1321b17ecSEdward Tomasz Napierala /*- 2321b17ecSEdward Tomasz Napierala * Copyright (c) 2012 The FreeBSD Foundation 3321b17ecSEdward Tomasz Napierala * All rights reserved. 4321b17ecSEdward Tomasz Napierala * 5321b17ecSEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 6321b17ecSEdward Tomasz Napierala * from the FreeBSD Foundation. 7321b17ecSEdward Tomasz Napierala * 8321b17ecSEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 9321b17ecSEdward Tomasz Napierala * modification, are permitted provided that the following conditions 10321b17ecSEdward Tomasz Napierala * are met: 11321b17ecSEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 12321b17ecSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 13321b17ecSEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 14321b17ecSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 15321b17ecSEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 16321b17ecSEdward Tomasz Napierala * 17321b17ecSEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18321b17ecSEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19321b17ecSEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20321b17ecSEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21321b17ecSEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22321b17ecSEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23321b17ecSEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24321b17ecSEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25321b17ecSEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26321b17ecSEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27321b17ecSEdward Tomasz Napierala * SUCH DAMAGE. 28321b17ecSEdward Tomasz Napierala * 29321b17ecSEdward Tomasz Napierala */ 30321b17ecSEdward Tomasz Napierala 31321b17ecSEdward Tomasz Napierala /* 325aabcd7cSEdward Tomasz Napierala * Software implementation of iSCSI Common Layer kobj(9) interface. 33321b17ecSEdward Tomasz Napierala */ 34321b17ecSEdward Tomasz Napierala 35321b17ecSEdward Tomasz Napierala #include <sys/cdefs.h> 36321b17ecSEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 37321b17ecSEdward Tomasz Napierala 38321b17ecSEdward Tomasz Napierala #include <sys/param.h> 39321b17ecSEdward Tomasz Napierala #include <sys/capsicum.h> 40321b17ecSEdward Tomasz Napierala #include <sys/condvar.h> 41321b17ecSEdward Tomasz Napierala #include <sys/conf.h> 42321b17ecSEdward Tomasz Napierala #include <sys/file.h> 43321b17ecSEdward Tomasz Napierala #include <sys/kernel.h> 44321b17ecSEdward Tomasz Napierala #include <sys/kthread.h> 45321b17ecSEdward Tomasz Napierala #include <sys/lock.h> 46321b17ecSEdward Tomasz Napierala #include <sys/mbuf.h> 47321b17ecSEdward Tomasz Napierala #include <sys/mutex.h> 48321b17ecSEdward Tomasz Napierala #include <sys/module.h> 49321b17ecSEdward Tomasz Napierala #include <sys/protosw.h> 50321b17ecSEdward Tomasz Napierala #include <sys/socket.h> 51321b17ecSEdward Tomasz Napierala #include <sys/socketvar.h> 52321b17ecSEdward Tomasz Napierala #include <sys/sysctl.h> 53321b17ecSEdward Tomasz Napierala #include <sys/systm.h> 54321b17ecSEdward Tomasz Napierala #include <sys/sx.h> 55321b17ecSEdward Tomasz Napierala #include <sys/uio.h> 56321b17ecSEdward Tomasz Napierala #include <vm/uma.h> 57321b17ecSEdward Tomasz Napierala #include <netinet/in.h> 58321b17ecSEdward Tomasz Napierala #include <netinet/tcp.h> 59321b17ecSEdward Tomasz Napierala 60321b17ecSEdward Tomasz Napierala #include <dev/iscsi/icl.h> 61321b17ecSEdward Tomasz Napierala #include <dev/iscsi/iscsi_proto.h> 62321b17ecSEdward Tomasz Napierala #include <icl_conn_if.h> 63321b17ecSEdward Tomasz Napierala 64321b17ecSEdward Tomasz Napierala static int coalesce = 1; 65321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, coalesce, CTLFLAG_RWTUN, 66321b17ecSEdward Tomasz Napierala &coalesce, 0, "Try to coalesce PDUs before sending"); 67321b17ecSEdward Tomasz Napierala static int partial_receive_len = 128 * 1024; 68321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, partial_receive_len, CTLFLAG_RWTUN, 69321b17ecSEdward Tomasz Napierala &partial_receive_len, 0, "Minimum read size for partially received " 70321b17ecSEdward Tomasz Napierala "data segment"); 71321b17ecSEdward Tomasz Napierala static int sendspace = 1048576; 72321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, sendspace, CTLFLAG_RWTUN, 73321b17ecSEdward Tomasz Napierala &sendspace, 0, "Default send socket buffer size"); 74321b17ecSEdward Tomasz Napierala static int recvspace = 1048576; 75321b17ecSEdward Tomasz Napierala SYSCTL_INT(_kern_icl, OID_AUTO, recvspace, CTLFLAG_RWTUN, 76321b17ecSEdward Tomasz Napierala &recvspace, 0, "Default receive socket buffer size"); 77321b17ecSEdward Tomasz Napierala 78321b17ecSEdward Tomasz Napierala static MALLOC_DEFINE(M_ICL_SOFT, "icl_soft", "iSCSI software backend"); 79321b17ecSEdward Tomasz Napierala static uma_zone_t icl_pdu_zone; 80321b17ecSEdward Tomasz Napierala 81321b17ecSEdward Tomasz Napierala static volatile u_int icl_ncons; 82321b17ecSEdward Tomasz Napierala 83321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK(X) mtx_lock(X->ic_lock) 84321b17ecSEdward Tomasz Napierala #define ICL_CONN_UNLOCK(X) mtx_unlock(X->ic_lock) 85321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK_ASSERT(X) mtx_assert(X->ic_lock, MA_OWNED) 86321b17ecSEdward Tomasz Napierala #define ICL_CONN_LOCK_ASSERT_NOT(X) mtx_assert(X->ic_lock, MA_NOTOWNED) 87321b17ecSEdward Tomasz Napierala 88321b17ecSEdward Tomasz Napierala STAILQ_HEAD(icl_pdu_stailq, icl_pdu); 89321b17ecSEdward Tomasz Napierala 90321b17ecSEdward Tomasz Napierala static icl_conn_new_pdu_t icl_soft_conn_new_pdu; 91321b17ecSEdward Tomasz Napierala static icl_conn_pdu_free_t icl_soft_conn_pdu_free; 92321b17ecSEdward Tomasz Napierala static icl_conn_pdu_data_segment_length_t 93321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length; 94321b17ecSEdward Tomasz Napierala static icl_conn_pdu_append_data_t icl_soft_conn_pdu_append_data; 95321b17ecSEdward Tomasz Napierala static icl_conn_pdu_get_data_t icl_soft_conn_pdu_get_data; 96321b17ecSEdward Tomasz Napierala static icl_conn_pdu_queue_t icl_soft_conn_pdu_queue; 97321b17ecSEdward Tomasz Napierala static icl_conn_handoff_t icl_soft_conn_handoff; 98321b17ecSEdward Tomasz Napierala static icl_conn_free_t icl_soft_conn_free; 99321b17ecSEdward Tomasz Napierala static icl_conn_close_t icl_soft_conn_close; 1007a03d007SEdward Tomasz Napierala static icl_conn_task_setup_t icl_soft_conn_task_setup; 1017a03d007SEdward Tomasz Napierala static icl_conn_task_done_t icl_soft_conn_task_done; 1027a03d007SEdward Tomasz Napierala static icl_conn_transfer_setup_t icl_soft_conn_transfer_setup; 1037a03d007SEdward Tomasz Napierala static icl_conn_transfer_done_t icl_soft_conn_transfer_done; 104f41492b0SEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 105f41492b0SEdward Tomasz Napierala static icl_conn_connect_t icl_soft_conn_connect; 106f41492b0SEdward Tomasz Napierala #endif 107321b17ecSEdward Tomasz Napierala 108321b17ecSEdward Tomasz Napierala static kobj_method_t icl_soft_methods[] = { 109321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_new_pdu, icl_soft_conn_new_pdu), 110321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_free, icl_soft_conn_pdu_free), 111321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_data_segment_length, 112321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length), 113321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_append_data, icl_soft_conn_pdu_append_data), 114321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_get_data, icl_soft_conn_pdu_get_data), 115321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_pdu_queue, icl_soft_conn_pdu_queue), 116321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_handoff, icl_soft_conn_handoff), 117321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_free, icl_soft_conn_free), 118321b17ecSEdward Tomasz Napierala KOBJMETHOD(icl_conn_close, icl_soft_conn_close), 1197a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_task_setup, icl_soft_conn_task_setup), 1207a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_task_done, icl_soft_conn_task_done), 1217a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_transfer_setup, icl_soft_conn_transfer_setup), 1227a03d007SEdward Tomasz Napierala KOBJMETHOD(icl_conn_transfer_done, icl_soft_conn_transfer_done), 123f41492b0SEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 124f41492b0SEdward Tomasz Napierala KOBJMETHOD(icl_conn_connect, icl_soft_conn_connect), 125f41492b0SEdward Tomasz Napierala #endif 126321b17ecSEdward Tomasz Napierala { 0, 0 } 127321b17ecSEdward Tomasz Napierala }; 128321b17ecSEdward Tomasz Napierala 129321b17ecSEdward Tomasz Napierala DEFINE_CLASS(icl_soft, icl_soft_methods, sizeof(struct icl_conn)); 130321b17ecSEdward Tomasz Napierala 131321b17ecSEdward Tomasz Napierala static void 132321b17ecSEdward Tomasz Napierala icl_conn_fail(struct icl_conn *ic) 133321b17ecSEdward Tomasz Napierala { 134321b17ecSEdward Tomasz Napierala if (ic->ic_socket == NULL) 135321b17ecSEdward Tomasz Napierala return; 136321b17ecSEdward Tomasz Napierala 137321b17ecSEdward Tomasz Napierala /* 138321b17ecSEdward Tomasz Napierala * XXX 139321b17ecSEdward Tomasz Napierala */ 140321b17ecSEdward Tomasz Napierala ic->ic_socket->so_error = EDOOFUS; 141321b17ecSEdward Tomasz Napierala (ic->ic_error)(ic); 142321b17ecSEdward Tomasz Napierala } 143321b17ecSEdward Tomasz Napierala 144321b17ecSEdward Tomasz Napierala static struct mbuf * 145321b17ecSEdward Tomasz Napierala icl_conn_receive(struct icl_conn *ic, size_t len) 146321b17ecSEdward Tomasz Napierala { 147321b17ecSEdward Tomasz Napierala struct uio uio; 148321b17ecSEdward Tomasz Napierala struct socket *so; 149321b17ecSEdward Tomasz Napierala struct mbuf *m; 150321b17ecSEdward Tomasz Napierala int error, flags; 151321b17ecSEdward Tomasz Napierala 152321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 153321b17ecSEdward Tomasz Napierala 154321b17ecSEdward Tomasz Napierala memset(&uio, 0, sizeof(uio)); 155321b17ecSEdward Tomasz Napierala uio.uio_resid = len; 156321b17ecSEdward Tomasz Napierala 157321b17ecSEdward Tomasz Napierala flags = MSG_DONTWAIT; 158321b17ecSEdward Tomasz Napierala error = soreceive(so, NULL, &uio, &m, NULL, &flags); 159321b17ecSEdward Tomasz Napierala if (error != 0) { 160321b17ecSEdward Tomasz Napierala ICL_DEBUG("soreceive error %d", error); 161321b17ecSEdward Tomasz Napierala return (NULL); 162321b17ecSEdward Tomasz Napierala } 163321b17ecSEdward Tomasz Napierala if (uio.uio_resid != 0) { 164321b17ecSEdward Tomasz Napierala m_freem(m); 165321b17ecSEdward Tomasz Napierala ICL_DEBUG("short read"); 166321b17ecSEdward Tomasz Napierala return (NULL); 167321b17ecSEdward Tomasz Napierala } 168321b17ecSEdward Tomasz Napierala 169321b17ecSEdward Tomasz Napierala return (m); 170321b17ecSEdward Tomasz Napierala } 171321b17ecSEdward Tomasz Napierala 172d0d587c7SAlexander Motin static int 173d0d587c7SAlexander Motin icl_conn_receive_buf(struct icl_conn *ic, void *buf, size_t len) 174d0d587c7SAlexander Motin { 175d0d587c7SAlexander Motin struct iovec iov[1]; 176d0d587c7SAlexander Motin struct uio uio; 177d0d587c7SAlexander Motin struct socket *so; 178d0d587c7SAlexander