Besides CD-ROMs, three more device types are interesting for SG_IO: media changers, tapes and of course disks.
Starting with this patch, we will whitelist a few more commands for these devices. For media changers, enable "INITIALIZE ELEMENT STATUS" and "REQUEST VOLUME ELEMENT ADDRESS". A few changer-specific commands were already enabled by chance because they overlapped commands that are valid for other classes: "EXCHANGE MEDIUM", "SEND VOLUME TAG", "INITIALIZE ELEMENT STATUS WITH RANGE". In addition, some changers are still using an old pre-standard command for "INITIALIZE ELEMENT STATUS WITH RANGE", which is enabled as well. This makes media changers usable by unprivileged users that have access to the device node. Cc: "James E.J. Bottomley" <[email protected]> Cc: [email protected] Cc: Jens Axboe <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]> --- block/scsi_ioctl.c | 27 ++++++++++++++++++++++----- 1 file changed, 22 insertions(+), 5 deletions(-) diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index b11ad49..f9e719e 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -142,9 +142,9 @@ static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter) sgio_bitmap_set(0x03, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* REQUEST SENSE */ sgio_bitmap_set(0x12, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* INQUIRY */ sgio_bitmap_set(0x1A, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* MODE SENSE(6) */ - sgio_bitmap_set(0x1B, D|T| W|R|O|M|A| B|K|V|F , read); /* START STOP UNIT */ + sgio_bitmap_set(0x1B, D|T| W|R|O| A| B|K|V|F , read); /* START STOP UNIT */ sgio_bitmap_set(0x1C, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* RECEIVE DIAGNOSTIC RESULTS */ - sgio_bitmap_set(0x2B, D|T| W|R|O|M| K , read); /* SEEK(10) */ + sgio_bitmap_set(0x2B, D|T| W|R|O| K , read); /* SEEK(10) */ sgio_bitmap_set(0x3C, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* READ BUFFER */ sgio_bitmap_set(0x4D, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* LOG SENSE */ sgio_bitmap_set(0x5A, D|T|L|P|W|R|O|M|A|E|B|K|V|F|C, read); /* MODE SENSE(10) */ @@ -165,7 +165,7 @@ static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter) sgio_bitmap_set(0x25, D| W|R|O| B|K , read); /* READ CAPACITY(10) */ sgio_bitmap_set(0x28, D| W|R|O| B|K , read); /* READ(10) */ sgio_bitmap_set(0x2F, D| W|R|O , read); /* VERIFY(10) */ - sgio_bitmap_set(0x37, D| O|M , read); /* READ DEFECT DATA(10) */ + sgio_bitmap_set(0x37, D| O , read); /* READ DEFECT DATA(10) */ sgio_bitmap_set(0x3E, D| W| O , read); /* READ LONG(10) */ sgio_bitmap_set(0x88, D|T| W| O| B , read); /* READ(16) */ sgio_bitmap_set(0x8F, D|T| W| O| B , read); /* VERIFY(16) */ @@ -197,6 +197,23 @@ static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter) sgio_bitmap_set(0x14, L , write); /* RECOVER BUFFERED DATA */ sgio_bitmap_set(0x1B, L , write); /* STOP PRINT */ + /* media changer */ + + sgio_bitmap_set(0x07, M , read); /* INITIALIZE ELEMENT STATUS */ + sgio_bitmap_set(0x1B, M , read); /* OPEN/CLOSE IMPORT/EXPORT ELEMENT */ + sgio_bitmap_set(0x2B, M , read); /* POSITION TO ELEMENT */ + sgio_bitmap_set(0x37, M , read); /* INITIALIZE ELEMENT STATUS WITH RANGE */ + sgio_bitmap_set(0xB5, M , read); /* REQUEST VOLUME ELEMENT ADDRESS */ + + sgio_bitmap_set(0xA6, M , write); /* EXCHANGE MEDIUM */ + sgio_bitmap_set(0xB6, M , write); /* SEND VOLUME TAG */ + + /* + * The standard says that INITIALIZE ELEMENT STATUS WITH RANGE was + * mapped to 0xE7 (vendor-specific) before being standardized. + */ + sgio_bitmap_set(0xE7, M , read); + /* MMC */ sgio_bitmap_set(0x23, R , read); /* READ FORMAT CAPACITIES */ @@ -230,9 +247,9 @@ static void blk_set_cmd_filter_defaults(struct blk_cmd_filter *filter) sgio_bitmap_set(0xA1, D| R| B , write); /* BLANK / ATA PASS-THROUGH(12) */ sgio_bitmap_set(0xA2, R , write); /* SEND EVENT */ sgio_bitmap_set(0xA3, R , write); /* SEND KEY */ - sgio_bitmap_set(0xA6, R| M , write); /* LOAD/UNLOAD C/DVD */ + sgio_bitmap_set(0xA6, R , write); /* LOAD/UNLOAD C/DVD */ sgio_bitmap_set(0xA7, R , write); /* SET READ AHEAD */ - sgio_bitmap_set(0xB6, R| M , write); /* SET STREAMING */ + sgio_bitmap_set(0xB6, R , write); /* SET STREAMING */ sgio_bitmap_set(0xBB, R , write); /* SET CD SPEED */ sgio_bitmap_set(0xBF, R , write); /* SEND DVD STRUCTURE */ -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
