mirror of
https://github.com/SCST-project/scst.git
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1e168e6676
Change 'compability' to 'compatibility'.
This patch fixes the following checkpatch warning:
WARNING: 'compability' may be misspelled - perhaps 'compatibility'?
266 lines
6.1 KiB
C
266 lines
6.1 KiB
C
/*
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* Copyright (C) 2007 - 2018 Vladislav Bolkhovitin
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* Copyright (C) 2007 - 2018 Western Digital Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2
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* of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _ISCSI_SCST_U_H
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#define _ISCSI_SCST_U_H
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#ifdef __KERNEL__
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#include <linux/uaccess.h> /* mm_segment_t */
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#include <linux/version.h>
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/* <asm/uaccess.h> */
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
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/*
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* With kernel 5.9 or older, certain kernel functions, e.g. setsockopt(),
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* sock_recvmsg() only accept a pointer to a user space buffer. With kernel
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* v5.10 these functions accept a sockptr_t, a data structure that includes
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* information about the address space of a pointer. See also commit
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* 47058bb54b57 ("x86: remove address space overrides using set_fs()"). See
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* also https://lwn.net/Articles/832121/. The definitions below make it easy
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* to write kernel code that is compatible with all kernel versions.
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*/
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 18, 0)
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/*
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* Backport mm_segment_t to save compatibility with older kernel versions.
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*
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* mm_segment_t was dropped in commit
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* 967747bbc084 ("uaccess: remove CONFIG_SET_FS") # v5.18
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*/
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typedef struct {
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/* empty dummy */
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} mm_segment_t;
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#endif
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#define KERNEL_DS ((mm_segment_t) { })
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static inline mm_segment_t get_fs(void) { return ((mm_segment_t) { }); }
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static inline void set_fs(mm_segment_t seg) { }
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#endif
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#endif
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#ifdef __KERNEL__
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#include <linux/types.h>
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#else
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#include <sys/uio.h>
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#define aligned_u64 uint64_t __attribute__((aligned(8)))
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#endif
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#include "iscsi_scst_ver.h"
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#include "iscsi_scst_itf_ver.h"
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/* The maximum length of 223 bytes in the RFC. */
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#define ISCSI_NAME_LEN 256
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#define ISCSI_PORTAL_LEN 64
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/* Full name is iSCSI name + connected portal */
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#define ISCSI_FULL_NAME_LEN (ISCSI_NAME_LEN + ISCSI_PORTAL_LEN)
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#define ISCSI_LISTEN_PORT 3260
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#define SCSI_ID_LEN 24
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#define ISCSI_MAX_ATTR_NAME_LEN 50
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#define ISCSI_MAX_ATTR_VALUE_LEN 512
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enum {
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key_initial_r2t,
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key_immediate_data,
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key_max_connections,
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key_max_recv_data_length,
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key_max_xmit_data_length,
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key_max_burst_length,
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key_first_burst_length,
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key_default_wait_time,
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key_default_retain_time,
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key_max_outstanding_r2t,
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key_data_pdu_inorder,
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key_data_sequence_inorder,
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key_error_recovery_level,
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key_header_digest,
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key_data_digest,
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key_ofmarker,
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key_ifmarker,
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key_ofmarkint,
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key_ifmarkint,
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key_rdma_extensions,
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key_target_recv_data_length,
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key_initiator_recv_data_length,
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key_max_ahs_length,
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key_tagged_buffer_for_solicited_data_only,
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key_iser_hello_required,
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key_max_outstanding_unexpected_pdus,
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session_key_last,
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};
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enum {
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key_queued_cmnds,
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key_rsp_timeout,
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key_nop_in_interval,
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key_nop_in_timeout,
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key_max_sessions,
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target_key_last,
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};
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enum {
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key_session,
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key_target,
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};
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struct iscsi_kern_target_info {
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u32 tid;
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u32 cookie;
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char name[ISCSI_NAME_LEN];
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u32 attrs_num;
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aligned_u64 attrs_ptr;
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};
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struct iscsi_kern_session_info {
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u32 tid;
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aligned_u64 sid;
