On 5/8/25 4:19 AM, Chao Yu wrote:
>> @@ -2645,21 +2603,11 @@ static int f2fs_remount(struct super_block *sb, int
>> *flags, char *data)
>>
>> default_options(sbi, true);
>>
>> - memset(&fc, 0, sizeof(fc));
>> - memset(&ctx, 0, sizeof(ctx));
>> - fc.fs_private = &ctx;
>> - fc.purpose = FS_CONTEXT_FOR_RECONFIGURE;
>> -
>> - /* parse mount options */
>> - err = parse_options(&fc, data);
>> - if (err)
>> - goto restore_opts;
> There is a retry flow during f2fs_fill_super(), I intenionally inject a
> fault into f2fs_fill_super() to trigger the retry flow, it turns out that
> mount option may be missed w/ below testcase:
I never did understand that retry logic (introduced in ed2e621a95d long
ago). What errors does it expect to be able to retry, with success?
Anyway ...
Can you show me (as a patch) exactly what you did to trigger the retry,
just so we are looking at the same thing?
> - mkfs.f2fs -f -O encrypt /dev/vdb
> - mount -o test_dummy_encryption /dev/vdb /mnt/f2fs/
> : return success
> - dmesg -c
>
> [ 83.619982] f2fs_fill_super, retry_cnt:1
> [ 83.620914] F2FS-fs (vdb): Test dummy encryption mode enabled
> [ 83.668380] f2fs_fill_super, retry_cnt:0
> [ 83.671601] F2FS-fs (vdb): Mounted with checkpoint version = 7a8dfca5
>
> - mount|grep f2fs
> /dev/vdb on /mnt/f2fs type f2fs
> (rw,relatime,lazytime,background_gc=on,nogc_merge,
> discard,discard_unit=block,user_xattr,inline_xattr,acl,inline_data,inline_dentry,
> flush_merge,barrier,extent_cache,mode=adaptive,active_logs=6,alloc_mode=reuse,
> checkpoint_merge,fsync_mode=posix,memory=normal,errors=continue)
>
> The reason may be it has cleared F2FS_CTX_INFO(ctx).dummy_enc_policy in
> f2fs_apply_test_dummy_encryption().
>
> static void f2fs_apply_test_dummy_encryption(struct fs_context *fc,
> struct super_block *sb)
> {
> struct f2fs_fs_context *ctx = fc->fs_private;
> struct f2fs_sb_info *sbi = F2FS_SB(sb);
>
> if (!fscrypt_is_dummy_policy_set(&F2FS_CTX_INFO(ctx).dummy_enc_policy)
> ||
> /* if already set, it was already verified to be the same */
> fscrypt_is_dummy_policy_set(&F2FS_OPTION(sbi).dummy_enc_policy))
> return;
> F2FS_OPTION(sbi).dummy_enc_policy = F2FS_CTX_INFO(ctx).dummy_enc_policy;
> memset(&F2FS_CTX_INFO(ctx).dummy_enc_policy, 0,
> sizeof(F2FS_CTX_INFO(ctx).dummy_enc_policy));
> f2fs_warn(sbi, "Test dummy encryption mode enabled");
> }
>
> Can we save old mount_info from sbi or ctx from fc, and try to recover it
> before we retry mount flow?
I'll have to take more time to understand this concern. But thanks for pointing
it out.
-Eric
> Thanks,
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