From bcfe94139a45fae128844558d6e27a0258860a90 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Fri, 11 May 2018 17:44:19 +0100 Subject: 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 Reviewed-by: Bob Peterson --- fs/gfs2/bmap.c | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) (limited to 'fs') diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 9a699c0a5df1..8b5876e19ecf 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -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++; + 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; -- cgit v1.2.3