Steve Hirsch, Andreas Koppenh"ofer, Michael Leodolter, Eyal Lebedinsky,
Michael Schaefer, J"org Weule, and Eric Youngdale.
- Copyright 1992 - 2004 Kai Makisara
+ Copyright 1992 - 2007 Kai Makisara
email Kai.Makisara@kolumbus.fi
Some small formal changes - aeb, 950809
Last modified: 18-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Devfs support
*/
-static char *verstr = "20041025";
+static const char *verstr = "20070203";
#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/mtio.h>
+#include <linux/cdrom.h>
#include <linux/ioctl.h>
#include <linux/fcntl.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
#include <linux/moduleparam.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+
#include <asm/uaccess.h>
#include <asm/dma.h>
#include <asm/system.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
-#include <scsi/scsi_request.h>
+#include <scsi/sg.h>
/* The driver prints some debugging information on the console if DEBUG
static int st_dev_max;
static int st_nr_dev;
-static struct class_simple *st_sysfs_class;
+static struct class *st_sysfs_class;
MODULE_AUTHOR("Kai Makisara");
-MODULE_DESCRIPTION("SCSI Tape Driver");
+MODULE_DESCRIPTION("SCSI tape (st) driver");
MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(SCSI_TAPE_MAJOR);
/* Set 'perm' (4th argument) to 0 to disable module_param's definition
* of sysfs parameters (which module_param doesn't yet support).
#endif
/* Bit reversed order to get same names for same minors with all
mode counts */
-static char *st_formats[] = {
+static const char *st_formats[] = {
"", "r", "k", "s", "l", "t", "o", "u",
"m", "v", "p", "x", "a", "y", "q", "z"};
#error "Buffer size should not exceed (2 << 24 - 1) bytes!"
#endif
-DEB( static int debugging = DEBUG; )
+static int debugging = DEBUG;
#define MAX_RETRIES 0
#define MAX_WRITE_RETRIES 0
static void move_buffer_data(struct st_buffer *, int);
static void buf_to_sg(struct st_buffer *, unsigned int);
-static int st_map_user_pages(struct scatterlist *, const unsigned int,
- unsigned long, size_t, int, unsigned long);
static int sgl_map_user_pages(struct scatterlist *, const unsigned int,
unsigned long, size_t, int);
static int sgl_unmap_user_pages(struct scatterlist *, const unsigned int, int);
static int st_probe(struct device *);
static int st_remove(struct device *);
-static int st_init_command(struct scsi_cmnd *);
-static void do_create_driverfs_files(void);
+static int do_create_driverfs_files(void);
static void do_remove_driverfs_files(void);
-static void do_create_class_files(struct scsi_tape *, int, int);
+static int do_create_class_files(struct scsi_tape *, int, int);
static struct scsi_driver st_template = {
.owner = THIS_MODULE,
.probe = st_probe,
.remove = st_remove,
},
- .init_command = st_init_command,
};
static int st_compression(struct scsi_tape *, int);
static int st_int_ioctl(struct scsi_tape *, unsigned int, unsigned long);
+static void scsi_tape_release(struct kref *);
+
+#define to_scsi_tape(obj) container_of(obj, struct scsi_tape, kref)
+
+static DEFINE_MUTEX(st_ref_mutex);
+
\f
#include "osst_detect.h"
#ifndef SIGS_FROM_OSST
{"OnStream", "FW-", "", "osst"}
#endif
+static struct scsi_tape *scsi_tape_get(int dev)
+{
+ struct scsi_tape *STp = NULL;
+
+ mutex_lock(&st_ref_mutex);
+ write_lock(&st_dev_arr_lock);
+
+ if (dev < st_dev_max && scsi_tapes != NULL)
+ STp = scsi_tapes[dev];
+ if (!STp) goto out;
+
+ kref_get(&STp->kref);
+
+ if (!STp->device)
+ goto out_put;
+
+ if (scsi_device_get(STp->device))
+ goto out_put;
+
+ goto out;
+
+out_put:
+ kref_put(&STp->kref, scsi_tape_release);
+ STp = NULL;
+out:
+ write_unlock(&st_dev_arr_lock);
+ mutex_unlock(&st_ref_mutex);
+ return STp;
+}
+
+static void scsi_tape_put(struct scsi_tape *STp)
+{
+ struct scsi_device *sdev = STp->device;
+
+ mutex_lock(&st_ref_mutex);
+ kref_put(&STp->kref, scsi_tape_release);
+ scsi_device_put(sdev);
+ mutex_unlock(&st_ref_mutex);
+}
+
struct st_reject_data {
char *vendor;
char *model;
return tape->disk->disk_name;
}
+
+static void st_analyze_sense(struct st_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 st_chk_result(struct scsi_tape *STp, struct scsi_request * SRpnt)
+static int st_chk_result(struct scsi_tape *STp, struct st_request * SRpnt)
{
- int result = SRpnt->sr_result;
- unsigned char *sense = SRpnt->sr_sense_buffer, scode;
+ int result = SRpnt->result;
+ u8 scode;
DEB(const char *stp;)
char *name = tape_name(STp);
+ struct st_cmdstatus *cmdstatp;
- if (!result) {
- sense[0] = 0; /* We don't have sense data if this byte is zero */
+ if (!result)
return 0;
- }
- if ((driver_byte(result) & DRIVER_MASK) == DRIVER_SENSE)
- scode = sense[2] & 0x0f;
- else {
- sense[0] = 0;
+ cmdstatp = &STp->buffer->cmdstat;
+ st_analyze_sense(SRpnt, cmdstatp);
+
+ if (cmdstatp->have_sense)
+ scode = STp->buffer->cmdstat.sense_hdr.sense_key;
+ else
scode = 0;
- }
DEB(
if (debugging) {
- printk(ST_DEB_MSG "%s: Error: %x, cmd: %x %x %x %x %x %x Len: %d\n",
+ printk(ST_DEB_MSG "%s: Error: %x, cmd: %x %x %x %x %x %x\n",
name, result,
- SRpnt->sr_cmnd[0], SRpnt->sr_cmnd[1], SRpnt->sr_cmnd[2],
- SRpnt->sr_cmnd[3], SRpnt->sr_cmnd[4], SRpnt->sr_cmnd[5],
- SRpnt->sr_bufflen);
- if (driver_byte(result) & DRIVER_SENSE)
- scsi_print_req_sense("st", SRpnt);
- } else ) /* end DEB */
- if (!(driver_byte(result) & DRIVER_SENSE) ||
- ((sense[0] & 0x70) == 0x70 &&
- scode != NO_SENSE &&
- scode != RECOVERED_ERROR &&
- /* scode != UNIT_ATTENTION && */
- scode != BLANK_CHECK &&
- scode != VOLUME_OVERFLOW &&
- SRpnt->sr_cmnd[0] != MODE_SENSE &&
- SRpnt->sr_cmnd[0] != TEST_UNIT_READY)) { /* Abnormal conditions for tape */
- if (driver_byte(result) & DRIVER_SENSE) {
- printk(KERN_WARNING "%s: Error with sense data: ", name);
- scsi_print_req_sense("st", SRpnt);
- } else
+ SRpnt->cmd[0], SRpnt->cmd[1], SRpnt->cmd[2],
+ SRpnt->cmd[3], SRpnt->cmd[4], SRpnt->cmd[5]);
+ if (cmdstatp->have_sense)
+ __scsi_print_sense(name, SRpnt->sense, SCSI_SENSE_BUFFERSIZE);
+ } ) /* end DEB */
+ if (!debugging) { /* Abnormal conditions for tape */
+ if (!cmdstatp->have_sense)
printk(KERN_WARNING
"%s: Error %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));
+ driver_byte(result) & DRIVER_MASK, host_byte(result));
+ else 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) {
+
+ __scsi_print_sense(name, SRpnt->sense, SCSI_SENSE_BUFFERSIZE);
+ }
}
- if (STp->cln_mode >= EXTENDED_SENSE_START) {
+ if (cmdstatp->fixed_format &&
