1321b17ecSEdward Tomasz Napierala /*- 243ee6e9dSEdward Tomasz Napierala * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 343ee6e9dSEdward Tomasz Napierala * 4321b17ecSEdward Tomasz Napierala * Copyright (c) 2012 The FreeBSD Foundation 5321b17ecSEdward Tomasz Napierala * 6321b17ecSEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 7321b17ecSEdward Tomasz Napierala * from the FreeBSD Foundation. 8321b17ecSEdward Tomasz Napierala * 9321b17ecSEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 10321b17ecSEdward Tomasz Napierala * modification, are permitted provided that the following conditions 11321b17ecSEdward Tomasz Napierala * are met: 12321b17ecSEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 13321b17ecSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 14321b17ecSEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 15321b17ecSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 16321b17ecSEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 17321b17ecSEdward Tomasz Napierala * 18321b17ecSEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19321b17ecSEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20321b17ecSEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21321b17ecSEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22321b17ecSEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23321b17ecSEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24321b17ecSEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25321b17ecSEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26321b17ecSEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27321b17ecSEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28321b17ecSEdward Tomasz Napierala * SUCH DAMAGE. 29321b17ecSEdward Tomasz Napierala * 30321b17ecSEdward Tomasz Napierala */ 31321b17ecSEdward Tomasz Napierala 32321b17ecSEdward Tomasz Napierala /* 335aabcd7cSEdward Tomasz Napierala * Software implementation of iSCSI Common Layer kobj(9) interface. 34321b17ecSEdward Tomasz Napierala */ 35321b17ecSEdward Tomasz Napierala 36321b17ecSEdward Tomasz Napierala #include <sys/cdefs.h> 37321b17ecSEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 38321b17ecSEdward Tomasz Napierala 39321b17ecSEdward Tomasz Napierala #include <sys/param.h> 40321b17ecSEdward Tomasz Napierala #include <sys/capsicum.h> 41321b17ecSEdward Tomasz Napierala #include <sys/condvar.h> 42321b17ecSEdward Tomasz Napierala #include <sys/conf.h> 43f89d2072SXin LI #include <sys/gsb_crc32.h> 44321b17ecSEdward Tomasz Napierala #include <sys/file.h> 45321b17ecSEdward Tomasz Napierala #include <sys/kernel.h> 46321b17ecSEdward Tomasz Napierala #include <sys/kthread.h> 47321b17ecSEdward Tomasz Napierala #include <sys/lock.h> 48321b17ecSEdward Tomasz Napierala #include <sys/mbuf.h> 49321b17ecSEdward Tomasz Napierala #include <sys/mutex.h> 50321b17ecSEdward Tomasz Napierala #include <sys/module.h> 51321b17ecSEdward Tomasz Napierala #include <sys/protosw.h> 52321b17ecSEdward Tomasz Napierala #include <sys/socket.h> 53321b17ecSEdward Tomasz Napierala #include <sys/socketvar.h> 54321b17ecSEdward Tomasz Napierala #include <sys/sysctl.h> 55321b17ecSEdward Tomasz Napierala #include <sys/systm.h> 56321b17ecSEdward Tomasz Napierala #include <sys/sx.h> 57321b17ecSEdward Tomasz Napierala #include <sys/uio.h> 58321b17ecSEdward Tomasz Napierala #include <vm/uma.h> 59321b17ecSEdward Tomasz Napierala #include <netinet/in.h> 60321b17ecSEdward Tomasz Napierala #include <netinet/tcp.h> 61321b17ecSEdward Tomasz Napierala 62321b17ecSEdward Tomasz Napierala #include <dev/iscsi/icl.h> 63321b17ecSEdward Tomasz Napierala #include <dev/iscsi/iscsi_proto.h> 64321b17ecSEdward Tomasz Napierala #include <icl_conn_if.h> 65321b17ecSEdward Tomasz Napierala 669a4510acSAlexander Motin struct icl_soft_pdu { 679a4510acSAlexander Motin struct icl_pdu ip; 689a4510acSAlexander Motin 699a4510acSAlexander Motin /* soft specific stuff goes here. */ 709a4510acSAlexander Motin u_int ref_cnt; 719a4510acSAlexander Motin icl_pdu_cb cb; 729a4510acSAlexander Motin int error; 739a4510acSAlexander Motin }; 749a4510acSAlexander Motin 75*b75168edSAlexander Motin SYSCTL_NODE(_kern_icl, OID_AUTO, soft, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 76*b75168edSAlexander Motin "Software iSCSI"); 77321b17ecSEdward Tomasz Napierala static int coalesce = 1; 78*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, coalesce, CTLFLAG_RWTUN, 79321b17ecSEdward Tomasz Napierala &coalesce, 0, "Try to coalesce PDUs before sending"); 80*b75168edSAlexander Motin static int partial_receive_len = 256 * 1024; 81*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, partial_receive_len, CTLFLAG_RWTUN, 82321b17ecSEdward Tomasz Napierala &partial_receive_len, 0, "Minimum read size for partially received " 83321b17ecSEdward Tomasz Napierala "data segment"); 84*b75168edSAlexander Motin static int max_data_segment_length = 256 * 1024; 85*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, max_data_segment_length, CTLFLAG_RWTUN, 86*b75168edSAlexander Motin &max_data_segment_length, 0, "Maximum data segment length"); 87*b75168edSAlexander Motin static int first_burst_length = 1024 * 1024; 88*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, first_burst_length, CTLFLAG_RWTUN, 89*b75168edSAlexander Motin &first_burst_length, 0, "First burst length"); 90*b75168edSAlexander Motin static int max_burst_length = 1024 * 1024; 91*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, max_burst_length, CTLFLAG_RWTUN, 92*b75168edSAlexander Motin &max_burst_length, 0, "Maximum burst length"); 93*b75168edSAlexander Motin static int sendspace = 1536 * 1024; 94*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, sendspace, CTLFLAG_RWTUN, 95321b17ecSEdward Tomasz Napierala &sendspace, 0, "Default send socket buffer size"); 96*b75168edSAlexander Motin static int recvspace = 1536 * 1024; 97*b75168edSAlexander Motin SYSCTL_INT(_kern_icl_soft, OID_AUTO, recvspace, CTLFLAG_RWTUN, 98321b17ecSEdward Tomasz Napierala &recvspace, 0, "Default receive socket buffer size"); 99321b17ecSEdward Tomasz Napierala 100321b17ecSEdward Tomasz Napierala static MALLOC_DEFINE(M_ICL_SOFT, "icl_soft", "iSCSI software backend"); 1019a4510acSAlexander Motin static uma_zone_t icl_soft_pdu_zone; 102321b17ecSEdward Tomasz Napierala 103321b17ecSEdward Tomasz Napierala static volatile u_int icl_ncons; 104321b17ecSEdward Tomasz Napierala 105321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK(X) mtx_lock(X->ic_lock) 106321b17ecSEdward Tomasz Napierala #define ICL_CONN_UNLOCK(X) mtx_unlock(X->ic_lock) 107321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK_ASSERT(X) mtx_assert(X->ic_lock, MA_OWNED) 108321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK_ASSERT_NOT(X) mtx_assert(X->ic_lock, MA_NOTOWNED) 109321b17ecSEdward Tomasz Napierala 110321b17ecSEdward Tomasz Napierala STAILQ_HEAD(icl_pdu_stailq, icl_pdu); 111321b17ecSEdward Tomasz Napierala 112321b17ecSEdward Tomasz Napierala static icl_conn_new_pdu_t icl_soft_conn_new_pdu; 113321b17ecSEdward Tomasz Napierala static icl_conn_pdu_free_t icl_soft_conn_pdu_free; 114321b17ecSEdward Tomasz Napierala static icl_conn_pdu_data_segment_length_t 115321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length; 116321b17ecSEdward Tomasz Napierala static icl_conn_pdu_append_data_t icl_soft_conn_pdu_append_data; 117321b17ecSEdward Tomasz Napierala static icl_conn_pdu_get_data_t icl_soft_conn_pdu_get_data; 118321b17ecSEdward Tomasz Napierala static icl_conn_pdu_queue_t icl_soft_conn_pdu_queue; 1199a4510acSAlexander Motin static icl_conn_pdu_queue_cb_t icl_soft_conn_pdu_queue_cb; 120321b17ecSEdward Tomasz Napierala static icl_conn_handoff_t icl_soft_conn_handoff; 121321b17ecSEdward Tomasz Napierala static icl_conn_free_t icl_soft_conn_free; 122321b17ecSEdward Tomasz Napierala static icl_conn_close_t icl_soft_conn_close; 1237a03d007SEdward Tomasz Napierala static icl_conn_task_setup_t icl_soft_conn_task_setup; 1247a03d007SEdward Tomasz Napierala static icl_conn_task_done_t icl_soft_conn_task_done; 1257a03d007SEdward Tomasz Napierala static icl_conn_transfer_setup_t icl_soft_conn_transfer_setup; 1267a03d007SEdward Tomasz Napierala static icl_conn_transfer_done_t icl_soft_conn_transfer_done; 127f41492b0SEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 128f41492b0SEdward Tomasz Napierala static icl_conn_connect_t icl_soft_conn_connect; 129f41492b0SEdward Tomasz Napierala #endif 130321b17ecSEdward Tomasz Napierala 131321b17ecSEdward Tomasz Napierala static kobj_method_t icl_soft_methods[] = { 132321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_new_pdu, icl_soft_conn_new_pdu), 133321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_free, icl_soft_conn_pdu_free), 134321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_data_segment_length, 135321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length), 136321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_append_data, icl_soft_conn_pdu_append_data), 137321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_get_data, icl_soft_conn_pdu_get_data), 138321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_queue, icl_soft_conn_pdu_queue), 1399a4510acSAlexander Motin KOBJMETHOD(icl_conn_pdu_queue_cb, icl_soft_conn_pdu_queue_cb), 140321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_handoff, icl_soft_conn_handoff), 141321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_free, icl_soft_conn_free), 142321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_close, icl_soft_conn_close), 1437a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_task_setup, icl_soft_conn_task_setup), 1447a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_task_done, icl_soft_conn_task_done), 1457a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_transfer_setup, icl_soft_conn_transfer_setup), 1467a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_transfer_done, icl_soft_conn_transfer_done), 147f41492b0SEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 148f41492b0SEdward Tomasz Napierala KOBJMETHOD(icl_conn_connect, icl_soft_conn_connect), 149f41492b0SEdward Tomasz Napierala #endif 150321b17ecSEdward Tomasz Napierala { 0, 0 } 151321b17ecSEdward Tomasz Napierala }; 152321b17ecSEdward Tomasz Napierala 153321b17ecSEdward Tomasz Napierala DEFINE_CLASS(icl_soft, icl_soft_methods, sizeof(struct icl_conn)); 154321b17ecSEdward Tomasz Napierala 155321b17ecSEdward Tomasz Napierala static void 156321b17ecSEdward Tomasz Napierala icl_conn_fail(struct icl_conn *ic) 157321b17ecSEdward Tomasz Napierala { 158321b17ecSEdward Tomasz Napierala if (ic->ic_socket == NULL) 159321b17ecSEdward Tomasz Napierala return; 160321b17ecSEdward Tomasz Napierala 161321b17ecSEdward Tomasz Napierala /* 162321b17ecSEdward Tomasz Napierala * XXX 163321b17ecSEdward Tomasz Napierala */ 164321b17ecSEdward Tomasz Napierala ic->ic_socket->so_error = EDOOFUS; 165321b17ecSEdward Tomasz Napierala (ic->ic_error)(ic); 166321b17ecSEdward Tomasz Napierala } 167321b17ecSEdward Tomasz Napierala 168321b17ecSEdward Tomasz Napierala static struct mbuf * 169321b17ecSEdward Tomasz Napierala icl_conn_receive(struct icl_conn *ic, size_t len) 170321b17ecSEdward Tomasz Napierala { 171321b17ecSEdward Tomasz Napierala struct uio uio; 172321b17ecSEdward Tomasz Napierala struct socket *so; 173321b17ecSEdward Tomasz Napierala struct mbuf *m; 174321b17ecSEdward Tomasz Napierala int error, flags; 175321b17ecSEdward Tomasz Napierala 176321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 177321b17ecSEdward Tomasz Napierala 178321b17ecSEdward Tomasz Napierala memset(&uio, 0, sizeof(uio)); 179321b17ecSEdward Tomasz Napierala uio.uio_resid = len; 180321b17ecSEdward Tomasz Napierala 181321b17ecSEdward Tomasz