static int bsg_transport_fill_hdr(struct request *rq, struct sg_io_v4 *hdr,
fmode_t mode)
{
struct bsg_job *job = blk_mq_rq_to_pdu(rq);
int ret;
job->request_len = hdr->request_len;
job->request = memdup_user(uptr64(hdr->request), hdr->request_len);
if (IS_ERR(job->request))
return PTR_ERR(job->request);
if (hdr->dout_xfer_len && hdr->din_xfer_len) {
job->bidi_rq = blk_get_request(rq->q, REQ_OP_SCSI_IN, 0);
if (IS_ERR(job->bidi_rq)) {
ret = PTR_ERR(job->bidi_rq);
goto out;
}
ret = blk_rq_map_user(rq->q, job->bidi_rq, NULL,
uptr64(hdr->din_xferp), hdr->din_xfer_len,
GFP_KERNEL);
if (ret)
goto out_free_bidi_rq;
job->bidi_bio = job->bidi_rq->bio;
} else {
job->bidi_rq = NULL;
job->bidi_bio = NULL;
}
return 0;
out_free_bidi_rq:
if (job->bidi_rq)
blk_put_request(job->bidi_rq);
out:
kfree(job->request);
return ret;
}
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;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct bio *bio;
if (hdr->interface_id != 'S')
return -EINVAL;
if (hdr->cmd_len > BLK_MAX_CDB)
return -EINVAL;
if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
return -EIO;
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_TO_FROM_DEV:
case SG_DXFER_FROM_DEV:
break;
}
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
blk_put_request(rq);
return -EFAULT;
}
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
size_t iov_data_len;
struct sg_iovec *sg_iov;
struct iovec *iov;
int i;
sg_iov = kmalloc(size, GFP_KERNEL);
if (!sg_iov) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(sg_iov, hdr->dxferp, size)) {
kfree(sg_iov);
ret = -EFAULT;
goto out;
}
/*
* Sum up the vecs, making sure they don't overflow
*/
iov = (struct iovec *) sg_iov;
iov_data_len = 0;
for (i = 0; i < hdr->iovec_count; i++) {
if (iov_data_len + iov[i].iov_len < iov_data_len) {
kfree(sg_iov);
ret = -EINVAL;
goto out;
}
iov_data_len += iov[i].iov_len;
}
/* SG_IO howto says that the shorter of the two wins */
if (hdr->dxfer_len < iov_data_len) {
hdr->iovec_count = iov_shorten(iov,
hdr->iovec_count,
hdr->dxfer_len);
iov_data_len = hdr->dxfer_len;
}
ret = blk_rq_map_user_iov(q, rq, NULL, sg_iov, hdr->iovec_count,
iov_data_len, GFP_KERNEL);
kfree(sg_iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL);
if (ret)
goto out;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
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, 0);
hdr->duration = jiffies_to_msecs(jiffies - start_time);
return blk_complete_sghdr_rq(rq, hdr, bio);
out:
blk_put_request(rq);
return ret;
}
static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
struct sg_io_hdr *hdr, fmode_t mode)
{
unsigned long start_time;
ssize_t ret = 0;
int writing = 0;
int at_head = 0;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct bio *bio;
if (hdr->interface_id != 'S')
return -EINVAL;
if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
return -EIO;
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_TO_FROM_DEV:
case SG_DXFER_FROM_DEV:
break;
}
if (hdr->flags & SG_FLAG_Q_AT_HEAD)
at_head = 1;
ret = -ENOMEM;
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (IS_ERR(rq))
return PTR_ERR(rq);
blk_rq_set_block_pc(rq);
if (hdr->cmd_len > BLK_MAX_CDB) {
rq->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
if (!rq->cmd)
goto out_put_request;
}
ret = blk_fill_sghdr_rq(q, rq, hdr, mode);
if (ret < 0)
goto out_free_cdb;
ret = 0;
if (hdr->iovec_count) {
struct iov_iter i;
struct iovec *iov = NULL;
ret = import_iovec(rq_data_dir(rq),
hdr->dxferp, hdr->iovec_count,
0, &iov, &i);
if (ret < 0)
goto out_free_cdb;
/* SG_IO howto says that the shorter of the two wins */
iov_iter_truncate(&i, hdr->dxfer_len);
ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL);
if (ret)
goto out_free_cdb;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
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, at_head);
hdr->duration = jiffies_to_msecs(jiffies - start_time);
ret = blk_complete_sghdr_rq(rq, hdr, bio);
out_free_cdb:
if (rq->cmd != rq->__cmd)
kfree(rq->cmd);
out_put_request:
blk_put_request(rq);
return ret;
}
static int sg_io(struct file *file, request_queue_t *q,
struct gendisk *bd_disk, struct sg_io_hdr *hdr)
{
unsigned long start_time, timeout;
int writing = 0, ret = 0;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
unsigned char cmd[BLK_MAX_CDB];
struct bio *bio;
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;
if (hdr->dxfer_len > (q->max_hw_sectors << 9))
return -EIO;
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_TO_FROM_DEV:
case SG_DXFER_FROM_DEV:
break;
}
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
/*
* fill in request structure
*/
rq->cmd_len = hdr->cmd_len;
memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
memcpy(rq->cmd, cmd, hdr->cmd_len);
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
timeout = msecs_to_jiffies(hdr->timeout);
rq->timeout = (timeout < INT_MAX) ? timeout : INT_MAX;
if (!rq->timeout)
rq->timeout = q->sg_timeout;
if (!rq->timeout)
rq->timeout = BLK_DEFAULT_TIMEOUT;
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
struct sg_iovec *iov;
iov = kmalloc(size, GFP_KERNEL);
if (!iov) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(iov, hdr->dxferp, size)) {
kfree(iov);
ret = -EFAULT;
goto out;
}
ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
hdr->dxfer_len);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
if (ret)
goto out;
bio = rq->bio;
rq->retries = 0;
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, 0);
/* 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(bio))
ret = -EFAULT;
/* may not have succeeded, but output values written to control
* structure (struct sg_io_hdr). */
out:
blk_put_request(rq);
return ret;
}
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 = rq->errors;
hdr->masked_status = (hdr->status >> 1) & 0x1f;
hdr->msg_status = 0;
hdr->host_status = 0;
hdr->driver_status = 0;
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;
}
static int sg_io(struct file *file, struct request_queue *q,
struct gendisk *bd_disk, struct sg_io_hdr *hdr)
{
unsigned long start_time;
int writing = 0, ret = 0, has_write_perm = 0;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct bio *bio;
if (hdr->interface_id != 'S')
return -EINVAL;
if (hdr->cmd_len > BLK_MAX_CDB)
return -EINVAL;
if (hdr->dxfer_len > (q->max_hw_sectors << 9))
return -EIO;
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_TO_FROM_DEV:
case SG_DXFER_FROM_DEV:
break;
}
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
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_put_request(rq);
return -EFAULT;
}
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
struct sg_iovec *iov;
iov = kmalloc(size, GFP_KERNEL);
if (!iov) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(iov, hdr->dxferp, size)) {
kfree(iov);
ret = -EFAULT;
goto out;
}
ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
hdr->dxfer_len);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
if (ret)
goto out;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
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, 0);
hdr->duration = jiffies_to_msecs(jiffies - start_time);
return blk_complete_sghdr_rq(rq, hdr, bio);
out:
blk_put_request(rq);
return ret;
}
ret = rw_copy_check_uvector(-1, hdr->dxferp, hdr->iovec_count,
0, NULL, &iov);
if (ret < 0) {
kfree(iov);
goto out_free_cdb;
}
/* SG_IO howto says that the shorter of the two wins */
iov_iter_init(&i, rq_data_dir(rq), iov, hdr->iovec_count,
min_t(unsigned, ret, hdr->dxfer_len));
ret = blk_rq_map_user_iov(q, rq, NULL, &i, GFP_KERNEL);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL);
if (ret)
goto out_free_cdb;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
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.
static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd,
int cmd_len, int data_direction, void *buffer, unsigned bufflen,
int use_sg, int timeout, int retries)
{
struct request *req;
struct page **pages = NULL;
struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data;
int err = 0;
int write = (data_direction == DMA_TO_DEVICE);
req = blk_get_request(SRpnt->stp->device->request_queue, write, GFP_KERNEL);
if (!req)
return DRIVER_ERROR << 24;
req->cmd_type = REQ_TYPE_BLOCK_PC;
req->cmd_flags |= REQ_QUIET;
SRpnt->bio = NULL;
if (use_sg) {
struct scatterlist *sg, *sgl = (struct scatterlist *)buffer;
int i;
pages = kzalloc(use_sg * sizeof(struct page *), GFP_KERNEL);
if (!pages)
goto free_req;
for_each_sg(sgl, sg, use_sg, i)
pages[i] = sg_page(sg);
mdata->null_mapped = 1;
mdata->page_order = get_order(sgl[0].length);
mdata->nr_entries =
DIV_ROUND_UP(bufflen, PAGE_SIZE << mdata->page_order);
mdata->offset = 0;
err = blk_rq_map_user(req->q, req, mdata, NULL, bufflen, GFP_KERNEL);
if (err) {
kfree(pages);
goto free_req;
}
SRpnt->bio = req->bio;
mdata->pages = pages;
} else if (bufflen) {
err = blk_rq_map_kern(req->q, req, buffer, bufflen, GFP_KERNEL);
if (err)
goto free_req;
}
req->cmd_len = cmd_len;
memset(req->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
memcpy(req->cmd, cmd, req->cmd_len);
req->sense = SRpnt->sense;
req->sense_len = 0;
req->timeout = timeout;
req->retries = retries;
req->end_io_data = SRpnt;
blk_execute_rq_nowait(req->q, NULL, req, 1, osst_end_async);
return 0;
free_req:
blk_put_request(req);
return DRIVER_ERROR << 24;
}
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;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct bio *bio;
if (hdr->interface_id != 'S')
return -EINVAL;
if (hdr->cmd_len > BLK_MAX_CDB)
return -EINVAL;
if (hdr->dxfer_len > (queue_max_hw_sectors(q) << 9))
return -EIO;
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_TO_FROM_DEV:
case SG_DXFER_FROM_DEV:
break;
}
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
blk_put_request(rq);
return -EFAULT;
}
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
size_t iov_data_len;
struct sg_iovec *sg_iov;
struct iovec *iov;
int i;
sg_iov = kmalloc(size, GFP_KERNEL);
if (!sg_iov) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(sg_iov, hdr->dxferp, size)) {
kfree(sg_iov);
ret = -EFAULT;
goto out;
}
iov = (struct iovec *) sg_iov;
iov_data_len = 0;
for (i = 0; i < hdr->iovec_count; i++) {
if (iov_data_len + iov[i].iov_len < iov_data_len) {
kfree(sg_iov);
ret = -EINVAL;
goto out;
}
iov_data_len += iov[i].iov_len;
}
if (hdr->dxfer_len < iov_data_len) {
hdr->iovec_count = iov_shorten(iov,
hdr->iovec_count,
hdr->dxfer_len);
iov_data_len = hdr->dxfer_len;
}
ret = blk_rq_map_user_iov(q, rq, NULL, sg_iov, hdr->iovec_count,
iov_data_len, GFP_KERNEL);
kfree(sg_iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL);
if (ret)
goto out;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
start_time = jiffies;
blk_execute_rq(q, bd_disk, rq, 0);
hdr->duration = jiffies_to_msecs(jiffies - start_time);
return blk_complete_sghdr_rq(rq, hdr, bio);
out:
blk_put_request(rq);
return ret;
}
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;
struct request *rq;
char sense[SCSI_SENSE_BUFFERSIZE];
struct bio *bio;
#if defined (CONFIG_MIPS_BCM_NDVD)
int cdb_data_xfer_len;
unsigned char cmd[BLK_MAX_CDB];
#endif
if (hdr->interface_id != 'S')
return -EINVAL;
if (hdr->cmd_len > BLK_MAX_CDB)
return -EINVAL;
if (hdr->dxfer_len > (q->max_hw_sectors << 9))
return -EIO;
#if defined (CONFIG_MIPS_BCM_NDVD)
if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))
return -EFAULT;
if (hdr->dxfer_len && bd_disk->sector_size) {
cdb_data_xfer_len = cdb_xfer_len(cmd, bd_disk->sector_size);
if (hdr->dxfer_len < cdb_data_xfer_len) {
printk(KERN_WARNING "\n!!! %s - CMD 0x%02x: CDB Xfer Len 0x%08x GT SG Resource Len 0x%08x !!!\n\n",
__FUNCTION__, cmd[0], cdb_data_xfer_len, hdr->dxfer_len);
BUG();
return -EIO;
}
}
else if (!bd_disk->sector_size)
printk(KERN_WARNING "\n!!! %s - DISK SECTOR SIZE UNINITIALIZED !!!", __FUNCTION__);
#endif
if (hdr->dxfer_len)
switch (hdr->dxfer_direction) {
default:
return -EINVAL;
case SG_DXFER_TO_DEV:
writing = 1;
break;
case SG_DXFER_TO_FROM_DEV:
case SG_DXFER_FROM_DEV:
break;
}
rq = blk_get_request(q, writing ? WRITE : READ, GFP_KERNEL);
if (!rq)
return -ENOMEM;
if (blk_fill_sghdr_rq(q, rq, hdr, mode)) {
blk_put_request(rq);
return -EFAULT;
}
if (hdr->iovec_count) {
const int size = sizeof(struct sg_iovec) * hdr->iovec_count;
struct sg_iovec *iov;
iov = kmalloc(size, GFP_KERNEL);
if (!iov) {
ret = -ENOMEM;
goto out;
}
if (copy_from_user(iov, hdr->dxferp, size)) {
kfree(iov);
ret = -EFAULT;
goto out;
}
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, NULL, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL);
if (ret)
goto out;
bio = rq->bio;
memset(sense, 0, sizeof(sense));
rq->sense = sense;
rq->sense_len = 0;
rq->retries = 0;
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, 0);
hdr->duration = jiffies_to_msecs(jiffies - start_time);
return blk_complete_sghdr_rq(rq, hdr, bio);
out:
blk_put_request(rq);
return ret;
}
static int nvme_nvm_submit_user_cmd(struct request_queue *q,
struct nvme_ns *ns,
struct nvme_nvm_command *vcmd,
void __user *ubuf, unsigned int bufflen,
void __user *meta_buf, unsigned int meta_len,
void __user *ppa_buf, unsigned int ppa_len,
u32 *result, u64 *status, unsigned int timeout)
{
bool write = nvme_is_write((struct nvme_command *)vcmd);
struct nvm_dev *dev = ns->ndev;
struct gendisk *disk = ns->disk;
struct request *rq;
struct bio *bio = NULL;
__le64 *ppa_list = NULL;
dma_addr_t ppa_dma;
__le64 *metadata = NULL;
dma_addr_t metadata_dma;
DECLARE_COMPLETION_ONSTACK(wait);
int ret = 0;
rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
NVME_QID_ANY);
if (IS_ERR(rq)) {
ret = -ENOMEM;
goto err_cmd;
}
rq->timeout = timeout ? timeout : ADMIN_TIMEOUT;
if (ppa_buf && ppa_len) {
ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
if (!ppa_list) {
ret = -ENOMEM;
goto err_rq;
}
if (copy_from_user(ppa_list, (void __user *)ppa_buf,
sizeof(u64) * (ppa_len + 1))) {
ret = -EFAULT;
goto err_ppa;
}
vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
} else {
vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
}
if (ubuf && bufflen) {
ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
if (ret)
goto err_ppa;
bio = rq->bio;
if (meta_buf && meta_len) {
metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
&metadata_dma);
if (!metadata) {
ret = -ENOMEM;
goto err_map;
}
if (write) {
if (copy_from_user(metadata,
(void __user *)meta_buf,
meta_len)) {
ret = -EFAULT;
goto err_meta;
}
}
vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
}
bio->bi_disk = disk;
}
blk_execute_rq(q, NULL, rq, 0);
if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
ret = -EINTR;
else if (nvme_req(rq)->status & 0x7ff)
ret = -EIO;
if (result)
*result = nvme_req(rq)->status & 0x7ff;
if (status)
*status = le64_to_cpu(nvme_req(rq)->result.u64);
if (metadata && !ret && !write) {
if (copy_to_user(meta_buf, (void *)metadata, meta_len))
ret = -EFAULT;
}
err_meta:
if (meta_buf && meta_len)
dma_pool_free(dev->dma_pool, metadata, metadata_dma);
err_map:
if (bio)
blk_rq_unmap_user(bio);
err_ppa:
if (ppa_buf && ppa_len)
dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
err_rq:
blk_mq_free_request(rq);
err_cmd:
return ret;
}