| /* |
| SCSI Tape Driver for Linux version 1.1 and newer. See the accompanying |
| file Documentation/scsi/st.txt for more information. |
| |
| History: |
| |
| OnStream SCSI Tape support (osst) cloned from st.c by |
| Willem Riede (osst@riede.org) Feb 2000 |
| Fixes ... Kurt Garloff <garloff@suse.de> 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 - 2002 Kai Makisara / 2000 - 2006 Willem Riede |
| email osst@riede.org |
| |
| $Header: /cvsroot/osst/Driver/osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $ |
| |
| Microscopic alterations - Rik Ling, 2000/12/21 |
| Last st.c sync: Tue Oct 15 22:01:04 2002 by makisara |
| Some small formal changes - aeb, 950809 |
| */ |
| |
| static const char * cvsid = "$Id: osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $"; |
| static const char * osst_version = "0.99.4"; |
| |
| /* The "failure to reconnect" firmware bug */ |
| #define OSST_FW_NEED_POLL_MIN 10601 /*(107A)*/ |
| #define OSST_FW_NEED_POLL_MAX 10704 /*(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 <linux/module.h> |
| |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/sched/signal.h> |
| #include <linux/proc_fs.h> |
| #include <linux/mm.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/mtio.h> |
| #include <linux/ioctl.h> |
| #include <linux/fcntl.h> |
| #include <linux/spinlock.h> |
| #include <linux/vmalloc.h> |
| #include <linux/blkdev.h> |
| #include <linux/moduleparam.h> |
| #include <linux/delay.h> |
| #include <linux/jiffies.h> |
| #include <linux/mutex.h> |
| #include <linux/uaccess.h> |
| #include <asm/dma.h> |
| |
| /* 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 |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_dbg.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_driver.h> |
| #include <scsi/scsi_eh.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_ioctl.h> |
| |
| #define ST_KILOBYTE 1024 |
| |
| #include "st.h" |
| #include "osst.h" |
| #include "osst_options.h" |
| #include "osst_detect.h" |
| |
| static DEFINE_MUTEX(osst_int_mutex); |
| static int max_dev = 0; |
| static int write_threshold_kbs = 0; |
| static int max_sg_segs = 0; |
| |
| #ifdef MODULE |
| MODULE_AUTHOR("Willem Riede"); |
| MODULE_DESCRIPTION("OnStream {DI-|FW-|SC-|USB}{30|50} Tape Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_CHARDEV_MAJOR(OSST_MAJOR); |
| MODULE_ALIAS_SCSI_DEVICE(TYPE_TAPE); |
| |
| module_param(max_dev, int, 0444); |
| MODULE_PARM_DESC(max_dev, "Maximum number of OnStream Tape Drives to attach (4)"); |
| |
| module_param(write_threshold_kbs, int, 0644); |
| MODULE_PARM_DESC(write_threshold_kbs, "Asynchronous write threshold (KB; 32)"); |
| |
| module_param(max_sg_segs, int, 0644); |
| MODULE_PARM_DESC(max_sg_segs, "Maximum number of scatter/gather segments to use (9)"); |
| #else |
| static struct osst_dev_parm { |
| char *name; |
| int *val; |
| } parms[] __initdata = { |
| { "max_dev", &max_dev }, |
| { "write_threshold_kbs", &write_threshold_kbs }, |
| { "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; |
| /* uncomment define below to test error recovery */ |
| // #define OSST_INJECT_ERRORS 1 |
| #endif |
| |
| /* Do not retry! The drive firmware already retries when appropriate, |
| and when it tries to tell us something, we had better listen... */ |
| #define MAX_RETRIES 0 |
| |
| #define NO_TAPE NOT_READY |
| |
| #define OSST_WAIT_POSITION_COMPLETE (HZ > 200 ? HZ / 200 : 1) |
| #define OSST_WAIT_WRITE_COMPLETE (HZ / 12) |
| #define OSST_WAIT_LONG_WRITE_COMPLETE (HZ / 2) |
| |
| #define OSST_TIMEOUT (200 * HZ) |
| #define OSST_LONG_TIMEOUT (1800 * HZ) |
| |
| #define TAPE_NR(x) (iminor(x) & ~(-1 << ST_MODE_SHIFT)) |
| #define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT) |
| #define TAPE_REWIND(x) ((iminor(x) & 0x80) == 0) |
| #define TAPE_IS_RAW(x) (TAPE_MODE(x) & (ST_NBR_MODES >> 1)) |
| |
| /* Internal ioctl to set both density (uppermost 8 bits) and blocksize (lower |
| 24 bits) */ |
| #define SET_DENS_AND_BLK 0x10001 |
| |
| static int osst_buffer_size = OSST_BUFFER_SIZE; |
| static int osst_write_threshold = OSST_WRITE_THRESHOLD; |
| static int osst_max_sg_segs = OSST_MAX_SG; |
| static int osst_max_dev = OSST_MAX_TAPES; |
| static int osst_nr_dev; |
| |
| static struct osst_tape **os_scsi_tapes = NULL; |
| static DEFINE_RWLOCK(os_scsi_tapes_lock); |
| |
| static int modes_defined = 0; |
| |
| static struct osst_buffer *new_tape_buffer(int, int, int); |
| static int enlarge_buffer(struct osst_buffer *, int); |
| static void normalize_buffer(struct osst_buffer *); |
| static int append_to_buffer(const char __user *, struct osst_buffer *, int); |
| static int from_buffer(struct osst_buffer *, char __user *, int); |
| static int osst_zero_buffer_tail(struct osst_buffer *); |
| static int osst_copy_to_buffer(struct osst_buffer *, unsigned char *); |
| static int osst_copy_from_buffer(struct osst_buffer *, unsigned char *); |
| |
| static int osst_probe(struct device *); |
| static int osst_remove(struct device *); |
| |
| static struct scsi_driver osst_template = { |
| .gendrv = { |
| .name = "osst", |
| .owner = THIS_MODULE, |
| .probe = osst_probe, |
| .remove = osst_remove, |
| } |
| }; |
| |
| static int osst_int_ioctl(struct osst_tape *STp, struct osst_request ** aSRpnt, |
| unsigned int cmd_in, unsigned long arg); |
| |
| static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int frame, int skip); |
| |
| static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt); |
| |
| static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt); |
| |
| static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending); |
| |
| static inline char *tape_name(struct osst_tape *tape) |
| { |
| return tape->drive->disk_name; |
| } |
| |
| /* Routines that handle the interaction with mid-layer SCSI routines */ |
| |
| |
| /* Normalize Sense */ |
| static void osst_analyze_sense(struct osst_request *SRpnt, struct st_cmdstatus *s) |
| { |
| const u8 *ucp; |
| const u8 *sense = SRpnt->sense; |
| |
| s->have_sense = scsi_normalize_sense(SRpnt->sense, |
| SCSI_SENSE_BUFFERSIZE, &s->sense_hdr); |
| s->flags = 0; |
| |
| if (s->have_sense) { |
| s->deferred = 0; |
| s->remainder_valid = |
| scsi_get_sense_info_fld(sense, SCSI_SENSE_BUFFERSIZE, &s->uremainder64); |
| switch (sense[0] & 0x7f) { |
| case 0x71: |
| s->deferred = 1; |
| case 0x70: |
| s->fixed_format = 1; |
| s->flags = sense[2] & 0xe0; |
| break; |
| case 0x73: |
| s->deferred = 1; |
| case 0x72: |
| s->fixed_format = 0; |
| ucp = scsi_sense_desc_find(sense, SCSI_SENSE_BUFFERSIZE, 4); |
| s->flags = ucp ? (ucp[3] & 0xe0) : 0; |
| break; |
| } |
| } |
| } |
| |
| /* Convert the result to success code */ |
| static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt) |
| { |
| char *name = tape_name(STp); |
| int result = SRpnt->result; |
| u8 * sense = SRpnt->sense, scode; |
| #if DEBUG |
| const char *stp; |
| #endif |
| struct st_cmdstatus *cmdstatp; |
| |
| if (!result) |
| return 0; |
| |
| cmdstatp = &STp->buffer->cmdstat; |
| osst_analyze_sense(SRpnt, cmdstatp); |
| |
| if (cmdstatp->have_sense) |
| scode = STp->buffer->cmdstat.sense_hdr.sense_key; |
| else |
| scode = 0; |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG "%s:D: Error: %x, cmd: %x %x %x %x %x %x\n", |
| name, result, |
| SRpnt->cmd[0], SRpnt->cmd[1], SRpnt->cmd[2], |
| SRpnt->cmd[3], SRpnt->cmd[4], SRpnt->cmd[5]); |
| if (scode) printk(OSST_DEB_MSG "%s:D: Sense: %02x, ASC: %02x, ASCQ: %02x\n", |
| name, scode, sense[12], sense[13]); |
| if (cmdstatp->have_sense) |
| __scsi_print_sense(STp->device, name, |
| SRpnt->sense, SCSI_SENSE_BUFFERSIZE); |
| } |
| else |
| #endif |
| if (cmdstatp->have_sense && ( |
| scode != NO_SENSE && |
| scode != RECOVERED_ERROR && |
| /* scode != UNIT_ATTENTION && */ |
| scode != BLANK_CHECK && |
| scode != VOLUME_OVERFLOW && |
| SRpnt->cmd[0] != MODE_SENSE && |
| SRpnt->cmd[0] != TEST_UNIT_READY)) { /* Abnormal conditions for tape */ |
| if (cmdstatp->have_sense) { |
| printk(KERN_WARNING "%s:W: Command with sense data:\n", name); |
| __scsi_print_sense(STp->device, name, |
| SRpnt->sense, SCSI_SENSE_BUFFERSIZE); |
| } |
| else { |
| static int notyetprinted = 1; |
| |
| printk(KERN_WARNING |
| "%s:W: Warning %x (driver bt 0x%x, host bt 0x%x).\n", |
| name, result, driver_byte(result), |
| host_byte(result)); |
| if (notyetprinted) { |
| notyetprinted = 0; |
| printk(KERN_INFO |
| "%s:I: This warning may be caused by your scsi controller,\n", name); |
| printk(KERN_INFO |
| "%s:I: it has been reported with some Buslogic cards.\n", name); |
| } |
| } |
| } |
| STp->pos_unknown |= STp->device->was_reset; |
| |
| if (cmdstatp->have_sense && scode == RECOVERED_ERROR) { |
| STp->recover_count++; |
| STp->recover_erreg++; |
| #if DEBUG |
| if (debugging) { |
| if (SRpnt->cmd[0] == READ_6) |
| stp = "read"; |
| else if (SRpnt->cmd[0] == WRITE_6) |
| stp = "write"; |
| else |
| stp = "ioctl"; |
| printk(OSST_DEB_MSG "%s:D: Recovered %s error (%d).\n", name, stp, |
| STp->recover_count); |
| } |
| #endif |
| if ((sense[2] & 0xe0) == 0) |
| return 0; |
| } |
| return (-EIO); |
| } |
| |
| |
| /* Wakeup from interrupt */ |
| static void osst_end_async(struct request *req, blk_status_t status) |
| { |
| struct scsi_request *rq = scsi_req(req); |
| struct osst_request *SRpnt = req->end_io_data; |
| struct osst_tape *STp = SRpnt->stp; |
| struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; |
| |
| STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result; |
| #if DEBUG |
| STp->write_pending = 0; |
| #endif |
| if (rq->sense_len) |
| memcpy(SRpnt->sense, rq->sense, SCSI_SENSE_BUFFERSIZE); |
| if (SRpnt->waiting) |
| complete(SRpnt->waiting); |
| |
| if (SRpnt->bio) { |
| kfree(mdata->pages); |
| blk_rq_unmap_user(SRpnt->bio); |
| } |
| |
| __blk_put_request(req->q, req); |
| } |
| |
| /* osst_request memory management */ |
| static struct osst_request *osst_allocate_request(void) |
| { |
| return kzalloc(sizeof(struct osst_request), GFP_KERNEL); |
| } |
| |
| static void osst_release_request(struct osst_request *streq) |
| { |
| kfree(streq); |
| } |
| |
| static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd, |
| int cmd_len, int data_direction, void *buffer, unsigned bufflen, |
| int use_sg, int timeout, int retries) |
| { |
| struct request *req; |
| struct scsi_request *rq; |
| struct page **pages = NULL; |
| struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; |
| |
| int err = 0; |
| int write = (data_direction == DMA_TO_DEVICE); |
| |
| req = blk_get_request(SRpnt->stp->device->request_queue, |
| write ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, GFP_KERNEL); |
| if (IS_ERR(req)) |
| return DRIVER_ERROR << 24; |
| |
| rq = scsi_req(req); |
| req->rq_flags |= RQF_QUIET; |
| |
| SRpnt->bio = NULL; |
| |
| if (use_sg) { |
| struct scatterlist *sg, *sgl = (struct scatterlist *)buffer; |
| int i; |
| |
| pages = kzalloc(use_sg * sizeof(struct page *), GFP_KERNEL); |
| if (!pages) |
| goto free_req; |
| |
| for_each_sg(sgl, sg, use_sg, i) |
| pages[i] = sg_page(sg); |
| |
| mdata->null_mapped = 1; |
| |
| mdata->page_order = get_order(sgl[0].length); |
| mdata->nr_entries = |
| DIV_ROUND_UP(bufflen, PAGE_SIZE << mdata->page_order); |
| mdata->offset = 0; |
| |
| err = blk_rq_map_user(req->q, req, mdata, NULL, bufflen, GFP_KERNEL); |
| if (err) { |
| kfree(pages); |
| goto free_req; |
| } |
| SRpnt->bio = req->bio; |
| mdata->pages = pages; |
| |
| } else if (bufflen) { |
| err = blk_rq_map_kern(req->q, req, buffer, bufflen, GFP_KERNEL); |
| if (err) |
| goto free_req; |
| } |
| |
| rq->cmd_len = cmd_len; |
| memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ |
| memcpy(rq->cmd, cmd, rq->cmd_len); |
| req->timeout = timeout; |
| rq->retries = retries; |
| req->end_io_data = SRpnt; |
| |
| blk_execute_rq_nowait(req->q, NULL, req, 1, osst_end_async); |
| return 0; |
| free_req: |
| blk_put_request(req); |
| return DRIVER_ERROR << 24; |
| } |
| |
| /* 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 struct osst_request * osst_do_scsi(struct osst_request *SRpnt, struct osst_tape *STp, |
| unsigned char *cmd, int bytes, int direction, int timeout, int retries, int do_wait) |
| { |
| unsigned char *bp; |
| unsigned short use_sg; |
| #ifdef OSST_INJECT_ERRORS |
| static int inject = 0; |
| static int repeat = 0; |
| #endif |
| struct completion *waiting; |
| |
| /* if async, make sure there's no command outstanding */ |
| if (!do_wait && ((STp->buffer)->last_SRpnt)) { |
| printk(KERN_ERR "%s: Async command already active.\n", |
| tape_name(STp)); |
| if (signal_pending(current)) |
| (STp->buffer)->syscall_result = (-EINTR); |
| else |
| (STp->buffer)->syscall_result = (-EBUSY); |
| return NULL; |
| } |
| |
| if (SRpnt == NULL) { |
| SRpnt = osst_allocate_request(); |
| if (SRpnt == NULL) { |
| printk(KERN_ERR "%s: Can't allocate SCSI request.\n", |
| tape_name(STp)); |
| if (signal_pending(current)) |
| (STp->buffer)->syscall_result = (-EINTR); |
| else |
| (STp->buffer)->syscall_result = (-EBUSY); |
| return NULL; |
| } |
| SRpnt->stp = STp; |
| } |
| |
| /* If async IO, set last_SRpnt. This ptr tells write_behind_check |
| which IO is outstanding. It's nulled out when the IO completes. */ |
| if (!do_wait) |
| (STp->buffer)->last_SRpnt = SRpnt; |
| |
| waiting = &STp->wait; |
| init_completion(waiting); |
| SRpnt->waiting = waiting; |
| |
| use_sg = (bytes > STp->buffer->sg[0].length) ? STp->buffer->use_sg : 0; |
| if (use_sg) { |
| bp = (char *)&(STp->buffer->sg[0]); |
| if (STp->buffer->sg_segs < use_sg) |
| use_sg = STp->buffer->sg_segs; |
| } |
| else |
| bp = (STp->buffer)->b_data; |
| |
| memcpy(SRpnt->cmd, cmd, sizeof(SRpnt->cmd)); |
| STp->buffer->cmdstat.have_sense = 0; |
| STp->buffer->syscall_result = 0; |
| |
| if (osst_execute(SRpnt, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, |
| use_sg, timeout, retries)) |
| /* could not allocate the buffer or request was too large */ |
| (STp->buffer)->syscall_result = (-EBUSY); |
| else if (do_wait) { |
| wait_for_completion(waiting); |
| SRpnt->waiting = NULL; |
| STp->buffer->syscall_result = osst_chk_result(STp, SRpnt); |
| #ifdef OSST_INJECT_ERRORS |
| 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 "%s:D: Injecting read error\n", tape_name(STp)); |
| STp->buffer->last_result_fatal = 1; |
| } |
| #endif |
| } |
| return SRpnt; |
| } |
| |
| |
| /* Handle the write-behind checking (downs the semaphore) */ |
| static void osst_write_behind_check(struct osst_tape *STp) |
| { |
| struct osst_buffer * STbuffer; |
| |
| STbuffer = STp->buffer; |
| |
| #if DEBUG |
| if (STp->write_pending) |
| STp->nbr_waits++; |
| else |
| STp->nbr_finished++; |
| #endif |
| wait_for_completion(&(STp->wait)); |
| STp->buffer->last_SRpnt->waiting = 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++; |
| |
| osst_release_request(STp->buffer->last_SRpnt); |
| |
| if (STbuffer->writing < STbuffer->buffer_bytes) |
| printk(KERN_WARNING "osst :A: write_behind_check: something left in buffer!\n"); |
| |
| STbuffer->last_SRpnt = NULL; |
| STbuffer->buffer_bytes -= STbuffer->writing; |
| STbuffer->writing = 0; |
| |
| return; |
| } |
| |
| |
| |
| /* Onstream specific Routines */ |
| /* |
| * Initialize the OnStream AUX |
| */ |
| static void osst_init_aux(struct osst_tape * STp, int frame_type, int frame_seq_number, |
| int logical_blk_num, int blk_sz, int blk_cnt) |
| { |
| 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(blk_sz); |
| dat->dat_list[0].blk_cnt = htons(blk_cnt); |
| 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(frame_seq_number); |
| aux->logical_blk_num_high = htonl(0); |
| aux->logical_blk_num = htonl(logical_blk_num); |
| break; |
| default: ; /* probably FILL */ |
| } |
| aux->filemark_cnt = htonl(STp->filemark_cnt); |
| aux->phys_fm = htonl(0xffffffff); |
| aux->last_mark_ppos = htonl(STp->last_mark_ppos); |
| aux->last_mark_lbn = htonl(STp->last_mark_lbn); |
| } |
| |
| /* |
| * Verify that we have the correct tape frame |
| */ |
| static int osst_verify_frame(struct osst_tape * STp, int frame_seq_number, int quiet) |
| { |
| char * name = tape_name(STp); |
| os_aux_t * aux = STp->buffer->aux; |
| os_partition_t * par = &(aux->partition); |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| unsigned int blk_cnt, blk_sz, i; |
| |
| if (STp->raw) { |
| if (STp->buffer->syscall_result) { |
| for (i=0; i < STp->buffer->sg_segs; i++) |
| memset(page_address(sg_page(&STp->buffer->sg[i])), |
| 0, STp->buffer->sg[i].length); |
| strcpy(STp->buffer->b_data, "READ ERROR ON FRAME"); |
| } else |
| STp->buffer->buffer_bytes = OS_FRAME_SIZE; |
| return 1; |
| } |
| if (STp->buffer->syscall_result) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, read error\n", name); |
| #endif |
| return 0; |
| } |
| if (ntohl(aux->format_id) != 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, format_id %u\n", name, ntohl(aux->format_id)); |
| #endif |
| goto err_out; |
| } |
| if (memcmp(aux->application_sig, STp->application_sig, 4) != 0 && |
| (memcmp(aux->application_sig, "LIN3", 4) != 0 || STp->linux_media_version != 4)) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, incorrect application signature\n", name); |
| #endif |
| goto err_out; |
| } |
| if (par->partition_num != OS_DATA_PARTITION) { |
| if (!STp->linux_media || STp->linux_media_version != 2) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, partition num %d\n", |
| name, par->partition_num); |
| #endif |
| goto err_out; |
| } |
| } |
| if (par->par_desc_ver != OS_PARTITION_VERSION) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, partition version %d\n", name, par->par_desc_ver); |
| #endif |
| goto err_out; |
| } |
| if (ntohs(par->wrt_pass_cntr) != STp->wrt_pass_cntr) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, wrt_pass_cntr %d (expected %d)\n", |
| name, ntohs(par->wrt_pass_cntr), STp->wrt_pass_cntr); |
| #endif |
| goto err_out; |
| } |
| if (aux->frame_type != OS_FRAME_TYPE_DATA && |
