} Sg_request;
typedef struct sg_fd { /* holds the state of a file descriptor */
- struct sg_fd *nextfp; /* NULL when last opened fd on this device */
+ struct list_head sfd_siblings;
struct sg_device *parentdp; /* owning device */
wait_queue_head_t read_wait; /* queue read until command done */
rwlock_t rq_list_lock; /* protect access to list in req_arr */
wait_queue_head_t o_excl_wait; /* queue open() when O_EXCL in use */
int sg_tablesize; /* adapter's max scatter-gather table size */
u32 index; /* device index number */
- Sg_fd *headfp; /* first open fd belonging to this device */
+ struct list_head sfds;
volatile char detached; /* 0->attached, 1->detached pending removal */
volatile char exclude; /* opened for exclusive access */
char sgdebug; /* 0->off, 1->sense, 9->dump dev, 10-> all devs */
/* tasklet or soft irq callback */
static void sg_rq_end_io(struct request *rq, int uptodate);
static int sg_start_req(Sg_request *srp, unsigned char *cmd);
-static void sg_finish_rem_req(Sg_request * srp);
+static int sg_finish_rem_req(Sg_request * srp);
static int sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size);
static ssize_t sg_new_read(Sg_fd * sfp, char __user *buf, size_t count,
Sg_request * srp);
static int sg_allow_access(struct file *filp, unsigned char *cmd)
{
struct sg_fd *sfp = (struct sg_fd *)filp->private_data;
- struct request_queue *q = sfp->parentdp->device->request_queue;
if (sfp->parentdp->device->type == TYPE_SCANNER)
return 0;
- return blk_verify_command(&q->cmd_filter,
- cmd, filp->f_mode & FMODE_WRITE);
+ return blk_verify_command(cmd, filp->f_mode & FMODE_WRITE);
}
static int
retval = -EPERM; /* Can't lock it with read only access */
goto error_out;
}
- if (sdp->headfp && (flags & O_NONBLOCK)) {
+ if (!list_empty(&sdp->sfds) && (flags & O_NONBLOCK)) {
retval = -EBUSY;
goto error_out;
}
res = 0;
__wait_event_interruptible(sdp->o_excl_wait,
- ((sdp->headfp || sdp->exclude) ? 0 : (sdp->exclude = 1)), res);
+ ((!list_empty(&sdp->sfds) || sdp->exclude) ? 0 : (sdp->exclude = 1)), res);
if (res) {
retval = res; /* -ERESTARTSYS because signal hit process */
goto error_out;
retval = -ENODEV;
goto error_out;
}
- if (!sdp->headfp) { /* no existing opens on this device */
+ if (list_empty(&sdp->sfds)) { /* no existing opens on this device */
sdp->sgdebug = 0;
q = sdp->device->request_queue;
- sdp->sg_tablesize = min(q->max_hw_segments,
- q->max_phys_segments);
+ sdp->sg_tablesize = min(queue_max_hw_segments(q),
+ queue_max_phys_segments(q));
}
if ((sfp = sg_add_sfp(sdp, dev)))
filp->private_data = sfp;
goto err_out;
}
err_out:
- sg_finish_rem_req(srp);
+ err = sg_finish_rem_req(srp);
return (0 == err) ? count : err;
}
if (strcmp(current->comm, cmd) && printk_ratelimit()) {
printk(KERN_WARNING
"sg_write: data in/out %d/%d bytes for SCSI command 0x%x--"
- "guessing data in;\n" KERN_WARNING " "
+ "guessing data in;\n "
"program %s not setting count and/or reply_len properly\n",
old_hdr.reply_len - (int)SZ_SG_HEADER,
input_size, (unsigned int) cmnd[0],
if (val < 0)
return -EINVAL;
val = min_t(int, val,
- sdp->device->request_queue->max_sectors * 512);
+ queue_max_sectors(sdp->device->request_queue) * 512);
if (val != sfp->reserve.bufflen) {
if (sg_res_in_use(sfp) || sfp->mmap_called)
return -EBUSY;
return 0;
case SG_GET_RESERVED_SIZE:
val = min_t(int, sfp->reserve.bufflen,
