netiucv: allow multiple interfaces to same peer
The NETIUCV device driver allows to connect a Linux guest on z/VM to another z/VM guest based on the z/VM communication facility IUCV. Multiple output paths to different guests are possible, as well as multiple input paths from different guests. With this feature, you can configure multiple point-to-point NETIUCV interfaces between your Linux on System z instance and another z/VM guest. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun
David S. Miller
parent
f78ac2bbb1
commit
08e3356cc2
1 changed files with 142 additions and 89 deletions
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@ -63,6 +63,7 @@
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/ebcdic.h>
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#include <net/iucv/iucv.h>
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#include "fsm.h"
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@ -75,7 +76,7 @@ MODULE_DESCRIPTION ("Linux for S/390 IUCV network driver");
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* Debug Facility stuff
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*/
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#define IUCV_DBF_SETUP_NAME "iucv_setup"
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#define IUCV_DBF_SETUP_LEN 32
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#define IUCV_DBF_SETUP_LEN 64
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#define IUCV_DBF_SETUP_PAGES 2
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#define IUCV_DBF_SETUP_NR_AREAS 1
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#define IUCV_DBF_SETUP_LEVEL 3
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@ -226,6 +227,7 @@ struct iucv_connection {
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struct net_device *netdev;
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struct connection_profile prof;
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char userid[9];
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char userdata[17];
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};
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/**
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@ -263,7 +265,7 @@ struct ll_header {
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};
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#define NETIUCV_HDRLEN (sizeof(struct ll_header))
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#define NETIUCV_BUFSIZE_MAX 32768
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#define NETIUCV_BUFSIZE_MAX 65537
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#define NETIUCV_BUFSIZE_DEFAULT NETIUCV_BUFSIZE_MAX
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#define NETIUCV_MTU_MAX (NETIUCV_BUFSIZE_MAX - NETIUCV_HDRLEN)
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#define NETIUCV_MTU_DEFAULT 9216
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@ -288,7 +290,12 @@ static inline int netiucv_test_and_set_busy(struct net_device *dev)
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return test_and_set_bit(0, &priv->tbusy);
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}
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static u8 iucvMagic[16] = {
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static u8 iucvMagic_ascii[16] = {
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0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x30, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20
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};
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static u8 iucvMagic_ebcdic[16] = {
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0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
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0xF0, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40
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};
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@ -301,18 +308,38 @@ static u8 iucvMagic[16] = {
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*
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* @returns The printable string (static data!!)
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*/
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static char *netiucv_printname(char *name)
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static char *netiucv_printname(char *name, int len)
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{
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static char tmp[9];
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static char tmp[17];
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char *p = tmp;
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memcpy(tmp, name, 8);
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tmp[8] = '\0';
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while (*p && (!isspace(*p)))
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memcpy(tmp, name, len);
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tmp[len] = '\0';
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while (*p && ((p - tmp) < len) && (!isspace(*p)))
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p++;
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*p = '\0';
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return tmp;
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}
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static char *netiucv_printuser(struct iucv_connection *conn)
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{
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static char tmp_uid[9];
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static char tmp_udat[17];
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static char buf[100];
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if (memcmp(conn->userdata, iucvMagic_ebcdic, 16)) {
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tmp_uid[8] = '\0';
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tmp_udat[16] = '\0';
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memcpy(tmp_uid, conn->userid, 8);
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memcpy(tmp_uid, netiucv_printname(tmp_uid, 8), 8);
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memcpy(tmp_udat, conn->userdata, 16);
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EBCASC(tmp_udat, 16);
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memcpy(tmp_udat, netiucv_printname(tmp_udat, 16), 16);
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sprintf(buf, "%s.%s", tmp_uid, tmp_udat);
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return buf;
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} else
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return netiucv_printname(conn->userid, 8);
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}
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/**
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* States of the interface statemachine.
