| /* |
| 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.h> |
| #include <linux/proc_fs.h> |
| #include <linux/mm.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 <asm/uaccess.h> |
| #include <asm/dma.h> |
| #include <asm/system.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 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_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 = { |
| .owner = THIS_MODULE, |
| .gendrv = { |
| .name = "osst", |
| .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("osst ", 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("osst ", SRpnt->sense, SCSI_SENSE_BUFFERSIZE); |
| } |
| else { |
| static int notyetprinted = 1; |
| |
| printk(KERN_WARNING |
| "%s:W: Warning %x (sugg. bt 0x%x, driver bt 0x%x, host bt 0x%x).\n", |
| name, result, suggestion(result), driver_byte(result) & DRIVER_MASK, |
| 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_sleep_done(void *data, char *sense, int result, int resid) |
| { |
| struct osst_request *SRpnt = data; |
| struct osst_tape *STp = SRpnt->stp; |
| |
| memcpy(SRpnt->sense, sense, SCSI_SENSE_BUFFERSIZE); |
| STp->buffer->cmdstat.midlevel_result = SRpnt->result = result; |
| #if DEBUG |
| STp->write_pending = 0; |
| #endif |
| if (SRpnt->waiting) |
| complete(SRpnt->waiting); |
| } |
| |
| /* 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); |
| } |
| |
| /* 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 (scsi_execute_async(STp->device, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, |
| use_sg, timeout, retries, SRpnt, osst_sleep_done, GFP_KERNEL)) |
| /* 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]); |
| 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(STp->buffer->sg[i].page), |
| 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. Finaly, 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 = (unsigned char *)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 = (os_header_t *)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 = (os_header_t *)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->frame_seq_number + (halfway_frame?0:1) || |
| prev_mark_ppos != actual_mark_ppos ) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Block mismatch: fppos %d-%d, fseq %d-%d, mark %d-%d\n", name, |
| STp->first_frame_position, frame_position, |
| STp->frame_seq_number + (halfway_frame?0:1), |
| frame_seq_numbr, actual_mark_ppos, prev_mark_ppos); |
| #endif |
| return (-EIO); |
| } |
| if (halfway_frame) { |
| /* prepare buffer for append and rewrite on top of original */ |
| osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0); |
| STp->buffer->buffer_bytes = read_pointer; |
| STp->ps[STp->partition].rw = ST_WRITING; |
| STp->dirty = 1; |
| } |
| STp->frame_in_buffer = halfway_frame; |
| STp->frame_seq_number = frame_seq_numbr; |
| 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 < 106B < ... < 106a < ... < 1.06 |
| * This fn makes monoton numbers out of this scheme ... |
| */ |
| static unsigned int osst_parse_firmware_rev (const char * str) |
| { |
| if (str[1] == '.') { |
| return (str[0]-'0')*10000 |
| +(str[2]-'0')*1000 |
| +(str[3]-'0')*100; |
| } else { |
| return (str[0]-'0')*10000 |
| +(str[1]-'0')*1000 |
| +(str[2]-'0')*100 - 100 |
| +(str[3]-'@'); |
| } |
| } |
| |
| /* |
| * Configure the OnStream SCII tape drive for default operation |
| */ |
| static int osst_configure_onstream(struct osst_tape *STp, struct osst_request ** aSRpnt) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| char * name = tape_name(STp); |
| struct osst_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 "%s:D: Not Ready\n", name); |
| #endif |
| return (-EIO); |
| } |
| |
| if (STp->os_fw_rev < 10600) { |
| printk(KERN_INFO "%s:I: Old OnStream firmware revision detected (%s),\n", name, STp->device->rev); |
| printk(KERN_INFO "%s:I: an upgrade to version 1.06 or above is recommended\n", name); |
| } |
| |
| /* |
| * Configure 32.5KB (data+aux) frame size. |
| * Get the current frame 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], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| if (SRpnt == NULL) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "osst :D: Busy\n"); |
| #endif |
| return (-EBUSY); |
| } |
| *aSRpnt = SRpnt; |
| if ((STp->buffer)->syscall_result != 0) { |
| printk (KERN_ERR "%s:E: Can't get tape block size mode page\n", name); |
| 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(OSST_DEB_MSG "%s:D: 32KB play back: %s\n", name, bs->play32 ? "Yes" : "No"); |
| printk(OSST_DEB_MSG "%s:D: 32.5KB play back: %s\n", name, bs->play32_5 ? "Yes" : "No"); |
| printk(OSST_DEB_MSG "%s:D: 32KB record: %s\n", name, bs->record32 ? "Yes" : "No"); |
| printk(OSST_DEB_MSG "%s:D: 32.5KB record: %s\n", name, 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], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| *aSRpnt = SRpnt; |
| if ((STp->buffer)->syscall_result != 0) { |
| printk (KERN_ERR "%s:E: Couldn't set tape block size mode page\n", name); |
| return (-EIO); |
| } |
| |
| #if DEBUG |
| printk(KERN_INFO "%s:D: Drive Block Size changed to 32.5K\n", name); |
| /* |
| * 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], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| *aSRpnt = SRpnt; |
| |
| if ((STp->buffer)->syscall_result != 0) { |
| printk (KERN_ERR "%s:E: Couldn't set vendor name to %s\n", name, |
| (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], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| *aSRpnt = SRpnt; |
| |
| if ((STp->buffer)->syscall_result != 0) { |
| printk (KERN_ERR "%s:E: Can't get capabilities page\n", name); |
| 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], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| *aSRpnt = SRpnt; |
| |
| if ((STp->buffer)->syscall_result != 0) { |
| printk (KERN_ERR "%s:E: Can't get tape parameter page\n", name); |
| 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 "%s:D: Density %d, tape length: %dMB, drive buffer size: %dKB\n", |
| name, 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(struct osst_tape *STp, struct osst_request ** aSRpnt, int forward) |
| { |
| int result; |
| char * name = tape_name(STp); |
| |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Stepping over filemark %s.\n", |
| name, 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_WARNING "%s:W: Stepping over filemark %s failed.\n", |
| name, forward ? "forward" : "backward"); |
| |
| return result; |
| } |
| |
| |
| /* Get the tape position. */ |
| |
| static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt) |
| { |
| unsigned char scmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| int result = 0; |
| char * name = tape_name(STp); |
| |
| /* 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; |
| |
| 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, DMA_FROM_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| if (!SRpnt) { |
| STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize; |
| return (-EBUSY); |
| } |
| *aSRpnt = SRpnt; |
| |
| if (STp->buffer->syscall_result) |
| result = ((SRpnt->sense[2] & 0x0f) == 3) ? -EIO : -EINVAL; /* 3: Write Error */ |
| |
| if (result == -EINVAL) |
| printk(KERN_ERR "%s:E: Can't read tape position.\n", name); |
| else { |
| if (result == -EIO) { /* re-read position - this needs to preserve media errors */ |
| unsigned char mysense[16]; |
| memcpy (mysense, SRpnt->sense, 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, DMA_FROM_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reread position, reason=[%02x:%02x:%02x], result=[%s%02x:%02x:%02x]\n", |
| name, mysense[2], mysense[12], mysense[13], STp->buffer->syscall_result?"":"ok:", |
| SRpnt->sense[2],SRpnt->sense[12],SRpnt->sense[13]); |
| #endif |
| if (!STp->buffer->syscall_result) |
| memcpy (SRpnt->sense, mysense, 16); |
| else |
| printk(KERN_WARNING "%s:W: Double error in get position\n", name); |
| } |
| 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 "%s:D: Drive Positions: host %d, tape %d%s, buffer %d\n", name, |
| 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(OSST_DEB_MSG "%s:D: Correcting read position %d, %d, %d\n", name, |
| 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(struct osst_tape *STp, struct osst_request ** aSRpnt, int ppos, int skip) |
| { |
| unsigned char scmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| struct st_partstat * STps; |
| int result = 0; |
| int pp = (ppos == 3000 && !skip)? 0 : ppos; |
| char * name = tape_name(STp); |
| |
| if (STp->ready != ST_READY) return (-EIO); |
| |
| STps = &(STp->ps[STp->partition]); |
| |
| if (ppos < 0 || ppos > STp->capacity) { |
| printk(KERN_WARNING "%s:W: Reposition request %d out of range\n", name, ppos); |
| pp = ppos = ppos < 0 ? 0 : (STp->capacity - 1); |
| result = (-EINVAL); |
| } |
| |
| do { |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Setting ppos to %d.\n", name, pp); |
| #endif |
| memset (scmd, 0, MAX_COMMAND_SIZE); |
| scmd[0] = SEEK_10; |
| scmd[1] = 1; |
| scmd[3] = (pp >> 24); |
| scmd[4] = (pp >> 16); |
| scmd[5] = (pp >> 8); |
| scmd[6] = pp; |
| if (skip) |
| scmd[9] = 0x80; |
| |
| SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, DMA_NONE, STp->long_timeout, |
| MAX_RETRIES, 1); |
| if (!SRpnt) |
| return (-EBUSY); |
| *aSRpnt = SRpnt; |
| |
| if ((STp->buffer)->syscall_result != 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: SEEK command from %d to %d failed.\n", |
| name, STp->first_frame_position, pp); |
| #endif |
| result = (-EIO); |
| } |
| if (pp != ppos) |
| osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE); |
| } while ((pp != ppos) && (pp = ppos)); |
| STp->first_frame_position = STp->last_frame_position = ppos; |
| STps->eof = ST_NOEOF; |
| STps->at_sm = 0; |
| STps->rw = ST_IDLE; |
| STp->frame_in_buffer = 0; |
| return result; |
| } |
| |
| static int osst_write_trailer(struct osst_tape *STp, struct osst_request ** aSRpnt, int leave_at_EOT) |
| { |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| int result = 0; |
| |
| if (STp->write_type != OS_WRITE_NEW_MARK) { |
| /* true unless the user wrote the filemark for us */ |
| result = osst_flush_drive_buffer(STp, aSRpnt); |
| if (result < 0) goto out; |
| result = osst_write_filemark(STp, aSRpnt); |
| if (result < 0) goto out; |
| |
| if (STps->drv_file >= 0) |
| STps->drv_file++ ; |
| STps->drv_block = 0; |
| } |
| result = osst_write_eod(STp, aSRpnt); |
| osst_write_header(STp, aSRpnt, leave_at_EOT); |
| |
| STps->eof = ST_FM; |
| out: |
| 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(struct osst_tape *STp, struct osst_request ** aSRpnt) |
| { |
| int offset, transfer, blks = 0; |
| int result = 0; |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt = *aSRpnt; |
| struct st_partstat * STps; |
| char * name = tape_name(STp); |
| |
| if ((STp->buffer)->writing) { |
| if (SRpnt == (STp->buffer)->last_SRpnt) |
| #if DEBUG |
| { printk(OSST_DEB_MSG |
| "%s:D: aSRpnt points to osst_request that write_behind_check will release -- cleared\n", name); |
| #endif |
| *aSRpnt = SRpnt = NULL; |
| #if DEBUG |
| } else if (SRpnt) |
| printk(OSST_DEB_MSG |
| "%s:D: aSRpnt does not point to osst_request that write_behind_check will release -- strange\n", name); |
| #endif |
| osst_write_behind_check(STp); |
| if ((STp->buffer)->syscall_result) { |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Async write error (flush) %x.\n", |
| name, (STp->buffer)->midlevel_result); |
| #endif |
| if ((STp->buffer)->midlevel_result == INT_MAX) |
| return (-ENOSPC); |
| return (-EIO); |
| } |
| } |
| |
| result = 0; |
| if (STp->dirty == 1) { |
| |
| STp->write_count++; |
| STps = &(STp->ps[STp->partition]); |
| STps->rw = ST_WRITING; |
| offset = STp->buffer->buffer_bytes; |
| blks = (offset + STp->block_size - 1) / STp->block_size; |
| transfer = OS_FRAME_SIZE; |
| |
| if (offset < OS_DATA_SIZE) |
| osst_zero_buffer_tail(STp->buffer); |
| |
| if (STp->poll) |
| if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120)) |
| result = osst_recover_wait_frame(STp, aSRpnt, 1); |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = WRITE_6; |
| cmd[1] = 1; |
| cmd[4] = 1; |
| |
| switch (STp->write_type) { |
| case OS_WRITE_DATA: |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Writing %d blocks to frame %d, lblks %d-%d\n", |
| name, blks, STp->frame_seq_number, |
| STp->logical_blk_num - blks, STp->logical_blk_num - 1); |
| #endif |
| osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++, |
| STp->logical_blk_num - blks, STp->block_size, blks); |
| break; |
| case OS_WRITE_EOD: |
| osst_init_aux(STp, OS_FRAME_TYPE_EOD, STp->frame_seq_number++, |
| STp->logical_blk_num, 0, 0); |
| break; |
| case OS_WRITE_NEW_MARK: |
| osst_init_aux(STp, OS_FRAME_TYPE_MARKER, STp->frame_seq_number++, |
| STp->logical_blk_num++, 0, blks=1); |
| break; |
| case OS_WRITE_HEADER: |
| osst_init_aux(STp, OS_FRAME_TYPE_HEADER, 0, 0, 0, blks=0); |
| break; |
| default: /* probably FILLER */ |
| osst_init_aux(STp, OS_FRAME_TYPE_FILL, 0, 0, 0, 0); |
| } |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Flushing %d bytes, Transfering %d bytes in %d lblocks.\n", |
| name, offset, transfer, blks); |
| #endif |
| |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, DMA_TO_DEVICE, |
| STp->timeout, MAX_RETRIES, 1); |
| *aSRpnt = SRpnt; |
| if (!SRpnt) |
| return (-EBUSY); |
| |
| if ((STp->buffer)->syscall_result != 0) { |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: write sense [0]=0x%02x [2]=%02x [12]=%02x [13]=%02x\n", |
| name, SRpnt->sense[0], SRpnt->sense[2], |
| SRpnt->sense[12], SRpnt->sense[13]); |
| #endif |
| if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| (SRpnt->sense[2] & 0x40) && /* FIXME - SC-30 drive doesn't assert EOM bit */ |
| (SRpnt->sense[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 "%s:E: Error on flush write.\n", name); |
| result = (-EIO); |
| } |
| } |
| STps->drv_block = (-1); /* FIXME - even if write recovery succeeds? */ |
| } |
| else { |
| STp->first_frame_position++; |
| STp->dirty = 0; |
| (STp->buffer)->buffer_bytes = 0; |
| } |
| } |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Exit flush write buffer with code %d\n", name, result); |
| #endif |
| return result; |
| } |
| |
| |
| /* Flush the tape buffer. The tape will be positioned correctly unless |
| seek_next is true. */ |
| static int osst_flush_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt, int seek_next) |
| { |
| struct st_partstat * STps; |
| int backspace = 0, result = 0; |
| #if DEBUG |
| char * name = tape_name(STp); |
| #endif |
| |
| /* |
| * If there was a bus reset, block further access |
| * to this device. |
| */ |
| if( STp->pos_unknown) |
| return (-EIO); |
| |
| if (STp->ready != ST_READY) |
| return 0; |
| |
| STps = &(STp->ps[STp->partition]); |
| if (STps->rw == ST_WRITING || STp->dirty) { /* Writing */ |
| STp->write_type = OS_WRITE_DATA; |
| return osst_flush_write_buffer(STp, aSRpnt); |
| } |
| if (STp->block_size == 0) |
| return 0; |
| |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reached flush (read) buffer\n", name); |
| #endif |
| |
| if (!STp->can_bsr) { |
| 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; |
| STp->frame_in_buffer = 0; /* FIXME is this relevant w. OSST? */ |
| } |
| |
| if (!seek_next) { |
| if (STps->eof == ST_FM_HIT) { |
| result = cross_eof(STp, aSRpnt, 0); /* 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; |
| } |
| |
| static int osst_write_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int synchronous) |
| { |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt; |
| int blks; |
| #if DEBUG |
| char * name = tape_name(STp); |
| #endif |
| |
| if ((!STp-> raw) && (STp->first_frame_position == 0xbae)) { /* _must_ preserve buffer! */ |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Reaching config partition.\n", name); |
| #endif |
| if (osst_flush_drive_buffer(STp, aSRpnt) < 0) { |
| return (-EIO); |
| } |
| /* error recovery may have bumped us past the header partition */ |
| if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Skipping over config partition.\n", name); |
| #endif |
| osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8); |
| } |
| } |
| |
| if (STp->poll) |
| if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -48, 120)) |
| if (osst_recover_wait_frame(STp, aSRpnt, 1)) |
| return (-EIO); |
| |
| // osst_build_stats(STp, &SRpnt); |
| |
| STp->ps[STp->partition].rw = ST_WRITING; |
| STp->write_type = OS_WRITE_DATA; |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| cmd[0] = WRITE_6; |
| cmd[1] = 1; |
| cmd[4] = 1; /* one frame at a time... */ |
| blks = STp->buffer->buffer_bytes / STp->block_size; |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Writing %d blocks to frame %d, lblks %d-%d\n", name, blks, |
| STp->frame_seq_number, STp->logical_blk_num - blks, STp->logical_blk_num - 1); |
| #endif |
| osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++, |
| STp->logical_blk_num - blks, STp->block_size, blks); |
| |
| #if DEBUG |
| if (!synchronous) |
| STp->write_pending = 1; |
| #endif |
| SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, STp->timeout, |
| MAX_RETRIES, synchronous); |
| if (!SRpnt) |
| return (-EBUSY); |
| *aSRpnt = SRpnt; |
| |
| if (synchronous) { |
| if (STp->buffer->syscall_result != 0) { |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Error on write:\n", name); |
| #endif |
| if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| (SRpnt->sense[2] & 0x40)) { |
| if ((SRpnt->sense[2] & 0x0f) == VOLUME_OVERFLOW) |
| return (-ENOSPC); |
| } |
| else { |
| if (osst_write_error_recovery(STp, aSRpnt, 1)) |
| return (-EIO); |
| } |
| } |
| else |
| STp->first_frame_position++; |
| } |
| |
| STp->write_count++; |
| |
| return 0; |
| } |
| |
| /* Lock or unlock the drive door. Don't use when struct osst_request allocated. */ |
| static int do_door_lock(struct osst_tape * STp, int do_lock) |
| { |
| int retval, cmd; |
| |
| cmd = do_lock ? SCSI_IOCTL_DOORLOCK : SCSI_IOCTL_DOORUNLOCK; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: %socking drive door.\n", tape_name(STp), do_lock ? "L" : "Unl"); |
| #endif |
| retval = scsi_ioctl(STp->device, cmd, NULL); |
| if (!retval) { |
| STp->door_locked = do_lock ? ST_LOCKED_EXPLICIT : ST_UNLOCKED; |
| } |
| else { |
