[PATCH v4 1/7] staging:lustre: move tcpip abstraction

James Simmons
2015-06-03T19:57:38Z

Rename libcfs/linux/linux-tcpip.c to lnet/lnet/lib-socket.c

Signed-off-by: James Simmons <jsimmons@infradead.org>
---
drivers/staging/lustre/lnet/lnet/Makefile | 7 +-
drivers/staging/lustre/lnet/lnet/lib-socket.c | 624 ++++++++++++++++++++
drivers/staging/lustre/lustre/libcfs/Makefile | 1 -
.../lustre/lustre/libcfs/linux/linux-tcpip.c | 623 -------------------
4 files changed, 628 insertions(+), 627 deletions(-)
create mode 100644 drivers/staging/lustre/lnet/lnet/lib-socket.c
delete mode 100644 drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c

diff --git a/drivers/staging/lustre/lnet/lnet/Makefile b/drivers/staging/lustre/lnet/lnet/Makefile
index 336b8ea..52492fb 100644
--- a/drivers/staging/lustre/lnet/lnet/Makefile
+++ b/drivers/staging/lustre/lnet/lnet/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_LNET) += lnet.o

-lnet-y := api-ni.o config.o lib-me.o lib-msg.o lib-eq.o \
- lib-md.o lib-ptl.o lib-move.o module.o lo.o router.o \
- router_proc.o acceptor.o peer.o
+lnet-y := api-ni.o config.o \
+ lib-me.o lib-msg.o lib-eq.o lib-md.o lib-ptl.o \
+ lib-socket.o lib-move.o module.o lo.o \
+ router.o router_proc.o acceptor.o peer.o
diff --git a/drivers/staging/lustre/lnet/lnet/lib-socket.c b/drivers/staging/lustre/lnet/lnet/lib-socket.c
new file mode 100644
index 0000000..7f80612
--- /dev/null
+++ b/drivers/staging/lustre/lnet/lnet/lib-socket.c
@@ -0,0 +1,624 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+#define DEBUG_SUBSYSTEM S_LNET
+
+#include "../../include/linux/libcfs/libcfs.h"
+#include "../../include/linux/lnet/lib-lnet.h"
+
+#include <linux/if.h>
+#include <linux/in.h>
+#include <linux/file.h>
+/* For sys_open & sys_close */
+#include <linux/syscalls.h>
+
+static int
+libcfs_sock_ioctl(int cmd, unsigned long arg)
+{
+ mm_segment_t oldmm = get_fs();
+ struct socket *sock;
+ int rc;
+ struct file *sock_filp;
+
+ rc = sock_create (PF_INET, SOCK_STREAM, 0, &sock);
+ if (rc != 0) {
+ CERROR ("Can't create socket: %d\n", rc);
+ return rc;
+ }
+
+ sock_filp = sock_alloc_file(sock, 0, NULL);
+ if (IS_ERR(sock_filp)) {
+ sock_release(sock);
+ rc = PTR_ERR(sock_filp);
+ goto out;
+ }
+
+ set_fs(KERNEL_DS);
+ if (sock_filp->f_op->unlocked_ioctl)
+ rc = sock_filp->f_op->unlocked_ioctl(sock_filp, cmd, arg);
+ set_fs(oldmm);
+
+ fput(sock_filp);
+out:
+ return rc;
+}
+
+int
+libcfs_ipif_query (char *name, int *up, __u32 *ip, __u32 *mask)
+{
+ struct ifreq ifr;
+ int nob;
+ int rc;
+ __u32 val;
+
+ nob = strnlen(name, IFNAMSIZ);
+ if (nob == IFNAMSIZ) {
+ CERROR("Interface name %s too long\n", name);
+ return -EINVAL;
+ }
+
+ CLASSERT (sizeof(ifr.ifr_name) >= IFNAMSIZ);
+
+ strcpy(ifr.ifr_name, name);
+ rc = libcfs_sock_ioctl(SIOCGIFFLAGS, (unsigned long)&ifr);
+
+ if (rc != 0) {
+ CERROR("Can't get flags for interface %s\n", name);
+ return rc;
+ }
+
+ if ((ifr.ifr_flags & IFF_UP) == 0) {
+ CDEBUG(D_NET, "Interface %s down\n", name);
+ *up = 0;
+ *ip = *mask = 0;
