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gfs2: gfs2_extent_length cleanup 

Now that gfs2_extent_length is no longer used for determining the size
of a hole and always with an upper size limit, the function can be
simplified.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2018-05-11 17:44:19 +01:00
parent 64bc06bb32
commit bcfe94139a
1 changed files with 8 additions and 16 deletions
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22
fs/gfs2/bmap.c
View File

@ -406,22 +406,17 @@ static void release_metapath(struct metapath *mp)
/**
* gfs2_extent_length - Returns length of an extent of blocks
* @start: Start of the buffer
* @len: Length of the buffer in bytes
* @ptr: Current position in the buffer
* @limit: Max extent length to return (0 = unlimited)
* @bh: The metadata block
* @ptr: Current position in @bh
* @limit: Max extent length to return
* @eob: Set to 1 if we hit "end of block"
*
* If the first block is zero (unallocated) it will return the number of
* unallocated blocks in the extent, otherwise it will return the number
* of contiguous blocks in the extent.
*
* Returns: The length of the extent (minimum of one block)
*/
static inline unsigned int gfs2_extent_length(void *start, unsigned int len, __be64 *ptr, size_t limit, int *eob)
static inline unsigned int gfs2_extent_length(struct buffer_head *bh, __be64 *ptr, size_t limit, int *eob)
{
const __be64 *end = (start + len);
const __be64 *end = (__be64 *)(bh->b_data + bh->b_size);
const __be64 *first = ptr;
u64 d = be64_to_cpu(*ptr);
@ -430,14 +425,11 @@ static inline unsigned int gfs2_extent_length(void *start, unsigned int len, __b
ptr++;
if (ptr >= end)
break;
if (limit && --limit == 0)
break;
if (d)
d++;
} while(be64_to_cpu(*ptr) == d);
if (ptr >= end)
*eob = 1;
return (ptr - first);
return ptr - first;
}
typedef const __be64 *(*gfs2_metadata_walker)(
@ -893,7 +885,7 @@ unstuff:
goto do_alloc;
bh = mp->mp_bh[ip->i_height - 1];
len = gfs2_extent_length(bh->b_data, bh->b_size, ptr, len, &eob);
len = gfs2_extent_length(bh, ptr, len, &eob);
iomap->addr = be64_to_cpu(*ptr) << inode->i_blkbits;
iomap->length = len << inode->i_blkbits;