| STp->door_locked = ST_LOCK_FAILS; |
| } |
| return retval; |
| } |
| |
| /* Set the internal state after reset */ |
| static void reset_state(struct osst_tape *STp) |
| { |
| int i; |
| struct st_partstat *STps; |
| |
| STp->pos_unknown = 0; |
| 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 = 0; |
| STps->drv_block = -1; |
| STps->drv_file = -1; |
| } |
| } |
| |
| |
| /* Entry points to osst */ |
| |
| /* Write command */ |
| static ssize_t osst_write(struct file * filp, const char __user * buf, size_t count, loff_t *ppos) |
| { |
| ssize_t total, retval = 0; |
| ssize_t i, do_count, blks, transfer; |
| int write_threshold; |
| int doing_write = 0; |
| const char __user * b_point; |
| struct osst_request * SRpnt = NULL; |
| struct st_modedef * STm; |
| struct st_partstat * STps; |
| struct osst_tape * STp = filp->private_data; |
| char * name = tape_name(STp); |
| |
| |
| 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 (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->pos_unknown) { |
| retval = (-EIO); |
| goto out; |
| } |
| |
| #if DEBUG |
| if (!STp->in_use) { |
| printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); |
| 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_ERR "%s:E: Write (%Zd bytes) not multiple of tape block size (%d%c).\n", |
| name, count, STp->block_size<1024? |
| STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k'); |
| retval = (-EINVAL); |
| goto out; |
| } |
| |
| if (STp->first_frame_position >= STp->capacity - OSST_EOM_RESERVE) { |
| printk(KERN_ERR "%s:E: Write truncated at EOM early warning (frame %d).\n", |
| name, STp->first_frame_position); |
| retval = (-ENOSPC); |
| goto out; |
| } |
| |
| if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1)) |
| STp->door_locked = ST_LOCKED_AUTO; |
| |
| STps = &(STp->ps[STp->partition]); |
| |
| if (STps->rw == ST_READING) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Switching from read to write at file %d, block %d\n", name, |
| STps->drv_file, STps->drv_block); |
| #endif |
| retval = osst_flush_buffer(STp, &SRpnt, 0); |
| if (retval) |
| goto out; |
| STps->rw = ST_IDLE; |
| } |
| 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_block < 0) || |
| (STps->drv_file == 0 && STps->drv_block == 0)) { |
| STp->wrt_pass_cntr++; |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Allocating next write pass counter: %d\n", |
| name, STp->wrt_pass_cntr); |
| #endif |
| osst_reset_header(STp, &SRpnt); |
| STps->drv_file = STps->drv_block = 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) { /* at EOD */ |
| 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 |
| "%s:D: Cannot write at indeterminate position.\n", name); |
| #endif |
| retval = (-EIO); |
| goto out; |
| } |
| } |
| if ((STps->drv_file + STps->drv_block) > 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 |
| "%s:W: Overwriting file %d with old write pass counter %d\n", |
| name, STps->drv_file, STp->wrt_pass_cntr); |
| printk(KERN_WARNING |
| "%s:W: may lead to stale data being accepted on reading back!\n", |
| name); |
| #if DEBUG |
| printk(OSST_DEB_MSG |
| "%s:D: resetting filemark count to %d and last mark ppos,lbn to %d,%d\n", |
| name, STp->filemark_cnt, STp->last_mark_ppos, STp->last_mark_lbn); |
| #endif |
| } |
| } |
| STp->fast_open = 0; |
| } |
| if (!STp->header_ok) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Write cannot proceed without valid headers\n", name); |
| #endif |
| retval = (-EIO); |
| goto out; |
| } |
| |
| if ((STp->buffer)->writing) { |
| if (SRpnt) printk(KERN_ERR "%s:A: Not supposed to have SRpnt at line %d\n", name, __LINE__); |
| osst_write_behind_check(STp); |
| if ((STp->buffer)->syscall_result) { |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Async write error (write) %x.\n", name, |
| (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) { |
| write_threshold = 1; |
| } |
| else |
| write_threshold = (STp->buffer)->buffer_blocks * STp->block_size; |
| if (!STm->do_async_writes) |
| write_threshold--; |
| |
| total = count; |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Writing %d bytes to file %d block %d lblk %d fseq %d fppos %d\n", |
| name, (int) count, STps->drv_file, STps->drv_block, |
| STp->logical_blk_num, STp->frame_seq_number, 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; |
| } |
| |
| blks = do_count / STp->block_size; |
| STp->logical_blk_num += blks; /* logical_blk_num is incremented as data is moved from user */ |
| |
| i = osst_write_frame(STp, &SRpnt, 1); |
| |
| if (i == (-ENOSPC)) { |
| transfer = STp->buffer->writing; /* FIXME -- check this logic */ |
| 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 "%s:D: EOM with %d bytes unwritten.\n", |
| name, (int) 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 "%s:D: EOM with lost data.\n", name); |
| #endif |
| } |
| } |
| else |
| retval = i; |
| |
| if (retval < 0) { |
| if (SRpnt != NULL) { |
| osst_release_request(SRpnt); |
| SRpnt = NULL; |
| } |
| STp->buffer->buffer_bytes = 0; |
| STp->dirty = 0; |
| if (count < total) |
| retval = total - count; |
| goto out; |
| } |
| |
| filp->f_pos += do_count; |
| b_point += do_count; |
| count -= do_count; |
| if (STps->drv_block >= 0) { |
| STps->drv_block += blks; |
| } |
| STp->buffer->buffer_bytes = 0; |
| STp->dirty = 0; |
| } /* end while write threshold exceeded */ |
| |
| if (count != 0) { |
| STp->dirty = 1; |
| i = append_to_buffer(b_point, STp->buffer, count); |
| if (i) { |
| retval = i; |
| goto out; |
| } |
| blks = count / STp->block_size; |
| STp->logical_blk_num += blks; |
| if (STps->drv_block >= 0) { |
| STps->drv_block += blks; |
| } |
| 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)) { |
| /* 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); |
| |
| i = osst_write_frame(STp, &SRpnt, 0); |
| if (i < 0) { |
| retval = (-EIO); |
| goto out; |
| } |
| SRpnt = NULL; /* Prevent releasing this request! */ |
| } |
| STps->at_sm &= (total == 0); |
| if (total > 0) |
| STps->eof = ST_NOEOF; |
| |
| retval = total; |
| |
| out: |
| if (SRpnt != NULL) osst_release_request(SRpnt); |
| |
| up(&STp->lock); |
| |
| return retval; |
| } |
| |
| |
| /* Read command */ |
| static ssize_t osst_read(struct file * filp, char __user * buf, size_t count, loff_t *ppos) |
| { |
| ssize_t total, retval = 0; |
| ssize_t i, transfer; |
| int special; |
| struct st_modedef * STm; |
| struct st_partstat * STps; |
| struct osst_request * SRpnt = NULL; |
| struct osst_tape * STp = filp->private_data; |
| char * name = tape_name(STp); |
| |
| |
| 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 (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 "%s:D: Incorrect device.\n", name); |
| retval = (-EIO); |
| goto out; |
| } |
| #endif |
| /* Must have initialized medium */ |
| if (!STp->header_ok) { |
| retval = (-EIO); |
| goto out; |
| } |
| |
| if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1)) |
| 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; |
| /* FIXME -- this may leave the tape without EOD and up2date headers */ |
| } |
| |
| if ((count % STp->block_size) != 0) { |
| printk(KERN_WARNING |
| "%s:W: Read (%Zd bytes) not multiple of tape block size (%d%c).\n", name, count, |
| STp->block_size<1024?STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k'); |
| } |
| |
| #if DEBUG |
| if (debugging && STps->eof != ST_NOEOF) |
| printk(OSST_DEB_MSG "%s:D: EOF/EOM flag up (%d). Bytes %d\n", name, |
| 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 - STp->block_size + 1 && !special; ) { |
| |
| /* Get new data if the buffer is empty */ |
| if ((STp->buffer)->buffer_bytes == 0) { |
| if (STps->eof == ST_FM_HIT) |
| break; |
| special = osst_get_logical_frame(STp, &SRpnt, STp->frame_seq_number, 0); |
| if (special < 0) { /* No need to continue read */ |
| STp->frame_in_buffer = 0; |
| retval = special; |
| goto out; |
| } |
| } |
| |
| /* 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 "%s:D: EOF up (%d). Left %d, needed %d.\n", name, |
| STps->eof, (STp->buffer)->buffer_bytes, (int) (count - total)); |
| #endif |
| /* force multiple of block size, note block_size may have been adjusted */ |
| transfer = (((STp->buffer)->buffer_bytes < count - total ? |
| (STp->buffer)->buffer_bytes : count - total)/ |
| STp->block_size) * STp->block_size; |
| |
| if (transfer == 0) { |
| printk(KERN_WARNING |
| "%s:W: Nothing can be transfered, requested %Zd, tape block size (%d%c).\n", |
| name, count, STp->block_size < 1024? |
| STp->block_size:STp->block_size/1024, |
| STp->block_size<1024?'b':'k'); |
| break; |
| } |
| i = from_buffer(STp->buffer, buf, transfer); |
| if (i) { |
| retval = i; |
| goto out; |
| } |
| STp->logical_blk_num += transfer / STp->block_size; |
| STps->drv_block += transfer / STp->block_size; |
| filp->f_pos += transfer; |
| buf += transfer; |
| total += transfer; |
| } |
| |
| if ((STp->buffer)->buffer_bytes == 0) { |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Finished with frame %d\n", |
| name, STp->frame_seq_number); |
| #endif |
| STp->frame_in_buffer = 0; |
| STp->frame_seq_number++; /* frame to look for next time */ |
| } |