Motin int error, flags; 179d0d587c7SAlexander Motin 180d0d587c7SAlexander Motin so = ic->ic_socket; 181d0d587c7SAlexander Motin 182d0d587c7SAlexander Motin memset(&uio, 0, sizeof(uio)); 183d0d587c7SAlexander Motin iov[0].iov_base = buf; 184d0d587c7SAlexander Motin iov[0].iov_len = len; 185d0d587c7SAlexander Motin uio.uio_iov = iov; 186d0d587c7SAlexander Motin uio.uio_iovcnt = 1; 187d0d587c7SAlexander Motin uio.uio_offset = 0; 188d0d587c7SAlexander Motin uio.uio_resid = len; 189d0d587c7SAlexander Motin uio.uio_segflg = UIO_SYSSPACE; 190d0d587c7SAlexander Motin uio.uio_rw = UIO_READ; 191d0d587c7SAlexander Motin 192d0d587c7SAlexander Motin flags = MSG_DONTWAIT; 193d0d587c7SAlexander Motin error = soreceive(so, NULL, &uio, NULL, NULL, &flags); 194d0d587c7SAlexander Motin if (error != 0) { 195d0d587c7SAlexander Motin ICL_DEBUG("soreceive error %d", error); 196d0d587c7SAlexander Motin return (-1); 197d0d587c7SAlexander Motin } 198d0d587c7SAlexander Motin if (uio.uio_resid != 0) { 199d0d587c7SAlexander Motin ICL_DEBUG("short read"); 200d0d587c7SAlexander Motin return (-1); 201d0d587c7SAlexander Motin } 202d0d587c7SAlexander Motin 203d0d587c7SAlexander Motin return (0); 204d0d587c7SAlexander Motin } 205d0d587c7SAlexander Motin 20682f7fa7aSAlexander Motin static void 20782f7fa7aSAlexander Motin icl_soft_conn_pdu_free(struct icl_conn *ic, struct icl_pdu *ip) 20882f7fa7aSAlexander Motin { 20982f7fa7aSAlexander Motin 21082f7fa7aSAlexander Motin m_freem(ip->ip_bhs_mbuf); 21182f7fa7aSAlexander Motin m_freem(ip->ip_ahs_mbuf); 21282f7fa7aSAlexander Motin m_freem(ip->ip_data_mbuf); 21382f7fa7aSAlexander Motin uma_zfree(icl_pdu_zone, ip); 21482f7fa7aSAlexander Motin #ifdef DIAGNOSTIC 21582f7fa7aSAlexander Motin refcount_release(&ic->ic_outstanding_pdus); 21682f7fa7aSAlexander Motin #endif 21782f7fa7aSAlexander Motin } 21882f7fa7aSAlexander Motin 21982f7fa7aSAlexander Motin /* 22082f7fa7aSAlexander Motin * Allocate icl_pdu with empty BHS to fill up by the caller. 22182f7fa7aSAlexander Motin */ 22282f7fa7aSAlexander Motin struct icl_pdu * 22382f7fa7aSAlexander Motin icl_soft_conn_new_pdu(struct icl_conn *ic, int flags) 224321b17ecSEdward Tomasz Napierala { 225321b17ecSEdward Tomasz Napierala struct icl_pdu *ip; 226321b17ecSEdward Tomasz Napierala 227321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 228321b17ecSEdward Tomasz Napierala refcount_acquire(&ic->ic_outstanding_pdus); 229321b17ecSEdward Tomasz Napierala #endif 230321b17ecSEdward Tomasz Napierala ip = uma_zalloc(icl_pdu_zone, flags | M_ZERO); 231321b17ecSEdward Tomasz Napierala if (ip == NULL) { 232321b17ecSEdward Tomasz Napierala ICL_WARN("failed to allocate %zd bytes", sizeof(*ip)); 233321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 234321b17ecSEdward Tomasz Napierala refcount_release(&ic->ic_outstanding_pdus); 235321b17ecSEdward Tomasz Napierala #endif 236321b17ecSEdward Tomasz Napierala return (NULL); 237321b17ecSEdward Tomasz Napierala } 238321b17ecSEdward Tomasz Napierala ip->ip_conn = ic; 239321b17ecSEdward Tomasz Napierala 24033d9db92SAlexander Motin CTASSERT(sizeof(struct iscsi_bhs) <= MHLEN); 24133d9db92SAlexander Motin ip->ip_bhs_mbuf = m_gethdr(flags, MT_DATA); 242321b17ecSEdward Tomasz Napierala if (ip->ip_bhs_mbuf == NULL) { 243d0d587c7SAlexander Motin ICL_WARN("failed to allocate BHS mbuf"); 24482f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ip); 245321b17ecSEdward Tomasz Napierala return (NULL); 246321b17ecSEdward Tomasz Napierala } 247321b17ecSEdward Tomasz Napierala ip->ip_bhs = mtod(ip->ip_bhs_mbuf, struct iscsi_bhs *); 248321b17ecSEdward Tomasz Napierala memset(ip->ip_bhs, 0, sizeof(struct iscsi_bhs)); 249321b17ecSEdward Tomasz Napierala ip->ip_bhs_mbuf->m_len = sizeof(struct iscsi_bhs); 250321b17ecSEdward Tomasz Napierala 251321b17ecSEdward Tomasz Napierala return (ip); 252321b17ecSEdward Tomasz Napierala } 253321b17ecSEdward Tomasz Napierala 254321b17ecSEdward Tomasz Napierala static int 255321b17ecSEdward Tomasz Napierala icl_pdu_ahs_length(const struct icl_pdu *request) 256321b17ecSEdward Tomasz Napierala { 257321b17ecSEdward Tomasz Napierala 258321b17ecSEdward Tomasz Napierala return (request->ip_bhs->bhs_total_ahs_len * 4); 259321b17ecSEdward Tomasz Napierala } 260321b17ecSEdward Tomasz Napierala 261321b17ecSEdward Tomasz Napierala static size_t 262321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_length(const struct icl_pdu *request) 263321b17ecSEdward Tomasz Napierala { 264321b17ecSEdward Tomasz Napierala uint32_t len = 0; 265321b17ecSEdward Tomasz Napierala 266321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[0]; 267321b17ecSEdward Tomasz Napierala len <<= 8; 268321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[1]; 269321b17ecSEdward Tomasz Napierala len <<= 8; 270321b17ecSEdward Tomasz Napierala len += request->ip_bhs->bhs_data_segment_len[2]; 271321b17ecSEdward Tomasz Napierala 272321b17ecSEdward Tomasz Napierala return (len); 273321b17ecSEdward Tomasz Napierala } 274321b17ecSEdward Tomasz Napierala 275321b17ecSEdward Tomasz Napierala size_t 276321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_data_segment_length(struct icl_conn *ic, 277321b17ecSEdward Tomasz Napierala const struct icl_pdu *request) 278321b17ecSEdward Tomasz Napierala { 279321b17ecSEdward Tomasz Napierala 280321b17ecSEdward Tomasz Napierala return (icl_pdu_data_segment_length(request)); 281321b17ecSEdward Tomasz Napierala } 282321b17ecSEdward Tomasz Napierala 283321b17ecSEdward Tomasz Napierala static void 284321b17ecSEdward Tomasz Napierala icl_pdu_set_data_segment_length(struct icl_pdu *response, uint32_t len) 285321b17ecSEdward Tomasz Napierala { 286321b17ecSEdward Tomasz Napierala 287321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[2] = len; 288321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[1] = len >> 8; 289321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_data_segment_len[0] = len >> 16; 290321b17ecSEdward Tomasz Napierala } 291321b17ecSEdward Tomasz Napierala 292321b17ecSEdward Tomasz Napierala static size_t 293321b17ecSEdward Tomasz Napierala icl_pdu_padding(const struct icl_pdu *ip) 294321b17ecSEdward Tomasz Napierala { 295321b17ecSEdward Tomasz Napierala 296321b17ecSEdward Tomasz Napierala if ((ip->ip_data_len % 4) != 0) 297321b17ecSEdward Tomasz Napierala return (4 - (ip->ip_data_len % 4)); 298321b17ecSEdward Tomasz Napierala 299321b17ecSEdward Tomasz Napierala return (0); 300321b17ecSEdward Tomasz Napierala } 301321b17ecSEdward Tomasz Napierala 302321b17ecSEdward Tomasz Napierala static size_t 303321b17ecSEdward Tomasz Napierala icl_pdu_size(const struct icl_pdu *response) 304321b17ecSEdward Tomasz Napierala { 305321b17ecSEdward Tomasz Napierala size_t len; 306321b17ecSEdward Tomasz Napierala 307321b17ecSEdward Tomasz Napierala KASSERT(response->ip_ahs_len == 0, ("responding with AHS")); 308321b17ecSEdward Tomasz Napierala 309321b17ecSEdward Tomasz Napierala len = sizeof(struct iscsi_bhs) + response->ip_data_len + 310321b17ecSEdward Tomasz Napierala icl_pdu_padding(response); 311321b17ecSEdward Tomasz Napierala if (response->ip_conn->ic_header_crc32c) 312321b17ecSEdward Tomasz Napierala len += ISCSI_HEADER_DIGEST_SIZE; 313321b17ecSEdward Tomasz Napierala if (response->ip_data_len != 0 && response->ip_conn->ic_data_crc32c) 314321b17ecSEdward Tomasz Napierala len += ISCSI_DATA_DIGEST_SIZE; 315321b17ecSEdward Tomasz Napierala 316321b17ecSEdward Tomasz Napierala return (len); 317321b17ecSEdward Tomasz Napierala } 318321b17ecSEdward Tomasz Napierala 319321b17ecSEdward Tomasz Napierala static int 320321b17ecSEdward Tomasz Napierala icl_pdu_receive_bhs(struct icl_pdu *request, size_t *availablep) 321321b17ecSEdward Tomasz Napierala { 322321b17ecSEdward Tomasz Napierala 323d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 324d0d587c7SAlexander Motin request->ip_bhs, sizeof(struct iscsi_bhs))) { 325321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive BHS"); 326321b17ecSEdward Tomasz Napierala return (-1); 327321b17ecSEdward Tomasz Napierala } 328321b17ecSEdward Tomasz Napierala 329321b17ecSEdward Tomasz Napierala *availablep -= sizeof(struct iscsi_bhs); 330321b17ecSEdward Tomasz Napierala return (0); 331321b17ecSEdward Tomasz Napierala } 332321b17ecSEdward Tomasz Napierala 333321b17ecSEdward Tomasz Napierala static int 334321b17ecSEdward Tomasz Napierala icl_pdu_receive_ahs(struct icl_pdu *request, size_t *availablep) 335321b17ecSEdward Tomasz Napierala { 336321b17ecSEdward Tomasz Napierala 337321b17ecSEdward Tomasz Napierala request->ip_ahs_len = icl_pdu_ahs_length(request); 338321b17ecSEdward Tomasz Napierala if (request->ip_ahs_len == 0) 339321b17ecSEdward Tomasz Napierala return (0); 340321b17ecSEdward Tomasz Napierala 341321b17ecSEdward Tomasz Napierala request->ip_ahs_mbuf = icl_conn_receive(request->ip_conn, 342321b17ecSEdward Tomasz Napierala request->ip_ahs_len); 343321b17ecSEdward Tomasz Napierala if (request->ip_ahs_mbuf == NULL) { 344321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive AHS"); 345321b17ecSEdward Tomasz Napierala return (-1); 346321b17ecSEdward Tomasz Napierala } 347321b17ecSEdward Tomasz Napierala 348321b17ecSEdward Tomasz Napierala *availablep -= request->ip_ahs_len; 349321b17ecSEdward Tomasz Napierala return (0); 350321b17ecSEdward Tomasz Napierala } 351321b17ecSEdward Tomasz Napierala 352321b17ecSEdward Tomasz Napierala static uint32_t 353321b17ecSEdward Tomasz Napierala icl_mbuf_to_crc32c(const struct mbuf *m0) 354321b17ecSEdward Tomasz Napierala { 355321b17ecSEdward Tomasz Napierala uint32_t digest = 0xffffffff; 356321b17ecSEdward Tomasz Napierala const struct mbuf *m; 357321b17ecSEdward Tomasz Napierala 358321b17ecSEdward Tomasz Napierala for (m = m0; m != NULL; m = m->m_next) 359321b17ecSEdward Tomasz Napierala digest = calculate_crc32c(digest, 360321b17ecSEdward Tomasz Napierala mtod(m, const void *), m->m_len); 361321b17ecSEdward Tomasz Napierala 362321b17ecSEdward Tomasz Napierala digest = digest ^ 0xffffffff; 363321b17ecSEdward Tomasz Napierala 364321b17ecSEdward Tomasz Napierala return (digest); 365321b17ecSEdward Tomasz Napierala } 366321b17ecSEdward Tomasz Napierala 367321b17ecSEdward Tomasz Napierala static int 368321b17ecSEdward Tomasz Napierala icl_pdu_check_header_digest(struct icl_pdu *request, size_t *availablep) 369321b17ecSEdward Tomasz Napierala { 370321b17ecSEdward Tomasz Napierala uint32_t received_digest, valid_digest; 371321b17ecSEdward Tomasz Napierala 372321b17ecSEdward Tomasz Napierala if (request->ip_conn->ic_header_crc32c == false) 373321b17ecSEdward Tomasz Napierala return (0); 374321b17ecSEdward Tomasz Napierala 375d0d587c7SAlexander Motin CTASSERT(sizeof(received_digest) == ISCSI_HEADER_DIGEST_SIZE); 376d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 377d0d587c7SAlexander Motin &received_digest, ISCSI_HEADER_DIGEST_SIZE)) { 378321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive header digest"); 379321b17ecSEdward Tomasz Napierala return (-1); 380321b17ecSEdward Tomasz Napierala } 381321b17ecSEdward Tomasz Napierala *availablep -= ISCSI_HEADER_DIGEST_SIZE; 382321b17ecSEdward Tomasz Napierala 383875ac6cfSAlexander Motin /* Temporary attach AHS to BHS to calculate header digest. */ 384875ac6cfSAlexander Motin request->ip_bhs_mbuf->m_next = request->ip_ahs_mbuf; 385321b17ecSEdward Tomasz Napierala valid_digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf); 386875ac6cfSAlexander Motin request->ip_bhs_mbuf->m_next = NULL; 387321b17ecSEdward Tomasz Napierala if (received_digest != valid_digest) { 388321b17ecSEdward Tomasz Napierala ICL_WARN("header digest check failed; got 0x%x, " 389321b17ecSEdward Tomasz Napierala "should be 0x%x", received_digest, valid_digest); 390321b17ecSEdward Tomasz Napierala return (-1); 391321b17ecSEdward Tomasz Napierala } 392321b17ecSEdward Tomasz Napierala 393321b17ecSEdward Tomasz Napierala return (0); 394321b17ecSEdward Tomasz Napierala } 395321b17ecSEdward Tomasz Napierala 396321b17ecSEdward Tomasz Napierala /* 397321b17ecSEdward Tomasz Napierala * Return the number of bytes that should be waiting in the receive socket 398321b17ecSEdward Tomasz Napierala * before icl_pdu_receive_data_segment() gets called. 399321b17ecSEdward Tomasz Napierala */ 400321b17ecSEdward Tomasz Napierala static size_t 401321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(const struct icl_pdu *request) 402321b17ecSEdward Tomasz Napierala { 403321b17ecSEdward Tomasz Napierala size_t len; 404321b17ecSEdward Tomasz Napierala 405321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 406321b17ecSEdward Tomasz Napierala if (len == 0) 407321b17ecSEdward Tomasz Napierala return (0); 408321b17ecSEdward Tomasz Napierala 409321b17ecSEdward Tomasz Napierala /* 410321b17ecSEdward Tomasz Napierala * Account for the parts of data segment already read from 411321b17ecSEdward Tomasz Napierala * the socket buffer. 412321b17ecSEdward Tomasz Napierala */ 413321b17ecSEdward Tomasz Napierala KASSERT(len > request->ip_data_len, ("len <= request->ip_data_len")); 414321b17ecSEdward Tomasz Napierala len -= request->ip_data_len; 415321b17ecSEdward Tomasz Napierala 416321b17ecSEdward Tomasz Napierala /* 417321b17ecSEdward Tomasz Napierala * Don't always wait for the full data segment to be delivered 418321b17ecSEdward Tomasz Napierala * to the socket; this might badly affect performance due to 419321b17ecSEdward Tomasz Napierala * TCP window scaling. 420321b17ecSEdward Tomasz Napierala */ 421321b17ecSEdward Tomasz Napierala if (len > partial_receive_len) { 422321b17ecSEdward Tomasz Napierala #if 0 423321b17ecSEdward Tomasz Napierala ICL_DEBUG("need %zd bytes of data, limiting to %zd", 424321b17ecSEdward Tomasz Napierala len, partial_receive_len)); 425321b17ecSEdward Tomasz Napierala #endif 426321b17ecSEdward Tomasz Napierala len = partial_receive_len; 427321b17ecSEdward Tomasz Napierala 428321b17ecSEdward Tomasz Napierala return (len); 429321b17ecSEdward Tomasz Napierala } 430321b17ecSEdward Tomasz Napierala 431321b17ecSEdward Tomasz Napierala /* 432321b17ecSEdward Tomasz Napierala * Account for padding. Note that due to the way code is written, 433321b17ecSEdward Tomasz Napierala * the icl_pdu_receive_data_segment() must always receive padding 434321b17ecSEdward Tomasz Napierala * along with the last part of data segment, because it would be 435321b17ecSEdward Tomasz Napierala * impossible to tell whether we've already received the full data 436321b17ecSEdward Tomasz Napierala * segment including padding, or without it. 437321b17ecSEdward Tomasz Napierala */ 438321b17ecSEdward Tomasz Napierala if ((len % 4) != 0) 439321b17ecSEdward Tomasz Napierala len += 4 - (len % 4); 440321b17ecSEdward Tomasz Napierala 441321b17ecSEdward Tomasz Napierala #if 0 442321b17ecSEdward Tomasz Napierala ICL_DEBUG("need %zd bytes of data", len)); 443321b17ecSEdward Tomasz Napierala #endif 444321b17ecSEdward Tomasz Napierala 445321b17ecSEdward Tomasz Napierala return (len); 446321b17ecSEdward Tomasz Napierala } 447321b17ecSEdward Tomasz Napierala 448321b17ecSEdward Tomasz Napierala static int 449321b17ecSEdward Tomasz Napierala icl_pdu_receive_data_segment(struct icl_pdu *request, 450321b17ecSEdward Tomasz Napierala size_t *availablep, bool *more_neededp) 451321b17ecSEdward Tomasz Napierala { 452321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 453321b17ecSEdward Tomasz Napierala size_t len, padding = 0; 454321b17ecSEdward Tomasz Napierala struct mbuf *m; 455321b17ecSEdward Tomasz Napierala 456321b17ecSEdward Tomasz Napierala ic = request->ip_conn; 457321b17ecSEdward Tomasz Napierala 458321b17ecSEdward Tomasz Napierala *more_neededp = false; 459321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 460321b17ecSEdward Tomasz Napierala 461321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 462321b17ecSEdward Tomasz Napierala if (len == 0) 463321b17ecSEdward Tomasz Napierala return (0); 464321b17ecSEdward Tomasz Napierala 465321b17ecSEdward Tomasz Napierala if ((len % 4) != 0) 466321b17ecSEdward Tomasz Napierala padding = 4 - (len % 4); 467321b17ecSEdward Tomasz Napierala 468321b17ecSEdward Tomasz Napierala /* 469321b17ecSEdward Tomasz Napierala * Account for already received parts of data segment. 470321b17ecSEdward Tomasz Napierala */ 471321b17ecSEdward Tomasz Napierala KASSERT(len > request->ip_data_len, ("len <= request->ip_data_len")); 472321b17ecSEdward Tomasz Napierala len -= request->ip_data_len; 473321b17ecSEdward Tomasz Napierala 474321b17ecSEdward Tomasz Napierala if (len + padding > *availablep) { 475321b17ecSEdward Tomasz Napierala /* 476321b17ecSEdward Tomasz Napierala * Not enough data in the socket buffer. Receive as much 477321b17ecSEdward Tomasz Napierala * as we can. Don't receive padding, since, obviously, it's 478321b17ecSEdward Tomasz Napierala * not the end of data segment yet. 479321b17ecSEdward Tomasz Napierala */ 480321b17ecSEdward Tomasz Napierala #if 0 481321b17ecSEdward Tomasz Napierala ICL_DEBUG("limited from %zd to %zd", 482321b17ecSEdward Tomasz Napierala len + padding, *availablep - padding)); 483321b17ecSEdward Tomasz Napierala #endif 484321b17ecSEdward Tomasz Napierala len = *availablep - padding; 485321b17ecSEdward Tomasz Napierala *more_neededp = true; 486321b17ecSEdward Tomasz Napierala padding = 0; 487321b17ecSEdward Tomasz Napierala } 488321b17ecSEdward Tomasz Napierala 489321b17ecSEdward Tomasz Napierala /* 490321b17ecSEdward Tomasz Napierala * Must not try to receive padding without at least one byte 491321b17ecSEdward Tomasz Napierala * of actual data segment. 492321b17ecSEdward Tomasz Napierala */ 493321b17ecSEdward Tomasz Napierala if (len > 0) { 494321b17ecSEdward Tomasz Napierala m = icl_conn_receive(request->ip_conn, len + padding); 495321b17ecSEdward Tomasz Napierala if (m == NULL) { 496321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data segment"); 497321b17ecSEdward Tomasz Napierala return (-1); 498321b17ecSEdward Tomasz Napierala } 499321b17ecSEdward Tomasz Napierala 500321b17ecSEdward Tomasz Napierala if (request->ip_data_mbuf == NULL) 501321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = m; 502321b17ecSEdward Tomasz Napierala else 503321b17ecSEdward Tomasz Napierala m_cat(request->ip_data_mbuf, m); 504321b17ecSEdward Tomasz Napierala 505321b17ecSEdward Tomasz Napierala request->ip_data_len += len; 506321b17ecSEdward Tomasz Napierala *availablep -= len + padding; 507321b17ecSEdward Tomasz Napierala } else 508321b17ecSEdward Tomasz Napierala ICL_DEBUG("len 0"); 509321b17ecSEdward Tomasz Napierala 510321b17ecSEdward Tomasz Napierala if (*more_neededp) 511321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 512321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(request); 513321b17ecSEdward Tomasz Napierala 514321b17ecSEdward Tomasz Napierala return (0); 515321b17ecSEdward Tomasz Napierala } 516321b17ecSEdward Tomasz Napierala 517321b17ecSEdward Tomasz Napierala static int 518321b17ecSEdward Tomasz Napierala icl_pdu_check_data_digest(struct icl_pdu *request, size_t *availablep) 519321b17ecSEdward Tomasz Napierala { 520321b17ecSEdward Tomasz Napierala uint32_t received_digest, valid_digest; 521321b17ecSEdward Tomasz Napierala 522321b17ecSEdward Tomasz Napierala if (request->ip_conn->ic_data_crc32c == false) 523321b17ecSEdward Tomasz Napierala return (0); 524321b17ecSEdward Tomasz Napierala 525321b17ecSEdward Tomasz Napierala if (request->ip_data_len == 0) 526321b17ecSEdward Tomasz Napierala return (0); 527321b17ecSEdward Tomasz Napierala 528d0d587c7SAlexander Motin CTASSERT(sizeof(received_digest) == ISCSI_DATA_DIGEST_SIZE); 529d0d587c7SAlexander Motin if (icl_conn_receive_buf(request->ip_conn, 530d0d587c7SAlexander Motin &received_digest, ISCSI_DATA_DIGEST_SIZE)) { 531321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data digest"); 532321b17ecSEdward Tomasz Napierala return (-1); 533321b17ecSEdward Tomasz Napierala } 534321b17ecSEdward Tomasz Napierala *availablep -= ISCSI_DATA_DIGEST_SIZE; 535321b17ecSEdward Tomasz Napierala 536321b17ecSEdward Tomasz Napierala /* 537321b17ecSEdward Tomasz Napierala * Note that ip_data_mbuf also contains padding; since digest 538321b17ecSEdward Tomasz Napierala * calculation is supposed to include that, we iterate over 539321b17ecSEdward Tomasz Napierala * the entire ip_data_mbuf chain, not just ip_data_len bytes of it. 540321b17ecSEdward Tomasz Napierala */ 541321b17ecSEdward Tomasz Napierala valid_digest = icl_mbuf_to_crc32c(request->ip_data_mbuf); 542321b17ecSEdward Tomasz Napierala if (received_digest != valid_digest) { 543321b17ecSEdward Tomasz Napierala ICL_WARN("data digest check failed; got 0x%x, " 544321b17ecSEdward Tomasz Napierala "should be 0x%x", received_digest, valid_digest); 545321b17ecSEdward Tomasz Napierala return (-1); 546321b17ecSEdward Tomasz Napierala } 547321b17ecSEdward Tomasz Napierala 548321b17ecSEdward Tomasz Napierala return (0); 549321b17ecSEdward Tomasz Napierala } 550321b17ecSEdward Tomasz Napierala 551321b17ecSEdward Tomasz Napierala /* 552321b17ecSEdward Tomasz Napierala * Somewhat contrary to the name, this attempts to receive only one 553321b17ecSEdward Tomasz Napierala * "part" of PDU at a time; call it repeatedly until it returns non-NULL. 554321b17ecSEdward Tomasz Napierala */ 555321b17ecSEdward Tomasz Napierala static struct icl_pdu * 556321b17ecSEdward Tomasz Napierala icl_conn_receive_pdu(struct icl_conn *ic, size_t *availablep) 557321b17ecSEdward Tomasz Napierala { 558321b17ecSEdward Tomasz Napierala struct icl_pdu *request; 559321b17ecSEdward Tomasz Napierala struct socket *so; 560321b17ecSEdward Tomasz Napierala size_t len; 561321b17ecSEdward Tomasz Napierala int error; 562321b17ecSEdward Tomasz Napierala bool more_needed; 563321b17ecSEdward Tomasz Napierala 564321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 565321b17ecSEdward Tomasz Napierala 566321b17ecSEdward Tomasz Napierala if (ic->ic_receive_state == ICL_CONN_STATE_BHS) { 567321b17ecSEdward Tomasz Napierala KASSERT(ic->ic_receive_pdu == NULL, 568321b17ecSEdward Tomasz Napierala ("ic->ic_receive_pdu != NULL")); 569d0d587c7SAlexander Motin request = icl_soft_conn_new_pdu(ic, M_NOWAIT); 570321b17ecSEdward Tomasz Napierala if (request == NULL) { 571321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to allocate PDU; " 572321b17ecSEdward Tomasz Napierala "dropping connection"); 573321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 574321b17ecSEdward Tomasz Napierala return (NULL); 575321b17ecSEdward Tomasz Napierala } 576321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = request; 577321b17ecSEdward Tomasz Napierala } else { 578321b17ecSEdward Tomasz Napierala KASSERT(ic->ic_receive_pdu != NULL, 579321b17ecSEdward Tomasz Napierala ("ic->ic_receive_pdu == NULL")); 580321b17ecSEdward Tomasz Napierala request = ic->ic_receive_pdu; 581321b17ecSEdward Tomasz Napierala } 582321b17ecSEdward Tomasz Napierala 583321b17ecSEdward Tomasz Napierala if (*availablep < ic->ic_receive_len) { 584321b17ecSEdward Tomasz Napierala #if 0 585321b17ecSEdward Tomasz Napierala ICL_DEBUG("not enough data; need %zd, " 586321b17ecSEdward Tomasz Napierala "have %zd", ic->ic_receive_len, *availablep); 587321b17ecSEdward Tomasz Napierala #endif 588321b17ecSEdward Tomasz Napierala return (NULL); 589321b17ecSEdward Tomasz Napierala } 590321b17ecSEdward Tomasz Napierala 591321b17ecSEdward Tomasz Napierala switch (ic->ic_receive_state) { 592321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_BHS: 593321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving BHS"); 594321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_bhs(request, availablep); 595321b17ecSEdward Tomasz Napierala if (error != 0) { 596321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive BHS; " 597321b17ecSEdward Tomasz Napierala "dropping connection"); 598321b17ecSEdward Tomasz Napierala break; 599321b17ecSEdward Tomasz Napierala } 600321b17ecSEdward Tomasz Napierala 601321b17ecSEdward Tomasz Napierala /* 602321b17ecSEdward Tomasz Napierala * We don't enforce any limit for AHS length; 603321b17ecSEdward Tomasz Napierala * its length is stored in 8 bit field. 604321b17ecSEdward Tomasz Napierala */ 605321b17ecSEdward Tomasz Napierala 606321b17ecSEdward Tomasz Napierala len = icl_pdu_data_segment_length(request); 607321b17ecSEdward Tomasz Napierala if (len > ic->ic_max_data_segment_length) { 608321b17ecSEdward Tomasz Napierala ICL_WARN("received data segment " 609321b17ecSEdward Tomasz Napierala "length %zd is larger than negotiated " 610321b17ecSEdward Tomasz Napierala "MaxDataSegmentLength %zd; " 611321b17ecSEdward Tomasz Napierala "dropping connection", 612321b17ecSEdward Tomasz Napierala len, ic->ic_max_data_segment_length); 613321b17ecSEdward Tomasz Napierala error = EINVAL; 614321b17ecSEdward Tomasz Napierala break; 615321b17ecSEdward Tomasz Napierala } 616321b17ecSEdward Tomasz Napierala 617321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_AHS; 618321b17ecSEdward Tomasz Napierala ic->ic_receive_len = icl_pdu_ahs_length(request); 619321b17ecSEdward Tomasz Napierala break; 620321b17ecSEdward Tomasz Napierala 621321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_AHS: 622321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving AHS"); 623321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_ahs(request, availablep); 624321b17ecSEdward Tomasz Napierala if (error != 0) { 625321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive AHS; " 626321b17ecSEdward Tomasz Napierala "dropping connection"); 627321b17ecSEdward Tomasz Napierala break; 628321b17ecSEdward Tomasz Napierala } 629321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_HEADER_DIGEST; 630321b17ecSEdward Tomasz Napierala if (ic->ic_header_crc32c == false) 631321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 632321b17ecSEdward Tomasz Napierala else 633321b17ecSEdward Tomasz Napierala ic->ic_receive_len = ISCSI_HEADER_DIGEST_SIZE; 634321b17ecSEdward Tomasz Napierala break; 635321b17ecSEdward Tomasz Napierala 636321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_HEADER_DIGEST: 637321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving header digest"); 638321b17ecSEdward Tomasz Napierala error = icl_pdu_check_header_digest(request, availablep); 639321b17ecSEdward Tomasz Napierala if (error != 0) { 640321b17ecSEdward Tomasz Napierala ICL_DEBUG("header digest failed; " 641321b17ecSEdward Tomasz Napierala "dropping connection"); 642321b17ecSEdward Tomasz Napierala break; 643321b17ecSEdward Tomasz Napierala } 644321b17ecSEdward Tomasz Napierala 645321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_DATA; 646321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 647321b17ecSEdward Tomasz Napierala icl_pdu_data_segment_receive_len(request); 648321b17ecSEdward Tomasz Napierala break; 649321b17ecSEdward Tomasz Napierala 650321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_DATA: 651321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving data segment"); 652321b17ecSEdward Tomasz Napierala error = icl_pdu_receive_data_segment(request, availablep, 653321b17ecSEdward Tomasz Napierala &more_needed); 654321b17ecSEdward Tomasz Napierala if (error != 0) { 655321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to receive data segment;" 656321b17ecSEdward Tomasz Napierala "dropping connection"); 657321b17ecSEdward Tomasz Napierala break; 658321b17ecSEdward Tomasz Napierala } 659321b17ecSEdward Tomasz Napierala 660321b17ecSEdward Tomasz Napierala if (more_needed) 661321b17ecSEdward Tomasz Napierala break; 662321b17ecSEdward Tomasz Napierala 663321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_DATA_DIGEST; 664321b17ecSEdward Tomasz Napierala if (request->ip_data_len == 0 || ic->ic_data_crc32c == false) 665321b17ecSEdward Tomasz Napierala ic->ic_receive_len = 0; 666321b17ecSEdward Tomasz Napierala else 667321b17ecSEdward Tomasz Napierala ic->ic_receive_len = ISCSI_DATA_DIGEST_SIZE; 668321b17ecSEdward Tomasz Napierala break; 669321b17ecSEdward Tomasz Napierala 670321b17ecSEdward Tomasz Napierala case ICL_CONN_STATE_DATA_DIGEST: 671321b17ecSEdward Tomasz Napierala //ICL_DEBUG("receiving data digest"); 672321b17ecSEdward Tomasz Napierala error = icl_pdu_check_data_digest(request, availablep); 673321b17ecSEdward Tomasz Napierala if (error != 0) { 674321b17ecSEdward Tomasz Napierala ICL_DEBUG("data digest failed; " 675321b17ecSEdward Tomasz Napierala "dropping connection"); 676321b17ecSEdward Tomasz Napierala break; 677321b17ecSEdward Tomasz Napierala } 678321b17ecSEdward Tomasz Napierala 679321b17ecSEdward Tomasz Napierala /* 680321b17ecSEdward Tomasz Napierala * We've received complete PDU; reset the receive state machine 681321b17ecSEdward Tomasz Napierala * and return the PDU. 682321b17ecSEdward Tomasz Napierala */ 683321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_BHS; 684321b17ecSEdward Tomasz Napierala ic->ic_receive_len = sizeof(struct iscsi_bhs); 685321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = NULL; 686321b17ecSEdward Tomasz Napierala return (request); 687321b17ecSEdward Tomasz Napierala 688321b17ecSEdward Tomasz Napierala default: 689321b17ecSEdward Tomasz Napierala panic("invalid ic_receive_state %d\n", ic->ic_receive_state); 690321b17ecSEdward Tomasz Napierala } 691321b17ecSEdward Tomasz Napierala 692321b17ecSEdward Tomasz Napierala if (error != 0) { 693321b17ecSEdward Tomasz Napierala /* 694321b17ecSEdward Tomasz Napierala * Don't free the PDU; it's pointed to by ic->ic_receive_pdu 6955aabcd7cSEdward Tomasz Napierala * and will get freed in icl_soft_conn_close(). 696321b17ecSEdward Tomasz Napierala */ 697321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 698321b17ecSEdward Tomasz Napierala } 699321b17ecSEdward Tomasz Napierala 700321b17ecSEdward Tomasz Napierala return (NULL); 701321b17ecSEdward Tomasz Napierala } 702321b17ecSEdward Tomasz Napierala 703321b17ecSEdward Tomasz Napierala static void 704321b17ecSEdward Tomasz Napierala icl_conn_receive_pdus(struct icl_conn *ic, size_t available) 705321b17ecSEdward Tomasz Napierala { 706321b17ecSEdward Tomasz Napierala struct icl_pdu *response; 707321b17ecSEdward Tomasz Napierala struct socket *so; 708321b17ecSEdward Tomasz Napierala 709321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 710321b17ecSEdward Tomasz Napierala 711321b17ecSEdward Tomasz Napierala /* 712321b17ecSEdward Tomasz Napierala * This can never happen; we're careful to only mess with ic->ic_socket 713321b17ecSEdward Tomasz Napierala * pointer when the send/receive threads are not running. 714321b17ecSEdward Tomasz Napierala */ 715321b17ecSEdward Tomasz Napierala KASSERT(so != NULL, ("NULL socket")); 716321b17ecSEdward Tomasz Napierala 717321b17ecSEdward Tomasz Napierala for (;;) { 718321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) 719321b17ecSEdward Tomasz Napierala return; 720321b17ecSEdward Tomasz Napierala 721321b17ecSEdward Tomasz Napierala if (so->so_error != 0) { 722321b17ecSEdward Tomasz Napierala ICL_DEBUG("connection error %d; " 723321b17ecSEdward Tomasz Napierala "dropping connection", so->so_error); 724321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 725321b17ecSEdward Tomasz Napierala return; 726321b17ecSEdward Tomasz Napierala } 727321b17ecSEdward Tomasz Napierala 728321b17ecSEdward Tomasz Napierala /* 729321b17ecSEdward Tomasz Napierala * Loop until we have a complete PDU or there is not enough 730321b17ecSEdward Tomasz Napierala * data in the socket buffer. 731321b17ecSEdward Tomasz Napierala */ 732321b17ecSEdward Tomasz Napierala if (available < ic->ic_receive_len) { 733321b17ecSEdward Tomasz Napierala #if 0 734321b17ecSEdward Tomasz Napierala ICL_DEBUG("not enough data; have %zd, " 735321b17ecSEdward Tomasz Napierala "need %zd", available, 736321b17ecSEdward Tomasz Napierala ic->ic_receive_len); 737321b17ecSEdward Tomasz Napierala #endif 738321b17ecSEdward Tomasz Napierala return; 739321b17ecSEdward Tomasz Napierala } 740321b17ecSEdward Tomasz Napierala 741321b17ecSEdward Tomasz Napierala response = icl_conn_receive_pdu(ic, &available); 742321b17ecSEdward Tomasz Napierala if (response == NULL) 743321b17ecSEdward Tomasz Napierala continue; 744321b17ecSEdward Tomasz Napierala 745321b17ecSEdward Tomasz Napierala if (response->ip_ahs_len > 0) { 746321b17ecSEdward Tomasz Napierala ICL_WARN("received PDU with unsupported " 747321b17ecSEdward Tomasz Napierala "AHS; opcode 0x%x; dropping connection", 748321b17ecSEdward Tomasz Napierala response->ip_bhs->bhs_opcode); 74982f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, response); 750321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 751321b17ecSEdward Tomasz Napierala return; 752321b17ecSEdward Tomasz Napierala } 753321b17ecSEdward Tomasz Napierala 754321b17ecSEdward Tomasz Napierala (ic->ic_receive)(response); 755321b17ecSEdward Tomasz Napierala } 756321b17ecSEdward Tomasz Napierala } 757321b17ecSEdward Tomasz Napierala 758321b17ecSEdward Tomasz Napierala static void 759321b17ecSEdward Tomasz Napierala icl_receive_thread(void *arg) 760321b17ecSEdward Tomasz Napierala { 761321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 762321b17ecSEdward Tomasz Napierala size_t available; 763321b17ecSEdward Tomasz Napierala struct socket *so; 764321b17ecSEdward Tomasz Napierala 765321b17ecSEdward Tomasz Napierala ic = arg; 766321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 767321b17ecSEdward Tomasz Napierala 768321b17ecSEdward Tomasz Napierala for (;;) { 769321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) { 770321b17ecSEdward Tomasz Napierala //ICL_DEBUG("terminating"); 771321b17ecSEdward Tomasz Napierala break; 772321b17ecSEdward Tomasz Napierala } 773321b17ecSEdward Tomasz Napierala 774321b17ecSEdward Tomasz Napierala /* 775321b17ecSEdward Tomasz Napierala * Set the low watermark, to be checked by 776321b17ecSEdward Tomasz Napierala * soreadable() in icl_soupcall_receive() 777266078c6SPedro F. Giffuni * to avoid unnecessary wakeups until there 778321b17ecSEdward Tomasz Napierala * is enough data received to read the PDU. 779321b17ecSEdward Tomasz Napierala */ 780321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_rcv); 781321b17ecSEdward Tomasz Napierala available = sbavail(&so->so_rcv); 782321b17ecSEdward Tomasz Napierala if (available < ic->ic_receive_len) { 783321b17ecSEdward Tomasz Napierala so->so_rcv.sb_lowat = ic->ic_receive_len; 784321b17ecSEdward Tomasz Napierala cv_wait(&ic->ic_receive_cv, &so->so_rcv.sb_mtx); 785321b17ecSEdward Tomasz Napierala } else 786321b17ecSEdward Tomasz Napierala so->so_rcv.sb_lowat = so->so_rcv.sb_hiwat + 1; 787321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_rcv); 788321b17ecSEdward Tomasz Napierala 789321b17ecSEdward Tomasz Napierala icl_conn_receive_pdus(ic, available); 790321b17ecSEdward Tomasz Napierala } 791321b17ecSEdward Tomasz Napierala 792321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 793321b17ecSEdward Tomasz Napierala ic->ic_receive_running = false; 794321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 795321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 796321b17ecSEdward Tomasz Napierala kthread_exit(); 797321b17ecSEdward Tomasz Napierala } 798321b17ecSEdward Tomasz Napierala 799321b17ecSEdward Tomasz Napierala static int 800321b17ecSEdward Tomasz Napierala icl_soupcall_receive(struct socket *so, void *arg, int waitflag) 801321b17ecSEdward Tomasz Napierala { 802321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 803321b17ecSEdward Tomasz Napierala 804321b17ecSEdward Tomasz Napierala if (!soreadable(so)) 805321b17ecSEdward Tomasz Napierala return (SU_OK); 806321b17ecSEdward Tomasz Napierala 807321b17ecSEdward Tomasz Napierala ic = arg; 808321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_receive_cv); 809321b17ecSEdward Tomasz Napierala return (SU_OK); 810321b17ecSEdward Tomasz Napierala } 811321b17ecSEdward Tomasz Napierala 812321b17ecSEdward Tomasz Napierala static int 813321b17ecSEdward Tomasz Napierala icl_pdu_finalize(struct icl_pdu *request) 814321b17ecSEdward Tomasz Napierala { 815321b17ecSEdward Tomasz Napierala size_t padding, pdu_len; 816321b17ecSEdward Tomasz Napierala uint32_t digest, zero = 0; 817321b17ecSEdward Tomasz Napierala int ok; 818321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 819321b17ecSEdward Tomasz Napierala 820321b17ecSEdward Tomasz Napierala ic = request->ip_conn; 821321b17ecSEdward Tomasz Napierala 822321b17ecSEdward Tomasz Napierala icl_pdu_set_data_segment_length(request, request->ip_data_len); 823321b17ecSEdward Tomasz Napierala 824321b17ecSEdward Tomasz Napierala pdu_len = icl_pdu_size(request); 825321b17ecSEdward Tomasz Napierala 826321b17ecSEdward Tomasz Napierala if (ic->ic_header_crc32c) { 827321b17ecSEdward Tomasz Napierala digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf); 828321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_bhs_mbuf, sizeof(digest), 829321b17ecSEdward Tomasz Napierala (void *)&digest); 830321b17ecSEdward Tomasz Napierala if (ok != 1) { 831321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append header digest"); 832321b17ecSEdward Tomasz Napierala return (1); 833321b17ecSEdward Tomasz Napierala } 834321b17ecSEdward Tomasz Napierala } 835321b17ecSEdward Tomasz Napierala 836321b17ecSEdward Tomasz Napierala if (request->ip_data_len != 0) { 837321b17ecSEdward Tomasz Napierala padding = icl_pdu_padding(request); 838321b17ecSEdward Tomasz Napierala if (padding > 0) { 839321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_data_mbuf, padding, 840321b17ecSEdward Tomasz Napierala (void *)&zero); 841321b17ecSEdward Tomasz Napierala if (ok != 1) { 842321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append padding"); 843321b17ecSEdward Tomasz Napierala return (1); 844321b17ecSEdward Tomasz Napierala } 845321b17ecSEdward Tomasz Napierala } 846321b17ecSEdward Tomasz Napierala 847321b17ecSEdward Tomasz Napierala if (ic->ic_data_crc32c) { 848321b17ecSEdward Tomasz Napierala digest = icl_mbuf_to_crc32c(request->ip_data_mbuf); 849321b17ecSEdward Tomasz Napierala 850321b17ecSEdward Tomasz Napierala ok = m_append(request->ip_data_mbuf, sizeof(digest), 851321b17ecSEdward Tomasz Napierala (void *)&digest); 852321b17ecSEdward Tomasz Napierala if (ok != 1) { 853321b17ecSEdward Tomasz Napierala ICL_WARN("failed to append data digest"); 854321b17ecSEdward Tomasz Napierala return (1); 855321b17ecSEdward Tomasz Napierala } 856321b17ecSEdward Tomasz Napierala } 857321b17ecSEdward Tomasz Napierala 858321b17ecSEdward Tomasz Napierala m_cat(request->ip_bhs_mbuf, request->ip_data_mbuf); 859321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = NULL; 860321b17ecSEdward Tomasz Napierala } 861321b17ecSEdward Tomasz Napierala 862321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf->m_pkthdr.len = pdu_len; 863321b17ecSEdward Tomasz Napierala 864321b17ecSEdward Tomasz Napierala return (0); 865321b17ecSEdward Tomasz Napierala } 866321b17ecSEdward Tomasz Napierala 867321b17ecSEdward Tomasz Napierala static void 868321b17ecSEdward Tomasz Napierala icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue) 869321b17ecSEdward Tomasz Napierala { 870321b17ecSEdward Tomasz Napierala struct icl_pdu *request, *request2; 871321b17ecSEdward Tomasz Napierala struct socket *so; 872605703b5SAlexander Motin long available, size, size2; 873321b17ecSEdward Tomasz Napierala int coalesced, error; 874321b17ecSEdward Tomasz Napierala 875321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 876321b17ecSEdward Tomasz Napierala 877321b17ecSEdward Tomasz Napierala so = ic->ic_socket; 878321b17ecSEdward Tomasz Napierala 879321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_snd); 880321b17ecSEdward Tomasz Napierala /* 881321b17ecSEdward Tomasz Napierala * Check how much space do we have for transmit. We can't just 882321b17ecSEdward Tomasz Napierala * call sosend() and retry when we get EWOULDBLOCK or EMSGSIZE, 883321b17ecSEdward Tomasz Napierala * as it always frees the mbuf chain passed to it, even in case 884321b17ecSEdward Tomasz Napierala * of error. 885321b17ecSEdward Tomasz Napierala */ 886321b17ecSEdward Tomasz Napierala available = sbspace(&so->so_snd); 887321b17ecSEdward Tomasz Napierala 888321b17ecSEdward Tomasz Napierala /* 889321b17ecSEdward Tomasz Napierala * Notify the socket upcall that we don't need wakeups 890321b17ecSEdward Tomasz Napierala * for the time being. 891321b17ecSEdward Tomasz Napierala */ 892321b17ecSEdward Tomasz Napierala so->so_snd.sb_lowat = so->so_snd.sb_hiwat + 1; 893321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 894321b17ecSEdward Tomasz Napierala 895321b17ecSEdward Tomasz Napierala while (!STAILQ_EMPTY(queue)) { 896321b17ecSEdward Tomasz Napierala request = STAILQ_FIRST(queue); 897321b17ecSEdward Tomasz Napierala size = icl_pdu_size(request); 898321b17ecSEdward Tomasz Napierala if (available < size) { 899321b17ecSEdward Tomasz Napierala 900321b17ecSEdward Tomasz Napierala /* 901321b17ecSEdward Tomasz Napierala * Set the low watermark, to be checked by 902321b17ecSEdward Tomasz Napierala * sowriteable() in icl_soupcall_send() 903266078c6SPedro F. Giffuni * to avoid unnecessary wakeups until there 904321b17ecSEdward Tomasz Napierala * is enough space for the PDU to fit. 905321b17ecSEdward Tomasz Napierala */ 906321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&so->so_snd); 907321b17ecSEdward Tomasz Napierala available = sbspace(&so->so_snd); 908321b17ecSEdward Tomasz Napierala if (available < size) { 909321b17ecSEdward Tomasz Napierala #if 1 910321b17ecSEdward Tomasz Napierala ICL_DEBUG("no space to send; " 911605703b5SAlexander Motin "have %ld, need %ld", 912321b17ecSEdward Tomasz Napierala available, size); 913321b17ecSEdward Tomasz Napierala #endif 914321b17ecSEdward Tomasz Napierala so->so_snd.sb_lowat = size; 915321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 916321b17ecSEdward Tomasz Napierala return; 917321b17ecSEdward Tomasz Napierala } 918321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&so->so_snd); 919321b17ecSEdward Tomasz Napierala } 920321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(queue, ip_next); 921321b17ecSEdward Tomasz Napierala error = icl_pdu_finalize(request); 922321b17ecSEdward Tomasz Napierala if (error != 0) { 923321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to finalize PDU; " 924321b17ecSEdward Tomasz Napierala "dropping connection"); 92582f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, request); 926321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 927321b17ecSEdward Tomasz Napierala return; 928321b17ecSEdward Tomasz Napierala } 929321b17ecSEdward Tomasz Napierala if (coalesce) { 930321b17ecSEdward Tomasz Napierala coalesced = 1; 931321b17ecSEdward Tomasz Napierala for (;;) { 932321b17ecSEdward Tomasz Napierala request2 = STAILQ_FIRST(queue); 933321b17ecSEdward Tomasz Napierala if (request2 == NULL) 934321b17ecSEdward Tomasz Napierala break; 935321b17ecSEdward Tomasz Napierala size2 = icl_pdu_size(request2); 936321b17ecSEdward Tomasz Napierala if (available < size + size2) 937321b17ecSEdward Tomasz Napierala break; 938321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(queue, ip_next); 939321b17ecSEdward Tomasz Napierala error = icl_pdu_finalize(request2); 940321b17ecSEdward Tomasz Napierala if (error != 0) { 941321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to finalize PDU; " 942321b17ecSEdward Tomasz Napierala "dropping connection"); 94382f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, request); 94482f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, request2); 945321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 946321b17ecSEdward Tomasz Napierala return; 947321b17ecSEdward Tomasz Napierala } 948321b17ecSEdward Tomasz Napierala m_cat(request->ip_bhs_mbuf, request2->ip_bhs_mbuf); 949321b17ecSEdward Tomasz Napierala request2->ip_bhs_mbuf = NULL; 950321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf->m_pkthdr.len += size2; 951321b17ecSEdward Tomasz Napierala size += size2; 952321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_AFTER(queue, request, ip_next); 95382f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, request2); 954321b17ecSEdward Tomasz Napierala coalesced++; 955321b17ecSEdward Tomasz Napierala } 956321b17ecSEdward Tomasz Napierala #if 0 957321b17ecSEdward Tomasz Napierala if (coalesced > 1) { 958605703b5SAlexander Motin ICL_DEBUG("coalesced %d PDUs into %ld bytes", 959321b17ecSEdward Tomasz Napierala coalesced, size); 960321b17ecSEdward Tomasz Napierala } 961321b17ecSEdward Tomasz Napierala #endif 962321b17ecSEdward Tomasz Napierala } 963321b17ecSEdward Tomasz Napierala available -= size; 964321b17ecSEdward Tomasz Napierala error = sosend(so, NULL, NULL, request->ip_bhs_mbuf, 965321b17ecSEdward Tomasz Napierala NULL, MSG_DONTWAIT, curthread); 966321b17ecSEdward Tomasz Napierala request->ip_bhs_mbuf = NULL; /* Sosend consumes the mbuf. */ 967321b17ecSEdward Tomasz Napierala if (error != 0) { 968321b17ecSEdward Tomasz Napierala ICL_DEBUG("failed to send PDU, error %d; " 969321b17ecSEdward Tomasz Napierala "dropping connection", error); 97082f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, request); 971321b17ecSEdward Tomasz Napierala icl_conn_fail(ic); 972321b17ecSEdward Tomasz Napierala return; 973321b17ecSEdward Tomasz Napierala } 97482f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, request); 975321b17ecSEdward Tomasz Napierala } 976321b17ecSEdward Tomasz Napierala } 977321b17ecSEdward Tomasz Napierala 978321b17ecSEdward Tomasz Napierala static void 979321b17ecSEdward Tomasz Napierala icl_send_thread(void *arg) 980321b17ecSEdward Tomasz Napierala { 981321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 982321b17ecSEdward Tomasz Napierala struct icl_pdu_stailq queue; 983321b17ecSEdward Tomasz Napierala 984321b17ecSEdward Tomasz Napierala ic = arg; 985321b17ecSEdward Tomasz Napierala 986321b17ecSEdward Tomasz Napierala STAILQ_INIT(&queue); 987321b17ecSEdward Tomasz Napierala 988321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 989321b17ecSEdward Tomasz Napierala for (;;) { 990321b17ecSEdward Tomasz Napierala for (;;) { 991321b17ecSEdward Tomasz Napierala /* 992321b17ecSEdward Tomasz Napierala * If the local queue is empty, populate it from 993321b17ecSEdward Tomasz Napierala * the main one. This way the icl_conn_send_pdus() 994321b17ecSEdward Tomasz Napierala * can go through all the queued PDUs without holding 995321b17ecSEdward Tomasz Napierala * any locks. 