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*/
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@ -563,15 +590,18 @@ static int netiucv_callback_connreq(struct iucv_path *path,
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{
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struct iucv_connection *conn = path->private;
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struct iucv_event ev;
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static char tmp_user[9];
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static char tmp_udat[17];
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int rc;
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if (memcmp(iucvMagic, ipuser, 16))
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/* ipuser must match iucvMagic. */
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return -EINVAL;
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rc = -EINVAL;
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memcpy(tmp_user, netiucv_printname(ipvmid, 8), 8);
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memcpy(tmp_udat, ipuser, 16);
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EBCASC(tmp_udat, 16);
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read_lock_bh(&iucv_connection_rwlock);
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list_for_each_entry(conn, &iucv_connection_list, list) {
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if (strncmp(ipvmid, conn->userid, 8))
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if (strncmp(ipvmid, conn->userid, 8) ||
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strncmp(ipuser, conn->userdata, 16))
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continue;
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/* Found a matching connection for this path. */
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conn->path = path;
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@ -580,6 +610,8 @@ static int netiucv_callback_connreq(struct iucv_path *path,
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fsm_event(conn->fsm, CONN_EVENT_CONN_REQ, &ev);
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rc = 0;
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}
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IUCV_DBF_TEXT_(setup, 2, "Connection requested for %s.%s\n",
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tmp_user, netiucv_printname(tmp_udat, 16));
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read_unlock_bh(&iucv_connection_rwlock);
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return rc;
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}
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@ -816,7 +848,7 @@ static void conn_action_connaccept(fsm_instance *fi, int event, void *arg)
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conn->path = path;
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path->msglim = NETIUCV_QUEUELEN_DEFAULT;
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path->flags = 0;
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rc = iucv_path_accept(path, &netiucv_handler, NULL, conn);
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rc = iucv_path_accept(path, &netiucv_handler, conn->userdata , conn);
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if (rc) {
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IUCV_DBF_TEXT_(setup, 2, "rc %d from iucv_accept", rc);
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return;
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@ -854,7 +886,7 @@ static void conn_action_conntimsev(fsm_instance *fi, int event, void *arg)
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IUCV_DBF_TEXT(trace, 3, __func__);
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fsm_deltimer(&conn->timer);
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iucv_path_sever(conn->path, NULL);
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iucv_path_sever(conn->path, conn->userdata);
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fsm_newstate(fi, CONN_STATE_STARTWAIT);
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}
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@ -867,9 +899,9 @@ static void conn_action_connsever(fsm_instance *fi, int event, void *arg)
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IUCV_DBF_TEXT(trace, 3, __func__);
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fsm_deltimer(&conn->timer);
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iucv_path_sever(conn->path, NULL);
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dev_info(privptr->dev, "The peer interface of the IUCV device"
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" has closed the connection\n");
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iucv_path_sever(conn->path, conn->userdata);
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dev_info(privptr->dev, "The peer z/VM guest %s has closed the "
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"connection\n", netiucv_printuser(conn));
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IUCV_DBF_TEXT(data, 2,
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"conn_action_connsever: Remote dropped connection\n");
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fsm_newstate(fi, CONN_STATE_STARTWAIT);
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@ -886,8 +918,6 @@ static void conn_action_start(fsm_instance *fi, int event, void *arg)
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IUCV_DBF_TEXT(trace, 3, __func__);
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fsm_newstate(fi, CONN_STATE_STARTWAIT);
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IUCV_DBF_TEXT_(setup, 2, "%s('%s'): connecting ...\n",
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netdev->name, conn->userid);
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/*
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* We must set the state before calling iucv_connect because the
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@ -897,8 +927,11 @@ static void conn_action_start(fsm_instance *fi, int event, void *arg)
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fsm_newstate(fi, CONN_STATE_SETUPWAIT);
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conn->path = iucv_path_alloc(NETIUCV_QUEUELEN_DEFAULT, 0, GFP_KERNEL);
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IUCV_DBF_TEXT_(setup, 2, "%s: connecting to %s ...\n",
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netdev->name, netiucv_printuser(conn));
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rc = iucv_path_connect(conn->path, &netiucv_handler, conn->userid,
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NULL, iucvMagic, conn);
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NULL, conn->userdata, conn);
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switch (rc) {
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case 0:
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netdev->tx_queue_len = conn->path->msglim;
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@ -908,13 +941,13 @@ static void conn_action_start(fsm_instance *fi, int event, void *arg)
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case 11:
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dev_warn(privptr->dev,
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"The IUCV device failed to connect to z/VM guest %s\n",
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netiucv_printname(conn->userid));
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netiucv_printname(conn->userid, 8));
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fsm_newstate(fi, CONN_STATE_STARTWAIT);
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break;
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case 12:
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dev_warn(privptr->dev,
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"The IUCV device failed to connect to the peer on z/VM"
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" guest %s\n", netiucv_printname(conn->userid));
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" guest %s\n", netiucv_printname(conn->userid, 8));
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fsm_newstate(fi, CONN_STATE_STARTWAIT);
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break;
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case 13:
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@ -927,7 +960,7 @@ static void conn_action_start(fsm_instance *fi, int event, void *arg)
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dev_err(privptr->dev,
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"z/VM guest %s has too many IUCV connections"
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" to connect with the IUCV device\n",
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netiucv_printname(conn->userid));
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netiucv_printname(conn->userid, 8));
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fsm_newstate(fi, CONN_STATE_CONNERR);
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break;
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case 15:
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@ -972,7 +1005,7 @@ static void conn_action_stop(fsm_instance *fi, int event, void *arg)
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netiucv_purge_skb_queue(&conn->collect_queue);
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if (conn->path) {
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IUCV_DBF_TEXT(trace, 5, "calling iucv_path_sever\n");
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iucv_path_sever(conn->path, iucvMagic);
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iucv_path_sever(conn->path, conn->userdata);
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kfree(conn->path);
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conn->path = NULL;
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}
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@ -1090,7 +1123,8 @@ dev_action_connup(fsm_instance *fi, int event, void *arg)
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fsm_newstate(fi, DEV_STATE_RUNNING);
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dev_info(privptr->dev,
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"The IUCV device has been connected"
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" successfully to %s\n", privptr->conn->userid);
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" successfully to %s\n",
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netiucv_printuser(privptr->conn));
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IUCV_DBF_TEXT(setup, 3,
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"connection is up and running\n");
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break;
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@ -1452,7 +1486,55 @@ static ssize_t user_show(struct device *dev, struct device_attribute *attr,
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struct netiucv_priv *priv = dev_get_drvdata(dev);
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IUCV_DBF_TEXT(trace, 5, __func__);
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return sprintf(buf, "%s\n", netiucv_printname(priv->conn->userid));
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return sprintf(buf, "%s\n", netiucv_printuser(priv->conn));
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}
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static int netiucv_check_user(const char *buf, size_t count, char *username,
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char *userdata)
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{
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const char *p;
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int i;
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p = strchr(buf, '.');
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if ((p && ((count > 26) ||
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((p - buf) > 8) ||
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(buf + count - p > 18))) ||
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(!p && (count > 9))) {
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IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n");
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return -EINVAL;
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}
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for (i = 0, p = buf; i < 8 && *p && *p != '.'; i++, p++) {
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if (isalnum(*p) || *p == '$') {
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username[i] = toupper(*p);
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continue;
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}
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if (*p == '\n')
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/* trailing lf, grr */
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break;
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IUCV_DBF_TEXT_(setup, 2,
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"conn_write: invalid character %02x\n", *p);
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return -EINVAL;
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}
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while (i < 8)
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username[i++] = ' ';
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username[8] = '\0';
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if (*p == '.') {
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p++;
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for (i = 0; i < 16 && *p; i++, p++) {
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if (*p == '\n')
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break;
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userdata[i] = toupper(*p);
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}
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while (i > 0 && i < 16)
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userdata[i++] = ' ';
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} else
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memcpy(userdata, iucvMagic_ascii, 16);
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userdata[16] = '\0';
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ASCEBC(userdata, 16);
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return 0;
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}
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static ssize_t user_write(struct device *dev, struct device_attribute *attr,
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@ -1460,36 +1542,15 @@ static ssize_t user_write(struct device *dev, struct device_attribute *attr,
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{
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struct netiucv_priv *priv = dev_get_drvdata(dev);
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struct net_device *ndev = priv->conn->netdev;
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char *p;
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char *tmp;
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char username[9];
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int i;
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char username[9];
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char userdata[17];
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int rc;
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struct iucv_connection *cp;
