From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54839) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TOBXF-0001EH-Qu for qemu-devel@nongnu.org; Tue, 16 Oct 2012 14:06:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TOBX6-00072K-2R for qemu-devel@nongnu.org; Tue, 16 Oct 2012 14:06:33 -0400 Received: from e8.ny.us.ibm.com ([32.97.182.138]:40857) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TOBX5-000724-U6 for qemu-devel@nongnu.org; Tue, 16 Oct 2012 14:06:23 -0400 Received: from /spool/local by e8.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 16 Oct 2012 14:06:11 -0400 Received: from d01relay03.pok.ibm.com (d01relay03.pok.ibm.com [9.56.227.235]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id E5AFC6E809D for ; Tue, 16 Oct 2012 14:06:02 -0400 (EDT) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q9GI62bN274884 for ; Tue, 16 Oct 2012 14:06:02 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q9GI5efw027058 for ; Tue, 16 Oct 2012 14:05:41 -0400 From: Corey Bryant Date: Tue, 16 Oct 2012 14:05:10 -0400 Message-Id: <1350410713-2260-1-git-send-email-coreyb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v3 1/4] monitor: Allow add-fd to any specified fd set List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, libvir-list@redhat.com, Corey Bryant The first call to add an fd to an fd set was previously not allowed to choose the fd set ID. The ID was generated as the first available and ensuing calls could add more fds by specifying the fd set ID. This change allows users to choose the fd set ID on the first call. Signed-off-by: Corey Bryant --- v2: -This patch is new in v2 v3: -Added fdset-id bounds checking (eblake@redhat.com) -Move 'if (!mon_fdset_cur)' change to this patch (kwolf@redhat.com) -Add break from for loop if fdset_id is less than mon_fdset->id (eblake@redhat.com) monitor.c | 54 +++++++++++++++++++++++++++++++++++++----------------- qapi-schema.json | 2 +- 2 files changed, 38 insertions(+), 18 deletions(-) diff --git a/monitor.c b/monitor.c index 131b325..2e3248f 100644 --- a/monitor.c +++ b/monitor.c @@ -2135,7 +2135,7 @@ AddfdInfo *qmp_add_fd(bool has_fdset_id, int64_t fdset_id, bool has_opaque, { int fd; Monitor *mon = cur_mon; - MonFdset *mon_fdset; + MonFdset *mon_fdset = NULL; MonFdsetFd *mon_fdset_fd; AddfdInfo *fdinfo; @@ -2147,34 +2147,54 @@ AddfdInfo *qmp_add_fd(bool has_fdset_id, int64_t fdset_id, bool has_opaque, if (has_fdset_id) { QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { - if (mon_fdset->id == fdset_id) { + /* Break if match found or match impossible due to ordering by ID */ + if (fdset_id <= mon_fdset->id) { + if (fdset_id < mon_fdset->id) { + mon_fdset = NULL; + } break; } } - if (mon_fdset == NULL) { - error_set(errp, QERR_INVALID_PARAMETER_VALUE, "fdset-id", - "an existing fdset-id"); - goto error; - } - } else { + } + + if (mon_fdset == NULL) { 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; + if (has_fdset_id) { + if (fdset_id < 0) { + error_set(errp, QERR_INVALID_PARAMETER_VALUE, "fdset-id", + "a non-negative value"); + goto error; + } + /* Use specified fdset ID */ + QLIST_FOREACH(mon_fdset, &mon_fdsets, next) { + mon_fdset_cur = mon_fdset; + if (fdset_id < mon_fdset_cur->id) { + break; + } + } + } else { + /* 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; } - break; } mon_fdset = g_malloc0(sizeof(*mon_fdset)); - mon_fdset->id = fdset_id_prev + 1; + if (has_fdset_id) { + mon_fdset->id = fdset_id; + } else { + mon_fdset->id = fdset_id_prev + 1; + } /* The fdset list is ordered by fdset ID */ - if (mon_fdset->id == 0) { + if (!mon_fdset_cur) { 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); diff --git a/qapi-schema.json b/qapi-schema.json index f9dbdae..12cdb74 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -2611,7 +2611,7 @@ # # Returns: @AddfdInfo on success # If file descriptor was not received, FdNotSupplied -# If @fdset-id does not exist, InvalidParameterValue +# If @fdset-id is a negative value, InvalidParameterValue # # Notes: The list of fd sets is shared by all monitor connections. # -- 1.7.11.4