Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / gfs2 / bmap.h

diff --git a/kernel/fs/gfs2/bmap.h b/kernel/fs/gfs2/bmap.h
new file mode 100644 (file)
index 0000000..81ded5e
--- /dev/null
+++ b/kernel/fs/gfs2/bmap.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#ifndef __BMAP_DOT_H__
+#define __BMAP_DOT_H__
+
+#include "inode.h"
+
+struct inode;
+struct gfs2_inode;
+struct page;
+
+
+/**
+ * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file
+ * @ip: the file
+ * @len: the number of bytes to be written to the file
+ * @data_blocks: returns the number of data blocks required
+ * @ind_blocks: returns the number of indirect blocks required
+ *
+ */
+
+static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip,
+                                         unsigned int len,
+                                         unsigned int *data_blocks,
+                                         unsigned int *ind_blocks)
+{
+       const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+       unsigned int tmp;
+
+       BUG_ON(gfs2_is_dir(ip));
+       *data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3;
+       *ind_blocks = 3 * (sdp->sd_max_height - 1);
+
+       for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) {
+               tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs);
+               *ind_blocks += tmp;
+       }
+}
+
+extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page);
+extern int gfs2_block_map(struct inode *inode, sector_t lblock,
+                         struct buffer_head *bh, int create);
+extern int gfs2_extent_map(struct inode *inode, u64 lblock, int *new,
+                          u64 *dblock, unsigned *extlen);
+extern int gfs2_setattr_size(struct inode *inode, u64 size);
+extern void gfs2_trim_blocks(struct inode *inode);
+extern int gfs2_truncatei_resume(struct gfs2_inode *ip);
+extern int gfs2_file_dealloc(struct gfs2_inode *ip);
+extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
+                                    unsigned int len);
+extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
+extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
+
+#endif /* __BMAP_DOT_H__ */