996321b17ecSEdward Tomasz Napierala */ 997321b17ecSEdward Tomasz Napierala if (STAILQ_EMPTY(&queue)) 998321b17ecSEdward Tomasz Napierala STAILQ_SWAP(&ic->ic_to_send, &queue, icl_pdu); 999321b17ecSEdward Tomasz Napierala 1000321b17ecSEdward Tomasz Napierala ic->ic_check_send_space = false; 1001321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1002321b17ecSEdward Tomasz Napierala icl_conn_send_pdus(ic, &queue); 1003321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1004321b17ecSEdward Tomasz Napierala 1005321b17ecSEdward Tomasz Napierala /* 1006321b17ecSEdward Tomasz Napierala * The icl_soupcall_send() was called since the last 1007321b17ecSEdward Tomasz Napierala * call to sbspace(); go around; 1008321b17ecSEdward Tomasz Napierala */ 1009321b17ecSEdward Tomasz Napierala if (ic->ic_check_send_space) 1010321b17ecSEdward Tomasz Napierala continue; 1011321b17ecSEdward Tomasz Napierala 1012321b17ecSEdward Tomasz Napierala /* 1013321b17ecSEdward Tomasz Napierala * Local queue is empty, but we still have PDUs 1014321b17ecSEdward Tomasz Napierala * in the main one; go around. 1015321b17ecSEdward Tomasz Napierala */ 1016321b17ecSEdward Tomasz Napierala if (STAILQ_EMPTY(&queue) && 1017321b17ecSEdward Tomasz Napierala !STAILQ_EMPTY(&ic->ic_to_send)) 1018321b17ecSEdward Tomasz Napierala continue; 1019321b17ecSEdward Tomasz Napierala 1020321b17ecSEdward Tomasz Napierala /* 1021321b17ecSEdward Tomasz Napierala * There might be some stuff in the local queue, 1022321b17ecSEdward Tomasz Napierala * which didn't get sent due to not having enough send 1023321b17ecSEdward Tomasz Napierala * space. Wait for socket upcall. 1024321b17ecSEdward Tomasz Napierala */ 1025321b17ecSEdward Tomasz Napierala break; 1026321b17ecSEdward Tomasz Napierala } 1027321b17ecSEdward Tomasz Napierala 1028321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting) { 1029321b17ecSEdward Tomasz Napierala //ICL_DEBUG("terminating"); 1030321b17ecSEdward Tomasz Napierala break; 1031321b17ecSEdward Tomasz Napierala } 1032321b17ecSEdward Tomasz Napierala 1033321b17ecSEdward Tomasz Napierala cv_wait(&ic->ic_send_cv, ic->ic_lock); 1034321b17ecSEdward Tomasz Napierala } 1035321b17ecSEdward Tomasz Napierala 1036321b17ecSEdward Tomasz Napierala /* 1037321b17ecSEdward Tomasz Napierala * We're exiting; move PDUs back to the main queue, so they can 1038321b17ecSEdward Tomasz Napierala * get freed properly. At this point ordering doesn't matter. 1039321b17ecSEdward Tomasz Napierala */ 1040321b17ecSEdward Tomasz Napierala STAILQ_CONCAT(&ic->ic_to_send, &queue); 1041321b17ecSEdward Tomasz Napierala 1042321b17ecSEdward Tomasz Napierala ic->ic_send_running = false; 1043321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1044321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1045321b17ecSEdward Tomasz Napierala kthread_exit(); 1046321b17ecSEdward Tomasz Napierala } 1047321b17ecSEdward Tomasz Napierala 1048321b17ecSEdward Tomasz Napierala static int 1049321b17ecSEdward Tomasz Napierala icl_soupcall_send(struct socket *so, void *arg, int waitflag) 1050321b17ecSEdward Tomasz Napierala { 1051321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1052321b17ecSEdward Tomasz Napierala 1053321b17ecSEdward Tomasz Napierala if (!sowriteable(so)) 1054321b17ecSEdward Tomasz Napierala return (SU_OK); 1055321b17ecSEdward Tomasz Napierala 1056321b17ecSEdward Tomasz Napierala ic = arg; 1057321b17ecSEdward Tomasz Napierala 1058321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1059321b17ecSEdward Tomasz Napierala ic->ic_check_send_space = true; 1060321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1061321b17ecSEdward Tomasz Napierala 1062321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1063321b17ecSEdward Tomasz Napierala 1064321b17ecSEdward Tomasz Napierala return (SU_OK); 1065321b17ecSEdward Tomasz Napierala } 1066321b17ecSEdward Tomasz Napierala 1067321b17ecSEdward Tomasz Napierala static int 106882f7fa7aSAlexander Motin icl_soft_conn_pdu_append_data(struct icl_conn *ic, struct icl_pdu *request, 106982f7fa7aSAlexander Motin const void *addr, size_t len, int flags) 1070321b17ecSEdward Tomasz Napierala { 1071321b17ecSEdward Tomasz Napierala struct mbuf *mb, *newmb; 1072321b17ecSEdward Tomasz Napierala size_t copylen, off = 0; 1073321b17ecSEdward Tomasz Napierala 1074321b17ecSEdward Tomasz Napierala KASSERT(len > 0, ("len == 0")); 1075321b17ecSEdward Tomasz Napierala 1076898fd11fSAlexander Motin newmb = m_getm2(NULL, len, flags, MT_DATA, 0); 1077321b17ecSEdward Tomasz Napierala if (newmb == NULL) { 1078321b17ecSEdward Tomasz Napierala ICL_WARN("failed to allocate mbuf for %zd bytes", len); 1079321b17ecSEdward Tomasz Napierala return (ENOMEM); 1080321b17ecSEdward Tomasz Napierala } 1081321b17ecSEdward Tomasz Napierala 1082321b17ecSEdward Tomasz Napierala for (mb = newmb; mb != NULL; mb = mb->m_next) { 1083321b17ecSEdward Tomasz Napierala copylen = min(M_TRAILINGSPACE(mb), len - off); 1084321b17ecSEdward Tomasz Napierala memcpy(mtod(mb, char *), (const char *)addr + off, copylen); 1085321b17ecSEdward Tomasz Napierala mb->m_len = copylen; 1086321b17ecSEdward Tomasz Napierala off += copylen; 1087321b17ecSEdward Tomasz Napierala } 1088321b17ecSEdward Tomasz Napierala KASSERT(off == len, ("%s: off != len", __func__)); 1089321b17ecSEdward Tomasz Napierala 1090321b17ecSEdward Tomasz Napierala if (request->ip_data_mbuf == NULL) { 1091321b17ecSEdward Tomasz Napierala request->ip_data_mbuf = newmb; 1092321b17ecSEdward Tomasz Napierala request->ip_data_len = len; 1093321b17ecSEdward Tomasz Napierala } else { 1094321b17ecSEdward Tomasz Napierala m_cat(request->ip_data_mbuf, newmb); 1095321b17ecSEdward Tomasz Napierala request->ip_data_len += len; 1096321b17ecSEdward Tomasz Napierala } 1097321b17ecSEdward Tomasz Napierala 1098321b17ecSEdward Tomasz Napierala return (0); 1099321b17ecSEdward Tomasz Napierala } 1100321b17ecSEdward Tomasz Napierala 1101321b17ecSEdward Tomasz Napierala void 1102321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_get_data(struct icl_conn *ic, struct icl_pdu *ip, 1103321b17ecSEdward Tomasz Napierala size_t off, void *addr, size_t len) 1104321b17ecSEdward Tomasz Napierala { 1105321b17ecSEdward Tomasz Napierala 110682f7fa7aSAlexander Motin m_copydata(ip->ip_data_mbuf, off, len, addr); 1107321b17ecSEdward Tomasz Napierala } 1108321b17ecSEdward Tomasz Napierala 1109321b17ecSEdward Tomasz Napierala static void 1110321b17ecSEdward Tomasz Napierala icl_pdu_queue(struct icl_pdu *ip) 1111321b17ecSEdward Tomasz Napierala { 1112321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1113321b17ecSEdward Tomasz Napierala 1114321b17ecSEdward Tomasz Napierala ic = ip->ip_conn; 1115321b17ecSEdward Tomasz Napierala 1116321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT(ic); 1117321b17ecSEdward Tomasz Napierala 1118321b17ecSEdward Tomasz Napierala if (ic->ic_disconnecting || ic->ic_socket == NULL) { 1119321b17ecSEdward Tomasz Napierala ICL_DEBUG("icl_pdu_queue on closed connection"); 112082f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ip); 1121321b17ecSEdward Tomasz Napierala return; 1122321b17ecSEdward Tomasz Napierala } 1123321b17ecSEdward Tomasz Napierala 1124321b17ecSEdward Tomasz Napierala if (!STAILQ_EMPTY(&ic->ic_to_send)) { 1125321b17ecSEdward Tomasz Napierala STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next); 1126321b17ecSEdward Tomasz Napierala /* 1127321b17ecSEdward Tomasz Napierala * If the queue is not empty, someone else had already 1128321b17ecSEdward Tomasz Napierala * signaled the send thread; no need to do that again, 1129321b17ecSEdward Tomasz Napierala * just return. 1130321b17ecSEdward Tomasz Napierala */ 1131321b17ecSEdward Tomasz Napierala return; 1132321b17ecSEdward Tomasz Napierala } 1133321b17ecSEdward Tomasz Napierala 1134321b17ecSEdward Tomasz Napierala STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next); 1135321b17ecSEdward Tomasz Napierala cv_signal(&ic->ic_send_cv); 1136321b17ecSEdward Tomasz Napierala } 1137321b17ecSEdward Tomasz Napierala 1138321b17ecSEdward Tomasz Napierala void 1139321b17ecSEdward Tomasz Napierala icl_soft_conn_pdu_queue(struct icl_conn *ic, struct icl_pdu *ip) 1140321b17ecSEdward Tomasz Napierala { 1141321b17ecSEdward Tomasz Napierala 1142321b17ecSEdward Tomasz Napierala icl_pdu_queue(ip); 1143321b17ecSEdward Tomasz Napierala } 1144321b17ecSEdward Tomasz Napierala 1145321b17ecSEdward Tomasz Napierala static struct icl_conn * 1146321b17ecSEdward Tomasz Napierala icl_soft_new_conn(const char *name, struct mtx *lock) 1147321b17ecSEdward Tomasz Napierala { 1148321b17ecSEdward Tomasz Napierala struct icl_conn *ic; 1149321b17ecSEdward Tomasz Napierala 1150321b17ecSEdward Tomasz Napierala refcount_acquire(&icl_ncons); 1151321b17ecSEdward Tomasz Napierala 1152321b17ecSEdward Tomasz Napierala ic = (struct icl_conn *)kobj_create(&icl_soft_class, M_ICL_SOFT, M_WAITOK | M_ZERO); 1153321b17ecSEdward Tomasz Napierala 1154321b17ecSEdward Tomasz Napierala STAILQ_INIT(&ic->ic_to_send); 1155321b17ecSEdward Tomasz Napierala ic->ic_lock = lock; 1156321b17ecSEdward Tomasz Napierala cv_init(&ic->ic_send_cv, "icl_tx"); 1157321b17ecSEdward Tomasz Napierala cv_init(&ic->ic_receive_cv, "icl_rx"); 1158321b17ecSEdward Tomasz Napierala #ifdef DIAGNOSTIC 1159321b17ecSEdward Tomasz Napierala refcount_init(&ic->ic_outstanding_pdus, 0); 1160321b17ecSEdward Tomasz Napierala #endif 1161321b17ecSEdward Tomasz Napierala ic->ic_max_data_segment_length = ICL_MAX_DATA_SEGMENT_LENGTH; 1162321b17ecSEdward Tomasz Napierala ic->ic_name = name; 1163d4b195d3SEdward Tomasz Napierala ic->ic_offload = "None"; 11647deb68abSEdward Tomasz Napierala ic->ic_unmapped = false; 1165321b17ecSEdward Tomasz Napierala 1166321b17ecSEdward Tomasz