diff options
| author | Josef Bacik <jbacik@fb.com> | 2016-12-02 16:19:12 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-21 09:31:23 +0200 |
| commit | 7599166d785552bd8b4abff6eb222fa9efc616fa (patch) | |
| tree | c33f3a875356a06da47fde2b00d2bf96ea573f47 | |
| parent | 9c0c4352726368fca2760b9b9a7d808ce86871c7 (diff) | |
nbd: use loff_t for blocksize and nbd_set_size args
commit ef77b515243b3499d62cf446eda6ca7e0a0b079c upstream.
If we have large devices (say like the 40t drive I was trying to test with) we
will end up overflowing the int arguments to nbd_set_size and not get the right
size for our device. Fix this by using loff_t everywhere so I don't have to
think about this again. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
[bwh: Backported to 4.9: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/block/nbd.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 7a1048755914..095b4589c2d5 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -54,7 +54,7 @@ struct nbd_device { struct mutex tx_lock; struct gendisk *disk; - int blksize; + loff_t blksize; loff_t bytesize; /* protects initialization and shutdown of the socket */ @@ -126,7 +126,7 @@ static void nbd_size_update(struct nbd_device *nbd, struct block_device *bdev) } static int nbd_size_set(struct nbd_device *nbd, struct block_device *bdev, - int blocksize, int nr_blocks) + loff_t blocksize, loff_t nr_blocks) { int ret; @@ -135,7 +135,7 @@ static int nbd_size_set(struct nbd_device *nbd, struct block_device *bdev, return ret; nbd->blksize = blocksize; - nbd->bytesize = (loff_t)blocksize * (loff_t)nr_blocks; + nbd->bytesize = blocksize * nr_blocks; nbd_size_update(nbd, bdev); @@ -817,7 +817,7 @@ static int nbd_dev_dbg_init(struct nbd_device *nbd) debugfs_create_file("tasks", 0444, dir, nbd, &nbd_dbg_tasks_ops); debugfs_create_u64("size_bytes", 0444, dir, &nbd->bytesize); debugfs_create_u32("timeout", 0444, dir, &nbd->tag_set.timeout); - debugfs_create_u32("blocksize", 0444, dir, &nbd->blksize); + debugfs_create_u64("blocksize", 0444, dir, &nbd->blksize); debugfs_create_file("flags", 0444, dir, nbd, &nbd_dbg_flags_ops); return 0; |