Commit 38a9a621 authored by James Bottomley's avatar James Bottomley

Merge HEAD from ../scsi-misc-2.6-old

parents 27d1097d e75d5176
...@@ -229,7 +229,7 @@ config SCSI_FC_ATTRS ...@@ -229,7 +229,7 @@ config SCSI_FC_ATTRS
config SCSI_ISCSI_ATTRS config SCSI_ISCSI_ATTRS
tristate "iSCSI Transport Attributes" tristate "iSCSI Transport Attributes"
depends on SCSI depends on SCSI && NET
help help
If you wish to export transport-specific information about If you wish to export transport-specific information about
each attached iSCSI device to sysfs, say Y. each attached iSCSI device to sysfs, say Y.
...@@ -247,6 +247,30 @@ endmenu ...@@ -247,6 +247,30 @@ endmenu
menu "SCSI low-level drivers" menu "SCSI low-level drivers"
depends on SCSI!=n depends on SCSI!=n
config ISCSI_TCP
tristate "iSCSI Initiator over TCP/IP"
depends on SCSI && INET
select CRYPTO
select CRYPTO_MD5
select CRYPTO_CRC32C
select SCSI_ISCSI_ATTRS
help
The iSCSI Driver provides a host with the ability to access storage
through an IP network. The driver uses the iSCSI protocol to transport
SCSI requests and responses over a TCP/IP network between the host
(the "initiator") and "targets". Architecturally, the iSCSI driver
combines with the host's TCP/IP stack, network drivers, and Network
Interface Card (NIC) to provide the same functions as a SCSI or a
Fibre Channel (FC) adapter driver with a Host Bus Adapter (HBA).
To compile this driver as a module, choose M here: the
module will be called iscsi_tcp.
The userspace component needed to initialize the driver, documentation,
and sample configuration files can be found here:
http://linux-iscsi.sf.net
config SGIWD93_SCSI config SGIWD93_SCSI
tristate "SGI WD93C93 SCSI Driver" tristate "SGI WD93C93 SCSI Driver"
depends on SGI_IP22 && SCSI depends on SGI_IP22 && SCSI
......
...@@ -33,6 +33,7 @@ obj-$(CONFIG_SCSI_FC_ATTRS) += scsi_transport_fc.o ...@@ -33,6 +33,7 @@ obj-$(CONFIG_SCSI_FC_ATTRS) += scsi_transport_fc.o
obj-$(CONFIG_SCSI_ISCSI_ATTRS) += scsi_transport_iscsi.o obj-$(CONFIG_SCSI_ISCSI_ATTRS) += scsi_transport_iscsi.o
obj-$(CONFIG_SCSI_SAS_ATTRS) += scsi_transport_sas.o obj-$(CONFIG_SCSI_SAS_ATTRS) += scsi_transport_sas.o
obj-$(CONFIG_ISCSI_TCP) += iscsi_tcp.o
obj-$(CONFIG_SCSI_AMIGA7XX) += amiga7xx.o 53c7xx.o obj-$(CONFIG_SCSI_AMIGA7XX) += amiga7xx.o 53c7xx.o
obj-$(CONFIG_A3000_SCSI) += a3000.o wd33c93.o obj-$(CONFIG_A3000_SCSI) += a3000.o wd33c93.o
obj-$(CONFIG_A2091_SCSI) += a2091.o wd33c93.o obj-$(CONFIG_A2091_SCSI) += a2091.o wd33c93.o
......
...@@ -608,17 +608,43 @@ static char *container_types[] = { ...@@ -608,17 +608,43 @@ static char *container_types[] = {
* files instead of in OS dependant driver source. * files instead of in OS dependant driver source.
