diff options
Diffstat (limited to 'monitor/fds.c')
| -rw-r--r-- | monitor/fds.c | 96 |
1 files changed, 47 insertions, 49 deletions
diff --git a/monitor/fds.c b/monitor/fds.c index d86c2c674c..b5416b5b5d 100644 --- a/monitor/fds.c +++ b/monitor/fds.c @@ -43,7 +43,6 @@ struct mon_fd_t { typedef struct MonFdsetFd MonFdsetFd; struct MonFdsetFd { int fd; - bool removed; char *opaque; QLIST_ENTRY(MonFdsetFd) next; }; @@ -167,28 +166,32 @@ int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp) return -1; } -static void monitor_fdset_cleanup(MonFdset *mon_fdset) +static void monitor_fdset_free(MonFdset *mon_fdset) { - MonFdsetFd *mon_fdset_fd; - MonFdsetFd *mon_fdset_fd_next; - - QLIST_FOREACH_SAFE(mon_fdset_fd, &mon_fdset->fds, next, mon_fdset_fd_next) { - if ((mon_fdset_fd->removed || - (QLIST_EMPTY(&mon_fdset->dup_fds) && mon_refcount == 0)) && - runstate_is_running()) { - close(mon_fdset_fd->fd); - g_free(mon_fdset_fd->opaque); - QLIST_REMOVE(mon_fdset_fd, next); - g_free(mon_fdset_fd); - } - } + QLIST_REMOVE(mon_fdset, next); + g_free(mon_fdset); +} +static void monitor_fdset_free_if_empty(MonFdset *mon_fdset) +{ + /* + * Only remove an empty fdset. The fds are owned by the user and + * should have been removed with qmp_remove_fd(). The dup_fds are + * owned by QEMU and should have been removed with qemu_close(). + */ if (QLIST_EMPTY(&mon_fdset->fds) && QLIST_EMPTY(&mon_fdset->dup_fds)) { - QLIST_REMOVE(mon_fdset, next); - g_free(mon_fdset); + monitor_fdset_free(mon_fdset); } } +static void monitor_fdset_fd_free(MonFdsetFd *mon_fdset_fd) +{ + close(mon_fdset_fd->fd); + g_free(mon_fdset_fd->opaque); + QLIST_REMOVE(mon_fdset_fd, next); + g_free(mon_fdset_fd); +} + void monitor_fdsets_cleanup(void) { MonFdset *mon_fdset; @@ -196,7 +199,7 @@ void monitor_fdsets_cleanup(void) QEMU_LOCK_GUARD(&mon_fdsets_lock); QLIST_FOREACH_SAFE(mon_fdset, &mon_fdsets, next, mon_fdset_next) { - monitor_fdset_cleanup(mon_fdset); + monitor_fdset_free_if_empty(mon_fdset); } } @@ -263,7 +266,7 @@ void qmp_get_win32_socket(const char *infos, const char *fdname, Error **errp) void qmp_remove_fd(int64_t fdset_id, bool has_fd, int64_t fd, Error **errp) { MonFdset *mon_fdset; - MonFdsetFd *mon_fdset_fd; + MonFdsetFd *mon_fdset_fd, *mon_fdset_fd_next; char fd_str[60]; QEMU_LOCK_GUARD(&mon_fdsets_lock); @@ -271,21 +274,22 @@ void qmp_remove_fd(int64_t fdset_id, bool has_fd, int64_t fd, Error **errp) if (mon_fdset->id != fdset_id) { continue; } - QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) { + QLIST_FOREACH_SAFE(mon_fdset_fd, &mon_fdset->fds, next, + mon_fdset_fd_next) { if (has_fd) { if (mon_fdset_fd->fd != fd) { continue; } - mon_fdset_fd->removed = true; + monitor_fdset_fd_free(mon_fdset_fd); break; } else { - mon_fdset_fd->removed = true; + monitor_fdset_fd_free(mon_fdset_fd); } } if (has_fd && !mon_fdset_fd) { goto error; } - monitor_fdset_cleanup(mon_fdset); + monitor_fdset_free_if_empty(mon_fdset); return; } @@ -395,7 +399,6 @@ AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id, mon_fdset_fd = g_malloc0(sizeof(*mon_fdset_fd)); mon_fdset_fd->fd = fd; - mon_fdset_fd->removed = false; mon_fdset_fd->opaque = g_strdup(opaque); QLIST_INSERT_HEAD(&mon_fdset->fds, mon_fdset_fd, next); @@ -406,9 +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; @@ -420,6 +424,11 @@ int monitor_fdset_dup_fd_add(int64_t fdset_id, int flags) int fd = -1; int dup_fd; int mon_fd_flags; + int mask = O_ACCMODE; + +#ifdef O_DIRECT + mask |= O_DIRECT; +#endif if (mon_fdset->id != fdset_id) { continue; @@ -428,10 +437,12 @@ 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; } - if ((flags & O_ACCMODE) == (mon_fd_flags & O_ACCMODE)) { + if ((flags & mask) == (mon_fd_flags & mask)) { fd = mon_fdset_fd->fd; break; } @@ -439,11 +450,15 @@ 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; } @@ -453,12 +468,13 @@ 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 } -static int64_t monitor_fdset_dup_fd_find_remove(int dup_fd, bool remove) +void monitor_fdset_dup_fd_remove(int dup_fd) { MonFdset *mon_fdset; MonFdsetFd *mon_fdset_fd_dup; @@ -467,31 +483,13 @@ static int64_t monitor_fdset_dup_fd_find_remove(int dup_fd, bool remove) QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { QLIST_FOREACH(mon_fdset_fd_dup, &mon_fdset->dup_fds, next) { if (mon_fdset_fd_dup->fd == dup_fd) { - if (remove) { - QLIST_REMOVE(mon_fdset_fd_dup, next); - g_free(mon_fdset_fd_dup); - if (QLIST_EMPTY(&mon_fdset->dup_fds)) { - monitor_fdset_cleanup(mon_fdset); - } - return -1; - } else { - return mon_fdset->id; - } + QLIST_REMOVE(mon_fdset_fd_dup, next); + g_free(mon_fdset_fd_dup); + monitor_fdset_free_if_empty(mon_fdset); + return; } } } - - return -1; -} - -int64_t monitor_fdset_dup_fd_find(int dup_fd) -{ - return monitor_fdset_dup_fd_find_remove(dup_fd, false); -} - -void monitor_fdset_dup_fd_remove(int dup_fd) -{ - monitor_fdset_dup_fd_find_remove(dup_fd, true); } int monitor_fd_param(Monitor *mon, const char *fdname, Error **errp) |