* [Qemu-devel] [PATCH 1/3] qmp: dump-guest-memory: improve schema doc
2012-07-13 16:53 [Qemu-devel] [PULL 0/3]: QMP queue Luiz Capitulino
@ 2012-07-13 16:53 ` Luiz Capitulino
2012-07-13 16:53 ` [Qemu-devel] [PATCH 2/3] qapi: input_type_enum(): fix error message Luiz Capitulino
2012-07-13 16:53 ` [Qemu-devel] [PATCH 3/3] qapi: Convert getfd and closefd Luiz Capitulino
2 siblings, 0 replies; 4+ messages in thread
From: Luiz Capitulino @ 2012-07-13 16:53 UTC (permalink / raw)
To: aliguori; +Cc: qemu-devel
Clarify a few points and makes it looks more like the other commands'
documentation.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
qapi-schema.json | 32 +++++++++++++++++---------------
1 file changed, 17 insertions(+), 15 deletions(-)
diff --git a/qapi-schema.json b/qapi-schema.json
index 1ab5dbd..5252452 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1789,34 +1789,36 @@
#
# Dump guest's memory to vmcore. It is a synchronous operation that can take
# very long depending on the amount of guest memory. This command is only
-# supported only on i386 and x86_64
-#
-# @paging: if true, do paging to get guest's memory mapping. The @paging's
-# default value of @paging is false, If you want to use gdb to process the
-# core, please set @paging to true. The reason why the @paging's value is
-# false:
-# 1. guest machine in a catastrophic state can have corrupted memory,
-# which we cannot trust.
-# 2. The guest machine can be in read-mode even if paging is enabled.
-# For example: the guest machine uses ACPI to sleep, and ACPI sleep
-# state goes in real-mode
+# supported on i386 and x86_64.
+#
+# @paging: if true, do paging to get guest's memory mapping. This allows
+# using gdb to process the core file. However, setting @paging to false
+# may be desirable because of two reasons:
+#
+# 1. The guest may be in a catastrophic state or can have corrupted
+# memory, which cannot be trusted
+# 2. The guest can be in real-mode even if paging is enabled. For example,
+# the guest uses ACPI to sleep, and ACPI sleep state goes in real-mode
+#
# @protocol: the filename or file descriptor of the vmcore. The supported
-# protocol can be file or fd:
+# protocols are:
+#
# 1. file: the protocol starts with "file:", and the following string is
# the file's path.
# 2. fd: the protocol starts with "fd:", and the following string is the
# fd's name.
+#
# @begin: #optional if specified, the starting physical address.
+#
# @length: #optional if specified, the memory size, in bytes. If you don't
-# want to dump all guest's memory, please specify the start @begin and
-# @length
+# want to dump all guest's memory, please specify the start @begin and @length
#
# Returns: nothing on success
# If @begin contains an invalid address, InvalidParameter
# If only one of @begin and @length is specified, MissingParameter
# If @protocol stats with "fd:", and the fd cannot be found, FdNotFound
# If @protocol starts with "file:", and the file cannot be
-# opened, OpenFileFailed
+# opened, OpenFileFailed
# If @protocol does not start with "fd:" or "file:", InvalidParameter
# If an I/O error occurs while writing the file, IOError
# If the target does not support this command, Unsupported
--
1.7.11.1.116.g8228a23
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [Qemu-devel] [PATCH 3/3] qapi: Convert getfd and closefd
2012-07-13 16:53 [Qemu-devel] [PULL 0/3]: QMP queue Luiz Capitulino
2012-07-13 16:53 ` [Qemu-devel] [PATCH 1/3] qmp: dump-guest-memory: improve schema doc Luiz Capitulino
2012-07-13 16:53 ` [Qemu-devel] [PATCH 2/3] qapi: input_type_enum(): fix error message Luiz Capitulino
@ 2012-07-13 16:53 ` Luiz Capitulino
2 siblings, 0 replies; 4+ messages in thread
From: Luiz Capitulino @ 2012-07-13 16:53 UTC (permalink / raw)
To: aliguori; +Cc: Corey Bryant, qemu-devel
From: Corey Bryant <coreyb@linux.vnet.ibm.com>
Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
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 4c6d4ae..6b72a64 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1002,3 +1002,21 @@ 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 f6107ba..522c88b 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2328,48 +2328,45 @@ 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;
}
@@ -2378,11 +2375,10 @@ 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 5252452..a92adb1 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1870,3 +1870,38 @@
# 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
--
1.7.11.1.116.g8228a23
^ permalink raw reply related [flat|nested] 4+ messages in thread