*/ */
static void setinqstr(int devtype, void *data, int tindex) static void setinqstr(struct aac_dev *dev, void *data, int tindex)
{ {
struct scsi_inq *str; struct scsi_inq *str;
struct aac_driver_ident *mp;
mp = aac_get_driver_ident(devtype);
str = (struct scsi_inq *)(data); /* cast data to scsi inq block */ str = (struct scsi_inq *)(data); /* cast data to scsi inq block */
memset(str, ' ', sizeof(*str));
inqstrcpy (mp->vname, str->vid);
inqstrcpy (mp->model, str->pid); /* last six chars reserved for vol type */ if (dev->supplement_adapter_info.AdapterTypeText[0]) {
char * cp = dev->supplement_adapter_info.AdapterTypeText;
int c = sizeof(str->vid);
while (*cp && *cp != ' ' && --c)
++cp;
c = *cp;
*cp = '\0';
inqstrcpy (dev->supplement_adapter_info.AdapterTypeText,
str->vid);
*cp = c;
while (*cp && *cp != ' ')
++cp;
while (*cp == ' ')
++cp;
/* last six chars reserved for vol type */
c = 0;
if (strlen(cp) > sizeof(str->pid)) {
c = cp[sizeof(str->pid)];
cp[sizeof(str->pid)] = '\0';
}
inqstrcpy (cp, str->pid);
if (c)
cp[sizeof(str->pid)] = c;
} else {
struct aac_driver_ident *mp = aac_get_driver_ident(dev->cardtype);
inqstrcpy (mp->vname, str->vid);
/* last six chars reserved for vol type */
inqstrcpy (mp->model, str->pid);
}
if (tindex < (sizeof(container_types)/sizeof(char *))){ if (tindex < (sizeof(container_types)/sizeof(char *))){
char *findit = str->pid; char *findit = str->pid;
...@@ -627,7 +653,9 @@ static void setinqstr(int devtype, void *data, int tindex) ...@@ -627,7 +653,9 @@ static void setinqstr(int devtype, void *data, int tindex)
/* RAID is superfluous in the context of a RAID device */ /* RAID is superfluous in the context of a RAID device */
if (memcmp(findit-4, "RAID", 4) == 0) if (memcmp(findit-4, "RAID", 4) == 0)
*(findit -= 4) = ' '; *(findit -= 4) = ' ';
inqstrcpy (container_types[tindex], findit + 1); if (((findit - str->pid) + strlen(container_types[tindex]))
< (sizeof(str->pid) + sizeof(str->prl)))
inqstrcpy (container_types[tindex], findit + 1);
} }
inqstrcpy ("V1.0", str->prl); inqstrcpy ("V1.0", str->prl);
} }
...@@ -822,12 +850,12 @@ int aac_get_adapter_info(struct aac_dev* dev) ...@@ -822,12 +850,12 @@ int aac_get_adapter_info(struct aac_dev* dev)
dev->dac_support = (dacmode!=0); dev->dac_support = (dacmode!=0);
} }
if(dev->dac_support != 0) { if(dev->dac_support != 0) {
if (!pci_set_dma_mask(dev->pdev, 0xFFFFFFFFFFFFFFFFULL) && if (!pci_set_dma_mask(dev->pdev, DMA_64BIT_MASK) &&
!pci_set_consistent_dma_mask(dev->pdev, 0xFFFFFFFFFFFFFFFFULL)) { !pci_set_consistent_dma_mask(dev->pdev, DMA_64BIT_MASK)) {
printk(KERN_INFO"%s%d: 64 Bit DAC enabled\n", printk(KERN_INFO"%s%d: 64 Bit DAC enabled\n",
dev->name, dev->id); dev->name, dev->id);
} else if (!pci_set_dma_mask(dev->pdev, 0xFFFFFFFFULL) && } else if (!pci_set_dma_mask(dev->pdev, DMA_32BIT_MASK) &&
!pci_set_consistent_dma_mask(dev->pdev, 0xFFFFFFFFULL)) { !pci_set_consistent_dma_mask(dev->pdev, DMA_32BIT_MASK)) {
printk(KERN_INFO"%s%d: DMA mask set failed, 64 Bit DAC disabled\n", printk(KERN_INFO"%s%d: DMA mask set failed, 64 Bit DAC disabled\n",
dev->name, dev->id); dev->name, dev->id);
dev->dac_support = 0; dev->dac_support = 0;
...@@ -1438,7 +1466,6 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd) ...@@ -1438,7 +1466,6 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
struct Scsi_Host *host = scsicmd->device->host; struct Scsi_Host *host = scsicmd->device->host;
