The patch titled
Subject: nilfs2: convert common metadata file code to be folio-based
has been added to the -mm mm-nonmm-unstable branch. Its filename is
nilfs2-convert-common-metadata-file-code-to-be-folio-based.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/nilfs2-convert-common-metadata-file-code-to-be-folio-based.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx>
Subject: nilfs2: convert common metadata file code to be folio-based
Date: Thu, 24 Oct 2024 18:25:36 +0900
In the common routines for metadata files, nilfs_mdt_insert_new_block(),
which inserts a new block buffer into the cache, is still page-based, and
there are two places where bh_offset() is used. Convert these to
page-based.
Link: https://lkml.kernel.org/r/20241024092602.13395-3-konishi.ryusuke@xxxxxxxxx
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nilfs2/alloc.c | 8 +++++---
fs/nilfs2/cpfile.c | 4 ++--
fs/nilfs2/mdt.c | 21 +++++++++++++--------
3 files changed, 20 insertions(+), 13 deletions(-)
--- a/fs/nilfs2/alloc.c~nilfs2-convert-common-metadata-file-code-to-be-folio-based
+++ a/fs/nilfs2/alloc.c
@@ -177,12 +177,14 @@ nilfs_palloc_entry_blkoff(const struct i
* nilfs_palloc_desc_block_init - initialize buffer of a group descriptor block
* @inode: inode of metadata file
* @bh: buffer head of the buffer to be initialized
- * @kaddr: kernel address mapped for the page including the buffer
+ * @from: kernel address mapped for a chunk of the block
+ *
+ * This function does not yet support the case where block size > PAGE_SIZE.
*/
static void nilfs_palloc_desc_block_init(struct inode *inode,
- struct buffer_head *bh, void *kaddr)
+ struct buffer_head *bh, void *from)
{
- struct nilfs_palloc_group_desc *desc = kaddr + bh_offset(bh);
+ struct nilfs_palloc_group_desc *desc = from;
unsigned long n = nilfs_palloc_groups_per_desc_block(inode);
__le32 nfrees;
--- a/fs/nilfs2/cpfile.c~nilfs2-convert-common-metadata-file-code-to-be-folio-based
+++ a/fs/nilfs2/cpfile.c
@@ -113,9 +113,9 @@ nilfs_cpfile_block_get_checkpoint(const
static void nilfs_cpfile_block_init(struct inode *cpfile,
struct buffer_head *bh,
- void *kaddr)
+ void *from)
{
- struct nilfs_checkpoint *cp = kaddr + bh_offset(bh);
+ struct nilfs_checkpoint *cp = from;
size_t cpsz = NILFS_MDT(cpfile)->mi_entry_size;
int n = nilfs_cpfile_checkpoints_per_block(cpfile);
--- a/fs/nilfs2/mdt.c~nilfs2-convert-common-metadata-file-code-to-be-folio-based
+++ a/fs/nilfs2/mdt.c
@@ -33,7 +33,8 @@ nilfs_mdt_insert_new_block(struct inode
struct buffer_head *, void *))
{
struct nilfs_inode_info *ii = NILFS_I(inode);
- void *kaddr;
+ struct folio *folio = bh->b_folio;
+ void *from;
int ret;
/* Caller exclude read accesses using page lock */
@@ -47,12 +48,14 @@ nilfs_mdt_insert_new_block(struct inode
set_buffer_mapped(bh);
- kaddr = kmap_local_page(bh->b_page);
- memset(kaddr + bh_offset(bh), 0, i_blocksize(inode));
+ /* Initialize block (block size > PAGE_SIZE not yet supported) */
+ from = kmap_local_folio(folio, offset_in_folio(folio, bh->b_data));
+ memset(from, 0, bh->b_size);
if (init_block)
- init_block(inode, bh, kaddr);
- flush_dcache_page(bh->b_page);
- kunmap_local(kaddr);
+ init_block(inode, bh, from);
+ kunmap_local(from);
+
+ flush_dcache_folio(folio);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
@@ -571,7 +574,8 @@ int nilfs_mdt_freeze_buffer(struct inode
if (!bh_frozen)
bh_frozen = create_empty_buffers(folio, 1 << blkbits, 0);
- bh_frozen = get_nth_bh(bh_frozen, bh_offset(bh) >> blkbits);
+ bh_frozen = get_nth_bh(bh_frozen,
+ offset_in_folio(folio, bh->b_data) >> blkbits);
if (!buffer_uptodate(bh_frozen))
nilfs_copy_buffer(bh_frozen, bh);
@@ -601,7 +605,8 @@ nilfs_mdt_get_frozen_buffer(struct inode
if (!IS_ERR(folio)) {
bh_frozen = folio_buffers(folio);
if (bh_frozen) {
- n = bh_offset(bh) >> inode->i_blkbits;
+ n = offset_in_folio(folio, bh->b_data) >>
+ inode->i_blkbits;
bh_frozen = get_nth_bh(bh_frozen, n);
}
folio_unlock(folio);
_
Patches currently in -mm which might be from konishi.ryusuke@xxxxxxxxx are
nilfs2-fix-potential-deadlock-with-newly-created-symlinks.patch
nilfs2-convert-segment-buffer-to-be-folio-based.patch
nilfs2-convert-common-metadata-file-code-to-be-folio-based.patch
nilfs2-convert-segment-usage-file-to-be-folio-based.patch
nilfs2-convert-persistent-object-allocator-to-be-folio-based.patch
nilfs2-convert-inode-file-to-be-folio-based.patch
nilfs2-convert-dat-file-to-be-folio-based.patch
nilfs2-remove-nilfs_palloc_block_get_entry.patch
nilfs2-convert-checkpoint-file-to-be-folio-based.patch
