/* SCSI Tape Driver for Linux version 1.1 and newer. See the accompanying file README.st for more information. History: OnStream SCSI Tape support (osst) cloned from st.c by Willem Riede (osst@riede.org) Feb 2000 Fixes ... Kurt Garloff Mar 2000 Rewritten from Dwayne Forsyth's SCSI tape driver by Kai Makisara. Contribution and ideas from several people including (in alphabetical order) Klaus Ehrenfried, Wolfgang Denk, Steve Hirsch, Andreas Koppenh"ofer, Michael Leodolter, Eyal Lebedinsky, J"org Weule, and Eric Youngdale. Copyright 1992 - 2000 Kai Makisara email Kai.Makisara@metla.fi $Header: /home/cvsroot/Driver/osst.c,v 1.51 2000/12/22 20:48:27 garloff Exp $ Microscopic alterations - Rik Ling, 2000/12/21 Last modified: Wed Feb 2 22:04:05 2000 by makisara@kai.makisara.local Some small formal changes - aeb, 950809 */ static const char * cvsid = "$Id: osst.c,v 1.51 2000/12/22 20:48:27 garloff Exp $"; const char * osst_version = "0.9.4.3"; /* The "failure to reconnect" firmware bug */ #define OSST_FW_NEED_POLL_MIN 10602 /*(107A)*/ #define OSST_FW_NEED_POLL_MAX 10708 /*(108D)*/ #define OSST_FW_NEED_POLL(x,d) ((x) >= OSST_FW_NEED_POLL_MIN && (x) <= OSST_FW_NEED_POLL_MAX && d->host->this_id != 7) #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* The driver prints some debugging information on the console if DEBUG is defined and non-zero. */ #define DEBUG 0 /* The message level for the debug messages is currently set to KERN_NOTICE so that people can easily see the messages. Later when the debugging messages in the drivers are more widely classified, this may be changed to KERN_DEBUG. */ #define OSST_DEB_MSG KERN_NOTICE #define MAJOR_NR OSST_MAJOR #include #include "scsi.h" #include "hosts.h" #include #define ST_KILOBYTE 1024 #include "st.h" #include "osst.h" #include "osst_options.h" #include "osst_detect.h" #include "constants.h" static int buffer_kbs = 0; static int write_threshold_kbs = 0; static int max_buffers = 0; static int max_sg_segs = 0; #ifdef MODULE MODULE_AUTHOR("Willem Riede"); MODULE_DESCRIPTION("OnStream SCSI Tape Driver"); MODULE_PARM(buffer_kbs, "i"); MODULE_PARM(write_threshold_kbs, "i"); MODULE_PARM(max_buffers, "i"); MODULE_PARM(max_sg_segs, "i"); #else static struct osst_dev_parm { char *name; int *val; } parms[] __initdata = { { "buffer_kbs", &buffer_kbs }, { "write_threshold_kbs", &write_threshold_kbs }, { "max_buffers", &max_buffers }, { "max_sg_segs", &max_sg_segs } }; #endif /* Some default definitions have been moved to osst_options.h */ #define OSST_BUFFER_SIZE (OSST_BUFFER_BLOCKS * ST_KILOBYTE) #define OSST_WRITE_THRESHOLD (OSST_WRITE_THRESHOLD_BLOCKS * ST_KILOBYTE) /* The buffer size should fit into the 24 bits for length in the 6-byte SCSI read and write commands. */ #if OSST_BUFFER_SIZE >= (2 << 24 - 1) #error "Buffer size should not exceed (2 << 24 - 1) bytes!" #endif #if DEBUG static int debugging = 1; #endif #define MAX_RETRIES 0 #define MAX_WRITE_RETRIES 0 #define MAX_READY_RETRIES 5 #define NO_TAPE NOT_READY #define OSST_TIMEOUT (200 * HZ) #define OSST_LONG_TIMEOUT (1800 * HZ) #define TAPE_NR(x) (MINOR(x) & ~(128 | ST_MODE_MASK)) #define TAPE_MODE(x) ((MINOR(x) & ST_MODE_MASK) >> ST_MODE_SHIFT) /* Internal ioctl to set both density (uppermost 8 bits) and blocksize (lower 24 bits) */ #define SET_DENS_AND_BLK 0x10001 static int osst_nbr_buffers; static int osst_buffer_size = OSST_BUFFER_SIZE; static int osst_write_threshold = OSST_WRITE_THRESHOLD; static int osst_max_buffers = OSST_MAX_BUFFERS; static int osst_max_sg_segs = OSST_MAX_SG; static OS_Scsi_Tape **os_scsi_tapes = NULL; static OSST_buffer **osst_buffers = NULL; static int modes_defined = FALSE; static OSST_buffer *new_tape_buffer(int, int); static int enlarge_buffer(OSST_buffer *, int, int); static void normalize_buffer(OSST_buffer *); static int append_to_buffer(const char *, OSST_buffer *, int); static int from_buffer(OSST_buffer *, char *, int); static int osst_zero_buffer_tail(OSST_buffer *); static int osst_copy_to_buffer(OSST_buffer *, unsigned char *); static int osst_copy_from_buffer(OSST_buffer *, unsigned char *); static int osst_init(void); static int osst_attach(Scsi_Device *); static int osst_detect(Scsi_Device *); static void osst_detach(Scsi_Device *); struct Scsi_Device_Template osst_template = { name: "OnStream tape", tag: "osst", scsi_type: TYPE_TAPE, major: OSST_MAJOR, detect: osst_detect, init: osst_init, attach: osst_attach, detach: osst_detach }; static int osst_int_ioctl(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, unsigned int cmd_in,unsigned long arg); static int osst_set_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int frame, int skip); static int osst_get_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt); static int osst_flush_write_buffer(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int file_blk); static int osst_write_error_recovery(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int pending); /* Routines that handle the interaction with mid-layer SCSI routines */ /* Convert the result to success code */ static int osst_chk_result(OS_Scsi_Tape * STp, Scsi_Request * SRpnt) { int dev = TAPE_NR(STp->devt); int result = SRpnt->sr_result; unsigned char * sense = SRpnt->sr_sense_buffer, scode; #if DEBUG const char *stp; #endif if (!result) { sense[0] = 0; /* We don't have sense data if this byte is zero */ return 0; } if (driver_byte(result) & DRIVER_SENSE) scode = sense[2] & 0x0f; else { sense[0] = 0; /* We don't have sense data if this byte is zero */ scode = 0; } #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%d: Error: %x, cmd: %x %x %x %x %x %x Len: %d\n", dev, result, SRpnt->sr_cmnd[0], SRpnt->sr_cmnd[1], SRpnt->sr_cmnd[2], SRpnt->sr_cmnd[3], SRpnt->sr_cmnd[4], SRpnt->sr_cmnd[5], SRpnt->sr_bufflen); if (driver_byte(result) & DRIVER_SENSE) print_req_sense("osst", SRpnt); } else #endif if (!(driver_byte(result) & DRIVER_SENSE) || ((sense[0] & 0x70) == 0x70 && scode != NO_SENSE && scode != RECOVERED_ERROR && /* scode != UNIT_ATTENTION && */ scode != BLANK_CHECK && scode != VOLUME_OVERFLOW && SRpnt->sr_cmnd[0] != MODE_SENSE && SRpnt->sr_cmnd[0] != TEST_UNIT_READY)) { /* Abnormal conditions for tape */ if (driver_byte(result) & DRIVER_SENSE) { printk(KERN_WARNING "osst%d: Error with sense data: ", dev); print_req_sense("osst", SRpnt); } else printk(KERN_WARNING "osst%d: Error %x (sugg. bt 0x%x, driver bt 0x%x, host bt 0x%x).\n", dev, result, suggestion(result), driver_byte(result) & DRIVER_MASK, host_byte(result)); } if ((sense[0] & 0x70) == 0x70 && scode == RECOVERED_ERROR) { STp->recover_count++; STp->recover_erreg++; #if DEBUG if (debugging) { if (SRpnt->sr_cmnd[0] == READ_6) stp = "read"; else if (SRpnt->sr_cmnd[0] == WRITE_6) stp = "write"; else stp = "ioctl"; printk(OSST_DEB_MSG "osst%d: Recovered %s error (%d).\n", dev, stp, os_scsi_tapes[dev]->recover_count); } #endif if ((sense[2] & 0xe0) == 0) return 0; } return (-EIO); } /* Wakeup from interrupt */ static void osst_sleep_done (Scsi_Cmnd * SCpnt) { unsigned int dev; int remainder; OS_Scsi_Tape * STp; if ((dev = TAPE_NR(SCpnt->request.rq_dev)) < osst_template.nr_dev) { STp = os_scsi_tapes[dev]; if ((STp->buffer)->writing && (SCpnt->sense_buffer[0] & 0x70) == 0x70 && (SCpnt->sense_buffer[2] & 0x40)) { /* EOM at write-behind, has all been written? */ if ((SCpnt->sense_buffer[0] & 0x80) != 0) remainder = (SCpnt->sense_buffer[3] << 24) | (SCpnt->sense_buffer[4] << 16) | (SCpnt->sense_buffer[5] << 8 ) | SCpnt->sense_buffer[6]; else remainder = 0; if ((SCpnt->sense_buffer[2] & 0x0f) == VOLUME_OVERFLOW || remainder > 0) (STp->buffer)->midlevel_result = SCpnt->result; /* Error */ else (STp->buffer)->midlevel_result = INT_MAX; /* OK */ } else (STp->buffer)->midlevel_result = SCpnt->result; SCpnt->request.rq_status = RQ_SCSI_DONE; (STp->buffer)->last_SRpnt = SCpnt->sc_request; #if DEBUG STp->write_pending = 0; #endif up(SCpnt->request.sem); } #if DEBUG else if (debugging) printk(KERN_ERR "osst?: Illegal interrupt device %x\n", dev); #endif } /* Do the scsi command. Waits until command performed if do_wait is true. Otherwise osst_write_behind_check() is used to check that the command has finished. */ static Scsi_Request * osst_do_scsi(Scsi_Request *SRpnt, OS_Scsi_Tape *STp, unsigned char *cmd, int bytes, int direction, int timeout, int retries, int do_wait) { unsigned char *bp; //static int inject = 0; /* FIXME - take out inject occasional read errors */ //static int repeat = 0; if (SRpnt == NULL) { if ((SRpnt = scsi_allocate_request(STp->device)) == NULL) { printk(KERN_ERR "osst%d: Can't get SCSI request.\n", TAPE_NR(STp->devt)); if (signal_pending(current)) (STp->buffer)->syscall_result = (-EINTR); else (STp->buffer)->syscall_result = (-EBUSY); return NULL; } } cmd[1] |= (SRpnt->sr_device->lun << 5) & 0xe0; init_MUTEX_LOCKED(&STp->sem); SRpnt->sr_use_sg = (bytes > (STp->buffer)->sg[0].length) ? (STp->buffer)->use_sg : 0; if (SRpnt->sr_use_sg) { bp = (char *)&(STp->buffer->sg[0]); if (STp->buffer->sg_segs < SRpnt->sr_use_sg) SRpnt->sr_use_sg = STp->buffer->sg_segs; } else bp = (STp->buffer)->b_data; SRpnt->sr_data_direction = direction; SRpnt->sr_cmd_len = 0; SRpnt->sr_request.sem = &(STp->sem); SRpnt->sr_request.rq_status = RQ_SCSI_BUSY; SRpnt->sr_request.rq_dev = STp->devt; scsi_do_req(SRpnt, (void *)cmd, bp, bytes, osst_sleep_done, timeout, retries); if (do_wait) { down(SRpnt->sr_request.sem); SRpnt->sr_request.sem = NULL; STp->buffer->syscall_result = osst_chk_result(STp, SRpnt); //if ((STp->buffer)->syscall_result == 0 && // cmd[0] == READ_6 && cmd[4] && ( /* (++ inject % 83) == 29 || */ // (STp->first_frame_position == 240 /* or STp->read_error_frame to fail again on the block calculated above */ && ++repeat < 3))) { // printk(OSST_DEB_MSG "osst%d: injecting read error\n", TAPE_NR(STp->devt)); // STp->buffer->last_result_fatal = 1; /* FIXME - take out inject occasional read errors */ //} } return SRpnt; } /* Handle the write-behind checking (downs the semaphore) */ static void osst_write_behind_check(OS_Scsi_Tape *STp) { OSST_buffer * STbuffer; ST_partstat * STps; STbuffer = STp->buffer; #if DEBUG if (STp->write_pending) STp->nbr_waits++; else STp->nbr_finished++; #endif down(&(STp->sem)); (STp->buffer)->last_SRpnt->sr_request.sem = NULL; STp->buffer->syscall_result = osst_chk_result(STp, STp->buffer->last_SRpnt); if ((STp->buffer)->syscall_result) (STp->buffer)->syscall_result = osst_write_error_recovery(STp, &((STp->buffer)->last_SRpnt), 1); else STp->first_frame_position++; scsi_release_request((STp->buffer)->last_SRpnt); if (STbuffer->writing < STbuffer->buffer_bytes) #if 0 memcpy(STbuffer->b_data, STbuffer->b_data + STbuffer->writing, STbuffer->buffer_bytes - STbuffer->writing); #else printk(KERN_WARNING "osst: write_behind_check: something left in buffer!\n"); #endif STbuffer->buffer_bytes -= STbuffer->writing; STps = &(STp->ps[STp->partition]); if (STps->drv_block >= 0) { if (STp->block_size == 0) STps->drv_block++; else STps->drv_block += STbuffer->writing / STp->block_size; } STbuffer->writing = 0; return; } /* Onstream specific Routines */ /* * Initialize the OnStream AUX */ static void osst_init_aux(OS_Scsi_Tape * STp, int frame_type, int logical_blk_num) { os_aux_t *aux = STp->buffer->aux; os_partition_t *par = &aux->partition; os_dat_t *dat = &aux->dat; if (STp->raw) return; memset(aux, 0, sizeof(*aux)); aux->format_id = htonl(0); memcpy(aux->application_sig, "LIN4", 4); aux->hdwr = htonl(0); aux->frame_type = frame_type; switch (frame_type) { case OS_FRAME_TYPE_HEADER: aux->update_frame_cntr = htonl(STp->update_frame_cntr); par->partition_num = OS_CONFIG_PARTITION; par->par_desc_ver = OS_PARTITION_VERSION; par->wrt_pass_cntr = htons(0xffff); /* 0-4 = reserved, 5-9 = header, 2990-2994 = header, 2995-2999 = reserved */ par->first_frame_ppos = htonl(0); par->last_frame_ppos = htonl(0xbb7); aux->frame_seq_num = htonl(0); aux->logical_blk_num_high = htonl(0); aux->logical_blk_num = htonl(0); aux->next_mark_ppos = htonl(STp->first_mark_ppos); break; case OS_FRAME_TYPE_DATA: case OS_FRAME_TYPE_MARKER: dat->dat_sz = 8; dat->reserved1 = 0; dat->entry_cnt = 1; dat->reserved3 = 0; dat->dat_list[0].blk_sz = htonl(frame_type==OS_FRAME_TYPE_DATA?STp->block_size:0); dat->dat_list[0].blk_cnt = htons(1); dat->dat_list[0].flags = frame_type==OS_FRAME_TYPE_MARKER?OS_DAT_FLAGS_MARK:OS_DAT_FLAGS_DATA; dat->dat_list[0].reserved = 0; case OS_FRAME_TYPE_EOD: aux->update_frame_cntr = htonl(0); par->partition_num = OS_DATA_PARTITION; par->par_desc_ver = OS_PARTITION_VERSION; par->wrt_pass_cntr = htons(STp->wrt_pass_cntr); par->first_frame_ppos = htonl(STp->first_data_ppos); par->last_frame_ppos = htonl(STp->capacity); aux->frame_seq_num = htonl(logical_blk_num); aux->logical_blk_num_high = htonl(0); aux->logical_blk_num = htonl(logical_blk_num); break; default: ; /* probably FILL */ } aux->filemark_cnt = ntohl(STp->filemark_cnt); /* FIXME -- violates ADR spec */ aux->phys_fm = ntohl(0xffffffff); aux->last_mark_ppos = ntohl(STp->last_mark_ppos); } /* * Verify that we have the correct tape frame */ static int osst_verify_frame(OS_Scsi_Tape * STp, int logical_blk_num, int quiet) { os_aux_t * aux = STp->buffer->aux; os_partition_t * par = &(aux->partition); ST_partstat * STps = &(STp->ps[STp->partition]); int i; int dev = TAPE_NR(STp->devt); if (STp->raw) { if (STp->buffer->syscall_result) { for (i=0; i < STp->buffer->sg_segs; i++) memset(STp->buffer->sg[i].address, 0, STp->buffer->sg[i].length); strcpy(STp->buffer->b_data, "READ ERROR ON FRAME"); } return 1; } if (STp->buffer->syscall_result) { printk(KERN_INFO "osst%d: Skipping frame, read error\n", dev); return 0; } if (ntohl(aux->format_id) != 0) { printk(KERN_INFO "osst%d: Skipping frame, format_id %u\n", dev, ntohl(aux->format_id)); return 0; } if (memcmp(aux->application_sig, STp->application_sig, 4) != 0 && (memcmp(aux->application_sig, "LIN3", 4) != 0 || STp->linux_media_version != 4)) { printk(KERN_INFO "osst%d: Skipping frame, incorrect application signature\n", dev); return 0; } if (par->partition_num != OS_DATA_PARTITION) { if (!STp->linux_media || STp->linux_media_version != 2) { printk(KERN_INFO "osst%d: Skipping frame, partition num %d\n", dev, par->partition_num); return 0; } } if (par->par_desc_ver != OS_PARTITION_VERSION) { printk(KERN_INFO "osst%d: Skipping frame, partition version %d\n", dev, par->par_desc_ver); return 0; } if (ntohs(par->wrt_pass_cntr) != STp->wrt_pass_cntr) { printk(KERN_INFO "osst%d: Skipping frame, wrt_pass_cntr %d (expected %d)\n", dev, ntohs(par->wrt_pass_cntr), STp->wrt_pass_cntr); return 0; } if (aux->frame_seq_num != aux->logical_blk_num) { printk(KERN_INFO "osst%d: Skipping frame, seq != logical\n", dev); return 0; } if (aux->frame_type != OS_FRAME_TYPE_DATA && aux->frame_type != OS_FRAME_TYPE_EOD && aux->frame_type != OS_FRAME_TYPE_MARKER) { if (!quiet) printk(KERN_INFO "osst%d: Skipping frame, frame type %x\n", dev, aux->frame_type); return 0; } if (aux->frame_type == OS_FRAME_TYPE_EOD && STp->first_frame_position < STp->eod_frame_ppos) { printk(KERN_INFO "osst%d: Skipping premature EOD frame %d\n", dev, STp->first_frame_position); return 0; } STp->logical_blk_in_buffer = 1; if (logical_blk_num != -1 && ntohl(aux->logical_blk_num) != logical_blk_num) { if (!quiet) printk(KERN_INFO "osst%d: Skipping frame, logical_blk_num %u (expected %d)\n", dev, ntohl(aux->logical_blk_num), logical_blk_num); return 0; } if (aux->frame_type == OS_FRAME_TYPE_MARKER) { STps->eof = ST_FM_HIT; i = ntohl(aux->filemark_cnt); if (STp->header_cache != NULL && i < OS_FM_TAB_MAX && (i > STp->filemark_cnt || STp->first_frame_position - 1 != ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i]))) { #if 1 //DEBUG printk(OSST_DEB_MSG "osst%i: %s filemark %d at frame %d\n", dev, STp->header_cache->dat_fm_tab.fm_tab_ent[i] == 0?"Learned":"Corrected", i, STp->first_frame_position - 1); #endif STp->header_cache->dat_fm_tab.fm_tab_ent[i] = htonl(STp->first_frame_position - 1); if (i >= STp->filemark_cnt) STp->filemark_cnt = i+1; } } if (aux->frame_type == OS_FRAME_TYPE_EOD) { STps->eof = ST_EOD_1; } if (aux->frame_type == OS_FRAME_TYPE_DATA) { STps->eof = ST_NOEOF; } return 1; } /* * Wait for the unit to become Ready */ static int osst_wait_ready(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned timeout) { unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt; long startwait = jiffies; #if DEBUG int dbg = debugging; int dev = TAPE_NR(STp->devt); printk(OSST_DEB_MSG "osst%d: Reached onstream wait ready\n", dev); #endif memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = TEST_UNIT_READY; SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); *aSRpnt = SRpnt; if (!SRpnt) return (-EBUSY); while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && SRpnt->sr_sense_buffer[2] == 2 && SRpnt->sr_sense_buffer[12] == 4 && (SRpnt->sr_sense_buffer[13] == 1 || SRpnt->sr_sense_buffer[13] == 8) ) { #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%d: Sleeping in onstream wait ready\n", dev); printk(OSST_DEB_MSG "osst%d: Turning off debugging for a while\n", dev); debugging = 0; } #endif current->state = TASK_INTERRUPTIBLE; schedule_timeout(HZ / 10); memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = TEST_UNIT_READY; SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); } *aSRpnt = SRpnt; #if DEBUG debugging = dbg; #endif if ( STp->buffer->syscall_result && osst_write_error_recovery(STp, aSRpnt, 0) ) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Abnormal exit from onstream wait ready\n", dev); printk(OSST_DEB_MSG "osst%d: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", dev, STp->buffer->syscall_result, SRpnt->sr_sense_buffer[0], SRpnt->sr_sense_buffer[2], SRpnt->sr_sense_buffer[12], SRpnt->sr_sense_buffer[13]); #endif return (-EIO); } #if DEBUG printk(OSST_DEB_MSG "osst%d: Normal exit from onstream wait ready\n", dev); #endif return 0; } static int osst_position_tape_and_confirm(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int frame) { int retval; osst_wait_ready(STp, aSRpnt, 15 * 60); /* TODO - can this catch a write error? */ retval = osst_set_frame_position(STp, aSRpnt, frame, 0); if (retval) return (retval); osst_wait_ready(STp, aSRpnt, 15 * 60); return (osst_get_frame_position(STp, aSRpnt)); } /* * Wait for write(s) to complete */ static int osst_flush_drive_buffer(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt; int result = 0; #if DEBUG int dev = TAPE_NR(STp->devt); printk(OSST_DEB_MSG "osst%d: Reached onstream flush drive buffer (write filemark)\n", dev); #endif memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = WRITE_FILEMARKS; cmd[1] = 1; SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_WRITE_RETRIES, TRUE); *aSRpnt = SRpnt; if (!SRpnt) return (-EBUSY); if ((STp->buffer)->syscall_result) result = osst_write_error_recovery(STp, aSRpnt, 0); result |= osst_wait_ready(STp, aSRpnt, 5 * 60); STp->ps[STp->partition].rw = ST_IDLE; return (result); } #define OSST_POLL_PER_SEC 10 static int osst_wait_frame(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int curr, int minlast, int to) { long startwait = jiffies; int dev = TAPE_NR(STp->devt); #if DEBUG char notyetprinted = 1; #endif if ((minlast >= 0 && STp->ps[STp->partition].rw != ST_READING) || (minlast < 0 && STp->ps[STp->partition].rw != ST_WRITING) ) printk(KERN_ERR "osst%i: waiting for frame without having initialized %s!