[RFC PATCH 03/16] DM: Error if enough space is not available.
From: Ram Pai <hidden>
Date: 2016-08-15 17:37:38
Also in:
dm-devel, lkml
Subsystem:
device-mapper (lvm), the rest · Maintainers:
Alasdair Kergon, Mike Snitzer, Mikulas Patocka, Benjamin Marzinski, Linus Torvalds
if enough space is not available to create a block of the specified size error out. Signed-off-by: Ram Pai <redacted> --- drivers/md/dm-inplace-compress.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/md/dm-inplace-compress.c b/drivers/md/dm-inplace-compress.c
index 70d6c0e..17221a1 100644
--- a/drivers/md/dm-inplace-compress.c
+++ b/drivers/md/dm-inplace-compress.c@@ -453,6 +453,12 @@ static int dm_icomp_read_or_create_super(struct dm_icomp_info *info) info->data_blocks = data_blocks; info->data_start = (1 + meta_blocks) << DMCP_BLOCK_SECTOR_SHIFT; + if ((data_blocks << DMCP_BLOCK_SECTOR_SHIFT) < info->ti->len) { + info->ti->error = + "Insufficient sectors to satisfy requested size"; + return -ENOMEM; + } + addr = kzalloc(DMCP_BLOCK_SIZE, GFP_KERNEL); if (!addr) { info->ti->error = "Cannot allocate super";
--
1.7.1