+ return 0;
+ }
+
+ *up = 1;
+
+ strcpy(ifr.ifr_name, name);
+ ifr.ifr_addr.sa_family = AF_INET;
+ rc = libcfs_sock_ioctl(SIOCGIFADDR, (unsigned long)&ifr);
+
+ if (rc != 0) {
+ CERROR("Can't get IP address for interface %s\n", name);
+ return rc;
+ }
+
+ val = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
+ *ip = ntohl(val);
+
+ strcpy(ifr.ifr_name, name);
+ ifr.ifr_addr.sa_family = AF_INET;
+ rc = libcfs_sock_ioctl(SIOCGIFNETMASK, (unsigned long)&ifr);
+
+ if (rc != 0) {
+ CERROR("Can't get netmask for interface %s\n", name);
+ return rc;
+ }
+
+ val = ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr;
+ *mask = ntohl(val);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(libcfs_ipif_query);
+
+int
+libcfs_ipif_enumerate (char ***namesp)
+{
+ /* Allocate and fill in 'names', returning # interfaces/error */
+ char **names;
+ int toobig;
+ int nalloc;
+ int nfound;
+ struct ifreq *ifr;
+ struct ifconf ifc;
+ int rc;
+ int nob;
+ int i;
+
+
+ nalloc = 16; /* first guess at max interfaces */
+ toobig = 0;
+ for (;;) {
+ if (nalloc * sizeof(*ifr) > PAGE_CACHE_SIZE) {
+ toobig = 1;
+ nalloc = PAGE_CACHE_SIZE/sizeof(*ifr);
+ CWARN("Too many interfaces: only enumerating first %d\n",
+ nalloc);
+ }
+
+ LIBCFS_ALLOC(ifr, nalloc * sizeof(*ifr));
+ if (ifr == NULL) {
+ CERROR ("ENOMEM enumerating up to %d interfaces\n", nalloc);
+ rc = -ENOMEM;
+ goto out0;
+ }
+
+ ifc.ifc_buf = (char *)ifr;
+ ifc.ifc_len = nalloc * sizeof(*ifr);
+
+ rc = libcfs_sock_ioctl(SIOCGIFCONF, (unsigned long)&ifc);
+
+ if (rc < 0) {
+ CERROR ("Error %d enumerating interfaces\n", rc);
+ goto out1;
+ }
+
+ LASSERT (rc == 0);
+
+ nfound = ifc.ifc_len/sizeof(*ifr);
+ LASSERT (nfound <= nalloc);
+
+ if (nfound < nalloc || toobig)
+ break;
+
+ LIBCFS_FREE(ifr, nalloc * sizeof(*ifr));
+ nalloc *= 2;
+ }
+
+ if (nfound == 0)
+ goto out1;
+
+ LIBCFS_ALLOC(names, nfound * sizeof(*names));
+ if (names == NULL) {
+ rc = -ENOMEM;
+ goto out1;
+ }
+
+ for (i = 0; i < nfound; i++) {
+
+ nob = strnlen (ifr[i].ifr_name, IFNAMSIZ);
+ if (nob == IFNAMSIZ) {
+ /* no space for terminating NULL */
+ CERROR("interface name %.*s too long (%d max)\n",
+ nob, ifr[i].ifr_name, IFNAMSIZ);
+ rc = -ENAMETOOLONG;
+ goto out2;
+ }
+
+ LIBCFS_ALLOC(names[i], IFNAMSIZ);
+ if (names[i] == NULL) {
+ rc = -ENOMEM;
+ goto out2;
+ }
+
+ memcpy(names[i], ifr[i].ifr_name, nob);
+ names[i][nob] = 0;
+ }
+
+ *namesp = names;
+ rc = nfound;
+
+ out2:
+ if (rc < 0)
+ libcfs_ipif_free_enumeration(names, nfound);
+ out1:
+ LIBCFS_FREE(ifr, nalloc * sizeof(*ifr));
+ out0:
+ return rc;
+}
+
+EXPORT_SYMBOL(libcfs_ipif_enumerate);
+
+void
+libcfs_ipif_free_enumeration (char **names, int n)
+{
+ int i;
+
+ LASSERT (n > 0);
+
+ for (i = 0; i < n && names[i] != NULL; i++)
+ LIBCFS_FREE(names[i], IFNAMSIZ);
+
+ LIBCFS_FREE(names, n * sizeof(*names));
+}
+
+EXPORT_SYMBOL(libcfs_ipif_free_enumeration);
+
+int
+libcfs_sock_write (struct socket *sock, void *buffer, int nob, int timeout)
+{
+ int rc;
+ long ticks = timeout * HZ;
+ unsigned long then;
+ struct timeval tv;
+
+ LASSERT (nob > 0);
+ /* Caller may pass a zero timeout if she thinks the socket buffer is
+ * empty enough to take the whole message immediately */
+
+ for (;;) {
+ struct kvec iov = {
+ .iov_base = buffer,
+ .iov_len = nob
+ };
+ struct msghdr msg = {
+ .msg_flags = (timeout == 0) ? MSG_DONTWAIT : 0
+ };
+
+ if (timeout != 0) {
+ /* Set send timeout to remaining time */
+ tv = (struct timeval) {
+ .tv_sec = ticks / HZ,
+ .tv_usec = ((ticks % HZ) * 1000000) / HZ
+ };
+ rc = kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO,
+ (char *)&tv, sizeof(tv));
+ if (rc != 0) {
+ CERROR("Can't set socket send timeout %ld.%06d: %d\n",
+ (long)tv.tv_sec, (int)tv.tv_usec, rc);
+ return rc;
+ }
+ }
+
+ then = jiffies;
+ rc = kernel_sendmsg(sock, &msg, &iov, 1, nob);
+ ticks -= jiffies - then;
+
+ if (rc == nob)
+ return 0;
+
+ if (rc < 0)
+ return rc;
+
+ if (rc == 0) {
+ CERROR ("Unexpected zero rc\n");
+ return -ECONNABORTED;
+ }
+
+ if (ticks <= 0)
+ return -EAGAIN;
+
+ buffer = ((char *)buffer) + rc;
+ nob -= rc;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(libcfs_sock_write);
+
+int
+libcfs_sock_read (struct socket *sock, void *buffer, int nob, int timeout)
+{
+ int rc;
+ long ticks = timeout * HZ;
+ unsigned long then;
+ struct timeval tv;
+
+ LASSERT (nob > 0);
+ LASSERT (ticks > 0);
+
+ for (;;) {
+ struct kvec iov = {
+ .iov_base = buffer,
+ .iov_len = nob
+ };
+ struct msghdr msg = {
+ .msg_flags = 0
+ };
+
+ /* Set receive timeout to remaining time */
+ tv = (struct timeval) {
+ .tv_sec = ticks / HZ,
+ .tv_usec = ((ticks % HZ) * 1000000) / HZ
+ };
+ rc = kernel_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
+ (char *)&tv, sizeof(tv));
+ if (rc != 0) {
+ CERROR("Can't set socket recv timeout %ld.%06d: %d\n",
+ (long)tv.tv_sec, (int)tv.tv_usec, rc);
+ return rc;
+ }
+
+ then = jiffies;
+ rc = kernel_recvmsg(sock, &msg, &iov, 1, nob, 0);
+ ticks -= jiffies - then;
+
+ if (rc < 0)
+ return rc;
+
+ if (rc == 0)
+ return -ECONNRESET;
+
+ buffer = ((char *)buffer) + rc;
+ nob -= rc;
+
+ if (nob == 0)
+ return 0;
+
+ if (ticks <= 0)
+ return -ETIMEDOUT;
+ }
+}
+
+EXPORT_SYMBOL(libcfs_sock_read);
+
+static int
+libcfs_sock_create (struct socket **sockp, int *fatal,
+ __u32 local_ip, int local_port)
+{
+ struct sockaddr_in locaddr;
+ struct socket *sock;
+ int rc;
+ int option;
+
+ /* All errors are fatal except bind failure if the port is in use */
+ *fatal = 1;
+
+ rc = sock_create (PF_INET, SOCK_STREAM, 0, &sock);
+ *sockp = sock;
+ if (rc != 0) {
+ CERROR ("Can't create socket: %d\n", rc);
+ return rc;
+ }
+
+ option = 1;
+ rc = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
+ (char *)&option, sizeof (option));
+ if (rc != 0) {
+ CERROR("Can't set SO_REUSEADDR for socket: %d\n", rc);
+ goto failed;
+ }
+
+ if (local_ip != 0 || local_port != 0) {
+ memset(&locaddr, 0, sizeof(locaddr));
+ locaddr.sin_family = AF_INET;
+ locaddr.sin_port = htons(local_port);
+ locaddr.sin_addr.s_addr = (local_ip == 0) ?
