config: tegra3: enable /dev mount with ACL
[linux-2.6.git] / block / bsg.c
index 2d746e3..702f131 100644 (file)
 #include <linux/blkdev.h>
 #include <linux/poll.h>
 #include <linux/cdev.h>
+#include <linux/jiffies.h>
 #include <linux/percpu.h>
 #include <linux/uio.h>
 #include <linux/idr.h>
 #include <linux/bsg.h>
-#include <linux/smp_lock.h>
+#include <linux/slab.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_ioctl.h>
@@ -181,12 +182,12 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
                        return -ENOMEM;
        }
 
-       if (copy_from_user(rq->cmd, (void *)(unsigned long)hdr->request,
+       if (copy_from_user(rq->cmd, (void __user *)(unsigned long)hdr->request,
                           hdr->request_len))
                return -EFAULT;
 
        if (hdr->subprotocol == BSG_SUB_PROTOCOL_SCSI_CMD) {
-               if (blk_verify_command(&q->cmd_filter, rq->cmd, has_write_perm))
+               if (blk_verify_command(rq->cmd, has_write_perm))
                        return -EPERM;
        } else if (!capable(CAP_SYS_RAWIO))
                return -EPERM;
@@ -197,7 +198,7 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
        rq->cmd_len = hdr->request_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)
@@ -248,7 +249,15 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
        struct request *rq, *next_rq = NULL;
        int ret, rw;
        unsigned int dxfer_len;
-       void *dxferp = NULL;
+       void __user *dxferp = NULL;
+       struct bsg_class_device *bcd = &q->bsg_dev;
+
+       /* if the LLD has been removed then the bsg_unregister_queue will
+        * eventually be called and the class_dev was freed, so we can no
+        * longer use this request_queue. Return no such address.
+        */
+       if (!bcd->class_dev)
+               return ERR_PTR(-ENXIO);
 
        dprintk("map hdr %llx/%u %llx/%u\n", (unsigned long long) hdr->dout_xferp,
                hdr->dout_xfer_len, (unsigned long long) hdr->din_xferp,
@@ -259,7 +268,7 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
                return ERR_PTR(ret);
 
        /*
-        * map scatter-gather elements seperately and string them to request
+        * map scatter-gather elements separately and string them to request
         */
        rq = blk_get_request(q, rw, GFP_KERNEL);
        if (!rq)
@@ -282,7 +291,7 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
                rq->next_rq = next_rq;
                next_rq->cmd_type = rq->cmd_type;
 
-               dxferp = (void*)(unsigned long)hdr->din_xferp;
+               dxferp = (void __user *)(unsigned long)hdr->din_xferp;
                ret =  blk_rq_map_user(q, next_rq, NULL, dxferp,
                                       hdr->din_xfer_len, GFP_KERNEL);
                if (ret)
@@ -291,10 +300,10 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
 
        if (hdr->dout_xfer_len) {
                dxfer_len = hdr->dout_xfer_len;
-               dxferp = (void*)(unsigned long)hdr->dout_xferp;
+               dxferp = (void __user *)(unsigned long)hdr->dout_xferp;
        } else if (hdr->din_xfer_len) {
                dxfer_len = hdr->din_xfer_len;
-               dxferp = (void*)(unsigned long)hdr->din_xferp;
+               dxferp = (void __user *)(unsigned long)hdr->din_xferp;
        } else
                dxfer_len = 0;
 
@@ -424,7 +433,7 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
        /*
         * fill in all the output members
         */
-       hdr->device_status = status_byte(rq->errors);
+       hdr->device_status = rq->errors & 0xff;
        hdr->transport_status = host_byte(rq->errors);
        hdr->driver_status = driver_byte(rq->errors);
        hdr->info = 0;
@@ -436,7 +445,7 @@ static int blk_complete_sgv4_hdr_rq(struct request *rq, struct sg_io_v4 *hdr,
                int len = min_t(unsigned int, hdr->max_response_len,
                                        rq->sense_len);
 
-               ret = copy_to_user((void*)(unsigned long)hdr->response,
+               ret = copy_to_user((void __user *)(unsigned long)hdr->response,
                                   rq->sense, len);
                if (!ret)
                        hdr->response_len = len;
@@ -597,7 +606,7 @@ bsg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
        ret = __bsg_read(buf, count, bd, NULL, &bytes_read);
        *ppos = bytes_read;
 
-       if (!bytes_read || (bytes_read && err_block_err(ret)))
+       if (!bytes_read || err_block_err(ret))
                bytes_read = ret;
 
        return bytes_read;
@@ -677,7 +686,7 @@ bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
        /*
         * return bytes written on non-fatal errors
         */
-       if (!bytes_written || (bytes_written && err_block_err(ret)))
+       if (!bytes_written || err_block_err(ret))
                bytes_written = ret;
 
        dprintk("%s: returning %Zd\n", bd->name, bytes_written);
@@ -841,9 +850,7 @@ static int bsg_open(struct inode *inode, struct file *file)
 {
        struct bsg_device *bd;
 
-       lock_kernel();
        bd = bsg_get_device(inode, file);
-       unlock_kernel();
 
        if (IS_ERR(bd))
                return PTR_ERR(bd);
@@ -871,7 +878,7 @@ static unsigned int bsg_poll(struct file *file, poll_table *wait)
        spin_lock_irq(&bd->lock);
        if (!list_empty(&bd->done_list))
                mask |= POLLIN | POLLRDNORM;
-       if (bd->queued_cmds >= bd->max_queue)
+       if (bd->queued_cmds < bd->max_queue)
                mask |= POLLOUT;
        spin_unlock_irq(&bd->lock);
 
@@ -966,6 +973,7 @@ static const struct file_operations bsg_fops = {
        .release        =       bsg_release,
        .unlocked_ioctl =       bsg_ioctl,
        .owner          =       THIS_MODULE,
+       .llseek         =       default_llseek,
 };
 
 void bsg_unregister_queue(struct request_queue *q)
@@ -1062,6 +1070,11 @@ EXPORT_SYMBOL_GPL(bsg_register_queue);
 
 static struct cdev bsg_cdev;
 
+static char *bsg_devnode(struct device *dev, mode_t *mode)
+{
+       return kasprintf(GFP_KERNEL, "bsg/%s", dev_name(dev));
+}
+
 static int __init bsg_init(void)
 {
        int ret, i;
@@ -1082,6 +1095,7 @@ static int __init bsg_init(void)
                ret = PTR_ERR(bsg_class);
                goto destroy_kmemcache;
        }
+       bsg_class->devnode = bsg_devnode;
 
        ret = alloc_chrdev_region(&devid, 0, BSG_MAX_DEVS, "bsg");
        if (ret)