| aux->frame_type != OS_FRAME_TYPE_EOD && |
| aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| if (!quiet) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, frame type %x\n", name, aux->frame_type); |
| #endif |
| } |
| goto err_out; |
| } |
| if (aux->frame_type == OS_FRAME_TYPE_EOD && |
| STp->first_frame_position < STp->eod_frame_ppos) { |
| printk(KERN_INFO "%s:I: Skipping premature EOD frame %d\n", name, |
| STp->first_frame_position); |
| goto err_out; |
| } |
| if (frame_seq_number != -1 && ntohl(aux->frame_seq_num) != frame_seq_number) { |
| if (!quiet) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame, sequence number %u (expected %d)\n", |
| name, ntohl(aux->frame_seq_num), frame_seq_number); |
| #endif |
| } |
| goto err_out; |
| } |
| 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 DEBUG |
| printk(OSST_DEB_MSG "%s:D: %s filemark %d at frame pos %d\n", name, |
| 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; |
| STp->frame_in_buffer = 1; |
| } |
| if (aux->frame_type == OS_FRAME_TYPE_DATA) { |
| blk_cnt = ntohs(aux->dat.dat_list[0].blk_cnt); |
| blk_sz = ntohl(aux->dat.dat_list[0].blk_sz); |
| STp->buffer->buffer_bytes = blk_cnt * blk_sz; |
| STp->buffer->read_pointer = 0; |
| STp->frame_in_buffer = 1; |
| |
| /* See what block size was used to write file */ |
| if (STp->block_size != blk_sz && blk_sz > 0) { |
| printk(KERN_INFO |
| "%s:I: File was written with block size %d%c, currently %d%c, adjusted to match.\n", |
| name, blk_sz<1024?blk_sz:blk_sz/1024,blk_sz<1024?'b':'k', |
| STp->block_size<1024?STp->block_size:STp->block_size/1024, |
| STp->block_size<1024?'b':'k'); |
| STp->block_size = blk_sz; |
| STp->buffer->buffer_blocks = OS_DATA_SIZE / blk_sz; |
| } |
| STps->eof = ST_NOEOF; |
| } |
| STp->frame_seq_number = ntohl(aux->frame_seq_num); |
| STp->logical_blk_num = ntohl(aux->logical_blk_num); |
| return 1; |
| |
| err_out: |
| if (STp->read_error_frame == 0) |
| STp->read_error_frame = STp->first_frame_position - 1; |
| return 0; |
| } |
| |
| /* |
| * Wait for the unit to become Ready |
| */ |
| static int osst_wait_ready(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| unsigned timeout, int initial_delay) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| unsigned long startwait = jiffies; |
| #if DEBUG |
| int dbg = debugging; |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG "%s:D: Reached onstream wait ready\n", name); |
| #endif |
| |
| if (initial_delay > 0) |
| msleep(jiffies_to_msecs(initial_delay)); |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = TEST_UNIT_READY; |
| |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| *aSRpnt = SRpnt; |
| if (!SRpnt) return (-EBUSY); |
| |
| while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && |
| (( SRpnt->sense[2] == 2 && SRpnt->sense[12] == 4 && |
| (SRpnt->sense[13] == 1 || SRpnt->sense[13] == 8) ) || |
| ( SRpnt->sense[2] == 6 && SRpnt->sense[12] == 0x28 && |
| SRpnt->sense[13] == 0 ) )) { |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG "%s:D: Sleeping in onstream wait ready\n", name); |
| printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| debugging = 0; |
| } |
| #endif |
| msleep(100); |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = TEST_UNIT_READY; |
| |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| } |
| *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 "%s:D: Abnormal exit from onstream wait ready\n", name); |
| printk(OSST_DEB_MSG "%s:D: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", name, |
| STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2], |
| SRpnt->sense[12], SRpnt->sense[13]); |
| #endif |
| return (-EIO); |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Normal exit from onstream wait ready\n", name); |
| #endif |
| return 0; |
| } |
| |
| /* |
| * Wait for a tape to be inserted in the unit |
| */ |
| static int osst_wait_for_medium(struct osst_tape * STp, struct osst_request ** aSRpnt, unsigned timeout) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| unsigned long startwait = jiffies; |
| #if DEBUG |
| int dbg = debugging; |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG "%s:D: Reached onstream wait for medium\n", name); |
| #endif |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = TEST_UNIT_READY; |
| |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| *aSRpnt = SRpnt; |
| if (!SRpnt) return (-EBUSY); |
| |
| while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) && |
| SRpnt->sense[2] == 2 && SRpnt->sense[12] == 0x3a && SRpnt->sense[13] == 0 ) { |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG "%s:D: Sleeping in onstream wait medium\n", name); |
| printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| debugging = 0; |
| } |
| #endif |
| msleep(100); |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = TEST_UNIT_READY; |
| |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| } |
| *aSRpnt = SRpnt; |
| #if DEBUG |
| debugging = dbg; |
| #endif |
| if ( STp->buffer->syscall_result && SRpnt->sense[2] != 2 && |
| SRpnt->sense[12] != 4 && SRpnt->sense[13] == 1) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Abnormal exit from onstream wait medium\n", name); |
| printk(OSST_DEB_MSG "%s:D: Result = %d, Sense: 0=%02x, 2=%02x, 12=%02x, 13=%02x\n", name, |
| STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2], |
| SRpnt->sense[12], SRpnt->sense[13]); |
| #endif |
| return 0; |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Normal exit from onstream wait medium\n", name); |
| #endif |
| return 1; |
| } |
| |
| static int osst_position_tape_and_confirm(struct osst_tape * STp, struct osst_request ** aSRpnt, int frame) |
| { |
| int retval; |
| |
| osst_wait_ready(STp, aSRpnt, 15 * 60, 0); /* 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, OSST_WAIT_POSITION_COMPLETE); |
| return (osst_get_frame_position(STp, aSRpnt)); |
| } |
| |
| /* |
| * Wait for write(s) to complete |
| */ |
| static int osst_flush_drive_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| int result = 0; |
| int delay = OSST_WAIT_WRITE_COMPLETE; |
| #if DEBUG |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG "%s:D: Reached onstream flush drive buffer (write filemark)\n", name); |
| #endif |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = WRITE_FILEMARKS; |
| cmd[1] = 1; |
| |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| *aSRpnt = SRpnt; |
| if (!SRpnt) return (-EBUSY); |
| if (STp->buffer->syscall_result) { |
| if ((SRpnt->sense[2] & 0x0f) == 2 && SRpnt->sense[12] == 4) { |
| if (SRpnt->sense[13] == 8) { |
| delay = OSST_WAIT_LONG_WRITE_COMPLETE; |
| } |
| } else |
| result = osst_write_error_recovery(STp, aSRpnt, 0); |
| } |
| result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay); |
| STp->ps[STp->partition].rw = OS_WRITING_COMPLETE; |
| |
| return (result); |
| } |
| |
| #define OSST_POLL_PER_SEC 10 |
| static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int curr, int minlast, int to) |
| { |
| unsigned long startwait = jiffies; |
| char * name = tape_name(STp); |
| #if DEBUG |
| char notyetprinted = 1; |
| #endif |
| if (minlast >= 0 && STp->ps[STp->partition].rw != ST_READING) |
| printk(KERN_ERR "%s:A: Waiting for frame without having initialized read!\n", name); |
| |
| 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; /* successful 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 || time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC)) |
| printk (OSST_DEB_MSG |
| "%s:D: Succ wait f fr %i (>%i): %i-%i %i (%i): %3li.%li s\n", |
| name, 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 (time_after_eq(jiffies, startwait + 2*HZ/OSST_POLL_PER_SEC) && notyetprinted) |
| { |
| printk (OSST_DEB_MSG "%s:D: Wait for frame %i (>%i): %i-%i %i (%i)\n", |
| name, curr, curr+minlast, STp->first_frame_position, |
| STp->last_frame_position, STp->cur_frames, result); |
| notyetprinted--; |
| } |
| #endif |
| msleep(1000 / OSST_POLL_PER_SEC); |
| } |
| #if DEBUG |
| printk (OSST_DEB_MSG "%s:D: Fail wait f fr %i (>%i): %i-%i %i: %3li.%li s\n", |
| name, 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; |
| } |
| |
| static int osst_recover_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int writing) |
| { |
| struct osst_request * SRpnt; |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| unsigned long startwait = jiffies; |
| int retval = 1; |
| char * name = tape_name(STp); |
| |
| if (writing) { |
| char mybuf[24]; |
| char * olddata = STp->buffer->b_data; |
| int oldsize = STp->buffer->buffer_size; |
| |
| /* write zero fm then read pos - if shows write error, try to recover - if no progress, wait */ |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = WRITE_FILEMARKS; |
| cmd[1] = 1; |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, |
| MAX_RETRIES, 1); |
| |
| while (retval && time_before (jiffies, startwait + 5*60*HZ)) { |
| |
| if (STp->buffer->syscall_result && (SRpnt->sense[2] & 0x0f) != 2) { |
| |
| /* some failure - not just not-ready */ |
| retval = osst_write_error_recovery(STp, aSRpnt, 0); |
| break; |
| } |
| schedule_timeout_interruptible(HZ / OSST_POLL_PER_SEC); |
| |
| STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24; |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = READ_POSITION; |
| |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, 20, DMA_FROM_DEVICE, STp->timeout, |
| MAX_RETRIES, 1); |
| |
| retval = ( STp->buffer->syscall_result || (STp->buffer)->b_data[15] > 25 ); |
| STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; |
| } |
| if (retval) |
| printk(KERN_ERR "%s:E: Device did not succeed to write buffered data\n", name); |
| } else |
| /* TODO - figure out which error conditions can be handled */ |
| if (STp->buffer->syscall_result) |
| printk(KERN_WARNING |
| "%s:W: Recover_wait_frame(read) cannot handle %02x:%02x:%02x\n", name, |
| (*aSRpnt)->sense[ 2] & 0x0f, |
| (*aSRpnt)->sense[12], |
| (*aSRpnt)->sense[13]); |
| |
| return retval; |
| } |
| |
| /* |
| * Read the next OnStream tape frame at the current location |
| */ |
| static int osst_read_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int timeout) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| int retval = 0; |
| #if DEBUG |
| os_aux_t * aux = STp->buffer->aux; |
| char * name = tape_name(STp); |
| #endif |
| |
| if (STp->poll) |
| if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout)) |
| retval = osst_recover_wait_frame(STp, aSRpnt, 0); |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = READ_6; |
| cmd[1] = 1; |
| cmd[4] = 1; |
| |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Reading frame from OnStream tape\n", name); |
| #endif |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| *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; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Recording read error at %d\n", name, STp->read_error_frame); |
| #endif |
| } |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Sense: %2x %2x %2x %2x %2x %2x %2x %2x\n", |
| name, |
| SRpnt->sense[0], SRpnt->sense[1], |
| SRpnt->sense[2], SRpnt->sense[3], |
| SRpnt->sense[4], SRpnt->sense[5], |
| SRpnt->sense[6], SRpnt->sense[7]); |
| #endif |
| } |
| else |
| STp->first_frame_position++; |
| #if DEBUG |
| if (debugging) { |
| char sig[8]; int i; |
| for (i=0;i<4;i++) |
| sig[i] = aux->application_sig[i]<32?'^':aux->application_sig[i]; |
| sig[4] = '\0'; |
| printk(OSST_DEB_MSG |
| "%s:D: AUX: %s UpdFrCt#%d Wpass#%d %s FrSeq#%d LogBlk#%d Qty=%d Sz=%d\n", name, sig, |
| ntohl(aux->update_frame_cntr), ntohs(aux->partition.wrt_pass_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), |
| ntohs(aux->dat.dat_list[0].blk_cnt), ntohl(aux->dat.dat_list[0].blk_sz) ); |
| if (aux->frame_type==2) |
| printk(OSST_DEB_MSG "%s:D: mark_cnt=%d, last_mark_ppos=%d, last_mark_lbn=%d\n", name, |
| ntohl(aux->filemark_cnt), ntohl(aux->last_mark_ppos), ntohl(aux->last_mark_lbn)); |
| printk(OSST_DEB_MSG "%s:D: Exit read frame from OnStream tape with code %d\n", name, retval); |
| } |
| #endif |
| return (retval); |
| } |
| |
| static int osst_initiate_read(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| struct osst_request * SRpnt ; |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| int retval = 0; |
| char * name = tape_name(STp); |
| |
| if (STps->rw != ST_READING) { /* Initialize read operation */ |
| if (STps->rw == ST_WRITING || STp->dirty) { |
| STp->write_type = OS_WRITE_DATA; |
| osst_flush_write_buffer(STp, aSRpnt); |
| osst_flush_drive_buffer(STp, aSRpnt); |
| } |
| STps->rw = ST_READING; |
| STp->frame_in_buffer = 0; |
| |
| /* |
| * Issue a read 0 command to get the OnStream drive |
| * read frames into its buffer. |
| */ |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = READ_6; |
| cmd[1] = 1; |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Start Read Ahead on OnStream tape\n", name); |
| #endif |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| *aSRpnt = SRpnt; |
| if ((retval = STp->buffer->syscall_result)) |
| printk(KERN_WARNING "%s:W: Error starting read ahead\n", name); |
| } |
| |
| return retval; |
| } |
| |
| static int osst_get_logical_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| int frame_seq_number, int quiet) |
| { |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| char * name = tape_name(STp); |
| int cnt = 0, |
| bad = 0, |
| past = 0, |
| x, |
| position; |
| |
| /* |
| * If we want just any frame (-1) and there is a frame in the buffer, return it |
| */ |
| if (frame_seq_number == -1 && STp->frame_in_buffer) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Frame %d still in buffer\n", name, STp->frame_seq_number); |
| #endif |
| return (STps->eof); |
| } |
| /* |
| * Search and wait for the next logical tape frame |
| */ |
| while (1) { |
| if (cnt++ > 400) { |
| printk(KERN_ERR "%s:E: Couldn't find logical frame %d, aborting\n", |
| name, frame_seq_number); |
| if (STp->read_error_frame) { |
| osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Repositioning tape to bad frame %d\n", |
| name, STp->read_error_frame); |
| #endif |
| STp->read_error_frame = 0; |
| STp->abort_count++; |
| } |
| return (-EIO); |
| } |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Looking for frame %d, attempt %d\n", |
| name, frame_seq_number, cnt); |
| #endif |
| if ( osst_initiate_read(STp, aSRpnt) |
| || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) { |
| if (STp->raw) |
| return (-EIO); |
| position = osst_get_frame_position(STp, aSRpnt); |
| if (position >= 0xbae && position < 0xbb8) |
| position = 0xbb8; |
| else if (position > STp->eod_frame_ppos || ++bad == 10) { |
| position = STp->read_error_frame - 1; |
| bad = 0; |
| } |
| else { |
| position += 29; |
| cnt += 19; |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Bad frame detected, positioning tape to block %d\n", |
| name, position); |
| #endif |
| osst_set_frame_position(STp, aSRpnt, position, 0); |
| continue; |
| } |
| if (osst_verify_frame(STp, frame_seq_number, quiet)) |
| break; |
| if (osst_verify_frame(STp, -1, quiet)) { |
| x = ntohl(STp->buffer->aux->frame_seq_num); |
| if (STp->fast_open) { |
| printk(KERN_WARNING |
| "%s:W: Found logical frame %d instead of %d after fast open\n", |
| name, x, frame_seq_number); |
| STp->header_ok = 0; |
| STp->read_error_frame = 0; |
| return (-EIO); |
| } |
| if (x > frame_seq_number) { |
| if (++past > 3) { |
| /* positioning backwards did not bring us to the desired frame */ |
| position = STp->read_error_frame - 1; |
| } |
| else { |
| position = osst_get_frame_position(STp, aSRpnt) |
| + frame_seq_number - x - 1; |
| |
| if (STp->first_frame_position >= 3000 && position < 3000) |
| position -= 10; |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: Found logical frame %d while looking for %d: back up %d\n", |
| name, x, frame_seq_number, |
| 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 "%s:D: Skipping config partition\n", name); |
| #endif |
| osst_set_frame_position(STp, aSRpnt, 0xbb8, 0); |
| cnt--; |
| } |
| STp->frame_in_buffer = 0; |
| } |
| if (cnt > 1) { |
| STp->recover_count++; |
| STp->recover_erreg++; |
| printk(KERN_WARNING "%s:I: Don't worry, Read error at position %d recovered\n", |
| name, STp->read_error_frame); |
| } |
| STp->read_count++; |
| |
| #if DEBUG |
| if (debugging || STps->eof) |
| printk(OSST_DEB_MSG |
| "%s:D: Exit get logical frame (%d=>%d) from OnStream tape with code %d\n", |
| name, frame_seq_number, STp->frame_seq_number, STps->eof); |
| #endif |
| STp->fast_open = 0; |
| STp->read_error_frame = 0; |
| return (STps->eof); |
| } |
| |
| static int osst_seek_logical_blk(struct osst_tape * STp, struct osst_request ** aSRpnt, int logical_blk_num) |
| { |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| char * name = tape_name(STp); |
| int retries = 0; |
| int frame_seq_estimate, ppos_estimate, move; |
| |
| if (logical_blk_num < 0) logical_blk_num = 0; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Seeking logical block %d (now at %d, size %d%c)\n", |
| name, logical_blk_num, STp->logical_blk_num, |
| STp->block_size<1024?STp->block_size:STp->block_size/1024, |
| STp->block_size<1024?'b':'k'); |
| #endif |
| /* Do we know where we are? */ |
| if (STps->drv_block >= 0) { |
| move = logical_blk_num - STp->logical_blk_num; |
| if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1; |
| move /= (OS_DATA_SIZE / STp->block_size); |
| frame_seq_estimate = STp->frame_seq_number + move; |
| } else |
| frame_seq_estimate = logical_blk_num * STp->block_size / OS_DATA_SIZE; |
| |
| if (frame_seq_estimate < 2980) ppos_estimate = frame_seq_estimate + 10; |
| else ppos_estimate = frame_seq_estimate + 20; |
| while (++retries < 10) { |
| if (ppos_estimate > STp->eod_frame_ppos-2) { |
| frame_seq_estimate += STp->eod_frame_ppos - 2 - ppos_estimate; |
| ppos_estimate = STp->eod_frame_ppos - 2; |
| } |
| if (frame_seq_estimate < 0) { |
| frame_seq_estimate = 0; |
| ppos_estimate = 10; |
| } |
| osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0); |
| if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) { |
| /* we've located the estimated frame, now does it have our block? */ |
| if (logical_blk_num < STp->logical_blk_num || |
| logical_blk_num >= STp->logical_blk_num + ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt)) { |
| if (STps->eof == ST_FM_HIT) |
| move = logical_blk_num < STp->logical_blk_num? -2 : 1; |
| else { |
| move = logical_blk_num - STp->logical_blk_num; |
| if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1; |
| move /= (OS_DATA_SIZE / STp->block_size); |
| } |
| if (!move) move = logical_blk_num > STp->logical_blk_num ? 1 : -1; |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: Seek retry %d at ppos %d fsq %d (est %d) lbn %d (need %d) move %d\n", |
| name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate, |
| STp->logical_blk_num, logical_blk_num, move); |
| #endif |
| frame_seq_estimate += move; |
| ppos_estimate += move; |
| continue; |
| } else { |
| STp->buffer->read_pointer = (logical_blk_num - STp->logical_blk_num) * STp->block_size; |
| STp->buffer->buffer_bytes -= STp->buffer->read_pointer; |
| STp->logical_blk_num = logical_blk_num; |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: Seek success at ppos %d fsq %d in_buf %d, bytes %d, ptr %d*%d\n", |
| name, ppos_estimate, STp->frame_seq_number, STp->frame_in_buffer, |
| STp->buffer->buffer_bytes, STp->buffer->read_pointer / STp->block_size, |
| STp->block_size); |
| #endif |
| STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt); |
| if (STps->eof == ST_FM_HIT) { |
| STps->drv_file++; |
| STps->drv_block = 0; |
| } else { |
| STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)? |
| STp->logical_blk_num - |
| (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0): |
| -1; |
| } |
| STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF; |
| return 0; |
| } |
| } |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0) |
| goto error; |
| /* we are not yet at the estimated frame, adjust our estimate of its physical position */ |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Seek retry %d at ppos %d fsq %d (est %d) lbn %d (need %d)\n", |
| name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate, |
| STp->logical_blk_num, logical_blk_num); |
| #endif |
| if (frame_seq_estimate != STp->frame_seq_number) |
| ppos_estimate += frame_seq_estimate - STp->frame_seq_number; |
| else |
| break; |
| } |
| error: |
| printk(KERN_ERR "%s:E: Couldn't seek to logical block %d (at %d), %d retries\n", |
| name, logical_blk_num, STp->logical_blk_num, retries); |
| return (-EIO); |
| } |
| |
| /* The values below are based on the OnStream frame payload size of 32K == 2**15, |
| * that is, OSST_FRAME_SHIFT + OSST_SECTOR_SHIFT must be 15. With a minimum block |
| * size of 512 bytes, we need to be able to resolve 32K/512 == 64 == 2**6 positions |
| * inside each frame. Finally, OSST_SECTOR_MASK == 2**OSST_FRAME_SHIFT - 1. |
| */ |
| #define OSST_FRAME_SHIFT 6 |
| #define OSST_SECTOR_SHIFT 9 |
| #define OSST_SECTOR_MASK 0x03F |
| |
| static int osst_get_sector(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| int sector; |
| #if DEBUG |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG |
| "%s:D: Positioned at ppos %d, frame %d, lbn %d, file %d, blk %d, %cptr %d, eof %d\n", |
| name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num, |
| STp->ps[STp->partition].drv_file, STp->ps[STp->partition].drv_block, |
| STp->ps[STp->partition].rw == ST_WRITING?'w':'r', |
| STp->ps[STp->partition].rw == ST_WRITING?STp->buffer->buffer_bytes: |
| STp->buffer->read_pointer, STp->ps[STp->partition].eof); |
| #endif |
| /* do we know where we are inside a file? */ |
| if (STp->ps[STp->partition].drv_block >= 0) { |
| sector = (STp->frame_in_buffer ? STp->first_frame_position-1 : |
| STp->first_frame_position) << OSST_FRAME_SHIFT; |
| if (STp->ps[STp->partition].rw == ST_WRITING) |
| sector |= (STp->buffer->buffer_bytes >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK; |
| else |
| sector |= (STp->buffer->read_pointer >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK; |
| } else { |
| sector = osst_get_frame_position(STp, aSRpnt); |
| if (sector > 0) |
| sector <<= OSST_FRAME_SHIFT; |
| } |
| return sector; |
| } |
| |
| static int osst_seek_sector(struct osst_tape * STp, struct osst_request ** aSRpnt, int sector) |
| { |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| int frame = sector >> OSST_FRAME_SHIFT, |
| offset = (sector & OSST_SECTOR_MASK) << OSST_SECTOR_SHIFT, |
| r; |
| #if DEBUG |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG "%s:D: Seeking sector %d in frame %d at offset %d\n", |
| name, sector, frame, offset); |
| #endif |
| if (frame < 0 || frame >= STp->capacity) return (-ENXIO); |
| |
| if (frame <= STp->first_data_ppos) { |
| STp->frame_seq_number = 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, offset?frame:frame-1, 0); |
| if (r < 0) return r; |
| |
| r = osst_get_logical_frame(STp, aSRpnt, -1, 1); |
| if (r < 0) return r; |
| |
| if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO); |
| |
| if (offset) { |
| STp->logical_blk_num += offset / STp->block_size; |
| STp->buffer->read_pointer = offset; |
| STp->buffer->buffer_bytes -= offset; |
| } else { |
| STp->frame_seq_number++; |
| STp->frame_in_buffer = 0; |
| STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0; |
| } |
| STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt); |
| if (STps->eof == ST_FM_HIT) { |
| STps->drv_file++; |
| STps->drv_block = 0; |
| } else { |
| STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)? |
| STp->logical_blk_num - |
| (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0): |
| -1; |
| } |
| STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF; |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: Now positioned at ppos %d, frame %d, lbn %d, file %d, blk %d, rptr %d, eof %d\n", |
| name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num, |
| STps->drv_file, STps->drv_block, STp->buffer->read_pointer, STps->eof); |
| #endif |
| return 0; |
| } |
| |
| /* |
| * Read back the drive's internal buffer contents, as a part |
| * of the write error recovery mechanism for old OnStream |
| * firmware revisions. |
| * Precondition for this function to work: all frames in the |
| * drive's buffer must be of one type (DATA, MARK or EOD)! |
| */ |
| static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| unsigned int frame, unsigned int skip, int pending) |
| { |
| struct osst_request * SRpnt = * aSRpnt; |
| unsigned char * buffer, * p; |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| int flag, new_frame, i; |
| int nframes = STp->cur_frames; |
| int blks_per_frame = ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| int frame_seq_number = ntohl(STp->buffer->aux->frame_seq_num) |
| - (nframes + pending - 1); |
| int logical_blk_num = ntohl(STp->buffer->aux->logical_blk_num) |
| - (nframes + pending - 1) * blks_per_frame; |
| char * name = tape_name(STp); |
| unsigned long startwait = jiffies; |
| #if DEBUG |
| int dbg = debugging; |
| #endif |
| |
| if ((buffer = vmalloc((nframes + 1) * OS_DATA_SIZE)) == NULL) |
| return (-EIO); |
| |
| printk(KERN_INFO "%s:I: Reading back %d frames from drive buffer%s\n", |
| name, nframes, pending?" and one that was pending":""); |
| |
| osst_copy_from_buffer(STp->buffer, (p = &buffer[nframes * OS_DATA_SIZE])); |
| #if DEBUG |
| if (pending && debugging) |
| printk(OSST_DEB_MSG "%s:D: Pending frame %d (lblk %d), data %02x %02x %02x %02x\n", |
| name, frame_seq_number + nframes, |
| logical_blk_num + nframes * blks_per_frame, |
| p[0], p[1], p[2], p[3]); |
| #endif |
| for (i = 0, p = buffer; i < nframes; 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, DMA_FROM_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| |
| if ((STp->buffer)->syscall_result || !SRpnt) { |
| printk(KERN_ERR "%s:E: Failed to read frame back from OnStream buffer\n", name); |
| vfree(buffer); |
| *aSRpnt = SRpnt; |
| return (-EIO); |
| } |
| osst_copy_from_buffer(STp->buffer, p); |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Read back logical frame %d, data %02x %02x %02x %02x\n", |
| name, frame_seq_number + i, p[0], p[1], p[2], p[3]); |
| #endif |
| } |
| *aSRpnt = SRpnt; |
| osst_get_frame_position(STp, aSRpnt); |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Frames left in buffer: %d\n", name, 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 frames that fail, just the ones after them */ |
| |
| for (flag=1, new_frame=frame, p=buffer, i=0; i < nframes + pending; ) { |
| |
| if (flag) { |
| if (STp->write_type == OS_WRITE_HEADER) { |
| i += skip; |
| p += skip * OS_DATA_SIZE; |
| } |
| else if (new_frame < 2990 && new_frame+skip+nframes+pending >= 2990) |
| new_frame = 3000-i; |
| else |
| new_frame += skip; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Position to frame %d, write fseq %d\n", |