- sdp->device->request_queue->max_sectors * 512);
+ queue_max_sectors(sdp->device->request_queue) * 512);
return put_user(val, ip);
case SG_SET_COMMAND_Q:
result = get_user(val, ip);
return -ENODEV;
return scsi_ioctl(sdp->device, cmd_in, p);
case BLKSECTGET:
- return put_user(sdp->device->request_queue->max_sectors * 512,
+ return put_user(queue_max_sectors(sdp->device->request_queue) * 512,
ip);
case BLKTRACESETUP:
return blk_trace_setup(sdp->device->request_queue,
sdp->disk->disk_name,
MKDEV(SCSI_GENERIC_MAJOR, sdp->index),
+ NULL,
(char *)arg);
case BLKTRACESTART:
return blk_trace_startstop(sdp->device->request_queue, 1);
static int
sg_fasync(int fd, struct file *filp, int mode)
{
- int retval;
Sg_device *sdp;
Sg_fd *sfp;
SCSI_LOG_TIMEOUT(3, printk("sg_fasync: %s, mode=%d\n",
sdp->disk->disk_name, mode));
- retval = fasync_helper(fd, filp, mode, &sfp->async_qp);
- return (retval < 0) ? retval : 0;
+ return fasync_helper(fd, filp, mode, &sfp->async_qp);
}
static int
return VM_FAULT_SIGBUS;
}
-static struct vm_operations_struct sg_mmap_vm_ops = {
+static const struct vm_operations_struct sg_mmap_vm_ops = {
.fault = sg_vma_fault,
};
sense = rq->sense;
result = rq->errors;
- resid = rq->data_len;
+ resid = rq->resid_len;
SCSI_LOG_TIMEOUT(4, printk("sg_cmd_done: %s, pack_id=%d, res=0x%x\n",
sdp->disk->disk_name, srp->header.pack_id, result));
wake_up_interruptible(&sfp->read_wait);
kill_fasync(&sfp->async_qp, SIGPOLL, POLL_IN);
kref_put(&sfp->f_ref, sg_remove_sfp);
- } else
- execute_in_process_context(sg_rq_end_io_usercontext, &srp->ew);
+ } else {
+ INIT_WORK(&srp->ew.work, sg_rq_end_io_usercontext);
+ schedule_work(&srp->ew.work);
+ }
}
-static struct file_operations sg_fops = {
+static const struct file_operations sg_fops = {
.owner = THIS_MODULE,
.read = sg_read,
.write = sg_write,
disk->first_minor = k;
sdp->disk = disk;
sdp->device = scsidp;
+ INIT_LIST_HEAD(&sdp->sfds);
init_waitqueue_head(&sdp->o_excl_wait);
- sdp->sg_tablesize = min(q->max_hw_segments, q->max_phys_segments);
+ sdp->sg_tablesize = min(queue_max_hw_segments(q),
+ queue_max_phys_segments(q));
sdp->index = k;
kref_init(&sdp->d_ref);
/* Need a write lock to set sdp->detached. */
write_lock_irqsave(&sg_index_lock, iflags);
sdp->detached = 1;
- for (sfp = sdp->headfp; sfp; sfp = sfp->nextfp) {
+ list_for_each_entry(sfp, &sdp->sfds, sfd_siblings) {
wake_up_interruptible(&sfp->read_wait);
kill_fasync(&sfp->async_qp, SIGPOLL, POLL_HUP);
}
md->nr_entries = req_schp->k_use_sg;
md->offset = 0;
md->null_mapped = hp->dxferp ? 0 : 1;
+ if (dxfer_dir == SG_DXFER_TO_FROM_DEV)
+ md->from_user = 1;
+ else
+ md->from_user = 0;
}
- if (iov_count)
- res = blk_rq_map_user_iov(q, rq, md, hp->dxferp, iov_count,
- hp->dxfer_len, GFP_ATOMIC);
- else
+ if (iov_count) {
+ int len, size = sizeof(struct sg_iovec) * iov_count;
+ struct iovec *iov;
+
+ iov = kmalloc(size, GFP_ATOMIC);
+ if (!iov)
+ return -ENOMEM;
+
+ if (copy_from_user(iov, hp->dxferp, size)) {
+ kfree(iov);
+ return -EFAULT;
+ }
+
+ len = iov_length(iov, iov_count);
+ if (hp->dxfer_len < len) {
+ iov_count = iov_shorten(iov, iov_count, hp->dxfer_len);
+ len = hp->dxfer_len;
+ }
+
+ res = blk_rq_map_user_iov(q, rq, md, (struct sg_iovec *)iov,
+ iov_count,
+ len, GFP_ATOMIC);
+ kfree(iov);
+ } else
res = blk_rq_map_user(q, rq, md, hp->dxferp,
hp->dxfer_len, GFP_ATOMIC);
return res;
}
-static void
-sg_finish_rem_req(Sg_request * srp)
