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path: root/drivers/block/loop.c
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Diffstat (limited to 'drivers/block/loop.c')
-rw-r--r--drivers/block/loop.c41
1 files changed, 22 insertions, 19 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 2f137d6ce169..d3394191e168 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -878,6 +878,7 @@ static void loop_config_discard(struct loop_device *lo)
struct file *file = lo->lo_backing_file;
struct inode *inode = file->f_mapping->host;
struct request_queue *q = lo->lo_queue;
+ u32 granularity, max_discard_sectors;
/*
* If the backing device is a block device, mirror its zeroing
@@ -890,11 +891,10 @@ static void loop_config_discard(struct loop_device *lo)
struct request_queue *backingq;
backingq = bdev_get_queue(inode->i_bdev);
- blk_queue_max_discard_sectors(q,
- backingq->limits.max_write_zeroes_sectors);
- blk_queue_max_write_zeroes_sectors(q,
- backingq->limits.max_write_zeroes_sectors);
+ max_discard_sectors = backingq->limits.max_write_zeroes_sectors;
+ granularity = backingq->limits.discard_granularity ?:
+ queue_physical_block_size(backingq);
/*
* We use punch hole to reclaim the free space used by the
@@ -903,23 +903,26 @@ static void loop_config_discard(struct loop_device *lo)
* useful information.
*/
} else if (!file->f_op->fallocate || lo->lo_encrypt_key_size) {
- q->limits.discard_granularity = 0;
- q->limits.discard_alignment = 0;
- blk_queue_max_discard_sectors(q, 0);
- blk_queue_max_write_zeroes_sectors(q, 0);
+ max_discard_sectors = 0;
+ granularity = 0;
} else {
- q->limits.discard_granularity = inode->i_sb->s_blocksize;
- q->limits.discard_alignment = 0;
-
- blk_queue_max_discard_sectors(q, UINT_MAX >> 9);
- blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> 9);
+ max_discard_sectors = UINT_MAX >> 9;
+ granularity = inode->i_sb->s_blocksize;
}
- if (q->limits.max_write_zeroes_sectors)
+ if (max_discard_sectors) {
+ q->limits.discard_granularity = granularity;
+ blk_queue_max_discard_sectors(q, max_discard_sectors);
+ blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
- else
+ } else {
+ q->limits.discard_granularity = 0;
+ blk_queue_max_discard_sectors(q, 0);
+ blk_queue_max_write_zeroes_sectors(q, 0);
blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
+ }
+ q->limits.discard_alignment = 0;
}
static void loop_unprepare_queue(struct loop_device *lo)
@@ -1111,8 +1114,6 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
mapping = file->f_mapping;
inode = mapping->host;
- size = get_loop_size(lo, file);
-
if ((config->info.lo_flags & ~LOOP_CONFIGURE_SETTABLE_FLAGS) != 0) {
error = -EINVAL;
goto out_unlock;
@@ -1162,6 +1163,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
loop_update_rotational(lo);
loop_update_dio(lo);
loop_sysfs_init(lo);
+
+ size = get_loop_size(lo, file);
loop_set_size(lo, size);
set_blocksize(bdev, S_ISBLK(inode->i_mode) ?
@@ -1719,7 +1722,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
case LOOP_SET_BLOCK_SIZE:
if (!(mode & FMODE_WRITE) && !capable(CAP_SYS_ADMIN))
return -EPERM;
- /* Fall through */
+ fallthrough;
default:
err = lo_simple_ioctl(lo, cmd, arg);
break;
@@ -1867,7 +1870,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
case LOOP_SET_STATUS64:
case LOOP_CONFIGURE:
arg = (unsigned long) compat_ptr(arg);
- /* fall through */
+ fallthrough;
case LOOP_SET_FD:
case LOOP_CHANGE_FD:
case LOOP_SET_BLOCK_SIZE: