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Date: Mon, 21 Mar 2022 09:59:11 +0800
From: Zhiqiang Liu <liuzhiqiang26@...wei.com>
To: Li Jinlin <lijinlin3@...wei.com>, <tytso@....edu>
CC: <linux-ext4@...r.kernel.org>, <linfeilong@...wei.com>
Subject: Re: [PATCH] e2fsck: subtract acl blocks when setting i_file_acl to
zero
For truncating orphaned inode, we should not remove its ACL in release_inode_blocks(),
otherwise it may cause safety problems due to loss of acl.
diff --git a/e2fsck/super.c b/e2fsck/super.c
index 31e2ffb..6249e12 100644
--- a/e2fsck/super.c
+++ b/e2fsck/super.c
@@ -236,6 +236,10 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
ext2fs_iblk_sub_blocks(fs, EXT2_INODE(inode),
pb.truncated_blocks);
+ /* do not clean up file acl if the inode is truncating type */
+ if (inode->i_links_count)
+ return 0;
+
blk = ext2fs_file_acl_block(fs, EXT2_INODE(inode));
if (blk) {
retval = ext2fs_adjust_ea_refcount3(fs, blk, block_buf, -1,
--
2.27.0
On 2022/3/18 0:54, Li Jinlin wrote:
> We got issue as follows:
> [root@...alhost ~]# e2fsck -a img
> img: recovering journal
> img: Truncating orphaned inode 188 (uid=0, gid=0, mode=0100666, size=0)
> img: Truncating orphaned inode 174 (uid=0, gid=0, mode=0100666, size=0)
> img: clean, 484/128016 files, 118274/512000 blocks
> [root@...alhost ~]# e2fsck -fn img
> e2fsck 1.46.5 (30-Dec-2021)
> Pass 1: Checking inodes, blocks, and sizes
> Inode 174, i_blocks is 2, should be 0. Fix? no
>
> Inode 188, i_blocks is 2, should be 0. Fix? no
>
> Pass 2: Checking directory structure
> Pass 3: Checking directory connectivity
> Pass 4: Checking reference counts
> Pass 5: Checking group summary information
>
> img: ********** WARNING: Filesystem still has errors **********
>
> img: 484/128016 files (24.6% non-contiguous), 118274/512000 blocks
>
>
> File ACL would be set to zero in release_inode_blocks(), but the
> blocks count will not be subtract acl blocks, which causes this issue.
>
> To slove this issue, subtract acl blocks when setting i_file_acl to
> zero.
>
> Signed-off-by: LiJinlin <lijinlin3@...wei.com>
> Signed-off-by: Zhiqiang Liu <liuzhiqiang26@...wei.com>
> ---
> e2fsck/super.c | 7 +++++--
> lib/ext2fs/ext2fs.h | 5 +++++
> lib/ext2fs/ext_attr.c | 15 +++++++++++++--
> 3 files changed, 23 insertions(+), 4 deletions(-)
>
> diff --git a/e2fsck/super.c b/e2fsck/super.c
> index 9495e029..715a8dc9 100644
> --- a/e2fsck/super.c
> +++ b/e2fsck/super.c
> @@ -194,6 +194,7 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
> blk64_t blk;
> errcode_t retval;
> __u32 count;
> + __u32 blocks;
>
> if (!ext2fs_inode_has_valid_blocks2(fs, EXT2_INODE(inode)))
> return 0;
> @@ -238,8 +239,10 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
>
> blk = ext2fs_file_acl_block(fs, EXT2_INODE(inode));
> if (blk) {
> - retval = ext2fs_adjust_ea_refcount3(fs, blk, block_buf, -1,
> - &count, ino);
> + retval = ext2fs_adjust_ea_refcount4(fs, blk, block_buf, -1,
> + &count, ino, &blocks);
> + if (retval == 0)
> + ext2fs_iblk_sub_blocks(fs, EXT2_INODE(inode), blocks);
> if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
> retval = 0;
> count = 1;
> diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
> index 68f9c1fe..8ebebf31 100644
> --- a/lib/ext2fs/ext2fs.h
> +++ b/lib/ext2fs/ext2fs.h
> @@ -1289,6 +1289,11 @@ extern errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
> char *block_buf,
> int adjust, __u32 *newcount,
> ext2_ino_t inum);
> +extern errcode_t ext2fs_adjust_ea_refcount4(ext2_filsys fs, blk64_t blk,
> + char *block_buf,
> + int adjust, __u32 *newcount,
> + ext2_ino_t inum,
> + __u32 *blocks);
> errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle);
> errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle);
> errcode_t ext2fs_xattrs_read_inode(struct ext2_xattr_handle *handle,
> diff --git a/lib/ext2fs/ext_attr.c b/lib/ext2fs/ext_attr.c
> index d36fe68d..1538a53a 100644
> --- a/lib/ext2fs/ext_attr.c
> +++ b/lib/ext2fs/ext_attr.c
> @@ -237,9 +237,10 @@ errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, void *inbuf)
> /*
> * This function adjusts the reference count of the EA block.
> */
> -errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
> +errcode_t ext2fs_adjust_ea_refcount4(ext2_filsys fs, blk64_t blk,
> char *block_buf, int adjust,
> - __u32 *newcount, ext2_ino_t inum)
> + __u32 *newcount, ext2_ino_t inum,
> + __u32 *blocks)
> {
> errcode_t retval;
> struct ext2_ext_attr_header *header;
> @@ -264,6 +265,8 @@ errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
> header->h_refcount += adjust;
> if (newcount)
> *newcount = header->h_refcount;
> + if (blocks)
> + *blocks = header->h_blocks;
>
> retval = ext2fs_write_ext_attr3(fs, blk, block_buf, inum);
> if (retval)
> @@ -275,6 +278,14 @@ errout:
> return retval;
> }
>
> +errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
> + char *block_buf, int adjust,
> + __u32 *newcount, ext2_ino_t inum)
> +{
> + return ext2fs_adjust_ea_refcount4(fs, blk, block_buf, adjust,
> + newcount, 0, NULL);
> +}
> +
> errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk,
> char *block_buf, int adjust,
> __u32 *newcount)
>
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