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Date: Wed, 31 Aug 2022 13:49:25 +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 06/13] ext4: factor out ext4_inode_info_init()
On Tue 30-08-22 20:04:04, Jason Yan wrote:
> Factor out ext4_inode_info_init(). No functional change.
>
> 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 | 137 ++++++++++++++++++++++++++----------------------
> 1 file changed, 75 insertions(+), 62 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index d355eda2f184..458d146149b2 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -4448,6 +4448,79 @@ static void ext4_fast_commit_init(struct super_block *sb)
> sbi->s_fc_replay_state.fc_modified_inodes_used = 0;
> }
>
> +static int ext4_inode_info_init(struct super_block *sb,
> + struct ext4_super_block *es,
> + int blocksize)
> +{
> + struct ext4_sb_info *sbi = EXT4_SB(sb);
> +
> + if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {
> + sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;
> + sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;
> + } else {
> + sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
> + sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
> + if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) {
> + ext4_msg(sb, KERN_ERR, "invalid first ino: %u",
> + sbi->s_first_ino);
> + return -EINVAL;
> + }
> + if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||
> + (!is_power_of_2(sbi->s_inode_size)) ||
> + (sbi->s_inode_size > blocksize)) {
> + ext4_msg(sb, KERN_ERR,
> + "unsupported inode size: %d",
> + sbi->s_inode_size);
> + ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize);
> + return -EINVAL;
> + }
> + /*
> + * i_atime_extra is the last extra field available for
> + * [acm]times in struct ext4_inode. Checking for that
> + * field should suffice to ensure we have extra space
> + * for all three.
> + */
> + if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +
> + sizeof(((struct ext4_inode *)0)->i_atime_extra)) {
> + sb->s_time_gran = 1;
> + sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;
> + } else {
> + sb->s_time_gran = NSEC_PER_SEC;
> + sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;
> + }
> + sb->s_time_min = EXT4_TIMESTAMP_MIN;
> + }
> +
> + if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
> + sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
> + EXT4_GOOD_OLD_INODE_SIZE;
> + if (ext4_has_feature_extra_isize(sb)) {
> + unsigned v, max = (sbi->s_inode_size -
> + EXT4_GOOD_OLD_INODE_SIZE);
> +
> + v = le16_to_cpu(es->s_want_extra_isize);
> + if (v > max) {
> + ext4_msg(sb, KERN_ERR,
> + "bad s_want_extra_isize: %d", v);
> + return -EINVAL;
> + }
> + if (sbi->s_want_extra_isize < v)
> + sbi->s_want_extra_isize = v;
> +
> + v = le16_to_cpu(es->s_min_extra_isize);
> + if (v > max) {
> + ext4_msg(sb, KERN_ERR,
> + "bad s_min_extra_isize: %d", v);
> + return -EINVAL;
> + }
> + if (sbi->s_want_extra_isize < v)
> + sbi->s_want_extra_isize = v;
> + }
> + }
> +
> + return 0;
> +}
> +
> static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
> {
> struct buffer_head *bh, **group_desc;
> @@ -4590,68 +4663,8 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
> if (blocksize == PAGE_SIZE)
> set_opt(sb, DIOREAD_NOLOCK);
>
> - if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) {
> - sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE;
> - sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO;
> - } else {
> - sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
> - sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
> - if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) {
> - ext4_msg(sb, KERN_ERR, "invalid first ino: %u",
> - sbi->s_first_ino);
> - goto failed_mount;
> - }
> - if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||
> - (!is_power_of_2(sbi->s_inode_size)) ||
> - (sbi->s_inode_size > blocksize)) {
> - ext4_msg(sb, KERN_ERR,
> - "unsupported inode size: %d",
> - sbi->s_inode_size);
> - ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize);
> - goto failed_mount;
> - }
> - /*
> - * i_atime_extra is the last extra field available for
> - * [acm]times in struct ext4_inode. Checking for that
> - * field should suffice to ensure we have extra space
> - * for all three.
> - */
> - if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +
> - sizeof(((struct ext4_inode *)0)->i_atime_extra)) {
> - sb->s_time_gran = 1;
> - sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;
> - } else {
> - sb->s_time_gran = NSEC_PER_SEC;
> - sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;
> - }
> - sb->s_time_min = EXT4_TIMESTAMP_MIN;
> - }
> - if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
> - sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
> - EXT4_GOOD_OLD_INODE_SIZE;
> - if (ext4_has_feature_extra_isize(sb)) {
> - unsigned v, max = (sbi->s_inode_size -
> - EXT4_GOOD_OLD_INODE_SIZE);
> -
> - v = le16_to_cpu(es->s_want_extra_isize);
> - if (v > max) {
> - ext4_msg(sb, KERN_ERR,
> - "bad s_want_extra_isize: %d", v);
> - goto failed_mount;
> - }
> - if (sbi->s_want_extra_isize < v)
> - sbi->s_want_extra_isize = v;
> -
> - v = le16_to_cpu(es->s_min_extra_isize);
> - if (v > max) {
> - ext4_msg(sb, KERN_ERR,
> - "bad s_min_extra_isize: %d", v);
> - goto failed_mount;
> - }
> - if (sbi->s_want_extra_isize < v)
> - sbi->s_want_extra_isize = v;
> - }
> - }
> + if (ext4_inode_info_init(sb, es, blocksize))
> + goto failed_mount;
>
> err = parse_apply_sb_mount_options(sb, ctx);
> if (err < 0)
> --
> 2.31.1
>
--
Jan Kara <jack@...e.com>
SUSE Labs, CR
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