#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;
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);
}
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));
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);
}
}
}
}
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));
raw_parse_flags(bdrv_flags, &s->open_flags, false);
s->fd = -1;
- fd = qemu_open(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;
}
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(normalized_filename, *open_flags, errp);
if (fd == -1) {
- error_setg_errno(errp, errno, "Could not reopen file");
return -1;
}
}
}
/* Create file */
- fd = qemu_open(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;
}
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(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE, NULL);
if (fd >= 0) {
partition_found = true;
qemu_close(fd);
int prio = 0;
struct stat st;
- fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
+ fd = qemu_open(filename, O_RDONLY | O_NONBLOCK, NULL);
if (fd < 0) {
goto out;
}
*/
if (s->fd >= 0)
qemu_close(s->fd);
- fd = qemu_open(bs->filename, s->open_flags, 0644);
+ fd = qemu_open(bs->filename, s->open_flags, NULL);
if (fd < 0) {
s->fd = -1;
return -EIO;
return -EINVAL;
}
- fd = qemu_open(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);
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);
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);
{
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);
}
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) {
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;
} 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",
#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;
*/
#define V9FS_REMAP_INODES 0x00000200
#define V9FS_FORBID_MULTIDEVS 0x00000400
+/*
+ * Disables certain performance warnings from being logged on host side.
+ */
+#define V9FS_NO_PERF_WARN 0x00000800
#define V9FS_SEC_MASK 0x0000003C
QLIST_INIT(&synth_root.child);
qemu_mutex_init(&synth_mutex);
+ ctx->export_flags |= V9FS_NO_PERF_WARN;
+
/* Add "." and ".." entries for root */
v9fs_add_dir_node(&synth_root, synth_root.attr->mode,
"..", synth_root.attr, synth_root.attr->inode);
goto out;
}
+ /* 8192 is the default msize of Linux clients */
+ if (s->msize <= 8192 && !(s->ctx.export_flags & V9FS_NO_PERF_WARN)) {
+ warn_report_once(
+ "9p: degraded performance: a reasonable high msize should be "
+ "chosen on client/guest side (chosen msize is <= 8192). See "
+ "https://wiki.qemu.org/Documentation/9psetup#msize for details."
+ );
+ }
+
marshal:
err = pdu_marshal(pdu, offset, "ds", s->msize, &version);
if (err < 0) {
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;
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;
{
const char *devnode = udev_device_get_devnode(device);
- int fd = qemu_open(devnode, O_RDWR);
+ int fd = qemu_open_old(devnode, O_RDWR);
if (fd < 0) {
return -1;
} else if (!u2f_passthru_is_u2f_device(fd)) {
return;
#endif
} else {
- fd = qemu_open(key->hidraw, O_RDWR);
+ fd = qemu_open_old(key->hidraw, O_RDWR);
if (fd < 0) {
error_setg(errp, "%s: Failed to open %s", TYPE_U2F_PASSTHRU,
key->hidraw);
}
}
- 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;
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;
AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
bool has_opaque, const char *opaque,
Error **errp);
-int monitor_fdset_get_fd(int64_t fdset_id, int flags);
-int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd);
+int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags);
void monitor_fdset_dup_fd_remove(int dup_fd);
int64_t monitor_fdset_dup_fd_find(int dup_fd);
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, ...);
+/*
+ * Don't introduce new usage of this function, prefer the following
+ * qemu_open/qemu_create that take an "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
+int qemu_dup_flags(int fd, int flags);
int qemu_dup(int fd);
int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive);
int qemu_unlock_fd(int fd, int64_t start, int64_t len);
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,
return fdinfo;
}
-int monitor_fdset_get_fd(int64_t fdset_id, int flags)
+int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
{
#ifdef _WIN32
return -ENOENT;
#else
MonFdset *mon_fdset;
- MonFdsetFd *mon_fdset_fd;
- int mon_fd_flags;
- int ret;
qemu_mutex_lock(&mon_fdsets_lock);
QLIST_FOREACH(mon_fdset, &mon_fdsets, next) {
+ MonFdsetFd *mon_fdset_fd;
+ MonFdsetFd *mon_fdset_fd_dup;
+ int fd = -1;
+ int dup_fd;
+ int mon_fd_flags;
+
if (mon_fdset->id != fdset_id) {
continue;
}
+
QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) {
mon_fd_flags = fcntl(mon_fdset_fd->fd, F_GETFL);
if (mon_fd_flags == -1) {
- ret = -errno;
- goto out;
+ qemu_mutex_unlock(&mon_fdsets_lock);
+ return -1;
}
if ((flags & O_ACCMODE) == (mon_fd_flags & O_ACCMODE)) {
- ret = mon_fdset_fd->fd;
- goto out;
+ fd = mon_fdset_fd->fd;
+ break;
}
}
- ret = -EACCES;
- goto out;
- }
- ret = -ENOENT;
-
-out:
- qemu_mutex_unlock(&mon_fdsets_lock);
- return ret;
-#endif
-}
-
-int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd)
-{
- MonFdset *mon_fdset;
- MonFdsetFd *mon_fdset_fd_dup;
- qemu_mutex_lock(&mon_fdsets_lock);
- QLIST_FOREACH(mon_fdset, &mon_fdsets, next) {
- if (mon_fdset->id != fdset_id) {
- continue;
+ if (fd == -1) {
+ qemu_mutex_unlock(&mon_fdsets_lock);
+ errno = EACCES;
+ return -1;
}
- QLIST_FOREACH(mon_fdset_fd_dup, &mon_fdset->dup_fds, next) {
- if (mon_fdset_fd_dup->fd == dup_fd) {
- goto err;
- }
+
+ dup_fd = qemu_dup_flags(fd, flags);
+ if (dup_fd == -1) {
+ qemu_mutex_unlock(&mon_fdsets_lock);
+ return -1;
}
+
mon_fdset_fd_dup = g_malloc0(sizeof(*mon_fdset_fd_dup));
mon_fdset_fd_dup->fd = dup_fd;
QLIST_INSERT_HEAD(&mon_fdset->dup_fds, mon_fdset_fd_dup, next);
qemu_mutex_unlock(&mon_fdsets_lock);
- return 0;
+ return dup_fd;
}
-err:
qemu_mutex_unlock(&mon_fdsets_lock);
+ errno = ENOENT;
return -1;
+#endif
}
static int64_t monitor_fdset_dup_fd_find_remove(int dup_fd, bool remove)
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;
}
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);
}
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
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;
}
}
- 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;
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;
}
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));
#include "qemu/osdep.h"
#include "monitor/monitor.h"
-int monitor_fdset_dup_fd_add(int64_t fdset_id, int dup_fd)
+int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
{
+ errno = ENOSYS;
return -1;
}
return -1;
}
-int monitor_fdset_get_fd(int64_t fdset_id, int flags)
-{
- return -ENOENT;
-}
-
void monitor_fdset_dup_fd_remove(int dupfd)
{
}
{
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;
}
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));
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
+#include "qapi/error.h"
/* Needed early for CONFIG_BSD etc. */
/*
* Dups an fd and sets the flags
*/
-static int qemu_dup_flags(int fd, int flags)
+int qemu_dup_flags(int fd, int flags)
{
int ret;
int serrno;
}
#endif
+static int qemu_open_cloexec(const char *name, int flags, mode_t mode)
+{
+ int ret;
+#ifdef O_CLOEXEC
+ ret = open(name, flags | O_CLOEXEC, mode);
+#else
+ ret = open(name, flags, mode);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
+ }
+#endif
+ return ret;
+}
+
/*
* Opens a file with FD_CLOEXEC set
*/
-int qemu_open(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;
/* Attempt dup of fd from fd set */
if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
int64_t fdset_id;
- int fd, dupfd;
+ int dupfd;
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) {
- errno = -fd;
- return -1;
- }
-
- dupfd = qemu_dup_flags(fd, flags);
+ dupfd = monitor_fdset_dup_fd_add(fdset_id, flags);
if (dupfd == -1) {
- return -1;
- }
-
- ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
- if (ret == -1) {
- close(dupfd);
- errno = EINVAL;
+ error_setg_errno(errp, errno, "Could not dup FD for %s flags %x",
+ name, flags);
return -1;
}
}
#endif
- if (flags & O_CREAT) {
- va_list ap;
+ ret = qemu_open_cloexec(name, flags, mode);
- va_start(ap, flags);
- mode = va_arg(ap, int);
- va_end(ap);
+ if (ret == -1) {
+ const char *action = flags & O_CREAT ? "create" : "open";
+#ifdef O_DIRECT
+ /* Give more helpful error message for O_DIRECT */
+ if (errno == EINVAL && (flags & O_DIRECT)) {
+ ret = open(name, flags & ~O_DIRECT, mode);
+ if (ret != -1) {
+ close(ret);
+ error_setg(errp, "Could not %s '%s': "
+ "filesystem does not support O_DIRECT",
+ action, name);
+ errno = EINVAL; /* restore first open()'s errno */
+ return -1;
+ }
+ }
+#endif /* O_DIRECT */
+ error_setg_errno(errp, errno, "Could not %s '%s'",
+ action, name);
}
-#ifdef O_CLOEXEC
- ret = open(name, flags | O_CLOEXEC, mode);
-#else
- ret = open(name, flags, mode);
- if (ret >= 0) {
- qemu_set_cloexec(ret);
+ return ret;
+}
+
+
+int qemu_open(const char *name, int flags, Error **errp)
+{
+ assert(!(flags & O_CREAT));
+
+ return qemu_open_internal(name, flags, 0, errp);
+}
+
+
+int qemu_create(const char *name, int flags, mode_t mode, Error **errp)
+{
+ assert(!(flags & O_CREAT));
+
+ 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);
}
-#endif
+ va_end(ap);
+
+ ret = qemu_open_internal(name, flags, mode, NULL);
#ifdef O_DIRECT
if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {
.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;
projects / mirror_qemu.git / commitdiff