1 files changed, 97 insertions, 0 deletions
diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c
new file mode 100644
index 000000000000..cf68fcf9b552
--- /dev/null
+++ b/fs/btrfs/struct-funcs.c
@@ -0,0 +1,97 @@
+/*
+ * 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.
+ */
+#include <linux/highmem.h>
+#define BTRFS_SETGET_FUNCS(name, type, member, bits)                    \
+u##bits btrfs_##name(struct extent_buffer *eb,                          \
+                                   type *s)                             \
+{                                                                       \
+        unsigned long offset = (unsigned long)s +                       \
+                                offsetof(type, member);                 \
+        __le##bits *tmp;                                                \
+        /* ugly, but we want the fast path here */                      \
+        if (eb->map_token && offset >= eb->map_start &&                 \
+            offset + sizeof(((type *)0)->member) <= eb->map_start +     \
+            eb->map_len) {                                              \
+                tmp = (__le##bits *)(eb->kaddr + offset -               \
+                                     eb->map_start);                    \
+                return le##bits##_to_cpu(*tmp);                         \
+        }                                                               \
+        {                                                               \
+                int err;                                                \
+                char *map_token;                                        \
+                char *kaddr;                                            \
+                int unmap_on_exit = (eb->map_token == NULL);            \
+                unsigned long map_start;                                \
+                unsigned long map_len;                                  \
+                __le##bits res;                                         \
+                err = map_extent_buffer(eb, offset,                     \
+                                sizeof(((type *)0)->member),            \
+                                &map_token, &kaddr,                     \
+                                &map_start, &map_len, KM_USER1);        \
+                if (err) {                                              \
+                        read_eb_member(eb, s, type, member, &res);      \
+                        return le##bits##_to_cpu(res);                  \
+                }                                                       \
+                tmp = (__le##bits *)(kaddr + offset - map_start);       \
+                res = le##bits##_to_cpu(*tmp);                          \
+                if (unmap_on_exit)                                      \
+                        unmap_extent_buffer(eb, map_token, KM_USER1);   \
+                return res;                                             \
+        }                                                               \
+}                                                                       \
+void btrfs_set_##name(struct extent_buffer *eb,                         \
+                                    type *s, u##bits val)               \
+{                                                                       \
+        unsigned long offset = (unsigned long)s +                       \
+                                offsetof(type, member);                 \
+        __le##bits *tmp;                                                \
+        /* ugly, but we want the fast path here */                      \
+        if (eb->map_token && offset >= eb->map_start &&                 \
+            offset + sizeof(((type *)0)->member) <= eb->map_start +     \
+            eb->map_len) {                                              \
+                tmp = (__le##bits *)(eb->kaddr + offset -               \
+                                     eb->map_start);                    \
+                *tmp = cpu_to_le##bits(val);                            \
+                return;                                                 \
+        }                                                               \
+        {                                                               \
+                int err;                                                \
+                char *map_token;                                        \
+                char *kaddr;                                            \
+                int unmap_on_exit = (eb->map_token == NULL);            \
+                unsigned long map_start;                                \
+                unsigned long map_len;                                  \
+                err = map_extent_buffer(eb, offset,                     \
+                                sizeof(((type *)0)->member),            \
+                                &map_token, &kaddr,                     \
+                                &map_start, &map_len, KM_USER1);        \
+                if (err) {                                              \
+                        val = cpu_to_le##bits(val);                     \
+                        write_eb_member(eb, s, type, member, &val);     \
+                        return;                                         \
+                }                                                       \
+                tmp = (__le##bits *)(kaddr + offset - map_start);       \
+                *tmp = cpu_to_le##bits(val);                            \
+                if (unmap_on_exit)                                      \
+                        unmap_extent_buffer(eb, map_token, KM_USER1);   \
+        }                                                               \
+}
+#include "ctree.h"

diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c new file mode 100644 index 000000000000..cf68fcf9b552 --- /dev/null +++ b/fs/btrfs/struct-funcs.c
@@ -0,0 +1,97 @@
	1	/*
	2	* Copyright (C) 2007 Oracle. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public
	6	* License v2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public
	14	* License along with this program; if not, write to the
	15	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	16	* Boston, MA 021110-1307, USA.
	17	*/
	18
	19	#include <linux/highmem.h>
	20	#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
	21	u##bits btrfs_##name(struct extent_buffer *eb, \
	22	type *s) \
	23	{ \
	24	unsigned long offset = (unsigned long)s + \
	25	offsetof(type, member); \
	26	__le##bits *tmp; \
	27	/* ugly, but we want the fast path here */ \
	28	if (eb->map_token && offset >= eb->map_start && \
	29	offset + sizeof(((type *)0)->member) <= eb->map_start + \
	30	eb->map_len) { \
	31	tmp = (__le##bits *)(eb->kaddr + offset - \
	32	eb->map_start); \
	33	return le##bits##_to_cpu(*tmp); \
	34	} \
	35	{ \
	36	int err; \
	37	char *map_token; \
	38	char *kaddr; \
	39	int unmap_on_exit = (eb->map_token == NULL); \
	40	unsigned long map_start; \
	41	unsigned long map_len; \
	42	__le##bits res; \
	43	err = map_extent_buffer(eb, offset, \
	44	sizeof(((type *)0)->member), \
	45	&map_token, &kaddr, \
	46	&map_start, &map_len, KM_USER1); \
	47	if (err) { \
	48	read_eb_member(eb, s, type, member, &res); \
	49	return le##bits##_to_cpu(res); \
	50	} \
	51	tmp = (__le##bits *)(kaddr + offset - map_start); \
	52	res = le##bits##_to_cpu(*tmp); \
	53	if (unmap_on_exit) \
	54	unmap_extent_buffer(eb, map_token, KM_USER1); \
	55	return res; \
	56	} \
	57	} \
	58	void btrfs_set_##name(struct extent_buffer *eb, \
	59	type *s, u##bits val) \
	60	{ \
	61	unsigned long offset = (unsigned long)s + \
	62	offsetof(type, member); \
	63	__le##bits *tmp; \
	64	/* ugly, but we want the fast path here */ \
	65	if (eb->map_token && offset >= eb->map_start && \
	66	offset + sizeof(((type *)0)->member) <= eb->map_start + \
	67	eb->map_len) { \
	68	tmp = (__le##bits *)(eb->kaddr + offset - \
	69	eb->map_start); \
	70	*tmp = cpu_to_le##bits(val); \
	71	return; \
	72	} \
	73	{ \
	74	int err; \
	75	char *map_token; \
	76	char *kaddr; \
	77	int unmap_on_exit = (eb->map_token == NULL); \
	78	unsigned long map_start; \
	79	unsigned long map_len; \
	80	err = map_extent_buffer(eb, offset, \
	81	sizeof(((type *)0)->member), \
	82	&map_token, &kaddr, \
	83	&map_start, &map_len, KM_USER1); \
	84	if (err) { \
	85	val = cpu_to_le##bits(val); \
	86	write_eb_member(eb, s, type, member, &val); \
	87	return; \
	88	} \
	89	tmp = (__le##bits *)(kaddr + offset - map_start); \
	90	*tmp = cpu_to_le##bits(val); \
	91	if (unmap_on_exit) \
	92	unmap_extent_buffer(eb, map_token, KM_USER1); \
	93	} \
	94	}
	95
	96	#include "ctree.h"
	97