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IUCV_DBF_TEXT(trace, 3, __func__);
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if (count > 9) {
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IUCV_DBF_TEXT_(setup, 2,
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"%d is length of username\n", (int) count);
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return -EINVAL;
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}
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tmp = strsep((char **) &buf, "\n");
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for (i = 0, p = tmp; i < 8 && *p; i++, p++) {
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if (isalnum(*p) || (*p == '$')) {
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username[i]= toupper(*p);
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continue;
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}
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if (*p == '\n') {
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/* trailing lf, grr */
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break;
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}
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IUCV_DBF_TEXT_(setup, 2,
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"username: invalid character %c\n", *p);
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return -EINVAL;
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}
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while (i < 8)
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username[i++] = ' ';
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username[8] = '\0';
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rc = netiucv_check_user(buf, count, username, userdata);
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if (rc)
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return rc;
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if (memcmp(username, priv->conn->userid, 9) &&
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(ndev->flags & (IFF_UP | IFF_RUNNING))) {
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@ -1499,15 +1560,17 @@ static ssize_t user_write(struct device *dev, struct device_attribute *attr,
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}
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read_lock_bh(&iucv_connection_rwlock);
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list_for_each_entry(cp, &iucv_connection_list, list) {
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if (!strncmp(username, cp->userid, 9) && cp->netdev != ndev) {
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if (!strncmp(username, cp->userid, 9) &&
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!strncmp(userdata, cp->userdata, 17) && cp->netdev != ndev) {
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read_unlock_bh(&iucv_connection_rwlock);
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IUCV_DBF_TEXT_(setup, 2, "user_write: Connection "
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"to %s already exists\n", username);
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IUCV_DBF_TEXT_(setup, 2, "user_write: Connection to %s "
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"already exists\n", netiucv_printuser(cp));
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return -EEXIST;
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}
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}
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read_unlock_bh(&iucv_connection_rwlock);
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memcpy(priv->conn->userid, username, 9);
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memcpy(priv->conn->userdata, userdata, 17);
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return count;
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}
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@ -1537,7 +1600,8 @@ static ssize_t buffer_write (struct device *dev, struct device_attribute *attr,
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bs1 = simple_strtoul(buf, &e, 0);
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if (e && (!isspace(*e))) {
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IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %c\n", *e);
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IUCV_DBF_TEXT_(setup, 2, "buffer_write: invalid char %02x\n",
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*e);
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return -EINVAL;
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}
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if (bs1 > NETIUCV_BUFSIZE_MAX) {
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@ -1864,7 +1928,8 @@ static void netiucv_unregister_device(struct device *dev)
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* Add it to the list of netiucv connections;
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*/
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static struct iucv_connection *netiucv_new_connection(struct net_device *dev,
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char *username)
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char *username,
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char *userdata)
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{
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struct iucv_connection *conn;
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@ -1893,6 +1958,8 @@ static struct iucv_connection *netiucv_new_connection(struct net_device *dev,
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fsm_settimer(conn->fsm, &conn->timer);
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fsm_newstate(conn->fsm, CONN_STATE_INVALID);
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if (userdata)
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memcpy(conn->userdata, userdata, 17);
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if (username) {
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memcpy(conn->userid, username, 9);
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fsm_newstate(conn->fsm, CONN_STATE_STOPPED);
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@ -1919,6 +1986,7 @@ out:
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*/
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static void netiucv_remove_connection(struct iucv_connection *conn)
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{
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IUCV_DBF_TEXT(trace, 3, __func__);
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write_lock_bh(&iucv_connection_rwlock);
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list_del_init(&conn->list);
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@ -1926,7 +1994,7 @@ static void netiucv_remove_connection(struct iucv_connection *conn)
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fsm_deltimer(&conn->timer);
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netiucv_purge_skb_queue(&conn->collect_queue);
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if (conn->path) {
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iucv_path_sever(conn->path, iucvMagic);
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iucv_path_sever(conn->path, conn->userdata);
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kfree(conn->path);
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conn->path = NULL;
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}
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@ -1985,7 +2053,7 @@ static void netiucv_setup_netdevice(struct net_device *dev)
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/**
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* Allocate and initialize everything of a net device.