Napierala return (ic); 1167321b17ecSEdward Tomasz Napierala } 1168321b17ecSEdward Tomasz Napierala 1169321b17ecSEdward Tomasz Napierala void 1170321b17ecSEdward Tomasz Napierala icl_soft_conn_free(struct icl_conn *ic) 1171321b17ecSEdward Tomasz Napierala { 1172321b17ecSEdward Tomasz Napierala 1173*22d3bb26SEdward Tomasz Napierala #ifdef DIAGNOSTIC 1174*22d3bb26SEdward Tomasz Napierala KASSERT(ic->ic_outstanding_pdus == 0, 1175*22d3bb26SEdward Tomasz Napierala ("destroying session with %d outstanding PDUs", 1176*22d3bb26SEdward Tomasz Napierala ic->ic_outstanding_pdus)); 1177*22d3bb26SEdward Tomasz Napierala #endif 1178321b17ecSEdward Tomasz Napierala cv_destroy(&ic->ic_send_cv); 1179321b17ecSEdward Tomasz Napierala cv_destroy(&ic->ic_receive_cv); 1180321b17ecSEdward Tomasz Napierala kobj_delete((struct kobj *)ic, M_ICL_SOFT); 1181321b17ecSEdward Tomasz Napierala refcount_release(&icl_ncons); 1182321b17ecSEdward Tomasz Napierala } 1183321b17ecSEdward Tomasz Napierala 1184321b17ecSEdward Tomasz Napierala static int 1185321b17ecSEdward Tomasz Napierala icl_conn_start(struct icl_conn *ic) 1186321b17ecSEdward Tomasz Napierala { 1187321b17ecSEdward Tomasz Napierala size_t minspace; 1188321b17ecSEdward Tomasz Napierala struct sockopt opt; 1189321b17ecSEdward Tomasz Napierala int error, one = 1; 1190321b17ecSEdward Tomasz Napierala 1191321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1192321b17ecSEdward Tomasz Napierala 1193321b17ecSEdward Tomasz Napierala /* 1194321b17ecSEdward Tomasz Napierala * XXX: Ugly hack. 1195321b17ecSEdward Tomasz Napierala */ 1196321b17ecSEdward Tomasz Napierala if (ic->ic_socket == NULL) { 1197321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1198321b17ecSEdward Tomasz Napierala return (EINVAL); 1199321b17ecSEdward Tomasz Napierala } 1200321b17ecSEdward Tomasz Napierala 1201321b17ecSEdward Tomasz Napierala ic->ic_receive_state = ICL_CONN_STATE_BHS; 1202321b17ecSEdward Tomasz Napierala ic->ic_receive_len = sizeof(struct iscsi_bhs); 1203321b17ecSEdward Tomasz Napierala ic->ic_disconnecting = false; 1204321b17ecSEdward Tomasz Napierala 1205321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1206321b17ecSEdward Tomasz Napierala 1207321b17ecSEdward Tomasz Napierala /* 1208321b17ecSEdward Tomasz Napierala * For sendspace, this is required because the current code cannot 1209321b17ecSEdward Tomasz Napierala * send a PDU in pieces; thus, the minimum buffer size is equal 1210321b17ecSEdward Tomasz Napierala * to the maximum PDU size. "+4" is to account for possible padding. 1211321b17ecSEdward Tomasz Napierala * 1212321b17ecSEdward Tomasz Napierala * What we should actually do here is to use autoscaling, but set 1213321b17ecSEdward Tomasz Napierala * some minimal buffer size to "minspace". I don't know a way to do 1214321b17ecSEdward Tomasz Napierala * that, though. 1215321b17ecSEdward Tomasz Napierala */ 1216321b17ecSEdward Tomasz Napierala minspace = sizeof(struct iscsi_bhs) + ic->ic_max_data_segment_length + 1217321b17ecSEdward Tomasz Napierala ISCSI_HEADER_DIGEST_SIZE + ISCSI_DATA_DIGEST_SIZE + 4; 1218321b17ecSEdward Tomasz Napierala if (sendspace < minspace) { 1219321b17ecSEdward Tomasz Napierala ICL_WARN("kern.icl.sendspace too low; must be at least %zd", 1220321b17ecSEdward Tomasz Napierala minspace); 1221321b17ecSEdward Tomasz Napierala sendspace = minspace; 1222321b17ecSEdward Tomasz Napierala } 1223321b17ecSEdward Tomasz Napierala if (recvspace < minspace) { 1224321b17ecSEdward Tomasz Napierala ICL_WARN("kern.icl.recvspace too low; must be at least %zd", 1225321b17ecSEdward Tomasz Napierala minspace); 1226321b17ecSEdward Tomasz Napierala recvspace = minspace; 1227321b17ecSEdward Tomasz Napierala } 1228321b17ecSEdward Tomasz Napierala 1229321b17ecSEdward Tomasz Napierala error = soreserve(ic->ic_socket, sendspace, recvspace); 1230321b17ecSEdward Tomasz Napierala if (error != 0) { 1231321b17ecSEdward Tomasz Napierala ICL_WARN("soreserve failed with error %d", error); 12325aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(ic); 1233321b17ecSEdward Tomasz Napierala return (error); 1234321b17ecSEdward Tomasz Napierala } 1235321b17ecSEdward Tomasz Napierala ic->ic_socket->so_snd.sb_flags |= SB_AUTOSIZE; 1236321b17ecSEdward Tomasz Napierala ic->ic_socket->so_rcv.sb_flags |= SB_AUTOSIZE; 1237321b17ecSEdward Tomasz Napierala 1238321b17ecSEdward Tomasz Napierala /* 1239321b17ecSEdward Tomasz Napierala * Disable Nagle. 1240321b17ecSEdward Tomasz Napierala */ 1241321b17ecSEdward Tomasz Napierala bzero(&opt, sizeof(opt)); 1242321b17ecSEdward Tomasz Napierala opt.sopt_dir = SOPT_SET; 1243321b17ecSEdward Tomasz Napierala opt.sopt_level = IPPROTO_TCP; 1244321b17ecSEdward Tomasz Napierala opt.sopt_name = TCP_NODELAY; 1245321b17ecSEdward Tomasz Napierala opt.sopt_val = &one; 1246321b17ecSEdward Tomasz Napierala opt.sopt_valsize = sizeof(one); 1247321b17ecSEdward Tomasz Napierala error = sosetopt(ic->ic_socket, &opt); 1248321b17ecSEdward Tomasz Napierala if (error != 0) { 1249321b17ecSEdward Tomasz Napierala ICL_WARN("disabling TCP_NODELAY failed with error %d", error); 12505aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(ic); 1251321b17ecSEdward Tomasz Napierala return (error); 1252321b17ecSEdward Tomasz Napierala } 1253321b17ecSEdward Tomasz Napierala 1254321b17ecSEdward Tomasz Napierala /* 1255321b17ecSEdward Tomasz Napierala * Register socket upcall, to get notified about incoming PDUs 1256321b17ecSEdward Tomasz Napierala * and free space to send outgoing ones. 1257321b17ecSEdward Tomasz Napierala */ 1258321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&ic->ic_socket->so_snd); 1259321b17ecSEdward Tomasz Napierala soupcall_set(ic->ic_socket, SO_SND, icl_soupcall_send, ic); 1260321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&ic->ic_socket->so_snd); 1261321b17ecSEdward Tomasz Napierala SOCKBUF_LOCK(&ic->ic_socket->so_rcv); 1262321b17ecSEdward Tomasz Napierala soupcall_set(ic->ic_socket, SO_RCV, icl_soupcall_receive, ic); 1263321b17ecSEdward Tomasz Napierala SOCKBUF_UNLOCK(&ic->ic_socket->so_rcv); 1264321b17ecSEdward Tomasz Napierala 12655b157f21SAlexander Motin /* 12665b157f21SAlexander Motin * Start threads. 12675b157f21SAlexander Motin */ 12685b157f21SAlexander Motin ICL_CONN_LOCK(ic); 12695b157f21SAlexander Motin ic->ic_send_running = ic->ic_receive_running = true; 12705b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 12715b157f21SAlexander Motin error = kthread_add(icl_send_thread, ic, NULL, NULL, 0, 0, "%stx", 12725b157f21SAlexander Motin ic->ic_name); 12735b157f21SAlexander Motin if (error != 0) { 12745b157f21SAlexander Motin ICL_WARN("kthread_add(9) failed with error %d", error); 12755b157f21SAlexander Motin ICL_CONN_LOCK(ic); 12765b157f21SAlexander Motin ic->ic_send_running = ic->ic_receive_running = false; 12775b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 12785b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 12795b157f21SAlexander Motin icl_soft_conn_close(ic); 12805b157f21SAlexander Motin return (error); 12815b157f21SAlexander Motin } 12825b157f21SAlexander Motin error = kthread_add(icl_receive_thread, ic, NULL, NULL, 0, 0, "%srx", 12835b157f21SAlexander Motin ic->ic_name); 12845b157f21SAlexander Motin if (error != 0) { 12855b157f21SAlexander Motin ICL_WARN("kthread_add(9) failed with error %d", error); 12865b157f21SAlexander Motin ICL_CONN_LOCK(ic); 12875b157f21SAlexander Motin ic->ic_receive_running = false; 12885b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 12895b157f21SAlexander Motin ICL_CONN_UNLOCK(ic); 12905b157f21SAlexander Motin icl_soft_conn_close(ic); 12915b157f21SAlexander Motin return (error); 12925b157f21SAlexander Motin } 12935b157f21SAlexander Motin 1294321b17ecSEdward Tomasz Napierala return (0); 1295321b17ecSEdward Tomasz Napierala } 1296321b17ecSEdward Tomasz Napierala 1297321b17ecSEdward Tomasz Napierala int 1298321b17ecSEdward Tomasz Napierala icl_soft_conn_handoff(struct icl_conn *ic, int fd) 1299321b17ecSEdward Tomasz Napierala { 1300321b17ecSEdward Tomasz Napierala struct file *fp; 1301321b17ecSEdward Tomasz Napierala struct socket *so; 1302321b17ecSEdward Tomasz Napierala cap_rights_t rights; 1303321b17ecSEdward Tomasz Napierala int error; 1304321b17ecSEdward Tomasz Napierala 1305321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 1306321b17ecSEdward Tomasz Napierala 1307906a424bSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 1308906a424bSEdward Tomasz Napierala /* 1309906a424bSEdward Tomasz Napierala * We're transitioning to Full Feature phase, and we don't 1310906a424bSEdward Tomasz Napierala * really care. 1311906a424bSEdward Tomasz Napierala */ 1312906a424bSEdward Tomasz Napierala if (fd == 0) { 1313906a424bSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1314906a424bSEdward Tomasz Napierala if (ic->ic_socket == NULL) { 1315906a424bSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1316906a424bSEdward Tomasz Napierala ICL_WARN("proxy handoff without connect"); 1317906a424bSEdward Tomasz Napierala return (EINVAL); 1318906a424bSEdward Tomasz Napierala } 1319906a424bSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1320906a424bSEdward Tomasz Napierala return (0); 1321906a424bSEdward Tomasz Napierala } 1322906a424bSEdward Tomasz Napierala #endif 1323906a424bSEdward Tomasz Napierala 1324321b17ecSEdward Tomasz Napierala /* 1325321b17ecSEdward Tomasz Napierala * Steal the socket from userland. 1326321b17ecSEdward Tomasz Napierala */ 1327321b17ecSEdward Tomasz Napierala error = fget(curthread, fd, 1328321b17ecSEdward Tomasz Napierala cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp); 1329321b17ecSEdward Tomasz Napierala if (error != 0) 1330321b17ecSEdward Tomasz Napierala return (error); 1331321b17ecSEdward Tomasz Napierala if (fp->f_type != DTYPE_SOCKET) { 1332321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1333321b17ecSEdward Tomasz Napierala return (EINVAL); 1334321b17ecSEdward Tomasz Napierala } 1335321b17ecSEdward Tomasz Napierala so = fp->f_data; 1336321b17ecSEdward Tomasz Napierala if (so->so_type != SOCK_STREAM) { 1337321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1338321b17ecSEdward Tomasz Napierala return (EINVAL); 1339321b17ecSEdward Tomasz Napierala } 1340321b17ecSEdward Tomasz Napierala 1341321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1342321b17ecSEdward Tomasz Napierala 1343321b17ecSEdward Tomasz Napierala if (ic->ic_socket != NULL) { 1344321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1345321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1346321b17ecSEdward Tomasz Napierala return (EBUSY); 1347321b17ecSEdward Tomasz Napierala } 1348321b17ecSEdward Tomasz Napierala 1349321b17ecSEdward Tomasz Napierala ic->ic_socket = fp->f_data; 1350321b17ecSEdward Tomasz Napierala fp->f_ops = &badfileops; 1351321b17ecSEdward Tomasz Napierala fp->f_data = NULL; 1352321b17ecSEdward Tomasz Napierala fdrop(fp, curthread); 1353321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1354321b17ecSEdward Tomasz Napierala 1355321b17ecSEdward Tomasz Napierala error = icl_conn_start(ic); 1356321b17ecSEdward Tomasz Napierala 1357321b17ecSEdward Tomasz Napierala return (error); 1358321b17ecSEdward Tomasz Napierala } 1359321b17ecSEdward Tomasz Napierala 1360321b17ecSEdward Tomasz Napierala void 13615aabcd7cSEdward Tomasz Napierala icl_soft_conn_close(struct icl_conn *ic) 1362321b17ecSEdward Tomasz Napierala { 1363321b17ecSEdward Tomasz Napierala struct icl_pdu *pdu; 13645b157f21SAlexander Motin struct socket *so; 1365321b17ecSEdward Tomasz Napierala 1366321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 13675b157f21SAlexander Motin 13685b157f21SAlexander Motin /* 13695b157f21SAlexander Motin * Wake up the threads, so they can properly terminate. 13705b157f21SAlexander Motin */ 13715b157f21SAlexander Motin ic->ic_disconnecting = true; 13725b157f21SAlexander Motin while (ic->ic_receive_running || ic->ic_send_running) { 13735b157f21SAlexander Motin cv_signal(&ic->ic_receive_cv); 13745b157f21SAlexander Motin cv_signal(&ic->ic_send_cv); 13755b157f21SAlexander Motin cv_wait(&ic->ic_send_cv, ic->ic_lock); 13765b157f21SAlexander Motin } 13775b157f21SAlexander Motin 13785b157f21SAlexander Motin /* Some other thread could close the connection same time. */ 13795b157f21SAlexander Motin so = ic->ic_socket; 13805b157f21SAlexander Motin if (so == NULL) { 1381321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1382321b17ecSEdward Tomasz Napierala return; 1383321b17ecSEdward Tomasz Napierala } 13845b157f21SAlexander Motin ic->ic_socket = NULL; 1385321b17ecSEdward Tomasz Napierala 1386321b17ecSEdward Tomasz Napierala /* 1387321b17ecSEdward Tomasz Napierala * Deregister socket upcalls. 1388321b17ecSEdward Tomasz Napierala */ 1389321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 13905b157f21SAlexander Motin SOCKBUF_LOCK(&so->so_snd); 13915b157f21SAlexander Motin if (so->so_snd.sb_upcall != NULL) 13925b157f21SAlexander Motin soupcall_clear(so, SO_SND); 13935b157f21SAlexander Motin SOCKBUF_UNLOCK(&so->so_snd); 13945b157f21SAlexander Motin SOCKBUF_LOCK(&so->so_rcv); 13955b157f21SAlexander Motin if (so->so_rcv.sb_upcall != NULL) 13965b157f21SAlexander Motin soupcall_clear(so, SO_RCV); 13975b157f21SAlexander Motin SOCKBUF_UNLOCK(&so->so_rcv); 13985b157f21SAlexander Motin soclose(so); 1399321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1400321b17ecSEdward Tomasz Napierala 1401321b17ecSEdward Tomasz Napierala if (ic->ic_receive_pdu != NULL) { 1402321b17ecSEdward Tomasz Napierala //ICL_DEBUG("freeing partially received PDU"); 140382f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, ic->ic_receive_pdu); 1404321b17ecSEdward Tomasz Napierala ic->ic_receive_pdu = NULL; 1405321b17ecSEdward Tomasz Napierala } 1406321b17ecSEdward Tomasz Napierala 1407321b17ecSEdward Tomasz Napierala /* 1408321b17ecSEdward Tomasz Napierala * Remove any outstanding PDUs from the send queue. 1409321b17ecSEdward Tomasz Napierala */ 1410321b17ecSEdward Tomasz Napierala while (!STAILQ_EMPTY(&ic->ic_to_send)) { 1411321b17ecSEdward Tomasz Napierala pdu = STAILQ_FIRST(&ic->ic_to_send); 1412321b17ecSEdward Tomasz Napierala STAILQ_REMOVE_HEAD(&ic->ic_to_send, ip_next); 141382f7fa7aSAlexander Motin icl_soft_conn_pdu_free(ic, pdu); 1414321b17ecSEdward Tomasz Napierala } 1415321b17ecSEdward Tomasz Napierala 1416321b17ecSEdward Tomasz Napierala KASSERT(STAILQ_EMPTY(&ic->ic_to_send), 1417321b17ecSEdward Tomasz Napierala ("destroying session with non-empty send queue")); 1418321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1419321b17ecSEdward Tomasz Napierala } 1420321b17ecSEdward Tomasz Napierala 14217a03d007SEdward Tomasz Napierala int 1422604c023fSEdward Tomasz Napierala icl_soft_conn_task_setup(struct icl_conn *ic, struct icl_pdu *ip, 1423604c023fSEdward Tomasz Napierala struct ccb_scsiio *csio, uint32_t *task_tagp, void **prvp) 14247a03d007SEdward Tomasz Napierala { 14257a03d007SEdward Tomasz Napierala 14267a03d007SEdward Tomasz Napierala return (0); 14277a03d007SEdward Tomasz Napierala } 14287a03d007SEdward Tomasz Napierala 14297a03d007SEdward Tomasz Napierala void 14307a03d007SEdward Tomasz Napierala icl_soft_conn_task_done(struct icl_conn *ic, void *prv) 14317a03d007SEdward Tomasz Napierala { 14327a03d007SEdward Tomasz Napierala } 14337a03d007SEdward Tomasz Napierala 14347a03d007SEdward Tomasz Napierala int 14357a03d007SEdward Tomasz Napierala icl_soft_conn_transfer_setup(struct icl_conn *ic, union ctl_io *io, 14367a03d007SEdward Tomasz Napierala uint32_t *transfer_tag, void **prvp) 14377a03d007SEdward Tomasz Napierala { 14387a03d007SEdward Tomasz Napierala 14397a03d007SEdward Tomasz Napierala return (0); 14407a03d007SEdward Tomasz Napierala } 14417a03d007SEdward Tomasz Napierala 14427a03d007SEdward Tomasz Napierala void 14437a03d007SEdward Tomasz Napierala icl_soft_conn_transfer_done(struct icl_conn *ic, void *prv) 14447a03d007SEdward Tomasz Napierala { 14457a03d007SEdward Tomasz Napierala } 14467a03d007SEdward Tomasz Napierala 1447321b17ecSEdward Tomasz Napierala static int 144897b84d34SNavdeep Parhar icl_soft_limits(struct icl_drv_limits *idl) 1449321b17ecSEdward Tomasz Napierala { 1450321b17ecSEdward Tomasz Napierala 145197b84d34SNavdeep Parhar idl->idl_max_recv_data_segment_length = 128 * 1024; 14529ac7c5a6SHans Petter Selasky idl->idl_max_send_data_segment_length = 128 * 1024; 14539ac7c5a6SHans Petter Selasky idl->idl_max_burst_length = 262144; 14549ac7c5a6SHans Petter Selasky idl->idl_first_burst_length = 65536; 1455321b17ecSEdward Tomasz Napierala 1456321b17ecSEdward Tomasz Napierala return (0); 1457321b17ecSEdward Tomasz Napierala } 1458321b17ecSEdward Tomasz Napierala 1459321b17ecSEdward Tomasz Napierala #ifdef ICL_KERNEL_PROXY 1460321b17ecSEdward Tomasz Napierala int 1461f41492b0SEdward Tomasz Napierala icl_soft_conn_connect(struct icl_conn *ic, int domain, int socktype, 1462f41492b0SEdward Tomasz Napierala int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa) 1463f41492b0SEdward Tomasz Napierala { 1464f41492b0SEdward Tomasz Napierala 1465f41492b0SEdward Tomasz Napierala return (icl_soft_proxy_connect(ic, domain, socktype, protocol, 1466f41492b0SEdward Tomasz Napierala from_sa, to_sa)); 1467f41492b0SEdward Tomasz Napierala } 1468f41492b0SEdward Tomasz Napierala 1469f41492b0SEdward Tomasz Napierala int 1470f41492b0SEdward Tomasz Napierala icl_soft_handoff_sock(struct icl_conn *ic, struct socket *so) 1471321b17ecSEdward Tomasz Napierala { 1472321b17ecSEdward Tomasz Napierala int error; 1473321b17ecSEdward Tomasz Napierala 1474321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK_ASSERT_NOT(ic); 1475321b17ecSEdward Tomasz Napierala 1476321b17ecSEdward Tomasz Napierala if (so->so_type != SOCK_STREAM) 1477321b17ecSEdward Tomasz Napierala return (EINVAL); 1478321b17ecSEdward Tomasz Napierala 1479321b17ecSEdward Tomasz Napierala ICL_CONN_LOCK(ic); 1480321b17ecSEdward Tomasz Napierala if (ic->ic_socket != NULL) { 1481321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1482321b17ecSEdward Tomasz Napierala return (EBUSY); 1483321b17ecSEdward Tomasz Napierala } 1484321b17ecSEdward Tomasz Napierala ic->ic_socket = so; 1485321b17ecSEdward Tomasz Napierala ICL_CONN_UNLOCK(ic); 1486321b17ecSEdward Tomasz Napierala 1487321b17ecSEdward Tomasz Napierala error = icl_conn_start(ic); 1488321b17ecSEdward Tomasz Napierala 1489321b17ecSEdward Tomasz Napierala return (error); 1490321b17ecSEdward Tomasz Napierala } 1491321b17ecSEdward Tomasz Napierala #endif /* ICL_KERNEL_PROXY */ 1492321b17ecSEdward Tomasz Napierala 1493321b17ecSEdward Tomasz Napierala static int 1494321b17ecSEdward Tomasz Napierala icl_soft_load(void) 1495321b17ecSEdward Tomasz Napierala { 1496321b17ecSEdward Tomasz Napierala int error; 1497321b17ecSEdward Tomasz Napierala 1498321b17ecSEdward Tomasz Napierala icl_pdu_zone = uma_zcreate("icl_pdu", 1499321b17ecSEdward Tomasz Napierala sizeof(struct icl_pdu), NULL, NULL, NULL, NULL, 1500321b17ecSEdward Tomasz Napierala UMA_ALIGN_PTR, 0); 1501321b17ecSEdward Tomasz Napierala refcount_init(&icl_ncons, 0); 1502321b17ecSEdward Tomasz Napierala 1503321b17ecSEdward Tomasz Napierala /* 1504321b17ecSEdward Tomasz Napierala * The reason we call this "none" is that to the user, 1505321b17ecSEdward Tomasz Napierala * it's known as "offload driver"; "offload driver: soft" 1506321b17ecSEdward Tomasz Napierala * doesn't make much sense. 1507321b17ecSEdward Tomasz Napierala */ 1508b8911594SEdward Tomasz Napierala error = icl_register("none", false, 0, 1509b8911594SEdward Tomasz Napierala icl_soft_limits, icl_soft_new_conn); 1510321b17ecSEdward Tomasz Napierala KASSERT(error == 0, ("failed to register")); 1511321b17ecSEdward Tomasz Napierala 1512b8911594SEdward Tomasz Napierala #if defined(ICL_KERNEL_PROXY) && 0 1513b8911594SEdward Tomasz Napierala /* 1514b8911594SEdward Tomasz Napierala * Debugging aid for kernel proxy functionality. 1515b8911594SEdward Tomasz Napierala */ 1516b8911594SEdward Tomasz Napierala error = icl_register("proxytest", true, 0, 1517b8911594SEdward Tomasz Napierala icl_soft_limits, icl_soft_new_conn); 1518b8911594SEdward Tomasz Napierala KASSERT(error == 0, ("failed to register")); 1519b8911594SEdward Tomasz Napierala #endif 1520b8911594SEdward Tomasz Napierala 1521321b17ecSEdward Tomasz Napierala return (error); 1522321b17ecSEdward Tomasz Napierala } 1523321b17ecSEdward Tomasz Napierala 1524321b17ecSEdward Tomasz Napierala static int 1525321b17ecSEdward Tomasz Napierala icl_soft_unload(void) 1526321b17ecSEdward Tomasz Napierala { 1527321b17ecSEdward Tomasz Napierala 1528321b17ecSEdward Tomasz Napierala if (icl_ncons != 0) 1529321b17ecSEdward Tomasz Napierala return (EBUSY); 1530321b17ecSEdward Tomasz Napierala 1531b8911594SEdward Tomasz Napierala icl_unregister("none", false); 1532b8911594SEdward Tomasz Napierala #if defined(ICL_KERNEL_PROXY) && 0 1533b8911594SEdward Tomasz Napierala icl_unregister("proxytest", true); 1534b8911594SEdward Tomasz Napierala #endif 1535321b17ecSEdward Tomasz Napierala 1536321b17ecSEdward Tomasz Napierala uma_zdestroy(icl_pdu_zone); 1537321b17ecSEdward Tomasz Napierala 1538321b17ecSEdward Tomasz Napierala return (0); 1539321b17ecSEdward Tomasz Napierala } 1540321b17ecSEdward Tomasz Napierala 1541321b17ecSEdward Tomasz Napierala static int 1542321b17ecSEdward Tomasz Napierala icl_soft_modevent(module_t mod, int what, void *arg) 1543321b17ecSEdward Tomasz Napierala { 1544321b17ecSEdward Tomasz Napierala 1545321b17ecSEdward Tomasz Napierala switch (what) { 1546321b17ecSEdward Tomasz Napierala case MOD_LOAD: 1547321b17ecSEdward Tomasz Napierala return (icl_soft_load()); 1548321b17ecSEdward Tomasz Napierala case MOD_UNLOAD: 1549321b17ecSEdward Tomasz Napierala return (icl_soft_unload()); 1550321b17ecSEdward Tomasz Napierala default: 1551321b17ecSEdward Tomasz Napierala return (EINVAL); 1552321b17ecSEdward Tomasz Napierala } 1553321b17ecSEdward Tomasz Napierala } 1554321b17ecSEdward Tomasz Napierala 1555321b17ecSEdward Tomasz Napierala moduledata_t icl_soft_data = { 1556321b17ecSEdward Tomasz Napierala "icl_soft", 1557321b17ecSEdward Tomasz Napierala icl_soft_modevent, 1558321b17ecSEdward Tomasz Napierala 0 1559321b17ecSEdward Tomasz Napierala }; 1560321b17ecSEdward Tomasz Napierala 1561321b17ecSEdward Tomasz Napierala DECLARE_MODULE(icl_soft, icl_soft_data, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 1562321b17ecSEdward Tomasz Napierala MODULE_DEPEND(icl_soft, icl, 1, 1, 1); 1563872d2d92SEdward Tomasz Napierala MODULE_VERSION(icl_soft, 1); 1564