struct aac_dev *dev = (struct aac_dev *)host->hostdata; struct aac_dev *dev = (struct aac_dev *)host->hostdata;
struct fsa_dev_info *fsa_dev_ptr = dev->fsa_dev; struct fsa_dev_info *fsa_dev_ptr = dev->fsa_dev;
int cardtype = dev->cardtype;
int ret; int ret;
/* /*
...@@ -1542,14 +1569,14 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd) ...@@ -1542,14 +1569,14 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
* see: <vendor>.c i.e. aac.c * see: <vendor>.c i.e. aac.c
*/ */
if (scsicmd->device->id == host->this_id) { if (scsicmd->device->id == host->this_id) {
setinqstr(cardtype, (void *) (inq_data.inqd_vid), (sizeof(container_types)/sizeof(char *))); setinqstr(dev, (void *) (inq_data.inqd_vid), (sizeof(container_types)/sizeof(char *)));
inq_data.inqd_pdt = INQD_PDT_PROC; /* Processor device */ inq_data.inqd_pdt = INQD_PDT_PROC; /* Processor device */
aac_internal_transfer(scsicmd, &inq_data, 0, sizeof(inq_data)); aac_internal_transfer(scsicmd, &inq_data, 0, sizeof(inq_data));
scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_GOOD; scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_GOOD;
scsicmd->scsi_done(scsicmd); scsicmd->scsi_done(scsicmd);
return 0; return 0;
} }
setinqstr(cardtype, (void *) (inq_data.inqd_vid), fsa_dev_ptr[cid].type); setinqstr(dev, (void *) (inq_data.inqd_vid), fsa_dev_ptr[cid].type);
inq_data.inqd_pdt = INQD_PDT_DA; /* Direct/random access device */ inq_data.inqd_pdt = INQD_PDT_DA; /* Direct/random access device */
aac_internal_transfer(scsicmd, &inq_data, 0, sizeof(inq_data)); aac_internal_transfer(scsicmd, &inq_data, 0, sizeof(inq_data));
return aac_get_container_name(scsicmd, cid); return aac_get_container_name(scsicmd, cid);
......
...@@ -1560,7 +1560,7 @@ struct fib_ioctl ...@@ -1560,7 +1560,7 @@ struct fib_ioctl
struct revision struct revision
{ {
__le32 compat; u32 compat;
__le32 version; __le32 version;
__le32 build; __le32 build;
}; };
......
...@@ -408,7 +408,7 @@ static int check_revision(struct aac_dev *dev, void __user *arg) ...@@ -408,7 +408,7 @@ static int check_revision(struct aac_dev *dev, void __user *arg)
char *driver_version = aac_driver_version; char *driver_version = aac_driver_version;
u32 version; u32 version;
response.compat = cpu_to_le32(1); response.compat = 1;
version = (simple_strtol(driver_version, version = (simple_strtol(driver_version,
&driver_version, 10) << 24) | 0x00000400; &driver_version, 10) << 24) | 0x00000400;
version += simple_strtol(driver_version + 1, &driver_version, 10) << 16; version += simple_strtol(driver_version + 1, &driver_version, 10) << 16;
...@@ -574,7 +574,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) ...@@ -574,7 +574,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
rcode = -ENOMEM; rcode = -ENOMEM;
goto cleanup; goto cleanup;
} }
sg_user[i] = (void __user *)usg->sg[i].addr; sg_user[i] = (void __user *)(long)usg->sg[i].addr;
sg_list[i] = p; // save so we can clean up later sg_list[i] = p; // save so we can clean up later
sg_indx = i; sg_indx = i;
...@@ -624,7 +624,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) ...@@ -624,7 +624,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
rcode = -ENOMEM; rcode = -ENOMEM;
goto cleanup; goto cleanup;
} }
sg_user[i] = (void __user *)upsg->sg[i].addr; sg_user[i] = (void __user *)(long)upsg->sg[i].addr;
sg_list[i] = p; // save so we can clean up later sg_list[i] = p; // save so we can clean up later
sg_indx = i; sg_indx = i;
......
