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author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2012-12-10 09:26:05 +0900 |
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committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2012-12-11 13:43:45 +0900 |
commit | 3cd8a23948b29301f8f67b8d70c5c18fabbc05e1 (patch) | |
tree | e4d9c11d55446e547b4a7830d733126f17ef3e37 /fs/f2fs | |
parent | 457d08ee4fd91c8df17917ff2d32565e6adacbfc (diff) | |
download | op-kernel-dev-3cd8a23948b29301f8f67b8d70c5c18fabbc05e1.zip op-kernel-dev-3cd8a23948b29301f8f67b8d70c5c18fabbc05e1.tar.gz |
f2fs: cleanup the f2fs_bio_alloc routine
Do cleanup more for better code readability.
- Change the parameter set of f2fs_bio_alloc()
This function should allocate a bio only since it is not something like
f2fs_bio_init(). Instead, the caller should initialize the allocated bio.
- Introduce SECTOR_FROM_BLOCK
This macro translates a block address to its sector address.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
Diffstat (limited to 'fs/f2fs')
-rw-r--r-- | fs/f2fs/data.c | 5 | ||||
-rw-r--r-- | fs/f2fs/f2fs.h | 2 | ||||
-rw-r--r-- | fs/f2fs/segment.c | 33 | ||||
-rw-r--r-- | fs/f2fs/segment.h | 3 |
4 files changed, 25 insertions, 18 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 444c2a6..655aeab 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -343,11 +343,12 @@ int f2fs_readpage(struct f2fs_sb_info *sbi, struct page *page, down_read(&sbi->bio_sem); /* Allocate a new bio */ - bio = f2fs_bio_alloc(bdev, blk_addr << (sbi->log_blocksize - 9), - 1, GFP_NOFS | __GFP_HIGH); + bio = f2fs_bio_alloc(bdev, 1); /* Initialize the bio */ + bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); bio->bi_end_io = read_end_io; + if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { kfree(bio->bi_private); bio_put(bio); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8c3f1ef..2bce3a6 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -924,7 +924,7 @@ void clear_prefree_segments(struct f2fs_sb_info *); int npages_for_summary_flush(struct f2fs_sb_info *); void allocate_new_segments(struct f2fs_sb_info *); struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); -struct bio *f2fs_bio_alloc(struct block_device *, sector_t, int, gfp_t); +struct bio *f2fs_bio_alloc(struct block_device *, int); void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync); int write_meta_page(struct f2fs_sb_info *, struct page *, struct writeback_control *); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 8894b39..1b26e4e 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -643,23 +643,21 @@ static void f2fs_end_io_write(struct bio *bio, int err) bio_put(bio); } -struct bio *f2fs_bio_alloc(struct block_device *bdev, sector_t first_sector, - int nr_vecs, gfp_t gfp_flags) +struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages) { struct bio *bio; - - /* allocate new bio */ - bio = bio_alloc(gfp_flags, nr_vecs); - - bio->bi_bdev = bdev; - bio->bi_sector = first_sector; + struct bio_private *priv; retry: - bio->bi_private = kmalloc(sizeof(struct bio_private), - GFP_NOFS | __GFP_HIGH); - if (!bio->bi_private) { + priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); + if (!priv) { cond_resched(); goto retry; } + + /* No failure on bio allocation */ + bio = bio_alloc(GFP_NOIO, npages); + bio->bi_bdev = bdev; + bio->bi_private = priv; return bio; } @@ -711,10 +709,15 @@ static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1) do_submit_bio(sbi, type, false); alloc_new: - if (sbi->bio[type] == NULL) - sbi->bio[type] = f2fs_bio_alloc(bdev, - blk_addr << (sbi->log_blocksize - 9), - bio_get_nr_vecs(bdev), GFP_NOFS | __GFP_HIGH); + if (sbi->bio[type] == NULL) { + sbi->bio[type] = f2fs_bio_alloc(bdev, bio_get_nr_vecs(bdev)); + sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); + /* + * The end_io will be assigned at the sumbission phase. + * Until then, let bio_add_page() merge consecutive IOs as much + * as possible. + */ + } if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 2c445f8..0948405 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -82,6 +82,9 @@ (BITS_TO_LONGS(nr) * sizeof(unsigned long)) #define TOTAL_SEGS(sbi) (SM_I(sbi)->main_segments) +#define SECTOR_FROM_BLOCK(sbi, blk_addr) \ + (blk_addr << ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE)) + /* during checkpoint, bio_private is used to synchronize the last bio */ struct bio_private { struct f2fs_sb_info *sbi; |