embedaddon/istgt/src/istgt_iscsi.c - view

File: [ELWIX - Embedded LightWeight unIX -] / embedaddon / istgt / src / istgt_iscsi.c
Revision 1.1.1.3 (vendor branch): download - view: text, annotated - select for diffs - revision graph
Sun Jul 21 23:49:22 2013 UTC (11 years, 5 months ago) by misho
Branches: istgt, MAIN
CVS tags: v20121028, HEAD

20121028

/* * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <stdint.h> #include <inttypes.h> #include <errno.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <poll.h> #include <pthread.h> #ifdef HAVE_PTHREAD_NP_H #include <pthread_np.h> #endif #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> #include <time.h> #include "istgt.h" #include "istgt_ver.h" #include "istgt_log.h" #include "istgt_conf.h" #include "istgt_sock.h" #include "istgt_misc.h" #include "istgt_crc32c.h" #include "istgt_md5.h" #include "istgt_iscsi.h" #include "istgt_iscsi_param.h" #include "istgt_lu.h" #include "istgt_proto.h" #include "istgt_scsi.h" #include "istgt_queue.h" #ifdef ISTGT_USE_KQUEUE #include <sys/types.h> #include <sys/event.h> #include <sys/time.h> #endif #if !defined(__GNUC__) #undef __attribute__ #define __attribute__(x) #endif /* according to RFC1982 */ #define SN32_CMPMAX (((uint32_t)1U) << (32 - 1)) #define SN32_LT(S1,S2) \ (((uint32_t)(S1) != (uint32_t)(S2)) \ && (((uint32_t)(S1) < (uint32_t)(S2) \ && ((uint32_t)(S2) - (uint32_t)(S1) < SN32_CMPMAX)) \ || ((uint32_t)(S1) > (uint32_t)(S2) \ && ((uint32_t)(S1) - (uint32_t)(S2) > SN32_CMPMAX)))) #define SN32_GT(S1,S2) \ (((uint32_t)(S1) != (uint32_t)(S2)) \ && (((uint32_t)(S1) < (uint32_t)(S2) \ && ((uint32_t)(S2) - (uint32_t)(S1) > SN32_CMPMAX)) \ || ((uint32_t)(S1) > (uint32_t)(S2) \ && ((uint32_t)(S1) - (uint32_t)(S2) < SN32_CMPMAX)))) #define POLLWAIT 5000 #define MAX_MCSREVWAIT (10 * 1000) #define ISCMDQ 8 #define ISCSI_GETVAL(PARAMS,KEY) \ istgt_iscsi_param_get_val((PARAMS),(KEY)) #define ISCSI_EQVAL(PARAMS,KEY,VAL) \ istgt_iscsi_param_eq_val((PARAMS),(KEY),(VAL)) #define ISCSI_DELVAL(PARAMS,KEY) \ istgt_iscsi_param_del((PARAMS),(KEY)) #define ISCSI_ADDVAL(PARAMS,KEY,VAL,LIST,TYPE) \ istgt_iscsi_param_add((PARAMS),(KEY),(VAL), (LIST), (TYPE)) static int g_nconns; static CONN_Ptr *g_conns; static pthread_mutex_t g_conns_mutex; static uint16_t g_last_tsih; static pthread_mutex_t g_last_tsih_mutex; static int istgt_add_transfer_task(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd); static void istgt_clear_transfer_task(CONN_Ptr conn, uint32_t CmdSN); static void istgt_clear_all_transfer_task(CONN_Ptr conn); static int istgt_iscsi_send_r2t(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd, int offset, int len, uint32_t transfer_tag, uint32_t *R2TSN); static int istgt_append_sess(CONN_Ptr conn, uint64_t isid, uint16_t tsih, uint16_t cid); static void istgt_remove_conn(CONN_Ptr conn); static int istgt_iscsi_drop_all_conns(CONN_Ptr conn); static int istgt_iscsi_drop_old_conns(CONN_Ptr conn); /* Switch to use readv/writev (assume blocking) */ #define ISTGT_USE_IOVEC #if defined (ISTGT_USE_IOVEC) #include <sys/uio.h> #endif #if !defined (ISTGT_USE_IOVEC) #if 0 #define ISTGT_USE_RECVBLOCK #define ISTGT_USE_SENDBLOCK #endif #if 0 #define ISTGT_USE_RECVWAIT #endif static ssize_t istgt_iscsi_read(CONN_Ptr conn, void *buf, size_t nbytes) { #ifndef ISTGT_USE_RECVBLOCK uint8_t padding[ISCSI_ALIGNMENT]; #endif uint8_t *cp; size_t pad_bytes; size_t total; ssize_t r; total = 0; cp = (uint8_t *) buf; #ifdef ISTGT_USE_RECVBLOCK pad_bytes = ISCSI_ALIGN(nbytes) - nbytes; do { #ifdef ISTGT_USE_RECVWAIT r = recv(conn->sock, cp + total, (nbytes + pad_bytes - total), MSG_WAITALL); #else r = recv(conn->sock, cp + total, (nbytes + pad_bytes - total), 0); #endif if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read error (errno=%d)\n", errno); return r; } if (r == 0) { /* EOF */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read EOF\n"); return r; } total += r; } while (total < nbytes); if (total != (nbytes + pad_bytes)) { /* incomplete bytes */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd/%zd+%zd bytes\n", total, nbytes, pad_bytes); if (total > nbytes) { total = nbytes; } return total; } if (pad_bytes != 0) { /* complete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (padding %zd)\n", nbytes, pad_bytes); } else { /* just aligned */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (no padding)\n", nbytes); } #else /* !ISTGT_USE_RECVBLOCK */ do { r = istgt_read_socket(conn->sock, cp + total, (nbytes - total), conn->timeout); if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read error (errno=%d)\n", errno); return r; } if (r == 0) { /* EOF */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read EOF\n"); return r; } total += r; } while (total < nbytes); #if 0 ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "RAW DATA", cp, total); #endif if (total != nbytes) { /* incomplete bytes */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd/%zd bytes\n", total, nbytes); return total; } /* need padding? */ pad_bytes = ISCSI_ALIGN(nbytes) - nbytes; if (pad_bytes != 0) { total = 0; cp = (uint8_t *) &padding[0]; do { r = istgt_read_socket(conn->sock, cp + total, (pad_bytes - total), conn->timeout); if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (padding error) (errno=%d)\n", nbytes, errno); return nbytes; } if (r == 0) { /* EOF */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (padding EOF)\n", nbytes); return nbytes; } total += r; } while (total < pad_bytes); if (total != pad_bytes) { /* incomplete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (padding %zd)\n", nbytes, total); return nbytes; } /* complete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (padding %zd)\n", nbytes, pad_bytes); return nbytes; } /* just aligned */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Read %zd bytes (no padding)\n", nbytes); #endif /* ISTGT_USE_RECVBLOCK */ return nbytes; } static ssize_t istgt_iscsi_write(CONN_Ptr conn, const void *buf, size_t nbytes) { uint8_t padding[ISCSI_ALIGNMENT]; const uint8_t *cp; size_t pad_bytes; size_t total; ssize_t r; total = 0; cp = (const uint8_t *) buf; #ifdef ISTGT_USE_SENDBLOCK pad_bytes = ISCSI_ALIGN(nbytes) - nbytes; do { r = send(conn->wsock, cp, nbytes, 0); if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write error (errno=%d)\n", errno); return r; } total += r; } while (total < nbytes); if (total != nbytes) { /* incomplete bytes */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd/%zd bytes\n", total, nbytes); return total; } if (pad_bytes != 0) { memset(padding, 0, sizeof padding); total = 0; cp = (const uint8_t *) &padding[0]; do { r = send(conn->wsock, cp, pad_bytes, 0); if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (padding error) (errno=%d)\n", nbytes, errno); return nbytes; } total += r; } while (total < pad_bytes); if (total != pad_bytes) { /* incomplete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (padding %zd)\n", nbytes, total); return nbytes; } /* complete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (padding %zd)\n", nbytes, pad_bytes); } else { /* just aligned */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (no padding)\n", nbytes); } #else /* !ISTGT_USE_SENDBLOCK */ do { r = istgt_write_socket(conn->wsock, cp + total, (nbytes - total), conn->timeout); if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write error (errno=%d)\n", errno); return r; } total += r; } while (total < nbytes); if (total != nbytes) { /* incomplete bytes */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd/%zd bytes\n", total, nbytes); return r; } /* need padding? */ pad_bytes = ISCSI_ALIGN(nbytes) - nbytes; if (pad_bytes != 0) { memset(padding, 0, sizeof padding); total = 0; cp = (const uint8_t *) &padding[0]; do { r = istgt_write_socket(conn->wsock, cp + total, (pad_bytes - total), conn->timeout); if (r < 0) { /* error */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (padding error) (errno=%d)\n", nbytes, errno); return nbytes; } total += r; } while (total < pad_bytes); if (total != pad_bytes) { /* incomplete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (padding %zd)\n", nbytes, total); return nbytes; } /* complete padding */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (padding %zd)\n", nbytes, pad_bytes); return nbytes; } /* just aligned */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "Write %zd bytes (no padding)\n", nbytes); #endif /* ISTGT_USE_SENDBLOCK */ return nbytes; } #endif /* !defined (ISTGT_USE_IOVEC) */ #define MATCH_DIGEST_WORD(BUF, CRC32C) \ ( ((((uint32_t) *((uint8_t *)(BUF)+0)) << 0) \ | (((uint32_t) *((uint8_t *)(BUF)+1)) << 8) \ | (((uint32_t) *((uint8_t *)(BUF)+2)) << 16) \ | (((uint32_t) *((uint8_t *)(BUF)+3)) << 24)) \ == (CRC32C)) #define MAKE_DIGEST_WORD(BUF, CRC32C) \ ( ((*((uint8_t *)(BUF)+0)) = (uint8_t)((uint32_t)(CRC32C) >> 0)), \ ((*((uint8_t *)(BUF)+1)) = (uint8_t)((uint32_t)(CRC32C) >> 8)), \ ((*((uint8_t *)(BUF)+2)) = (uint8_t)((uint32_t)(CRC32C) >> 16)), \ ((*((uint8_t *)(BUF)+3)) = (uint8_t)((uint32_t)(CRC32C) >> 24))) #if 0 static int istgt_match_digest_word(const uint8_t *buf, uint32_t crc32c) { uint32_t l; l = (buf[0] & 0xffU) << 0; l |= (buf[1] & 0xffU) << 8; l |= (buf[2] & 0xffU) << 16; l |= (buf[3] & 0xffU) << 24; return (l == crc32c); } static uint8_t * istgt_make_digest_word(uint8_t *buf, size_t len, uint32_t crc32c) { if (len < ISCSI_DIGEST_LEN) return NULL; buf[0] = (crc32c >> 0) & 0xffU; buf[1] = (crc32c >> 8) & 0xffU; buf[2] = (crc32c >> 16) & 0xffU; buf[3] = (crc32c >> 24) & 0xffU; return buf; } #endif #if !defined (ISTGT_USE_IOVEC) static int istgt_iscsi_read_pdu(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { uint32_t crc32c; int total_ahs_len; int data_len; int segment_len; int total; int rc; pdu->ahs = NULL; pdu->total_ahs_len = 0; pdu->data = NULL; pdu->data_segment_len = 0; total = 0; /* BHS */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "BHS read %d\n", ISCSI_BHS_LEN); rc = istgt_iscsi_read(conn, &pdu->bhs, ISCSI_BHS_LEN); if (rc < 0) { if (errno == ECONNRESET) { ISTGT_WARNLOG("Connection reset by peer (%s)\n", conn->initiator_name); conn->state = CONN_STATE_EXITING; } else if (errno == ETIMEDOUT) { ISTGT_WARNLOG("Operation timed out (%s)\n", conn->initiator_name); conn->state = CONN_STATE_EXITING; } else { ISTGT_ERRLOG("iscsi_read() failed (errno=%d,%s)\n", errno, conn->initiator_name); } return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "iscsi_read() EOF (%s)\n", conn->initiator_name); conn->state = CONN_STATE_EXITING; return -1; } if (rc != ISCSI_BHS_LEN) { ISTGT_ERRLOG("invalid BHS length (%d)\n", rc); return -1; } total += ISCSI_BHS_LEN; /* AHS */ total_ahs_len = DGET8(&pdu->bhs.total_ahs_len); if (total_ahs_len != 0) { pdu->ahs = xmalloc(ISCSI_ALIGN((4 * total_ahs_len))); ISTGT_TRACELOG(ISTGT_TRACE_NET, "AHS read %d\n", (4 * total_ahs_len)); rc = istgt_iscsi_read(conn, pdu->ahs, (4 * total_ahs_len)); if (rc < 0) { ISTGT_ERRLOG("iscsi_read() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "iscsi_read() EOF\n"); conn->state = CONN_STATE_EXITING; return -1; } if (rc != (4 * total_ahs_len)) { ISTGT_ERRLOG("invalid AHS length (%d)\n", rc); return -1; } pdu->total_ahs_len = total_ahs_len; total += (4 * total_ahs_len); } else { pdu->ahs = NULL; pdu->total_ahs_len = 0; } /* Header Digest */ if (conn->header_digest) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "HeaderDigest read %d\n", ISCSI_DIGEST_LEN); rc = istgt_iscsi_read(conn, pdu->header_digest, ISCSI_DIGEST_LEN); if (rc < 0) { ISTGT_ERRLOG("iscsi_read() failed (errno=%d,%s)\n", errno, conn->initiator_name); { int opcode = BGET8W(&pdu->bhs.opcode, 5, 6); ISTGT_ERRLOG("Header Digest read error (opcode = 0x%x)\n", opcode); } return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "iscsi_read() EOF\n"); conn->state = CONN_STATE_EXITING; return -1; } if (rc != ISCSI_DIGEST_LEN) { ISTGT_ERRLOG("invalid Header Digest length (%d)\n", rc); return -1; } total += ISCSI_DIGEST_LEN; } /* Data Segment */ data_len = DGET24(&pdu->bhs.data_segment_len[0]); if (data_len != 0) { if (conn->sess == NULL) { segment_len = DEFAULT_FIRSTBURSTLENGTH; } else { segment_len = conn->MaxRecvDataSegmentLength; } if (data_len > segment_len) { ISTGT_ERRLOG("Data(%d) > Segment(%d)\n", data_len, segment_len); return -1; } if (ISCSI_ALIGN(data_len) <= ISTGT_SHORTDATASIZE) { pdu->data = pdu->shortdata; } else { pdu->data = xmalloc(ISCSI_ALIGN(segment_len)); } ISTGT_TRACELOG(ISTGT_TRACE_NET, "Data read %d\n", data_len); rc = istgt_iscsi_read(conn, pdu->data, data_len); if (rc < 0) { ISTGT_ERRLOG("iscsi_read() failed (%d,errno=%d,%s)\n", rc, errno, conn->initiator_name); return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "iscsi_read() EOF\n"); conn->state = CONN_STATE_EXITING; return -1; } if (rc != data_len) { ISTGT_ERRLOG("invalid Data Segment length (%d)\n", rc); return -1; } pdu->data_segment_len = data_len; total += data_len; #if 0 if (data_len > 512) { ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "DataSegment", pdu->data, 512); } else { ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "DataSegment", pdu->data, data_len); } #endif } else { pdu->data = NULL; pdu->data_segment_len = 0; } /* Data Digest */ if (conn->data_digest && data_len != 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "DataDigest read %d\n", ISCSI_DIGEST_LEN); rc = istgt_iscsi_read(conn, pdu->data_digest, ISCSI_DIGEST_LEN); if (rc < 0) { ISTGT_ERRLOG("iscsi_read() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "iscsi_read() EOF\n"); conn->state = CONN_STATE_EXITING; return -1; } if (rc != ISCSI_DIGEST_LEN) { ISTGT_ERRLOG("invalid Data Digest length (%d)\n", rc); return -1; } total += ISCSI_DIGEST_LEN; } /* check digest */ if (conn->header_digest) { if (total_ahs_len == 0) { crc32c = istgt_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN); } else { int upd_total = 0; crc32c = ISTGT_CRC32C_INITIAL; crc32c = istgt_update_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN, crc32c); upd_total += ISCSI_BHS_LEN; crc32c = istgt_update_crc32c((uint8_t *) pdu->ahs, (4 * total_ahs_len), crc32c); upd_total += (4 * total_ahs_len); crc32c = istgt_fixup_crc32c(upd_total, crc32c); crc32c = crc32c ^ ISTGT_CRC32C_XOR; } rc = MATCH_DIGEST_WORD(pdu->header_digest, crc32c); if (rc == 0) { ISTGT_ERRLOG("header digest error (%s)\n", conn->initiator_name); return -1; } } if (conn->data_digest && data_len != 0) { crc32c = istgt_crc32c(pdu->data, data_len); rc = MATCH_DIGEST_WORD(pdu->data_digest, crc32c); if (rc == 0) { ISTGT_ERRLOG("data digest error (%s)\n", conn->initiator_name); return -1; } } return total; } #else /* defined (ISTGT_USE_IOVEC) */ static int istgt_iscsi_read_pdu(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { struct iovec iovec[4]; /* AHS+HD+DATA+DD */ uint32_t crc32c; time_t start, now; int nbytes; int total_ahs_len; int data_len; int segment_len; int total; int rc; int i; pdu->ahs = NULL; pdu->total_ahs_len = 0; pdu->data = NULL; pdu->data_segment_len = 0; total = 0; /* BHS (require for all PDU) */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "BHS read %d\n", ISCSI_BHS_LEN); errno = 0; start = time(NULL); rc = recv(conn->sock, &pdu->bhs, ISCSI_BHS_LEN, MSG_WAITALL); if (rc < 0) { now = time(NULL); if (errno == ECONNRESET) { ISTGT_WARNLOG("Connection reset by peer (%s,time=%d)\n", conn->initiator_name, (int)difftime(now, start)); conn->state = CONN_STATE_EXITING; } else if (errno == ETIMEDOUT) { ISTGT_WARNLOG("Operation timed out (%s,time=%d)\n", conn->initiator_name, (int)difftime(now, start)); conn->state = CONN_STATE_EXITING; } else { ISTGT_ERRLOG("iscsi_read() failed (errno=%d,%s,time=%d)\n", errno, conn->initiator_name, (int)difftime(now, start)); } return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "recv() EOF (%s)\n", conn->initiator_name); conn->state = CONN_STATE_EXITING; return -1; } if (rc != ISCSI_BHS_LEN) { ISTGT_ERRLOG("invalid BHS length (%d,%s)\n", rc, conn->initiator_name); return -1; } total += ISCSI_BHS_LEN; /* AHS */ total_ahs_len = DGET8(&pdu->bhs.total_ahs_len); if (total_ahs_len != 0) { pdu->ahs = xmalloc(ISCSI_ALIGN((4 * total_ahs_len))); pdu->total_ahs_len = total_ahs_len; total += (4 * total_ahs_len); } else { pdu->ahs = NULL; pdu->total_ahs_len = 0; } iovec[0].iov_base = pdu->ahs; iovec[0].iov_len = 4 * pdu->total_ahs_len; /* Header Digest */ iovec[1].iov_base = pdu->header_digest; if (conn->header_digest) { iovec[1].iov_len = ISCSI_DIGEST_LEN; total += ISCSI_DIGEST_LEN; } else { iovec[1].iov_len = 0; } /* Data Segment */ data_len = DGET24(&pdu->bhs.data_segment_len[0]); if (data_len != 0) { if (conn->sess == NULL) { segment_len = DEFAULT_FIRSTBURSTLENGTH; } else { segment_len = conn->MaxRecvDataSegmentLength; } if (data_len > segment_len) { ISTGT_ERRLOG("Data(%d) > Segment(%d)\n", data_len, segment_len); return -1; } if (ISCSI_ALIGN(data_len) <= ISTGT_SHORTDATASIZE) { pdu->data = pdu->shortdata; } else { pdu->data = xmalloc(ISCSI_ALIGN(segment_len)); } pdu->data_segment_len = data_len; total += ISCSI_ALIGN(data_len); } else { pdu->data = NULL; pdu->data_segment_len = 0; } iovec[2].iov_base = pdu->data; iovec[2].iov_len = ISCSI_ALIGN(pdu->data_segment_len); /* Data Digest */ iovec[3].iov_base = pdu->data_digest; if (conn->data_digest && data_len != 0) { iovec[3].iov_len = ISCSI_DIGEST_LEN; total += ISCSI_DIGEST_LEN; } else { iovec[3].iov_len = 0; } /* read all bytes to iovec */ nbytes = total - ISCSI_BHS_LEN; ISTGT_TRACELOG(ISTGT_TRACE_NET, "PDU read %d\n", nbytes); errno = 0; start = time(NULL); while (nbytes > 0) { rc = readv(conn->sock, &iovec[0], 4); if (rc < 0) { now = time(NULL); ISTGT_ERRLOG("readv() failed (%d,errno=%d,%s,time=%d)\n", rc, errno, conn->initiator_name, (int)difftime(now, start)); return -1; } if (rc == 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "readv() EOF (%s)\n", conn->initiator_name); conn->state = CONN_STATE_EXITING; return -1; } nbytes -= rc; if (nbytes == 0) break; /* adjust iovec length */ for (i = 0; i < 4; i++) { if (iovec[i].iov_len != 0 && iovec[i].iov_len > (size_t)rc) { iovec[i].iov_base = (void *) (((uintptr_t)iovec[i].iov_base) + rc); iovec[i].iov_len -= rc; break; } else { rc -= iovec[i].iov_len; iovec[i].iov_len = 0; } } } /* check digest */ if (conn->header_digest) { if (total_ahs_len == 0) { crc32c = istgt_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN); } else { int upd_total = 0; crc32c = ISTGT_CRC32C_INITIAL; crc32c = istgt_update_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN, crc32c); upd_total += ISCSI_BHS_LEN; crc32c = istgt_update_crc32c((uint8_t *) pdu->ahs, (4 * total_ahs_len), crc32c); upd_total += (4 * total_ahs_len); crc32c = istgt_fixup_crc32c(upd_total, crc32c); crc32c = crc32c ^ ISTGT_CRC32C_XOR; } rc = MATCH_DIGEST_WORD(pdu->header_digest, crc32c); if (rc == 0) { ISTGT_ERRLOG("header digest error (%s)\n", conn->initiator_name); return -1; } } if (conn->data_digest && data_len != 0) { crc32c = istgt_crc32c(pdu->data, ISCSI_ALIGN(data_len)); rc = MATCH_DIGEST_WORD(pdu->data_digest, crc32c); if (rc == 0) { ISTGT_ERRLOG("data digest error (%s)\n", conn->initiator_name); return -1; } } return total; } #endif /* defined (ISTGT_USE_IOVEC) */ static int istgt_iscsi_write_pdu_internal(CONN_Ptr conn, ISCSI_PDU_Ptr pdu); static int istgt_iscsi_write_pdu_queue(CONN_Ptr conn, ISCSI_PDU_Ptr pdu, int req_type, int I_bit); static int istgt_update_pdu(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd) { uint8_t *rsp; uint32_t task_tag; int opcode; int I_bit; I_bit = lu_cmd->I_bit; rsp = (uint8_t *) &lu_cmd->pdu->bhs; opcode = BGET8W(&rsp[0], 5, 6); task_tag = DGET32(&rsp[16]); if ((opcode == ISCSI_OP_R2T) || (opcode == ISCSI_OP_NOPIN && task_tag == 0xffffffffU)) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else if ((opcode == ISCSI_OP_TASK_RSP) || (opcode == ISCSI_OP_NOPIN && task_tag != 0xffffffffU)) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (I_bit == 0) { conn->sess->ExpCmdSN++; conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } return 0; } static int istgt_iscsi_write_pdu(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { int rc; if (conn->use_sender == 0) { rc = istgt_iscsi_write_pdu_internal(conn, pdu); } else { rc = istgt_iscsi_write_pdu_queue(conn, pdu, ISTGT_LU_TASK_REQPDU, 0); } return rc; } static int istgt_iscsi_write_pdu_upd(CONN_Ptr conn, ISCSI_PDU_Ptr pdu, int I_bit) { int rc; if (conn->use_sender == 0) { rc = istgt_iscsi_write_pdu_internal(conn, pdu); } else { rc = istgt_iscsi_write_pdu_queue(conn, pdu, ISTGT_LU_TASK_REQUPDPDU, I_bit); } return rc; } static int istgt_iscsi_write_pdu_queue(CONN_Ptr conn, ISCSI_PDU_Ptr pdu, int req_type, int I_bit) { int rc; if (conn->use_sender == 0) { rc = istgt_iscsi_write_pdu_internal(conn, pdu); } else { ISTGT_LU_TASK_Ptr lu_task; ISCSI_PDU_Ptr src_pdu, dst_pdu; uint8_t *cp; int total_ahs_len; int data_len; int alloc_len; int total; cp = (uint8_t *) &pdu->bhs; total_ahs_len = DGET8(&cp[4]); data_len = DGET24(&cp[5]); total = 0; #if 0 ISTGT_LOG("W:PDU OP=%x, tag=%x, ExpCmdSN=%u, MaxCmdSN=%u\n", DGET8(&cp[0]), DGET32(&cp[32]), DGET32(&cp[28]), DGET32(&cp[32])); #endif /* allocate for queued PDU */ alloc_len = ISCSI_ALIGN(sizeof *lu_task); alloc_len += ISCSI_ALIGN(sizeof *lu_task->lu_cmd.pdu); alloc_len += ISCSI_ALIGN(4 * total_ahs_len); alloc_len += ISCSI_ALIGN(data_len); lu_task = xmalloc(alloc_len); memset(lu_task, 0, alloc_len); lu_task->lu_cmd.pdu = (ISCSI_PDU_Ptr) ((uintptr_t)lu_task + ISCSI_ALIGN(sizeof *lu_task)); lu_task->lu_cmd.pdu->ahs = (ISCSI_AHS *) ((uintptr_t)lu_task->lu_cmd.pdu + ISCSI_ALIGN(sizeof *lu_task->lu_cmd.pdu)); lu_task->lu_cmd.pdu->data = (uint8_t *) ((uintptr_t)lu_task->lu_cmd.pdu->ahs + ISCSI_ALIGN(4 * total_ahs_len)); /* specify type and self conn */ //lu_task->type = ISTGT_LU_TASK_REQPDU; lu_task->type = req_type; lu_task->conn = conn; /* extra flags */ lu_task->lu_cmd.I_bit = I_bit; /* copy PDU structure */ src_pdu = pdu; dst_pdu = lu_task->lu_cmd.pdu; memcpy(&dst_pdu->bhs, &src_pdu->bhs, ISCSI_BHS_LEN); total += ISCSI_BHS_LEN; if (total_ahs_len != 0) { memcpy(dst_pdu->ahs, src_pdu->ahs, 4 * total_ahs_len); total += (4 * total_ahs_len); } else { dst_pdu->ahs = NULL; } if (conn->header_digest) { memcpy(dst_pdu->header_digest, src_pdu->header_digest, ISCSI_DIGEST_LEN); total += ISCSI_DIGEST_LEN; } if (data_len != 0) { memcpy(dst_pdu->data, src_pdu->data, data_len); total += data_len; } else { dst_pdu->data = NULL; } if (conn->data_digest && data_len != 0) { memcpy(dst_pdu->data_digest, src_pdu->data_digest, ISCSI_DIGEST_LEN); total += ISCSI_DIGEST_LEN; } /* insert to queue */ MTX_LOCK(&conn->result_queue_mutex); rc = istgt_queue_enqueue(&conn->result_queue, lu_task); if (rc != 0) { MTX_UNLOCK(&conn->result_queue_mutex); ISTGT_ERRLOG("queue_enqueue() failed\n"); return -1; } /* notify to thread */ rc = pthread_cond_broadcast(&conn->result_queue_cond); MTX_UNLOCK(&conn->result_queue_mutex); if (rc != 0) { ISTGT_ERRLOG("cond_broadcast() failed\n"); return -1; } /* total bytes should be sent in queue */ rc = total; } return rc; } #if !defined (ISTGT_USE_IOVEC) static int istgt_iscsi_write_pdu_internal(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { uint8_t *cp; uint32_t crc32c; int enable_digest; int opcode; int total_ahs_len; int data_len; int total; int rc; cp = (uint8_t *) &pdu->bhs; total_ahs_len = DGET8(&cp[4]); data_len = DGET24(&cp[5]); total = 0; enable_digest = 1; opcode = BGET8W(&cp[0], 5, 6); if (opcode == ISCSI_OP_LOGIN_RSP) { /* this PDU should be sent without digest */ enable_digest = 0; } #define ISTGT_USE_SHORTPDU_WRITE #ifdef ISTGT_USE_SHORTPDU_WRITE /* if short size, BHS + AHS + HD + DATA + DD */ if (total_ahs_len == 0 && data_len <= ISTGT_SHORTDATASIZE) { uint8_t *spp = conn->shortpdu; int pad_len = 0; memcpy(spp, (uint8_t *) &pdu->bhs, ISCSI_BHS_LEN); total = ISCSI_BHS_LEN; if (enable_digest && conn->header_digest) { crc32c = istgt_crc32c(spp, total); MAKE_DIGEST_WORD(spp + total, crc32c); total += ISCSI_DIGEST_LEN; } memcpy(spp + total, pdu->data, data_len); total += data_len; if ((data_len % ISCSI_ALIGNMENT) != 0) { memset(spp + total, 0, ISCSI_ALIGN(data_len) - data_len); total += ISCSI_ALIGN(data_len) - data_len; pad_len += ISCSI_ALIGN(data_len) - data_len; } if (enable_digest && conn->data_digest && data_len != 0) { crc32c = istgt_crc32c(pdu->data, data_len); MAKE_DIGEST_WORD(spp + total, crc32c); total += ISCSI_DIGEST_LEN; } ISTGT_TRACELOG(ISTGT_TRACE_NET, "PDU write %d\n", total); rc = istgt_iscsi_write(conn, spp, total); if (rc < 0) { ISTGT_ERRLOG("iscsi_write() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc != total) { ISTGT_ERRLOG("incomplete PDU length (%d)\n", rc); return -1; } return total - pad_len; } #endif /* ISTGT_USE_SHORTPDU_WRITE */ /* BHS */ ISTGT_TRACELOG(ISTGT_TRACE_NET, "BHS write %d\n", ISCSI_BHS_LEN); rc = istgt_iscsi_write(conn, &pdu->bhs, ISCSI_BHS_LEN); if (rc < 0) { ISTGT_ERRLOG("iscsi_write() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc != ISCSI_BHS_LEN) { ISTGT_ERRLOG("incomplete BHS length (%d)\n", rc); return -1; } total += ISCSI_BHS_LEN; /* AHS */ if (total_ahs_len != 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "AHS write %d\n", (4 * total_ahs_len)); rc = istgt_iscsi_write(conn, pdu->ahs, (4 * total_ahs_len)); if (rc < 0) { ISTGT_ERRLOG("iscsi_write() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc != (4 * total_ahs_len)) { ISTGT_ERRLOG("incomplete AHS length (%d)\n", rc); return -1; } total += (4 * total_ahs_len); } /* Header Digest */ if (enable_digest && conn->header_digest) { if (total_ahs_len == 0) { crc32c = istgt_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN); } else { int upd_total = 0; crc32c = ISTGT_CRC32C_INITIAL; crc32c = istgt_update_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN, crc32c); upd_total += ISCSI_BHS_LEN; crc32c = istgt_update_crc32c((uint8_t *) pdu->ahs, (4 * total_ahs_len), crc32c); upd_total += (4 * total_ahs_len); crc32c = istgt_fixup_crc32c(upd_total, crc32c); crc32c = crc32c ^ ISTGT_CRC32C_XOR; } MAKE_DIGEST_WORD(pdu->header_digest, crc32c); ISTGT_TRACELOG(ISTGT_TRACE_NET, "HeaderDigest write %d\n", ISCSI_DIGEST_LEN); rc = istgt_iscsi_write(conn, pdu->header_digest, ISCSI_DIGEST_LEN); if (rc < 0) { ISTGT_ERRLOG("iscsi_write() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc != ISCSI_DIGEST_LEN) { ISTGT_ERRLOG("incomplete Header Digest length (%d)\n", rc); return -1; } total += ISCSI_DIGEST_LEN; } /* Data Segment */ if (data_len != 0) { ISTGT_TRACELOG(ISTGT_TRACE_NET, "Data write %d\n", data_len); rc = istgt_iscsi_write(conn, pdu->data, data_len); if (rc < 0) { ISTGT_ERRLOG("iscsi_write() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc != data_len) { ISTGT_ERRLOG("incomplete Data Segment length (%d)\n", rc); return -1; } total += data_len; } /* Data Digest */ if (enable_digest && conn->data_digest && data_len != 0) { crc32c = istgt_crc32c(pdu->data, data_len); MAKE_DIGEST_WORD(pdu->data_digest, crc32c); ISTGT_TRACELOG(ISTGT_TRACE_NET, "DataDigest write %d\n", ISCSI_DIGEST_LEN); ISTGT_TRACELOG(ISTGT_TRACE_NET, "DataDigest %x\n", crc32c); rc = istgt_iscsi_write(conn, pdu->data_digest, ISCSI_DIGEST_LEN); if (rc < 0) { ISTGT_ERRLOG("iscsi_write() failed (errno=%d,%s)\n", errno, conn->initiator_name); return -1; } if (rc != ISCSI_DIGEST_LEN) { ISTGT_ERRLOG("incomplete Data Digest length (%d)\n", rc); return -1; } total += ISCSI_DIGEST_LEN; } return total; } #else /* defined (ISTGT_USE_IOVEC) */ static int istgt_iscsi_write_pdu_internal(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { struct iovec iovec[5]; /* BHS+AHS+HD+DATA+DD */ uint8_t *cp; uint32_t crc32c; time_t start, now; int nbytes; int enable_digest; int opcode; int total_ahs_len; int data_len; int total; int rc; int i; cp = (uint8_t *) &pdu->bhs; total_ahs_len = DGET8(&cp[4]); data_len = DGET24(&cp[5]); total = 0; enable_digest = 1; opcode = BGET8W(&cp[0], 5, 6); if (opcode == ISCSI_OP_LOGIN_RSP) { /* this PDU should be sent without digest */ enable_digest = 0; } /* BHS */ iovec[0].iov_base = &pdu->bhs; iovec[0].iov_len = ISCSI_BHS_LEN; total += ISCSI_BHS_LEN; /* AHS */ iovec[1].iov_base = pdu->ahs; iovec[1].iov_len = 4 * total_ahs_len; total += (4 * total_ahs_len); /* Header Digest */ iovec[2].iov_base = pdu->header_digest; if (enable_digest && conn->header_digest) { if (total_ahs_len == 0) { crc32c = istgt_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN); } else { int upd_total = 0; crc32c = ISTGT_CRC32C_INITIAL; crc32c = istgt_update_crc32c((uint8_t *) &pdu->bhs, ISCSI_BHS_LEN, crc32c); upd_total += ISCSI_BHS_LEN; crc32c = istgt_update_crc32c((uint8_t *) pdu->ahs, (4 * total_ahs_len), crc32c); upd_total += (4 * total_ahs_len); crc32c = istgt_fixup_crc32c(upd_total, crc32c); crc32c = crc32c ^ ISTGT_CRC32C_XOR; } MAKE_DIGEST_WORD(pdu->header_digest, crc32c); iovec[2].iov_len = ISCSI_DIGEST_LEN; total += ISCSI_DIGEST_LEN; } else { iovec[2].iov_len = 0; } /* Data Segment */ iovec[3].iov_base = pdu->data; iovec[3].iov_len = ISCSI_ALIGN(data_len); total += ISCSI_ALIGN(data_len); /* Data Digest */ iovec[4].iov_base = pdu->data_digest; if (enable_digest && conn->data_digest && data_len != 0) { crc32c = istgt_crc32c(pdu->data, ISCSI_ALIGN(data_len)); MAKE_DIGEST_WORD(pdu->data_digest, crc32c); iovec[4].iov_len = ISCSI_DIGEST_LEN; total += ISCSI_DIGEST_LEN; } else { iovec[4].iov_len = 0; } /* write all bytes from iovec */ nbytes = total; ISTGT_TRACELOG(ISTGT_TRACE_NET, "PDU write %d\n", nbytes); errno = 0; start = time(NULL); while (nbytes > 0) { rc = writev(conn->sock, &iovec[0], 5); if (rc < 0) { now = time(NULL); ISTGT_ERRLOG("writev() failed (errno=%d,%s,time=%d)\n", errno, conn->initiator_name, (int)difftime(now, start)); return -1; } nbytes -= rc; if (nbytes == 0) break; /* adjust iovec length */ for (i = 0; i < 5; i++) { if (iovec[i].iov_len != 0 && iovec[i].iov_len > (size_t)rc) { iovec[i].iov_base = (void *) (((uintptr_t)iovec[i].iov_base) + rc); iovec[i].iov_len -= rc; break; } else { rc -= iovec[i].iov_len; iovec[i].iov_len = 0; } } } return total; } #endif /* defined (ISTGT_USE_IOVEC) */ int istgt_iscsi_copy_pdu(ISCSI_PDU_Ptr dst_pdu, ISCSI_PDU_Ptr src_pdu) { memcpy(&dst_pdu->bhs, &src_pdu->bhs, ISCSI_BHS_LEN); dst_pdu->ahs = src_pdu->ahs; memcpy(dst_pdu->header_digest, src_pdu->header_digest, ISCSI_DIGEST_LEN); if (src_pdu->data == src_pdu->shortdata) { memcpy(dst_pdu->shortdata, src_pdu->shortdata, sizeof src_pdu->shortdata); dst_pdu->data = dst_pdu->shortdata; } else { dst_pdu->data = src_pdu->data; } memcpy(dst_pdu->data_digest, src_pdu->data_digest, ISCSI_DIGEST_LEN); dst_pdu->total_ahs_len = src_pdu->total_ahs_len; dst_pdu->data_segment_len = src_pdu->data_segment_len; dst_pdu->copy_pdu = 0; src_pdu->copy_pdu = 1; return 0; } typedef struct iscsi_param_table_t { const char *key; const char *val; const char *list; int type; } ISCSI_PARAM_TABLE; static ISCSI_PARAM_TABLE conn_param_table[] = { { "HeaderDigest", "None", "CRC32C,None", ISPT_LIST }, { "DataDigest", "None", "CRC32C,None", ISPT_LIST }, { "MaxRecvDataSegmentLength", "8192", "512,16777215", ISPT_NUMERICAL }, { "OFMarker", "No", "Yes,No", ISPT_BOOLEAN_AND }, { "IFMarker", "No", "Yes,No", ISPT_BOOLEAN_AND }, { "OFMarkInt", "1", "1,65535", ISPT_NUMERICAL }, { "IFMarkInt", "1", "1,65535", ISPT_NUMERICAL }, { "AuthMethod", "None", "CHAP,None", ISPT_LIST }, { "CHAP_A", "5", "5", ISPT_LIST }, { "CHAP_N", "", "", ISPT_DECLARATIVE }, { "CHAP_R", "", "", ISPT_DECLARATIVE }, { "CHAP_I", "", "", ISPT_DECLARATIVE }, { "CHAP_C", "", "", ISPT_DECLARATIVE }, { NULL, NULL, NULL, ISPT_INVALID }, }; static ISCSI_PARAM_TABLE sess_param_table[] = { { "MaxConnections", "1", "1,65535", ISPT_NUMERICAL }, #if 0 /* need special handling */ { "SendTargets", "", "", ISPT_DECLARATIVE }, #endif { "TargetName", "", "", ISPT_DECLARATIVE }, { "InitiatorName", "", "", ISPT_DECLARATIVE }, { "TargetAlias", "", "", ISPT_DECLARATIVE }, { "InitiatorAlias", "", "", ISPT_DECLARATIVE }, { "TargetAddress", "", "", ISPT_DECLARATIVE }, { "TargetPortalGroupTag", "1", "1,65535", ISPT_NUMERICAL }, { "InitialR2T", "Yes", "Yes,No", ISPT_BOOLEAN_OR }, { "ImmediateData", "Yes", "Yes,No", ISPT_BOOLEAN_AND }, { "MaxBurstLength", "262144", "512,16777215", ISPT_NUMERICAL }, { "FirstBurstLength", "65536", "512,16777215", ISPT_NUMERICAL }, { "DefaultTime2Wait", "2", "0,3600", ISPT_NUMERICAL_MAX }, { "DefaultTime2Retain", "20", "0,3600", ISPT_NUMERICAL }, { "MaxOutstandingR2T", "1", "1,65536", ISPT_NUMERICAL }, { "DataPDUInOrder", "Yes", "Yes,No", ISPT_BOOLEAN_OR }, { "DataSequenceInOrder", "Yes", "Yes,No", ISPT_BOOLEAN_OR }, { "ErrorRecoveryLevel", "0", "0,2", ISPT_NUMERICAL }, { "SessionType", "Normal", "Normal,Discovery", ISPT_DECLARATIVE }, { NULL, NULL, NULL, ISPT_INVALID }, }; static int istgt_iscsi_params_init_internal(ISCSI_PARAM **params, ISCSI_PARAM_TABLE *table) { int rc; int i; for (i = 0; table[i].key != NULL; i++) { rc = istgt_iscsi_param_add(params, table[i].key, table[i].val, table[i].list, table[i].type); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_add() failed\n"); return -1; } } return 0; } static int istgt_iscsi_conn_params_init(ISCSI_PARAM **params) { return istgt_iscsi_params_init_internal(params, &conn_param_table[0]); } static int istgt_iscsi_sess_params_init(ISCSI_PARAM **params) { return istgt_iscsi_params_init_internal(params, &sess_param_table[0]); } static char * istgt_iscsi_param_get_val(ISCSI_PARAM *params, const char *key) { ISCSI_PARAM *param; param = istgt_iscsi_param_find(params, key); if (param == NULL) return NULL; return param->val; } static int istgt_iscsi_param_eq_val(ISCSI_PARAM *params, const char *key, const char *val) { ISCSI_PARAM *param; param = istgt_iscsi_param_find(params, key); if (param == NULL) return 0; if (strcasecmp(param->val, val) == 0) return 1; return 0; } #if 0 static int istgt_iscsi_print_params(ISCSI_PARAM *params) { ISCSI_PARAM *param; for (param = params; param != NULL; param = param->next) { printf("key=[%s] val=[%s] list=[%s] type=%d\n", param->key, param->val, param->list, param->type); } return 0; } #endif static int istgt_iscsi_negotiate_params(CONN_Ptr conn, ISCSI_PARAM *params, uint8_t *data, int alloc_len, int data_len) { ISCSI_PARAM *param; ISCSI_PARAM *cur_param; char *valid_list, *in_val; char *valid_next, *in_next; char *cur_val; char *new_val; char *valid_val; char *min_val, *max_val; int discovery; int cur_type; int val_i, cur_val_i; int min_i, max_i; int total; int len; int sw; total = data_len; if (alloc_len < 1) { return 0; } if (total > alloc_len) { total = alloc_len; data[total - 1] = '\0'; return total; } if (params == NULL) { /* no input */ return total; } /* discovery? */ discovery = 0; cur_param = istgt_iscsi_param_find(params, "SessionType"); if (cur_param == NULL) { SESS_MTX_LOCK(conn); cur_param = istgt_iscsi_param_find(conn->sess->params, "SessionType"); if (cur_param == NULL) { /* no session type */ } else { if (strcasecmp(cur_param->val, "Discovery") == 0) { discovery = 1; } } SESS_MTX_UNLOCK(conn); } else { if (strcasecmp(cur_param->val, "Discovery") == 0) { discovery = 1; } } /* for temporary store */ valid_list = xmalloc(ISCSI_TEXT_MAX_VAL_LEN + 1); in_val = xmalloc(ISCSI_TEXT_MAX_VAL_LEN + 1); cur_val = xmalloc(ISCSI_TEXT_MAX_VAL_LEN + 1); for (param = params; param != NULL; param = param->next) { /* sendtargets is special */ if (strcasecmp(param->key, "SendTargets") == 0) { continue; } /* CHAP keys */ if (strcasecmp(param->key, "CHAP_A") == 0 || strcasecmp(param->key, "CHAP_N") == 0 || strcasecmp(param->key, "CHAP_R") == 0 || strcasecmp(param->key, "CHAP_I") == 0 || strcasecmp(param->key, "CHAP_C") == 0) { continue; } if (discovery) { /* 12.2, 12.10, 12.11, 12.13, 12.14, 12.17, 12.18, 12.19 */ if (strcasecmp(param->key, "MaxConnections") == 0 || strcasecmp(param->key, "InitialR2T") == 0 || strcasecmp(param->key, "ImmediateData") == 0 || strcasecmp(param->key, "MaxBurstLength") == 0 || strcasecmp(param->key, "FirstBurstLength") == 0 || strcasecmp(param->key, "MaxOutstandingR2T") == 0 || strcasecmp(param->key, "DataPDUInOrder") == 0 || strcasecmp(param->key, "DataSequenceInOrder") == 0) { strlcpy(in_val, "Irrelevant", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; cur_type = -1; goto add_val; } } /* get current param */ sw = 0; cur_param = istgt_iscsi_param_find(conn->params, param->key); if (cur_param == NULL) { sw = 1; SESS_MTX_LOCK(conn); cur_param = istgt_iscsi_param_find(conn->sess->params, param->key); if (cur_param == NULL) { SESS_MTX_UNLOCK(conn); if (strncasecmp(param->key, "X-", 2) == 0 || strncasecmp(param->key, "X#", 2) == 0) { /* Extension Key */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "extension key %.64s\n", param->key); } else { ISTGT_ERRLOG("unknown key %.64s\n", param->key); } strlcpy(in_val, "NotUnderstood", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; cur_type = -1; goto add_val; } strlcpy(valid_list, cur_param->list, ISCSI_TEXT_MAX_VAL_LEN); strlcpy(cur_val, cur_param->val, ISCSI_TEXT_MAX_VAL_LEN); cur_type = cur_param->type; SESS_MTX_UNLOCK(conn); } else { strlcpy(valid_list, cur_param->list, ISCSI_TEXT_MAX_VAL_LEN); strlcpy(cur_val, cur_param->val, ISCSI_TEXT_MAX_VAL_LEN); cur_type = cur_param->type; } /* negotiate value */ switch (cur_type) { case ISPT_LIST: strlcpy(in_val, param->val, ISCSI_TEXT_MAX_VAL_LEN); in_next = in_val; while ((new_val = strsepq(&in_next, ",")) != NULL) { valid_next = valid_list; while ((valid_val = strsepq(&valid_next, ",")) != NULL) { if (strcasecmp(new_val, valid_val) == 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "match %s\n", new_val); goto update_val; } } } if (new_val == NULL) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "key %.64s reject\n", param->key); strlcpy(in_val, "Reject", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; goto add_val; } break; case ISPT_NUMERICAL: val_i = (int) strtol(param->val, NULL, 10); cur_val_i = (int) strtol(cur_val, NULL, 10); valid_next = valid_list; min_val = strsepq(&valid_next, ","); max_val = strsepq(&valid_next, ","); if (min_val != NULL) { min_i = (int) strtol(min_val, NULL, 10); } else { min_i = 0; } if (max_val != NULL) { max_i = (int) strtol(max_val, NULL, 10); } else { max_i = 0; } if (val_i < min_i || val_i > max_i) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "key %.64s reject\n", param->key); strlcpy(in_val, "Reject", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; goto add_val; } if (strcasecmp(param->key, "MaxRecvDataSegmentLength") == 0) { /* Declarative, but set as same value */ cur_val_i = conn->TargetMaxRecvDataSegmentLength; } if (val_i > cur_val_i) { val_i = cur_val_i; } snprintf(in_val, ISCSI_TEXT_MAX_VAL_LEN, "%d", val_i); new_val = in_val; break; case ISPT_NUMERICAL_MAX: val_i = (int) strtol(param->val, NULL, 10); cur_val_i = (int) strtol(cur_val, NULL, 10); valid_next = valid_list; min_val = strsepq(&valid_next, ","); max_val = strsepq(&valid_next, ","); if (min_val != NULL) { min_i = (int) strtol(min_val, NULL, 10); } else { min_i = 0; } if (max_val != NULL) { max_i = (int) strtol(max_val, NULL, 10); } else { max_i = 0; } if (val_i < min_i || val_i > max_i) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "key %.64s reject\n", param->key); strlcpy(in_val, "Reject", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; goto add_val; } if (val_i < cur_val_i) { val_i = cur_val_i; } snprintf(in_val, ISCSI_TEXT_MAX_VAL_LEN, "%d", val_i); new_val = in_val; break; case ISPT_BOOLEAN_OR: if (strcasecmp(cur_val, "Yes") == 0) { /* YES || XXX */ strlcpy(in_val, "Yes", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; } else { if (strcasecmp(param->val, "Yes") == 0 || strcasecmp(param->val, "No") == 0) { new_val = param->val; } else { /* unknown value */ strlcpy(in_val, "Reject", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; goto add_val; } } break; case ISPT_BOOLEAN_AND: if (strcasecmp(cur_val, "No") == 0) { /* No && XXX */ strlcpy(in_val, "No", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; } else { if (strcasecmp(param->val, "Yes") == 0 || strcasecmp(param->val, "No") == 0) { new_val = param->val; } else { /* unknown value */ strlcpy(in_val, "Reject", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; goto add_val; } } break; case ISPT_DECLARATIVE: strlcpy(in_val, param->val, ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; break; default: strlcpy(in_val, param->val, ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; break; } update_val: if (sw) { /* update session wide */ SESS_MTX_LOCK(conn); istgt_iscsi_param_set(conn->sess->params, param->key, new_val); SESS_MTX_UNLOCK(conn); } else { /* update connection only */ istgt_iscsi_param_set(conn->params, param->key, new_val); } add_val: if (cur_type != ISPT_DECLARATIVE) { if (alloc_len - total < 1) { ISTGT_ERRLOG("data space small %d\n", alloc_len); return total; } ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "negotiated %s=%s\n", param->key, new_val); len = snprintf((char *) data + total, alloc_len - total, "%s=%s", param->key, new_val); total += len + 1; } } xfree(valid_list); xfree(in_val); xfree(cur_val); return total; } static int istgt_iscsi_append_text(CONN_Ptr conn __attribute__((__unused__)), const char *key, const char *val, uint8_t *data, int alloc_len, int data_len) { int total; int len; total = data_len; if (alloc_len < 1) { return 0; } if (total > alloc_len) { total = alloc_len; data[total - 1] = '\0'; return total; } if (alloc_len - total < 1) { ISTGT_ERRLOG("data space small %d\n", alloc_len); return total; } len = snprintf((char *) data + total, alloc_len - total, "%s=%s", key, val); total += len + 1; return total; } static int istgt_iscsi_append_param(CONN_Ptr conn, const char *key, uint8_t *data, int alloc_len, int data_len) { ISCSI_PARAM *param; int rc; param = istgt_iscsi_param_find(conn->params, key); if (param == NULL) { param = istgt_iscsi_param_find(conn->sess->params, key); if (param == NULL) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "no key %.64s\n", key); return data_len; } } rc = istgt_iscsi_append_text(conn, param->key, param->val, data, alloc_len, data_len); return rc; } int istgt_chap_get_authinfo(ISTGT_CHAP_AUTH *auth, const char *authfile, const char *authuser, int ag_tag) { CONFIG *config = NULL; CF_SECTION *sp; const char *val; const char *user, *muser; const char *secret, *msecret; int rc; int i; if (auth->user != NULL) { xfree(auth->user); xfree(auth->secret); xfree(auth->muser); xfree(auth->msecret); auth->user = auth->secret = NULL; auth->muser = auth->msecret = NULL; } /* read config files */ config = istgt_allocate_config(); rc = istgt_read_config(config, authfile); if (rc < 0) { ISTGT_ERRLOG("auth conf error\n"); istgt_free_config(config); return -1; } //istgt_print_config(config); sp = config->section; while (sp != NULL) { if (sp->type == ST_AUTHGROUP) { if (sp->num == 0) { ISTGT_ERRLOG("Group 0 is invalid\n"); istgt_free_config(config); return -1; } if (ag_tag != sp->num) { goto skip_ag_tag; } val = istgt_get_val(sp, "Comment"); if (val != NULL) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Comment %s\n", val); } for (i = 0; ; i++) { val = istgt_get_nval(sp, "Auth", i); if (val == NULL) break; user = istgt_get_nmval(sp, "Auth", i, 0); secret = istgt_get_nmval(sp, "Auth", i, 1); muser = istgt_get_nmval(sp, "Auth", i, 2); msecret = istgt_get_nmval(sp, "Auth", i, 3); if (strcasecmp(authuser, user) == 0) { /* match user */ auth->user = xstrdup(user); auth->secret = xstrdup(secret); auth->muser = xstrdup(muser); auth->msecret = xstrdup(msecret); istgt_free_config(config); return 0; } } } skip_ag_tag: sp = sp->next; } istgt_free_config(config); return 0; } static int istgt_iscsi_get_authinfo(CONN_Ptr conn, const char *authuser) { char *authfile = NULL; int ag_tag; int rc; SESS_MTX_LOCK(conn); if (conn->sess->lu != NULL) { ag_tag = conn->sess->lu->auth_group; } else { ag_tag = -1; } SESS_MTX_UNLOCK(conn); if (ag_tag < 0) { MTX_LOCK(&conn->istgt->mutex); ag_tag = conn->istgt->discovery_auth_group; MTX_UNLOCK(&conn->istgt->mutex); } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "ag_tag=%d\n", ag_tag); MTX_LOCK(&conn->istgt->mutex); authfile = xstrdup(conn->istgt->authfile); MTX_UNLOCK(&conn->istgt->mutex); rc = istgt_chap_get_authinfo(&conn->auth, authfile, authuser, ag_tag); if (rc < 0) { ISTGT_ERRLOG("chap_get_authinfo() failed\n"); xfree(authfile); return -1; } xfree(authfile); return 0; } static int istgt_iscsi_auth_params(CONN_Ptr conn, ISCSI_PARAM *params, const char *method, uint8_t *data, int alloc_len, int data_len) { char *in_val; char *in_next; char *new_val; const char *val; const char *user; const char *response; const char *challenge; int total; int rc; if (conn == NULL || params == NULL || method == NULL) { return -1; } if (strcasecmp(method, "CHAP") == 0) { /* method OK */ } else { ISTGT_ERRLOG("unsupported AuthMethod %.64s\n", method); return -1; } total = data_len; if (alloc_len < 1) { return 0; } if (total > alloc_len) { total = alloc_len; data[total - 1] = '\0'; return total; } /* for temporary store */ in_val = xmalloc(ISCSI_TEXT_MAX_VAL_LEN + 1); /* CHAP method (RFC1994) */ if ((val = ISCSI_GETVAL(params, "CHAP_A")) != NULL) { if (conn->auth.chap_phase != ISTGT_CHAP_PHASE_WAIT_A) { ISTGT_ERRLOG("CHAP sequence error\n"); goto error_return; } /* CHAP_A is LIST type */ strlcpy(in_val, val, ISCSI_TEXT_MAX_VAL_LEN); in_next = in_val; while ((new_val = strsepq(&in_next, ",")) != NULL) { if (strcasecmp(new_val, "5") == 0) { /* CHAP with MD5 */ break; } } if (new_val == NULL) { strlcpy(in_val, "Reject", ISCSI_TEXT_MAX_VAL_LEN); new_val = in_val; total = istgt_iscsi_append_text(conn, "CHAP_A", new_val, data, alloc_len, total); goto error_return; } /* selected algorithm is 5 (MD5) */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "got CHAP_A=%s\n", new_val); total = istgt_iscsi_append_text(conn, "CHAP_A", new_val, data, alloc_len, total); /* Identifier is one octet */ istgt_gen_random(conn->auth.chap_id, 1); snprintf(in_val, ISCSI_TEXT_MAX_VAL_LEN, "%d", (int) conn->auth.chap_id[0]); total = istgt_iscsi_append_text(conn, "CHAP_I", in_val, data, alloc_len, total); /* Challenge Value is a variable stream of octets */ /* (binary length MUST not exceed 1024 bytes) */ conn->auth.chap_challenge_len = ISTGT_CHAP_CHALLENGE_LEN; istgt_gen_random(conn->auth.chap_challenge, conn->auth.chap_challenge_len); istgt_bin2hex(in_val, ISCSI_TEXT_MAX_VAL_LEN, conn->auth.chap_challenge, conn->auth.chap_challenge_len); total = istgt_iscsi_append_text(conn, "CHAP_C", in_val, data, alloc_len, total); conn->auth.chap_phase = ISTGT_CHAP_PHASE_WAIT_NR; } else if ((val = ISCSI_GETVAL(params, "CHAP_N")) != NULL) { uint8_t resmd5[ISTGT_MD5DIGEST_LEN]; uint8_t tgtmd5[ISTGT_MD5DIGEST_LEN]; ISTGT_MD5CTX md5ctx; user = val; if (conn->auth.chap_phase != ISTGT_CHAP_PHASE_WAIT_NR) { ISTGT_ERRLOG("CHAP sequence error\n"); goto error_return; } response = ISCSI_GETVAL(params, "CHAP_R"); if (response == NULL) { ISTGT_ERRLOG("no response\n"); goto error_return; } rc = istgt_hex2bin(resmd5, ISTGT_MD5DIGEST_LEN, response); if (rc < 0 || rc != ISTGT_MD5DIGEST_LEN) { ISTGT_ERRLOG("response format error\n"); goto error_return; } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "got CHAP_N/CHAP_R\n"); rc = istgt_iscsi_get_authinfo(conn, val); if (rc < 0) { //ISTGT_ERRLOG("auth user or secret is missing\n"); ISTGT_ERRLOG("iscsi_get_authinfo() failed\n"); goto error_return; } if (conn->auth.user == NULL || conn->auth.secret == NULL) { //ISTGT_ERRLOG("auth user or secret is missing\n"); ISTGT_ERRLOG("auth failed (user %.64s)\n", user); goto error_return; } istgt_md5init(&md5ctx); /* Identifier */ istgt_md5update(&md5ctx, conn->auth.chap_id, 1); /* followed by secret */ istgt_md5update(&md5ctx, conn->auth.secret, strlen(conn->auth.secret)); /* followed by Challenge Value */ istgt_md5update(&md5ctx, conn->auth.chap_challenge, conn->auth.chap_challenge_len); /* tgtmd5 is expecting Response Value */ istgt_md5final(tgtmd5, &md5ctx); istgt_bin2hex(in_val, ISCSI_TEXT_MAX_VAL_LEN, tgtmd5, ISTGT_MD5DIGEST_LEN); #if 0 printf("tgtmd5=%s, resmd5=%s\n", in_val, response); istgt_dump("tgtmd5", tgtmd5, ISTGT_MD5DIGEST_LEN); istgt_dump("resmd5", resmd5, ISTGT_MD5DIGEST_LEN); #endif /* compare MD5 digest */ if (memcmp(tgtmd5, resmd5, ISTGT_MD5DIGEST_LEN) != 0) { /* not match */ //ISTGT_ERRLOG("auth user or secret is missing\n"); ISTGT_ERRLOG("auth failed (user %.64s)\n", user); goto error_return; } /* OK initiator's secret */ conn->authenticated = 1; /* mutual CHAP? */ val = ISCSI_GETVAL(params, "CHAP_I"); if (val != NULL) { conn->auth.chap_mid[0] = (uint8_t) strtol(val, NULL, 10); challenge = ISCSI_GETVAL(params, "CHAP_C"); if (challenge == NULL) { ISTGT_ERRLOG("CHAP sequence error\n"); goto error_return; } rc = istgt_hex2bin(conn->auth.chap_mchallenge, ISTGT_CHAP_CHALLENGE_LEN, challenge); if (rc < 0) { ISTGT_ERRLOG("challenge format error\n"); goto error_return; } conn->auth.chap_mchallenge_len = rc; #if 0 istgt_dump("MChallenge", conn->auth.chap_mchallenge, conn->auth.chap_mchallenge_len); #endif ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "got CHAP_I/CHAP_C\n"); if (conn->auth.muser == NULL || conn->auth.msecret == NULL) { //ISTGT_ERRLOG("mutual auth user or secret is missing\n"); ISTGT_ERRLOG("auth failed (user %.64s)\n", user); goto error_return; } istgt_md5init(&md5ctx); /* Identifier */ istgt_md5update(&md5ctx, conn->auth.chap_mid, 1); /* followed by secret */ istgt_md5update(&md5ctx, conn->auth.msecret, strlen(conn->auth.msecret)); /* followed by Challenge Value */ istgt_md5update(&md5ctx, conn->auth.chap_mchallenge, conn->auth.chap_mchallenge_len); /* tgtmd5 is Response Value */ istgt_md5final(tgtmd5, &md5ctx); istgt_bin2hex(in_val, ISCSI_TEXT_MAX_VAL_LEN, tgtmd5, ISTGT_MD5DIGEST_LEN); total = istgt_iscsi_append_text(conn, "CHAP_N", conn->auth.muser, data, alloc_len, total); total = istgt_iscsi_append_text(conn, "CHAP_R", in_val, data, alloc_len, total); } else { /* not mutual */ if (conn->req_mutual) { ISTGT_ERRLOG("required mutual CHAP\n"); goto error_return; } } conn->auth.chap_phase = ISTGT_CHAP_PHASE_END; } else { /* not found CHAP keys */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "start CHAP\n"); conn->auth.chap_phase = ISTGT_CHAP_PHASE_WAIT_A; } xfree(in_val); return total; error_return: conn->auth.chap_phase = ISTGT_CHAP_PHASE_WAIT_A; xfree(in_val); return -1; } static int istgt_iscsi_reject(CONN_Ptr conn, ISCSI_PDU_Ptr pdu, int reason) { ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *data; int total_ahs_len; int data_len; int alloc_len; int rc; total_ahs_len = DGET8(&pdu->bhs.total_ahs_len); data_len = 0; alloc_len = ISCSI_BHS_LEN + (4 * total_ahs_len); if (conn->header_digest) { alloc_len += ISCSI_DIGEST_LEN; } data = xmalloc(alloc_len); memset(data, 0, alloc_len); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Reject PDU reason=%d\n", reason); if (conn->sess != NULL) { SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "StatSN=%u\n", conn->StatSN); } memcpy(data, &pdu->bhs, ISCSI_BHS_LEN); data_len += ISCSI_BHS_LEN; if (total_ahs_len != 0) { memcpy(data + data_len, pdu->ahs, (4 * total_ahs_len)); data_len += (4 * total_ahs_len); } if (conn->header_digest) { memcpy(data + data_len, pdu->header_digest, ISCSI_DIGEST_LEN); data_len += ISCSI_DIGEST_LEN; } rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_REJECT; BDADD8W(&rsp[1], 1, 7, 1); rsp[2] = reason; rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], data_len); // DataSegmentLength DSET32(&rsp[16], 0xffffffffU); if (conn->sess != NULL) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { DSET32(&rsp[24], conn->StatSN); conn->StatSN++; DSET32(&rsp[28], 1); DSET32(&rsp[32], 1); } DSET32(&rsp[36], 0); // DataSN/R2TSN ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "PDU", rsp, ISCSI_BHS_LEN); rc = istgt_iscsi_write_pdu(conn, &rsp_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); xfree(data); return -1; } xfree(data); return 0; } static void istgt_iscsi_copy_param2var(CONN_Ptr conn) { const char *val; val = ISCSI_GETVAL(conn->params, "MaxRecvDataSegmentLength"); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "copy MaxRecvDataSegmentLength=%s\n", val); conn->MaxRecvDataSegmentLength = (int) strtol(val, NULL, 10); if (conn->sendbufsize != conn->MaxRecvDataSegmentLength) { xfree(conn->recvbuf); xfree(conn->sendbuf); if (conn->MaxRecvDataSegmentLength < 8192) { conn->recvbufsize = 8192; conn->sendbufsize = 8192; } else { conn->recvbufsize = conn->MaxRecvDataSegmentLength; conn->sendbufsize = conn->MaxRecvDataSegmentLength; } conn->recvbuf = xmalloc(conn->recvbufsize); conn->sendbuf = xmalloc(conn->sendbufsize); } val = ISCSI_GETVAL(conn->params, "HeaderDigest"); if (strcasecmp(val, "CRC32C") == 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set HeaderDigest=1\n"); conn->header_digest = 1; } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set HeaderDigest=0\n"); conn->header_digest = 0; } val = ISCSI_GETVAL(conn->params, "DataDigest"); if (strcasecmp(val, "CRC32C") == 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set DataDigest=1\n"); conn->data_digest = 1; } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set DataDigest=0\n"); conn->data_digest = 0; } SESS_MTX_LOCK(conn); val = ISCSI_GETVAL(conn->sess->params, "MaxConnections"); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "copy MaxConnections=%s\n", val); conn->sess->MaxConnections = (int) strtol(val, NULL, 10); val = ISCSI_GETVAL(conn->sess->params, "MaxOutstandingR2T"); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "copy MaxOutstandingR2T=%s\n", val); conn->sess->MaxOutstandingR2T = (int) strtol(val, NULL, 10); conn->MaxOutstandingR2T = conn->sess->MaxOutstandingR2T; val = ISCSI_GETVAL(conn->sess->params, "FirstBurstLength"); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "copy FirstBurstLength=%s\n", val); conn->sess->FirstBurstLength = (int) strtol(val, NULL, 10); conn->FirstBurstLength = conn->sess->FirstBurstLength; val = ISCSI_GETVAL(conn->sess->params, "MaxBurstLength"); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "copy MaxBurstLength=%s\n", val); conn->sess->MaxBurstLength = (int) strtol(val, NULL, 10); conn->MaxBurstLength = conn->sess->MaxBurstLength; val = ISCSI_GETVAL(conn->sess->params, "InitialR2T"); if (strcasecmp(val, "Yes") == 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set InitialR2T=1\n"); conn->sess->initial_r2t = 1; } else{ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set InitialR2T=0\n"); conn->sess->initial_r2t = 0; } val = ISCSI_GETVAL(conn->sess->params, "ImmediateData"); if (strcasecmp(val, "Yes") == 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set ImmediateData=1\n"); conn->sess->immediate_data = 1; } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "set ImmediateData=0\n"); conn->sess->immediate_data = 0; } SESS_MTX_UNLOCK(conn); } static int istgt_iscsi_check_values(CONN_Ptr conn) { SESS_MTX_LOCK(conn); if (conn->sess->FirstBurstLength > conn->sess->MaxBurstLength) { ISTGT_ERRLOG("FirstBurstLength(%d) > MaxBurstLength(%d)\n", conn->sess->FirstBurstLength, conn->sess->MaxBurstLength); SESS_MTX_UNLOCK(conn); return -1; } if (conn->sess->MaxBurstLength > 0x00ffffff) { ISTGT_ERRLOG("MaxBurstLength(%d) > 0x00ffffff\n", conn->sess->MaxBurstLength); SESS_MTX_UNLOCK(conn); return -1; } if (conn->TargetMaxRecvDataSegmentLength < 512) { ISTGT_ERRLOG("MaxRecvDataSegmentLength(%d) < 512\n", conn->TargetMaxRecvDataSegmentLength); return -1; } if (conn->TargetMaxRecvDataSegmentLength > 0x00ffffff) { ISTGT_ERRLOG("MaxRecvDataSegmentLength(%d) > 0x00ffffff\n", conn->TargetMaxRecvDataSegmentLength); SESS_MTX_UNLOCK(conn); return -1; } if (conn->MaxRecvDataSegmentLength < 512) { ISTGT_ERRLOG("MaxRecvDataSegmentLength(%d) < 512\n", conn->MaxRecvDataSegmentLength); return -1; } if (conn->MaxRecvDataSegmentLength > 0x00ffffff) { ISTGT_ERRLOG("MaxRecvDataSegmentLength(%d) > 0x00ffffff\n", conn->MaxRecvDataSegmentLength); SESS_MTX_UNLOCK(conn); return -1; } SESS_MTX_UNLOCK(conn); return 0; } static int istgt_iscsi_op_login(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { char buf[MAX_TMPBUF]; ISTGT_LU_Ptr lu = NULL; ISCSI_PARAM *params = NULL; ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *cp; uint8_t *data; const char *session_type; const char *auth_method; const char *val; uint64_t isid; uint16_t tsih; uint16_t cid; uint32_t task_tag; uint32_t CmdSN; uint32_t ExpStatSN; int T_bit, C_bit; int CSG, NSG; int VersionMin, VersionMax; int StatusClass, StatusDetail; int data_len; int alloc_len; int rc; /* Login is proceeding OK */ StatusClass = 0x00; StatusDetail = 0x00; data_len = 0; if (conn->MaxRecvDataSegmentLength < 8192) { // Default MaxRecvDataSegmentLength - RFC3720(12.12) alloc_len = 8192; } else { alloc_len = conn->MaxRecvDataSegmentLength; } data = xmalloc(alloc_len); memset(data, 0, alloc_len); cp = (uint8_t *) &pdu->bhs; T_bit = BGET8(&cp[1], 7); C_bit = BGET8(&cp[1], 6); CSG = BGET8W(&cp[1], 3, 2); NSG = BGET8W(&cp[1], 1, 2); VersionMin = cp[2]; VersionMax = cp[3]; isid = DGET48(&cp[8]); tsih = DGET16(&cp[14]); cid = DGET16(&cp[20]); task_tag = DGET32(&cp[16]); CmdSN = DGET32(&cp[24]); ExpStatSN = DGET32(&cp[28]); #if 1 ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "PDU", cp, ISCSI_BHS_LEN); #endif ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "T=%d, C=%d, CSG=%d, NSG=%d, Min=%d, Max=%d, ITT=%x\n", T_bit, C_bit, CSG, NSG, VersionMin, VersionMax, task_tag); if (conn->sess != NULL) { SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", CmdSN, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u\n", CmdSN, ExpStatSN, conn->StatSN); } if (T_bit && C_bit) { ISTGT_ERRLOG("transit error\n"); xfree(data); return -1; } if (VersionMin > ISCSI_VERSION || VersionMax < ISCSI_VERSION) { ISTGT_ERRLOG("unsupported version %d/%d\n", VersionMin, VersionMax); /* Unsupported version */ StatusClass = 0x02; StatusDetail = 0x05; goto response; } /* store incoming parameters */ rc = istgt_iscsi_parse_params(&params, pdu->data, pdu->data_segment_len); if (rc < 0) { ISTGT_ERRLOG("iscsi_parse_params() failed\n"); error_return: istgt_iscsi_param_free(params); xfree(data); return -1; } /* set port identifiers and parameters */ if (conn->login_phase == ISCSI_LOGIN_PHASE_NONE) { /* Initiator Name and Port */ val = ISCSI_GETVAL(params, "InitiatorName"); if (val == NULL) { ISTGT_ERRLOG("InitiatorName is empty\n"); /* Missing parameter */ StatusClass = 0x02; StatusDetail = 0x07; goto response; } snprintf(conn->initiator_name, sizeof conn->initiator_name, "%s", val); snprintf(conn->initiator_port, sizeof conn->initiator_port, "%s" ",i,0x" "%12.12" PRIx64, val, isid); strlwr(conn->initiator_name); strlwr(conn->initiator_port); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Initiator name: %s\n", conn->initiator_name); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Initiator port: %s\n", conn->initiator_port); /* Session Type */ session_type = ISCSI_GETVAL(params, "SessionType"); if (session_type == NULL) { if (tsih != 0) { session_type = "Normal"; } else { ISTGT_ERRLOG("SessionType is empty\n"); /* Missing parameter */ StatusClass = 0x02; StatusDetail = 0x07; goto response; } } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Session Type: %s\n", session_type); /* Target Name and Port */ if (strcasecmp(session_type, "Normal") == 0) { val = ISCSI_GETVAL(params, "TargetName"); if (val == NULL) { ISTGT_ERRLOG("TargetName is empty\n"); /* Missing parameter */ StatusClass = 0x02; StatusDetail = 0x07; goto response; } snprintf(conn->target_name, sizeof conn->target_name, "%s", val); snprintf(conn->target_port, sizeof conn->target_port, "%s" ",t,0x" "%4.4x", val, conn->portal.tag); strlwr(conn->target_name); strlwr(conn->target_port); MTX_LOCK(&conn->istgt->mutex); lu = istgt_lu_find_target(conn->istgt, conn->target_name); if (lu == NULL) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("lu_find_target() failed\n"); /* Not found */ StatusClass = 0x02; StatusDetail = 0x03; goto response; } rc = istgt_lu_access(conn, lu, conn->initiator_name, conn->initiator_addr); if (rc < 0) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("lu_access() failed\n"); /* Not found */ StatusClass = 0x02; StatusDetail = 0x03; goto response; } if (rc == 0) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("access denied\n"); /* Not found */ StatusClass = 0x02; StatusDetail = 0x03; goto response; } MTX_UNLOCK(&conn->istgt->mutex); /* check existing session */ ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "isid=%"PRIx64", tsih=%u, cid=%u\n", isid, tsih, cid); if (tsih != 0) { /* multiple connections */ rc = istgt_append_sess(conn, isid, tsih, cid); if (rc < 0) { ISTGT_ERRLOG("isid=%"PRIx64", tsih=%u, cid=%u: " "append_sess() failed\n", isid, tsih, cid); /* Can't include in session */ StatusClass = 0x02; StatusDetail = 0x08; goto response; } } else { /* new session, drop old sess by the initiator */ istgt_iscsi_drop_old_conns(conn); } /* force target flags */ MTX_LOCK(&lu->mutex); if (lu->no_auth_chap) { conn->req_auth = 0; rc = istgt_iscsi_param_del(&conn->params, "AuthMethod"); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_del() failed\n"); goto error_return; } rc = istgt_iscsi_param_add(&conn->params, "AuthMethod", "None", "None", ISPT_LIST); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_add() failed\n"); goto error_return; } } else if (lu->auth_chap) { conn->req_auth = 1; rc = istgt_iscsi_param_del(&conn->params, "AuthMethod"); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_del() failed\n"); goto error_return; } rc = istgt_iscsi_param_add(&conn->params, "AuthMethod", "CHAP", "CHAP", ISPT_LIST); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_add() failed\n"); goto error_return; } } if (lu->auth_chap_mutual) { conn->req_mutual = 1; } if (lu->header_digest) { rc = istgt_iscsi_param_del(&conn->params, "HeaderDigest"); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_del() failed\n"); goto error_return; } rc = istgt_iscsi_param_add(&conn->params, "HeaderDigest", "CRC32C", "CRC32C", ISPT_LIST); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_add() failed\n"); goto error_return; } } if (lu->data_digest) { rc = istgt_iscsi_param_del(&conn->params, "DataDigest"); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_del() failed\n"); goto error_return; } rc = istgt_iscsi_param_add(&conn->params, "DataDigest", "CRC32C", "CRC32C", ISPT_LIST); if (rc < 0) { MTX_UNLOCK(&lu->mutex); ISTGT_ERRLOG("iscsi_param_add() failed\n"); goto error_return; } } MTX_UNLOCK(&lu->mutex); } else if (strcasecmp(session_type, "Discovery") == 0) { snprintf(conn->target_name, sizeof conn->target_name, "%s", "dummy"); snprintf(conn->target_port, sizeof conn->target_port, "%s" ",t,0x" "%4.4x", "dummy", conn->portal.tag); lu = NULL; tsih = 0; /* force target flags */ MTX_LOCK(&conn->istgt->mutex); if (conn->istgt->no_discovery_auth) { conn->req_auth = 0; rc = istgt_iscsi_param_del(&conn->params, "AuthMethod"); if (rc < 0) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("iscsi_param_del() failed\n"); goto error_return; } rc = istgt_iscsi_param_add(&conn->params, "AuthMethod", "None", "None", ISPT_LIST); if (rc < 0) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("iscsi_param_add() failed\n"); goto error_return; } } else if (conn->istgt->req_discovery_auth) { conn->req_auth = 1; rc = istgt_iscsi_param_del(&conn->params, "AuthMethod"); if (rc < 0) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("iscsi_param_del() failed\n"); goto error_return; } rc = istgt_iscsi_param_add(&conn->params, "AuthMethod", "CHAP", "CHAP", ISPT_LIST); if (rc < 0) { MTX_UNLOCK(&conn->istgt->mutex); ISTGT_ERRLOG("iscsi_param_add() failed\n"); goto error_return; } } if (conn->istgt->req_discovery_auth_mutual) { conn->req_mutual = 1; } MTX_UNLOCK(&conn->istgt->mutex); } else { ISTGT_ERRLOG("unknown session type\n"); /* Missing parameter */ StatusClass = 0x02; StatusDetail = 0x07; goto response; } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Target name: %s\n", conn->target_name); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Target port: %s\n", conn->target_port); conn->authenticated = 0; conn->auth.chap_phase = ISTGT_CHAP_PHASE_WAIT_A; conn->cid = cid; if (lu == NULL || lu->queue_depth == 0) { conn->queue_depth = ISCMDQ; } else { conn->queue_depth = lu->queue_depth; } conn->max_pending = (conn->queue_depth + 1) * 2; #if 0 /* override config setting */ MTX_LOCK(&conn->r2t_mutex); if ((conn->max_r2t > 0) && (conn->max_r2t < conn->max_pending)) { int i; xfree(conn->r2t_tasks); conn->max_r2t = conn->max_pending; conn->r2t_tasks = xmalloc (sizeof *conn->r2t_tasks * (conn->max_r2t + 1)); for (i = 0; i < (conn->max_r2t + 1); i++) { conn->r2t_tasks[i] = NULL; } } MTX_UNLOCK(&conn->r2t_mutex); #endif if (conn->sess == NULL) { /* new session */ rc = istgt_create_sess(conn->istgt, conn, lu); if (rc < 0) { ISTGT_ERRLOG("create_sess() failed\n"); goto error_return; } /* initialize parameters */ SESS_MTX_LOCK(conn); conn->StatSN = ExpStatSN; conn->MaxOutstandingR2T = conn->sess->MaxOutstandingR2T; conn->sess->isid = isid; conn->sess->tsih = tsih; conn->sess->lu = lu; conn->sess->ExpCmdSN = CmdSN; conn->sess->MaxCmdSN = CmdSN + conn->queue_depth - 1; SESS_MTX_UNLOCK(conn); } /* limit conns on discovery session */ if (strcasecmp(session_type, "Discovery") == 0) { SESS_MTX_LOCK(conn); conn->sess->MaxConnections = 1; rc = istgt_iscsi_param_set_int(conn->sess->params, "MaxConnections", conn->sess->MaxConnections); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } } /* declarative parameters */ if (lu != NULL) { MTX_LOCK(&lu->mutex); if (lu->alias != NULL) { snprintf(buf, sizeof buf, "%s", lu->alias); } else { snprintf(buf, sizeof buf, "%s", ""); } MTX_UNLOCK(&lu->mutex); SESS_MTX_LOCK(conn); rc = istgt_iscsi_param_set(conn->sess->params, "TargetAlias", buf); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } } snprintf(buf, sizeof buf, "%s:%s,%d", conn->portal.host, conn->portal.port, conn->portal.tag); SESS_MTX_LOCK(conn); rc = istgt_iscsi_param_set(conn->sess->params, "TargetAddress", buf); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } snprintf(buf, sizeof buf, "%d", conn->portal.tag); SESS_MTX_LOCK(conn); rc = istgt_iscsi_param_set(conn->sess->params, "TargetPortalGroupTag", buf); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } /* write in response */ if (lu != NULL) { SESS_MTX_LOCK(conn); val = ISCSI_GETVAL(conn->sess->params, "TargetAlias"); if (val != NULL && strlen(val) != 0) { data_len = istgt_iscsi_append_param(conn, "TargetAlias", data, alloc_len, data_len); } if (strcasecmp(session_type, "Discovery") == 0) { data_len = istgt_iscsi_append_param(conn, "TargetAddress", data, alloc_len, data_len); } data_len = istgt_iscsi_append_param(conn, "TargetPortalGroupTag", data, alloc_len, data_len); SESS_MTX_UNLOCK(conn); } /* start login phase */ conn->login_phase = ISCSI_LOGIN_PHASE_START; } /* negotiate parameters */ data_len = istgt_iscsi_negotiate_params(conn, params, data, alloc_len, data_len); ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "Negotiated Params", data, data_len); switch (CSG) { case 0: /* SecurityNegotiation */ auth_method = ISCSI_GETVAL(conn->params, "AuthMethod"); if (auth_method == NULL) { ISTGT_ERRLOG("AuthMethod is empty\n"); /* Missing parameter */ StatusClass = 0x02; StatusDetail = 0x07; goto response; } if (strcasecmp(auth_method, "None") == 0) { conn->authenticated = 1; } else { rc = istgt_iscsi_auth_params(conn, params, auth_method, data, alloc_len, data_len); if (rc < 0) { ISTGT_ERRLOG("iscsi_auth_params() failed\n"); /* Authentication failure */ StatusClass = 0x02; StatusDetail = 0x01; goto response; } data_len = rc; if (conn->authenticated == 0) { /* not complete */ T_bit = 0; } else { if (conn->auth.chap_phase != ISTGT_CHAP_PHASE_END) { ISTGT_WARNLOG("CHAP phase not complete"); } } #if 0 ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "Negotiated Auth Params", data, data_len); #endif } break; case 1: /* LoginOperationalNegotiation */ if (conn->login_phase == ISCSI_LOGIN_PHASE_START) { if (conn->req_auth) { /* Authentication failure */ StatusClass = 0x02; StatusDetail = 0x01; goto response; } else { /* AuthMethod=None */ conn->authenticated = 1; } } if (conn->authenticated == 0) { ISTGT_ERRLOG("authentication error\n"); /* Authentication failure */ StatusClass = 0x02; StatusDetail = 0x01; goto response; } break; case 3: /* FullFeaturePhase */ ISTGT_ERRLOG("XXX Login in FullFeaturePhase\n"); /* Initiator error */ StatusClass = 0x02; StatusDetail = 0x00; goto response; default: ISTGT_ERRLOG("unknown stage\n"); /* Initiator error */ StatusClass = 0x02; StatusDetail = 0x00; goto response; } if (T_bit) { switch (NSG) { case 0: /* SecurityNegotiation */ conn->login_phase = ISCSI_LOGIN_PHASE_SECURITY; break; case 1: /* LoginOperationalNegotiation */ conn->login_phase = ISCSI_LOGIN_PHASE_OPERATIONAL; break; case 3: /* FullFeaturePhase */ conn->login_phase = ISCSI_LOGIN_PHASE_FULLFEATURE; SESS_MTX_LOCK(conn); if (ISCSI_EQVAL(conn->sess->params, "SessionType", "Normal")) { /* normal session */ tsih = conn->sess->tsih; /* new tsih? */ if (tsih == 0) { tsih = istgt_lu_allocate_tsih(conn->sess->lu, conn->initiator_port, conn->portal.tag); if (tsih == 0) { SESS_MTX_UNLOCK(conn); ISTGT_ERRLOG("lu_allocate_tsih() failed\n"); goto error_return; } conn->sess->tsih = tsih; } else { /* multiple connection */ } snprintf(buf, sizeof buf, "Login from %s (%s) on %s LU%d" " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u," " CID=%u, HeaderDigest=%s, DataDigest=%s\n", conn->initiator_name, conn->initiator_addr, conn->target_name, conn->sess->lu->num, conn->portal.host, conn->portal.port, conn->portal.tag, conn->sess->isid, conn->sess->tsih, conn->cid, (ISCSI_EQVAL(conn->params, "HeaderDigest", "CRC32C") ? "on" : "off"), (ISCSI_EQVAL(conn->params, "DataDigest", "CRC32C") ? "on" : "off")); ISTGT_NOTICELOG("%s", buf); } else if (ISCSI_EQVAL(conn->sess->params, "SessionType", "Discovery")) { /* discovery session */ /* new tsih */ MTX_LOCK(&g_last_tsih_mutex); tsih = conn->sess->tsih; g_last_tsih++; tsih = g_last_tsih; if (tsih == 0) { g_last_tsih++; tsih = g_last_tsih; } conn->sess->tsih = tsih; MTX_UNLOCK(&g_last_tsih_mutex); snprintf(buf, sizeof buf, "Login(discovery) from %s (%s) on" " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u," " CID=%u, HeaderDigest=%s, DataDigest=%s\n", conn->initiator_name, conn->initiator_addr, conn->portal.host, conn->portal.port, conn->portal.tag, conn->sess->isid, conn->sess->tsih, conn->cid, (ISCSI_EQVAL(conn->params, "HeaderDigest", "CRC32C") ? "on" : "off"), (ISCSI_EQVAL(conn->params, "DataDigest", "CRC32C") ? "on" : "off")); ISTGT_NOTICELOG("%s", buf); } else { ISTGT_ERRLOG("unknown session type\n"); SESS_MTX_UNLOCK(conn); /* Initiator error */ StatusClass = 0x02; StatusDetail = 0x00; goto response; } SESS_MTX_UNLOCK(conn); conn->full_feature = 1; break; default: ISTGT_ERRLOG("unknown stage\n"); /* Initiator error */ StatusClass = 0x02; StatusDetail = 0x00; goto response; } } response: /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_LOGIN_RSP; BDADD8(&rsp[1], T_bit, 7); BDADD8(&rsp[1], C_bit, 6); BDADD8W(&rsp[1], CSG, 3, 2); BDADD8W(&rsp[1], NSG, 1, 2); rsp[2] = ISCSI_VERSION; // Version-max rsp[3] = ISCSI_VERSION; // Version-active rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], data_len); // DataSegmentLength DSET48(&rsp[8], isid); DSET16(&rsp[14], tsih); DSET32(&rsp[16], task_tag); if (conn->sess != NULL) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { DSET32(&rsp[24], conn->StatSN); conn->StatSN++; DSET32(&rsp[28], CmdSN); DSET32(&rsp[32], CmdSN); } rsp[36] = StatusClass; rsp[37] = StatusDetail; #if 1 ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "PDU", rsp, ISCSI_BHS_LEN); ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "DATA", data, data_len); #endif rc = istgt_iscsi_write_pdu(conn, &rsp_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); istgt_iscsi_param_free(params); xfree(data); return -1; } /* after send PDU digest on/off */ if (conn->full_feature) { /* update internal variables */ istgt_iscsi_copy_param2var(conn); /* check value */ rc = istgt_iscsi_check_values(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_check_values() failed\n"); istgt_iscsi_param_free(params); xfree(data); return -1; } } istgt_iscsi_param_free(params); xfree(data); return 0; } static int istgt_iscsi_op_text(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { ISCSI_PARAM *params = NULL; ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *cp; uint8_t *data; uint64_t lun; uint32_t task_tag; uint32_t transfer_tag; uint32_t CmdSN; uint32_t ExpStatSN; const char *iiqn; const char *val; int I_bit, F_bit, C_bit; int data_len; int alloc_len; int rc; if (!conn->full_feature) { ISTGT_ERRLOG("before Full Feature\n"); return -1; } data_len = 0; alloc_len = conn->sendbufsize; data = (uint8_t *) conn->sendbuf; memset(data, 0, alloc_len); cp = (uint8_t *) &pdu->bhs; I_bit = BGET8(&cp[0], 7); F_bit = BGET8(&cp[1], 7); C_bit = BGET8(&cp[1], 6); lun = DGET64(&cp[8]); task_tag = DGET32(&cp[16]); transfer_tag = DGET32(&cp[20]); CmdSN = DGET32(&cp[24]); ExpStatSN = DGET32(&cp[28]); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "I=%d, F=%d, C=%d, ITT=%x, TTT=%x\n", I_bit, F_bit, C_bit, task_tag, transfer_tag); SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", CmdSN, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); if (I_bit == 0) { if (SN32_LT(CmdSN, conn->sess->ExpCmdSN) || SN32_GT(CmdSN, conn->sess->MaxCmdSN)) { ISTGT_ERRLOG("CmdSN(%u) ignore (ExpCmdSN=%u, MaxCmdSN=%u)\n", CmdSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); return -1; } } else if (CmdSN != conn->sess->ExpCmdSN) { SESS_MTX_UNLOCK(conn); ISTGT_ERRLOG("CmdSN(%u) error\n", CmdSN); return -1; } if (SN32_GT(ExpStatSN, conn->StatSN)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "StatSN(%u) advanced\n", ExpStatSN); conn->StatSN = ExpStatSN; } if (ExpStatSN != conn->StatSN) { #if 0 ISTGT_ERRLOG("StatSN(%u) error\n", ExpStatSN); SESS_MTX_UNLOCK(conn); return -1; #else /* StarPort have a bug */ ISTGT_WARNLOG("StatSN(%u) rewound\n", ExpStatSN); conn->StatSN = ExpStatSN; #endif } SESS_MTX_UNLOCK(conn); if (F_bit && C_bit) { ISTGT_ERRLOG("final and continue\n"); return -1; } /* store incoming parameters */ rc = istgt_iscsi_parse_params(&params, pdu->data, pdu->data_segment_len); if (rc < 0) { ISTGT_ERRLOG("iscsi_parse_params() failed\n"); istgt_iscsi_param_free(params); return -1; } /* negotiate parameters */ data_len = istgt_iscsi_negotiate_params(conn, params, data, alloc_len, data_len); /* sendtargets is special case */ val = ISCSI_GETVAL(params, "SendTargets"); if (val != NULL) { if (strcasecmp(val, "") == 0) { val = conn->target_name; } SESS_MTX_LOCK(conn); iiqn = ISCSI_GETVAL(conn->sess->params, "InitiatorName"); if (ISCSI_EQVAL(conn->sess->params, "SessionType", "Discovery")) { data_len = istgt_lu_sendtargets(conn, conn->initiator_name, conn->initiator_addr, val, data, alloc_len, data_len); } else { if (strcasecmp(val, "ALL") == 0) { /* not in discovery session */ data_len = istgt_iscsi_append_text(conn, "SendTargets", "Reject", data, alloc_len, data_len); } else { data_len = istgt_lu_sendtargets(conn, conn->initiator_name, conn->initiator_addr, val, data, alloc_len, data_len); } } SESS_MTX_UNLOCK(conn); } ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "Negotiated Params", data, data_len); /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_TEXT_RSP; BDADD8(&rsp[1], F_bit, 7); BDADD8(&rsp[1], C_bit, 6); rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], data_len); // DataSegmentLength DSET64(&rsp[8], lun); DSET32(&rsp[16], task_tag); if (F_bit) { DSET32(&rsp[20], 0xffffffffU); } else { transfer_tag = 1 + conn->id; DSET32(&rsp[20], transfer_tag); } SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (I_bit == 0) { conn->sess->ExpCmdSN++; conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); rc = istgt_iscsi_write_pdu(conn, &rsp_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); istgt_iscsi_param_free(params); return -1; } /* update internal variables */ istgt_iscsi_copy_param2var(conn); /* check value */ rc = istgt_iscsi_check_values(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_check_values() failed\n"); istgt_iscsi_param_free(params); return -1; } istgt_iscsi_param_free(params); return 0; } static int istgt_iscsi_op_logout(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { char buf[MAX_TMPBUF]; ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *cp; uint8_t *data; uint32_t task_tag; uint16_t cid; uint32_t CmdSN; uint32_t ExpStatSN; int reason; int response; int data_len; int alloc_len; int rc; data_len = 0; alloc_len = conn->sendbufsize; data = (uint8_t *) conn->sendbuf; memset(data, 0, alloc_len); cp = (uint8_t *) &pdu->bhs; reason = BGET8W(&cp[1], 6, 7); task_tag = DGET32(&cp[16]); cid = DGET16(&cp[20]); CmdSN = DGET32(&cp[24]); ExpStatSN = DGET32(&cp[28]); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "reason=%d, ITT=%x, cid=%d\n", reason, task_tag, cid); if (conn->sess != NULL) { SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", CmdSN, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); if (CmdSN != conn->sess->ExpCmdSN) { ISTGT_WARNLOG("CmdSN(%u) might have dropped\n", CmdSN); /* ignore error */ } SESS_MTX_UNLOCK(conn); } else { ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u\n", CmdSN, ExpStatSN, conn->StatSN); } if (conn->sess != NULL) { SESS_MTX_LOCK(conn); } if (SN32_GT(ExpStatSN, conn->StatSN)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "StatSN(%u) advanced\n", ExpStatSN); conn->StatSN = ExpStatSN; } if (ExpStatSN != conn->StatSN) { ISTGT_WARNLOG("StatSN(%u/%u) might have dropped\n", ExpStatSN, conn->StatSN); /* ignore error */ } if (conn->sess != NULL) { SESS_MTX_UNLOCK(conn); } response = 0; // connection or session closed successfully /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_LOGOUT_RSP; BDADD8W(&rsp[1], 1, 7, 1); rsp[2] = response; rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], data_len); // DataSegmentLength DSET32(&rsp[16], task_tag); if (conn->sess != NULL) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (conn->sess->connections == 1) { conn->sess->ExpCmdSN++; conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { DSET32(&rsp[24], conn->StatSN); conn->StatSN++; DSET32(&rsp[28], CmdSN); DSET32(&rsp[32], CmdSN); } DSET16(&rsp[40], 0); // Time2Wait DSET16(&rsp[42], 0); // Time2Retain rc = istgt_iscsi_write_pdu(conn, &rsp_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } SESS_MTX_LOCK(conn); if (ISCSI_EQVAL(conn->sess->params, "SessionType", "Normal")) { snprintf(buf, sizeof buf, "Logout from %s (%s) on %s LU%d" " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u," " CID=%u, HeaderDigest=%s, DataDigest=%s\n", conn->initiator_name, conn->initiator_addr, conn->target_name, conn->sess->lu->num, conn->portal.host, conn->portal.port, conn->portal.tag, conn->sess->isid, conn->sess->tsih, conn->cid, (ISCSI_EQVAL(conn->params, "HeaderDigest", "CRC32C") ? "on" : "off"), (ISCSI_EQVAL(conn->params, "DataDigest", "CRC32C") ? "on" : "off")); ISTGT_NOTICELOG("%s", buf); } else { /* discovery session */ snprintf(buf, sizeof buf, "Logout(discovery) from %s (%s) on" " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u," " CID=%u, HeaderDigest=%s, DataDigest=%s\n", conn->initiator_name, conn->initiator_addr, conn->portal.host, conn->portal.port, conn->portal.tag, conn->sess->isid, conn->sess->tsih, conn->cid, (ISCSI_EQVAL(conn->params, "HeaderDigest", "CRC32C") ? "on" : "off"), (ISCSI_EQVAL(conn->params, "DataDigest", "CRC32C") ? "on" : "off")); ISTGT_NOTICELOG("%s", buf); } SESS_MTX_UNLOCK(conn); conn->exec_logout = 1; return 0; } static int istgt_iscsi_transfer_in_internal(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd); static int istgt_iscsi_transfer_in(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd) { int rc; //MTX_LOCK(&conn->wpdu_mutex); rc = istgt_iscsi_transfer_in_internal(conn, lu_cmd); //MTX_UNLOCK(&conn->wpdu_mutex); return rc; } static int istgt_iscsi_transfer_in_internal(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd) { ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *data; uint32_t task_tag; uint32_t transfer_tag; uint32_t DataSN; int transfer_len; int data_len; int segment_len; int offset; int F_bit, O_bit, U_bit, S_bit; int residual_len; int sent_status; int len; int rc; data = lu_cmd->data; transfer_len = lu_cmd->transfer_len; data_len = lu_cmd->data_len; segment_len = conn->MaxRecvDataSegmentLength; F_bit = O_bit = U_bit = S_bit = 0; if (data_len < transfer_len) { /* underflow */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Underflow %u/%u\n", data_len, transfer_len); residual_len = transfer_len - data_len; transfer_len = data_len; U_bit = 1; } else if (data_len > transfer_len) { /* overflow */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Overflow %u/%u\n", data_len, transfer_len); residual_len = data_len - transfer_len; O_bit = 1; } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfer %u\n", transfer_len); residual_len = 0; } task_tag = lu_cmd->task_tag; transfer_tag = 0xffffffffU; DataSN = 0; sent_status = 0; /* send data splitted by segment_len */ for (offset = 0; offset < transfer_len; offset += segment_len) { len = DMIN32(segment_len, (transfer_len - offset)); if (offset + len > transfer_len) { ISTGT_ERRLOG("transfer missing\n"); return -1; } else if (offset + len == transfer_len) { /* final PDU */ F_bit = 1; S_bit = 0; if (lu_cmd->sense_data_len == 0 && (lu_cmd->status == ISTGT_SCSI_STATUS_GOOD || lu_cmd->status == ISTGT_SCSI_STATUS_CONDITION_MET || lu_cmd->status == ISTGT_SCSI_STATUS_INTERMEDIATE || lu_cmd->status == ISTGT_SCSI_STATUS_INTERMEDIATE_CONDITION_MET)) { S_bit = 1; sent_status = 1; } } else { F_bit = 0; S_bit = 0; } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfer=%d, Offset=%d, Len=%d\n", transfer_len, offset, len); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "StatSN=%u, DataSN=%u, Offset=%u, Len=%d\n", conn->StatSN, DataSN, offset, len); /* DATA PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = data + offset; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_SCSI_DATAIN; BDADD8(&rsp[1], F_bit, 7); BDADD8(&rsp[1], 0, 6); // A_bit Acknowledge if (F_bit && S_bit) { BDADD8(&rsp[1], O_bit, 2); BDADD8(&rsp[1], U_bit, 1); } else { BDADD8(&rsp[1], 0, 2); BDADD8(&rsp[1], 0, 1); } BDADD8(&rsp[1], S_bit, 0); if (S_bit) { rsp[3] = lu_cmd->status; } else { rsp[3] = 0; // Status or Rsvd } rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], len); // DataSegmentLength DSET32(&rsp[16], task_tag); DSET32(&rsp[20], transfer_tag); SESS_MTX_LOCK(conn); if (S_bit) { DSET32(&rsp[24], conn->StatSN); conn->StatSN++; } else { DSET32(&rsp[24], 0); // StatSN or Reserved } if (F_bit && S_bit && lu_cmd->I_bit == 0) { conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); DSET32(&rsp[36], DataSN); DataSN++; DSET32(&rsp[40], (uint32_t) offset); if (F_bit && S_bit) { DSET32(&rsp[44], residual_len); } else { DSET32(&rsp[44], 0); } rc = istgt_iscsi_write_pdu_internal(conn, &rsp_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } } if (sent_status) { return 1; } return 0; } static int istgt_iscsi_op_scsi(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { ISTGT_LU_CMD lu_cmd; ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *cp; uint8_t *data; uint8_t *cdb; uint64_t lun; uint32_t task_tag; uint32_t transfer_len; uint32_t CmdSN; uint32_t ExpStatSN; size_t bidi_residual_len; size_t residual_len; size_t data_len; size_t alloc_len; int I_bit, F_bit, R_bit, W_bit, Attr_bit; int o_bit, u_bit, O_bit, U_bit; int rc; if (!conn->full_feature) { ISTGT_ERRLOG("before Full Feature\n"); return -1; } data_len = 0; alloc_len = conn->sendbufsize; data = (uint8_t *) conn->sendbuf; memset(data, 0, alloc_len); memset(&lu_cmd, 0, sizeof lu_cmd); cp = (uint8_t *) &pdu->bhs; I_bit = BGET8(&cp[0], 6); F_bit = BGET8(&cp[1], 7); R_bit = BGET8(&cp[1], 6); W_bit = BGET8(&cp[1], 5); Attr_bit = BGET8W(&cp[1], 2, 3); lun = DGET64(&cp[8]); task_tag = DGET32(&cp[16]); transfer_len = DGET32(&cp[20]); CmdSN = DGET32(&cp[24]); ExpStatSN = DGET32(&cp[28]); cdb = &cp[32]; ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "CDB", cdb, 16); #if 0 ISTGT_TRACEDUMP(ISTGT_TRACE_DEBUG, "PDU", cp, ISCSI_BHS_LEN); #endif ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "I=%d, F=%d, R=%d, W=%d, Attr=%d, ITT=%x, TL=%u\n", I_bit, F_bit, R_bit, W_bit, Attr_bit, task_tag, transfer_len); SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", CmdSN, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); if (I_bit == 0) { /* XXX MCS reverse order? */ if (SN32_GT(CmdSN, conn->sess->ExpCmdSN)) { if (conn->sess->connections > 1) { struct timespec abstime; time_t start, now; SESS_MTX_UNLOCK(conn); start = now = time(NULL); memset(&abstime, 0, sizeof abstime); abstime.tv_sec = now + (MAX_MCSREVWAIT / 1000); abstime.tv_nsec = (MAX_MCSREVWAIT % 1000) * 1000000; rc = 0; SESS_MTX_LOCK(conn); while (SN32_GT(CmdSN, conn->sess->ExpCmdSN)) { conn->sess->req_mcs_cond++; rc = pthread_cond_timedwait(&conn->sess->mcs_cond, &conn->sess->mutex, &abstime); if (rc == ETIMEDOUT) { if (SN32_GT(CmdSN, conn->sess->ExpCmdSN)) { rc = -1; /* timeout */ break; } /* OK cond */ rc = 0; break; } if (rc != 0) { break; } } if (rc < 0) { now = time(NULL); ISTGT_ERRLOG("MCS: CmdSN(%u) error ExpCmdSN=%u " "(time=%d)\n", CmdSN, conn->sess->ExpCmdSN, (int)difftime(now, start)); SESS_MTX_UNLOCK(conn); return -1; } #if 0 ISTGT_WARNLOG("MCS: reverse CmdSN=%u(retry=%d, yields=%d)\n", CmdSN, retry, try_yields); #endif } } } if (I_bit == 0) { if (SN32_LT(CmdSN, conn->sess->ExpCmdSN) || SN32_GT(CmdSN, conn->sess->MaxCmdSN)) { ISTGT_ERRLOG("CmdSN(%u) ignore (ExpCmdSN=%u, MaxCmdSN=%u)\n", CmdSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); return -1; } if (SN32_GT(CmdSN, conn->sess->ExpCmdSN)) { ISTGT_WARNLOG("CmdSN(%u) > ExpCmdSN(%u)\n", CmdSN, conn->sess->ExpCmdSN); conn->sess->ExpCmdSN = CmdSN; } } else if (CmdSN != conn->sess->ExpCmdSN) { SESS_MTX_UNLOCK(conn); ISTGT_ERRLOG("CmdSN(%u) error ExpCmdSN=%u\n", CmdSN, conn->sess->ExpCmdSN); return -1; } if (SN32_GT(ExpStatSN, conn->StatSN)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "StatSN(%u) advanced\n", ExpStatSN); conn->StatSN = ExpStatSN; } { uint32_t QCmdSN; //SESS_MTX_LOCK(conn); QCmdSN = conn->sess->MaxCmdSN - conn->sess->ExpCmdSN + 1; //SESS_MTX_UNLOCK(conn); QCmdSN += conn->queue_depth; if (SN32_LT(ExpStatSN + QCmdSN, conn->StatSN)) { ISTGT_ERRLOG("StatSN(%u/%u) QCmdSN(%u) error\n", ExpStatSN, conn->StatSN, QCmdSN); SESS_MTX_UNLOCK(conn); return -1; } } SESS_MTX_UNLOCK(conn); lu_cmd.pdu = pdu; SESS_MTX_LOCK(conn); lu_cmd.lu = conn->sess->lu; if (I_bit == 0) { conn->sess->ExpCmdSN++; if (conn->sess->req_mcs_cond > 0) { conn->sess->req_mcs_cond--; rc = pthread_cond_broadcast(&conn->sess->mcs_cond); if (rc != 0) { SESS_MTX_UNLOCK(conn); ISTGT_ERRLOG("cond_broadcast() failed\n"); return -1; } } } SESS_MTX_UNLOCK(conn); if (R_bit != 0 && W_bit != 0) { ISTGT_ERRLOG("Bidirectional CDB is not supported\n"); return -1; } lu_cmd.I_bit = I_bit; lu_cmd.F_bit = F_bit; lu_cmd.R_bit = R_bit; lu_cmd.W_bit = W_bit; lu_cmd.Attr_bit = Attr_bit; lu_cmd.lun = lun; lu_cmd.task_tag = task_tag; lu_cmd.transfer_len = transfer_len; lu_cmd.CmdSN = CmdSN; lu_cmd.cdb = cdb; lu_cmd.iobuf = conn->iobuf; lu_cmd.iobufsize = conn->iobufsize; lu_cmd.data = data; lu_cmd.data_len = 0; lu_cmd.alloc_len = alloc_len; lu_cmd.sense_data = conn->snsbuf; lu_cmd.sense_data_len = 0; lu_cmd.sense_alloc_len = conn->snsbufsize; /* need R2T? */ if ((W_bit && F_bit) && (conn->max_r2t > 0)) { if (lu_cmd.pdu->data_segment_len < transfer_len) { rc = istgt_add_transfer_task(conn, &lu_cmd); if (rc < 0) { ISTGT_ERRLOG("add_transfer_task() failed\n"); return -1; } } } /* execute SCSI command */ rc = istgt_lu_execute(conn, &lu_cmd); if (rc < 0) { ISTGT_ERRLOG("lu_execute() failed\n"); return -1; } switch (rc) { case ISTGT_LU_TASK_RESULT_QUEUE_OK: ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Queue OK\n"); return 0; case ISTGT_LU_TASK_RESULT_QUEUE_FULL: ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Queue Full\n"); ISTGT_WARNLOG("Queue Full\n"); break; case ISTGT_LU_TASK_RESULT_IMMEDIATE: ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Immediate\n"); break; default: ISTGT_ERRLOG("lu_execute() unknown rc=%d\n", rc); return -1; } /* transfer data from logical unit */ /* (direction is view of initiator side) */ if (lu_cmd.R_bit && (lu_cmd.status == ISTGT_SCSI_STATUS_GOOD || lu_cmd.sense_data_len != 0)) { rc = istgt_iscsi_transfer_in(conn, &lu_cmd); if (rc < 0) { ISTGT_ERRLOG("iscsi_transfer_in() failed\n"); return -1; } if (rc > 0) { /* sent status by last DATAIN PDU */ return 0; } } o_bit = u_bit = O_bit = U_bit = 0; bidi_residual_len = residual_len = 0; data_len = lu_cmd.data_len; if (transfer_len != 0 && lu_cmd.status == ISTGT_SCSI_STATUS_GOOD) { if (data_len < transfer_len) { /* underflow */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Underflow %zu/%u\n", data_len, transfer_len); residual_len = transfer_len - data_len; U_bit = 1; } else if (data_len > transfer_len) { /* overflow */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Overflow %zu/%u\n", data_len, transfer_len); residual_len = data_len - transfer_len; O_bit = 1; } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfer %u\n", transfer_len); } } /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = lu_cmd.sense_data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_SCSI_RSP; BDADD8(&rsp[1], 1, 7); BDADD8(&rsp[1], o_bit, 4); BDADD8(&rsp[1], u_bit, 3); BDADD8(&rsp[1], O_bit, 2); BDADD8(&rsp[1], U_bit, 1); rsp[2] = 0x00; // Command Completed at Target //rsp[2] = 0x01; // Target Failure rsp[3] = lu_cmd.status; rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], lu_cmd.sense_data_len); // DataSegmentLength DSET32(&rsp[16], task_tag); DSET32(&rsp[20], 0); // SNACK Tag SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (I_bit == 0) { conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); DSET32(&rsp[36], 0); // ExpDataSN DSET32(&rsp[40], bidi_residual_len); DSET32(&rsp[44], residual_len); rc = istgt_iscsi_write_pdu(conn, &rsp_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } return 0; } static int istgt_iscsi_task_transfer_out(CONN_Ptr conn, ISTGT_LU_TASK_Ptr lu_task) { ISTGT_LU_CMD_Ptr lu_cmd; uint32_t transfer_len; int rc; lu_cmd = &lu_task->lu_cmd; transfer_len = lu_cmd->transfer_len; rc = istgt_iscsi_transfer_out(conn, lu_cmd, lu_cmd->iobuf, lu_cmd->iobufsize, transfer_len); return rc; } static int istgt_iscsi_task_response(CONN_Ptr conn, ISTGT_LU_TASK_Ptr lu_task) { ISTGT_LU_CMD_Ptr lu_cmd; ISCSI_PDU rsp_pdu; uint8_t *rsp; uint32_t task_tag; uint32_t transfer_len; uint32_t CmdSN; size_t residual_len; size_t data_len; int I_bit; int o_bit, u_bit, O_bit, U_bit; int bidi_residual_len; int rc; lu_cmd = &lu_task->lu_cmd; transfer_len = lu_cmd->transfer_len; task_tag = lu_cmd->task_tag; I_bit = lu_cmd->I_bit; CmdSN = lu_cmd->CmdSN; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "SCSI response CmdSN=%u\n", CmdSN); /* transfer data from logical unit */ /* (direction is view of initiator side) */ if (lu_cmd->R_bit && (lu_cmd->status == ISTGT_SCSI_STATUS_GOOD || lu_cmd->sense_data_len != 0)) { if (lu_task->lock) { rc = istgt_iscsi_transfer_in_internal(conn, lu_cmd); } else { rc = istgt_iscsi_transfer_in(conn, lu_cmd); } if (rc < 0) { ISTGT_ERRLOG("iscsi_transfer_in() failed\n"); return -1; } if (rc > 0) { /* sent status by last DATAIN PDU */ return 0; } } o_bit = u_bit = O_bit = U_bit = 0; bidi_residual_len = residual_len = 0; data_len = lu_cmd->data_len; if (transfer_len != 0 && lu_cmd->status == ISTGT_SCSI_STATUS_GOOD) { if (data_len < transfer_len) { /* underflow */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Underflow %zu/%u\n", data_len, transfer_len); residual_len = transfer_len - data_len; U_bit = 1; } else if (data_len > transfer_len) { /* overflow */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Overflow %zu/%u\n", data_len, transfer_len); residual_len = data_len - transfer_len; O_bit = 1; } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfer %u\n", transfer_len); } } /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = lu_cmd->sense_data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_SCSI_RSP; BDADD8(&rsp[1], 1, 7); BDADD8(&rsp[1], o_bit, 4); BDADD8(&rsp[1], u_bit, 3); BDADD8(&rsp[1], O_bit, 2); BDADD8(&rsp[1], U_bit, 1); rsp[2] = 0x00; // Command Completed at Target //rsp[2] = 0x01; // Target Failure rsp[3] = lu_cmd->status; rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], lu_cmd->sense_data_len); // DataSegmentLength DSET32(&rsp[16], task_tag); DSET32(&rsp[20], 0); // SNACK Tag SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (I_bit == 0) { conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); DSET32(&rsp[36], 0); // ExpDataSN DSET32(&rsp[40], bidi_residual_len); DSET32(&rsp[44], residual_len); if (lu_task->lock) { rc = istgt_iscsi_write_pdu_internal(conn, &rsp_pdu); } else { rc = istgt_iscsi_write_pdu(conn, &rsp_pdu); } if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } return 0; } static int istgt_iscsi_op_task(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *cp; uint64_t lun; uint32_t task_tag; uint32_t ref_task_tag; uint32_t CmdSN; uint32_t ExpStatSN; uint32_t ref_CmdSN; uint32_t ExpDataSN; int I_bit; int function; int response; int rc; if (!conn->full_feature) { ISTGT_ERRLOG("before Full Feature\n"); return -1; } cp = (uint8_t *) &pdu->bhs; I_bit = BGET8(&cp[0], 6); function = BGET8W(&cp[1], 6, 7); lun = DGET64(&cp[8]); task_tag = DGET32(&cp[16]); ref_task_tag = DGET32(&cp[20]); CmdSN = DGET32(&cp[24]); ExpStatSN = DGET32(&cp[28]); ref_CmdSN = DGET32(&cp[32]); ExpDataSN = DGET32(&cp[36]); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "I=%d, func=%d, ITT=%x, ref TT=%x, LUN=0x%16.16"PRIx64"\n", I_bit, function, task_tag, ref_task_tag, lun); SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", CmdSN, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); if (CmdSN != conn->sess->ExpCmdSN) { ISTGT_WARNLOG("CmdSN(%u) might have dropped\n", conn->sess->ExpCmdSN); conn->sess->ExpCmdSN = CmdSN; } if (SN32_GT(ExpStatSN, conn->StatSN)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "StatSN(%u) advanced\n", ExpStatSN); conn->StatSN = ExpStatSN; } #if 0 /* not need */ if (ExpStatSN != conn->StatSN) { ISTGT_WARNLOG("StatSN(%u/%u) might have dropped\n", ExpStatSN, conn->StatSN); conn->StatSN = ExpStatSN; } #endif SESS_MTX_UNLOCK(conn); response = 0; // Function complete. switch (function) { case ISCSI_TASK_FUNC_ABORT_TASK: ISTGT_LOG("ABORT_TASK\n"); SESS_MTX_LOCK(conn); rc = istgt_lu_clear_task_ITLQ(conn, conn->sess->lu, lun, ref_CmdSN); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("LU reset failed\n"); } istgt_clear_transfer_task(conn, ref_CmdSN); break; case ISCSI_TASK_FUNC_ABORT_TASK_SET: ISTGT_LOG("ABORT_TASK_SET\n"); SESS_MTX_LOCK(conn); rc = istgt_lu_clear_task_ITL(conn, conn->sess->lu, lun); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("LU reset failed\n"); } istgt_clear_all_transfer_task(conn); break; case ISCSI_TASK_FUNC_CLEAR_ACA: ISTGT_LOG("CLEAR_ACA\n"); break; case ISCSI_TASK_FUNC_CLEAR_TASK_SET: ISTGT_LOG("CLEAR_TASK_SET\n"); SESS_MTX_LOCK(conn); rc = istgt_lu_clear_task_ITL(conn, conn->sess->lu, lun); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("LU reset failed\n"); } istgt_clear_all_transfer_task(conn); break; case ISCSI_TASK_FUNC_LOGICAL_UNIT_RESET: ISTGT_LOG("LOGICAL_UNIT_RESET\n"); istgt_iscsi_drop_all_conns(conn); SESS_MTX_LOCK(conn); rc = istgt_lu_reset(conn->sess->lu, lun); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("LU reset failed\n"); } //conn->state = CONN_STATE_EXITING; break; case ISCSI_TASK_FUNC_TARGET_WARM_RESET: ISTGT_LOG("TARGET_WARM_RESET\n"); istgt_iscsi_drop_all_conns(conn); SESS_MTX_LOCK(conn); rc = istgt_lu_reset(conn->sess->lu, lun); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("LU reset failed\n"); } //conn->state = CONN_STATE_EXITING; break; case ISCSI_TASK_FUNC_TARGET_COLD_RESET: ISTGT_LOG("TARGET_COLD_RESET\n"); istgt_iscsi_drop_all_conns(conn); SESS_MTX_LOCK(conn); rc = istgt_lu_reset(conn->sess->lu, lun); SESS_MTX_UNLOCK(conn); if (rc < 0) { ISTGT_ERRLOG("LU reset failed\n"); } conn->state = CONN_STATE_EXITING; break; case ISCSI_TASK_FUNC_TASK_REASSIGN: ISTGT_LOG("TASK_REASSIGN\n"); break; default: ISTGT_ERRLOG("unsupported function %d\n", function); response = 255; // Function rejected. break; } /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = NULL; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_TASK_RSP; BDADD8(&rsp[1], 1, 7); rsp[2] = response; rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], 0); // DataSegmentLength DSET32(&rsp[16], task_tag); if (conn->use_sender == 0) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (I_bit == 0) { conn->sess->ExpCmdSN++; conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { // update by sender } rc = istgt_iscsi_write_pdu_upd(conn, &rsp_pdu, I_bit); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } return 0; } static int istgt_iscsi_op_nopout(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { ISCSI_PDU rsp_pdu; uint8_t *rsp; uint8_t *cp; uint8_t *data; uint64_t lun; uint32_t task_tag; uint32_t transfer_tag; uint32_t CmdSN; uint32_t ExpStatSN; int I_bit; int ping_len; int data_len; int alloc_len; int rc; if (!conn->full_feature) { ISTGT_ERRLOG("before Full Feature\n"); return -1; } data_len = 0; alloc_len = conn->sendbufsize; data = (uint8_t *) conn->sendbuf; memset(data, 0, alloc_len); cp = (uint8_t *) &pdu->bhs; I_bit = BGET8(&cp[0], 6); ping_len = DGET24(&cp[5]); lun = DGET64(&cp[8]); task_tag = DGET32(&cp[16]); transfer_tag = DGET32(&cp[20]); CmdSN = DGET32(&cp[24]); ExpStatSN = DGET32(&cp[28]); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "I=%d, ITT=%x, TTT=%x\n", I_bit, task_tag, transfer_tag); SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", CmdSN, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); if (I_bit == 0) { if (SN32_LT(CmdSN, conn->sess->ExpCmdSN) || SN32_GT(CmdSN, conn->sess->MaxCmdSN)) { ISTGT_ERRLOG("CmdSN(%u) ignore (ExpCmdSN=%u, MaxCmdSN=%u)\n", CmdSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); return -1; } } else if (CmdSN != conn->sess->ExpCmdSN) { SESS_MTX_UNLOCK(conn); ISTGT_ERRLOG("CmdSN(%u) error ExpCmdSN=%u\n", CmdSN, conn->sess->ExpCmdSN); return -1; } if (SN32_GT(ExpStatSN, conn->StatSN)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "StatSN(%u) advanced\n", ExpStatSN); conn->StatSN = ExpStatSN; } { uint32_t QCmdSN; //SESS_MTX_LOCK(conn); QCmdSN = conn->sess->MaxCmdSN - conn->sess->ExpCmdSN + 1; //SESS_MTX_UNLOCK(conn); QCmdSN += conn->queue_depth; if (SN32_LT(ExpStatSN + QCmdSN, conn->StatSN)) { ISTGT_ERRLOG("StatSN(%u/%u) QCmdSN(%u) error\n", ExpStatSN, conn->StatSN, QCmdSN); SESS_MTX_UNLOCK(conn); return -1; } } SESS_MTX_UNLOCK(conn); if (task_tag == 0xffffffffU) { if (I_bit == 1) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "got NOPOUT ITT=0xffffffff\n"); return 0; } else { ISTGT_ERRLOG("got NOPOUT ITT=0xffffffff, I=0\n"); return -1; } } /* response of NOPOUT */ if (ping_len != 0) { if (ping_len > alloc_len) { data_len = DMIN32(alloc_len, conn->MaxRecvDataSegmentLength); } else { data_len = DMIN32(ping_len, conn->MaxRecvDataSegmentLength); } /* ping data */ memcpy(data, pdu->data, data_len); } transfer_tag = 0xffffffffU; /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = data; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_NOPIN; BDADD8(&rsp[1], 1, 7); rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], data_len); // DataSegmentLength DSET64(&rsp[8], lun); DSET32(&rsp[16], task_tag); DSET32(&rsp[20], transfer_tag); if (conn->use_sender == 0) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); conn->StatSN++; if (I_bit == 0) { conn->sess->ExpCmdSN++; conn->sess->MaxCmdSN++; } DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { // update by sender } rc = istgt_iscsi_write_pdu_upd(conn, &rsp_pdu, I_bit); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } return 0; } static ISTGT_R2T_TASK_Ptr istgt_allocate_transfer_task(void) { ISTGT_R2T_TASK_Ptr r2t_task; r2t_task = xmalloc(sizeof *r2t_task); memset(r2t_task, 0, sizeof *r2t_task); r2t_task->conn = NULL; r2t_task->lu = NULL; r2t_task->iobuf = NULL; return r2t_task; } static void istgt_free_transfer_task(ISTGT_R2T_TASK_Ptr r2t_task) { if (r2t_task == NULL) return; xfree(r2t_task->iobuf); xfree(r2t_task); } static ISTGT_R2T_TASK_Ptr istgt_get_transfer_task(CONN_Ptr conn, uint32_t transfer_tag) { ISTGT_R2T_TASK_Ptr r2t_task; int i; MTX_LOCK(&conn->r2t_mutex); if (conn->pending_r2t == 0) { MTX_UNLOCK(&conn->r2t_mutex); return NULL; } for (i = 0; i < conn->pending_r2t; i++) { r2t_task = conn->r2t_tasks[i]; #if 0 ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "CmdSN=%d, TransferTag=%x/%x\n", r2t_task->CmdSN, r2t_task->transfer_tag, transfer_tag); #endif if (r2t_task->transfer_tag == transfer_tag) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Match index=%d, CmdSN=%d, TransferTag=%x\n", i, r2t_task->CmdSN, r2t_task->transfer_tag); MTX_UNLOCK(&conn->r2t_mutex); return r2t_task; } } MTX_UNLOCK(&conn->r2t_mutex); return NULL; } static int istgt_add_transfer_task(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd) { ISTGT_R2T_TASK_Ptr r2t_task; uint32_t transfer_len; uint32_t transfer_tag; size_t first_burst_len; size_t max_burst_len; size_t data_len; size_t offset = 0; int len; int idx; int rc; MTX_LOCK(&conn->r2t_mutex); if (conn->pending_r2t >= conn->max_r2t) { // no slot available, skip now... //ISTGT_WARNLOG("No R2T space available (%d/%d)\n", // conn->pending_r2t, conn->max_r2t); MTX_UNLOCK(&conn->r2t_mutex); return 0; } MTX_UNLOCK(&conn->r2t_mutex); transfer_len = lu_cmd->transfer_len; transfer_tag = lu_cmd->task_tag; data_len = lu_cmd->pdu->data_segment_len; first_burst_len = conn->FirstBurstLength; max_burst_len = conn->MaxBurstLength; offset += data_len; if (offset >= first_burst_len) { len = DMIN32(max_burst_len, (transfer_len - offset)); r2t_task = istgt_allocate_transfer_task(); r2t_task->conn = conn; r2t_task->lu = lu_cmd->lu; r2t_task->lun = lu_cmd->lun; r2t_task->CmdSN = lu_cmd->CmdSN; r2t_task->task_tag = lu_cmd->task_tag; r2t_task->transfer_len = transfer_len; r2t_task->transfer_tag = transfer_tag; r2t_task->iobufsize = lu_cmd->transfer_len + 65536; r2t_task->iobuf = xmalloc(r2t_task->iobufsize); memcpy(r2t_task->iobuf, lu_cmd->pdu->data, data_len); r2t_task->offset = offset; r2t_task->R2TSN = 0; r2t_task->DataSN = 0; r2t_task->F_bit = lu_cmd->F_bit; MTX_LOCK(&conn->r2t_mutex); idx = conn->pending_r2t++; conn->r2t_tasks[idx] = r2t_task; MTX_UNLOCK(&conn->r2t_mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Send R2T(Offset=%d, Tag=%x)\n", r2t_task->offset, r2t_task->transfer_tag); rc = istgt_iscsi_send_r2t(conn, lu_cmd, r2t_task->offset, len, r2t_task->transfer_tag, &r2t_task->R2TSN); if (rc < 0) { ISTGT_ERRLOG("iscsi_send_r2t() failed\n"); return -1; } } return 0; } static void istgt_del_transfer_task(CONN_Ptr conn, ISTGT_R2T_TASK_Ptr r2t_task) { int found = 0; int i; if (r2t_task == NULL) return; MTX_LOCK(&conn->r2t_mutex); if (conn->pending_r2t == 0) { MTX_UNLOCK(&conn->r2t_mutex); return; } for (i = 0; i < conn->pending_r2t; i++) { if (conn->r2t_tasks[i] == r2t_task) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Remove R2T task conn id=%d, index=%d\n", conn->id, i); found = 1; break; } } if (found) { for ( ; i < conn->pending_r2t; i++) { conn->r2t_tasks[i] = conn->r2t_tasks[i + 1]; } conn->pending_r2t--; conn->r2t_tasks[conn->pending_r2t] = NULL; } MTX_UNLOCK(&conn->r2t_mutex); } static void istgt_clear_transfer_task(CONN_Ptr conn, uint32_t CmdSN) { int found = 0; int i; MTX_LOCK(&conn->r2t_mutex); if (conn->pending_r2t == 0) { MTX_UNLOCK(&conn->r2t_mutex); return; } for (i = 0; i < conn->pending_r2t; i++) { if (conn->r2t_tasks[i]->CmdSN == CmdSN) { istgt_free_transfer_task(conn->r2t_tasks[i]); conn->r2t_tasks[i] = NULL; found = 1; break; } } if (found) { for ( ; i < conn->pending_r2t; i++) { conn->r2t_tasks[i] = conn->r2t_tasks[i + 1]; } conn->pending_r2t--; conn->r2t_tasks[conn->pending_r2t] = NULL; } MTX_UNLOCK(&conn->r2t_mutex); } static void istgt_clear_all_transfer_task(CONN_Ptr conn) { int i; MTX_LOCK(&conn->r2t_mutex); if (conn->pending_r2t == 0) { MTX_UNLOCK(&conn->r2t_mutex); return; } for (i = 0; i < conn->pending_r2t; i++) { istgt_free_transfer_task(conn->r2t_tasks[i]); conn->r2t_tasks[i] = NULL; } conn->pending_r2t = 0; MTX_UNLOCK(&conn->r2t_mutex); } static int istgt_iscsi_op_data(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { ISTGT_R2T_TASK_Ptr r2t_task; uint8_t *cp; uint8_t *data; uint64_t lun; uint64_t current_lun; uint32_t current_task_tag; uint32_t current_transfer_tag; uint32_t ExpStatSN; uint32_t task_tag; uint32_t transfer_tag; uint32_t ExpDataSN; uint32_t DataSN; uint32_t buffer_offset; size_t data_len; size_t alloc_len; size_t offset; int F_bit; int rc; if (!conn->full_feature) { ISTGT_ERRLOG("before Full Feature\n"); return -1; } MTX_LOCK(&conn->r2t_mutex); if (conn->pending_r2t == 0) { ISTGT_ERRLOG("No R2T task\n"); MTX_UNLOCK(&conn->r2t_mutex); reject_return: rc = istgt_iscsi_reject(conn, pdu, 0x09); if (rc < 0) { ISTGT_ERRLOG("iscsi_reject() failed\n"); return -1; } return 0; } MTX_UNLOCK(&conn->r2t_mutex); cp = (uint8_t *) &pdu->bhs; F_bit = BGET8(&cp[1], 7); data_len = DGET24(&cp[5]); lun = DGET64(&cp[8]); task_tag = DGET32(&cp[16]); transfer_tag = DGET32(&cp[20]); ExpStatSN = DGET32(&cp[28]); DataSN = DGET32(&cp[36]); buffer_offset = DGET32(&cp[40]); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "pending R2T = %d\n", conn->pending_r2t); r2t_task = istgt_get_transfer_task(conn, transfer_tag); if (r2t_task == NULL) { ISTGT_ERRLOG("Not found R2T task for transfer_tag=%x\n", transfer_tag); goto reject_return; } current_lun = r2t_task->lun; current_task_tag = r2t_task->task_tag; current_transfer_tag = r2t_task->transfer_tag; offset = r2t_task->offset; data = r2t_task->iobuf; alloc_len = r2t_task->iobufsize; ExpDataSN = r2t_task->DataSN; ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "StatSN=%u, ExpStatSN=%u, DataSN=%u, Offset=%u, Data=%zd\n", conn->StatSN, ExpStatSN, DataSN, buffer_offset, data_len); if (DataSN != ExpDataSN) { ISTGT_ERRLOG("DataSN(%u) error\n", DataSN); return -1; } if (task_tag != current_task_tag) { ISTGT_ERRLOG("task_tag(%x/%x) error\n", task_tag, current_task_tag); return -1; } if (transfer_tag != current_transfer_tag) { ISTGT_ERRLOG("transfer_tag(%x/%x) error\n", transfer_tag, current_transfer_tag); return -1; } if (buffer_offset != offset) { ISTGT_ERRLOG("offset(%u) error\n", buffer_offset); return -1; } if (buffer_offset + data_len > alloc_len) { ISTGT_ERRLOG("offset error\n"); return -1; } memcpy(data + buffer_offset, pdu->data, data_len); offset += data_len; ExpDataSN++; r2t_task->offset = offset; r2t_task->DataSN = ExpDataSN; r2t_task->F_bit = F_bit; return 0; } static int istgt_iscsi_send_r2t(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd, int offset, int len, uint32_t transfer_tag, uint32_t *R2TSN) { ISCSI_PDU rsp_pdu; uint8_t *rsp; int rc; /* R2T PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = NULL; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_R2T; BDADD8(&rsp[1], 1, 7); rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], 0); // DataSegmentLength DSET64(&rsp[8], lu_cmd->lun); DSET32(&rsp[16], lu_cmd->task_tag); DSET32(&rsp[20], transfer_tag); if (conn->use_sender == 0) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { // update by sender } DSET32(&rsp[36], *R2TSN); *R2TSN += 1; DSET32(&rsp[40], (uint32_t) offset); DSET32(&rsp[44], (uint32_t) len); rc = istgt_iscsi_write_pdu_upd(conn, &rsp_pdu, 0); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } return 0; } int istgt_iscsi_transfer_out(CONN_Ptr conn, ISTGT_LU_CMD_Ptr lu_cmd, uint8_t *data, size_t alloc_len, size_t transfer_len) { ISTGT_R2T_TASK_Ptr r2t_task; ISCSI_PDU data_pdu; uint8_t *cp; uint64_t current_lun; uint64_t lun; uint32_t current_task_tag; uint32_t current_transfer_tag; uint32_t ExpDataSN; uint32_t task_tag; uint32_t transfer_tag; uint32_t ExpStatSN; uint32_t DataSN; uint32_t buffer_offset; uint32_t R2TSN; size_t data_len; size_t segment_len; size_t first_burst_len; size_t max_burst_len; size_t offset; int immediate, opcode; int F_bit; int len; int r2t_flag; int r2t_offset; int r2t_sent; int rc; current_lun = lu_cmd->lun; current_task_tag = lu_cmd->task_tag; current_transfer_tag = lu_cmd->task_tag; ExpDataSN = 0; segment_len = conn->MaxRecvDataSegmentLength; first_burst_len = conn->FirstBurstLength; max_burst_len = conn->MaxBurstLength; offset = 0; r2t_flag = 0; r2t_offset = 0; r2t_sent = 0; R2TSN = 0; cp = (uint8_t *) &lu_cmd->pdu->bhs; data_len = DGET24(&cp[5]); if (transfer_len > alloc_len) { ISTGT_ERRLOG("transfer_len > alloc_len\n"); return -1; } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfer=%zd, First=%zd, Max=%zd, Segment=%zd\n", transfer_len, data_len, max_burst_len, segment_len); r2t_task = istgt_get_transfer_task(conn, current_transfer_tag); if (r2t_task != NULL) { current_lun = r2t_task->lun; current_task_tag = r2t_task->task_tag; current_transfer_tag = r2t_task->transfer_tag; offset = r2t_task->offset; R2TSN = r2t_task->R2TSN; ExpDataSN = r2t_task->DataSN; F_bit = r2t_task->F_bit; r2t_flag = 1; data_len = 0; memcpy(data, r2t_task->iobuf, offset); istgt_del_transfer_task(conn, r2t_task); istgt_free_transfer_task(r2t_task); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Using R2T(%d) offset=%zd, DataSN=%d\n", conn->pending_r2t, offset, ExpDataSN); rc = istgt_queue_count(&conn->pending_pdus); if (rc > 0) { if (g_trace_flag) { ISTGT_WARNLOG("pending_pdus > 0\n"); } } if (offset < transfer_len) { if (offset >= (first_burst_len + max_burst_len)) { /* need more data */ r2t_flag = 0; } len = DMIN32(max_burst_len, (transfer_len - offset)); memset(&data_pdu.bhs, 0, ISCSI_BHS_LEN); data_pdu.ahs = NULL; data_pdu.data = NULL; data_pdu.copy_pdu = 0; goto r2t_retry; } else if (offset == transfer_len) { if (F_bit == 0) { ISTGT_ERRLOG("F_bit not set on the last PDU\n"); return -1; } } goto r2t_return; } if (data_len != 0) { if (data_len > first_burst_len) { ISTGT_ERRLOG("data_len > first_burst_len\n"); return -1; } if (offset + data_len > alloc_len) { ISTGT_ERRLOG("offset + data_len > alloc_len\n"); return -1; } memcpy(data + offset, lu_cmd->pdu->data, data_len); offset += data_len; r2t_offset = offset; } if (offset < transfer_len) { len = DMIN32(first_burst_len, (transfer_len - offset)); memset(&data_pdu.bhs, 0, ISCSI_BHS_LEN); data_pdu.ahs = NULL; data_pdu.data = NULL; data_pdu.copy_pdu = 0; do { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfer=%zd, Offset=%zd, Len=%d\n", transfer_len, offset, len); /* send R2T if required */ if (r2t_flag == 0 && (conn->sess->initial_r2t || offset >= first_burst_len)) { len = DMIN32(max_burst_len, (transfer_len - offset)); rc = istgt_iscsi_send_r2t(conn, lu_cmd, offset, len, current_transfer_tag, &R2TSN); if (rc < 0) { ISTGT_ERRLOG("iscsi_send_r2t() failed\n"); error_return: if (data_pdu.copy_pdu == 0) { xfree(data_pdu.ahs); data_pdu.ahs = NULL; if (data_pdu.data != data_pdu.shortdata) { xfree(data_pdu.data); } data_pdu.data = NULL; } return -1; } r2t_flag = 1; r2t_offset = offset; r2t_sent = 1; ExpDataSN = 0; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "R2T, Transfer=%zd, Offset=%zd, Len=%d\n", transfer_len, offset, len); } else { r2t_sent = 0; } /* transfer by segment_len */ rc = istgt_iscsi_read_pdu(conn, &data_pdu); if (rc < 0) { //ISTGT_ERRLOG("iscsi_read_pdu() failed\n"); ISTGT_ERRLOG("iscsi_read_pdu() failed, r2t_sent=%d\n", r2t_sent); goto error_return; } immediate = BGET8W(&data_pdu.bhs.opcode, 6, 1); opcode = BGET8W(&data_pdu.bhs.opcode, 5, 6); cp = (uint8_t *) &data_pdu.bhs; F_bit = BGET8(&cp[1], 7); data_len = DGET24(&cp[5]); lun = DGET64(&cp[8]); task_tag = DGET32(&cp[16]); transfer_tag = DGET32(&cp[20]); ExpStatSN = DGET32(&cp[28]); DataSN = DGET32(&cp[36]); buffer_offset = DGET32(&cp[40]); /* current tag DATA? */ if (opcode == ISCSI_OP_SCSI_DATAOUT) { if (task_tag != current_task_tag) { not_current_tag: //ISTGT_LOG("not task_tag received\n"); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "not task_tag received\n"); rc = istgt_iscsi_op_data(conn, &data_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_data() failed\n"); goto error_return; } if (data_pdu.data != data_pdu.shortdata) { xfree(data_pdu.data); } data_pdu.ahs = NULL; data_pdu.data = NULL; data_pdu.copy_pdu = 0; continue; } if (transfer_tag != current_transfer_tag) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "not transfer_tag received\n"); goto not_current_tag; } } if (opcode != ISCSI_OP_SCSI_DATAOUT) { ISCSI_PDU_Ptr save_pdu; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "non DATAOUT PDU received and pending" " (OP=0x%x)\n", opcode); rc = istgt_queue_count(&conn->pending_pdus); if (rc > conn->max_pending) { ISTGT_ERRLOG("pending queue(%d) is full\n", conn->max_pending); goto error_return; } save_pdu = xmalloc(sizeof *save_pdu); memset(save_pdu, 0, sizeof *save_pdu); rc = istgt_iscsi_copy_pdu(save_pdu, &data_pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_copy_pdu() failed\n"); xfree(save_pdu); save_pdu = NULL; goto error_return; } rc = istgt_queue_enqueue(&conn->pending_pdus, save_pdu); if (rc < 0) { ISTGT_ERRLOG("queue_enqueue() failed\n"); xfree(save_pdu->ahs); save_pdu->ahs = NULL; if (save_pdu->data != save_pdu->shortdata) { xfree(save_pdu->data); } save_pdu->data = NULL; xfree(save_pdu); save_pdu = NULL; goto error_return; } data_pdu.ahs = NULL; data_pdu.data = NULL; data_pdu.copy_pdu = 0; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "non DATAOUT PDU pending\n"); continue; } ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "StatSN=%u, " "ExpStatSN=%u, DataSN=%u, Offset=%u, Data=%zd\n", conn->StatSN, ExpStatSN, DataSN, buffer_offset, data_len); if (DataSN != ExpDataSN) { ISTGT_ERRLOG("DataSN(%u) error\n", DataSN); goto error_return; } #if 0 /* not check in DATAOUT */ if (ExpStatSN != conn->StatSN) { ISTGT_ERRLOG("StatSN(%u) error\n", conn->StatSN); goto error_return; } #endif #if 0 /* not check in DATAOUT */ if (lun != current_lun) { #if 0 ISTGT_ERRLOG("lun(0x%16.16"PRIx64") error\n", lun); goto error_return; #else ISTGT_WARNLOG("lun(0x%16.16"PRIx64")\n", lun); #endif } #endif if (task_tag != current_task_tag) { ISTGT_ERRLOG("task_tag(%x/%x) error\n", task_tag, current_task_tag); goto error_return; } if (transfer_tag != current_transfer_tag) { ISTGT_ERRLOG("transfer_tag(%x/%x) error\n", transfer_tag, current_transfer_tag); goto error_return; } if (buffer_offset != offset) { ISTGT_ERRLOG("offset(%u) error\n", buffer_offset); goto error_return; } if (buffer_offset + data_len > alloc_len) { ISTGT_ERRLOG("offset error\n"); goto error_return; } memcpy(data + buffer_offset, data_pdu.data, data_len); offset += data_len; len -= data_len; ExpDataSN++; if (r2t_flag == 0 && (offset > first_burst_len)) { ISTGT_ERRLOG("data_len(%zd) > first_burst_length(%zd)", offset, first_burst_len); goto error_return; } if (F_bit != 0 && len != 0) { if (offset < transfer_len) { r2t_flag = 0; goto r2t_retry; } ISTGT_ERRLOG("Expecting more data %d\n", len); goto error_return; } if (F_bit == 0 && len == 0) { ISTGT_ERRLOG("F_bit not set on the last PDU\n"); goto error_return; } if (len == 0) { r2t_flag = 0; } r2t_retry: if (data_pdu.copy_pdu == 0) { xfree(data_pdu.ahs); data_pdu.ahs = NULL; if (data_pdu.data != data_pdu.shortdata) { xfree(data_pdu.data); } data_pdu.data = NULL; } } while (offset < transfer_len); cp = (uint8_t *) &data_pdu.bhs; F_bit = BGET8(&cp[1], 7); if (F_bit == 0) { ISTGT_ERRLOG("F_bit not set on the last PDU\n"); return -1; } } else { cp = (uint8_t *) &lu_cmd->pdu->bhs; F_bit = BGET8(&cp[1], 7); if (F_bit == 0) { ISTGT_ERRLOG("F_bit not set on the last PDU\n"); return -1; } } r2t_return: ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "Transfered=%zd, Offset=%zd\n", transfer_len, offset); return 0; } static int istgt_iscsi_send_nopin(CONN_Ptr conn) { ISCSI_PDU rsp_pdu; uint8_t *rsp; uint64_t lun; uint32_t task_tag; uint32_t transfer_tag; int rc; if (conn->sess == NULL) { return 0; } if (!conn->full_feature) { ISTGT_ERRLOG("before Full Feature\n"); return -1; } SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "send NOPIN isid=%"PRIx64", tsih=%u, cid=%u\n", conn->sess->isid, conn->sess->tsih, conn->cid); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n", conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); /* without wanting NOPOUT */ lun = 0; task_tag = 0xffffffffU; transfer_tag = 0xffffffffU; /* response PDU */ rsp = (uint8_t *) &rsp_pdu.bhs; rsp_pdu.data = NULL; memset(rsp, 0, ISCSI_BHS_LEN); rsp[0] = ISCSI_OP_NOPIN; BDADD8(&rsp[1], 1, 7); rsp[4] = 0; // TotalAHSLength DSET24(&rsp[5], 0); // DataSegmentLength DSET64(&rsp[8], lun); DSET32(&rsp[16], task_tag); DSET32(&rsp[20], transfer_tag); if (conn->use_sender == 0) { SESS_MTX_LOCK(conn); DSET32(&rsp[24], conn->StatSN); DSET32(&rsp[28], conn->sess->ExpCmdSN); DSET32(&rsp[32], conn->sess->MaxCmdSN); SESS_MTX_UNLOCK(conn); } else { // update by sender } rc = istgt_iscsi_write_pdu_upd(conn, &rsp_pdu, 0); if (rc < 0) { ISTGT_ERRLOG("iscsi_write_pdu() failed\n"); return -1; } return 0; } static int istgt_iscsi_execute(CONN_Ptr conn, ISCSI_PDU_Ptr pdu) { int immediate, opcode; int rc; if (pdu == NULL) return -1; immediate = BGET8W(&conn->pdu.bhs.opcode, 6, 1); opcode = BGET8W(&conn->pdu.bhs.opcode, 5, 6); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "opcode %x\n", opcode); switch(opcode) { case ISCSI_OP_NOPOUT: rc = istgt_iscsi_op_nopout(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_nopout() failed\n"); return -1; } break; case ISCSI_OP_SCSI: rc = istgt_iscsi_op_scsi(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_scsi() failed\n"); return -1; } break; case ISCSI_OP_TASK: rc = istgt_iscsi_op_task(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_task() failed\n"); return -1; } break; case ISCSI_OP_LOGIN: rc = istgt_iscsi_op_login(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_login() failed\n"); return -1; } break; case ISCSI_OP_TEXT: rc = istgt_iscsi_op_text(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_text() failed\n"); return -1; } break; case ISCSI_OP_LOGOUT: rc = istgt_iscsi_op_logout(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_logout() failed\n"); return -1; } break; case ISCSI_OP_SCSI_DATAOUT: rc = istgt_iscsi_op_data(conn, pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_op_data() failed\n"); return -1; } break; case ISCSI_OP_SNACK: ISTGT_ERRLOG("got SNACK\n"); goto error_out; default: error_out: ISTGT_ERRLOG("unsupported opcode %x\n", opcode); rc = istgt_iscsi_reject(conn, pdu, 0x04); if (rc < 0) { ISTGT_ERRLOG("iscsi_reject() failed\n"); return -1; } break; } return 0; } static void wait_all_task(CONN_Ptr conn) { ISTGT_LU_TASK_Ptr lu_task; #ifdef ISTGT_USE_KQUEUE int kq; struct kevent kev; struct timespec kev_timeout; #else struct pollfd fds[1]; #endif /* ISTGT_USE_KQUEUE */ int msec = 30 * 1000; int rc; if (conn->running_tasks == 0) return; #ifdef ISTGT_USE_KQUEUE kq = kqueue(); if (kq == -1) { ISTGT_ERRLOG("kqueue() failed\n"); return; } ISTGT_EV_SET(&kev, conn->task_pipe[0], EVFILT_READ, EV_ADD, 0, 0, NULL); rc = kevent(kq, &kev, 1, NULL, 0, NULL); if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); close(kq); return; } #else fds[0].fd = conn->task_pipe[0]; fds[0].events = POLLIN; #endif /* ISTGT_USE_KQUEUE */ /* wait all running tasks */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "waiting task start (%d) (left %d tasks)\n", conn->id, conn->running_tasks); while (1) { #ifdef ISTGT_USE_KQUEUE kev_timeout.tv_sec = msec / 1000; kev_timeout.tv_nsec = (msec % 1000) * 1000000; rc = kevent(kq, NULL, 0, &kev, 1, &kev_timeout); if (rc == -1 && errno == EINTR) { continue; } if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); break; } if (rc == 0) { ISTGT_ERRLOG("waiting task timeout (left %d tasks)\n", conn->running_tasks); break; } #else rc = poll(fds, 1, msec); if (rc == -1 && errno == EINTR) { continue; } if (rc == -1) { ISTGT_ERRLOG("poll() failed\n"); break; } if (rc == 0) { ISTGT_ERRLOG("waiting task timeout (left %d tasks)\n", conn->running_tasks); break; } #endif /* ISTGT_USE_KQUEUE */ #ifdef ISTGT_USE_KQUEUE if (kev.ident == (uintptr_t)conn->task_pipe[0]) { if (kev.flags & (EV_EOF|EV_ERROR)) { break; } #else if (fds[0].revents & POLLHUP) { break; } if (fds[0].revents & POLLIN) { #endif /* ISTGT_USE_KQUEUE */ char tmp[1]; rc = read(conn->task_pipe[0], tmp, 1); if (rc < 0 || rc == 0 || rc != 1) { ISTGT_ERRLOG("read() failed\n"); break; } MTX_LOCK(&conn->task_queue_mutex); lu_task = istgt_queue_dequeue(&conn->task_queue); MTX_UNLOCK(&conn->task_queue_mutex); if (lu_task != NULL) { if (lu_task->lu_cmd.W_bit) { /* write */ if (lu_task->req_transfer_out != 0) { /* error transfer */ lu_task->error = 1; lu_task->abort = 1; rc = pthread_cond_broadcast(&lu_task->trans_cond); if (rc != 0) { ISTGT_ERRLOG("cond_broadcast() failed\n"); /* ignore error */ } } else { if (lu_task->req_execute) { conn->running_tasks--; if (conn->running_tasks == 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "task cleanup finished\n"); break; } } /* ignore response */ rc = istgt_lu_destroy_task(lu_task); if (rc < 0) { ISTGT_ERRLOG("lu_destroy_task() failed\n"); /* ignore error */ } } } else { /* read or no data */ /* ignore response */ rc = istgt_lu_destroy_task(lu_task); if (rc < 0) { ISTGT_ERRLOG("lu_destroy_task() failed\n"); /* ignore error */ } } } else { ISTGT_ERRLOG("lu_task is NULL\n"); break; } } } istgt_clear_all_transfer_task(conn); #ifdef ISTGT_USE_KQUEUE close(kq); #endif /* ISTGT_USE_KQUEUE */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "waiting task end (%d) (left %d tasks)\n", conn->id, conn->running_tasks); } static void worker_cleanup(void *arg) { CONN_Ptr conn = (CONN_Ptr) arg; ISTGT_LU_Ptr lu; int rc; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "worker_cleanup\n"); ISTGT_WARNLOG("force cleanup execute\n"); /* cleanup */ pthread_mutex_unlock(&conn->task_queue_mutex); pthread_mutex_unlock(&conn->result_queue_mutex); if (conn->sess != NULL) { if (conn->sess->lu != NULL) { pthread_mutex_unlock(&conn->sess->lu->mutex); } pthread_mutex_unlock(&conn->sess->mutex); } if (conn->exec_lu_task != NULL) { conn->exec_lu_task->error = 1; pthread_cond_broadcast(&conn->exec_lu_task->trans_cond); pthread_mutex_unlock(&conn->exec_lu_task->trans_mutex); } pthread_mutex_unlock(&conn->wpdu_mutex); pthread_mutex_unlock(&conn->r2t_mutex); pthread_mutex_unlock(&conn->istgt->mutex); pthread_mutex_unlock(&g_conns_mutex); pthread_mutex_unlock(&g_last_tsih_mutex); conn->state = CONN_STATE_EXITING; if (conn->sess != NULL) { SESS_MTX_LOCK(conn); lu = conn->sess->lu; if (lu != NULL && lu->queue_depth != 0) { rc = istgt_lu_clear_task_IT(conn, lu); if (rc < 0) { ISTGT_ERRLOG("lu_clear_task_IT() failed\n"); } istgt_clear_all_transfer_task(conn); } SESS_MTX_UNLOCK(conn); } if (conn->pdu.copy_pdu == 0) { xfree(conn->pdu.ahs); conn->pdu.ahs = NULL; if (conn->pdu.data != conn->pdu.shortdata) { xfree(conn->pdu.data); } conn->pdu.data = NULL; } wait_all_task(conn); if (conn->use_sender) { pthread_cond_broadcast(&conn->result_queue_cond); pthread_join(conn->sender_thread, NULL); } close(conn->sock); #ifdef ISTGT_USE_KQUEUE close(conn->kq); conn->kq = -1; #endif /* ISTGT_USE_KQUEUE */ sleep(1); /* cleanup conn & sess */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cancel cleanup LOCK\n"); MTX_LOCK(&g_conns_mutex); g_conns[conn->id] = NULL; istgt_remove_conn(conn); MTX_UNLOCK(&g_conns_mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cancel cleanup UNLOCK\n"); return; } static void * sender(void *arg) { CONN_Ptr conn = (CONN_Ptr) arg; ISTGT_LU_TASK_Ptr lu_task; struct timespec abstime; time_t now; int rc; #ifdef HAVE_PTHREAD_SET_NAME_NP { char buf[MAX_TMPBUF]; snprintf(buf, sizeof buf, "sendthread #%d", conn->id); pthread_set_name_np(conn->sender_thread, buf); } #endif memset(&abstime, 0, sizeof abstime); /* handle DATA-IN/SCSI status */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "sender loop start (%d)\n", conn->id); //MTX_LOCK(&conn->sender_mutex); while (1) { if (conn->state != CONN_STATE_RUNNING) { break; } MTX_LOCK(&conn->result_queue_mutex); lu_task = istgt_queue_dequeue(&conn->result_queue); if (lu_task == NULL) { now = time(NULL); abstime.tv_sec = now + conn->timeout; abstime.tv_nsec = 0; rc = pthread_cond_timedwait(&conn->result_queue_cond, &conn->result_queue_mutex, &abstime); if (rc == ETIMEDOUT) { /* nothing */ } lu_task = istgt_queue_dequeue(&conn->result_queue); if (lu_task == NULL) { MTX_UNLOCK(&conn->result_queue_mutex); continue; } } MTX_UNLOCK(&conn->result_queue_mutex); /* send all responses */ // MTX_LOCK(&conn->wpdu_mutex); do { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "task response CmdSN=%u\n", lu_task->lu_cmd.CmdSN); lu_task->lock = 1; if (lu_task->type == ISTGT_LU_TASK_RESPONSE) { /* send DATA-IN, SCSI status */ rc = istgt_iscsi_task_response(conn, lu_task); if (rc < 0) { lu_task->error = 1; ISTGT_ERRLOG( "iscsi_task_response() CmdSN=%u failed" " on %s(%s)\n", lu_task->lu_cmd.CmdSN, conn->target_port, conn->initiator_port); rc = write(conn->task_pipe[1], "E", 1); if(rc < 0 || rc != 1) { ISTGT_ERRLOG("write() failed\n"); } break; } rc = istgt_lu_destroy_task(lu_task); if (rc < 0) { ISTGT_ERRLOG("lu_destroy_task() failed\n"); break; } } else if (lu_task->type == ISTGT_LU_TASK_REQPDU) { reqpdu: /* send PDU */ rc = istgt_iscsi_write_pdu_internal(lu_task->conn, lu_task->lu_cmd.pdu); if (rc < 0) { lu_task->error = 1; ISTGT_ERRLOG( "iscsi_write_pdu() failed on %s(%s)\n", lu_task->conn->target_port, lu_task->conn->initiator_port); rc = write(conn->task_pipe[1], "E", 1); if(rc < 0 || rc != 1) { ISTGT_ERRLOG("write() failed\n"); } break; } /* free allocated memory by caller */ xfree(lu_task); } else if (lu_task->type == ISTGT_LU_TASK_REQUPDPDU) { rc = istgt_update_pdu(lu_task->conn, &lu_task->lu_cmd); if (rc < 0) { lu_task->error = 1; ISTGT_ERRLOG( "update_pdu() failed on %s(%s)\n", lu_task->conn->target_port, lu_task->conn->initiator_port); rc = write(conn->task_pipe[1], "E", 1); if(rc < 0 || rc != 1) { ISTGT_ERRLOG("write() failed\n"); } break; } goto reqpdu; } else { ISTGT_ERRLOG("Unknown task type %x\n", lu_task->type); rc = -1; } // conn is running? if (conn->state != CONN_STATE_RUNNING) { //ISTGT_WARNLOG("exit thread\n"); break; } MTX_LOCK(&conn->result_queue_mutex); lu_task = istgt_queue_dequeue(&conn->result_queue); MTX_UNLOCK(&conn->result_queue_mutex); } while (lu_task != NULL); // MTX_UNLOCK(&conn->wpdu_mutex); } //MTX_UNLOCK(&conn->sender_mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "sender loop ended (%d)\n", conn->id); return NULL; } static void * worker(void *arg) { CONN_Ptr conn = (CONN_Ptr) arg; ISTGT_LU_TASK_Ptr lu_task; ISTGT_LU_Ptr lu; ISCSI_PDU_Ptr pdu; sigset_t signew, sigold; #ifdef ISTGT_USE_KQUEUE int kq; struct kevent kev; struct timespec kev_timeout; #else struct pollfd fds[2]; int nopin_timer; #endif /* ISTGT_USE_KQUEUE */ int opcode; int rc; ISTGT_TRACELOG(ISTGT_TRACE_NET, "connect to %s:%s,%d\n", conn->portal.host, conn->portal.port, conn->portal.tag); #ifdef ISTGT_USE_KQUEUE kq = kqueue(); if (kq == -1) { ISTGT_ERRLOG("kqueue() failed\n"); return NULL; } conn->kq = kq; #if defined (ISTGT_USE_IOVEC) && defined (NOTE_LOWAT) ISTGT_EV_SET(&kev, conn->sock, EVFILT_READ, EV_ADD, NOTE_LOWAT, ISCSI_BHS_LEN, NULL); #else ISTGT_EV_SET(&kev, conn->sock, EVFILT_READ, EV_ADD, 0, 0, NULL); #endif rc = kevent(kq, &kev, 1, NULL, 0, NULL); if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); close(kq); return NULL; } ISTGT_EV_SET(&kev, conn->task_pipe[0], EVFILT_READ, EV_ADD, 0, 0, NULL); rc = kevent(kq, &kev, 1, NULL, 0, NULL); if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); close(kq); return NULL; } if (!conn->istgt->daemon) { ISTGT_EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); rc = kevent(kq, &kev, 1, NULL, 0, NULL); if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); close(kq); return NULL; } ISTGT_EV_SET(&kev, SIGTERM, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL); rc = kevent(kq, &kev, 1, NULL, 0, NULL); if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); close(kq); return NULL; } } #else memset(&fds, 0, sizeof fds); fds[0].fd = conn->sock; fds[0].events = POLLIN; fds[1].fd = conn->task_pipe[0]; fds[1].events = POLLIN; #endif /* ISTGT_USE_KQUEUE */ conn->pdu.ahs = NULL; conn->pdu.data = NULL; conn->pdu.copy_pdu = 0; conn->state = CONN_STATE_RUNNING; conn->exec_lu_task = NULL; lu_task = NULL; pthread_cleanup_push(worker_cleanup, conn); pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL); conn->use_sender = 0; if (conn->istgt->swmode >= ISTGT_SWMODE_NORMAL) { /* create sender thread */ #ifdef ISTGT_STACKSIZE rc = pthread_create(&conn->sender_thread, &conn->istgt->attr, &sender, (void *)conn); #else rc = pthread_create(&conn->sender_thread, NULL, &sender, (void *)conn); #endif if (rc != 0) { ISTGT_ERRLOG("pthread_create() failed\n"); goto cleanup_exit; } conn->use_sender = 1; } conn->wsock = conn->sock; sigemptyset(&signew); sigemptyset(&sigold); sigaddset(&signew, ISTGT_SIGWAKEUP); pthread_sigmask(SIG_UNBLOCK, &signew, &sigold); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "loop start (%d)\n", conn->id); #ifndef ISTGT_USE_KQUEUE nopin_timer = conn->nopininterval; #endif /* !ISTGT_USE_KQUEUE */ while (1) { /* check exit request */ if (conn->sess != NULL) { SESS_MTX_LOCK(conn); lu = conn->sess->lu; SESS_MTX_UNLOCK(conn); } else { lu = NULL; } if (lu != NULL) { if (istgt_lu_get_state(lu) != ISTGT_STATE_RUNNING) { conn->state = CONN_STATE_EXITING; break; } } else { if (istgt_get_state(conn->istgt) != ISTGT_STATE_RUNNING) { conn->state = CONN_STATE_EXITING; break; } } pthread_testcancel(); if (conn->state != CONN_STATE_RUNNING) { break; } #ifdef ISTGT_USE_KQUEUE ISTGT_TRACELOG(ISTGT_TRACE_NET, "kevent sock %d (timeout %dms)\n", conn->sock, conn->nopininterval); if (conn->nopininterval != 0) { kev_timeout.tv_sec = conn->nopininterval / 1000; kev_timeout.tv_nsec = (conn->nopininterval % 1000) * 1000000; } else { kev_timeout.tv_sec = DEFAULT_NOPININTERVAL; kev_timeout.tv_nsec = 0; } rc = kevent(kq, NULL, 0, &kev, 1, &kev_timeout); if (rc == -1 && errno == EINTR) { //ISTGT_ERRLOG("EINTR kevent\n"); continue; } if (rc == -1) { ISTGT_ERRLOG("kevent() failed\n"); break; } if (rc == 0) { /* idle timeout, send diagnosis packet */ if (conn->nopininterval != 0) { rc = istgt_iscsi_send_nopin(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_send_nopin() failed\n"); break; } } continue; } if (kev.filter == EVFILT_SIGNAL) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "kevent SIGNAL\n"); if (kev.ident == SIGINT || kev.ident == SIGTERM) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "kevent SIGNAL SIGINT/SIGTERM\n"); break; } continue; } #else //ISTGT_TRACELOG(ISTGT_TRACE_NET, "poll sock %d\n", conn->sock); rc = poll(fds, 2, POLLWAIT); if (rc == -1 && errno == EINTR) { //ISTGT_ERRLOG("EINTR poll\n"); continue; } if (rc == -1) { ISTGT_ERRLOG("poll() failed\n"); break; } if (rc == 0) { /* no fds */ //ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "poll TIMEOUT\n"); if (nopin_timer > 0) { nopin_timer -= POLLWAIT; if (nopin_timer <= 0) { nopin_timer = conn->nopininterval; rc = istgt_iscsi_send_nopin(conn); if (rc < 0) { ISTGT_ERRLOG("iscsi_send_nopin() failed\n"); break; } } } continue; } nopin_timer = conn->nopininterval; #endif /* ISTGT_USE_KQUEUE */ /* on socket */ #ifdef ISTGT_USE_KQUEUE if (kev.ident == (uintptr_t)conn->sock) { if (kev.flags & (EV_EOF|EV_ERROR)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "kevent EOF/ERROR\n"); break; } #else if (fds[0].revents & POLLHUP) { break; } if (fds[0].revents & POLLIN) { #endif /* ISTGT_USE_KQUEUE */ conn->pdu.copy_pdu = 0; rc = istgt_iscsi_read_pdu(conn, &conn->pdu); if (rc < 0) { if (conn->state != CONN_STATE_EXITING) { ISTGT_ERRLOG("conn->state = %d\n", conn->state); } if (conn->state != CONN_STATE_RUNNING) { if (errno == EINPROGRESS) { sleep(1); continue; } if (errno == ECONNRESET || errno == ETIMEDOUT) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "iscsi_read_pdu() RESET/TIMEOUT\n"); } else { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "iscsi_read_pdu() EOF\n"); } break; } ISTGT_ERRLOG("iscsi_read_pdu() failed\n"); break; } execute_pdu: opcode = BGET8W(&conn->pdu.bhs.opcode, 5, 6); #if 0 pthread_testcancel(); #endif if (conn->state != CONN_STATE_RUNNING) { break; } if (g_trace_flag) { if (conn->sess != NULL) { SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "isid=%"PRIx64", tsih=%u, cid=%u, op=%x\n", conn->sess->isid, conn->sess->tsih, conn->cid, opcode); SESS_MTX_UNLOCK(conn); } else { ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "isid=xxx, tsih=xxx, cid=%u, op=%x\n", conn->cid, opcode); } } rc = istgt_iscsi_execute(conn, &conn->pdu); if (rc < 0) { ISTGT_ERRLOG("iscsi_execute() failed on %s(%s)\n", conn->target_port, conn->initiator_port); break; } if (g_trace_flag) { if (conn->sess != NULL) { SESS_MTX_LOCK(conn); ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "isid=%"PRIx64", tsih=%u, cid=%u, op=%x complete\n", conn->sess->isid, conn->sess->tsih, conn->cid, opcode); SESS_MTX_UNLOCK(conn); } else { ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "isid=xxx, tsih=xxx, cid=%u, op=%x complete\n", conn->cid, opcode); } } if (opcode == ISCSI_OP_LOGOUT) { ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "logout received\n"); break; } if (conn->pdu.copy_pdu == 0) { xfree(conn->pdu.ahs); conn->pdu.ahs = NULL; if (conn->pdu.data != conn->pdu.shortdata) { xfree(conn->pdu.data); } conn->pdu.data = NULL; } /* execute pending PDUs */ pdu = istgt_queue_dequeue(&conn->pending_pdus); if (pdu != NULL) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "execute pending PDU\n"); rc = istgt_iscsi_copy_pdu(&conn->pdu, pdu); conn->pdu.copy_pdu = 0; xfree(pdu); goto execute_pdu; } #if 0 /* retry read/PDUs */ continue; #endif } /* execute on task queue */ #ifdef ISTGT_USE_KQUEUE if (kev.ident == (uintptr_t)conn->task_pipe[0]) { if (kev.flags & (EV_EOF|EV_ERROR)) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "kevent EOF/ERROR\n"); break; } #else if (fds[1].revents & POLLHUP) { break; } if (fds[1].revents & POLLIN) { #endif /* ISTGT_USE_KQUEUE */ char tmp[1]; //ISTGT_TRACELOG(ISTGT_TRACE_SCSI, "Queue Task START\n"); rc = read(conn->task_pipe[0], tmp, 1); if (rc < 0 || rc == 0 || rc != 1) { ISTGT_ERRLOG("read() failed\n"); break; } if (tmp[0] == 'E') { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "exit request (%d)\n", conn->id); break; } /* DATA-IN/OUT */ MTX_LOCK(&conn->task_queue_mutex); rc = istgt_queue_count(&conn->task_queue); lu_task = istgt_queue_dequeue(&conn->task_queue); MTX_UNLOCK(&conn->task_queue_mutex); if (lu_task != NULL) { if (conn->exec_lu_task != NULL) { ISTGT_ERRLOG("task is overlapped (CmdSN=%u, %u)\n", conn->exec_lu_task->lu_cmd.CmdSN, lu_task->lu_cmd.CmdSN); break; } conn->exec_lu_task = lu_task; if (lu_task->lu_cmd.W_bit) { /* write */ if (lu_task->req_transfer_out == 0) { if (lu_task->req_execute) { if (conn->running_tasks > 0) { conn->running_tasks--; } else { ISTGT_ERRLOG("running no task\n"); } } rc = istgt_iscsi_task_response(conn, lu_task); if (rc < 0) { lu_task->error = 1; ISTGT_ERRLOG("iscsi_task_response() failed on %s(%s)\n", conn->target_port, conn->initiator_port); break; } rc = istgt_lu_destroy_task(lu_task); if (rc < 0) { ISTGT_ERRLOG("lu_destroy_task() failed\n"); break; } lu_task = NULL; conn->exec_lu_task = NULL; } else { //ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, // "Task Write Trans START\n"); rc = istgt_iscsi_task_transfer_out(conn, lu_task); if (rc < 0) { lu_task->error = 1; ISTGT_ERRLOG("iscsi_task_transfer_out() failed on %s(%s)\n", conn->target_port, conn->initiator_port); break; } //ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, // "Task Write Trans END\n"); MTX_LOCK(&lu_task->trans_mutex); lu_task->req_transfer_out = 0; /* need response after execution */ lu_task->req_execute = 1; if (conn->use_sender == 0) { conn->running_tasks++; } rc = pthread_cond_broadcast(&lu_task->trans_cond); MTX_UNLOCK(&lu_task->trans_mutex); if (rc != 0) { ISTGT_ERRLOG("cond_broadcast() failed\n"); break; } lu_task = NULL; conn->exec_lu_task = NULL; } } else { /* read or no data */ rc = istgt_iscsi_task_response(conn, lu_task); if (rc < 0) { lu_task->error = 1; ISTGT_ERRLOG("iscsi_task_response() failed on %s(%s)\n", conn->target_port, conn->initiator_port); break; } rc = istgt_lu_destroy_task(lu_task); if (rc < 0) { ISTGT_ERRLOG("lu_destroy_task() failed\n"); break; } lu_task = NULL; conn->exec_lu_task = NULL; } } /* XXX PDUs in DATA-OUT? */ pdu = istgt_queue_dequeue(&conn->pending_pdus); if (pdu != NULL) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "pending in task\n"); rc = istgt_iscsi_copy_pdu(&conn->pdu, pdu); conn->pdu.copy_pdu = 0; xfree(pdu); #ifdef ISTGT_USE_KQUEUE kev.ident = -1; #else fds[1].revents &= ~POLLIN; #endif /* ISTGT_USE_KQUEUE */ goto execute_pdu; } } } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "loop ended (%d)\n", conn->id); cleanup_exit: ; pthread_cleanup_pop(0); conn->state = CONN_STATE_EXITING; if (conn->sess != NULL) { SESS_MTX_LOCK(conn); lu = conn->sess->lu; if (lu != NULL && lu->queue_depth != 0) { rc = istgt_lu_clear_task_IT(conn, lu); if (rc < 0) { ISTGT_ERRLOG("lu_clear_task_IT() failed\n"); } istgt_clear_all_transfer_task(conn); } SESS_MTX_UNLOCK(conn); } if (conn->pdu.copy_pdu == 0) { xfree(conn->pdu.ahs); conn->pdu.ahs = NULL; if (conn->pdu.data != conn->pdu.shortdata) { xfree(conn->pdu.data); } conn->pdu.data = NULL; } wait_all_task(conn); if (conn->use_sender) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "stop sender thread (%d)\n", conn->id); /* stop sender thread */ MTX_LOCK(&conn->result_queue_mutex); rc = pthread_cond_broadcast(&conn->result_queue_cond); MTX_UNLOCK(&conn->result_queue_mutex); if (rc != 0) { ISTGT_ERRLOG("cond_broadcast() failed\n"); /* ignore errors */ } rc = pthread_join(conn->sender_thread, NULL); if (rc != 0) { ISTGT_ERRLOG("pthread_join() failed\n"); /* ignore errors */ } } close(conn->sock); #ifdef ISTGT_USE_KQUEUE close(kq); conn->kq = -1; #endif /* ISTGT_USE_KQUEUE */ sleep(1); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "worker %d end\n", conn->id); /* cleanup conn & sess */ ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cleanup LOCK\n"); MTX_LOCK(&g_conns_mutex); g_conns[conn->id] = NULL; istgt_remove_conn(conn); MTX_UNLOCK(&g_conns_mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cleanup UNLOCK\n"); return NULL; } int istgt_create_conn(ISTGT_Ptr istgt, PORTAL_Ptr portal, int sock, struct sockaddr *sa, socklen_t salen __attribute__((__unused__))) { char buf[MAX_TMPBUF]; CONN_Ptr conn; int rc; int i; conn = xmalloc(sizeof *conn); memset(conn, 0, sizeof *conn); conn->istgt = istgt; MTX_LOCK(&istgt->mutex); conn->timeout = istgt->timeout; conn->nopininterval = istgt->nopininterval; conn->nopininterval *= 1000; /* sec. to msec. */ conn->max_r2t = istgt->maxr2t; conn->TargetMaxRecvDataSegmentLength = istgt->MaxRecvDataSegmentLength; MTX_UNLOCK(&istgt->mutex); conn->MaxRecvDataSegmentLength = 8192; // RFC3720(12.12) if (conn->TargetMaxRecvDataSegmentLength < conn->MaxRecvDataSegmentLength) { conn->TargetMaxRecvDataSegmentLength = conn->MaxRecvDataSegmentLength; } conn->MaxOutstandingR2T = 1; conn->FirstBurstLength = DEFAULT_FIRSTBURSTLENGTH; conn->MaxBurstLength = DEFAULT_MAXBURSTLENGTH; conn->portal.label = xstrdup(portal->label); conn->portal.host = xstrdup(portal->host); conn->portal.port = xstrdup(portal->port); conn->portal.idx = portal->idx; conn->portal.tag = portal->tag; conn->portal.sock = -1; conn->sock = sock; conn->wsock = -1; #ifdef ISTGT_USE_KQUEUE conn->kq = -1; #endif /* ISTGT_USE_KQUEUE */ conn->use_sender = 0; conn->sess = NULL; conn->params = NULL; conn->state = CONN_STATE_INVALID; conn->exec_logout = 0; conn->max_pending = 0; conn->queue_depth = 0; conn->pending_r2t = 0; conn->header_digest = 0; conn->data_digest = 0; conn->full_feature = 0; conn->login_phase = ISCSI_LOGIN_PHASE_NONE; conn->auth.user = NULL; conn->auth.secret = NULL; conn->auth.muser = NULL; conn->auth.msecret = NULL; conn->authenticated = 0; conn->req_auth = 0; conn->req_mutual = 0; istgt_queue_init(&conn->pending_pdus); conn->r2t_tasks = xmalloc (sizeof *conn->r2t_tasks * (conn->max_r2t + 1)); for (i = 0; i < (conn->max_r2t + 1); i++) { conn->r2t_tasks[i] = NULL; } conn->task_pipe[0] = -1; conn->task_pipe[1] = -1; conn->max_task_queue = MAX_LU_QUEUE_DEPTH; istgt_queue_init(&conn->task_queue); istgt_queue_init(&conn->result_queue); conn->exec_lu_task = NULL; conn->running_tasks = 0; memset(conn->initiator_addr, 0, sizeof conn->initiator_addr); memset(conn->target_addr, 0, sizeof conn->target_addr); switch (sa->sa_family) { case AF_INET6: conn->initiator_family = AF_INET6; rc = istgt_getaddr(sock, conn->target_addr, sizeof conn->target_addr, conn->initiator_addr, sizeof conn->initiator_addr); if (rc < 0) { ISTGT_ERRLOG("istgt_getaddr() failed\n"); goto error_return; } break; case AF_INET: conn->initiator_family = AF_INET; rc = istgt_getaddr(sock, conn->target_addr, sizeof conn->target_addr, conn->initiator_addr, sizeof conn->initiator_addr); if (rc < 0) { ISTGT_ERRLOG("istgt_getaddr() failed\n"); goto error_return; } break; default: ISTGT_ERRLOG("unsupported family\n"); goto error_return; } printf("sock=%d, addr=%s, peer=%s\n", sock, conn->target_addr, conn->initiator_addr); /* wildcard? */ if (strcasecmp(conn->portal.host, "[::]") == 0 || strcasecmp(conn->portal.host, "[*]") == 0) { if (conn->initiator_family != AF_INET6) { ISTGT_ERRLOG("address family error\n"); goto error_return; } snprintf(buf, sizeof buf, "[%s]", conn->target_addr); xfree(conn->portal.host); conn->portal.host = xstrdup(buf); } else if (strcasecmp(conn->portal.host, "0.0.0.0") == 0 || strcasecmp(conn->portal.host, "*") == 0) { if (conn->initiator_family != AF_INET) { ISTGT_ERRLOG("address family error\n"); goto error_return; } snprintf(buf, sizeof buf, "%s", conn->target_addr); xfree(conn->portal.host); conn->portal.host = xstrdup(buf); } memset(conn->initiator_name, 0, sizeof conn->initiator_name); memset(conn->target_name, 0, sizeof conn->target_name); memset(conn->initiator_port, 0, sizeof conn->initiator_port); memset(conn->target_port, 0, sizeof conn->target_port); /* set timeout msec. */ rc = istgt_set_recvtimeout(conn->sock, conn->timeout * 1000); if (rc != 0) { ISTGT_ERRLOG("istgt_set_recvtimeo() failed\n"); goto error_return; } rc = istgt_set_sendtimeout(conn->sock, conn->timeout * 1000); if (rc != 0) { ISTGT_ERRLOG("istgt_set_sendtimeo() failed\n"); goto error_return; } #if defined (ISTGT_USE_IOVEC) /* set low water mark */ rc = istgt_set_recvlowat(conn->sock, ISCSI_BHS_LEN); if (rc != 0) { ISTGT_ERRLOG("istgt_set_recvlowat() failed\n"); goto error_return; } #endif rc = pipe(conn->task_pipe); if (rc != 0) { ISTGT_ERRLOG("pipe() failed\n"); conn->task_pipe[0] = -1; conn->task_pipe[1] = -1; goto error_return; } rc = pthread_mutex_init(&conn->task_queue_mutex, &istgt->mutex_attr); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); goto error_return; } rc = pthread_mutex_init(&conn->result_queue_mutex, &istgt->mutex_attr); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); goto error_return; } rc = pthread_cond_init(&conn->result_queue_cond, NULL); if (rc != 0) { ISTGT_ERRLOG("cond_init() failed\n"); goto error_return; } rc = pthread_mutex_init(&conn->wpdu_mutex, NULL); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); goto error_return; } rc = pthread_cond_init(&conn->wpdu_cond, NULL); if (rc != 0) { ISTGT_ERRLOG("cond_init() failed\n"); goto error_return; } rc = pthread_mutex_init(&conn->r2t_mutex, &istgt->mutex_attr); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); goto error_return; } rc = pthread_mutex_init(&conn->sender_mutex, NULL); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); goto error_return; } rc = pthread_cond_init(&conn->sender_cond, NULL); if (rc != 0) { ISTGT_ERRLOG("cond_init() failed\n"); goto error_return; } /* set default params */ rc = istgt_iscsi_conn_params_init(&conn->params); if (rc < 0) { ISTGT_ERRLOG("iscsi_conn_params_init() failed\n"); goto error_return; } /* replace with config value */ rc = istgt_iscsi_param_set_int(conn->params, "MaxRecvDataSegmentLength", conn->MaxRecvDataSegmentLength); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } conn->shortpdusize = ISTGT_SHORTPDUSIZE; conn->shortpdu = xmalloc(conn->shortpdusize); conn->iobufsize = ISTGT_IOBUFSIZE; conn->iobuf = xmalloc(conn->iobufsize); conn->snsbufsize = ISTGT_SNSBUFSIZE; conn->snsbuf = xmalloc(conn->snsbufsize); if (conn->MaxRecvDataSegmentLength < 8192) { conn->recvbufsize = 8192; conn->sendbufsize = 8192; } else { conn->recvbufsize = conn->MaxRecvDataSegmentLength; conn->sendbufsize = conn->MaxRecvDataSegmentLength; } conn->recvbuf = xmalloc(conn->recvbufsize); conn->sendbuf = xmalloc(conn->sendbufsize); conn->worksize = 0; conn->workbuf = NULL; /* register global */ rc = -1; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "register global LOCK\n"); MTX_LOCK(&g_conns_mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "register global LOCKED\n"); for (i = 0; i < g_nconns; i++) { if (g_conns[i] == NULL) { g_conns[i] = conn; conn->id = i; rc = 0; break; } } MTX_UNLOCK(&g_conns_mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "register global UNLOCK\n"); if (rc < 0) { ISTGT_ERRLOG("no free conn slot available\n"); error_return: if (conn->task_pipe[0] != -1) close(conn->task_pipe[0]); if (conn->task_pipe[1] != -1) close(conn->task_pipe[1]); istgt_iscsi_param_free(conn->params); istgt_queue_destroy(&conn->pending_pdus); istgt_queue_destroy(&conn->task_queue); istgt_queue_destroy(&conn->result_queue); xfree(conn->portal.label); xfree(conn->portal.host); xfree(conn->portal.port); xfree(conn->iobuf); xfree(conn->snsbuf); xfree(conn->recvbuf); xfree(conn->sendbuf); xfree(conn); return -1; } /* create new thread */ #ifdef ISTGT_STACKSIZE rc = pthread_create(&conn->thread, &istgt->attr, &worker, (void *)conn); #else rc = pthread_create(&conn->thread, NULL, &worker, (void *)conn); #endif /* ISTGT_STACKSIZE */ if (rc != 0) { ISTGT_ERRLOG("pthread_create() failed\n"); goto error_return; } rc = pthread_detach(conn->thread); if (rc != 0) { ISTGT_ERRLOG("pthread_detach() failed\n"); goto error_return; } #ifdef HAVE_PTHREAD_SET_NAME_NP snprintf(buf, sizeof buf, "connthread #%d", conn->id); pthread_set_name_np(conn->thread, buf); #endif return 0; } int istgt_create_sess(ISTGT_Ptr istgt, CONN_Ptr conn, ISTGT_LU_Ptr lu) { SESS_Ptr sess; int rc; sess = xmalloc(sizeof *sess); memset(sess, 0, sizeof *sess); /* configuration values */ MTX_LOCK(&istgt->mutex); if (lu != NULL) { MTX_LOCK(&lu->mutex); } sess->MaxConnections = istgt->MaxConnections; if (lu != NULL) { sess->MaxOutstandingR2T = lu->MaxOutstandingR2T; } else { sess->MaxOutstandingR2T = istgt->MaxOutstandingR2T; } #if 0 if (sess->MaxOutstandingR2T > conn->max_r2t) { if (conn->max_r2t > 0) { sess->MaxOutstandingR2T = conn->max_r2t; } else { sess->MaxOutstandingR2T = 1; } } #else if (sess->MaxOutstandingR2T < 1) { sess->MaxOutstandingR2T = 1; } /* limit up to MaxOutstandingR2T */ if (sess->MaxOutstandingR2T < conn->max_r2t) { conn->max_r2t = sess->MaxOutstandingR2T; } #endif if (lu != NULL) { sess->DefaultTime2Wait = lu->DefaultTime2Wait; sess->DefaultTime2Retain = lu->DefaultTime2Retain; sess->FirstBurstLength = lu->FirstBurstLength; sess->MaxBurstLength = lu->MaxBurstLength; conn->MaxRecvDataSegmentLength = lu->MaxRecvDataSegmentLength; sess->InitialR2T = lu->InitialR2T; sess->ImmediateData = lu->ImmediateData; sess->DataPDUInOrder = lu->DataPDUInOrder; sess->DataSequenceInOrder = lu->DataSequenceInOrder; sess->ErrorRecoveryLevel = lu->ErrorRecoveryLevel; } else { sess->DefaultTime2Wait = istgt->DefaultTime2Wait; sess->DefaultTime2Retain = istgt->DefaultTime2Retain; sess->FirstBurstLength = istgt->FirstBurstLength; sess->MaxBurstLength = istgt->MaxBurstLength; conn->MaxRecvDataSegmentLength = istgt->MaxRecvDataSegmentLength; sess->InitialR2T = istgt->InitialR2T; sess->ImmediateData = istgt->ImmediateData; sess->DataPDUInOrder = istgt->DataPDUInOrder; sess->DataSequenceInOrder = istgt->DataSequenceInOrder; sess->ErrorRecoveryLevel = istgt->ErrorRecoveryLevel; } if (lu != NULL) { MTX_UNLOCK(&lu->mutex); } MTX_UNLOCK(&istgt->mutex); sess->initiator_port = xstrdup(conn->initiator_port); sess->target_name = xstrdup(conn->target_name); sess->tag = conn->portal.tag; sess->max_conns = sess->MaxConnections; sess->conns = xmalloc(sizeof *sess->conns * sess->max_conns); memset(sess->conns, 0, sizeof *sess->conns * sess->max_conns); sess->connections = 0; sess->conns[sess->connections] = conn; sess->connections++; sess->req_mcs_cond = 0; sess->params = NULL; sess->lu = NULL; sess->isid = 0; sess->tsih = 0; sess->initial_r2t = 0; sess->immediate_data = 0; rc = pthread_mutex_init(&sess->mutex, NULL); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); error_return: istgt_iscsi_param_free(sess->params); xfree(sess->initiator_port); xfree(sess->target_name); xfree(sess->conns); xfree(sess); conn->sess = NULL; return -1; } rc = pthread_cond_init(&sess->mcs_cond, NULL); if (rc != 0) { ISTGT_ERRLOG("cond_init() failed\n"); goto error_return; } /* set default params */ rc = istgt_iscsi_sess_params_init(&sess->params); if (rc < 0) { ISTGT_ERRLOG("iscsi_sess_params_init() failed\n"); goto error_return; } /* replace with config value */ rc = istgt_iscsi_param_set_int(sess->params, "MaxConnections", sess->MaxConnections); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } rc = istgt_iscsi_param_set_int(sess->params, "MaxOutstandingR2T", sess->MaxOutstandingR2T); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } rc = istgt_iscsi_param_set_int(sess->params, "DefaultTime2Wait", sess->DefaultTime2Wait); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } rc = istgt_iscsi_param_set_int(sess->params, "DefaultTime2Retain", sess->DefaultTime2Retain); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } rc = istgt_iscsi_param_set_int(sess->params, "FirstBurstLength", sess->FirstBurstLength); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } rc = istgt_iscsi_param_set_int(sess->params, "MaxBurstLength", sess->MaxBurstLength); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } rc = istgt_iscsi_param_set(sess->params, "InitialR2T", sess->InitialR2T ? "Yes" : "No"); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } rc = istgt_iscsi_param_set(sess->params, "ImmediateData", sess->ImmediateData ? "Yes" : "No"); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } rc = istgt_iscsi_param_set(sess->params, "DataPDUInOrder", sess->DataPDUInOrder ? "Yes" : "No"); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } rc = istgt_iscsi_param_set(sess->params, "DataSequenceInOrder", sess->DataSequenceInOrder ? "Yes" : "No"); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set() failed\n"); goto error_return; } rc = istgt_iscsi_param_set_int(sess->params, "ErrorRecoveryLevel", sess->ErrorRecoveryLevel); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } /* realloc buffer */ rc = istgt_iscsi_param_set_int(conn->params, "MaxRecvDataSegmentLength", conn->MaxRecvDataSegmentLength); if (rc < 0) { ISTGT_ERRLOG("iscsi_param_set_int() failed\n"); goto error_return; } if (conn->MaxRecvDataSegmentLength != conn->recvbufsize) { xfree(conn->recvbuf); xfree(conn->sendbuf); if (conn->MaxRecvDataSegmentLength < 8192) { conn->recvbufsize = 8192; conn->sendbufsize = 8192; } else { conn->recvbufsize = conn->MaxRecvDataSegmentLength; conn->sendbufsize = conn->MaxRecvDataSegmentLength; } conn->recvbuf = xmalloc(conn->recvbufsize); conn->sendbuf = xmalloc(conn->sendbufsize); } /* sess for first connection of session */ conn->sess = sess; return 0; } static int istgt_append_sess(CONN_Ptr conn, uint64_t isid, uint16_t tsih, uint16_t cid) { SESS_Ptr sess; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_ISCSI, "append session: isid=%"PRIx64", tsih=%u, cid=%u\n", isid, tsih, cid); sess = NULL; rc = -1; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { if (g_conns[i] == NULL || g_conns[i]->sess == NULL) continue; sess = g_conns[i]->sess; MTX_LOCK(&sess->mutex); if (conn->portal.tag == sess->tag && strcasecmp(conn->initiator_port, sess->initiator_port) == 0 && strcasecmp(conn->target_name, sess->target_name) == 0 && (isid == sess->isid && tsih == sess->tsih)) { /* match tag and initiator port and target */ rc = 0; break; } MTX_UNLOCK(&sess->mutex); } if (rc < 0) { /* no match */ MTX_UNLOCK(&g_conns_mutex); ISTGT_ERRLOG("no MCS session for isid=%"PRIx64", tsih=%d, cid=%d\n", isid, tsih, cid); return -1; } /* sess is LOCK by loop */ if (sess->connections >= sess->max_conns || sess->connections >= sess->MaxConnections) { /* no slot for connection */ MTX_UNLOCK(&sess->mutex); MTX_UNLOCK(&g_conns_mutex); ISTGT_ERRLOG("too many connections for isid=%"PRIx64 ", tsih=%d, cid=%d\n", isid, tsih, cid); return -1; } printf("Connections(tsih %d): %d\n", sess->tsih, sess->connections); conn->sess = sess; sess->conns[sess->connections] = conn; sess->connections++; MTX_UNLOCK(&sess->mutex); MTX_UNLOCK(&g_conns_mutex); return 0; } static void istgt_free_sess(SESS_Ptr sess) { if (sess == NULL) return; (void) pthread_mutex_destroy(&sess->mutex); (void) pthread_cond_destroy(&sess->mcs_cond); istgt_iscsi_param_free(sess->params); xfree(sess->initiator_port); xfree(sess->target_name); xfree(sess->conns); xfree(sess); } static void istgt_free_conn(CONN_Ptr conn) { if (conn == NULL) return; if (conn->task_pipe[0] != -1) close(conn->task_pipe[0]); if (conn->task_pipe[1] != -1) close(conn->task_pipe[1]); (void) pthread_mutex_destroy(&conn->task_queue_mutex); (void) pthread_mutex_destroy(&conn->result_queue_mutex); (void) pthread_cond_destroy(&conn->result_queue_cond); (void) pthread_mutex_destroy(&conn->wpdu_mutex); (void) pthread_cond_destroy(&conn->wpdu_cond); (void) pthread_mutex_destroy(&conn->r2t_mutex); (void) pthread_mutex_destroy(&conn->sender_mutex); (void) pthread_cond_destroy(&conn->sender_cond); istgt_iscsi_param_free(conn->params); istgt_queue_destroy(&conn->pending_pdus); istgt_queue_destroy(&conn->task_queue); istgt_queue_destroy(&conn->result_queue); xfree(conn->r2t_tasks); xfree(conn->portal.label); xfree(conn->portal.host); xfree(conn->portal.port); xfree(conn->auth.user); xfree(conn->auth.secret); xfree(conn->auth.muser); xfree(conn->auth.msecret); xfree(conn->shortpdu); xfree(conn->iobuf); xfree(conn->snsbuf); xfree(conn->recvbuf); xfree(conn->sendbuf); xfree(conn->workbuf); xfree(conn); } static void istgt_remove_conn(CONN_Ptr conn) { SESS_Ptr sess; int idx; int i, j; idx = -1; sess = conn->sess; conn->sess = NULL; if (sess == NULL) { istgt_free_conn(conn); return; } MTX_LOCK(&sess->mutex); for (i = 0; i < sess->connections; i++) { if (sess->conns[i] == conn) { idx = i; break; } } if (sess->connections < 1) { ISTGT_ERRLOG("zero connection\n"); sess->connections = 0; } else { if (idx < 0) { ISTGT_ERRLOG("remove conn not found\n"); } else { for (j = idx; j < sess->connections - 1; j++) { sess->conns[j] = sess->conns[j + 1]; } sess->conns[sess->connections - 1] = NULL; } sess->connections--; } printf("Connections(tsih %d): %d\n", sess->tsih, sess->connections); if (sess->connections == 1) { /* cleanup for multiple connecsions */ MTX_UNLOCK(&sess->mutex); } else if (sess->connections == 0) { /* cleanup last connection */ MTX_UNLOCK(&sess->mutex); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cleanup last conn free tsih\n"); istgt_lu_free_tsih(sess->lu, sess->tsih, conn->initiator_port); ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cleanup last conn free sess\n"); istgt_free_sess(sess); } else { MTX_UNLOCK(&sess->mutex); } ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "cleanup free conn\n"); istgt_free_conn(conn); } static int istgt_iscsi_drop_all_conns(CONN_Ptr conn) { CONN_Ptr xconn; int max_conns; int num; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "istgt_iscsi_drop_all_conns\n"); printf("drop all connections %s by %s\n", conn->target_name, conn->initiator_name); MTX_LOCK(&conn->istgt->mutex); max_conns = conn->istgt->MaxConnections; MTX_UNLOCK(&conn->istgt->mutex); num = 0; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { xconn = g_conns[i]; if (xconn == NULL) continue; if (xconn == conn) continue; if (strcasecmp(conn->initiator_name, xconn->initiator_name) != 0) { continue; } if (strcasecmp(conn->target_name, xconn->target_name) == 0) { if (xconn->sess != NULL) { printf("exiting conn by %s(%s), TSIH=%u, CID=%u\n", xconn->initiator_name, xconn->initiator_addr, xconn->sess->tsih, xconn->cid); } else { printf("exiting conn by %s(%s), TSIH=xx, CID=%u\n", xconn->initiator_name, xconn->initiator_addr, xconn->cid); } xconn->state = CONN_STATE_EXITING; num++; } } istgt_yield(); sleep(1); if (num > max_conns + 1) { printf("try pthread_cancel\n"); for (i = 0; i < g_nconns; i++) { xconn = g_conns[i]; if (xconn == NULL) continue; if (xconn == conn) continue; if (strcasecmp(conn->initiator_port, xconn->initiator_port) != 0) { continue; } if (strcasecmp(conn->target_name, xconn->target_name) == 0) { if (xconn->sess != NULL) { printf("exiting conn by %s(%s), TSIH=%u, CID=%u\n", xconn->initiator_port, xconn->initiator_addr, xconn->sess->tsih, xconn->cid); } else { printf("exiting conn by %s(%s), TSIH=xx, CID=%u\n", xconn->initiator_port, xconn->initiator_addr, xconn->cid); } rc = pthread_cancel(xconn->thread); if (rc != 0) { ISTGT_ERRLOG("pthread_cancel() failed rc=%d\n", rc); } } } } MTX_UNLOCK(&g_conns_mutex); if (num != 0) { printf("exiting %d conns\n", num); } return 0; } static int istgt_iscsi_drop_old_conns(CONN_Ptr conn) { CONN_Ptr xconn; int max_conns; int num; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "istgt_iscsi_drop_old_conns\n"); printf("drop old connections %s by %s\n", conn->target_name, conn->initiator_port); MTX_LOCK(&conn->istgt->mutex); max_conns = conn->istgt->MaxConnections; MTX_UNLOCK(&conn->istgt->mutex); num = 0; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { xconn = g_conns[i]; if (xconn == NULL) continue; if (xconn == conn) continue; if (strcasecmp(conn->initiator_port, xconn->initiator_port) != 0) { continue; } if (strcasecmp(conn->target_name, xconn->target_name) == 0) { if (xconn->sess != NULL) { printf("exiting conn by %s(%s), TSIH=%u, CID=%u\n", xconn->initiator_port, xconn->initiator_addr, xconn->sess->tsih, xconn->cid); } else { printf("exiting conn by %s(%s), TSIH=xx, CID=%u\n", xconn->initiator_port, xconn->initiator_addr, xconn->cid); } xconn->state = CONN_STATE_EXITING; num++; } } istgt_yield(); sleep(1); if (num > max_conns + 1) { printf("try pthread_cancel\n"); for (i = 0; i < g_nconns; i++) { xconn = g_conns[i]; if (xconn == NULL) continue; if (xconn == conn) continue; if (strcasecmp(conn->initiator_port, xconn->initiator_port) != 0) { continue; } if (strcasecmp(conn->target_name, xconn->target_name) == 0) { if (xconn->sess != NULL) { printf("exiting conn by %s(%s), TSIH=%u, CID=%u\n", xconn->initiator_port, xconn->initiator_addr, xconn->sess->tsih, xconn->cid); } else { printf("exiting conn by %s(%s), TSIH=xx, CID=%u\n", xconn->initiator_port, xconn->initiator_addr, xconn->cid); } rc = pthread_cancel(xconn->thread); if (rc != 0) { ISTGT_ERRLOG("pthread_cancel() failed rc=%d\n", rc); } } } } MTX_UNLOCK(&g_conns_mutex); if (num != 0) { printf("exiting %d conns\n", num); } return 0; } void istgt_lock_gconns(void) { MTX_LOCK(&g_conns_mutex); } void istgt_unlock_gconns(void) { MTX_UNLOCK(&g_conns_mutex); } int istgt_get_gnconns(void) { return g_nconns; } CONN_Ptr istgt_get_gconn(int idx) { if (idx >= g_nconns) return NULL; return g_conns[idx]; } int istgt_get_active_conns(void) { CONN_Ptr conn; int num = 0; int i; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { conn = g_conns[i]; if (conn == NULL) continue; num++; } MTX_UNLOCK(&g_conns_mutex); return num; } int istgt_stop_conns(void) { CONN_Ptr conn; char tmp[1]; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "istgt_stop_conns\n"); tmp[0] = 'E'; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { conn = g_conns[i]; if (conn == NULL) continue; rc = write(conn->task_pipe[1], tmp, 1); if(rc < 0 || rc != 1) { ISTGT_ERRLOG("write() failed\n"); /* ignore error */ } } MTX_UNLOCK(&g_conns_mutex); return 0; } CONN_Ptr istgt_find_conn(const char *initiator_port, const char *target_name, uint16_t tsih) { CONN_Ptr conn; SESS_Ptr sess; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "initiator_port=%s, target=%s, TSIH=%u", initiator_port, target_name, tsih); sess = NULL; rc = -1; //MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { conn = g_conns[i]; if (conn == NULL || conn->sess == NULL) continue; sess = conn->sess; MTX_LOCK(&sess->mutex); if (strcasecmp(initiator_port, sess->initiator_port) == 0 && strcasecmp(target_name, sess->target_name) == 0 && (tsih == sess->tsih)) { /* match initiator port and target */ rc = 0; break; } MTX_UNLOCK(&sess->mutex); } if (rc < 0) { //MTX_UNLOCK(&g_conns_mutex); return NULL; } MTX_UNLOCK(&sess->mutex); //MTX_UNLOCK(&g_conns_mutex); return conn; } int istgt_iscsi_init(ISTGT_Ptr istgt) { CF_SECTION *sp; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "istgt_iscsi_init\n"); sp = istgt_find_cf_section(istgt->config, "Global"); if (sp == NULL) { ISTGT_ERRLOG("find_cf_section failed()\n"); return -1; } rc = pthread_mutex_init(&g_conns_mutex, NULL); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); return -1; } rc = pthread_mutex_init(&g_last_tsih_mutex, NULL); if (rc != 0) { ISTGT_ERRLOG("mutex_init() failed\n"); return -1; } g_nconns = MAX_LOGICAL_UNIT * istgt->MaxSessions * istgt->MaxConnections; g_nconns += MAX_LOGICAL_UNIT * istgt->MaxConnections; g_conns = xmalloc(sizeof *g_conns * g_nconns); for (i = 0; i < g_nconns; i++) { g_conns[i] = NULL; } g_last_tsih = 0; return 0; } int istgt_iscsi_shutdown(ISTGT_Ptr istgt __attribute__((__unused__))) { CONN_Ptr conn; int retry = 10; int num; int rc; int i; ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "istgt_iscsi_shutdown\n"); num = 0; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { conn = g_conns[i]; if (conn == NULL) continue; conn->state = CONN_STATE_EXITING; num++; } MTX_UNLOCK(&g_conns_mutex); if (num != 0) { /* check threads */ while (retry > 0) { ISTGT_TRACELOG(ISTGT_TRACE_DEBUG, "check thread retry=%d\n", retry); sleep(1); num = 0; MTX_LOCK(&g_conns_mutex); for (i = 0; i < g_nconns; i++) { conn = g_conns[i]; if (conn == NULL) continue; num++; } MTX_UNLOCK(&g_conns_mutex); if (num == 0) break; retry--; } } rc = pthread_mutex_destroy(&g_last_tsih_mutex); if (rc != 0) { ISTGT_ERRLOG("mutex_destroy() failed\n"); return -1; } rc = pthread_mutex_destroy(&g_conns_mutex); if (rc != 0) { ISTGT_ERRLOG("mutex_destroy() failed\n"); return -1; } if (num == 0) { xfree(g_conns); g_conns = NULL; } return 0; }