- Fix a particularly glaring oversight in a DM core commit from 5.1 that

doesn't properly trim special IOs (e.g. discards) relative to
   corresponding target's max_io_len_target_boundary().
 -----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEJfWUX4UqZ4x1O2wixSPxCi2dA1oFAlzkicQTHHNuaXR6ZXJA
 cmVkaGF0LmNvbQAKCRDFI/EKLZ0DWuRcCADKc4zew1EAhcHjwanfWoQ2d+5ONdxv
 Ir1yiQX3hqK96G1Vu4IROsxWPDgNBI+60HwWI0z3/nMdv4F9a9Tfowl9fcKgZNey
 jGrzP7x1+9GPtJY0BIpFUQ895qC75wXdd0c6HjmM5IaN0DRrv783ZMMBNhS6yx84
 2vDThiEpGiDKUXHTP9b1khUbZzvkpTmlk293UlkFDftgejfW5mq1FqbjLfACMNVI
 Nh7D6A7MjFrEKHjvNbiGgeFn93iW1+XqGbsFobuCV8Z4A0ImD85H78Lesri2qrRG
 nxGfTZMyq++SGSOV/JTzZ4k/qkZfkrDyljYiPaTgZpCi1mZYQ6wH8+7u
 =oKZ5
 -----END PGP SIGNATURE-----

Merge tag 'for-5.2/dm-fix-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper fix from Mike Snitzer:
 "Fix a particularly glaring oversight in a DM core commit from 5.1 that
  doesn't properly trim special IOs (e.g. discards) relative to
  corresponding target's max_io_len_target_boundary()"

* tag 'for-5.2/dm-fix-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: make sure to obey max_io_len_target_boundary
This commit is contained in:
Linus Torvalds 2019-05-22 08:10:35 -07:00
commit 86f9e56d08
1 changed files with 3 additions and 1 deletions

View File

@ -1469,7 +1469,7 @@ static unsigned get_num_write_zeroes_bios(struct dm_target *ti)
static int __send_changing_extent_only(struct clone_info *ci, struct dm_target *ti,
unsigned num_bios)
{
unsigned len = ci->sector_count;
unsigned len;
/*
* Even though the device advertised support for this type of
@ -1480,6 +1480,8 @@ static int __send_changing_extent_only(struct clone_info *ci, struct dm_target *
if (!num_bios)
return -EOPNOTSUPP;
len = min((sector_t)ci->sector_count, max_io_len_target_boundary(ci->sector, ti));
__send_duplicate_bios(ci, ti, num_bios, &len);
ci->sector += len;