...@@ -752,8 +752,8 @@ static int __devinit aac_probe_one(struct pci_dev *pdev, ...@@ -752,8 +752,8 @@ static int __devinit aac_probe_one(struct pci_dev *pdev,
if (error) if (error)
goto out; goto out;
if (pci_set_dma_mask(pdev, 0xFFFFFFFFULL) || if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) ||
pci_set_consistent_dma_mask(pdev, 0xFFFFFFFFULL)) pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))
goto out; goto out;
/* /*
* If the quirk31 bit is set, the adapter needs adapter * If the quirk31 bit is set, the adapter needs adapter
...@@ -797,9 +797,9 @@ static int __devinit aac_probe_one(struct pci_dev *pdev, ...@@ -797,9 +797,9 @@ static int __devinit aac_probe_one(struct pci_dev *pdev,
* address space. * address space.
*/ */
if (aac_drivers[index].quirks & AAC_QUIRK_31BIT) if (aac_drivers[index].quirks & AAC_QUIRK_31BIT)
if (pci_set_dma_mask(pdev, 0xFFFFFFFFULL)) if (pci_set_dma_mask(pdev, DMA_32BIT_MASK))
goto out_free_fibs; goto out_deinit;
aac->maximum_num_channels = aac_drivers[index].channels; aac->maximum_num_channels = aac_drivers[index].channels;
error = aac_get_adapter_info(aac); error = aac_get_adapter_info(aac);
if (error < 0) if (error < 0)
......
...@@ -976,6 +976,16 @@ static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) ...@@ -976,6 +976,16 @@ static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
} }
} }
static inline void pio_trigger(void)
{
static int feedback_requested;
if (!feedback_requested) {
feedback_requested = 1;
printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> "
"to help improve support for your system.\n", __FILE__);
}
}
/* Prepare SRB for being sent to Device DCB w/ command *cmd */ /* Prepare SRB for being sent to Device DCB w/ command *cmd */
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
...@@ -2320,6 +2330,7 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, ...@@ -2320,6 +2330,7 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
CFG2_WIDEFIFO); CFG2_WIDEFIFO);
while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) { while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) {
u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
pio_trigger();
*(srb->virt_addr)++ = byte; *(srb->virt_addr)++ = byte;
if (debug_enabled(DBG_PIO)) if (debug_enabled(DBG_PIO))
printk(" %02x", byte); printk(" %02x", byte);
...@@ -2331,6 +2342,7 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, ...@@ -2331,6 +2342,7 @@ static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
/* Read the last byte ... */ /* Read the last byte ... */
if (srb->total_xfer_length > 0) { if (srb->total_xfer_length > 0) {
u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
pio_trigger();
*(srb->virt_addr)++ = byte; *(srb->virt_addr)++ = byte;
srb->total_xfer_length--; srb->total_xfer_length--;
if (debug_enabled(DBG_PIO)) if (debug_enabled(DBG_PIO))
...@@ -2507,6 +2519,7 @@ static void data_io_transfer(struct AdapterCtlBlk *acb, ...@@ -2507,6 +2519,7 @@ static void data_io_transfer(struct AdapterCtlBlk *acb,
if (debug_enabled(DBG_PIO)) if (debug_enabled(DBG_PIO))
printk(" %02x", (unsigned char) *(srb->virt_addr)); printk(" %02x", (unsigned char) *(srb->virt_addr));
pio_trigger();
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
*(srb->virt_addr)++); *(srb->virt_addr)++);
......
This diff is collapsed.
/*
* iSCSI Initiator TCP Transport
* Copyright (C) 2004 Dmitry Yusupov
* Copyright (C) 2004 Alex Aizman
* Copyright (C) 2005 Mike Christie
* maintained by open-iscsi@googlegroups.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* See the file COPYING included with this distribution for more details.