Napierala flags = MSG_DONTWAIT; 182321b17ecSEdward Tomasz Napierala error = soreceive(so, NULL, &uio, &m, NULL, &flags); 183321b17ecSEdward Tomasz Napierala if (error != 0) { 184321b17ecSEdward Tomasz Napierala ICL_DEBUG("soreceive error %d", error); 185321b17ecSEdward Tomasz Napierala return (NULL); 186321b17ecSEdward Tomasz Napierala } 187321b17ecSEdward Tomasz Napierala if (uio.uio_resid != 0) { 188321b17ecSEdward Tomasz Napierala m_freem(m); 189321b17ecSEdward Tomasz Napierala ICL_DEBUG("short read"); 190321b17ecSEdward Tomasz Napierala return (NULL); 191321b17ecSEdward Tomasz Napierala } 192321b17ecSEdward Tomasz Napierala 193321b17ecSEdward Tomasz Napierala return (m); 194321b17ecSEdward Tomasz Napierala } 195321b17ecSEdward Tomasz Napierala 196d0d587c7SAlexander Motin static int 197d0d587c7SAlexander Motin icl_conn_receive_buf(struct icl_conn *ic, void *buf, size_t len) 198d0d587c7SAlexander Motin { 199d0d587c7SAlexander Motin struct iovec iov[1]; 200d0d587c7SAlexander Motin struct uio uio; 201d0d587c7SAlexander Motin struct socket *so; 202d0d587c7SAlexander Motin int error, flags; 203d0d587c7SAlexander Motin 204d0d587c7SAlexander Motin so = ic->ic_socket; 205d0d587c7SAlexander Motin 206d0d587c7SAlexander Motin memset(&uio, 0, sizeof(uio)); 207d0d587c7SAlexander Motin iov[0].iov_base = buf; 208d0d587c7SAlexander Motin iov[0].iov_len = len; 209d0d587c7SAlexander Motin uio.uio_iov = iov; 210d0d587c7SAlexander Motin uio.uio_iovcnt = 1; 211d0d587c7SAlexander Motin uio.uio_offset = 0; 212d0d587c7SAlexander Motin uio.uio_resid = len; 213d0d587c7SAlexander Motin uio.uio_segflg = UIO_SYSSPACE; 214d0d587c7SAlexander Motin uio.uio_rw = UIO_READ; 215d0d587c7SAlexander Motin 216d0d587c7SAlexander Motin flags = MSG_DONTWAIT; 217d0d587c7SAlexander Motin error = soreceive(so, NULL, &uio, NULL, NULL, &flags); 218d0d587c7SAlexander Motin if (error != 0) { 219d0d587c7SAlexander Motin ICL_DEBUG("soreceive error %d", error); 220d0d587c7SAlexander Motin return (-1); 221d0d587c7SAlexander Motin } 222d0d587c7SAlexander Motin if (uio.uio_resid != 0) { 223d0d587c7SAlexander Motin ICL_DEBUG("short read"); 224d0d587c7SAlexander Motin return (-1); 225d0d587c7SAlexander Motin } 226d0d587c7SAlexander Motin 227d0d587c7SAlexander Motin return (0); 228d0d587c7SAlexander Motin } 229d0d587c7SAlexander Motin 23082f7fa7aSAlexander Motin static void 23182f7fa7aSAlexander Motin icl_soft_conn_pdu_free(struct icl_conn *ic, struct icl_pdu *ip) 23282f7fa7aSAlexander Motin { 2339a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 23482f7fa7aSAlexander Motin 2359a4510acSAlexander Motin KASSERT(isp->ref_cnt == 0, ("freeing active PDU")); 23682f7fa7aSAlexander Motin m_freem(ip->ip_bhs_mbuf); 23782f7fa7aSAlexander Motin m_freem(ip->ip_ahs_mbuf); 23882f7fa7aSAlexander Motin m_freem(ip->ip_data_mbuf); 2399a4510acSAlexander Motin uma_zfree(icl_soft_pdu_zone, isp); 24082f7fa7aSAlexander Motin #ifdef DIAGNOSTIC 24182f7fa7aSAlexander Motin refcount_release(&ic->ic_outstanding_pdus); 24282f7fa7aSAlexander Motin #endif 24382f7fa7aSAlexander Motin } 24482f7fa7aSAlexander Motin 2459a4510acSAlexander Motin static void 2469a4510acSAlexander Motin icl_soft_pdu_call_cb(struct icl_pdu *ip) 2479a4510acSAlexander Motin { 2489a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 2499a4510acSAlexander Motin 2509a4510acSAlexander Motin if (isp->cb != NULL) 2519a4510acSAlexander Motin isp->cb(ip, isp->error); 2529a4510acSAlexander Motin #ifdef DIAGNOSTIC 2539a4510acSAlexander Motin refcount_release(&ip->ip_conn->ic_outstanding_pdus); 2549a4510acSAlexander Motin #endif 2559a4510acSAlexander Motin uma_zfree(icl_soft_pdu_zone, isp); 2569a4510acSAlexander Motin } 2579a4510acSAlexander Motin 2589a4510acSAlexander Motin static void 2599a4510acSAlexander Motin icl_soft_pdu_done(struct icl_pdu *ip, int error) 2609a4510acSAlexander Motin { 2619a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 2629a4510acSAlexander Motin 2639a4510acSAlexander Motin if (error != 0) 2649a4510acSAlexander Motin isp->error = error; 2659a4510acSAlexander Motin 2669a4510acSAlexander Motin m_freem(ip->ip_bhs_mbuf); 2679a4510acSAlexander Motin ip->ip_bhs_mbuf = NULL; 2689a4510acSAlexander Motin m_freem(ip->ip_ahs_mbuf); 2699a4510acSAlexander Motin ip->ip_ahs_mbuf = NULL; 2709a4510acSAlexander Motin m_freem(ip->ip_data_mbuf); 2719a4510acSAlexander Motin ip->ip_data_mbuf = NULL; 2729a4510acSAlexander Motin 2739a4510acSAlexander Motin if (atomic_fetchadd_int(&isp->ref_cnt, -1) == 1) 2749a4510acSAlexander Motin icl_soft_pdu_call_cb(ip); 2759a4510acSAlexander Motin } 2769a4510acSAlexander Motin 2779a4510acSAlexander Motin static void 2789a4510acSAlexander Motin icl_soft_mbuf_done(struct mbuf *mb) 2799a4510acSAlexander Motin { 2809a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)mb->m_ext.ext_arg1; 2819a4510acSAlexander Motin 2829a4510acSAlexander Motin icl_soft_pdu_call_cb(&isp->ip); 2839a4510acSAlexander Motin } 2849a4510acSAlexander Motin 28582f7fa7aSAlexander Motin /* 28682f7fa7aSAlexander Motin * Allocate icl_pdu with empty BHS to fill up by the caller. 28782f7fa7aSAlexander Motin */ 28882f7fa7aSAlexander Motin struct icl_pdu * 28982f7fa7aSAlexander Motin icl_soft_conn_new_pdu(struct icl_conn *ic, int flags) 290321b17ecSEdward Tomasz Napierala { 2919a4510acSAlexander Motin struct icl_soft_pdu *isp; 292321b17ecSEdward Tomasz Napierala struct icl_pdu *ip; 293321b17ecSEdward Tomasz Napierala 294321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 295321b17ecSEdward Tomasz Napierala refcount_acquire(&ic->ic_outstanding_pdus); 296321b17ecSEdward Tomasz Napierala #endif 2979a4510acSAlexander Motin isp = uma_zalloc(icl_soft_pdu_zone, flags | M_ZERO); 2989a4510acSAlexander Motin if (isp == NULL) { 2999a4510acSAlexander Motin ICL_WARN("failed to allocate soft PDU"); 300321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 301321b17ecSEdward Tomasz Napierala refcount_release(&ic->ic_outstanding_pdus); 302321b17ecSEdward Tomasz Napierala #endif 303321b17ecSEdward Tomasz Napierala return (NULL); 304321b17ecSEdward Tomasz Napierala } 3059a4510acSAlexander Motin ip = &isp->ip; 306321b17ecSEdward Tomasz Napierala ip->ip_conn = ic; 307321b17ecSEdward Tomasz Napierala 30833d9db92SAlexander Motin CTASSERT(sizeof(struct iscsi_bhs) <= MHLEN); 30933d9db92SAlexander Motin ip->ip_bhs_mbuf = m_gethdr(flags, MT_DATA); 310321b17ecSEdward Tomasz Napierala if (ip->ip_bhs_mbuf == NULL) { 311d0d587c7SAlexander Motin ICL_WARN("failed to allocate BHS mbuf"); 31282f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ip); 313321b17ecSEdward Tomasz Napierala return (NULL); 314321b17ecSEdward Tomasz Napierala } 315321b17ecSEdward Tomasz Napierala ip->ip_bhs = mtod(ip->ip_bhs_mbuf, struct iscsi_bhs *); 316321b17ecSEdward Tomasz Napierala memset(ip->ip_bhs, 0, sizeof(struct iscsi_bhs)); 317321b17ecSEdward Tomasz Napierala ip->ip_bhs_mbuf->m_len = sizeof(struct iscsi_bhs); 318321b17ecSEdward Tomasz Napierala 319321b17ecSEdward Tomasz Napierala return (ip); 320321b17ecSEdward Tomasz Napierala } 321321b17ecSEdward Tomasz Napierala 322321b17ecSEdward Tomasz Napierala static int 323321b17ecSEdward Tomasz Napierala icl_pdu_ahs_length(const struct icl_pdu *request) 324321b17ecSEdward Tomasz Napierala { 325321b17ecSEdward Tomasz Napierala 326321b17ecSEdward Tomasz Napierala return (request->ip_bhs->bhs_total_ahs_len * 4); 327321b17ecSEdward Tomasz Napierala } 328321b17ecSEdward Tomasz Napierala 329321b17ecSEdward Tomasz Napierala static size_t 330321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_length(const struct icl_pdu *request) 331321b17ecSEdward Tomasz Napierala { 332321b17ecSEdward Tomasz Napierala uint32_t len = 0; 333321b17ecSEdward Tomasz Napierala 334321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[0]; 335321b17ecSEdward Tomasz Napierala len <<= 8; 336321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[1]; 337321b17ecSEdward Tomasz Napierala len <<= 8; 338321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[2]; 339321b17ecSEdward Tomasz Napierala 340321b17ecSEdward Tomasz Napierala return (len); 341321b17ecSEdward Tomasz Napierala } 342321b17ecSEdward Tomasz Napierala 343321b17ecSEdward Tomasz Napierala size_t 344321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length(struct icl_conn *ic, 345321b17ecSEdward Tomasz Napierala const struct icl_pdu *request) 346321b17ecSEdward Tomasz Napierala { 347321b17ecSEdward Tomasz Napierala 348321b17ecSEdward Tomasz Napierala return (icl_pdu_data_segment_length(request)); 349321b17ecSEdward Tomasz Napierala } 350321b17ecSEdward Tomasz Napierala 351321b17ecSEdward Tomasz Napierala static void 352321b17ecSEdward Tomasz Napierala icl_pdu_set_data_segment_length(struct icl_pdu *response, uint32_t len) 353321b17ecSEdward Tomasz Napierala { 354321b17ecSEdward Tomasz Napierala 355321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[2] = len; 356321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[1] = len >> 8; 357321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[0] = len >> 16; 358321b17ecSEdward Tomasz Napierala } 359321b17ecSEdward Tomasz Napierala 360321b17ecSEdward Tomasz Napierala static size_t 361321b17ecSEdward Tomasz Napierala icl_pdu_padding(const struct icl_pdu *ip) 362321b17ecSEdward Tomasz Napierala { 363321b17ecSEdward Tomasz Napierala 364321b17ecSEdward Tomasz Napierala if ((ip->ip_data_len % 4) != 0) 365321b17ecSEdward Tomasz Napierala return (4 - (ip->ip_data_len % 4)); 366321b17ecSEdward Tomasz Napierala 367321b17ecSEdward Tomasz Napierala return (0); 368321b17ecSEdward Tomasz Napierala } 369321b17ecSEdward Tomasz Napierala 370321b17ecSEdward Tomasz Napierala static size_t 371321b17ecSEdward Tomasz Napierala icl_pdu_size(const struct icl_pdu *response) 372321b17ecSEdward Tomasz Napierala { 373321b17ecSEdward Tomasz Napierala size_t len; 374321b17ecSEdward Tomasz Napierala 375321b17ecSEdward Tomasz Napierala KASSERT(response->ip_ahs_len == 0, ("responding with AHS")); 376321b17ecSEdward Tomasz Napierala 377321b17ecSEdward Tomasz Napierala len = sizeof(struct iscsi_bhs) + response->ip_data_len + 378321b17ecSEdward Tomasz Napierala icl_pdu_padding(response); 379321b17ecSEdward Tomasz Napierala if (response->ip_conn->ic_header_crc32c) 380321b17ecSEdward Tomasz Napierala len += ISCSI_HEADER_DIGEST_SIZE; 381321b17ecSEdward Tomasz Napierala if (response->ip_data_len != 0 && response->ip_conn->ic_data_crc32c) 382321b17ecSEdward Tomasz Napierala len += ISCSI_DATA_DIGEST_SIZE; 383321b17ecSEdward Tomasz Napierala 384321b17ecSEdward Tomasz Napierala return (len); 385321b17ecSEdward Tomasz Napierala } 386321b17ecSEdward Tomasz Napierala 387321b17ecSEdward Tomasz Napierala static int 388321b17ecSEdward Tomasz Napierala icl_pdu_receive_bhs(struct icl_pdu *request, size_t *availablep) 389321b17ecSEdward Tomasz Napierala { 390321b17ecSEdward Tomasz Napierala 391d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 392d0d587c7SAlexander Motin request->ip_bhs, sizeof(struct iscsi_bhs))) { 393321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive BHS"); 394321b17ecSEdward Tomasz Napierala return (-1); 395321b17ecSEdward Tomasz Napierala } 396321b17ecSEdward Tomasz Napierala 397321b17ecSEdward Tomasz Napierala *availablep -= sizeof(struct iscsi_bhs); 398321b17ecSEdward Tomasz Napierala return (0); 399321b17ecSEdward Tomasz Napierala } 400321b17ecSEdward Tomasz Napierala 401321b17ecSEdward Tomasz Napierala static int 402321b17ecSEdward Tomasz Napierala icl_pdu_receive_ahs(struct icl_pdu *request, size_t *availablep) 403321b17ecSEdward Tomasz Napierala { 404321b17ecSEdward Tomasz Napierala 405321b17ecSEdward Tomasz Napierala request->ip_ahs_len = icl_pdu_ahs_length(request); 406321b17ecSEdward Tomasz Napierala if (request->ip_ahs_len == 0) 407321b17ecSEdward Tomasz Napierala return (0); 408321b17ecSEdward Tomasz Napierala 409321b17ecSEdward Tomasz Napierala request->ip_ahs_mbuf = icl_conn_receive(request->ip_conn, 410321b17ecSEdward Tomasz Napierala request->ip_ahs_len); 411321b17ecSEdward Tomasz Napierala if (request->ip_ahs_mbuf == NULL) { 412321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive AHS"); 413321b17ecSEdward Tomasz Napierala return (-1); 414321b17ecSEdward Tomasz Napierala } 415321b17ecSEdward Tomasz Napierala 416321b17ecSEdward Tomasz Napierala *availablep -= request->ip_ahs_len; 417321b17ecSEdward Tomasz Napierala return (0); 418321b17ecSEdward Tomasz Napierala } 419321b17ecSEdward Tomasz Napierala 420321b17ecSEdward Tomasz Napierala static uint32_t 421321b17ecSEdward Tomasz Napierala icl_mbuf_to_crc32c(const struct mbuf *m0) 422321b17ecSEdward Tomasz Napierala { 423321b17ecSEdward Tomasz Napierala uint32_t digest = 0xffffffff; 424321b17ecSEdward Tomasz Napierala const struct mbuf *m; 425321b17ecSEdward Tomasz Napierala 426321b17ecSEdward Tomasz Napierala for (m = m0; m != NULL; m = m->m_next) 427321b17ecSEdward Tomasz Napierala digest = calculate_crc32c(digest, 428321b17ecSEdward Tomasz Napierala mtod(m, const void *), m->m_len); 429321b17ecSEdward Tomasz Napierala 430321b17ecSEdward Tomasz Napierala digest = digest ^ 0xffffffff; 431321b17ecSEdward Tomasz Napierala 432321b17ecSEdward Tomasz Napierala return (digest); 433321b17ecSEdward Tomasz Napierala } 434321b17ecSEdward Tomasz Napierala 435321b17ecSEdward Tomasz Napierala static int 436321b17ecSEdward Tomasz Napierala icl_pdu_check_header_digest(struct icl_pdu *request, size_t *availablep) 437321b17ecSEdward Tomasz Napierala { 438321b17ecSEdward Tomasz Napierala uint32_t received_digest, valid_digest; 439321b17ecSEdward Tomasz Napierala 440321b17ecSEdward Tomasz Napierala if (request->ip_conn->ic_header_crc32c == false) 441321b17ecSEdward Tomasz Napierala return (0); 442321b17ecSEdward Tomasz Napierala 443d0d587c7SAlexander Motin CTASSERT(sizeof(received_digest) == ISCSI_HEADER_DIGEST_SIZE); 444d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 445d0d587c7SAlexander Motin &received_digest, ISCSI_HEADER_DIGEST_SIZE)) { 446321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive header digest"); 447321b17ecSEdward Tomasz Napierala return (-1); 448321b17ecSEdward Tomasz Napierala } 449321b17ecSEdward Tomasz Napierala *availablep -= ISCSI_HEADER_DIGEST_SIZE; 450321b17ecSEdward Tomasz Napierala 451875ac6cfSAlexander Motin /* Temporary attach AHS to BHS to calculate header digest. */ 452875ac6cfSAlexander Motin request->ip_bhs_mbuf->m_next = request->ip_ahs_mbuf; 453321b17ecSEdward Tomasz Napierala valid_digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf); 454875ac6cfSAlexander Motin request->ip_bhs_mbuf->m_next = NULL; 455321b17ecSEdward Tomasz Napierala if (received_digest != valid_digest) { 456321b17ecSEdward Tomasz Napierala ICL_WARN("header digest check failed; got 0x%x, " 457321b17ecSEdward Tomasz Napierala "should be 0x%x", received_digest, valid_digest); 458321b17ecSEdward Tomasz Napierala return (-1); 459321b17ecSEdward Tomasz Napierala } 460321b17ecSEdward Tomasz Napierala 461321b17ecSEdward Tomasz Napierala return (0); 462321b17ecSEdward Tomasz Napierala } 463321b17ecSEdward Tomasz Napierala 464321b17ecSEdward Tomasz Napierala /* 465321b17ecSEdward Tomasz Napierala * Return the number of bytes that should be waiting in the receive socket 466321b17ecSEdward Tomasz Napierala * before icl_pdu_receive_data_segment() gets called. 467321b17ecSEdward Tomasz Napierala */ 468321b17ecSEdward Tomasz Napierala static size_t 469321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(const struct icl_pdu *request) 470321b17ecSEdward Tomasz Napierala { 471321b17ecSEdward Tomasz Napierala size_t len; 472321b17ecSEdward Tomasz Napierala 473321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 474321b17ecSEdward Tomasz Napierala if (len == 0) 475321b17ecSEdward Tomasz Napierala return (0); 476321b17ecSEdward Tomasz Napierala 477321b17ecSEdward Tomasz Napierala /* 478321b17ecSEdward Tomasz Napierala * Account for the parts of data segment already read from 479321b17ecSEdward Tomasz Napierala * the socket buffer. 480321b17ecSEdward Tomasz Napierala */ 481321b17ecSEdward Tomasz Napierala KASSERT(len > request->ip_data_len, ("len <= request->ip_data_len")); 482321b17ecSEdward Tomasz Napierala len -= request->ip_data_len; 483321b17ecSEdward Tomasz Napierala 484321b17ecSEdward Tomasz Napierala /* 485321b17ecSEdward Tomasz Napierala * Don't always wait for the full data segment to be delivered 486321b17ecSEdward Tomasz Napierala * to the socket; this might badly affect performance due to 487321b17ecSEdward Tomasz Napierala * TCP window scaling. 488321b17ecSEdward Tomasz Napierala */ 489321b17ecSEdward Tomasz Napierala if (len > partial_receive_len) { 490321b17ecSEdward Tomasz Napierala #if 0 491321b17ecSEdward Tomasz Napierala ICL_DEBUG("need %zd bytes of data, limiting to %zd", 492321b17ecSEdward Tomasz Napierala len, partial_receive_len)); 493321b17ecSEdward Tomasz Napierala #endif 494321b17ecSEdward Tomasz Napierala len = partial_receive_len; 495321b17ecSEdward Tomasz Napierala 496321b17ecSEdward Tomasz Napierala return (len); 497321b17ecSEdward Tomasz Napierala } 498321b17ecSEdward Tomasz Napierala 499321b17ecSEdward Tomasz Napierala /* 500321b17ecSEdward Tomasz Napierala * Account for padding. Note that due to the way code is written, 501321b17ecSEdward Tomasz Napierala * the icl_pdu_receive_data_segment() must always receive padding 502321b17ecSEdward Tomasz Napierala * along with the last part of data segment, because it would be 503321b17ecSEdward Tomasz Napierala * impossible to tell whether we've already received the full data 504321b17ecSEdward Tomasz Napierala * segment including padding, or without it. 505321b17ecSEdward Tomasz Napierala */ 506321b17ecSEdward Tomasz Napierala if ((len % 4) != 0) 507321b17ecSEdward Tomasz Napierala len += 4 - (len % 4); 508321b17ecSEdward Tomasz Napierala 509321b17ecSEdward Tomasz Napierala #if 0 510321b17ecSEdward Tomasz Napierala ICL_DEBUG("need %zd bytes of data", len)); 511321b17ecSEdward Tomasz Napierala #endif 512321b17ecSEdward Tomasz Napierala 513321b17ecSEdward Tomasz Napierala return (len); 514321b17ecSEdward Tomasz Napierala } 515321b17ecSEdward Tomasz Napierala 516321b17ecSEdward Tomasz Napierala static int 517321b17ecSEdward Tomasz Napierala icl_pdu_receive_data_segment(struct icl_pdu *request, 518321b17ecSEdward Tomasz Napierala size_t *availablep, bool *more_neededp) 519321b17ecSEdward Tomasz Napierala { 520321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 521321b17ecSEdward Tomasz Napierala size_t len, padding = 0; 522321b17ecSEdward Tomasz Napierala struct mbuf *m; 523321b17ecSEdward Tomasz Napierala 524321b17ecSEdward Tomasz Napierala ic = request->ip_conn; 525321b17ecSEdward Tomasz Napierala 526321b17ecSEdward Tomasz Napierala *more_neededp = false; 527321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 528321b17ecSEdward Tomasz Napierala 529321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 530321b17ecSEdward Tomasz Napierala if (len == 0) 531321b17ecSEdward Tomasz Napierala return (0); 532321b17ecSEdward Tomasz Napierala 533321b17ecSEdward Tomasz Napierala if ((len % 4) != 0) 534321b17ecSEdward Tomasz Napierala padding = 4 - (len % 4); 535321b17ecSEdward Tomasz Napierala 536321b17ecSEdward Tomasz Napierala /* 537321b17ecSEdward Tomasz Napierala * Account for already received parts of data segment. 538321b17ecSEdward Tomasz Napierala */ 539321b17ecSEdward Tomasz Napierala KASSERT(len > request->ip_data_len, ("len <= request->ip_data_len")); 540321b17ecSEdward Tomasz Napierala len -= request->ip_data_len; 541321b17ecSEdward Tomasz Napierala 542321b17ecSEdward Tomasz Napierala if (len + padding > *availablep) { 543321b17ecSEdward Tomasz Napierala /* 544321b17ecSEdward Tomasz Napierala * Not enough data in the socket buffer. Receive as much 545321b17ecSEdward Tomasz Napierala * as we can. Don't receive padding, since, obviously, it's 546321b17ecSEdward Tomasz Napierala * not the end of data segment yet. 547321b17ecSEdward Tomasz Napierala */ 548321b17ecSEdward Tomasz Napierala #if 0 549321b17ecSEdward Tomasz Napierala ICL_DEBUG("limited from %zd to %zd", 550321b17ecSEdward Tomasz Napierala len + padding, *availablep - padding)); 551321b17ecSEdward Tomasz Napierala #endif 552321b17ecSEdward Tomasz Napierala len = *availablep - padding; 553321b17ecSEdward Tomasz Napierala *more_neededp = true; 554321b17ecSEdward Tomasz Napierala padding = 0; 555321b17ecSEdward Tomasz Napierala } 556321b17ecSEdward Tomasz Napierala 557321b17ecSEdward Tomasz Napierala /* 558321b17ecSEdward Tomasz Napierala * Must not try to receive padding without at least one byte 559321b17ecSEdward Tomasz Napierala * of actual data segment. 560321b17ecSEdward Tomasz Napierala */ 561321b17ecSEdward Tomasz Napierala if (len > 0) { 562321b17ecSEdward Tomasz Napierala m = icl_conn_receive(request->ip_conn, len + padding); 563321b17ecSEdward Tomasz Napierala if (m == NULL) { 564321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data segment"); 565321b17ecSEdward Tomasz Napierala return (-1); 566321b17ecSEdward Tomasz Napierala } 567321b17ecSEdward Tomasz Napierala 568321b17ecSEdward Tomasz Napierala if (request->ip_data_mbuf == NULL) 569321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = m; 570321b17ecSEdward Tomasz Napierala else 571321b17ecSEdward Tomasz Napierala m_cat(request->ip_data_mbuf, m); 572321b17ecSEdward Tomasz Napierala 573321b17ecSEdward Tomasz Napierala request->ip_data_len += len; 574321b17ecSEdward Tomasz Napierala *availablep -= len + padding; 575321b17ecSEdward Tomasz Napierala } else 576321b17ecSEdward Tomasz Napierala ICL_DEBUG("len 0"); 577321b17ecSEdward Tomasz Napierala 578321b17ecSEdward Tomasz Napierala if (*more_neededp) 579321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 580321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(request); 581321b17ecSEdward Tomasz Napierala 582321b17ecSEdward Tomasz Napierala return (0); 583321b17ecSEdward Tomasz Napierala } 584321b17ecSEdward Tomasz Napierala 585321b17ecSEdward Tomasz Napierala static int 586321b17ecSEdward Tomasz Napierala icl_pdu_check_data_digest(struct icl_pdu *request, size_t *availablep) 587321b17ecSEdward Tomasz Napierala { 588321b17ecSEdward Tomasz Napierala uint32_t received_digest, valid_digest; 589321b17ecSEdward Tomasz Napierala 590321b17ecSEdward Tomasz Napierala if (request->ip_conn->ic_data_crc32c == false) 591321b17ecSEdward Tomasz Napierala return (0); 592321b17ecSEdward Tomasz Napierala 593321b17ecSEdward Tomasz Napierala if (request->ip_data_len == 0) 594321b17ecSEdward Tomasz Napierala return (0); 595321b17ecSEdward Tomasz Napierala 596d0d587c7SAlexander Motin CTASSERT(sizeof(received_digest) == ISCSI_DATA_DIGEST_SIZE); 597d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 598d0d587c7SAlexander Motin &received_digest, ISCSI_DATA_DIGEST_SIZE)) { 599321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data digest"); 600321b17ecSEdward Tomasz Napierala return (-1); 601321b17ecSEdward Tomasz Napierala } 602321b17ecSEdward Tomasz Napierala *availablep -= ISCSI_DATA_DIGEST_SIZE; 603321b17ecSEdward Tomasz Napierala 604321b17ecSEdward Tomasz Napierala /* 605321b17ecSEdward Tomasz Napierala * Note that ip_data_mbuf also contains padding; since digest 606321b17ecSEdward Tomasz Napierala * calculation is supposed to include that, we iterate over 607321b17ecSEdward Tomasz Napierala * the entire ip_data_mbuf chain, not just ip_data_len bytes of it. 608321b17ecSEdward Tomasz Napierala */ 609321b17ecSEdward