Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 580 insertions, 0 deletions

diff --git a/drivers/block/scsi_ioctl.c b/drivers/block/scsi_ioctl.c
new file mode 100644
index 00000000000..689527a89de
--- /dev/null
+++ b/drivers/block/scsi_ioctl.c
@@ -0,0 +1,580 @@
+/*
+ * Copyright (C) 2001 Jens Axboe <axboe@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public Licens
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/completion.h>
+#include <linux/cdrom.h>
+#include <linux/slab.h>
+#include <linux/times.h>
+#include <asm/uaccess.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_ioctl.h>
+#include <scsi/scsi_cmnd.h>
+
+/* Command group 3 is reserved and should never be used.  */
+const unsigned char scsi_command_size[8] =
+{
+        6, 10, 10, 12,
+        16, 12, 10, 10
+};
+
+EXPORT_SYMBOL(scsi_command_size);
+
+#define BLK_DEFAULT_TIMEOUT     (60 * HZ)
+
+#include <scsi/sg.h>
+
+static int sg_get_version(int __user *p)
+{
+        static int sg_version_num = 30527;
+        return put_user(sg_version_num, p);
+}
+
+static int scsi_get_idlun(request_queue_t *q, int __user *p)
+{
+        return put_user(0, p);
+}
+
+static int scsi_get_bus(request_queue_t *q, int __user *p)
+{
+        return put_user(0, p);
+}
+
+static int sg_get_timeout(request_queue_t *q)
+{
+        return q->sg_timeout / (HZ / USER_HZ);
+}
+
+static int sg_set_timeout(request_queue_t *q, int __user *p)
+{
+        int timeout, err = get_user(timeout, p);
+
+        if (!err)
+                q->sg_timeout = timeout * (HZ / USER_HZ);
+
+        return err;
+}
+
+static int sg_get_reserved_size(request_queue_t *q, int __user *p)
+{
+        return put_user(q->sg_reserved_size, p);
+}
+
+static int sg_set_reserved_size(request_queue_t *q, int __user *p)
+{
+        int size, err = get_user(size, p);
+
+        if (err)
+                return err;
+
+        if (size < 0)
+                return -EINVAL;
+        if (size > (q->max_sectors << 9))
+                size = q->max_sectors << 9;
+
+        q->sg_reserved_size = size;
+        return 0;
+}
+
+/*
+ * 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)
+{
+        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(struct file *file, unsigned char *cmd)
+{
+        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_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(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) {
+                if (file->f_mode & FMODE_WRITE)
+                        return 0;
+        }
+
+        if (!type) {
+                cmd_type[cmd[0]] = CMD_WARNED;
+                printk(KERN_WARNING "scsi: unknown opcode 0x%02x\n", cmd[0]);
+        }
+
+        /* And root can do any command.. */
+        if (capable(CAP_SYS_RAWIO))
+                return 0;
+
+        /* Otherwise fail it with an "Operation not permitted" */
+        return -EPERM;
+}
+
+static int sg_io(struct file *file, request_queue_t *q,
+                struct gendisk *bd_disk, struct sg_io_hdr *hdr)
+{
+        unsigned long start_time;
+        int reading, writing;
+        struct request *rq;
+        struct bio *bio;
+        char sense[SCSI_SENSE_BUFFERSIZE];
+        unsigned char cmd[BLK_MAX_CDB];
+
+        if (hdr->interface_id != 'S')
+                return -EINVAL;
+        if (hdr->cmd_len > BLK_MAX_CDB)
+                return -EINVAL;
+        if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
+                return -EFAULT;
+        if (verify_command(file, cmd))
+                return -EPERM;
+
+        /*
+         * we'll do that later
+         */
+        if (hdr->iovec_count)
+                return -EOPNOTSUPP;
+
+        if (hdr->dxfer_len > (q->max_sectors << 9))
+                return -EIO;
+
+        reading = writing = 0;
+        if (hdr->dxfer_len) {
+                switch (hdr->dxfer_direction) {
+                default:
+                        return -EINVAL;
+                case SG_DXFER_TO_FROM_DEV:
+                        reading = 1;
