#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_cmnd.h>
+struct blk_cmd_filter {
+ unsigned long read_ok[BLK_SCSI_CMD_PER_LONG];
+ unsigned long write_ok[BLK_SCSI_CMD_PER_LONG];
+} blk_default_cmd_filter;
+
/* Command group 3 is reserved and should never be used. */
-const unsigned char scsi_command_size[8] =
+const unsigned char scsi_command_size_tbl[8] =
{
6, 10, 10, 12,
16, 12, 10, 10
};
-
-EXPORT_SYMBOL(scsi_command_size);
+EXPORT_SYMBOL(scsi_command_size_tbl);
#include <scsi/sg.h>
static int sg_get_timeout(struct request_queue *q)
{
- return q->sg_timeout / (HZ / USER_HZ);
+ return jiffies_to_clock_t(q->sg_timeout);
}
static int sg_set_timeout(struct request_queue *q, int __user *p)
int timeout, err = get_user(timeout, p);
if (!err)
- q->sg_timeout = timeout * (HZ / USER_HZ);
+ q->sg_timeout = clock_t_to_jiffies(timeout);
return err;
}
static int sg_get_reserved_size(struct request_queue *q, int __user *p)
{
- unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
+ unsigned val = min(q->sg_reserved_size, queue_max_sectors(q) << 9);
return put_user(val, p);
}
if (size < 0)
return -EINVAL;
- if (size > (q->max_sectors << 9))
- size = q->max_sectors << 9;
+ if (size > (queue_max_sectors(q) << 9))
+ size = queue_max_sectors(q) << 9;
q->sg_reserved_size = size;
return 0;
return put_user(1, p);
}
-#define CMD_READ_SAFE 0x01
-#define CMD_WRITE_SAFE 0x02
-#define CMD_WARNED 0x04
-#define safe_for_read(cmd) [cmd] = CMD_READ_SAFE
-#define safe_for_write(cmd) [cmd] = CMD_WRITE_SAFE
+static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter)
+{
+ /* Basic read-only commands */
+ __set_bit(TEST_UNIT_READY, filter->read_ok);
+ __set_bit(REQUEST_SENSE, filter->read_ok);
+ __set_bit(READ_6, filter->read_ok);
+ __set_bit(READ_10, filter->read_ok);
+ __set_bit(READ_12, filter->read_ok);
+ __set_bit(READ_16, filter->read_ok);
+ __set_bit(READ_BUFFER, filter->read_ok);
+ __set_bit(READ_DEFECT_DATA, filter->read_ok);
+ __set_bit(READ_CAPACITY, filter->read_ok);
+ __set_bit(READ_LONG, filter->read_ok);
+ __set_bit(INQUIRY, filter->read_ok);
+ __set_bit(MODE_SENSE, filter->read_ok);
+ __set_bit(MODE_SENSE_10, filter->read_ok);
+ __set_bit(LOG_SENSE, filter->read_ok);
+ __set_bit(START_STOP, filter->read_ok);
+ __set_bit(GPCMD_VERIFY_10, filter->read_ok);
+ __set_bit(VERIFY_16, filter->read_ok);
+ __set_bit(REPORT_LUNS, filter->read_ok);
+ __set_bit(SERVICE_ACTION_IN, filter->read_ok);
+ __set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
+ __set_bit(MAINTENANCE_IN, filter->read_ok);
+ __set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
+
+ /* Audio CD commands */
+ __set_bit(GPCMD_PLAY_CD, filter->read_ok);
+ __set_bit(GPCMD_PLAY_AUDIO_10, filter->read_ok);
+ __set_bit(GPCMD_PLAY_AUDIO_MSF, filter->read_ok);
+ __set_bit(GPCMD_PLAY_AUDIO_TI, filter->read_ok);
+ __set_bit(GPCMD_PAUSE_RESUME, filter->read_ok);
+
+ /* CD/DVD data reading */
+ __set_bit(GPCMD_READ_CD, filter->read_ok);
+ __set_bit(GPCMD_READ_CD_MSF, filter->read_ok);
+ __set_bit(GPCMD_READ_DISC_INFO, filter->read_ok);
+ __set_bit(GPCMD_READ_CDVD_CAPACITY, filter->read_ok);
+ __set_bit(GPCMD_READ_DVD_STRUCTURE, filter->read_ok);
+ __set_bit(GPCMD_READ_HEADER, filter->read_ok);
