std::string basic_warning::what() const {
if (is_active()) {
return prepare_msg();
} else {
return std::string();
}
}
basic_exception::basic_exception(const basic_exception& e) :
std::runtime_error((std::runtime_error) e), my_cause(0) {
if (e.my_cause) {
my_cause = new basic_exception(*e.my_cause);
}
prepare_msg();
}
void private_msg(t_list **list, int cs1, char *nick, char *str)
{
t_list *tmp;
char *name;
char *msg;
char result[4096];
int i;
i = 0;
tmp = *list;
while (str[i] != ' ')
i++;
name = strndup(str, i);
msg = strdup(str + i + 1);
while (strcmp(tmp->nick, name) != 0 && tmp->next != NULL)
tmp= tmp->next;
if (strcmp(tmp->nick, name) == 0)
{
sprintf(result, "To %s: %s", name, msg);
write(cs1, result, strlen(result));
prepare_msg(nick, msg, tmp->value, list);
}
else
write(cs1, "This users doesn't exist\n", 25);
}
void* listenClient(void* ptr)
{
int soc;
struct msghdr *msg;
char * data = (char *) malloc(MAX_BUF_SZ);
prepare_msg(0, &msg, data, MAX_BUF_SZ);
#ifdef DEBUG
printf("this thread listens connection requests from clients\n");
#endif
while(1){
soc = acceptConnection(client_listen_socket);
if (soc == -1 ) {
printf("Accept failed");
exit(0);
}
#ifdef DEBUG
printf("connected to client\n");
#endif
if (thr_id == MAX_THR) {
thr_id = 0;
}
if((pthread_create(&threads[thr_id++], NULL, handle_client_request, (void*)soc)) != 0) {
printf("%s: Failed to create thread to handle client requests %d\n", __func__, thr_id);
}
}
}
static void catch_in_unit_test(print_fn_t fn, const loc_t *loc,
const char *fmt, va_list ap)
{
if (opt_get_int("unit-test")) {
char *strp LOCAL = prepare_msg(fmt, ap, error_force_plain);
error_fn(strp, loc != NULL ? loc : &LOC_INVALID);
}
basic_exception& basic_exception::operator=(const basic_exception& e) {
std::runtime_error::operator=(e);
if (e.my_cause) {
my_cause = new basic_exception(*e.my_cause);
}
prepare_msg();
return *this;
}
static void msg_at(print_fn_t fn, const loc_t *loc, const char *fmt, va_list ap)
{
char *strp = prepare_msg(fmt, ap, false);
if (message_style == MESSAGE_COMPACT)
fmt_loc(stderr, loc);
(*fn)("%s", strp);
if (message_style == MESSAGE_FULL)
fmt_loc(stderr, loc);
free(strp);
}
void error_at(const loc_t *loc, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
char *strp LOCAL = prepare_msg(fmt, ap, error_force_plain);
error_fn(strp, loc != NULL ? loc : &LOC_INVALID);
va_end(ap);
}
basic_exception::basic_exception(const std::string& msg,
const std::exception& cause) :
std::runtime_error(msg) {
if (const basic_exception* b = dynamic_cast<const basic_exception*>(&cause)) {
my_cause = new basic_exception(*b);
} else {
my_cause = new basic_exception(cause.what());
}
prepare_msg();
}
static int color_vfprintf(FILE *f, const char *fmt, va_list ap)
{
char *strp LOCAL = prepare_msg(fmt, ap, false);
bool escape = false;
int len = 0;
for (const char *p = strp; *p != '\0'; p++) {
if (*p == '\033')
escape = true;
if (escape)
escape = (*p != 'm');
else
len += 1;
}
fputs(strp, f);
return len;
}
static int gfs_create(const char *path, mode_t mode, struct fuse_file_info *fi)
{
struct msghdr *msg;
int master_soc;
int ret;
open_req data_ptr;
create_open_req(&data_ptr,path,fi->flags | O_CREAT);
prepare_msg(OPEN_REQ, &msg, &data_ptr, sizeof(open_req));
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server\n",__func__);
return -1;
}
#ifdef DEBUG
print_msg(msg->msg_iov[0].iov_base);
printf("flags are ------ %d\n", ((open_req*)msg->msg_iov[1].iov_base)->flags);
#endif
/* send a message to master */
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
return -1;
}
/* reply from master */
if((recvmsg(master_soc,msg,0))==-1){
printf("%s: message receipt failed\n",__func__);
return -1;
}
close(master_soc);
/* if failure return -errno */
dfs_msg *dfsmsg = msg->msg_iov[0].iov_base;
if(dfsmsg->status!=0){
return dfsmsg->status;
}
return 0;
}
static int gfs_mkdir(const char *path, mode_t mode)
{
struct msghdr *msg;
int master_soc;
int ret;
mkdir_req data_ptr;
create_mkdir_req(&data_ptr,path,mode);
prepare_msg(MAKE_DIR_REQ, &msg, &data_ptr, sizeof(mkdir_req));
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server\n",__func__);
return -1;
}
print_msg(msg->msg_iov[0].iov_base);
/* send a message to master */
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
return -1;
}
/* reply from master */
if((recvmsg(master_soc,msg,0))==-1){
printf("%s: message receipt failed\n",__func__);
return -1;
}
close(master_soc);
/* if failure return -errno */
dfs_msg *dfsmsg = msg->msg_iov[0].iov_base;
if(dfsmsg->status != 0){
return dfsmsg->status;
}
return 0;
}
int color_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
char *strp LOCAL = prepare_msg(fmt, ap, false);
va_end(ap);
bool escape = false;
int len = 0;
for (const char *p = strp; *p != '\0'; p++) {
if (*p == '\033')
escape = true;
if (escape)
escape = (*p != 'm');
else
len += 1;
}
printf("%s", strp);
return len;
}
basic_exception::basic_exception(const std::string& msg) :
std::runtime_error(msg), my_cause(0) {
prepare_msg();
}
/* draw the the AR objects */
static int draw(ObjectData_T *object, int objectnum)
{
int i;
double gl_para[16];
glClearDepth(1.0);
glClear(GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glEnable(GL_LIGHTING);
/* calculate the viewing parameters - gl_para */
int count = 0;
float x1, x2,x3;
float y1, y2,y3;
float z1, z2,z3;
for (i = 0; i < objectnum; i++) {
if (object[i].visible == 0)continue;
count++;
argConvGlpara(object[i].trans, gl_para);
draw_object(object[i].id, gl_para);
}
x1 = object[0].trans[0][3], x2 = object[1].trans[0][3],x3 = object[2].trans[0][3];
y1 = object[0].trans[1][3], y2 = object[1].trans[1][3], y3 = object[2].trans[1][3];
z1 = object[0].trans[2][3], z2 = object[1].trans[2][3], z3 = object[2].trans[2][3];
int grid = object[0].visible && object[1].visible;
if (grid == 1){
distX = fabs(x2 - x1);
distY = fabs(y2 - y1);
distZ = fabs(z2 - z1);
//printf("grid distance %f %f %f \n ", distX, distY, distZ);
}
int controler = object[2].visible;
if (object[0].visible && controler){
distX1 = fabs(x3 - x1);
distY1 = fabs(y3 - y1);
distX0 = fabs(x3 - x2);
distY0 = fabs(y3 - y2);
}
if (nFrame++ == 50) {
nFrame = 0;
if (controler){
//calculate distance
//printf("object id = %d || x = %f || y = %f || z = %f ||\n", object[0].id, x1, y1, z1);
//printf("object id = %d || x = %f || y = %f || z = %f ||\n", object[1].id, x2, y2, z2);
//printf("object id = %d || x = %f || y = %f || z = %f ||\n", object[2].id, x3, y3, z3);
printf(" distancia 0 - - 1 x = %f || y = %f || z = %f ||\n", distX, distY, distZ);
