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authorLukas Czerner <lczerner@redhat.com>2011-02-24 01:49:51 +0300
committerTheodore Ts'o <tytso@mit.edu>2011-02-24 01:49:51 +0300
commit5c2ed62fd447e2c696e222dcf71d1322bbbc58d4 (patch)
tree4ee089653fe84a9f21518a351b1ad06c8281011f
parent4143179218960a70d821a425e3c23ce44aa93dee (diff)
downloadlinux-5c2ed62fd447e2c696e222dcf71d1322bbbc58d4.tar.xz
ext4: Adjust minlen with discard_granularity in the FITRIM ioctl
Discard granularity tells us the minimum size of extent that can be discarded by the device. If the user supplies a minimum extent that should be discarded (range.minlen) which is smaller than the discard granularity, increase minlen to the discard granularity, since there's no point submitting trim requests that the device will reject anyway. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
-rw-r--r--fs/ext4/ioctl.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 25ba7c79d289..c052c9f0f3a1 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -348,6 +348,8 @@ mext_out:
sizeof(range)))
return -EFAULT;
+ range.minlen = max((unsigned int)range.minlen,
+ q->limits.discard_granularity);
ret = ext4_trim_fs(sb, &range);
if (ret < 0)
return ret;