minix: Track metadata bhs in fs-private inode part

Track metadata bhs for an inode in fs-private part of the inode.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20260326095354.16340-81-jack@suse.cz
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: jankara

fs/minix/dir.c

@@ -23,7 +23,7 @@ const struct file_operations minix_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.iterate_shared	= minix_readdir,
-	.fsync		= generic_buffers_fsync,
+	.fsync		= minix_fsync,
 };
 
 /*

fs/minix/file.c

@@ -7,8 +7,16 @@
  *  minix regular file handling primitives
  */
 
+#include <linux/buffer_head.h>
 #include "minix.h"
 
+int minix_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	return mmb_fsync(file,
+			&minix_i(file->f_mapping->host)->i_metadata_bhs,
+			start, end, datasync);
+}
+
 /*
  * We have mostly NULLs here: the current defaults are OK for
  * the minix filesystem.
@@ -18,7 +26,7 @@ const struct file_operations minix_file_operations = {
 	.read_iter	= generic_file_read_iter,
 	.write_iter	= generic_file_write_iter,
 	.mmap_prepare	= generic_file_mmap_prepare,
-	.fsync		= generic_buffers_fsync,
+	.fsync		= minix_fsync,
 	.splice_read	= filemap_splice_read,
 };
 

fs/minix/inode.c

@@ -49,9 +49,9 @@ static void minix_evict_inode(struct inode *inode)
 		inode->i_size = 0;
 		minix_truncate(inode);
 	} else {
-		sync_mapping_buffers(&inode->i_data);
+		mmb_sync(&minix_i(inode)->i_metadata_bhs);
 	}
-	invalidate_inode_buffers(inode);
+	mmb_invalidate(&minix_i(inode)->i_metadata_bhs);
 	clear_inode(inode);
 	if (!inode->i_nlink)
 		minix_free_inode(inode);
@@ -85,6 +85,8 @@ static struct inode *minix_alloc_inode(struct super_block *sb)
 	ei = alloc_inode_sb(sb, minix_inode_cachep, GFP_KERNEL);
 	if (!ei)
 		return NULL;
+	mmb_init(&ei->i_metadata_bhs, &ei->vfs_inode.i_data);
+
 	return &ei->vfs_inode;
 }
 

fs/minix/itree_common.c

@@ -98,7 +98,7 @@ static int alloc_branch(struct inode *inode,
 		*branch[n].p = branch[n].key;
 		set_buffer_uptodate(bh);
 		unlock_buffer(bh);
-		mark_buffer_dirty_inode(bh, inode);
+		mmb_mark_buffer_dirty(bh, &minix_i(inode)->i_metadata_bhs);
 		parent = nr;
 	}
 	if (n == num)
@@ -135,7 +135,8 @@ static inline int splice_branch(struct inode *inode,
 
 	/* had we spliced it onto indirect block? */
 	if (where->bh)
-		mark_buffer_dirty_inode(where->bh, inode);
+		mmb_mark_buffer_dirty(where->bh,
+				      &minix_i(inode)->i_metadata_bhs);
 
 	mark_inode_dirty(inode);
 	return 0;
@@ -328,14 +329,16 @@ static inline void truncate (struct inode * inode)
 		if (partial == chain)
 			mark_inode_dirty(inode);
 		else
-			mark_buffer_dirty_inode(partial->bh, inode);
+			mmb_mark_buffer_dirty(partial->bh,
+					      &minix_i(inode)->i_metadata_bhs);
 		free_branches(inode, &nr, &nr+1, (chain+n-1) - partial);
 	}
 	/* Clear the ends of indirect blocks on the shared branch */
 	while (partial > chain) {
 		free_branches(inode, partial->p + 1, block_end(partial->bh),
 				(chain+n-1) - partial);
-		mark_buffer_dirty_inode(partial->bh, inode);
+		mmb_mark_buffer_dirty(partial->bh,
+				      &minix_i(inode)->i_metadata_bhs);
 		brelse (partial->bh);
 		partial--;
 	}

fs/minix/minix.h

@@ -19,6 +19,7 @@ struct minix_inode_info {
 		__u16 i1_data[16];
 		__u32 i2_data[16];
 	} u;
+	struct mapping_metadata_bhs i_metadata_bhs;
 	struct inode vfs_inode;
 };
 
@@ -57,6 +58,8 @@ unsigned long minix_count_free_blocks(struct super_block *sb);
 int minix_getattr(struct mnt_idmap *, const struct path *,
 		struct kstat *, u32, unsigned int);
 int minix_prepare_chunk(struct folio *folio, loff_t pos, unsigned len);
+struct mapping_metadata_bhs *minix_get_metadata_bhs(struct inode *inode);
+int minix_fsync(struct file *file, loff_t start, loff_t end, int datasync);
 
 extern void V1_minix_truncate(struct inode *);
 extern void V2_minix_truncate(struct inode *);