* @major: the requested major device number [1..BLKDEV_MAJOR_MAX-1]. If
* @major = 0, try to allocate any unused major number.
* @name: the name of the new block device as a zero terminated string
- * @probe: allback that is called on access to any minor number of @major
+ * @probe: pre-devtmpfs / pre-udev callback used to create disks when their
+ * pre-created device node is accessed. When a probe call uses
+ * add_disk() and it fails the driver must cleanup resources. This
+ * interface may soon be removed.
*
* The @name must be unique within the system.
*
return 0;
}
-static DEFINE_MUTEX(ataflop_probe_lock);
-
static void ataflop_probe(dev_t dev)
{
int drive = MINOR(dev) & 3;
if (drive >= FD_MAX_UNITS || type >= NUM_DISK_MINORS)
return;
- mutex_lock(&ataflop_probe_lock);
- if (!unit[drive].disk[type]) {
- if (ataflop_alloc_disk(drive, type) == 0) {
- add_disk(unit[drive].disk[type]);
- unit[drive].registered[type] = true;
+ if (unit[drive].disk[type])
+ return;
+ if (ataflop_alloc_disk(drive, type))
+ return;
+ if (add_disk(unit[drive].disk[type]))
+ goto cleanup_disk;
+ unit[drive].registered[type] = true;
+ return;
+
+cleanup_disk:
+ blk_cleanup_disk(unit[drive].disk[type]);
+ unit[drive].disk[type] = NULL;
+}
+
+static void atari_floppy_cleanup(void)
+{
+ int i;
+ int type;
+
+ for (i = 0; i < FD_MAX_UNITS; i++) {
+ for (type = 0; type < NUM_DISK_MINORS; type++) {
+ if (!unit[i].disk[type])
+ continue;
+ del_gendisk(unit[i].disk[type]);
+ blk_cleanup_queue(unit[i].disk[type]->queue);
+ put_disk(unit[i].disk[type]);
}
+ blk_mq_free_tag_set(&unit[i].tag_set);
}
- mutex_unlock(&ataflop_probe_lock);
+
+ del_timer_sync(&fd_timer);
+ atari_stram_free(DMABuffer);
}
static void atari_cleanup_floppy_disk(struct atari_floppy_struct *fs)
/* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
return -ENODEV;
- mutex_lock(&ataflop_probe_lock);
- ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe);
- if (ret)
- goto out_unlock;
-
for (i = 0; i < FD_MAX_UNITS; i++) {
memset(&unit[i].tag_set, 0, sizeof(unit[i].tag_set));
unit[i].tag_set.ops = &ataflop_mq_ops;
UseTrackbuffer ? "" : "no ");
config_types();
- return 0;
+ ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe);
+ if (ret) {
+ printk(KERN_ERR "atari_floppy_init: cannot register block device\n");
+ atari_floppy_cleanup();
+ }
+ return ret;
err_out_dma:
atari_stram_free(DMABuffer);
while (--i >= 0)
atari_cleanup_floppy_disk(&unit[i]);
- unregister_blkdev(FLOPPY_MAJOR, "fd");
-out_unlock:
- mutex_unlock(&ataflop_probe_lock);
return ret;
}
static void __exit atari_floppy_exit(void)
{
- int i;
-
- for (i = 0; i < FD_MAX_UNITS; i++)
- atari_cleanup_floppy_disk(&unit[i]);
unregister_blkdev(FLOPPY_MAJOR, "fd");
-
- del_timer_sync(&fd_timer);
- atari_stram_free( DMABuffer );
+ atari_floppy_cleanup();
}
module_init(atari_floppy_init)
struct brd_device *brd;
struct gendisk *disk;
char buf[DISK_NAME_LEN];
+ int err = -ENOMEM;
mutex_lock(&brd_devices_mutex);
list_for_each_entry(brd, &brd_devices, brd_list) {
/* Tell the block layer that this is not a rotational device */
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, disk->queue);
- add_disk(disk);
+ err = add_disk(disk);
+ if (err)
+ goto out_cleanup_disk;
return 0;
+out_cleanup_disk:
+ blk_cleanup_disk(disk);
out_free_dev:
mutex_lock(&brd_devices_mutex);
list_del(&brd->brd_list);
mutex_unlock(&brd_devices_mutex);
kfree(brd);
- return -ENOMEM;
+ return err;
}
static void brd_probe(dev_t dev)
err = add_disk(disk);
if (err)
- goto out_cleanup_disk;