+ __set_bit(GPCMD_READ_TRACK_RZONE_INFO, filter->read_ok);
+ __set_bit(GPCMD_READ_SUBCHANNEL, filter->read_ok);
+ __set_bit(GPCMD_READ_TOC_PMA_ATIP, filter->read_ok);
+ __set_bit(GPCMD_REPORT_KEY, filter->read_ok);
+ __set_bit(GPCMD_SCAN, filter->read_ok);
+ __set_bit(GPCMD_GET_CONFIGURATION, filter->read_ok);
+ __set_bit(GPCMD_READ_FORMAT_CAPACITIES, filter->read_ok);
+ __set_bit(GPCMD_GET_EVENT_STATUS_NOTIFICATION, filter->read_ok);
+ __set_bit(GPCMD_GET_PERFORMANCE, filter->read_ok);
+ __set_bit(GPCMD_SEEK, filter->read_ok);
+ __set_bit(GPCMD_STOP_PLAY_SCAN, filter->read_ok);
+
+ /* Basic writing commands */
+ __set_bit(WRITE_6, filter->write_ok);
+ __set_bit(WRITE_10, filter->write_ok);
+ __set_bit(WRITE_VERIFY, filter->write_ok);
+ __set_bit(WRITE_12, filter->write_ok);
+ __set_bit(WRITE_VERIFY_12, filter->write_ok);
+ __set_bit(WRITE_16, filter->write_ok);
+ __set_bit(WRITE_LONG, filter->write_ok);
+ __set_bit(WRITE_LONG_2, filter->write_ok);
+ __set_bit(ERASE, filter->write_ok);
+ __set_bit(GPCMD_MODE_SELECT_10, filter->write_ok);
+ __set_bit(MODE_SELECT, filter->write_ok);
+ __set_bit(LOG_SELECT, filter->write_ok);
+ __set_bit(GPCMD_BLANK, filter->write_ok);
+ __set_bit(GPCMD_CLOSE_TRACK, filter->write_ok);
+ __set_bit(GPCMD_FLUSH_CACHE, filter->write_ok);
+ __set_bit(GPCMD_FORMAT_UNIT, filter->write_ok);
+ __set_bit(GPCMD_REPAIR_RZONE_TRACK, filter->write_ok);
+ __set_bit(GPCMD_RESERVE_RZONE_TRACK, filter->write_ok);
+ __set_bit(GPCMD_SEND_DVD_STRUCTURE, filter->write_ok);
+ __set_bit(GPCMD_SEND_EVENT, filter->write_ok);
+ __set_bit(GPCMD_SEND_KEY, filter->write_ok);
+ __set_bit(GPCMD_SEND_OPC, filter->write_ok);
+ __set_bit(GPCMD_SEND_CUE_SHEET, filter->write_ok);
+ __set_bit(GPCMD_SET_SPEED, filter->write_ok);
+ __set_bit(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, filter->write_ok);
+ __set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
+ __set_bit(GPCMD_SET_STREAMING, filter->write_ok);
+ __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
+}
-int blk_verify_command(unsigned char *cmd, int has_write_perm)
+int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm)
{
- static unsigned char cmd_type[256] = {
-
- /* Basic read-only commands */
- safe_for_read(TEST_UNIT_READY),
- safe_for_read(REQUEST_SENSE),
- safe_for_read(READ_6),
- safe_for_read(READ_10),
- safe_for_read(READ_12),
- safe_for_read(READ_16),
- safe_for_read(READ_BUFFER),
- safe_for_read(READ_DEFECT_DATA),
- safe_for_read(READ_LONG),
- safe_for_read(INQUIRY),
- safe_for_read(MODE_SENSE),
- safe_for_read(MODE_SENSE_10),
- safe_for_read(LOG_SENSE),
- safe_for_read(START_STOP),
- safe_for_read(GPCMD_VERIFY_10),
- safe_for_read(VERIFY_16),
-
- /* Audio CD commands */
- safe_for_read(GPCMD_PLAY_CD),
- safe_for_read(GPCMD_PLAY_AUDIO_10),
- safe_for_read(GPCMD_PLAY_AUDIO_MSF),
- safe_for_read(GPCMD_PLAY_AUDIO_TI),
- safe_for_read(GPCMD_PAUSE_RESUME),
-
- /* CD/DVD data reading */
- safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
- safe_for_read(GPCMD_READ_CD),
- safe_for_read(GPCMD_READ_CD_MSF),
- safe_for_read(GPCMD_READ_DISC_INFO),
- safe_for_read(GPCMD_READ_CDVD_CAPACITY),
- safe_for_read(GPCMD_READ_DVD_STRUCTURE),