| name, new_frame+i, frame_seq_number+i); |
| #endif |
| osst_set_frame_position(STp, aSRpnt, new_frame + i, 0); |
| osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE); |
| osst_get_frame_position(STp, aSRpnt); |
| SRpnt = * aSRpnt; |
| |
| if (new_frame > frame + 1000) { |
| printk(KERN_ERR "%s:E: Failed to find writable tape media\n", name); |
| vfree(buffer); |
| return (-EIO); |
| } |
| if ( i >= nframes + pending ) break; |
| flag = 0; |
| } |
| osst_copy_to_buffer(STp->buffer, p); |
| /* |
| * IMPORTANT: for error recovery to work, _never_ queue frames with mixed frame type! |
| */ |
| osst_init_aux(STp, STp->buffer->aux->frame_type, frame_seq_number+i, |
| logical_blk_num + i*blks_per_frame, |
| ntohl(STp->buffer->aux->dat.dat_list[0].blk_sz), blks_per_frame); |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = WRITE_6; |
| cmd[1] = 1; |
| cmd[4] = 1; |
| |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG |
| "%s:D: About to write frame %d, seq %d, lbn %d, data %02x %02x %02x %02x\n", |
| name, new_frame+i, frame_seq_number+i, logical_blk_num + i*blks_per_frame, |
| p[0], p[1], p[2], p[3]); |
| #endif |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| |
| 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 == nframes + pending ) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Check re-write successful\n", name); |
| #endif |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = WRITE_FILEMARKS; |
| cmd[1] = 1; |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, |
| STp->timeout, MAX_RETRIES, 1); |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG "%s:D: Sleeping in re-write wait ready\n", name); |
| printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| 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, DMA_NONE, STp->timeout, |
| MAX_RETRIES, 1); |
| |
| if (SRpnt->sense[2] == 2 && SRpnt->sense[12] == 4 && |
| (SRpnt->sense[13] == 1 || SRpnt->sense[13] == 8)) { |
| /* in the process of becoming ready */ |
| msleep(100); |
| continue; |
| } |
| if (STp->buffer->syscall_result) |
| flag = 1; |
| break; |
| } |
| #if DEBUG |
| debugging = dbg; |
| printk(OSST_DEB_MSG "%s:D: Wait re-write finished\n", name); |
| #endif |
| } |
| } |
| *aSRpnt = SRpnt; |
| if (flag) { |
| if ((SRpnt->sense[ 2] & 0x0f) == 13 && |
| SRpnt->sense[12] == 0 && |
| SRpnt->sense[13] == 2) { |
| printk(KERN_ERR "%s:E: Volume overflow in write error recovery\n", name); |
| vfree(buffer); |
| return (-EIO); /* hit end of tape = fail */ |
| } |
| i = ((SRpnt->sense[3] << 24) | |
| (SRpnt->sense[4] << 16) | |
| (SRpnt->sense[5] << 8) | |
| SRpnt->sense[6] ) - new_frame; |
| p = &buffer[i * OS_DATA_SIZE]; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Additional write error at %d\n", name, new_frame+i); |
| #endif |
| osst_get_frame_position(STp, aSRpnt); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: reported frame positions: host = %d, tape = %d, buffer = %d\n", |
| name, STp->first_frame_position, STp->last_frame_position, STp->cur_frames); |
| #endif |
| } |
| } |
| if (flag) { |
| /* error recovery did not successfully complete */ |
| printk(KERN_ERR "%s:D: Write error recovery failed in %s\n", name, |
| STp->write_type == OS_WRITE_HEADER?"header":"body"); |
| } |
| if (!pending) |
| osst_copy_to_buffer(STp->buffer, p); /* so buffer content == at entry in all cases */ |
| vfree(buffer); |
| return 0; |
| } |
| |
| static int osst_reposition_and_retry(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| unsigned int frame, unsigned int skip, int pending) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| char * name = tape_name(STp); |
| int expected = 0; |
| int attempts = 1000 / skip; |
| int flag = 1; |
| unsigned 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 (frame < 2990 && frame+skip+STp->cur_frames+pending >= 2990) |
| frame = 3000-skip; |
| expected = frame+skip+STp->cur_frames+pending; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Position to fppos %d, re-write from fseq %d\n", |
| name, frame+skip, STp->frame_seq_number-STp->cur_frames-pending); |
| #endif |
| osst_set_frame_position(STp, aSRpnt, frame + skip, 1); |
| flag = 0; |
| attempts--; |
| schedule_timeout_interruptible(msecs_to_jiffies(100)); |
| } |
| if (osst_get_frame_position(STp, aSRpnt) < 0) { /* additional write error */ |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Addl error, host %d, tape %d, buffer %d\n", |
| name, STp->first_frame_position, |
| STp->last_frame_position, STp->cur_frames); |
| #endif |
| frame = 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 "%s:D: About to write pending fseq %d at fppos %d\n", |
| name, STp->frame_seq_number-1, STp->first_frame_position); |
| #endif |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| *aSRpnt = SRpnt; |
| |
| if (STp->buffer->syscall_result) { /* additional write error */ |
| if ((SRpnt->sense[ 2] & 0x0f) == 13 && |
| SRpnt->sense[12] == 0 && |
| SRpnt->sense[13] == 2) { |
| printk(KERN_ERR |
| "%s:E: Volume overflow in write error recovery\n", |
| name); |
| 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 "%s:D: Wait re-write finished\n", name); |
| #endif |
| if (STp->first_frame_position != expected) { |
| printk(KERN_ERR "%s:A: Actual position %d - expected %d\n", |
| name, STp->first_frame_position, expected); |
| return (-EIO); |
| } |
| return 0; |
| } |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG "%s:D: Sleeping in re-write wait ready\n", name); |
| printk(OSST_DEB_MSG "%s:D: Turning off debugging for a while\n", name); |
| debugging = 0; |
| } |
| #endif |
| schedule_timeout_interruptible(msecs_to_jiffies(100)); |
| } |
| printk(KERN_ERR "%s:E: Failed to find valid tape media\n", name); |
| #if DEBUG |
| debugging = dbg; |
| #endif |
| return (-EIO); |
| } |
| |
| /* |
| * Error recovery algorithm for the OnStream tape. |
| */ |
| |
| static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending) |
| { |
| struct osst_request * SRpnt = * aSRpnt; |
| struct st_partstat * STps = & STp->ps[STp->partition]; |
| char * name = tape_name(STp); |
| int retval = 0; |
| int rw_state; |
| unsigned int frame, skip; |
| |
| rw_state = STps->rw; |
| |
| if ((SRpnt->sense[ 2] & 0x0f) != 3 |
| || SRpnt->sense[12] != 12 |
| || SRpnt->sense[13] != 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Write error recovery cannot handle %02x:%02x:%02x\n", name, |
| SRpnt->sense[2], SRpnt->sense[12], SRpnt->sense[13]); |
| #endif |
| return (-EIO); |
| } |
| frame = (SRpnt->sense[3] << 24) | |
| (SRpnt->sense[4] << 16) | |
| (SRpnt->sense[5] << 8) | |
| SRpnt->sense[6]; |
| skip = SRpnt->sense[9]; |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Detected physical bad frame at %u, advised to skip %d\n", name, frame, skip); |
| #endif |
| osst_get_frame_position(STp, aSRpnt); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: reported frame positions: host = %d, tape = %d\n", |
| name, 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 |
| "%s:I: Relocating %d buffered logical frames from position %u to %u\n", |
| name, STp->cur_frames, frame, (frame + skip > 3000 && frame < 3000)?3000:frame + skip); |
| if (STp->os_fw_rev >= 10600) |
| retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending); |
| else |
| retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending); |
| printk(KERN_WARNING "%s:%s: %sWrite error%srecovered\n", name, |
| retval?"E" :"I", |
| retval?"" :"Don't worry, ", |
| retval?" not ":" "); |
| break; |
| case OS_WRITE_LAST_MARK: |
| printk(KERN_ERR "%s:E: Bad frame in update last marker, fatal\n", name); |
| osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0); |
| retval = -EIO; |
| break; |
| case OS_WRITE_HEADER: |
| printk(KERN_WARNING "%s:I: Bad frame in header partition, skipped\n", name); |
| retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending); |
| break; |
| default: |
| printk(KERN_INFO "%s:I: Bad frame in filler, ignored\n", name); |
| osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0); |
| } |
| osst_get_frame_position(STp, aSRpnt); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Positioning complete, cur_frames %d, pos %d, tape pos %d\n", |
| name, STp->cur_frames, STp->first_frame_position, STp->last_frame_position); |
| printk(OSST_DEB_MSG "%s:D: next logical frame to write: %d\n", name, STp->logical_blk_num); |
| #endif |
| if (retval == 0) { |
| STp->recover_count++; |
| STp->recover_erreg++; |
| } else |
| STp->abort_count++; |
| |
| STps->rw = rw_state; |
| return retval; |
| } |
| |
| static int osst_space_over_filemarks_backward(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| int mt_op, int mt_count) |
| { |
| char * name = tape_name(STp); |
| int cnt; |
| int last_mark_ppos = -1; |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_backwards %d %d\n", name, mt_op, mt_count); |
| #endif |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_bwd\n", name); |
| #endif |
| 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 DEBUG |
| if (STp->header_cache == NULL || (cnt - mt_count) < 0 || (cnt - mt_count) >= OS_FM_TAB_MAX) |
| printk(OSST_DEB_MSG "%s:D: Filemark lookup fail due to %s\n", name, |
| STp->header_cache == NULL?"lack of header cache":"count out of range"); |
| else |
| printk(OSST_DEB_MSG "%s:D: Filemark lookup: prev mark %d (%s), skip %d to %d\n", |
| name, 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_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos); |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: Couldn't get logical blk num in space_filemarks\n", name); |
| #endif |
| return (-EIO); |
| } |
| if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| name, last_mark_ppos); |
| return (-EIO); |
| } |
| goto found; |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reverting to scan filemark backwards\n", name); |
| #endif |
| } |
| 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 "%s:D: Positioning to last mark at %d\n", name, last_mark_ppos); |
| #endif |
| osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos); |
| cnt++; |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", name); |
| #endif |
| return (-EIO); |
| } |
| if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| name, last_mark_ppos); |
| return (-EIO); |
| } |
| } |
| found: |
| if (mt_op == MTBSFM) { |
| STp->frame_seq_number++; |
| STp->frame_in_buffer = 0; |
| STp->buffer->buffer_bytes = 0; |
| STp->buffer->read_pointer = 0; |
| STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| } |
| 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(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| int mt_op, int mt_count) |
| { |
| int cnt = 0; |
| #if DEBUG |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_forward_slow %d %d\n", name, mt_op, mt_count); |
| #endif |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_fwd\n", name); |
| #endif |
| return (-EIO); |
| } |
| while (1) { |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", name); |
| #endif |
| 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 "%s:D: space_fwd: EOD reached\n", name); |
| #endif |
| if (STp->first_frame_position > STp->eod_frame_ppos+1) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: EOD position corrected (%d=>%d)\n", |
| name, 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->frame_in_buffer = 0; |
| } |
| if (mt_op == MTFSF) { |
| STp->frame_seq_number++; |
| STp->frame_in_buffer = 0; |
| STp->buffer->buffer_bytes = 0; |
| STp->buffer->read_pointer = 0; |
| STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| } |
| return 0; |
| } |
| |
| /* |
| * Fast linux specific version of OnStream FSF |
| */ |
| static int osst_space_over_filemarks_forward_fast(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| int mt_op, int mt_count) |
| { |
| char * name = tape_name(STp); |
| int cnt = 0, |
| next_mark_ppos = -1; |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reached space_over_filemarks_forward_fast %d %d\n", name, mt_op, mt_count); |
| #endif |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks_fwd\n", name); |
| #endif |
| 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 DEBUG |
| if (STp->header_cache == NULL || (cnt + mt_count) >= OS_FM_TAB_MAX) |
| printk(OSST_DEB_MSG "%s:D: Filemark lookup fail due to %s\n", name, |
| STp->header_cache == NULL?"lack of header cache":"count out of range"); |
| else |
| printk(OSST_DEB_MSG "%s:D: Filemark lookup: prev mark %d (%s), skip %d to %d\n", |
| name, 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) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); |
| #endif |
| return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); |
| } else { |
| osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos); |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", |
| name); |
| #endif |
| return (-EIO); |
| } |
| if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| name, next_mark_ppos); |
| return (-EIO); |
| } |
| if (ntohl(STp->buffer->aux->filemark_cnt) != cnt + mt_count) { |
| printk(KERN_WARNING "%s:W: Expected to find marker %d at ppos %d, not %d\n", |
| name, 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 "%s:D: space_fwd: EOD reached\n", name); |
| #endif |
| return (-EIO); |
| } |
| if (ntohl(STp->buffer->aux->filemark_cnt) == 0) { |
| if (STp->first_mark_ppos == -1) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); |
| #endif |
| return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count); |
| } |
| osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos); |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: Couldn't get logical blk num in space_filemarks_fwd_fast\n", |
| name); |
| #endif |
| return (-EIO); |
| } |
| if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| printk(KERN_WARNING "%s:W: Expected to find filemark at %d\n", |
| name, 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) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reverting to slow filemark space\n", name); |
| #endif |
| return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt); |
| } |
| #if DEBUG |
| else printk(OSST_DEB_MSG "%s:D: Positioning to next mark at %d\n", name, next_mark_ppos); |
| #endif |
| osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos); |
| cnt++; |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in space_filemarks\n", |
| name); |
| #endif |
| return (-EIO); |
| } |
| if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) { |
| printk(KERN_WARNING "%s:W: Expected to find marker at ppos %d, not found\n", |
| name, next_mark_ppos); |
| return (-EIO); |
| } |
| } |
| } |
| if (mt_op == MTFSF) { |
| STp->frame_seq_number++; |
| STp->frame_in_buffer = 0; |
| STp->buffer->buffer_bytes = 0; |
| STp->buffer->read_pointer = 0; |
| STp->logical_blk_num += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt); |
| } |
| 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(struct osst_tape * STp, struct osst_request ** aSRpnt, int retries) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt = * aSRpnt; |
| char * name = tape_name(STp); |
| |
| 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 "%s:D: Setting number of retries on OnStream tape to %d\n", name, retries); |
| |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| *aSRpnt = SRpnt; |
| |
| if ((STp->buffer)->syscall_result) |
| printk (KERN_ERR "%s:D: Couldn't set retries to %d\n", name, retries); |
| } |
| #endif |
| |
| |
| static int osst_write_filemark(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| int result; |
| int this_mark_ppos = STp->first_frame_position; |
| int this_mark_lbn = STp->logical_blk_num; |
| #if DEBUG |
| char * name = tape_name(STp); |
| #endif |
| |
| if (STp->raw) return 0; |
| |
| STp->write_type = OS_WRITE_NEW_MARK; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Writing Filemark %i at fppos %d (fseq %d, lblk %d)\n", |
| name, STp->filemark_cnt, this_mark_ppos, STp->frame_seq_number, this_mark_lbn); |
| #endif |
| STp->dirty = 1; |
| result = osst_flush_write_buffer(STp, aSRpnt); |
| result |= osst_flush_drive_buffer(STp, aSRpnt); |
| STp->last_mark_ppos = this_mark_ppos; |
| STp->last_mark_lbn = this_mark_lbn; |
| 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; |
| return result; |
| } |
| |
| static int osst_write_eod(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| int result; |
| #if DEBUG |
| char * name = tape_name(STp); |
| #endif |
| |
| if (STp->raw) return 0; |
| |
| STp->write_type = OS_WRITE_EOD; |
| STp->eod_frame_ppos = STp->first_frame_position; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Writing EOD at fppos %d (fseq %d, lblk %d)\n", name, |
| STp->eod_frame_ppos, STp->frame_seq_number, STp->logical_blk_num); |
| #endif |
| STp->dirty = 1; |
| |
| result = osst_flush_write_buffer(STp, aSRpnt); |
| result |= osst_flush_drive_buffer(STp, aSRpnt); |
| STp->eod_frame_lfa = --(STp->frame_seq_number); |
| return result; |
| } |
| |
| static int osst_write_filler(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int count) |
| { |
| char * name = tape_name(STp); |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reached onstream write filler group %d\n", name, where); |
| #endif |
| osst_wait_ready(STp, aSRpnt, 60 * 5, 0); |
| osst_set_frame_position(STp, aSRpnt, where, 0); |
| STp->write_type = OS_WRITE_FILLER; |
| while (count--) { |
| memcpy(STp->buffer->b_data, "Filler", 6); |
| STp->buffer->buffer_bytes = 6; |
| STp->dirty = 1; |
| if (osst_flush_write_buffer(STp, aSRpnt)) { |
| printk(KERN_INFO "%s:I: Couldn't write filler frame\n", name); |
| return (-EIO); |
| } |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Exiting onstream write filler group\n", name); |
| #endif |
| return osst_flush_drive_buffer(STp, aSRpnt); |
| } |
| |
| static int __osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int count) |
| { |
| char * name = tape_name(STp); |
