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

On 06/26/2012 04:44 PM, Luiz Capitulino wrote: > 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; > Thanks! I'll do that. I'll assume we still want this patch even if pass-fd support is dropped.

>> --- >> 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 >