diff options
| -rw-r--r-- | fs/f2fs/data.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 64f9049a9f25..bce0372a90d4 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -248,8 +248,23 @@ int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) return err; } +static void f2fs_map_bh(struct super_block *sb, pgoff_t pgofs, + struct extent_info *ei, struct buffer_head *bh_result) +{ + unsigned int blkbits = sb->s_blocksize_bits; + size_t count; + + set_buffer_new(bh_result); + map_bh(bh_result, sb, ei->blk + pgofs - ei->fofs); + count = ei->fofs + ei->len - pgofs; + if (count < (UINT_MAX >> blkbits)) + bh_result->b_size = (count << blkbits); + else + bh_result->b_size = UINT_MAX; +} + static int check_extent_cache(struct inode *inode, pgoff_t pgofs, - struct buffer_head *bh_result) + struct extent_info *ei) { struct f2fs_inode_info *fi = F2FS_I(inode); pgoff_t start_fofs, end_fofs; @@ -271,18 +286,7 @@ static int check_extent_cache(struct inode *inode, pgoff_t pgofs, start_blkaddr = fi->ext.blk; if (pgofs >= start_fofs && pgofs <= end_fofs) { - unsigned int blkbits = inode->i_sb->s_blocksize_bits; - size_t count; - - set_buffer_new(bh_result); - map_bh(bh_result, inode->i_sb, - start_blkaddr + pgofs - start_fofs); - count = end_fofs - pgofs + 1; - if (count < (UINT_MAX >> blkbits)) - bh_result->b_size = (count << blkbits); - else - bh_result->b_size = UINT_MAX; - + *ei = fi->ext; stat_inc_read_hit(inode->i_sb); read_unlock(&fi->ext_lock); return 1; @@ -658,13 +662,16 @@ static int __get_data_block(struct inode *inode, sector_t iblock, int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; pgoff_t pgofs, end_offset; int err = 0, ofs = 1; + struct extent_info ei; bool allocated = false; /* Get the page offset from the block offset(iblock) */ pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); - if (check_extent_cache(inode, pgofs, bh_result)) + if (check_extent_cache(inode, pgofs, &ei)) { + f2fs_map_bh(inode->i_sb, pgofs, &ei, bh_result); goto out; + } if (create) f2fs_lock_op(F2FS_I_SB(inode)); |