Ocfs2 devel - Mar 2023 - [PATCH v4 1/5] fs: add i_blockmask()

Introduce i_blockmask() to simplify code, which replace
(i_blocksize(node) - 1). Like done in commit
93407472a21b("fs: add i_blocksize()").

Signed-off-by: Yangtao Li <frank.li at vivo.com>
---
v4:
-drop ext4 patch
-erofs patch based on mainline
-a bit change in ocfs2 patch
 include/linux/fs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index c85916e9f7db..17387d465b8b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -711,6 +711,11 @@ static inline unsigned int i_blocksize(const struct inode
*node)
 	return (1 << node->i_blkbits);
 }
 
+static inline unsigned int i_blockmask(const struct inode *node)
+{
+	return i_blocksize(node) - 1;
+}
+
 static inline int inode_unhashed(struct inode *inode)
 {
 	return hlist_unhashed(&inode->i_hash);
-- 
2.25.1

Use i_blockmask() to simplify code.

Signed-off-by: Yangtao Li <frank.li at vivo.com>
---
 fs/erofs/data.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index e16545849ea7..d394102ef9de 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -376,7 +376,7 @@ static ssize_t erofs_file_read_iter(struct kiocb *iocb,
struct iov_iter *to)
 		if (bdev)
 			blksize_mask = bdev_logical_block_size(bdev) - 1;
 		else
-			blksize_mask = (1 << inode->i_blkbits) - 1;
+			blksize_mask = i_blockmask(inode);
 
 		if ((iocb->ki_pos | iov_iter_count(to) |
 		     iov_iter_alignment(to)) & blksize_mask)
-- 
2.25.1

Use i_blockmask() to simplify code.

Signed-off-by: Yangtao Li <frank.li at vivo.com>
---
 fs/gfs2/bmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index eedf6926c652..1c6874b3851a 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -960,7 +960,7 @@ static struct folio *
 gfs2_iomap_get_folio(struct iomap_iter *iter, loff_t pos, unsigned len)
 {
 	struct inode *inode = iter->inode;
-	unsigned int blockmask = i_blocksize(inode) - 1;
+	unsigned int blockmask = i_blockmask(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
 	unsigned int blocks;
 	struct folio *folio;
-- 
2.25.1

Use i_blockmask() to simplify code. BTW convert ocfs2_is_io_unaligned
to return bool type and the fact that the value will be the same
(i.e. that ->i_blkbits is never changed by ocfs2).

Signed-off-by: Yangtao Li <frank.li at vivo.com>
---
 fs/ocfs2/file.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index efb09de4343d..7fd06a4d27d4 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2159,14 +2159,9 @@ int ocfs2_check_range_for_refcount(struct inode *inode,
loff_t pos,
 	return ret;
 }
 
-static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos)
+static bool ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t
pos)
 {
-	int blockmask = inode->i_sb->s_blocksize - 1;
-	loff_t final_size = pos + count;
-
-	if ((pos & blockmask) || (final_size & blockmask))
-		return 1;
-	return 0;
+	return ((pos | count) & i_blockmask(inode)) != 0;
 }
 
 static int ocfs2_inode_lock_for_extent_tree(struct inode *inode,
-- 
2.25.1

Use i_blockmask() to simplify code.

Signed-off-by: Yangtao Li <frank.li at vivo.com>
---
 fs/remap_range.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/remap_range.c b/fs/remap_range.c
index 1331a890f2f2..7a524b620e7d 100644
--- a/fs/remap_range.c
+++ b/fs/remap_range.c
@@ -127,7 +127,7 @@ static int generic_remap_check_len(struct inode *inode_in,
 				   loff_t *len,
 				   unsigned int remap_flags)
 {
-	u64 blkmask = i_blocksize(inode_in) - 1;
+	u64 blkmask = i_blockmask(inode_in);
 	loff_t new_len = *len;
 
 	if ((*len & blkmask) == 0)
-- 
2.25.1

On 3/10/23 1:48 PM, Yangtao Li wrote:
> Use i_blockmask() to simplify code. BTW convert ocfs2_is_io_unaligned
> to return bool type and the fact that the value will be the same
> (i.e. that ->i_blkbits is never changed by ocfs2).
> 
> Signed-off-by: Yangtao Li <frank.li at vivo.com>
> ---
>  fs/ocfs2/file.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index efb09de4343d..7fd06a4d27d4 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -2159,14 +2159,9 @@ int ocfs2_check_range_for_refcount(struct inode
*inode, loff_t pos,
>  	return ret;
>  }
>  
> -static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t
pos)
> +static bool ocfs2_is_io_unaligned(struct inode *inode, size_t count,
loff_t pos)
>  {
> -	int blockmask = inode->i_sb->s_blocksize - 1;
> -	loff_t final_size = pos + count;
> -
> -	if ((pos & blockmask) || (final_size & blockmask))
> -		return 1;
> -	return 0;
> +	return ((pos | count) & i_blockmask(inode)) != 0;
Or !!((pos | count) & i_blockmask(inode))?

My concern is just like erofs, we'd better get vfs helper into mainline
first. Or can we fold the whole series into one patch? Since it's simple
enough I think.

Thanks,
Joseph
>  }
>  
>  static int ocfs2_inode_lock_for_extent_tree(struct inode *inode,