btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
file-item.o inode-item.o disk-io.o \
transaction.o inode.o file.o tree-defrag.o \
- extent_map.o sysfs.o struct-funcs.o xattr.o ordered-data.o \
+ extent_map.o sysfs.o accessors.o xattr.o ordered-data.o \
extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \
export.o tree-log.o free-space-cache.o zlib.o lzo.o zstd.o \
compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2007 Oracle. All rights reserved.
+ */
+
+#include <asm/unaligned.h>
+#include "messages.h"
+#include "ctree.h"
+
+static bool check_setget_bounds(const struct extent_buffer *eb,
+ const void *ptr, unsigned off, int size)
+{
+ const unsigned long member_offset = (unsigned long)ptr + off;
+
+ if (unlikely(member_offset + size > eb->len)) {
+ btrfs_warn(eb->fs_info,
+ "bad eb member %s: ptr 0x%lx start %llu member offset %lu size %d",
+ (member_offset > eb->len ? "start" : "end"),
+ (unsigned long)ptr, eb->start, member_offset, size);
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * Macro templates that define helpers to read/write extent buffer data of a
+ * given size, that are also used via ctree.h for access to item members by
+ * specialized helpers.
+ *
+ * Generic helpers:
+ * - btrfs_set_8 (for 8/16/32/64)
+ * - btrfs_get_8 (for 8/16/32/64)
+ *
+ * Generic helpers with a token (cached address of the most recently accessed
+ * page):
+ * - btrfs_set_token_8 (for 8/16/32/64)
+ * - btrfs_get_token_8 (for 8/16/32/64)
+ *
+ * The set/get functions handle data spanning two pages transparently, in case
+ * metadata block size is larger than page. Every pointer to metadata items is
+ * an offset into the extent buffer page array, cast to a specific type. This
+ * gives us all the type checking.
+ *
+ * The extent buffer pages stored in the array pages do not form a contiguous
+ * phyusical range, but the API functions assume the linear offset to the range
+ * from 0 to metadata node size.
+ */
+
+#define DEFINE_BTRFS_SETGET_BITS(bits) \
+u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
+ const void *ptr, unsigned long off) \
+{ \
+ const unsigned long member_offset = (unsigned long)ptr + off; \
+ const unsigned long idx = get_eb_page_index(member_offset); \
+ const unsigned long oip = get_eb_offset_in_page(token->eb, \
+ member_offset); \
+ const int size = sizeof(u##bits); \
+ u8 lebytes[sizeof(u##bits)]; \
+ const int part = PAGE_SIZE - oip; \
+ \
+ ASSERT(token); \
+ ASSERT(token->kaddr); \
+ ASSERT(check_setget_bounds(token->eb, ptr, off, size)); \
+ if (token->offset <= member_offset && \
+ member_offset + size <= token->offset + PAGE_SIZE) { \
+ return get_unaligned_le##bits(token->kaddr + oip); \
+ } \
+ token->kaddr = page_address(token->eb->pages[idx]); \
+ token->offset = idx << PAGE_SHIFT; \
+ if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE ) \
+ return get_unaligned_le##bits(token->kaddr + oip); \
+ \
+ memcpy(lebytes, token->kaddr + oip, part); \
+ token->kaddr = page_address(token->eb->pages[idx + 1]); \
+ token->offset = (idx + 1) << PAGE_SHIFT; \
+ memcpy(lebytes + part, token->kaddr, size - part); \
+ return get_unaligned_le##bits(lebytes); \
+} \
+u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
+ const void *ptr, unsigned long off) \
+{ \
+ const unsigned long member_offset = (unsigned long)ptr + off; \
+ const unsigned long oip = get_eb_offset_in_page(eb, member_offset); \
+ const unsigned long idx = get_eb_page_index(member_offset); \
+ char *kaddr = page_address(eb->pages[idx]); \
+ const int size = sizeof(u##bits); \
+ const int part = PAGE_SIZE - oip; \
+ u8 lebytes[sizeof(u##bits)]; \
+ \
+ ASSERT(check_setget_bounds(eb, ptr, off, size)); \
+ if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE) \
+ return get_unaligned_le##bits(kaddr + oip); \
+ \
+ memcpy(lebytes, kaddr + oip, part); \
+ kaddr = page_address(eb->pages[idx + 1]); \
+ memcpy(lebytes + part, kaddr, size - part); \
+ return get_unaligned_le##bits(lebytes); \
+} \
+void btrfs_set_token_##bits(struct btrfs_map_token *token, \
+ const void *ptr, unsigned long off, \
+ u##bits val) \
+{ \
+ const unsigned long member_offset = (unsigned long)ptr + off; \
+ const unsigned long idx = get_eb_page_index(member_offset); \
+ const unsigned long oip = get_eb_offset_in_page(token->eb, \
+ member_offset); \
+ const int size = sizeof(u##bits); \
+ u8 lebytes[sizeof(u##bits)]; \
+ const int part = PAGE_SIZE - oip; \
+ \
+ ASSERT(token); \
+ ASSERT(token->kaddr); \
+ ASSERT(check_setget_bounds(token->eb, ptr, off, size)); \
+ if (token->offset <= member_offset && \
+ member_offset + size <= token->offset + PAGE_SIZE) { \
+ put_unaligned_le##bits(val, token->kaddr + oip); \
+ return; \
+ } \
+ token->kaddr = page_address(token->eb->pages[idx]); \
+ token->offset = idx << PAGE_SHIFT; \
+ if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE) { \
+ put_unaligned_le##bits(val, token->kaddr + oip); \
+ return; \
+ } \
+ put_unaligned_le##bits(val, lebytes); \
+ memcpy(token->kaddr + oip, lebytes, part); \
+ token->kaddr = page_address(token->eb->pages[idx + 1]); \
+ token->offset = (idx + 1) << PAGE_SHIFT; \
+ memcpy(token->kaddr, lebytes + part, size - part); \
+} \
+void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
+ unsigned long off, u##bits val) \
+{ \
+ const unsigned long member_offset = (unsigned long)ptr + off; \
+ const unsigned long oip = get_eb_offset_in_page(eb, member_offset); \
+ const unsigned long idx = get_eb_page_index(member_offset); \
+ char *kaddr = page_address(eb->pages[idx]); \
+ const int size = sizeof(u##bits); \
+ const int part = PAGE_SIZE - oip; \
+ u8 lebytes[sizeof(u##bits)]; \
+ \
+ ASSERT(check_setget_bounds(eb, ptr, off, size)); \
+ if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE) { \
+ put_unaligned_le##bits(val, kaddr + oip); \
+ return; \
+ } \
+ \
+ put_unaligned_le##bits(val, lebytes); \
+ memcpy(kaddr + oip, lebytes, part); \
+ kaddr = page_address(eb->pages[idx + 1]); \
+ memcpy(kaddr, lebytes + part, size - part); \
+}
+
+DEFINE_BTRFS_SETGET_BITS(8)
+DEFINE_BTRFS_SETGET_BITS(16)
+DEFINE_BTRFS_SETGET_BITS(32)
+DEFINE_BTRFS_SETGET_BITS(64)
+
+void btrfs_node_key(const struct extent_buffer *eb,
+ struct btrfs_disk_key *disk_key, int nr)
+{
+ unsigned long ptr = btrfs_node_key_ptr_offset(nr);
+ read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
+ struct btrfs_key_ptr, key, disk_key);
+}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2007 Oracle. All rights reserved.
- */
-
-#include <asm/unaligned.h>
-
-#include "messages.h"
-#include "ctree.h"
-
-static bool check_setget_bounds(const struct extent_buffer *eb,
- const void *ptr, unsigned off, int size)
-{
- const unsigned long member_offset = (unsigned long)ptr + off;
-
- if (unlikely(member_offset + size > eb->len)) {
- btrfs_warn(eb->fs_info,
- "bad eb member %s: ptr 0x%lx start %llu member offset %lu size %d",
- (member_offset > eb->len ? "start" : "end"),
- (unsigned long)ptr, eb->start, member_offset, size);
- return false;
- }
-
- return true;
-}
-
-/*
- * Macro templates that define helpers to read/write extent buffer data of a
- * given size, that are also used via ctree.h for access to item members by
- * specialized helpers.
- *
- * Generic helpers:
- * - btrfs_set_8 (for 8/16/32/64)
- * - btrfs_get_8 (for 8/16/32/64)
- *
- * Generic helpers with a token (cached address of the most recently accessed
- * page):
- * - btrfs_set_token_8 (for 8/16/32/64)
- * - btrfs_get_token_8 (for 8/16/32/64)
- *
- * The set/get functions handle data spanning two pages transparently, in case
- * metadata block size is larger than page. Every pointer to metadata items is
- * an offset into the extent buffer page array, cast to a specific type. This
- * gives us all the type checking.
- *
- * The extent buffer pages stored in the array pages do not form a contiguous
- * phyusical range, but the API functions assume the linear offset to the range
- * from 0 to metadata node size.
- */
-
-#define DEFINE_BTRFS_SETGET_BITS(bits) \
-u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
- const void *ptr, unsigned long off) \
-{ \
- const unsigned long member_offset = (unsigned long)ptr + off; \
- const unsigned long idx = get_eb_page_index(member_offset); \
- const unsigned long oip = get_eb_offset_in_page(token->eb, \
- member_offset); \
- const int size = sizeof(u##bits); \
- u8 lebytes[sizeof(u##bits)]; \
- const int part = PAGE_SIZE - oip; \
- \
- ASSERT(token); \
- ASSERT(token->kaddr); \
- ASSERT(check_setget_bounds(token->eb, ptr, off, size)); \
- if (token->offset <= member_offset && \
- member_offset + size <= token->offset + PAGE_SIZE) { \
- return get_unaligned_le##bits(token->kaddr + oip); \
- } \
- token->kaddr = page_address(token->eb->pages[idx]); \
- token->offset = idx << PAGE_SHIFT; \
- if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE ) \
- return get_unaligned_le##bits(token->kaddr + oip); \
- \
- memcpy(lebytes, token->kaddr + oip, part); \
- token->kaddr = page_address(token->eb->pages[idx + 1]); \
- token->offset = (idx + 1) << PAGE_SHIFT; \
- memcpy(lebytes + part, token->kaddr, size - part); \
- return get_unaligned_le##bits(lebytes); \
-} \
-u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
- const void *ptr, unsigned long off) \
-{ \
- const unsigned long member_offset = (unsigned long)ptr + off; \
- const unsigned long oip = get_eb_offset_in_page(eb, member_offset); \
- const unsigned long idx = get_eb_page_index(member_offset); \
- char *kaddr = page_address(eb->pages[idx]); \
- const int size = sizeof(u##bits); \
- const int part = PAGE_SIZE - oip; \
- u8 lebytes[sizeof(u##bits)]; \
- \
- ASSERT(check_setget_bounds(eb, ptr, off, size)); \
- if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE) \
- return get_unaligned_le##bits(kaddr + oip); \
- \
- memcpy(lebytes, kaddr + oip, part); \
- kaddr = page_address(eb->pages[idx + 1]); \
- memcpy(lebytes + part, kaddr, size - part); \
- return get_unaligned_le##bits(lebytes); \
-} \
-void btrfs_set_token_##bits(struct btrfs_map_token *token, \
- const void *ptr, unsigned long off, \
- u##bits val) \
-{ \
- const unsigned long member_offset = (unsigned long)ptr + off; \
- const unsigned long idx = get_eb_page_index(member_offset); \
- const unsigned long oip = get_eb_offset_in_page(token->eb, \
- member_offset); \
- const int size = sizeof(u##bits); \
- u8 lebytes[sizeof(u##bits)]; \
- const int part = PAGE_SIZE - oip; \
- \
- ASSERT(token); \
- ASSERT(token->kaddr); \
- ASSERT(check_setget_bounds(token->eb, ptr, off, size)); \
- if (token->offset <= member_offset && \
- member_offset + size <= token->offset + PAGE_SIZE) { \
- put_unaligned_le##bits(val, token->kaddr + oip); \
- return; \
- } \
- token->kaddr = page_address(token->eb->pages[idx]); \
- token->offset = idx << PAGE_SHIFT; \
- if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE) { \
- put_unaligned_le##bits(val, token->kaddr + oip); \
- return; \
- } \
- put_unaligned_le##bits(val, lebytes); \
- memcpy(token->kaddr + oip, lebytes, part); \
- token->kaddr = page_address(token->eb->pages[idx + 1]); \
- token->offset = (idx + 1) << PAGE_SHIFT; \
- memcpy(token->kaddr, lebytes + part, size - part); \
-} \
-void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
- unsigned long off, u##bits val) \
-{ \
- const unsigned long member_offset = (unsigned long)ptr + off; \
- const unsigned long oip = get_eb_offset_in_page(eb, member_offset); \
- const unsigned long idx = get_eb_page_index(member_offset); \
- char *kaddr = page_address(eb->pages[idx]); \
- const int size = sizeof(u##bits); \
- const int part = PAGE_SIZE - oip; \
- u8 lebytes[sizeof(u##bits)]; \
- \
- ASSERT(check_setget_bounds(eb, ptr, off, size)); \
- if (INLINE_EXTENT_BUFFER_PAGES == 1 || oip + size <= PAGE_SIZE) { \
- put_unaligned_le##bits(val, kaddr + oip); \
- return; \
- } \
- \
- put_unaligned_le##bits(val, lebytes); \
- memcpy(kaddr + oip, lebytes, part); \
- kaddr = page_address(eb->pages[idx + 1]); \
- memcpy(kaddr, lebytes + part, size - part); \
-}
-
-DEFINE_BTRFS_SETGET_BITS(8)
-DEFINE_BTRFS_SETGET_BITS(16)
-DEFINE_BTRFS_SETGET_BITS(32)
-DEFINE_BTRFS_SETGET_BITS(64)
-
-void btrfs_node_key(const struct extent_buffer *eb,
- struct btrfs_disk_key *disk_key, int nr)
-{
- unsigned long ptr = btrfs_node_key_ptr_offset(nr);
- read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
- struct btrfs_key_ptr, key, disk_key);
-}
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