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authorJaegeuk Kim <jaegeuk@kernel.org>2014-06-13 13:07:31 +0900
committerJaegeuk Kim <jaegeuk@kernel.org>2014-06-23 10:05:08 +0900
commit98397ff3cddcfdedd2ba1701bd30a73c1d733769 (patch)
tree2f3180fcfe2057df1c849482cebd7d1b6fe1c179 /fs/f2fs
parentead432756ab2c76b1f1de742a1c8a06992cb98eb (diff)
downloadop-kernel-dev-98397ff3cddcfdedd2ba1701bd30a73c1d733769.zip
op-kernel-dev-98397ff3cddcfdedd2ba1701bd30a73c1d733769.tar.gz
f2fs: fix not to allocate unnecessary blocks during fallocate
This patch fixes the fallocate bug like below. (See xfstests/255) In fallocate(fd, 0, 20480), expand_inode_data processes for (index = pg_start; index <= pg_end; index++) { f2fs_reserve_block(); ... } So, even though fallocate requests 20480, 5 blocks, f2fs allocates 6 blocks including pg_end. So, this patch adds one condition to avoid block allocation. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/file.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f6c4bda..7d8b962 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -664,11 +664,14 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
for (index = pg_start; index <= pg_end; index++) {
struct dnode_of_data dn;
+ if (index == pg_end && !off_end)
+ goto noalloc;
+
set_new_dnode(&dn, inode, NULL, NULL, 0);
ret = f2fs_reserve_block(&dn, index);
if (ret)
break;
-
+noalloc:
if (pg_start == pg_end)
new_size = offset + len;
else if (index == pg_start && off_start)
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