+ INADDR_ANY : htonl(local_ip);
+
+ rc = sock->ops->bind(sock, (struct sockaddr *)&locaddr,
+ sizeof(locaddr));
+ if (rc == -EADDRINUSE) {
+ CDEBUG(D_NET, "Port %d already in use\n", local_port);
+ *fatal = 0;
+ goto failed;
+ }
+ if (rc != 0) {
+ CERROR("Error trying to bind to port %d: %d\n",
+ local_port, rc);
+ goto failed;
+ }
+ }
+
+ return 0;
+
+ failed:
+ sock_release(sock);
+ return rc;
+}
+
+int
+libcfs_sock_setbuf (struct socket *sock, int txbufsize, int rxbufsize)
+{
+ int option;
+ int rc;
+
+ if (txbufsize != 0) {
+ option = txbufsize;
+ rc = kernel_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
+ (char *)&option, sizeof (option));
+ if (rc != 0) {
+ CERROR ("Can't set send buffer %d: %d\n",
+ option, rc);
+ return rc;
+ }
+ }
+
+ if (rxbufsize != 0) {
+ option = rxbufsize;
+ rc = kernel_setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
+ (char *)&option, sizeof (option));
+ if (rc != 0) {
+ CERROR ("Can't set receive buffer %d: %d\n",
+ option, rc);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(libcfs_sock_setbuf);
+
+int
+libcfs_sock_getaddr (struct socket *sock, int remote, __u32 *ip, int *port)
+{
+ struct sockaddr_in sin;
+ int len = sizeof (sin);
+ int rc;
+
+ rc = sock->ops->getname (sock, (struct sockaddr *)&sin, &len,
+ remote ? 2 : 0);
+ if (rc != 0) {
+ CERROR ("Error %d getting sock %s IP/port\n",
+ rc, remote ? "peer" : "local");
+ return rc;
+ }
+
+ if (ip != NULL)
+ *ip = ntohl (sin.sin_addr.s_addr);
+
+ if (port != NULL)
+ *port = ntohs (sin.sin_port);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(libcfs_sock_getaddr);
+
+int
+libcfs_sock_getbuf (struct socket *sock, int *txbufsize, int *rxbufsize)
+{
+
+ if (txbufsize != NULL) {
+ *txbufsize = sock->sk->sk_sndbuf;
+ }
+
+ if (rxbufsize != NULL) {
+ *rxbufsize = sock->sk->sk_rcvbuf;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(libcfs_sock_getbuf);
+
+int
+libcfs_sock_listen (struct socket **sockp,
+ __u32 local_ip, int local_port, int backlog)
+{
+ int fatal;
+ int rc;
+
+ rc = libcfs_sock_create(sockp, &fatal, local_ip, local_port);
+ if (rc != 0) {
+ if (!fatal)
+ CERROR("Can't create socket: port %d already in use\n",
+ local_port);
+ return rc;
+ }
+
+ rc = (*sockp)->ops->listen(*sockp, backlog);
+ if (rc == 0)
+ return 0;
+
+ CERROR("Can't set listen backlog %d: %d\n", backlog, rc);
+ sock_release(*sockp);
+ return rc;
+}
+
+EXPORT_SYMBOL(libcfs_sock_listen);
+
+int
+libcfs_sock_accept (struct socket **newsockp, struct socket *sock)
+{
+ wait_queue_t wait;
+ struct socket *newsock;
+ int rc;
+
+ init_waitqueue_entry(&wait, current);
+
+ /* XXX this should add a ref to sock->ops->owner, if
+ * TCP could be a module */
+ rc = sock_create_lite(PF_PACKET, sock->type, IPPROTO_TCP, &newsock);
+ if (rc) {
+ CERROR("Can't allocate socket\n");
+ return rc;
+ }
+
+ newsock->ops = sock->ops;
+
+ rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
+ if (rc == -EAGAIN) {
+ /* Nothing ready, so wait for activity */
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(sk_sleep(sock->sk), &wait);
+ schedule();
+ remove_wait_queue(sk_sleep(sock->sk), &wait);
+ set_current_state(TASK_RUNNING);
+ rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
+ }
+
+ if (rc != 0)
+ goto failed;
+
+ *newsockp = newsock;
+ return 0;
+
+ failed:
+ sock_release(newsock);
+ return rc;
+}
+
+EXPORT_SYMBOL(libcfs_sock_accept);
+
+void
+libcfs_sock_abort_accept (struct socket *sock)
+{
+ wake_up_all(sk_sleep(sock->sk));
+}
+
+EXPORT_SYMBOL(libcfs_sock_abort_accept);
