X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=block%2Fscsi_ioctl.c;h=c5b9bcfc0a6d9c3629fa1aa1492fbcba1cb42e32;hb=d26acd92fa990764b72608a68224f46fac377032;hp=a2c3a936ebf98e1481346e76a7ef268b803c76ea;hpb=609eb39c8d8a8d2930780428f6cbe2f63eb84734;p=linux-2.6 diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index a2c3a936eb..ec4b7f2346 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -33,13 +33,12 @@ #include /* 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 @@ -106,122 +105,96 @@ static int sg_emulated_host(struct request_queue *q, int __user *p) 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 - -int blk_verify_command(unsigned char *cmd, int has_write_perm) +void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter) { - 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]]; - - /* Anybody who can open the device can do a read-safe command */ - if (type & CMD_READ_SAFE) - return 0; - - /* Write-safe commands just require a writable open.. */ - if ((type & CMD_WRITE_SAFE) && has_write_perm) - return 0; - - /* And root can do any command.. */ - if (capable(CAP_SYS_RAWIO)) - return 0; - - if (!type) { - cmd_type[cmd[0]] = CMD_WARNED; - printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]); - } - - /* Otherwise fail it with an "Operation not permitted" */ - return -EPERM; + /* 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); } -EXPORT_SYMBOL_GPL(blk_verify_command); +EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults); 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, struct file *file) { - memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ - 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(&q->cmd_filter, rq->cmd, + file->f_mode & FMODE_WRITE)) return -EPERM; /* @@ -290,7 +263,7 @@ static int sg_io(struct file *file, struct request_queue *q, struct gendisk *bd_disk, struct sg_io_hdr *hdr) { 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; @@ -319,10 +292,7 @@ static int sg_io(struct file *file, struct request_queue *q, 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, file)) { blk_put_request(rq); return -EFAULT; } @@ -412,7 +382,7 @@ int sg_scsi_ioctl(struct file *file, struct request_queue *q, struct gendisk *disk, struct scsi_ioctl_command __user *sic) { struct request *rq; - int err; + int err, write_perm = 0; unsigned int in_len, out_len, bytes, opcode, cmdlen; char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE]; @@ -454,7 +424,11 @@ int sg_scsi_ioctl(struct file *file, struct request_queue *q, 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); + /* scsi_ioctl passes NULL */ + if (file && (file->f_mode & FMODE_WRITE)) + write_perm = 1; + + err = blk_verify_command(&q->cmd_filter, rq->cmd, write_perm); if (err) goto error; @@ -531,7 +505,6 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk, rq->data_len = 0; rq->extra_len = 0; rq->timeout = BLK_DEFAULT_SG_TIMEOUT; - memset(rq->cmd, 0, sizeof(rq->cmd)); rq->cmd[0] = cmd; rq->cmd[4] = data; rq->cmd_len = 6; @@ -633,7 +606,7 @@ int scsi_cmd_ioctl(struct file *file, struct request_queue *q, 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);