Tomasz Napierala valid_digest = icl_mbuf_to_crc32c(request->ip_data_mbuf); 610321b17ecSEdward Tomasz Napierala if (received_digest != valid_digest) { 611321b17ecSEdward Tomasz Napierala ICL_WARN("data digest check failed; got 0x%x, " 612321b17ecSEdward Tomasz Napierala "should be 0x%x", received_digest, valid_digest); 613321b17ecSEdward Tomasz Napierala return (-1); 614321b17ecSEdward Tomasz Napierala } 615321b17ecSEdward Tomasz Napierala 616321b17ecSEdward Tomasz Napierala return (0); 617321b17ecSEdward Tomasz Napierala } 618321b17ecSEdward Tomasz Napierala 619321b17ecSEdward Tomasz Napierala /* 620321b17ecSEdward Tomasz Napierala * Somewhat contrary to the name, this attempts to receive only one 621321b17ecSEdward Tomasz Napierala * "part" of PDU at a time; call it repeatedly until it returns non-NULL. 622321b17ecSEdward Tomasz Napierala */ 623321b17ecSEdward Tomasz Napierala static struct icl_pdu * 624321b17ecSEdward Tomasz Napierala icl_conn_receive_pdu(struct icl_conn *ic, size_t *availablep) 625321b17ecSEdward Tomasz Napierala { 626321b17ecSEdward Tomasz Napierala struct icl_pdu *request; 627321b17ecSEdward Tomasz Napierala struct socket *so; 628321b17ecSEdward Tomasz Napierala size_t len; 629321b17ecSEdward Tomasz Napierala int error; 630321b17ecSEdward Tomasz Napierala bool more_needed; 631321b17ecSEdward Tomasz Napierala 632321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 633321b17ecSEdward Tomasz Napierala 634321b17ecSEdward Tomasz Napierala if (ic->ic_receive_state == ICL_CONN_STATE_BHS) { 635321b17ecSEdward Tomasz Napierala KASSERT(ic->ic_receive_pdu == NULL, 636321b17ecSEdward Tomasz Napierala ("ic->ic_receive_pdu != NULL")); 637d0d587c7SAlexander Motin request = icl_soft_conn_new_pdu(ic, M_NOWAIT); 638321b17ecSEdward Tomasz Napierala if (request == NULL) { 639321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to allocate PDU; " 640321b17ecSEdward Tomasz Napierala "dropping connection"); 641321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 642321b17ecSEdward Tomasz Napierala return (NULL); 643321b17ecSEdward Tomasz Napierala } 644321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = request; 645321b17ecSEdward Tomasz Napierala } else { 646321b17ecSEdward Tomasz Napierala KASSERT(ic->ic_receive_pdu != NULL, 647321b17ecSEdward Tomasz Napierala ("ic->ic_receive_pdu == NULL")); 648321b17ecSEdward Tomasz Napierala request = ic->ic_receive_pdu; 649321b17ecSEdward Tomasz Napierala } 650321b17ecSEdward Tomasz Napierala 651321b17ecSEdward Tomasz Napierala if (*availablep < ic->ic_receive_len) { 652321b17ecSEdward Tomasz Napierala #if 0 653321b17ecSEdward Tomasz Napierala ICL_DEBUG("not enough data; need %zd, " 654321b17ecSEdward Tomasz Napierala "have %zd", ic->ic_receive_len, *availablep); 655321b17ecSEdward Tomasz Napierala #endif 656321b17ecSEdward Tomasz Napierala return (NULL); 657321b17ecSEdward Tomasz Napierala } 658321b17ecSEdward Tomasz Napierala 659321b17ecSEdward Tomasz Napierala switch (ic->ic_receive_state) { 660321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_BHS: 661321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving BHS"); 662321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_bhs(request, availablep); 663321b17ecSEdward Tomasz Napierala if (error != 0) { 664321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive BHS; " 665321b17ecSEdward Tomasz Napierala "dropping connection"); 666321b17ecSEdward Tomasz Napierala break; 667321b17ecSEdward Tomasz Napierala } 668321b17ecSEdward Tomasz Napierala 669321b17ecSEdward Tomasz Napierala /* 670321b17ecSEdward Tomasz Napierala * We don't enforce any limit for AHS length; 671321b17ecSEdward Tomasz Napierala * its length is stored in 8 bit field. 672321b17ecSEdward Tomasz Napierala */ 673321b17ecSEdward Tomasz Napierala 674321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 675321b17ecSEdward Tomasz Napierala if (len > ic->ic_max_data_segment_length) { 676321b17ecSEdward Tomasz Napierala ICL_WARN("received data segment " 677*b75168edSAlexander Motin "length %zd is larger than negotiated; " 678*b75168edSAlexander Motin "dropping connection", len); 679321b17ecSEdward Tomasz Napierala error = EINVAL; 680321b17ecSEdward Tomasz Napierala break; 681321b17ecSEdward Tomasz Napierala } 682321b17ecSEdward Tomasz Napierala 683321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_AHS; 684321b17ecSEdward Tomasz Napierala ic->ic_receive_len = icl_pdu_ahs_length(request); 685321b17ecSEdward Tomasz Napierala break; 686321b17ecSEdward Tomasz Napierala 687321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_AHS: 688321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving AHS"); 689321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_ahs(request, availablep); 690321b17ecSEdward Tomasz Napierala if (error != 0) { 691321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive AHS; " 692321b17ecSEdward Tomasz Napierala "dropping connection"); 693321b17ecSEdward Tomasz Napierala break; 694321b17ecSEdward Tomasz Napierala } 695321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_HEADER_DIGEST; 696321b17ecSEdward Tomasz Napierala if (ic->ic_header_crc32c == false) 697321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 698321b17ecSEdward Tomasz Napierala else 699321b17ecSEdward Tomasz Napierala ic->ic_receive_len = ISCSI_HEADER_DIGEST_SIZE; 700321b17ecSEdward Tomasz Napierala break; 701321b17ecSEdward Tomasz Napierala 702321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_HEADER_DIGEST: 703321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving header digest"); 704321b17ecSEdward Tomasz Napierala error = icl_pdu_check_header_digest(request, availablep); 705321b17ecSEdward Tomasz Napierala if (error != 0) { 706321b17ecSEdward Tomasz Napierala ICL_DEBUG("header digest failed; " 707321b17ecSEdward Tomasz Napierala "dropping connection"); 708321b17ecSEdward Tomasz Napierala break; 709321b17ecSEdward Tomasz Napierala } 710321b17ecSEdward Tomasz Napierala 711321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_DATA; 712321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 713321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(request); 714321b17ecSEdward Tomasz Napierala break; 715321b17ecSEdward Tomasz Napierala 716321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_DATA: 717321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving data segment"); 718321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_data_segment(request, availablep, 719321b17ecSEdward Tomasz Napierala &more_needed); 720321b17ecSEdward Tomasz Napierala if (error != 0) { 721321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data segment;" 722321b17ecSEdward Tomasz Napierala "dropping connection"); 723321b17ecSEdward Tomasz Napierala break; 724321b17ecSEdward Tomasz Napierala } 725321b17ecSEdward Tomasz Napierala 726321b17ecSEdward Tomasz Napierala if (more_needed) 727321b17ecSEdward Tomasz Napierala break; 728321b17ecSEdward Tomasz Napierala 729321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_DATA_DIGEST; 730321b17ecSEdward Tomasz Napierala if (request->ip_data_len == 0 || ic->ic_data_crc32c == false) 731321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 732321b17ecSEdward Tomasz Napierala else 733321b17ecSEdward Tomasz Napierala ic->ic_receive_len = ISCSI_DATA_DIGEST_SIZE; 734321b17ecSEdward Tomasz Napierala break; 735321b17ecSEdward Tomasz Napierala 736321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_DATA_DIGEST: 737321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving data digest"); 738321b17ecSEdward Tomasz Napierala error = icl_pdu_check_data_digest(request, availablep); 739321b17ecSEdward Tomasz Napierala if (error != 0) { 740321b17ecSEdward Tomasz Napierala ICL_DEBUG("data digest failed; " 741321b17ecSEdward Tomasz Napierala "dropping connection"); 742321b17ecSEdward Tomasz Napierala break; 743321b17ecSEdward Tomasz Napierala } 744321b17ecSEdward Tomasz Napierala 745321b17ecSEdward Tomasz Napierala /* 746321b17ecSEdward Tomasz Napierala * We've received complete PDU; reset the receive state machine 747321b17ecSEdward Tomasz Napierala * and return the PDU. 748321b17ecSEdward Tomasz Napierala */ 749321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_BHS; 750321b17ecSEdward Tomasz Napierala ic->ic_receive_len = sizeof(struct iscsi_bhs); 751321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = NULL; 752321b17ecSEdward Tomasz Napierala return (request); 753321b17ecSEdward Tomasz Napierala 754321b17ecSEdward Tomasz Napierala default: 755321b17ecSEdward Tomasz Napierala panic("invalid ic_receive_state %d\n", ic->ic_receive_state); 756321b17ecSEdward Tomasz Napierala } 757321b17ecSEdward Tomasz Napierala 758321b17ecSEdward Tomasz Napierala if (error != 0) { 759321b17ecSEdward Tomasz Napierala /* 760321b17ecSEdward Tomasz Napierala * Don't free the PDU; it's pointed to by ic->ic_receive_pdu 7615aabcd7cSEdward Tomasz Napierala * and will get freed in icl_soft_conn_close(). 762321b17ecSEdward Tomasz Napierala */ 763321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 764321b17ecSEdward Tomasz Napierala } 765321b17ecSEdward Tomasz Napierala 766321b17ecSEdward Tomasz Napierala return (NULL); 767321b17ecSEdward Tomasz Napierala } 768321b17ecSEdward Tomasz Napierala 769321b17ecSEdward Tomasz Napierala static void 770321b17ecSEdward Tomasz Napierala icl_conn_receive_pdus(struct icl_conn *ic, size_t available) 771321b17ecSEdward Tomasz Napierala { 772321b17ecSEdward Tomasz Napierala struct icl_pdu *response; 773321b17ecSEdward Tomasz Napierala struct socket *so; 774321b17ecSEdward Tomasz Napierala 775321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 776321b17ecSEdward Tomasz Napierala 777321b17ecSEdward Tomasz Napierala /* 778321b17ecSEdward Tomasz Napierala * This can never happen; we're careful to only mess with ic->ic_socket 779321b17ecSEdward Tomasz Napierala * pointer when the send/receive threads are not running. 780321b17ecSEdward Tomasz Napierala */ 781321b17ecSEdward Tomasz Napierala KASSERT(so != NULL, ("NULL socket")); 782321b17ecSEdward Tomasz Napierala 783321b17ecSEdward Tomasz Napierala for (;;) { 784321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) 785321b17ecSEdward Tomasz Napierala return; 786321b17ecSEdward Tomasz Napierala 787321b17ecSEdward Tomasz Napierala if (so->so_error != 0) { 788321b17ecSEdward Tomasz Napierala ICL_DEBUG("connection error %d; " 789321b17ecSEdward Tomasz Napierala "dropping connection", so->so_error); 790321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 791321b17ecSEdward Tomasz Napierala return; 792321b17ecSEdward Tomasz Napierala } 793321b17ecSEdward Tomasz Napierala 794321b17ecSEdward Tomasz Napierala /* 795321b17ecSEdward Tomasz Napierala * Loop until we have a complete PDU or there is not enough 796321b17ecSEdward Tomasz Napierala * data in the socket buffer. 