| int result; |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reached onstream write header group %d\n", name, where); |
| #endif |
| osst_wait_ready(STp, aSRpnt, 60 * 5, 0); |
| osst_set_frame_position(STp, aSRpnt, where, 0); |
| STp->write_type = OS_WRITE_HEADER; |
| 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)) { |
| printk(KERN_INFO "%s:I: Couldn't write header frame\n", name); |
| return (-EIO); |
| } |
| } |
| result = osst_flush_drive_buffer(STp, aSRpnt); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Write onstream header group %s\n", name, result?"failed":"done"); |
| #endif |
| return result; |
| } |
| |
| static int osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int locate_eod) |
| { |
| os_header_t * header; |
| int result; |
| char * name = tape_name(STp); |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Writing tape header\n", name); |
| #endif |
| if (STp->raw) return 0; |
| |
| if (STp->header_cache == NULL) { |
| if ((STp->header_cache = vmalloc(sizeof(os_header_t))) == NULL) { |
| printk(KERN_ERR "%s:E: Failed to allocate header cache\n", name); |
| return (-ENOMEM); |
| } |
| memset(STp->header_cache, 0, sizeof(os_header_t)); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Allocated and cleared memory for header cache\n", name); |
| #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_cnt<OS_FM_TAB_MAX? |
| STp->filemark_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 "%s:D: Locating back to eod frame addr %d\n", name, STp->eod_frame_ppos); |
| #endif |
| osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0); |
| } |
| if (result) |
| printk(KERN_ERR "%s:E: Write header failed\n", name); |
| 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(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| if (STp->header_cache != NULL) |
| memset(STp->header_cache, 0, sizeof(os_header_t)); |
| |
| STp->logical_blk_num = STp->frame_seq_number = 0; |
| STp->frame_in_buffer = 0; |
| STp->eod_frame_ppos = STp->first_data_ppos = 0x0000000A; |
| STp->filemark_cnt = 0; |
| STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1; |
| return osst_write_header(STp, aSRpnt, 1); |
| } |
| |
| static int __osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt, int ppos) |
| { |
| char * name = tape_name(STp); |
| 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 (ppos == 5 || ppos == 0xbae || STp->buffer->syscall_result) { |
| if (osst_set_frame_position(STp, aSRpnt, ppos, 0)) |
| printk(KERN_WARNING "%s:W: Couldn't position tape\n", name); |
| osst_wait_ready(STp, aSRpnt, 60 * 15, 0); |
| if (osst_initiate_read (STp, aSRpnt)) { |
| printk(KERN_WARNING "%s:W: Couldn't initiate read\n", name); |
| return 0; |
| } |
| } |
| if (osst_read_frame(STp, aSRpnt, 180)) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't read header frame\n", name); |
| #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 "%s:D: Skipping non-header frame (%d)\n", name, ppos); |
| #endif |
| return 0; |
| } |
| if (ntohl(aux->frame_seq_num) != 0 || |
| ntohl(aux->logical_blk_num) != 0 || |
| aux->partition.partition_num != OS_CONFIG_PARTITION || |
| ntohl(aux->partition.first_frame_ppos) != 0 || |
| ntohl(aux->partition.last_frame_ppos) != 0xbb7 ) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Invalid header frame (%d,%d,%d,%d,%d)\n", name, |
| ntohl(aux->frame_seq_num), ntohl(aux->logical_blk_num), |
| aux->partition.partition_num, ntohl(aux->partition.first_frame_ppos), |
| ntohl(aux->partition.last_frame_ppos)); |
| #endif |
| return 0; |
| } |
| if (strncmp(header->ident_str, "ADR_SEQ", 7) != 0 && |
| strncmp(header->ident_str, "ADR-SEQ", 7) != 0) { |
| strlcpy(id_string, header->ident_str, 8); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Invalid header identification string %s\n", name, id_string); |
| #endif |
| return 0; |
| } |
| update_frame_cntr = ntohl(aux->update_frame_cntr); |
| if (update_frame_cntr < STp->update_frame_cntr) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame %d with update_frame_counter %d<%d\n", |
| name, ppos, update_frame_cntr, STp->update_frame_cntr); |
| #endif |
| return 0; |
| } |
| if (header->major_rev != 1 || header->minor_rev != 4 ) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: %s revision %d.%d detected (1.4 supported)\n", |
| name, (header->major_rev != 1 || header->minor_rev < 2 || |
| header->minor_rev > 4 )? "Invalid" : "Warning:", |
| header->major_rev, header->minor_rev); |
| #endif |
| if (header->major_rev != 1 || header->minor_rev < 2 || header->minor_rev > 4) |
| return 0; |
| } |
| #if DEBUG |
| if (header->pt_par_num != 1) |
| printk(KERN_INFO "%s:W: %d partitions defined, only one supported\n", |
| name, header->pt_par_num); |
| #endif |
| 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 "%s:I: Linux media version %d detected (current 4)\n", |
| name, linux_media_version); |
| } else { |
| printk(KERN_WARNING "%s:W: Non Linux media detected (%s)\n", name, id_string); |
| return 0; |
| } |
| if (linux_media_version < STp->linux_media_version) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping frame %d with linux_media_version %d\n", |
| name, ppos, linux_media_version); |
| #endif |
| return 0; |
| } |
| if (linux_media_version > STp->linux_media_version) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Frame %d sets linux_media_version to %d\n", |
| name, ppos, 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 "%s:D: Frame %d sets update_frame_counter to %d\n", |
| name, ppos, update_frame_cntr); |
| #endif |
| if (STp->header_cache == NULL) { |
| if ((STp->header_cache = vmalloc(sizeof(os_header_t))) == NULL) { |
| printk(KERN_ERR "%s:E: Failed to allocate header cache\n", name); |
| return 0; |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Allocated memory for header cache\n", name); |
| #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->last_mark_lbn = ntohl(aux->last_mark_lbn); |
| STp->update_frame_cntr = update_frame_cntr; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Detected write pass %d, update frame counter %d, filemark counter %d\n", |
| name, STp->wrt_pass_cntr, STp->update_frame_cntr, STp->filemark_cnt); |
| printk(OSST_DEB_MSG "%s:D: first data frame on tape = %d, last = %d, eod frame = %d\n", name, |
| STp->first_data_ppos, |
| ntohl(header->partition[0].last_frame_ppos), |
| ntohl(header->partition[0].eod_frame_ppos)); |
| printk(OSST_DEB_MSG "%s:D: first mark on tape = %d, last = %d, eod frame = %d\n", |
| name, STp->first_mark_ppos, STp->last_mark_ppos, STp->eod_frame_ppos); |
| #endif |
| if (header->minor_rev < 4 && STp->linux_media_version == 4) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Moving filemark list to ADR 1.4 location\n", name); |
| #endif |
| 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_cnt<OS_FM_TAB_MAX?STp->filemark_cnt:OS_FM_TAB_MAX))) |
| printk(KERN_WARNING "%s:W: Failed consistency check ADR 1.4 format\n", name); |
| |
| } |
| |
| return 1; |
| } |
| |
| static int osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| int position, ppos; |
| int first, last; |
| int valid = 0; |
| char * name = tape_name(STp); |
| |
| 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 = STp->last_mark_lbn = -1; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reading header\n", name); |
| #endif |
| |
| /* optimization for speed - if we are positioned at ppos 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 (ppos = first; ppos < last; ppos++) |
| if (__osst_analyze_headers(STp, aSRpnt, ppos)) |
| valid = 1; |
| |
| first = position==10? 5:0xbae; |
| last = position==10?10:0xbb3; |
| |
| for (ppos = first; ppos < last; ppos++) |
| if (__osst_analyze_headers(STp, aSRpnt, ppos)) |
| valid = 1; |
| |
| if (!valid) { |
| printk(KERN_ERR "%s:E: Failed to find valid ADRL header, new media?\n", name); |
| 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->frame_seq_number = STp->logical_blk_num = 0; |
| } |
| osst_set_frame_position(STp, aSRpnt, position, 0); |
| STp->header_ok = 1; |
| |
| return 1; |
| } |
| |
| static int osst_verify_position(struct osst_tape * STp, struct osst_request ** aSRpnt) |
| { |
| int frame_position = STp->first_frame_position; |
| int frame_seq_numbr = STp->frame_seq_number; |
| int logical_blk_num = STp->logical_blk_num; |
| int halfway_frame = STp->frame_in_buffer; |
| int read_pointer = STp->buffer->read_pointer; |
| int prev_mark_ppos = -1; |
| int actual_mark_ppos, i, n; |
| #if DEBUG |
| char * name = tape_name(STp); |
| |
| printk(OSST_DEB_MSG "%s:D: Verify that the tape is really the one we think before writing\n", name); |
| #endif |
| osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); |
| if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't get logical blk num in verify_position\n", name); |
| #endif |
| return (-EIO); |
| } |
| if (STp->linux_media_version >= 4) { |
| for (i=0; i<STp->filemark_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 || |
| frame_seq_numbr != STp
|