Message ID | 1358931972-12534-4-git-send-email-lilei@linux.vnet.ibm.com |
---|---|
State | New |
Headers | show |
On Wed, 23 Jan 2013 17:06:12 +0800 Lei Li <lilei@linux.vnet.ibm.com> wrote: > Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com> > --- > hmp-commands.hx | 21 +++++++++++++++++++++ > hmp.c | 17 +++++++++++++++++ > hmp.h | 1 + > qapi-schema.json | 36 ++++++++++++++++++++++++++++++++++++ > qemu-char.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ > qmp-commands.hx | 33 +++++++++++++++++++++++++++++++++ > 6 files changed, 156 insertions(+), 0 deletions(-) > > diff --git a/hmp-commands.hx b/hmp-commands.hx > index bcfea11..bdd48f3 100644 > --- a/hmp-commands.hx > +++ b/hmp-commands.hx > @@ -858,6 +858,27 @@ to char device 'memory'. > ETEXI > > { > + .name = "memchar_read", > + .args_type = "device:s,size:i", > + .params = "device size", > + .help = "Provide read interface for CirMemCharDriver. Read from" > + "it and return the data with size.", > + .mhandler.cmd = hmp_memchar_read, > + }, > + > +STEXI > +@item memchar_read @var{device} > +@findex memchar_read > +Provide read interface for CirMemCharDriver. Read from char device > +'memory' and return the data. > + > +@var{size} is the size of data want to read from. Refer to unencoded > +size of the raw data, would adjust to the init size of the memchar > +if the requested size is larger than it. > + > +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 647316a..1f1df5d 100644 > --- a/hmp.c > +++ b/hmp.c > @@ -697,6 +697,23 @@ void hmp_memchar_write(Monitor *mon, const QDict *qdict) > hmp_handle_error(mon, &errp); > } > > +void hmp_memchar_read(Monitor *mon, const QDict *qdict) > +{ > + uint32_t size = qdict_get_int(qdict, "size"); > + const char *chardev = qdict_get_str(qdict, "device"); > + MemCharRead *meminfo; > + Error *errp = NULL; > + > + meminfo = qmp_memchar_read(chardev, size, false, 0, &errp); > + if (errp) { > + monitor_printf(mon, "%s\n", error_get_pretty(errp)); > + error_free(errp); > + return; > + } > + > + monitor_printf(mon, "%s, \n", meminfo->data); > +} > + > static void hmp_cont_cb(void *opaque, int err) > { > if (!err) { > diff --git a/hmp.h b/hmp.h > index 06d6ea2..076d8cf 100644 > --- a/hmp.h > +++ b/hmp.h > @@ -44,6 +44,7 @@ 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_memchar_read(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 8202311..ad4e276 100644 > --- a/qapi-schema.json > +++ b/qapi-schema.json > @@ -363,6 +363,42 @@ > '*format': 'DataFormat'} } > > ## > +# @MemCharRead > +# > +# Result of QMP command memchar-read. > +# > +# @data: The data read from memchar as string. > +# > +# @count: The numbers of bytes read from. > +# > +# Since: 1.4 > +## > +{ 'type': 'MemCharRead', > + 'data': { 'data': 'str', 'count': 'int' } } > + > +## > +# @memchar-read: > +# > +# Provide read interface for memchardev. Read from the char > +# device 'memory' and return the data. > +# > +# @device: the name of the memory char device. > +# > +# @size: the size to read in bytes. > +# > +# @format: #optional the format of the data want to read from > +# memchardev, by default is 'utf8'. > +# > +# Returns: @MemCharRead > +# If @device is not a valid memchr device, DeviceNotFound > +# > +# Since: 1.4 > +## > +{ 'command': 'memchar-read', > + 'data': {'device': 'str', 'size': 'int', '*format': 'DataFormat'}, > + 'returns': 'MemCharRead' } > + > +## > # @CommandInfo: > # > # Information about a QMP command > diff --git a/qemu-char.c b/qemu-char.c > index dbd1a7c..c45397a 100644 > --- a/qemu-char.c > +++ b/qemu-char.c > @@ -2790,6 +2790,54 @@ void qmp_memchar_write(const char *device, int64_t size, > } > } > > +MemCharRead *qmp_memchar_read(const char *device, int64_t size, > + bool has_format, enum DataFormat format, > + Error **errp) > +{ > + CharDriverState *chr; > + guchar *read_data; > + MemCharRead *meminfo; > + size_t count; > + > + chr = qemu_chr_find(device); > + if (!chr) { > + error_set(errp, QERR_DEVICE_NOT_FOUND, device); > + return NULL; > + } > + > + if (qemu_is_chr(chr, "memory")) { > + error_setg(errp,"%s is not memory char device", device); > + return NULL; > + } > + > + if (size <= 0) { > + error_setg(errp, "size must be greater than zero"); > + return NULL; > + } > + > + /* Return empty strings when the buffer is empty. */ > + if (cirmem_chr_is_empty(chr)) { > + return NULL; > + } You can't just return NULL here, if you have to return MemCharRead. It's not a problem to have an empty data and 0 size. > + > + count = qemu_chr_cirmem_count(chr); > + size = size > count ? count : size; > + read_data = g_malloc0(size + 1); > + > + meminfo = g_malloc0(sizeof(MemCharRead)); > + meminfo->count = cirmem_chr_read(chr, read_data, size); > + > + if (has_format && (format == DATA_FORMAT_BASE64)) { > + if (read_data) { > + meminfo->data = g_base64_encode(read_data, (size_t)meminfo->count); > + } > + } else { > + meminfo->data = (char *)read_data; > + } > + > + return meminfo; > +} > + > 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 8d10a67..17f83b3 100644 > --- a/qmp-commands.hx > +++ b/qmp-commands.hx > @@ -499,6 +499,39 @@ Example: > EQMP > > { > + .name = "memchar-read", > + .args_type = "device:s,size:i,format:s?", > + .mhandler.cmd_new = qmp_marshal_input_memchar_read, > + }, > + > +SQMP > +memchar-read > +------------- > + > +Provide read interface for CirMemCharDriver. Read from the char > +device memory and return the data with size. > + > +Arguments: > + > +- "device": the name of the char device, must be unique (json-string) > +- "size": the memory size wanted to read in bytes (refer to unencoded > + size of the raw data), would adjust to the init size of the > + memchar if the requested size is larger than it. (json-int) > +- "format": the data format write to memchardev, default is > + utf8. (json-string, optional) > + - Possible values: "utf8", "base64" > + > +Example: > + > +-> { "execute": "memchar-read", > + "arguments": { "device": foo, > + "size": 1000, > + "format": "utf8" } } > +<- { "return": { "data": "data string...", "count": 1000 } } > + > +EQMP > + > + { > .name = "xen-save-devices-state", > .args_type = "filename:F", > .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
On 01/23/2013 11:42 PM, Luiz Capitulino wrote: > On Wed, 23 Jan 2013 17:06:12 +0800 > Lei Li <lilei@linux.vnet.ibm.com> wrote: > >> Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com> >> --- >> hmp-commands.hx | 21 +++++++++++++++++++++ >> hmp.c | 17 +++++++++++++++++ >> hmp.h | 1 + >> qapi-schema.json | 36 ++++++++++++++++++++++++++++++++++++ >> qemu-char.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ >> qmp-commands.hx | 33 +++++++++++++++++++++++++++++++++ >> 6 files changed, 156 insertions(+), 0 deletions(-) >> >> diff --git a/hmp-commands.hx b/hmp-commands.hx >> index bcfea11..bdd48f3 100644 >> --- a/hmp-commands.hx >> +++ b/hmp-commands.hx >> @@ -858,6 +858,27 @@ to char device 'memory'. >> ETEXI >> >> { >> + .name = "memchar_read", >> + .args_type = "device:s,size:i", >> + .params = "device size", >> + .help = "Provide read interface for CirMemCharDriver. Read from" >> + "it and return the data with size.", >> + .mhandler.cmd = hmp_memchar_read, >> + }, >> + >> +STEXI >> +@item memchar_read @var{device} >> +@findex memchar_read >> +Provide read interface for CirMemCharDriver. Read from char device >> +'memory' and return the data. >> + >> +@var{size} is the size of data want to read from. Refer to unencoded >> +size of the raw data, would adjust to the init size of the memchar >> +if the requested size is larger than it. >> + >> +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 647316a..1f1df5d 100644 >> --- a/hmp.c >> +++ b/hmp.c >> @@ -697,6 +697,23 @@ void hmp_memchar_write(Monitor *mon, const QDict *qdict) >> hmp_handle_error(mon, &errp); >> } >> >> +void hmp_memchar_read(Monitor *mon, const QDict *qdict) >> +{ >> + uint32_t size = qdict_get_int(qdict, "size"); >> + const char *chardev = qdict_get_str(qdict, "device"); >> + MemCharRead *meminfo; >> + Error *errp = NULL; >> + >> + meminfo = qmp_memchar_read(chardev, size, false, 0, &errp); >> + if (errp) { >> + monitor_printf(mon, "%s\n", error_get_pretty(errp)); >> + error_free(errp); >> + return; >> + } >> + >> + monitor_printf(mon, "%s, \n", meminfo->data); >> +} >> + >> static void hmp_cont_cb(void *opaque, int err) >> { >> if (!err) { >> diff --git a/hmp.h b/hmp.h >> index 06d6ea2..076d8cf 100644 >> --- a/hmp.h >> +++ b/hmp.h >> @@ -44,6 +44,7 @@ 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_memchar_read(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 8202311..ad4e276 100644 >> --- a/qapi-schema.json >> +++ b/qapi-schema.json >> @@ -363,6 +363,42 @@ >> '*format': 'DataFormat'} } >> >> ## >> +# @MemCharRead >> +# >> +# Result of QMP command memchar-read. >> +# >> +# @data: The data read from memchar as string. >> +# >> +# @count: The numbers of bytes read from. >> +# >> +# Since: 1.4 >> +## >> +{ 'type': 'MemCharRead', >> + 'data': { 'data': 'str', 'count': 'int' } } >> + >> +## >> +# @memchar-read: >> +# >> +# Provide read interface for memchardev. Read from the char >> +# device 'memory' and return the data. >> +# >> +# @device: the name of the memory char device. >> +# >> +# @size: the size to read in bytes. >> +# >> +# @format: #optional the format of the data want to read from >> +# memchardev, by default is 'utf8'. >> +# >> +# Returns: @MemCharRead >> +# If @device is not a valid memchr device, DeviceNotFound >> +# >> +# Since: 1.4 >> +## >> +{ 'command': 'memchar-read', >> + 'data': {'device': 'str', 'size': 'int', '*format': 'DataFormat'}, >> + 'returns': 'MemCharRead' } >> + >> +## >> # @CommandInfo: >> # >> # Information about a QMP command >> diff --git a/qemu-char.c b/qemu-char.c >> index dbd1a7c..c45397a 100644 >> --- a/qemu-char.c >> +++ b/qemu-char.c >> @@ -2790,6 +2790,54 @@ void qmp_memchar_write(const char *device, int64_t size, >> } >> } >> >> +MemCharRead *qmp_memchar_read(const char *device, int64_t size, >> + bool has_format, enum DataFormat format, >> + Error **errp) >> +{ >> + CharDriverState *chr; >> + guchar *read_data; >> + MemCharRead *meminfo; >> + size_t count; >> + >> + chr = qemu_chr_find(device); >> + if (!chr) { >> + error_set(errp, QERR_DEVICE_NOT_FOUND, device); >> + return NULL; >> + } >> + >> + if (qemu_is_chr(chr, "memory")) { >> + error_setg(errp,"%s is not memory char device", device); >> + return NULL; >> + } >> + >> + if (size <= 0) { >> + error_setg(errp, "size must be greater than zero"); >> + return NULL; >> + } >> + >> + /* Return empty strings when the buffer is empty. */ >> + if (cirmem_chr_is_empty(chr)) { >> + return NULL; >> + } > You can't just return NULL here, if you have to return MemCharRead. It's > not a problem to have an empty data and 0 size. ok, thanks. >> + >> + count = qemu_chr_cirmem_count(chr); >> + size = size > count ? count : size; >> + read_data = g_malloc0(size + 1); >> + >> + meminfo = g_malloc0(sizeof(MemCharRead)); >> + meminfo->count = cirmem_chr_read(chr, read_data, size); >> + >> + if (has_format && (format == DATA_FORMAT_BASE64)) { >> + if (read_data) { >> + meminfo->data = g_base64_encode(read_data, (size_t)meminfo->count); >> + } >> + } else { >> + meminfo->data = (char *)read_data; >> + } >> + >> + return meminfo; >> +} >> + >> 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 8d10a67..17f83b3 100644 >> --- a/qmp-commands.hx >> +++ b/qmp-commands.hx >> @@ -499,6 +499,39 @@ Example: >> EQMP >> >> { >> + .name = "memchar-read", >> + .args_type = "device:s,size:i,format:s?", >> + .mhandler.cmd_new = qmp_marshal_input_memchar_read, >> + }, >> + >> +SQMP >> +memchar-read >> +------------- >> + >> +Provide read interface for CirMemCharDriver. Read from the char >> +device memory and return the data with size. >> + >> +Arguments: >> + >> +- "device": the name of the char device, must be unique (json-string) >> +- "size": the memory size wanted to read in bytes (refer to unencoded >> + size of the raw data), would adjust to the init size of the >> + memchar if the requested size is larger than it. (json-int) >> +- "format": the data format write to memchardev, default is >> + utf8. (json-string, optional) >> + - Possible values: "utf8", "base64" >> + >> +Example: >> + >> +-> { "execute": "memchar-read", >> + "arguments": { "device": foo, >> + "size": 1000, >> + "format": "utf8" } } >> +<- { "return": { "data": "data string...", "count": 1000 } } >> + >> +EQMP >> + >> + { >> .name = "xen-save-devices-state", >> .args_type = "filename:F", >> .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state, >
diff --git a/hmp-commands.hx b/hmp-commands.hx index bcfea11..bdd48f3 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -858,6 +858,27 @@ to char device 'memory'. ETEXI { + .name = "memchar_read", + .args_type = "device:s,size:i", + .params = "device size", + .help = "Provide read interface for CirMemCharDriver. Read from" + "it and return the data with size.", + .mhandler.cmd = hmp_memchar_read, + }, + +STEXI +@item memchar_read @var{device} +@findex memchar_read +Provide read interface for CirMemCharDriver. Read from char device +'memory' and return the data. + +@var{size} is the size of data want to read from. Refer to unencoded +size of the raw data, would adjust to the init size of the memchar +if the requested size is larger than it. + +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 647316a..1f1df5d 100644 --- a/hmp.c +++ b/hmp.c @@ -697,6 +697,23 @@ void hmp_memchar_write(Monitor *mon, const QDict *qdict) hmp_handle_error(mon, &errp); } +void hmp_memchar_read(Monitor *mon, const QDict *qdict) +{ + uint32_t size = qdict_get_int(qdict, "size"); + const char *chardev = qdict_get_str(qdict, "device"); + MemCharRead *meminfo; + Error *errp = NULL; + + meminfo = qmp_memchar_read(chardev, size, false, 0, &errp); + if (errp) { + monitor_printf(mon, "%s\n", error_get_pretty(errp)); + error_free(errp); + return; + } + + monitor_printf(mon, "%s, \n", meminfo->data); +} + static void hmp_cont_cb(void *opaque, int err) { if (!err) { diff --git a/hmp.h b/hmp.h index 06d6ea2..076d8cf 100644 --- a/hmp.h +++ b/hmp.h @@ -44,6 +44,7 @@ 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_memchar_read(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 8202311..ad4e276 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -363,6 +363,42 @@ '*format': 'DataFormat'} } ## +# @MemCharRead +# +# Result of QMP command memchar-read. +# +# @data: The data read from memchar as string. +# +# @count: The numbers of bytes read from. +# +# Since: 1.4 +## +{ 'type': 'MemCharRead', + 'data': { 'data': 'str', 'count': 'int' } } + +## +# @memchar-read: +# +# Provide read interface for memchardev. Read from the char +# device 'memory' and return the data. +# +# @device: the name of the memory char device. +# +# @size: the size to read in bytes. +# +# @format: #optional the format of the data want to read from +# memchardev, by default is 'utf8'. +# +# Returns: @MemCharRead +# If @device is not a valid memchr device, DeviceNotFound +# +# Since: 1.4 +## +{ 'command': 'memchar-read', + 'data': {'device': 'str', 'size': 'int', '*format': 'DataFormat'}, + 'returns': 'MemCharRead' } + +## # @CommandInfo: # # Information about a QMP command diff --git a/qemu-char.c b/qemu-char.c index dbd1a7c..c45397a 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -2790,6 +2790,54 @@ void qmp_memchar_write(const char *device, int64_t size, } } +MemCharRead *qmp_memchar_read(const char *device, int64_t size, + bool has_format, enum DataFormat format, + Error **errp) +{ + CharDriverState *chr; + guchar *read_data; + MemCharRead *meminfo; + size_t count; + + chr = qemu_chr_find(device); + if (!chr) { + error_set(errp, QERR_DEVICE_NOT_FOUND, device); + return NULL; + } + + if (qemu_is_chr(chr, "memory")) { + error_setg(errp,"%s is not memory char device", device); + return NULL; + } + + if (size <= 0) { + error_setg(errp, "size must be greater than zero"); + return NULL; + } + + /* Return empty strings when the buffer is empty. */ + if (cirmem_chr_is_empty(chr)) { + return NULL; + } + + count = qemu_chr_cirmem_count(chr); + size = size > count ? count : size; + read_data = g_malloc0(size + 1); + + meminfo = g_malloc0(sizeof(MemCharRead)); + meminfo->count = cirmem_chr_read(chr, read_data, size); + + if (has_format && (format == DATA_FORMAT_BASE64)) { + if (read_data) { + meminfo->data = g_base64_encode(read_data, (size_t)meminfo->count); + } + } else { + meminfo->data = (char *)read_data; + } + + return meminfo; +} + 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 8d10a67..17f83b3 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -499,6 +499,39 @@ Example: EQMP { + .name = "memchar-read", + .args_type = "device:s,size:i,format:s?", + .mhandler.cmd_new = qmp_marshal_input_memchar_read, + }, + +SQMP +memchar-read +------------- + +Provide read interface for CirMemCharDriver. Read from the char +device memory and return the data with size. + +Arguments: + +- "device": the name of the char device, must be unique (json-string) +- "size": the memory size wanted to read in bytes (refer to unencoded + size of the raw data), would adjust to the init size of the + memchar if the requested size is larger than it. (json-int) +- "format": the data format write to memchardev, default is + utf8. (json-string, optional) + - Possible values: "utf8", "base64" + +Example: + +-> { "execute": "memchar-read", + "arguments": { "device": foo, + "size": 1000, + "format": "utf8" } } +<- { "return": { "data": "data string...", "count": 1000 } } + +EQMP + + { .name = "xen-save-devices-state", .args_type = "filename:F", .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com> --- hmp-commands.hx | 21 +++++++++++++++++++++ hmp.c | 17 +++++++++++++++++ hmp.h | 1 + qapi-schema.json | 36 ++++++++++++++++++++++++++++++++++++ qemu-char.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ qmp-commands.hx | 33 +++++++++++++++++++++++++++++++++ 6 files changed, 156 insertions(+), 0 deletions(-)