Signed-off-by: Lei Li <li...@linux.vnet.ibm.com>
---
hmp-commands.hx | 15 +++++++++++++++
hmp.c | 13 +++++++++++++
hmp.h | 1 +
qapi-schema.json | 41 +++++++++++++++++++++++++++++++++++++++++
qemu-char.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
qmp-commands.hx | 34 ++++++++++++++++++++++++++++++++++
6 files changed, 152 insertions(+), 0 deletions(-)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 010b8c9..a60ba69 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -840,6 +840,21 @@ Inject an NMI on the given CPU (x86 only).
ETEXI
{
+ .name = "memchar_write",
+ .args_type = "chardev:s,data:s",
+ .params = "chardev data",
+ .mhandler.cmd = hmp_memchar_write,
+ },
+
+STEXI
+@item memchar_write @var{chardev} @var{data}
+@findex memchar_write
+Provide writing interface for CirMemCharDriver. Write @var{data}
+to char device 'memory'.
+
+ETEXI
+
+ {
.name = "migrate",
.args_type = "detach:-d,blk:-b,inc:-i,uri:s",
.params = "[-d] [-b] [-i] uri",
diff --git a/hmp.c b/hmp.c
index 180ba2b..05b8c21 100644
--- a/hmp.c
+++ b/hmp.c
@@ -683,6 +683,19 @@ void hmp_pmemsave(Monitor *mon, const QDict *qdict)
hmp_handle_error(mon, &errp);
}
+void hmp_memchar_write(Monitor *mon, const QDict *qdict)
+{
+ uint32_t size;
+ const char *chardev = qdict_get_str(qdict, "chardev");
+ const char *data = qdict_get_str(qdict, "data");
+ Error *errp = NULL;
+
+ size = strlen(data);
+ qmp_memchar_write(chardev, size, data, false, 0, &errp);
+
+ hmp_handle_error(mon, &errp);
+}
+
static void hmp_cont_cb(void *opaque, int err)
{
if (!err) {
diff --git a/hmp.h b/hmp.h
index 0ab03be..3ea9896 100644
--- a/hmp.h
+++ b/hmp.h
@@ -43,6 +43,7 @@ void hmp_system_powerdown(Monitor *mon, const QDict *qdict);
void hmp_cpu(Monitor *mon, const QDict *qdict);
void hmp_memsave(Monitor *mon, const QDict *qdict);
void hmp_pmemsave(Monitor *mon, const QDict *qdict);
+void hmp_memchar_write(Monitor *mon, const QDict *qdict);
void hmp_cont(Monitor *mon, const QDict *qdict);
void hmp_system_wakeup(Monitor *mon, const QDict *qdict);
void hmp_inject_nmi(Monitor *mon, const QDict *qdict);
diff --git a/qapi-schema.json b/qapi-schema.json
index 5dfa052..d9fd635 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -325,6 +325,47 @@
{ 'command': 'query-chardev', 'returns': ['ChardevInfo'] }
##
+# @DataFormat:
+#
+# An enumeration of data format.
+#
+# @utf8: The data format is 'utf8'.
+#
+# @base64: The data format is 'base64'.
+#
+# Since: 1.4
+##
+{ 'enum': 'DataFormat'
+ 'data': [ 'utf8', 'base64' ] }
+
+##
+# @memchar-write:
+#
+# Provide writing interface for memchardev. Write data to char
+# device 'memory'.
+#
+# @chardev: the name of the memory char device.
+#
+# @size: the size to write in bytes.
+#
+# @data: the source data write to memchar.
+#
+# @format: #optional the format of the data write to chardev 'memory',
+# by default is 'utf8'.
+#
+# Returns: Nothing on success
+# If @chardev is not a valid char device, DeviceNotFound
+#
+# Notes: For now assume 'drop' behaver, which would result in writes
+# dropping queued data.
+#
+# Since: 1.4
+##
+{ 'command': 'memchar-write',
+ 'data': {'chardev': 'str', 'size': 'int', 'data': 'str',
+ '*format': 'DataFormat'} }
+
+##
# @CommandInfo:
#
# Information about a QMP command
diff --git a/qemu-char.c b/qemu-char.c
index 3e45ce6..a407087 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2724,6 +2724,54 @@ fail:
return NULL;
}
+static bool qemu_is_chr(const CharDriverState *chr, const char *filename)
+{
+ return strcmp(chr->filename, filename);
+}
+
+void qmp_memchar_write(const char *chardev, int64_t size,
+ const char *data, bool has_format,
+ enum DataFormat format,
+ Error **errp)
+{
+ CharDriverState *chr;
+ guchar *write_data;
+ int ret;
+ gsize write_count;
+
+ chr = qemu_chr_find(chardev);
+ if (!chr) {
+ error_set(errp, QERR_DEVICE_NOT_FOUND, chardev);
+ return;
+ }
+
+ if (qemu_is_chr(chr, "memory")) {
+ error_setg(errp,"%s is not memory char device\n", chardev);
+ return;
+ }
+
+ /* XXX: Drop the coming data when the buffer is full. */
+ if (cirmem_chr_is_full(chr)) {
+ error_setg(errp, "Memory device %s is full", chardev);
+ return;
+ }
+
+ write_count = (gsize)size;
+
+ if (has_format && (format == DATA_FORMAT_BASE64)) {
+ write_data = g_base64_decode(data, &write_count);
+ } else {
+ write_data = (uint8_t *)data;
+ }
+
+ ret = cirmem_chr_write(chr, write_data, write_count);
+
+ if (ret < 0) {
+ error_setg(errp, "Failed to write to device %s", chardev);
+ return;
+ }
+}
+
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
{
char host[65], port[33], width[8], height[8];
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 5c692d0..ae3ab5a 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -466,6 +466,40 @@ Note: inject-nmi fails when the guest doesn't support
injecting.
EQMP
{
+ .name = "memchar-write",
+ .args_type = "chardev:s,size:i,data:s,format:s?",
+ .help = "write size of data to memory chardev",
+ .mhandler.cmd_new = qmp_marshal_input_memchar_write,
+ },
+
+SQMP
+memchar-write
+-------------
+
+Provide writing interface for CirMemCharDriver. Write data to memory
+char device.
+
+Arguments:
+
+- "chardev": the name of the char device, must be unique (json-string)
+- "size": the memory size, in bytes, should be power of 2 (json-int)
+- "data": the source data write to memory (json-string)
+- "format": the data format write to memory, default is
+ utf8. (json-string, optional)
+ - Possible values: "utf8", "base64"
+
+Example:
+
+-> { "execute": "memchar-write",
+ "arguments": { "chardev": foo,
+ "size": 8,
+ "data": "abcdefgh",
+ "format": "utf8" } }
+<- { "return": {} }
+
+EQMP
+
+ {
.name = "xen-save-devices-state",
.args_type = "filename:F",
.mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
--
1.7.7.6
