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Date: Wed, 31 Aug 2022 14:05:09 +0200
From: Jan Kara <jack@...e.cz>
To: Jason Yan <yanaijie@...wei.com>
Cc: tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
ritesh.list@...il.com, lczerner@...hat.com,
linux-ext4@...r.kernel.org
Subject: Re: [PATCH 12/13] ext4: factor out ext4_load_and_init_journal()
On Tue 30-08-22 20:04:10, Jason Yan wrote:
> This patch group the journal load and initialize code together and
> factor out ext4_load_and_init_journal(). This patch also removes the
> lable 'no_journal' which is not needed after refactor.
>
> Signed-off-by: Jason Yan <yanaijie@...wei.com>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@...e.cz>
Honza
> ---
> fs/ext4/super.c | 157 +++++++++++++++++++++++++++---------------------
> 1 file changed, 88 insertions(+), 69 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 40f155543df0..95e70f0316db 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -4823,6 +4823,93 @@ static int ext4_group_desc_init(struct super_block *sb,
> return ret;
> }
>
> +static int ext4_load_and_init_journal(struct super_block *sb,
> + struct ext4_super_block *es,
> + struct ext4_fs_context *ctx)
> +{
> + struct ext4_sb_info *sbi = EXT4_SB(sb);
> + int err;
> +
> + err = ext4_load_journal(sb, es, ctx->journal_devnum);
> + if (err)
> + return err;
> +
> + if (ext4_has_feature_64bit(sb) &&
> + !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
> + JBD2_FEATURE_INCOMPAT_64BIT)) {
> + ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");
> + goto out;
> + }
> +
> + if (!set_journal_csum_feature_set(sb)) {
> + ext4_msg(sb, KERN_ERR, "Failed to set journal checksum "
> + "feature set");
> + goto out;
> + }
> +
> + if (test_opt2(sb, JOURNAL_FAST_COMMIT) &&
> + !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
> + JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) {
> + ext4_msg(sb, KERN_ERR,
> + "Failed to set fast commit journal feature");
> + goto out;
> + }
> +
> + /* We have now updated the journal if required, so we can
> + * validate the data journaling mode. */
> + switch (test_opt(sb, DATA_FLAGS)) {
> + case 0:
> + /* No mode set, assume a default based on the journal
> + * capabilities: ORDERED_DATA if the journal can
> + * cope, else JOURNAL_DATA
> + */
> + if (jbd2_journal_check_available_features
> + (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
> + set_opt(sb, ORDERED_DATA);
> + sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;
> + } else {
> + set_opt(sb, JOURNAL_DATA);
> + sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;
> + }
> + break;
> +
> + case EXT4_MOUNT_ORDERED_DATA:
> + case EXT4_MOUNT_WRITEBACK_DATA:
> + if (!jbd2_journal_check_available_features
> + (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
> + ext4_msg(sb, KERN_ERR, "Journal does not support "
> + "requested data journaling mode");
> + goto out;
> + }
> + break;
> + default:
> + break;
> + }
> +
> + if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA &&
> + test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
> + ext4_msg(sb, KERN_ERR, "can't mount with "
> + "journal_async_commit in data=ordered mode");
> + goto out;
> + }
> +
> + set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);
> +
> + sbi->s_journal->j_submit_inode_data_buffers =
> + ext4_journal_submit_inode_data_buffers;
> + sbi->s_journal->j_finish_inode_data_buffers =
> + ext4_journal_finish_inode_data_buffers;
> +
> + return 0;
> +
> +out:
> + /* flush s_error_work before journal destroy. */
> + flush_work(&sbi->s_error_work);
> + jbd2_journal_destroy(sbi->s_journal);
> + sbi->s_journal = NULL;
> + return err;
> +}
> +
> static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
> {
> struct buffer_head *bh;
> @@ -5182,7 +5269,7 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
> * root first: it may be modified in the journal!
> */
> if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) {
> - err = ext4_load_journal(sb, es, ctx->journal_devnum);
> + err = ext4_load_and_init_journal(sb, es, ctx);
> if (err)
> goto failed_mount3a;
> } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) &&
> @@ -5220,76 +5307,8 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
> clear_opt2(sb, JOURNAL_FAST_COMMIT);
> sbi->s_journal = NULL;
> needs_recovery = 0;
> - goto no_journal;
> }
>
> - if (ext4_has_feature_64bit(sb) &&
> - !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
> - JBD2_FEATURE_INCOMPAT_64BIT)) {
> - ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature");
> - goto failed_mount_wq;
> - }
> -
> - if (!set_journal_csum_feature_set(sb)) {
> - ext4_msg(sb, KERN_ERR, "Failed to set journal checksum "
> - "feature set");
> - goto failed_mount_wq;
> - }
> -
> - if (test_opt2(sb, JOURNAL_FAST_COMMIT) &&
> - !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
> - JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) {
> - ext4_msg(sb, KERN_ERR,
> - "Failed to set fast commit journal feature");
> - goto failed_mount_wq;
> - }
> -
> - /* We have now updated the journal if required, so we can
> - * validate the data journaling mode. */
> - switch (test_opt(sb, DATA_FLAGS)) {
> - case 0:
> - /* No mode set, assume a default based on the journal
> - * capabilities: ORDERED_DATA if the journal can
> - * cope, else JOURNAL_DATA
> - */
> - if (jbd2_journal_check_available_features
> - (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
> - set_opt(sb, ORDERED_DATA);
> - sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA;
> - } else {
> - set_opt(sb, JOURNAL_DATA);
> - sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA;
> - }
> - break;
> -
> - case EXT4_MOUNT_ORDERED_DATA:
> - case EXT4_MOUNT_WRITEBACK_DATA:
> - if (!jbd2_journal_check_available_features
> - (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) {
> - ext4_msg(sb, KERN_ERR, "Journal does not support "
> - "requested data journaling mode");
> - goto failed_mount_wq;
> - }
> - break;
> - default:
> - break;
> - }
> -
> - if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA &&
> - test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
> - ext4_msg(sb, KERN_ERR, "can't mount with "
> - "journal_async_commit in data=ordered mode");
> - goto failed_mount_wq;
> - }
> -
> - set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio);
> -
> - sbi->s_journal->j_submit_inode_data_buffers =
> - ext4_journal_submit_inode_data_buffers;
> - sbi->s_journal->j_finish_inode_data_buffers =
> - ext4_journal_finish_inode_data_buffers;
> -
> -no_journal:
> if (!test_opt(sb, NO_MBCACHE)) {
> sbi->s_ea_block_cache = ext4_xattr_create_cache();
> if (!sbi->s_ea_block_cache) {
> --
> 2.31.1
>
--
Jan Kara <jack@...e.com>
SUSE Labs, CR
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