+
+int
+libcfs_sock_connect (struct socket **sockp, int *fatal,
+ __u32 local_ip, int local_port,
+ __u32 peer_ip, int peer_port)
+{
+ struct sockaddr_in srvaddr;
+ int rc;
+
+ rc = libcfs_sock_create(sockp, fatal, local_ip, local_port);
+ if (rc != 0)
+ return rc;
+
+ memset (&srvaddr, 0, sizeof (srvaddr));
+ srvaddr.sin_family = AF_INET;
+ srvaddr.sin_port = htons(peer_port);
+ srvaddr.sin_addr.s_addr = htonl(peer_ip);
+
+ rc = (*sockp)->ops->connect(*sockp,
+ (struct sockaddr *)&srvaddr, sizeof(srvaddr),
+ 0);
+ if (rc == 0)
+ return 0;
+
+ /* EADDRNOTAVAIL probably means we're already connected to the same
+ * peer/port on the same local port on a differently typed
+ * connection. Let our caller retry with a different local
+ * port... */
+ *fatal = !(rc == -EADDRNOTAVAIL);
+
+ CDEBUG_LIMIT(*fatal ? D_NETERROR : D_NET,
+ "Error %d connecting %pI4h/%d -> %pI4h/%d\n", rc,
+ &local_ip, local_port, &peer_ip, peer_port);
+
+ sock_release(*sockp);
+ return rc;
+}
+
+EXPORT_SYMBOL(libcfs_sock_connect);
+
+void
+libcfs_sock_release (struct socket *sock)
+{
+ sock_release(sock);
+}
+
+EXPORT_SYMBOL(libcfs_sock_release);
diff --git a/drivers/staging/lustre/lustre/libcfs/Makefile b/drivers/staging/lustre/lustre/libcfs/Makefile
index fabdd3e..ec98f44 100644
--- a/drivers/staging/lustre/lustre/libcfs/Makefile
+++ b/drivers/staging/lustre/lustre/libcfs/Makefile
@@ -2,7 +2,6 @@ obj-$(CONFIG_LUSTRE_FS) += libcfs.o

libcfs-linux-objs := linux-tracefile.o linux-debug.o
libcfs-linux-objs += linux-prim.o linux-cpu.o
-libcfs-linux-objs += linux-tcpip.o
libcfs-linux-objs += linux-curproc.o
libcfs-linux-objs += linux-module.o
libcfs-linux-objs += linux-crypto.o
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c
deleted file mode 100644
index f2462e7..0000000
--- a/drivers/staging/lustre/lustre/libcfs/linux/linux-tcpip.c
+++ /dev/null
@@ -1,623 +0,0 @@
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-#define DEBUG_SUBSYSTEM S_LNET
-
-#include "../../../include/linux/libcfs/libcfs.h"
-
-#include <linux/if.h>
-#include <linux/in.h>
-#include <linux/file.h>
-/* For sys_open & sys_close */
-#include <linux/syscalls.h>
-
-static int
-libcfs_sock_ioctl(int cmd, unsigned long arg)
-{
- mm_segment_t oldmm = get_fs();
- struct socket *sock;
- int rc;
- struct file *sock_filp;
-
- rc = sock_create (PF_INET, SOCK_STREAM, 0, &sock);
- if (rc != 0) {
- CERROR ("Can't create socket: %d\n", rc);
- return rc;
- }
-
- sock_filp = sock_alloc_file(sock, 0, NULL);
- if (IS_ERR(sock_filp)) {
- sock_release(sock);
- rc = PTR_ERR(sock_filp);
- goto out;
- }
-
- set_fs(KERNEL_DS);
- if (sock_filp->f_op->unlocked_ioctl)
- rc = sock_filp->f_op->unlocked_ioctl(sock_filp, cmd, arg);
- set_fs(oldmm);
-
- fput(sock_filp);
-out:
- return rc;
-}
-
-int
-libcfs_ipif_query (char *name, int *up, __u32 *ip, __u32 *mask)
-{
- struct ifreq ifr;
- int nob;
- int rc;
- __u32 val;
-
- nob = strnlen(name, IFNAMSIZ);
- if (nob == IFNAMSIZ) {
- CERROR("Interface name %s too long\n", name);
- return -EINVAL;
- }
-
- CLASSERT (sizeof(ifr.ifr_name) >= IFNAMSIZ);
-
- strcpy(ifr.ifr_name, name);
- rc = libcfs_sock_ioctl(SIOCGIFFLAGS, (unsigned long)&ifr);
-
- if (rc != 0) {
- CERROR("Can't get flags for interface %s\n", name);
- return rc;
- }
-
- if ((ifr.ifr_flags & IFF_UP) == 0) {
- CDEBUG(D_NET, "Interface %s down\n", name);
- *up = 0;
- *ip = *mask = 0;
- return 0;
- }
-
- *up = 1;
-
- strcpy(ifr.ifr_name, name);
- ifr.ifr_addr.sa_family = AF_INET;
- rc = libcfs_sock_ioctl(SIOCGIFADDR, (unsigned long)&ifr);
-
- if (rc != 0) {
- CERROR("Can't get IP address for interface %s\n", name);
- return rc;
- }
-
- val = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
- *ip = ntohl(val);
-
- strcpy(ifr.ifr_name, name);
- ifr.ifr_addr.sa_family = AF_INET;
- rc = libcfs_sock_ioctl(SIOCGIFNETMASK, (unsigned long)&ifr);
-
- if (rc != 0) {
- CERROR("Can't get netmask for interface %s\n", name);
- return rc;
- }
-
- val = ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr;
- *mask = ntohl(val);
-
- return 0;
-}
-
-EXPORT_SYMBOL(libcfs_ipif_query);
-
-int
-libcfs_ipif_enumerate (char ***namesp)
-{
- /* Allocate and fill in 'names', returning # interfaces/error */
- char **names;
- int toobig;
- int nalloc;
- int nfound;
- struct ifreq *ifr;
- struct ifconf ifc;
- int rc;
- int nob;
- int i;
-
-
- nalloc = 16; /* first guess at max interfaces */
- toobig = 0;
- for (;;) {
- if (nalloc * sizeof(*ifr) > PAGE_CACHE_SIZE) {
- toobig = 1;
- nalloc = PAGE_CACHE_SIZE/sizeof(*ifr);
- CWARN("Too many interfaces: only enumerating first %d\n",
- nalloc);
- }
-
- LIBCFS_ALLOC(ifr, nalloc * sizeof(*ifr));
- if (ifr == NULL) {
- CERROR ("ENOMEM enumerating up to %d interfaces\n", nalloc);
- rc = -ENOMEM;
- goto out0;
- }
-
- ifc.ifc_buf = (char *)ifr;
- ifc.ifc_len = nalloc * sizeof(*ifr);
-
- rc = libcfs_sock_ioctl(SIOCGIFCONF, (unsigned long)&ifc);
-
- if (rc < 0) {
- CERROR ("Error %d enumerating interfaces\n", rc);
- goto out1;
- }
-
- LASSERT (rc == 0);
-
- nfound = ifc.ifc_len/sizeof(*ifr);
- LASSERT (nfound <= nalloc);
-
- if (nfound < nalloc || toobig)
- break;
-
- LIBCFS_FREE(ifr, nalloc * sizeof(*ifr));
- nalloc *= 2;
- }
-
- if (nfound == 0)
- goto out1;
-
- LIBCFS_ALLOC(names, nfound * sizeof(*names));
- if (names == NULL) {
- rc = -ENOMEM;
- goto out1;
- }
-
- for (i = 0; i < nfound; i++) {
-
- nob = strnlen (ifr[i].ifr_name, IFNAMSIZ);
- if (nob == IFNAMSIZ) {
- /* no space for terminating NULL */
- CERROR("interface name %.*s too long (%d max)\n",
- nob, ifr[i].ifr_name, IFNAMSIZ);
- rc = -ENAMETOOLONG;
- goto out2;
- }
-
- LIBCFS_ALLOC(names[i], IFNAMSIZ);
- if (names[i] == NULL) {
- rc = -ENOMEM;
- goto out2;
- }
-
- memcpy(names[i], ifr[i].ifr_name, nob);
- names[i][nob] = 0;
- }
-
- *namesp = names;
- rc = nfound;
-
- out2:
- if (rc < 0)
- libcfs_ipif_free_enumeration(names, nfound);
- out1:
- LIBCFS_FREE(ifr, nalloc * sizeof(*ifr));
- out0:
- return rc;
-}
-
-EXPORT_SYMBOL(libcfs_ipif_enumerate);
-
-void
-libcfs_ipif_free_enumeration (char **names, int n)
-{
- int i;
-
- LASSERT (n > 0);
-
- for (i = 0; i < n && names[i] != NULL; i++)
- LIBCFS_FREE(names[i], IFNAMSIZ);
-
- LIBCFS_FREE(names, n * sizeof(*names));
-}
-
-EXPORT_SYMBOL(libcfs_ipif_free_enumeration);
-
-int
-libcfs_sock_write (struct socket *sock, void *buffer, int nob, int timeout)
-{
- int rc;
- long ticks = timeout * HZ;
- unsigned long then;
- struct timeval tv;
-
- LASSERT (nob > 0);
- /* Caller may pass a zero timeout if she thinks the socket buffer is
- * empty enough to take the whole message immediately */
-
- for (;;) {
- struct kvec iov = {
- .iov_base = buffer,
- .iov_len = nob
- };
- struct msghdr msg = {
- .msg_flags = (timeout == 0) ? MSG_DONTWAIT : 0
- };
-
- if (timeout != 0) {
- /* Set send timeout to remaining time */
- tv = (struct timeval) {
- .tv_sec = ticks / HZ,
- .tv_usec = ((ticks % HZ) * 1000000) / HZ
- };
- rc = kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO,
- (char *)&tv, sizeof(tv));
- if (rc != 0) {
