[U-Boot] [PATCH 2/2] ubifs: BUG: Blocks commpressed with zlib

[Stefan Roese]

On Friday 24 April 2009, Ricardo Ribalda Delgado wrote:
> Blocks compressed with zlib dont have the full gzip header.
>
> This patch adds a new function to properly handle blocks compressed
> with zlib.
>
> Without this patch, block compressed with zlib cannot be readed!
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda at uam.es>

Looks better. Below some mostly nitpicking comments.

> ---
> v2: remove unused parts..
>  fs/ubifs/ubifs.c |   36 +++++++++++++++++++++++++++++++++++-
>  fs/ubifs/ubifs.h |    2 --
>  2 files changed, 35 insertions(+), 3 deletions(-)
>
> diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c
> index 3c8b5da..44bf651 100644
> --- a/fs/ubifs/ubifs.c
> +++ b/fs/ubifs/ubifs.c
> @@ -24,6 +24,7 @@
>   */
>
>  #include "ubifs.h"
> +#include <u-boot/zlib.h>
>
>  #if !defined(CONFIG_SYS_64BIT_VSPRINTF)
>  #warning Please define CONFIG_SYS_64BIT_VSPRINTF for correct output!
> @@ -33,6 +34,10 @@ DECLARE_GLOBAL_DATA_PTR;
>
>  /* compress.c */
>
> +int ubi_gunzip(void *dst, int dstlen, unsigned char *src, unsigned long
> *lenp);
> +void *zalloc(void *, unsigned, unsigned); 
> +void zfree(void *, void *, unsigned);

Please move those prototypes to the header instead (ubifs.h).

> +
>  /*
>   * We need a wrapper for gunzip() because the parameters are
>   * incompatible with the lzo decompressor.
> @@ -41,7 +46,7 @@ static int gzip_decompress(const unsigned char *in,
> size_t in_len, unsigned char *out, size_t *out_len)
>  {
>  	unsigned long len = in_len;
> -	return gunzip(out, *out_len, (unsigned char *)in, &len);
> +	return ubi_gunzip(out, *out_len, (unsigned char *)in, &len);
>  }
>
>  /* Fake description object for the "none" compressor */
> @@ -686,3 +691,32 @@ out:
>  	ubi_close_volume(c->ubi);
>  	return err;
>  }
> +
> +int ubi_gunzip(void *dst, int dstlen, unsigned char *src, unsigned long
> *lenp) +{
> +	z_stream s;
> +	int r, flags;
> +
> +	s.zalloc = zalloc;
> +	s.zfree = zfree;
> +#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
> +	s.outcb = (cb_func)WATCHDOG_RESET;
> +#else
> +	s.outcb = Z_NULL;
> +#endif	/* CONFIG_HW_WATCHDOG */
> +
> +	r = inflateInit2(&s, -MAX_WBITS);
> +	if (r != Z_OK) {
> +		printf ("Error: inflateInit2() returned %d\n", r);
> +		return (-1);

return is not a function. So just use:

		return -1;

> +	}
> +	s.next_in = src;
> +	s.avail_in = *lenp;
> +	s.next_out = dst;
> +	s.avail_out = dstlen;
> +	r = inflate(&s, Z_FINISH);
> +	*lenp = s.next_out - (unsigned char *) dst;
> +	inflateEnd(&s);
> +
> +	return (0);

Again, please "return 0;" here.

Thanks.

Best regards,
Stefan

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