+                        /* fall through */
+                case SG_DXFER_TO_DEV:
+                        writing = 1;
+                        break;
+                case SG_DXFER_FROM_DEV:
+                        reading = 1;
+                        break;
+                }
+
+                rq = blk_rq_map_user(q, writing ? WRITE : READ, hdr->dxferp,
+                                     hdr->dxfer_len);
+
+                if (IS_ERR(rq))
+                        return PTR_ERR(rq);
+        } else
+                rq = blk_get_request(q, READ, __GFP_WAIT);
+
+        /*
+         * fill in request structure
+         */
+        rq->cmd_len = hdr->cmd_len;
+        memcpy(rq->cmd, cmd, hdr->cmd_len);
+        if (sizeof(rq->cmd) != hdr->cmd_len)
+                memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len);
+
+        memset(sense, 0, sizeof(sense));
+        rq->sense = sense;
+        rq->sense_len = 0;
+
+        rq->flags |= REQ_BLOCK_PC;
+        bio = rq->bio;
+
+        /*
+         * bounce this after holding a reference to the original bio, it's
+         * needed for proper unmapping
+         */
+        if (rq->bio)
+                blk_queue_bounce(q, &rq->bio);
+
+        rq->timeout = (hdr->timeout * HZ) / 1000;
+        if (!rq->timeout)
+                rq->timeout = q->sg_timeout;
+        if (!rq->timeout)
+                rq->timeout = BLK_DEFAULT_TIMEOUT;
+
+        start_time = jiffies;
+
+        /* ignore return value. All information is passed back to caller
+         * (if he doesn't check that is his problem).
+         * N.B. a non-zero SCSI status is _not_ necessarily an error.
+         */
+        blk_execute_rq(q, bd_disk, rq);
+
+        /* write to all output members */
+        hdr->status = 0xff & rq->errors;
+        hdr->masked_status = status_byte(rq->errors);
+        hdr->msg_status = msg_byte(rq->errors);
+        hdr->host_status = host_byte(rq->errors);
+        hdr->driver_status = driver_byte(rq->errors);
+        hdr->info = 0;
+        if (hdr->masked_status || hdr->host_status || hdr->driver_status)
+                hdr->info |= SG_INFO_CHECK;
+        hdr->resid = rq->data_len;
+        hdr->duration = ((jiffies - start_time) * 1000) / HZ;
+        hdr->sb_len_wr = 0;
+
+        if (rq->sense_len && hdr->sbp) {
+                int len = min((unsigned int) hdr->mx_sb_len, rq->sense_len);
+
+                if (!copy_to_user(hdr->sbp, rq->sense, len))
+                        hdr->sb_len_wr = len;
+        }
+
+        if (blk_rq_unmap_user(rq, bio, hdr->dxfer_len))
+                return -EFAULT;
+
+        /* may not have succeeded, but output values written to control
+         * structure (struct sg_io_hdr).  */
+        return 0;
+}
+
+#define FORMAT_UNIT_TIMEOUT             (2 * 60 * 60 * HZ)
+#define START_STOP_TIMEOUT              (60 * HZ)
+#define MOVE_MEDIUM_TIMEOUT             (5 * 60 * HZ)
+#define READ_ELEMENT_STATUS_TIMEOUT     (5 * 60 * HZ)
+#define READ_DEFECT_DATA_TIMEOUT        (60 * HZ )
+#define OMAX_SB_LEN 16          /* For backward compatibility */
+
+static int sg_scsi_ioctl(struct file *file, request_queue_t *q,
+                         struct gendisk *bd_disk, Scsi_Ioctl_Command __user *sic)
+{
+        struct request *rq;
+        int err;
+        unsigned int in_len, out_len, bytes, opcode, cmdlen;
+        char *buffer = NULL, sense[SCSI_SENSE_BUFFERSIZE];
+
+        /*
+         * get in an out lengths, verify they don't exceed a page worth of data
+         */
+        if (get_user(in_len, &sic->inlen))
+                return -EFAULT;
+        if (get_user(out_len, &sic->outlen))
+                return -EFAULT;
+        if (in_len > PAGE_SIZE || out_len > PAGE_SIZE)
+                return -EINVAL;
+        if (get_user(opcode, sic->data))
+                return -EFAULT;
+
+        bytes = max(in_len, out_len);
+        if (bytes) {
+                buffer = kmalloc(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);
+
+        cmdlen = COMMAND_SIZE(opcode);
+
+        /*
+         * get command and data to send to device, if any
+         */
+        err = -EFAULT;
+        rq->cmd_len = cmdlen;
+        if (copy_from_user(rq->cmd, sic->data, cmdlen))
+                goto error;
+
+        if (copy_from_user(buffer, sic->data + cmdlen, in_len))
+                goto error;
+
+        err = verify_command(file, rq->cmd);
+        if (err)
+                goto error;
+
+        switch (opcode) {
+                case SEND_DIAGNOSTIC:
+                case FORMAT_UNIT:
+                        rq->timeout = FORMAT_UNIT_TIMEOUT;
+                        break;
+                case START_STOP:
+                        rq->timeout = START_STOP_TIMEOUT;
+                        break;
+                case MOVE_MEDIUM:
+                        rq->timeout = MOVE_MEDIUM_TIMEOUT;
+                        break;
+                case READ_ELEMENT_STATUS:
+                        rq->timeout = READ_ELEMENT_STATUS_TIMEOUT;
+                        break;
+                case READ_DEFECT_DATA:
+                        rq->timeout = READ_DEFECT_DATA_TIMEOUT;
+                        break;
+                default:
+                        rq->timeout = BLK_DEFAULT_TIMEOUT;
+                        break;
+        }
+
+        memset(sense, 0, sizeof(sense));
+        rq->sense = sense;
+        rq->sense_len = 0;
+
+        rq->data = buffer;
+        rq->data_len = bytes;
+        rq->flags |= REQ_BLOCK_PC;
+
+        blk_execute_rq(q, bd_disk, rq);
+        err = rq->errors & 0xff;        /* only 8 bit SCSI status */
+        if (err) {
+                if (rq->sense_len && rq->sense) {
+                        bytes = (OMAX_SB_LEN > rq->sense_len) ?
+                                rq->sense_len : OMAX_SB_LEN;
+                        if (copy_to_user(sic->data, rq->sense, bytes))
+                                err = -EFAULT;
+                }
+        } else {
+                if (copy_to_user(sic->data, buffer, out_len))
+                        err = -EFAULT;
+        }
+        
+error:
+        kfree(buffer);
+        blk_put_request(rq);
+        return err;
+}
+
+int scsi_cmd_ioctl(struct file *file, struct gendisk *bd_disk, unsigned int cmd, void __user *arg)
+{
+        request_queue_t *q;
+        struct request *rq;
+        int close = 0, err;
+
+        q = bd_disk->queue;
+        if (!q)
+                return -ENXIO;
+
+        if (blk_get_queue(q))
+                return -ENXIO;
+
+        switch (cmd) {
+                /*
+                 * new sgv3 interface
+                 */
+                case SG_GET_VERSION_NUM:
+                        err = sg_get_version(arg);
+                        break;
+                case SCSI_IOCTL_GET_IDLUN:
+                        err = scsi_get_idlun(q, arg);
+                        break;
+                case SCSI_IOCTL_GET_BUS_NUMBER:
+                        err = scsi_get_bus(q, arg);
+                        break;
+                case SG_SET_TIMEOUT:
+                        err = sg_set_timeout(q, arg);
+                        break;
+                case SG_GET_TIMEOUT:
+                        err = sg_get_timeout(q);
+                        break;
+                case SG_GET_RESERVED_SIZE:
+                        err = sg_get_reserved_size(q, arg);
+                        break;
+                case SG_SET_RESERVED_SIZE:
+                        err = sg_set_reserved_size(q, arg);
+                        break;
+                case SG_EMULATED_HOST:
+                        err = sg_emulated_host(q, arg);
+                        break;
+                case SG_IO: {
+                        struct sg_io_hdr hdr;
+
+                        err = -EFAULT;
+                        if (copy_from_user(&hdr, arg, sizeof(hdr)))
+                                break;
+                        err = sg_io(file, q, bd_disk, &hdr);
+                        if (err == -EFAULT)
+                                break;
+
+                        if (copy_to_user(arg, &hdr, sizeof(hdr)))
+                                err = -EFAULT;
+                        break;
+                }
+                case CDROM_SEND_PACKET: {
+                        struct cdrom_generic_command cgc;
+                        struct sg_io_hdr hdr;
+
+                        err = -EFAULT;
+                        if (copy_from_user(&cgc, arg, sizeof(cgc)))
+                                break;
+                        cgc.timeout = clock_t_to_jiffies(cgc.timeout);
+                        memset(&hdr, 0, sizeof(hdr));
+                        hdr.interface_id = 'S';
+                        hdr.cmd_len = sizeof(cgc.cmd);
+                        hdr.dxfer_len = cgc.buflen;
+                        err = 0;
+                        switch (cgc.data_direction) {
+                                case CGC_DATA_UNKNOWN:
+                                        hdr.dxfer_direction = SG_DXFER_UNKNOWN;
+                                        break;
+                                case CGC_DATA_WRITE:
+                                        hdr.dxfer_direction = SG_DXFER_TO_DEV;
+                                        break;
+                                case CGC_DATA_READ:
+                                        hdr.dxfer_direction = SG_DXFER_FROM_DEV;
+                                        break;
+                                case CGC_DATA_NONE:
+                                        hdr.dxfer_direction = SG_DXFER_NONE;
+                                        break;
+                                default:
+                                        err = -EINVAL;
+                        }
+                        if (err)
+                                break;
+
+                        hdr.dxferp = cgc.buffer;
+                        hdr.sbp = cgc.sense;
+                        if (hdr.sbp)
+                                hdr.mx_sb_len = sizeof(struct request_sense);
+                        hdr.timeout = 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);
+                        if (err == -EFAULT)
+                                break;
+
+                        if (hdr.status)
+                                err = -EIO;
+
+                        cgc.stat = err;
+                        cgc.buflen = hdr.resid;
+                        if (copy_to_user(arg, &cgc, sizeof(cgc)))
+                                err = -EFAULT;
+
+                        break;
+                }
+
+                /*
+                 * old junk scsi send command ioctl
+                 */
+                case SCSI_IOCTL_SEND_COMMAND:
+                        printk(KERN_WARNING "program %s is using a deprecated SCSI ioctl, please convert it to SG_IO\n", current->comm);
+                        err = -EINVAL;
+                        if (!arg)
+                                break;
+
+                        err = sg_scsi_ioctl(file, q, bd_disk, arg);
+                        break;
+                case CDROMCLOSETRAY:
+                        close = 1;
+                case CDROMEJECT:
+                        rq = blk_get_request(q, WRITE, __GFP_WAIT);
+                        rq->flags |= REQ_BLOCK_PC;
+                        rq->data = NULL;
+                        rq->data_len = 0;
+                        rq->timeout = BLK_DEFAULT_TIMEOUT;
+                        memset(rq->cmd, 0, sizeof(rq->cmd));
+                        rq->cmd[0] = GPCMD_START_STOP_UNIT;
+                        rq->cmd[4] = 0x02 + (close != 0);
+                        rq->cmd_len = 6;
+                        err = blk_execute_rq(q, bd_disk, rq);
+                        blk_put_request(rq);
+                        break;
+                default:
+                        err = -ENOTTY;
+        }
+
+        blk_put_queue(q);
+        return err;
+}
+
+EXPORT_SYMBOL(scsi_cmd_ioctl);