^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * iSCSI lib definitions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006 Red Hat, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2004 - 2006 Mike Christie
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004 - 2005 Dmitry Yusupov
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2004 - 2005 Alex Aizman
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef LIBISCSI_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define LIBISCSI_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kfifo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/refcount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <scsi/iscsi_proto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <scsi/iscsi_if.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <scsi/scsi_transport_iscsi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct scsi_transport_template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct scsi_host_template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct scsi_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct Scsi_Host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct scsi_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct scsi_cmnd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct iscsi_transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct iscsi_cls_session;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct iscsi_cls_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct iscsi_session;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct iscsi_nopin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define ISCSI_DEF_XMIT_CMDS_MAX 128 /* must be power of 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define ISCSI_MGMT_CMDS_MAX 15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define ISCSI_DEF_CMD_PER_LUN 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* Task Mgmt states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) TMF_INITIAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) TMF_QUEUED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) TMF_SUCCESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) TMF_FAILED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) TMF_TIMEDOUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) TMF_NOT_FOUND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define ISID_SIZE 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* Connection suspend "bit" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define ISCSI_SUSPEND_BIT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define ISCSI_ITT_MASK 0x1fff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define ISCSI_TOTAL_CMDS_MAX 4096
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* this must be a power of two greater than ISCSI_MGMT_CMDS_MAX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define ISCSI_TOTAL_CMDS_MIN 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define ISCSI_AGE_SHIFT 28
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define ISCSI_AGE_MASK 0xf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define ISCSI_ADDRESS_BUF_LEN 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* this is the maximum possible storage for AHSs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) ISCSI_MAX_AHS_SIZE = sizeof(struct iscsi_ecdb_ahdr) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) sizeof(struct iscsi_rlength_ahdr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ISCSI_DIGEST_SIZE = sizeof(__u32),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ISCSI_TASK_FREE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ISCSI_TASK_COMPLETED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ISCSI_TASK_PENDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ISCSI_TASK_RUNNING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ISCSI_TASK_ABRT_TMF, /* aborted due to TMF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) ISCSI_TASK_ABRT_SESS_RECOV, /* aborted due to session recovery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ISCSI_TASK_REQUEUE_SCSIQ, /* qcmd requeueing to scsi-ml */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct iscsi_r2t_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) __be32 ttt; /* copied from R2T */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) __be32 exp_statsn; /* copied from R2T */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) uint32_t data_length; /* copied from R2T */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) uint32_t data_offset; /* copied from R2T */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int data_count; /* DATA-Out payload progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int datasn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* LLDs should set/update these values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int sent; /* R2T sequence progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct iscsi_task {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * Because LLDs allocate their hdr differently, this is a pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * and length to that storage. It must be setup at session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * creation time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct iscsi_hdr *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned short hdr_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned short hdr_len; /* accumulated size of hdr used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* copied values in case we need to send tmfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) itt_t hdr_itt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __be32 cmdsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct scsi_lun lun;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int itt; /* this ITT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) unsigned imm_count; /* imm-data (bytes) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /* offset in unsolicited stream (bytes); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct iscsi_r2t_info unsol_r2t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) char *data; /* mgmt payload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) unsigned data_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct scsi_cmnd *sc; /* associated SCSI cmd*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct iscsi_conn *conn; /* used connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* data processing tracking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) unsigned long last_xfer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) unsigned long last_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) bool have_checked_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /* T10 protection information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) bool protected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* state set/tested under session->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) refcount_t refcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct list_head running; /* running cmd list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) void *dd_data; /* driver/transport data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* invalid scsi_task pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define INVALID_SCSI_TASK (struct iscsi_task *)-1l
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static inline int iscsi_task_has_unsol_data(struct iscsi_task *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return task->unsol_r2t.data_length > task->unsol_r2t.sent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static inline void* iscsi_next_hdr(struct iscsi_task *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return (void*)task->hdr + task->hdr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* Connection's states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ISCSI_CONN_INITIAL_STAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ISCSI_CONN_STARTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) ISCSI_CONN_STOPPED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) ISCSI_CONN_CLEANUP_WAIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct iscsi_conn {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct iscsi_cls_conn *cls_conn; /* ptr to class connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) void *dd_data; /* iscsi_transport data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct iscsi_session *session; /* parent session */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * conn_stop() flag: stop to recover, stop to terminate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int stop_stage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct timer_list transport_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) unsigned long last_recv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) unsigned long last_ping;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) int ping_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) int recv_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct iscsi_task *ping_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* iSCSI connection-wide sequencing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) uint32_t exp_statsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) uint32_t statsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* control data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) int id; /* CID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int c_stage; /* connection state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * Preallocated buffer for pdus that have data but do not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * originate from scsi-ml. We never have two pdus using the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * buffer at the same time. It is only allocated to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * the default max recv size because the pdus we support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * should always fit in this buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct iscsi_task *login_task; /* mtask used for login/text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct iscsi_task *task; /* xmit task in progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* xmit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) spinlock_t taskqueuelock; /* protects the next three lists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct list_head mgmtqueue; /* mgmt (control) xmit queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct list_head cmdqueue; /* data-path cmd queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct list_head requeue; /* tasks needing another run */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct work_struct xmitwork; /* per-conn. xmit workqueue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) unsigned long suspend_tx; /* suspend Tx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) unsigned long suspend_rx; /* suspend Rx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /* negotiated params */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) unsigned max_recv_dlength; /* initiator_max_recv_dsl*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) unsigned max_xmit_dlength; /* target_max_recv_dsl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int hdrdgst_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int datadgst_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) int ifmarker_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int ofmarker_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* values userspace uses to id a conn */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) int persistent_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) char *persistent_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) unsigned max_segment_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) unsigned tcp_xmit_wsf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) unsigned tcp_recv_wsf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) uint16_t keepalive_tmo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) uint16_t local_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) uint8_t tcp_timestamp_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) uint8_t tcp_nagle_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) uint8_t tcp_wsf_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) uint8_t tcp_timer_scale;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) uint8_t tcp_timestamp_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) uint8_t fragment_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) uint8_t ipv4_tos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) uint8_t ipv6_traffic_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) uint8_t ipv6_flow_label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) uint8_t is_fw_assigned_ipv6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) char *local_ipaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* MIB-statistics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) uint64_t txdata_octets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) uint64_t rxdata_octets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) uint32_t scsicmd_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) uint32_t dataout_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) uint32_t scsirsp_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) uint32_t datain_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) uint32_t r2t_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) uint32_t tmfcmd_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) int32_t tmfrsp_pdus_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /* custom statistics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) uint32_t eh_abort_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) uint32_t fmr_unalign_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct iscsi_pool {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct kfifo queue; /* FIFO Queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) void **pool; /* Pool of elements */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) int max; /* Max number of elements */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* Session's states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) ISCSI_STATE_FREE = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) ISCSI_STATE_LOGGED_IN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ISCSI_STATE_FAILED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) ISCSI_STATE_TERMINATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) ISCSI_STATE_IN_RECOVERY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) ISCSI_STATE_RECOVERY_FAILED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) ISCSI_STATE_LOGGING_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct iscsi_session {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct iscsi_cls_session *cls_session;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * Syncs up the scsi eh thread with the iscsi eh thread when sending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * task management functions. This must be taken before the session
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * and recv lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct mutex eh_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* abort */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) wait_queue_head_t ehwait; /* used in eh_abort() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct iscsi_tm tmhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct timer_list tmf_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) int tmf_state; /* see TMF_INITIAL, etc.*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /* iSCSI session-wide sequencing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) uint32_t cmdsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) uint32_t exp_cmdsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) uint32_t max_cmdsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* This tracks the reqs queued into the initiator */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) uint32_t queued_cmdsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /* configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) int abort_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int lu_reset_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) int tgt_reset_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) int initial_r2t_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) unsigned short max_r2t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) int imm_data_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) unsigned first_burst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) unsigned max_burst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) int time2wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int time2retain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) int pdu_inorder_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) int dataseq_inorder_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) int erl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) int fast_abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) int tpgt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) char *username;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) char *username_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) char *password;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) char *password_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) char *targetname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) char *targetalias;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) char *ifacename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) char *initiatorname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) char *boot_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) char *boot_nic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) char *boot_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) char *portal_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) char *discovery_parent_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) uint16_t discovery_parent_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) uint16_t def_taskmgmt_tmo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) uint16_t tsid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) uint8_t auto_snd_tgt_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) uint8_t discovery_sess;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) uint8_t chap_auth_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) uint8_t discovery_logout_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) uint8_t bidi_chap_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) uint8_t discovery_auth_optional;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) uint8_t isid[ISID_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /* control data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct iscsi_transport *tt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct Scsi_Host *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) struct iscsi_conn *leadconn; /* leading connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* Between the forward and the backward locks exists a strict locking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * hierarchy. The mutual exclusion zone protected by the forward lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * can enclose the mutual exclusion zone protected by the backward lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * but not vice versa.