linux/fs/ncpfs/sock.c

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/*
* linux/fs/ncpfs/sock.c
*
* Copyright (C) 1992, 1993 Rick Sladkey
*
* Modified 1995, 1996 by Volker Lendecke to be usable for ncp
* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
*
*/
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/socket.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <asm/uaccess.h>
#include <linux/in.h>
#include <linux/net.h>
#include <linux/mm.h>
#include <linux/netdevice.h>
#include <linux/signal.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <net/scm.h>
#include <net/sock.h>
#include <linux/ipx.h>
#include <linux/poll.h>
#include <linux/file.h>
#include "ncp_fs.h"
#include "ncpsign_kernel.h"
static int _recv(struct socket *sock, void *buf, int size, unsigned flags)
{
struct msghdr msg = {NULL, };
struct kvec iov = {buf, size};
return kernel_recvmsg(sock, &msg, &iov, 1, size, flags);
}
static inline int do_send(struct socket *sock, struct kvec *vec, int count,
int len, unsigned flags)
{
struct msghdr msg = { .msg_flags = flags };
return kernel_sendmsg(sock, &msg, vec, count, len);
}
static int _send(struct socket *sock, const void *buff, int len)
{
struct kvec vec;
vec.iov_base = (void *) buff;
vec.iov_len = len;
return do_send(sock, &vec, 1, len, 0);
}
struct ncp_request_reply {
struct list_head req;
wait_queue_head_t wq;
atomic_t refs;
unsigned char* reply_buf;
size_t datalen;
int result;
enum { RQ_DONE, RQ_INPROGRESS, RQ_QUEUED, RQ_IDLE, RQ_ABANDONED } status;
struct kvec* tx_ciov;
size_t tx_totallen;
size_t tx_iovlen;
struct kvec tx_iov[3];
u_int16_t tx_type;
u_int32_t sign[6];
};
static inline struct ncp_request_reply* ncp_alloc_req(void)
{
struct ncp_request_reply *req;
req = kmalloc(sizeof(struct ncp_request_reply), GFP_KERNEL);
if (!req)
return NULL;
init_waitqueue_head(&req->wq);
atomic_set(&req->refs, (1));
req->status = RQ_IDLE;
return req;
}
static void ncp_req_get(struct ncp_request_reply *req)
{
atomic_inc(&req->refs);
}
static void ncp_req_put(struct ncp_request_reply *req)
{
if (atomic_dec_and_test(&req->refs))
kfree(req);
}
void ncp_tcp_data_ready(struct sock *sk, int len)
{
struct ncp_server *server = sk->sk_user_data;
server->data_ready(sk, len);
schedule_work(&server->rcv.tq);
}
void ncp_tcp_error_report(struct sock *sk)
{
struct ncp_server *server = sk->sk_user_data;
server->error_report(sk);
schedule_work(&server->rcv.tq);
}
void ncp_tcp_write_space(struct sock *sk)
{
struct ncp_server *server = sk->sk_user_data;
/* We do not need any locking: we first set tx.creq, and then we do sendmsg,
not vice versa... */
server->write_space(sk);
if (server->tx.creq)
schedule_work(&server->tx.tq);
}
void ncpdgram_timeout_call(unsigned long v)
{
struct ncp_server *server = (void*)v;
schedule_work(&server->timeout_tq);
}
static inline void ncp_finish_request(struct ncp_server *server, struct ncp_request_reply *req, int result)
{
req->result = result;
if (req->status != RQ_ABANDONED)
memcpy(req->reply_buf, server->rxbuf, req->datalen);
req->status = RQ_DONE;
wake_up_all(&req->wq);
ncp_req_put(req);
}
static void __abort_ncp_connection(struct ncp_server *server)
{
struct ncp_request_reply *req;
ncp_invalidate_conn(server);
del_timer(&server->timeout_tm);
while (!list_empty(&server->tx.requests)) {
req = list_entry(server->tx.requests.next, struct ncp_request_reply, req);
list_del_init(&req->req);
ncp_finish_request(server, req, -EIO);
}
req = server->rcv.creq;
if (req) {
server->rcv.creq = NULL;
ncp_finish_request(server, req, -EIO);
server->rcv.ptr = NULL;
server->rcv.state = 0;
}
req = server->tx.creq;
if (req) {
server->tx.creq = NULL;
ncp_finish_request(server, req, -EIO);
}
}
static inline int get_conn_number(struct ncp_reply_header *rp)
{
return rp->conn_low | (rp->conn_high << 8);
}
static inline void __ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err)
{
/* If req is done, we got signal, but we also received answer... */
switch (req->status) {
case RQ_IDLE:
case RQ_DONE:
break;
case RQ_QUEUED:
list_del_init(&req->req);
ncp_finish_request(server, req, err);
break;
case RQ_INPROGRESS:
req->status = RQ_ABANDONED;
break;
case RQ_ABANDONED:
break;
}
}
static inline void ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err)
{
mutex_lock(&server->rcv.creq_mutex);
__ncp_abort_request(server, req, err);
mutex_unlock(&server->rcv.creq_mutex);
}
static inline void __ncptcp_abort(struct ncp_server *server)
{
__abort_ncp_connection(server);
}
static int ncpdgram_send(struct socket *sock, struct ncp_request_reply *req)
{
struct kvec vec[3];
/* sock_sendmsg updates iov pointers for us :-( */
memcpy(vec, req->tx_ciov, req->tx_iovlen * sizeof(vec[0]));
return do_send(sock, vec, req->tx_iovlen,
req->tx_totallen, MSG_DONTWAIT);
}
static void __ncptcp_try_send(struct ncp_server *server)
{
struct ncp_request_reply *rq;
struct kvec *iov;
struct kvec iovc[3];
int result;
rq = server->tx.creq;
if (!rq)
return;
/* sock_sendmsg updates iov pointers for us :-( */
memcpy(iovc, rq->tx_ciov, rq->tx_iovlen * sizeof(iov[0]));
result = do_send(server->ncp_sock, iovc, rq->tx_iovlen,
rq->tx_totallen, MSG_NOSIGNAL | MSG_DONTWAIT);
if (result == -EAGAIN)
return;
if (result < 0) {
printk(KERN_ERR "ncpfs: tcp: Send failed: %d\n", result);
__ncp_abort_request(server, rq, result);
return;
}
if (result >= rq->tx_totallen) {
server->rcv.creq = rq;
server->tx.creq = NULL;
return;
}
rq->tx_totallen -= result;
iov = rq->tx_ciov;
while (iov->iov_len <= result) {
result -= iov->iov_len;
iov++;
rq->tx_iovlen--;
}
iov->iov_base += result;
iov->iov_len -= result;
rq->tx_ciov = iov;
}
static inline void ncp_init_header(struct ncp_server *server, struct ncp_request_reply *req, struct ncp_request_header *h)
{
req->status = RQ_INPROGRESS;
h->conn_low = server->connection;
h->conn_high = server->connection >> 8;
h->sequence = ++server->sequence;
}
static void ncpdgram_start_request(struct ncp_server *server, struct ncp_request_reply *req)
{
size_t signlen;
struct ncp_request_header* h;
req->tx_ciov = req->tx_iov + 1;
h = req->tx_iov[1].iov_base;
ncp_init_header(server, req, h);
signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1,
req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1,
cpu_to_le32(req->tx_totallen), req->sign);
if (signlen) {
req->tx_ciov[1].iov_base = req->sign;
req->tx_ciov[1].iov_len = signlen;
req->tx_iovlen += 1;
req->tx_totallen += signlen;
}
server->rcv.creq = req;
server->timeout_last = server->m.time_out;
server->timeout_retries = server->m.retry_count;
ncpdgram_send(server->ncp_sock, req);
mod_timer(&server->timeout_tm, jiffies + server->m.time_out);
}
#define NCP_TCP_XMIT_MAGIC (0x446D6454)
#define NCP_TCP_XMIT_VERSION (1)
#define NCP_TCP_RCVD_MAGIC (0x744E6350)
static void ncptcp_start_request(struct ncp_server *server, struct ncp_request_reply *req)
{
size_t signlen;
struct ncp_request_header* h;
req->tx_ciov = req->tx_iov;
h = req->tx_iov[1].iov_base;
ncp_init_header(server, req, h);
signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1,
req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1,
cpu_to_be32(req->tx_totallen + 24), req->sign + 4) + 16;
req->sign[0] = htonl(NCP_TCP_XMIT_MAGIC);