+ STp->cln_mode >= EXTENDED_SENSE_START) { /* Only fixed format sense */
if (STp->cln_sense_value)
- STp->cleaning_req |= ((SRpnt->sr_sense_buffer[STp->cln_mode] &
+ STp->cleaning_req |= ((SRpnt->sense[STp->cln_mode] &
STp->cln_sense_mask) == STp->cln_sense_value);
else
- STp->cleaning_req |= ((SRpnt->sr_sense_buffer[STp->cln_mode] &
+ STp->cleaning_req |= ((SRpnt->sense[STp->cln_mode] &
STp->cln_sense_mask) != 0);
}
- if (sense[12] == 0 && sense[13] == 0x17) /* ASC and ASCQ => cleaning requested */
- STp->cleaning_req = 1;
+ if (cmdstatp->have_sense &&
+ cmdstatp->sense_hdr.asc == 0 && cmdstatp->sense_hdr.ascq == 0x17)
+ STp->cleaning_req = 1; /* ASC and ASCQ => cleaning requested */
STp->pos_unknown |= STp->device->was_reset;
- if ((sense[0] & 0x70) == 0x70 &&
+ if (cmdstatp->have_sense &&
scode == RECOVERED_ERROR
#if ST_RECOVERED_WRITE_FATAL
- && SRpnt->sr_cmnd[0] != WRITE_6
- && SRpnt->sr_cmnd[0] != WRITE_FILEMARKS
+ && SRpnt->cmd[0] != WRITE_6
+ && SRpnt->cmd[0] != WRITE_FILEMARKS
#endif
) {
STp->recover_count++;
DEB(
if (debugging) {
- if (SRpnt->sr_cmnd[0] == READ_6)
+ if (SRpnt->cmd[0] == READ_6)
stp = "read";
- else if (SRpnt->sr_cmnd[0] == WRITE_6)
+ else if (SRpnt->cmd[0] == WRITE_6)
stp = "write";
else
stp = "ioctl";
STp->recover_count);
} ) /* end DEB */
- if ((sense[2] & 0xe0) == 0)
+ if (cmdstatp->flags == 0)
return 0;
}
return (-EIO);
/* Wakeup from interrupt */
-static void st_sleep_done(struct scsi_cmnd * SCpnt)
+static void st_sleep_done(void *data, char *sense, int result, int resid)
{
- int remainder;
- struct scsi_tape *STp = container_of(SCpnt->request->rq_disk->private_data,
- struct scsi_tape, driver);
-
- if ((STp->buffer)->writing &&
- (SCpnt->sense_buffer[0] & 0x70) == 0x70 &&
- (SCpnt->sense_buffer[2] & 0x40)) {
- /* EOM at write-behind, has all been written? */
- if ((SCpnt->sense_buffer[0] & 0x80) != 0)
- remainder = (SCpnt->sense_buffer[3] << 24) |
- (SCpnt->sense_buffer[4] << 16) |
- (SCpnt->sense_buffer[5] << 8) |
- SCpnt->sense_buffer[6];
- else
- remainder = 0;
- if ((SCpnt->sense_buffer[2] & 0x0f) == VOLUME_OVERFLOW ||
- remainder > 0)
- (STp->buffer)->midlevel_result = SCpnt->result; /* Error */
- else
- (STp->buffer)->midlevel_result = INT_MAX; /* OK */
- } else
- (STp->buffer)->midlevel_result = SCpnt->result;
- SCpnt->request->rq_status = RQ_SCSI_DONE;
- (STp->buffer)->last_SRpnt = SCpnt->sc_request;
+ struct st_request *SRpnt = data;
+ struct scsi_tape *STp = SRpnt->stp;
+
+ memcpy(SRpnt->sense, sense, SCSI_SENSE_BUFFERSIZE);
+ (STp->buffer)->cmdstat.midlevel_result = SRpnt->result = result;
DEB( STp->write_pending = 0; )
- complete(SCpnt->request->waiting);
+ if (SRpnt->waiting)
+ complete(SRpnt->waiting);
+}
+
+static struct st_request *st_allocate_request(void)
+{
+ return kzalloc(sizeof(struct st_request), GFP_KERNEL);
+}
+
+static void st_release_request(struct st_request *streq)
+{
+ kfree(streq);
}
/* Do the scsi command. Waits until command performed if do_wait is true.
Otherwise write_behind_check() is used to check that the command
has finished. */
-static struct scsi_request *
-st_do_scsi(struct scsi_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd,
+static struct st_request *
+st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd,
int bytes, int direction, int timeout, int retries, int do_wait)
{
- unsigned char *bp;
+ 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 = scsi_allocate_request(STp->device, GFP_ATOMIC);
+ SRpnt = st_allocate_request();
if (SRpnt == NULL) {
DEBC( printk(KERN_ERR "%s: Can't get SCSI request.\n",
tape_name(STp)); );
(STp->buffer)->syscall_result = (-EBUSY);
return NULL;
}
+ SRpnt->stp = STp;
}
- init_completion(&STp->wait);
- SRpnt->sr_use_sg = STp->buffer->do_dio || (bytes > (STp->buffer)->frp[0].length);
- if (SRpnt->sr_use_sg) {
- if (!STp->buffer->do_dio)
- buf_to_sg(STp->buffer, bytes);
- SRpnt->sr_use_sg = (STp->buffer)->sg_segs;
- bp = (char *) &((STp->buffer)->sg[0]);
- } else
- bp = (STp->buffer)->b_data;
- SRpnt->sr_data_direction = direction;
- SRpnt->sr_cmd_len = 0;
- SRpnt->sr_request->waiting = &(STp->wait);
- SRpnt->sr_request->rq_status = RQ_SCSI_BUSY;
- SRpnt->sr_request->rq_disk = STp->disk;
-
- scsi_do_req(SRpnt, (void *) cmd, bp, bytes,
- st_sleep_done, timeout, retries);
-
- if (do_wait) {
- wait_for_completion(SRpnt->sr_request->waiting);
- SRpnt->sr_request->waiting = NULL;
+ /* 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;
+
+ if (!STp->buffer->do_dio)
+ buf_to_sg(STp->buffer, bytes);
+
+ 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,
+ &((STp->buffer)->sg[0]), bytes, (STp->buffer)->sg_segs,
+ timeout, retries, SRpnt, st_sleep_done, GFP_KERNEL)) {
+ /* could not allocate the buffer or request was too large */
+ (STp->buffer)->syscall_result = (-EBUSY);
+ (STp->buffer)->last_SRpnt = NULL;
+ }
+ else if (do_wait) {
+ wait_for_completion(waiting);
+ SRpnt->waiting = NULL;
(STp->buffer)->syscall_result = st_chk_result(STp, SRpnt);
}
+
return SRpnt;
}
-/* Handle the write-behind checking (downs the semaphore) */
-static void write_behind_check(struct scsi_tape * STp)
+/* Handle the write-behind checking (waits for completion). Returns -ENOSPC if
+ write has been correct but EOM early warning reached, -EIO if write ended in
+ error or zero if write successful. Asynchronous writes are used only in
+ variable block mode. */
+static int write_behind_check(struct scsi_tape * STp)
{
+ int retval = 0;
struct st_buffer *STbuffer;
struct st_partstat *STps;
+ struct st_cmdstatus *cmdstatp;
+ struct st_request *SRpnt;
STbuffer = STp->buffer;
+ if (!STbuffer->writing)
+ return 0;
DEB(
if (STp->write_pending)
) /* end DEB */
wait_for_completion(&(STp->wait));
- (STp->buffer)->last_SRpnt->sr_request->waiting = NULL;
+ SRpnt = STbuffer->last_SRpnt;
+ STbuffer->last_SRpnt = NULL;
+ SRpnt->waiting = NULL;
- (STp->buffer)->syscall_result = st_chk_result(STp, (STp->buffer)->last_SRpnt);
- scsi_release_request((STp->buffer)->last_SRpnt);
+ (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt);
+ st_release_request(SRpnt);
STbuffer->buffer_bytes -= STbuffer->writing;
STps = &(STp->ps[STp->partition]);
else
STps->drv_block += STbuffer->writing / STp->block_size;
}
+
+ cmdstatp = &STbuffer->cmdstat;
+ if (STbuffer->syscall_result) {
+ retval = -EIO;
+ if (cmdstatp->have_sense && !cmdstatp->deferred &&
+ (cmdstatp->flags & SENSE_EOM) &&
+ (cmdstatp->sense_hdr.sense_key == NO_SENSE ||
+ cmdstatp->sense_hdr.sense_key == RECOVERED_ERROR)) {
