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Date: Mon, 20 Sep 2021 15:57:57 +0200
From: Jan Kara <jack@...e.cz>
To: Zhang Yi <yi.zhang@...wei.com>
Cc: linux-ext4@...r.kernel.org, tytso@....edu,
adilger.kernel@...ger.ca, jack@...e.cz, yukuai3@...wei.com
Subject: Re: [PATCH v5 2/3] ext4: move ext4_fill_raw_inode() related functions
On Wed 01-09-21 10:09:54, Zhang Yi wrote:
> In preparation for calling ext4_fill_raw_inode() in
> __ext4_get_inode_loc(), move three related functions before
> __ext4_get_inode_loc(), no logical change.
>
> Signed-off-by: Zhang Yi <yi.zhang@...wei.com>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@...e.cz>
Honza
> ---
> fs/ext4/inode.c | 293 ++++++++++++++++++++++++------------------------
> 1 file changed, 147 insertions(+), 146 deletions(-)
>
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index c7186460c14d..3c36e701e30e 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -4292,6 +4292,153 @@ int ext4_truncate(struct inode *inode)
> return err;
> }
>
> +static inline u64 ext4_inode_peek_iversion(const struct inode *inode)
> +{
> + if (unlikely(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL))
> + return inode_peek_iversion_raw(inode);
> + else
> + return inode_peek_iversion(inode);
> +}
> +
> +static int ext4_inode_blocks_set(struct ext4_inode *raw_inode,
> + struct ext4_inode_info *ei)
> +{
> + struct inode *inode = &(ei->vfs_inode);
> + u64 i_blocks = READ_ONCE(inode->i_blocks);
> + struct super_block *sb = inode->i_sb;
> +
> + if (i_blocks <= ~0U) {
> + /*
> + * i_blocks can be represented in a 32 bit variable
> + * as multiple of 512 bytes
> + */
> + raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
> + raw_inode->i_blocks_high = 0;
> + ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
> + return 0;
> + }
> +
> + /*
> + * This should never happen since sb->s_maxbytes should not have
> + * allowed this, sb->s_maxbytes was set according to the huge_file
> + * feature in ext4_fill_super().
> + */
> + if (!ext4_has_feature_huge_file(sb))
> + return -EFSCORRUPTED;
> +
> + if (i_blocks <= 0xffffffffffffULL) {
> + /*
> + * i_blocks can be represented in a 48 bit variable
> + * as multiple of 512 bytes
> + */
> + raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
> + raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
> + ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
> + } else {
> + ext4_set_inode_flag(inode, EXT4_INODE_HUGE_FILE);
> + /* i_block is stored in file system block size */
> + i_blocks = i_blocks >> (inode->i_blkbits - 9);
> + raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
> + raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
> + }
> + return 0;
> +}
> +
> +static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode)
> +{
> + struct ext4_inode_info *ei = EXT4_I(inode);
> + uid_t i_uid;
> + gid_t i_gid;
> + projid_t i_projid;
> + int block;
> + int err;
> +
> + err = ext4_inode_blocks_set(raw_inode, ei);
> +
> + raw_inode->i_mode = cpu_to_le16(inode->i_mode);
> + i_uid = i_uid_read(inode);
> + i_gid = i_gid_read(inode);
> + i_projid = from_kprojid(&init_user_ns, ei->i_projid);
> + if (!(test_opt(inode->i_sb, NO_UID32))) {
> + raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
> + raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
> + /*
> + * Fix up interoperability with old kernels. Otherwise,
> + * old inodes get re-used with the upper 16 bits of the
> + * uid/gid intact.
> + */
> + if (ei->i_dtime && list_empty(&ei->i_orphan)) {
> + raw_inode->i_uid_high = 0;
> + raw_inode->i_gid_high = 0;
> + } else {
> + raw_inode->i_uid_high =
> + cpu_to_le16(high_16_bits(i_uid));
> + raw_inode->i_gid_high =
> + cpu_to_le16(high_16_bits(i_gid));
> + }
> + } else {
> + raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));
> + raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));
> + raw_inode->i_uid_high = 0;
> + raw_inode->i_gid_high = 0;
> + }
> + raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
> +
> + EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
> + EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
> + EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
> + EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
> +
> + raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
> + raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);
> + if (likely(!test_opt2(inode->i_sb, HURD_COMPAT)))
> + raw_inode->i_file_acl_high =
> + cpu_to_le16(ei->i_file_acl >> 32);
> + raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
> + ext4_isize_set(raw_inode, ei->i_disksize);
> +
> + raw_inode->i_generation = cpu_to_le32(inode->i_generation);
> + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
> + if (old_valid_dev(inode->i_rdev)) {
> + raw_inode->i_block[0] =
> + cpu_to_le32(old_encode_dev(inode->i_rdev));
> + raw_inode->i_block[1] = 0;
> + } else {
> + raw_inode->i_block[0] = 0;
> + raw_inode->i_block[1] =
> + cpu_to_le32(new_encode_dev(inode->i_rdev));
> + raw_inode->i_block[2] = 0;
> + }
> + } else if (!ext4_has_inline_data(inode)) {
> + for (block = 0; block < EXT4_N_BLOCKS; block++)
> + raw_inode->i_block[block] = ei->i_data[block];
> + }
> +
> + if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
> + u64 ivers = ext4_inode_peek_iversion(inode);
> +
> + raw_inode->i_disk_version = cpu_to_le32(ivers);
> + if (ei->i_extra_isize) {
> + if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
> + raw_inode->i_version_hi =
> + cpu_to_le32(ivers >> 32);
> + raw_inode->i_extra_isize =
> + cpu_to_le16(ei->i_extra_isize);
> + }
> + }
> +
> + if (i_projid != EXT4_DEF_PROJID &&
> + !ext4_has_feature_project(inode->i_sb))
> + err = err ?: -EFSCORRUPTED;
> +
> + if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
> + EXT4_FITS_IN_INODE(raw_inode, ei, i_projid))
> + raw_inode->i_projid = cpu_to_le32(i_projid);
> +
> + ext4_inode_csum_set(inode, raw_inode, ei);
> + return err;
> +}
> +
> /*
> * ext4_get_inode_loc returns with an extra refcount against the inode's
> * underlying buffer_head on success. If 'in_mem' is true, we have all
> @@ -4580,13 +4727,6 @@ static inline void ext4_inode_set_iversion_queried(struct inode *inode, u64 val)
> else
> inode_set_iversion_queried(inode, val);
> }
> -static inline u64 ext4_inode_peek_iversion(const struct inode *inode)
> -{
> - if (unlikely(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL))
> - return inode_peek_iversion_raw(inode);
> - else
> - return inode_peek_iversion(inode);
> -}
>
> struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
> ext4_iget_flags flags, const char *function,
> @@ -4902,50 +5042,6 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
> return ERR_PTR(ret);
> }
>
> -static int ext4_inode_blocks_set(struct ext4_inode *raw_inode,
> - struct ext4_inode_info *ei)
> -{
> - struct inode *inode = &(ei->vfs_inode);
> - u64 i_blocks = READ_ONCE(inode->i_blocks);
> - struct super_block *sb = inode->i_sb;
> -
> - if (i_blocks <= ~0U) {
> - /*
> - * i_blocks can be represented in a 32 bit variable
> - * as multiple of 512 bytes
> - */
> - raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
> - raw_inode->i_blocks_high = 0;
> - ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
> - return 0;
> - }
> -
> - /*
> - * This should never happen since sb->s_maxbytes should not have
> - * allowed this, sb->s_maxbytes was set according to the huge_file
> - * feature in ext4_fill_super().
> - */
> - if (!ext4_has_feature_huge_file(sb))
> - return -EFSCORRUPTED;
> -
> - if (i_blocks <= 0xffffffffffffULL) {
> - /*
> - * i_blocks can be represented in a 48 bit variable
> - * as multiple of 512 bytes
> - */
> - raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
> - raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
> - ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
> - } else {
> - ext4_set_inode_flag(inode, EXT4_INODE_HUGE_FILE);
> - /* i_block is stored in file system block size */
> - i_blocks = i_blocks >> (inode->i_blkbits - 9);
> - raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
> - raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
> - }
> - return 0;
> -}
> -
> static void __ext4_update_other_inode_time(struct super_block *sb,
> unsigned long orig_ino,
> unsigned long ino,
> @@ -5006,101 +5102,6 @@ static void ext4_update_other_inodes_time(struct super_block *sb,
> rcu_read_unlock();
> }
>
> -static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode)
> -{
> - struct ext4_inode_info *ei = EXT4_I(inode);
> - uid_t i_uid;
> - gid_t i_gid;
> - projid_t i_projid;
> - int block;
> - int err;
> -
> - err = ext4_inode_blocks_set(raw_inode, ei);
> -
> - raw_inode->i_mode = cpu_to_le16(inode->i_mode);
> - i_uid = i_uid_read(inode);
> - i_gid = i_gid_read(inode);
> - i_projid = from_kprojid(&init_user_ns, ei->i_projid);
> - if (!(test_opt(inode->i_sb, NO_UID32))) {
> - raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
> - raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
> - /*
> - * Fix up interoperability with old kernels. Otherwise,
> - * old inodes get re-used with the upper 16 bits of the
> - * uid/gid intact.
> - */
> - if (ei->i_dtime && list_empty(&ei->i_orphan)) {
> - raw_inode->i_uid_high = 0;
> - raw_inode->i_gid_high = 0;
> - } else {
> - raw_inode->i_uid_high =
> - cpu_to_le16(high_16_bits(i_uid));
> - raw_inode->i_gid_high =
> - cpu_to_le16(high_16_bits(i_gid));
> - }
> - } else {
> - raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));
> - raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));
> - raw_inode->i_uid_high = 0;
> - raw_inode->i_gid_high = 0;
> - }
> - raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
> -
> - EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
> - EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
> - EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
> - EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
> -
> - raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
> - raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);
> - if (likely(!test_opt2(inode->i_sb, HURD_COMPAT)))
> - raw_inode->i_file_acl_high =
> - cpu_to_le16(ei->i_file_acl >> 32);
> - raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
> - ext4_isize_set(raw_inode, ei->i_disksize);
> -
> - raw_inode->i_generation = cpu_to_le32(inode->i_generation);
> - if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
> - if (old_valid_dev(inode->i_rdev)) {
> - raw_inode->i_block[0] =
> - cpu_to_le32(old_encode_dev(inode->i_rdev));
> - raw_inode->i_block[1] = 0;
> - } else {
> - raw_inode->i_block[0] = 0;
> - raw_inode->i_block[1] =
> - cpu_to_le32(new_encode_dev(inode->i_rdev));
> - raw_inode->i_block[2] = 0;
> - }
> - } else if (!ext4_has_inline_data(inode)) {
> - for (block = 0; block < EXT4_N_BLOCKS; block++)
> - raw_inode->i_block[block] = ei->i_data[block];
> - }
> -
> - if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
> - u64 ivers = ext4_inode_peek_iversion(inode);
> -
> - raw_inode->i_disk_version = cpu_to_le32(ivers);
> - if (ei->i_extra_isize) {
> - if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
> - raw_inode->i_version_hi =
> - cpu_to_le32(ivers >> 32);
> - raw_inode->i_extra_isize =
> - cpu_to_le16(ei->i_extra_isize);
> - }
> - }
> -
> - if (i_projid != EXT4_DEF_PROJID &&
> - !ext4_has_feature_project(inode->i_sb))
> - err = err ?: -EFSCORRUPTED;
> -
> - if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
> - EXT4_FITS_IN_INODE(raw_inode, ei, i_projid))
> - raw_inode->i_projid = cpu_to_le32(i_projid);
> -
> - ext4_inode_csum_set(inode, raw_inode, ei);
> - return err;
> -}
> -
> /*
> * Post the struct inode info into an on-disk inode location in the
> * buffer-cache. This gobbles the caller's reference to the
> --
> 2.31.1
>
--
Jan Kara <jack@...e.com>
SUSE Labs, CR
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