+ goto out_idr_remove_vol;
/* inherit the connection state */
device->state.conn = first_connection(resource)->cstate;
drbd_debugfs_device_add(device);
return NO_ERROR;
-out_cleanup_disk:
- blk_cleanup_disk(disk);
out_idr_remove_vol:
idr_remove(&connection->peer_devices, vnr);
out_idr_remove_from_resource:
return;
mutex_lock(&floppy_probe_lock);
- if (!disks[drive][type]) {
- if (floppy_alloc_disk(drive, type) == 0)
- add_disk(disks[drive][type]);
- }
+ if (disks[drive][type])
+ goto out;
+ if (floppy_alloc_disk(drive, type))
+ goto out;
+ if (add_disk(disks[drive][type]))
+ goto cleanup_disk;
+out:
+ mutex_unlock(&floppy_probe_lock);
+ return;
+
+cleanup_disk:
+ blk_cleanup_disk(disks[drive][type]);
+ disks[drive][type] = NULL;
mutex_unlock(&floppy_probe_lock);
}
goto out_free_dev;
i = err;
- err = -ENOMEM;
lo->tag_set.ops = &loop_mq_ops;
lo->tag_set.nr_hw_queues = 1;
lo->tag_set.queue_depth = 128;
mutex_lock(&nbd_index_mutex);
idr_remove(&nbd_index_idr, nbd->index);
mutex_unlock(&nbd_index_mutex);
-
+ destroy_workqueue(nbd->recv_workq);
kfree(nbd);
}
if (cmd->index != index) {
dev_err(disk_to_dev(nbd->disk), "Unexpected reply %d from different sock %d (expected %d)",
tag, index, cmd->index);
+ ret = -ENOENT;
+ goto out;
}
if (cmd->cmd_cookie != nbd_handle_to_cookie(handle)) {
dev_err(disk_to_dev(nbd->disk), "Double reply on req %p, cmd_cookie %u, handle cookie %u\n",
kfree(nbd->config);
nbd->config = NULL;
- if (nbd->recv_workq)
- destroy_workqueue(nbd->recv_workq);
- nbd->recv_workq = NULL;
-
nbd->tag_set.timeout = 0;
nbd->disk->queue->limits.discard_granularity = 0;
nbd->disk->queue->limits.discard_alignment = 0;
return -EINVAL;
}
- nbd->recv_workq = alloc_workqueue("knbd%d-recv",
- WQ_MEM_RECLAIM | WQ_HIGHPRI |
- WQ_UNBOUND, 0, nbd->index);
- if (!nbd->recv_workq) {
- dev_err(disk_to_dev(nbd->disk), "Could not allocate knbd recv work queue.\n");
- return -ENOMEM;
- }
-
blk_mq_update_nr_hw_queues(&nbd->tag_set, config->num_connections);
nbd->pid = task_pid_nr(current);
}
nbd->disk = disk;
+ nbd->recv_workq = alloc_workqueue("nbd%d-recv",
+ WQ_MEM_RECLAIM | WQ_HIGHPRI |
+ WQ_UNBOUND, 0, nbd->index);
+ if (!nbd->recv_workq) {
+ dev_err(disk_to_dev(nbd->disk), "Could not allocate knbd recv work queue.\n");
+ err = -ENOMEM;
+ goto out_err_disk;
+ }
+
/*
* Tell the block layer that we are not a rotational device
*/
disk->major = NBD_MAJOR;
/* Too big first_minor can cause duplicate creation of
- * sysfs files/links, since first_minor will be truncated to
- * byte in __device_add_disk().
+ * sysfs files/links, since index << part_shift might overflow, or
+ * MKDEV() expect that the max bits of first_minor is 20.
*/
disk->first_minor = index << part_shift;
- if (disk->first_minor > 0xff) {
+ if (disk->first_minor < index || disk->first_minor > MINORMASK) {
err = -EINVAL;
- goto out_free_idr;
+ goto out_free_work;
}
disk->minors = 1 << part_shift;
sprintf(disk->disk_name, "nbd%d", index);
err = add_disk(disk);
if (err)
- goto out_err_disk;
+ goto out_free_work;
/*
* Now publish the device.
nbd_total_devices++;
return nbd;
+out_free_work:
+ destroy_workqueue(nbd->recv_workq);
out_err_disk:
blk_cleanup_disk(disk);
out_free_idr:
nbd_disconnect(nbd);
sock_shutdown(nbd);
/*
- * Make sure recv thread has finished, so it does not drop the last
- * config ref and try to destroy the workqueue from inside the work
- * queue. And this also ensure that we can safely call nbd_clear_que()
+ * Make sure recv thread has finished, we can safely call nbd_clear_que()
* to cancel the inflight I/Os.
