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authorLukas Czerner <lczerner@redhat.com>2011-02-23 17:49:51 -0500
committerTheodore Ts'o <tytso@mit.edu>2011-02-23 17:49:51 -0500
commit5c2ed62fd447e2c696e222dcf71d1322bbbc58d4 (patch)
tree4ee089653fe84a9f21518a351b1ad06c8281011f /fs/ext4
parent4143179218960a70d821a425e3c23ce44aa93dee (diff)
downloadop-kernel-dev-5c2ed62fd447e2c696e222dcf71d1322bbbc58d4.zip
op-kernel-dev-5c2ed62fd447e2c696e222dcf71d1322bbbc58d4.tar.gz
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>
Diffstat (limited to 'fs/ext4')
-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 25ba7c7..c052c9f 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;
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