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btrfs: use write_extent_buffer() to implement write_extent_buffer_*id()

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Helpers write_extent_buffer_chunk_tree_uuid() and
write_extent_buffer_fsid(), they can be implemented by
write_extent_buffer().

These two helpers are not that frequently used, they only get called
during initialization of a new tree block.  There is not much need for
those slightly optimized versions.  And since they can be easily
converted to one write_extent_buffer() call, define them as inline
helpers.

This would make later page/folio switch much easier, as all change only
need to happen in write_extent_buffer().

Reviewed-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2023-07-15 19:08:30 +08:00 committed by David Sterba
parent cb22964f1d
commit 730c374e5b
2 changed files with 16 additions and 25 deletions
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22
fs/btrfs/extent_io.c
View file

@ -4129,28 +4129,6 @@ static void assert_eb_page_uptodate(const struct extent_buffer *eb,
}
}
void write_extent_buffer_chunk_tree_uuid(const struct extent_buffer *eb,
const void *srcv)
{
char *kaddr;
assert_eb_page_uptodate(eb, eb->pages[0]);
kaddr = page_address(eb->pages[0]) +
get_eb_offset_in_page(eb, offsetof(struct btrfs_header,
chunk_tree_uuid));
memcpy(kaddr, srcv, BTRFS_FSID_SIZE);
}
void write_extent_buffer_fsid(const struct extent_buffer *eb, const void *srcv)
{
char *kaddr;
assert_eb_page_uptodate(eb, eb->pages[0]);
kaddr = page_address(eb->pages[0]) +
get_eb_offset_in_page(eb, offsetof(struct btrfs_header, fsid));
memcpy(kaddr, srcv, BTRFS_FSID_SIZE);
}
void write_extent_buffer(const struct extent_buffer *eb, const void *srcv,
unsigned long start, unsigned long len)
{

19
fs/btrfs/extent_io.h
View file

@ -236,11 +236,24 @@ void read_extent_buffer(const struct extent_buffer *eb, void *dst,
int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
void __user *dst, unsigned long start,
unsigned long len);
void write_extent_buffer_fsid(const struct extent_buffer *eb, const void *src);
void write_extent_buffer_chunk_tree_uuid(const struct extent_buffer *eb,
const void *src);
void write_extent_buffer(const struct extent_buffer *eb, const void *src,
unsigned long start, unsigned long len);
static inline void write_extent_buffer_chunk_tree_uuid(
const struct extent_buffer *eb, const void *chunk_tree_uuid)
{
write_extent_buffer(eb, chunk_tree_uuid,
offsetof(struct btrfs_header, chunk_tree_uuid),
BTRFS_FSID_SIZE);
}
static inline void write_extent_buffer_fsid(const struct extent_buffer *eb,
const void *fsid)
{
write_extent_buffer(eb, fsid, offsetof(struct btrfs_header, fsid),
BTRFS_FSID_SIZE);
}
void copy_extent_buffer_full(const struct extent_buffer *dst,
const struct extent_buffer *src);
void copy_extent_buffer(const struct extent_buffer *dst,