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f2fs: compress: don't {,de}compress non-full cluster 

f2fs won't compress non-full cluster in tail of file, let's skip
dirtying and rewrite such cluster during f2fs_ioc_{,de}compress_file.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2023-07-12 04:08:06 +08:00 committed by Jaegeuk Kim
parent 3a2c0e55f9
commit 025b3602b5
1 changed files with 8 additions and 12 deletions
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20
fs/f2fs/file.c
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@ -4092,10 +4092,8 @@ static int f2fs_ioc_decompress_file(struct file *filp)
last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
count = last_idx - page_idx;
while (count) {
int len = min(cluster_size, count);
ret = redirty_blocks(inode, page_idx, len);
while (count && count >= cluster_size) {
ret = redirty_blocks(inode, page_idx, cluster_size);
if (ret < 0)
break;
@ -4105,8 +4103,8 @@ static int f2fs_ioc_decompress_file(struct file *filp)
break;
}
count -= len;
page_idx += len;
count -= cluster_size;
page_idx += cluster_size;
cond_resched();
if (fatal_signal_pending(current)) {
@ -4172,10 +4170,8 @@ static int f2fs_ioc_compress_file(struct file *filp)
last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
count = last_idx - page_idx;
while (count) {
int len = min(cluster_size, count);
ret = redirty_blocks(inode, page_idx, len);
while (count && count >= cluster_size) {
ret = redirty_blocks(inode, page_idx, cluster_size);
if (ret < 0)
break;
@ -4185,8 +4181,8 @@ static int f2fs_ioc_compress_file(struct file *filp)
break;
}
count -= len;
page_idx += len;
count -= cluster_size;
page_idx += cluster_size;
cond_resched();
if (fatal_signal_pending(current)) {