797321b17ecSEdward Tomasz Napierala */ 798321b17ecSEdward Tomasz Napierala if (available < ic->ic_receive_len) { 799321b17ecSEdward Tomasz Napierala #if 0 800321b17ecSEdward Tomasz Napierala ICL_DEBUG("not enough data; have %zd, " 801321b17ecSEdward Tomasz Napierala "need %zd", available, 802321b17ecSEdward Tomasz Napierala ic->ic_receive_len); 803321b17ecSEdward Tomasz Napierala #endif 804321b17ecSEdward Tomasz Napierala return; 805321b17ecSEdward Tomasz Napierala } 806321b17ecSEdward Tomasz Napierala 807321b17ecSEdward Tomasz Napierala response = icl_conn_receive_pdu(ic, &available); 808321b17ecSEdward Tomasz Napierala if (response == NULL) 809321b17ecSEdward Tomasz Napierala continue; 810321b17ecSEdward Tomasz Napierala 811321b17ecSEdward Tomasz Napierala if (response->ip_ahs_len > 0) { 812321b17ecSEdward Tomasz Napierala ICL_WARN("received PDU with unsupported " 813321b17ecSEdward Tomasz Napierala "AHS; opcode 0x%x; dropping connection", 814321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_opcode); 81582f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, response); 816321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 817321b17ecSEdward Tomasz Napierala return; 818321b17ecSEdward Tomasz Napierala } 819321b17ecSEdward Tomasz Napierala 820321b17ecSEdward Tomasz Napierala (ic->ic_receive)(response); 821321b17ecSEdward Tomasz Napierala } 822321b17ecSEdward Tomasz Napierala } 823321b17ecSEdward Tomasz Napierala 824321b17ecSEdward Tomasz Napierala static void 825321b17ecSEdward Tomasz Napierala icl_receive_thread(void *arg) 826321b17ecSEdward Tomasz Napierala { 827321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 828321b17ecSEdward Tomasz Napierala size_t available; 829321b17ecSEdward Tomasz Napierala struct socket *so; 830321b17ecSEdward Tomasz Napierala 831321b17ecSEdward Tomasz Napierala ic = arg; 832321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 833321b17ecSEdward Tomasz Napierala 834321b17ecSEdward Tomasz Napierala for (;;) { 835321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) { 836321b17ecSEdward Tomasz Napierala //ICL_DEBUG("terminating"); 837321b17ecSEdward Tomasz Napierala break; 838321b17ecSEdward Tomasz Napierala } 839321b17ecSEdward Tomasz Napierala 840321b17ecSEdward Tomasz Napierala /* 841321b17ecSEdward Tomasz Napierala * Set the low watermark, to be checked by 842321b17ecSEdward Tomasz Napierala * soreadable() in icl_soupcall_receive() 843266078c6SPedro F. Giffuni * to avoid unnecessary wakeups until there 844321b17ecSEdward Tomasz Napierala * is enough data received to read the PDU. 845321b17ecSEdward Tomasz Napierala */ 846321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_rcv); 847321b17ecSEdward Tomasz Napierala available = sbavail(&so->so_rcv); 848321b17ecSEdward Tomasz Napierala if (available < ic->ic_receive_len) { 849321b17ecSEdward Tomasz Napierala so->so_rcv.sb_lowat = ic->ic_receive_len; 850321b17ecSEdward Tomasz Napierala cv_wait(&ic->ic_receive_cv, &so->so_rcv.sb_mtx); 851321b17ecSEdward Tomasz Napierala } else 852321b17ecSEdward Tomasz Napierala so->so_rcv.sb_lowat = so->so_rcv.sb_hiwat + 1; 853321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_rcv); 854321b17ecSEdward Tomasz Napierala 855321b17ecSEdward Tomasz Napierala icl_conn_receive_pdus(ic, available); 856321b17ecSEdward Tomasz Napierala } 857321b17ecSEdward Tomasz Napierala 858321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 859321b17ecSEdward Tomasz Napierala ic->ic_receive_running = false; 860321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 861321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 862321b17ecSEdward Tomasz Napierala kthread_exit(); 863321b17ecSEdward Tomasz Napierala } 864321b17ecSEdward Tomasz Napierala 865321b17ecSEdward Tomasz Napierala static int 866321b17ecSEdward Tomasz Napierala icl_soupcall_receive(struct socket *so, void *arg, int waitflag) 867321b17ecSEdward Tomasz Napierala { 868321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 869321b17ecSEdward Tomasz Napierala 870321b17ecSEdward Tomasz Napierala if (!soreadable(so)) 871321b17ecSEdward Tomasz Napierala return (SU_OK); 872321b17ecSEdward Tomasz Napierala 873321b17ecSEdward Tomasz Napierala ic = arg; 874321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_receive_cv); 875321b17ecSEdward Tomasz Napierala return (SU_OK); 876321b17ecSEdward Tomasz Napierala } 877321b17ecSEdward Tomasz Napierala 878321b17ecSEdward Tomasz Napierala static int 879321b17ecSEdward Tomasz Napierala icl_pdu_finalize(struct icl_pdu *request) 880321b17ecSEdward Tomasz Napierala { 881321b17ecSEdward Tomasz Napierala size_t padding, pdu_len; 882321b17ecSEdward Tomasz Napierala uint32_t digest, zero = 0; 883321b17ecSEdward Tomasz Napierala int ok; 884321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 885321b17ecSEdward Tomasz Napierala 886321b17ecSEdward Tomasz Napierala ic = request->ip_conn; 887321b17ecSEdward Tomasz Napierala 888321b17ecSEdward Tomasz Napierala icl_pdu_set_data_segment_length(request, request->ip_data_len); 889321b17ecSEdward Tomasz Napierala 890321b17ecSEdward Tomasz Napierala pdu_len = icl_pdu_size(request); 891321b17ecSEdward Tomasz Napierala 892321b17ecSEdward Tomasz Napierala if (ic->ic_header_crc32c) { 893321b17ecSEdward Tomasz Napierala digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf); 894321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_bhs_mbuf, sizeof(digest), 895321b17ecSEdward Tomasz Napierala (void *)&digest); 896321b17ecSEdward Tomasz Napierala if (ok != 1) { 897321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append header digest"); 898321b17ecSEdward Tomasz Napierala return (1); 899321b17ecSEdward Tomasz Napierala } 900321b17ecSEdward Tomasz Napierala } 901321b17ecSEdward Tomasz Napierala 902321b17ecSEdward Tomasz Napierala if (request->ip_data_len != 0) { 903321b17ecSEdward Tomasz Napierala padding = icl_pdu_padding(request); 904321b17ecSEdward Tomasz Napierala if (padding > 0) { 905321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_data_mbuf, padding, 906321b17ecSEdward Tomasz Napierala (void *)&zero); 907321b17ecSEdward Tomasz Napierala if (ok != 1) { 908321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append padding"); 909321b17ecSEdward Tomasz Napierala return (1); 910321b17ecSEdward Tomasz Napierala } 911321b17ecSEdward Tomasz Napierala } 912321b17ecSEdward Tomasz Napierala 913321b17ecSEdward Tomasz Napierala if (ic->ic_data_crc32c) { 914321b17ecSEdward Tomasz Napierala digest = icl_mbuf_to_crc32c(request->ip_data_mbuf); 915321b17ecSEdward Tomasz Napierala 916321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_data_mbuf, sizeof(digest), 917321b17ecSEdward Tomasz Napierala (void *)&digest); 918321b17ecSEdward Tomasz Napierala if (ok != 1) { 919321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append data digest"); 920321b17ecSEdward Tomasz Napierala return (1); 921321b17ecSEdward Tomasz Napierala } 922321b17ecSEdward Tomasz Napierala } 923321b17ecSEdward Tomasz Napierala 924321b17ecSEdward Tomasz Napierala m_cat(request->ip_bhs_mbuf, request->ip_data_mbuf); 925321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = NULL; 926321b17ecSEdward Tomasz Napierala } 927321b17ecSEdward Tomasz Napierala 928321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf->m_pkthdr.len = pdu_len; 929321b17ecSEdward Tomasz Napierala 930321b17ecSEdward Tomasz Napierala return (0); 931321b17ecSEdward Tomasz Napierala } 932321b17ecSEdward Tomasz Napierala 933321b17ecSEdward Tomasz Napierala static void 934321b17ecSEdward Tomasz Napierala icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue) 935321b17ecSEdward Tomasz Napierala { 936321b17ecSEdward Tomasz Napierala struct icl_pdu *request, *request2; 937321b17ecSEdward Tomasz Napierala struct socket *so; 938605703b5SAlexander Motin long available, size, size2; 939321b17ecSEdward Tomasz Napierala int coalesced, error; 940321b17ecSEdward Tomasz Napierala 941321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 942321b17ecSEdward Tomasz Napierala 943321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 944321b17ecSEdward Tomasz Napierala 945321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_snd); 946321b17ecSEdward Tomasz Napierala /* 947321b17ecSEdward Tomasz Napierala * Check how much space do we have for transmit. We can't just 948321b17ecSEdward Tomasz Napierala * call sosend() and retry when we get EWOULDBLOCK or EMSGSIZE, 949321b17ecSEdward Tomasz Napierala * as it always frees the mbuf chain passed to it, even in case 950321b17ecSEdward Tomasz Napierala * of error. 951321b17ecSEdward Tomasz Napierala */ 952321b17ecSEdward Tomasz Napierala available = sbspace(&so->so_snd); 953321b17ecSEdward Tomasz Napierala 954321b17ecSEdward Tomasz Napierala /* 955321b17ecSEdward Tomasz Napierala * Notify the socket upcall that we don't need wakeups 956321b17ecSEdward Tomasz Napierala * for the time being. 957321b17ecSEdward Tomasz Napierala */ 958321b17ecSEdward Tomasz Napierala so->so_snd.sb_lowat = so->so_snd.sb_hiwat + 1; 959321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 960321b17ecSEdward Tomasz Napierala 961321b17ecSEdward Tomasz Napierala while (!STAILQ_EMPTY(queue)) { 962321b17ecSEdward Tomasz Napierala request = STAILQ_FIRST(queue); 963321b17ecSEdward Tomasz Napierala size = icl_pdu_size(request); 964321b17ecSEdward Tomasz Napierala if (available < size) { 965321b17ecSEdward Tomasz Napierala /* 966321b17ecSEdward Tomasz Napierala * Set the low watermark, to be checked by 967321b17ecSEdward Tomasz Napierala * sowriteable() in icl_soupcall_send() 968266078c6SPedro F. Giffuni * to avoid unnecessary wakeups until there 969321b17ecSEdward Tomasz Napierala * is enough space for the PDU to fit. 970321b17ecSEdward Tomasz Napierala */ 971321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_snd); 972321b17ecSEdward Tomasz Napierala available = sbspace(&so->so_snd); 973321b17ecSEdward Tomasz Napierala if (available < size) { 974321b17ecSEdward Tomasz Napierala #if 1 975321b17ecSEdward Tomasz Napierala ICL_DEBUG("no space to send; " 976605703b5SAlexander Motin "have %ld, need %ld", 977321b17ecSEdward Tomasz Napierala available, size); 978321b17ecSEdward Tomasz Napierala #endif 9791f29b46cSAlexander Motin so->so_snd.sb_lowat = max(size, 9801f29b46cSAlexander Motin so->so_snd.sb_hiwat / 8); 981321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 982321b17ecSEdward Tomasz Napierala return; 983321b17ecSEdward Tomasz Napierala } 984321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 985321b17ecSEdward Tomasz Napierala } 986321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(queue, ip_next); 987321b17ecSEdward Tomasz Napierala error = icl_pdu_finalize(request); 988321b17ecSEdward Tomasz Napierala if (error != 0) { 989321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to finalize PDU; " 990321b17ecSEdward Tomasz Napierala "dropping connection"); 9919a4510acSAlexander Motin icl_soft_pdu_done(request, EIO); 992321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 993321b17ecSEdward Tomasz Napierala return; 994321b17ecSEdward Tomasz Napierala } 995321b17ecSEdward Tomasz Napierala if (coalesce) { 996321b17ecSEdward Tomasz Napierala coalesced = 1; 997321b17ecSEdward Tomasz Napierala for (;;) { 998321b17ecSEdward Tomasz Napierala request2 = STAILQ_FIRST(queue); 999321b17ecSEdward Tomasz Napierala if (request2 == NULL) 1000321b17ecSEdward Tomasz Napierala break; 1001321b17ecSEdward Tomasz Napierala size2 = icl_pdu_size(request2); 1002321b17ecSEdward Tomasz Napierala if (available < size + size2) 1003321b17ecSEdward Tomasz Napierala break; 1004321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(queue, ip_next); 1005321b17ecSEdward Tomasz Napierala error = icl_pdu_finalize(request2); 1006321b17ecSEdward Tomasz Napierala if (error != 0) { 1007321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to finalize PDU; " 1008321b17ecSEdward Tomasz Napierala "dropping connection"); 10099a4510acSAlexander Motin icl_soft_pdu_done(request, EIO); 10109a4510acSAlexander Motin icl_soft_pdu_done(request2, EIO); 1011321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 1012321b17ecSEdward Tomasz Napierala return; 1013321b17ecSEdward Tomasz Napierala } 1014321b17ecSEdward Tomasz Napierala m_cat(request->ip_bhs_mbuf, request2->ip_bhs_mbuf); 1015321b17ecSEdward Tomasz Napierala request2->ip_bhs_mbuf = NULL; 1016321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf->m_pkthdr.len += size2; 1017321b17ecSEdward Tomasz Napierala size += size2; 1018321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_AFTER(queue, request, ip_next); 10199a4510acSAlexander Motin icl_soft_pdu_done(request2, 0); 1020321b17ecSEdward Tomasz Napierala coalesced++; 1021321b17ecSEdward Tomasz Napierala } 1022321b17ecSEdward Tomasz Napierala #if 0 1023321b17ecSEdward Tomasz Napierala if (coalesced > 1) { 1024605703b5SAlexander Motin ICL_DEBUG("coalesced %d PDUs into %ld bytes", 1025321b17ecSEdward Tomasz Napierala coalesced, size); 1026321b17ecSEdward Tomasz Napierala } 1027321b17ecSEdward Tomasz Napierala #endif 1028321b17ecSEdward Tomasz Napierala } 1029321b17ecSEdward Tomasz Napierala available -= size; 1030321b17ecSEdward Tomasz Napierala error = sosend(so, NULL, NULL, request->ip_bhs_mbuf, 1031321b17ecSEdward Tomasz Napierala NULL, MSG_DONTWAIT, curthread); 1032321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf = NULL; /* Sosend consumes the mbuf. */ 1033321b17ecSEdward Tomasz Napierala if (error != 0) { 1034321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to send PDU, error %d; " 1035321b17ecSEdward Tomasz Napierala "dropping connection", error); 10369a4510acSAlexander Motin icl_soft_pdu_done(request, error); 1037321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 1038321b17ecSEdward Tomasz Napierala return; 1039321b17ecSEdward Tomasz Napierala } 10409a4510acSAlexander Motin icl_soft_pdu_done(request, 0); 1041321b17ecSEdward Tomasz Napierala } 1042321b17ecSEdward Tomasz Napierala } 1043321b17ecSEdward Tomasz Napierala 1044321b17ecSEdward Tomasz Napierala static void 1045321b17ecSEdward Tomasz Napierala icl_send_thread(void *arg) 1046321b17ecSEdward Tomasz Napierala { 1047321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1048321b17ecSEdward Tomasz Napierala struct icl_pdu_stailq queue; 1049321b17ecSEdward Tomasz Napierala 1050321b17ecSEdward Tomasz Napierala ic = arg; 1051321b17ecSEdward Tomasz Napierala 1052321b17ecSEdward Tomasz Napierala STAILQ_INIT(&queue); 1053321b17ecSEdward Tomasz Napierala 1054321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1055321b17ecSEdward Tomasz Napierala for (;;) { 1056321b17ecSEdward Tomasz Napierala for (;;) { 1057321b17ecSEdward Tomasz Napierala /* 1058321b17ecSEdward Tomasz Napierala * If the local queue is empty, populate it from 1059321b17ecSEdward Tomasz Napierala * the main one. This way the icl_conn_send_pdus() 1060321b17ecSEdward Tomasz Napierala * can go through all the queued PDUs without holding 1061321b17ecSEdward Tomasz Napierala * any locks. 1062321b17ecSEdward Tomasz Napierala */ 1063321b17ecSEdward Tomasz Napierala if (STAILQ_EMPTY(&queue)) 1064321b17ecSEdward Tomasz Napierala STAILQ_SWAP(&ic->ic_to_send, &queue, icl_pdu); 1065321b17ecSEdward Tomasz Napierala 1066321b17ecSEdward Tomasz Napierala ic->ic_check_send_space = false; 1067321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1068321b17ecSEdward Tomasz Napierala icl_conn_send_pdus(ic, &queue); 1069321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1070321b17ecSEdward Tomasz Napierala 1071321b17ecSEdward Tomasz Napierala /* 1072321b17ecSEdward Tomasz Napierala * The icl_soupcall_send() was called since the last 1073321b17ecSEdward Tomasz Napierala * call to sbspace(); go around; 1074321b17ecSEdward Tomasz Napierala */ 1075321b17ecSEdward Tomasz Napierala if (ic->ic_check_send_space) 1076321b17ecSEdward Tomasz Napierala continue; 1077321b17ecSEdward Tomasz Napierala 1078321b17ecSEdward Tomasz Napierala /* 1079321b17ecSEdward Tomasz Napierala * Local queue is empty, but we still have PDUs 1080321b17ecSEdward Tomasz Napierala * in the main one; go around. 1081321b17ecSEdward Tomasz Napierala */ 1082321b17ecSEdward Tomasz Napierala if (STAILQ_EMPTY(&queue) && 1083321b17ecSEdward Tomasz Napierala !STAILQ_EMPTY(&ic->ic_to_send)) 1084321b17ecSEdward Tomasz Napierala continue; 1085321b17ecSEdward Tomasz Napierala 1086321b17ecSEdward Tomasz Napierala /* 1087321b17ecSEdward Tomasz Napierala * There might be some stuff in the local queue, 1088321b17ecSEdward Tomasz Napierala * which didn't get sent due to not having enough send 1089321b17ecSEdward Tomasz Napierala * space. Wait for socket upcall. 1090321b17ecSEdward Tomasz Napierala */ 1091321b17ecSEdward Tomasz Napierala break; 1092321b17ecSEdward Tomasz Napierala } 1093321b17ecSEdward Tomasz Napierala 1094321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) { 1095321b17ecSEdward Tomasz Napierala //ICL_DEBUG("terminating"); 1096321b17ecSEdward Tomasz Napierala break; 1097321b17ecSEdward Tomasz Napierala } 1098321b17ecSEdward Tomasz Napierala 1099321b17ecSEdward Tomasz Napierala cv_wait(&ic->ic_send_cv, ic->ic_lock); 1100321b17ecSEdward Tomasz Napierala } 1101321b17ecSEdward Tomasz Napierala 1102321b17ecSEdward Tomasz Napierala /* 1103321b17ecSEdward Tomasz Napierala * We're exiting; move PDUs back to the main queue, so they can 1104321b17ecSEdward Tomasz Napierala * get freed properly. At this point ordering doesn't matter. 1105321b17ecSEdward Tomasz Napierala */ 1106321b17ecSEdward Tomasz Napierala STAILQ_CONCAT(&ic->ic_to_send, &queue); 1107321b17ecSEdward Tomasz Napierala 1108321b17ecSEdward Tomasz Napierala ic->ic_send_running = false; 1109321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1110321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1111321b17ecSEdward Tomasz Napierala kthread_exit(); 1112321b17ecSEdward Tomasz Napierala } 1113321b17ecSEdward Tomasz Napierala 1114321b17ecSEdward Tomasz Napierala static int 1115321b17ecSEdward Tomasz Napierala icl_soupcall_send(struct socket *so, void *arg, int waitflag) 1116321b17ecSEdward Tomasz Napierala { 1117321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1118321b17ecSEdward Tomasz Napierala 1119321b17ecSEdward Tomasz Napierala if (!sowriteable(so)) 1120321b17ecSEdward Tomasz Napierala return (SU_OK); 1121321b17ecSEdward Tomasz Napierala 1122321b17ecSEdward Tomasz Napierala ic = arg; 1123321b17ecSEdward Tomasz Napierala 1124321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1125321b17ecSEdward Tomasz Napierala ic->ic_check_send_space = true; 1126321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1127321b17ecSEdward Tomasz Napierala 1128321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1129321b17ecSEdward Tomasz Napierala 1130321b17ecSEdward Tomasz Napierala return (SU_OK); 1131321b17ecSEdward Tomasz Napierala } 1132321b17ecSEdward Tomasz Napierala 1133321b17ecSEdward Tomasz Napierala static int 113482f7fa7aSAlexander Motin icl_soft_conn_pdu_append_data(struct icl_conn *ic, struct icl_pdu *request, 113582f7fa7aSAlexander Motin const void *addr, size_t len, int flags) 1136321b17ecSEdward Tomasz Napierala { 11379a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)request; 1138321b17ecSEdward Tomasz Napierala struct mbuf *mb, *newmb; 1139321b17ecSEdward Tomasz Napierala size_t copylen, off = 0; 1140321b17ecSEdward Tomasz Napierala 1141321b17ecSEdward Tomasz Napierala KASSERT(len > 0, ("len == 0")); 1142321b17ecSEdward Tomasz Napierala 11439a4510acSAlexander Motin if (flags & ICL_NOCOPY) { 11449a4510acSAlexander Motin newmb = m_get(flags & ~ICL_NOCOPY, MT_DATA); 11459a4510acSAlexander Motin if (newmb == NULL) { 11469a4510acSAlexander Motin ICL_WARN("failed to allocate mbuf"); 11479a4510acSAlexander Motin return (ENOMEM); 11489a4510acSAlexander Motin } 11499a4510acSAlexander Motin 11509a4510acSAlexander Motin newmb->m_flags |= M_RDONLY; 11519a4510acSAlexander Motin m_extaddref(newmb, __DECONST(char *, addr), len, &isp->ref_cnt, 11529a4510acSAlexander Motin icl_soft_mbuf_done, isp, NULL); 11539a4510acSAlexander Motin newmb->m_len = len; 11549a4510acSAlexander Motin } else { 1155898fd11fSAlexander Motin newmb = m_getm2(NULL, len, flags, MT_DATA, 0); 1156321b17ecSEdward Tomasz Napierala if (newmb == NULL) { 1157321b17ecSEdward Tomasz Napierala ICL_WARN("failed to allocate mbuf for %zd bytes", len); 1158321b17ecSEdward Tomasz Napierala return (ENOMEM); 1159321b17ecSEdward Tomasz Napierala } 1160321b17ecSEdward Tomasz Napierala 1161321b17ecSEdward Tomasz Napierala for (mb = newmb; mb != NULL; mb = mb->m_next) { 1162321b17ecSEdward Tomasz Napierala copylen = min(M_TRAILINGSPACE(mb), len - off); 1163321b17ecSEdward Tomasz Napierala memcpy(mtod(mb, char *), (const char *)addr + off, copylen); 1164321b17ecSEdward Tomasz Napierala mb->m_len = copylen; 1165321b17ecSEdward Tomasz Napierala off += copylen; 1166321b17ecSEdward Tomasz Napierala } 1167321b17ecSEdward Tomasz Napierala KASSERT(off == len, ("%s: off != len", __func__)); 11689a4510acSAlexander Motin } 1169321b17ecSEdward Tomasz Napierala 1170321b17ecSEdward Tomasz Napierala if (request->ip_data_mbuf == NULL) { 1171321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = newmb; 1172321b17ecSEdward Tomasz Napierala request->ip_data_len = len; 1173321b17ecSEdward Tomasz Napierala } else { 1174321b17ecSEdward Tomasz Napierala m_cat(request->ip_data_mbuf, newmb); 1175321b17ecSEdward Tomasz Napierala request->ip_data_len += len; 1176321b17ecSEdward Tomasz Napierala } 1177321b17ecSEdward Tomasz Napierala 1178321b17ecSEdward Tomasz Napierala return (0); 1179321b17ecSEdward Tomasz Napierala } 1180321b17ecSEdward Tomasz Napierala 1181321b17ecSEdward Tomasz Napierala void 1182321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_get_data(struct icl_conn *ic, struct icl_pdu *ip, 1183321b17ecSEdward Tomasz Napierala size_t off, void *addr, size_t len) 1184321b17ecSEdward Tomasz Napierala { 1185321b17ecSEdward Tomasz Napierala 118682f7fa7aSAlexander Motin m_copydata(ip->ip_data_mbuf, off, len, addr); 1187321b17ecSEdward Tomasz Napierala } 1188321b17ecSEdward Tomasz Napierala 1189321b17ecSEdward Tomasz Napierala static void 11909a4510acSAlexander Motin icl_soft_conn_pdu_queue(struct icl_conn *ic, struct icl_pdu *ip) 1191321b17ecSEdward Tomasz Napierala { 1192321b17ecSEdward Tomasz Napierala 11939a4510acSAlexander Motin icl_soft_conn_pdu_queue_cb(ic, ip, NULL); 11949a4510acSAlexander Motin } 11959a4510acSAlexander Motin 11969a4510acSAlexander Motin static void 11979a4510acSAlexander Motin icl_soft_conn_pdu_queue_cb(struct icl_conn *ic, struct icl_pdu *ip, 11989a4510acSAlexander Motin icl_pdu_cb cb) 11999a4510acSAlexander Motin { 12009a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 1201321b17ecSEdward Tomasz Napierala 1202321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT(ic); 12039a4510acSAlexander Motin isp->ref_cnt++; 12049a4510acSAlexander Motin isp->cb = cb; 1205321b17ecSEdward Tomasz Napierala 1206321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting || ic->ic_socket == NULL) { 1207321b17ecSEdward Tomasz Napierala ICL_DEBUG("icl_pdu_queue on closed connection"); 12089a4510acSAlexander Motin icl_soft_pdu_done(ip, ENOTCONN); 1209321b17ecSEdward Tomasz Napierala return; 1210321b17ecSEdward Tomasz Napierala } 1211321b17ecSEdward Tomasz Napierala 1212321b17ecSEdward Tomasz Napierala if (!STAILQ_EMPTY(&ic->ic_to_send)) { 1213321b17ecSEdward Tomasz Napierala STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next); 1214321b17ecSEdward Tomasz Napierala /* 1215321b17ecSEdward Tomasz Napierala * If the queue is not empty, someone else had already 1216321b17ecSEdward Tomasz Napierala * signaled the send thread; no need to do that again, 1217321b17ecSEdward Tomasz Napierala * just return. 1218321b17ecSEdward Tomasz Napierala */ 1219321b17ecSEdward Tomasz Napierala return; 1220321b17ecSEdward Tomasz Napierala } 1221321b17ecSEdward Tomasz Napierala 1222321b17ecSEdward Tomasz Napierala STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next); 1223321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1224321b17ecSEdward Tomasz Napierala } 1225321b17ecSEdward Tomasz Napierala 1226321b17ecSEdward Tomasz Napierala static struct icl_conn * 1227321b17ecSEdward Tomasz Napierala icl_soft_new_conn(const char *name, struct mtx *lock) 1228321b17ecSEdward Tomasz Napierala { 1229321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1230321b17ecSEdward Tomasz Napierala 1231321b17ecSEdward Tomasz Napierala refcount_acquire(&icl_ncons); 1232321b17ecSEdward Tomasz Napierala 1233321b17ecSEdward Tomasz Napierala ic = (struct icl_conn *)kobj_create(&icl_soft_class, M_ICL_SOFT, M_WAITOK | M_ZERO); 1234321b17ecSEdward Tomasz Napierala 1235321b17ecSEdward Tomasz Napierala STAILQ_INIT(&ic->ic_to_send); 1236321b17ecSEdward Tomasz Napierala ic->ic_lock = lock; 1237321b17ecSEdward Tomasz Napierala cv_init(&ic->ic_send_cv, "icl_tx"); 1238321b17ecSEdward Tomasz Napierala cv_init(&ic->ic_receive_cv, "icl_rx"); 1239321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 1240321b17ecSEdward Tomasz Napierala refcount_init(&ic->ic_outstanding_pdus, 0); 1241321b17ecSEdward Tomasz Napierala #endif 1242*b75168edSAlexander Motin ic->ic_max_data_segment_length = max_data_segment_length; 1243321b17ecSEdward Tomasz Napierala ic->ic_name = name; 1244d4b195d3SEdward Tomasz Napierala ic->ic_offload = "None"; 12457deb68abSEdward Tomasz Napierala ic->ic_unmapped = false; 1246321b17ecSEdward Tomasz Napierala 1247321b17ecSEdward Tomasz Napierala return (ic); 1248321b17ecSEdward Tomasz Napierala } 1249321b17ecSEdward Tomasz Napierala 1250321b17ecSEdward Tomasz Napierala void 1251321b17ecSEdward Tomasz Napierala icl_soft_conn_free(struct icl_conn *ic) 1252321b17ecSEdward Tomasz Napierala { 1253321b17ecSEdward Tomasz Napierala 125422d3bb26SEdward Tomasz Napierala #ifdef DIAGNOSTIC 125522d3bb26SEdward Tomasz Napierala KASSERT(ic->ic_outstanding_pdus == 0, 125622d3bb26SEdward Tomasz Napierala ("destroying session with %d outstanding PDUs", 125722d3bb26SEdward Tomasz Napierala ic->ic_outstanding_pdus)); 125822d3bb26SEdward Tomasz Napierala #endif 1259321b17ecSEdward Tomasz Napierala cv_destroy(&ic->ic_send_cv); 1260321b17ecSEdward Tomasz Napierala cv_destroy(&ic->ic_receive_cv); 1261321b17ecSEdward Tomasz Napierala kobj_delete((struct kobj *)ic, M_ICL_SOFT); 1262321b17ecSEdward Tomasz Napierala refcount_release(&icl_ncons); 1263321b17ecSEdward Tomasz Napierala } 1264321b17ecSEdward Tomasz Napierala 1265321b17ecSEdward Tomasz Napierala static int 1266321b17ecSEdward Tomasz Napierala icl_conn_start(struct icl_conn *ic) 1267321b17ecSEdward Tomasz Napierala { 1268321b17ecSEdward Tomasz Napierala size_t minspace; 1269321b17ecSEdward Tomasz Napierala struct sockopt opt; 1270321b17ecSEdward Tomasz Napierala int error, one = 1; 1271321b17ecSEdward Tomasz Napierala 1272321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1273321b17ecSEdward Tomasz Napierala 1274321b17ecSEdward Tomasz Napierala /* 1275321b17ecSEdward Tomasz Napierala * XXX: Ugly hack. 1276321b17ecSEdward Tomasz Napierala */ 1277321b17ecSEdward Tomasz Napierala if (ic->ic_socket == NULL) { 1278321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1279321b17ecSEdward Tomasz Napierala return (EINVAL); 1280321b17ecSEdward Tomasz Napierala } 1281321b17ecSEdward Tomasz Napierala 1282321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_BHS; 1283321b17ecSEdward Tomasz Napierala ic->ic_receive_len = sizeof(struct iscsi_bhs); 1284321b17ecSEdward Tomasz Napierala ic->ic_disconnecting = false; 1285321b17ecSEdward Tomasz Napierala 1286321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1287321b17ecSEdward Tomasz Napierala 1288321b17ecSEdward Tomasz Napierala /* 1289321b17ecSEdward Tomasz Napierala * For sendspace, this is required because the current code cannot 1290321b17ecSEdward Tomasz Napierala * send a PDU in pieces; thus, the minimum buffer size is equal 1291321b17ecSEdward Tomasz Napierala * to the maximum PDU size. "+4" is to account for possible padding. 1292321b17ecSEdward Tomasz Napierala */ 1293321b17ecSEdward Tomasz Napierala minspace = sizeof(struct iscsi_bhs) + ic->ic_max_data_segment_length + 1294321b17ecSEdward Tomasz Napierala ISCSI_HEADER_DIGEST_SIZE + ISCSI_DATA_DIGEST_SIZE + 4; 1295321b17ecSEdward Tomasz Napierala if (sendspace < minspace) { 1296321b17ecSEdward Tomasz Napierala ICL_WARN("kern.icl.sendspace too low; must be at least %zd", 1297321b17ecSEdward Tomasz Napierala minspace); 1298321b17ecSEdward Tomasz Napierala sendspace = minspace; 1299321b17ecSEdward Tomasz Napierala } 1300321b17ecSEdward Tomasz Napierala if (recvspace < minspace) { 1301321b17ecSEdward Tomasz Napierala ICL_WARN("kern.icl.recvspace too low; must be at least %zd", 1302321b17ecSEdward Tomasz Napierala minspace); 1303321b17ecSEdward Tomasz Napierala recvspace = minspace; 1304321b17ecSEdward Tomasz Napierala } 1305321b17ecSEdward Tomasz Napierala 1306321b17ecSEdward Tomasz Napierala error = soreserve(ic->ic_socket, sendspace, recvspace); 1307321b17ecSEdward Tomasz Napierala if (error != 0) { 1308321b17ecSEdward Tomasz Napierala ICL_WARN("soreserve failed with error %d", error); 13095aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(ic); 1310321b17ecSEdward Tomasz Napierala return (error); 1311321b17ecSEdward Tomasz Napierala } 1312321b17ecSEdward Tomasz Napierala ic->ic_socket->so_snd.sb_flags |= SB_AUTOSIZE; 1313321b17ecSEdward Tomasz Napierala ic->ic_socket->so_rcv.sb_flags |= SB_AUTOSIZE; 1314321b17ecSEdward Tomasz Napierala 1315321b17ecSEdward Tomasz Napierala /* 1316321b17ecSEdward Tomasz Napierala * Disable Nagle. 1317321b17ecSEdward Tomasz Napierala */ 1318321b17ecSEdward Tomasz Napierala bzero(&opt, sizeof(opt)); 1319321b17ecSEdward Tomasz Napierala opt.sopt_dir = SOPT_SET; 1320321b17ecSEdward Tomasz Napierala opt.sopt_level = IPPROTO_TCP; 1321321b17ecSEdward Tomasz Napierala opt.sopt_name = TCP_NODELAY; 1322321b17ecSEdward Tomasz Napierala opt.sopt_val = &one; 1323321b17ecSEdward Tomasz Napierala opt.sopt_valsize = sizeof(one); 1324321b17ecSEdward Tomasz Napierala error = sosetopt(ic->ic_socket, &opt); 1325321b17ecSEdward Tomasz Napierala if (error != 0) { 1326321b17ecSEdward Tomasz Napierala ICL_WARN("disabling TCP_NODELAY failed with error %d", error); 13275aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(ic); 1328321b17ecSEdward Tomasz Napierala return (error); 1329321b17ecSEdward Tomasz Napierala } 1330321b17ecSEdward Tomasz Napierala 1331321b17ecSEdward Tomasz Napierala /* 1332321b17ecSEdward Tomasz Napierala * Register socket upcall, to get notified about incoming PDUs 1333321b17ecSEdward Tomasz Napierala * and free space to send outgoing ones. 1334321b17ecSEdward Tomasz Napierala */ 1335321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&ic->ic_socket->so_snd); 1336321b17ecSEdward Tomasz Napierala soupcall_set(ic->ic_socket, SO_SND, icl_soupcall_send, ic); 1337321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&ic->ic_socket->so_snd); 1338321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&ic->ic_socket->so_rcv); 1339321b17ecSEdward Tomasz Napierala soupcall_set(ic->ic_socket, SO_RCV, icl_soupcall_receive, ic); 1340321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&ic->ic_socket->so_rcv); 1341321b17ecSEdward Tomasz Napierala 13425b157f21SAlexander Motin /* 13435b157f21SAlexander Motin * Start threads. 13445b157f21SAlexander Motin */ 13455b157f21SAlexander Motin ICL_CONN_LOCK(ic); 13465b157f21SAlexander Motin ic->ic_send_running = ic->ic_receive_running = true; 13475b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 13485b157f21SAlexander Motin error = kthread_add(icl_send_thread, ic, NULL, NULL, 0, 0, "%stx", 13495b157f21SAlexander Motin ic->ic_name); 13505b157f21SAlexander Motin if (error != 0) { 13515b157f21SAlexander Motin ICL_WARN("kthread_add(9) failed with error %d", error); 13525b157f21SAlexander Motin ICL_CONN_LOCK(ic); 13535b157f21SAlexander Motin ic->ic_send_running = ic->ic_receive_running = false; 13545b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 13555b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 13565b157f21SAlexander Motin icl_soft_conn_close(ic); 13575b157f21SAlexander Motin return (error); 13585b157f21SAlexander Motin } 13595b157f21SAlexander Motin error = kthread_add(icl_receive_thread, ic, NULL, NULL, 0, 0, "%srx", 13605b157f21SAlexander Motin ic->ic_name); 13615b157f21SAlexander Motin if (error != 0) { 13625b157f21SAlexander Motin ICL_WARN("kthread_add(9) failed with error %d", error); 13635b157f21SAlexander Motin ICL_CONN_LOCK(ic); 13645b157f21SAlexander Motin ic->ic_receive_running = false; 13655b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 13665b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 13675b157f21SAlexander Motin icl_soft_conn_close(ic); 13685b157f21SAlexander Motin return (error); 13695b157f21SAlexander Motin } 13705b157f21SAlexander Motin 1371321b17ecSEdward Tomasz Napierala return (0); 1372321b17ecSEdward Tomasz Napierala } 1373321b17ecSEdward Tomasz Napierala 1374321b17ecSEdward Tomasz Napierala int 1375321b17ecSEdward Tomasz Napierala icl_soft_conn_handoff(struct icl_conn *ic, int fd) 1376321b17ecSEdward Tomasz Napierala { 1377321b17ecSEdward Tomasz Napierala struct file *fp; 1378321b17ecSEdward Tomasz Napierala struct socket *so; 1379321b17ecSEdward Tomasz Napierala cap_rights_t rights; 1380321b17ecSEdward Tomasz Napierala int error; 1381321b17ecSEdward Tomasz Napierala 1382321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 1383321b17ecSEdward Tomasz Napierala 1384906a424bSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 1385906a424bSEdward Tomasz Napierala /* 1386906a424bSEdward Tomasz Napierala * We're transitioning to Full Feature phase, and we don't 1387906a424bSEdward Tomasz Napierala * really care. 1388906a424bSEdward Tomasz Napierala */ 1389906a424bSEdward Tomasz Napierala if (fd == 0) { 1390906a424bSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1391906a424bSEdward Tomasz Napierala if (ic->ic_socket == NULL) { 1392906a424bSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1393906a424bSEdward Tomasz Napierala ICL_WARN("proxy handoff without connect"); 1394906a424bSEdward Tomasz Napierala return (EINVAL); 1395906a424bSEdward Tomasz Napierala } 1396906a424bSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1397906a424bSEdward Tomasz Napierala return (0); 1398906a424bSEdward Tomasz Napierala } 1399906a424bSEdward Tomasz Napierala #endif 1400906a424bSEdward Tomasz Napierala 1401321b17ecSEdward Tomasz Napierala /* 1402321b17ecSEdward Tomasz Napierala * Steal the socket from userland. 1403321b17ecSEdward Tomasz Napierala */ 1404321b17ecSEdward Tomasz Napierala error = fget(curthread, fd, 14056b3a9a0fSMateusz Guzik cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp); 1406321b17ecSEdward Tomasz Napierala if (error != 0) 1407321b17ecSEdward Tomasz Napierala return (error); 1408321b17ecSEdward Tomasz Napierala if (fp->f_type != DTYPE_SOCKET) { 1409321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1410321b17ecSEdward Tomasz Napierala return (EINVAL); 1411321b17ecSEdward Tomasz Napierala } 1412321b17ecSEdward Tomasz Napierala so = fp->f_data; 1413321b17ecSEdward Tomasz Napierala if (so->so_type != SOCK_STREAM) { 1414321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1415321b17ecSEdward Tomasz Napierala return (EINVAL); 1416321b17ecSEdward Tomasz Napierala } 1417321b17ecSEdward Tomasz Napierala 1418321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1419321b17ecSEdward Tomasz Napierala 1420321b17ecSEdward Tomasz Napierala if (ic->ic_socket != NULL) { 1421321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1422321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1423321b17ecSEdward Tomasz Napierala return (EBUSY); 1424321b17ecSEdward Tomasz Napierala } 1425321b17ecSEdward Tomasz Napierala 1426321b17ecSEdward Tomasz Napierala ic->ic_socket = fp->f_data; 1427321b17ecSEdward Tomasz Napierala fp->f_ops = &badfileops; 1428321b17ecSEdward Tomasz Napierala fp->f_data = NULL; 1429321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1430321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1431321b17ecSEdward Tomasz Napierala 1432321b17ecSEdward Tomasz Napierala error = icl_conn_start(ic); 1433321b17ecSEdward Tomasz Napierala 1434321b17ecSEdward Tomasz Napierala return (error); 1435321b17ecSEdward Tomasz Napierala } 1436321b17ecSEdward Tomasz Napierala 1437321b17ecSEdward Tomasz Napierala void 14385aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(struct icl_conn *ic) 1439321b17ecSEdward Tomasz Napierala { 1440321b17ecSEdward Tomasz Napierala struct icl_pdu *pdu; 14415b157f21SAlexander Motin struct socket *so; 1442321b17ecSEdward Tomasz Napierala 1443321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 14445b157f21SAlexander Motin 14455b157f21SAlexander Motin /* 14465b157f21SAlexander Motin * Wake up the threads, so they can properly terminate. 