating files, avoiding a latent security bug.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
include/qemu/osdep.h | 6 ++++
util/osdep.c | 78 ++++++++++++++++++++++++++++++++++++--------
2 files changed, 71 insertions(+), 13 deletions(-)
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 3a16e58932..ca24ebe211 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -494,7 +494,13 @@ int qemu_madvise(void *addr, size_t len, int advice);
int qemu_mprotect_rwx(void *addr, size_t size);
int qemu_mprotect_none(void *addr, size_t size);
+/*
+ * Don't introduce new usage of this function, prefer the following
+ * qemu_open/qemu_create that take a "Error **errp"
+ */
int qemu_open_old(const char *name, int flags, ...);
+int qemu_open(const char *name, int flags, Error **errp);
+int qemu_create(const char *name, int flags, mode_t mode, Error **errp);
int qemu_close(int fd);
int qemu_unlink(const char *name);
#ifndef _WIN32
diff --git a/util/osdep.c b/util/osdep.c
index 9df1b6adec..5c0f4684b1 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -22,6 +22,7 @@
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
+#include "qapi/error.h"
/* Needed early for CONFIG_BSD etc. */
@@ -282,10 +283,10 @@ int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive)
/*
* Opens a file with FD_CLOEXEC set
*/
-int qemu_open_old(const char *name, int flags, ...)
+static int
+qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
{
int ret;
- int mode = 0;
#ifndef _WIN32
const char *fdset_id_str;
@@ -297,24 +298,31 @@ int qemu_open_old(const char *name, int flags, ...)
fdset_id = qemu_parse_fdset(fdset_id_str);
if (fdset_id == -1) {
+ error_setg(errp, "Could not parse fdset %s", name);
errno = EINVAL;
return -1;
}
fd = monitor_fdset_get_fd(fdset_id, flags);
if (fd < 0) {
+ error_setg_errno(errp, -fd, "Could not acquire FD for %s flags %x",
+ name, flags);
errno = -fd;
return -1;
}
dupfd = qemu_dup_flags(fd, flags);
if (dupfd == -1) {
+ error_setg_errno(errp, errno, "Could not dup FD for %s flags %x",
+ name, flags);
return -1;
}
ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
if (ret == -1) {
close(dupfd);
+ error_setg(errp, "Could not save FD for %s flags %x",
+ name, flags);
errno = EINVAL;
return -1;
}
@@ -323,22 +331,66 @@ int qemu_open_old(const char *name, int flags, ...)
}
#endif
- if (flags & O_CREAT) {
- va_list ap;
-
- va_start(ap, flags);
- mode = va_arg(ap, int);
- va_end(ap);
- }
-
#ifdef O_CLOEXEC
- ret = open(name, flags | O_CLOEXEC, mode);
-#else
+ flags |= O_CLOEXEC;
+#endif /* O_CLOEXEC */
+
ret = open(name, flags, mode);
+
+#ifndef O_CLOEXEC
if (ret >= 0) {
qemu_set_cloexec(ret);
}
-#endif
+#endif /* ! O_CLOEXEC */
+
+ if (ret == -1) {
+ const char *action = "open";
+ if (flags & O_CREAT) {
+ action = "create";
+ }
+ error_setg_errno(errp, errno, "Could not %s '%s' flags 0x%x",
+ action, name, flags);
+ }
+
+
+ return ret;
+}
+
+
+int qemu_open(const char *name, int flags, Error **errp)
+{
+ if (flags & O_CREAT) {
+ error_setg(errp,
+ "Invalid O_CREAT flag passed to qemu_open, use qemu_create");
+ return -1;
+ }
+ return qemu_open_internal(name, flags, 0, errp);
+}
+
+
+int qemu_create(const char *name, int flags, mode_t mode, Error **errp)
+{
+ if (flags & O_CREAT) {
+ error_setg(errp, "Redundant O_CREAT flag passed to qemu_create");
+ return -1;
+ }
+ return qemu_open_internal(name, flags | O_CREAT, mode, errp);
+}
+
+
+int qemu_open_old(const char *name, int flags, ...)
+{
+ va_list ap;
+ mode_t mode = 0;
+ int ret;
+
+ va_start(ap, flags);
+ if (flags & O_CREAT) {
+ mode = va_arg(ap, int);
+ }
+ va_end(ap);
+
+ ret = qemu_open_internal(name, flags, mode, NULL);
#ifdef O_DIRECT
if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {
--
2.26.2
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 4/4] block: switch to use qemu_open/qemu_create for improved errors
2020-07-24 13:25 [PATCH v3 0/4] block: improve error reporting for unsupported O_DIRECT Daniel P. Berrangé
` (2 preceding siblings ...)
2020-07-24 13:25 ` [PATCH v3 3/4] util: give a specific error message when O_DIRECT doesn't work Daniel P. Berrangé
@ 2020-07-24 13:25 ` Daniel P. Berrangé
2020-07-24 14:10 ` Eric Blake
` (2 more replies)
3 siblings, 3 replies; 15+ messages in thread
From: Daniel P. Berrangé @ 2020-07-24 13:25 UTC (permalink / raw)
To: qemu-devel
Cc: Kevin Wolf, Daniel P. Berrangé,
qemu-block, Philippe Mathieu-Daudé,
Markus Armbruster, Max Reitz
Currently at startup if using cache=none on a filesystem lacking
O_DIRECT such as tmpfs, at startup QEMU prints
qemu-system-x86_64: -drive file=/tmp/foo.img,cache=none: file system may not support O_DIRECT
qemu-system-x86_64: -drive file=/tmp/foo.img,cache=none: Could not open '/tmp/foo.img': Invalid argument
while at QMP level the hint is missing, so QEMU reports just
"error": {
"class": "GenericError",
"desc": "Could not open '/tmp/foo.img': Invalid argument"
}
which is close to useless for the end user trying to figure out what
they did wrong.
With this change at startup QEMU prints
qemu-system-x86_64: -drive file=/tmp/foo.img,cache=none: Unable to open '/tmp/foo.img' flags 0x4000: filesystem does not support O_DIRECT
while at the QMP level QEMU reports a massively more informative
"error": {
"class": "GenericError",
"desc": "Unable to open '/tmp/foo.img' flags 0x4002: filesystem does not support O_DIRECT"
}
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
block/file-posix.c | 18 +++++++-----------
block/file-win32.c | 6 ++----
tests/qemu-iotests/051.out | 4 ++--
tests/qemu-iotests/051.pc.out | 4 ++--
tests/qemu-iotests/061.out | 2 +-
tests/qemu-iotests/069.out | 2 +-
tests/qemu-iotests/082.out | 4 ++--
tests/qemu-iotests/111.out | 2 +-
tests/qemu-iotests/226.out | 6 +++---
tests/qemu-iotests/232.out | 12 ++++++------
tests/qemu-iotests/244.out | 6 +++---
11 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index bac2566f10..c63926d592 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -630,11 +630,10 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
raw_parse_flags(bdrv_flags, &s->open_flags, false);
s->fd = -1;
- fd = qemu_open_old(filename, s->open_flags, 0644);
+ fd = qemu_open(filename, s->open_flags, errp);
ret = fd < 0 ? -errno : 0;
if (ret < 0) {
- error_setg_file_open(errp, -ret, filename);
if (ret == -EROFS) {
ret = -EACCES;
}
@@ -1032,15 +1031,13 @@ static int raw_reconfigure_getfd(BlockDriverState *bs, int flags,
}
}
- /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open_old() */
+ /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
if (fd == -1) {
const char *normalized_filename = bs->filename;
ret = raw_normalize_devicepath(&normalized_filename, errp);
if (ret >= 0) {
- assert(!(*open_flags & O_CREAT));
- fd = qemu_open_old(normalized_filename, *open_flags);
+ fd = qemu_open(normalized_filename, *open_flags, errp);
if (fd == -1) {
- error_setg_errno(errp, errno, "Could not reopen file");
return -1;
}
}
@@ -2411,10 +2408,9 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
}
/* Create file */
- fd = qemu_open_old(file_opts->filename, O_RDWR | O_CREAT | O_BINARY, 0644);
+ fd = qemu_create(file_opts->filename, O_RDWR | O_BINARY, 0644, errp);
if (fd < 0) {
result = -errno;
- error_setg_errno(errp, -result, "Could not create file");
goto out;
}
@@ -3335,7 +3331,7 @@ static bool setup_cdrom(char *bsd_path, Error **errp)
for (index = 0; index < num_of_test_partitions; index++) {
snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path,
index);
- fd = qemu_open_old(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE);
+ fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE, NULL);
if (fd >= 0) {
partition_found = true;
qemu_close(fd);
@@ -3653,7 +3649,7 @@ static int cdrom_probe_device(const char *filename)
int prio = 0;
struct stat st;
- fd = qemu_open_old(filename, O_RDONLY | O_NONBLOCK);
+ fd = qemu_open(filename, O_RDONLY | O_NONBLOCK, NULL);
if (fd < 0) {
goto out;
}
@@ -3787,7 +3783,7 @@ static int cdrom_reopen(BlockDriverState *bs)
*/
if (s->fd >= 0)
qemu_close(s->fd);
- fd = qemu_open_old(bs->filename, s->open_flags, 0644);
+ fd = qemu_open(bs->filename, s->open_flags, NULL);
if (fd < 0) {
s->fd = -1;
return -EIO;
diff --git a/block/file-win32.c b/block/file-win32.c
index 8c1845830e..1a31f8a5ba 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -576,11 +576,9 @@ static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
return -EINVAL;
}
- fd = qemu_open_old(file_opts->filename,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
- 0644);
+ fd = qemu_create(file_opts->filename, O_WRONLY | O_TRUNC | O_BINARY,
+ 0644, errp);
if (fd < 0) {
- error_setg_errno(errp, errno, "Could not create file");
return -EIO;
}
set_sparse(fd);
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index de4771bcb3..242dcfe08d 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -363,7 +363,7 @@ Testing: -drive file=foo:bar
QEMU_PROG: -drive file=foo:bar: Unknown protocol 'foo'
Testing: -drive file.filename=foo:bar
-QEMU_PROG: -drive file.filename=foo:bar: Could not open 'foo:bar': No such file or directory
+QEMU_PROG: -drive file.filename=foo:bar: Could not open 'foo:bar' flags 0x08000: No such file or directory
Testing: -hda file:TEST_DIR/t.qcow2
QEMU X.Y.Z monitor - type 'help' for more information
@@ -374,7 +374,7 @@ QEMU X.Y.Z monitor - type 'help' for more information
(qemu) quit
Testing: -drive file.filename=file:TEST_DIR/t.qcow2
-QEMU_PROG: -drive file.filename=file:TEST_DIR/t.qcow2: Could not open 'file:TEST_DIR/t.qcow2': No such file or directory
+QEMU_PROG: -drive file.filename=file:TEST_DIR/t.qcow2: Could not open 'file:TEST_DIR/t.qcow2' flags 0x80000: No such file or directory
=== Snapshot mode ===
diff --git a/tests/qemu-iotests/051.pc.out b/tests/qemu-iotests/051.pc.out
index f707471fb0..4c41b46986 100644
--- a/tests/qemu-iotests/051.pc.out
+++ b/tests/qemu-iotests/051.pc.out
@@ -463,7 +463,7 @@ Testing: -drive file=foo:bar
QEMU_PROG: -drive file=foo:bar: Unknown protocol 'foo'
Testing: -drive file.filename=foo:bar
-QEMU_PROG: -drive file.filename=foo:bar: Could not open 'foo:bar': No such file or directory
+QEMU_PROG: -drive file.filename=foo:bar: Could not open 'foo:bar' flags 0x80000: No such file or directory
Testing: -hda file:TEST_DIR/t.qcow2
QEMU X.Y.Z monitor - type 'help' for more information
@@ -474,7 +474,7 @@ QEMU X.Y.Z monitor - type 'help' for more information