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) spinlock_t frwd_lock; /* protects session state, *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * cmdsn, queued_cmdsn *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * session resources: *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * - cmdpool kfifo_out , *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * - mgmtpool, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) spinlock_t back_lock; /* protects cmdsn_exp *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * cmdsn_max, *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * cmdpool kfifo_in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) int state; /* session state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int age; /* counts session re-opens */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) int scsi_cmds_max; /* max scsi commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) int cmds_max; /* size of cmds array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct iscsi_task **cmds; /* Original Cmds arr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) struct iscsi_pool cmdpool; /* PDU's pool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) void *dd_data; /* LLD private data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) ISCSI_HOST_SETUP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) ISCSI_HOST_REMOVED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct iscsi_host {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) char *initiatorname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /* hw address or netdev iscsi connection is bound to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) char *hwaddress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) char *netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) wait_queue_head_t session_removal_wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /* protects sessions and state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) int num_sessions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct workqueue_struct *workq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) char workq_name[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * scsi host template
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) extern int iscsi_eh_abort(struct scsi_cmnd *sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) extern int iscsi_eh_recover_target(struct scsi_cmnd *sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) extern int iscsi_eh_session_reset(struct scsi_cmnd *sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) extern int iscsi_eh_device_reset(struct scsi_cmnd *sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) extern int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) extern enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * iSCSI host helpers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) #define iscsi_host_priv(_shost) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) (shost_priv(_shost) + sizeof(struct iscsi_host))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) extern int iscsi_host_set_param(struct Scsi_Host *shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) enum iscsi_host_param param, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) extern int iscsi_host_get_param(struct Scsi_Host *shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) enum iscsi_host_param param, char *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) extern int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) extern struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) int dd_data_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) bool xmit_can_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) extern void iscsi_host_remove(struct Scsi_Host *shost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) extern void iscsi_host_free(struct Scsi_Host *shost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) extern int iscsi_target_alloc(struct scsi_target *starget);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * session management
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) extern struct iscsi_cls_session *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) iscsi_session_setup(struct iscsi_transport *, struct Scsi_Host *shost,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) uint16_t, int, int, uint32_t, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) extern void iscsi_session_teardown(struct iscsi_cls_session *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) extern int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) enum iscsi_param param, char *buf, int buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) extern int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) enum iscsi_param param, char *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) #define iscsi_session_printk(prefix, _sess, fmt, a...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) iscsi_cls_session_printk(prefix, _sess->cls_session, fmt, ##a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * connection management
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) int, uint32_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) extern void iscsi_conn_teardown(struct iscsi_cls_conn *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) extern int iscsi_conn_start(struct iscsi_cls_conn *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) extern void iscsi_session_failure(struct iscsi_session *session,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) enum iscsi_err err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) enum iscsi_param param, char *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) extern int iscsi_conn_get_addr_param(struct sockaddr_storage *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) enum iscsi_param param, char *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) extern void iscsi_suspend_tx(struct iscsi_conn *conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) extern void iscsi_suspend_queue(struct iscsi_conn *conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) extern void iscsi_conn_queue_work(struct iscsi_conn *conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) #define iscsi_conn_printk(prefix, _c, fmt, a...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) iscsi_cls_conn_printk(prefix, ((struct iscsi_conn *)_c)->cls_conn, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) fmt, ##a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * pdu and task processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) extern void iscsi_update_cmdsn(struct iscsi_session *, struct iscsi_nopin *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) extern void iscsi_prep_data_out_pdu(struct iscsi_task *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct iscsi_r2t_info *r2t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct iscsi_data *hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) char *, uint32_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) char *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) char *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) extern int iscsi_verify_itt(struct iscsi_conn *, itt_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) extern struct iscsi_task *iscsi_itt_to_ctask(struct iscsi_conn *, itt_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) extern struct iscsi_task *iscsi_itt_to_task(struct iscsi_conn *, itt_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) extern void iscsi_requeue_task(struct iscsi_task *task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) extern void iscsi_put_task(struct iscsi_task *task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) extern void __iscsi_put_task(struct iscsi_task *task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) extern void __iscsi_get_task(struct iscsi_task *task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) extern void iscsi_complete_scsi_task(struct iscsi_task *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) uint32_t exp_cmdsn, uint32_t max_cmdsn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) * generic helpers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) extern void iscsi_pool_free(struct iscsi_pool *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) extern int iscsi_pool_init(struct iscsi_pool *, int, void ***, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) extern int iscsi_switch_str_param(char **, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * inline functions to deal with padding.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) static inline unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) iscsi_padded(unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return (len + ISCSI_PAD_LEN - 1) & ~(ISCSI_PAD_LEN - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) static inline unsigned int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) iscsi_padding(unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) len &= (ISCSI_PAD_LEN - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) len = ISCSI_PAD_LEN - len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags