| typedef struct scsi_request Scsi_Request; |
| |
| static Scsi_Request *dummy_cmdp; /* only used for sizeof */ |
| |
| typedef struct sg_scatter_hold { /* holding area for scsi scatter gather info */ |
| unsigned short k_use_sg; /* Count of kernel scatter-gather pieces */ |
| unsigned short sglist_len; /* size of malloc'd scatter-gather list ++ */ |
| unsigned bufflen; /* Size of (aggregate) data buffer */ |
| unsigned b_malloc_len; /* actual len malloc'ed in buffer */ |
| void *buffer; /* Data buffer or scatter list (k_use_sg>0) */ |
| char dio_in_use; /* 0->indirect IO (or mmap), 1->dio */ |
| unsigned char cmd_opcode; /* first byte of command */ |
| } Sg_scatter_hold; |
| |
| typedef struct sg_request { /* SG_MAX_QUEUE requests outstanding per file */ |
| Scsi_Request *my_cmdp; /* != 0 when request with lower levels */ |
| struct sg_request *nextrp; /* NULL -> tail request (slist) */ |
| struct sg_fd *parentfp; /* NULL -> not in use */ |
| Sg_scatter_hold data; /* hold buffer, perhaps scatter list */ |
| sg_io_hdr_t header; /* scsi command+info, see <scsi/sg.h> */ |
| unsigned char sense_b[sizeof (dummy_cmdp->sr_sense_buffer)]; |
| char res_used; /* 1 -> using reserve buffer, 0 -> not ... */ |
| char orphan; /* 1 -> drop on sight, 0 -> normal */ |
| char sg_io_owned; /* 1 -> packet belongs to SG_IO */ |
| volatile char done; /* 0->before bh, 1->before read, 2->read */ |
| } Sg_request; |