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char initiator_name[ISCSI_NAME_LEN];
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char full_initiator_name[ISCSI_FULL_NAME_LEN];
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u32 exp_cmd_sn;
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s32 session_params[session_key_last];
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s32 target_params[target_key_last];
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};
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#define DIGEST_ALL (DIGEST_NONE | DIGEST_CRC32C)
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#define DIGEST_NONE (1 << 0)
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#define DIGEST_CRC32C (1 << 1)
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struct iscsi_kern_conn_info {
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u32 tid;
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aligned_u64 sid;
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u32 cid;
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u32 stat_sn;
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u32 exp_stat_sn;
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int fd;
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};
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struct iscsi_kern_attr {
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u32 mode;
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char name[ISCSI_MAX_ATTR_NAME_LEN];
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};
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struct iscsi_kern_mgmt_cmd_res_info {
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u32 tid;
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u32 cookie;
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u32 req_cmd;
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u32 result;
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char value[ISCSI_MAX_ATTR_VALUE_LEN];
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};
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struct iscsi_kern_params_info {
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u32 tid;
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aligned_u64 sid;
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u32 params_type;
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u32 partial;
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s32 session_params[session_key_last];
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s32 target_params[target_key_last];
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};
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enum iscsi_kern_event_code {
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E_ADD_TARGET,
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E_DEL_TARGET,
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E_MGMT_CMD,
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E_ENABLE_TARGET,
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E_DISABLE_TARGET,
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E_GET_ATTR_VALUE,
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E_SET_ATTR_VALUE,
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E_CONN_CLOSE,
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};
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struct iscsi_kern_event {
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u32 tid;
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aligned_u64 sid;
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u32 cid;
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u32 code;
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u32 cookie;
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u32 param1_size;
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u32 param2_size;
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};
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struct iscsi_kern_register_info {
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union {
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aligned_u64 version;
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struct {
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int max_data_seg_len;
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int max_queued_cmds;
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};
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};
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};
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struct iscsi_kern_attr_info {
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u32 tid;
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u32 cookie;
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struct iscsi_kern_attr attr;
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};
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struct iscsi_kern_initiator_info {
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u32 tid;
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char full_initiator_name[ISCSI_FULL_NAME_LEN];
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};
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#define DEFAULT_NR_QUEUED_CMNDS 32
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#define MIN_NR_QUEUED_CMNDS 1
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#define MAX_NR_QUEUED_CMNDS 2048
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#define DEFAULT_RSP_TIMEOUT 90
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#define MIN_RSP_TIMEOUT 2
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#define MAX_RSP_TIMEOUT 65535
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#define DEFAULT_NOP_IN_INTERVAL 30
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#define MIN_NOP_IN_INTERVAL 0
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#define MAX_NOP_IN_INTERVAL 65535
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#define DEFAULT_NOP_IN_TIMEOUT 30
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#define MIN_NOP_IN_TIMEOUT 2
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#define MAX_NOP_IN_TIMEOUT 65535
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#define NETLINK_ISCSI_SCST 25
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#define REGISTER_USERD _IOWR('s', 0, struct iscsi_kern_register_info)
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#define ADD_TARGET _IOW('s', 1, struct iscsi_kern_target_info)
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#define DEL_TARGET _IOW('s', 2, struct iscsi_kern_target_info)
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#define ADD_SESSION _IOW('s', 3, struct iscsi_kern_session_info)
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#define DEL_SESSION _IOW('s', 4, struct iscsi_kern_session_info)
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#define ADD_CONN _IOW('s', 5, struct iscsi_kern_conn_info)
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#define DEL_CONN _IOW('s', 6, struct iscsi_kern_conn_info)
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#define ISCSI_PARAM_SET _IOW('s', 7, struct iscsi_kern_params_info)
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#define ISCSI_PARAM_GET _IOWR('s', 8, struct iscsi_kern_params_info)
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#define ISCSI_ATTR_ADD _IOW('s', 9, struct iscsi_kern_attr_info)
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#define ISCSI_ATTR_DEL _IOW('s', 10, struct iscsi_kern_attr_info)
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#define MGMT_CMD_CALLBACK _IOW('s', 11, struct iscsi_kern_mgmt_cmd_res_info)
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#define ISCSI_INITIATOR_ALLOWED _IOW('s', 12, struct iscsi_kern_initiator_info)
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static inline int iscsi_is_key_internal(int key)
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{
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switch (key) {
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case key_max_xmit_data_length:
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return 1;
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default:
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return 0;
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}
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}
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#endif
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