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 75321b17ecSEdward Tomasz Napierala static int coalesce = 1; 76321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, coalesce, CTLFLAG_RWTUN, 77321b17ecSEdward Tomasz Napierala &coalesce, 0, "Try to coalesce PDUs before sending"); 78321b17ecSEdward Tomasz Napierala static int partial_receive_len = 128 * 1024; 79321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, partial_receive_len, CTLFLAG_RWTUN, 80321b17ecSEdward Tomasz Napierala &partial_receive_len, 0, "Minimum read size for partially received " 81321b17ecSEdward Tomasz Napierala "data segment"); 82321b17ecSEdward Tomasz Napierala static int sendspace = 1048576; 83321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, sendspace, CTLFLAG_RWTUN, 84321b17ecSEdward Tomasz Napierala &sendspace, 0, "Default send socket buffer size"); 85321b17ecSEdward Tomasz Napierala static int recvspace = 1048576; 86321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, recvspace, CTLFLAG_RWTUN, 87321b17ecSEdward Tomasz Napierala &recvspace, 0, "Default receive socket buffer size"); 88321b17ecSEdward Tomasz Napierala 89321b17ecSEdward Tomasz Napierala static MALLOC_DEFINE(M_ICL_SOFT, "icl_soft", "iSCSI software backend"); 909a4510acSAlexander Motin static uma_zone_t icl_soft_pdu_zone; 91321b17ecSEdward Tomasz Napierala 92321b17ecSEdward Tomasz Napierala static volatile u_int icl_ncons; 93321b17ecSEdward Tomasz Napierala 94321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK(X) mtx_lock(X->ic_lock) 95321b17ecSEdward Tomasz Napierala #define ICL_CONN_UNLOCK(X) mtx_unlock(X->ic_lock) 96321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK_ASSERT(X) mtx_assert(X->ic_lock, MA_OWNED) 97321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK_ASSERT_NOT(X) mtx_assert(X->ic_lock, MA_NOTOWNED) 98321b17ecSEdward Tomasz Napierala 99321b17ecSEdward Tomasz Napierala STAILQ_HEAD(icl_pdu_stailq, icl_pdu); 100321b17ecSEdward Tomasz Napierala 101321b17ecSEdward Tomasz Napierala static icl_conn_new_pdu_t icl_soft_conn_new_pdu; 102321b17ecSEdward Tomasz Napierala static icl_conn_pdu_free_t icl_soft_conn_pdu_free; 103321b17ecSEdward Tomasz Napierala static icl_conn_pdu_data_segment_length_t 104321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length; 105321b17ecSEdward Tomasz Napierala static icl_conn_pdu_append_data_t icl_soft_conn_pdu_append_data; 106321b17ecSEdward Tomasz Napierala static icl_conn_pdu_get_data_t icl_soft_conn_pdu_get_data; 107321b17ecSEdward Tomasz Napierala static icl_conn_pdu_queue_t icl_soft_conn_pdu_queue; 1089a4510acSAlexander Motin static icl_conn_pdu_queue_cb_t icl_soft_conn_pdu_queue_cb; 109321b17ecSEdward Tomasz Napierala static icl_conn_handoff_t icl_soft_conn_handoff; 110321b17ecSEdward Tomasz Napierala static icl_conn_free_t icl_soft_conn_free; 111321b17ecSEdward Tomasz Napierala static icl_conn_close_t icl_soft_conn_close; 1127a03d007SEdward Tomasz Napierala static icl_conn_task_setup_t icl_soft_conn_task_setup; 1137a03d007SEdward Tomasz Napierala static icl_conn_task_done_t icl_soft_conn_task_done; 1147a03d007SEdward Tomasz Napierala static icl_conn_transfer_setup_t icl_soft_conn_transfer_setup; 1157a03d007SEdward Tomasz Napierala static icl_conn_transfer_done_t icl_soft_conn_transfer_done; 116f41492b0SEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 117f41492b0SEdward Tomasz Napierala static icl_conn_connect_t icl_soft_conn_connect; 118f41492b0SEdward Tomasz Napierala #endif 119321b17ecSEdward Tomasz Napierala 120321b17ecSEdward Tomasz Napierala static kobj_method_t icl_soft_methods[] = { 121321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_new_pdu, icl_soft_conn_new_pdu), 122321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_free, icl_soft_conn_pdu_free), 123321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_data_segment_length, 124321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length), 125321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_append_data, icl_soft_conn_pdu_append_data), 126321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_get_data, icl_soft_conn_pdu_get_data), 127321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_queue, icl_soft_conn_pdu_queue), 1289a4510acSAlexander Motin KOBJMETHOD(icl_conn_pdu_queue_cb, icl_soft_conn_pdu_queue_cb), 129321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_handoff, icl_soft_conn_handoff), 130321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_free, icl_soft_conn_free), 131321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_close, icl_soft_conn_close), 1327a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_task_setup, icl_soft_conn_task_setup), 1337a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_task_done, icl_soft_conn_task_done), 1347a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_transfer_setup, icl_soft_conn_transfer_setup), 1357a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_transfer_done, icl_soft_conn_transfer_done), 136f41492b0SEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 137f41492b0SEdward Tomasz Napierala KOBJMETHOD(icl_conn_connect, icl_soft_conn_connect), 138f41492b0SEdward Tomasz Napierala #endif 139321b17ecSEdward Tomasz Napierala { 0, 0 } 140321b17ecSEdward Tomasz Napierala }; 141321b17ecSEdward Tomasz Napierala 142321b17ecSEdward Tomasz Napierala DEFINE_CLASS(icl_soft, icl_soft_methods, sizeof(struct icl_conn)); 143321b17ecSEdward Tomasz Napierala 144321b17ecSEdward Tomasz Napierala static void 145321b17ecSEdward Tomasz Napierala icl_conn_fail(struct icl_conn *ic) 146321b17ecSEdward Tomasz Napierala { 147321b17ecSEdward Tomasz Napierala if (ic->ic_socket == NULL) 148321b17ecSEdward Tomasz Napierala return; 149321b17ecSEdward Tomasz Napierala 150321b17ecSEdward Tomasz Napierala /* 151321b17ecSEdward Tomasz Napierala * XXX 152321b17ecSEdward Tomasz Napierala */ 153321b17ecSEdward Tomasz Napierala ic->ic_socket->so_error = EDOOFUS; 154321b17ecSEdward Tomasz Napierala (ic->ic_error)(ic); 155321b17ecSEdward Tomasz Napierala } 156321b17ecSEdward Tomasz Napierala 157321b17ecSEdward Tomasz Napierala static struct mbuf * 158321b17ecSEdward Tomasz Napierala icl_conn_receive(struct icl_conn *ic, size_t len) 159321b17ecSEdward Tomasz Napierala { 160321b17ecSEdward Tomasz Napierala struct uio uio; 161321b17ecSEdward Tomasz Napierala struct socket *so; 162321b17ecSEdward Tomasz Napierala struct mbuf *m; 163321b17ecSEdward Tomasz Napierala int error, flags; 164321b17ecSEdward Tomasz Napierala 165321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 166321b17ecSEdward Tomasz Napierala 167321b17ecSEdward Tomasz Napierala memset(&uio, 0, sizeof(uio)); 168321b17ecSEdward Tomasz Napierala uio.uio_resid = len; 169321b17ecSEdward Tomasz Napierala 170321b17ecSEdward Tomasz Napierala flags = MSG_DONTWAIT; 171321b17ecSEdward Tomasz Napierala error = soreceive(so, NULL, &uio, &m, NULL, &flags); 172321b17ecSEdward Tomasz Napierala if (error != 0) { 173321b17ecSEdward Tomasz Napierala ICL_DEBUG("soreceive error %d", error); 174321b17ecSEdward Tomasz Napierala return (NULL); 175321b17ecSEdward Tomasz Napierala } 176321b17ecSEdward Tomasz Napierala if (uio.uio_resid != 0) { 177321b17ecSEdward Tomasz Napierala m_freem(m); 178321b17ecSEdward Tomasz Napierala ICL_DEBUG("short read"); 179321b17ecSEdward Tomasz Napierala return (NULL); 180321b17ecSEdward Tomasz Napierala } 181321b17ecSEdward Tomasz Napierala 182321b17ecSEdward Tomasz Napierala return (m); 183321b17ecSEdward Tomasz Napierala } 184321b17ecSEdward Tomasz Napierala 185d0d587c7SAlexander Motin static int 186d0d587c7SAlexander Motin icl_conn_receive_buf(struct icl_conn *ic, void *buf, size_t len) 187d0d587c7SAlexander Motin { 188d0d587c7SAlexander Motin struct iovec iov[1]; 189d0d587c7SAlexander Motin struct uio uio; 190d0d587c7SAlexander Motin struct socket *so; 191d0d587c7SAlexander Motin int error, flags; 192d0d587c7SAlexander Motin 193d0d587c7SAlexander Motin so = ic->ic_socket; 194d0d587c7SAlexander Motin 195d0d587c7SAlexander Motin memset(&uio, 0, sizeof(uio)); 196d0d587c7SAlexander Motin iov[0].iov_base = buf; 197d0d587c7SAlexander Motin iov[0].iov_len = len; 198d0d587c7SAlexander Motin uio.uio_iov = iov; 199d0d587c7SAlexander Motin uio.uio_iovcnt = 1; 200d0d587c7SAlexander Motin uio.uio_offset = 0; 201d0d587c7SAlexander Motin uio.uio_resid = len; 202d0d587c7SAlexander Motin uio.uio_segflg = UIO_SYSSPACE; 203d0d587c7SAlexander Motin uio.uio_rw = UIO_READ; 204d0d587c7SAlexander Motin 205d0d587c7SAlexander Motin flags = MSG_DONTWAIT; 206d0d587c7SAlexander Motin error = soreceive(so, NULL, &uio, NULL, NULL, &flags); 207d0d587c7SAlexander Motin if (error != 0) { 208d0d587c7SAlexander Motin ICL_DEBUG("soreceive error %d", error); 209d0d587c7SAlexander Motin return (-1); 210d0d587c7SAlexander Motin } 211d0d587c7SAlexander Motin if (uio.uio_resid != 0) { 212d0d587c7SAlexander Motin ICL_DEBUG("short read"); 213d0d587c7SAlexander Motin return (-1); 214d0d587c7SAlexander Motin } 215d0d587c7SAlexander Motin 216d0d587c7SAlexander Motin return (0); 217d0d587c7SAlexander Motin } 218d0d587c7SAlexander Motin 21982f7fa7aSAlexander Motin static void 22082f7fa7aSAlexander Motin icl_soft_conn_pdu_free(struct icl_conn *ic, struct icl_pdu *ip) 22182f7fa7aSAlexander Motin { 2229a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 22382f7fa7aSAlexander Motin 2249a4510acSAlexander Motin KASSERT(isp->ref_cnt == 0, ("freeing active PDU")); 22582f7fa7aSAlexander Motin m_freem(ip->ip_bhs_mbuf); 22682f7fa7aSAlexander Motin m_freem(ip->ip_ahs_mbuf); 22782f7fa7aSAlexander Motin m_freem(ip->ip_data_mbuf); 2289a4510acSAlexander Motin uma_zfree(icl_soft_pdu_zone, isp); 22982f7fa7aSAlexander Motin #ifdef DIAGNOSTIC 23082f7fa7aSAlexander Motin refcount_release(&ic->ic_outstanding_pdus); 23182f7fa7aSAlexander Motin #endif 23282f7fa7aSAlexander Motin } 23382f7fa7aSAlexander Motin 2349a4510acSAlexander Motin static void 2359a4510acSAlexander Motin icl_soft_pdu_call_cb(struct icl_pdu *ip) 2369a4510acSAlexander Motin { 2379a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 2389a4510acSAlexander Motin 2399a4510acSAlexander Motin if (isp->cb != NULL) 2409a4510acSAlexander Motin isp->cb(ip, isp->error); 2419a4510acSAlexander Motin #ifdef DIAGNOSTIC 2429a4510acSAlexander Motin refcount_release(&ip->ip_conn->ic_outstanding_pdus); 2439a4510acSAlexander Motin #endif 2449a4510acSAlexander Motin uma_zfree(icl_soft_pdu_zone, isp); 2459a4510acSAlexander Motin } 2469a4510acSAlexander Motin 2479a4510acSAlexander Motin static void 2489a4510acSAlexander Motin icl_soft_pdu_done(struct icl_pdu *ip, int error) 2499a4510acSAlexander Motin { 2509a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 2519a4510acSAlexander Motin 2529a4510acSAlexander Motin if (error != 0) 2539a4510acSAlexander Motin isp->error = error; 2549a4510acSAlexander Motin 2559a4510acSAlexander Motin m_freem(ip->ip_bhs_mbuf); 2569a4510acSAlexander Motin ip->ip_bhs_mbuf = NULL; 2579a4510acSAlexander Motin m_freem(ip->ip_ahs_mbuf); 2589a4510acSAlexander Motin ip->ip_ahs_mbuf = NULL; 2599a4510acSAlexander Motin m_freem(ip->ip_data_mbuf); 2609a4510acSAlexander Motin ip->ip_data_mbuf = NULL; 2619a4510acSAlexander Motin 2629a4510acSAlexander Motin if (atomic_fetchadd_int(&isp->ref_cnt, -1) == 1) 2639a4510acSAlexander Motin icl_soft_pdu_call_cb(ip); 2649a4510acSAlexander Motin } 2659a4510acSAlexander Motin 2669a4510acSAlexander Motin static void 2679a4510acSAlexander Motin icl_soft_mbuf_done(struct mbuf *mb) 2689a4510acSAlexander Motin { 2699a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)mb->m_ext.ext_arg1; 2709a4510acSAlexander Motin 2719a4510acSAlexander Motin icl_soft_pdu_call_cb(&isp->ip); 2729a4510acSAlexander Motin } 2739a4510acSAlexander Motin 27482f7fa7aSAlexander Motin /* 27582f7fa7aSAlexander Motin * Allocate icl_pdu with empty BHS to fill up by the caller. 