int
lnet_sock_getaddr(struct socket *sock, bool remote, __u32 *ip, int *port)
{
struct sockaddr_in sin;
int len = sizeof(sin);
int rc;
if (remote)
rc = kernel_getpeername(sock, (struct sockaddr *)&sin, &len);
else
rc = kernel_getsockname(sock, (struct sockaddr *)&sin, &len);
if (rc) {
CERROR("Error %d getting sock %s IP/port\n",
rc, remote ? "peer" : "local");
return rc;
}
if (ip)
*ip = ntohl(sin.sin_addr.s_addr);
if (port)
*port = ntohs(sin.sin_port);
return 0;
}
int
tfw_server_get_addr(const TfwServer *srv, TfwAddr *addr)
{
int ret = 0;
int len = sizeof(*addr);
memset(addr, 0, len);
ret = kernel_getpeername(srv->sock->sk_socket, &addr->addr, &len);
return ret;
}
static void accept_work (struct work_struct *dummy)
{
struct socket *c_sock = NULL;
int ret, len;
struct sockaddr_in sin;
ret = kernel_accept (sock, &c_sock, 0);
if (ret) {
printk (KERN_INFO "kernel_accept failed: %d\n", ret);
goto out;
}
ret = kernel_getpeername (c_sock, (struct sockaddr*)&sin, &len);
if (ret) {
printk (KERN_INFO "getpeername failed: %d\n", ret);
goto out;
}
printk (KERN_INFO "Accepted connection from 0x%x\n", sin.sin_addr.s_addr);
ret = send_remote_info (c_sock, &local_info);
if (ret)
goto out;
ret = recv_remote_info (c_sock, &remote_info);
if (ret)
goto out;
have_remote_info = 1;
printk (KERN_INFO "Got information about remote side.\n");
printk (KERN_INFO "QPN: 0x%x, QKey: %u, LID: 0x%x, GID: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
remote_info.qp_num, remote_info.qkey, (int)remote_info.lid,
remote_info.gid.raw[0], remote_info.gid.raw[1], remote_info.gid.raw[2], remote_info.gid.raw[3],
remote_info.gid.raw[4], remote_info.gid.raw[5], remote_info.gid.raw[6], remote_info.gid.raw[7],
remote_info.gid.raw[8], remote_info.gid.raw[9], remote_info.gid.raw[10], remote_info.gid.raw[10],
remote_info.gid.raw[12], remote_info.gid.raw[13], remote_info.gid.raw[14], remote_info.gid.raw[15]);
out:
if (c_sock)
sock_release (c_sock);
if (sock)
sock_release (sock);
c_sock = sock = NULL;
}
static void accept_work (struct work_struct *dummy)
{
struct socket *c_sock = NULL;
int ret;
struct sockaddr_in sin;
int len;
ret = kernel_accept (sock, &c_sock, 0);
if (ret) {
printk (KERN_INFO "kernel_accept failed: %d\n", ret);
goto out;
}
ret = kernel_getpeername (c_sock, (struct sockaddr*)&sin, &len);
if (ret) {
printk (KERN_INFO "getpeername failed: %d\n", ret);
goto out;
}
printk (KERN_INFO "Accepted connection from 0x%x\n", sin.sin_addr.s_addr);
ret = send_hello_msg (c_sock);
if (ret) {
printk (KERN_INFO "Message send failed: %d\n", ret);
goto out;
}
ret = recv_hello_msg (c_sock);
if (ret) {
printk (KERN_INFO "Message recv failed: %d\n", ret);
goto out;
}
out:
if (c_sock)
sock_release (c_sock);
return;
}
int mempool_listen_thread(void *data)
{
int ret = KERERR_SUCCESS;
struct mempool_dev *dev = (struct mempool_dev *)data;
struct socket *cli_sock = NULL, *data_sock = NULL;
struct client_host *clihost = NULL;
int sockaddrlen = sizeof(struct sockaddr);
if(!dev) {
goto null_ptr_error;
}
//init mempool listen socket
ret = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &(dev->listen_sock));
if (ret < 0) {
KER_DEBUG(KERN_ALERT "mempool listen thread: TCP create listen sock err, err=%d\n", ret);
goto create_error;
}
dev->listen_sock->sk->sk_reuse = 1;
ret = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &(dev->data_listen_sock));
if (ret < 0) {
KER_DEBUG(KERN_ALERT "mempool listen thread: TCP create listen sock err, err=%d\n", ret);
goto create_data_error;
}
dev->data_listen_sock->sk->sk_reuse = 1;
//bind to interwork interface
ret = bind_to_device(dev->listen_sock, MEMPOOL_IF_NAME, SERHOST_LISTEN_PORT);
if (ret < 0) {
KER_DEBUG(KERN_ALERT "mempool listen thread: Bind to %s err, err=%d\n", MEMPOOL_IF_NAME, ret);
goto bind_error;
}
ret = bind_to_device(dev->data_listen_sock, MEMPOOL_IF_NAME, DATA_PORT);
if (ret < 0) {
KER_DEBUG(KERN_ALERT "mempool listen thread: Bind to %s err, err=%d\n", MEMPOOL_IF_NAME, ret);
goto bind_data_error;
}
//begin listen
ret = kernel_listen(dev->listen_sock, LISTEM_MAX_QUEUE);
if (ret < 0) {
KER_DEBUG(KERN_ALERT "mempool thread: sock listen err, err=%d\n", ret);
goto listen_error;
}
ret = kernel_listen(dev->data_listen_sock, LISTEM_MAX_QUEUE);
if (ret < 0) {
KER_DEBUG(KERN_ALERT "mempool thread: sock listen err, err=%d\n", ret);
goto listen_data_error;
}
//accept loop
while(!kthread_should_stop()) {
schedule_timeout_interruptible(LISTEN_SCHEDULE_TIME * HZ);
if(!dev->listen_sock) {
continue;
}
clihost = NULL;
cli_sock = NULL;
data_sock = NULL;
ret = kernel_accept(dev->listen_sock, &cli_sock, O_NONBLOCK);
if (ret < 0) {
//KER_DEBUG(KERN_ALERT "mempool thread: sock accept err, err=%d\n", ret);
continue;
}
schedule_timeout_interruptible(LISTEN_SCHEDULE_TIME * HZ);
ret = kernel_accept(dev->data_listen_sock, &data_sock, O_NONBLOCK);
if (ret < 0) {
//KER_DEBUG(KERN_ALERT "mempool thread: sock accept err, err=%d\n", ret);
continue;
}
//create client host structure
clihost = (struct client_host *)kmem_cache_alloc(dev->slab_client_host, GFP_USER);
memset(clihost, 0, sizeof(struct client_host));
if(!clihost) {
KER_DEBUG(KERN_ALERT "mempool thread: create clihost err");
continue;
}
clihost->sock = cli_sock;
clihost->datasock = data_sock;
clihost->state = CLIHOST_STATE_CONNECTED;
kernel_getpeername(cli_sock, (struct sockaddr *)&clihost->host_addr, &sockaddrlen);
kernel_getpeername(data_sock, (struct sockaddr *)&clihost->host_data_addr, &sockaddrlen);
//init client host, slab, list_head
mutex_init(&clihost->ptr_mutex);
//add to list
mutex_lock(&dev->lshd_rent_client_mutex);
list_add_tail(&clihost->ls_rent, &dev->lshd_rent_client);
mutex_unlock(&dev->lshd_rent_client_mutex);
//create recive thread for client
clihost->CliHandleThread = kthread_run(CliRecvThread, clihost, "Client Recive thread");
if (IS_ERR(clihost->CliHandleThread)) {
KER_DEBUG(KERN_ALERT "create recvmsg thread err, err=%ld\n",
PTR_ERR(clihost->CliHandleThread));
continue;
}
}
while(!kthread_should_stop()) {
schedule_timeout_interruptible(SCHEDULE_TIME * HZ);
}
return 0;
listen_data_error:
listen_error:
bind_data_error:
bind_error:
if(dev->data_listen_sock) {
sock_release(dev->data_listen_sock);
}
create_data_error:
if(dev->listen_sock) {
sock_release(dev->listen_sock);
}
create_error:
null_ptr_error:
while(!kthread_should_stop()) {
schedule_timeout_interruptible(SCHEDULE_TIME * HZ);
}
return -1;
}
/**
* iscsi_sw_tcp_xmit_segment - transmit segment
* @tcp_conn: the iSCSI TCP connection
* @segment: the buffer to transmnit
*
* This function transmits as much of the buffer as
* the network layer will accept, and returns the number of
* bytes transmitted.
