On Mon, Mar 23, 2015 at 03:11:25PM -0500, Eric Sandeen wrote:
> Currently, the "ino_crc_ok" field on the io cursor reflects
> overall inode validity, not CRC correctness. Because it is
> only used when printing CRC validity, change it to reflect
> only that state - and update it whenever we re-write the
> inode (thus updating the CRC).
>
> In addition, when reading an inode, warn if the CRC is bad.
>
> Note, when specifying an inode which doesn't actually exist,
> this will claim corruption; I'm not sure if that's good or
> bad. Today, it already issues corruption errors on the way;
> this adds a new message as well:
>
> xfs_db> inode 129
> Metadata corruption detected at block 0x80/0x2000
> Metadata corruption detected at block 0x80/0x2000
> ...
> Metadata CRC error detected for ino 129
>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
>
> V2: move ino_crc_ok calculations under "if (xfs_sb_version_hascrc())"
>
> diff --git a/db/inode.c b/db/inode.c
> index 24170ba..4f9c65d 100644
> --- a/db/inode.c
> +++ b/db/inode.c
> @@ -684,13 +684,22 @@ set_cur_inode(
> numblks, DB_RING_IGN, NULL);
> off_cur(offset << mp->m_sb.sb_inodelog, mp->m_sb.sb_inodesize);
> dip = iocur_top->data;
> - iocur_top->ino_crc_ok = libxfs_dinode_verify(mp, ino, dip);
> iocur_top->ino_buf = 1;
> iocur_top->ino = ino;
> iocur_top->mode = be16_to_cpu(dip->di_mode);
> if ((iocur_top->mode & S_IFMT) == S_IFDIR)
> iocur_top->dirino = ino;
>
> + if (xfs_sb_version_hascrc(&mp->m_sb)) {
> + iocur_top->ino_crc_ok = libxfs_verify_cksum((char *)dip,
> + mp->m_sb.sb_inodesize,
> + XFS_DINODE_CRC_OFF);
> + if (!iocur_top->ino_crc_ok)
> + dbprintf(
> +_("Metadata CRC error detected for ino %lld\n"),
> + ino);
> + }
> +
> /* track updated info in ring */
> ring_add();
> }
> diff --git a/db/io.c b/db/io.c
> index c5898f1..d906123 100644
> --- a/db/io.c
> +++ b/db/io.c
> @@ -471,8 +471,10 @@ write_cur(void)
> return;
> }
>
> - if (iocur_top->ino_buf)
> + if (xfs_sb_version_hascrc(&mp->m_sb) && iocur_top->ino_buf) {
> libxfs_dinode_calc_crc(mp, iocur_top->data);
> + iocur_top->ino_crc_ok = 1;
> + }
> if (iocur_top->dquot_buf)
> xfs_update_cksum(iocur_top->data, sizeof(struct xfs_dqblk),
> XFS_DQUOT_CRC_OFF);
> diff --git a/include/libxfs.h b/include/libxfs.h
> index 45a924f..962e319 100644
> --- a/include/libxfs.h
> +++ b/include/libxfs.h
> @@ -782,6 +782,8 @@ extern uint32_t crc32c_le(uint32_t crc, unsigned char const *p, size_t len);
>
> #include <xfs/xfs_cksum.h>
>
> +#define libxfs_verify_cksum xfs_verify_cksum
> +
> static inline int
> xfs_buf_verify_cksum(struct xfs_buf *bp, unsigned long cksum_offset)
> {
>
>
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