27682f7fa7aSAlexander Motin */ 27782f7fa7aSAlexander Motin struct icl_pdu * 27882f7fa7aSAlexander Motin icl_soft_conn_new_pdu(struct icl_conn *ic, int flags) 279321b17ecSEdward Tomasz Napierala { 2809a4510acSAlexander Motin struct icl_soft_pdu *isp; 281321b17ecSEdward Tomasz Napierala struct icl_pdu *ip; 282321b17ecSEdward Tomasz Napierala 283321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 284321b17ecSEdward Tomasz Napierala refcount_acquire(&ic->ic_outstanding_pdus); 285321b17ecSEdward Tomasz Napierala #endif 2869a4510acSAlexander Motin isp = uma_zalloc(icl_soft_pdu_zone, flags | M_ZERO); 2879a4510acSAlexander Motin if (isp == NULL) { 2889a4510acSAlexander Motin ICL_WARN("failed to allocate soft PDU"); 289321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 290321b17ecSEdward Tomasz Napierala refcount_release(&ic->ic_outstanding_pdus); 291321b17ecSEdward Tomasz Napierala #endif 292321b17ecSEdward Tomasz Napierala return (NULL); 293321b17ecSEdward Tomasz Napierala } 2949a4510acSAlexander Motin ip = &isp->ip; 295321b17ecSEdward Tomasz Napierala ip->ip_conn = ic; 296321b17ecSEdward Tomasz Napierala 29733d9db92SAlexander Motin CTASSERT(sizeof(struct iscsi_bhs) <= MHLEN); 29833d9db92SAlexander Motin ip->ip_bhs_mbuf = m_gethdr(flags, MT_DATA); 299321b17ecSEdward Tomasz Napierala if (ip->ip_bhs_mbuf == NULL) { 300d0d587c7SAlexander Motin ICL_WARN("failed to allocate BHS mbuf"); 30182f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ip); 302321b17ecSEdward Tomasz Napierala return (NULL); 303321b17ecSEdward Tomasz Napierala } 304321b17ecSEdward Tomasz Napierala ip->ip_bhs = mtod(ip->ip_bhs_mbuf, struct iscsi_bhs *); 305321b17ecSEdward Tomasz Napierala memset(ip->ip_bhs, 0, sizeof(struct iscsi_bhs)); 306321b17ecSEdward Tomasz Napierala ip->ip_bhs_mbuf->m_len = sizeof(struct iscsi_bhs); 307321b17ecSEdward Tomasz Napierala 308321b17ecSEdward Tomasz Napierala return (ip); 309321b17ecSEdward Tomasz Napierala } 310321b17ecSEdward Tomasz Napierala 311321b17ecSEdward Tomasz Napierala static int 312321b17ecSEdward Tomasz Napierala icl_pdu_ahs_length(const struct icl_pdu *request) 313321b17ecSEdward Tomasz Napierala { 314321b17ecSEdward Tomasz Napierala 315321b17ecSEdward Tomasz Napierala return (request->ip_bhs->bhs_total_ahs_len * 4); 316321b17ecSEdward Tomasz Napierala } 317321b17ecSEdward Tomasz Napierala 318321b17ecSEdward Tomasz Napierala static size_t 319321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_length(const struct icl_pdu *request) 320321b17ecSEdward Tomasz Napierala { 321321b17ecSEdward Tomasz Napierala uint32_t len = 0; 322321b17ecSEdward Tomasz Napierala 323321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[0]; 324321b17ecSEdward Tomasz Napierala len <<= 8; 325321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[1]; 326321b17ecSEdward Tomasz Napierala len <<= 8; 327321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[2]; 328321b17ecSEdward Tomasz Napierala 329321b17ecSEdward Tomasz Napierala return (len); 330321b17ecSEdward Tomasz Napierala } 331321b17ecSEdward Tomasz Napierala 332321b17ecSEdward Tomasz Napierala size_t 333321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length(struct icl_conn *ic, 334321b17ecSEdward Tomasz Napierala const struct icl_pdu *request) 335321b17ecSEdward Tomasz Napierala { 336321b17ecSEdward Tomasz Napierala 337321b17ecSEdward Tomasz Napierala return (icl_pdu_data_segment_length(request)); 338321b17ecSEdward Tomasz Napierala } 339321b17ecSEdward Tomasz Napierala 340321b17ecSEdward Tomasz Napierala static void 341321b17ecSEdward Tomasz Napierala icl_pdu_set_data_segment_length(struct icl_pdu *response, uint32_t len) 342321b17ecSEdward Tomasz Napierala { 343321b17ecSEdward Tomasz Napierala 344321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[2] = len; 345321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[1] = len >> 8; 346321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[0] = len >> 16; 347321b17ecSEdward Tomasz Napierala } 348321b17ecSEdward Tomasz Napierala 349321b17ecSEdward Tomasz Napierala static size_t 350321b17ecSEdward Tomasz Napierala icl_pdu_padding(const struct icl_pdu *ip) 351321b17ecSEdward Tomasz Napierala { 352321b17ecSEdward Tomasz Napierala 353321b17ecSEdward Tomasz Napierala if ((ip->ip_data_len % 4) != 0) 354321b17ecSEdward Tomasz Napierala return (4 - (ip->ip_data_len % 4)); 355321b17ecSEdward Tomasz Napierala 356321b17ecSEdward Tomasz Napierala return (0); 357321b17ecSEdward Tomasz Napierala } 358321b17ecSEdward Tomasz Napierala 359321b17ecSEdward Tomasz Napierala static size_t 360321b17ecSEdward Tomasz Napierala icl_pdu_size(const struct icl_pdu *response) 361321b17ecSEdward Tomasz Napierala { 362321b17ecSEdward Tomasz Napierala size_t len; 363321b17ecSEdward Tomasz Napierala 364321b17ecSEdward Tomasz Napierala KASSERT(response->ip_ahs_len == 0, ("responding with AHS")); 365321b17ecSEdward Tomasz Napierala 366321b17ecSEdward Tomasz Napierala len = sizeof(struct iscsi_bhs) + response->ip_data_len + 367321b17ecSEdward Tomasz Napierala icl_pdu_padding(response); 368321b17ecSEdward Tomasz Napierala if (response->ip_conn->ic_header_crc32c) 369321b17ecSEdward Tomasz Napierala len += ISCSI_HEADER_DIGEST_SIZE; 370321b17ecSEdward Tomasz Napierala if (response->ip_data_len != 0 && response->ip_conn->ic_data_crc32c) 371321b17ecSEdward Tomasz Napierala len += ISCSI_DATA_DIGEST_SIZE; 372321b17ecSEdward Tomasz Napierala 373321b17ecSEdward Tomasz Napierala return (len); 374321b17ecSEdward Tomasz Napierala } 375321b17ecSEdward Tomasz Napierala 376321b17ecSEdward Tomasz Napierala static int 377321b17ecSEdward Tomasz Napierala icl_pdu_receive_bhs(struct icl_pdu *request, size_t *availablep) 378321b17ecSEdward Tomasz Napierala { 379321b17ecSEdward Tomasz Napierala 380d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 381d0d587c7SAlexander Motin request->ip_bhs, sizeof(struct iscsi_bhs))) { 382321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive BHS"); 383321b17ecSEdward Tomasz Napierala return (-1); 384321b17ecSEdward Tomasz Napierala } 385321b17ecSEdward Tomasz Napierala 386321b17ecSEdward Tomasz Napierala *availablep -= sizeof(struct iscsi_bhs); 387321b17ecSEdward Tomasz Napierala return (0); 388321b17ecSEdward Tomasz Napierala } 389321b17ecSEdward Tomasz Napierala 390321b17ecSEdward Tomasz Napierala static int 391321b17ecSEdward Tomasz Napierala icl_pdu_receive_ahs(struct icl_pdu *request, size_t *availablep) 392321b17ecSEdward Tomasz Napierala { 393321b17ecSEdward Tomasz Napierala 394321b17ecSEdward Tomasz Napierala request->ip_ahs_len = icl_pdu_ahs_length(request); 395321b17ecSEdward Tomasz Napierala if (request->ip_ahs_len == 0) 396321b17ecSEdward Tomasz Napierala return (0); 397321b17ecSEdward Tomasz Napierala 398321b17ecSEdward Tomasz Napierala request->ip_ahs_mbuf = icl_conn_receive(request->ip_conn, 399321b17ecSEdward Tomasz Napierala request->ip_ahs_len); 400321b17ecSEdward Tomasz Napierala if (request->ip_ahs_mbuf == NULL) { 401321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive AHS"); 402321b17ecSEdward Tomasz Napierala return (-1); 403321b17ecSEdward Tomasz Napierala } 404321b17ecSEdward Tomasz Napierala 405321b17ecSEdward Tomasz Napierala *availablep -= request->ip_ahs_len; 406321b17ecSEdward Tomasz Napierala return (0); 407321b17ecSEdward Tomasz Napierala } 408321b17ecSEdward Tomasz Napierala 409321b17ecSEdward Tomasz Napierala static uint32_t 410321b17ecSEdward Tomasz Napierala icl_mbuf_to_crc32c(const struct mbuf *m0) 411321b17ecSEdward Tomasz Napierala { 412321b17ecSEdward Tomasz Napierala uint32_t digest = 0xffffffff; 413321b17ecSEdward Tomasz Napierala const struct mbuf *m; 414321b17ecSEdward Tomasz Napierala 415321b17ecSEdward Tomasz Napierala for (m = m0; m != NULL; m = m->m_next) 416321b17ecSEdward Tomasz Napierala digest = calculate_crc32c(digest, 417321b17ecSEdward Tomasz Napierala mtod(m, const void *), m->m_len); 418321b17ecSEdward Tomasz Napierala 419321b17ecSEdward Tomasz Napierala digest = digest ^ 0xffffffff; 420321b17ecSEdward Tomasz Napierala 421321b17ecSEdward Tomasz Napierala return (digest); 422321b17ecSEdward Tomasz Napierala } 423321b17ecSEdward Tomasz Napierala 424321b17ecSEdward Tomasz Napierala static int 425321b17ecSEdward Tomasz Napierala icl_pdu_check_header_digest(struct icl_pdu *request, size_t *availablep) 426321b17ecSEdward Tomasz Napierala { 427321b17ecSEdward Tomasz Napierala uint32_t received_digest, valid_digest; 428321b17ecSEdward Tomasz Napierala 429321b17ecSEdward Tomasz Napierala if (request->ip_conn->ic_header_crc32c == false) 430321b17ecSEdward Tomasz Napierala return (0); 431321b17ecSEdward Tomasz Napierala 432d0d587c7SAlexander Motin CTASSERT(sizeof(received_digest) == ISCSI_HEADER_DIGEST_SIZE); 433d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 434d0d587c7SAlexander Motin &received_digest, ISCSI_HEADER_DIGEST_SIZE)) { 435321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive header digest"); 436321b17ecSEdward Tomasz Napierala return (-1); 437321b17ecSEdward Tomasz Napierala } 438321b17ecSEdward Tomasz Napierala *availablep -= ISCSI_HEADER_DIGEST_SIZE; 439321b17ecSEdward Tomasz Napierala 440875ac6cfSAlexander Motin /* Temporary attach AHS to BHS to calculate header digest. */ 441875ac6cfSAlexander Motin request->ip_bhs_mbuf->m_next = request->ip_ahs_mbuf; 442321b17ecSEdward Tomasz Napierala valid_digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf); 443875ac6cfSAlexander Motin request->ip_bhs_mbuf->m_next = NULL; 444321b17ecSEdward Tomasz Napierala if (received_digest != valid_digest) { 445321b17ecSEdward Tomasz Napierala ICL_WARN("header digest check failed; got 0x%x, " 446321b17ecSEdward Tomasz Napierala "should be 0x%x", received_digest, valid_digest); 447321b17ecSEdward Tomasz Napierala return (-1); 448321b17ecSEdward Tomasz Napierala } 449321b17ecSEdward Tomasz Napierala 450321b17ecSEdward Tomasz Napierala return (0); 451321b17ecSEdward Tomasz Napierala } 452321b17ecSEdward Tomasz Napierala 453321b17ecSEdward Tomasz Napierala /* 454321b17ecSEdward Tomasz Napierala * Return the number of bytes that should be waiting in the receive socket 455321b17ecSEdward Tomasz Napierala * before icl_pdu_receive_data_segment() gets called. 456321b17ecSEdward Tomasz Napierala */ 457321b17ecSEdward Tomasz Napierala static size_t 458321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(const struct icl_pdu *request) 459321b17ecSEdward Tomasz Napierala { 460321b17ecSEdward Tomasz Napierala size_t len; 461321b17ecSEdward Tomasz Napierala 462321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 463321b17ecSEdward Tomasz Napierala if (len == 0) 464321b17ecSEdward Tomasz Napierala return (0); 465321b17ecSEdward Tomasz Napierala 466321b17ecSEdward Tomasz Napierala /* 467321b17ecSEdward Tomasz Napierala * Account for the parts of data segment already read from 468321b17ecSEdward Tomasz Napierala * the socket buffer. 469321b17ecSEdward Tomasz Napierala */ 470321b17ecSEdward Tomasz Napierala KASSERT(len > request->ip_data_len, ("len <= request->ip_data_len")); 471321b17ecSEdward Tomasz Napierala len -= request->ip_data_len; 472321b17ecSEdward Tomasz Napierala 473321b17ecSEdward Tomasz Napierala /* 474321b17ecSEdward Tomasz Napierala * Don't always wait for the full data segment to be delivered 475321b17ecSEdward Tomasz Napierala * to the socket; this might badly affect performance due to 476321b17ecSEdward Tomasz Napierala * TCP window scaling. 477321b17ecSEdward Tomasz Napierala */ 478321b17ecSEdward Tomasz Napierala if (len > partial_receive_len) { 479321b17ecSEdward Tomasz Napierala #if 0 480321b17ecSEdward Tomasz Napierala ICL_DEBUG("need %zd bytes of data, limiting to %zd", 481321b17ecSEdward Tomasz Napierala len, partial_receive_len)); 482321b17ecSEdward Tomasz Napierala #endif 483321b17ecSEdward Tomasz Napierala len = partial_receive_len; 484321b17ecSEdward Tomasz Napierala 485321b17ecSEdward Tomasz Napierala return (len); 486321b17ecSEdward Tomasz Napierala } 487321b17ecSEdward Tomasz Napierala 488321b17ecSEdward Tomasz Napierala /* 489321b17ecSEdward Tomasz Napierala * Account for padding. Note that due to the way code is written, 490321b17ecSEdward Tomasz Napierala * the icl_pdu_receive_data_segment() must always receive padding 491321b17ecSEdward Tomasz Napierala * along with the last part of data segment, because it would be 492321b17ecSEdward Tomasz Napierala * impossible to tell whether we've already received the full data 493321b17ecSEdward Tomasz Napierala * segment including padding, or without it. 494321b17ecSEdward Tomasz Napierala */ 495321b17ecSEdward Tomasz Napierala if ((len % 4) != 0) 496321b17ecSEdward Tomasz Napierala len += 4 - (len % 4); 497321b17ecSEdward Tomasz Napierala 498321b17ecSEdward Tomasz Napierala #if 0 499321b17ecSEdward Tomasz Napierala ICL_DEBUG("need %zd bytes of data", len)); 500321b17ecSEdward Tomasz Napierala #endif 501321b17ecSEdward Tomasz Napierala 502321b17ecSEdward Tomasz Napierala return (len); 503321b17ecSEdward Tomasz Napierala } 504321b17ecSEdward Tomasz Napierala 505321b17ecSEdward Tomasz Napierala static int 506321b17ecSEdward Tomasz Napierala icl_pdu_receive_data_segment(struct icl_pdu *request, 507321b17ecSEdward Tomasz Napierala size_t *availablep, bool *more_neededp) 508321b17ecSEdward Tomasz Napierala { 509321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 510321b17ecSEdward Tomasz Napierala size_t len, padding = 0; 511321b17ecSEdward Tomasz Napierala struct mbuf *m; 512321b17ecSEdward Tomasz Napierala 513321b17ecSEdward Tomasz Napierala ic = request->ip_conn; 514321b17ecSEdward Tomasz Napierala 515321b17ecSEdward Tomasz Napierala *more_neededp = false; 516321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 517321b17ecSEdward Tomasz Napierala 518321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 519321b17ecSEdward Tomasz Napierala if (len == 0) 520321b17ecSEdward Tomasz Napierala return (0); 521321b17ecSEdward Tomasz Napierala 522321b17ecSEdward Tomasz Napierala if ((len % 4) != 0) 523321b17ecSEdward Tomasz Napierala padding = 4 - (len % 4); 524321b17ecSEdward Tomasz Napierala 525321b17ecSEdward Tomasz Napierala /* 526321b17ecSEdward Tomasz Napierala * Account for already received parts of data segment. 527321b17ecSEdward Tomasz Napierala */ 528321b17ecSEdward Tomasz Napierala KASSERT(len > request->ip_data_len, ("len <= request->ip_data_len")); 529321b17ecSEdward Tomasz Napierala len -= request->ip_data_len; 530321b17ecSEdward Tomasz Napierala 531321b17ecSEdward Tomasz Napierala if (len + padding > *availablep) { 532321b17ecSEdward Tomasz Napierala /* 533321b17ecSEdward Tomasz Napierala * Not enough data in the socket buffer. Receive as much 534321b17ecSEdward Tomasz Napierala * as we can. Don't receive padding, since, obviously, it's 535321b17ecSEdward Tomasz Napierala * not the end of data segment yet. 536321b17ecSEdward Tomasz Napierala */ 537321b17ecSEdward Tomasz Napierala #if 0 538321b17ecSEdward Tomasz Napierala ICL_DEBUG("limited from %zd to %zd", 539321b17ecSEdward Tomasz Napierala len + padding, *availablep - padding)); 540321b17ecSEdward Tomasz Napierala #endif 541321b17ecSEdward Tomasz Napierala len = *availablep - padding; 542321b17ecSEdward Tomasz Napierala *more_neededp = true; 543321b17ecSEdward Tomasz Napierala padding = 0; 544321b17ecSEdward Tomasz Napierala } 545321b17ecSEdward Tomasz Napierala 546321b17ecSEdward Tomasz Napierala /* 547321b17ecSEdward Tomasz Napierala * Must not try to receive padding without at least one byte 548321b17ecSEdward Tomasz Napierala * of actual data segment. 549321b17ecSEdward Tomasz Napierala */ 550321b17ecSEdward Tomasz Napierala if (len > 0) { 551321b17ecSEdward Tomasz Napierala m = icl_conn_receive(request->ip_conn, len + padding); 552321b17ecSEdward Tomasz Napierala if (m == NULL) { 553321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data segment"); 554321b17ecSEdward Tomasz Napierala return (-1); 555321b17ecSEdward Tomasz Napierala } 556321b17ecSEdward Tomasz Napierala 557321b17ecSEdward Tomasz Napierala if (request->ip_data_mbuf == NULL) 558321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = m; 559321b17ecSEdward Tomasz Napierala else 560321b17ecSEdward Tomasz Napierala m_cat(request->ip_data_mbuf, m); 561321b17ecSEdward Tomasz Napierala 562321b17ecSEdward Tomasz Napierala request->ip_data_len += len; 563321b17ecSEdward Tomasz Napierala *availablep -= len + padding; 564321b17ecSEdward Tomasz Napierala } else 565321b17ecSEdward Tomasz Napierala ICL_DEBUG("len 0"); 566321b17ecSEdward Tomasz Napierala 567321b17ecSEdward Tomasz Napierala if (*more_neededp) 568321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 569321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(request); 570321b17ecSEdward Tomasz Napierala 571321b17ecSEdward Tomasz Napierala return (0); 572321b17ecSEdward Tomasz Napierala } 573321b17ecSEdward Tomasz Napierala 574321b17ecSEdward Tomasz Napierala static int 575321b17ecSEdward Tomasz Napierala icl_pdu_check_data_digest(struct icl_pdu *request, size_t *availablep) 576321b17ecSEdward Tomasz Napierala { 577321b17ecSEdward Tomasz Napierala uint32_t received_digest, valid_digest; 578321b17ecSEdward Tomasz Napierala 579321b17ecSEdward Tomasz Napierala if (request->ip_conn->ic_data_crc32c == false) 580321b17ecSEdward Tomasz Napierala return (0); 581321b17ecSEdward Tomasz Napierala 582321b17ecSEdward Tomasz Napierala if (request->ip_data_len == 0) 583321b17ecSEdward Tomasz Napierala return (0); 584321b17ecSEdward Tomasz Napierala 585d0d587c7SAlexander Motin CTASSERT(sizeof(received_digest) == ISCSI_DATA_DIGEST_SIZE); 586d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 587d0d587c7SAlexander Motin &received_digest, ISCSI_DATA_DIGEST_SIZE)) { 588321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data digest"); 589321b17ecSEdward Tomasz Napierala return (-1); 590321b17ecSEdward Tomasz Napierala } 591321b17ecSEdward Tomasz Napierala *availablep -= ISCSI_DATA_DIGEST_SIZE; 592321b17ecSEdward Tomasz Napierala 593321b17ecSEdward Tomasz Napierala /* 594321b17ecSEdward Tomasz Napierala * Note that ip_data_mbuf also contains padding; since digest 595321b17ecSEdward Tomasz Napierala * calculation is supposed to include that, we iterate over 596321b17ecSEdward Tomasz Napierala * the entire ip_data_mbuf chain, not just ip_data_len bytes of it. 597321b17ecSEdward Tomasz Napierala */ 598321b17ecSEdward Tomasz Napierala valid_digest = icl_mbuf_to_crc32c(request->ip_data_mbuf); 599321b17ecSEdward Tomasz Napierala if (received_digest != valid_digest) { 600321b17ecSEdward Tomasz Napierala ICL_WARN("data digest check failed; got 0x%x, " 601321b17ecSEdward Tomasz Napierala "should be 0x%x", received_digest, valid_digest); 602321b17ecSEdward Tomasz Napierala return (-1); 603321b17ecSEdward Tomasz Napierala } 604321b17ecSEdward Tomasz Napierala 605321b17ecSEdward Tomasz Napierala return (0); 606321b17ecSEdward Tomasz Napierala } 607321b17ecSEdward Tomasz Napierala 608321b17ecSEdward Tomasz Napierala /* 609321b17ecSEdward Tomasz Napierala * Somewhat contrary to the name, this attempts to receive only one 610321b17ecSEdward Tomasz Napierala * "part" of PDU at a time; call it repeatedly until it returns non-NULL. 611321b17ecSEdward Tomasz Napierala */ 612321b17ecSEdward Tomasz Napierala static struct icl_pdu * 613321b17ecSEdward Tomasz Napierala icl_conn_receive_pdu(struct icl_conn *ic, size_t *availablep) 614321b17ecSEdward Tomasz Napierala { 615321b17ecSEdward Tomasz Napierala struct icl_pdu *request; 616321b17ecSEdward Tomasz Napierala struct socket *so; 617321b17ecSEdward Tomasz Napierala size_t len; 618321b17ecSEdward Tomasz Napierala int error; 619321b17ecSEdward Tomasz Napierala bool more_needed; 620321b17ecSEdward Tomasz Napierala 621321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 622321b17ecSEdward Tomasz Napierala 623321b17ecSEdward Tomasz Napierala if (ic->ic_receive_state == ICL_CONN_STATE_BHS) { 624321b17ecSEdward Tomasz Napierala KASSERT(ic->ic_receive_pdu == NULL, 625321b17ecSEdward Tomasz Napierala ("ic->ic_receive_pdu != NULL")); 626d0d587c7SAlexander Motin request = icl_soft_conn_new_pdu(ic, M_NOWAIT); 627321b17ecSEdward Tomasz Napierala if (request == NULL) { 628321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to allocate PDU; " 629321b17ecSEdward Tomasz Napierala "dropping connection"); 630321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 631321b17ecSEdward Tomasz Napierala return (NULL); 632321b17ecSEdward Tomasz Napierala } 633321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = request; 634321b17ecSEdward Tomasz Napierala } else { 635321b17ecSEdward Tomasz Napierala KASSERT(ic->ic_receive_pdu != NULL, 636321b17ecSEdward Tomasz Napierala ("ic->ic_receive_pdu == NULL")); 637321b17ecSEdward Tomasz Napierala request = ic->ic_receive_pdu; 638321b17ecSEdward Tomasz Napierala } 639321b17ecSEdward Tomasz Napierala 640321b17ecSEdward Tomasz Napierala if (*availablep < ic->ic_receive_len) { 641321b17ecSEdward Tomasz Napierala #if 0 642321b17ecSEdward Tomasz Napierala ICL_DEBUG("not enough data; need %zd, " 643321b17ecSEdward Tomasz Napierala "have %zd", ic->ic_receive_len, *availablep); 644321b17ecSEdward Tomasz Napierala #endif 645321b17ecSEdward Tomasz Napierala return (NULL); 646321b17ecSEdward Tomasz Napierala } 647321b17ecSEdward Tomasz Napierala 648321b17ecSEdward Tomasz Napierala switch (ic->ic_receive_state) { 649321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_BHS: 650321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving BHS"); 651321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_bhs(request, availablep); 652321b17ecSEdward Tomasz Napierala if (error != 0) { 653321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive BHS; " 654321b17ecSEdward Tomasz Napierala "dropping connection"); 655321b17ecSEdward Tomasz Napierala break; 656321b17ecSEdward Tomasz Napierala } 657321b17ecSEdward Tomasz Napierala 658321b17ecSEdward Tomasz Napierala /* 659321b17ecSEdward Tomasz Napierala * We don't enforce any limit for AHS length; 660321b17ecSEdward Tomasz Napierala * its length is stored in 8 bit field. 661321b17ecSEdward Tomasz Napierala */ 662321b17ecSEdward Tomasz Napierala 663321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 664321b17ecSEdward Tomasz Napierala if (len > ic->ic_max_data_segment_length) { 665321b17ecSEdward Tomasz Napierala ICL_WARN("received data segment " 666321b17ecSEdward Tomasz Napierala "length %zd is larger than negotiated " 667321b17ecSEdward Tomasz Napierala "MaxDataSegmentLength %zd; " 668321b17ecSEdward Tomasz Napierala "dropping connection", 669321b17ecSEdward Tomasz Napierala len, ic->ic_max_data_segment_length); 670321b17ecSEdward Tomasz Napierala error = EINVAL; 671321b17ecSEdward Tomasz Napierala break; 672321b17ecSEdward Tomasz Napierala } 673321b17ecSEdward Tomasz Napierala 674321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_AHS; 675321b17ecSEdward Tomasz Napierala ic->ic_receive_len = icl_pdu_ahs_length(request); 676321b17ecSEdward Tomasz Napierala break; 677321b17ecSEdward Tomasz Napierala 678321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_AHS: 679321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving AHS"); 680321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_ahs(request, availablep); 681321b17ecSEdward Tomasz Napierala if (error != 0) { 682321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive AHS; " 683321b17ecSEdward Tomasz Napierala "dropping connection"); 684321b17ecSEdward Tomasz Napierala break; 685321b17ecSEdward Tomasz Napierala } 686321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_HEADER_DIGEST; 687321b17ecSEdward Tomasz Napierala if (ic->ic_header_crc32c == false) 688321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 689321b17ecSEdward Tomasz Napierala else 690321b17ecSEdward Tomasz Napierala ic->ic_receive_len = ISCSI_HEADER_DIGEST_SIZE; 691321b17ecSEdward Tomasz Napierala break; 692321b17ecSEdward Tomasz Napierala 693321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_HEADER_DIGEST: 694321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving header digest"); 695321b17ecSEdward Tomasz Napierala error = icl_pdu_check_header_digest(request, availablep); 696321b17ecSEdward Tomasz Napierala if (error != 0) { 697321b17ecSEdward Tomasz Napierala ICL_DEBUG("header digest failed; " 698321b17ecSEdward Tomasz Napierala "dropping connection"); 699321b17ecSEdward Tomasz Napierala break; 700321b17ecSEdward Tomasz Napierala } 701321b17ecSEdward Tomasz Napierala 702321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_DATA; 703321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 704321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(request); 705321b17ecSEdward Tomasz Napierala break; 706321b17ecSEdward Tomasz Napierala 707321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_DATA: 708321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving data segment"); 709321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_data_segment(request, availablep, 710321b17ecSEdward Tomasz Napierala &more_needed); 711321b17ecSEdward Tomasz Napierala if (error != 0) { 712321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data segment;" 713321b17ecSEdward Tomasz Napierala "dropping connection"); 714321b17ecSEdward Tomasz Napierala break; 715321b17ecSEdward Tomasz Napierala } 716321b17ecSEdward Tomasz Napierala 717321b17ecSEdward Tomasz Napierala if (more_needed) 718321b17ecSEdward Tomasz Napierala break; 719321b17ecSEdward Tomasz Napierala 720321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_DATA_DIGEST; 721321b17ecSEdward Tomasz Napierala if (request->ip_data_len == 0 || ic->ic_data_crc32c == false) 722321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 723321b17ecSEdward Tomasz Napierala else 724321b17ecSEdward Tomasz Napierala ic->ic_receive_len = ISCSI_DATA_DIGEST_SIZE; 725321b17ecSEdward Tomasz Napierala break; 726321b17ecSEdward Tomasz Napierala 727321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_DATA_DIGEST: 728321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving data digest"); 729321b17ecSEdward Tomasz Napierala error = icl_pdu_check_data_digest(request, availablep); 730321b17ecSEdward Tomasz Napierala if (error != 0) { 731321b17ecSEdward Tomasz Napierala ICL_DEBUG("data digest failed; " 732321b17ecSEdward Tomasz Napierala "dropping connection"); 733321b17ecSEdward Tomasz Napierala break; 734321b17ecSEdward Tomasz Napierala } 735321b17ecSEdward Tomasz Napierala 736321b17ecSEdward Tomasz Napierala /* 737321b17ecSEdward Tomasz Napierala * We've received complete PDU; reset the receive state machine 738321b17ecSEdward Tomasz Napierala * and return the PDU. 739321b17ecSEdward Tomasz Napierala */ 740321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_BHS; 741321b17ecSEdward Tomasz Napierala ic->ic_receive_len = sizeof(struct iscsi_bhs); 742321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = NULL; 743321b17ecSEdward Tomasz Napierala return (request); 744321b17ecSEdward Tomasz Napierala 745321b17ecSEdward Tomasz Napierala default: 746321b17ecSEdward Tomasz Napierala panic("invalid ic_receive_state %d\n", ic->ic_receive_state); 747321b17ecSEdward Tomasz Napierala } 748321b17ecSEdward Tomasz Napierala 749321b17ecSEdward Tomasz Napierala if (error != 0) { 750321b17ecSEdward Tomasz Napierala /* 751321b17ecSEdward Tomasz Napierala * Don't free the PDU; it's pointed to by ic->ic_receive_pdu 7525aabcd7cSEdward Tomasz Napierala * and will get freed in icl_soft_conn_close(). 753321b17ecSEdward Tomasz Napierala */ 754321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 755321b17ecSEdward Tomasz Napierala } 756321b17ecSEdward Tomasz Napierala 757321b17ecSEdward Tomasz Napierala return (NULL); 758321b17ecSEdward Tomasz Napierala } 759321b17ecSEdward Tomasz Napierala 760321b17ecSEdward Tomasz Napierala static void 761321b17ecSEdward Tomasz Napierala icl_conn_receive_pdus(struct icl_conn *ic, size_t available) 762321b17ecSEdward Tomasz Napierala { 763321b17ecSEdward Tomasz Napierala struct icl_pdu *response; 764321b17ecSEdward Tomasz Napierala struct socket *so; 765321b17ecSEdward Tomasz Napierala 766321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 767321b17ecSEdward Tomasz Napierala 768321b17ecSEdward Tomasz Napierala /* 769321b17ecSEdward Tomasz Napierala * This can never happen; we're careful to only mess with ic->ic_socket 770321b17ecSEdward Tomasz Napierala * pointer when the send/receive threads are not running. 771321b17ecSEdward Tomasz Napierala */ 772321b17ecSEdward Tomasz Napierala KASSERT(so != NULL, ("NULL socket")); 773321b17ecSEdward Tomasz Napierala 774321b17ecSEdward Tomasz Napierala for (;;) { 775321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) 776321b17ecSEdward Tomasz Napierala return; 777321b17ecSEdward Tomasz Napierala 778321b17ecSEdward Tomasz Napierala if (so->so_error != 0) { 779321b17ecSEdward Tomasz Napierala ICL_DEBUG("connection error %d; " 780321b17ecSEdward Tomasz Napierala "dropping connection", so->so_error); 781321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 782321b17ecSEdward Tomasz Napierala return; 783321b17ecSEdward Tomasz Napierala } 784321b17ecSEdward Tomasz Napierala 785321b17ecSEdward Tomasz Napierala /* 786321b17ecSEdward Tomasz Napierala * Loop until we have a complete PDU or there is not enough 787321b17ecSEdward Tomasz Napierala * data in the socket buffer. 788321b17ecSEdward Tomasz Napierala */ 789321b17ecSEdward Tomasz Napierala if (available < ic->ic_receive_len) { 790321b17ecSEdward Tomasz Napierala #if 0 791321b17ecSEdward Tomasz Napierala ICL_DEBUG("not enough data; have %zd, " 792321b17ecSEdward Tomasz Napierala "need %zd", available, 793321b17ecSEdward Tomasz Napierala ic->ic_receive_len); 794321b17ecSEdward Tomasz Napierala #endif 795321b17ecSEdward Tomasz Napierala return; 796321b17ecSEdward Tomasz Napierala } 797321b17ecSEdward Tomasz Napierala 798321b17ecSEdward Tomasz Napierala response = icl_conn_receive_pdu(ic, &available); 799321b17ecSEdward Tomasz Napierala if (response == NULL) 800321b17ecSEdward Tomasz Napierala continue; 801321b17ecSEdward Tomasz Napierala 802321b17ecSEdward Tomasz Napierala if (response->ip_ahs_len > 0) { 803321b17ecSEdward Tomasz Napierala ICL_WARN("received PDU with unsupported " 804321b17ecSEdward Tomasz Napierala "AHS; opcode 0x%x; dropping connection", 805321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_opcode); 80682f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, response); 807321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 808321b17ecSEdward Tomasz Napierala return; 809321b17ecSEdward Tomasz Napierala } 810321b17ecSEdward Tomasz Napierala 811321b17ecSEdward Tomasz Napierala (ic->ic_receive)(response); 812321b17ecSEdward Tomasz Napierala } 813321b17ecSEdward Tomasz Napierala } 814321b17ecSEdward Tomasz Napierala 815321b17ecSEdward Tomasz Napierala static void 816321b17ecSEdward Tomasz Napierala icl_receive_thread(void *arg) 817321b17ecSEdward Tomasz Napierala { 818321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 819321b17ecSEdward Tomasz Napierala size_t available; 820321b17ecSEdward Tomasz Napierala struct socket *so; 821321b17ecSEdward Tomasz Napierala 822321b17ecSEdward Tomasz Napierala ic = arg; 823321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 824321b17ecSEdward Tomasz Napierala 825321b17ecSEdward Tomasz Napierala for (;;) { 826321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) { 827321b17ecSEdward Tomasz Napierala //ICL_DEBUG("terminating"); 828321b17ecSEdward Tomasz Napierala break; 829321b17ecSEdward Tomasz Napierala } 830321b17ecSEdward Tomasz Napierala 831321b17ecSEdward Tomasz Napierala /* 832321b17ecSEdward Tomasz Napierala * Set the low watermark, to be checked by 833321b17ecSEdward Tomasz Napierala * soreadable() in icl_soupcall_receive() 834266078c6SPedro F. Giffuni * to avoid unnecessary wakeups until there 835321b17ecSEdward Tomasz Napierala * is enough data received to read the PDU. 836321b17ecSEdward Tomasz Napierala */ 837321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_rcv); 838321b17ecSEdward Tomasz Napierala available = sbavail(&so->so_rcv); 839321b17ecSEdward Tomasz Napierala if (available < ic->ic_receive_len) { 840321b17ecSEdward Tomasz Napierala so->so_rcv.sb_lowat = ic->ic_receive_len; 841321b17ecSEdward Tomasz Napierala cv_wait(&ic->ic_receive_cv, &so->so_rcv.sb_mtx); 842321b17ecSEdward Tomasz Napierala } else 843321b17ecSEdward Tomasz Napierala so->so_rcv.sb_lowat = so->so_rcv.sb_hiwat + 1; 844321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_rcv); 845321b17ecSEdward Tomasz Napierala 846321b17ecSEdward Tomasz Napierala icl_conn_receive_pdus(ic, available); 847321b17ecSEdward Tomasz Napierala } 848321b17ecSEdward Tomasz Napierala 849321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 850321b17ecSEdward Tomasz Napierala ic->ic_receive_running = false; 851321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 852321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 853321b17ecSEdward Tomasz Napierala kthread_exit(); 854321b17ecSEdward Tomasz Napierala } 855321b17ecSEdward Tomasz Napierala 856321b17ecSEdward Tomasz Napierala static int 857321b17ecSEdward Tomasz Napierala icl_soupcall_receive(struct socket *so, void *arg, int waitflag) 858321b17ecSEdward Tomasz Napierala { 859321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 860321b17ecSEdward Tomasz Napierala 861321b17ecSEdward Tomasz Napierala if (!soreadable(so)) 862321b17ecSEdward Tomasz Napierala return (SU_OK); 863321b17ecSEdward Tomasz Napierala 864321b17ecSEdward Tomasz Napierala ic = arg; 865321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_receive_cv); 866321b17ecSEdward Tomasz Napierala return (SU_OK); 867321b17ecSEdward Tomasz Napierala } 868321b17ecSEdward Tomasz Napierala 869321b17ecSEdward Tomasz Napierala static int 870321b17ecSEdward Tomasz Napierala icl_pdu_finalize(struct icl_pdu *request) 871321b17ecSEdward Tomasz Napierala { 872321b17ecSEdward Tomasz Napierala size_t padding, pdu_len; 873321b17ecSEdward Tomasz Napierala uint32_t digest, zero = 0; 874321b17ecSEdward Tomasz Napierala int ok; 875321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 876321b17ecSEdward Tomasz Napierala 877321b17ecSEdward Tomasz Napierala ic = request->ip_conn; 878321b17ecSEdward Tomasz Napierala 879321b17ecSEdward Tomasz Napierala icl_pdu_set_data_segment_length(request, request->ip_data_len); 880321b17ecSEdward Tomasz Napierala 881321b17ecSEdward Tomasz Napierala pdu_len = icl_pdu_size(request); 882321b17ecSEdward Tomasz Napierala 883321b17ecSEdward Tomasz Napierala if (ic->ic_header_crc32c) { 884321b17ecSEdward Tomasz Napierala digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf); 885321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_bhs_mbuf, sizeof(digest), 886321b17ecSEdward Tomasz Napierala (void *)&digest); 887321b17ecSEdward Tomasz Napierala if (ok != 1) { 888321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append header digest"); 889321b17ecSEdward Tomasz Napierala return (1); 890321b17ecSEdward Tomasz Napierala } 891321b17ecSEdward Tomasz Napierala } 892321b17ecSEdward Tomasz Napierala 893321b17ecSEdward Tomasz Napierala if (request->ip_data_len != 0) { 894321b17ecSEdward Tomasz Napierala padding = icl_pdu_padding(request); 895321b17ecSEdward Tomasz Napierala if (padding > 0) { 896321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_data_mbuf, padding, 897321b17ecSEdward Tomasz Napierala (void *)&zero); 898321b17ecSEdward Tomasz Napierala if (ok != 1) { 899321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append padding"); 900321b17ecSEdward Tomasz Napierala return (1); 901321b17ecSEdward Tomasz Napierala } 902321b17ecSEdward Tomasz Napierala } 903321b17ecSEdward Tomasz Napierala 904321b17ecSEdward Tomasz Napierala if (ic->ic_data_crc32c) { 905321b17ecSEdward Tomasz Napierala digest = icl_mbuf_to_crc32c(request->ip_data_mbuf); 906321b17ecSEdward Tomasz Napierala 907321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_data_mbuf, sizeof(digest), 908321b17ecSEdward Tomasz Napierala (void *)&digest); 909321b17ecSEdward Tomasz Napierala if (ok != 1) { 910321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append data digest"); 911321b17ecSEdward Tomasz Napierala return (1); 912321b17ecSEdward Tomasz Napierala } 913321b17ecSEdward Tomasz Napierala } 914321b17ecSEdward Tomasz Napierala 915321b17ecSEdward Tomasz Napierala m_cat(request->ip_bhs_mbuf, request->ip_data_mbuf); 916321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = NULL; 917321b17ecSEdward Tomasz Napierala } 918321b17ecSEdward Tomasz Napierala 919321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf->m_pkthdr.len = pdu_len; 920321b17ecSEdward Tomasz Napierala 921321b17ecSEdward Tomasz Napierala return (0); 922321b17ecSEdward Tomasz Napierala } 923321b17ecSEdward Tomasz Napierala 924321b17ecSEdward Tomasz Napierala static void 925321b17ecSEdward Tomasz Napierala icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue) 926321b17ecSEdward Tomasz Napierala { 927321b17ecSEdward Tomasz Napierala struct icl_pdu *request, *request2; 928321b17ecSEdward Tomasz Napierala struct socket *so; 929605703b5SAlexander Motin long available, size, size2; 930321b17ecSEdward Tomasz Napierala int coalesced, error; 931321b17ecSEdward Tomasz Napierala 932321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 933321b17ecSEdward Tomasz Napierala 934321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 935321b17ecSEdward Tomasz Napierala 936321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_snd); 937321b17ecSEdward Tomasz Napierala /* 938321b17ecSEdward Tomasz Napierala * Check how much space do we have for transmit. We can't just 939321b17ecSEdward Tomasz Napierala * call sosend() and retry when we get EWOULDBLOCK or EMSGSIZE, 940321b17ecSEdward Tomasz Napierala * as it always frees the mbuf chain passed to it, even in case 941321b17ecSEdward Tomasz Napierala * of error. 942321b17ecSEdward Tomasz Napierala */ 943321b17ecSEdward Tomasz Napierala available = sbspace(&so->so_snd); 944321b17ecSEdward Tomasz Napierala 945321b17ecSEdward Tomasz Napierala /* 946321b17ecSEdward Tomasz Napierala * Notify the socket upcall that we don't need wakeups 947321b17ecSEdward Tomasz Napierala * for the time being. 948321b17ecSEdward Tomasz Napierala */ 949321b17ecSEdward Tomasz Napierala so->so_snd.sb_lowat = so->so_snd.sb_hiwat + 1; 950321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 951321b17ecSEdward Tomasz Napierala 952321b17ecSEdward Tomasz Napierala while (!STAILQ_EMPTY(queue)) { 953321b17ecSEdward Tomasz Napierala request = STAILQ_FIRST(queue); 954321b17ecSEdward Tomasz Napierala size = icl_pdu_size(request); 955321b17ecSEdward Tomasz Napierala if (available < size) { 956321b17ecSEdward Tomasz Napierala /* 957321b17ecSEdward Tomasz Napierala * Set the low watermark, to be checked by 958321b17ecSEdward Tomasz Napierala * sowriteable() in icl_soupcall_send() 959266078c6SPedro F. Giffuni * to avoid unnecessary wakeups until there 960321b17ecSEdward Tomasz Napierala * is enough space for the PDU to fit. 961321b17ecSEdward Tomasz Napierala */ 962321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_snd); 963321b17ecSEdward Tomasz Napierala available = sbspace(&so->so_snd); 964321b17ecSEdward Tomasz Napierala if (available < size) { 965321b17ecSEdward Tomasz Napierala #if 1 966321b17ecSEdward Tomasz Napierala ICL_DEBUG("no space to send; " 967605703b5SAlexander Motin "have %ld, need %ld", 968321b17ecSEdward Tomasz Napierala available, size); 969321b17ecSEdward Tomasz Napierala #endif 9701f29b46cSAlexander Motin so->so_snd.sb_lowat = max(size, 9711f29b46cSAlexander Motin so->so_snd.sb_hiwat / 8); 972321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 973321b17ecSEdward Tomasz Napierala return; 974321b17ecSEdward Tomasz Napierala } 975321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 976321b17ecSEdward Tomasz Napierala } 977321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(queue, ip_next); 978321b17ecSEdward Tomasz Napierala error = icl_pdu_finalize(request); 979321b17ecSEdward Tomasz Napierala if (error != 0) { 980321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to finalize PDU; " 981321b17ecSEdward Tomasz Napierala "dropping connection"); 9829a4510acSAlexander Motin icl_soft_pdu_done(request, EIO); 983321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 984321b17ecSEdward Tomasz Napierala return; 985321b17ecSEdward Tomasz Napierala } 986321b17ecSEdward Tomasz Napierala if (coalesce) { 987321b17ecSEdward Tomasz Napierala coalesced = 1; 988321b17ecSEdward Tomasz Napierala for (;;) { 989321b17ecSEdward Tomasz Napierala request2 = STAILQ_FIRST(queue); 990321b17ecSEdward Tomasz Napierala if (request2 == NULL) 991321b17ecSEdward Tomasz Napierala break; 992321b17ecSEdward Tomasz Napierala size2 = icl_pdu_size(request2); 993321b17ecSEdward Tomasz Napierala if (available < size + size2) 994321b17ecSEdward Tomasz Napierala break; 995321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(queue, ip_next); 996321b17ecSEdward Tomasz Napierala error = icl_pdu_finalize(request2); 997321b17ecSEdward Tomasz Napierala if (error != 0) { 998321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to finalize PDU; " 999321b17ecSEdward Tomasz Napierala "dropping connection"); 10009a4510acSAlexander Motin icl_soft_pdu_done(request, EIO); 10019a4510acSAlexander Motin icl_soft_pdu_done(request2, EIO); 1002321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 1003321b17ecSEdward Tomasz Napierala return; 1004321b17ecSEdward Tomasz Napierala } 1005321b17ecSEdward Tomasz Napierala m_cat(request->ip_bhs_mbuf, request2->ip_bhs_mbuf); 1006321b17ecSEdward Tomasz Napierala request2->ip_bhs_mbuf = NULL; 1007321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf->m_pkthdr.len += size2; 1008321b17ecSEdward Tomasz Napierala size += size2; 1009321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_AFTER(queue, request, ip_next); 10109a4510acSAlexander Motin icl_soft_pdu_done(request2, 0); 1011321b17ecSEdward Tomasz Napierala coalesced++; 1012321b17ecSEdward Tomasz Napierala } 1013321b17ecSEdward Tomasz Napierala #if 0 1014321b17ecSEdward Tomasz Napierala if (coalesced > 1) { 1015605703b5SAlexander Motin ICL_DEBUG("coalesced %d PDUs into %ld bytes", 1016321b17ecSEdward Tomasz Napierala coalesced, size); 1017321b17ecSEdward Tomasz Napierala } 1018321b17ecSEdward Tomasz Napierala #endif 1019321b17ecSEdward Tomasz Napierala } 1020321b17ecSEdward Tomasz Napierala available -= size; 1021321b17ecSEdward Tomasz Napierala error = sosend(so, NULL, NULL, request->ip_bhs_mbuf, 1022321b17ecSEdward Tomasz Napierala NULL, MSG_DONTWAIT, curthread); 1023321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf = NULL; /* Sosend consumes the mbuf. */ 1024321b17ecSEdward Tomasz Napierala if (error != 0) { 1025321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to send PDU, error %d; " 1026321b17ecSEdward Tomasz Napierala "dropping connection", error); 10279a4510acSAlexander Motin icl_soft_pdu_done(request, error); 1028321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 1029321b17ecSEdward Tomasz Napierala return; 1030321b17ecSEdward Tomasz Napierala } 10319a4510acSAlexander Motin icl_soft_pdu_done(request, 0); 1032321b17ecSEdward Tomasz Napierala } 1033321b17ecSEdward Tomasz Napierala } 1034321b17ecSEdward Tomasz Napierala 1035321b17ecSEdward Tomasz Napierala static void 1036321b17ecSEdward Tomasz Napierala icl_send_thread(void *arg) 1037321b17ecSEdward Tomasz Napierala { 1038321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1039321b17ecSEdward Tomasz Napierala struct icl_pdu_stailq queue; 1040321b17ecSEdward Tomasz Napierala 1041321b17ecSEdward Tomasz Napierala ic = arg; 1042321b17ecSEdward Tomasz Napierala 1043321b17ecSEdward Tomasz Napierala STAILQ_INIT(&queue); 1044321b17ecSEdward Tomasz Napierala 1045321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1046321b17ecSEdward Tomasz Napierala for (;;) { 1047321b17ecSEdward Tomasz Napierala for (;;) { 1048321b17ecSEdward Tomasz Napierala /* 1049321b17ecSEdward Tomasz Napierala * If the local queue is empty, populate it from 1050321b17ecSEdward Tomasz Napierala * the main one. This way the icl_conn_send_pdus() 1051321b17ecSEdward Tomasz Napierala * can go through all the queued PDUs without holding 1052321b17ecSEdward Tomasz Napierala * any locks. 