diff options
Diffstat (limited to 'monitor.c')
| -rw-r--r-- | monitor.c | 189 |
1 files changed, 189 insertions, 0 deletions
@@ -140,6 +140,23 @@ struct mon_fd_t { QLIST_ENTRY(mon_fd_t) next; }; +/* file descriptor associated with a file descriptor set */ +typedef struct MonFdsetFd MonFdsetFd; +struct MonFdsetFd { + int fd; + bool removed; + char *opaque; + QLIST_ENTRY(MonFdsetFd) next; +}; + +/* file descriptor set containing fds passed via SCM_RIGHTS */ +typedef struct MonFdset MonFdset; +struct MonFdset { + int64_t id; + QLIST_HEAD(, MonFdsetFd) fds; + QLIST_ENTRY(MonFdset) next; +}; + typedef struct MonitorControl { QObject *id; JSONMessageParser parser; @@ -181,6 +198,7 @@ struct Monitor { #define QMP_ACCEPT_UNKNOWNS 1 static QLIST_HEAD(mon_list, Monitor) mon_list; +static QLIST_HEAD(mon_fdsets, MonFdset) mon_fdsets; static mon_cmd_t mon_cmds[]; static mon_cmd_t info_cmds[]; @@ -2366,6 +2384,177 @@ int monitor_get_fd(Monitor *mon, const char *fdname) return -1; } +static void monitor_fdset_cleanup(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) { + close(mon_fdset_fd->fd); + g_free(mon_fdset_fd->opaque); + QLIST_REMOVE(mon_fdset_fd, next); + g_free(mon_fdset_fd); + } + } + + if (QLIST_EMPTY(&mon_fdset->fds)) { + QLIST_REMOVE(mon_fdset, next); + g_free(mon_fdset); + } +} + +AddfdInfo *qmp_add_fd(bool has_fdset_id, int64_t fdset_id, bool has_opaque, + const char *opaque, Error **errp) +{ + int fd; + Monitor *mon = cur_mon; + MonFdset *mon_fdset; + MonFdsetFd *mon_fdset_fd; + AddfdInfo *fdinfo; + + fd = qemu_chr_fe_get_msgfd(mon->chr); + if (fd == -1) { + error_set(errp, QERR_FD_NOT_SUPPLIED); + goto error; + } + + if (has_fdset_id) { + QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { + if (mon_fdset->id == fdset_id) { + break; + } + } + if (mon_fdset == NULL) { + error_set(errp, QERR_INVALID_PARAMETER_VALUE, "fdset-id", + "an existing fdset-id"); + goto error; + } + } else { + int64_t fdset_id_prev = -1; + MonFdset *mon_fdset_cur = QLIST_FIRST(&mon_fdsets); + + /* Use first available fdset ID */ + QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { + mon_fdset_cur = mon_fdset; + if (fdset_id_prev == mon_fdset_cur->id - 1) { + fdset_id_prev = mon_fdset_cur->id; + continue; + } + break; + } + + mon_fdset = g_malloc0(sizeof(*mon_fdset)); + mon_fdset->id = fdset_id_prev + 1; + + /* The fdset list is ordered by fdset ID */ + if (mon_fdset->id == 0) { + QLIST_INSERT_HEAD(&mon_fdsets, mon_fdset, next); + } else if (mon_fdset->id < mon_fdset_cur->id) { + QLIST_INSERT_BEFORE(mon_fdset_cur, mon_fdset, next); + } else { + QLIST_INSERT_AFTER(mon_fdset_cur, mon_fdset, next); + } + } + + mon_fdset_fd = g_malloc0(sizeof(*mon_fdset_fd)); + mon_fdset_fd->fd = fd; + mon_fdset_fd->removed = false; + if (has_opaque) { + mon_fdset_fd->opaque = g_strdup(opaque); + } + QLIST_INSERT_HEAD(&mon_fdset->fds, mon_fdset_fd, next); + + fdinfo = g_malloc0(sizeof(*fdinfo)); + fdinfo->fdset_id = mon_fdset->id; + fdinfo->fd = mon_fdset_fd->fd; + + return fdinfo; + +error: + if (fd != -1) { + close(fd); + } + return NULL; +} + +void qmp_remove_fd(int64_t fdset_id, bool has_fd, int64_t fd, Error **errp) +{ + MonFdset *mon_fdset; + MonFdsetFd *mon_fdset_fd; + char fd_str[60]; + + QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { + if (mon_fdset->id != fdset_id) { + continue; + } + QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) { + if (has_fd) { + if (mon_fdset_fd->fd != fd) { + continue; + } + mon_fdset_fd->removed = true; + break; + } else { + mon_fdset_fd->removed = true; + } + } + if (has_fd && !mon_fdset_fd) { + goto error; + } + monitor_fdset_cleanup(mon_fdset); + return; + } + +error: + if (has_fd) { + snprintf(fd_str, sizeof(fd_str), "fdset-id:%" PRId64 ", fd:%" PRId64, + fdset_id, fd); + } else { + snprintf(fd_str, sizeof(fd_str), "fdset-id:%" PRId64, fdset_id); + } + error_set(errp, QERR_FD_NOT_FOUND, fd_str); +} + +FdsetInfoList *qmp_query_fdsets(Error **errp) +{ + MonFdset *mon_fdset; + MonFdsetFd *mon_fdset_fd; + FdsetInfoList *fdset_list = NULL; + + QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { + FdsetInfoList *fdset_info = g_malloc0(sizeof(*fdset_info)); + FdsetFdInfoList *fdsetfd_list = NULL; + + fdset_info->value = g_malloc0(sizeof(*fdset_info->value)); + fdset_info->value->fdset_id = mon_fdset->id; + + QLIST_FOREACH(mon_fdset_fd, &mon_fdset->fds, next) { + FdsetFdInfoList *fdsetfd_info; + + fdsetfd_info = g_malloc0(sizeof(*fdsetfd_info)); + fdsetfd_info->value = g_malloc0(sizeof(*fdsetfd_info->value)); + fdsetfd_info->value->fd = mon_fdset_fd->fd; + if (mon_fdset_fd->opaque) { + fdsetfd_info->value->has_opaque = true; + fdsetfd_info->value->opaque = g_strdup(mon_fdset_fd->opaque); + } else { + fdsetfd_info->value->has_opaque = false; + } + + fdsetfd_info->next = fdsetfd_list; + fdsetfd_list = fdsetfd_info; + } + + fdset_info->value->fds = fdsetfd_list; + + fdset_info->next = fdset_list; + fdset_list = fdset_info; + } + + return fdset_list; +} + /* mon_cmds and info_cmds would be sorted at runtime */ static mon_cmd_t mon_cmds[] = { #include "hmp-commands.h" |