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Implement getfreemem in sevenfs

This commit is contained in:
Lailouezzz 2020-01-05 17:04:44 +01:00
parent fee76e5431
commit fa3108c6c6
Signed by: Lailouezzz
GPG Key ID: 03FCE8A99EF8482C
1 changed files with 50 additions and 0 deletions
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50
lib/link/seven_fs/getfreemem.c
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@ -34,6 +34,56 @@ int CASIO_EXPORT casio_sevenfs_getfreemem(sevenfs_cookie_t *cookie,
{
int err;
casio_link_t *handle = cookie;
const char *devname = (path->sevenfs_path_dev != 0xFF) ?
&path->sevenfs_path_data[path->sevenfs_path_dev] :
NULL;
/* Some checks */
chk_handle(handle);
chk_active(handle);
if (devname == NULL)
return (casio_error_op);
/* Send command packet */
if ((err = casio_seven_send_cmdfls_reqcapacity(handle, devname))) {
msg((ll_fatal, "Couldn't send request/didn't receive answer"));
return (casio_error_unknown);
}
/* Check response packet */
if (response.casio_seven_packet_type == casio_seven_type_nak
&& response.casio_seven_packet_code == casio_seven_err_other) {
msg((ll_fatal, "File system probably doesn't exist"));
return (casio_error_device);
} else if (response.casio_seven_packet_type != casio_seven_type_ack) {
msg((ll_fatal, "Didn't receive ack ro known error..."));
return (casio_error_unknown);
}
/* Swap roles */
msg((ll_info, "Sending roleswap"));
if ((err = casio_seven_send_roleswp(handle))) {
msg((ll_fatal, "Couldn't swap roles"));
return (err);
} else if (response.casio_seven_packet_type != casio_seven_type_cmd
|| response.casio_seven_packet_code != 0x4C
|| !response.casio_seven_packet_args[4]) {
msg((ll_fatal, "Didn't receive expected comand"));
return (casio_error_unknown);
}
/* Decode thingy */
*capacity = response.casio_seven_packet_filesize;
/* ack and check for the roleswap */
msg((ll_info, "Return ack and wait for roleswp"));
if ((err = casio_seven_send_ack(handle, 1))) {
msg((ll_fatal, "Unable to send ack"));
return (err);
} else if (response.casio_seven_packet_type != casio_seven_type_swp) {
return (casio_error_unknown);
}
/* No error */
return (0);
}