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Date: Mon, 31 Aug 2020 09:24:28 +0800 From: Chao Yu <yuchao0@...wei.com> To: Daeho Jeong <daeho43@...il.com>, Chao Yu <chao@...nel.org> CC: Daeho Jeong <daehojeong@...gle.com>, <kernel-team@...roid.com>, <linux-kernel@...r.kernel.org>, <linux-f2fs-devel@...ts.sourceforge.net> Subject: Re: [f2fs-dev] [PATCH] f2fs: prevent compressed file from being disabled after releasing cblocks On 2020/8/31 7:42, Daeho Jeong wrote: > Do you have any reason not to put this check here? No, the place is okay to me. :) > If we do this check outside of here, we definitely make a mistake > sooner or later. I just want to see whether we can cover all cases in where we missed to add immutable check condition if necessary. Thanks, > > 2020년 8월 30일 (일) 오후 12:24, Chao Yu <chao@...nel.org>님이 작성: >> >> On 2020-8-28 13:46, Daeho Jeong wrote: >>> From: Daeho Jeong <daehojeong@...gle.com> >>> >>> After releasing cblocks, the compressed file can be accidentally >>> disabled in compression mode, since it has zero cblocks. As we are >>> using IMMUTABLE flag to present released cblocks state, we can add >>> IMMUTABLE state check when considering the compressed file disabling. >>> >>> Signed-off-by: Daeho Jeong <daehojeong@...gle.com> >>> --- >>> fs/f2fs/f2fs.h | 2 ++ >>> 1 file changed, 2 insertions(+) >>> >>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h >>> index 02811ce15059..14d30740ba03 100644 >>> --- a/fs/f2fs/f2fs.h >>> +++ b/fs/f2fs/f2fs.h >>> @@ -3936,6 +3936,8 @@ static inline u64 f2fs_disable_compressed_file(struct inode *inode) >>> if (!f2fs_compressed_file(inode)) >>> return 0; >>> if (S_ISREG(inode->i_mode)) { >>> + if (IS_IMMUTABLE(inode)) >>> + return 1; >> >> It looks most of callers are from ioctl, should we add immutable check in f2fs >> ioctl interfaces if necessary? or I missed existed check. >> >> Thanks, >> >>> if (get_dirty_pages(inode)) >>> return 1; >>> if (fi->i_compr_blocks) >>> > > > _______________________________________________ > Linux-f2fs-devel mailing list > Linux-f2fs-devel@...ts.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel >
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