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-rw-r--r--block/genhd.c160
1 files changed, 91 insertions, 69 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 99c64641c314..0a273211fec2 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -50,14 +50,13 @@ static void disk_release_events(struct gendisk *disk);
* zero and will not be set to zero
*/
void set_capacity_revalidate_and_notify(struct gendisk *disk, sector_t size,
- bool revalidate)
+ bool update_bdev)
{
sector_t capacity = get_capacity(disk);
set_capacity(disk, size);
-
- if (revalidate)
- revalidate_disk(disk);
+ if (update_bdev)
+ revalidate_disk_size(disk, true);
if (capacity != size && capacity != 0 && size != 0) {
char *envp[] = { "RESIZE=1", NULL };
@@ -86,7 +85,7 @@ char *disk_name(struct gendisk *hd, int partno, char *buf)
const char *bdevname(struct block_device *bdev, char *buf)
{
- return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf);
+ return disk_name(bdev->bd_disk, bdev->bd_partno, buf);
}
EXPORT_SYMBOL(bdevname);
@@ -110,8 +109,7 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
}
}
-static unsigned int part_in_flight(struct request_queue *q,
- struct hd_struct *part)
+static unsigned int part_in_flight(struct hd_struct *part)
{
unsigned int inflight = 0;
int cpu;
@@ -126,8 +124,7 @@ static unsigned int part_in_flight(struct request_queue *q,
return inflight;
}
-static void part_in_flight_rw(struct request_queue *q, struct hd_struct *part,
- unsigned int inflight[2])
+static void part_in_flight_rw(struct hd_struct *part, unsigned int inflight[2])
{
int cpu;
@@ -676,11 +673,23 @@ static int exact_lock(dev_t devt, void *data)
return 0;
}
+static void disk_scan_partitions(struct gendisk *disk)
+{
+ struct block_device *bdev;
+
+ if (!get_capacity(disk) || !disk_part_scan_enabled(disk))
+ return;
+
+ set_bit(GD_NEED_PART_SCAN, &disk->state);
+ bdev = blkdev_get_by_dev(disk_devt(disk), FMODE_READ, NULL);
+ if (!IS_ERR(bdev))
+ blkdev_put(bdev, FMODE_READ);
+}
+
static void register_disk(struct device *parent, struct gendisk *disk,
const struct attribute_group **groups)
{
struct device *ddev = disk_to_dev(disk);
- struct block_device *bdev;
struct disk_part_iter piter;
struct hd_struct *part;
int err;
@@ -722,25 +731,8 @@ static void register_disk(struct device *parent, struct gendisk *disk,
return;
}
- /* No minors to use for partitions */
- if (!disk_part_scan_enabled(disk))
- goto exit;
+ disk_scan_partitions(disk);
- /* No such device (e.g., media were just removed) */
- if (!get_capacity(disk))
- goto exit;
-
- bdev = bdget_disk(disk, 0);
- if (!bdev)
- goto exit;
-
- bdev->bd_invalidated = 1;
- err = blkdev_get(bdev, FMODE_READ, NULL);
- if (err < 0)
- goto exit;
- blkdev_put(bdev, FMODE_READ);
-
-exit:
/* announce disk after possible partitions are created */
dev_set_uevent_suppress(ddev, 0);
kobject_uevent(&ddev->kobj, KOBJ_ADD);
@@ -913,7 +905,7 @@ void del_gendisk(struct gendisk *disk)
DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
while ((part = disk_part_iter_next(&piter))) {
invalidate_partition(disk, part->partno);
- delete_partition(disk, part);
+ delete_partition(part);
}
disk_part_iter_exit(&piter);
@@ -1056,7 +1048,7 @@ struct block_device *bdget_disk(struct gendisk *disk, int partno)
part = disk_get_part(disk, partno);
if (part)
- bdev = bdget(part_devt(part));
+ bdev = bdget_part(part);
disk_put_part(part);
return bdev;
@@ -1301,7 +1293,7 @@ ssize_t part_stat_show(struct device *dev,
if (queue_is_mq(q))
inflight = blk_mq_in_flight(q, p);
else
- inflight = part_in_flight(q, p);
+ inflight = part_in_flight(p);
return sprintf(buf,
"%8lu %8lu %8llu %8u "
@@ -1343,7 +1335,7 @@ ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
if (queue_is_mq(q))
blk_mq_in_flight_rw(q, p, inflight);
else
- part_in_flight_rw(q, p, inflight);
+ part_in_flight_rw(p, inflight);
return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
@@ -1623,7 +1615,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
if (queue_is_mq(gp->queue))
inflight = blk_mq_in_flight(gp->queue, hd);
else
- inflight = part_in_flight(gp->queue, hd);
+ inflight = part_in_flight(hd);
seq_printf(seqf, "%4d %7d %s "
"%lu %lu %lu %u "
@@ -1729,45 +1721,48 @@ struct gendisk *__alloc_disk_node(int minors, int node_id)
}
disk = kzalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
- if (disk) {
- disk->part0.dkstats = alloc_percpu(struct disk_stats);
- if (!disk->part0.dkstats) {
- kfree(disk);
- return NULL;
- }
- init_rwsem(&disk->lookup_sem);
- disk->node_id = node_id;
- if (disk_expand_part_tbl(disk, 0)) {
- free_percpu(disk->part0.dkstats);
- kfree(disk);
- return NULL;
- }
- ptbl = rcu_dereference_protected(disk->part_tbl, 1);
- rcu_assign_pointer(ptbl->part[0], &disk->part0);
+ if (!disk)
+ return NULL;
- /*
- * set_capacity() and get_capacity() currently don't use
- * seqcounter to read/update the part0->nr_sects. Still init
- * the counter as we can read the sectors in IO submission
- * patch using seqence counters.
- *
- * TODO: Ideally set_capacity() and get_capacity() should be
- * converted to make use of bd_mutex and sequence counters.
- */
- hd_sects_seq_init(&disk->part0);
- if (hd_ref_init(&disk->part0)) {
- hd_free_part(&disk->part0);
- kfree(disk);
- return NULL;
- }
+ disk->part0.dkstats = alloc_percpu(struct disk_stats);
+ if (!disk->part0.dkstats)
+ goto out_free_disk;
- disk->minors = minors;
- rand_initialize_disk(disk);
- disk_to_dev(disk)->class = &block_class;
- disk_to_dev(disk)->type = &disk_type;
- device_initialize(disk_to_dev(disk));
+ init_rwsem(&disk->lookup_sem);
+ disk->node_id = node_id;
+ if (disk_expand_part_tbl(disk, 0)) {
+ free_percpu(disk->part0.dkstats);
+ goto out_free_disk;
}
+
+ ptbl = rcu_dereference_protected(disk->part_tbl, 1);
+ rcu_assign_pointer(ptbl->part[0], &disk->part0);
+
+ /*
+ * set_capacity() and get_capacity() currently don't use
+ * seqcounter to read/update the part0->nr_sects. Still init
+ * the counter as we can read the sectors in IO submission
+ * patch using seqence counters.
+ *
+ * TODO: Ideally set_capacity() and get_capacity() should be
+ * converted to make use of bd_mutex and sequence counters.
+ */
+ hd_sects_seq_init(&disk->part0);
+ if (hd_ref_init(&disk->part0))
+ goto out_free_part0;
+
+ disk->minors = minors;
+ rand_initialize_disk(disk);
+ disk_to_dev(disk)->class = &block_class;
+ disk_to_dev(disk)->type = &disk_type;
+ device_initialize(disk_to_dev(disk));
return disk;
+
+out_free_part0:
+ hd_free_part(&disk->part0);
+out_free_disk:
+ kfree(disk);
+ return NULL;
}
EXPORT_SYMBOL(__alloc_disk_node);
@@ -2052,7 +2047,7 @@ void disk_flush_events(struct gendisk *disk, unsigned int mask)
* CONTEXT:
* Might sleep.
*/
-unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
+static unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
{
struct disk_events *ev = disk->ev;
unsigned int pending;
@@ -2090,6 +2085,33 @@ unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
return pending;
}
+/**
+ * bdev_check_media_change - check if a removable media has been changed
+ * @bdev: block device to check
+ *
+ * Check whether a removable media has been changed, and attempt to free all
+ * dentries and inodes and invalidates all block device page cache entries in
+ * that case.
+ *
+ * Returns %true if the block device changed, or %false if not.
+ */
+bool bdev_check_media_change(struct block_device *bdev)
+{
+ unsigned int events;
+
+ events = disk_clear_events(bdev->bd_disk, DISK_EVENT_MEDIA_CHANGE |
+ DISK_EVENT_EJECT_REQUEST);
+ if (!(events & DISK_EVENT_MEDIA_CHANGE))
+ return false;
+
+ if (__invalidate_device(bdev, true))
+ pr_warn("VFS: busy inodes on changed media %s\n",
+ bdev->bd_disk->disk_name);
+ set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
+ return true;
+}
+EXPORT_SYMBOL(bdev_check_media_change);
+
/*
* Separate this part out so that a different pointer for clearing_ptr can be
* passed in for disk_clear_events.
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 23:28:31 +0100