1053321b17ecSEdward Tomasz Napierala */ 1054321b17ecSEdward Tomasz Napierala if (STAILQ_EMPTY(&queue)) 1055321b17ecSEdward Tomasz Napierala STAILQ_SWAP(&ic->ic_to_send, &queue, icl_pdu); 1056321b17ecSEdward Tomasz Napierala 1057321b17ecSEdward Tomasz Napierala ic->ic_check_send_space = false; 1058321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1059321b17ecSEdward Tomasz Napierala icl_conn_send_pdus(ic, &queue); 1060321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1061321b17ecSEdward Tomasz Napierala 1062321b17ecSEdward Tomasz Napierala /* 1063321b17ecSEdward Tomasz Napierala * The icl_soupcall_send() was called since the last 1064321b17ecSEdward Tomasz Napierala * call to sbspace(); go around; 1065321b17ecSEdward Tomasz Napierala */ 1066321b17ecSEdward Tomasz Napierala if (ic->ic_check_send_space) 1067321b17ecSEdward Tomasz Napierala continue; 1068321b17ecSEdward Tomasz Napierala 1069321b17ecSEdward Tomasz Napierala /* 1070321b17ecSEdward Tomasz Napierala * Local queue is empty, but we still have PDUs 1071321b17ecSEdward Tomasz Napierala * in the main one; go around. 1072321b17ecSEdward Tomasz Napierala */ 1073321b17ecSEdward Tomasz Napierala if (STAILQ_EMPTY(&queue) && 1074321b17ecSEdward Tomasz Napierala !STAILQ_EMPTY(&ic->ic_to_send)) 1075321b17ecSEdward Tomasz Napierala continue; 1076321b17ecSEdward Tomasz Napierala 1077321b17ecSEdward Tomasz Napierala /* 1078321b17ecSEdward Tomasz Napierala * There might be some stuff in the local queue, 1079321b17ecSEdward Tomasz Napierala * which didn't get sent due to not having enough send 1080321b17ecSEdward Tomasz Napierala * space. Wait for socket upcall. 1081321b17ecSEdward Tomasz Napierala */ 1082321b17ecSEdward Tomasz Napierala break; 1083321b17ecSEdward Tomasz Napierala } 1084321b17ecSEdward Tomasz Napierala 1085321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) { 1086321b17ecSEdward Tomasz Napierala //ICL_DEBUG("terminating"); 1087321b17ecSEdward Tomasz Napierala break; 1088321b17ecSEdward Tomasz Napierala } 1089321b17ecSEdward Tomasz Napierala 1090321b17ecSEdward Tomasz Napierala cv_wait(&ic->ic_send_cv, ic->ic_lock); 1091321b17ecSEdward Tomasz Napierala } 1092321b17ecSEdward Tomasz Napierala 1093321b17ecSEdward Tomasz Napierala /* 1094321b17ecSEdward Tomasz Napierala * We're exiting; move PDUs back to the main queue, so they can 1095321b17ecSEdward Tomasz Napierala * get freed properly. At this point ordering doesn't matter. 1096321b17ecSEdward Tomasz Napierala */ 1097321b17ecSEdward Tomasz Napierala STAILQ_CONCAT(&ic->ic_to_send, &queue); 1098321b17ecSEdward Tomasz Napierala 1099321b17ecSEdward Tomasz Napierala ic->ic_send_running = false; 1100321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1101321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1102321b17ecSEdward Tomasz Napierala kthread_exit(); 1103321b17ecSEdward Tomasz Napierala } 1104321b17ecSEdward Tomasz Napierala 1105321b17ecSEdward Tomasz Napierala static int 1106321b17ecSEdward Tomasz Napierala icl_soupcall_send(struct socket *so, void *arg, int waitflag) 1107321b17ecSEdward Tomasz Napierala { 1108321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1109321b17ecSEdward Tomasz Napierala 1110321b17ecSEdward Tomasz Napierala if (!sowriteable(so)) 1111321b17ecSEdward Tomasz Napierala return (SU_OK); 1112321b17ecSEdward Tomasz Napierala 1113321b17ecSEdward Tomasz Napierala ic = arg; 1114321b17ecSEdward Tomasz Napierala 1115321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1116321b17ecSEdward Tomasz Napierala ic->ic_check_send_space = true; 1117321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1118321b17ecSEdward Tomasz Napierala 1119321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1120321b17ecSEdward Tomasz Napierala 1121321b17ecSEdward Tomasz Napierala return (SU_OK); 1122321b17ecSEdward Tomasz Napierala } 1123321b17ecSEdward Tomasz Napierala 1124321b17ecSEdward Tomasz Napierala static int 112582f7fa7aSAlexander Motin icl_soft_conn_pdu_append_data(struct icl_conn *ic, struct icl_pdu *request, 112682f7fa7aSAlexander Motin const void *addr, size_t len, int flags) 1127321b17ecSEdward Tomasz Napierala { 11289a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)request; 1129321b17ecSEdward Tomasz Napierala struct mbuf *mb, *newmb; 1130321b17ecSEdward Tomasz Napierala size_t copylen, off = 0; 1131321b17ecSEdward Tomasz Napierala 1132321b17ecSEdward Tomasz Napierala KASSERT(len > 0, ("len == 0")); 1133321b17ecSEdward Tomasz Napierala 11349a4510acSAlexander Motin if (flags & ICL_NOCOPY) { 11359a4510acSAlexander Motin newmb = m_get(flags & ~ICL_NOCOPY, MT_DATA); 11369a4510acSAlexander Motin if (newmb == NULL) { 11379a4510acSAlexander Motin ICL_WARN("failed to allocate mbuf"); 11389a4510acSAlexander Motin return (ENOMEM); 11399a4510acSAlexander Motin } 11409a4510acSAlexander Motin 11419a4510acSAlexander Motin newmb->m_flags |= M_RDONLY; 11429a4510acSAlexander Motin m_extaddref(newmb, __DECONST(char *, addr), len, &isp->ref_cnt, 11439a4510acSAlexander Motin icl_soft_mbuf_done, isp, NULL); 11449a4510acSAlexander Motin newmb->m_len = len; 11459a4510acSAlexander Motin } else { 1146898fd11fSAlexander Motin newmb = m_getm2(NULL, len, flags, MT_DATA, 0); 1147321b17ecSEdward Tomasz Napierala if (newmb == NULL) { 1148321b17ecSEdward Tomasz Napierala ICL_WARN("failed to allocate mbuf for %zd bytes", len); 1149321b17ecSEdward Tomasz Napierala return (ENOMEM); 1150321b17ecSEdward Tomasz Napierala } 1151321b17ecSEdward Tomasz Napierala 1152321b17ecSEdward Tomasz Napierala for (mb = newmb; mb != NULL; mb = mb->m_next) { 1153321b17ecSEdward Tomasz Napierala copylen = min(M_TRAILINGSPACE(mb), len - off); 1154321b17ecSEdward Tomasz Napierala memcpy(mtod(mb, char *), (const char *)addr + off, copylen); 1155321b17ecSEdward Tomasz Napierala mb->m_len = copylen; 1156321b17ecSEdward Tomasz Napierala off += copylen; 1157321b17ecSEdward Tomasz Napierala } 1158321b17ecSEdward Tomasz Napierala KASSERT(off == len, ("%s: off != len", __func__)); 11599a4510acSAlexander Motin } 1160321b17ecSEdward Tomasz Napierala 1161321b17ecSEdward Tomasz Napierala if (request->ip_data_mbuf == NULL) { 1162321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = newmb; 1163321b17ecSEdward Tomasz Napierala request->ip_data_len = len; 1164321b17ecSEdward Tomasz Napierala } else { 1165321b17ecSEdward Tomasz Napierala m_cat(request->ip_data_mbuf, newmb); 1166321b17ecSEdward Tomasz Napierala request->ip_data_len += len; 1167321b17ecSEdward Tomasz Napierala } 1168321b17ecSEdward Tomasz Napierala 1169321b17ecSEdward Tomasz Napierala return (0); 1170321b17ecSEdward Tomasz Napierala } 1171321b17ecSEdward Tomasz Napierala 1172321b17ecSEdward Tomasz Napierala void 1173321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_get_data(struct icl_conn *ic, struct icl_pdu *ip, 1174321b17ecSEdward Tomasz Napierala size_t off, void *addr, size_t len) 1175321b17ecSEdward Tomasz Napierala { 1176321b17ecSEdward Tomasz Napierala 117782f7fa7aSAlexander Motin m_copydata(ip->ip_data_mbuf, off, len, addr); 1178321b17ecSEdward Tomasz Napierala } 1179321b17ecSEdward Tomasz Napierala 1180321b17ecSEdward Tomasz Napierala static void 11819a4510acSAlexander Motin icl_soft_conn_pdu_queue(struct icl_conn *ic, struct icl_pdu *ip) 1182321b17ecSEdward Tomasz Napierala { 1183321b17ecSEdward Tomasz Napierala 11849a4510acSAlexander Motin icl_soft_conn_pdu_queue_cb(ic, ip, NULL); 11859a4510acSAlexander Motin } 11869a4510acSAlexander Motin 11879a4510acSAlexander Motin static void 11889a4510acSAlexander Motin icl_soft_conn_pdu_queue_cb(struct icl_conn *ic, struct icl_pdu *ip, 11899a4510acSAlexander Motin icl_pdu_cb cb) 11909a4510acSAlexander Motin { 11919a4510acSAlexander Motin struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip; 1192321b17ecSEdward Tomasz Napierala 1193321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT(ic); 11949a4510acSAlexander Motin isp->ref_cnt++; 11959a4510acSAlexander Motin isp->cb = cb; 1196321b17ecSEdward Tomasz Napierala 1197321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting || ic->ic_socket == NULL) { 1198321b17ecSEdward Tomasz Napierala ICL_DEBUG("icl_pdu_queue on closed connection"); 11999a4510acSAlexander Motin icl_soft_pdu_done(ip, ENOTCONN); 1200321b17ecSEdward Tomasz Napierala return; 1201321b17ecSEdward Tomasz Napierala } 1202321b17ecSEdward Tomasz Napierala 1203321b17ecSEdward Tomasz Napierala if (!STAILQ_EMPTY(&ic->ic_to_send)) { 1204321b17ecSEdward Tomasz Napierala STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next); 1205321b17ecSEdward Tomasz Napierala /* 1206321b17ecSEdward Tomasz Napierala * If the queue is not empty, someone else had already 1207321b17ecSEdward Tomasz Napierala * signaled the send thread; no need to do that again, 1208321b17ecSEdward Tomasz Napierala * just return. 1209321b17ecSEdward Tomasz Napierala */ 1210321b17ecSEdward Tomasz Napierala return; 1211321b17ecSEdward Tomasz Napierala } 1212321b17ecSEdward Tomasz Napierala 1213321b17ecSEdward Tomasz Napierala STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next); 1214321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1215321b17ecSEdward Tomasz Napierala } 1216321b17ecSEdward Tomasz Napierala 1217321b17ecSEdward Tomasz Napierala static struct icl_conn * 1218321b17ecSEdward Tomasz Napierala icl_soft_new_conn(const char *name, struct mtx *lock) 1219321b17ecSEdward Tomasz Napierala { 1220321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1221321b17ecSEdward Tomasz Napierala 1222321b17ecSEdward Tomasz Napierala refcount_acquire(&icl_ncons); 1223321b17ecSEdward Tomasz Napierala 1224321b17ecSEdward Tomasz Napierala ic = (struct icl_conn *)kobj_create(&icl_soft_class, M_ICL_SOFT, M_WAITOK | M_ZERO); 1225321b17ecSEdward Tomasz Napierala 1226321b17ecSEdward Tomasz Napierala STAILQ_INIT(&ic->ic_to_send); 1227321b17ecSEdward Tomasz Napierala ic->ic_lock = lock; 1228321b17ecSEdward Tomasz Napierala cv_init(&ic->ic_send_cv, "icl_tx"); 1229321b17ecSEdward Tomasz Napierala cv_init(&ic->ic_receive_cv, "icl_rx"); 1230321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 1231321b17ecSEdward Tomasz Napierala refcount_init(&ic->ic_outstanding_pdus, 0); 1232321b17ecSEdward Tomasz Napierala #endif 1233321b17ecSEdward Tomasz Napierala ic->ic_max_data_segment_length = ICL_MAX_DATA_SEGMENT_LENGTH; 1234321b17ecSEdward Tomasz Napierala ic->ic_name = name; 1235d4b195d3SEdward Tomasz Napierala ic->ic_offload = "None"; 12367deb68abSEdward Tomasz Napierala ic->ic_unmapped = false; 1237321b17ecSEdward Tomasz Napierala 1238321b17ecSEdward Tomasz Napierala return (ic); 1239321b17ecSEdward Tomasz Napierala } 1240321b17ecSEdward Tomasz Napierala 1241321b17ecSEdward Tomasz Napierala void 1242321b17ecSEdward Tomasz Napierala icl_soft_conn_free(struct icl_conn *ic) 1243321b17ecSEdward Tomasz Napierala { 1244321b17ecSEdward Tomasz Napierala 124522d3bb26SEdward Tomasz Napierala #ifdef DIAGNOSTIC 124622d3bb26SEdward Tomasz Napierala KASSERT(ic->ic_outstanding_pdus == 0, 124722d3bb26SEdward Tomasz Napierala ("destroying session with %d outstanding PDUs", 124822d3bb26SEdward Tomasz Napierala ic->ic_outstanding_pdus)); 124922d3bb26SEdward Tomasz Napierala #endif 1250321b17ecSEdward Tomasz Napierala cv_destroy(&ic->ic_send_cv); 1251321b17ecSEdward Tomasz Napierala cv_destroy(&ic->ic_receive_cv); 1252321b17ecSEdward Tomasz Napierala kobj_delete((struct kobj *)ic, M_ICL_SOFT); 1253321b17ecSEdward Tomasz Napierala refcount_release(&icl_ncons); 1254321b17ecSEdward Tomasz Napierala } 1255321b17ecSEdward Tomasz Napierala 1256321b17ecSEdward Tomasz Napierala static int 1257321b17ecSEdward Tomasz Napierala icl_conn_start(struct icl_conn *ic) 1258321b17ecSEdward Tomasz Napierala { 1259321b17ecSEdward Tomasz Napierala size_t minspace; 1260321b17ecSEdward Tomasz Napierala struct sockopt opt; 1261321b17ecSEdward Tomasz Napierala int error, one = 1; 1262321b17ecSEdward Tomasz Napierala 1263321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1264321b17ecSEdward Tomasz Napierala 1265321b17ecSEdward Tomasz Napierala /* 1266321b17ecSEdward Tomasz Napierala * XXX: Ugly hack. 1267321b17ecSEdward Tomasz Napierala */ 1268321b17ecSEdward Tomasz Napierala if (ic->ic_socket == NULL) { 1269321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1270321b17ecSEdward Tomasz Napierala return (EINVAL); 1271321b17ecSEdward Tomasz Napierala } 1272321b17ecSEdward Tomasz Napierala 1273321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_BHS; 1274321b17ecSEdward Tomasz Napierala ic->ic_receive_len = sizeof(struct iscsi_bhs); 1275321b17ecSEdward Tomasz Napierala ic->ic_disconnecting = false; 1276321b17ecSEdward Tomasz Napierala 1277321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1278321b17ecSEdward Tomasz Napierala 1279321b17ecSEdward Tomasz Napierala /* 1280321b17ecSEdward Tomasz Napierala * For sendspace, this is required because the current code cannot 1281321b17ecSEdward Tomasz Napierala * send a PDU in pieces; thus, the minimum buffer size is equal 1282321b17ecSEdward Tomasz Napierala * to the maximum PDU size. "+4" is to account for possible padding. 1283321b17ecSEdward Tomasz Napierala * 1284321b17ecSEdward Tomasz Napierala * What we should actually do here is to use autoscaling, but set 1285321b17ecSEdward Tomasz Napierala * some minimal buffer size to "minspace". I don't know a way to do 1286321b17ecSEdward Tomasz Napierala * that, though. 1287321b17ecSEdward Tomasz Napierala */ 1288321b17ecSEdward Tomasz Napierala minspace = sizeof(struct iscsi_bhs) + ic->ic_max_data_segment_length + 1289321b17ecSEdward Tomasz Napierala ISCSI_HEADER_DIGEST_SIZE + ISCSI_DATA_DIGEST_SIZE + 4; 1290321b17ecSEdward Tomasz Napierala if (sendspace < minspace) { 1291321b17ecSEdward Tomasz Napierala ICL_WARN("kern.icl.sendspace too low; must be at least %zd", 1292321b17ecSEdward Tomasz Napierala minspace); 1293321b17ecSEdward Tomasz Napierala sendspace = minspace; 1294321b17ecSEdward Tomasz Napierala } 1295321b17ecSEdward Tomasz Napierala if (recvspace < minspace) { 1296321b17ecSEdward Tomasz Napierala ICL_WARN("kern.icl.recvspace too low; must be at least %zd", 1297321b17ecSEdward Tomasz Napierala minspace); 1298321b17ecSEdward Tomasz Napierala recvspace = minspace; 1299321b17ecSEdward Tomasz Napierala } 1300321b17ecSEdward Tomasz Napierala 1301321b17ecSEdward Tomasz Napierala error = soreserve(ic->ic_socket, sendspace, recvspace); 1302321b17ecSEdward Tomasz Napierala if (error != 0) { 1303321b17ecSEdward Tomasz Napierala ICL_WARN("soreserve failed with error %d", error); 13045aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(ic); 1305321b17ecSEdward Tomasz Napierala return (error); 1306321b17ecSEdward Tomasz Napierala } 1307321b17ecSEdward Tomasz Napierala ic->ic_socket->so_snd.sb_flags |= SB_AUTOSIZE; 1308321b17ecSEdward Tomasz Napierala ic->ic_socket->so_rcv.sb_flags |= SB_AUTOSIZE; 1309321b17ecSEdward Tomasz Napierala 1310321b17ecSEdward Tomasz Napierala /* 1311321b17ecSEdward Tomasz Napierala * Disable Nagle. 1312321b17ecSEdward Tomasz Napierala */ 1313321b17ecSEdward Tomasz Napierala bzero(&opt, sizeof(opt)); 1314321b17ecSEdward Tomasz Napierala opt.sopt_dir = SOPT_SET; 1315321b17ecSEdward Tomasz Napierala opt.sopt_level = IPPROTO_TCP; 1316321b17ecSEdward Tomasz Napierala opt.sopt_name = TCP_NODELAY; 1317321b17ecSEdward Tomasz Napierala opt.sopt_val = &one; 1318321b17ecSEdward Tomasz Napierala opt.sopt_valsize = sizeof(one); 1319321b17ecSEdward Tomasz Napierala error = sosetopt(ic->ic_socket, &opt); 1320321b17ecSEdward Tomasz Napierala if (error != 0) { 1321321b17ecSEdward Tomasz Napierala ICL_WARN("disabling TCP_NODELAY failed with error %d", error); 13225aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(ic); 1323321b17ecSEdward Tomasz Napierala return (error); 1324321b17ecSEdward Tomasz Napierala } 1325321b17ecSEdward Tomasz Napierala 1326321b17ecSEdward Tomasz Napierala /* 1327321b17ecSEdward Tomasz Napierala * Register socket upcall, to get notified about incoming PDUs 1328321b17ecSEdward Tomasz Napierala * and free space to send outgoing ones. 1329321b17ecSEdward Tomasz Napierala */ 1330321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&ic->ic_socket->so_snd); 1331321b17ecSEdward Tomasz Napierala soupcall_set(ic->ic_socket, SO_SND, icl_soupcall_send, ic); 1332321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&ic->ic_socket->so_snd); 1333321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&ic->ic_socket->so_rcv); 1334321b17ecSEdward Tomasz Napierala soupcall_set(ic->ic_socket, SO_RCV, icl_soupcall_receive, ic); 1335321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&ic->ic_socket->so_rcv); 1336321b17ecSEdward Tomasz Napierala 13375b157f21SAlexander Motin /* 13385b157f21SAlexander Motin * Start threads. 13395b157f21SAlexander Motin */ 13405b157f21SAlexander Motin ICL_CONN_LOCK(ic); 13415b157f21SAlexander Motin ic->ic_send_running = ic->ic_receive_running = true; 13425b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 13435b157f21SAlexander Motin error = kthread_add(icl_send_thread, ic, NULL, NULL, 0, 0, "%stx", 13445b157f21SAlexander Motin ic->ic_name); 13455b157f21SAlexander Motin if (error != 0) { 13465b157f21SAlexander Motin ICL_WARN("kthread_add(9) failed with error %d", error); 13475b157f21SAlexander Motin ICL_CONN_LOCK(ic); 13485b157f21SAlexander Motin ic->ic_send_running = ic->ic_receive_running = false; 13495b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 13505b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 13515b157f21SAlexander Motin icl_soft_conn_close(ic); 13525b157f21SAlexander Motin return (error); 13535b157f21SAlexander Motin } 13545b157f21SAlexander Motin error = kthread_add(icl_receive_thread, ic, NULL, NULL, 0, 0, "%srx", 13555b157f21SAlexander Motin ic->ic_name); 13565b157f21SAlexander Motin if (error != 0) { 13575b157f21SAlexander Motin ICL_WARN("kthread_add(9) failed with error %d", error); 13585b157f21SAlexander Motin ICL_CONN_LOCK(ic); 13595b157f21SAlexander Motin ic->ic_receive_running = false; 13605b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 13615b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 13625b157f21SAlexander Motin icl_soft_conn_close(ic); 13635b157f21SAlexander Motin return (error); 13645b157f21SAlexander Motin } 13655b157f21SAlexander Motin 1366321b17ecSEdward Tomasz Napierala return (0); 1367321b17ecSEdward Tomasz Napierala } 1368321b17ecSEdward Tomasz Napierala 1369321b17ecSEdward Tomasz Napierala int 1370321b17ecSEdward Tomasz Napierala icl_soft_conn_handoff(struct icl_conn *ic, int fd) 1371321b17ecSEdward Tomasz Napierala { 1372321b17ecSEdward Tomasz Napierala struct file *fp; 1373321b17ecSEdward Tomasz Napierala struct socket *so; 1374321b17ecSEdward Tomasz Napierala cap_rights_t rights; 1375321b17ecSEdward Tomasz Napierala int error; 1376321b17ecSEdward Tomasz Napierala 1377321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 1378321b17ecSEdward Tomasz Napierala 1379906a424bSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 1380906a424bSEdward Tomasz Napierala /* 1381906a424bSEdward Tomasz Napierala * We're transitioning to Full Feature phase, and we don't 1382906a424bSEdward Tomasz Napierala * really care. 1383906a424bSEdward Tomasz Napierala */ 1384906a424bSEdward Tomasz Napierala if (fd == 0) { 1385906a424bSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1386906a424bSEdward Tomasz Napierala if (ic->ic_socket == NULL) { 1387906a424bSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1388906a424bSEdward Tomasz Napierala ICL_WARN("proxy handoff without connect"); 1389906a424bSEdward Tomasz Napierala return (EINVAL); 1390906a424bSEdward Tomasz Napierala } 1391906a424bSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1392906a424bSEdward Tomasz Napierala return (0); 1393906a424bSEdward Tomasz Napierala } 1394906a424bSEdward Tomasz Napierala #endif 1395906a424bSEdward Tomasz Napierala 1396321b17ecSEdward Tomasz Napierala /* 1397321b17ecSEdward Tomasz Napierala * Steal the socket from userland. 1398321b17ecSEdward Tomasz Napierala */ 1399321b17ecSEdward Tomasz Napierala error = fget(curthread, fd, 1400*6b3a9a0fSMateusz Guzik cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp); 1401321b17ecSEdward Tomasz Napierala if (error != 0) 1402321b17ecSEdward Tomasz Napierala return (error); 1403321b17ecSEdward Tomasz Napierala if (fp->f_type != DTYPE_SOCKET) { 1404321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1405321b17ecSEdward Tomasz Napierala return (EINVAL); 1406321b17ecSEdward Tomasz Napierala } 1407321b17ecSEdward Tomasz Napierala so = fp->f_data; 1408321b17ecSEdward Tomasz Napierala if (so->so_type != SOCK_STREAM) { 1409321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1410321b17ecSEdward Tomasz Napierala return (EINVAL); 1411321b17ecSEdward Tomasz Napierala } 1412321b17ecSEdward Tomasz Napierala 1413321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1414321b17ecSEdward Tomasz Napierala 1415321b17ecSEdward Tomasz Napierala if (ic->ic_socket != NULL) { 1416321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1417321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1418321b17ecSEdward Tomasz Napierala return (EBUSY); 1419321b17ecSEdward Tomasz Napierala } 1420321b17ecSEdward Tomasz Napierala 1421321b17ecSEdward Tomasz Napierala ic->ic_socket = fp->f_data; 1422321b17ecSEdward Tomasz Napierala fp->f_ops = &badfileops; 1423321b17ecSEdward Tomasz Napierala fp->f_data = NULL; 1424321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1425321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1426321b17ecSEdward Tomasz Napierala 1427321b17ecSEdward Tomasz Napierala error = icl_conn_start(ic); 1428321b17ecSEdward Tomasz Napierala 1429321b17ecSEdward Tomasz Napierala return (error); 1430321b17ecSEdward Tomasz Napierala } 1431321b17ecSEdward Tomasz Napierala 1432321b17ecSEdward Tomasz Napierala void 14335aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(struct icl_conn *ic) 1434321b17ecSEdward Tomasz Napierala { 1435321b17ecSEdward Tomasz Napierala struct icl_pdu *pdu; 14365b157f21SAlexander Motin struct socket *so; 1437321b17ecSEdward Tomasz Napierala 1438321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 14395b157f21SAlexander Motin 14405b157f21SAlexander Motin /* 14415b157f21SAlexander Motin * Wake up the threads, so they can properly terminate. 14425b157f21SAlexander Motin */ 14435b157f21SAlexander Motin ic->ic_disconnecting = true; 14445b157f21SAlexander Motin while (ic->ic_receive_running || ic->ic_send_running) { 14455b157f21SAlexander Motin cv_signal(&ic->ic_receive_cv); 14465b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 14475b157f21SAlexander Motin cv_wait(&ic->ic_send_cv, ic->ic_lock); 14485b157f21SAlexander Motin } 14495b157f21SAlexander Motin 14505b157f21SAlexander Motin /* Some other thread could close the connection same time. */ 14515b157f21SAlexander Motin so = ic->ic_socket; 14525b157f21SAlexander Motin if (so == NULL) { 1453321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1454321b17ecSEdward Tomasz Napierala return; 1455321b17ecSEdward Tomasz Napierala } 14565b157f21SAlexander Motin ic->ic_socket = NULL; 1457321b17ecSEdward Tomasz Napierala 1458321b17ecSEdward Tomasz Napierala /* 1459321b17ecSEdward Tomasz Napierala * Deregister socket upcalls. 1460321b17ecSEdward Tomasz Napierala */ 1461321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 14625b157f21SAlexander Motin SOCKBUF_LOCK(&so->so_snd); 14635b157f21SAlexander Motin if (so->so_snd.sb_upcall != NULL) 14645b157f21SAlexander Motin soupcall_clear(so, SO_SND); 14655b157f21SAlexander Motin SOCKBUF_UNLOCK(&so->so_snd); 14665b157f21SAlexander Motin SOCKBUF_LOCK(&so->so_rcv); 14675b157f21SAlexander Motin if (so->so_rcv.sb_upcall != NULL) 14685b157f21SAlexander Motin soupcall_clear(so, SO_RCV); 14695b157f21SAlexander Motin SOCKBUF_UNLOCK(&so->so_rcv); 14705b157f21SAlexander Motin soclose(so); 1471321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1472321b17ecSEdward Tomasz Napierala 1473321b17ecSEdward Tomasz Napierala if (ic->ic_receive_pdu != NULL) { 1474321b17ecSEdward Tomasz Napierala //ICL_DEBUG("freeing partially received PDU"); 147582f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ic->ic_receive_pdu); 1476321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = NULL; 1477321b17ecSEdward Tomasz Napierala } 1478321b17ecSEdward Tomasz Napierala 1479321b17ecSEdward Tomasz Napierala /* 1480321b17ecSEdward Tomasz Napierala * Remove any outstanding PDUs from the send queue. 1481321b17ecSEdward Tomasz Napierala */ 1482321b17ecSEdward Tomasz Napierala while (!STAILQ_EMPTY(&ic->ic_to_send)) { 1483321b17ecSEdward Tomasz Napierala pdu = STAILQ_FIRST(&ic->ic_to_send); 1484321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(&ic->ic_to_send, ip_next); 14859a4510acSAlexander Motin icl_soft_pdu_done(pdu, ENOTCONN); 1486321b17ecSEdward Tomasz Napierala } 1487321b17ecSEdward Tomasz Napierala 1488321b17ecSEdward Tomasz Napierala KASSERT(STAILQ_EMPTY(&ic->ic_to_send), 1489321b17ecSEdward Tomasz Napierala ("destroying session with non-empty send queue")); 1490321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1491321b17ecSEdward Tomasz Napierala } 1492321b17ecSEdward Tomasz Napierala 14937a03d007SEdward Tomasz Napierala int 1494604c023fSEdward Tomasz Napierala icl_soft_conn_task_setup(struct icl_conn *ic, struct icl_pdu *ip, 1495604c023fSEdward Tomasz Napierala struct ccb_scsiio *csio, uint32_t *task_tagp, void **prvp) 14967a03d007SEdward Tomasz Napierala { 14977a03d007SEdward Tomasz Napierala 14987a03d007SEdward Tomasz Napierala return (0); 14997a03d007SEdward Tomasz Napierala } 15007a03d007SEdward Tomasz Napierala 15017a03d007SEdward Tomasz Napierala void 15027a03d007SEdward Tomasz Napierala icl_soft_conn_task_done(struct icl_conn *ic, void *prv) 15037a03d007SEdward Tomasz Napierala { 15047a03d007SEdward Tomasz Napierala } 15057a03d007SEdward Tomasz Napierala 15067a03d007SEdward Tomasz Napierala int 15077a03d007SEdward Tomasz Napierala icl_soft_conn_transfer_setup(struct icl_conn *ic, union ctl_io *io, 15087a03d007SEdward Tomasz Napierala uint32_t *transfer_tag, void **prvp) 15097a03d007SEdward Tomasz Napierala { 15107a03d007SEdward Tomasz Napierala 15117a03d007SEdward Tomasz Napierala return (0); 15127a03d007SEdward Tomasz Napierala } 15137a03d007SEdward Tomasz Napierala 15147a03d007SEdward Tomasz Napierala void 15157a03d007SEdward Tomasz Napierala icl_soft_conn_transfer_done(struct icl_conn *ic, void *prv) 15167a03d007SEdward Tomasz Napierala { 15177a03d007SEdward Tomasz Napierala } 15187a03d007SEdward Tomasz Napierala 1519321b17ecSEdward Tomasz Napierala static int 152097b84d34SNavdeep Parhar icl_soft_limits(struct icl_drv_limits *idl) 1521321b17ecSEdward Tomasz Napierala { 1522321b17ecSEdward Tomasz Napierala 152397b84d34SNavdeep Parhar idl->idl_max_recv_data_segment_length = 128 * 1024; 15249ac7c5a6SHans Petter Selasky idl->idl_max_send_data_segment_length = 128 * 1024; 15259ac7c5a6SHans Petter Selasky idl->idl_max_burst_length = 262144; 15269ac7c5a6SHans Petter Selasky idl->idl_first_burst_length = 65536; 1527321b17ecSEdward Tomasz Napierala 1528321b17ecSEdward Tomasz Napierala return (0); 1529321b17ecSEdward Tomasz Napierala } 1530321b17ecSEdward Tomasz Napierala 1531321b17ecSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 1532321b17ecSEdward Tomasz Napierala int 1533f41492b0SEdward Tomasz Napierala icl_soft_conn_connect(struct icl_conn *ic, int domain, int socktype, 1534f41492b0SEdward Tomasz Napierala int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa) 1535f41492b0SEdward Tomasz Napierala { 1536f41492b0SEdward Tomasz Napierala 1537f41492b0SEdward Tomasz Napierala return (icl_soft_proxy_connect(ic, domain, socktype, protocol, 1538f41492b0SEdward Tomasz Napierala from_sa, to_sa)); 1539f41492b0SEdward Tomasz Napierala } 1540f41492b0SEdward Tomasz Napierala 1541f41492b0SEdward Tomasz Napierala int 1542f41492b0SEdward Tomasz Napierala icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so) 1543321b17ecSEdward Tomasz Napierala { 1544321b17ecSEdward Tomasz Napierala int error; 1545321b17ecSEdward Tomasz Napierala 1546321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 1547321b17ecSEdward Tomasz Napierala 1548321b17ecSEdward Tomasz Napierala if (so->so_type != SOCK_STREAM) 1549321b17ecSEdward Tomasz Napierala return (EINVAL); 1550321b17ecSEdward Tomasz Napierala 1551321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1552321b17ecSEdward Tomasz Napierala if (ic->ic_socket != NULL) { 1553321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1554321b17ecSEdward Tomasz Napierala return (EBUSY); 1555321b17ecSEdward Tomasz Napierala } 1556321b17ecSEdward Tomasz Napierala ic->ic_socket = so; 1557321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1558321b17ecSEdward Tomasz Napierala 1559321b17ecSEdward Tomasz Napierala error = icl_conn_start(ic); 1560321b17ecSEdward Tomasz Napierala 1561321b17ecSEdward Tomasz Napierala return (error); 1562321b17ecSEdward Tomasz Napierala } 1563321b17ecSEdward Tomasz Napierala #endif /* ICL_KERNEL_PROXY */ 1564321b17ecSEdward Tomasz Napierala 1565321b17ecSEdward Tomasz Napierala static int 1566321b17ecSEdward Tomasz Napierala icl_soft_load(void) 1567321b17ecSEdward Tomasz Napierala { 1568321b17ecSEdward Tomasz Napierala int error; 1569321b17ecSEdward Tomasz Napierala 15709a4510acSAlexander Motin icl_soft_pdu_zone = uma_zcreate("icl_soft_pdu", 15719a4510acSAlexander Motin sizeof(struct icl_soft_pdu), NULL, NULL, NULL, NULL, 1572321b17ecSEdward Tomasz Napierala UMA_ALIGN_PTR, 0); 1573321b17ecSEdward Tomasz Napierala refcount_init(&icl_ncons, 0); 1574321b17ecSEdward Tomasz Napierala 1575321b17ecSEdward Tomasz Napierala /* 1576321b17ecSEdward Tomasz Napierala * The reason we call this "none" is that to the user, 1577321b17ecSEdward Tomasz Napierala * it's known as "offload driver"; "offload driver: soft" 1578321b17ecSEdward Tomasz Napierala * doesn't make much sense. 1579321b17ecSEdward Tomasz Napierala */ 1580b8911594SEdward Tomasz Napierala error = icl_register("none", false, 0, 1581b8911594SEdward Tomasz Napierala icl_soft_limits, icl_soft_new_conn); 1582321b17ecSEdward Tomasz Napierala KASSERT(error == 0, ("failed to register")); 1583321b17ecSEdward Tomasz Napierala 1584b8911594SEdward Tomasz Napierala #if defined(ICL_KERNEL_PROXY) && 0 1585b8911594SEdward Tomasz Napierala /* 1586b8911594SEdward Tomasz Napierala * Debugging aid for kernel proxy functionality. 1587b8911594SEdward Tomasz Napierala */ 1588b8911594SEdward Tomasz Napierala error = icl_register("proxytest", true, 0, 1589b8911594SEdward Tomasz Napierala icl_soft_limits, icl_soft_new_conn); 1590b8911594SEdward Tomasz Napierala KASSERT(error == 0, ("failed to register")); 1591b8911594SEdward Tomasz Napierala #endif 1592b8911594SEdward Tomasz Napierala 1593321b17ecSEdward Tomasz Napierala return (error); 1594321b17ecSEdward Tomasz Napierala } 1595321b17ecSEdward Tomasz Napierala 1596321b17ecSEdward Tomasz Napierala static int 1597321b17ecSEdward Tomasz Napierala icl_soft_unload(void) 1598321b17ecSEdward Tomasz Napierala { 1599321b17ecSEdward Tomasz Napierala 1600321b17ecSEdward Tomasz Napierala if (icl_ncons != 0) 1601321b17ecSEdward Tomasz Napierala return (EBUSY); 1602321b17ecSEdward Tomasz Napierala 1603b8911594SEdward Tomasz Napierala icl_unregister("none", false); 1604b8911594SEdward Tomasz Napierala #if defined(ICL_KERNEL_PROXY) && 0 1605b8911594SEdward Tomasz Napierala icl_unregister("proxytest", true); 1606b8911594SEdward Tomasz Napierala #endif 1607321b17ecSEdward Tomasz Napierala 16089a4510acSAlexander Motin uma_zdestroy(icl_soft_pdu_zone); 1609321b17ecSEdward Tomasz Napierala 1610321b17ecSEdward Tomasz Napierala return (0); 1611321b17ecSEdward Tomasz Napierala } 1612321b17ecSEdward Tomasz Napierala 1613321b17ecSEdward Tomasz Napierala static int 1614321b17ecSEdward Tomasz Napierala icl_soft_modevent(module_t mod, int what, void *arg) 1615321b17ecSEdward Tomasz Napierala { 1616321b17ecSEdward Tomasz Napierala 1617321b17ecSEdward Tomasz Napierala switch (what) { 1618321b17ecSEdward Tomasz Napierala case MOD_LOAD: 1619321b17ecSEdward Tomasz Napierala return (icl_soft_load()); 1620321b17ecSEdward Tomasz Napierala case MOD_UNLOAD: 1621321b17ecSEdward Tomasz Napierala return (icl_soft_unload()); 1622321b17ecSEdward Tomasz Napierala default: 1623321b17ecSEdward Tomasz Napierala return (EINVAL); 1624321b17ecSEdward Tomasz Napierala } 1625321b17ecSEdward Tomasz Napierala } 1626321b17ecSEdward Tomasz Napierala 1627321b17ecSEdward Tomasz Napierala moduledata_t icl_soft_data = { 1628321b17ecSEdward Tomasz Napierala "icl_soft", 1629321b17ecSEdward Tomasz Napierala icl_soft_modevent, 1630321b17ecSEdward Tomasz Napierala 0 1631321b17ecSEdward Tomasz Napierala }; 1632321b17ecSEdward Tomasz Napierala 1633321b17ecSEdward Tomasz Napierala DECLARE_MODULE(icl_soft, icl_soft_data, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 1634321b17ecSEdward Tomasz Napierala MODULE_DEPEND(icl_soft, icl, 1, 1, 1); 1635872d2d92SEdward Tomasz Napierala MODULE_VERSION(icl_soft, 1); 1636