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man pages section 9: DDI and DKI Properties and Data Structures     Oracle Solaris 11.1 Information Library
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Document Information

Preface

Introduction

Data Structures for Drivers

aio_req(9S)

audio_engine_ops(9S)

blksize(9P)

buf(9S)

cb_ops(9S)

copyreq(9S)

copyresp(9S)

datab(9S)

dblk(9S)

ddi_device_acc_attr(9S)

ddi_dma_attr(9S)

ddi_dma_cookie(9S)

ddi_dmae_req(9S)

ddi_dma_lim(9S)

ddi_dma_lim_sparc(9S)

ddi_dma_lim_x86(9S)

ddi_dma_req(9S)

ddi_fm_error(9S)

ddi-forceattach(9P)

ddi_idevice_cookie(9S)

ddi-no-autodetach(9P)

ddi-no-modunload(9P)

device-blksize(9P)

device-nblocks(9P)

device-pblksize(9P)

devmap_callback_ctl(9S)

dev_ops(9S)

fmodsw(9S)

free_rtn(9S)

gld_mac_info(9S)

gld_stats(9S)

hook_nic_event(9S)

hook_pkt_event(9S)

hook_t(9S)

inquiry-device-type(9P)

inquiry-product-id(9P)

inquiry-revision-id(9P)

inquiry-serial-no(9P)

inquiry-vendor-id(9P)

iocblk(9S)

iovec(9S)

kstat(9S)

kstat_intr(9S)

kstat_io(9S)

kstat_named(9S)

linkblk(9S)

lso_basic_tcp_ipv4(9S)

mac_callbacks(9S)

mac_capab_lso(9S)

mac_capab_rings(9S)

mac_group_info(9S)

mac_register(9S)

mac_ring_info(9S)

mblk(9S)

modldrv(9S)

modlinkage(9S)

modlmisc(9S)

modlstrmod(9S)

module_info(9S)

msgb(9S)

Nblock(9P)

net_inject_t(9S)

net_instance_t(9S)

no-involuntary-power-cycles(9P)

pblksize(9P)

pm(9P)

pm-components(9P)

qband(9S)

qinit(9S)

queclass(9S)

queue(9S)

removable-media(9P)

scsi_address(9S)

scsi_arq_status(9S)

scsi_asc_key_strings(9S)

scsi_device(9S)

scsi_extended_sense(9S)

scsi_hba_tran(9S)

scsi_inquiry(9S)

scsi_pkt(9S)

scsi_status(9S)

size(9P)

sof_ops(9S)

streamtab(9S)

stroptions(9S)

tuple(9S)

uio(9S)

usb_bulk_request(9S)

usb_callback_flags(9S)

usb_cfg_descr(9S)

usb_client_dev_data(9S)

usb_completion_reason(9S)

usb_ctrl_request(9S)

usb_dev_descr(9S)

usb_dev_qlf_descr(9S)

usb_ep_descr(9S)

usb_if_descr(9S)

usb_intr_request(9S)

usb_isoc_request(9S)

usb_other_speed_cfg_descr(9S)

usb_request_attributes(9S)

usb_string_descr(9S)

msgb

, mblk

- STREAMS message block structure

Synopsis

#include <sys/stream.h> 

Interface Level

Architecture independent level 1 (DDI/DKI)

Description

A STREAMS message is made up of one or more message blocks, referenced by a pointer to a msgb structure. The b_next and b_prev pointers are used to link messages together on a QUEUE. The b_cont pointer links message blocks together when a message consists of more than one block.

Each msgb structure also includes a pointer to a datab(9S) structure, the data block (which contains pointers to the actual data of the message), and the type of the message.

Structure Members

struct msgb     *b_next;    /* next message on queue */
struct msgb     *b_prev;    /* previous message on queue */
struct msgb     *b_cont;    /* next message block */
unsigned char   *b_rptr;    /* 1st unread data byte of buffer */
unsigned char   *b_wptr;    /* 1st unwritten data byte of buffer */
struct datab    *b_datap;   /* pointer to data block */
unsigned char   b_band;     /* message priority  */
unsigned short  b_flag;     /* used by stream head  */

Valid flags are as follows:

MSGMARK

Last byte of message is marked.

MSGDELIM

Message is delimited.

The msgb structure is defined as type mblk_t.

See Also

datab(9S)

Writing Device Drivers

STREAMS Programming Guide