\n", dev, minlast<0?"write":"read"); while (time_before (jiffies, startwait + to*HZ)) { int result; result = osst_get_frame_position (STp, aSRpnt); if (result == -EIO) if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0) return 0; /* successfull recovery leaves drive ready for frame */ if (result < 0) break; if (STp->first_frame_position == curr && ((minlast < 0 && (signed)STp->last_frame_position > (signed)curr + minlast) || (minlast >= 0 && STp->cur_frames > minlast) ) && result >= 0) { #if DEBUG if (debugging || jiffies - startwait >= 2*HZ/OSST_POLL_PER_SEC) printk (OSST_DEB_MSG "osst%i: Succ wait f fr %i (>%i): %i-%i %i (%i): %3li.%li s\n", dev, curr, curr+minlast, STp->first_frame_position, STp->last_frame_position, STp->cur_frames, result, (jiffies-startwait)/HZ, (((jiffies-startwait)%HZ)*10)/HZ); #endif return 0; } #if DEBUG if (jiffies - startwait >= 2*HZ/OSST_POLL_PER_SEC && notyetprinted) { printk (OSST_DEB_MSG "osst%i: Wait for frame %i (>%i): %i-%i %i (%i)\n", dev, curr, curr+minlast, STp->first_frame_position, STp->last_frame_position, STp->cur_frames, result); notyetprinted--; } #endif current->state = TASK_INTERRUPTIBLE; schedule_timeout (HZ / OSST_POLL_PER_SEC); } #if DEBUG printk (OSST_DEB_MSG "osst%i: Fail wait f fr %i (>%i): %i-%i %i: %3li.%li s\n", dev, curr, curr+minlast, STp->first_frame_position, STp->last_frame_position, STp->cur_frames, (jiffies-startwait)/HZ, (((jiffies-startwait)%HZ)*10)/HZ); #endif return -EBUSY; } /* * Read the next OnStream tape block at the current location */ static int osst_read_block(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int timeout) { unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt; int retval = 0; #if DEBUG os_aux_t * aux = STp->buffer->aux; int dev = TAPE_NR(STp->devt); #endif /* TODO: Error handling */ if (STp->poll) retval = osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout); #if 0// DEBUG printk ("osst_read: wait for frame returned %i\n", retval); #endif memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = READ_6; cmd[1] = 1; cmd[4] = 1; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%i: Reading block from OnStream tape\n", dev); #endif SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_READ, STp->timeout, MAX_RETRIES, TRUE); *aSRpnt = SRpnt; if (!SRpnt) return (-EBUSY); if ((STp->buffer)->syscall_result) { retval = 1; if (STp->read_error_frame == 0) { STp->read_error_frame = STp->first_frame_position; printk(OSST_DEB_MSG "osst: recording read error at %d\n", STp->read_error_frame);/*FIXME*/ } #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Sense: %2x %2x %2x %2x %2x %2x %2x %2x\n", dev, SRpnt->sr_sense_buffer[0], SRpnt->sr_sense_buffer[1], SRpnt->sr_sense_buffer[2], SRpnt->sr_sense_buffer[3], SRpnt->sr_sense_buffer[4], SRpnt->sr_sense_buffer[5], SRpnt->sr_sense_buffer[6], SRpnt->sr_sense_buffer[7]); #endif } else STp->first_frame_position++; #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%i: AUX: %c%c%c%c UpdFrCt#%d %s FrSeq#%d LogBlk#%d\n", dev, aux->application_sig[0], aux->application_sig[1], aux->application_sig[2], aux->application_sig[3], ntohl(aux->update_frame_cntr), aux->frame_type==1?"EOD":aux->frame_type==2?"MARK": aux->frame_type==8?"HEADR":aux->frame_type==0x80?"DATA":"FILL", ntohl(aux->frame_seq_num), ntohl(aux->logical_blk_num) ); if (aux->frame_type==2) printk(OSST_DEB_MSG "osst%i: mark_cnt=%d, last_mark=%d, next_mark=%d\n", dev, ntohl(aux->filemark_cnt), ntohl(aux->last_mark_ppos), ntohl(aux->next_mark_ppos)); printk(OSST_DEB_MSG "osst%i: Exit read block from OnStream tape with code %d\n", dev, retval); } #endif return (retval); } static int osst_initiate_read(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { ST_partstat * STps = &(STp->ps[STp->partition]); Scsi_Request * SRpnt ; unsigned char cmd[MAX_COMMAND_SIZE]; int retval = 0; #if DEBUG int dev = TAPE_NR(STp->devt); #endif if (STps->rw != ST_READING) { /* Initialize read operation */ if (STps->rw == ST_WRITING) { osst_flush_write_buffer(STp, aSRpnt, 1); osst_flush_drive_buffer(STp, aSRpnt); } STps->rw = ST_READING; STp->logical_blk_in_buffer = 0; /* * Issue a read 0 command to get the OnStream drive * read blocks into its buffer. */ memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = READ_6; cmd[1] = 1; #if DEBUG printk(OSST_DEB_MSG "osst%i: Start Read Ahead on OnStream tape\n", dev); #endif SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_RETRIES, TRUE); *aSRpnt = SRpnt; retval = STp->buffer->syscall_result; } return retval; } static int osst_get_logical_blk(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int logical_blk_num, int quiet) { ST_partstat * STps = &(STp->ps[STp->partition]); int dev = TAPE_NR(STp->devt); int cnt = 0, bad = 0, past = 0, x, position; /* * Search and wait for the next logical tape block */ while (1) { if (cnt++ > 400) { printk(KERN_WARNING "osst%d: Couldn't find logical block %d, aborting\n", dev, logical_blk_num); if (STp->read_error_frame) { osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0); #if 1 //DEBUG printk(OSST_DEB_MSG "osst%d: Repositioning tape to bad block %d\n", dev, STp->read_error_frame); #endif STp->read_error_frame = 0; } return (-EIO); } #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Looking for block %d, attempt %d\n", dev, logical_blk_num, cnt); #endif if ( osst_initiate_read(STp, aSRpnt) || ( (!STp->logical_blk_in_buffer) && osst_read_block(STp, aSRpnt, 30) ) ) { position = osst_get_frame_position(STp, aSRpnt); if (position >= 0xbae && position < 0xbb8) position = 0xbb8; else if (position > STp->eod_frame_ppos || ++bad == 10) { printk(OSST_DEB_MSG "osst%d: start again from pos %d, eod %d, bad %d\n", dev, position, STp->eod_frame_ppos, bad); /*FIXME*/ position = STp->read_error_frame - 1; } else { position += 39; cnt += 20; } #if DEBUG printk(OSST_DEB_MSG "osst%d: Bad block detected, positioning tape to block %d\n", dev, position); #endif osst_set_frame_position(STp, aSRpnt, position, 0); continue; } if (osst_verify_frame(STp, logical_blk_num, quiet)) break; if (osst_verify_frame(STp, -1, quiet)) { x = ntohl(STp->buffer->aux->logical_blk_num); if (STp->fast_open) { #if 1 //DEBUG printk(OSST_DEB_MSG "osst%d: Found logical block %d instead of %d after fast open\n", dev, x, logical_blk_num); #endif STp->header_ok = 0; STp->read_error_frame = 0; return (-EIO); } if (x > logical_blk_num) { if (++past > 3) { /* positioning backwards did not bring us to the desired block */ position = STp->read_error_frame - 1; } else position = osst_get_frame_position(STp, aSRpnt) + logical_blk_num - x - 1; #if 1 //DEBUG printk(OSST_DEB_MSG "osst%d: Found logical block %d while looking for %d: back up %d\n", dev, x, logical_blk_num, STp->first_frame_position - position); #endif osst_set_frame_position(STp, aSRpnt, position, 0); cnt += 10; } else past = 0; } if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Skipping config partition\n", dev); #endif osst_set_frame_position(STp, aSRpnt, 0xbb8, 0); cnt--; } STp->logical_blk_in_buffer = 0; } if (cnt > 1) { STp->recover_count++; STp->recover_erreg++; } STp->logical_blk_num = ntohl(STp->buffer->aux->logical_blk_num); #if DEBUG if (debugging || STps->eof) printk(OSST_DEB_MSG "osst%i: Exit get logical block (%d=>%d) from OnStream tape with code %d\n", dev, logical_blk_num, STp->logical_blk_num, STps->eof); #endif STp->fast_open = FALSE; STp->read_error_frame = 0; return (STps->eof); } static int osst_seek_logical_blk(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int logical_blk_num) { int estimate; int retries = 0; int dev = TAPE_NR(STp->devt); if (logical_blk_num < 0) logical_blk_num = 0; /* FIXME -- this may not be valid for foreign formats */ if (logical_blk_num < 2980) estimate = logical_blk_num + 10; else estimate = logical_blk_num + 20; #if DEBUG printk(OSST_DEB_MSG "osst%d: Seeking logical block %d (now at %d)\n", dev, logical_blk_num, STp->logical_blk_num); #endif while (++retries < 10) { osst_set_frame_position(STp, aSRpnt, estimate, 0); if (osst_get_logical_blk(STp, aSRpnt, logical_blk_num, 1) >= 0) return 0; if (osst_get_logical_blk(STp, aSRpnt, -1, 1) < 0) goto error; if (STp->logical_blk_num != logical_blk_num) estimate += logical_blk_num - STp->logical_blk_num; else break; } error: printk(KERN_WARNING "osst%d: Couldn't seek to logical block %d (at %d), %d retries\n", dev, logical_blk_num, STp->logical_blk_num, retries); return (-EIO); } static int osst_seek_frame(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int frame) { ST_partstat * STps = &(STp->ps[STp->partition]); int r; if (frame < 0 || frame >= STp->capacity) return (-ENXIO); if (frame <= STp->first_data_ppos) { STp->logical_blk_num = STps->drv_file = STps->drv_block = 0; return (osst_set_frame_position(STp, aSRpnt, frame, 0)); } r = osst_set_frame_position(STp, aSRpnt, frame-1, 0); if (r < 0) return r; r = osst_get_logical_blk(STp, aSRpnt, -1, 1); if (r < 0) return r; if (osst_get_frame_position(STp, aSRpnt) != frame) return (-EIO); STp->logical_blk_num++; STp->logical_blk_in_buffer = 0; STps->drv_file = htonl(STp->buffer->aux->filemark_cnt); STps->drv_block = -1; STps->eof = ST_NOEOF; return 0; } /* * Read back the drive's internal buffer contents, as a part * of the write error recovery mechanism for old OnStream * firmware revisions. */ static int osst_read_back_buffer_and_rewrite(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned int block, unsigned int skip, int pending) { Scsi_Request * SRpnt = * aSRpnt; unsigned char * buffer, * p; unsigned char cmd[MAX_COMMAND_SIZE]; int frames, flag, new_block, i, logical_blk_num; int dev = TAPE_NR(STp->devt); long startwait = jiffies; #if DEBUG int dbg = debugging; #endif frames = STp->cur_frames; if ((buffer = (unsigned char *)vmalloc((frames + pending) * OS_DATA_SIZE)) == NULL) return (-EIO); logical_blk_num = STp->logical_blk_num - frames - pending; printk(KERN_INFO "osst%d: Reading back %d frames from drive buffer%s\n", dev, frames, pending?" and one that was pending":""); if (pending) { osst_copy_from_buffer(STp->buffer, (p = &buffer[frames * OS_DATA_SIZE])); // memcpy((p = &buffer[frames * OS_DATA_SIZE]), STp->buffer->b_data, OS_DATA_SIZE); #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Pending logical block %d, data %x %x %x %x\n", dev, logical_blk_num + frames, p[0], p[1], p[2], p[3]); #endif } for (i = 0, p = buffer; i < frames; i++, p += OS_DATA_SIZE) { memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = 0x3C; /* Buffer Read */ cmd[1] = 6; /* Retrieve Faulty Block */ cmd[7] = 32768 >> 8; cmd[8] = 32768 & 0xff; SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_READ, STp->timeout, MAX_RETRIES, TRUE); if ((STp->buffer)->syscall_result) { printk(KERN_ERR "osst%d: Failed to read block back from OnStream buffer\n", dev); vfree((void *)buffer); *aSRpnt = SRpnt; return (-EIO); } osst_copy_from_buffer(STp->buffer, p); // memcpy(p, STp->buffer->b_data, OS_DATA_SIZE); #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Read back logical block %d, data %x %x %x %x\n", dev, logical_blk_num + i, p[0], p[1], p[2], p[3]); #endif } *aSRpnt = SRpnt; osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%d: Frames left in buffer: %d\n", dev, STp->cur_frames); #endif /* Write synchronously so we can be sure we're OK again and don't have to recover recursively */ /* In the header we don't actually re-write the blocks that fail, just the ones after them */ for (flag=1, new_block=block, p=buffer, i=0; i < frames + pending; ) { if (flag) { if (STp->write_type == OS_WRITE_HEADER) { i += skip; p += skip * OS_DATA_SIZE; } else if (new_block < 2990 && new_block+skip+frames+pending >= 2990) new_block = 3000-i; else new_block += skip; #if DEBUG printk(OSST_DEB_MSG "osst%d: Position to frame %d, write lblk %d\n", dev, new_block+i, logical_blk_num+i); /* FIXME var blk sz */ #endif osst_set_frame_position(STp, aSRpnt, new_block + i, 0); osst_wait_ready(STp, aSRpnt, 60); osst_get_frame_position(STp, aSRpnt); SRpnt = * aSRpnt; if (new_block > block + 1000) { printk(KERN_ERR "osst%d: Failed to find valid tape media\n", dev); vfree((void *)buffer); return (-EIO); } flag = 0; if ( i >= frames + pending ) break; } osst_copy_to_buffer(STp->buffer, p); // memcpy(STp->buffer->b_data, p, OS_DATA_SIZE); /* * IMPORTANT: for error recovery to work, _never_ queue frames with mixed frame type! */ osst_init_aux(STp, STp->buffer->aux->frame_type, logical_blk_num+i ); memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = WRITE_6; cmd[1] = 1; cmd[4] = 1; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: About to attempt to write to frame %d\n", dev, new_block+i); #endif SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_WRITE, STp->timeout, MAX_WRITE_RETRIES, TRUE); if (STp->buffer->syscall_result) flag = 1; else { p += OS_DATA_SIZE; i++; /* if we just sent the last frame, wait till all successfully written */ if ( i == frames + pending ) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Check re-write successful\n", dev); #endif memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = WRITE_FILEMARKS; cmd[1] = 1; SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_WRITE_RETRIES, TRUE); #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%d: Sleeping in re-write wait ready\n", dev); printk(OSST_DEB_MSG "osst%d: Turning off debugging for a while\n", dev); debugging = 0; } #endif flag = STp->buffer->syscall_result; while ( !flag && time_before(jiffies, startwait + 60*HZ) ) { memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = TEST_UNIT_READY; SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); if (SRpnt->sr_sense_buffer[2] == 2 && SRpnt->sr_sense_buffer[12] == 4 && (SRpnt->sr_sense_buffer[13] == 1 || SRpnt->sr_sense_buffer[13] == 8)) { /* in the process of becoming ready */ schedule_timeout(HZ / 10); continue; } if (STp->buffer->syscall_result) flag = 1; break; } #if DEBUG debugging = dbg; printk(OSST_DEB_MSG "osst%d: Wait re-write finished\n", dev); #endif } } if (flag) { if ((SRpnt->sr_sense_buffer[ 2] & 0x0f) == 13 && SRpnt->sr_sense_buffer[12] == 0 && SRpnt->sr_sense_buffer[13] == 2) { printk(KERN_ERR "osst%d: Volume overflow in write error recovery\n", dev); vfree((void *)buffer); return (-EIO); /* hit end of tape = fail */ } i = ((SRpnt->sr_sense_buffer[3] << 24) | (SRpnt->sr_sense_buffer[4] << 16) | (SRpnt->sr_sense_buffer[5] << 8) | SRpnt->sr_sense_buffer[6] ) - new_block; p = &buffer[i * OS_DATA_SIZE]; #if DEBUG printk(OSST_DEB_MSG "osst%d: Additional write error at %d\n", dev, new_block+i); #endif osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%d: reported frame positions: host = %d, tape = %d\n", dev, STp->first_frame_position, STp->last_frame_position); #endif } *aSRpnt = SRpnt; } vfree((void *)buffer); return 0; } static int osst_reposition_and_retry(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned int block, unsigned int skip, int pending) { unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt = * aSRpnt; int dev = TAPE_NR(STp->devt); int attempts = 1000 / skip; int flag = 1; long startwait = jiffies; #if DEBUG int dbg = debugging; #endif while (attempts && time_before(jiffies, startwait + 60*HZ)) { if (flag) { #if DEBUG debugging = dbg; #endif if (block < 2990 && block+skip+STp->cur_frames+pending >= 2990) block = 3000-skip; #if DEBUG printk(OSST_DEB_MSG "osst%d: Position to frame %d, re-write from lblk %d\n", dev, block+skip, STp->logical_blk_num-STp->cur_frames-pending); #endif osst_set_frame_position(STp, aSRpnt, block + skip, 1); flag = 0; attempts--; } if (osst_get_frame_position(STp, aSRpnt) < 0) { /* additional write error */ #if DEBUG printk(OSST_DEB_MSG "osst%d: Addl error, host %d, tape %d, buffer %d\n", dev, STp->first_frame_position, STp->last_frame_position, STp->cur_frames); #endif block = STp->last_frame_position; flag = 1; continue; } if (pending && STp->cur_frames < 50) { memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = WRITE_6; cmd[1] = 1; cmd[4] = 1; #if DEBUG printk(OSST_DEB_MSG "osst%d: About to write pending lblk %d at frame %d\n", dev, STp->logical_blk_num-1, STp->first_frame_position); #endif SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_WRITE, STp->timeout, MAX_WRITE_RETRIES, TRUE); *aSRpnt = SRpnt; if (STp->buffer->syscall_result) { /* additional write error */ if ((SRpnt->sr_sense_buffer[ 2] & 0x0f) == 13 && SRpnt->sr_sense_buffer[12] == 0 && SRpnt->sr_sense_buffer[13] == 2) { printk(OSST_DEB_MSG "osst%d: Volume overflow in write error recovery\n", dev); break; /* hit end of tape = fail */ } flag = 1; } else pending = 0; continue; } if (STp->cur_frames == 0) { #if DEBUG debugging = dbg; printk(OSST_DEB_MSG "osst%d: Wait re-write finished\n", dev); #endif return 0; } #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%d: Sleeping in re-write wait ready\n", dev); printk(OSST_DEB_MSG "osst%d: Turning off debugging for a while\n", dev); debugging = 0; } #endif schedule_timeout(HZ / 10); } printk(KERN_ERR "osst%d: Failed to find valid tape media\n", dev); #if DEBUG debugging = dbg; #endif return (-EIO); } /* * Error recovery algorithm for the OnStream tape. */ static int osst_write_error_recovery(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int pending) { Scsi_Request * SRpnt = * aSRpnt; ST_partstat * STps = & STp->ps[STp->partition]; int dev = TAPE_NR(STp->devt); int retval = 0; int rw_state; unsigned int block, skip; rw_state = STps->rw; if ((SRpnt->sr_sense_buffer[ 2] & 0x0f) != 3 || SRpnt->sr_sense_buffer[12] != 12 || SRpnt->sr_sense_buffer[13] != 0) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Write error recovery cannot handle %02x:%02x:%02x\n", dev, SRpnt->sr_sense_buffer[2], SRpnt->sr_sense_buffer[12], SRpnt->sr_sense_buffer[13]); #endif return (-EIO); } block = (SRpnt->sr_sense_buffer[3] << 24) | (SRpnt->sr_sense_buffer[4] << 16) | (SRpnt->sr_sense_buffer[5] << 8) | SRpnt->sr_sense_buffer[6]; skip = SRpnt->sr_sense_buffer[9]; #if DEBUG printk(OSST_DEB_MSG "osst%d: Detected physical bad block at %u, advised to skip %d\n", dev, block, skip); #endif osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%d: reported frame positions: host = %d, tape = %d\n", dev, STp->first_frame_position, STp->last_frame_position); #endif switch (STp->write_type) { case OS_WRITE_DATA: case OS_WRITE_EOD: case OS_WRITE_NEW_MARK: printk(KERN_WARNING "osst%d: Relocating %d buffered logical blocks to physical block %u\n", dev, STp->cur_frames, block + skip); if (STp->os_fw_rev >= 10600) retval = osst_reposition_and_retry(STp, aSRpnt, block, skip, pending); else retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, block, skip, pending); break; case OS_WRITE_LAST_MARK: printk(KERN_ERR "osst%d: Bad block in update last marker, fatal\n", dev); osst_set_frame_position(STp, aSRpnt, block + STp->cur_frames + pending, 0); retval = -EIO; break; case OS_WRITE_HEADER: printk(KERN_WARNING "osst%d: Bad block in header partition, skipped\n", dev); retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, block, 1, pending); break; default: printk(KERN_WARNING "osst%d: Bad block in filler, ignored\n", dev); osst_set_frame_position(STp, aSRpnt, block + STp->cur_frames + pending, 0); } osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(KERN_ERR "osst%d: Positioning complete, cur_frames %d, pos %d, tape pos %d\n", dev, STp->cur_frames, STp->first_frame_position, STp->last_frame_position); printk(OSST_DEB_MSG "osst%d: next logical block to write: %d\n", dev, STp->logical_blk_num); #endif if (retval == 0) { STp->recover_count++; STp->recover_erreg++; } STps->rw = rw_state; return retval; } static int osst_space_over_filemarks_backward(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int mt_op, int mt_count) { int dev = TAPE_NR(STp->devt); int cnt; int last_mark_ppos = -1; #if DEBUG printk(OSST_DEB_MSG "osst%d: Reached space_over_filemarks_backwards %d %d\n", dev, mt_op, mt_count); #endif if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks_bwd\n", dev); return -EIO; } if (STp->linux_media_version >= 4) { /* * direct lookup in header filemark list */ cnt = ntohl(STp->buffer->aux->filemark_cnt); if (STp->header_ok && STp->header_cache != NULL && (cnt - mt_count) >= 0 && (cnt - mt_count) < OS_FM_TAB_MAX && (cnt - mt_count) < STp->filemark_cnt && STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == STp->buffer->aux->last_mark_ppos) last_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt - mt_count]); #if 1 //DEBUG if (STp->header_cache == NULL || (cnt - mt_count) < 0 || (cnt - mt_count) >= OS_FM_TAB_MAX) printk(OSST_DEB_MSG "osst%i: Filemark lookup fail due to %s\n", dev, STp->header_cache == NULL?"lack of header cache":"count out of range"); else printk(OSST_DEB_MSG "osst%i: Filemark lookup: prev mark %d (%s), skip %d to %d\n", dev, cnt, ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == STp->buffer->aux->last_mark_ppos))?"match":"error", mt_count, last_mark_ppos); #endif if (last_mark_ppos > 10 && last_mark_ppos < STp->eod_frame_ppos) { osst_set_frame_position(STp, aSRpnt, last_mark_ppos, 0); if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks\n", dev); return (-EIO); } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { printk(KERN_INFO "osst%i: Expected to find marker at block %d, not found\n", dev, last_mark_ppos); return (-EIO); } if (mt_op == MTBSFM) { STp->logical_blk_num++; STp->logical_blk_in_buffer = 0; } return 0; } printk(KERN_INFO "osst%i: Reverting to scan filemark backwards\n", dev); } cnt = 0; while (cnt != mt_count) { last_mark_ppos = ntohl(STp->buffer->aux->last_mark_ppos); if (last_mark_ppos == -1) return (-EIO); #if DEBUG printk(OSST_DEB_MSG "osst%i: Positioning to last mark at %d\n", dev, last_mark_ppos); #endif osst_set_frame_position(STp, aSRpnt, last_mark_ppos, 0); cnt++; if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks\n", dev); return (-EIO); } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { printk(KERN_INFO "osst%i: Expected to find marker at block %d, not found\n", dev, last_mark_ppos); return (-EIO); } } if (mt_op == MTBSFM) { STp->logical_blk_num++; STp->logical_blk_in_buffer = 0; } return 0; } /* * ADRL 1.1 compatible "slow" space filemarks fwd version * * Just scans for the filemark sequentially. */ static int osst_space_over_filemarks_forward_slow(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int mt_op, int mt_count) { int dev = TAPE_NR(STp->devt); int cnt = 0; #if DEBUG printk(OSST_DEB_MSG "osst%d: Reached space_over_filemarks_forward_slow %d %d\n", dev, mt_op, mt_count); #endif if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks_fwd\n", dev); return (-EIO); } while (1) { if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks\n", dev); return (-EIO); } if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER) cnt++; if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) { #if DEBUG printk(OSST_DEB_MSG "osst%i: space_fwd: EOD reached\n", dev); #endif if (STp->first_frame_position > STp->eod_frame_ppos+1) { #if DEBUG printk(OSST_DEB_MSG "osst%i: EOD position corrected (%d=>%d)\n", dev, STp->eod_frame_ppos, STp->first_frame_position-1); #endif STp->eod_frame_ppos = STp->first_frame_position-1; } return (-EIO); } if (cnt == mt_count) break; STp->logical_blk_in_buffer = 0; } if (mt_op == MTFSF) { STp->logical_blk_num++; STp->logical_blk_in_buffer = 0; } return 0; } /* * Fast linux specific version of OnStream FSF */ static int osst_space_over_filemarks_forward_fast(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int mt_op, int mt_count) { int dev = TAPE_NR(STp->devt); int cnt = 0, next_mark_ppos = -1; #if DEBUG printk(OSST_DEB_MSG "osst%d: Reached space_over_filemarks_forward_fast %d %d\n", dev, mt_op, mt_count); #endif if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks_fwd\n", dev); return (-EIO); } if (STp->linux_media_version >= 4) { /* * direct lookup in header filemark list */ cnt = ntohl(STp->buffer->aux->filemark_cnt) - 1; if (STp->header_ok && STp->header_cache != NULL && (cnt + mt_count) < OS_FM_TAB_MAX && (cnt + mt_count) < STp->filemark_cnt && ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == STp->buffer->aux->last_mark_ppos))) next_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt + mt_count]); #if 1 //DEBUG if (STp->header_cache == NULL || (cnt + mt_count) >= OS_FM_TAB_MAX) printk(OSST_DEB_MSG "osst%i: Filemark lookup fail due to %s\n", dev, STp->header_cache == NULL?"lack of header cache":"count out of range"); else printk(OSST_DEB_MSG "osst%i: Filemark lookup: prev mark %d (%s), skip %d to %d\n", dev, cnt, ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) || (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == STp->buffer->aux->last_mark_ppos))?"match":"error", mt_count, next_mark_ppos); #endif if (next_mark_ppos <= 10 || next_mark_ppos > STp->eod_frame_ppos) { printk(KERN_INFO "osst%i: Reverting to slow filemark space\n", dev); return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); } else { osst_set_frame_position(STp, aSRpnt, next_mark_ppos, 0); if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks\n", dev); return (-EIO); } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { printk(KERN_INFO "osst%i: Expected to find marker at block %d, not found\n", dev, next_mark_ppos); return (-EIO); } if (ntohl(STp->buffer->aux->filemark_cnt) != cnt + mt_count) { printk(KERN_INFO "osst%i: Expected to find marker %d at block %d, not %d\n", dev, cnt+mt_count, next_mark_ppos, ntohl(STp->buffer->aux->filemark_cnt)); return (-EIO); } } } else { /* * Find nearest (usually previous) marker, then jump from marker to marker */ while (1) { if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER) break; if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) { #if DEBUG printk(OSST_DEB_MSG "osst%i: space_fwd: EOD reached\n", dev); #endif return (-EIO); } if (ntohl(STp->buffer->aux->filemark_cnt) == 0) { if (STp->first_mark_ppos == -1) { printk(KERN_INFO "osst%i: Reverting to slow filemark space\n", dev); return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); } osst_set_frame_position(STp, aSRpnt, STp->first_mark_ppos, 0); if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks_fwd_fast\n", dev); return (-EIO); } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { printk(KERN_INFO "osst%i: Expected to find filemark at %d\n", dev, STp->first_mark_ppos); return (-EIO); } } else { if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0) return (-EIO); mt_count++; } } cnt++; while (cnt != mt_count) { next_mark_ppos = ntohl(STp->buffer->aux->next_mark_ppos); if (!next_mark_ppos || next_mark_ppos > STp->eod_frame_ppos) { printk(KERN_INFO "osst%i: Reverting to slow filemark space\n", dev); return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt); } #if DEBUG else printk(OSST_DEB_MSG "osst%i: Positioning to next mark at %d\n", dev, next_mark_ppos); #endif osst_set_frame_position(STp, aSRpnt, next_mark_ppos, 0); cnt++; if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { printk(KERN_INFO "osst%i: Couldn't get logical blk num in space_filemarks\n", dev); return (-EIO); } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { printk(KERN_INFO "osst%i: Expected to find marker at block %d, not found\n", dev, next_mark_ppos); return (-EIO); } } } if (mt_op == MTFSF) STp->logical_blk_num++; STp->logical_blk_in_buffer = 0; return 0; } /* * In debug mode, we want to see as many errors as possible * to test the error recovery mechanism. */ #if DEBUG static void osst_set_retries(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int retries) { unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt = * aSRpnt; int dev = TAPE_NR(STp->devt); memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SELECT; cmd[1] = 0x10; cmd[4] = NUMBER_RETRIES_PAGE_LENGTH + MODE_HEADER_LENGTH; (STp->buffer)->b_data[0] = cmd[4] - 1; (STp->buffer)->b_data[1] = 0; /* Medium Type - ignoring */ (STp->buffer)->b_data[2] = 0; /* Reserved */ (STp->buffer)->b_data[3] = 0; /* Block Descriptor Length */ (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = NUMBER_RETRIES_PAGE | (1 << 7); (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 2; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 4; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = retries; if (debugging) printk(OSST_DEB_MSG "osst%i: Setting number of retries on OnStream tape to %d\n", dev, retries); SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_WRITE, STp->timeout, 0, TRUE); *aSRpnt = SRpnt; if ((STp->buffer)->syscall_result) printk (KERN_ERR "osst%d: Couldn't set retries to %d\n", dev, retries); } #endif #if 0 static void osst_update_markers(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int last_mark_ppos, int this_mark_ppos) { int dev = TAPE_NR(STp->devt); int frame, reslt; if (STp->raw) return; STp->last_mark_ppos = this_mark_ppos; if (STp->header_cache != NULL && STp->filemark_cnt < OS_FM_TAB_MAX) STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt] = htonl(this_mark_ppos); if (STp->filemark_cnt++ == 0) STp->first_mark_ppos = this_mark_ppos; if (STp->linux_media_version >= 4) return; if (last_mark_ppos == -1) return; STp->write_type = OS_WRITE_LAST_MARK; frame = osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%i: Update last_marker at frame %d\n", dev, last_mark_addr); printk(OSST_DEB_MSG "osst%i: current position %d, lblk %d, tape blk %d\n", dev, frame, STp->logical_blk_num, STp->last_frame_position); #endif osst_set_frame_position(STp, aSRpnt, last_mark_ppos, 0); osst_initiate_read (STp, aSRpnt); reslt = osst_read_block(STp, aSRpnt, 180); if (reslt) { printk(KERN_WARNING "osst%i: couldn't read last marker\n", dev); osst_set_frame_position(STp, aSRpnt, frame, 0); return; } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { printk(KERN_WARNING "osst%i: expected marker at addr %d\n", dev, last_mark_ppos); osst_set_frame_position(STp, aSRpnt, frame, 0); return; } #if DEBUG printk(OSST_DEB_MSG "osst%i: writing back marker\n", dev); #endif STp->buffer->aux->next_mark_ppos = htonl(this_mark_ppos); osst_set_frame_position(STp, aSRpnt, last_mark_ppos, 0); STp->dirty = 1; if (osst_flush_write_buffer(STp, aSRpnt, 0) || osst_flush_drive_buffer(STp, aSRpnt) ) { printk(KERN_WARNING "osst%i: couldn't write marker back at addr %d\n", dev, last_mark_ppos); } osst_set_frame_position(STp, aSRpnt, frame, 0); return; /* FIXME -- errors should go back to user space */ } #endif static int osst_write_filemark(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { int result; int this_mark_ppos; #if DEBUG int dev = TAPE_NR(STp->devt); #endif if (STp->raw) return 0; STp->write_type = OS_WRITE_NEW_MARK; this_mark_ppos = osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%i: Writing Filemark %i at frame %d (lblk %d)\n", dev, STp->filemark_cnt, this_mark_ppos, STp->logical_blk_num); #endif osst_init_aux(STp, OS_FRAME_TYPE_MARKER, STp->logical_blk_num++); STp->ps[STp->partition].rw = ST_WRITING; STp->dirty = 1; result = osst_flush_write_buffer(STp, aSRpnt, 0); result |= osst_flush_drive_buffer(STp, aSRpnt); STp->last_mark_ppos = this_mark_ppos; if (STp->header_cache != NULL && STp->filemark_cnt < OS_FM_TAB_MAX) STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt] = htonl(this_mark_ppos); if (STp->filemark_cnt++ == 0) STp->first_mark_ppos = this_mark_ppos; // osst_update_markers(STp, aSRpnt, STp->last_mark_addr, this_mark_addr); return result; } static int osst_write_eod(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { int result; #if DEBUG int dev = TAPE_NR(STp->devt); #endif if (STp->raw) return 0; STp->write_type = OS_WRITE_EOD; STp->eod_frame_ppos = osst_get_frame_position(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%i: Writing EOD at %d=>%d\n", dev, STp->logical_blk_num, STp->eod_frame_ppos); #endif osst_init_aux(STp, OS_FRAME_TYPE_EOD, STp->logical_blk_num++); STp->ps[STp->partition].rw = ST_WRITING; STp->dirty = 1; result = osst_flush_write_buffer(STp, aSRpnt, 0); result |= osst_flush_drive_buffer(STp, aSRpnt); STp->eod_frame_lfa = --(STp->logical_blk_num); return result; } static int osst_write_filler(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int block, int count) { int dev = TAPE_NR(STp->devt); #if DEBUG printk(OSST_DEB_MSG "osst%i: Reached onstream write filler group %d\n", dev, block); #endif osst_wait_ready(STp, aSRpnt, 60 * 5); osst_set_frame_position(STp, aSRpnt, block, 0); STp->write_type = OS_WRITE_FILLER; osst_init_aux(STp, OS_FRAME_TYPE_FILL, 0); while (count--) { memcpy(STp->buffer->b_data, "Filler", 6); STp->buffer->buffer_bytes = 6; STp->dirty = 1; if (osst_flush_write_buffer(STp, aSRpnt, 0)) { printk(KERN_INFO "osst%i: Couldn't write filler frame\n", dev); return (-EIO); } } #if DEBUG printk(OSST_DEB_MSG "osst%i: Exiting onstream write filler group\n", dev); #endif return osst_flush_drive_buffer(STp, aSRpnt); } static int __osst_write_header(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int block, int count) { int dev = TAPE_NR(STp->devt); int result; #if DEBUG printk(OSST_DEB_MSG "osst%i: Reached onstream write header group %d\n", dev, block); #endif osst_wait_ready(STp, aSRpnt, 60 * 5); osst_set_frame_position(STp, aSRpnt, block, 0); STp->write_type = OS_WRITE_HEADER; STp->ps[STp->partition].rw = ST_WRITING; osst_init_aux(STp, OS_FRAME_TYPE_HEADER, STp->logical_blk_num); while (count--) { osst_copy_to_buffer(STp->buffer, (unsigned char *)STp->header_cache); STp->buffer->buffer_bytes = sizeof(os_header_t); STp->dirty = 1; if (osst_flush_write_buffer(STp, aSRpnt, 0)) { printk(KERN_INFO "osst%i: Couldn't write header frame\n", dev); return (-EIO); } } result = osst_flush_drive_buffer(STp, aSRpnt); #if DEBUG printk(OSST_DEB_MSG "osst%i: Write onstream header group %s\n", dev, result?"failed":"done"); #endif return result; } static int osst_write_header(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int locate_eod) { os_header_t * header; int result; int dev = TAPE_NR(STp->devt); #if DEBUG printk(OSST_DEB_MSG "osst%i: Writing tape header\n", dev); #endif if (STp->raw) return 0; if (STp->header_cache == NULL) { if ((STp->header_cache = (os_header_t *)vmalloc(sizeof(os_header_t))) == NULL) { printk(KERN_ERR "osst%i: Failed to allocate header cache\n", dev); return (-ENOMEM); } memset(STp->header_cache, 0, sizeof(os_header_t)); #if DEBUG printk(OSST_DEB_MSG "osst%d: Allocated and cleared memory for header cache\n", dev); #endif } if (STp->header_ok) STp->update_frame_cntr++; else STp->update_frame_cntr = 0; header = STp->header_cache; strcpy(header->ident_str, "ADR_SEQ"); header->major_rev = 1; header->minor_rev = 4; header->ext_trk_tb_off = htons(17192); header->pt_par_num = 1; header->partition[0].partition_num = OS_DATA_PARTITION; header->partition[0].par_desc_ver = OS_PARTITION_VERSION; header->partition[0].wrt_pass_cntr = htons(STp->wrt_pass_cntr); header->partition[0].first_frame_ppos = htonl(STp->first_data_ppos); header->partition[0].last_frame_ppos = htonl(STp->capacity); header->partition[0].eod_frame_ppos = htonl(STp->eod_frame_ppos); header->cfg_col_width = htonl(20); header->dat_col_width = htonl(1500); header->qfa_col_width = htonl(0); header->ext_track_tb.nr_stream_part = 1; header->ext_track_tb.et_ent_sz = 32; header->ext_track_tb.dat_ext_trk_ey.et_part_num = 0; header->ext_track_tb.dat_ext_trk_ey.fmt = 1; header->ext_track_tb.dat_ext_trk_ey.fm_tab_off = htons(17736); header->ext_track_tb.dat_ext_trk_ey.last_hlb_hi = 0; header->ext_track_tb.dat_ext_trk_ey.last_hlb = htonl(STp->eod_frame_lfa); header->ext_track_tb.dat_ext_trk_ey.last_pp = htonl(STp->eod_frame_ppos); header->dat_fm_tab.fm_part_num = 0; header->dat_fm_tab.fm_tab_ent_sz = 4; header->dat_fm_tab.fm_tab_ent_cnt = htons(STp->filemark_cntfilemark_cnt:OS_FM_TAB_MAX); result = __osst_write_header(STp, aSRpnt, 0xbae, 5); if (STp->update_frame_cntr == 0) osst_write_filler(STp, aSRpnt, 0xbb3, 5); result &= __osst_write_header(STp, aSRpnt, 5, 5); if (locate_eod) { #if DEBUG printk(OSST_DEB_MSG "osst%i: locating back to eod frame addr %d\n", dev, STp->eod_frame_ppos); #endif osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0); } if (result) printk(KERN_WARNING "osst%i: write header failed\n", dev); else { memcpy(STp->application_sig, "LIN4", 4); STp->linux_media = 1; STp->linux_media_version = 4; STp->header_ok = 1; } return result; } static int osst_reset_header(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { if (STp->header_cache != NULL) memset(STp->header_cache, 0, sizeof(os_header_t)); STp->logical_blk_num = 0; STp->logical_blk_in_buffer = 0; STp->eod_frame_ppos = STp->first_data_ppos = 0x0000000A; STp->filemark_cnt = 0; STp->first_mark_ppos = STp->last_mark_ppos = -1; return osst_write_header(STp, aSRpnt, 1); } static int __osst_analyze_headers(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int block) { int dev = TAPE_NR(STp->devt); os_header_t * header; os_aux_t * aux; char id_string[8]; int linux_media_version, update_frame_cntr; if (STp->raw) return 1; if (block == 5 || block == 0xbae || STp->buffer->syscall_result) { if (osst_set_frame_position(STp, aSRpnt, block, 0)) printk(KERN_WARNING "osst%i: Couldn't position tape\n", dev); if (osst_initiate_read (STp, aSRpnt)) { printk(KERN_WARNING "osst%i: Couldn't initiate read\n", dev); return 0; } } if (osst_read_block(STp, aSRpnt, 180)) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Couldn't read header frame\n", dev); #endif return 0; } header = (os_header_t *) STp->buffer->b_data; /* warning: only first segment addressable */ aux = STp->buffer->aux; if (aux->frame_type != OS_FRAME_TYPE_HEADER) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Skipping non-header frame (%d)\n", dev, block); #endif return 0; } if (strncmp(header->ident_str, "ADR_SEQ", 7) != 0 && strncmp(header->ident_str, "ADR-SEQ", 7) != 0) { strncpy(id_string, header->ident_str, 7); id_string[7] = 0; printk(KERN_INFO "osst%i: Invalid header identification string %s\n", dev, id_string); return 0; } update_frame_cntr = ntohl(aux->update_frame_cntr); if (update_frame_cntr < STp->update_frame_cntr) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Skipping frame %d with update_frame_counter %d<%d\n", dev, block, update_frame_cntr, STp->update_frame_cntr); #endif return 0; } if (header->major_rev != 1 || header->minor_rev != 4 ) { printk(KERN_INFO "osst%i: %s revision %d.%d detected (1.4 supported)\n", dev, (header->major_rev != 1 || header->minor_rev < 2 || header->minor_rev > 4 )? "Invalid" : "Warning:", header->major_rev, header->minor_rev); if (header->major_rev != 1 || header->minor_rev < 2 || header->minor_rev > 4) return 0; } if (header->pt_par_num != 1) printk(KERN_INFO "osst%i: Warning: %d partitions defined, only one supported\n", dev, header->pt_par_num); memcpy(id_string, aux->application_sig, 4); id_string[4] = 0; if (memcmp(id_string, "LIN", 3) == 0) { STp->linux_media = 1; linux_media_version = id_string[3] - '0'; if (linux_media_version != 4) printk(KERN_INFO "osst%i: Linux media version %d detected (current 4)\n", dev, linux_media_version); } else { printk(KERN_WARNING "osst%i: non Linux media detected (%s)\n", dev, id_string); return 0; } if (linux_media_version < STp->linux_media_version) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Skipping frame %d with linux_media_version %d\n", dev, block, linux_media_version); #endif return 0; } if (linux_media_version > STp->linux_media_version) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Frame %d sets linux_media_version to %d\n", dev, block, linux_media_version); #endif memcpy(STp->application_sig, id_string, 5); STp->linux_media_version = linux_media_version; STp->update_frame_cntr = -1; } if (update_frame_cntr > STp->update_frame_cntr) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Frame %d sets update_frame_counter to %d\n", dev, block, update_frame_cntr); #endif if (STp->header_cache == NULL) { if ((STp->header_cache = (os_header_t *)vmalloc(sizeof(os_header_t))) == NULL) { printk(KERN_ERR "osst%i: Failed to allocate header cache\n", dev); return 0; } #if DEBUG printk(OSST_DEB_MSG "osst%d: Allocated memory for header cache\n", dev); #endif } osst_copy_from_buffer(STp->buffer, (unsigned char *)STp->header_cache); header = STp->header_cache; /* further accesses from cached (full) copy */ STp->wrt_pass_cntr = ntohs(header->partition[0].wrt_pass_cntr); STp->first_data_ppos = ntohl(header->partition[0].first_frame_ppos); STp->eod_frame_ppos = ntohl(header->partition[0].eod_frame_ppos); STp->eod_frame_lfa = ntohl(header->ext_track_tb.dat_ext_trk_ey.last_hlb); STp->filemark_cnt = ntohl(aux->filemark_cnt); STp->first_mark_ppos = ntohl(aux->next_mark_ppos); STp->last_mark_ppos = ntohl(aux->last_mark_ppos); STp->update_frame_cntr = update_frame_cntr; #if DEBUG printk(OSST_DEB_MSG "osst%i: detected write pass %d, update frame counter %d, filemark counter %d\n", dev, STp->wrt_pass_cntr, STp->update_frame_cntr, STp->filemark_cnt); printk(OSST_DEB_MSG "osst%i: first data frame on tape = %d, last = %d, eod frame = %d\n", dev, STp->first_data_ppos, ntohl(header->partition[0].last_frame_ppos), ntohl(header->partition[0].eod_frame_ppos)); printk(OSST_DEB_MSG "osst%i: first mark on tape = %d, last = %d, eod frame = %d\n", dev, STp->first_mark_ppos, STp->last_mark_ppos, STp->eod_frame_ppos); #endif if (header->minor_rev < 4 && STp->linux_media_version == 4) { printk(OSST_DEB_MSG "osst%i: Moving filemark list to ADR 1.4 location\n", dev); memcpy((void *)header->dat_fm_tab.fm_tab_ent, (void *)header->old_filemark_list, sizeof(header->dat_fm_tab.fm_tab_ent)); memset((void *)header->old_filemark_list, 0, sizeof(header->old_filemark_list)); } if (header->minor_rev == 4 && (header->ext_trk_tb_off != htons(17192) || header->partition[0].partition_num != OS_DATA_PARTITION || header->partition[0].par_desc_ver != OS_PARTITION_VERSION || header->partition[0].last_frame_ppos != htonl(STp->capacity) || header->cfg_col_width != htonl(20) || header->dat_col_width != htonl(1500) || header->qfa_col_width != htonl(0) || header->ext_track_tb.nr_stream_part != 1 || header->ext_track_tb.et_ent_sz != 32 || header->ext_track_tb.dat_ext_trk_ey.et_part_num != OS_DATA_PARTITION || header->ext_track_tb.dat_ext_trk_ey.fmt != 1 || header->ext_track_tb.dat_ext_trk_ey.fm_tab_off != htons(17736) || header->ext_track_tb.dat_ext_trk_ey.last_hlb_hi != 0 || header->ext_track_tb.dat_ext_trk_ey.last_pp != htonl(STp->eod_frame_ppos) || header->dat_fm_tab.fm_part_num != OS_DATA_PARTITION || header->dat_fm_tab.fm_tab_ent_sz != 4 || header->dat_fm_tab.fm_tab_ent_cnt != htons(STp->filemark_cntfilemark_cnt:OS_FM_TAB_MAX))) printk(KERN_WARNING "osst%i: Failed consistency check ADR 1.4 format\n", dev); // memcpy(STp->header_cache, header, sizeof(os_header_t)); } return 1; } static int osst_analyze_headers(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { int position, block; int first, last; int valid = 0; int dev = TAPE_NR(STp->devt); position = osst_get_frame_position(STp, aSRpnt); if (STp->raw) { STp->header_ok = STp->linux_media = 1; STp->linux_media_version = 0; return 1; } STp->header_ok = STp->linux_media = STp->linux_media_version = 0; STp->wrt_pass_cntr = STp->update_frame_cntr = -1; STp->eod_frame_ppos = STp->first_data_ppos = -1; STp->first_mark_ppos = STp->last_mark_ppos = -1; #if DEBUG printk(OSST_DEB_MSG "osst%i: Reading header\n", dev); #endif /* optimization for speed - if we are positioned at block 10, read second group first */ /* TODO try the ADR 1.1 locations for the second group if we have no valid one yet... */ first = position==10?0xbae: 5; last = position==10?0xbb3:10; for (block = first; block < last; block++) if (__osst_analyze_headers(STp, aSRpnt, block)) valid = 1; first = position==10? 5:0xbae; last = position==10?10:0xbb3; for (block = first; block < last; block++) if (__osst_analyze_headers(STp, aSRpnt, block)) valid = 1; if (!valid) { printk(KERN_ERR "osst%i: Failed to find valid ADRL header, new media?\n", dev); STp->eod_frame_ppos = STp->first_data_ppos = 0; osst_set_frame_position(STp, aSRpnt, 10, 0); return 0; } if (position <= STp->first_data_ppos) { position = STp->first_data_ppos; STp->ps[0].drv_file = STp->ps[0].drv_block = STp->logical_blk_num = 0; } osst_set_frame_position(STp, aSRpnt, position, 0); STp->header_ok = 1; return 1; } static int osst_verify_position(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt) { int frame_position = STp->first_frame_position; int logical_blk_num = STp->logical_blk_num; int prev_mark_ppos = -1; int actual_mark_ppos, i, n; #if 1 //DEBUG int dev = TAPE_NR(STp->devt); printk(OSST_DEB_MSG "osst%i: Verify that the tape is really the one we think before writing\n", dev); #endif osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); if (osst_get_logical_blk(STp, aSRpnt, -1, 0) < 0) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Couldn't get logical blk num in verify_position\n", dev); #endif return (-EIO); } if (STp->linux_media_version >= 4) { for (i=0; ifilemark_cnt; i++) if ((n=ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i])) < frame_position) prev_mark_ppos = n; } else prev_mark_ppos = frame_position - 1; /* usually - we don't really know */ actual_mark_ppos = STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER ? frame_position - 1 : ntohl(STp->buffer->aux->last_mark_ppos); if (frame_position != STp->first_frame_position || logical_blk_num != STp->logical_blk_num + 1 || prev_mark_ppos != actual_mark_ppos ) { #if 1 //DEBUG printk(OSST_DEB_MSG "osst%i: Block mismatch: frame %d-%d, lblk %d-%d, mark %d-%d\n", dev, STp->first_frame_position, frame_position, STp->logical_blk_num + 1, logical_blk_num, actual_mark_ppos, prev_mark_ppos); #endif return (-EIO); } STp->logical_blk_in_buffer = 0; STp->logical_blk_num = logical_blk_num; return 0; } /* Acc. to OnStream, the vers. numbering is the following: * X.XX for released versions (X=digit), * XXXY for unreleased versions (Y=letter) * Ordering 1.05 < 106A < 106a < 106B < ... < 1.06 * This fn makes monoton numbers out of this scheme ... */ static unsigned int osst_parse_firmware_rev (const char * str) { unsigned int rev; if (str[1] == '.') { rev = (str[0]-0x30)*10000 +(str[2]-0x30)*1000 +(str[3]-0x30)*100; } else { rev = (str[0]-0x30)*10000 +(str[1]-0x30)*1000 +(str[2]-0x30)*100 - 100; rev += 2*(str[3] & 0x1f) +(str[3] >= 0x60? 1: 0); } return rev; } /* * Configure the OnStream SCII tape drive for default operation */ static int osst_configure_onstream(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt) { int dev = TAPE_NR(STp->devt); unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt = * aSRpnt; osst_mode_parameter_header_t * header; osst_block_size_page_t * bs; osst_capabilities_page_t * cp; osst_tape_paramtr_page_t * prm; int drive_buffer_size; if (STp->ready != ST_READY) { #if DEBUG printk(OSST_DEB_MSG "osst%i: Not Ready\n", dev); #endif return (-EIO); } if (STp->os_fw_rev < 10600) { printk("osst%i: Old OnStream firmware revision detected (%s)\n", dev, STp->device->rev); printk("osst%i: An upgrade to version 1.06 or above is recommended\n", dev); } /* * Configure 32.5KB (data+aux) frame size. * Get the current block size from the block size mode page */ memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SENSE; cmd[1] = 8; cmd[2] = BLOCK_SIZE_PAGE; cmd[4] = BLOCK_SIZE_PAGE_LENGTH + MODE_HEADER_LENGTH; SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_READ, STp->timeout, 0, TRUE); if (SRpnt == NULL) { #if DEBUG printk(OSST_DEB_MSG "osst: Busy\n"); #endif return (-EBUSY); } *aSRpnt = SRpnt; if ((STp->buffer)->syscall_result != 0) { printk (KERN_ERR "osst%i: Can't get tape block size mode page\n", dev); return (-EIO); } header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; bs = (osst_block_size_page_t *) ((STp->buffer)->b_data + sizeof(osst_mode_parameter_header_t) + header->bdl); #if DEBUG printk(KERN_INFO "osst%i: 32KB play back: %s\n", dev, bs->play32 ? "Yes" : "No"); printk(KERN_INFO "osst%i: 32.5KB play back: %s\n", dev, bs->play32_5 ? "Yes" : "No"); printk(KERN_INFO "osst%i: 32KB record: %s\n", dev, bs->record32 ? "Yes" : "No"); printk(KERN_INFO "osst%i: 32.5KB record: %s\n", dev, bs->record32_5 ? "Yes" : "No"); #endif /* * Configure default auto columns mode, 32.5KB transfer mode */ bs->one = 1; bs->play32 = 0; bs->play32_5 = 1; bs->record32 = 0; bs->record32_5 = 1; memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SELECT; cmd[1] = 0x10; cmd[4] = BLOCK_SIZE_PAGE_LENGTH + MODE_HEADER_LENGTH; SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_WRITE, STp->timeout, 0, TRUE); *aSRpnt = SRpnt; if ((STp->buffer)->syscall_result != 0) { printk (KERN_ERR "osst%i: Couldn't set tape block size mode page\n", dev); return (-EIO); } STp->block_size = (STp->raw) ? OS_FRAME_SIZE : OS_DATA_SIZE; STp->min_block = OS_FRAME_SIZE; /* FIXME */ STp->max_block = STp->block_size; #if DEBUG printk(KERN_INFO "osst%i: Block Size changed to 32.5K\n", dev); /* * In debug mode, we want to see as many errors as possible * to test the error recovery mechanism. */ osst_set_retries(STp, aSRpnt, 0); SRpnt = * aSRpnt; #endif /* * Set vendor name to 'LIN4' for "Linux support version 4". */ memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SELECT; cmd[1] = 0x10; cmd[4] = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH; header->mode_data_length = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH - 1; header->medium_type = 0; /* Medium Type - ignoring */ header->dsp = 0; /* Reserved */ header->bdl = 0; /* Block Descriptor Length */ (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = VENDOR_IDENT_PAGE | (1 << 7); (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 6; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 'L'; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 'I'; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 4] = 'N'; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 5] = '4'; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 6] = 0; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 7] = 0; SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_WRITE, STp->timeout, 0, TRUE); *aSRpnt = SRpnt; if ((STp->buffer)->syscall_result != 0) { printk (KERN_ERR "osst%i: Couldn't set vendor name to %s\n", dev, (char *) ((STp->buffer)->b_data + MODE_HEADER_LENGTH + 2)); return (-EIO); } memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SENSE; cmd[1] = 8; cmd[2] = CAPABILITIES_PAGE; cmd[4] = CAPABILITIES_PAGE_LENGTH + MODE_HEADER_LENGTH; SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_READ, STp->timeout, 0, TRUE); *aSRpnt = SRpnt; if ((STp->buffer)->syscall_result != 0) { printk (KERN_ERR "osst%i: can't get capabilities page\n", dev); return (-EIO); } header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; cp = (osst_capabilities_page_t *) ((STp->buffer)->b_data + sizeof(osst_mode_parameter_header_t) + header->bdl); drive_buffer_size = ntohs(cp->buffer_size) / 2; memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SENSE; cmd[1] = 8; cmd[2] = TAPE_PARAMTR_PAGE; cmd[4] = TAPE_PARAMTR_PAGE_LENGTH + MODE_HEADER_LENGTH; SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_READ, STp->timeout, 0, TRUE); *aSRpnt = SRpnt; if ((STp->buffer)->syscall_result != 0) { printk (KERN_ERR "osst%i: can't get tape parameter page\n", dev); return (-EIO); } header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data; prm = (osst_tape_paramtr_page_t *) ((STp->buffer)->b_data + sizeof(osst_mode_parameter_header_t) + header->bdl); STp->density = prm->density; STp->capacity = ntohs(prm->segtrk) * ntohs(prm->trks); #if DEBUG printk(OSST_DEB_MSG "osst%d: Density %d, tape length: %dMB, drive buffer size: %dKB\n", dev, STp->density, STp->capacity / 32, drive_buffer_size); #endif return 0; } /* Step over EOF if it has been inadvertently crossed (ioctl not used because it messes up the block number). */ static int cross_eof(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int forward) { int result; int dev = TAPE_NR(STp->devt); #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Stepping over filemark %s.\n", dev, forward ? "forward" : "backward"); #endif if (forward) { /* assumes that the filemark is already read by the drive, so this is low cost */ result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1); } else /* assumes this is only called if we just read the filemark! */ result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1); if (result < 0) printk(KERN_ERR "osst%d: Stepping over filemark %s failed.\n", dev, forward ? "forward" : "backward"); return result; } /* Get the tape position. */ static int osst_get_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt) { unsigned char scmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt; int result = 0; /* KG: We want to be able to use it for checking Write Buffer availability * and thus don't want to risk to overwrite anything. Exchange buffers ... */ char mybuf[24]; char * olddata = STp->buffer->b_data; int oldsize = STp->buffer->buffer_size; int dev = TAPE_NR(STp->devt); if (STp->ready != ST_READY) return (-EIO); memset (scmd, 0, MAX_COMMAND_SIZE); scmd[0] = READ_POSITION; STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, SCSI_DATA_READ, STp->timeout, MAX_READY_RETRIES, TRUE); if (!SRpnt) { STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; return (-EBUSY); } *aSRpnt = SRpnt; if (STp->buffer->syscall_result) result = ((SRpnt->sr_sense_buffer[2] & 0x0f) == 3) ? -EIO : -EINVAL; if (result == -EINVAL) printk(KERN_ERR "osst%d: Can't read tape position.