| } /* 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_2: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) osst_release_request(SRpnt); |
| |
| up(&STp->lock); |
| |
| return retval; |
| } |
| |
| |
| /* Set the driver options */ |
| static void osst_log_options(struct osst_tape *STp, struct st_modedef *STm, char *name) |
| { |
| printk(KERN_INFO |
| "%s:I: Mode %d options: buffer writes: %d, async writes: %d, read ahead: %d\n", |
| name, STp->current_mode, STm->do_buffer_writes, STm->do_async_writes, |
| STm->do_read_ahead); |
| printk(KERN_INFO |
| "%s:I: can bsr: %d, two FMs: %d, fast mteom: %d, auto lock: %d,\n", |
| name, STp->can_bsr, STp->two_fm, STp->fast_mteom, STp->do_auto_lock); |
| printk(KERN_INFO |
| "%s:I: defs for wr: %d, no block limits: %d, partitions: %d, s2 log: %d\n", |
| name, STm->defaults_for_writes, STp->omit_blklims, STp->can_partitions, |
| STp->scsi2_logical); |
| printk(KERN_INFO |
| "%s:I: sysv: %d\n", name, STm->sysv); |
| #if DEBUG |
| printk(KERN_INFO |
| "%s:D: debugging: %d\n", |
| name, debugging); |
| #endif |
| } |
| |
| |
| static int osst_set_options(struct osst_tape *STp, long options) |
| { |
| int value; |
| long code; |
| struct st_modedef * STm; |
| char * name = tape_name(STp); |
| |
| STm = &(STp->modes[STp->current_mode]); |
| if (!STm->defined) { |
| memcpy(STm, &(STp->modes[0]), sizeof(*STm)); |
| modes_defined = 1; |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Initialized mode %d definition from mode 0\n", |
| name, 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, name); |
| } |
| 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, name); |
| } |
| else if (code == MT_ST_WRITE_THRESHOLD) { |
| value = (options & ~MT_ST_OPTIONS) * ST_KILOBYTE; |
| if (value < 1 || value > osst_buffer_size) { |
| printk(KERN_WARNING "%s:W: Write threshold %d too small or too large.\n", |
| name, value); |
| return (-EIO); |
| } |
| STp->write_threshold = value; |
| printk(KERN_INFO "%s:I: Write threshold set to %d bytes.\n", |
| name, 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 "%s:I: Default block size disabled.\n", name); |
| } |
| else { |
| if (value < 512 || value > OS_DATA_SIZE || OS_DATA_SIZE % value) { |
| printk(KERN_WARNING "%s:W: Default block size cannot be set to %d.\n", |
| name, value); |
| return (-EINVAL); |
| } |
| STm->default_blksize = value; |
| printk(KERN_INFO "%s:I: Default block size set to %d bytes.\n", |
| name, 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 "%s:I: Long timeout set to %d seconds.\n", name, |
| (value & ~MT_ST_SET_LONG_TIMEOUT)); |
| } |
| else { |
| STp->timeout = value * HZ; |
| printk(KERN_INFO "%s:I: Normal timeout set to %d seconds.\n", name, 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 "%s:I: Density default disabled.\n", name); |
| } |
| else { |
| STm->default_density = value & 0xff; |
| printk(KERN_INFO "%s:I: Density default set to %x\n", |
| name, STm->default_density); |
| } |
| } |
| else if (code == MT_ST_DEF_DRVBUFFER) { |
| if (value == MT_ST_CLEAR_DEFAULT) { |
| STp->default_drvbuffer = 0xff; |
| printk(KERN_INFO "%s:I: Drive buffer default disabled.\n", name); |
| } |
| else { |
| STp->default_drvbuffer = value & 7; |
| printk(KERN_INFO "%s:I: Drive buffer default set to %x\n", |
| name, 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 "%s:I: Compression default disabled.\n", name); |
| } |
| else { |
| STm->default_compression = (value & 1 ? ST_YES : ST_NO); |
| printk(KERN_INFO "%s:I: Compression default set to %x\n", |
| name, (value & 1)); |
| } |
| } |
| } |
| else |
| return (-EIO); |
| |
| return 0; |
| } |
| |
| |
| /* Internal ioctl function */ |
| static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt, |
| unsigned int cmd_in, unsigned long arg) |
| { |
| int timeout; |
| long ltmp; |
| int i, ioctl_result; |
| int chg_eof = 1; |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt = * aSRpnt; |
| struct st_partstat * STps; |
| int fileno, blkno, at_sm, frame_seq_numbr, logical_blk_num; |
| int datalen = 0, direction = DMA_NONE; |
| char * name = tape_name(STp); |
| |
| 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; |
| frame_seq_numbr = STp->frame_seq_number; |
| logical_blk_num = STp->logical_blk_num; |
| |
| memset(cmd, 0, MAX_COMMAND_SIZE); |
| switch (cmd_in) { |
| case MTFSFM: |
| chg_eof = 0; /* 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); |
| if (fileno >= 0) |
| fileno += arg; |
| blkno = 0; |
| at_sm &= (arg == 0); |
| goto os_bypass; |
| |
| case MTBSF: |
| chg_eof = 0; /* 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); |
| 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 "%s:D: Skipping %lu blocks %s from logical block %d\n", |
| name, 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); |
| fileno = STps->drv_file; |
| blkno = STps->drv_block; |
| 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 "%s:D: Spacing tape forward %d setmarks.\n", name, |
| 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 "%s:D: Spacing tape backward %ld setmarks.\n", |
| name, (-ltmp)); |
| } |
| #endif |
| if (arg != 0) { |
| blkno = fileno = (-1); |
| at_sm = 1; |
| } |
| break; |
| case MTWEOF: |
| if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) { |
| STp->write_type = OS_WRITE_DATA; |
| ioctl_result = osst_flush_write_buffer(STp, &SRpnt); |
| } else |
| ioctl_result = 0; |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Writing %ld filemark(s).\n", name, arg); |
| #endif |
| for (i=0; i<arg; i++) |
| ioctl_result |= osst_write_filemark(STp, &SRpnt); |
| 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) |
| printk(OSST_DEB_MSG "%s:D: Writing %d setmark(s).\n", name, |
| 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) { |
| if (STp->ready == ST_NO_TAPE) |
| cmd[4] = 4; /* open tray */ |
| else |
| 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 "%s:D: Unloading tape.\n", name); |
| break; |
| case MTLOAD: |
| printk(OSST_DEB_MSG "%s:D: Loading tape.\n", name); |
| break; |
| case MTRETEN: |
| printk(OSST_DEB_MSG "%s:D: Retensioning tape.\n", name); |
| break; |
| case MTOFFL: |
| printk(OSST_DEB_MSG "%s:D: Ejecting tape.\n", name); |
| break; |
| } |
| } |
| #endif |
| fileno = blkno = at_sm = frame_seq_numbr = logical_blk_num = 0 ; |
| break; |
| case MTNOP: |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: No-op on tape.\n", name); |
| #endif |
| return 0; /* Should do something ? */ |
| break; |
| case MTEOM: |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Spacing to end of recorded medium.\n", name); |
| #endif |
| if ((osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) || |
| (osst_get_logical_frame(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 "%s:D: No EOD frame found where expected.\n", name); |
| #endif |
| ioctl_result = -EIO; |
| goto os_bypass; |
| } |
| ioctl_result = osst_set_frame_position(STp, &SRpnt, STp->eod_frame_ppos, 0); |
| 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 = 0 ; |
| goto os_bypass; |
| |
| case MTREW: |
| cmd[0] = REZERO_UNIT; /* rewind */ |
| cmd[1] = 1; |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Rewinding tape, Immed=%d.\n", name, cmd[1]); |
| #endif |
| fileno = blkno = at_sm = frame_seq_numbr = logical_blk_num = 0 ; |
| break; |
| |
| case MTSETBLK: /* Set block length */ |
| if ((STps->drv_block == 0 ) && |
| !STp->dirty && |
| ((STp->buffer)->buffer_bytes == 0) && |
| ((arg & MT_ST_BLKSIZE_MASK) >= 512 ) && |
| ((arg & MT_ST_BLKSIZE_MASK) <= OS_DATA_SIZE) && |
| !(OS_DATA_SIZE % (arg & MT_ST_BLKSIZE_MASK)) ) { |
| /* |
| * Only allowed to change the block size if you opened the |
| * device at the beginning of a file before writing anything. |
| * Note, that when reading, changing block_size is futile, |
| * as the size used when writing overrides it. |
| */ |
| STp->block_size = (arg & MT_ST_BLKSIZE_MASK); |
| printk(KERN_INFO "%s:I: Block size set to %d bytes.\n", |
| name, STp->block_size); |
| return 0; |
| } |
| case MTSETDENSITY: /* Set tape density */ |
| case MTSETDRVBUFFER: /* Set drive buffering */ |
| case SET_DENS_AND_BLK: /* Set density and block size */ |
| chg_eof = 0; |
| 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->block_size ) { |
| printk(KERN_WARNING "%s:W: Illegal to set block size to %d%s.\n", |
| name, (int)(arg & MT_ST_BLKSIZE_MASK), |
| (OS_DATA_SIZE % (arg & MT_ST_BLKSIZE_MASK))?"":" now"); |
| return (-EINVAL); |
| } |
| return 0; /* FIXME silently ignore if block size didn't change */ |
| |
| default: |
| return (-ENOSYS); |
| } |
| |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, datalen, direction, timeout, MAX_RETRIES, 1); |
| |
| ioctl_result = (STp->buffer)->syscall_result; |
| |
| if (!SRpnt) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Couldn't exec scsi cmd for IOCTL\n", name); |
| #endif |
| return ioctl_result; |
| } |
| |
| if (!ioctl_result) { /* SCSI command successful */ |
| STp->frame_seq_number = frame_seq_numbr; |
| STp->logical_blk_num = logical_blk_num; |
| } |
| |
| os_bypass: |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: IOCTL (%d) Result=%d\n", name, cmd_in, ioctl_result); |
| #endif |
| |
| if (!ioctl_result) { /* success */ |
| |
| 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; |
| |
| if (cmd_in == MTEOM) |
| STps->eof = ST_EOD; |
| else if ((cmd_in == MTFSFM || cmd_in == MTBSF) && STps->eof == ST_FM_HIT) { |
| ioctl_result = osst_seek_logical_blk(STp, &SRpnt, STp->logical_blk_num-1); |
| STps->drv_block++; |
| STp->logical_blk_num++; |
| STp->frame_seq_number++; |
| STp->frame_in_buffer = 0; |
| STp->buffer->read_pointer = 0; |
| } |
| 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) { |
| for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| STp->ps[i].rw = ST_IDLE; |
| STp->ps[i].last_block_valid = 0;/* FIXME - where else is this field maintained? */ |
| } |
| 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->sense[2] & 0x40) { |
| STps->eof = ST_EOM_OK; |
| STps->drv_block = 0; |
| } |
| if (chg_eof) |
| STps->eof = ST_NOEOF; |
| |
| if ((SRpnt->sense[2] & 0x0f) == BLANK_CHECK) |
| STps->eof = ST_EOD; |
| |
| if (cmd_in == MTLOAD && osst_wait_for_medium(STp, &SRpnt, 60)) |
| ioctl_result = osst_wait_ready(STp, &SRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE); |
| } |
| *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, new_session = 0, retval = 0; |
| unsigned char cmd[MAX_COMMAND_SIZE]; |
| struct osst_request * SRpnt = NULL; |
| struct osst_tape * STp; |
| struct st_modedef * STm; |
| struct st_partstat * STps; |
| char * name; |
| int dev = TAPE_NR(inode); |
| int mode = TAPE_MODE(inode); |
| |
| /* |
| * We really want to do nonseekable_open(inode, filp); here, but some |
| * versions of tar incorrectly call lseek on tapes and bail out if that |
| * fails. So we disallow pread() and pwrite(), but permit lseeks. |
| */ |
| filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE); |
| |
| write_lock(&os_scsi_tapes_lock); |
| if (dev >= osst_max_dev || os_scsi_tapes == NULL || |
| (STp = os_scsi_tapes[dev]) == NULL || !STp->device) { |
| write_unlock(&os_scsi_tapes_lock); |
| return (-ENXIO); |
| } |
| |
| name = tape_name(STp); |
| |
| if (STp->in_use) { |
| write_unlock(&os_scsi_tapes_lock); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Device already in use.\n", name); |
| #endif |
| return (-EBUSY); |
| } |
| if (scsi_device_get(STp->device)) { |
| write_unlock(&os_scsi_tapes_lock); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Failed scsi_device_get.\n", name); |
| #endif |
| return (-ENXIO); |
| } |
| filp->private_data = STp; |
| STp->in_use = 1; |
| write_unlock(&os_scsi_tapes_lock); |
| STp->rew_at_close = TAPE_REWIND(inode); |
| |
| if( !scsi_block_when_processing_errors(STp->device) ) { |
| return -ENXIO; |
| } |
| |
| if (mode != STp->current_mode) { |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Mode change from %d to %d.\n", |
| name, STp->current_mode, mode); |
| #endif |
| new_session = 1; |
| STp->current_mode = mode; |
| } |
| STm = &(STp->modes[STp->current_mode]); |
| |
| flags = filp->f_flags; |
| STp->write_prot = ((flags & O_ACCMODE) == O_RDONLY); |
| |
| STp->raw = TAPE_IS_RAW(inode); |
| if (STp->raw) |
| STp->header_ok = 0; |
| |
| /* Allocate data segments for this device's tape buffer */ |
| if (!enlarge_buffer(STp->buffer, STp->restr_dma)) { |
| printk(KERN_ERR "%s:E: Unable to allocate memory segments for tape buffer.\n", name); |
| retval = (-EOVERFLOW); |
| 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 *) (page_address(STp->buffer->sg[i].page) + OS_DATA_SIZE - b_size); |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: b_data points to %p in segment 0 at %p\n", name, |
| STp->buffer->b_data, page_address(STp->buffer->sg[0].page)); |
| printk(OSST_DEB_MSG "%s:D: AUX points to %p in segment %d at %p\n", name, |
| STp->buffer->aux, i, page_address(STp->buffer->sg[i].page)); |
| #endif |
| } else { |
| STp->buffer->aux = NULL; /* this had better never happen! */ |
| printk(KERN_NOTICE "%s:A: Framesize %d too large for buffer.\n", name, OS_FRAME_SIZE); |
| retval = (-EIO); |
| goto err_out; |
| } |
| STp->buffer->writing = 0; |
| STp->buffer->syscall_result = 0; |
| STp->dirty = 0; |
| for (i=0; i < ST_NBR_PARTITIONS; i++) { |
| STps = &(STp->ps[i]); |
| STps->rw = ST_IDLE; |
| } |
| STp->ready = ST_READY; |
| #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, DMA_NONE, STp->timeout, MAX_RETRIES, 1); |
| if (!SRpnt) { |
| retval = (STp->buffer)->syscall_result; /* FIXME - valid? */ |
| goto err_out; |
| } |
| if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| (SRpnt->sense[2] & 0x0f) == NOT_READY && |
| SRpnt->sense[12] == 4 ) { |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Unit not ready, cause %x\n", name, SRpnt->sense[13]); |
| #endif |
| if (filp->f_flags & O_NONBLOCK) { |
| retval = -EAGAIN; |
| goto err_out; |
| } |
| if (SRpnt->sense[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, DMA_NONE, |
| STp->timeout, MAX_RETRIES, 1); |
| } |
| osst_wait_ready(STp, &SRpnt, (SRpnt->sense[13]==1?15:3) * 60, 0); |
| } |
| if ((SRpnt->sense[0] & 0x70) == 0x70 && |
| (SRpnt->sense[2] & 0x0f) == UNIT_ATTENTION) { /* New media? */ |
| #if DEBUG |
| printk(OSST_DEB_MSG "%s:D: Unit wants attention\n", name); |
| #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, DMA_NONE, |
| STp->timeout, MAX_RETRIES, 1); |
| if ((SRpnt->sense[0] & 0x70) != 0x70 || |
| (SRpnt->sense[2] & 0x0f) != UNIT_ATTENTION) |
| break; |
| } |
| |
| STp->pos_unknown = 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; /* FIXME - seems to be redundant... */ |
| STps->eof = ST_NOEOF; |
| STps->at_sm = 0; |
| STps->last_block_valid = 0; |
| STps->drv_block = 0; |
| STps->drv_file = 0 ; |
| } |
| new_session = 1; |
| STp->recover_count = 0; |
| STp->abort_count = 0; |
| } |
| /* |
| * 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->result && SRpnt->sense[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], DMA_FROM_DEVICE, STp->timeout, 0, 1); |
| |
| 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 "%s:D: Signature was changed to %c%c%c%c\n", name, |
| 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 (do_door_lock(STp, 1)) |
| printk(KERN_INFO "%s:I: Can't lock drive door\n", name); |
| else |
| STp->door_locked = ST_LOCKED_AUTO; |
| } |
| if (!STp->frame_in_buffer) { |
| STp->block_size = (STm->default_blksize > 0) ? |
| STm->default_blksize : OS_DATA_SIZE; |
| STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0; |
| } |
| STp->buffer->buffer_blocks = OS_DATA_SIZE / STp->block_size; |
| STp->fast_open = 1; |
| osst_release_request(SRpnt); |
| return 0; |
| } |
| #if DEBUG |
| if (i != STp->first_frame_position) |
| printk(OSST_DEB_MSG "%s:D: Tape position changed from %d to %d\n", |
| name, i, STp->first_frame_position); |
| #endif |
| STp->header_ok = 0; |
| } |
| STp->fast_open = 0; |
| |
| if ((STp->buffer)->syscall_result != 0 && /* in all error conditions except no medium */ |
| (SRpnt->sense[2] != 2 || SRpnt->sense[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 DEBUG |
| printk(OSST_DEB_MSG "%s:D: Applying soft reset\n", name); |
| #endif |
| SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1); |
| |
| 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, DMA_NONE, |
| STp->timeout, MAX_RETRIES, 1); |
| if ((SRpnt->sense[0] & 0x70) != 0x70 || |
| (SRpnt->sense[2] & 0x0f) == NOT_READY) |
| break; |
| |
| if ((SRpnt->sense[2] & 0x0f) == UNIT_ATTENTION) { |
| STp->pos_unknown = 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 = 0; |
| STps->drv_block = 0; |
| STps->drv_file = 0 ; |
| } |
| new_session = 1; |
| } |
| } |
| } |
| |
| if (osst_wait_ready(STp, &SRpnt, 15 * 60, 0)) /* FIXME - not allowed with NOBLOCK */ |
| printk(KERN_INFO "%s:I: Device did not become Ready in open\n", name); |
| |
| if ((STp->buffer)->syscall_result != 0) { |
| if ((STp->device)->scsi_level >= SCSI_2 && |
| (SRpnt->sense[0] & 0x70) == 0x70 && |
| (SRpnt->sense[2] & 0x0f) == NOT_READY && |
| SRpnt->sense[12] == 0x3a) { /* Check ASC */ |
| STp->ready = ST_NO_TAPE; |
| } else |
| STp->ready = ST_NOT_READY; |
| osst_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; |
| } |
| |
| osst_configure_onstream(STp, &SRpnt); |
| |
| STp->block_size = STp->raw ? OS_FRAME_SIZE : ( |
| (STm->default_blksize > 0) ? STm->default_blksize : OS_DATA_SIZE); |
| STp->buffer->buffer_blocks = STp->raw ? 1 : OS_DATA_SIZE / STp->block_size; |
| STp->buffer->buffer_bytes = |
| STp->buffer->read_pointer = |
| STp->frame_in_buffer = 0; |
| |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Block size: %d, frame size: %d, buffer size: %d (%d blocks).\n", |
| name, 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 "%s:D: Write protected\n", name); |
| #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 "%s:D: New Session\n", name); |
| #endif |
| STp->density_changed = STp->blksize_changed = 0; |
| STp->compression_changed = 0; |
| } |
| |
| /* |
| * properly position the tape and check the ADR headers |
| */ |
| if (STp->door_locked == ST_UNLOCKED) { |
| if (do_door_lock(STp, 1)) |
| printk(KERN_INFO "%s:I: Can't lock drive door\n", name); |
| else |
| STp->door_locked = ST_LOCKED_AUTO; |
| } |
| |
| osst_analyze_headers(STp, &SRpnt); |
| |
| osst_release_request(SRpnt); |
| SRpnt = NULL; |
| |
| return 0; |
| |
| err_out: |
| if (SRpnt != NULL) |
| osst_release_request(SRpnt); |
| normalize_buffer(STp->buffer); |
| STp->header_ok = 0; |
| STp->in_use = 0; |
| scsi_device_put(STp->device); |
| |
| return retval; |
| } |
| |
| |
| /* Flush the tape buffer before close */ |
| static int os_scsi_tape_flush(struct file * filp, fl_owner_t id) |
| { |
| int result = 0, result2; |
| struct osst_tape * STp = filp->private_data; |
| struct st_modedef * STm = &(STp->modes[STp->current_mode]); |
| struct st_partstat * STps = &(STp->ps[STp->partition]); |
| struct osst_request * SRpnt = NULL; |
| char * name = tape_name(STp); |
| |
| if (file_count(filp) > 1) |
| return 0; |
| |
| if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) { |
| STp->write_type = OS_WRITE_DATA; |
| result = osst_flush_write_buffer(STp, &SRpnt); |
| if (result != 0 && result != (-ENOSPC)) |
| goto out; |
| } |
| if ( STps->rw >= ST_WRITING && !STp->pos_unknown) { |
| |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG "%s:D: File length %ld bytes.\n", |
| name, (long)(filp->f_pos)); |
| printk(OSST_DEB_MSG "%s:D: Async write waits %d, finished %d.\n", |
| name, STp->nbr_waits, STp->nbr_finished); |
| } |
| #endif |
| result = osst_write_trailer(STp, &SRpnt, !(STp->rew_at_close)); |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG "%s:D: Buffer flushed, %d EOF(s) written\n", |
| name, 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); /* this is the default path */ |
| else if (STps->eof == ST_FM_HIT) { |
| result = cross_eof(STp, &SRpnt, 0); |
| 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, 1))) || |
| 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->frame_seq_number = STp->logical_blk_num = 0; |
| if (result == 0 && result2 < 0) |
| result = result2; |
| } |
| if (SRpnt) osst_release_request(SRpnt); |
| |
| if (STp->abort_count || STp->recover_count) { |
| printk(KERN_INFO "%s:I:", name); |
| if (STp->abort_count) |
| printk(" %d unrecovered errors", STp->abort_count); |
| if (STp->recover_count) |
| printk(" %d recovered errors", STp->recover_count); |
| if (STp->write_count) |
| printk(" in %d frames written", STp->write_count); |
| if (STp->read_count) |
| printk(" in %d frames read", STp->read_count); |
| printk("\n"); |
| STp->recover_count = 0; |
| STp->abort_count = 0; |
| } |
| STp->write_count = 0; |
| STp->read_count = 0; |
| |
| return result; |
| } |
| |
| |
| /* Close the device and release it */ |
| static int os_scsi_tape_close(struct inode * inode, struct file * filp) |
| { |
| int result = 0; |
| struct osst_tape * STp = filp->private_data; |
| |
| if (STp->door_locked == ST_LOCKED_AUTO) |
| do_door_lock(STp, 0); |
| |
| if (STp->raw) |
| STp->header_ok = 0; |
| |
| normalize_buffer(STp->buffer); |
| write_lock(&os_scsi_tapes_lock); |
| STp->in_use = 0; |
| write_unlock(&os_scsi_tapes_lock); |
| |
| scsi_device_put(STp->device); |
| |
| 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, blk, retval = 0; |
| struct st_modedef * STm; |
| struct st_partstat * STps; |
| struct osst_request * SRpnt = NULL; |
| struct osst_tape * STp = file->private_data; |
| char * name = tape_name(STp); |
| void __user * p = (void __user *)arg; |
| |
| if (down_interruptible(&STp->lock)) |
| return -ERESTARTSYS; |
| |
| #if DEBUG |
| if (debugging && !STp->in_use) { |
| printk(OSST_DEB_MSG "%s:D: Incorrect device.\n", name); |
| 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 DEBUG |
| printk(OSST_DEB_MSG "%s:D: Ioctl %d,%d in %s mode\n", name, |
| cmd_type, cmd_nr, STp->raw?"raw":"normal"); |
| #endif |
| if (cmd_type == _IOC_TYPE(MTIOCTOP) && cmd_nr == _IOC_NR(MTIOCTOP)) { |
| struct mtop mtc; |
| int auto_weof = 0; |
| |
| if (_IOC_SIZE(cmd_in) != sizeof(mtc)) { |
| retval = (-EINVAL); |
| goto out; |
| } |
| |
| i = copy_from_user((char *) &mtc, p, sizeof(struct mtop)); |
| if (i) { |
| retval = (-EFAULT); |
| goto out; |
| } |
| |
| if (mtc.mt_op == MTSETDRVBUFFER && !capable(CAP_SYS_ADMIN)) { |
| printk(KERN_WARNING "%s:W: MTSETDRVBUFFER only allowed for root.\n", name); |
| retval = (-EPERM); |
| goto out; |
| } |
| |
| if (!STm->defined && (mtc.mt_op != MTSETDRVBUFFER && (mtc.mt_count & MT_ST_OPTIONS) == 0)) { |
| retval = (-ENXIO); |
| goto out; |
| } |
| |
| if (!STp->pos_unknown) { |
| |
| 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 == MTFSF || mtc.mt_op == MTFSFM || |
| mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM || |
| 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; |
| } |
| reset_state(STp); |
| /* remove this when the midlevel properly clears was_reset */ |
| STp->device->was_reset = 0; |
| } |
| |
| if (mtc.mt_op != MTCOMPRESSION && mtc.mt_op != MTLOCK && |
| mtc.mt_op != MTNOP && mtc.mt_op != MTSETBLK && |
| mtc.mt_op != MTSETDENSITY && mtc.mt_op != MTSETDRVBUFFER && |
| mtc.mt_op != MTMKPART && mtc.mt_op != MTSETPART && |
| mtc.mt_op != MTWEOF && mtc.mt_op != MTWSM ) { |
| |
| /* |
| * The user tells us to move to another position on the tape. |
| * If we were appending to the tape content, that would leave |
| * the tape without proper end, in that case write EOD and |
| * update the header to reflect its position. |
| */ |
| #if DEBUG |
| printk(KERN_WARNING "%s:D: auto_weod %s at ffp=%d,efp=%d,fsn=%d,lbn=%d,fn=%d,bn=%d\n", name, |
| STps->rw >= ST_WRITING ? "write" : STps->rw == ST_READING ? "read" : "idle", |
| STp->first_frame_position, STp->eod_frame_ppos, STp->frame_seq_number, |
| STp->logical_blk_num, STps->drv_file, STps->drv_block ); |
| #endif |
| if (STps->rw >= ST_WRITING && STp->first_frame_position >= STp->eod_frame_ppos) { |
| auto_weof = ((STp->write_type != OS_WRITE_NEW_MARK) && |
| !(mtc.mt_op == MTREW || mtc.mt_op == MTOFFL)); |
| i = osst_write_trailer(STp, &SRpnt, |
| !(mtc.mt_op == MTREW || mtc.mt_op == MTOFFL)); |
| #if DEBUG |
| printk(KERN_WARNING "%s:D: post trailer xeof=%d,ffp=%d,efp=%d,fsn=%d,lbn=%d,fn=%d,bn=%d\n", |
| name, auto_weof, STp->first_frame_position, STp->eod_frame_ppos, |
| STp->frame_seq_number, STp->logical_blk_num, STps->drv_file, STps->drv_block ); |
| #endif |
| if (i < 0) { |
| retval = i; |
| goto out; |
| } |
| } |
| STps->rw = ST_IDLE; |
| } |
| |
| if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED) |
| do_door_lock(STp, 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 (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 = 0; |
| } |
| 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) { |
| if (STp->raw) |
| i = osst_set_frame_position(STp, &SRpnt, mtc.mt_count, 0); |
| else |
| i = osst_seek_sector(STp, &SRpnt, mtc.mt_count); |
| if (!STp->can_partitions) |
| STp->ps[0].rw = ST_IDLE; |
| retval = i; |
| goto out; |
| } |
| |
| if (mtc.mt_op == MTLOCK || mtc.mt_op == MTUNLOCK) { |
| retval = do_door_lock(STp, (mtc.mt_op == MTLOCK)); |
| goto out; |
| } |
| |
| if (auto_weof) |
| cross_eof(STp, &SRpnt, 0); |
| |
| if (mtc.mt_op == MTCOMPRESSION) |
| retval = -EINVAL; /* OnStream drives don't have compression hardware */ |
| else |
| /* MTBSF MTBSFM MTBSR MTBSS MTEOM MTERASE MTFSF MTFSFB MTFSR MTFSS |
| * MTLOAD MTOFFL MTRESET MTRETEN MTREW MTUNLOAD MTWEOF MTWSM */ |
| 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, 0)) < 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(p, &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; |
| } |
| if (STp->raw) |
| blk = osst_get_frame_position(STp, &SRpnt); |
| else |
| blk = osst_get_sector(STp, &SRpnt); |
| if (blk < 0) { |
| retval = blk; |
| goto out; |
| } |
| mt_pos.mt_blkno = blk; |
| i = copy_to_user(p, &mt_pos, sizeof(struct mtpos)); |
| if (i) |
| retval = -EFAULT; |
| goto out; |
| } |
| if (SRpnt) osst_release_request(SRpnt); |
| |
| up(&STp->lock); |
| |
| return scsi_ioctl(STp->device, cmd_in, p); |
| |
| out: |
| if (SRpnt) osst_release_request(SRpnt); |
| |
| up(&STp->lock); |
| |
| return retval; |
| } |
| |
| #ifdef CONFIG_COMPAT |
| static long osst_compat_ioctl(struct file * file, unsigned int cmd_in, unsigned long arg) |
| { |
| struct osst_tape *STp = file->private_data; |
| struct scsi_device *sdev = STp->device; |
| int ret = -ENOIOCTLCMD; |
| if (sdev->host->hostt->compat_ioctl) { |
| |
| ret = sdev->host->hostt->compat_ioctl(sdev, cmd_in, (void __user *)arg); |
| |
| } |
| return ret; |
| } |
| #endif |
| |
| |
| |
| /* Memory handling routines */ |
| |
| /* Try to allocate a new tape buffer skeleton. Caller must not hold os_scsi_tapes_lock */ |
| static struct osst_buffer * new_tape_buffer( int from_initialization, int need_dma, int max_sg ) |
| { |
| int i; |
| gfp_t priority; |
| struct osst_buffer *tb; |
| |
| if (from_initialization) |
| priority = GFP_ATOMIC; |
| else |
| priority = GFP_KERNEL; |
| |
| i = sizeof(struct osst_buffer) + (osst_max_sg_segs - 1) * sizeof(struct scatterlist); |
| tb = kzalloc(i, priority); |
| if (!tb) { |
| printk(KERN_NOTICE "osst :I: Can't allocate new tape buffer.\n"); |
| return NULL; |
| } |
| |
| tb->sg_segs = tb->orig_sg_segs = 0; |
| tb->use_sg = max_sg; |
| tb->in_use = 1; |
| tb->dma = need_dma; |
| tb->buffer_size = 0; |
| #if DEBUG |
| if (debugging) |
| printk(OSST_DEB_MSG |
| "osst :D: Allocated tape buffer skeleton (%d bytes, %d segments, dma: %d).\n", |
| i, max_sg, need_dma); |
