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authorChris Mason <chris.mason@oracle.com>2008-03-04 11:16:54 -0500
committerDavid Woodhouse <dwmw2@hera.kernel.org>2008-03-04 11:16:54 -0500
commit80791984f6febfe91a193efd27a5bc75c4d56073 (patch)
tree329e137d3166815cd014e39e0550f28832ab3320 /extent_io.h
parent79599947bf7ab8720a127a90d731048189678f83 (diff)
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Rename the extent_map code to extent_io
This mirrors the changes in the kernel code.
Diffstat (limited to 'extent_io.h')
-rw-r--r--extent_io.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/extent_io.h b/extent_io.h
new file mode 100644
index 0000000..2bd4179
--- /dev/null
+++ b/extent_io.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2007 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __EXTENTMAP__
+#define __EXTENTMAP__
+#include "kerncompat.h"
+#include "extent-cache.h"
+#include "list.h"
+
+#define EXTENT_DIRTY 1
+#define EXTENT_WRITEBACK (1 << 1)
+#define EXTENT_UPTODATE (1 << 2)
+#define EXTENT_LOCKED (1 << 3)
+#define EXTENT_NEW (1 << 4)
+#define EXTENT_DELALLOC (1 << 5)
+#define EXTENT_DEFRAG (1 << 6)
+#define EXTENT_DEFRAG_DONE (1 << 7)
+#define EXTENT_BUFFER_FILLED (1 << 8)
+#define EXTENT_CSUM (1 << 9)
+#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
+
+struct extent_io_tree {
+ struct cache_tree state;
+ struct cache_tree cache;
+ struct list_head lru;
+ u64 cache_size;
+};
+
+struct extent_state {
+ struct cache_extent cache_node;
+ u64 start;
+ u64 end;
+ int refs;
+ unsigned long state;
+ u64 private;
+};
+
+struct extent_buffer {
+ struct cache_extent cache_node;
+ u64 start;
+ u64 dev_bytenr;
+ u32 len;
+ struct extent_io_tree *tree;
+ struct list_head lru;
+ int refs;
+ int flags;
+ int fd;
+ char data[];
+};
+
+static inline void extent_buffer_get(struct extent_buffer *eb)
+{
+ eb->refs++;
+}
+
+void extent_io_tree_init(struct extent_io_tree *tree);
+void extent_io_tree_cleanup(struct extent_io_tree *tree);
+int set_extent_bits(struct extent_io_tree *tree, u64 start,
+ u64 end, int bits, gfp_t mask);
+int clear_extent_bits(struct extent_io_tree *tree, u64 start,
+ u64 end, int bits, gfp_t mask);
+int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
+ u64 *start_ret, u64 *end_ret, int bits);
+int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
+ int bits, int filled);
+int set_extent_dirty(struct extent_io_tree *tree, u64 start,
+ u64 end, gfp_t mask);
+int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
+ u64 end, gfp_t mask);
+int extent_buffer_uptodate(struct extent_buffer *eb);
+int set_extent_buffer_uptodate(struct extent_buffer *eb);
+int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
+int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
+struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
+ u64 bytenr, u32 blocksize);
+struct extent_buffer *find_first_extent_buffer(struct extent_io_tree *tree,
+ u64 start);
+struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
+ u64 bytenr, u32 blocksize);
+void free_extent_buffer(struct extent_buffer *eb);
+int read_extent_from_disk(struct extent_buffer *eb);
+int write_extent_to_disk(struct extent_buffer *eb);
+int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
+ unsigned long start, unsigned long len);
+void read_extent_buffer(struct extent_buffer *eb, void *dst,
+ unsigned long start, unsigned long len);
+void write_extent_buffer(struct extent_buffer *eb, const void *src,
+ unsigned long start, unsigned long len);
+void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
+ unsigned long dst_offset, unsigned long src_offset,
+ unsigned long len);
+void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
+ unsigned long src_offset, unsigned long len);
+void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
+ unsigned long src_offset, unsigned long len);
+void memset_extent_buffer(struct extent_buffer *eb, char c,
+ unsigned long start, unsigned long len);
+int set_extent_buffer_dirty(struct extent_buffer *eb);
+int clear_extent_buffer_dirty(struct extent_buffer *eb);
+#endif