- safe_for_read(GPCMD_READ_HEADER),
- safe_for_read(GPCMD_READ_TRACK_RZONE_INFO),
- safe_for_read(GPCMD_READ_SUBCHANNEL),
- safe_for_read(GPCMD_READ_TOC_PMA_ATIP),
- safe_for_read(GPCMD_REPORT_KEY),
- safe_for_read(GPCMD_SCAN),
- safe_for_read(GPCMD_GET_CONFIGURATION),
- safe_for_read(GPCMD_READ_FORMAT_CAPACITIES),
- safe_for_read(GPCMD_GET_EVENT_STATUS_NOTIFICATION),
- safe_for_read(GPCMD_GET_PERFORMANCE),
- safe_for_read(GPCMD_SEEK),
- safe_for_read(GPCMD_STOP_PLAY_SCAN),
-
- /* Basic writing commands */
- safe_for_write(WRITE_6),
- safe_for_write(WRITE_10),
- safe_for_write(WRITE_VERIFY),
- safe_for_write(WRITE_12),
- safe_for_write(WRITE_VERIFY_12),
- safe_for_write(WRITE_16),
- safe_for_write(WRITE_LONG),
- safe_for_write(WRITE_LONG_2),
- safe_for_write(ERASE),
- safe_for_write(GPCMD_MODE_SELECT_10),
- safe_for_write(MODE_SELECT),
- safe_for_write(LOG_SELECT),
- safe_for_write(GPCMD_BLANK),
- safe_for_write(GPCMD_CLOSE_TRACK),
- safe_for_write(GPCMD_FLUSH_CACHE),
- safe_for_write(GPCMD_FORMAT_UNIT),
- safe_for_write(GPCMD_REPAIR_RZONE_TRACK),
- safe_for_write(GPCMD_RESERVE_RZONE_TRACK),
- safe_for_write(GPCMD_SEND_DVD_STRUCTURE),
- safe_for_write(GPCMD_SEND_EVENT),
- safe_for_write(GPCMD_SEND_KEY),
- safe_for_write(GPCMD_SEND_OPC),
- safe_for_write(GPCMD_SEND_CUE_SHEET),
- safe_for_write(GPCMD_SET_SPEED),
- safe_for_write(GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL),
- safe_for_write(GPCMD_LOAD_UNLOAD),
- safe_for_write(GPCMD_SET_STREAMING),
- };
- unsigned char type = cmd_type[cmd[0]];
+ struct blk_cmd_filter *filter = &blk_default_cmd_filter;
- /* Anybody who can open the device can do a read-safe command */
- if (type & CMD_READ_SAFE)
+ /* root can do any command. */
+ if (capable(CAP_SYS_RAWIO))
return 0;
- /* Write-safe commands just require a writable open.. */
- if ((type & CMD_WRITE_SAFE) && has_write_perm)
- return 0;
+ /* if there's no filter set, assume we're filtering everything out */
+ if (!filter)
+ return -EPERM;
- /* And root can do any command.. */
- if (capable(CAP_SYS_RAWIO))
+ /* Anybody who can open the device can do a read-safe command */
+ if (test_bit(cmd[0], filter->read_ok))
return 0;
- if (!type) {
- cmd_type[cmd[0]] = CMD_WARNED;
- printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
- }
+ /* Write-safe commands require a writable open */
+ if (test_bit(cmd[0], filter->write_ok) && has_write_perm)
+ return 0;
- /* Otherwise fail it with an "Operation not permitted" */
return -EPERM;
}
-EXPORT_SYMBOL_GPL(blk_verify_command);
+EXPORT_SYMBOL(blk_verify_command);
static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
- struct sg_io_hdr *hdr, int has_write_perm)
+ struct sg_io_hdr *hdr, fmode_t mode)
{
if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
return -EFAULT;
- if (blk_verify_command(rq->cmd, has_write_perm))
+ if (blk_verify_command(rq->cmd, mode & FMODE_WRITE))
return -EPERM;
/*
rq->timeout = q->sg_timeout;
if (!rq->timeout)
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
+ if (rq->timeout < BLK_MIN_SG_TIMEOUT)
+ rq->timeout = BLK_MIN_SG_TIMEOUT;
return 0;
}
-/*
- * unmap a request that was previously mapped to this sg_io_hdr. handles
- * both sg and non-sg sg_io_hdr.