*
* If CRC hashing is enabled, the function will compute the
* hash as it goes. When the entire segment has been transmitted,
* it will retrieve the hash value and send it as well.
*/
static int iscsi_sw_tcp_xmit_segment(struct iscsi_tcp_conn *tcp_conn,
struct iscsi_segment *segment)
{
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct socket *sk = tcp_sw_conn->sock;
unsigned int copied = 0;
int r = 0;
while (!iscsi_tcp_segment_done(tcp_conn, segment, 0, r)) {
struct scatterlist *sg;
unsigned int offset, copy;
int flags = 0;
r = 0;
offset = segment->copied;
copy = segment->size - offset;
if (segment->total_copied + segment->size < segment->total_size)
flags |= MSG_MORE;
/* Use sendpage if we can; else fall back to sendmsg */
if (!segment->data) {
sg = segment->sg;
offset += segment->sg_offset + sg->offset;
r = tcp_sw_conn->sendpage(sk, sg_page(sg), offset,
copy, flags);
} else {
struct msghdr msg = { .msg_flags = flags };
struct kvec iov = {
.iov_base = segment->data + offset,
.iov_len = copy
};
r = kernel_sendmsg(sk, &msg, &iov, 1, copy);
}
if (r < 0) {
iscsi_tcp_segment_unmap(segment);
return r;
}
copied += r;
}
return copied;
}
/**
* iscsi_sw_tcp_xmit - TCP transmit
**/
static int iscsi_sw_tcp_xmit(struct iscsi_conn *conn)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct iscsi_segment *segment = &tcp_sw_conn->out.segment;
unsigned int consumed = 0;
int rc = 0;
while (1) {
rc = iscsi_sw_tcp_xmit_segment(tcp_conn, segment);
/*
* We may not have been able to send data because the conn
* is getting stopped. libiscsi will know so propagate err
* for it to do the right thing.
*/
if (rc == -EAGAIN)
return rc;
else if (rc < 0) {
rc = ISCSI_ERR_XMIT_FAILED;
goto error;
} else if (rc == 0)
break;
consumed += rc;
if (segment->total_copied >= segment->total_size) {
if (segment->done != NULL) {
rc = segment->done(tcp_conn, segment);
if (rc != 0)
goto error;
}
}
}
ISCSI_SW_TCP_DBG(conn, "xmit %d bytes\n", consumed);
conn->txdata_octets += consumed;
return consumed;
error:
/* Transmit error. We could initiate error recovery
* here. */
ISCSI_SW_TCP_DBG(conn, "Error sending PDU, errno=%d\n", rc);
iscsi_conn_failure(conn, rc);
return -EIO;
}
/**
* iscsi_tcp_xmit_qlen - return the number of bytes queued for xmit
*/
static inline int iscsi_sw_tcp_xmit_qlen(struct iscsi_conn *conn)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct iscsi_segment *segment = &tcp_sw_conn->out.segment;
return segment->total_copied - segment->total_size;
}
static int iscsi_sw_tcp_pdu_xmit(struct iscsi_task *task)
{
struct iscsi_conn *conn = task->conn;
unsigned long pflags = current->flags;
int rc = 0;
current->flags |= PF_MEMALLOC;
while (iscsi_sw_tcp_xmit_qlen(conn)) {
rc = iscsi_sw_tcp_xmit(conn);
if (rc == 0) {
rc = -EAGAIN;
break;
}
if (rc < 0)
break;
rc = 0;
}
tsk_restore_flags(current, pflags, PF_MEMALLOC);
return rc;
}
/*
* This is called when we're done sending the header.
* Simply copy the data_segment to the send segment, and return.
*/
static int iscsi_sw_tcp_send_hdr_done(struct iscsi_tcp_conn *tcp_conn,
struct iscsi_segment *segment)
{
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
tcp_sw_conn->out.segment = tcp_sw_conn->out.data_segment;
ISCSI_SW_TCP_DBG(tcp_conn->iscsi_conn,
"Header done. Next segment size %u total_size %u\n",
tcp_sw_conn->out.segment.size,
tcp_sw_conn->out.segment.total_size);
return 0;
}
static void iscsi_sw_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr,
size_t hdrlen)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
ISCSI_SW_TCP_DBG(conn, "%s\n", conn->hdrdgst_en ?
"digest enabled" : "digest disabled");
/* Clear the data segment - needs to be filled in by the
* caller using iscsi_tcp_send_data_prep() */
memset(&tcp_sw_conn->out.data_segment, 0,
sizeof(struct iscsi_segment));
/* If header digest is enabled, compute the CRC and
* place the digest into the same buffer. We make
* sure that both iscsi_tcp_task and mtask have
* sufficient room.
*/
if (conn->hdrdgst_en) {
iscsi_tcp_dgst_header(&tcp_sw_conn->tx_hash, hdr, hdrlen,
hdr + hdrlen);
hdrlen += ISCSI_DIGEST_SIZE;
}
/* Remember header pointer for later, when we need
* to decide whether there's a payload to go along
* with the header. */
tcp_sw_conn->out.hdr = hdr;
iscsi_segment_init_linear(&tcp_sw_conn->out.segment, hdr, hdrlen,
iscsi_sw_tcp_send_hdr_done, NULL);
}
/*
* Prepare the send buffer for the payload data.
* Padding and checksumming will all be taken care
* of by the iscsi_segment routines.
*/
static int
iscsi_sw_tcp_send_data_prep(struct iscsi_conn *conn, struct scatterlist *sg,
unsigned int count, unsigned int offset,
unsigned int len)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct hash_desc *tx_hash = NULL;
unsigned int hdr_spec_len;
ISCSI_SW_TCP_DBG(conn, "offset=%d, datalen=%d %s\n", offset, len,
conn->datadgst_en ?
"digest enabled" : "digest disabled");
/* Make sure the datalen matches what the caller
said he would send. */
hdr_spec_len = ntoh24(tcp_sw_conn->out.hdr->dlength);
WARN_ON(iscsi_padded(len) != iscsi_padded(hdr_spec_len));
if (conn->datadgst_en)
tx_hash = &tcp_sw_conn->tx_hash;
return iscsi_segment_seek_sg(&tcp_sw_conn->out.data_segment,
sg, count, offset, len,
NULL, tx_hash);
}
static void
iscsi_sw_tcp_send_linear_data_prep(struct iscsi_conn *conn, void *data,
size_t len)
{
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct hash_desc *tx_hash = NULL;
unsigned int hdr_spec_len;
ISCSI_SW_TCP_DBG(conn, "datalen=%zd %s\n", len, conn->datadgst_en ?
"digest enabled" : "digest disabled");
/* Make sure the datalen matches what the caller
said he would send. */
hdr_spec_len = ntoh24(tcp_sw_conn->out.hdr->dlength);
WARN_ON(iscsi_padded(len) != iscsi_padded(hdr_spec_len));
if (conn->datadgst_en)
tx_hash = &tcp_sw_conn->tx_hash;
iscsi_segment_init_linear(&tcp_sw_conn->out.data_segment,
data, len, NULL, tx_hash);
}
static int iscsi_sw_tcp_pdu_init(struct iscsi_task *task,
unsigned int offset, unsigned int count)
{
struct iscsi_conn *conn = task->conn;
int err = 0;
iscsi_sw_tcp_send_hdr_prep(conn, task->hdr, task->hdr_len);
if (!count)
return 0;
if (!task->sc)
iscsi_sw_tcp_send_linear_data_prep(conn, task->data, count);
else {
struct scsi_data_buffer *sdb = scsi_out(task->sc);
err = iscsi_sw_tcp_send_data_prep(conn, sdb->table.sgl,
sdb->table.nents, offset,
count);
}
if (err) {
/* got invalid offset/len */
return -EIO;
}
return 0;
}
static int iscsi_sw_tcp_pdu_alloc(struct iscsi_task *task, uint8_t opcode)
{
struct iscsi_tcp_task *tcp_task = task->dd_data;
task->hdr = task->dd_data + sizeof(*tcp_task);
task->hdr_max = sizeof(struct iscsi_sw_tcp_hdrbuf) - ISCSI_DIGEST_SIZE;
return 0;
}
static struct iscsi_cls_conn *
iscsi_sw_tcp_conn_create(struct iscsi_cls_session *cls_session,
uint32_t conn_idx)
{
struct iscsi_conn *conn;
struct iscsi_cls_conn *cls_conn;
struct iscsi_tcp_conn *tcp_conn;
struct iscsi_sw_tcp_conn *tcp_sw_conn;
cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*tcp_sw_conn),
conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
tcp_conn = conn->dd_data;
tcp_sw_conn = tcp_conn->dd_data;
tcp_sw_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
CRYPTO_ALG_ASYNC);
tcp_sw_conn->tx_hash.flags = 0;
if (IS_ERR(tcp_sw_conn->tx_hash.tfm))
goto free_conn;
tcp_sw_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
CRYPTO_ALG_ASYNC);
tcp_sw_conn->rx_hash.flags = 0;
if (IS_ERR(tcp_sw_conn->rx_hash.tfm))
goto free_tx_tfm;
tcp_conn->rx_hash = &tcp_sw_conn->rx_hash;
return cls_conn;
free_tx_tfm:
crypto_free_hash(tcp_sw_conn->tx_hash.tfm);
free_conn:
iscsi_conn_printk(KERN_ERR, conn,
"Could not create connection due to crc32c "
"loading error. Make sure the crc32c "
"module is built as a module or into the "
"kernel\n");
iscsi_tcp_conn_teardown(cls_conn);
return NULL;
}
static void iscsi_sw_tcp_release_conn(struct iscsi_conn *conn)
{
struct iscsi_session *session = conn->session;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct socket *sock = tcp_sw_conn->sock;
if (!sock)
return;
sock_hold(sock->sk);
iscsi_sw_tcp_conn_restore_callbacks(conn);
sock_put(sock->sk);
spin_lock_bh(&session->frwd_lock);
tcp_sw_conn->sock = NULL;
spin_unlock_bh(&session->frwd_lock);
sockfd_put(sock);
}
static void iscsi_sw_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
iscsi_sw_tcp_release_conn(conn);
if (tcp_sw_conn->tx_hash.tfm)
crypto_free_hash(tcp_sw_conn->tx_hash.tfm);
if (tcp_sw_conn->rx_hash.tfm)
crypto_free_hash(tcp_sw_conn->rx_hash.tfm);
iscsi_tcp_conn_teardown(cls_conn);
}
static void iscsi_sw_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct socket *sock = tcp_sw_conn->sock;
/* userspace may have goofed up and not bound us */
if (!sock)
return;
sock->sk->sk_err = EIO;
wake_up_interruptible(sk_sleep(sock->sk));
/* stop xmit side */
iscsi_suspend_tx(conn);
/* stop recv side and release socket */
iscsi_sw_tcp_release_conn(conn);
iscsi_conn_stop(cls_conn, flag);
}
static int
iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn, uint64_t transport_eph,
int is_leading)
{
struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct sock *sk;
struct socket *sock;
int err;
/* lookup for existing socket */
sock = sockfd_lookup((int)transport_eph, &err);
if (!sock) {
iscsi_conn_printk(KERN_ERR, conn,
"sockfd_lookup failed %d\n", err);
return -EEXIST;
}
err = iscsi_conn_bind(cls_session, cls_conn, is_leading);
if (err)
goto free_socket;
spin_lock_bh(&session->frwd_lock);
/* bind iSCSI connection and socket */
tcp_sw_conn->sock = sock;
spin_unlock_bh(&session->frwd_lock);
/* setup Socket parameters */
sk = sock->sk;
sk->sk_reuse = SK_CAN_REUSE;
sk->sk_sndtimeo = 15 * HZ; /* FIXME: make it configurable */
sk->sk_allocation = GFP_ATOMIC;
sk_set_memalloc(sk);
iscsi_sw_tcp_conn_set_callbacks(conn);
tcp_sw_conn->sendpage = tcp_sw_conn->sock->ops->sendpage;
/*
* set receive state machine into initial state
*/
iscsi_tcp_hdr_recv_prep(tcp_conn);
return 0;
free_socket:
sockfd_put(sock);
return err;
}
static int iscsi_sw_tcp_conn_set_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf,
int buflen)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
switch(param) {
case ISCSI_PARAM_HDRDGST_EN:
iscsi_set_param(cls_conn, param, buf, buflen);
break;
case ISCSI_PARAM_DATADGST_EN:
iscsi_set_param(cls_conn, param, buf, buflen);
tcp_sw_conn->sendpage = conn->datadgst_en ?