- CERROR("Can't set socket send timeout %ld.%06d: %d\n",
- (long)tv.tv_sec, (int)tv.tv_usec, rc);
- return rc;
- }
- }
-
- then = jiffies;
- rc = kernel_sendmsg(sock, &msg, &iov, 1, nob);
- ticks -= jiffies - then;
-
- if (rc == nob)
- return 0;
-
- if (rc < 0)
- return rc;
-
- if (rc == 0) {
- CERROR ("Unexpected zero rc\n");
- return -ECONNABORTED;
- }
-
- if (ticks <= 0)
- return -EAGAIN;
-
- buffer = ((char *)buffer) + rc;
- nob -= rc;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(libcfs_sock_write);
-
-int
-libcfs_sock_read (struct socket *sock, void *buffer, int nob, int timeout)
-{
- int rc;
- long ticks = timeout * HZ;
- unsigned long then;
- struct timeval tv;
-
- LASSERT (nob > 0);
- LASSERT (ticks > 0);
-
- for (;;) {
- struct kvec iov = {
- .iov_base = buffer,
- .iov_len = nob
- };
- struct msghdr msg = {
- .msg_flags = 0
- };
-
- /* Set receive timeout to remaining time */
- tv = (struct timeval) {
- .tv_sec = ticks / HZ,
- .tv_usec = ((ticks % HZ) * 1000000) / HZ
- };
- rc = kernel_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
- (char *)&tv, sizeof(tv));
- if (rc != 0) {
- CERROR("Can't set socket recv timeout %ld.%06d: %d\n",
- (long)tv.tv_sec, (int)tv.tv_usec, rc);
- return rc;
- }
-
- then = jiffies;
- rc = kernel_recvmsg(sock, &msg, &iov, 1, nob, 0);
- ticks -= jiffies - then;
-
- if (rc < 0)
- return rc;
-
- if (rc == 0)
- return -ECONNRESET;
-
- buffer = ((char *)buffer) + rc;
- nob -= rc;
-
- if (nob == 0)
- return 0;
-
- if (ticks <= 0)
- return -ETIMEDOUT;
- }
-}
-
-EXPORT_SYMBOL(libcfs_sock_read);
-
-static int
-libcfs_sock_create (struct socket **sockp, int *fatal,
- __u32 local_ip, int local_port)
-{
- struct sockaddr_in locaddr;
- struct socket *sock;
- int rc;
- int option;
-
- /* All errors are fatal except bind failure if the port is in use */
- *fatal = 1;
-
- rc = sock_create (PF_INET, SOCK_STREAM, 0, &sock);
- *sockp = sock;
- if (rc != 0) {
- CERROR ("Can't create socket: %d\n", rc);
- return rc;
- }
-
- option = 1;
- rc = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
- (char *)&option, sizeof (option));
- if (rc != 0) {
- CERROR("Can't set SO_REUSEADDR for socket: %d\n", rc);
- goto failed;
- }
-
- if (local_ip != 0 || local_port != 0) {
- memset(&locaddr, 0, sizeof(locaddr));
- locaddr.sin_family = AF_INET;
- locaddr.sin_port = htons(local_port);
- locaddr.sin_addr.s_addr = (local_ip == 0) ?
- INADDR_ANY : htonl(local_ip);
-
- rc = sock->ops->bind(sock, (struct sockaddr *)&locaddr,
- sizeof(locaddr));
- if (rc == -EADDRINUSE) {
- CDEBUG(D_NET, "Port %d already in use\n", local_port);
- *fatal = 0;
- goto failed;
- }
- if (rc != 0) {
- CERROR("Error trying to bind to port %d: %d\n",
- local_port, rc);
- goto failed;
- }
- }
-
- return 0;
-
- failed:
- sock_release(sock);
- return rc;
-}
-
-int
-libcfs_sock_setbuf (struct socket *sock, int txbufsize, int rxbufsize)
-{
- int option;
- int rc;
-
- if (txbufsize != 0) {
- option = txbufsize;
- rc = kernel_setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
- (char *)&option, sizeof (option));
- if (rc != 0) {
- CERROR ("Can't set send buffer %d: %d\n",
- option, rc);
- return rc;
- }
- }
-
- if (rxbufsize != 0) {
- option = rxbufsize;
- rc = kernel_setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
- (char *)&option, sizeof (option));
- if (rc != 0) {
- CERROR ("Can't set receive buffer %d: %d\n",
- option, rc);
- return rc;
- }
- }
-
- return 0;
-}
-
-EXPORT_SYMBOL(libcfs_sock_setbuf);
-
-int
-libcfs_sock_getaddr (struct socket *sock, int remote, __u32 *ip, int *port)
