17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * sppptun_mod.c - modload support for PPP multiplexing tunnel driver. 37c478bd9Sstevel@tonic-gate * 4*19397407SSherry Moore * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 57c478bd9Sstevel@tonic-gate * Use is subject to license terms. 67c478bd9Sstevel@tonic-gate */ 77c478bd9Sstevel@tonic-gate 87c478bd9Sstevel@tonic-gate 97c478bd9Sstevel@tonic-gate #include <sys/types.h> 107c478bd9Sstevel@tonic-gate #include <sys/param.h> 117c478bd9Sstevel@tonic-gate #include <sys/stat.h> 127c478bd9Sstevel@tonic-gate #include <sys/systm.h> 137c478bd9Sstevel@tonic-gate #include <sys/socket.h> 147c478bd9Sstevel@tonic-gate #include <sys/stream.h> 157c478bd9Sstevel@tonic-gate #include <sys/stropts.h> 167c478bd9Sstevel@tonic-gate #include <sys/time.h> 177c478bd9Sstevel@tonic-gate #include <sys/conf.h> 187c478bd9Sstevel@tonic-gate #include <sys/kstat.h> 197c478bd9Sstevel@tonic-gate #include <sys/sunddi.h> 207c478bd9Sstevel@tonic-gate #include <net/sppptun.h> 217c478bd9Sstevel@tonic-gate #include <netinet/in.h> 227c478bd9Sstevel@tonic-gate 237c478bd9Sstevel@tonic-gate #include "sppptun_mod.h" 247c478bd9Sstevel@tonic-gate 257c478bd9Sstevel@tonic-gate /* 267c478bd9Sstevel@tonic-gate * Descriptions for flags values in cb_flags field: 277c478bd9Sstevel@tonic-gate * 287c478bd9Sstevel@tonic-gate * D_MTQPAIR: 297c478bd9Sstevel@tonic-gate * An inner perimeter that spans the queue pair. 307c478bd9Sstevel@tonic-gate * D_MTOUTPERIM: 317c478bd9Sstevel@tonic-gate * An outer perimeter that spans over all queues in the module. 327c478bd9Sstevel@tonic-gate * D_MTOCEXCL: 337c478bd9Sstevel@tonic-gate * Open & close procedures are entered exclusively at outer perimeter. 347c478bd9Sstevel@tonic-gate * D_MTPUTSHARED: 357c478bd9Sstevel@tonic-gate * Entry to put procedures are done with SHARED (reader) acess 367c478bd9Sstevel@tonic-gate * and not EXCLUSIVE (writer) access. 377c478bd9Sstevel@tonic-gate * 387c478bd9Sstevel@tonic-gate * Therefore: 397c478bd9Sstevel@tonic-gate * 407c478bd9Sstevel@tonic-gate * 1. Open and close procedures are entered with EXCLUSIVE (writer) 417c478bd9Sstevel@tonic-gate * access at the inner perimeter, and with EXCLUSIVE (writer) access at 427c478bd9Sstevel@tonic-gate * the outer perimeter. 437c478bd9Sstevel@tonic-gate * 447c478bd9Sstevel@tonic-gate * 2. Put procedures are entered with SHARED (reader) access at the inner 457c478bd9Sstevel@tonic-gate * perimeter, and with SHARED (reader) access at the outer perimeter. 467c478bd9Sstevel@tonic-gate * 477c478bd9Sstevel@tonic-gate * 3. Service procedures are entered with EXCLUSIVE (writer) access at 487c478bd9Sstevel@tonic-gate * the inner perimeter, and with SHARED (reader) access at the 497c478bd9Sstevel@tonic-gate * outer perimeter. 507c478bd9Sstevel@tonic-gate * 517c478bd9Sstevel@tonic-gate * Do not attempt to modify these flags unless the entire corresponding 527c478bd9Sstevel@tonic-gate * driver code is changed to accomodate the newly represented MT-STREAMS 537c478bd9Sstevel@tonic-gate * flags. Doing so without making proper modifications to the driver code 547c478bd9Sstevel@tonic-gate * will severely impact the intended driver behavior, and thus may affect 557c478bd9Sstevel@tonic-gate * the system's stability and performance. 