+ /* EOM at write-behind, has all data been written? */
+ if (!cmdstatp->remainder_valid ||
+ cmdstatp->uremainder64 == 0)
+ retval = -ENOSPC;
+ }
+ if (retval == -EIO)
+ STps->drv_block = -1;
+ }
STbuffer->writing = 0;
- return;
+ DEB(if (debugging && retval)
+ printk(ST_DEB_MSG "%s: Async write error %x, return value %d.\n",
+ tape_name(STp), STbuffer->cmdstat.midlevel_result, retval);) /* end DEB */
+
+ return retval;
}
it messes up the block number). */
static int cross_eof(struct scsi_tape * STp, int forward)
{
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
unsigned char cmd[MAX_COMMAND_SIZE];
cmd[0] = SPACE;
if (!SRpnt)
return (STp->buffer)->syscall_result;
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
- if ((STp->buffer)->midlevel_result != 0)
+ if ((STp->buffer)->cmdstat.midlevel_result != 0)
printk(KERN_ERR "%s: Stepping over filemark %s failed.\n",
tape_name(STp), forward ? "forward" : "backward");
int offset, transfer, blks;
int result;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
struct st_partstat *STps;
- if ((STp->buffer)->writing) {
- write_behind_check(STp);
- if ((STp->buffer)->syscall_result) {
- DEBC(printk(ST_DEB_MSG
- "%s: Async write error (flush) %x.\n",
- tape_name(STp), (STp->buffer)->midlevel_result))
- if ((STp->buffer)->midlevel_result == INT_MAX)
- return (-ENOSPC);
- return (-EIO);
- }
- }
- if (STp->block_size == 0)
- return 0;
+ result = write_behind_check(STp);
+ if (result)
+ return result;
result = 0;
if (STp->dirty == 1) {
STps = &(STp->ps[STp->partition]);
if ((STp->buffer)->syscall_result != 0) {
- if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 &&
- (SRpnt->sr_sense_buffer[2] & 0x40) &&
- (SRpnt->sr_sense_buffer[2] & 0x0f) == NO_SENSE) {
+ struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
+
+ if (cmdstatp->have_sense && !cmdstatp->deferred &&
+ (cmdstatp->flags & SENSE_EOM) &&
+ (cmdstatp->sense_hdr.sense_key == NO_SENSE ||
+ cmdstatp->sense_hdr.sense_key == RECOVERED_ERROR) &&
+ (!cmdstatp->remainder_valid ||
+ cmdstatp->uremainder64 == 0)) { /* All written at EOM early warning */
STp->dirty = 0;
(STp->buffer)->buffer_bytes = 0;
+ if (STps->drv_block >= 0)
+ STps->drv_block += blks;
result = (-ENOSPC);
} else {
printk(KERN_ERR "%s: Error on flush.\n",
tape_name(STp));
+ STps->drv_block = (-1);
result = (-EIO);
}
- STps->drv_block = (-1);
} else {
if (STps->drv_block >= 0)
STps->drv_block += blks;
STp->dirty = 0;
(STp->buffer)->buffer_bytes = 0;
}
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
}
return result;
}
-/* Lock or unlock the drive door. Don't use when scsi_request allocated. */
+/* Lock or unlock the drive door. Don't use when st_request allocated. */
static int do_door_lock(struct scsi_tape * STp, int do_lock)
{
int retval, cmd;
int attentions, waits, max_wait, scode;
int retval = CHKRES_READY, new_session = 0;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt = NULL;
+ struct st_request *SRpnt = NULL;
+ struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
max_wait = do_wait ? ST_BLOCK_SECONDS : 0;
break;
}
- if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70) {
+ if (cmdstatp->have_sense) {
- scode = (SRpnt->sr_sense_buffer[2] & 0x0f);
+ scode = cmdstatp->sense_hdr.sense_key;
if (scode == UNIT_ATTENTION) { /* New media? */
new_session = 1;
if (scode == NOT_READY) {
if (waits < max_wait) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ);
- if (signal_pending(current)) {
+ if (msleep_interruptible(1000)) {
retval = (-EINTR);
break;
}
}
else {
if ((STp->device)->scsi_level >= SCSI_2 &&
- SRpnt->sr_sense_buffer[12] == 0x3a) /* Check ASC */
+ cmdstatp->sense_hdr.asc == 0x3a) /* Check ASC */
retval = CHKRES_NO_TAPE;
else
retval = CHKRES_NOT_READY;
}
if (SRpnt != NULL)
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
return retval;
}
int i, retval, new_session = 0, do_wait;
unsigned char cmd[MAX_COMMAND_SIZE], saved_cleaning;
unsigned short st_flags = filp->f_flags;
- struct scsi_request *SRpnt = NULL;
+ struct st_request *SRpnt = NULL;
struct st_modedef *STm;
struct st_partstat *STps;
char *name = tape_name(STp);
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = filp->f_path.dentry->d_inode;
int mode = TAPE_MODE(inode);
STp->ready = ST_READY;
goto err_out;
}
- if (!SRpnt->sr_result && !SRpnt->sr_sense_buffer[0]) {
+ if (!SRpnt->result && !STp->buffer->cmdstat.have_sense) {
STp->max_block = ((STp->buffer)->b_data[1] << 16) |
((STp->buffer)->b_data[2] << 8) | (STp->buffer)->b_data[3];
STp->min_block = ((STp->buffer)->b_data[4] << 8) |
(STp->buffer)->b_data[5];
if ( DEB( debugging || ) !STp->inited)
- printk(KERN_WARNING
+ printk(KERN_INFO
"%s: Block limits %d - %d bytes.\n", name,
STp->min_block, STp->max_block);
} else {
}
STp->drv_write_prot = ((STp->buffer)->b_data[2] & 0x80) != 0;
}
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
STp->inited = 1;
int dev = TAPE_NR(inode);
char *name;
- nonseekable_open(inode, filp);
+ /*
+ * 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);
+
+ if (!(STp = scsi_tape_get(dev)))
+ return -ENXIO;
+
write_lock(&st_dev_arr_lock);
- if (dev >= st_dev_max || scsi_tapes == NULL ||
- ((STp = scsi_tapes[dev]) == NULL)) {
- write_unlock(&st_dev_arr_lock);
- return (-ENXIO);
- }
filp->private_data = STp;
name = tape_name(STp);
if (STp->in_use) {
write_unlock(&st_dev_arr_lock);
+ scsi_tape_put(STp);
DEB( printk(ST_DEB_MSG "%s: Device already in use.\n", name); )
return (-EBUSY);
}
- if(scsi_device_get(STp->device)) {
- write_unlock(&st_dev_arr_lock);
- return (-ENXIO);
- }
STp->in_use = 1;
write_unlock(&st_dev_arr_lock);
STp->rew_at_close = STp->autorew_dev = (iminor(inode) & 0x80) == 0;
STps = &(STp->ps[i]);
STps->rw = ST_IDLE;
}
+ STp->try_dio_now = STp->try_dio;
STp->recover_count = 0;
DEB( STp->nbr_waits = STp->nbr_finished = 0;
STp->nbr_requests = STp->nbr_dio = STp->nbr_pages = STp->nbr_combinable = 0; )
goto err_out;
if ((filp->f_flags & O_NONBLOCK) == 0 &&
retval != CHKRES_READY) {
- retval = (-EIO);
+ if (STp->ready == NO_TAPE)
+ retval = (-ENOMEDIUM);
+ else
+ retval = (-EIO);
goto err_out;
}
return 0;
err_out:
normalize_buffer(STp->buffer);
STp->in_use = 0;
- scsi_device_put(STp->device);
+ scsi_tape_put(STp);
return retval;
}
\f
/* Flush the tape buffer before close */
-static int st_flush(struct file *filp)
+static int st_flush(struct file *filp, fl_owner_t id)
{
int result = 0, result2;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