-{
- struct sockaddr_in sin;
- int len = sizeof (sin);
- int rc;
-
- rc = sock->ops->getname (sock, (struct sockaddr *)&sin, &len,
- remote ? 2 : 0);
- if (rc != 0) {
- CERROR ("Error %d getting sock %s IP/port\n",
- rc, remote ? "peer" : "local");
- return rc;
- }
-
- if (ip != NULL)
- *ip = ntohl (sin.sin_addr.s_addr);
-
- if (port != NULL)
- *port = ntohs (sin.sin_port);
-
- return 0;
-}
-
-EXPORT_SYMBOL(libcfs_sock_getaddr);
-
-int
-libcfs_sock_getbuf (struct socket *sock, int *txbufsize, int *rxbufsize)
-{
-
- if (txbufsize != NULL) {
- *txbufsize = sock->sk->sk_sndbuf;
- }
-
- if (rxbufsize != NULL) {
- *rxbufsize = sock->sk->sk_rcvbuf;
- }
-
- return 0;
-}
-
-EXPORT_SYMBOL(libcfs_sock_getbuf);
-
-int
-libcfs_sock_listen (struct socket **sockp,
- __u32 local_ip, int local_port, int backlog)
-{
- int fatal;
- int rc;
-
- rc = libcfs_sock_create(sockp, &fatal, local_ip, local_port);
- if (rc != 0) {
- if (!fatal)
- CERROR("Can't create socket: port %d already in use\n",
- local_port);
- return rc;
- }
-
- rc = (*sockp)->ops->listen(*sockp, backlog);
- if (rc == 0)
- return 0;
-
- CERROR("Can't set listen backlog %d: %d\n", backlog, rc);
- sock_release(*sockp);
- return rc;
-}
-
-EXPORT_SYMBOL(libcfs_sock_listen);
-
-int
-libcfs_sock_accept (struct socket **newsockp, struct socket *sock)
-{
- wait_queue_t wait;
- struct socket *newsock;
- int rc;
-
- init_waitqueue_entry(&wait, current);
-
- /* XXX this should add a ref to sock->ops->owner, if
- * TCP could be a module */
- rc = sock_create_lite(PF_PACKET, sock->type, IPPROTO_TCP, &newsock);
- if (rc) {
- CERROR("Can't allocate socket\n");
- return rc;
- }
-
- newsock->ops = sock->ops;
-
- rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
- if (rc == -EAGAIN) {
- /* Nothing ready, so wait for activity */
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(sk_sleep(sock->sk), &wait);
- schedule();
- remove_wait_queue(sk_sleep(sock->sk), &wait);
- set_current_state(TASK_RUNNING);
- rc = sock->ops->accept(sock, newsock, O_NONBLOCK);
- }
-
- if (rc != 0)
- goto failed;
-
- *newsockp = newsock;
- return 0;
-
- failed:
- sock_release(newsock);
- return rc;
-}
-
-EXPORT_SYMBOL(libcfs_sock_accept);
-
-void
-libcfs_sock_abort_accept (struct socket *sock)
-{
- wake_up_all(sk_sleep(sock->sk));
-}
-
-EXPORT_SYMBOL(libcfs_sock_abort_accept);
-
-int
-libcfs_sock_connect (struct socket **sockp, int *fatal,
- __u32 local_ip, int local_port,
- __u32 peer_ip, int peer_port)
-{
- struct sockaddr_in srvaddr;
- int rc;
-
- rc = libcfs_sock_create(sockp, fatal, local_ip, local_port);
- if (rc != 0)
- return rc;
-
- memset (&srvaddr, 0, sizeof (srvaddr));
- srvaddr.sin_family = AF_INET;
- srvaddr.sin_port = htons(peer_port);
- srvaddr.sin_addr.s_addr = htonl(peer_ip);
-
- rc = (*sockp)->ops->connect(*sockp,
- (struct sockaddr *)&srvaddr, sizeof(srvaddr),
- 0);
- if (rc == 0)
- return 0;
-
- /* EADDRNOTAVAIL probably means we're already connected to the same
- * peer/port on the same local port on a differently typed
- * connection. Let our caller retry with a different local
- * port... */
- *fatal = !(rc == -EADDRNOTAVAIL);
-
- CDEBUG_LIMIT(*fatal ? D_NETERROR : D_NET,
- "Error %d connecting %pI4h/%d -> %pI4h/%d\n", rc,
- &local_ip, local_port, &peer_ip, peer_port);
-
- sock_release(*sockp);
- return rc;
-}
-
-EXPORT_SYMBOL(libcfs_sock_connect);
-
-void
-libcfs_sock_release (struct socket *sock)
-{
- sock_release(sock);
-}
-
-EXPORT_SYMBOL(libcfs_sock_release);
--
1.7.1