\n", dev); else { if (result == -EIO) { /* re-read position */ unsigned char mysense[16]; memcpy (mysense, SRpnt->sr_sense_buffer, 16); memset (scmd, 0, MAX_COMMAND_SIZE); scmd[0] = READ_POSITION; STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; SRpnt = osst_do_scsi(SRpnt, STp, scmd, 20, SCSI_DATA_READ, STp->timeout, MAX_READY_RETRIES, TRUE); if (!STp->buffer->syscall_result) memcpy (SRpnt->sr_sense_buffer, mysense, 16); } STp->first_frame_position = ((STp->buffer)->b_data[4] << 24) + ((STp->buffer)->b_data[5] << 16) + ((STp->buffer)->b_data[6] << 8) + (STp->buffer)->b_data[7]; STp->last_frame_position = ((STp->buffer)->b_data[ 8] << 24) + ((STp->buffer)->b_data[ 9] << 16) + ((STp->buffer)->b_data[10] << 8) + (STp->buffer)->b_data[11]; STp->cur_frames = (STp->buffer)->b_data[15]; #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%d: Drive Positions: host %d, tape %d%s, buffer %d\n", dev, STp->first_frame_position, STp->last_frame_position, ((STp->buffer)->b_data[0]&0x80)?" (BOP)": ((STp->buffer)->b_data[0]&0x40)?" (EOP)":"", STp->cur_frames); } #endif if (STp->cur_frames == 0 && STp->first_frame_position != STp->last_frame_position) { #if DEBUG printk(KERN_WARNING "osst%d: Correcting read position %d, %d, %d\n", dev, STp->first_frame_position, STp->last_frame_position, STp->cur_frames); #endif STp->first_frame_position = STp->last_frame_position; } } STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; return (result == 0 ? STp->first_frame_position : result); } /* Set the tape block */ static int osst_set_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int block, int skip) { unsigned char scmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt; ST_partstat * STps; int result = 0; int timeout; int dev = TAPE_NR(STp->devt); if (STp->ready != ST_READY) return (-EIO); timeout = STp->long_timeout; STps = &(STp->ps[STp->partition]); if (block < 0 || block > STp->capacity) { printk(KERN_ERR "osst%d: Reposition request %d out of range\n", dev, block); block = block < 0 ? 0 : (STp->capacity - 1); result = (-EINVAL); } #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Setting block to %d.\n", dev, block); #endif memset (scmd, 0, MAX_COMMAND_SIZE); scmd[0] = SEEK_10; scmd[1] = 1; scmd[3] = (block >> 24); scmd[4] = (block >> 16); scmd[5] = (block >> 8); scmd[6] = block; if (skip) scmd[9] = 0x80; SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, SCSI_DATA_NONE, timeout, MAX_READY_RETRIES, TRUE); if (!SRpnt) return (-EBUSY); *aSRpnt = SRpnt; STp->first_frame_position = STp->last_frame_position = block; STps->eof = ST_NOEOF; if ((STp->buffer)->syscall_result != 0) { #if DEBUG printk(OSST_DEB_MSG "osst%d: SEEK command failed.\n", dev); #endif result = (-EIO); } STps->at_sm = 0; STps->rw = ST_IDLE; STp->logical_blk_in_buffer = 0; return result; } /* osst versions of st functions - augmented and stripped to suit OnStream only */ /* Flush the write buffer (never need to write if variable blocksize). */ static int osst_flush_write_buffer(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int file_blk) { int offset, transfer, blks = 0; int result = 0; unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt = *aSRpnt; ST_partstat * STps; int dev = TAPE_NR(STp->devt); if ((STp->buffer)->writing) { if (SRpnt == (STp->buffer)->last_SRpnt) #if DEBUG { printk(OSST_DEB_MSG "osst%d: aSRpnt points to Scsi_Request that write_behind_check will release -- cleared\n", dev); #endif *aSRpnt = SRpnt = NULL; #if DEBUG } else if (SRpnt) printk(OSST_DEB_MSG "osst%d: aSRpnt does not point to Scsi_Request that write_behind_check will release -- strange\n", dev); #endif osst_write_behind_check(STp); if ((STp->buffer)->syscall_result) { #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Async write error (flush) %x.\n", dev, (STp->buffer)->midlevel_result); #endif if ((STp->buffer)->midlevel_result == INT_MAX) return (-ENOSPC); return (-EIO); } } result = 0; if (STp->dirty == 1) { offset = STp->buffer->buffer_bytes; transfer = OS_FRAME_SIZE; blks = 1; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Flushing %d bytes, Tranfering %d bytes in %d blocks.\n", dev, offset, transfer, blks); #endif if (offset < OS_DATA_SIZE) osst_zero_buffer_tail(STp->buffer); /* TODO: Error handling! */ if (STp->poll) result = osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120); memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = WRITE_6; cmd[1] = 1; cmd[4] = blks; SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, SCSI_DATA_WRITE, STp->timeout, MAX_WRITE_RETRIES, TRUE); *aSRpnt = SRpnt; if (!SRpnt) return (-EBUSY); STps = &(STp->ps[STp->partition]); if ((STp->buffer)->syscall_result != 0) { printk(OSST_DEB_MSG "osst%d: write sense [0]=0x%02x [2]=%02x [12]=%02x [13]=%02x\n", dev, SRpnt->sr_sense_buffer[0], SRpnt->sr_sense_buffer[2], SRpnt->sr_sense_buffer[12], SRpnt->sr_sense_buffer[13]); if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 && (SRpnt->sr_sense_buffer[2] & 0x40) && /* FIXME - SC-30 drive doesn't assert EOM bit */ (SRpnt->sr_sense_buffer[2] & 0x0f) == NO_SENSE) { STp->dirty = 0; (STp->buffer)->buffer_bytes = 0; result = (-ENOSPC); } else { if (osst_write_error_recovery(STp, aSRpnt, 1)) { printk(KERN_ERR "osst%d: Error on flush.\n", dev); result = (-EIO); } } STps->drv_block = (-1); } else { if (file_blk && STps->drv_block >= 0) STps->drv_block += blks; STp->first_frame_position += blks; STp->dirty = 0; (STp->buffer)->buffer_bytes = 0; } } #if DEBUG printk(OSST_DEB_MSG "osst%d: Exit flush write buffer with code %d\n", dev, result); #endif return result; } /* Flush the tape buffer. The tape will be positioned correctly unless seek_next is true. */ static int osst_flush_buffer(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int seek_next) { int backspace, result; OSST_buffer * STbuffer; ST_partstat * STps; #if DEBUG int dev = TAPE_NR(STp->devt); #endif STbuffer = STp->buffer; /* * If there was a bus reset, block further access * to this device. */ if( STp->device->was_reset ) return (-EIO); if (STp->ready != ST_READY) return 0; STps = &(STp->ps[STp->partition]); if (STps->rw == ST_WRITING) /* Writing */ return osst_flush_write_buffer(STp, aSRpnt, 1); if (STp->block_size == 0) return 0; #if DEBUG printk(OSST_DEB_MSG "osst%i: Reached flush (read) buffer\n", dev); #endif backspace = ((STp->buffer)->buffer_bytes + (STp->buffer)->read_pointer) / STp->block_size - ((STp->buffer)->read_pointer + STp->block_size - 1 ) / STp->block_size ; (STp->buffer)->buffer_bytes = 0; (STp->buffer)->read_pointer = 0; result = 0; if (!seek_next) { if (STps->eof == ST_FM_HIT) { result = cross_eof(STp, aSRpnt, FALSE); /* Back over the EOF hit */ if (!result) STps->eof = ST_NOEOF; else { if (STps->drv_file >= 0) STps->drv_file++; STps->drv_block = 0; } } if (!result && backspace > 0) /* TODO -- design and run a test case for this */ result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace); } else if (STps->eof == ST_FM_HIT) { if (STps->drv_file >= 0) STps->drv_file++; STps->drv_block = 0; STps->eof = ST_NOEOF; } return result; } /* Entry points to osst */ /* Write command */ static ssize_t osst_write(struct file * filp, const char * buf, size_t count, loff_t *ppos) { struct inode *inode = filp->f_dentry->d_inode; ssize_t total, retval = 0; ssize_t i, do_count, blks, transfer; int write_threshold; int doing_write = 0; unsigned char cmd[MAX_COMMAND_SIZE]; const char *b_point; Scsi_Request * SRpnt = NULL; OS_Scsi_Tape * STp; ST_mode * STm; ST_partstat * STps; int dev = TAPE_NR(inode->i_rdev); STp = os_scsi_tapes[dev]; if (down_interruptible(&STp->lock)) return (-ERESTARTSYS); /* * If we are in the middle of error recovery, don't let anyone * else try and use this device. Also, if error recovery fails, it * may try and take the device offline, in which case all further * access to the device is prohibited. */ if( !scsi_block_when_processing_errors(STp->device) ) { retval = (-ENXIO); goto out; } if (ppos != &filp->f_pos) { /* "A request was outside the capabilities of the device." */ retval = (-ENXIO); goto out; } if (STp->ready != ST_READY) { if (STp->ready == ST_NO_TAPE) retval = (-ENOMEDIUM); else retval = (-EIO); goto out; } STm = &(STp->modes[STp->current_mode]); if (!STm->defined) { retval = (-ENXIO); goto out; } if (count == 0) goto out; /* * If there was a bus reset, block further access * to this device. */ if (STp->device->was_reset) { retval = (-EIO); goto out; } #if DEBUG if (!STp->in_use) { printk(OSST_DEB_MSG "osst%d: Incorrect device.\n", dev); retval = (-EIO); goto out; } #endif if (STp->write_prot) { retval = (-EACCES); goto out; } /* Write must be integral number of blocks */ if (STp->block_size != 0 && (count % STp->block_size) != 0) { printk(KERN_WARNING "osst%d: Write (%ld bytes) not multiple of tape block size (32k).\n", dev, (unsigned long)count); retval = (-EINVAL); goto out; } if (STp->first_frame_position >= STp->capacity - 164) { printk(KERN_WARNING "osst%d: Write truncated at EOM early warning (frame %d).\n", dev, STp->first_frame_position); retval = (-ENOSPC); goto out; } STps = &(STp->ps[STp->partition]); if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !osst_int_ioctl(STp, &SRpnt, MTLOCK, 0)) STp->door_locked = ST_LOCKED_AUTO; if (STps->rw == ST_READING) { retval = osst_flush_buffer(STp, &SRpnt, 0); if (retval) goto out; STps->rw = ST_IDLE; } else if (STps->rw != ST_WRITING) { /* Are we totally rewriting this tape? */ if (!STp->header_ok || STp->first_frame_position == STp->first_data_ppos || (STps->drv_file == 0 && STps->drv_block == 0)) { STp->wrt_pass_cntr++; #if DEBUG printk(OSST_DEB_MSG "osst%d: Allocating next write pass counter: %d\n", dev, STp->wrt_pass_cntr); #endif osst_reset_header(STp, &SRpnt); STps->drv_file = STps->drv_block = STp->logical_blk_num = 0; } /* Do we know where we'll be writing on the tape? */ else { if ((STp->fast_open && osst_verify_position(STp, &SRpnt)) || STps->drv_file < 0 || STps->drv_block < 0) { if (STp->first_frame_position == STp->eod_frame_ppos) { STps->drv_file = STp->filemark_cnt; STps->drv_block = 0; } else { /* We have no idea where the tape is positioned - give up */ #if DEBUG printk(OSST_DEB_MSG "osst%d: Cannot write at indeterminate position.\n", dev); #endif retval = (-EIO); goto out; } } if (STps->drv_file > 0 && STps->drv_file < STp->filemark_cnt) { STp->filemark_cnt = STps->drv_file; STp->last_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt-1]); printk(KERN_WARNING "osst%d: Overwriting file %d with old write pass counter %d\n", dev, STps->drv_file, STp->wrt_pass_cntr); printk(KERN_WARNING "osst%d: may lead to stale data being accepted on reading back!\n", dev); #if DEBUG printk(OSST_DEB_MSG "osst%d: resetting filemark count to %d and last mark ppos to %d\n", dev, STp->filemark_cnt, STp->last_mark_ppos); #endif } } STp->fast_open = FALSE; } if (!STp->header_ok) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Write cannot proceed without valid headers\n", dev); #endif retval = (-EIO); goto out; } if ((STp->buffer)->writing) { if (SRpnt) printk(KERN_ERR "osst%d: Not supposed to have SRpnt at line %d\n", dev, __LINE__); osst_write_behind_check(STp); if ((STp->buffer)->syscall_result) { #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Async write error (write) %x.\n", dev, (STp->buffer)->midlevel_result); #endif if ((STp->buffer)->midlevel_result == INT_MAX) STps->eof = ST_EOM_OK; else STps->eof = ST_EOM_ERROR; } } if (STps->eof == ST_EOM_OK) { retval = (-ENOSPC); goto out; } else if (STps->eof == ST_EOM_ERROR) { retval = (-EIO); goto out; } /* Check the buffer readability in cases where copy_user might catch the problems after some tape movement. */ if ((copy_from_user(&i, buf, 1) != 0 || copy_from_user(&i, buf + count - 1, 1) != 0)) { retval = (-EFAULT); goto out; } if (!STm->do_buffer_writes) { #if 0 if (STp->block_size != 0 && (count % STp->block_size) != 0) {retval=(-EIO);goto out;} /* Write must be integral number of blocks */ #endif write_threshold = 1; } else write_threshold = (STp->buffer)->buffer_blocks * STp->block_size; if (!STm->do_async_writes) write_threshold--; total = count; if ((!STp-> raw) && (STp->first_frame_position == 0xbae)) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Skipping over config partition.\n", dev); #endif if (osst_flush_drive_buffer(STp, &SRpnt) < 0) { retval = (-EIO); goto out; } /* error recovery may have bumped us past the header partition */ if (osst_get_frame_position(STp, &SRpnt) < 0xbb8) osst_position_tape_and_confirm(STp, &SRpnt, 0xbb8); } if (STp->poll) retval = osst_wait_frame (STp, &SRpnt, STp->first_frame_position, -50, 60); /* TODO: Check for an error ! */ memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = WRITE_6; cmd[1] = 1; STps->rw = ST_WRITING; STp->write_type = OS_WRITE_DATA; #if DEBUG printk(OSST_DEB_MSG "osst%d: Writing %d bytes to file %d block %d lblk %d frame %d\n", dev, count, STps->drv_file, STps->drv_block, STp->logical_blk_num, STp->first_frame_position); #endif b_point = buf; while ((STp->buffer)->buffer_bytes + count > write_threshold) { doing_write = 1; do_count = (STp->buffer)->buffer_blocks * STp->block_size - (STp->buffer)->buffer_bytes; if (do_count > count) do_count = count; i = append_to_buffer(b_point, STp->buffer, do_count); if (i) { retval = i; goto out; } transfer = OS_FRAME_SIZE; blks = 1; osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->logical_blk_num++ ); cmd[2] = blks >> 16; cmd[3] = blks >> 8; cmd[4] = blks; SRpnt = osst_do_scsi(SRpnt, STp, cmd, transfer, SCSI_DATA_WRITE, STp->timeout, MAX_WRITE_RETRIES, TRUE); if (!SRpnt) { retval = (STp->buffer)->syscall_result; goto out; } if ((STp->buffer)->syscall_result != 0) { #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Error on write:\n", dev); #endif if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 && (SRpnt->sr_sense_buffer[2] & 0x40)) { if ((SRpnt->sr_sense_buffer[0] & 0x80) != 0) transfer = (SRpnt->sr_sense_buffer[3] << 24) | (SRpnt->sr_sense_buffer[4] << 16) | (SRpnt->sr_sense_buffer[5] << 8) | SRpnt->sr_sense_buffer[6]; else transfer = 0; transfer *= STp->block_size; if (transfer <= do_count) { filp->f_pos += do_count - transfer; count -= do_count - transfer; if (STps->drv_block >= 0) { STps->drv_block += (do_count - transfer) / STp->block_size; } STps->eof = ST_EOM_OK; retval = (-ENOSPC); /* EOM within current request */ #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: EOM with %d bytes unwritten.\n", dev, transfer); #endif } else { STps->eof = ST_EOM_ERROR; STps->drv_block = (-1); /* Too cautious? */ retval = (-EIO); /* EOM for old data */ #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: EOM with lost data.\n", dev); #endif } } else { if (osst_write_error_recovery(STp, &SRpnt, 1) == 0) goto ok; STps->drv_block = (-1); /* Too cautious? */ retval = (-EIO); } (STp->buffer)->buffer_bytes = 0; STp->dirty = 0; if (count < total) retval = total - count; goto out; } STp->first_frame_position++; ok: filp->f_pos += do_count; b_point += do_count; count -= do_count; if (STps->drv_block >= 0) { STps->drv_block += blks; } STp->first_frame_position += blks; (STp->buffer)->buffer_bytes = 0; STp->dirty = 0; } if (count != 0) { STp->dirty = 1; i = append_to_buffer(b_point, STp->buffer, count); if (i) { retval = i; goto out; } filp->f_pos += count; count = 0; } if (doing_write && (STp->buffer)->syscall_result != 0) { retval = (STp->buffer)->syscall_result; goto out; } if (STm->do_async_writes && ((STp->buffer)->buffer_bytes >= STp->write_threshold && (STp->buffer)->buffer_bytes >= OS_DATA_SIZE) ) { /* Schedule an asynchronous write */ (STp->buffer)->writing = ((STp->buffer)->buffer_bytes / STp->block_size) * STp->block_size; STp->dirty = !((STp->buffer)->writing == (STp->buffer)->buffer_bytes); transfer = OS_FRAME_SIZE; blks = 1; osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->logical_blk_num++ ); cmd[2] = blks >> 16; cmd[3] = blks >> 8; cmd[4] = blks; #if DEBUG STp->write_pending = 1; #endif SRpnt = osst_do_scsi(SRpnt, STp, cmd, transfer, SCSI_DATA_WRITE, STp->timeout, MAX_WRITE_RETRIES, FALSE); if (SRpnt == NULL) { retval = (STp->buffer)->syscall_result; goto out; } } // else if (SRpnt != NULL) { // scsi_release_request(SRpnt); /* FIXME -- this relesae no longer in st - why? */ SRpnt = NULL; /* Prevent releasing this request! */ // } STps->at_sm &= (total == 0); if (total > 0) STps->eof = ST_NOEOF; retval = total; out: if (SRpnt != NULL) scsi_release_request(SRpnt); up(&STp->lock); return retval; } /* Read command */ static ssize_t osst_read(struct file * filp, char * buf, size_t count, loff_t *ppos) { struct inode * inode = filp->f_dentry->d_inode; ssize_t total, retval = 0; ssize_t i, transfer; int special; OS_Scsi_Tape * STp; ST_mode * STm; ST_partstat * STps; Scsi_Request *SRpnt = NULL; int dev = TAPE_NR(inode->i_rdev); STp = os_scsi_tapes[dev]; if (down_interruptible(&STp->lock)) return (-ERESTARTSYS); /* * If we are in the middle of error recovery, don't let anyone * else try and use this device. Also, if error recovery fails, it * may try and take the device offline, in which case all further * access to the device is prohibited. */ if( !scsi_block_when_processing_errors(STp->device) ) { retval = (-ENXIO); goto out; } if (ppos != &filp->f_pos) { /* "A request was outside the capabilities of the device." */ retval = (-ENXIO); goto out; } if (STp->ready != ST_READY) { if (STp->ready == ST_NO_TAPE) retval = (-ENOMEDIUM); else retval = (-EIO); goto out; } STm = &(STp->modes[STp->current_mode]); if (!STm->defined) { retval = (-ENXIO); goto out; } #if DEBUG if (!STp->in_use) { printk(OSST_DEB_MSG "osst%d: Incorrect device.\n", dev); retval = (-EIO); goto out; } #endif /* Must have initialized medium */ if (!STp->header_ok) { retval = (-EIO); goto out; } if ((count % STp->block_size) != 0) { printk(KERN_WARNING "osst%d: Use multiple of %d bytes as block size (%ld requested)\n", dev, STp->block_size, (unsigned long) count); retval = (-EINVAL); /* Read must be integral number of blocks */ goto out; } if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !osst_int_ioctl(STp, &SRpnt, MTLOCK, 0)) STp->door_locked = ST_LOCKED_AUTO; STps = &(STp->ps[STp->partition]); if (STps->rw == ST_WRITING) { retval = osst_flush_buffer(STp, &SRpnt, 0); if (retval) goto out; STps->rw = ST_IDLE; } #if DEBUG if (debugging && STps->eof != ST_NOEOF) printk(OSST_DEB_MSG "osst%d: EOF/EOM flag up (%d). Bytes %d\n", dev, STps->eof, (STp->buffer)->buffer_bytes); #endif if ((STp->buffer)->buffer_bytes == 0 && STps->eof >= ST_EOD_1) { if (STps->eof < ST_EOD) { STps->eof += 1; retval = 0; goto out; } retval = (-EIO); /* EOM or Blank Check */ goto out; } /* Check the buffer writability before any tape movement. Don't alter buffer data. */ if (copy_from_user(&i, buf, 1) != 0 || copy_to_user (buf, &i, 1) != 0 || copy_from_user(&i, buf + count - 1, 1) != 0 || copy_to_user (buf + count - 1, &i, 1) != 0) { retval = (-EFAULT); goto out; } /* Loop until enough data in buffer or a special condition found */ for (total = 0, special = 0; total < count && !special; ) { /* Get new data if the buffer is empty */ if ((STp->buffer)->buffer_bytes == 0) { special = osst_get_logical_blk(STp, &SRpnt, STp->logical_blk_num, 0); STp->buffer->buffer_bytes = special ? 0 : OS_DATA_SIZE; STp->buffer->read_pointer = 0; STp->logical_blk_num++; /* block to look for next time */ STp->logical_blk_in_buffer = 0; if (special < 0) { /* No need to continue read */ retval = special; goto out; } STps->drv_block++; } /* Move the data from driver buffer to user buffer */ if ((STp->buffer)->buffer_bytes > 0) { #if DEBUG if (debugging && STps->eof != ST_NOEOF) printk(OSST_DEB_MSG "osst%d: EOF up (%d). Left %d, needed %d.\n", dev, STps->eof, (STp->buffer)->buffer_bytes, count - total); #endif transfer = (STp->buffer)->buffer_bytes < count - total ? (STp->buffer)->buffer_bytes : count - total; i = from_buffer(STp->buffer, buf, transfer); if (i) { retval = i; goto out; } filp->f_pos += transfer; buf += transfer; total += transfer; } } /* for (total = 0, special = 0; total < count && !special; ) */ /* Change the eof state if no data from tape or buffer */ if (total == 0) { if (STps->eof == ST_FM_HIT) { STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_FM; STps->drv_block = 0; if (STps->drv_file >= 0) STps->drv_file++; } else if (STps->eof == ST_EOD_1) { STps->eof = ST_EOD_2; if (STps->drv_block > 0 && STps->drv_file >= 0) STps->drv_file++; STps->drv_block = 0; } else if (STps->eof == ST_EOD_2) STps->eof = ST_EOD; } else if (STps->eof == ST_FM) STps->eof = ST_NOEOF; retval = total; out: if (SRpnt != NULL) scsi_release_request(SRpnt); up(&STp->lock); return retval; } /* Set the driver options */ static void osst_log_options(OS_Scsi_Tape *STp, ST_mode *STm, int dev) { printk(KERN_INFO "osst%d: Mode %d options: buffer writes: %d, async writes: %d, read ahead: %d\n", dev, STp->current_mode, STm->do_buffer_writes, STm->do_async_writes, STm->do_read_ahead); printk(KERN_INFO "osst%d: can bsr: %d, two FMs: %d, fast mteom: %d, auto lock: %d,\n", dev, STp->can_bsr, STp->two_fm, STp->fast_mteom, STp->do_auto_lock); printk(KERN_INFO "osst%d: defs for wr: %d, no block limits: %d, partitions: %d, s2 log: %d\n", dev, STm->defaults_for_writes, STp->omit_blklims, STp->can_partitions, STp->scsi2_logical); printk(KERN_INFO "osst%d: sysv: %d\n", dev, STm->sysv); #if DEBUG printk(KERN_INFO "osst%d: debugging: %d\n", dev, debugging); #endif } static int osst_set_options(OS_Scsi_Tape *STp, long options) { int value; long code; ST_mode *STm; int dev = TAPE_NR(STp->devt); STm = &(STp->modes[STp->current_mode]); if (!STm->defined) { memcpy(STm, &(STp->modes[0]), sizeof(ST_mode)); modes_defined = TRUE; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Initialized mode %d definition from mode 0\n", dev, STp->current_mode); #endif } code = options & MT_ST_OPTIONS; if (code == MT_ST_BOOLEANS) { STm->do_buffer_writes = (options & MT_ST_BUFFER_WRITES) != 0; STm->do_async_writes = (options & MT_ST_ASYNC_WRITES) != 0; STm->defaults_for_writes = (options & MT_ST_DEF_WRITES) != 0; STm->do_read_ahead = (options & MT_ST_READ_AHEAD) != 0; STp->two_fm = (options & MT_ST_TWO_FM) != 0; STp->fast_mteom = (options & MT_ST_FAST_MTEOM) != 0; STp->do_auto_lock = (options & MT_ST_AUTO_LOCK) != 0; STp->can_bsr = (options & MT_ST_CAN_BSR) != 0; STp->omit_blklims = (options & MT_ST_NO_BLKLIMS) != 0; if ((STp->device)->scsi_level >= SCSI_2) STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0; STp->scsi2_logical = (options & MT_ST_SCSI2LOGICAL) != 0; STm->sysv = (options & MT_ST_SYSV) != 0; #if DEBUG debugging = (options & MT_ST_DEBUGGING) != 0; #endif osst_log_options(STp, STm, dev); } else if (code == MT_ST_SETBOOLEANS || code == MT_ST_CLEARBOOLEANS) { value = (code == MT_ST_SETBOOLEANS); if ((options & MT_ST_BUFFER_WRITES) != 0) STm->do_buffer_writes = value; if ((options & MT_ST_ASYNC_WRITES) != 0) STm->do_async_writes = value; if ((options & MT_ST_DEF_WRITES) != 0) STm->defaults_for_writes = value; if ((options & MT_ST_READ_AHEAD) != 0) STm->do_read_ahead = value; if ((options & MT_ST_TWO_FM) != 0) STp->two_fm = value; if ((options & MT_ST_FAST_MTEOM) != 0) STp->fast_mteom = value; if ((options & MT_ST_AUTO_LOCK) != 0) STp->do_auto_lock = value; if ((options & MT_ST_CAN_BSR) != 0) STp->can_bsr = value; if ((options & MT_ST_NO_BLKLIMS) != 0) STp->omit_blklims = value; if ((STp->device)->scsi_level >= SCSI_2 && (options & MT_ST_CAN_PARTITIONS) != 0) STp->can_partitions = value; if ((options & MT_ST_SCSI2LOGICAL) != 0) STp->scsi2_logical = value; if ((options & MT_ST_SYSV) != 0) STm->sysv = value; #if DEBUG if ((options & MT_ST_DEBUGGING) != 0) debugging = value; #endif osst_log_options(STp, STm, dev); } else if (code == MT_ST_WRITE_THRESHOLD) { value = (options & ~MT_ST_OPTIONS) * ST_KILOBYTE; if (value < 1 || value > osst_buffer_size) { printk(KERN_WARNING "osst%d: Write threshold %d too small or too large.\n", dev, value); return (-EIO); } STp->write_threshold = value; printk(KERN_INFO "osst%d: Write threshold set to %d bytes.\n", dev, value); } else if (code == MT_ST_DEF_BLKSIZE) { value = (options & ~MT_ST_OPTIONS); if (value == ~MT_ST_OPTIONS) { STm->default_blksize = (-1); printk(KERN_INFO "osst%d: Default block size disabled.\n", dev); } else { STm->default_blksize = value; printk(KERN_INFO "osst%d: Default block size set to %d bytes.\n", dev, STm->default_blksize); } } else if (code == MT_ST_TIMEOUTS) { value = (options & ~MT_ST_OPTIONS); if ((value & MT_ST_SET_LONG_TIMEOUT) != 0) { STp->long_timeout = (value & ~MT_ST_SET_LONG_TIMEOUT) * HZ; printk(KERN_INFO "osst%d: Long timeout set to %d seconds.\n", dev, (value & ~MT_ST_SET_LONG_TIMEOUT)); } else { STp->timeout = value * HZ; printk(KERN_INFO "osst%d: Normal timeout set to %d seconds.\n", dev, value); } } else if (code == MT_ST_DEF_OPTIONS) { code = (options & ~MT_ST_CLEAR_DEFAULT); value = (options & MT_ST_CLEAR_DEFAULT); if (code == MT_ST_DEF_DENSITY) { if (value == MT_ST_CLEAR_DEFAULT) { STm->default_density = (-1); printk(KERN_INFO "osst%d: Density default disabled.\n", dev); } else { STm->default_density = value & 0xff; printk(KERN_INFO "osst%d: Density default set to %x\n", dev, STm->default_density); } } else if (code == MT_ST_DEF_DRVBUFFER) { if (value == MT_ST_CLEAR_DEFAULT) { STp->default_drvbuffer = 0xff; printk(KERN_INFO "osst%d: Drive buffer default disabled.\n", dev); } else { STp->default_drvbuffer = value & 7; printk(KERN_INFO "osst%d: Drive buffer default set to %x\n", dev, STp->default_drvbuffer); } } else if (code == MT_ST_DEF_COMPRESSION) { if (value == MT_ST_CLEAR_DEFAULT) { STm->default_compression = ST_DONT_TOUCH; printk(KERN_INFO "osst%d: Compression default disabled.\n", dev); } else { STm->default_compression = (value & 1 ? ST_YES : ST_NO); printk(KERN_INFO "osst%d: Compression default set to %x\n", dev, (value & 1)); } } } else return (-EIO); return 0; } /* Internal ioctl function */ static int osst_int_ioctl(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned int cmd_in, unsigned long arg) { int timeout; long ltmp; int i, ioctl_result; int chg_eof = TRUE; unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt = * aSRpnt; ST_partstat * STps; int fileno, blkno, at_sm, logical_blk_num; int datalen = 0, direction = SCSI_DATA_NONE; int dev = TAPE_NR(STp->devt); if (STp->ready != ST_READY && cmd_in != MTLOAD) { if (STp->ready == ST_NO_TAPE) return (-ENOMEDIUM); else return (-EIO); } timeout = STp->long_timeout; STps = &(STp->ps[STp->partition]); fileno = STps->drv_file; blkno = STps->drv_block; at_sm = STps->at_sm; logical_blk_num = STp->logical_blk_num; memset(cmd, 0, MAX_COMMAND_SIZE); switch (cmd_in) { case MTFSFM: chg_eof = FALSE; /* Changed from the FSF after this */ case MTFSF: if (STp->raw) return (-EIO); if (STp->linux_media) ioctl_result = osst_space_over_filemarks_forward_fast(STp, &SRpnt, cmd_in, arg); else ioctl_result = osst_space_over_filemarks_forward_slow(STp, &SRpnt, cmd_in, arg); logical_blk_num = STp->logical_blk_num; if (fileno >= 0) fileno += arg; blkno = 0; at_sm &= (arg == 0); goto os_bypass; case MTBSF: chg_eof = FALSE; /* Changed from the FSF after this */ case MTBSFM: if (STp->raw) return (-EIO); ioctl_result = osst_space_over_filemarks_backward(STp, &SRpnt, cmd_in, arg); logical_blk_num = STp->logical_blk_num; if (fileno >= 0) fileno -= arg; blkno = (-1); /* We can't know the block number */ at_sm &= (arg == 0); goto os_bypass; case MTFSR: case MTBSR: #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%i: Skipping %lu blocks %s from logical block %d\n", dev, arg, cmd_in==MTFSR?"forward":"backward", logical_blk_num); #endif if (cmd_in == MTFSR) { logical_blk_num += arg; if (blkno >= 0) blkno += arg; } else { logical_blk_num -= arg; if (blkno >= 0) blkno -= arg; } ioctl_result = osst_seek_logical_blk(STp, &SRpnt, logical_blk_num-1); STp->logical_blk_in_buffer = 0; at_sm &= (arg == 0); goto os_bypass; case MTFSS: cmd[0] = SPACE; cmd[1] = 0x04; /* Space Setmarks */ /* FIXME -- OS can't do this? */ cmd[2] = (arg >> 16); cmd[3] = (arg >> 8); cmd[4] = arg; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Spacing tape forward %d setmarks.\n", dev, cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); #endif if (arg != 0) { blkno = fileno = (-1); at_sm = 1; } break; case MTBSS: cmd[0] = SPACE; cmd[1] = 0x04; /* Space Setmarks */ /* FIXME -- OS can't do this? */ ltmp = (-arg); cmd[2] = (ltmp >> 16); cmd[3] = (ltmp >> 8); cmd[4] = ltmp; #if DEBUG if (debugging) { if (cmd[2] & 0x80) ltmp = 0xff000000; ltmp = ltmp | (cmd[2] << 16) | (cmd[3] << 8) | cmd[4]; printk(OSST_DEB_MSG "osst%d: Spacing tape backward %ld setmarks.\n", dev, (-ltmp)); } #endif if (arg != 0) { blkno = fileno = (-1); at_sm = 1; } break; case MTWEOF: if ( STps->rw == ST_WRITING && !(STp->device)->was_reset) ioctl_result = osst_flush_write_buffer(STp, &SRpnt, 1); else ioctl_result = 0; for (i=0; ilogical_blk_num; if (fileno >= 0) fileno += arg; if (blkno >= 0) blkno = 0; goto os_bypass; case MTWSM: if (STp->write_prot) return (-EACCES); if (!STp->raw) return 0; cmd[0] = WRITE_FILEMARKS; /* FIXME -- need OS version */ if (cmd_in == MTWSM) cmd[1] = 2; cmd[2] = (arg >> 16); cmd[3] = (arg >> 8); cmd[4] = arg; timeout = STp->timeout; #if DEBUG if (debugging) { if (cmd_in == MTWEOF) printk(OSST_DEB_MSG "osst%d: Writing %d filemarks.\n", dev, cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); else printk(OSST_DEB_MSG "osst%d: Writing %d setmarks.\n", dev, cmd[2] * 65536 + cmd[3] * 256 + cmd[4]); } #endif if (fileno >= 0) fileno += arg; blkno = 0; at_sm = (cmd_in == MTWSM); break; case MTOFFL: case MTLOAD: case MTUNLOAD: case MTRETEN: cmd[0] = START_STOP; cmd[1] = 1; /* Don't wait for completion */ if (cmd_in == MTLOAD) cmd[4] = 1; /* load */ if (cmd_in == MTRETEN) cmd[4] = 3; /* retension then mount */ if (cmd_in == MTOFFL) cmd[4] = 4; /* rewind then eject */ timeout = STp->timeout; #if DEBUG if (debugging) { switch (cmd_in) { case MTUNLOAD: printk(OSST_DEB_MSG "osst%d: Unloading tape.\n", dev); break; case MTLOAD: printk(OSST_DEB_MSG "osst%d: Loading tape.\n", dev); break; case MTRETEN: printk(OSST_DEB_MSG "osst%d: Retensioning tape.\n", dev); break; case MTOFFL: printk(OSST_DEB_MSG "osst%d: Ejecting tape.\n", dev); break; } } #endif fileno = blkno = at_sm = logical_blk_num = 0 ; break; case MTNOP: #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: No op on tape.\n", dev); #endif return 0; /* Should do something ? */ break; case MTEOM: #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Spacing to end of recorded medium.\n", dev); #endif osst_set_frame_position(STp, &SRpnt, STp->eod_frame_ppos, 0); if (osst_get_logical_blk(STp, &SRpnt, -1, 0) < 0) { ioctl_result = -EIO; goto os_bypass; } if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_EOD) { #if DEBUG printk(OSST_DEB_MSG "osst%d: No EOD frame found where expected.\n", dev); #endif ioctl_result = -EIO; goto os_bypass; } ioctl_result = osst_set_frame_position(STp, &SRpnt, STp->eod_frame_ppos, 0); logical_blk_num = STp->logical_blk_num; fileno = STp->filemark_cnt; blkno = at_sm = 0; goto os_bypass; case MTERASE: if (STp->write_prot) return (-EACCES); ioctl_result = osst_reset_header(STp, &SRpnt); i = osst_write_eod(STp, &SRpnt); if (i < ioctl_result) ioctl_result = i; i = osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos); if (i < ioctl_result) ioctl_result = i; fileno = blkno = at_sm = logical_blk_num = 0 ; goto os_bypass; case MTREW: cmd[0] = REZERO_UNIT; /* rewind */ cmd[1] = 1; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Rewinding tape, Immed=%d.\n", dev, cmd[1]); #endif fileno = blkno = at_sm = logical_blk_num = 0 ; break; case MTLOCK: chg_eof = FALSE; cmd[0] = ALLOW_MEDIUM_REMOVAL; cmd[4] = SCSI_REMOVAL_PREVENT; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Locking drive door.\n", dev); #endif; break; case MTUNLOCK: chg_eof = FALSE; cmd[0] = ALLOW_MEDIUM_REMOVAL; cmd[4] = SCSI_REMOVAL_ALLOW; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Unlocking drive door.\n", dev); #endif; break; case MTSETBLK: /* Set block length */ case MTSETDENSITY: /* Set tape density */ case MTSETDRVBUFFER: /* Set drive buffering */ case SET_DENS_AND_BLK: /* Set density and block size */ chg_eof = FALSE; if (STp->dirty || (STp->buffer)->buffer_bytes != 0) return (-EIO); /* Not allowed if data in buffer */ if ((cmd_in == MTSETBLK || cmd_in == SET_DENS_AND_BLK) && (arg & MT_ST_BLKSIZE_MASK) != 0 && ((arg & MT_ST_BLKSIZE_MASK) < STp->min_block || (arg & MT_ST_BLKSIZE_MASK) > STp->max_block || (arg & MT_ST_BLKSIZE_MASK) > osst_buffer_size)) { printk(KERN_WARNING "osst%d: Illegal block size.\n", dev); return (-EINVAL); } return 0; /* silently ignore if block size didn't change */ default: return (-ENOSYS); } SRpnt = osst_do_scsi(SRpnt, STp, cmd, datalen, direction, timeout, MAX_RETRIES, TRUE); ioctl_result = (STp->buffer)->syscall_result; if (!SRpnt) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Couldn't exec scsi cmd for IOCTL\n", dev); #endif return ioctl_result; } os_bypass: #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: IOCTL (%d) Result=%d\n", dev, cmd_in, ioctl_result); #endif if (!ioctl_result) { /* SCSI command successful */ if (cmd_in == MTFSFM) { fileno--; blkno--; } if (cmd_in == MTBSFM) { fileno++; blkno++; } STps->drv_block = blkno; STps->drv_file = fileno; STps->at_sm = at_sm; STp->logical_blk_num = logical_blk_num; if (cmd_in == MTLOCK) STp->door_locked = ST_LOCKED_EXPLICIT; else if (cmd_in == MTUNLOCK) STp->door_locked = ST_UNLOCKED; if (cmd_in == MTEOM) STps->eof = ST_EOD; else if (cmd_in == MTFSF) STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_FM; else if (chg_eof) STps->eof = ST_NOEOF; if (cmd_in == MTOFFL || cmd_in == MTUNLOAD) STp->rew_at_close = 0; else if (cmd_in == MTLOAD) { /* STp->rew_at_close = (MINOR(inode->i_rdev) & 0x80) == 0; FIXME */ for (i=0; i < ST_NBR_PARTITIONS; i++) { STp->ps[i].rw = ST_IDLE; STp->ps[i].last_block_valid = FALSE; } STp->partition = 0; } if (cmd_in == MTREW) { ioctl_result = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos); if (ioctl_result > 0) ioctl_result = 0; } } else if (cmd_in == MTBSF || cmd_in == MTBSFM ) { if (osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos) < 0) STps->drv_file = STps->drv_block = -1; else STps->drv_file = STps->drv_block = 0; STps->eof = ST_NOEOF; } else if (cmd_in == MTFSF || cmd_in == MTFSFM) { if (osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) STps->drv_file = STps->drv_block = -1; else { STps->drv_file = STp->filemark_cnt; STps->drv_block = 0; } STps->eof = ST_EOD; } else if (cmd_in == MTBSR || cmd_in == MTFSR || cmd_in == MTWEOF || cmd_in == MTEOM) { STps->drv_file = STps->drv_block = (-1); STps->eof = ST_NOEOF; STp->header_ok = 0; } else if (cmd_in == MTERASE) { STp->header_ok = 0; } else if (SRpnt) { /* SCSI command was not completely successful. */ if (SRpnt->sr_sense_buffer[2] & 0x40) { STps->eof = ST_EOM_OK; STps->drv_block = 0; } if (chg_eof) STps->eof = ST_NOEOF; if ((SRpnt->sr_sense_buffer[2] & 0x0f) == BLANK_CHECK) STps->eof = ST_EOD; if (cmd_in == MTLOCK) STp->door_locked = ST_LOCK_FAILS; } *aSRpnt = SRpnt; return ioctl_result; } /* Open the device */ static int os_scsi_tape_open(struct inode * inode, struct file * filp) { unsigned short flags; int i, b_size, need_dma_buffer, new_session = FALSE, retval = 0; unsigned char cmd[MAX_COMMAND_SIZE]; Scsi_Request * SRpnt; OS_Scsi_Tape * STp; ST_mode * STm; ST_partstat * STps; int dev = TAPE_NR(inode->i_rdev); int mode = TAPE_MODE(inode->i_rdev); if (dev >= osst_template.dev_max || (STp = os_scsi_tapes[dev]) == NULL || !STp->device) return (-ENXIO); if( !scsi_block_when_processing_errors(STp->device) ) { return -ENXIO; } if (STp->in_use) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Device already in use.\n", dev); #endif return (-EBUSY); } STp->in_use = 1; STp->rew_at_close = (MINOR(inode->i_rdev) & 0x80) == 0; if (STp->device->host->hostt->module) __MOD_INC_USE_COUNT(STp->device->host->hostt->module); if (osst_template.module) __MOD_INC_USE_COUNT(osst_template.module); if (mode != STp->current_mode) { #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Mode change from %d to %d.\n", dev, STp->current_mode, mode); #endif new_session = TRUE; STp->current_mode = mode; } STm = &(STp->modes[STp->current_mode]); flags = filp->f_flags; STp->write_prot = ((flags & O_ACCMODE) == O_RDONLY); STp->raw = (MINOR(inode->i_rdev) & 0x40) != 0; /* Allocate a buffer for this user */ need_dma_buffer = STp->restr_dma; for (i=0; i < osst_nbr_buffers; i++) if (!osst_buffers[i]->in_use && (!need_dma_buffer || osst_buffers[i]->dma)) break; if (i >= osst_nbr_buffers) { STp->buffer = new_tape_buffer(FALSE, need_dma_buffer); if (STp->buffer == NULL) { printk(KERN_WARNING "osst%d: Can't allocate tape buffer.\n", dev); retval = (-EBUSY); goto err_out; } } else STp->buffer = osst_buffers[i]; (STp->buffer)->in_use = 1; (STp->buffer)->writing = 0; (STp->buffer)->syscall_result = 0; (STp->buffer)->use_sg = STp->device->host->sg_tablesize; /* Compute the usable buffer size for this SCSI adapter */ if (!