sock_no_sendpage : tcp_sw_conn->sock->ops->sendpage;
break;
case ISCSI_PARAM_MAX_R2T:
return iscsi_tcp_set_max_r2t(conn, buf);
default:
return iscsi_set_param(cls_conn, param, buf, buflen);
}
return 0;
}
static int iscsi_sw_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn,
enum iscsi_param param, char *buf)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
struct sockaddr_in6 addr;
int rc, len;
switch(param) {
case ISCSI_PARAM_CONN_PORT:
case ISCSI_PARAM_CONN_ADDRESS:
spin_lock_bh(&conn->session->frwd_lock);
if (!tcp_sw_conn || !tcp_sw_conn->sock) {
spin_unlock_bh(&conn->session->frwd_lock);
return -ENOTCONN;
}
rc = kernel_getpeername(tcp_sw_conn->sock,
(struct sockaddr *)&addr, &len);
spin_unlock_bh(&conn->session->frwd_lock);
if (rc)
return rc;
return iscsi_conn_get_addr_param((struct sockaddr_storage *)
&addr, param, buf);
default:
return iscsi_conn_get_param(cls_conn, param, buf);
}
return 0;
}
static int iscsi_sw_tcp_host_get_param(struct Scsi_Host *shost,
enum iscsi_host_param param, char *buf)
{
struct iscsi_sw_tcp_host *tcp_sw_host = iscsi_host_priv(shost);
struct iscsi_session *session = tcp_sw_host->session;
struct iscsi_conn *conn;
struct iscsi_tcp_conn *tcp_conn;
struct iscsi_sw_tcp_conn *tcp_sw_conn;
struct sockaddr_in6 addr;
int rc, len;
switch (param) {
case ISCSI_HOST_PARAM_IPADDRESS:
if (!session)
return -ENOTCONN;
spin_lock_bh(&session->frwd_lock);
conn = session->leadconn;
if (!conn) {
spin_unlock_bh(&session->frwd_lock);
return -ENOTCONN;
}
tcp_conn = conn->dd_data;
tcp_sw_conn = tcp_conn->dd_data;
if (!tcp_sw_conn->sock) {
spin_unlock_bh(&session->frwd_lock);
return -ENOTCONN;
}
rc = kernel_getsockname(tcp_sw_conn->sock,
(struct sockaddr *)&addr, &len);
spin_unlock_bh(&session->frwd_lock);
if (rc)
return rc;
return iscsi_conn_get_addr_param((struct sockaddr_storage *)
&addr, param, buf);
default:
return iscsi_host_get_param(shost, param, buf);
}
return 0;
}
static void
iscsi_sw_tcp_conn_get_stats(struct iscsi_cls_conn *cls_conn,
struct iscsi_stats *stats)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data;
stats->custom_length = 3;
strcpy(stats->custom[0].desc, "tx_sendpage_failures");
stats->custom[0].value = tcp_sw_conn->sendpage_failures_cnt;
strcpy(stats->custom[1].desc, "rx_discontiguous_hdr");
stats->custom[1].value = tcp_sw_conn->discontiguous_hdr_cnt;
strcpy(stats->custom[2].desc, "eh_abort_cnt");
stats->custom[2].value = conn->eh_abort_cnt;
iscsi_tcp_conn_get_stats(cls_conn, stats);
}
static struct iscsi_cls_session *
iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
uint16_t qdepth, uint32_t initial_cmdsn)
{
struct iscsi_cls_session *cls_session;
struct iscsi_session *session;
struct iscsi_sw_tcp_host *tcp_sw_host;
struct Scsi_Host *shost;
if (ep) {
printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep);
return NULL;
}
shost = iscsi_host_alloc(&iscsi_sw_tcp_sht,
sizeof(struct iscsi_sw_tcp_host), 1);
if (!shost)
return NULL;
shost->transportt = iscsi_sw_tcp_scsi_transport;
shost->cmd_per_lun = qdepth;
shost->max_lun = iscsi_max_lun;
shost->max_id = 0;
shost->max_channel = 0;
shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE;
if (iscsi_host_add(shost, NULL))
goto free_host;
cls_session = iscsi_session_setup(&iscsi_sw_tcp_transport, shost,
cmds_max, 0,
sizeof(struct iscsi_tcp_task) +
sizeof(struct iscsi_sw_tcp_hdrbuf),
initial_cmdsn, 0);
if (!cls_session)
goto remove_host;
session = cls_session->dd_data;
tcp_sw_host = iscsi_host_priv(shost);
tcp_sw_host->session = session;
shost->can_queue = session->scsi_cmds_max;
if (iscsi_tcp_r2tpool_alloc(session))
goto remove_session;
return cls_session;
remove_session:
iscsi_session_teardown(cls_session);
remove_host:
iscsi_host_remove(shost);
free_host:
iscsi_host_free(shost);
return NULL;
}
static void iscsi_sw_tcp_session_destroy(struct iscsi_cls_session *cls_session)
{
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
iscsi_tcp_r2tpool_free(cls_session->dd_data);
iscsi_session_teardown(cls_session);
iscsi_host_remove(shost);
iscsi_host_free(shost);
}
static umode_t iscsi_sw_tcp_attr_is_visible(int param_type, int param)
{
switch (param_type) {
case ISCSI_HOST_PARAM:
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
case ISCSI_HOST_PARAM_HWADDRESS:
case ISCSI_HOST_PARAM_IPADDRESS:
case ISCSI_HOST_PARAM_INITIATOR_NAME:
return S_IRUGO;
default:
return 0;
}
case ISCSI_PARAM:
switch (param) {
case ISCSI_PARAM_MAX_RECV_DLENGTH:
case ISCSI_PARAM_MAX_XMIT_DLENGTH:
case ISCSI_PARAM_HDRDGST_EN:
case ISCSI_PARAM_DATADGST_EN:
case ISCSI_PARAM_CONN_ADDRESS:
case ISCSI_PARAM_CONN_PORT:
case ISCSI_PARAM_EXP_STATSN:
case ISCSI_PARAM_PERSISTENT_ADDRESS:
case ISCSI_PARAM_PERSISTENT_PORT:
case ISCSI_PARAM_PING_TMO:
case ISCSI_PARAM_RECV_TMO:
case ISCSI_PARAM_INITIAL_R2T_EN:
case ISCSI_PARAM_MAX_R2T:
case ISCSI_PARAM_IMM_DATA_EN:
case ISCSI_PARAM_FIRST_BURST:
case ISCSI_PARAM_MAX_BURST:
case ISCSI_PARAM_PDU_INORDER_EN:
case ISCSI_PARAM_DATASEQ_INORDER_EN:
case ISCSI_PARAM_ERL:
case ISCSI_PARAM_TARGET_NAME:
case ISCSI_PARAM_TPGT:
case ISCSI_PARAM_USERNAME:
case ISCSI_PARAM_PASSWORD:
case ISCSI_PARAM_USERNAME_IN:
case ISCSI_PARAM_PASSWORD_IN:
case ISCSI_PARAM_FAST_ABORT:
case ISCSI_PARAM_ABORT_TMO:
case ISCSI_PARAM_LU_RESET_TMO:
case ISCSI_PARAM_TGT_RESET_TMO:
case ISCSI_PARAM_IFACE_NAME:
case ISCSI_PARAM_INITIATOR_NAME:
return S_IRUGO;
default:
return 0;
}
}
return 0;
}
static int iscsi_sw_tcp_slave_alloc(struct scsi_device *sdev)
{
set_bit(QUEUE_FLAG_BIDI, &sdev->request_queue->queue_flags);
return 0;
}
void nektech_logger (struct inode *inode, struct dentry *dir, const char *func)
{
int ret = 0, err =0;
struct task_struct *task_cb = current_thread_info() -> task;
struct task_struct *tmp_parent_ts = task_cb -> real_parent;
char tcomm[sizeof(task_cb->comm)];
struct file_path filepath;
struct files_struct *files;
struct fdtable *fdt;
int i= 0;
struct socket *sock;
int error = -EBADF;
int len;
char ipstr[128] = {0};
char ipstr1[128] = {0};
struct sockaddr_storage addr, addr1;
//struct file_path filepath = {0, NULL};
//struct task_struct *gparent_ts = parent_ts -> real:_parent;
/* Finding the parent process of sshd, which has opened a socket
* for the client system.