+static int sg_finish_rem_req(Sg_request * srp)
{
+ int ret = 0;
+
Sg_fd *sfp = srp->parentfp;
Sg_scatter_hold *req_schp = &srp->data;
if (srp->rq) {
if (srp->bio)
- blk_rq_unmap_user(srp->bio);
+ ret = blk_rq_unmap_user(srp->bio);
blk_put_request(srp->rq);
}
sg_remove_request(sfp, srp);
+
+ return ret;
}
static int
return 0;
out:
for (i = 0; i < k; i++)
- __free_pages(schp->pages[k], order);
+ __free_pages(schp->pages[i], order);
if (--order >= 0)
goto retry;
sfp->keep_orphan = SG_DEF_KEEP_ORPHAN;
sfp->parentdp = sdp;
write_lock_irqsave(&sg_index_lock, iflags);
- if (!sdp->headfp)
- sdp->headfp = sfp;
- else { /* add to tail of existing list */
- Sg_fd *pfp = sdp->headfp;
- while (pfp->nextfp)
- pfp = pfp->nextfp;
- pfp->nextfp = sfp;
- }
+ list_add_tail(&sfp->sfd_siblings, &sdp->sfds);
write_unlock_irqrestore(&sg_index_lock, iflags);
SCSI_LOG_TIMEOUT(3, printk("sg_add_sfp: sfp=0x%p\n", sfp));
if (unlikely(sg_big_buff != def_reserved_size))
sg_big_buff = def_reserved_size;
bufflen = min_t(int, sg_big_buff,
- sdp->device->request_queue->max_sectors * 512);
+ queue_max_sectors(sdp->device->request_queue) * 512);
sg_build_reserve(sfp, bufflen);
SCSI_LOG_TIMEOUT(3, printk("sg_add_sfp: bufflen=%d, k_use_sg=%d\n",
sfp->reserve.bufflen, sfp->reserve.k_use_sg));
{
struct sg_fd *sfp = container_of(kref, struct sg_fd, f_ref);
struct sg_device *sdp = sfp->parentdp;
- Sg_fd *fp;
- Sg_fd *prev_fp;
unsigned long iflags;
- /* CAUTION! Note that sfp can still be found by walking sdp->headfp
- * even though the refcount is now 0. Therefore, unlink sfp from
- * sdp->headfp BEFORE doing any other cleanup.
- */
-
write_lock_irqsave(&sg_index_lock, iflags);
- prev_fp = sdp->headfp;
- if (sfp == prev_fp)
- sdp->headfp = prev_fp->nextfp;
- else {
- while ((fp = prev_fp->nextfp)) {
- if (sfp == fp) {
- prev_fp->nextfp = fp->nextfp;
- break;
- }
- prev_fp = fp;
- }
- }
+ list_del(&sfp->sfd_siblings);
write_unlock_irqrestore(&sg_index_lock, iflags);
wake_up_interruptible(&sdp->o_excl_wait);
- execute_in_process_context(sg_remove_sfp_usercontext, &sfp->ew);
+ INIT_WORK(&sfp->ew.work, sg_remove_sfp_usercontext);
+ schedule_work(&sfp->ew.work);
}
static int
static int sg_proc_single_open_adio(struct inode *inode, struct file *file);
static ssize_t sg_proc_write_adio(struct file *filp, const char __user *buffer,
size_t count, loff_t *off);
-static struct file_operations adio_fops = {
- /* .owner, .read and .llseek added in sg_proc_init() */
+static const struct file_operations adio_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_single_open_adio,
+ .read = seq_read,
+ .llseek = seq_lseek,
.write = sg_proc_write_adio,
.release = single_release,
};
static int sg_proc_single_open_dressz(struct inode *inode, struct file *file);
static ssize_t sg_proc_write_dressz(struct file *filp,
const char __user *buffer, size_t count, loff_t *off);
-static struct file_operations dressz_fops = {
+static const struct file_operations dressz_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_single_open_dressz,
+ .read = seq_read,
+ .llseek = seq_lseek,
.write = sg_proc_write_dressz,
.release = single_release,
};
static int sg_proc_seq_show_version(struct seq_file *s, void *v);
static int sg_proc_single_open_version(struct inode *inode, struct file *file);
-static struct file_operations version_fops = {
