static MAKE_REQUEST_FN_RET
zvol_request(struct request_queue *q, struct bio *bio)
{
zvol_state_t *zv = q->queuedata;
fstrans_cookie_t cookie = spl_fstrans_mark();
uint64_t offset = BIO_BI_SECTOR(bio);
unsigned int sectors = bio_sectors(bio);
int rw = bio_data_dir(bio);
#ifdef HAVE_GENERIC_IO_ACCT
unsigned long start = jiffies;
#endif
int error = 0;
if (bio_has_data(bio) && offset + sectors >
get_capacity(zv->zv_disk)) {
printk(KERN_INFO
"%s: bad access: block=%llu, count=%lu\n",
zv->zv_disk->disk_name,
(long long unsigned)offset,
(long unsigned)sectors);
error = SET_ERROR(EIO);
goto out1;
}
generic_start_io_acct(rw, sectors, &zv->zv_disk->part0);
if (rw == WRITE) {
if (unlikely(zv->zv_flags & ZVOL_RDONLY)) {
error = SET_ERROR(EROFS);
goto out2;
}
if (bio->bi_rw & VDEV_REQ_DISCARD) {
error = zvol_discard(bio);
goto out2;
}
error = zvol_write(bio);
} else
error = zvol_read(bio);
out2:
generic_end_io_acct(rw, &zv->zv_disk->part0, start);
out1:
BIO_END_IO(bio, -error);
spl_fstrans_unmark(cookie);
#ifdef HAVE_MAKE_REQUEST_FN_RET_INT
return (0);
#elif defined(HAVE_MAKE_REQUEST_FN_RET_QC)
return (BLK_QC_T_NONE);
#endif
}
static MAKE_REQUEST_FN_RET
zvol_request(struct request_queue *q, struct bio *bio)
{
uio_t uio;
zvol_state_t *zv = q->queuedata;
fstrans_cookie_t cookie = spl_fstrans_mark();
int rw = bio_data_dir(bio);
#ifdef HAVE_GENERIC_IO_ACCT
unsigned long start = jiffies;
#endif
int error = 0;
uio.uio_bvec = &bio->bi_io_vec[BIO_BI_IDX(bio)];
uio.uio_skip = BIO_BI_SKIP(bio);
uio.uio_resid = BIO_BI_SIZE(bio);
uio.uio_iovcnt = bio->bi_vcnt - BIO_BI_IDX(bio);
uio.uio_loffset = BIO_BI_SECTOR(bio) << 9;
uio.uio_limit = MAXOFFSET_T;
uio.uio_segflg = UIO_BVEC;
if (bio_has_data(bio) && uio.uio_loffset + uio.uio_resid >
zv->zv_volsize) {
printk(KERN_INFO
"%s: bad access: offset=%llu, size=%lu\n",
zv->zv_disk->disk_name,
(long long unsigned)uio.uio_loffset,
(long unsigned)uio.uio_resid);
error = SET_ERROR(EIO);
goto out1;
}
generic_start_io_acct(rw, bio_sectors(bio), &zv->zv_disk->part0);
if (rw == WRITE) {
if (unlikely(zv->zv_flags & ZVOL_RDONLY)) {
error = SET_ERROR(EROFS);
goto out2;
}
if (bio_is_discard(bio) || bio_is_secure_erase(bio)) {
error = zvol_discard(bio);
goto out2;
}
/*
* Some requests are just for flush and nothing else.
*/
if (uio.uio_resid == 0) {
if (bio_is_flush(bio))
zil_commit(zv->zv_zilog, ZVOL_OBJ);
goto out2;
}
error = zvol_write(zv, &uio,
bio_is_flush(bio) || bio_is_fua(bio) ||
zv->zv_objset->os_sync == ZFS_SYNC_ALWAYS);
} else
error = zvol_read(zv, &uio);
out2:
generic_end_io_acct(rw, &zv->zv_disk->part0, start);
out1:
BIO_END_IO(bio, -error);
spl_fstrans_unmark(cookie);
#ifdef HAVE_MAKE_REQUEST_FN_RET_INT
return (0);
#elif defined(HAVE_MAKE_REQUEST_FN_RET_QC)
return (BLK_QC_T_NONE);
#endif
}