*/
- if (nbd->recv_workq)
- flush_workqueue(nbd->recv_workq);
+ flush_workqueue(nbd->recv_workq);
nbd_clear_que(nbd);
nbd->task_setup = NULL;
mutex_unlock(&nbd->config_lock);
gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
get_capacity(gendisk) >> 11);
- device_add_disk(&dev->sbd.core, gendisk, NULL);
- return 0;
+ error = device_add_disk(&dev->sbd.core, gendisk, NULL);
+ if (error)
+ goto fail_cleanup_disk;
+ return 0;
+fail_cleanup_disk:
+ blk_cleanup_disk(gendisk);
fail_free_tag_set:
blk_mq_free_tag_set(&priv->tag_set);
fail_teardown:
dev_info(&dev->core, "%s: Using %llu MiB of GPU memory\n",
gendisk->disk_name, get_capacity(gendisk) >> 11);
- device_add_disk(&dev->core, gendisk, NULL);
+ error = device_add_disk(&dev->core, gendisk, NULL);
+ if (error)
+ goto out_cleanup_disk;
+
return 0;
+out_cleanup_disk:
+ blk_cleanup_disk(gendisk);
out_cache_cleanup:
remove_proc_entry(DEVICE_NAME, NULL);
ps3vram_cache_cleanup(dev);
if (IS_ERR(g)) {
printk(KERN_ERR PFX "%s: Could not allocate gendisk.\n",
port->vio.name);
- blk_mq_free_tag_set(&port->tag_set);
- return PTR_ERR(g);
+ err = PTR_ERR(g);
+ goto out_free_tag;
}
port->disk = g;
port->vdisk_size, (port->vdisk_size >> (20 - 9)),
port->vio.ver.major, port->vio.ver.minor);
- device_add_disk(&port->vio.vdev->dev, g, NULL);
+ err = device_add_disk(&port->vio.vdev->dev, g, NULL);
+ if (err)
+ goto out_cleanup_disk;
return 0;
+
+out_cleanup_disk:
+ blk_cleanup_disk(g);
+out_free_tag:
+ blk_mq_free_tag_set(&port->tag_set);
+ return err;
}
static struct ldc_channel_config vdc_ldc_cfg = {
static int z2ram_register_disk(int minor)
{
struct gendisk *disk;
+ int err;
disk = blk_mq_alloc_disk(&tag_set, NULL);
if (IS_ERR(disk))
sprintf(disk->disk_name, "z2ram");
z2ram_gendisk[minor] = disk;
- add_disk(disk);
- return 0;
+ err = add_disk(disk);
+ if (err)
+ blk_cleanup_disk(disk);
+ return err;
}
static int __init z2_init(void)
set_capacity_and_notify(zram->disk, 0);
part_stat_set_all(zram->disk->part0, 0);
- up_write(&zram->init_lock);
/* I/O operation under all of CPU are done so let's free */
zram_meta_free(zram, disksize);
memset(&zram->stats, 0, sizeof(zram->stats));
zcomp_destroy(comp);
reset_bdev(zram);
+
+ up_write(&zram->init_lock);
}
static ssize_t disksize_store(struct device *dev,
mutex_unlock(&bdev->bd_disk->open_mutex);
/* Make sure all the pending I/O are finished */
- fsync_bdev(bdev);
+ sync_blockdev(bdev);
zram_reset_device(zram);
mutex_lock(&bdev->bd_disk->open_mutex);
blk_queue_max_write_zeroes_sectors(zram->disk->queue, UINT_MAX);
blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, zram->disk->queue);
- device_add_disk(NULL, zram->disk, zram_disk_attr_groups);
+ ret = device_add_disk(NULL, zram->disk, zram_disk_attr_groups);
+ if (ret)
+ goto out_cleanup_disk;
strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));
pr_info("Added device: %s\n", zram->disk->disk_name);
return device_id;
+out_cleanup_disk:
+ blk_cleanup_disk(zram->disk);
out_free_idr:
idr_remove(&zram_index_idr, device_id);
out_free_dev:
static int zram_remove(struct zram *zram)
{
struct block_device *bdev = zram->disk->part0;
+ bool claimed;
mutex_lock(&bdev->bd_disk->open_mutex);
- if (bdev->bd_openers || zram->claim) {
+ if (bdev->bd_openers) {
mutex_unlock(&bdev->bd_disk->open_mutex);
return -EBUSY;
}
- zram->claim = true;
+ claimed = zram->claim;
+ if (!claimed)
+ zram->claim = true;
mutex_unlock(&bdev->bd_disk->open_mutex);
zram_debugfs_unregister(zram);
- /* Make sure all the pending I/O are finished */
- fsync_bdev(bdev);
- zram_reset_device(zram);
+ if (claimed) {
+ /*
+ * If we were claimed by reset_store(), del_gendisk() will
+ * wait until reset_store() is done, so nothing need to do.
+ */
+ ;
+ } else {
+ /* Make sure all the pending I/O are finished */
+ sync_blockdev(bdev);
+ zram_reset_device(zram);
+ }
pr_info("Removed device: %s\n", zram->disk->disk_name);
del_gendisk(zram->disk);
+
+ /* del_gendisk drains pending reset_store */
+ WARN_ON_ONCE(claimed && zram->claim);
+
+ /*
+ * disksize_store() may be called in between zram_reset_device()
+ * and del_gendisk(), so run the last reset to avoid leaking
+ * anything allocated with disksize_store()
+ */
+ zram_reset_device(zram);
+
blk_cleanup_disk(zram->disk);
kfree(zram);
return 0;
static int zram_remove_cb(int id, void *ptr, void *data)
{
- zram_remove(ptr);
+ WARN_ON_ONCE(zram_remove(ptr));
return 0;
}
struct bvec_iter_all iter_all;
bio_for_each_segment_all(bv, b->bio, iter_all) {
- memcpy(bvec_virt(bv), addr, PAGE_SIZE);
+ memcpy(page_address(bv->bv_page), addr, PAGE_SIZE);
addr += PAGE_SIZE;
}
bcache_device_detach(d);
if (disk) {
- blk_cleanup_disk(disk);
ida_simple_remove(&bcache_device_idx,
first_minor_to_idx(disk->first_minor));
+ blk_cleanup_disk(disk);
}
bioset_exit(&d->bio_split);
{
unsigned long backlog;
unsigned long old_mwb = mddev->bitmap_info.max_write_behind;
+ struct md_rdev *rdev;
+ bool has_write_mostly = false;
int rv = kstrtoul(buf, 10, &backlog);
if (rv)
return rv;
if (backlog > COUNTER_MAX)
return -EINVAL;
+
+ /*
+ * Without write mostly device, it doesn't make sense to set
+ * backlog for max_write_behind.
+ */
+ rdev_for_each(rdev, mddev) {
+ if (test_bit(WriteMostly, &rdev->flags)) {
+ has_write_mostly = true;
+ break;
+ }
+ }
+ if (!has_write_mostly) {
+ pr_warn_ratelimited("%s: can't set backlog, no write mostly device available\n",
+ mdname(mddev));
+ return -EINVAL;
+ }
+
mddev->bitmap_info.max_write_behind = backlog;
if (!backlog && mddev->serial_info_pool) {
/* serial_info_pool is not needed if backlog is zero */
struct ppl_conf *ppl_conf = log->ppl_conf;
struct md_rdev *rdev = log->rdev;
struct mddev *mddev = rdev->mddev;
- struct page *page, *page2, *tmp;
+ struct page *page, *page2;
struct ppl_header *pplhdr = NULL, *prev_pplhdr = NULL;
u32 crc, crc_stored;
u32 signature;
prev_pplhdr_offset = pplhdr_offset;
prev_pplhdr = pplhdr;
- tmp = page;
- page = page2;
- page2 = tmp;
+ swap(page, page2);
/* calculate next potential ppl offset */
for (i = 0; i < le32_to_cpu(pplhdr->entries_count); i++)
list_add_tail(&dev->list, &ubiblock_devices);
/* Must be the last step: anyone can call file ops from now on */
- add_disk(dev->gd);
+ ret = add_disk(dev->gd);
+ if (ret)
+ goto out_destroy_wq;
+
dev_info(disk_to_dev(dev->gd), "created from ubi%d:%d(%s)",
dev->ubi_num, dev->vol_id, vi->name);
mutex_unlock(&devices_mutex);
return 0;
+out_destroy_wq:
+ list_del(&dev->list);
+ destroy_workqueue(dev->wq);
out_remove_minor:
idr_remove(&ubiblock_minor_idr, gd->first_minor);
out_cleanup_disk:
resource_size_t available_disk_size;
struct gendisk *disk;
u64 internal_nlba;
+ int rc;
internal_nlba = div_u64(nsblk->size, nsblk_internal_lbasize(nsblk));
available_disk_size = internal_nlba * nsblk_sector_size(nsblk);
blk_queue_logical_block_size(disk->queue, nsblk_sector_size(nsblk));
blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
- if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))
- return -ENOMEM;
-
if (nsblk_meta_size(nsblk)) {
- int rc = nd_integrity_init(disk, nsblk_meta_size(nsblk));
+ rc = nd_integrity_init(disk, nsblk_meta_size(nsblk));
if (rc)
- return rc;
+ goto out_before_devm_err;
}
set_capacity(disk, available_disk_size >> SECTOR_SHIFT);
- device_add_disk(dev, disk, NULL);
+ rc = device_add_disk(dev, disk, NULL);
+ if (rc)
+ goto out_before_devm_err;
+
+ /* nd_blk_release_disk() is called if this fails */
+ if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))
+ return -ENOMEM;
+
nvdimm_check_and_set_ro(disk);
return 0;
+
+out_before_devm_err:
+ blk_cleanup_disk(disk);
+ return rc;
}
static int nd_blk_probe(struct device *dev)
{
struct nd_btt *nd_btt = btt->nd_btt;
struct nd_namespace_common *ndns = nd_btt->ndns;
+ int rc = -ENOMEM;
btt->btt_disk = blk_alloc_disk(NUMA_NO_NODE);
if (!btt->btt_disk)
blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_disk->queue);
if (btt_meta_size(btt)) {
- int rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
-
- if (rc) {
- del_gendisk(btt->btt_disk);
- blk_cleanup_disk(btt->btt_disk);
- return rc;
- }
+ rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
+ if (rc)
+ goto out_cleanup_disk;
}
+
set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);
- device_add_disk(&btt->nd_btt->dev, btt->btt_disk, NULL);
+ rc = device_add_disk(&btt->nd_btt->dev, btt->btt_disk, NULL);
+ if (rc)
+ goto out_cleanup_disk;
+
btt->nd_btt->size = btt->nlba * (u64)btt->sector_size;
nvdimm_check_and_set_ro(btt->btt_disk);
return 0;
+
+out_cleanup_disk:
+ blk_cleanup_disk(btt->btt_disk);
+ return rc;
}
static void btt_blk_cleanup(struct btt *btt)
bb_range.end = res->end;
}
- if (IS_ERR(addr))
- return PTR_ERR(addr);
+ if (IS_ERR(addr)) {
+ rc = PTR_ERR(addr);
+ goto out;
+ }
pmem->virt_addr = addr;
blk_queue_write_cache(q, true, fua);
flags = DAXDEV_F_SYNC;
dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops, flags);
if (IS_ERR(dax_dev)) {
- return PTR_ERR(dax_dev);
+ rc = PTR_ERR(dax_dev);
+ goto out;
}
dax_write_cache(dax_dev, nvdimm_has_cache(nd_region));
pmem->dax_dev = dax_dev;
- device_add_disk(dev, disk, pmem_attribute_groups);
+ rc = device_add_disk(dev, disk, pmem_attribute_groups);
+ if (rc)
+ goto out_cleanup_dax;
if (devm_add_action_or_reset(dev, pmem_release_disk, pmem))
return -ENOMEM;
"badblocks");
if (!pmem->bb_state)
dev_warn(dev, "'badblocks' notification disabled\n");
-
return 0;
+
+out_cleanup_dax:
+ kill_dax(pmem->dax_dev);
+ put_dax(pmem->dax_dev);
+out:
+ blk_cleanup_disk(pmem->disk);
+ return rc;
}
static int nd_pmem_probe(struct device *dev)
projects / linux-2.6-microblaze.git / commitdiff