- */
-static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
-{
- blk_rq_unmap_user(rq->bio);
- blk_put_request(rq);
- return 0;
-}
-
static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
struct bio *bio)
{
hdr->info = 0;
if (hdr->masked_status || hdr->host_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
- hdr->resid = rq->data_len;
+ hdr->resid = rq->resid_len;
hdr->sb_len_wr = 0;
if (rq->sense_len && hdr->sbp) {
ret = -EFAULT;
}
- rq->bio = bio;
- r = blk_unmap_sghdr_rq(rq, hdr);
- if (ret)
- r = ret;
+ r = blk_rq_unmap_user(bio);
+ if (!ret)
+ ret = r;
+ blk_put_request(rq);
- return r;
+ return ret;
}
-static int sg_io(struct file *file, struct request_queue *q,
- struct gendisk *bd_disk, struct sg_io_hdr *hdr)
+static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
+ struct sg_io_hdr *hdr, fmode_t mode)
{
unsigned long start_time;
- int writing = 0, ret = 0, has_write_perm = 0;
+ int writing = 0, ret = 0;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct bio *bio;
if (hdr->cmd_len > BLK_MAX_CDB)
return -EINVAL;
- if (hdr->dxfer_len > (q->max_hw_sectors << 9))
+ if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
return -EIO;
if (hdr->dxfer_len)
if (!rq)
return -ENOMEM;
- if (file)
- has_write_perm = file->f_mode & FMODE_WRITE;
-
- if (blk_fill_sghdr_rq(q, rq, hdr, has_write_perm)) {
+ if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
blk_put_request(rq);
return -EFAULT;
}
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
+ size_t iov_data_len;
struct sg_iovec *iov;
iov = kmalloc(size, GFP_KERNEL);
goto out;
}
- ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
- hdr->dxfer_len);
+ /* SG_IO howto says that the shorter of the two wins */
+ iov_data_len = iov_length((struct iovec *)iov,
+ hdr->iovec_count);
+ if (hdr->dxfer_len < iov_data_len) {
+ hdr->iovec_count = iov_shorten((struct iovec *)iov,
+ hdr->iovec_count,
+ hdr->dxfer_len);
+ iov_data_len = hdr->dxfer_len;
+ }
+
+ ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count,
+ iov_data_len, GFP_KERNEL);
kfree(iov);
} else if (hdr->dxfer_len)
- ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
+ ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
+ GFP_KERNEL);
if (ret)
goto out;
* bytes in one int) where the lowest byte is the SCSI status.
*/
#define OMAX_SB_LEN 16 /* For backward compatibility */
-int sg_scsi_ioctl(struct file *file, struct request_queue *q,
- struct gendisk *disk, struct scsi_ioctl_command __user *sic)
+int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
+ struct scsi_ioctl_command __user *sic)
{
struct request *rq;
int err;
if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
goto error;
- err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
+ err = blk_verify_command(rq->cmd, mode & FMODE_WRITE);
if (err)
goto error;
rq = blk_get_request(q, WRITE, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_BLOCK_PC;
- rq->data = NULL;
- rq->data_len = 0;
- rq->extra_len = 0;
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
rq->cmd[0] = cmd;
rq->cmd[4] = data;
return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
}
-int scsi_cmd_ioctl(struct file *file, struct request_queue *q,
- struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
+int scsi_cmd_ioctl(struct request_queue *q, struct gendisk *bd_disk, fmode_t mode,
+ unsigned int cmd, void __user *arg)
{
int err;
err = -EFAULT;
if (copy_from_user(&hdr, arg, sizeof(hdr)))
break;
- err = sg_io(file, q, bd_disk, &hdr);
+ err = sg_io(q, bd_disk, &hdr, mode);
if (err == -EFAULT)
break;
hdr.sbp = cgc.sense;
if (hdr.sbp)
hdr.mx_sb_len = sizeof(struct request_sense);
- hdr.timeout = cgc.timeout;
+ hdr.timeout = jiffies_to_msecs(cgc.timeout);
hdr.cmdp = ((struct cdrom_generic_command __user*) arg)->cmd;
hdr.cmd_len = sizeof(cgc.cmd);
- err = sg_io(file, q, bd_disk, &hdr);
+ err = sg_io(q, bd_disk, &hdr, mode);
if (err == -EFAULT)
break;
if (!arg)
break;
- err = sg_scsi_ioctl(file, q, bd_disk, arg);
+ err = sg_scsi_ioctl(q, bd_disk, mode, arg);
break;
case CDROMCLOSETRAY:
err = blk_send_start_stop(q, bd_disk, 0x03);
blk_put_queue(q);
return err;
}
-
EXPORT_SYMBOL(scsi_cmd_ioctl);
+
+int __init blk_scsi_ioctl_init(void)
+{
+ blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
+ return 0;
+}
+fs_initcall(blk_scsi_ioctl_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff