linux-kernel - [PATCH v2] f2fs: allow compression of files without blocks

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Date:   Thu,  7 Jul 2022 17:09:24 +0800
From:   Chao Liu <chaoliu719@...il.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Yue Hu <huyue2@...lpad.com>,
        Wayne Zhang <zhangwen@...lpad.com>,
        Chao Liu <liuchao@...lpad.com>
Subject: [PATCH v2] f2fs: allow compression of files without blocks

From: Chao Liu <liuchao@...lpad.com>

Files created by truncate(1) have a size but no blocks, so
they can be allowed to enable compression.

Signed-off-by: Chao Liu <liuchao@...lpad.com>
---
v2:
 - update commit message: truncate -> truncate(1)

 fs/f2fs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0f29af7876a6..f7a82858486a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1879,7 +1879,7 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
 		if (iflags & F2FS_COMPR_FL) {
 			if (!f2fs_may_compress(inode))
 				return -EINVAL;
-			if (S_ISREG(inode->i_mode) && inode->i_size)
+			if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode))
 				return -EINVAL;

 			set_compress_context(inode);
--
2.36.1