Re: [libvirt] [PATCH v4 2/7] qapi: Convert getfd and closefd

On Fri, 22 Jun 2012 14:36:09 -0400 Corey Bryant <coreyb(a)linux.vnet.ibm.com&gt; wrote: > Signed-off-by: Corey Bryant <coreyb(a)linux.vnet.ibm.com&gt; If this patch doesn't change anymore you can add: Reviewed-by: Luiz Capitulino <lcapitulino(a)redhat.com&gt;

> --- > v2: > -Convert getfd and closefd to QAPI (lcapitulino(a)redhat.com) > -Remove changes that returned fd from getfd (lcapitulino(a)redhat.com) > -Wrap hmp_* functions around qmp_* functions (kwolf(a)redhat.com) > -Move hmp_* functions to hmp.c (lcapitulino(a)redhat.com) > -Drop .user_print lines (lcapitulino(a)redhat.com) > -Use 'cmd' instead of 'cmd_new' for HMP (lcapitulino(a)redhat.com) > -Change QMP command existance back to 0.14 (lcapitulino(a)redhat.com) > > v3: > -Remove unnecessary return statements from qmp_* functions > (lcapitulino(a)redhat.com) > -Add notes to QMP command describing behavior in more detail > (lcapitulino(a)redhat.com, eblake(a)redhat.com) > > v4: > -No changes > > hmp-commands.hx | 6 ++---- > hmp.c | 18 ++++++++++++++++++ > hmp.h | 2 ++ > monitor.c | 32 ++++++++++++++------------------ > qapi-schema.json | 35 +++++++++++++++++++++++++++++++++++ > qmp-commands.hx | 14 ++++++++++---- > 6 files changed, 81 insertions(+), 26 deletions(-) > > diff --git a/hmp-commands.hx b/hmp-commands.hx > index f5d9d91..eea8b32 100644 > --- a/hmp-commands.hx > +++ b/hmp-commands.hx > @@ -1236,8 +1236,7 @@ ETEXI > .args_type = "fdname:s", > .params = "getfd name", > .help = "receive a file descriptor via SCM rights and assign it a name", > - .user_print = monitor_user_noop, > - .mhandler.cmd_new = do_getfd, > + .mhandler.cmd = hmp_getfd, > }, > > STEXI > @@ -1253,8 +1252,7 @@ ETEXI > .args_type = "fdname:s", > .params = "closefd name", > .help = "close a file descriptor previously passed via SCM rights", > - .user_print = monitor_user_noop, > - .mhandler.cmd_new = do_closefd, > + .mhandler.cmd = hmp_closefd, > }, > > STEXI > diff --git a/hmp.c b/hmp.c > index 2ce8cb9..6241856 100644 > --- a/hmp.c > +++ b/hmp.c > @@ -999,3 +999,21 @@ void hmp_netdev_del(Monitor *mon, const QDict *qdict) > qmp_netdev_del(id, &err); > hmp_handle_error(mon, &err); > } > + > +void hmp_getfd(Monitor *mon, const QDict *qdict) > +{ > + const char *fdname = qdict_get_str(qdict, "fdname"); > + Error *errp = NULL; > + > + qmp_getfd(fdname, &errp); > + hmp_handle_error(mon, &errp); > +} > + > +void hmp_closefd(Monitor *mon, const QDict *qdict) > +{ > + const char *fdname = qdict_get_str(qdict, "fdname"); > + Error *errp = NULL; > + > + qmp_closefd(fdname, &errp); > + hmp_handle_error(mon, &errp); > +} > diff --git a/hmp.h b/hmp.h > index 79d138d..8d2b0d7 100644 > --- a/hmp.h > +++ b/hmp.h > @@ -64,5 +64,7 @@ void hmp_device_del(Monitor *mon, const QDict *qdict); > void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict); > void hmp_netdev_add(Monitor *mon, const QDict *qdict); > void hmp_netdev_del(Monitor *mon, const QDict *qdict); > +void hmp_getfd(Monitor *mon, const QDict *qdict); > +void hmp_closefd(Monitor *mon, const QDict *qdict); > > #endif > diff --git a/monitor.c b/monitor.c > index a3bc2c7..1a7f7e7 100644 > --- a/monitor.c > +++ b/monitor.c > @@ -2182,48 +2182,45 @@ static void do_inject_mce(Monitor *mon, const QDict *qdict) > } > #endif > > -static int do_getfd(Monitor *mon, const QDict *qdict, QObject **ret_data) > +void qmp_getfd(const char *fdname, Error **errp) > { > - const char *fdname = qdict_get_str(qdict, "fdname"); > mon_fd_t *monfd; > int fd; > > - fd = qemu_chr_fe_get_msgfd(mon->chr); > + fd = qemu_chr_fe_get_msgfd(cur_mon->chr); > if (fd == -1) { > - qerror_report(QERR_FD_NOT_SUPPLIED); > - return -1; > + error_set(errp, QERR_FD_NOT_SUPPLIED); > + return; > } > > if (qemu_isdigit(fdname[0])) { > - qerror_report(QERR_INVALID_PARAMETER_VALUE, "fdname", > - "a name not starting with a digit"); > - return -1; > + error_set(errp, QERR_INVALID_PARAMETER_VALUE, "fdname", > + "a name not starting with a digit"); > + return; > } > > - QLIST_FOREACH(monfd, &mon->fds, next) { > + QLIST_FOREACH(monfd, &cur_mon->fds, next) { > if (strcmp(monfd->name, fdname) != 0) { > continue; > } > > close(monfd->fd); > monfd->fd = fd; > - return 0; > + return; > } > > monfd = g_malloc0(sizeof(mon_fd_t)); > monfd->name = g_strdup(fdname); > monfd->fd = fd; > > - QLIST_INSERT_HEAD(&mon->fds, monfd, next); > - return 0; > + QLIST_INSERT_HEAD(&cur_mon->fds, monfd, next); > } > > -static int do_closefd(Monitor *mon, const QDict *qdict, QObject **ret_data) > +void qmp_closefd(const char *fdname, Error **errp) > { > - const char *fdname = qdict_get_str(qdict, "fdname"); > mon_fd_t *monfd; > > - QLIST_FOREACH(monfd, &mon->fds, next) { > + QLIST_FOREACH(monfd, &cur_mon->fds, next) { > if (strcmp(monfd->name, fdname) != 0) { > continue; > } > @@ -2232,11 +2229,10 @@ static int do_closefd(Monitor *mon, const QDict *qdict, QObject **ret_data) > close(monfd->fd); > g_free(monfd->name); > g_free(monfd); > - return 0; > + return; > } > > - qerror_report(QERR_FD_NOT_FOUND, fdname); > - return -1; > + error_set(errp, QERR_FD_NOT_FOUND, fdname); > } > > static void do_loadvm(Monitor *mon, const QDict *qdict) > diff --git a/qapi-schema.json b/qapi-schema.json > index 3b6e346..26a6b84 100644 > --- a/qapi-schema.json > +++ b/qapi-schema.json > @@ -1862,3 +1862,38 @@ > # Since: 0.14.0 > ## > { 'command': 'netdev_del', 'data': {'id': 'str'} } > + > +## > +# @getfd: > +# > +# Receive a file descriptor via SCM rights and assign it a name > +# > +# @fdname: file descriptor name > +# > +# Returns: Nothing on success > +# If file descriptor was not received, FdNotSupplied > +# If @fdname is not valid, InvalidParameterType > +# > +# Since: 0.14.0 > +# > +# Notes: If @fdname already exists, the file descriptor assigned to > +# it will be closed and replaced by the received file > +# descriptor. > +# The 'closefd' command can be used to explicitly close the > +# file descriptor when it is no longer needed. > +## > +{ 'command': 'getfd', 'data': {'fdname': 'str'} } > + > +## > +# @closefd: > +# > +# Close a file descriptor previously passed via SCM rights > +# > +# @fdname: file descriptor name > +# > +# Returns: Nothing on success > +# If @fdname is not found, FdNotFound > +# > +# Since: 0.14.0 > +## > +{ 'command': 'closefd', 'data': {'fdname': 'str'} } > diff --git a/qmp-commands.hx b/qmp-commands.hx > index 2e1a38e..e3cf3c5 100644 > --- a/qmp-commands.hx > +++ b/qmp-commands.hx > @@ -873,8 +873,7 @@ EQMP > .args_type = "fdname:s", > .params = "getfd name", > .help = "receive a file descriptor via SCM rights and assign it a name", > - .user_print = monitor_user_noop, > - .mhandler.cmd_new = do_getfd, > + .mhandler.cmd_new = qmp_marshal_input_getfd, > }, > > SQMP > @@ -892,6 +891,14 @@ Example: > -> { "execute": "getfd", "arguments": { "fdname": "fd1" } } > <- { "return": {} } > > +Notes: > + > +(1) If the name specified by the "fdname" argument already exists, > + the file descriptor assigned to it will be closed and replaced > + by the received file descriptor. > +(2) The 'closefd' command can be used to explicitly close the file > + descriptor when it is no longer needed. > + > EQMP > > { > @@ -899,8 +906,7 @@ EQMP > .args_type = "fdname:s", > .params = "closefd name", > .help = "close a file descriptor previously passed via SCM rights", > - .user_print = monitor_user_noop, > - .mhandler.cmd_new = do_closefd, > + .mhandler.cmd_new = qmp_marshal_input_closefd, > }, > > SQMP