struct scsi_tape *STp = filp->private_data;
struct st_modedef *STm = &(STp->modes[STp->current_mode]);
struct st_partstat *STps = &(STp->ps[STp->partition]);
}
DEBC( if (STp->nbr_requests)
- printk(KERN_WARNING "%s: Number of r/w requests %d, dio used in %d, pages %d (%d).\n",
+ printk(KERN_DEBUG "%s: Number of r/w requests %d, dio used in %d, pages %d (%d).\n",
name, STp->nbr_requests, STp->nbr_dio, STp->nbr_pages, STp->nbr_combinable));
if (STps->rw == ST_WRITING && !STp->pos_unknown) {
+ struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
- DEBC(printk(ST_DEB_MSG "%s: File length %lld bytes.\n",
- name, (long long)filp->f_pos);
- printk(ST_DEB_MSG "%s: Async write waits %d, finished %d.\n",
+ DEBC(printk(ST_DEB_MSG "%s: Async write waits %d, finished %d.\n",
name, STp->nbr_waits, STp->nbr_finished);
)
goto out;
}
- if ((STp->buffer)->syscall_result != 0 &&
- ((SRpnt->sr_sense_buffer[0] & 0x70) != 0x70 ||
- (SRpnt->sr_sense_buffer[2] & 0x4f) != 0x40 ||
- ((SRpnt->sr_sense_buffer[0] & 0x80) != 0 &&
- (SRpnt->sr_sense_buffer[3] | SRpnt->sr_sense_buffer[4] |
- SRpnt->sr_sense_buffer[5] |
- SRpnt->sr_sense_buffer[6]) != 0))) {
- /* Filter out successful write at EOM */
- scsi_release_request(SRpnt);
- SRpnt = NULL;
- printk(KERN_ERR "%s: Error on write filemark.\n", name);
- if (result == 0)
- result = (-EIO);
- } else {
- scsi_release_request(SRpnt);
+ if (STp->buffer->syscall_result == 0 ||
+ (cmdstatp->have_sense && !cmdstatp->deferred &&
+ (cmdstatp->flags & SENSE_EOM) &&
+ (cmdstatp->sense_hdr.sense_key == NO_SENSE ||
+ cmdstatp->sense_hdr.sense_key == RECOVERED_ERROR) &&
+ (!cmdstatp->remainder_valid || cmdstatp->uremainder64 == 0))) {
+ /* Write successful at EOM */
+ st_release_request(SRpnt);
SRpnt = NULL;
if (STps->drv_file >= 0)
STps->drv_file++;
cross_eof(STp, 0);
STps->eof = ST_FM;
}
+ else { /* Write error */
+ st_release_request(SRpnt);
+ SRpnt = NULL;
+ printk(KERN_ERR "%s: Error on write filemark.\n", name);
+ if (result == 0)
+ result = (-EIO);
+ }
DEBC(printk(ST_DEB_MSG "%s: Buffer flushed, %d EOF(s) written\n",
name, cmd[4]));
write_lock(&st_dev_arr_lock);
STp->in_use = 0;
write_unlock(&st_dev_arr_lock);
- scsi_device_put(STp->device);
+ scsi_tape_put(STp);
return result;
}
struct st_buffer *STbp = STp->buffer;
if (is_read)
- i = STp->try_dio && try_rdio;
+ i = STp->try_dio_now && try_rdio;
else
- i = STp->try_dio && try_wdio;
+ i = STp->try_dio_now && try_wdio;
+
if (i && ((unsigned long)buf & queue_dma_alignment(
STp->device->request_queue)) == 0) {
- i = st_map_user_pages(&(STbp->sg[0]), STbp->use_sg,
- (unsigned long)buf, count, (is_read ? READ : WRITE),
- STp->max_pfn);
+ i = sgl_map_user_pages(&(STbp->sg[0]), STbp->use_sg,
+ (unsigned long)buf, count, (is_read ? READ : WRITE));
if (i > 0) {
STbp->do_dio = i;
STbp->buffer_bytes = 0; /* can be used as transfer counter */
/* Can be called more than once after each setup_buffer() */
-static void release_buffering(struct scsi_tape *STp)
+static void release_buffering(struct scsi_tape *STp, int is_read)
{
struct st_buffer *STbp;
STbp = STp->buffer;
if (STbp->do_dio) {
- sgl_unmap_user_pages(&(STbp->sg[0]), STbp->do_dio, 0);
+ sgl_unmap_user_pages(&(STbp->sg[0]), STbp->do_dio, is_read);
STbp->do_dio = 0;
+ STbp->sg_segs = 0;
}
}
int async_write;
unsigned char cmd[MAX_COMMAND_SIZE];
const char __user *b_point;
- struct scsi_request *SRpnt = NULL;
+ struct st_request *SRpnt = NULL;
struct scsi_tape *STp = filp->private_data;
struct st_modedef *STm;
struct st_partstat *STps;
}
STbp = STp->buffer;
- if (STbp->writing) {
- write_behind_check(STp);
- if (STbp->syscall_result) {
- DEBC(printk(ST_DEB_MSG "%s: Async write error (write) %x.\n",
- name, STbp->midlevel_result));
- if (STbp->midlevel_result == INT_MAX)
- STps->eof = ST_EOM_OK;
- else
- STps->eof = ST_EOM_ERROR;
- }
+ i = write_behind_check(STp);
+ if (i) {
+ if (i == -ENOSPC)
+ STps->eof = ST_EOM_OK;
+ else
+ STps->eof = ST_EOM_ERROR;
}
if (STps->eof == ST_EOM_OK) {
}
}
count -= do_count;
- filp->f_pos += do_count;
b_point += do_count;
async_write = STp->block_size == 0 && !STbp->do_dio &&
STm->do_async_writes && STps->eof < ST_EOM_OK;
if (STp->block_size != 0 && STm->do_buffer_writes &&
- !(STp->try_dio && try_wdio) && STps->eof < ST_EOM_OK &&
+ !(STp->try_dio_now && try_wdio) && STps->eof < ST_EOM_OK &&
STbp->buffer_bytes < STbp->buffer_size) {
STp->dirty = 1;
/* Don't write a buffer that is not full enough. */
retval = STbp->syscall_result;
goto out;
}
- if (async_write) {
+ if (async_write && !STbp->syscall_result) {
STbp->writing = transfer;
STp->dirty = !(STbp->writing ==
STbp->buffer_bytes);
}
if (STbp->syscall_result != 0) {
+ struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
+
DEBC(printk(ST_DEB_MSG "%s: Error on write:\n", name));
- if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 &&
- (SRpnt->sr_sense_buffer[2] & 0x40)) {
- scode = SRpnt->sr_sense_buffer[2] & 0x0f;
- if ((SRpnt->sr_sense_buffer[0] & 0x80) != 0)
- undone = (SRpnt->sr_sense_buffer[3] << 24) |
- (SRpnt->sr_sense_buffer[4] << 16) |
- (SRpnt->sr_sense_buffer[5] << 8) |
- SRpnt->sr_sense_buffer[6];
+ if (cmdstatp->have_sense && (cmdstatp->flags & SENSE_EOM)) {
+ scode = cmdstatp->sense_hdr.sense_key;
+ if (cmdstatp->remainder_valid)
+ undone = (int)cmdstatp->uremainder64;
else if (STp->block_size == 0 &&
scode == VOLUME_OVERFLOW)
undone = transfer;
undone = 0;
if (STp->block_size != 0)
undone *= STp->block_size;
- filp->f_pos -= undone;
if (undone <= do_count) {
/* Only data from this write is not written */
count += undone;
retval = (-ENOSPC); /* EOM within current request */
DEBC(printk(ST_DEB_MSG
"%s: EOM with %d bytes unwritten.\n",
- name, count));
+ name, (int)count));
} else {
/* EOT within data buffered earlier (possible only
in fixed block mode without direct i/o) */
- if (!retry_eot && (SRpnt->sr_sense_buffer[0] & 1) == 0 &&
+ if (!retry_eot && !cmdstatp->deferred &&
(scode == NO_SENSE || scode == RECOVERED_ERROR)) {
move_buffer_data(STp->buffer, transfer - undone);
retry_eot = 1;
}
}
} else {
- filp->f_pos -= do_count;
count += do_count;
STps->drv_block = (-1); /* Too cautious? */
- retval = (-EIO);
+ retval = STbp->syscall_result;
}
}
out:
if (SRpnt != NULL)
- scsi_release_request(SRpnt);
- release_buffering(STp);
+ st_release_request(SRpnt);
+ release_buffering(STp, 0);
up(&STp->lock);
return retval;
Does release user buffer mapping if it is set.
*/
static long read_tape(struct scsi_tape *STp, long count,
- struct scsi_request ** aSRpnt)
+ struct st_request ** aSRpnt)
{
int transfer, blks, bytes;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
struct st_modedef *STm;
struct st_partstat *STps;
struct st_buffer *STbp;
if (STp->block_size == 0)
blks = bytes = count;
else {
- if (!(STp->try_dio && try_rdio) && STm->do_read_ahead) {
+ if (!(STp->try_dio_now && try_rdio) && STm->do_read_ahead) {
blks = (STp->buffer)->buffer_blocks;
bytes = blks * STp->block_size;
} else {
SRpnt = *aSRpnt;
SRpnt = st_do_scsi(SRpnt, STp, cmd, bytes, DMA_FROM_DEVICE,
STp->device->timeout, MAX_RETRIES, 1);
- release_buffering(STp);
+ release_buffering(STp, 1);
*aSRpnt = SRpnt;
if (!SRpnt)
return STbp->syscall_result;
/* Something to check */
if (STbp->syscall_result) {
+ struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
+
retval = 1;
DEBC(printk(ST_DEB_MSG "%s: Sense: %2x %2x %2x %2x %2x %2x %2x %2x\n",
name,
- SRpnt->sr_sense_buffer[0], SRpnt->sr_sense_buffer[1],
- SRpnt->sr_sense_buffer[2], SRpnt->sr_sense_buffer[3],
- SRpnt->sr_sense_buffer[4], SRpnt->sr_sense_buffer[5],
- SRpnt->sr_sense_buffer[6], SRpnt->sr_sense_buffer[7]));
- if ((SRpnt->sr_sense_buffer[0] & 0x70) == 0x70) { /* extended sense */
+ SRpnt->sense[0], SRpnt->sense[1],
+ SRpnt->sense[2], SRpnt->sense[3],
+ SRpnt->sense[4], SRpnt->sense[5],
+ SRpnt->sense[6], SRpnt->sense[7]));
+ if (cmdstatp->have_sense) {
- if ((SRpnt->sr_sense_buffer[2] & 0x0f) == BLANK_CHECK)
- SRpnt->sr_sense_buffer[2] &= 0xcf; /* No need for EOM in this case */
+ if (cmdstatp->sense_hdr.sense_key == BLANK_CHECK)
+ cmdstatp->flags &= 0xcf; /* No need for EOM in this case */
- if ((SRpnt->sr_sense_buffer[2] & 0xe0) != 0) { /* EOF, EOM, or ILI */
+ if (cmdstatp->flags != 0) { /* EOF, EOM, or ILI */
/* Compute the residual count */
- if ((SRpnt->sr_sense_buffer[0] & 0x80) != 0)
- transfer = (SRpnt->sr_sense_buffer[3] << 24) |
- (SRpnt->sr_sense_buffer[4] << 16) |
- (SRpnt->sr_sense_buffer[5] << 8) |
- SRpnt->sr_sense_buffer[6];
+ if (cmdstatp->remainder_valid)
+ transfer = (int)cmdstatp->uremainder64;
else
transfer = 0;
if (STp->block_size == 0 &&
- (SRpnt->sr_sense_buffer[2] & 0x0f) == MEDIUM_ERROR)
+ cmdstatp->sense_hdr.sense_key == MEDIUM_ERROR)
transfer = bytes;
- if (SRpnt->sr_sense_buffer[2] & 0x20) { /* ILI */
+ if (cmdstatp->flags & SENSE_ILI) { /* ILI */
if (STp->block_size == 0) {
if (transfer <= 0) {
if (transfer < 0)
}
STbp->buffer_bytes = bytes - transfer;
} else {
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = *aSRpnt = NULL;
if (transfer == blks) { /* We did not get anything, error */
printk(KERN_NOTICE "%s: Incorrect block size.\n", name);
if (st_int_ioctl(STp, MTBSR, 1))
return (-EIO);
}
- } else if (SRpnt->sr_sense_buffer[2] & 0x80) { /* FM overrides EOM */
+ } else if (cmdstatp->flags & SENSE_FMK) { /* FM overrides EOM */
if (STps->eof != ST_FM_HIT)
STps->eof = ST_FM_HIT;
else
DEBC(printk(ST_DEB_MSG
"%s: EOF detected (%d bytes read).\n",
name, STbp->buffer_bytes));
- } else if (SRpnt->sr_sense_buffer[2] & 0x40) {
+ } else if (cmdstatp->flags & SENSE_EOM) {
if (STps->eof == ST_FM)
STps->eof = ST_EOD_1;
else
"%s: Tape error while reading.\n", name));
STps->drv_block = (-1);
if (STps->eof == ST_FM &&
- (SRpnt->sr_sense_buffer[2] & 0x0f) == BLANK_CHECK) {
+ cmdstatp->sense_hdr.sense_key == BLANK_CHECK) {
DEBC(printk(ST_DEB_MSG
"%s: Zero returned for first BLANK CHECK after EOF.\n",
name));
ssize_t retval = 0;
ssize_t i, transfer;
int special, do_dio = 0;
- struct scsi_request *SRpnt = NULL;
+ struct st_request *SRpnt = NULL;
struct scsi_tape *STp = filp->private_data;
struct st_modedef *STm;
struct st_partstat *STps;
goto out;
STm = &(STp->modes[STp->current_mode]);
- if (!(STm->do_read_ahead) && STp->block_size != 0 &&
- (count % STp->block_size) != 0) {
- retval = (-EINVAL); /* Read must be integral number of blocks */
- goto out;
+ if (STp->block_size != 0 && (count % STp->block_size) != 0) {
+ if (!STm->do_read_ahead) {
+ retval = (-EINVAL); /* Read must be integral number of blocks */
+ goto out;
+ }
+ STp->try_dio_now = 0; /* Direct i/o can't handle split blocks */
}
STps = &(STp->ps[STp->partition]);
printk(ST_DEB_MSG
"%s: EOF up (%d). Left %d, needed %d.\n", name,
STps->eof, STbp->buffer_bytes,
- count - total);
+ (int)(count - total));
) /* end DEB */
transfer = STbp->buffer_bytes < count - total ?
STbp->buffer_bytes : count - total;
goto out;
}
}
- filp->f_pos += transfer;
buf += transfer;
total += transfer;
}
out:
if (SRpnt != NULL) {
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
}
if (do_dio) {
- release_buffering(STp);
+ release_buffering(STp, 1);
STbp->buffer_bytes = 0;
}
up(&STp->lock);
static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs)
{
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt = NULL;
+ struct st_request *SRpnt = NULL;
memset(cmd, 0, MAX_COMMAND_SIZE);
cmd[0] = MODE_SENSE;
if (SRpnt == NULL)
return (STp->buffer)->syscall_result;
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
return (STp->buffer)->syscall_result;
}
{
int pgo;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt = NULL;
+ struct st_request *SRpnt = NULL;
memset(cmd, 0, MAX_COMMAND_SIZE);
cmd[0] = MODE_SELECT;
if (SRpnt == NULL)
return (STp->buffer)->syscall_result;
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
return (STp->buffer)->syscall_result;
}
DEB( char *name = tape_name(STp); )
unsigned char cmd[MAX_COMMAND_SIZE];
struct st_partstat *STps;
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
if (STp->ready != ST_READY && !load_code) {
if (STp->ready == ST_NO_TAPE)
return (STp->buffer)->syscall_result;
retval = (STp->buffer)->syscall_result;
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
if (!retval) { /* SCSI command successful */
return retval;
}
\f
+#if DEBUG
+#define ST_DEB_FORWARD 0
+#define ST_DEB_BACKWARD 1
+static void deb_space_print(char *name, int direction, char *units, unsigned char *cmd)
+{
+ s32 sc;
+
+ sc = cmd[2] & 0x80 ? 0xff000000 : 0;
+ sc |= (cmd[2] << 16) | (cmd[3] << 8) | cmd[4];
+ if (direction)
+ sc = -sc;
+ printk(ST_DEB_MSG "%s: Spacing tape %s over %d %s.\n", name,
+ direction ? "backward" : "forward", sc, units);
+}
+#endif
+
/* Internal ioctl function */
static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned long arg)
int ioctl_result;
int chg_eof = 1;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
struct st_partstat *STps;
int fileno, blkno, at_sm, undone;
int datalen = 0, direction = DMA_NONE;
cmd[2] = (arg >> 16);
cmd[3] = (arg >> 8);
cmd[4] = arg;
- DEBC(printk(ST_DEB_MSG "%s: Spacing tape forward over %d filemarks.\n",
- name, cmd[2] * 65536 + cmd[3] * 256 + cmd[4]));
+ DEBC(deb_space_print(name, ST_DEB_FORWARD, "filemarks", cmd);)
if (fileno >= 0)
fileno += arg;
blkno = 0;
cmd[2] = (ltmp >> 16);
cmd[3] = (ltmp >> 8);
cmd[4] = ltmp;
- DEBC(
- if (cmd[2] & 0x80)
- ltmp = 0xff000000;
- ltmp = ltmp | (cmd[2] << 16) | (cmd[3] << 8) | cmd[4];
- printk(ST_DEB_MSG
- "%s: Spacing tape backward over %ld filemarks.\n",
- name, (-ltmp));
- )
+ DEBC(deb_space_print(name, ST_DEB_BACKWARD, "filemarks", cmd);)
if (fileno >= 0)
fileno -= arg;
blkno = (-1); /* We can't know the block number */
cmd[2] = (arg >> 16);
cmd[3] = (arg >> 8);
cmd[4] = arg;
- DEBC(printk(ST_DEB_MSG "%s: Spacing tape forward %d blocks.\n", name,
- cmd[2] * 65536 + cmd[3] * 256 + cmd[4]));
+ DEBC(deb_space_print(name, ST_DEB_FORWARD, "blocks", cmd);)
if (blkno >= 0)
blkno += arg;
at_sm &= (arg == 0);
cmd[2] = (ltmp >> 16);
cmd[3] = (ltmp >> 8);
cmd[4] = ltmp;
- DEBC(
- if (cmd[2] & 0x80)
- ltmp = 0xff000000;
- ltmp = ltmp | (cmd[2] << 16) | (cmd[3] << 8) | cmd[4];
- printk(ST_DEB_MSG
- "%s: Spacing tape backward %ld blocks.\n", name, (-ltmp));
- )
+ DEBC(deb_space_print(name, ST_DEB_BACKWARD, "blocks", cmd);)
if (blkno >= 0)
blkno -= arg;
at_sm &= (arg == 0);
cmd[2] = (arg >> 16);
cmd[3] = (arg >> 8);
cmd[4] = arg;
- DEBC(printk(ST_DEB_MSG "%s: Spacing tape forward %d setmarks.\n", name,
- cmd[2] * 65536 + cmd[3] * 256 + cmd[4]));
+ DEBC(deb_space_print(name, ST_DEB_FORWARD, "setmarks", cmd);)
if (arg != 0) {
blkno = fileno = (-1);
at_sm = 1;
cmd[2] = (ltmp >> 16);
cmd[3] = (ltmp >> 8);
cmd[4] = ltmp;
- DEBC(
- if (cmd[2] & 0x80)
- ltmp = 0xff000000;
- ltmp = ltmp | (cmd[2] << 16) | (cmd[3] << 8) | cmd[4];
- printk(ST_DEB_MSG "%s: Spacing tape backward %ld setmarks.\n",
- name, (-ltmp));
- )
+ DEBC(deb_space_print(name, ST_DEB_BACKWARD, "setmarks", cmd);)
if (arg != 0) {
blkno = fileno = (-1);
at_sm = 1;
cmd[1] = 3;
DEBC(printk(ST_DEB_MSG "%s: Spacing to end of recorded medium.\n",
name));
- blkno = 0;
+ blkno = -1;
at_sm = 0;
break;
case MTERASE:
ioctl_result = (STp->buffer)->syscall_result;
if (!ioctl_result) { /* SCSI command successful */
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
STps->drv_block = blkno;
STps->drv_file = fileno;
else if (chg_eof)
STps->eof = ST_NOEOF;
+ if (cmd_in == MTWEOF)
+ STps->rw = ST_IDLE;
} else { /* SCSI command was not completely successful. Don't return
from this block without releasing the SCSI command block! */
+ struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
- if (SRpnt->sr_sense_buffer[2] & 0x40) {
+ if (cmdstatp->flags & SENSE_EOM) {
if (cmd_in != MTBSF && cmd_in != MTBSFM &&
cmd_in != MTBSR && cmd_in != MTBSS)
STps->eof = ST_EOM_OK;
STps->drv_block = 0;
}
- undone = ((SRpnt->sr_sense_buffer[3] << 24) +
- (SRpnt->sr_sense_buffer[4] << 16) +
- (SRpnt->sr_sense_buffer[5] << 8) +
- SRpnt->sr_sense_buffer[6]);
+ if (cmdstatp->remainder_valid)
+ undone = (int)cmdstatp->uremainder64;
+ else
+ undone = 0;
if (cmd_in == MTWEOF &&
- (SRpnt->sr_sense_buffer[0] & 0x70) == 0x70 &&
- (SRpnt->sr_sense_buffer[2] & 0x4f) == 0x40 &&
- ((SRpnt->sr_sense_buffer[0] & 0x80) == 0 || undone == 0)) {
- ioctl_result = 0; /* EOF written succesfully at EOM */
- if (fileno >= 0)
- fileno++;
+ cmdstatp->have_sense &&
+ (cmdstatp->flags & SENSE_EOM)) {
+ if (cmdstatp->sense_hdr.sense_key == NO_SENSE ||
+ cmdstatp->sense_hdr.sense_key == RECOVERED_ERROR) {
+ ioctl_result = 0; /* EOF(s) written successfully at EOM */
+ STps->eof = ST_NOEOF;
+ } else { /* Writing EOF(s) failed */
+ if (fileno >= 0)
+ fileno -= undone;
+ if (undone < arg)
+ STps->eof = ST_NOEOF;
+ }
STps->drv_file = fileno;
- STps->eof = ST_NOEOF;
} else if ((cmd_in == MTFSF) || (cmd_in == MTFSFM)) {
if (fileno >= 0)
STps->drv_file = fileno - undone;
else
STps->drv_file = fileno;
- STps->drv_block = 0;
+ STps->drv_block = -1;
STps->eof = ST_NOEOF;
} else if ((cmd_in == MTBSF) || (cmd_in == MTBSFM)) {
if (arg > 0 && undone < 0) /* Some drives get this wrong */
STps->drv_block = 0;
STps->eof = ST_NOEOF;
} else if (cmd_in == MTFSR) {
- if (SRpnt->sr_sense_buffer[2] & 0x80) { /* Hit filemark */
+ if (cmdstatp->flags & SENSE_FMK) { /* Hit filemark */
if (STps->drv_file >= 0)
STps->drv_file++;
STps->drv_block = 0;
STps->eof = ST_NOEOF;
}
} else if (cmd_in == MTBSR) {
- if (SRpnt->sr_sense_buffer[2] & 0x80) { /* Hit filemark */
+ if (cmdstatp->flags & SENSE_FMK) { /* Hit filemark */
STps->drv_file--;
STps->drv_block = (-1);
} else {
cmd_in == MTSETDENSITY ||
cmd_in == MTSETDRVBUFFER ||
cmd_in == SET_DENS_AND_BLK) {
- if ((SRpnt->sr_sense_buffer[2] & 0x0f) == ILLEGAL_REQUEST &&
+ if (cmdstatp->sense_hdr.sense_key == ILLEGAL_REQUEST &&
!(STp->use_pf & PF_TESTED)) {
/* Try the other possible state of Page Format if not
already tried */
STp->use_pf = !STp->use_pf | PF_TESTED;
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
return st_int_ioctl(STp, cmd_in, arg);
}
} else if (chg_eof)
STps->eof = ST_NOEOF;
- if ((SRpnt->sr_sense_buffer[2] & 0x0f) == BLANK_CHECK)
+ if (cmdstatp->sense_hdr.sense_key == BLANK_CHECK)
STps->eof = ST_EOD;
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
}
{
int result;
unsigned char scmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
DEB( char *name = tape_name(STp); )
if (STp->ready != ST_READY)
DEBC(printk(ST_DEB_MSG "%s: Got tape pos. blk %d part %d.\n", name,
*block, *partition));
}
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
return result;
unsigned int blk;
int timeout;
unsigned char scmd[MAX_COMMAND_SIZE];
- struct scsi_request *SRpnt;
+ struct st_request *SRpnt;
DEB( char *name = tape_name(STp); )
if (STp->ready != ST_READY)
result = 0;
}
- scsi_release_request(SRpnt);
+ st_release_request(SRpnt);
SRpnt = NULL;
return result;
retval = i;
goto out;
}
+ if (STps->rw == ST_WRITING &&
+ (mtc.mt_op == MTREW || mtc.mt_op == MTOFFL ||
+ mtc.mt_op == MTSEEK ||
+ mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM)) {
+ i = st_int_ioctl(STp, MTWEOF, 1);
+ if (i < 0) {
+ retval = i;
+ goto out;
+ }
+ if (mtc.mt_op == MTBSF || mtc.mt_op == MTBSFM)
+ mtc.mt_count++;
+ STps->rw = ST_IDLE;
+ }
+
} else {
/*
* If there was a bus reset, block further access
case SCSI_IOCTL_GET_BUS_NUMBER:
break;
default:
- i = scsi_cmd_ioctl(file, STp->disk, cmd_in, p);
+ if ((cmd_in == SG_IO ||
+ cmd_in == SCSI_IOCTL_SEND_COMMAND ||
+ cmd_in == CDROM_SEND_PACKET) &&
+ !capable(CAP_SYS_RAWIO))
+ i = -EPERM;
+ else
+ i = scsi_cmd_ioctl(file, STp->disk, cmd_in, p);
if (i != -ENOTTY)
return i;
break;
}
- return scsi_ioctl(STp->device, cmd_in, p);
+ retval = scsi_ioctl(STp->device, cmd_in, p);
+ if (!retval && cmd_in == SCSI_IOCTL_STOP_UNIT) { /* unload */
+ STp->rew_at_close = 0;
+ STp->ready = ST_NO_TAPE;
+ }
+ return retval;
out:
up(&STp->lock);
return retval;
}
+
+#ifdef CONFIG_COMPAT
+static long st_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct scsi_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, (void __user *)arg);
+
+ }
+ return ret;
+}
+#endif
+
\f
/* Try to allocate a new tape buffer. Calling function must not hold
static struct st_buffer *
new_tape_buffer(int from_initialization, int need_dma, int max_sg)
{
- int i, priority, got = 0, segs = 0;
+ int i, got = 0;
+ gfp_t priority;
struct st_buffer *tb;
if (from_initialization)
i = sizeof(struct st_buffer) + (max_sg - 1) * sizeof(struct scatterlist) +
max_sg * sizeof(struct st_buf_fragment);
- tb = kmalloc(i, priority);
+ tb = kzalloc(i, priority);
if (!tb) {
printk(KERN_NOTICE "st: Can't allocate new tape buffer.\n");
return NULL;
}
- memset(tb, 0, i);
- tb->frp_segs = tb->orig_frp_segs = segs;
+ tb->frp_segs = tb->orig_frp_segs = 0;
tb->use_sg = max_sg;
- if (segs > 0)
- tb->b_data = page_address(tb->sg[0].page);
tb->frp = (struct st_buf_fragment *)(&(tb->sg[0]) + max_sg);
- tb->in_use = 1;
tb->dma = need_dma;
tb->buffer_size = got;
/* Try to allocate enough space in the tape buffer */
static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dma)
{
- int segs, nbr, max_segs, b_size, priority, order, got;
+ int segs, nbr, max_segs, b_size, order, got;
+ gfp_t priority;
if (new_size <= STbuffer->buffer_size)
return 1;
priority = GFP_KERNEL | __GFP_NOWARN;
if (need_dma)
priority |= GFP_DMA;
- for (b_size = PAGE_SIZE, order=0;
+ for (b_size = PAGE_SIZE, order=0; order <= 6 &&
b_size < new_size - STbuffer->buffer_size;
order++, b_size *= 2)
; /* empty */
}
STbuffer->frp_segs = STbuffer->orig_frp_segs;
STbuffer->frp_sg_current = 0;
+ STbuffer->sg_segs = 0;
}
break;
}
}
- if (i >= sizeof(parms) / sizeof(struct st_dev_parm))
+ if (i >= ARRAY_SIZE(parms))
printk(KERN_WARNING "st: invalid parameter in '%s'\n",
stp);
stp = strchr(stp, ',');
.read = st_read,
.write = st_write,
.ioctl = st_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = st_compat_ioctl,
+#endif
.open = st_open,
.flush = st_flush,
.release = st_release,
struct st_buffer *buffer;
int i, j, mode, dev_num, error;
char *stp;
- u64 bounce_limit;
if (SDp->type != TYPE_TAPE)
return -ENODEV;
if ((stp = st_incompatible(SDp))) {
- printk(KERN_INFO
- "st: Found incompatible tape at scsi%d, channel %d, id %d, lun %d\n",
- SDp->host->host_no, SDp->channel, SDp->id, SDp->lun);
+ sdev_printk(KERN_INFO, SDp, "Found incompatible tape\n");
printk(KERN_INFO "st: The suggested driver is %s.\n", stp);
return -ENODEV;
}
- i = SDp->host->sg_tablesize;
+ i = min(SDp->request_queue->max_hw_segments,
+ SDp->request_queue->max_phys_segments);
if (st_max_sg_segs < i)
i = st_max_sg_segs;
buffer = new_tape_buffer(1, (SDp->host)->unchecked_isa_dma, i);
goto out_put_disk;
}
- tmp_da = kmalloc(tmp_dev_max * sizeof(struct scsi_tape *), GFP_ATOMIC);
+ tmp_da = kzalloc(tmp_dev_max * sizeof(struct scsi_tape *), GFP_ATOMIC);
if (tmp_da == NULL) {
write_unlock(&st_dev_arr_lock);
printk(KERN_ERR "st: Can't extend device array.\n");
goto out_put_disk;
}
- memset(tmp_da, 0, tmp_dev_max * sizeof(struct scsi_tape *));
if (scsi_tapes != NULL) {
memcpy(tmp_da, scsi_tapes,
st_dev_max * sizeof(struct scsi_tape *));
if (i >= st_dev_max)
panic("scsi_devices corrupt (st)");
- tpnt = kmalloc(sizeof(struct scsi_tape), GFP_ATOMIC);
+ tpnt = kzalloc(sizeof(struct scsi_tape), GFP_ATOMIC);
if (tpnt == NULL) {
write_unlock(&st_dev_arr_lock);
printk(KERN_ERR "st: Can't allocate device descriptor.\n");
goto out_put_disk;
}
- memset(tpnt, 0, sizeof(struct scsi_tape));
+ kref_init(&tpnt->kref);
tpnt->disk = disk;
sprintf(disk->disk_name, "st%d", i);
disk->private_data = &tpnt->driver;
tpnt->tape_type = MT_ISSCSI2;
tpnt->buffer = buffer;
+ tpnt->buffer->last_SRpnt = NULL;
tpnt->inited = 0;
tpnt->dirty = 0;
tpnt->long_timeout = ST_LONG_TIMEOUT;
tpnt->try_dio = try_direct_io && !SDp->host->unchecked_isa_dma;
- bounce_limit = scsi_calculate_bounce_limit(SDp->host) >> PAGE_SHIFT;
- if (bounce_limit > ULONG_MAX)
- bounce_limit = ULONG_MAX;
- tpnt->max_pfn = bounce_limit;
-
for (i = 0; i < ST_NBR_MODES; i++) {
STm = &(tpnt->modes[i]);
STm->defined = 0;
STm->cdevs[j] = cdev;
}
- do_create_class_files(tpnt, dev_num, mode);
+ error = do_create_class_files(tpnt, dev_num, mode);
+ if (error)
+ goto out_free_tape;
}
- for (mode = 0; mode < ST_NBR_MODES; ++mode) {
- /* Make sure that the minor numbers corresponding to the four
- first modes always get the same names */
- i = mode << (4 - ST_NBR_MODE_BITS);
- /* Rewind entry */
- devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 0)),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "%s/mt%s", SDp->devfs_name, st_formats[i]);
- /* No-rewind entry */
- devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 1)),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "%s/mt%sn", SDp->devfs_name, st_formats[i]);
- }
- disk->number = devfs_register_tape(SDp->devfs_name);
-
- printk(KERN_WARNING
- "Attached scsi tape %s at scsi%d, channel %d, id %d, lun %d\n",
- tape_name(tpnt), SDp->host->host_no, SDp->channel, SDp->id, SDp->lun);
- printk(KERN_WARNING "%s: try direct i/o: %s (alignment %d B), max page reachable by HBA %lu\n",
- tape_name(tpnt), tpnt->try_dio ? "yes" : "no",
- queue_dma_alignment(SDp->request_queue) + 1, tpnt->max_pfn);
+ sdev_printk(KERN_NOTICE, SDp,
+ "Attached scsi tape %s\n", tape_name(tpnt));
+ sdev_printk(KERN_INFO, SDp, "%s: try direct i/o: %s (alignment %d B)\n",
+ tape_name(tpnt), tpnt->try_dio ? "yes" : "no",
+ queue_dma_alignment(SDp->request_queue) + 1);
return 0;
if (STm->cdevs[j]) {
if (cdev == STm->cdevs[j])
cdev = NULL;
- class_simple_device_remove(MKDEV(SCSI_TAPE_MAJOR,
- TAPE_MINOR(i, mode, j)));
+ class_device_destroy(st_sysfs_class,
+ MKDEV(SCSI_TAPE_MAJOR,
+ TAPE_MINOR(i, mode, j)));
cdev_del(STm->cdevs[j]);
}
}
write_unlock(&st_dev_arr_lock);
out_put_disk:
put_disk(disk);
- if (tpnt)
- kfree(tpnt);
+ kfree(tpnt);
out_buffer_free:
kfree(buffer);
out:
scsi_tapes[i] = NULL;
st_nr_dev--;
write_unlock(&st_dev_arr_lock);
- devfs_unregister_tape(tpnt->disk->number);
sysfs_remove_link(&tpnt->device->sdev_gendev.kobj,
"tape");
for (mode = 0; mode < ST_NBR_MODES; ++mode) {
- j = mode << (4 - ST_NBR_MODE_BITS);
- devfs_remove("%s/mt%s", SDp->devfs_name, st_formats[j]);
- devfs_remove("%s/mt%sn", SDp->devfs_name, st_formats[j]);
for (j=0; j < 2; j++) {
- class_simple_device_remove(MKDEV(SCSI_TAPE_MAJOR,
- TAPE_MINOR(i, mode, j)));
+ class_device_destroy(st_sysfs_class,
+ MKDEV(SCSI_TAPE_MAJOR,
+ TAPE_MINOR(i, mode, j)));
cdev_del(tpnt->modes[mode].cdevs[j]);
tpnt->modes[mode].cdevs[j] = NULL;
}
}
- tpnt->device = NULL;
- if (tpnt->buffer) {
- tpnt->buffer->orig_frp_segs = 0;
- normalize_buffer(tpnt->buffer);
- kfree(tpnt->buffer);
- }
- put_disk(tpnt->disk);
- kfree(tpnt);
+ mutex_lock(&st_ref_mutex);
+ kref_put(&tpnt->kref, scsi_tape_release);
+ mutex_unlock(&st_ref_mutex);
return 0;
}
}
return 0;
}
-static void st_intr(struct scsi_cmnd *SCpnt)
-{
- scsi_io_completion(SCpnt, (SCpnt->result ? 0: SCpnt->bufflen), 1);
-}
-
-/*
- * st_init_command: only called via the scsi_cmd_ioctl (block SG_IO)
- * interface for REQ_BLOCK_PC commands.
- */
-static int st_init_command(struct scsi_cmnd *SCpnt)
+/**
+ * scsi_tape_release - Called to free the Scsi_Tape structure
+ * @kref: pointer to embedded kref
+ *
+ * st_ref_mutex must be held entering this routine. Because it is
+ * called on last put, you should always use the scsi_tape_get()
+ * scsi_tape_put() helpers which manipulate the semaphore directly
+ * and never do a direct kref_put().
