On Fri, Sep 29, 2017 at 06:48:49AM +0000, Qu Wenruo wrote:
> Output the invalid member name and its bad value, along with its
> expected value range or alignment.
>
> Signed-off-by: Qu Wenruo <quwenruo.bt...@gmx.com>
> ---
> fs/btrfs/tree-checker.c | 98
> +++++++++++++++++++++++++++++++++++--------------
> 1 file changed, 70 insertions(+), 28 deletions(-)
>
> diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
> index c0fd192f8140..d546c723069e 100644
> --- a/fs/btrfs/tree-checker.c
> +++ b/fs/btrfs/tree-checker.c
> @@ -31,12 +31,6 @@
> #include "disk-io.h"
> #include "compression.h"
>
> -#define CORRUPT(reason, eb, root, slot)
> \
> - btrfs_crit(root->fs_info, \
> - "corrupt %s, %s: block=%llu, root=%llu, slot=%d", \
> - btrfs_header_level(eb) == 0 ? "leaf" : "node", \
> - reason, btrfs_header_bytenr(eb), root->objectid, slot)
> -
> /*
> * Error message should follow the format below:
> * corrupt <type>: <identifier>, <reason>[, <bad_value>]
> @@ -79,6 +73,47 @@ static void generic_err(const struct btrfs_root *root,
> va_end(args);
> }
>
> +/*
> + * Customized reporter for extent data item, since its key objectid and
> + * offset has its own meaning.
> + */
> +__printf(4, 5)
> +static void file_extent_err(const struct btrfs_root *root,
> + const struct extent_buffer *eb,
> + int slot, const char *fmt, ...)
> +{
> + struct btrfs_key key;
> + struct va_format vaf;
> + va_list args;
> +
> + btrfs_item_key_to_cpu(eb, &key, slot);
> + va_start(args, fmt);
> +
> + vaf.fmt = fmt;
> + vaf.va = &args;
> +
> + btrfs_crit(root->fs_info,
> + "corrupt %s: root=%llu block=%llu slot=%d ino=%llu
> file_offset=%llu, %pV",
> + btrfs_header_level(eb) == 0 ? "leaf" : "node",
> + root->objectid, btrfs_header_bytenr(eb), slot,
> + key.objectid, key.offset, &vaf);
> + va_end(args);
> +}
> +
> +/*
> + * Return 0 if the btrfs_file_extent_##name is aligned to @align
> + * Else return 1
> + */
> +#define CHECK_FI_ALIGN(root, leaf, slot, fi, name, align) \
CHECK_FI_ALIGNED(root, leaf, slot, fi, name, alignment) \
and maybe CHECK_FE_ALIGNED, so the mnemonics match 'file extent'.
CHECK_FI_ALIGNED looks like it's typo of CHECK_IF_ALIGNED.
also please add macro argument protection where appropriate (ie. not the
stringified or glued identifiers)
> +({ \
> + if (!IS_ALIGNED(btrfs_file_extent_##name(leaf, fi), align)) \
> + file_extent_err(root, leaf, slot, \
> + "invalid %s for file extent, have %llu, should be
> aligned to %u",\
> + #name, btrfs_file_extent_##name(leaf, fi), \
> + align); \
> + (!IS_ALIGNED(btrfs_file_extent_##name(leaf, fi), align)); \
> +})
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