*/
#ifndef ISCSI_TCP_H
#define ISCSI_TCP_H
/* Session's states */
#define ISCSI_STATE_FREE 1
#define ISCSI_STATE_LOGGED_IN 2
#define ISCSI_STATE_FAILED 3
#define ISCSI_STATE_TERMINATE 4
/* Connection's states */
#define ISCSI_CONN_INITIAL_STAGE 0
#define ISCSI_CONN_STARTED 1
#define ISCSI_CONN_STOPPED 2
#define ISCSI_CONN_CLEANUP_WAIT 3
/* Connection suspend "bit" */
#define SUSPEND_BIT 1
/* Socket's Receive state machine */
#define IN_PROGRESS_WAIT_HEADER 0x0
#define IN_PROGRESS_HEADER_GATHER 0x1
#define IN_PROGRESS_DATA_RECV 0x2
#define IN_PROGRESS_DDIGEST_RECV 0x3
/* Task Mgmt states */
#define TMABORT_INITIAL 0x0
#define TMABORT_SUCCESS 0x1
#define TMABORT_FAILED 0x2
#define TMABORT_TIMEDOUT 0x3
/* xmit state machine */
#define XMSTATE_IDLE 0x0
#define XMSTATE_R_HDR 0x1
#define XMSTATE_W_HDR 0x2
#define XMSTATE_IMM_HDR 0x4
#define XMSTATE_IMM_DATA 0x8
#define XMSTATE_UNS_INIT 0x10
#define XMSTATE_UNS_HDR 0x20
#define XMSTATE_UNS_DATA 0x40
#define XMSTATE_SOL_HDR 0x80
#define XMSTATE_SOL_DATA 0x100
#define XMSTATE_W_PAD 0x200
#define XMSTATE_DATA_DIGEST 0x400
#define ISCSI_CONN_MAX 1
#define ISCSI_CONN_RCVBUF_MIN 262144
#define ISCSI_CONN_SNDBUF_MIN 262144
#define ISCSI_PAD_LEN 4
#define ISCSI_R2T_MAX 16
#define ISCSI_XMIT_CMDS_MAX 128 /* must be power of 2 */
#define ISCSI_MGMT_CMDS_MAX 32 /* must be power of 2 */
#define ISCSI_MGMT_ITT_OFFSET 0xa00
#define ISCSI_SG_TABLESIZE SG_ALL
#define ISCSI_CMD_PER_LUN 128
#define ISCSI_TCP_MAX_CMD_LEN 16
#define ITT_MASK (0xfff)
#define CID_SHIFT 12
#define CID_MASK (0xffff<<CID_SHIFT)
#define AGE_SHIFT 28
#define AGE_MASK (0xf<<AGE_SHIFT)
struct iscsi_queue {
struct kfifo *queue; /* FIFO Queue */
void **pool; /* Pool of elements */
int max; /* Max number of elements */
};
struct iscsi_session;
struct iscsi_cmd_task;
struct iscsi_mgmt_task;
/* Socket connection recieve helper */
struct iscsi_tcp_recv {
struct iscsi_hdr *hdr;
struct sk_buff *skb;
int offset;
int len;
int hdr_offset;
int copy;
int copied;
int padding;
struct iscsi_cmd_task *ctask; /* current cmd in progress */
/* copied and flipped values */
int opcode;
int flags;
int cmd_status;
int ahslen;
int datalen;
uint32_t itt;
int datadgst;
};
struct iscsi_conn {
struct iscsi_hdr hdr; /* header placeholder */
char hdrext[4*sizeof(__u16) +
sizeof(__u32)];
int data_copied;
char *data; /* data placeholder */
struct socket *sock; /* TCP socket */
int data_size; /* actual recv_dlength */
int stop_stage; /* conn_stop() flag: *
* stop to recover, *
* stop to terminate */
/* iSCSI connection-wide sequencing */
uint32_t exp_statsn;
int hdr_size; /* PDU header size */
unsigned long suspend_rx; /* suspend Rx */
struct crypto_tfm *rx_tfm; /* CRC32C (Rx) */
struct crypto_tfm *data_rx_tfm; /* CRC32C (Rx) for data */
/* control data */
int senselen; /* scsi sense length */
int id; /* CID */
struct iscsi_tcp_recv in; /* TCP receive context */
struct iscsi_session *session; /* parent session */
struct list_head item; /* maintains list of conns */
int in_progress; /* connection state machine */
int c_stage; /* connection state */
struct iscsi_mgmt_task *login_mtask; /* mtask used for login/text */
struct iscsi_mgmt_task *mtask; /* xmit mtask in progress */
struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
spinlock_t lock; /* FIXME: to be removed */
/* old values for socket callbacks */
void (*old_data_ready)(struct sock *, int);
void (*old_state_change)(struct sock *);
void (*old_write_space)(struct sock *);
/* xmit */
struct crypto_tfm *tx_tfm; /* CRC32C (Tx) */
struct crypto_tfm *data_tx_tfm; /* CRC32C (Tx) for data */
struct kfifo *writequeue; /* write cmds for Data-Outs */
struct kfifo *immqueue; /* immediate xmit queue */
struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
struct kfifo *xmitqueue; /* data-path cmd queue */
struct work_struct xmitwork; /* per-conn. xmit workqueue */
struct semaphore xmitsema; /* serializes connection xmit,
* access to kfifos: *
* xmitqueue, writequeue, *
* immqueue, mgmtqueue */
unsigned long suspend_tx; /* suspend Tx */
/* abort */
wait_queue_head_t ehwait; /* used in eh_abort() */
struct iscsi_tm tmhdr;
struct timer_list tmabort_timer; /* abort timer */
int tmabort_state; /* see TMABORT_INITIAL, etc.*/
/* negotiated params */
int max_recv_dlength;
int max_xmit_dlength;
int hdrdgst_en;
int datadgst_en;
/* MIB-statistics */
uint64_t txdata_octets;
uint64_t rxdata_octets;
uint32_t scsicmd_pdus_cnt;
uint32_t dataout_pdus_cnt;
uint32_t scsirsp_pdus_cnt;
uint32_t datain_pdus_cnt;
uint32_t r2t_pdus_cnt;
uint32_t tmfcmd_pdus_cnt;
int32_t tmfrsp_pdus_cnt;
/* custom statistics */
uint32_t sendpage_failures_cnt;
uint32_t discontiguous_hdr_cnt;
uint32_t eh_abort_cnt;
};
struct iscsi_session {
/* iSCSI session-wide sequencing */
uint32_t cmdsn;
uint32_t exp_cmdsn;
uint32_t max_cmdsn;
/* configuration */
int initial_r2t_en;
int max_r2t;
int imm_data_en;
int first_burst;
int max_burst;
int time2wait;
int time2retain;
int pdu_inorder_en;
int dataseq_inorder_en;
int erl;
int ifmarker_en;
int ofmarker_en;
/* control data */
struct Scsi_Host *host;
int id;
struct iscsi_conn *leadconn; /* leading connection */
spinlock_t lock; /* protects session state, *
* sequence numbers, *
* session resources: *
* - cmdpool, *
* - mgmtpool, *
* - r2tpool */
int state; /* session state */
struct list_head item;
void *auth_client;
int conn_cnt;
int age; /* counts session re-opens */
struct list_head connections; /* list of connections */
int cmds_max; /* size of cmds array */
struct iscsi_cmd_task **cmds; /* Original Cmds arr */
struct iscsi_queue cmdpool; /* PDU's pool */
int mgmtpool_max; /* size of mgmt array */
struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */
struct iscsi_queue mgmtpool; /* Mgmt PDU's pool */
};
struct iscsi_buf {
struct scatterlist sg;
struct kvec iov;
unsigned int sent;
};
struct iscsi_data_task {
struct iscsi_data hdr; /* PDU */
char hdrext[sizeof(__u32)]; /* Header-Digest */
struct list_head item; /* data queue item */
struct iscsi_buf digestbuf; /* digest buffer */
uint32_t digest; /* data digest */
};
#define ISCSI_DTASK_DEFAULT_MAX ISCSI_SG_TABLESIZE * PAGE_SIZE / 512
struct iscsi_mgmt_task {
struct iscsi_hdr hdr; /* mgmt. PDU */
char hdrext[sizeof(__u32)]; /* Header-Digest */
char *data; /* mgmt payload */
int xmstate; /* mgmt xmit progress */
int data_count; /* counts data to be sent */
struct iscsi_buf headbuf; /* header buffer */
struct iscsi_buf sendbuf; /* in progress buffer */
int sent;
uint32_t itt; /* this ITT */
};
struct iscsi_r2t_info {
__be32 ttt; /* copied from R2T */
__be32 exp_statsn; /* copied from R2T */
uint32_t data_length; /* copied from R2T */