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monitor: Report errors from monitor_fdset_dup_fd_add

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I'm keeping the EACCES because callers expect to be able to look at
errno.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Fabiano Rosas 2024-06-17 15:57:24 -03:00
parent 881172f3f9
commit 960f29b347
4 changed files with 12 additions and 12 deletions
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2
include/monitor/monitor.h
View file

@ -51,7 +51,7 @@ int monitor_read_password(MonitorHMP *mon, ReadLineFunc *readline_func,
AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
const char *opaque, Error **errp);
int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags);
int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags, Error **errp);
void monitor_fdset_dup_fd_remove(int dup_fd);
void monitor_register_hmp(const char *name, bool info,

10
monitor/fds.c
View file

@ -409,9 +409,10 @@ AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
return fdinfo;
}
int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags, Error **errp)
{
#ifdef _WIN32
error_setg(errp, "Platform does not support fd passing (fdset)");
return -ENOENT;
#else
MonFdset *mon_fdset;
@ -431,6 +432,8 @@ int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) {
mon_fd_flags = fcntl(mon_fdset_fd->fd, F_GETFL);
if (mon_fd_flags == -1) {
error_setg(errp, "Failed to read file status flags for fd=%d",
mon_fdset_fd->fd);
return -1;
}
@ -442,11 +445,15 @@ int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
if (fd == -1) {
errno = EACCES;
error_setg(errp,
"Failed to find file descriptor with matching flags=0x%x",
flags);
return -1;
}
dup_fd = qemu_dup_flags(fd, flags);
if (dup_fd == -1) {
error_setg(errp, "Failed to dup() given file descriptor fd=%d", fd);
return -1;
}
@ -456,6 +463,7 @@ int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
return dup_fd;
}
error_setg(errp, "Failed to find fdset /dev/fdset/%" PRId64, fdset_id);
errno = ENOENT;
return -1;
#endif

2
stubs/fdset.c
View file

@ -3,7 +3,7 @@
#include "monitor/monitor.h"
#include "../monitor/monitor-internal.h"
int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags)
int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags, Error **errp)
{
errno = ENOSYS;
return -1;

10
util/osdep.c
View file

@ -310,7 +310,6 @@ qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
/* Attempt dup of fd from fd set */
if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
int64_t fdset_id;
int dupfd;
fdset_id = qemu_parse_fdset(fdset_id_str);
if (fdset_id == -1) {
@ -319,14 +318,7 @@ qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
return -1;
}
dupfd = monitor_fdset_dup_fd_add(fdset_id, flags);
if (dupfd == -1) {
error_setg_errno(errp, errno, "Could not dup FD for %s flags %x",
name, flags);
return -1;
}
return dupfd;
return monitor_fdset_dup_fd_add(fdset_id, flags, errp);
}
#endif