(STp->buffer)->use_sg) (STp->buffer)->buffer_size = (STp->buffer)->sg[0].length; else { for (i=0, (STp->buffer)->buffer_size = 0; i < (STp->buffer)->use_sg && i < (STp->buffer)->sg_segs; i++) (STp->buffer)->buffer_size += (STp->buffer)->sg[i].length; } STp->dirty = 0; for (i=0; i < ST_NBR_PARTITIONS; i++) { STps = &(STp->ps[i]); STps->rw = ST_IDLE; } STp->ready = ST_READY; STp->recover_count = 0; #if DEBUG STp->nbr_waits = STp->nbr_finished = 0; #endif memset (cmd, 0, MAX_COMMAND_SIZE); cmd[0] = TEST_UNIT_READY; SRpnt = osst_do_scsi(NULL, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); if (!SRpnt) { retval = (STp->buffer)->syscall_result; goto err_out; } if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 && (SRpnt->sr_sense_buffer[2] & 0x0f) == NOT_READY && SRpnt->sr_sense_buffer[12] == 4 ) { #if DEBUG printk(OSST_DEB_MSG "osst%d: Unit not ready, cause %x\n", dev, SRpnt->sr_sense_buffer[13]); #endif if (SRpnt->sr_sense_buffer[13] == 2) { /* initialize command required (LOAD) */ memset (cmd, 0, MAX_COMMAND_SIZE); cmd[0] = START_STOP; cmd[1] = 1; cmd[4] = 1; SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); } osst_wait_ready(STp, &SRpnt, (SRpnt->sr_sense_buffer[13]==1?15:3) * 60); } if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 && (SRpnt->sr_sense_buffer[2] & 0x0f) == UNIT_ATTENTION) { /* New media? */ #if DEBUG printk(OSST_DEB_MSG "osst%d: Unit wants attention\n", dev); #endif STp->header_ok = 0; for (i=0; i < 10; i++) { memset (cmd, 0, MAX_COMMAND_SIZE); cmd[0] = TEST_UNIT_READY; SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); if ((SRpnt->sr_sense_buffer[0] & 0x70) != 0x70 || (SRpnt->sr_sense_buffer[2] & 0x0f) != UNIT_ATTENTION) break; } STp->device->was_reset = 0; STp->partition = STp->new_partition = 0; if (STp->can_partitions) STp->nbr_partitions = 1; /* This guess will be updated later if necessary */ for (i=0; i < ST_NBR_PARTITIONS; i++) { STps = &(STp->ps[i]); STps->rw = ST_IDLE; STps->eof = ST_NOEOF; STps->at_sm = 0; STps->last_block_valid = FALSE; STps->drv_block = 0; STps->drv_file = 0 ; } new_session = TRUE; } /* * if we have valid headers from before, and the drive/tape seem untouched, * open without reconfiguring and re-reading the headers */ if (!STp->buffer->syscall_result && STp->header_ok && !SRpnt->sr_result && SRpnt->sr_sense_buffer[0] == 0) { memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SENSE; cmd[1] = 8; cmd[2] = VENDOR_IDENT_PAGE; cmd[4] = VENDOR_IDENT_PAGE_LENGTH + MODE_HEADER_LENGTH; SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_READ, STp->timeout, 0, TRUE); if (STp->buffer->syscall_result || STp->buffer->b_data[MODE_HEADER_LENGTH + 2] != 'L' || STp->buffer->b_data[MODE_HEADER_LENGTH + 3] != 'I' || STp->buffer->b_data[MODE_HEADER_LENGTH + 4] != 'N' || STp->buffer->b_data[MODE_HEADER_LENGTH + 5] != '4' ) { #if DEBUG printk(OSST_DEB_MSG "osst%d: signature was changed to %c%c%c%c\n", dev, STp->buffer->b_data[MODE_HEADER_LENGTH + 2], STp->buffer->b_data[MODE_HEADER_LENGTH + 3], STp->buffer->b_data[MODE_HEADER_LENGTH + 4], STp->buffer->b_data[MODE_HEADER_LENGTH + 5]); #endif STp->header_ok = 0; } i = STp->first_frame_position; if (STp->header_ok && i == osst_get_frame_position(STp, &SRpnt)) { if (STp->door_locked == ST_UNLOCKED) { if (osst_int_ioctl(STp, &SRpnt, MTLOCK, 0)) printk(KERN_WARNING "osst%d: Can't lock drive door\n", dev); else STp->door_locked = ST_LOCKED_AUTO; } STp->fast_open = TRUE; scsi_release_request(SRpnt); return 0; } #if DEBUG if (i != STp->first_frame_position) printk(OSST_DEB_MSG "osst%d: tape position changed from %d to %d\n", dev, i, STp->first_frame_position); #endif STp->header_ok = 0; } STp->fast_open = FALSE; if ((STp->buffer)->syscall_result != 0 && /* in all error conditions except no medium */ (SRpnt->sr_sense_buffer[2] != 2 || SRpnt->sr_sense_buffer[12] != 0x3A) ) { memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SELECT; cmd[1] = 0x10; cmd[4] = 4 + MODE_HEADER_LENGTH; (STp->buffer)->b_data[0] = cmd[4] - 1; (STp->buffer)->b_data[1] = 0; /* Medium Type - ignoring */ (STp->buffer)->b_data[2] = 0; /* Reserved */ (STp->buffer)->b_data[3] = 0; /* Block Descriptor Length */ (STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = 0x3f; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 1; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 2; (STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 3; #if 1 //DEBUG printk(OSST_DEB_MSG "osst%i: Applying soft reset\n", dev); #endif SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], SCSI_DATA_WRITE, STp->timeout, 0, TRUE); STp->header_ok = 0; for (i=0; i < 10; i++) { memset (cmd, 0, MAX_COMMAND_SIZE); cmd[0] = TEST_UNIT_READY; SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE); if ((SRpnt->sr_sense_buffer[0] & 0x70) != 0x70 || (SRpnt->sr_sense_buffer[2] & 0x0f) == NOT_READY) break; if ((SRpnt->sr_sense_buffer[2] & 0x0f) == UNIT_ATTENTION) { STp->device->was_reset = 0; STp->partition = STp->new_partition = 0; if (STp->can_partitions) STp->nbr_partitions = 1; /* This guess will be updated later if necessary */ for (i=0; i < ST_NBR_PARTITIONS; i++) { STps = &(STp->ps[i]); STps->rw = ST_IDLE; STps->eof = ST_NOEOF; STps->at_sm = 0; STps->last_block_valid = FALSE; STps->drv_block = 0; STps->drv_file = 0 ; } new_session = TRUE; } } } if (osst_wait_ready(STp, &SRpnt, 15 * 60)) /* FIXME - not allowed with NOBLOCK */ printk(KERN_WARNING "osst%i: Device did not become Ready in open\n",dev); if ((STp->buffer)->syscall_result != 0) { if ((STp->device)->scsi_level >= SCSI_2 && (SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 && (SRpnt->sr_sense_buffer[2] & 0x0f) == NOT_READY && SRpnt->sr_sense_buffer[12] == 0x3a) { /* Check ASC */ STp->ready = ST_NO_TAPE; } else STp->ready = ST_NOT_READY; scsi_release_request(SRpnt); SRpnt = NULL; STp->density = 0; /* Clear the erroneous "residue" */ STp->write_prot = 0; STp->block_size = 0; STp->ps[0].drv_file = STp->ps[0].drv_block = (-1); STp->partition = STp->new_partition = 0; STp->door_locked = ST_UNLOCKED; return 0; } STp->min_block = STp->max_block = (-1); osst_configure_onstream(STp, &SRpnt); /* STp->drv_write_prot = ((STp->buffer)->b_data[2] & 0x80) != 0; FIXME */ if (OS_FRAME_SIZE > (STp->buffer)->buffer_size && !enlarge_buffer(STp->buffer, OS_FRAME_SIZE, STp->restr_dma)) { printk(KERN_NOTICE "osst%d: Framesize %d too large for buffer.\n", dev, OS_FRAME_SIZE); retval = (-EIO); goto err_out; } if ((STp->buffer)->buffer_size >= OS_FRAME_SIZE) { for (i = 0, b_size = 0; i < STp->buffer->sg_segs && (b_size + STp->buffer->sg[i].length) <= OS_DATA_SIZE; b_size += STp->buffer->sg[i++].length); STp->buffer->aux = (os_aux_t *) (STp->buffer->sg[i].address + OS_DATA_SIZE - b_size); #if DEBUG printk(OSST_DEB_MSG "osst%d: b_data points to %p in segment 0 at %p\n", dev, STp->buffer->b_data, STp->buffer->sg[0].address); printk(OSST_DEB_MSG "osst%d: AUX points to %p in segment %d at %p\n", dev, STp->buffer->aux, i, STp->buffer->sg[i].address); #endif } else STp->buffer->aux = NULL; /* this had better never happen! */ (STp->buffer)->buffer_blocks = 1; (STp->buffer)->buffer_bytes = (STp->buffer)->read_pointer = STp->logical_blk_in_buffer = 0; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Block size: %d, frame size: %d, buffer size: %d (%d blocks).\n", dev, STp->block_size, OS_FRAME_SIZE, (STp->buffer)->buffer_size, (STp->buffer)->buffer_blocks); #endif if (STp->drv_write_prot) { STp->write_prot = 1; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Write protected\n", dev); #endif if ((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR) { retval = (-EROFS); goto err_out; } } if (new_session) { /* Change the drive parameters for the new mode */ #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: New Session\n", dev); #endif STp->density_changed = STp->blksize_changed = FALSE; STp->compression_changed = FALSE; } /* * properly position the tape and check the ADR headers */ if (STp->door_locked == ST_UNLOCKED) { if (osst_int_ioctl(STp, &SRpnt, MTLOCK, 0)) printk(KERN_WARNING "osst%d: Can't lock drive door\n", dev); else STp->door_locked = ST_LOCKED_AUTO; } osst_analyze_headers(STp, &SRpnt); scsi_release_request(SRpnt); SRpnt = NULL; return 0; err_out: if (SRpnt != NULL) scsi_release_request(SRpnt); if (STp->buffer != NULL) { STp->buffer->in_use = 0; STp->buffer = NULL; } STp->in_use = 0; if (STp->device->host->hostt->module) __MOD_DEC_USE_COUNT(STp->device->host->hostt->module); if (osst_template.module) __MOD_DEC_USE_COUNT(osst_template.module); return retval; } /* Flush the tape buffer before close */ static int os_scsi_tape_flush(struct file * filp) { int result = 0, result2; OS_Scsi_Tape * STp; ST_mode * STm; ST_partstat * STps; Scsi_Request *SRpnt = NULL; struct inode *inode = filp->f_dentry->d_inode; kdev_t devt = inode->i_rdev; int dev; if (file_count(filp) > 1) return 0; dev = TAPE_NR(devt); STp = os_scsi_tapes[dev]; STm = &(STp->modes[STp->current_mode]); STps = &(STp->ps[STp->partition]); if ( STps->rw == ST_WRITING && !(STp->device)->was_reset) { result = osst_flush_write_buffer(STp, &SRpnt, 1); if (result != 0 && result != (-ENOSPC)) goto out; } if ( STps->rw == ST_WRITING && !(STp->device)->was_reset) { #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst%d: File length %ld bytes.\n", dev, (long)(filp->f_pos)); printk(OSST_DEB_MSG "osst%d: Async write waits %d, finished %d.\n", dev, STp->nbr_waits, STp->nbr_finished); } #endif result = osst_flush_drive_buffer(STp, &SRpnt); if (result < 0) goto out; result = osst_write_filemark(STp, &SRpnt); if (result < 0) goto out; if (STps->drv_file >= 0) STps->drv_file++ ; STps->drv_block = 0; result = osst_write_eod(STp, &SRpnt); osst_write_header(STp, &SRpnt, !(STp->rew_at_close)); STps->eof = ST_FM; #if DEBUG if (debugging) printk(OSST_DEB_MSG "osst%d: Buffer flushed, %d EOF(s) written\n", dev, 1+STp->two_fm); #endif } else if (!STp->rew_at_close) { STps = &(STp->ps[STp->partition]); if (!STm->sysv || STps->rw != ST_READING) { if (STp->can_bsr) result = osst_flush_buffer(STp, &SRpnt, 0); else if (STps->eof == ST_FM_HIT) { result = cross_eof(STp, &SRpnt, FALSE); if (result) { if (STps->drv_file >= 0) STps->drv_file++; STps->drv_block = 0; STps->eof = ST_FM; } else STps->eof = ST_NOEOF; } } else if ((STps->eof == ST_NOEOF && !(result = cross_eof(STp, &SRpnt, TRUE))) || STps->eof == ST_FM_HIT) { if (STps->drv_file >= 0) STps->drv_file++; STps->drv_block = 0; STps->eof = ST_FM; } } out: if (STp->rew_at_close) { result2 = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos); STps->drv_file = STps->drv_block = STp->logical_blk_num = 0; if (result == 0) result = result2; } if (SRpnt) scsi_release_request(SRpnt); return result; } /* Close the device and release it */ static int os_scsi_tape_close(struct inode * inode, struct file * filp) { int result = 0; OS_Scsi_Tape * STp; Scsi_Request * SRpnt = NULL; kdev_t devt = inode->i_rdev; int dev; dev = TAPE_NR(devt); STp = os_scsi_tapes[dev]; if (STp->door_locked == ST_LOCKED_AUTO) osst_int_ioctl(STp, &SRpnt, MTUNLOCK, 0); if (SRpnt) scsi_release_request(SRpnt); if (STp->buffer != NULL) STp->buffer->in_use = 0; STp->in_use = 0; if (STp->device->host->hostt->module) __MOD_DEC_USE_COUNT(STp->device->host->hostt->module); if(osst_template.module) __MOD_DEC_USE_COUNT(osst_template.module); return result; } /* The ioctl command */ static int osst_ioctl(struct inode * inode,struct file * file, unsigned int cmd_in, unsigned long arg) { int i, cmd_nr, cmd_type, retval = 0; unsigned int blk; OS_Scsi_Tape *STp; ST_mode *STm; ST_partstat *STps; Scsi_Request *SRpnt = NULL; int dev = TAPE_NR(inode->i_rdev); STp = os_scsi_tapes[dev]; if (down_interruptible(&STp->lock)) return -ERESTARTSYS; #if DEBUG if (debugging && !STp->in_use) { printk(OSST_DEB_MSG "osst%d: Incorrect device.\n", dev); retval = (-EIO); goto out; } #endif STm = &(STp->modes[STp->current_mode]); STps = &(STp->ps[STp->partition]); /* * If we are in the middle of error recovery, don't let anyone * else try and use this device. Also, if error recovery fails, it * may try and take the device offline, in which case all further * access to the device is prohibited. */ if( !scsi_block_when_processing_errors(STp->device) ) { retval = (-ENXIO); goto out; } cmd_type = _IOC_TYPE(cmd_in); cmd_nr = _IOC_NR(cmd_in); if (cmd_type == _IOC_TYPE(MTIOCTOP) && cmd_nr == _IOC_NR(MTIOCTOP)) { struct mtop mtc; if (_IOC_SIZE(cmd_in) != sizeof(mtc)) { retval = (-EINVAL); goto out; } i = copy_from_user((char *) &mtc, (char *)arg, sizeof(struct mtop)); if (i) { retval = (-EFAULT); goto out; } if (mtc.mt_op == MTSETDRVBUFFER && !capable(CAP_SYS_ADMIN)) { printk(KERN_WARNING "osst%d: MTSETDRVBUFFER only allowed for root.\n", dev); retval = (-EPERM); goto out; } if (!STm->defined && (mtc.mt_op != MTSETDRVBUFFER && (mtc.mt_count & MT_ST_OPTIONS) == 0)) { retval = (-ENXIO); goto out; } if (!(STp->device)->was_reset) { if (STps->eof == ST_FM_HIT) { if (mtc.mt_op == MTFSF || mtc.mt_op == MTFSFM|| mtc.mt_op == MTEOM) { mtc.mt_count -= 1; if (STps->drv_file >= 0) STps->drv_file += 1; } else if (mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM) { mtc.mt_count += 1; if (STps->drv_file >= 0) STps->drv_file += 1; } } if (mtc.mt_op == MTSEEK) { /* Old position must be restored if partition will be changed */ i = !STp->can_partitions || (STp->new_partition != STp->partition); } else { i = mtc.mt_op == MTREW || mtc.mt_op == MTOFFL || mtc.mt_op == MTRETEN || mtc.mt_op == MTEOM || mtc.mt_op == MTLOCK || mtc.mt_op == MTLOAD || mtc.mt_op == MTCOMPRESSION; } i = osst_flush_buffer(STp, &SRpnt, i); if (i < 0) { retval = i; goto out; } } else { /* * If there was a bus reset, block further access * to this device. If the user wants to rewind the tape, * then reset the flag and allow access again. */ if(mtc.mt_op != MTREW && mtc.mt_op != MTOFFL && mtc.mt_op != MTRETEN && mtc.mt_op != MTERASE && mtc.mt_op != MTSEEK && mtc.mt_op != MTEOM) { retval = (-EIO); goto out; } STp->device->was_reset = 0; if (STp->door_locked != ST_UNLOCKED && STp->door_locked != ST_LOCK_FAILS) { if (osst_int_ioctl(STp, &SRpnt, MTLOCK, 0)) { printk(KERN_NOTICE "osst%d: Could not relock door after bus reset.\n", dev); STp->door_locked = ST_UNLOCKED; } } } if (mtc.mt_op != MTNOP && mtc.mt_op != MTSETBLK && mtc.mt_op != MTSETDENSITY && mtc.mt_op != MTWSM && mtc.mt_op != MTSETDRVBUFFER && mtc.mt_op != MTSETPART) STps->rw = ST_IDLE; /* Prevent automatic WEOF and fsf */ if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED) osst_int_ioctl(STp, &SRpnt, MTUNLOCK, 0); /* Ignore result! */ if (mtc.mt_op == MTSETDRVBUFFER && (mtc.mt_count & MT_ST_OPTIONS) != 0) { retval = osst_set_options(STp, mtc.mt_count); goto out; } if (mtc.mt_op == MTSETPART) { /* if (!STp->can_partitions || mtc.mt_count < 0 || mtc.mt_count >= ST_NBR_PARTITIONS) return (-EINVAL); if (mtc.mt_count >= STp->nbr_partitions && (STp->nbr_partitions = nbr_partitions(inode)) < 0) return (-EIO);*/ if (mtc.mt_count >= STp->nbr_partitions) retval = -EINVAL; else { STp->new_partition = mtc.mt_count; retval = 0; } goto out; } if (mtc.mt_op == MTMKPART) { if (!STp->can_partitions) { retval = (-EINVAL); goto out; } if ((i = osst_int_ioctl(STp, &SRpnt, MTREW, 0)) < 0 /*|| (i = partition_tape(inode, mtc.mt_count)) < 0*/) { retval = i; goto out; } for (i=0; i < ST_NBR_PARTITIONS; i++) { STp->ps[i].rw = ST_IDLE; STp->ps[i].at_sm = 0; STp->ps[i].last_block_valid = FALSE; } STp->partition = STp->new_partition = 0; STp->nbr_partitions = 1; /* Bad guess ?-) */ STps->drv_block = STps->drv_file = 0; retval = 0; goto out; } if (mtc.mt_op == MTSEEK) { i = osst_seek_frame(STp, &SRpnt, mtc.mt_count); if (!STp->can_partitions) STp->ps[0].rw = ST_IDLE; retval = i; goto out; } /* if (STp->can_partitions && STp->ready == ST_READY && (i = update_partition(inode)) < 0) {retval=i;goto out;}*/ if (mtc.mt_op == MTCOMPRESSION) retval = -EINVAL /*osst_compression(STp, (mtc.mt_count & 1))*/; else retval = osst_int_ioctl(STp, &SRpnt, mtc.mt_op, mtc.mt_count); goto out; } if (!STm->defined) { retval = (-ENXIO); goto out; } if ((i = osst_flush_buffer(STp, &SRpnt, FALSE)) < 0) { retval = i; goto out; } /* if (STp->can_partitions && (i = update_partition(inode)) < 0) {retval=i;goto out;}*/ if (cmd_type == _IOC_TYPE(MTIOCGET) && cmd_nr == _IOC_NR(MTIOCGET)) { struct mtget mt_status; if (_IOC_SIZE(cmd_in) != sizeof(struct mtget)) { retval = (-EINVAL); goto out; } mt_status.mt_type = MT_ISONSTREAM_SC; mt_status.mt_erreg = STp->recover_erreg << MT_ST_SOFTERR_SHIFT; mt_status.mt_dsreg = ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) | ((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK); mt_status.mt_blkno = STps->drv_block; mt_status.mt_fileno = STps->drv_file; if (STp->block_size != 0) { if (STps->rw == ST_WRITING) mt_status.mt_blkno += (STp->buffer)->buffer_bytes / STp->block_size; else if (STps->rw == ST_READING) mt_status.mt_blkno -= ((STp->buffer)->buffer_bytes + STp->block_size - 1) / STp->block_size; } mt_status.mt_gstat = 0; if (STp->drv_write_prot) mt_status.mt_gstat |= GMT_WR_PROT(0xffffffff); if (mt_status.mt_blkno == 0) { if (mt_status.mt_fileno == 0) mt_status.mt_gstat |= GMT_BOT(0xffffffff); else mt_status.mt_gstat |= GMT_EOF(0xffffffff); } mt_status.mt_resid = STp->partition; if (STps->eof == ST_EOM_OK || STps->eof == ST_EOM_ERROR) mt_status.mt_gstat |= GMT_EOT(0xffffffff); else if (STps->eof >= ST_EOM_OK) mt_status.mt_gstat |= GMT_EOD(0xffffffff); if (STp->density == 1) mt_status.mt_gstat |= GMT_D_800(0xffffffff); else if (STp->density == 2) mt_status.mt_gstat |= GMT_D_1600(0xffffffff); else if (STp->density == 3) mt_status.mt_gstat |= GMT_D_6250(0xffffffff); if (STp->ready == ST_READY) mt_status.mt_gstat |= GMT_ONLINE(0xffffffff); if (STp->ready == ST_NO_TAPE) mt_status.mt_gstat |= GMT_DR_OPEN(0xffffffff); if (STps->at_sm) mt_status.mt_gstat |= GMT_SM(0xffffffff); if (STm->do_async_writes || (STm->do_buffer_writes && STp->block_size != 0) || STp->drv_buffer != 0) mt_status.mt_gstat |= GMT_IM_REP_EN(0xffffffff); i = copy_to_user((char *)arg, (char *)&mt_status, sizeof(struct mtget)); if (i) { retval = (-EFAULT); goto out; } STp->recover_erreg = 0; /* Clear after read */ retval = 0; goto out; } /* End of MTIOCGET */ if (cmd_type == _IOC_TYPE(MTIOCPOS) && cmd_nr == _IOC_NR(MTIOCPOS)) { struct mtpos mt_pos; if (_IOC_SIZE(cmd_in) != sizeof(struct mtpos)) { retval = (-EINVAL); goto out; } blk = osst_get_frame_position(STp, &SRpnt); if (blk < 0) { retval = blk; goto out; } mt_pos.mt_blkno = blk; i = copy_to_user((char *)arg, (char *) (&mt_pos), sizeof(struct mtpos)); if (i) retval = -EFAULT; goto out; } if (SRpnt) scsi_release_request(SRpnt); up(&STp->lock); return scsi_ioctl(STp->device, cmd_in, (void *) arg); out: if (SRpnt) scsi_release_request(SRpnt); up(&STp->lock); return retval; } /* Memory handling routines */ /* Try to allocate a new tape buffer */ static OSST_buffer * new_tape_buffer( int from_initialization, int need_dma ) { int i, priority, b_size, order, got = 0, segs = 0; OSST_buffer *tb; if (osst_nbr_buffers >= osst_template.dev_max) return NULL; /* Should never happen */ if (from_initialization) priority = GFP_ATOMIC; else priority = GFP_KERNEL; i = sizeof(OSST_buffer) + (osst_max_sg_segs - 1) * sizeof(struct scatterlist); tb = (OSST_buffer *)kmalloc(i, priority); if (tb) { // tb->this_size = i; if (need_dma) priority |= GFP_DMA; /* Try to allocate the first segment up to OSST_FIRST_ORDER and the others big enough to reach the goal */ for (b_size = PAGE_SIZE, order = 0; b_size < osst_buffer_size && order < OSST_FIRST_ORDER; b_size *= 2, order++ ); for ( ; b_size >= PAGE_SIZE; order--, b_size /= 2) { tb->sg[0].address = (unsigned char *)__get_free_pages(priority, order); if (tb->sg[0].address != NULL) { tb->sg[0].alt_address = NULL; tb->sg[0].length = b_size; break; } } if (tb->sg[segs].address == NULL) { kfree(tb); tb = NULL; } else { /* Got something, continue */ for (b_size = PAGE_SIZE, order = 0; osst_buffer_size > tb->sg[0].length + (OSST_FIRST_SG - 1) * b_size; b_size *= 2, order++ ); for (segs=1, got=tb->sg[0].length; got < osst_buffer_size && segs < OSST_FIRST_SG; ) { tb->sg[segs].address = (unsigned char *)__get_free_pages(priority, order); if (tb->sg[segs].address == NULL) { if (osst_buffer_size - got <= (OSST_FIRST_SG - segs) * b_size / 2) { b_size /= 2; /* Large enough for the rest of the buffers */ order--; continue; } tb->sg_segs = segs; tb->orig_sg_segs = 0; #if DEBUG tb->buffer_size = got; #endif normalize_buffer(tb); kfree(tb); tb = NULL; break; } tb->sg[segs].alt_address = NULL; tb->sg[segs].length = b_size; got += b_size; segs++; } } } if (!tb) { printk(KERN_NOTICE "osst: Can't allocate new tape buffer (nbr %d).