567c478bd9Sstevel@tonic-gate */ 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate static int tun_attach(dev_info_t *, ddi_attach_cmd_t); 597c478bd9Sstevel@tonic-gate static int tun_detach(dev_info_t *, ddi_detach_cmd_t); 607c478bd9Sstevel@tonic-gate static int tun_info(dev_info_t *, ddi_info_cmd_t, void *, void **); 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate static dev_info_t *tun_dev_info; 637c478bd9Sstevel@tonic-gate 647c478bd9Sstevel@tonic-gate DDI_DEFINE_STREAM_OPS(sppptun_ops, \ 657c478bd9Sstevel@tonic-gate nulldev, nulldev, \ 667c478bd9Sstevel@tonic-gate tun_attach, tun_detach, nodev, tun_info, \ 677c478bd9Sstevel@tonic-gate D_NEW | D_MP | D_MTQPAIR | D_MTOUTPERIM | D_MTOCEXCL | D_MTPUTSHARED, \ 68*19397407SSherry Moore &sppptun_tab, ddi_quiesce_not_supported); 697c478bd9Sstevel@tonic-gate 707c478bd9Sstevel@tonic-gate /* 717c478bd9Sstevel@tonic-gate * This is the loadable module wrapper. 727c478bd9Sstevel@tonic-gate */ 737c478bd9Sstevel@tonic-gate #include <sys/modctl.h> 747c478bd9Sstevel@tonic-gate 757c478bd9Sstevel@tonic-gate /* 767c478bd9Sstevel@tonic-gate * Module linkage information for the kernel. 777c478bd9Sstevel@tonic-gate */ 787c478bd9Sstevel@tonic-gate static struct fmodsw sppptun_fmodsw = { 797c478bd9Sstevel@tonic-gate PPP_TUN_NAME, 807c478bd9Sstevel@tonic-gate &sppptun_tab, 817c478bd9Sstevel@tonic-gate D_NEW | D_MP | D_MTQPAIR | D_MTOUTPERIM | D_MTOCEXCL | D_MTPUTSHARED 827c478bd9Sstevel@tonic-gate }; 837c478bd9Sstevel@tonic-gate 847c478bd9Sstevel@tonic-gate static struct modldrv modldrv = { 857c478bd9Sstevel@tonic-gate &mod_driverops, 867c478bd9Sstevel@tonic-gate (char *)sppptun_driver_description, 877c478bd9Sstevel@tonic-gate &sppptun_ops 887c478bd9Sstevel@tonic-gate }; 897c478bd9Sstevel@tonic-gate 907c478bd9Sstevel@tonic-gate static struct modlstrmod modlstrmod = { 917c478bd9Sstevel@tonic-gate &mod_strmodops, 927c478bd9Sstevel@tonic-gate (char *)sppptun_module_description, 937c478bd9Sstevel@tonic-gate &sppptun_fmodsw 947c478bd9Sstevel@tonic-gate }; 957c478bd9Sstevel@tonic-gate 967c478bd9Sstevel@tonic-gate static struct modlinkage modlinkage = { 977c478bd9Sstevel@tonic-gate MODREV_1, 987c478bd9Sstevel@tonic-gate (void *)&modlstrmod, 997c478bd9Sstevel@tonic-gate (void *)&modldrv, 1007c478bd9Sstevel@tonic-gate NULL 1017c478bd9Sstevel@tonic-gate }; 1027c478bd9Sstevel@tonic-gate 1037c478bd9Sstevel@tonic-gate int 1047c478bd9Sstevel@tonic-gate _init(void) 1057c478bd9Sstevel@tonic-gate { 1067c478bd9Sstevel@tonic-gate int retv; 1077c478bd9Sstevel@tonic-gate 1087c478bd9Sstevel@tonic-gate sppptun_init(); 109002c70ffScarlsonj if ((retv = mod_install(&modlinkage)) == 0) 1107c478bd9Sstevel@tonic-gate sppptun_tcl_init(); 1117c478bd9Sstevel@tonic-gate return (retv); 1127c478bd9Sstevel@tonic-gate } 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate int 1157c478bd9Sstevel@tonic-gate _fini(void) 1167c478bd9Sstevel@tonic-gate { 1177c478bd9Sstevel@tonic-gate int retv; 1187c478bd9Sstevel@tonic-gate 1197c478bd9Sstevel@tonic-gate if ((retv = sppptun_tcl_fintest()) != 0) 1207c478bd9Sstevel@tonic-gate return (retv); 1217c478bd9Sstevel@tonic-gate retv = mod_remove(&modlinkage); 122002c70ffScarlsonj if (retv != 0) 1237c478bd9Sstevel@tonic-gate return (retv); 1247c478bd9Sstevel@tonic-gate sppptun_tcl_fini(); 1257c478bd9Sstevel@tonic-gate return (0); 1267c478bd9Sstevel@tonic-gate } 1277c478bd9Sstevel@tonic-gate 1287c478bd9Sstevel@tonic-gate int 1297c478bd9Sstevel@tonic-gate _info(struct modinfo *modinfop) 1307c478bd9Sstevel@tonic-gate { 131002c70ffScarlsonj return (mod_info(&modlinkage, modinfop)); 1327c478bd9Sstevel@tonic-gate } 1337c478bd9Sstevel@tonic-gate 1347c478bd9Sstevel@tonic-gate /* 1357c478bd9Sstevel@tonic-gate * tun_attach() 1367c478bd9Sstevel@tonic-gate * 1377c478bd9Sstevel@tonic-gate * Description: 1387c478bd9Sstevel@tonic-gate * Attach a PPP tunnel driver to the system. 