+static const struct file_operations version_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_single_open_version,
+ .read = seq_read,
+ .llseek = seq_lseek,
.release = single_release,
};
static int sg_proc_seq_show_devhdr(struct seq_file *s, void *v);
static int sg_proc_single_open_devhdr(struct inode *inode, struct file *file);
-static struct file_operations devhdr_fops = {
+static const struct file_operations devhdr_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_single_open_devhdr,
+ .read = seq_read,
+ .llseek = seq_lseek,
.release = single_release,
};
static void * dev_seq_start(struct seq_file *s, loff_t *pos);
static void * dev_seq_next(struct seq_file *s, void *v, loff_t *pos);
static void dev_seq_stop(struct seq_file *s, void *v);
-static struct file_operations dev_fops = {
+static const struct file_operations dev_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_open_dev,
+ .read = seq_read,
+ .llseek = seq_lseek,
.release = seq_release,
};
-static struct seq_operations dev_seq_ops = {
+static const struct seq_operations dev_seq_ops = {
.start = dev_seq_start,
.next = dev_seq_next,
.stop = dev_seq_stop,
static int sg_proc_seq_show_devstrs(struct seq_file *s, void *v);
static int sg_proc_open_devstrs(struct inode *inode, struct file *file);
-static struct file_operations devstrs_fops = {
+static const struct file_operations devstrs_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_open_devstrs,
+ .read = seq_read,
+ .llseek = seq_lseek,
.release = seq_release,
};
-static struct seq_operations devstrs_seq_ops = {
+static const struct seq_operations devstrs_seq_ops = {
.start = dev_seq_start,
.next = dev_seq_next,
.stop = dev_seq_stop,
static int sg_proc_seq_show_debug(struct seq_file *s, void *v);
static int sg_proc_open_debug(struct inode *inode, struct file *file);
-static struct file_operations debug_fops = {
+static const struct file_operations debug_fops = {
+ .owner = THIS_MODULE,
.open = sg_proc_open_debug,
+ .read = seq_read,
+ .llseek = seq_lseek,
.release = seq_release,
};
-static struct seq_operations debug_seq_ops = {
+static const struct seq_operations debug_seq_ops = {
.start = dev_seq_start,
.next = dev_seq_next,
.stop = dev_seq_stop,
struct sg_proc_leaf {
const char * name;
- struct file_operations * fops;
+ const struct file_operations * fops;
};
static struct sg_proc_leaf sg_proc_leaf_arr[] = {
for (k = 0; k < num_leaves; ++k) {
leaf = &sg_proc_leaf_arr[k];
mask = leaf->fops->write ? S_IRUGO | S_IWUSR : S_IRUGO;
- leaf->fops->owner = THIS_MODULE;
- leaf->fops->read = seq_read;
- leaf->fops->llseek = seq_lseek;
proc_create(leaf->name, mask, sg_proc_sgp, leaf->fops);
}
return 0;
const char * cp;
unsigned int ms;
- for (k = 0, fp = sdp->headfp; fp != NULL; ++k, fp = fp->nextfp) {
+ k = 0;
+ list_for_each_entry(fp, &sdp->sfds, sfd_siblings) {
+ k++;
read_lock(&fp->rq_list_lock); /* irqs already disabled */
seq_printf(s, " FD(%d): timeout=%dms bufflen=%d "
- "(res)sgat=%d low_dma=%d\n", k + 1,
+ "(res)sgat=%d low_dma=%d\n", k,
jiffies_to_msecs(fp->timeout),
fp->reserve.bufflen,
(int) fp->reserve.k_use_sg,
read_lock_irqsave(&sg_index_lock, iflags);
sdp = it ? sg_lookup_dev(it->index) : NULL;
- if (sdp && sdp->headfp) {
+ if (sdp && !list_empty(&sdp->sfds)) {
struct scsi_device *scsidp = sdp->device;
seq_printf(s, " >>> device=%s ", sdp->disk->disk_name);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff