From: Andreas Gruenbacher <agruenba@redhat.com>
To: cluster-devel@redhat.com, Christoph Hellwig <hch@lst.de>
Cc: linux-fsdevel@vger.kernel.org, Andreas Gruenbacher <agruenba@redhat.com>
Subject: [PATCH v7 09/12] gfs2: gfs2_extent_length cleanup
Date: Mon, 4 Jun 2018 14:37:26 +0200 [thread overview]
Message-ID: <20180604123729.23414-10-agruenba@redhat.com> (raw)
In-Reply-To: <20180604123729.23414-1-agruenba@redhat.com>
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>
---
fs/gfs2/bmap.c | 24 ++++++++----------------
1 file changed, 8 insertions(+), 16 deletions(-)
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index b394fa5979be..f485a5b748bc 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)(
@@ -883,7 +875,7 @@ static int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
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;
--
2.17.0
next prev parent reply other threads:[~2018-06-04 12:37 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-04 12:37 [PATCH v7 00/12] gfs2 iomap write support Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 01/12] iomap: inline data should be an iomap type, not a flag Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 02/12] iomap: Mark newly allocated buffer heads as new Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 03/12] iomap: Complete partial direct I/O writes synchronously Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 04/12] fs: factor out a __generic_write_end helper Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 05/12] fs: allow to always dirty inode in __generic_write_end Andreas Gruenbacher
2018-06-04 12:48 ` Christoph Hellwig
2018-06-04 16:24 ` Andreas Grünbacher
2018-06-04 12:37 ` [PATCH v7 06/12] iomap: Generic inline data handling Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 07/12] iomap: Add page_write_end iomap hook Andreas Gruenbacher
2018-06-04 12:50 ` Christoph Hellwig
2018-06-04 16:40 ` Andreas Grünbacher
2018-06-04 12:37 ` [PATCH v7 08/12] gfs2: iomap buffered write support Andreas Gruenbacher
2018-06-04 12:37 ` Andreas Gruenbacher [this message]
2018-06-04 12:37 ` [PATCH v7 10/12] gfs2: iomap direct I/O support Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 11/12] gfs2: Remove gfs2_write_{begin,end} Andreas Gruenbacher
2018-06-04 12:37 ` [PATCH v7 12/12] iomap: Put struct iomap_ops into struct iomap Andreas Gruenbacher
2018-06-04 12:52 ` Christoph Hellwig
2018-06-04 17:00 ` Andreas Grünbacher
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