\n", osst_nbr_buffers); return NULL; } tb->sg_segs = tb->orig_sg_segs = segs; tb->b_data = tb->sg[0].address; #if DEBUG if (debugging) { printk(OSST_DEB_MSG "osst: Allocated tape buffer %d (%d bytes, %d segments, dma: %d, a: %p).\n", osst_nbr_buffers, got, tb->sg_segs, need_dma, tb->b_data); printk(OSST_DEB_MSG "osst: segment sizes: first %d, last %d bytes.\n", tb->sg[0].length, tb->sg[segs-1].length); } #endif tb->in_use = 0; tb->dma = need_dma; tb->buffer_size = got; tb->writing = 0; osst_buffers[osst_nbr_buffers++] = tb; return tb; } /* Try to allocate a temporary enlarged tape buffer */ static int enlarge_buffer(OSST_buffer *STbuffer, int new_size, int need_dma) { int segs, nbr, max_segs, b_size, priority, order, got; normalize_buffer(STbuffer); max_segs = STbuffer->use_sg; if (max_segs > osst_max_sg_segs) max_segs = osst_max_sg_segs; nbr = max_segs - STbuffer->sg_segs; if (nbr <= 0) return FALSE; priority = GFP_KERNEL; if (need_dma) priority |= GFP_DMA; for (b_size = PAGE_SIZE, order = 0; b_size * nbr < new_size - STbuffer->buffer_size; b_size *= 2, order++); for (segs=STbuffer->sg_segs, got=STbuffer->buffer_size; segs < max_segs && got < new_size; ) { STbuffer->sg[segs].address = (unsigned char *)__get_free_pages(priority, order); if (STbuffer->sg[segs].address == NULL) { if (new_size - got <= (max_segs - segs) * b_size / 2) { b_size /= 2; /* Large enough for the rest of the buffers */ order--; continue; } printk(KERN_NOTICE "osst: Failed to enlarge buffer to %d bytes.\n", new_size); #if DEBUG STbuffer->buffer_size = got; #endif normalize_buffer(STbuffer); return FALSE; } STbuffer->sg[segs].alt_address = NULL; STbuffer->sg[segs].length = b_size; STbuffer->sg_segs += 1; got += b_size; STbuffer->buffer_size = got; segs++; } #if DEBUG if (debugging) { for (nbr=0; osst_buffers[nbr] != STbuffer && nbr < osst_nbr_buffers; nbr++); printk(OSST_DEB_MSG "osst: Expanded tape buffer %d (%d bytes, %d->%d segments, dma: %d, a: %p).\n", nbr, got, STbuffer->orig_sg_segs, STbuffer->sg_segs, need_dma, STbuffer->b_data); printk(OSST_DEB_MSG "osst: segment sizes: first %d, last %d bytes.\n", STbuffer->sg[0].length, STbuffer->sg[segs-1].length); } #endif return TRUE; } /* Release the extra buffer */ static void normalize_buffer(OSST_buffer *STbuffer) { int i, order, b_size; for (i=STbuffer->orig_sg_segs; i < STbuffer->sg_segs; i++) { for (b_size = PAGE_SIZE, order = 0; b_size < STbuffer->sg[i].length; b_size *= 2, order++); free_pages((unsigned long)STbuffer->sg[i].address, order); STbuffer->buffer_size -= STbuffer->sg[i].length; } #if DEBUG if (debugging && STbuffer->orig_sg_segs < STbuffer->sg_segs) printk(OSST_DEB_MSG "osst: Buffer at %p normalized to %d bytes (segs %d).\n", STbuffer->b_data, STbuffer->buffer_size, STbuffer->sg_segs); #endif STbuffer->sg_segs = STbuffer->orig_sg_segs; } /* Move data from the user buffer to the tape buffer. Returns zero (success) or negative error code. */ static int append_to_buffer(const char *ubp, OSST_buffer *st_bp, int do_count) { int i, cnt, res, offset; for (i=0, offset=st_bp->buffer_bytes; i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) offset -= st_bp->sg[i].length; if (i == st_bp->sg_segs) { /* Should never happen */ printk(KERN_WARNING "osst: Append_to_buffer offset overflow.\n"); return (-EIO); } for ( ; i < st_bp->sg_segs && do_count > 0; i++) { cnt = st_bp->sg[i].length - offset < do_count ? st_bp->sg[i].length - offset : do_count; res = copy_from_user(st_bp->sg[i].address + offset, ubp, cnt); if (res) return (-EFAULT); do_count -= cnt; st_bp->buffer_bytes += cnt; ubp += cnt; offset = 0; } if (do_count) { /* Should never happen */ printk(KERN_WARNING "osst: Append_to_buffer overflow (left %d).\n", do_count); return (-EIO); } return 0; } /* Move data from the tape buffer to the user buffer. Returns zero (success) or negative error code. */ static int from_buffer(OSST_buffer *st_bp, char *ubp, int do_count) { int i, cnt, res, offset; for (i=0, offset=st_bp->read_pointer; i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) offset -= st_bp->sg[i].length; if (i == st_bp->sg_segs) { /* Should never happen */ printk(KERN_WARNING "osst: From_buffer offset overflow.\n"); return (-EIO); } for ( ; i < st_bp->sg_segs && do_count > 0; i++) { cnt = st_bp->sg[i].length - offset < do_count ? st_bp->sg[i].length - offset : do_count; res = copy_to_user(ubp, st_bp->sg[i].address + offset, cnt); if (res) return (-EFAULT); do_count -= cnt; st_bp->buffer_bytes -= cnt; st_bp->read_pointer += cnt; ubp += cnt; offset = 0; } if (do_count) { /* Should never happen */ printk(KERN_WARNING "osst: From_buffer overflow (left %d).\n", do_count); return (-EIO); } return 0; } /* Sets the tail of the buffer after fill point to zero. Returns zero (success) or negative error code. */ static int osst_zero_buffer_tail(OSST_buffer *st_bp) { int i, offset, do_count, cnt; for (i = 0, offset = st_bp->buffer_bytes; i < st_bp->sg_segs && offset >= st_bp->sg[i].length; i++) offset -= st_bp->sg[i].length; if (i == st_bp->sg_segs) { /* Should never happen */ printk(KERN_WARNING "osst: Zero_buffer offset overflow.\n"); return (-EIO); } for (do_count = OS_DATA_SIZE - st_bp->read_pointer; i < st_bp->sg_segs && do_count > 0; i++) { cnt = st_bp->sg[i].length - offset < do_count ? st_bp->sg[i].length - offset : do_count ; memset(st_bp->sg[i].address + offset, 0, cnt); do_count -= cnt; offset = 0; } if (do_count) { /* Should never happen */ printk(KERN_WARNING "osst: Zero_buffer overflow (left %d).\n", do_count); return (-EIO); } return 0; } /* Copy a osst 32K block of memory into the buffer. Returns zero (success) or negative error code. */ static int osst_copy_to_buffer(OSST_buffer *st_bp, unsigned char *ptr) { int i, cnt, do_count = OS_DATA_SIZE; for (i = 0; i < st_bp->sg_segs && do_count > 0; i++) { cnt = st_bp->sg[i].length < do_count ? st_bp->sg[i].length : do_count ; memcpy(st_bp->sg[i].address, ptr, cnt); do_count -= cnt; ptr += cnt; } if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ printk(KERN_WARNING "osst: Copy_to_buffer overflow (left %d at sg %d).\n", do_count, i); return (-EIO); } return 0; } /* Copy a osst 32K block of memory from the buffer. Returns zero (success) or negative error code. */ static int osst_copy_from_buffer(OSST_buffer *st_bp, unsigned char *ptr) { int i, cnt, do_count = OS_DATA_SIZE; for (i = 0; i < st_bp->sg_segs && do_count > 0; i++) { cnt = st_bp->sg[i].length < do_count ? st_bp->sg[i].length : do_count ; memcpy(ptr, st_bp->sg[i].address, cnt); do_count -= cnt; ptr += cnt; } if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ printk(KERN_WARNING "osst: Copy_from_buffer overflow (left %d at sg %d).\n", do_count, i); return (-EIO); } return 0; } /* Module housekeeping */ static void validate_options (void) { if (buffer_kbs > 0) osst_buffer_size = buffer_kbs * ST_KILOBYTE; if (write_threshold_kbs > 0) osst_write_threshold = write_threshold_kbs * ST_KILOBYTE; if (osst_write_threshold > osst_buffer_size) osst_write_threshold = osst_buffer_size; if (max_buffers > 0) osst_max_buffers = max_buffers; if (max_sg_segs >= OSST_FIRST_SG) osst_max_sg_segs = max_sg_segs; printk(KERN_INFO "osst: bufsize %d, wrt %d, max buffers %d, s/g segs %d.\n", osst_buffer_size, osst_write_threshold, osst_max_buffers, osst_max_sg_segs); //printk(OSST_DEB_MSG "osst: sizeof(header) = %d (%s)\n",sizeof(os_header_t),sizeof(os_header_t)==OS_DATA_SIZE?"ok":"error"); } #ifndef MODULE /* Set the boot options. Syntax: osst=xxx,yyy,... where xxx is buffer size in 1024 byte blocks and yyy is write threshold in 1024 byte blocks. */ static int __init osst_setup (char *str) { int i, ints[5]; char *stp; stp = get_options(str, ARRAY_SIZE(ints), ints); if (ints[0] > 0) { for (i = 0; i < ints[0] && i < ARRAY_SIZE(parms); i++) *parms[i].val = ints[i + 1]; } else { while (stp != NULL) { for (i = 0; i < ARRAY_SIZE(parms); i++) { int len = strlen(parms[i].name); if (!strncmp(stp, parms[i].name, len) && (*(stp + len) == ':' || *(stp + len) == '=')) { *parms[i].val = simple_strtoul(stp + len + 1, NULL, 0); break; } } if (i >= sizeof(parms) / sizeof(struct osst_dev_parm)) printk(KERN_WARNING "osst: illegal parameter in '%s'\n", stp); stp = strchr(stp, ','); if (stp) stp++; } } return 1; } __setup("osst=", osst_setup); #endif static struct file_operations osst_fops = { read: osst_read, write: osst_write, ioctl: osst_ioctl, open: os_scsi_tape_open, flush: os_scsi_tape_flush, release: os_scsi_tape_close, }; static int osst_supports(Scsi_Device * SDp) { struct osst_support_data { char *vendor; char *model; char *rev; char *driver_hint; /* Name of the correct driver, NULL if unknown */ }; static struct osst_support_data support_list[] = { /* {"XXX", "Yy-", "", NULL}, example */ SIGS_FROM_OSST, {NULL, }}; struct osst_support_data *rp; /* We are willing to drive OnStream SC-x0 as well as the * * IDE, ParPort, FireWire, USB variants, if accessible by * * emulation layer (ide-scsi, usb-storage, ...) */ for (rp=&(support_list[0]); rp->vendor != NULL; rp++) if (!strncmp(rp->vendor, SDp->vendor, strlen(rp->vendor)) && !strncmp(rp->model, SDp->model, strlen(rp->model)) && !strncmp(rp->rev, SDp->rev, strlen(rp->rev))) return 1; return 0; } static int osst_attach(Scsi_Device * SDp) { OS_Scsi_Tape * tpnt; ST_mode * STm; ST_partstat * STps; int i; #ifdef CONFIG_DEVFS_FS int mode; #endif if (SDp->type != TYPE_TAPE || !osst_supports(SDp)) return 1; if (osst_template.nr_dev >= osst_template.dev_max) { SDp->attached--; return 1; } /* find a free minor number */ for (i=0; os_scsi_tapes[i] && i= osst_template.dev_max) panic ("Scsi_devices corrupt (osst)"); /* allocate a OS_Scsi_Tape for this device */ tpnt = (OS_Scsi_Tape *)kmalloc(sizeof(OS_Scsi_Tape), GFP_ATOMIC); if (tpnt == NULL) { SDp->attached--; printk(KERN_ERR "osst: Can't allocate device descriptor.\n"); return 1; } memset(tpnt, 0, sizeof(OS_Scsi_Tape)); os_scsi_tapes[i] = tpnt; tpnt->capacity = 0xfffff; /* allocate a buffer for this device */ if (!new_tape_buffer(TRUE, TRUE)) printk(KERN_ERR "osst: Unable to allocate a tape buffer.\n"); #ifdef CONFIG_DEVFS_FS for (mode = 0; mode < ST_NBR_MODES; ++mode) { char name[8]; static char *formats[ST_NBR_MODES] ={"", "l", "m", "a"}; /* Rewind entry */ sprintf (name, "mt%s", formats[mode]); # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) tpnt->de_r[mode] = devfs_register (SDp->de, name, DEVFS_FL_DEFAULT, MAJOR_NR, i + (mode << 5), S_IFCHR | S_IRUGO | S_IWUGO, &osst_fops, NULL); # else tpnt->de_r[mode] = devfs_register (SDp->de, name, 0, DEVFS_FL_DEFAULT, MAJOR_NR, i + (mode << 5), S_IFCHR | S_IRUGO | S_IWUGO, 0, 0, &osst_fops, NULL); # endif /* No-rewind entry */ sprintf (name, "mt%sn", formats[mode]); # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) tpnt->de_n[mode] = devfs_register (SDp->de, name, DEVFS_FL_DEFAULT, MAJOR_NR, i + (mode << 5) + 128, S_IFCHR | S_IRUGO | S_IWUGO, &osst_fops, NULL); # else tpnt->de_n[mode] = devfs_register (SDp->de, name, 0, DEVFS_FL_DEFAULT, MAJOR_NR, i + (mode << 5) + 128, S_IFCHR | S_IRUGO | S_IWUGO, 0, 0, &osst_fops, NULL); # endif } devfs_register_tape (tpnt->de_r[0]); #endif tpnt->device = SDp; tpnt->devt = MKDEV(MAJOR_NR, i); tpnt->dirty = 0; tpnt->in_use = 0; tpnt->drv_buffer = 1; /* Try buffering if no mode sense */ tpnt->restr_dma = (SDp->host)->unchecked_isa_dma; tpnt->density = 0; tpnt->do_auto_lock = OSST_AUTO_LOCK; tpnt->can_bsr = OSST_IN_FILE_POS; tpnt->can_partitions = 0; tpnt->two_fm = OSST_TWO_FM; tpnt->fast_mteom = OSST_FAST_MTEOM; tpnt->scsi2_logical = OSST_SCSI2LOGICAL; /* FIXME */ tpnt->write_threshold = osst_write_threshold; tpnt->default_drvbuffer = 0xff; /* No forced buffering */ tpnt->partition = 0; tpnt->new_partition = 0; tpnt->nbr_partitions = 0; tpnt->timeout = OSST_TIMEOUT; tpnt->long_timeout = OSST_LONG_TIMEOUT; /* Recognize OnStream tapes */ printk ("osst%i: Tape driver with OnStream support osst %s\nosst%i: %s\n", i, osst_version, i, cvsid); /* We don't need to test for OnStream, as this has been done in detect () */ tpnt->os_fw_rev = osst_parse_firmware_rev (SDp->rev); #if DEBUG printk ("osst%i: OnStream tape drive recognized, Model %s\n", i, SDp->model); #endif tpnt->omit_blklims = 1; tpnt->poll = (strncmp(SDp->model, "DI-", 3) == 0) || OSST_FW_NEED_POLL(tpnt->os_fw_rev,SDp); tpnt->logical_blk_in_buffer = 0; tpnt->header_ok = 0; tpnt->linux_media = 0; tpnt->header_cache = NULL; for (i=0; i < ST_NBR_MODES; i++) { STm = &(tpnt->modes[i]); STm->defined = FALSE; STm->sysv = OSST_SYSV; STm->defaults_for_writes = 0; STm->do_async_writes = OSST_ASYNC_WRITES; STm->do_buffer_writes = OSST_BUFFER_WRITES; STm->do_read_ahead = OSST_READ_AHEAD; STm->default_compression = ST_DONT_TOUCH; STm->default_blksize = 32 * ST_KILOBYTE; /* No forced size */ STm->default_density = (-1); /* No forced density */ } for (i=0; i < ST_NBR_PARTITIONS; i++) { STps = &(tpnt->ps[i]); STps->rw = ST_IDLE; STps->eof = ST_NOEOF; STps->at_sm = 0; STps->last_block_valid = FALSE; STps->drv_block = (-1); STps->drv_file = (-1); } tpnt->current_mode = 0; tpnt->modes[0].defined = TRUE; tpnt->density_changed = tpnt->compression_changed = tpnt->blksize_changed = FALSE; init_MUTEX(&tpnt->lock); osst_template.nr_dev++; return 0; }; static int osst_detect(Scsi_Device * SDp) { if (SDp->type != TYPE_TAPE) return 0; if ( ! osst_supports(SDp) ) return 0; printk(KERN_WARNING "Detected OnStream scsi tape osst%d at scsi%d, channel %d, id %d, lun %d\n", osst_template.dev_noticed++, SDp->host->host_no, SDp->channel, SDp->id, SDp->lun); return 1; } static int osst_registered = 0; /* Driver initialization (not __initfunc because may be called later) */ static int osst_init() { int i; if (osst_template.dev_noticed == 0) return 0; if(!osst_registered) { #ifdef CONFIG_DEVFS_FS if (devfs_register_chrdev(MAJOR_NR,"osst",&osst_fops)) { #else if (register_chrdev(MAJOR_NR,"osst",&osst_fops)) { #endif printk(KERN_ERR "osst: Unable to get major %d for OnStream tapes\n",MAJOR_NR); return 1; } osst_registered++; } if (os_scsi_tapes) return 0; osst_template.dev_max = OSST_MAX_TAPES; if (osst_template.dev_max > 128 / ST_NBR_MODES) printk(KERN_INFO "osst: Only %d tapes accessible.\n", 128 / ST_NBR_MODES); os_scsi_tapes = (OS_Scsi_Tape **)kmalloc(osst_template.dev_max * sizeof(OS_Scsi_Tape *), GFP_ATOMIC); if (os_scsi_tapes == NULL) { printk(KERN_ERR "osst: Unable to allocate array for OnStream SCSI tapes.\n"); #ifdef CONFIG_DEVFS_FS devfs_unregister_chrdev(MAJOR_NR, "osst"); #else unregister_chrdev(MAJOR_NR, "osst"); #endif return 1; } for (i=0; i < osst_template.dev_max; ++i) os_scsi_tapes[i] = NULL; /* Allocate the buffer pointers */ osst_buffers = (OSST_buffer **)kmalloc(osst_template.dev_max * sizeof(OSST_buffer *), GFP_ATOMIC); if (osst_buffers == NULL) { printk(KERN_ERR "osst: Unable to allocate tape buffer pointers.\n"); #ifdef CONFIG_DEVFS_FS devfs_unregister_chrdev(MAJOR_NR, "osst"); #else unregister_chrdev(MAJOR_NR, "osst"); #endif kfree(os_scsi_tapes); return 1; } osst_nbr_buffers = 0; #if DEBUG printk(OSST_DEB_MSG "osst: Buffer size %d bytes, write threshold %d bytes.\n", osst_buffer_size, osst_write_threshold); #endif return 0; } static void osst_detach(Scsi_Device * SDp) { OS_Scsi_Tape * tpnt; int i; #ifdef CONFIG_DEVFS_FS int mode; #endif for(i=0; idevice == SDp) { tpnt->device = NULL; #ifdef CONFIG_DEVFS_FS for (mode = 0; mode < ST_NBR_MODES; ++mode) { devfs_unregister (tpnt->de_r[mode]); tpnt->de_r[mode] = NULL; devfs_unregister (tpnt->de_n[mode]); tpnt->de_n[mode] = NULL; } #endif kfree(tpnt); os_scsi_tapes[i] = NULL; SDp->attached--; osst_template.nr_dev--; osst_template.dev_noticed--; return; } } return; } static int __init init_osst(void) { validate_options(); osst_template.module = THIS_MODULE; return scsi_register_module(MODULE_SCSI_DEV, &osst_template); } static void __exit exit_osst (void) { int i; OS_Scsi_Tape * STp; scsi_unregister_module(MODULE_SCSI_DEV, &osst_template); #ifdef CONFIG_DEVFS_FS devfs_unregister_chrdev(MAJOR_NR, "osst"); #else unregister_chrdev(MAJOR_NR, "osst"); #endif osst_registered--; if(os_scsi_tapes != NULL) { for (i=0; i < osst_template.dev_max; ++i) { if ((STp = os_scsi_tapes[i])) { if (STp->header_cache != NULL) vfree(STp->header_cache); kfree(STp); } } kfree(os_scsi_tapes); if (osst_buffers != NULL) { for (i=0; i < osst_nbr_buffers; i++) if (osst_buffers[i] != NULL) { osst_buffers[i]->orig_sg_segs = 0; normalize_buffer(osst_buffers[i]); kfree(osst_buffers[i]); } kfree(osst_buffers); } } osst_template.dev_max = 0; printk(KERN_INFO "osst: Unloaded.\n"); } module_init(init_osst); module_exit(exit_osst);