| #endif |
| return tb; |
| } |
| |
| /* Try to allocate a temporary (while a user has the device open) enlarged tape buffer */ |
| static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma) |
| { |
| int segs, nbr, max_segs, b_size, order, got; |
| gfp_t priority; |
| |
| if (STbuffer->buffer_size >= OS_FRAME_SIZE) |
| return 1; |
| |
| if (STbuffer->sg_segs) { |
| printk(KERN_WARNING "osst :A: Buffer not previously normalized.\n"); |
| normalize_buffer(STbuffer); |
| } |
| /* See how many segments we can use -- need at least two */ |
| nbr = max_segs = STbuffer->use_sg; |
| if (nbr <= 2) |
| return 0; |
| |
| priority = GFP_KERNEL /* | __GFP_NOWARN */; |
| if (need_dma) |
| priority |= GFP_DMA; |
| |
| /* Try to allocate the first segment up to OS_DATA_SIZE and the others |
| big enough to reach the goal (code assumes no segments in place) */ |
| for (b_size = OS_DATA_SIZE, order = OSST_FIRST_ORDER; b_size >= PAGE_SIZE; order--, b_size /= 2) { |
| STbuffer->sg[0].page = alloc_pages(priority, order); |
| STbuffer->sg[0].offset = 0; |
| if (STbuffer->sg[0].page != NULL) { |
| STbuffer->sg[0].length = b_size; |
| STbuffer->b_data = page_address(STbuffer->sg[0].page); |
| break; |
| } |
| } |
| if (STbuffer->sg[0].page == NULL) { |
| printk(KERN_NOTICE "osst :I: Can't allocate tape buffer main segment.\n"); |
| return 0; |
| } |
| /* Got initial segment of 'bsize,order', continue with same size if possible, except for AUX */ |
| for (segs=STbuffer->sg_segs=1, got=b_size; |
| segs < max_segs && got < OS_FRAME_SIZE; ) { |
| STbuffer->sg[segs].page = |
| alloc_pages(priority, (OS_FRAME_SIZE - got <= PAGE_SIZE) ? 0 : order); |
| STbuffer->sg[segs].offset = 0; |
| if (STbuffer->sg[segs].page == NULL) { |
| if (OS_FRAME_SIZE - got <= (max_segs - segs) * b_size / 2 && order) { |
| b_size /= 2; /* Large enough for the rest of the buffers */ |
| order--; |
| continue; |
| } |
| printk(KERN_WARNING "osst :W: Failed to enlarge buffer to %d bytes.\n", |
| OS_FRAME_SIZE); |
| #if DEBUG |
| STbuffer->buffer_size = got; |
| #endif |
| normalize_buffer(STbuffer); |
| return 0; |
| } |
| STbuffer->sg[segs].length = (OS_FRAME_SIZE - got <= PAGE_SIZE / 2) ? (OS_FRAME_SIZE - got) : b_size; |
| got += STbuffer->sg[segs].length; |
| STbuffer->buffer_size = got; |
| STbuffer->sg_segs = ++segs; |
| } |
| #if DEBUG |
| if (debugging) { |
| printk(OSST_DEB_MSG |
| "osst :D: Expanded tape buffer (%d bytes, %d->%d segments, dma: %d, at: %p).\n", |
| got, STbuffer->orig_sg_segs, STbuffer->sg_segs, need_dma, STbuffer->b_data); |
| printk(OSST_DEB_MSG |
| "osst :D: segment sizes: first %d at %p, last %d bytes at %p.\n", |
| STbuffer->sg[0].length, page_address(STbuffer->sg[0].page), |
| STbuffer->sg[segs-1].length, page_address(STbuffer->sg[segs-1].page)); |
| } |
| #endif |
| |
| return 1; |
| } |
| |
| |
| /* Release the segments */ |
| static void normalize_buffer(struct osst_buffer *STbuffer) |
| { |
| int i, order, b_size; |
| |
| for (i=0; i < STbuffer->sg_segs; i++) { |
| |
| for (b_size = PAGE_SIZE, order = 0; |
| b_size < STbuffer->sg[i].length; |
| b_size *= 2, order++); |
| |
| __free_pages(STbuffer->sg[i].page, order); |
| STbuffer->buffer_size -= STbuffer->sg[i].length; |
| } |
| #if DEBUG |
| if (debugging && STbuffer->orig_sg_segs < STbuffer->sg_segs) |
| printk(OSST_DEB_MSG "osst :D: 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 = 0; |
| } |
| |
| |
| /* Move data from the user buffer to the tape buffer. Returns zero (success) or |
| negative error code. */ |
| static int append_to_buffer(const char __user *ubp, struct 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 :A: 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(page_address(st_bp->sg[i].page) + 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 :A: 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(struct osst_buffer *st_bp, char __user *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 :A: 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, page_address(st_bp->sg[i].page) + 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 :A: 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(struct 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 :A: Zero_buffer offset overflow.\n"); |
| return (-EIO); |
| } |
| for (do_count = OS_DATA_SIZE - st_bp->buffer_bytes; |
| 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(page_address(st_bp->sg[i].page) + offset, 0, cnt); |
| do_count -= cnt; |
| offset = 0; |
| } |
| if (do_count) { /* Should never happen */ |
| printk(KERN_WARNING "osst :A: Zero_buffer overflow (left %d).\n", do_count); |
| return (-EIO); |
| } |
| return 0; |
| } |
| |
| /* Copy a osst 32K chunk of memory into the buffer. |
| Returns zero (success) or negative error code. */ |
| static int osst_copy_to_buffer(struct 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(page_address(st_bp->sg[i].page), ptr, cnt); |
| do_count -= cnt; |
| ptr += cnt; |
| } |
| if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ |
| printk(KERN_WARNING "osst :A: Copy_to_buffer overflow (left %d at sg %d).\n", |
| do_count, i); |
| return (-EIO); |
| } |
| return 0; |
| } |
| |
| /* Copy a osst 32K chunk of memory from the buffer. |
| Returns zero (success) or negative error code. */ |
| static int osst_copy_from_buffer(struct 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, page_address(st_bp->sg[i].page), cnt); |
| do_count -= cnt; |
| ptr += cnt; |
| } |
| if (do_count || i != st_bp->sg_segs-1) { /* Should never happen */ |
| printk(KERN_WARNING "osst :A: 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 (max_dev > 0) |
| osst_max_dev = max_dev; |
| 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_sg_segs >= OSST_FIRST_SG) |
| osst_max_sg_segs = max_sg_segs; |
| #if DEBUG |
| printk(OSST_DEB_MSG "osst :D: max tapes %d, write threshold %d, max s/g segs %d.\n", |
| osst_max_dev, osst_write_threshold, osst_max_sg_segs); |
| #endif |
| } |
| |
| #ifndef MODULE |
| /* Set the boot options. Syntax: osst=xxx,yyy,... |
| where xxx is write threshold in 1024 byte blocks, |
| and yyy is number of s/g segments to use. */ |
| 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 >= ARRAY_SIZE(parms)) |
| printk(KERN_INFO "osst :I: 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 = { |
| .owner = THIS_MODULE, |
| .read = osst_read, |
| .write = osst_write, |
| .ioctl = osst_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = osst_compat_ioctl, |
| #endif |
| .open = os_scsi_tape_open, |
| .flush = os_scsi_tape_flush, |
| .release = os_scsi_tape_close, |
| }; |
| |
| static int osst_supports(struct 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; |
| } |
| |
| /* |
| * sysfs support for osst driver parameter information |
| */ |
| |
| static ssize_t osst_version_show(struct device_driver *ddd, char *buf) |
| { |
| return snprintf(buf, PAGE_SIZE, "%s\n", osst_version); |
| } |
| |
| static DRIVER_ATTR(version, S_IRUGO, osst_version_show, NULL); |
| |
| static int osst_create_driverfs_files(struct device_driver *driverfs) |
| { |
| return driver_create_file(driverfs, &driver_attr_version); |
| } |
| |
| static void osst_remove_driverfs_files(struct device_driver *driverfs) |
| { |
| driver_remove_file(driverfs, &driver_attr_version); |
| } |
| |
| /* |
| * sysfs support for accessing ADR header information |
| */ |
| |
| static ssize_t osst_adr_rev_show(struct class_device *class_dev, char *buf) |
| { |
| struct osst_tape * STp = (struct osst_tape *) class_get_devdata (class_dev); |
| ssize_t l = 0; |
| |
| if (STp && STp->header_ok && STp->linux_media) |
| l = snprintf(buf, PAGE_SIZE, "%d.%d\n", STp->header_cache->major_rev, STp->header_cache->minor_rev); |
| return l; |
| } |
| |
| CLASS_DEVICE_ATTR(ADR_rev, S_IRUGO, osst_adr_rev_show, NULL); |
| |
| static ssize_t osst_linux_media_version_show(struct class_device *class_dev, char *buf) |
| { |
| struct osst_tape * STp = (struct osst_tape *) class_get_devdata (class_dev); |
| ssize_t l = 0; |
| |
| if (STp && STp->header_ok && STp->linux_media) |
| l = snprintf(buf, PAGE_SIZE, "LIN%d\n", STp->linux_media_version); |
| return l; |
| } |
| |
| CLASS_DEVICE_ATTR(media_version, S_IRUGO, osst_linux_media_version_show, NULL); |
| |
| static ssize_t osst_capacity_show(struct class_device *class_dev, char *buf) |
| { |
| struct osst_tape * STp = (struct osst_tape *) class_get_devdata (class_dev); |
| ssize_t l = 0; |
| |
| if (STp && STp->header_ok && STp->linux_media) |
| l = snprintf(buf, PAGE_SIZE, "%d\n", STp->capacity); |
| return l; |
| } |
| |
| CLASS_DEVICE_ATTR(capacity, S_IRUGO, osst_capacity_show, NULL); |
| |
| static ssize_t osst_first_data_ppos_show(struct class_device *class_dev, char *buf) |
| { |
| struct osst_tape * STp = (struct osst_tape *) class_get_devdata (class_dev); |
| ssize_t l = 0; |
| |
| if (STp && STp->header_ok && STp->linux_media) |
| l = snprintf(buf, PAGE_SIZE, "%d\n", STp->first_data_ppos); |
| return l; |
| } |
| |
| CLASS_DEVICE_ATTR(BOT_frame, S_IRUGO, osst_first_data_ppos_show, NULL); |
| |
| static ssize_t osst_eod_frame_ppos_show(struct class_device *class_dev, char *buf) |
| { |
| struct osst_tape * STp = (struct osst_tape *) class_get_devdata (class_dev); |
| ssize_t l = 0; |
| |
| if (STp && STp->header_ok && STp->linux_media) |
| l = snprintf(buf, PAGE_SIZE, "%d\n", STp->eod_frame_ppos); |
| return l; |
| } |
| |
| CLASS_DEVICE_ATTR(EOD_frame, S_IRUGO, osst_eod_frame_ppos_show, NULL); |
| |
| static ssize_t osst_filemark_cnt_show(struct class_device *class_dev, char *buf) |
| { |
| struct osst_tape * STp = (struct osst_tape *) class_get_devdata (class_dev); |
| ssize_t l = 0; |
| |
| if (STp && STp->header_ok && STp->linux_media) |
| l = snprintf(buf, PAGE_SIZE, "%d\n", STp->filemark_cnt); |
| return l; |
| } |
| |
| CLASS_DEVICE_ATTR(file_count, S_IRUGO, osst_filemark_cnt_show, NULL); |
| |
| static struct class *osst_sysfs_class; |
| |
| static int osst_sysfs_init(void) |
| { |
| osst_sysfs_class = class_create(THIS_MODULE, "onstream_tape"); |
| if (IS_ERR(osst_sysfs_class)) { |
| printk(KERN_ERR "osst :W: Unable to register sysfs class\n"); |
| return PTR_ERR(osst_sysfs_class); |
| } |
| |
| return 0; |
| } |
| |
| static void osst_sysfs_destroy(dev_t dev) |
| { |
| class_device_destroy(osst_sysfs_class, dev); |
| } |
| |
| static int osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * STp, char * name) |
| { |
| struct class_device *osst_class_member; |
| int err; |
| |
| osst_class_member = class_device_create(osst_sysfs_class, NULL, dev, |
| device, "%s", name); |
| if (IS_ERR(osst_class_member)) { |
| printk(KERN_WARNING "osst :W: Unable to add sysfs class member %s\n", name); |
| return PTR_ERR(osst_class_member); |
| } |
| |
| class_set_devdata(osst_class_member, STp); |
| err = class_device_create_file(osst_class_member, |
| &class_device_attr_ADR_rev); |
| if (err) |
| goto err_out; |
| err = class_device_create_file(osst_class_member, |
| &class_device_attr_media_version); |
| if (err) |
| goto err_out; |
| err = class_device_create_file(osst_class_member, |
| &class_device_attr_capacity); |
| if (err) |
| goto err_out; |
| err = class_device_create_file(osst_class_member, |
| &class_device_attr_BOT_frame); |
| if (err) |
| goto err_out; |
| err = class_device_create_file(osst_class_member, |
| &class_device_attr_EOD_frame); |
| if (err) |
| goto err_out; |
| err = class_device_create_file(osst_class_member, |
| &class_device_attr_file_count); |
| if (err) |
| goto err_out; |
| |
| return 0; |
| |
| err_out: |
| osst_sysfs_destroy(dev); |
| return err; |
| } |
| |
| static void osst_sysfs_cleanup(void) |
| { |
| class_destroy(osst_sysfs_class); |
| } |
| |
| /* |
| * osst startup / cleanup code |
| */ |
| |
| static int osst_probe(struct device *dev) |
| { |
| struct scsi_device * SDp = to_scsi_device(dev); |
| struct osst_tape * tpnt; |
| struct st_modedef * STm; |
| struct st_partstat * STps; |
| struct osst_buffer * buffer; |
| struct gendisk * drive; |
| int i, dev_num, err = -ENODEV; |
| |
| if (SDp->type != TYPE_TAPE || !osst_supports(SDp)) |
| return -ENODEV; |
| |
| drive = alloc_disk(1); |
| if (!drive) { |
| printk(KERN_ERR "osst :E: Out of memory. Device not attached.\n"); |
| return -ENODEV; |
| } |
| |
| /* if this is the first attach, build the infrastructure */ |
| write_lock(&os_scsi_tapes_lock); |
| if (os_scsi_tapes == NULL) { |
| os_scsi_tapes = |
| (struct osst_tape **)kmalloc(osst_max_dev * sizeof(struct osst_tape *), |
| GFP_ATOMIC); |
| if (os_scsi_tapes == NULL) { |
| write_unlock(&os_scsi_tapes_lock); |
| printk(KERN_ERR "osst :E: Unable to allocate array for OnStream SCSI tapes.\n"); |
| goto out_put_disk; |
| } |
| for (i=0; i < osst_max_dev; ++i) os_scsi_tapes[i] = NULL; |
| } |
| |
| if (osst_nr_dev >= osst_max_dev) { |
| write_unlock(&os_scsi_tapes_lock); |
| printk(KERN_ERR "osst :E: Too many tape devices (max. %d).\n", osst_max_dev); |
| goto out_put_disk; |
| } |
| |
| /* find a free minor number */ |
| for (i=0; os_scsi_tapes[i] && i<osst_max_dev; i++); |
| if(i >= osst_max_dev) panic ("Scsi_devices corrupt (osst)"); |
| dev_num = i; |
| |
| /* allocate a struct osst_tape for this device */ |
| tpnt = kmalloc(sizeof(struct osst_tape), GFP_ATOMIC); |
| if (tpnt == NULL) { |
| write_unlock(&os_scsi_tapes_lock); |
| printk(KERN_ERR "osst :E: Can't allocate device descriptor, device not attached.\n"); |
| goto out_put_disk; |
| } |
| memset(tpnt, 0, sizeof(struct osst_tape)); |
| |
| /* allocate a buffer for this device */ |
| i = SDp->host->sg_tablesize; |
| if (osst_max_sg_segs < i) |
| i = osst_max_sg_segs; |
| buffer = new_tape_buffer(1, SDp->host->unchecked_isa_dma, i); |
| if (buffer == NULL) { |
| write_unlock(&os_scsi_tapes_lock); |
| printk(KERN_ERR "osst :E: Unable to allocate a tape buffer, device not attached.\n"); |
| kfree(tpnt); |
| goto out_put_disk; |
| } |
| os_scsi_tapes[dev_num] = tpnt; |
| tpnt->buffer = buffer; |
| tpnt->device = SDp; |
| drive->private_data = &tpnt->driver; |
| sprintf(drive->disk_name, "osst%d", dev_num); |
| tpnt->driver = &osst_template; |
| tpnt->drive = drive; |
| tpnt->in_use = 0; |
| tpnt->capacity = 0xfffff; |
| tpnt->dirty = 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->min_block = 512; |
| tpnt->max_block = OS_DATA_SIZE; |
| tpnt->timeout = OSST_TIMEOUT; |
| tpnt->long_timeout = OSST_LONG_TIMEOUT; |
| |
| /* Recognize OnStream tapes */ |
| /* 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); |
| tpnt->omit_blklims = 1; |
| |
| tpnt->poll = (strncmp(SDp->model, "DI-", 3) == 0) || |
| (strncmp(SDp->model, "FW-", 3) == 0) || OSST_FW_NEED_POLL(tpnt->os_fw_rev,SDp); |
| tpnt->frame_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 = 0; |
| 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 = 512; |
| 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 = 0; |
| STps->drv_block = (-1); |
| STps->drv_file = (-1); |
| } |
| |
| tpnt->current_mode = 0; |
| tpnt->modes[0].defined = 1; |
| tpnt->modes[2].defined = 1; |
| tpnt->density_changed = tpnt->compression_changed = tpnt->blksize_changed = 0; |
| |
| init_MUTEX(&tpnt->lock); |
| osst_nr_dev++; |
| write_unlock(&os_scsi_tapes_lock); |
| |
| { |
| char name[8]; |
| |
| /* Rewind entry */ |
| err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num), dev, tpnt, tape_name(tpnt)); |
| if (err) |
| goto out_free_buffer; |
| |
| /* No-rewind entry */ |
| snprintf(name, 8, "%s%s", "n", tape_name(tpnt)); |
| err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num + 128), dev, tpnt, name); |
| if (err) |
| goto out_free_sysfs1; |
| } |
| |
| sdev_printk(KERN_INFO, SDp, |
| "osst :I: Attached OnStream %.5s tape as %s\n", |
| SDp->model, tape_name(tpnt)); |
| |
| return 0; |
| |
| out_free_sysfs1: |
| osst_sysfs_destroy(MKDEV(OSST_MAJOR, dev_num)); |
| out_free_buffer: |
| kfree(buffer); |
| out_put_disk: |
| put_disk(drive); |
| return err; |
| }; |
| |
| static int osst_remove(struct device *dev) |
| { |
| struct scsi_device * SDp = to_scsi_device(dev); |
| struct osst_tape * tpnt; |
| int i; |
| |
| if ((SDp->type != TYPE_TAPE) || (osst_nr_dev <= 0)) |
| return 0; |
| |
| write_lock(&os_scsi_tapes_lock); |
| for(i=0; i < osst_max_dev; i++) { |
| if((tpnt = os_scsi_tapes[i]) && (tpnt->device == SDp)) { |
| osst_sysfs_destroy(MKDEV(OSST_MAJOR, i)); |
| osst_sysfs_destroy(MKDEV(OSST_MAJOR, i+128)); |
| tpnt->device = NULL; |
| put_disk(tpnt->drive); |
| os_scsi_tapes[i] = NULL; |
| osst_nr_dev--; |
| write_unlock(&os_scsi_tapes_lock); |
| vfree(tpnt->header_cache); |
| if (tpnt->buffer) { |
| normalize_buffer(tpnt->buffer); |
| kfree(tpnt->buffer); |
| } |
| kfree(tpnt); |
| return 0; |
| } |
| } |
| write_unlock(&os_scsi_tapes_lock); |
| return 0; |
| } |
| |
| static int __init init_osst(void) |
| { |
| int err; |
| |
| printk(KERN_INFO "osst :I: Tape driver with OnStream support version %s\nosst :I: %s\n", osst_version, cvsid); |
| |
| validate_options(); |
| |
| err = osst_sysfs_init(); |
| if (err) |
| return err; |
| |
| err = register_chrdev(OSST_MAJOR, "osst", &osst_fops); |
| if (err < 0) { |
| printk(KERN_ERR "osst :E: Unable to register major %d for OnStream tapes\n", OSST_MAJOR); |
| goto err_out; |
| } |
| |
| err = scsi_register_driver(&osst_template.gendrv); |
| if (err) |
| goto err_out_chrdev; |
| |
| err = osst_create_driverfs_files(&osst_template.gendrv); |
| if (err) |
| goto err_out_scsidrv; |
| |
| return 0; |
| |
| err_out_scsidrv: |
| scsi_unregister_driver(&osst_template.gendrv); |
| err_out_chrdev: |
| unregister_chrdev(OSST_MAJOR, "osst"); |
| err_out: |
| osst_sysfs_cleanup(); |
| return err; |
| } |
| |
| static void __exit exit_osst (void) |
| { |
| int i; |
| struct osst_tape * STp; |
| |
| osst_remove_driverfs_files(&osst_template.gendrv); |
| scsi_unregister_driver(&osst_template.gendrv); |
| unregister_chrdev(OSST_MAJOR, "osst"); |
| osst_sysfs_cleanup(); |
| |
| if (os_scsi_tapes) { |
| for (i=0; i < osst_max_dev; ++i) { |
| if (!(STp = os_scsi_tapes[i])) continue; |
| /* This is defensive, supposed to happen during detach */ |
| vfree(STp->header_cache); |
| if (STp->buffer) { |
| normalize_buffer(STp->buffer); |
| kfree(STp->buffer); |
| } |
| put_disk(STp->drive); |
| kfree(STp); |
| } |
| kfree(os_scsi_tapes); |
| } |
| printk(KERN_INFO "osst :I: Unloaded.\n"); |
| } |
| |
| module_init(init_osst); |
| module_exit(exit_osst); |