|
||||
*/
|
||||
static struct net_device *netiucv_init_netdevice(char *username)
|
||||
static struct net_device *netiucv_init_netdevice(char *username, char *userdata)
|
||||
{
|
||||
struct netiucv_priv *privptr;
|
||||
struct net_device *dev;
|
||||
|
|
@ -2004,7 +2072,7 @@ static struct net_device *netiucv_init_netdevice(char *username)
|
|||
if (!privptr->fsm)
|
||||
goto out_netdev;
|
||||
|
||||
privptr->conn = netiucv_new_connection(dev, username);
|
||||
privptr->conn = netiucv_new_connection(dev, username, userdata);
|
||||
if (!privptr->conn) {
|
||||
IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_new_connection\n");
|
||||
goto out_fsm;
|
||||
|
|
@ -2022,47 +2090,31 @@ out_netdev:
|
|||
static ssize_t conn_write(struct device_driver *drv,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
const char *p;
|
||||
char username[9];
|
||||
int i, rc;
|
||||
char userdata[17];
|
||||
int rc;
|
||||
struct net_device *dev;
|
||||
struct netiucv_priv *priv;
|
||||
struct iucv_connection *cp;
|
||||
|
||||
IUCV_DBF_TEXT(trace, 3, __func__);
|
||||
if (count>9) {
|
||||
IUCV_DBF_TEXT(setup, 2, "conn_write: too long\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
for (i = 0, p = buf; i < 8 && *p; i++, p++) {
|
||||
if (isalnum(*p) || *p == '$') {
|
||||
username[i] = toupper(*p);
|
||||
continue;
|
||||
}
|
||||
if (*p == '\n')
|
||||
/* trailing lf, grr */
|
||||
break;
|
||||
IUCV_DBF_TEXT_(setup, 2,
|
||||
"conn_write: invalid character %c\n", *p);
|
||||
return -EINVAL;
|
||||
}
|
||||
while (i < 8)
|
||||
username[i++] = ' ';
|
||||
username[8] = '\0';
|
||||
rc = netiucv_check_user(buf, count, username, userdata);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
read_lock_bh(&iucv_connection_rwlock);
|
||||
list_for_each_entry(cp, &iucv_connection_list, list) {
|
||||
if (!strncmp(username, cp->userid, 9)) {
|
||||
if (!strncmp(username, cp->userid, 9) &&
|
||||
!strncmp(userdata, cp->userdata, 17)) {
|
||||
read_unlock_bh(&iucv_connection_rwlock);
|
||||
IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection "
|
||||
"to %s already exists\n", username);
|
||||
IUCV_DBF_TEXT_(setup, 2, "conn_write: Connection to %s "
|
||||
"already exists\n", netiucv_printuser(cp));
|
||||
return -EEXIST;
|
||||
}
|
||||
}
|
||||
read_unlock_bh(&iucv_connection_rwlock);
|
||||
|
||||
dev = netiucv_init_netdevice(username);
|
||||
dev = netiucv_init_netdevice(username, userdata);
|
||||
if (!dev) {
|
||||
IUCV_DBF_TEXT(setup, 2, "NULL from netiucv_init_netdevice\n");
|
||||
return -ENODEV;
|
||||
|
|
@ -2083,8 +2135,9 @@ static ssize_t conn_write(struct device_driver *drv,
|
|||
if (rc)
|
||||
goto out_unreg;
|
||||
|
||||
dev_info(priv->dev, "The IUCV interface to %s has been"
|
||||
" established successfully\n", netiucv_printname(username));
|
||||
dev_info(priv->dev, "The IUCV interface to %s has been established "
|
||||
"successfully\n",
|
||||
netiucv_printuser(priv->conn));
|
||||
|
||||
return count;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue