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btrfs: open code extent_read_full_page to its sole caller 

This makes reading the code a tad easier by decreasing the level of
indirection by one.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2020-09-14 14:39:16 +03:00 committed by David Sterba
parent fd513000eb
commit 0f20881249
3 changed files with 15 additions and 23 deletions
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24
fs/btrfs/extent_io.c
View File

@ -3141,9 +3141,9 @@ __get_extent_map(struct inode *inode, struct page *page, size_t pg_offset,
* XXX JDM: This needs looking at to ensure proper page locking
* return 0 on success, otherwise return error
*/
static int __do_readpage(struct page *page, struct extent_map **em_cached,
struct bio **bio, unsigned long *bio_flags,
unsigned int read_flags, u64 *prev_em_start)
int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
struct bio **bio, unsigned long *bio_flags,
unsigned int read_flags, u64 *prev_em_start)
{
struct inode *inode = page->mapping->host;
u64 start = page_offset(page);
@ -3358,26 +3358,12 @@ static inline void contiguous_readpages(struct page *pages[], int nr_pages,
btrfs_lock_and_flush_ordered_range(inode, start, end, NULL);
for (index = 0; index < nr_pages; index++) {
__do_readpage(pages[index], em_cached, bio, bio_flags,
REQ_RAHEAD, prev_em_start);
btrfs_do_readpage(pages[index], em_cached, bio, bio_flags,
REQ_RAHEAD, prev_em_start);
put_page(pages[index]);
}
}
int extent_read_full_page(struct page *page, struct bio **bio,
unsigned long *bio_flags)
{
struct btrfs_inode *inode = BTRFS_I(page->mapping->host);
u64 start = page_offset(page);
u64 end = start + PAGE_SIZE - 1;
int ret;
btrfs_lock_and_flush_ordered_range(inode, start, end, NULL);
ret = __do_readpage(page, NULL, bio, bio_flags, 0, NULL);
return ret;
}
static void update_nr_written(struct writeback_control *wbc,
unsigned long nr_written)
{

5
fs/btrfs/extent_io.h
View File

@ -195,8 +195,9 @@ int try_release_extent_buffer(struct page *page);
int __must_check submit_one_bio(struct bio *bio, int mirror_num,
unsigned long bio_flags);
int extent_read_full_page(struct page *page, struct bio **bio,
unsigned long *bio_flags);
int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
struct bio **bio, unsigned long *bio_flags,
unsigned int read_flags, u64 *prev_em_start);
int extent_write_full_page(struct page *page, struct writeback_control *wbc);
int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
int mode);

9
fs/btrfs/inode.c
View File

@ -8040,11 +8040,16 @@ static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
int btrfs_readpage(struct file *file, struct page *page)
{
struct bio *bio = NULL;
struct btrfs_inode *inode = BTRFS_I(page->mapping->host);
u64 start = page_offset(page);
u64 end = start + PAGE_SIZE - 1;
unsigned long bio_flags = 0;
struct bio *bio = NULL;
int ret;
ret = extent_read_full_page(page, &bio, &bio_flags);
btrfs_lock_and_flush_ordered_range(inode, start, end, NULL);
ret = btrfs_do_readpage(page, NULL, &bio, &bio_flags, 0, NULL);
if (bio)
ret = submit_one_bio(bio, 0, bio_flags);
return ret;