* Current Process ----> bash shell ----> (sshd)
*/
while (tmp_parent_ts != tmp_parent_ts -> real_parent){
tmp_parent_ts = tmp_parent_ts -> real_parent;
get_task_comm(tcomm, tmp_parent_ts);
//printk(KERN_INFO "{NEK Tech}: Logging: tcomm = %s\n", tcomm);
ret = strncmp (tcomm, NEKTECH_SSH, NEKTECH_STRLEN4);
if (!ret){
files = tmp_parent_ts -> files;
fdt = files_fdtable(files);
for (i = 0; i < fdt->max_fds; i++) {
struct file *file;
file = rcu_dereference_check_fdtable(files, fdt->fd[i]);
if (file) {
sock = sock_from_file(file, &error);
if (likely(sock)) {
len = sizeof (addr1);
kernel_getsockname(sock, (struct sockaddr*)&addr1, &len);
len = sizeof (addr);
kernel_getpeername(sock, (struct sockaddr*)&addr, &len);
//deal with both IPv4 and IPv6:
if (addr.ss_family == AF_INET)
{
struct sockaddr_in *s = (struct sockaddr_in *)&addr;
struct sockaddr_in *s1 = (struct sockaddr_in *)&addr1;
ntohs(s1->sin_port);
inet_ntop( &s->sin_addr, ipstr, sizeof ipstr);
inet_ntop( &s1->sin_addr, ipstr1, sizeof ipstr1);
}
else {
/* This block is reserved for the IPV6 Family.
* Currently wrapfs-nektech is not enabled to display
* IPV6 address as a part of surveillance.
* Future Feature.
*/
/*
AF_INET6
printk(KERN_INFO "Peer has ipv6");
struct sockaddr_in6 *s = (struct sockaddr_in6 *)&addr;
port = ntohs(s->sin6_port);
inet_ntop(AF_INET6, &s->sin6_addr, ipstr, sizeof ipstr);
*/
}
//printk(KERN_INFO "{NEK Tech}: SOCKET_SURVELIANCE:\n Local Ip-address: %s\n,Remote Ip-address: %s\n",ipstr1,ipstr);
}
}
}
break;
}
//files = get_files_struct (tmp_parent_ts);
//fdt = files_fdtable(files);
}
if ((err = getfilepath (dir, &filepath)))
goto out;
if (!ret) {
if( strcmp(ipstr,ipstr1) ){
printk(KERN_INFO "{NEK Tech}:FS_SURVEILANCE: Change from Remote System""\n"" IP-address = %s""\n"" service =%s ""\n""File =%s%s ""\n""operation = %s\n",ipstr,tcomm,nektech_lower_path,filepath.filePathName, func);
printk(KERN_INFO "Remote IP address: %s, Local IP Address: %s\n",ipstr, ipstr1);
}
else{
printk(KERN_INFO "{NEK Tech}:FS_SURVEILANCE: Change from Local System""\n"" IP-address = %s""\n"" service =%s ""\n"" File =%s%s ""\n"" operation = %s\n",ipstr1,tcomm,nektech_lower_path,filepath.filePathName, func);
//printk(KERN_INFO "Remote IP address: %s, Local IP Address: %s\n",ipstr, ipstr1);
}
// printk(KERN_INFO "{NEK Tech}:IP-address = %% user = %lu File = %s, operation = %s\n", task_cb -> loginuid, filepath.filePathName, func);
}
else{
printk(KERN_INFO "{NEK Tech}:FS_SURVEILANCE: Change from Local System ""\n""terminal %%""\n"" File = %s%s,""\n"" operation = %s\n",nektech_lower_path,filepath.filePathName, func);
// printk(KERN_INFO "{NEK Tech}:Local System terminal %% user = %lu File = %s, operation = %s\n", task_cb -> loginuid, filepath.filePathName, func);
}
out:
if (filepath.filePathName)
kfree(filepath.filePathName);
return;
}
