summaryrefslogtreecommitdiffstats
path: root/fs/nilfs2/page.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/nilfs2/page.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/nilfs2/page.h')
-rw-r--r--fs/nilfs2/page.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h
new file mode 100644
index 000000000..21ddcdd4d
--- /dev/null
+++ b/fs/nilfs2/page.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Buffer/page management specific to NILFS
+ *
+ * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * Written by Ryusuke Konishi and Seiji Kihara.
+ */
+
+#ifndef _NILFS_PAGE_H
+#define _NILFS_PAGE_H
+
+#include <linux/buffer_head.h>
+#include "nilfs.h"
+
+/*
+ * Extended buffer state bits
+ */
+enum {
+ BH_NILFS_Allocated = BH_PrivateStart,
+ BH_NILFS_Node,
+ BH_NILFS_Volatile,
+ BH_NILFS_Checked,
+ BH_NILFS_Redirected,
+};
+
+BUFFER_FNS(NILFS_Node, nilfs_node) /* nilfs node buffers */
+BUFFER_FNS(NILFS_Volatile, nilfs_volatile)
+BUFFER_FNS(NILFS_Checked, nilfs_checked) /* buffer is verified */
+BUFFER_FNS(NILFS_Redirected, nilfs_redirected) /* redirected to a copy */
+
+
+int __nilfs_clear_page_dirty(struct page *);
+
+struct buffer_head *nilfs_grab_buffer(struct inode *, struct address_space *,
+ unsigned long, unsigned long);
+void nilfs_forget_buffer(struct buffer_head *);
+void nilfs_copy_buffer(struct buffer_head *, struct buffer_head *);
+int nilfs_page_buffers_clean(struct page *);
+void nilfs_page_bug(struct page *);
+
+int nilfs_copy_dirty_pages(struct address_space *, struct address_space *);
+void nilfs_copy_back_pages(struct address_space *, struct address_space *);
+void nilfs_clear_dirty_page(struct page *, bool);
+void nilfs_clear_dirty_pages(struct address_space *, bool);
+unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int,
+ unsigned int);
+unsigned long nilfs_find_uncommitted_extent(struct inode *inode,
+ sector_t start_blk,
+ sector_t *blkoff);
+
+#define NILFS_PAGE_BUG(page, m, a...) \
+ do { nilfs_page_bug(page); BUG(); } while (0)
+
+static inline struct buffer_head *
+nilfs_page_get_nth_block(struct page *page, unsigned int count)
+{
+ struct buffer_head *bh = page_buffers(page);
+
+ while (count-- > 0)
+ bh = bh->b_this_page;
+ get_bh(bh);
+ return bh;
+}
+
+#endif /* _NILFS_PAGE_H */