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Message-ID: <YJlaz20Atq+TUnHu@google.com>
Date: Mon, 10 May 2021 09:09:51 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <yuchao0@...wei.com>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, chao@...nel.org
Subject: Re: [PATCH 3/3] f2fs: compress: fix to assign cc.cluster_idx
correctly
On 05/10, Chao Yu wrote:
> In f2fs_destroy_compress_ctx(), after f2fs_destroy_compress_ctx(),
> cc.cluster_idx will be cleared w/ NULL_CLUSTER, f2fs_cluster_blocks()
> may check wrong cluster metadata, fix it.
>
> Fixes: 4c8ff7095bef ("f2fs: support data compression")
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> ---
> fs/f2fs/compress.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> index 340815cd0887..30b003447510 100644
> --- a/fs/f2fs/compress.c
> +++ b/fs/f2fs/compress.c
> @@ -1066,6 +1066,8 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
> f2fs_put_rpages(cc);
> f2fs_unlock_rpages(cc, i + 1);
> f2fs_destroy_compress_ctx(cc);
> + cc->cluster_idx = index >>
> + F2FS_I(cc->inode)->i_log_cluster_size;
I didn't test tho, how about this?
>From 904abb77e82ea982f68960148b75d0a12f771c2e Mon Sep 17 00:00:00 2001
From: Chao Yu <yuchao0@...wei.com>
Date: Mon, 10 May 2021 17:30:32 +0800
Subject: [PATCH] f2fs: compress: fix to assign cc.cluster_idx correctly
In f2fs_destroy_compress_ctx(), after f2fs_destroy_compress_ctx(),
cc.cluster_idx will be cleared w/ NULL_CLUSTER, f2fs_cluster_blocks()
may check wrong cluster metadata, fix it.
Fixes: 4c8ff7095bef ("f2fs: support data compression")
Signed-off-by: Chao Yu <yuchao0@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/compress.c | 17 +++++++++--------
fs/f2fs/data.c | 6 +++---
2 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 79348bc56e35..925a5ca3744a 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -145,13 +145,14 @@ int f2fs_init_compress_ctx(struct compress_ctx *cc)
return cc->rpages ? 0 : -ENOMEM;
}
-void f2fs_destroy_compress_ctx(struct compress_ctx *cc)
+void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse)
{
page_array_free(cc->inode, cc->rpages, cc->cluster_size);
cc->rpages = NULL;
cc->nr_rpages = 0;
cc->nr_cpages = 0;
- cc->cluster_idx = NULL_CLUSTER;
+ if (!reuse)
+ cc->cluster_idx = NULL_CLUSTER;
}
void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page)
@@ -1034,7 +1035,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size,
&last_block_in_bio, false, true);
f2fs_put_rpages(cc);
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, true);
if (ret)
goto out;
if (bio)
@@ -1061,7 +1062,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
release_and_retry:
f2fs_put_rpages(cc);
f2fs_unlock_rpages(cc, i + 1);
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, true);
goto retry;
}
}
@@ -1094,7 +1095,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
unlock_pages:
f2fs_put_rpages(cc);
f2fs_unlock_rpages(cc, i);
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, true);
out:
return ret;
}
@@ -1130,7 +1131,7 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
set_cluster_dirty(&cc);
f2fs_put_rpages_wbc(&cc, NULL, false, 1);
- f2fs_destroy_compress_ctx(&cc);
+ f2fs_destroy_compress_ctx(&cc, false);
return first_index;
}
@@ -1350,7 +1351,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
f2fs_put_rpages(cc);
page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, false);
return 0;
out_destroy_crypt:
@@ -1512,7 +1513,7 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
err = f2fs_write_raw_pages(cc, submitted, wbc, io_type);
f2fs_put_rpages_wbc(cc, wbc, false, 0);
destroy_out:
- f2fs_destroy_compress_ctx(cc);
+ f2fs_destroy_compress_ctx(cc, false);
return err;
}
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 96f1a354f89f..33e56ae84e35 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2287,7 +2287,7 @@ static int f2fs_mpage_readpages(struct inode *inode,
max_nr_pages,
&last_block_in_bio,
rac != NULL, false);
- f2fs_destroy_compress_ctx(&cc);
+ f2fs_destroy_compress_ctx(&cc, false);
if (ret)
goto set_error_page;
}
@@ -2332,7 +2332,7 @@ static int f2fs_mpage_readpages(struct inode *inode,
max_nr_pages,
&last_block_in_bio,
rac != NULL, false);
- f2fs_destroy_compress_ctx(&cc);
+ f2fs_destroy_compress_ctx(&cc, false);
}
}
#endif
@@ -3033,7 +3033,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
}
}
if (f2fs_compressed_file(inode))
- f2fs_destroy_compress_ctx(&cc);
+ f2fs_destroy_compress_ctx(&cc, false);
#endif
if (retry) {
index = 0;
--
2.31.1.607.g51e8a6a459-goog
> goto retry;
> }
> }
> --
> 2.29.2
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