+ **/
+static void scsi_tape_release(struct kref *kref)
{
- struct request *rq;
-
- if (!(SCpnt->request->flags & REQ_BLOCK_PC))
- return 0;
-
- rq = SCpnt->request;
- if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
- return 0;
+ struct scsi_tape *tpnt = to_scsi_tape(kref);
+ struct gendisk *disk = tpnt->disk;
- memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
+ tpnt->device = NULL;
- if (rq_data_dir(rq) == WRITE)
- SCpnt->sc_data_direction = DMA_TO_DEVICE;
- else if (rq->data_len)
- SCpnt->sc_data_direction = DMA_FROM_DEVICE;
- else
- SCpnt->sc_data_direction = DMA_NONE;
+ if (tpnt->buffer) {
+ tpnt->buffer->orig_frp_segs = 0;
+ normalize_buffer(tpnt->buffer);
+ kfree(tpnt->buffer);
+ }
- SCpnt->timeout_per_command = rq->timeout;
- SCpnt->transfersize = rq->data_len;
- SCpnt->done = st_intr;
- return 1;
+ disk->private_data = NULL;
+ put_disk(disk);
+ kfree(tpnt);
+ return;
}
static int __init init_st(void)
{
+ int err;
+
validate_options();
- printk(KERN_INFO
- "st: Version %s, fixed bufsize %d, s/g segs %d\n",
+ printk(KERN_INFO "st: Version %s, fixed bufsize %d, s/g segs %d\n",
verstr, st_fixed_buffer_size, st_max_sg_segs);
- st_sysfs_class = class_simple_create(THIS_MODULE, "scsi_tape");
+ st_sysfs_class = class_create(THIS_MODULE, "scsi_tape");
if (IS_ERR(st_sysfs_class)) {
- st_sysfs_class = NULL;
printk(KERN_ERR "Unable create sysfs class for SCSI tapes\n");
- return 1;
+ return PTR_ERR(st_sysfs_class);
}
- if (!register_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
- ST_MAX_TAPE_ENTRIES, "st")) {
- if (scsi_register_driver(&st_template.gendrv) == 0) {
- do_create_driverfs_files();
- return 0;
- }
- if (st_sysfs_class)
- class_simple_destroy(st_sysfs_class);
- unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
-
- ST_MAX_TAPE_ENTRIES);
+ err = register_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
+ ST_MAX_TAPE_ENTRIES, "st");
+ if (err) {
+ printk(KERN_ERR "Unable to get major %d for SCSI tapes\n",
+ SCSI_TAPE_MAJOR);
+ goto err_class;
}
- printk(KERN_ERR "Unable to get major %d for SCSI tapes\n", SCSI_TAPE_MAJOR);
- return 1;
+ err = scsi_register_driver(&st_template.gendrv);
+ if (err)
+ goto err_chrdev;
+
+ err = do_create_driverfs_files();
+ if (err)
+ goto err_scsidrv;
+
+ return 0;
+
+err_scsidrv:
+ scsi_unregister_driver(&st_template.gendrv);
+err_chrdev:
+ unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
+ ST_MAX_TAPE_ENTRIES);
+err_class:
+ class_destroy(st_sysfs_class);
+ return err;
}
static void __exit exit_st(void)
{
- if (st_sysfs_class)
- class_simple_destroy(st_sysfs_class);
- st_sysfs_class = NULL;
do_remove_driverfs_files();
scsi_unregister_driver(&st_template.gendrv);
unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
ST_MAX_TAPE_ENTRIES);
+ class_destroy(st_sysfs_class);
kfree(scsi_tapes);
printk(KERN_INFO "st: Unloaded.\n");
}
}
static DRIVER_ATTR(version, S_IRUGO, st_version_show, NULL);
-static void do_create_driverfs_files(void)
+static int do_create_driverfs_files(void)
{
struct device_driver *driverfs = &st_template.gendrv;
+ int err;
+
+ err = driver_create_file(driverfs, &driver_attr_try_direct_io);
+ if (err)
+ return err;
+ err = driver_create_file(driverfs, &driver_attr_fixed_buffer_size);
+ if (err)
+ goto err_try_direct_io;
+ err = driver_create_file(driverfs, &driver_attr_max_sg_segs);
+ if (err)
+ goto err_attr_fixed_buf;
+ err = driver_create_file(driverfs, &driver_attr_version);
+ if (err)
+ goto err_attr_max_sg;
- driver_create_file(driverfs, &driver_attr_try_direct_io);
- driver_create_file(driverfs, &driver_attr_fixed_buffer_size);
- driver_create_file(driverfs, &driver_attr_max_sg_segs);
- driver_create_file(driverfs, &driver_attr_version);
+ return 0;
+
+err_attr_max_sg:
+ driver_remove_file(driverfs, &driver_attr_max_sg_segs);
+err_attr_fixed_buf:
+ driver_remove_file(driverfs, &driver_attr_fixed_buffer_size);
+err_try_direct_io:
+ driver_remove_file(driverfs, &driver_attr_try_direct_io);
+ return err;
}
static void do_remove_driverfs_files(void)
CLASS_DEVICE_ATTR(default_compression, S_IRUGO, st_defcompression_show, NULL);
-static void do_create_class_files(struct scsi_tape *STp, int dev_num, int mode)
+static int do_create_class_files(struct scsi_tape *STp, int dev_num, int mode)
{
int i, rew, error;
char name[10];
struct class_device *st_class_member;
- if (!st_sysfs_class)
- return;
-
for (rew=0; rew < 2; rew++) {
/* Make sure that the minor numbers corresponding to the four
first modes always get the same names */
snprintf(name, 10, "%s%s%s", rew ? "n" : "",
STp->disk->disk_name, st_formats[i]);
st_class_member =
- class_simple_device_add(st_sysfs_class,
- MKDEV(SCSI_TAPE_MAJOR,
- TAPE_MINOR(dev_num, mode, rew)),
- &STp->device->sdev_gendev, "%s", name);
+ class_device_create(st_sysfs_class, NULL,
+ MKDEV(SCSI_TAPE_MAJOR,
+ TAPE_MINOR(dev_num, mode, rew)),
+ &STp->device->sdev_gendev, "%s", name);
if (IS_ERR(st_class_member)) {
- printk(KERN_WARNING "st%d: class_simple_device_add failed\n",
+ printk(KERN_WARNING "st%d: class_device_create failed\n",
dev_num);
+ error = PTR_ERR(st_class_member);
goto out;
}
class_set_devdata(st_class_member, &STp->modes[mode]);
- class_device_create_file(st_class_member,
- &class_device_attr_defined);
- class_device_create_file(st_class_member,
- &class_device_attr_default_blksize);
- class_device_create_file(st_class_member,
- &class_device_attr_default_density);
- class_device_create_file(st_class_member,
- &class_device_attr_default_compression);
+ error = class_device_create_file(st_class_member,
+ &class_device_attr_defined);
+ if (error) goto out;
+ error = class_device_create_file(st_class_member,
+ &class_device_attr_default_blksize);
+ if (error) goto out;
+ error = class_device_create_file(st_class_member,
+ &class_device_attr_default_density);
+ if (error) goto out;
+ error = class_device_create_file(st_class_member,
+ &class_device_attr_default_compression);
+ if (error) goto out;
+
if (mode == 0 && rew == 0) {
error = sysfs_create_link(&STp->device->sdev_gendev.kobj,
&st_class_member->kobj,
printk(KERN_ERR
"st%d: Can't create sysfs link from SCSI device.\n",
dev_num);
+ goto out;
}
}
}
- out:
- return;
-}
-
-
-/* Pin down user pages and put them into a scatter gather list. Returns <= 0 if
- - mapping of all pages not successful
- - any page is above max_pfn
- (i.e., either completely successful or fails)
-*/
-static int st_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages,
- unsigned long uaddr, size_t count, int rw,
- unsigned long max_pfn)
-{
- int i, nr_pages;
-
- nr_pages = sgl_map_user_pages(sgl, max_pages, uaddr, count, rw);
- if (nr_pages <= 0)
- return nr_pages;
-
- for (i=0; i < nr_pages; i++) {
- if (page_to_pfn(sgl[i].page) > max_pfn)
- goto out_unmap;
- }
- return nr_pages;
- out_unmap:
- sgl_unmap_user_pages(sgl, nr_pages, 0);
return 0;
-}
+out:
+ return error;
+}
/* The following functions may be useful for a larger audience. */
static int sgl_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages,
unsigned long uaddr, size_t count, int rw)
{
+ unsigned long end = (uaddr + count + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ unsigned long start = uaddr >> PAGE_SHIFT;
+ const int nr_pages = end - start;
int res, i, j;
- unsigned int nr_pages;
struct page **pages;
- nr_pages = ((uaddr & ~PAGE_MASK) + count + ~PAGE_MASK) >> PAGE_SHIFT;
-
/* User attempted Overflow! */
if ((uaddr + count) < uaddr)
return -EINVAL;
if (res > 0) {
for (j=0; j < res; j++)
page_cache_release(pages[j]);
+ res = 0;
}
kfree(pages);
return res;
int i;
for (i=0; i < nr_pages; i++) {
- if (dirtied && !PageReserved(sgl[i].page))
- SetPageDirty(sgl[i].page);
+ struct page *page = sgl[i].page;
+
+ if (dirtied)
+ SetPageDirty(page);
/* FIXME: cache flush missing for rw==READ
* FIXME: call the correct reference counting function
*/
- page_cache_release(sgl[i].page);
+ page_cache_release(page);
}
return 0;
git://git.onelab.eu / linux-2.6.git / blobdiff