14475b157f21SAlexander Motin */ 14485b157f21SAlexander Motin ic->ic_disconnecting = true; 14495b157f21SAlexander Motin while (ic->ic_receive_running || ic->ic_send_running) { 14505b157f21SAlexander Motin cv_signal(&ic->ic_receive_cv); 14515b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 14525b157f21SAlexander Motin cv_wait(&ic->ic_send_cv, ic->ic_lock); 14535b157f21SAlexander Motin } 14545b157f21SAlexander Motin 14555b157f21SAlexander Motin /* Some other thread could close the connection same time. */ 14565b157f21SAlexander Motin so = ic->ic_socket; 14575b157f21SAlexander Motin if (so == NULL) { 1458321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1459321b17ecSEdward Tomasz Napierala return; 1460321b17ecSEdward Tomasz Napierala } 14615b157f21SAlexander Motin ic->ic_socket = NULL; 1462321b17ecSEdward Tomasz Napierala 1463321b17ecSEdward Tomasz Napierala /* 1464321b17ecSEdward Tomasz Napierala * Deregister socket upcalls. 1465321b17ecSEdward Tomasz Napierala */ 1466321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 14675b157f21SAlexander Motin SOCKBUF_LOCK(&so->so_snd); 14685b157f21SAlexander Motin if (so->so_snd.sb_upcall != NULL) 14695b157f21SAlexander Motin soupcall_clear(so, SO_SND); 14705b157f21SAlexander Motin SOCKBUF_UNLOCK(&so->so_snd); 14715b157f21SAlexander Motin SOCKBUF_LOCK(&so->so_rcv); 14725b157f21SAlexander Motin if (so->so_rcv.sb_upcall != NULL) 14735b157f21SAlexander Motin soupcall_clear(so, SO_RCV); 14745b157f21SAlexander Motin SOCKBUF_UNLOCK(&so->so_rcv); 14755b157f21SAlexander Motin soclose(so); 1476321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1477321b17ecSEdward Tomasz Napierala 1478321b17ecSEdward Tomasz Napierala if (ic->ic_receive_pdu != NULL) { 1479321b17ecSEdward Tomasz Napierala //ICL_DEBUG("freeing partially received PDU"); 148082f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ic->ic_receive_pdu); 1481321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = NULL; 1482321b17ecSEdward Tomasz Napierala } 1483321b17ecSEdward Tomasz Napierala 1484321b17ecSEdward Tomasz Napierala /* 1485321b17ecSEdward Tomasz Napierala * Remove any outstanding PDUs from the send queue. 1486321b17ecSEdward Tomasz Napierala */ 1487321b17ecSEdward Tomasz Napierala while (!STAILQ_EMPTY(&ic->ic_to_send)) { 1488321b17ecSEdward Tomasz Napierala pdu = STAILQ_FIRST(&ic->ic_to_send); 1489321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(&ic->ic_to_send, ip_next); 14909a4510acSAlexander Motin icl_soft_pdu_done(pdu, ENOTCONN); 1491321b17ecSEdward Tomasz Napierala } 1492321b17ecSEdward Tomasz Napierala 1493321b17ecSEdward Tomasz Napierala KASSERT(STAILQ_EMPTY(&ic->ic_to_send), 1494321b17ecSEdward Tomasz Napierala ("destroying session with non-empty send queue")); 1495321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1496321b17ecSEdward Tomasz Napierala } 1497321b17ecSEdward Tomasz Napierala 14987a03d007SEdward Tomasz Napierala int 1499604c023fSEdward Tomasz Napierala icl_soft_conn_task_setup(struct icl_conn *ic, struct icl_pdu *ip, 1500604c023fSEdward Tomasz Napierala struct ccb_scsiio *csio, uint32_t *task_tagp, void **prvp) 15017a03d007SEdward Tomasz Napierala { 15027a03d007SEdward Tomasz Napierala 15037a03d007SEdward Tomasz Napierala return (0); 15047a03d007SEdward Tomasz Napierala } 15057a03d007SEdward Tomasz Napierala 15067a03d007SEdward Tomasz Napierala void 15077a03d007SEdward Tomasz Napierala icl_soft_conn_task_done(struct icl_conn *ic, void *prv) 15087a03d007SEdward Tomasz Napierala { 15097a03d007SEdward Tomasz Napierala } 15107a03d007SEdward Tomasz Napierala 15117a03d007SEdward Tomasz Napierala int 15127a03d007SEdward Tomasz Napierala icl_soft_conn_transfer_setup(struct icl_conn *ic, union ctl_io *io, 15137a03d007SEdward Tomasz Napierala uint32_t *transfer_tag, void **prvp) 15147a03d007SEdward Tomasz Napierala { 15157a03d007SEdward Tomasz Napierala 15167a03d007SEdward Tomasz Napierala return (0); 15177a03d007SEdward Tomasz Napierala } 15187a03d007SEdward Tomasz Napierala 15197a03d007SEdward Tomasz Napierala void 15207a03d007SEdward Tomasz Napierala icl_soft_conn_transfer_done(struct icl_conn *ic, void *prv) 15217a03d007SEdward Tomasz Napierala { 15227a03d007SEdward Tomasz Napierala } 15237a03d007SEdward Tomasz Napierala 1524321b17ecSEdward Tomasz Napierala static int 152597b84d34SNavdeep Parhar icl_soft_limits(struct icl_drv_limits *idl) 1526321b17ecSEdward Tomasz Napierala { 1527321b17ecSEdward Tomasz Napierala 1528*b75168edSAlexander Motin idl->idl_max_recv_data_segment_length = max_data_segment_length; 1529*b75168edSAlexander Motin idl->idl_max_send_data_segment_length = max_data_segment_length; 1530*b75168edSAlexander Motin idl->idl_max_burst_length = max_burst_length; 1531*b75168edSAlexander Motin idl->idl_first_burst_length = first_burst_length; 1532321b17ecSEdward Tomasz Napierala 1533321b17ecSEdward Tomasz Napierala return (0); 1534321b17ecSEdward Tomasz Napierala } 1535321b17ecSEdward Tomasz Napierala 1536321b17ecSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 1537321b17ecSEdward Tomasz Napierala int 1538f41492b0SEdward Tomasz Napierala icl_soft_conn_connect(struct icl_conn *ic, int domain, int socktype, 1539f41492b0SEdward Tomasz Napierala int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa) 1540f41492b0SEdward Tomasz Napierala { 1541f41492b0SEdward Tomasz Napierala 1542f41492b0SEdward Tomasz Napierala return (icl_soft_proxy_connect(ic, domain, socktype, protocol, 1543f41492b0SEdward Tomasz Napierala from_sa, to_sa)); 1544f41492b0SEdward Tomasz Napierala } 1545f41492b0SEdward Tomasz Napierala 1546f41492b0SEdward Tomasz Napierala int 1547f41492b0SEdward Tomasz Napierala icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so) 1548321b17ecSEdward Tomasz Napierala { 1549321b17ecSEdward Tomasz Napierala int error; 1550321b17ecSEdward Tomasz Napierala 1551321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 1552321b17ecSEdward Tomasz Napierala 1553321b17ecSEdward Tomasz Napierala if (so->so_type != SOCK_STREAM) 1554321b17ecSEdward Tomasz Napierala return (EINVAL); 1555321b17ecSEdward Tomasz Napierala 1556321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1557321b17ecSEdward Tomasz Napierala if (ic->ic_socket != NULL) { 1558321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1559321b17ecSEdward Tomasz Napierala return (EBUSY); 1560321b17ecSEdward Tomasz Napierala } 1561321b17ecSEdward Tomasz Napierala ic->ic_socket = so; 1562321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1563321b17ecSEdward Tomasz Napierala 1564321b17ecSEdward Tomasz Napierala error = icl_conn_start(ic); 1565321b17ecSEdward Tomasz Napierala 1566321b17ecSEdward Tomasz Napierala return (error); 1567321b17ecSEdward Tomasz Napierala } 1568321b17ecSEdward Tomasz Napierala #endif /* ICL_KERNEL_PROXY */ 1569321b17ecSEdward Tomasz Napierala 1570321b17ecSEdward Tomasz Napierala static int 1571321b17ecSEdward Tomasz Napierala icl_soft_load(void) 1572321b17ecSEdward Tomasz Napierala { 1573321b17ecSEdward Tomasz Napierala int error; 1574321b17ecSEdward Tomasz Napierala 15759a4510acSAlexander Motin icl_soft_pdu_zone = uma_zcreate("icl_soft_pdu", 15769a4510acSAlexander Motin sizeof(struct icl_soft_pdu), NULL, NULL, NULL, NULL, 1577321b17ecSEdward Tomasz Napierala UMA_ALIGN_PTR, 0); 1578321b17ecSEdward Tomasz Napierala refcount_init(&icl_ncons, 0); 1579321b17ecSEdward Tomasz Napierala 1580321b17ecSEdward Tomasz Napierala /* 1581321b17ecSEdward Tomasz Napierala * The reason we call this "none" is that to the user, 1582321b17ecSEdward Tomasz Napierala * it's known as "offload driver"; "offload driver: soft" 1583321b17ecSEdward Tomasz Napierala * doesn't make much sense. 1584321b17ecSEdward Tomasz Napierala */ 1585b8911594SEdward Tomasz Napierala error = icl_register("none", false, 0, 1586b8911594SEdward Tomasz Napierala icl_soft_limits, icl_soft_new_conn); 1587321b17ecSEdward Tomasz Napierala KASSERT(error == 0, ("failed to register")); 1588321b17ecSEdward Tomasz Napierala 1589b8911594SEdward Tomasz Napierala #if defined(ICL_KERNEL_PROXY) && 0 1590b8911594SEdward Tomasz Napierala /* 1591b8911594SEdward Tomasz Napierala * Debugging aid for kernel proxy functionality. 1592b8911594SEdward Tomasz Napierala */ 1593b8911594SEdward Tomasz Napierala error = icl_register("proxytest", true, 0, 1594b8911594SEdward Tomasz Napierala icl_soft_limits, icl_soft_new_conn); 1595b8911594SEdward Tomasz Napierala KASSERT(error == 0, ("failed to register")); 1596b8911594SEdward Tomasz Napierala #endif 1597b8911594SEdward Tomasz Napierala 1598321b17ecSEdward Tomasz Napierala return (error); 1599321b17ecSEdward Tomasz Napierala } 1600321b17ecSEdward Tomasz Napierala 1601321b17ecSEdward Tomasz Napierala static int 1602321b17ecSEdward Tomasz Napierala icl_soft_unload(void) 1603321b17ecSEdward Tomasz Napierala { 1604321b17ecSEdward Tomasz Napierala 1605321b17ecSEdward Tomasz Napierala if (icl_ncons != 0) 1606321b17ecSEdward Tomasz Napierala return (EBUSY); 1607321b17ecSEdward Tomasz Napierala 1608b8911594SEdward Tomasz Napierala icl_unregister("none", false); 1609b8911594SEdward Tomasz Napierala #if defined(ICL_KERNEL_PROXY) && 0 1610b8911594SEdward Tomasz Napierala icl_unregister("proxytest", true); 1611b8911594SEdward Tomasz Napierala #endif 1612321b17ecSEdward Tomasz Napierala 16139a4510acSAlexander Motin uma_zdestroy(icl_soft_pdu_zone); 1614321b17ecSEdward Tomasz Napierala 1615321b17ecSEdward Tomasz Napierala return (0); 1616321b17ecSEdward Tomasz Napierala } 1617321b17ecSEdward Tomasz Napierala 1618321b17ecSEdward Tomasz Napierala static int 1619321b17ecSEdward Tomasz Napierala icl_soft_modevent(module_t mod, int what, void *arg) 1620321b17ecSEdward Tomasz Napierala { 1621321b17ecSEdward Tomasz Napierala 1622321b17ecSEdward Tomasz Napierala switch (what) { 1623321b17ecSEdward Tomasz Napierala case MOD_LOAD: 1624321b17ecSEdward Tomasz Napierala return (icl_soft_load()); 1625321b17ecSEdward Tomasz Napierala case MOD_UNLOAD: 1626321b17ecSEdward Tomasz Napierala return (icl_soft_unload()); 1627321b17ecSEdward Tomasz Napierala default: 1628321b17ecSEdward Tomasz Napierala return (EINVAL); 1629321b17ecSEdward Tomasz Napierala } 1630321b17ecSEdward Tomasz Napierala } 1631321b17ecSEdward Tomasz Napierala 1632321b17ecSEdward Tomasz Napierala moduledata_t icl_soft_data = { 1633321b17ecSEdward Tomasz Napierala "icl_soft", 1634321b17ecSEdward Tomasz Napierala icl_soft_modevent, 1635321b17ecSEdward Tomasz Napierala 0 1636321b17ecSEdward Tomasz Napierala }; 1637321b17ecSEdward Tomasz Napierala 1638321b17ecSEdward Tomasz Napierala DECLARE_MODULE(icl_soft, icl_soft_data, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 1639321b17ecSEdward Tomasz Napierala MODULE_DEPEND(icl_soft, icl, 1, 1, 1); 1640872d2d92SEdward Tomasz Napierala MODULE_VERSION(icl_soft, 1); 1641