(qemu) quit
Testing: -drive file.filename=file:TEST_DIR/t.qcow2
-QEMU_PROG: -drive file.filename=file:TEST_DIR/t.qcow2: Could not open 'file:TEST_DIR/t.qcow2': No such file or directory
+QEMU_PROG: -drive file.filename=file:TEST_DIR/t.qcow2: Could not open 'file:TEST_DIR/t.qcow2' flags 0x80000: No such file or directory
=== Snapshot mode ===
diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
index b2d2dfed04..a533b0d416 100644
--- a/tests/qemu-iotests/061.out
+++ b/tests/qemu-iotests/061.out
@@ -538,7 +538,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
qemu-img: data-file can only be set for images that use an external data file
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 data_file=TEST_DIR/t.IMGFMT.data
-qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Could not open 'foo': No such file or directory
+qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Could not open 'foo' flags 0x80000: No such file or directory
image: TEST_DIR/t.IMGFMT
file format: IMGFMT
virtual size: 64 MiB (67108864 bytes)
diff --git a/tests/qemu-iotests/069.out b/tests/qemu-iotests/069.out
index 126b4d2d51..ffb95c965f 100644
--- a/tests/qemu-iotests/069.out
+++ b/tests/qemu-iotests/069.out
@@ -4,5 +4,5 @@ QA output created by 069
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=131072
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
-qemu-io: can't open device TEST_DIR/t.IMGFMT: Could not open backing file: Could not open 'TEST_DIR/t.IMGFMT.base': No such file or directory
+qemu-io: can't open device TEST_DIR/t.IMGFMT: Could not open backing file: Could not open 'TEST_DIR/t.IMGFMT.base' flags 0x80000: No such file or directory
*** done
diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out
index 1728aff1e0..5a718ac1b5 100644
--- a/tests/qemu-iotests/082.out
+++ b/tests/qemu-iotests/082.out
@@ -544,10 +544,10 @@ Supported options:
size=<size> - Virtual disk size
Testing: convert -O qcow2 -o backing_fmt=qcow2,backing_file=TEST_DIR/t.qcow2,,help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
-qemu-img: Could not open 'TEST_DIR/t.qcow2.base': Could not open backing file: Could not open 'TEST_DIR/t.qcow2,help': No such file or directory
+qemu-img: Could not open 'TEST_DIR/t.qcow2.base': Could not open backing file: Could not open 'TEST_DIR/t.qcow2,help' flags 0x80000: No such file or directory
Testing: convert -O qcow2 -o backing_fmt=qcow2,backing_file=TEST_DIR/t.qcow2,,? TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
-qemu-img: Could not open 'TEST_DIR/t.qcow2.base': Could not open backing file: Could not open 'TEST_DIR/t.qcow2,?': No such file or directory
+qemu-img: Could not open 'TEST_DIR/t.qcow2.base': Could not open backing file: Could not open 'TEST_DIR/t.qcow2,?' flags 0x80000: No such file or directory
Testing: convert -O qcow2 -o backing_file=TEST_DIR/t.qcow2, -o help TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
qemu-img: Invalid option list: backing_file=TEST_DIR/t.qcow2,
diff --git a/tests/qemu-iotests/111.out b/tests/qemu-iotests/111.out
index ba034e5c58..90255ea653 100644
--- a/tests/qemu-iotests/111.out
+++ b/tests/qemu-iotests/111.out
@@ -1,4 +1,4 @@
QA output created by 111
-qemu-img: TEST_DIR/t.IMGFMT: Could not open 'TEST_DIR/t.IMGFMT.inexistent': No such file or directory
+qemu-img: TEST_DIR/t.IMGFMT: Could not open 'TEST_DIR/t.IMGFMT.inexistent' flags 0x80000: No such file or directory
Could not open backing image.
*** done
diff --git a/tests/qemu-iotests/226.out b/tests/qemu-iotests/226.out
index 42be973ff2..353fc4c799 100644
--- a/tests/qemu-iotests/226.out
+++ b/tests/qemu-iotests/226.out
@@ -6,7 +6,7 @@ QA output created by 226
qemu-io: can't open: A regular file was expected by the 'file' driver, but something else was given
qemu-io: warning: Opening a character device as a file using the 'file' driver is deprecated
== Testing RW ==
-qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT': Is a directory
+qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Is a directory
qemu-io: warning: Opening a character device as a file using the 'file' driver is deprecated
=== Testing with driver:host_device ===
@@ -14,13 +14,13 @@ qemu-io: warning: Opening a character device as a file using the 'file' driver i
== Testing RO ==
qemu-io: can't open: 'host_device' driver expects either a character or block device
== Testing RW ==
-qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT': Is a directory
+qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Is a directory
=== Testing with driver:host_cdrom ===
== Testing RO ==
qemu-io: can't open: 'host_cdrom' driver expects either a character or block device
== Testing RW ==
-qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT': Is a directory
+qemu-io: can't open: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80802: Is a directory
*** done
diff --git a/tests/qemu-iotests/232.out b/tests/qemu-iotests/232.out
index 3bd1a920af..bfa3f20172 100644
--- a/tests/qemu-iotests/232.out
+++ b/tests/qemu-iotests/232.out
@@ -21,11 +21,11 @@ NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
-QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
+QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Permission denied
NODE_NAME: TEST_DIR/t.IMGFMT (file)
NODE_NAME: TEST_DIR/t.IMGFMT (file)
-QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
+QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Permission denied
NODE_NAME: TEST_DIR/t.IMGFMT (file)
NODE_NAME: TEST_DIR/t.IMGFMT (file)
@@ -49,11 +49,11 @@ node0: TEST_DIR/t.IMGFMT (file, read-only)
node0: TEST_DIR/t.IMGFMT (file, read-only)
node0: TEST_DIR/t.IMGFMT (file, read-only)
-QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
+QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Permission denied
node0: TEST_DIR/t.IMGFMT (file)
-QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
+QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Permission denied
-QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
+QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Permission denied
node0: TEST_DIR/t.IMGFMT (file)
-QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
+QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0: Could not open 'TEST_DIR/t.IMGFMT' flags 0x80002: Permission denied
*** done
diff --git a/tests/qemu-iotests/244.out b/tests/qemu-iotests/244.out
index dbab7359a9..34daec97f2 100644
--- a/tests/qemu-iotests/244.out
+++ b/tests/qemu-iotests/244.out
@@ -9,7 +9,7 @@ read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-qemu-io: can't open device TEST_DIR/t.qcow2: Could not open 'inexistent': No such file or directory
+qemu-io: can't open device TEST_DIR/t.qcow2: Could not open 'inexistent' flags 0x80002: No such file or directory
no file open, try 'help open'
Data file required, but without data file name in the image:
@@ -17,14 +17,14 @@ qemu-io: can't open device TEST_DIR/t.qcow2: 'data-file' is required for this im
no file open, try 'help open'
read 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-qemu-io: can't open device TEST_DIR/t.qcow2: Could not open 'inexistent': No such file or directory
+qemu-io: can't open device TEST_DIR/t.qcow2: Could not open 'inexistent' flags 0x80002: No such file or directory
no file open, try 'help open'
Setting data-file for an image with internal data:
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
qemu-io: can't open device TEST_DIR/t.qcow2: 'data-file' can only be set for images with an external data file
no file open, try 'help open'
-qemu-io: can't open device TEST_DIR/t.qcow2: Could not open 'inexistent': No such file or directory
+qemu-io: can't open device TEST_DIR/t.qcow2: Could not open 'inexistent' flags 0x80002: No such file or directory
no file open, try 'help open'
=== Conflicting features ===
--
2.26.2
^ permalink raw reply related [flat|nested] 15+ messages in thread