block: set disk->node_id before it's being used
[linux-2.6.git] / block / scsi_ioctl.c
index 88fd008..5963cf9 100644 (file)
 #include <scsi/scsi_cmnd.h>
 
 /* 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>
 
@@ -49,22 +48,22 @@ static int sg_get_version(int __user *p)
        return put_user(sg_version_num, p);
 }
 
-static int scsi_get_idlun(request_queue_t *q, int __user *p)
+static int scsi_get_idlun(struct request_queue *q, int __user *p)
 {
        return put_user(0, p);
 }
 
-static int scsi_get_bus(request_queue_t *q, int __user *p)
+static int scsi_get_bus(struct request_queue *q, int __user *p)
 {
        return put_user(0, p);
 }
 
-static int sg_get_timeout(request_queue_t *q)
+static int sg_get_timeout(struct request_queue *q)
 {
        return q->sg_timeout / (HZ / USER_HZ);
 }
 
-static int sg_set_timeout(request_queue_t *q, int __user *p)
+static int sg_set_timeout(struct request_queue *q, int __user *p)
 {
        int timeout, err = get_user(timeout, p);
 
@@ -74,14 +73,14 @@ static int sg_set_timeout(request_queue_t *q, int __user *p)
        return err;
 }
 
-static int sg_get_reserved_size(request_queue_t *q, int __user *p)
+static int sg_get_reserved_size(struct request_queue *q, int __user *p)
 {
        unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
 
        return put_user(val, p);
 }
 
-static int sg_set_reserved_size(request_queue_t *q, int __user *p)
+static int sg_set_reserved_size(struct request_queue *q, int __user *p)
 {
        int size, err = get_user(size, p);
 
@@ -101,126 +100,101 @@ static int sg_set_reserved_size(request_queue_t *q, int __user *p)
  * will always return that we are ATAPI even for a real SCSI drive, I'm not
  * so sure this is worth doing anything about (why would you care??)
  */
-static int sg_emulated_host(request_queue_t *q, int __user *p)
+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
-
-static int 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);
+       __set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
 }
+EXPORT_SYMBOL_GPL(blk_set_cmd_filter_defaults);
 
-int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
-                     struct sg_io_hdr *hdr, int has_write_perm)
+static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
+                            struct sg_io_hdr *hdr, fmode_t mode)
 {
-       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 (verify_command(rq->cmd, has_write_perm))
+       if (blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE))
                return -EPERM;
 
        /*
@@ -229,7 +203,7 @@ int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
        rq->cmd_len = hdr->cmd_len;
        rq->cmd_type = REQ_TYPE_BLOCK_PC;
 
-       rq->timeout = (hdr->timeout * HZ) / 1000;
+       rq->timeout = msecs_to_jiffies(hdr->timeout);
        if (!rq->timeout)
                rq->timeout = q->sg_timeout;
        if (!rq->timeout)
@@ -237,32 +211,20 @@ int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
 
        return 0;
 }
-EXPORT_SYMBOL_GPL(blk_fill_sghdr_rq);
 
 /*
  * unmap a request that was previously mapped to this sg_io_hdr. handles
  * both sg and non-sg sg_io_hdr.
  */
-int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
+static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
 {
-       struct bio *bio = rq->bio;
-
-       /*
-        * also releases request
-        */
-       if (!hdr->iovec_count)
-               return blk_rq_unmap_user(bio, hdr->dxfer_len);
-
-       rq_for_each_bio(bio, rq)
-               bio_unmap_user(bio);
-
+       blk_rq_unmap_user(rq->bio);
        blk_put_request(rq);
        return 0;
 }
-EXPORT_SYMBOL_GPL(blk_unmap_sghdr_rq);
 
-int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
-                         struct bio *bio)
+static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
+                                struct bio *bio)
 {
        int r, ret = 0;
 
@@ -296,13 +258,12 @@ int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
 
        return r;
 }
-EXPORT_SYMBOL_GPL(blk_complete_sghdr_rq);
 
-static int sg_io(struct file *file, request_queue_t *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;
@@ -331,11 +292,7 @@ static int sg_io(struct file *file, request_queue_t *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)) {
-               blk_rq_unmap_user(bio, hdr->dxfer_len);
+       if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
                blk_put_request(rq);
                return -EFAULT;
        }
@@ -356,11 +313,12 @@ static int sg_io(struct file *file, request_queue_t *q,
                        goto out;
                }
 
-               ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
-                                         hdr->dxfer_len);
+               ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count,
+                                         hdr->dxfer_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;
@@ -379,7 +337,7 @@ static int sg_io(struct file *file, request_queue_t *q,
         */
        blk_execute_rq(q, bd_disk, rq, 0);
 
-       hdr->duration = ((jiffies - start_time) * 1000) / HZ;
+       hdr->duration = jiffies_to_msecs(jiffies - start_time);
 
        return blk_complete_sghdr_rq(rq, hdr, bio);
 out:
@@ -421,8 +379,8 @@ 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;
@@ -446,11 +404,10 @@ int sg_scsi_ioctl(struct file *file, struct request_queue *q,
 
        bytes = max(in_len, out_len);
        if (bytes) {
-               buffer = kmalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
+               buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
                if (!buffer)
                        return -ENOMEM;
 
-               memset(buffer, 0, bytes);
        }
 
        rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
@@ -468,7 +425,7 @@ 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 = verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
+       err = blk_verify_command(&q->cmd_filter, rq->cmd, mode & FMODE_WRITE);
        if (err)
                goto error;
 
@@ -533,7 +490,8 @@ error:
 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
 
 /* Send basic block requests */
-static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
+static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
+                             int cmd, int data)
 {
        struct request *rq;
        int err;
@@ -542,8 +500,8 @@ static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int c
        rq->cmd_type = REQ_TYPE_BLOCK_PC;
        rq->data = NULL;
        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;
@@ -553,21 +511,18 @@ static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int c
        return err;
 }
 
-static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
+static inline int blk_send_start_stop(struct request_queue *q,
+                                     struct gendisk *bd_disk, int data)
 {
        return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
 }
 
-int scsi_cmd_ioctl(struct file *file, 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)
 {
-       request_queue_t *q;
        int err;
 
-       q = bd_disk->queue;
-       if (!q)
-               return -ENXIO;
-
-       if (blk_get_queue(q))
+       if (!q || blk_get_queue(q))
                return -ENXIO;
 
        switch (cmd) {
@@ -604,7 +559,7 @@ int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd,
                        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;
 
@@ -648,11 +603,11 @@ int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd,
                        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;
 
@@ -676,7 +631,7 @@ int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd,
                        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);