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Re: [Qemu-devel] [PATCH] usb-mtp: added support for files larger than 4g
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From: |
Bandan Das |
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Subject: |
Re: [Qemu-devel] [PATCH] usb-mtp: added support for files larger than 4gb |
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Date: |
Thu, 14 Jul 2016 14:46:29 -0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Hi Isaac,
Isaac Lozano <address@hidden> writes:
> Added support for sending data larger than 4gb. Also implemented
> object properties so that Windows can receive >4gb files.
Good work! :) Also, please consider making the
commit message a little more verbose. Please split up the patches
as Gerd suggested.
Some comments below regarding unsupported object properties.
> Signed-off-by: Isaac Lozano <address@hidden>
> ---
> hw/usb/dev-mtp.c | 196
> +++++++++++++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 191 insertions(+), 5 deletions(-)
>
> diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c
> index 1be85ae..f9259d7 100644
> --- a/hw/usb/dev-mtp.c
> +++ b/hw/usb/dev-mtp.c
> @@ -48,6 +48,9 @@ enum mtp_code {
> CMD_GET_OBJECT_INFO = 0x1008,
> CMD_GET_OBJECT = 0x1009,
> CMD_GET_PARTIAL_OBJECT = 0x101b,
> + CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
> + CMD_GET_OBJECT_PROP_DESC = 0x9802,
> + CMD_GET_OBJECT_PROP_VALUE = 0x9803,
>
> /* response codes */
> RES_OK = 0x2001,
> @@ -59,6 +62,7 @@ enum mtp_code {
> RES_INCOMPLETE_TRANSFER = 0x2007,
> RES_INVALID_STORAGE_ID = 0x2008,
> RES_INVALID_OBJECT_HANDLE = 0x2009,
> + RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
> RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
> RES_INVALID_PARENT_OBJECT = 0x201a,
> RES_INVALID_PARAMETER = 0x201d,
> @@ -72,6 +76,22 @@ enum mtp_code {
> EVT_OBJ_ADDED = 0x4002,
> EVT_OBJ_REMOVED = 0x4003,
> EVT_OBJ_INFO_CHANGED = 0x4007,
> +
> + /* object properties */
> + PROP_STORAGE_ID = 0xDC01,
> + PROP_OBJECT_FORMAT = 0xDC02,
> + PROP_OBJECT_COMPRESSED_SIZE = 0xDC04,
> + PROP_PARENT_OBJECT = 0xDC0B,
Is prop_parent_object required to be supported ? What does it exactly
do ?
> + PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41,
> + PROP_NAME = 0xDC44,
> +};
> +
What about the case when initiator requests a property
not implemented ? Reponder should be returning back a specific error
code right ?
Bandan
> +enum mtp_data_type {
> + DATA_TYPE_UINT16 = 0x0004,
> + DATA_TYPE_UINT32 = 0x0006,
> + DATA_TYPE_UINT64 = 0x0008,
> + DATA_TYPE_UINT128 = 0x000a,
> + DATA_TYPE_STRING = 0xffff,
> };
>
> typedef struct {
> @@ -115,8 +135,8 @@ struct MTPControl {
> struct MTPData {
> uint16_t code;
> uint32_t trans;
> - uint32_t offset;
> - uint32_t length;
> + uint64_t offset;
> + uint64_t length;
> uint32_t alloc;
> uint8_t *data;
> bool first;
> @@ -778,6 +798,9 @@ static MTPData *usb_mtp_get_device_info(MTPState *s,
> MTPControl *c)
> CMD_GET_OBJECT_INFO,
> CMD_GET_OBJECT,
> CMD_GET_PARTIAL_OBJECT,
> + CMD_GET_OBJECT_PROPS_SUPPORTED,
> + CMD_GET_OBJECT_PROP_DESC,
> + CMD_GET_OBJECT_PROP_VALUE,
> };
> static const uint16_t fmt[] = {
> FMT_UNDEFINED_OBJECT,
> @@ -883,7 +906,12 @@ static MTPData *usb_mtp_get_object_info(MTPState *s,
> MTPControl *c,
> usb_mtp_add_u32(d, QEMU_STORAGE_ID);
> usb_mtp_add_u16(d, o->format);
> usb_mtp_add_u16(d, 0);
> - usb_mtp_add_u32(d, o->stat.st_size);
> +
> + if (o->stat.st_size > 0xFFFFFFFF) {
> + usb_mtp_add_u32(d, 0xFFFFFFFF);
> + } else {
> + usb_mtp_add_u32(d, o->stat.st_size);
> + }
>
> usb_mtp_add_u16(d, 0);
> usb_mtp_add_u32(d, 0);
> @@ -966,6 +994,122 @@ static MTPData *usb_mtp_get_partial_object(MTPState *s,
> MTPControl *c,
> return d;
> }
>
> +static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl
> *c)
> +{
> + static const uint16_t props[] = {
> + PROP_STORAGE_ID,
> + PROP_OBJECT_FORMAT,
> + PROP_OBJECT_COMPRESSED_SIZE,
> + PROP_PARENT_OBJECT,
> + PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER,
> + PROP_NAME,
> + };
> + MTPData *d = usb_mtp_data_alloc(c);
> + usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props);
> +
> + return d;
> +}
> +
> +static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c)
> +{
> + MTPData *d = usb_mtp_data_alloc(c);
> + switch (c->argv[0]) {
> + case PROP_STORAGE_ID:
> + usb_mtp_add_u16(d, PROP_STORAGE_ID);
> + usb_mtp_add_u16(d, DATA_TYPE_UINT32);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u8(d, 0x00);
> + break;
> + case PROP_OBJECT_FORMAT:
> + usb_mtp_add_u16(d, PROP_OBJECT_FORMAT);
> + usb_mtp_add_u16(d, DATA_TYPE_UINT16);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u16(d, 0x0000);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u8(d, 0x00);
> + break;
> + case PROP_OBJECT_COMPRESSED_SIZE:
> + usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE);
> + usb_mtp_add_u16(d, DATA_TYPE_UINT64);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u64(d, 0x0000000000000000);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u8(d, 0x00);
> + break;
> + case PROP_PARENT_OBJECT:
> + usb_mtp_add_u16(d, PROP_PARENT_OBJECT);
> + usb_mtp_add_u16(d, DATA_TYPE_UINT32);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u8(d, 0x00);
> + break;
> + case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
> + usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER);
> + usb_mtp_add_u16(d, DATA_TYPE_UINT128);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u64(d, 0x0000000000000000);
> + usb_mtp_add_u64(d, 0x0000000000000000);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u8(d, 0x00);
> + break;
> + case PROP_NAME:
> + usb_mtp_add_u16(d, PROP_NAME);
> + usb_mtp_add_u16(d, DATA_TYPE_STRING);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u8(d, 0x00);
> + usb_mtp_add_u32(d, 0x00000000);
> + usb_mtp_add_u8(d, 0x00);
> + break;
> + default:
> + usb_mtp_data_free(d);
> + return NULL;
> + }
> +
> + return d;
> +}
> +
> +static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c,
> + MTPObject *o)
> +{
> + MTPData *d = usb_mtp_data_alloc(c);
> + switch (c->argv[1]) {
> + case PROP_STORAGE_ID:
> + usb_mtp_add_u32(d, QEMU_STORAGE_ID);
> + break;
> + case PROP_OBJECT_FORMAT:
> + usb_mtp_add_u16(d, o->format);
> + break;
> + case PROP_OBJECT_COMPRESSED_SIZE:
> + usb_mtp_add_u64(d, o->stat.st_size);
> + break;
> + case PROP_PARENT_OBJECT:
> + if (o->parent == NULL) {
> + usb_mtp_add_u32(d, 0x00000000);
> + } else {
> + usb_mtp_add_u32(d, o->parent->handle);
> + }
> + break;
> + case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
> + /* Should be persistant between sessions,
> + * but using our objedt ID is "good enough"
> + * for now */
> + usb_mtp_add_u64(d, 0x0000000000000000);
> + usb_mtp_add_u64(d, o->handle);
> + break;
> + case PROP_NAME:
> + usb_mtp_add_str(d, o->name);
> + break;
> + default:
> + usb_mtp_data_free(d);
> + return NULL;
> + }
> +
> + return d;
> +}
> +
> static void usb_mtp_command(MTPState *s, MTPControl *c)
> {
> MTPData *data_in = NULL;
> @@ -1113,6 +1257,43 @@ static void usb_mtp_command(MTPState *s, MTPControl *c)
> nres = 1;
> res0 = data_in->length;
> break;
> + case CMD_GET_OBJECT_PROPS_SUPPORTED:
> + if (c->argv[0] != FMT_UNDEFINED_OBJECT &&
> + c->argv[0] != FMT_ASSOCIATION) {
> + usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
> + c->trans, 0, 0, 0);
> + return;
> + }
> + data_in = usb_mtp_get_object_props_supported(s, c);
> + break;
> + case CMD_GET_OBJECT_PROP_DESC:
> + if (c->argv[1] != FMT_UNDEFINED_OBJECT &&
> + c->argv[1] != FMT_ASSOCIATION) {
> + usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
> + c->trans, 0, 0, 0);
> + return;
> + }
> + data_in = usb_mtp_get_object_prop_desc(s, c);
> + if (data_in == NULL) {
> + usb_mtp_queue_result(s, RES_GENERAL_ERROR,
> + c->trans, 0, 0, 0);
> + return;
> + }
> + break;
> + case CMD_GET_OBJECT_PROP_VALUE:
> + o = usb_mtp_object_lookup(s, c->argv[0]);
> + if (o == NULL) {
> + usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
> + c->trans, 0, 0, 0);
> + return;
> + }
> + data_in = usb_mtp_get_object_prop_value(s, c, o);
> + if (data_in == NULL) {
> + usb_mtp_queue_result(s, RES_GENERAL_ERROR,
> + c->trans, 0, 0, 0);
> + return;
> + }
> + break;
> default:
> trace_usb_mtp_op_unknown(s->dev.addr, c->code);
> usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
> @@ -1193,10 +1374,15 @@ static void usb_mtp_handle_data(USBDevice *dev,
> USBPacket *p)
> }
> if (s->data_in != NULL) {
> MTPData *d = s->data_in;
> - int dlen = d->length - d->offset;
> + uint64_t dlen = d->length - d->offset;
> if (d->first) {
> trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
> - container.length = cpu_to_le32(d->length +
> sizeof(container));
> + if (d->length + sizeof(container) > 0xFFFFFFFF) {
> + container.length = cpu_to_le32(0xFFFFFFFF);
> + } else {
> + container.length = cpu_to_le32(d->length +
> + sizeof(container));
> + }
> container.type = cpu_to_le16(TYPE_DATA);
> container.code = cpu_to_le16(d->code);
> container.trans = cpu_to_le32(d->trans);