req->sign[1] = htonl(req->tx_totallen + signlen);
req->sign[2] = htonl(NCP_TCP_XMIT_VERSION);
req->sign[3] = htonl(req->datalen + 8);
req->tx_iov[0].iov_base = req->sign;
req->tx_iov[0].iov_len = signlen;
req->tx_iovlen += 1;
req->tx_totallen += signlen;
server->tx.creq = req;
__ncptcp_try_send(server);
}
static inline void __ncp_start_request(struct ncp_server *server, struct ncp_request_reply *req)
{
/* we copy the data so that we do not depend on the caller
staying alive */
memcpy(server->txbuf, req->tx_iov[1].iov_base, req->tx_iov[1].iov_len);
req->tx_iov[1].iov_base = server->txbuf;
if (server->ncp_sock->type == SOCK_STREAM)
ncptcp_start_request(server, req);
else
ncpdgram_start_request(server, req);
}
static int ncp_add_request(struct ncp_server *server, struct ncp_request_reply *req)
{
mutex_lock(&server->rcv.creq_mutex);
if (!ncp_conn_valid(server)) {
mutex_unlock(&server->rcv.creq_mutex);
printk(KERN_ERR "ncpfs: tcp: Server died\n");
return -EIO;
}
ncp_req_get(req);
if (server->tx.creq || server->rcv.creq) {
req->status = RQ_QUEUED;
list_add_tail(&req->req, &server->tx.requests);
mutex_unlock(&server->rcv.creq_mutex);
return 0;
}
__ncp_start_request(server, req);
mutex_unlock(&server->rcv.creq_mutex);
return 0;
}
static void __ncp_next_request(struct ncp_server *server)
{
struct ncp_request_reply *req;
server->rcv.creq = NULL;
if (list_empty(&server->tx.requests)) {
return;
}
req = list_entry(server->tx.requests.next, struct ncp_request_reply, req);
list_del_init(&req->req);
__ncp_start_request(server, req);
}
static void info_server(struct ncp_server *server, unsigned int id, const void * data, size_t len)
{
if (server->info_sock) {
struct kvec iov[2];
__be32 hdr[2];
hdr[0] = cpu_to_be32(len + 8);
hdr[1] = cpu_to_be32(id);
iov[0].iov_base = hdr;
iov[0].iov_len = 8;
iov[1].iov_base = (void *) data;
iov[1].iov_len = len;
do_send(server->info_sock, iov, 2, len + 8, MSG_NOSIGNAL);
}
}
void ncpdgram_rcv_proc(struct work_struct *work)
{
struct ncp_server *server =
container_of(work, struct ncp_server, rcv.tq);
struct socket* sock;
sock = server->ncp_sock;
while (1) {
struct ncp_reply_header reply;
int result;
result = _recv(sock, &reply, sizeof(reply), MSG_PEEK | MSG_DONTWAIT);
if (result < 0) {
break;
}
if (result >= sizeof(reply)) {
struct ncp_request_reply *req;
if (reply.type == NCP_WATCHDOG) {
unsigned char buf[10];
if (server->connection != get_conn_number(&reply)) {
goto drop;
}
result = _recv(sock, buf, sizeof(buf), MSG_DONTWAIT);
if (result < 0) {
DPRINTK("recv failed with %d\n", result);
continue;
}
if (result < 10) {
DPRINTK("too short (%u) watchdog packet\n", result);
continue;
}
if (buf[9] != '?') {
DPRINTK("bad signature (%02X) in watchdog packet\n", buf[9]);
continue;
}
buf[9] = 'Y';
_send(sock, buf, sizeof(buf));
continue;
}
if (reply.type != NCP_POSITIVE_ACK && reply.type != NCP_REPLY) {
result = _recv(sock, server->unexpected_packet.data, sizeof(server->unexpected_packet.data), MSG_DONTWAIT);
if (result < 0) {
continue;
}
info_server(server, 0, server->unexpected_packet.data, result);
continue;
}
mutex_lock(&server->rcv.creq_mutex);
req = server->rcv.creq;
if (req && (req->tx_type == NCP_ALLOC_SLOT_REQUEST || (server->sequence == reply.sequence &&
server->connection == get_conn_number(&reply)))) {
if (reply.type == NCP_POSITIVE_ACK) {
server->timeout_retries = server->m.retry_count;
server->timeout_last = NCP_MAX_RPC_TIMEOUT;
mod_timer(&server->timeout_tm, jiffies + NCP_MAX_RPC_TIMEOUT);
} else if (reply.type == NCP_REPLY) {
result = _recv(sock, server->rxbuf, req->datalen, MSG_DONTWAIT);
#ifdef CONFIG_NCPFS_PACKET_SIGNING
if (result >= 0 && server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) {
if (result < 8 + 8) {
result = -EIO;
} else {
unsigned int hdrl;
result -= 8;
hdrl = sock->sk->sk_family == AF_INET ? 8 : 6;
if (sign_verify_reply(server, server->rxbuf + hdrl, result - hdrl, cpu_to_le32(result), server->rxbuf + result)) {
printk(KERN_INFO "ncpfs: Signature violation\n");
result = -EIO;
}
}
}
#endif
del_timer(&server->timeout_tm);
server->rcv.creq = NULL;
ncp_finish_request(server, req, result);
__ncp_next_request(server);
mutex_unlock(&server->rcv.creq_mutex);
continue;
}
}
mutex_unlock(&server->rcv.creq_mutex);
}
drop:;
_recv(sock, &reply, sizeof(reply), MSG_DONTWAIT);
}
}
static void __ncpdgram_timeout_proc(struct ncp_server *server)
{
/* If timer is pending, we are processing another request... */
if (!timer_pending(&server->timeout_tm)) {
struct ncp_request_reply* req;
req = server->rcv.creq;
if (req) {
int timeout;
if (server->m.flags & NCP_MOUNT_SOFT) {
if (server->timeout_retries-- == 0) {
__ncp_abort_request(server, req, -ETIMEDOUT);
return;
}
}
/* Ignore errors */
ncpdgram_send(server->ncp_sock, req);
timeout = server->timeout_last << 1;
if (timeout > NCP_MAX_RPC_TIMEOUT) {
timeout = NCP_MAX_RPC_TIMEOUT;
}
server->timeout_last = timeout;
mod_timer(&server->timeout_tm, jiffies + timeout);
}
}
}
void ncpdgram_timeout_proc(struct work_struct *work)
{
struct ncp_server *server =
container_of(work, struct ncp_server, timeout_tq);
mutex_lock(&server->rcv.creq_mutex);
__ncpdgram_timeout_proc(server);
mutex_unlock(&server->rcv.creq_mutex);
}
static int do_tcp_rcv(struct ncp_server *server, void *buffer, size_t len)
{
int result;
if (buffer) {
result = _recv(server->ncp_sock, buffer, len, MSG_DONTWAIT);
} else {
static unsigned char dummy[1024];
if (len > sizeof(dummy)) {
len = sizeof(dummy);
}
result = _recv(server->ncp_sock, dummy, len, MSG_DONTWAIT);
}
if (result < 0) {
return result;
}
if (result > len) {
printk(KERN_ERR "ncpfs: tcp: bug in recvmsg (%u > %Zu)\n", result, len);
return -EIO;
}
return result;
}
static int __ncptcp_rcv_proc(struct ncp_server *server)
{
/* We have to check the result, so store the complete header */
while (1) {
int result;
struct ncp_request_reply *req;
int datalen;
int type;
while (server->rcv.len) {
result = do_tcp_rcv(server, server->rcv.ptr, server->rcv.len);
if (result == -EAGAIN) {
return 0;
}
if (result <= 0) {
req = server->rcv.creq;
if (req) {
__ncp_abort_request(server, req, -EIO);
} else {
__ncptcp_abort(server);
}
if (result < 0) {
printk(KERN_ERR "ncpfs: tcp: error in recvmsg: %d\n", result);
} else {
DPRINTK(KERN_ERR "ncpfs: tcp: EOF\n");
}
return -EIO;
}
if (server->rcv.ptr) {
server->rcv.ptr += result;
}
server->rcv.len -= result;
}
switch (server->rcv.state) {
case 0:
if (server->rcv.buf.magic != htonl(NCP_TCP_RCVD_MAGIC)) {
printk(KERN_ERR "ncpfs: tcp: Unexpected reply type %08X\n", ntohl(server->rcv.buf.magic));
__ncptcp_abort(server);
return -EIO;
}
datalen = ntohl(server->rcv.buf.len) & 0x0FFFFFFF;
if (datalen < 10) {
printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen);
__ncptcp_abort(server);
return -EIO;
}
#ifdef CONFIG_NCPFS_PACKET_SIGNING
if (server->sign_active) {
if (datalen < 18) {
printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen);
__ncptcp_abort(server);
return -EIO;
}
server->rcv.buf.len = datalen - 8;
server->rcv.ptr = (unsigned char*)&server->rcv.buf.p1;
server->rcv.len = 8;
server->rcv.state = 4;
break;
}
#endif
type = ntohs(server->rcv.buf.type);
#ifdef CONFIG_NCPFS_PACKET_SIGNING
cont:;
#endif
if (type != NCP_REPLY) {
if (datalen - 8 <= sizeof(server->unexpected_packet.data)) {
*(__u16*)(server->unexpected_packet.data) = htons(type);
server->unexpected_packet.len = datalen - 8;
server->rcv.state = 5;
server->rcv.ptr = server->unexpected_packet.data + 2;
server->rcv.len = datalen - 10;
break;
}
DPRINTK("ncpfs: tcp: Unexpected NCP type %02X\n", type);
skipdata2:;
server->rcv.state = 2;
skipdata:;
server->rcv.ptr = NULL;
server->rcv.len = datalen - 10;
break;
}
req = server->rcv.creq;
if (!req) {
DPRINTK(KERN_ERR "ncpfs: Reply without appropriate request\n");
goto skipdata2;
}
if (datalen > req->datalen + 8) {
printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d (expected at most %Zd)\n", datalen, req->datalen + 8);
server->rcv.state = 3;
goto skipdata;
}
req->datalen = datalen - 8;
((struct ncp_reply_header*)server->rxbuf)->type = NCP_REPLY;
server->rcv.ptr = server->rxbuf + 2;
server->rcv.len = datalen - 10;
server->rcv.state = 1;
break;
#ifdef CONFIG_NCPFS_PACKET_SIGNING
case 4:
datalen = server->rcv.buf.len;
type = ntohs(server->rcv.buf.type2);
goto cont;
#endif
case 1:
req = server->rcv.creq;
if (req->tx_type != NCP_ALLOC_SLOT_REQUEST) {
if (((struct ncp_reply_header*)server->rxbuf)->sequence != server->sequence) {
printk(KERN_ERR "ncpfs: tcp: Bad sequence number\n");
__ncp_abort_request(server, req, -EIO);
return -EIO;
}
if ((((struct ncp_reply_header*)server->rxbuf)->conn_low | (((struct ncp_reply_header*)server->rxbuf)->conn_high << 8)) != server->connection) {
printk(KERN_ERR "ncpfs: tcp: Connection number mismatch\n");
__ncp_abort_request(server, req, -EIO);
return -EIO;
}
}
#ifdef CONFIG_NCPFS_PACKET_SIGNING
if (server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) {
if (sign_verify_reply(server, server->rxbuf + 6, req->datalen - 6, cpu_to_be32(req->datalen + 16), &server->rcv.buf.type)) {
printk(KERN_ERR "ncpfs: tcp: Signature violation\n");
__ncp_abort_request(server, req, -EIO);
return -EIO;
}
}
#endif
ncp_finish_request(server, req, req->datalen);
nextreq:;
__ncp_next_request(server);
case 2:
next:;
server->rcv.ptr = (unsigned char*)&server->rcv.buf;
server->rcv.len = 10;
server->rcv.state = 0;
break;
case 3:
ncp_finish_request(server, server->rcv.creq, -EIO);
goto nextreq;
case 5:
info_server(server, 0, server->unexpected_packet.data, server->unexpected_packet.len);
goto next;
}
}
}
void ncp_tcp_rcv_proc(struct work_struct *work)
{
struct ncp_server *server =
container_of(work, struct ncp_server, rcv.tq);
mutex_lock(&server->rcv.creq_mutex);
__ncptcp_rcv_proc(server);
mutex_unlock(&server->rcv.creq_mutex);
}
void ncp_tcp_tx_proc(struct work_struct *work)
{
struct ncp_server *server =
container_of(work, struct ncp_server, tx.tq);
mutex_lock(&server->rcv.creq_mutex);
__ncptcp_try_send(server);
mutex_unlock(&server->rcv.creq_mutex);
}
static int do_ncp_rpc_call(struct ncp_server *server, int size,
unsigned char* reply_buf, int max_reply_size)
{
int result;
struct ncp_request_reply *req;
req = ncp_alloc_req();
if (!req)
return -ENOMEM;
req->reply_buf = reply_buf;
req->datalen = max_reply_size;
req->tx_iov[1].iov_base = server->packet;
req->tx_iov[1].iov_len = size;
req->tx_iovlen = 1;
req->tx_totallen = size;
req->tx_type = *(u_int16_t*)server->packet;
result = ncp_add_request(server, req);
if (result < 0)
goto out;
if (wait_event_interruptible(req->wq, req->status == RQ_DONE)) {
ncp_abort_request(server, req, -EINTR);
result = -EINTR;
goto out;
}
result = req->result;
out:
ncp_req_put(req);
return result;
}
/*
* We need the server to be locked here, so check!
*/
static int ncp_do_request(struct ncp_server *server, int size,
void* reply, int max_reply_size)
{
int result;
if (server->lock == 0) {
printk(KERN_ERR "ncpfs: Server not locked!\n");
return -EIO;
}
if (!ncp_conn_valid(server)) {
return -EIO;
}
{
sigset_t old_set;
unsigned long mask, flags;
spin_lock_irqsave(&current->sighand->siglock, flags);
old_set = current->blocked;
if (current->flags & PF_EXITING)
mask = 0;
else
mask = sigmask(SIGKILL);
if (server->m.flags & NCP_MOUNT_INTR) {
/* FIXME: This doesn't seem right at all. So, like,
we can't handle SIGINT and get whatever to stop?
What if we've blocked it ourselves? What about
alarms? Why, in fact, are we mucking with the
sigmask at all? -- r~ */
if (current->sighand->action[SIGINT - 1].sa.sa_handler == SIG_DFL)
mask |= sigmask(SIGINT);
if (current->sighand->action[SIGQUIT - 1].sa.sa_handler == SIG_DFL)
mask |= sigmask(SIGQUIT);
}
siginitsetinv(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irqrestore(&current->sighand->siglock, flags);
result = do_ncp_rpc_call(server, size, reply, max_reply_size);
spin_lock_irqsave(&current->sighand->siglock, flags);
current->blocked = old_set;
recalc_sigpending();
spin_unlock_irqrestore(&current->sighand->siglock, flags);
}
DDPRINTK("do_ncp_rpc_call returned %d\n", result);
return result;
}
/* ncp_do_request assures that at least a complete reply header is
* received. It assumes that server->current_size contains the ncp
* request size
*/
int ncp_request2(struct ncp_server *server, int function,
void* rpl, int size)
{
struct ncp_request_header *h;
struct ncp_reply_header* reply = rpl;
int result;
h = (struct ncp_request_header *) (server->packet);
if (server->has_subfunction != 0) {
*(__u16 *) & (h->data[0]) = htons(server->current_size - sizeof(*h) - 2);
}
h->type = NCP_REQUEST;
/*
* The server shouldn't know or care what task is making a
* request, so we always use the same task number.
*/
h->task = 2; /* (current->pid) & 0xff; */
h->function = function;
result = ncp_do_request(server, server->current_size, reply, size);
if (result < 0) {
DPRINTK("ncp_request_error: %d\n", result);
goto out;
}
server->completion = reply->completion_code;
server->conn_status = reply->connection_state;
server->reply_size = result;
server->ncp_reply_size = result - sizeof(struct ncp_reply_header);
result = reply->completion_code;
if (result != 0)
PPRINTK("ncp_request: completion code=%x\n", result);
out:
return result;
}
int ncp_connect(struct ncp_server *server)
{
struct ncp_request_header *h;
int result;
server->connection = 0xFFFF;
server->sequence = 255;
h = (struct ncp_request_header *) (server->packet);
h->type = NCP_ALLOC_SLOT_REQUEST;
h->task = 2; /* see above */
h->function = 0;
result = ncp_do_request(server, sizeof(*h), server->packet, server->packet_size);
if (result < 0)
goto out;
server->connection = h->conn_low + (h->conn_high * 256);
result = 0;
out:
return result;
}
int ncp_disconnect(struct ncp_server *server)
{
struct ncp_request_header *h;
h = (struct ncp_request_header *) (server->packet);
h->type = NCP_DEALLOC_SLOT_REQUEST;
h->task = 2; /* see above */
h->function = 0;
return ncp_do_request(server, sizeof(*h), server->packet, server->packet_size);
}
void ncp_lock_server(struct ncp_server *server)
{
mutex_lock(&server->mutex);
if (server->lock)
printk(KERN_WARNING "ncp_lock_server: was locked!\n");
server->lock = 1;
}
void ncp_unlock_server(struct ncp_server *server)
{
if (!server->lock) {
printk(KERN_WARNING "ncp_unlock_server: was not locked!\n");
return;
}
server->lock = 0;
mutex_unlock(&server->mutex);
}