printf(" distancia 0-2 0-1 || x = %f - - %f || y = %f - - %f ||\n", distX1,distX0 , distY1, distY0);
double x_send = distX1 / distX;
double y_send = distY1 / distY;
printf(" distancia norma x = %f || y = %f \n", x_send, y_send);
/*
// treat overflow
if (x_send < 0.0)
x_send = 0.0;
else{
if (y_send < 0.0)
y_send = 0.0;
else{
if (x_send > 1.0)
x_send = 1.0;
else{
if (y_send > 1.0)
y_send = 1.0;
}
}
}
*/
//printf(" distancia normalizada x = %f || y = %f ||\n", x_send, y_send);
prepare_msg(x_send, y_send);
udpSend(buf2);
// if relevante change in distance then udpSend
}
}
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
return(0);
}
static int gfs_write(const char *path, const char *buf, size_t size,off_t offset, struct fuse_file_info *fi)
{
#ifdef DEBUG
printf("Inside Write\n");
#endif
struct msghdr *msg;
int master_soc;
int ret;
int i;
int chunk_soc;
char write_ptr[SMALL_BUF];
char *resp = (char*)malloc(SMALL_BUF*sizeof(char));
host chunk_server[2];
char chunk_handle[64];
size_t write_size = 0;
int start_block = offset/CHUNK_SIZE;
int last_block = (offset+size-1)/CHUNK_SIZE;
int chunk_size, chunk_offset;
for(i=start_block;i<=last_block;i++){
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server\n",__func__);
return -1;
}
/* Send metadat request to master */
if ( i == start_block) {
chunk_offset = offset % CHUNK_SIZE;
} else {
chunk_offset = 0;
}
if ((size - write_size + chunk_offset) > CHUNK_SIZE) {
chunk_size = CHUNK_SIZE - chunk_offset;
} else {
chunk_size = size - write_size;
}
create_write_req(write_ptr, path, i, chunk_offset, chunk_size);
prepare_msg(WRITE_REQ, &msg, write_ptr, SMALL_BUF);
// print_msg(msg->msg_iov[0].iov_base);
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
return -1;
}
/* Matadata reply from master */
if((recvmsg(master_soc,msg,0))==-1){
printf("%s: message receipt failed\n",__func__);
return -1;
}
close(master_soc);
/* Extract primary and secondary chunkserver details */
dfs_msg *dfsmsg = msg->msg_iov[0].iov_base;
if (dfsmsg->status != 0) {
printf("%s: Error creating chunk on master\n",__func__);
return -1;
}
printf("before response\n");
strcpy(resp,msg->msg_iov[1].iov_base);
#ifdef DEBUG
printf("response is %s\n",resp);
#endif
strcpy(chunk_server[0].ip_addr,strtok(resp,":"));
chunk_server[0].port = atoi(strtok(NULL,":"));
strcpy(chunk_server[1].ip_addr,strtok(NULL,":"));
chunk_server[1].port = atoi(strtok(NULL,":"));
strcpy(chunk_handle, strtok(NULL,":"));
#ifdef DEBUG
printf("Write response - primary-%s:%d secondary-%s:%d chunkhandle-%s\n",
chunk_server[0].ip_addr, chunk_server[0].port, chunk_server[1].ip_addr, chunk_server[1].port, chunk_handle);
#endif
/* Create connection with secondary chunkserver */
if((chunk_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(chunk_server[1],chunk_soc) == -1){
printf("%s: can not connect to the chunk server\n",__func__);
return -1;
}
/* Prepare write data request */
//write_data_req *data_ptr = (write_data_req*) malloc (sizeof(write_data_req));
char *data_ptr = (char*)malloc(sizeof(char)*MAX_BUF_SZ);
create_write_data_req(data_ptr, chunk_handle, buf+ write_size, chunk_offset, chunk_size);
#ifdef DEBUG
int j;
printf("Data to be written is - \n");
for (j = 0; j < strlen(data_ptr); j++)
printf("%c", data_ptr[j]);
// printf("\nhandle - %s\n", data_ptr->chunk+CHUNK_SIZE);
printf("\n");
#endif
free_msg(msg);
prepare_msg(WRITE_DATA_REQ, &msg, data_ptr, strlen(data_ptr)+1);
print_msg(msg->msg_iov[0].iov_base);
/* Send write-data request to secondary chunkserver */
if((sendmsg(chunk_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
} else {
printf("%s: Sent write request to secondary chunkserver\n",__func__);
}
/* Reply from secondary chunkserver */
if((recvmsg(chunk_soc,msg,0))==-1){
printf("%s: message receipt failed\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
} else {
printf("%s: Received write reply from secondary chunkserver\n",__func__);
}
close(chunk_soc);
/* If secondary chunkserver failed to write data - report failure to client */
dfsmsg = msg->msg_iov[0].iov_base;
if (dfsmsg->status != 0) {
printf("%s: Error writing data to secondary chunserver\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
}
/* create connection with primary chunk server */
if((chunk_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
}
if(createConnection(chunk_server[0],chunk_soc) == -1){
printf("%s: can not connect to the chunk server\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
}
/* Send write-data to primary chunkserver */
create_write_data_req(data_ptr, chunk_handle, buf+ write_size, chunk_offset, chunk_size);
free_msg(msg);
prepare_msg(WRITE_DATA_REQ, &msg, data_ptr, strlen(data_ptr)+1);
if((sendmsg(chunk_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
} else {
printf("%s: Sent write request to primary chunkserver\n",__func__);
}
/* Reply from primary chunkserver */
if((recvmsg(chunk_soc,msg,0))==-1) {
printf("%s: message receipt failed\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
} else {
printf("%s: Received write reply from primary chunkserver\n",__func__);
}
close(chunk_soc);
/* If Primary chunkserver failed to write data - report failure to client and secondary chunkserver */
dfsmsg = msg->msg_iov[0].iov_base;
if (dfsmsg->status != 0) {
printf("%s: Error writing data to primary chunserver\n",__func__);
free_msg(msg);
/* TODO : send rollback to secondary chunkserver */
if((chunk_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(chunk_server[1],chunk_soc) == -1){
printf("%s: can not connect to the chunk server\n",__func__);
return -1;
}
prepare_msg(ROLLBACK_REQ, &msg, data_ptr, sizeof(write_data_req));
if((sendmsg(chunk_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
} else {
printf("%s: Sent write request to secondary chunkserver\n",__func__);
}
/* Reply from secondary chunkserver */
if((recvmsg(chunk_soc,msg,0))==-1) {
printf("%s: message receipt failed\n",__func__);
free_msg(msg);
free(data_ptr);
return -1;
} else {
printf("%s: Received write reply from secondary chunkserver\n",__func__);
}
free(data_ptr);
close(chunk_soc);
return -1;
}
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server\n",__func__);
return -1;
}
create_write_req(write_ptr, path, i, chunk_offset, chunk_size);
prepare_msg(WRITE_COMMIT_REQ, &msg, write_ptr, strlen(write_ptr));
print_msg(msg->msg_iov[0].iov_base);
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
return -1;
}
/* Matadata reply from master */
if((recvmsg(master_soc,msg,0))==-1){
printf("%s: message receipt failed\n",__func__);
return -1;
}
close(master_soc);
dfsmsg = msg->msg_iov[0].iov_base;
if (dfsmsg->status != 0) {
printf("%s: Error commiting write on master\n",__func__);
return -1;
}
write_size += chunk_size;
free_msg(msg);
free(data_ptr);
}
/* Return number of bytes written */
#ifdef DEBUG
printf("No. of bytes written successfully - %d\n", write_size);
#endif
return write_size;
}
//#define DEBUG
static int gfs_getattr(const char *path, struct stat *stbuf)
{
struct msghdr *msg;
int master_soc;
int ret;
char * buf = (char*) malloc (1000);
strcpy(buf, path);
prepare_msg(GETATTR_REQ, &msg, buf, 1000);
print_msg(msg->msg_iov[0].iov_base);
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
free(buf);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server - error-%d\n",__func__, errno);
free(buf);
return -1;
}
/* send a message to master */
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed - %d\n",__func__, errno);
free(buf);
return -1;
} else {
#ifdef DEBUG
printf("%s: Getattr request sent\n",__func__);
#endif
}
free(msg);
prepare_msg(GETATTR_REQ, &msg, buf, 1000);
/* reply from master */
if((recvmsg(master_soc,msg,0))==-1){
printf("%s: message receipt failed - %d\n",__func__, errno);
free(buf);
return -1;
} else {
#ifdef DEBUG
printf("%s: Getattr response received from server\n",__func__);
#endif
}
close(master_soc);
/* if failure return -errno */
dfs_msg *dfsmsg = msg->msg_iov[0].iov_base;
if(dfsmsg->status != 0){
#ifdef DEBUG
printf("%s: Getattr status is - %d\n",__func__, dfsmsg->status);
#endif
free(buf);
return dfsmsg->status;
}
/* TODO : Only size and inode nummer is received from master right now */
char *str = msg->msg_iov[1].iov_base;
#ifdef DEBUG
printf("%s: Getattr str - %s\n",__func__, str);
#endif
char ino[10], size[10];
int i = 0, j = 0;
while (str[i] != ' ') {
ino[j++] = str[i++];
}
ino[j] = '\0';
i++;
j = 0;
while (str[i] != ' ') {
size[j++] = str[i++];
}
size[j] = '\0';
lstat("./client.c", stbuf);
stbuf->st_ino = atol(ino);
stbuf->st_size = atol(size);
#ifdef DEBUG
printf("%s: Getattr status is - %d ino = %llu file size = %llu\n",__func__
, dfsmsg->status, stbuf->st_ino, stbuf->st_size);
#endif
free(buf);
return 0;
}
static int gfs_read(const char *path, char *buf, size_t size, off_t offset,struct fuse_file_info *fi)
{
#ifdef DEBUG
printf("Inside Read\n");
#endif
struct msghdr *msg;
int master_soc;
int chunk_soc;
host chunk_server;
int ret;
int i;
int curr_offset;
char read_ptr[SMALL_BUF];
char *data_ptr = (char*)malloc(sizeof(char)*SMALL_BUF);
char chunk_handle[64];
dfs_msg *dfsmsg;
size_t size_read = 0;
int chunk_size, chunk_offset;
char *resp = (char*) malloc(sizeof(char)*MAX_BUF_SZ);
int start_block = offset/CHUNK_SIZE;
int last_block = (offset+size-1)/CHUNK_SIZE;
#ifdef DEBUG
printf("start block = %d last block = %d size = %u offset = %llu\n", start_block, last_block, size, offset);
#endif
for(i=start_block;i<=last_block;i++) {
#ifdef DEBUG
printf("Chunk - %d\n", i);
#endif
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server\n",__func__);
return -1;
}
/* Send metadata request to master */
if ( i == start_block) {
chunk_offset = offset % CHUNK_SIZE;
} else {
chunk_offset = 0;
}
if ((size - size_read + chunk_offset) > CHUNK_SIZE) {
chunk_size = CHUNK_SIZE - chunk_offset;
} else {
chunk_size = size - size_read;
}
create_read_req(read_ptr,path,i, chunk_offset, chunk_size);
prepare_msg(READ_REQ, &msg, read_ptr, SMALL_BUF);
print_msg(msg->msg_iov[0].iov_base);
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed\n",__func__);
return -1;
}
/* reply from master - chunk metadata and location info */
if((recvmsg(master_soc,msg,0))==-1){
printf("%s: message receipt failed\n",__func__);
return -1;
} else {
dfsmsg = msg->msg_iov[0].iov_base;
/* No metadata for this chunk */
if (dfsmsg->status != 0)
break;
}
close(master_soc);
/* extract chunkserver details */
strcpy(resp,msg->msg_iov[1].iov_base);
printf("Read response is %s\n",resp);
strcpy(chunk_server.ip_addr,strtok(resp,":"));
chunk_server.port = atoi(strtok(NULL,":"));
strcpy(chunk_handle,strtok(NULL,":"));
/*strcpy(chunk_server.ip_addr,((read_resp*)dfsmsg -> data) ->ip_address);
chunk_server.port = ((read_resp*)dfsmsg->data) ->port;
strcpy(chunk_handle,((read_resp*)dfsmsg->data) ->chunk_handle);*/
/* conect to the chunk server */
if((chunk_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(chunk_server,chunk_soc) == -1){
printf("%s: can not connect to the chunk server\n",__func__);
return -1;
}
/* Preapare read-data request */
create_read_data_req(data_ptr,chunk_handle, chunk_offset, chunk_size);
free_msg(msg);
prepare_msg(READ_DATA_REQ, &msg, data_ptr, strlen(data_ptr));
print_msg(msg->msg_iov[0].iov_base);
/* Send read-data request to chunkserver */
if((sendmsg(chunk_soc,msg,0))==-1){
printf("%s: read request sending to chunkserver failed\n",__func__);
return -1;
} else {
printf("%s: Success: Sent read request\n",__func__);
}
/* Receive read-data reply from chunkserver */
free_msg(msg);
prepare_msg(READ_DATA_RESP, &msg, resp, MAX_BUF_SZ);
if((recvmsg(chunk_soc,msg,0))==-1){
printf("%s: read reply from chunkserver failed\n",__func__);
free(resp);
return -1;
} else {
printf("%s: Success: Received read reply from chunkserver\n",__func__);
}
/*TODO: process received data */
dfsmsg = msg->msg_iov[0].iov_base;
if(dfsmsg->status == 0) {
char *q;
int size;
/* Update number of bytes read */
resp = msg->msg_iov[1].iov_base;
size = atoi(strtok_r(resp,":",&q));
memcpy(buf+size_read, q, size);
#ifdef DEBUG
int j;
printf("Data read is - \n");
for (j = 0; j < CHUNK_SIZE; j++)
printf("%c", buf[j+size_read]);
printf("\n");
#endif
size_read += size;
if (size < chunk_size) {
break;
}
}
free_msg(msg);
close(chunk_soc);
}
free(resp);
/* Return number of bytes written */
#ifdef DEBUG
printf("No. of bytes Read successfully - %d\n", size_read);
#endif
return size_read;
}
basic_exception::basic_exception(const std::string& msg,
const basic_exception& cause) :
std::runtime_error(msg), my_cause(new basic_exception(cause)) {
prepare_msg();
}
static int gfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,off_t offset, struct fuse_file_info *fi)
{
struct msghdr *msg;
int master_soc;
struct stat st;
int ret;
char * tempbuf = (char*) malloc (1000);
char *file_name = (char*) malloc(1000);
strcpy(tempbuf, path);
prepare_msg(READDIR_REQ, &msg, tempbuf, 1000);
print_msg(msg->msg_iov[0].iov_base);
if((master_soc = createSocket())==-1){
printf("%s: Error creating socket\n",__func__);
return -1;
}
if(createConnection(master,master_soc) == -1){
printf("%s: can not connect to the master server - error-%d\n",__func__, errno);
return -1;
}
/* send a message to master */