1397c478bd9Sstevel@tonic-gate */ 1407c478bd9Sstevel@tonic-gate static int 1417c478bd9Sstevel@tonic-gate tun_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 1427c478bd9Sstevel@tonic-gate { 143002c70ffScarlsonj if (cmd != DDI_ATTACH) 1447c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 1457c478bd9Sstevel@tonic-gate if (ddi_create_minor_node(dip, PPP_TUN_NAME, S_IFCHR, 0, DDI_PSEUDO, 1467c478bd9Sstevel@tonic-gate CLONE_DEV) == DDI_FAILURE) { 1477c478bd9Sstevel@tonic-gate ddi_remove_minor_node(dip, NULL); 1487c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 1497c478bd9Sstevel@tonic-gate } 1507c478bd9Sstevel@tonic-gate tun_dev_info = dip; 1517c478bd9Sstevel@tonic-gate return (DDI_SUCCESS); 1527c478bd9Sstevel@tonic-gate } 1537c478bd9Sstevel@tonic-gate 1547c478bd9Sstevel@tonic-gate /* 1557c478bd9Sstevel@tonic-gate * tun_detach() 1567c478bd9Sstevel@tonic-gate * 1577c478bd9Sstevel@tonic-gate * Description: 1587c478bd9Sstevel@tonic-gate * Detach an interface to the system. 1597c478bd9Sstevel@tonic-gate */ 1607c478bd9Sstevel@tonic-gate static int 1617c478bd9Sstevel@tonic-gate tun_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 1627c478bd9Sstevel@tonic-gate { 163002c70ffScarlsonj if (cmd != DDI_DETACH) 1647c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 1657c478bd9Sstevel@tonic-gate tun_dev_info = NULL; 1667c478bd9Sstevel@tonic-gate ddi_remove_minor_node(dip, NULL); 1677c478bd9Sstevel@tonic-gate return (DDI_SUCCESS); 1687c478bd9Sstevel@tonic-gate } 1697c478bd9Sstevel@tonic-gate 1707c478bd9Sstevel@tonic-gate /* 1717c478bd9Sstevel@tonic-gate * tun_info() 1727c478bd9Sstevel@tonic-gate * 1737c478bd9Sstevel@tonic-gate * Description: 1747c478bd9Sstevel@tonic-gate * Translate "dev_t" to a pointer to the associated "dev_info_t". 1757c478bd9Sstevel@tonic-gate */ 1767c478bd9Sstevel@tonic-gate /* ARGSUSED */ 1777c478bd9Sstevel@tonic-gate static int 1787c478bd9Sstevel@tonic-gate tun_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, 1797c478bd9Sstevel@tonic-gate void **result) 1807c478bd9Sstevel@tonic-gate { 1817c478bd9Sstevel@tonic-gate int rc; 1827c478bd9Sstevel@tonic-gate 1837c478bd9Sstevel@tonic-gate switch (infocmd) { 1847c478bd9Sstevel@tonic-gate case DDI_INFO_DEVT2DEVINFO: 1857c478bd9Sstevel@tonic-gate if (tun_dev_info == NULL) { 1867c478bd9Sstevel@tonic-gate rc = DDI_FAILURE; 1877c478bd9Sstevel@tonic-gate } else { 1887c478bd9Sstevel@tonic-gate *result = (void *)tun_dev_info; 1897c478bd9Sstevel@tonic-gate rc = DDI_SUCCESS; 1907c478bd9Sstevel@tonic-gate } 1917c478bd9Sstevel@tonic-gate break; 1927c478bd9Sstevel@tonic-gate case DDI_INFO_DEVT2INSTANCE: 1937c478bd9Sstevel@tonic-gate *result = NULL; 1947c478bd9Sstevel@tonic-gate rc = DDI_SUCCESS; 1957c478bd9Sstevel@tonic-gate break; 1967c478bd9Sstevel@tonic-gate default: 1977c478bd9Sstevel@tonic-gate rc = DDI_FAILURE; 1987c478bd9Sstevel@tonic-gate break; 1997c478bd9Sstevel@tonic-gate } 2007c478bd9Sstevel@tonic-gate return (rc); 2017c478bd9Sstevel@tonic-gate } 202