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f2fs: compress: fix to check zstd compress level correctly in mount option

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[ Upstream commit e39602da75 ]

f2fs only support to config zstd compress level w/ a positive number due
to layout design, but since commit e0c1b49f5b ("lib: zstd: Upgrade to
latest upstream zstd version 1.4.10"), zstd supports negative compress
level, so that zstd_min_clevel() may return a negative number, then w/
below mount option, .compress_level can be configed w/ a negative number,
which is not allowed to f2fs, let's add check condition to avoid it.

mount -o compress_algorithm=zstd:4294967295 /dev/sdx /mnt/f2fs

Fixes: 00e120b5e4 ("f2fs: assign default compression level")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2024-02-13 00:08:18 +08:00 committed by Sasha Levin
parent 7525dec4b3
commit 9deb2010aa
1 changed files with 8 additions and 2 deletions
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10
fs/f2fs/super.c
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@ -648,7 +648,7 @@ static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
#ifdef CONFIG_F2FS_FS_ZSTD
static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
{
unsigned int level;
int level;
int len = 4;
if (strlen(str) == len) {
@ -662,9 +662,15 @@ static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
return -EINVAL;
}
if (kstrtouint(str + 1, 10, &level))
if (kstrtoint(str + 1, 10, &level))
return -EINVAL;
/* f2fs does not support negative compress level now */
if (level < 0) {
f2fs_info(sbi, "do not support negative compress level: %d", level);
return -ERANGE;
}
if (!f2fs_is_compress_level_valid(COMPRESS_ZSTD, level)) {
f2fs_info(sbi, "invalid zstd compress level: %d", level);
return -EINVAL;