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed - %d\n",__func__, errno);
return -1;
} else {
#ifdef DEBUG
printf("%s: readdir request sent\n",__func__);
#endif
}
/* reply from master */
while(1){
//free_msg(msg);
//prepare_msg(READDIR_RESP, &msg, &st, sizeof(struct stat));
if((recv(master_soc,file_name,1000,0))==-1){
printf("%s: message receipt failed - %d\n",__func__, errno);
return -1;
} else {
#ifdef DEBUG
printf("%s: received filename %s\n",__func__,file_name);
#endif
}
// if(((dfs_msg*)(msg->msg_iov[0]).iov_base)->status == -1)
if(strcmp(file_name,"END")==0)
break;
//dptr = &d;
free_msg(msg);
prepare_msg(READDIR_REQ, &msg, tempbuf, 1000);
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed - %d\n",__func__, errno);
return -1;
} else {
#ifdef DEBUG
printf("%s: request sent for stat\n",__func__);
#endif
}
//memcpy(&st,msg->msg_iov[1].iov_base, sizeof(struct stat));
//free_msg(msg);
//memset(file_name,0,MAX_BUF_SZ);
//prepare_msg(READDIR_RESP, &msg, file_name, sizeof(struct stat));
if((recv(master_soc,&st,sizeof(struct stat),0))==-1){
printf("%s: message receipt failed - %d\n",__func__, errno);
return -1;
}
//memcpy(file_name,msg->msg_iov[1].iov_base, MAX_BUF_SZ);
#ifdef DEBUG
printf("%s: received stat\n",__func__);
// printf("status is %d\n",((dfs_msg*)(msg->msg_iov[0]).iov_base)->status);
#endif
if (filler(buf, file_name+1, &st, 0)){ }
free_msg(msg);
prepare_msg(READDIR_REQ, &msg, tempbuf, 1000);
if((sendmsg(master_soc,msg,0))==-1){
printf("%s: message sending failed - %d\n",__func__, errno);
return -1;
} else {
#ifdef DEBUG
printf("%s: readdir request sent for next record\n",__func__);
#endif
}
}
close(master_soc);
return 0;
}
void* handle_client_request(void *arg)
{
struct msghdr *msg;
int soc = (int)arg;
char * data = (char *) malloc(MAX_BUF_SZ);
prepare_msg(0, &msg, data, MAX_BUF_SZ);
char * resp;
dfs_msg *dfsmsg;
int retval = recvmsg(soc, msg, 0);
if (retval == -1) {
printf("failed to receive message from client - errno-%d\n", errno);
} else {
dfsmsg = (dfs_msg*)msg->msg_iov[0].iov_base;
#ifdef DEBUG
printf("received message from client - %d bytes = %d\n", dfsmsg->msg_type, retval);
#endif
}
//extract the message type
print_msg(dfsmsg);
switch (dfsmsg->msg_type) {
case HEARTBEAT:
break;
case READ_DATA_REQ:
resp = (char*) malloc(sizeof(char)*MAX_BUF_SZ);
dfsmsg->status = chunk_read(msg->msg_iov[1].iov_base, resp);
msg->msg_iov[1].iov_base = resp;
msg->msg_iov[1].iov_len = strlen(resp)+1;
dfsmsg->msg_type = READ_DATA_RESP;
retval = sendmsg(soc, msg, 0);
if (retval == -1) {
printf("failed to send read reply to client - errno-%d\n", errno);
} else {
#ifdef DEBUG
printf("sent read reply to client\n");
#endif
}
break;
case WRITE_DATA_REQ:
dfsmsg->status = chunk_write(msg->msg_iov[1].iov_base);
dfsmsg->msg_type = WRITE_DATA_RESP;
retval = sendmsg(soc, msg, 0);
if (retval == -1) {
printf("failed to send write reply to client - errno-%d\n", errno);
} else {
#ifdef DEBUG
printf("sent write reply to client\n");
#endif
}
break;
case ROLLBACK_REQ:
dfsmsg->status = chunk_truncate(msg->msg_iov[1].iov_base);
dfsmsg->msg_type = ROLLBACK_RESP;
retval = sendmsg(soc, msg, 0);
if (retval == -1) {
printf("failed to send rollback reply to client - errno-%d\n", errno);
} else {
#ifdef DEBUG
printf("sent rollback reply to client\n");
#endif
}
break;
}
}