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f2fs: add to account direct IO
This patch adds f2fs_dio_submit_bio() to hook submit_io/end_io functions in direct IO path, in order to account DIO. Later, we will add this count into is_idle() to let background GC/Discard thread be aware of DIO. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -2548,6 +2548,53 @@ static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
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return 0;
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}
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static void f2fs_dio_end_io(struct bio *bio)
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{
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struct f2fs_private_dio *dio = bio->bi_private;
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dec_page_count(F2FS_I_SB(dio->inode),
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dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
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bio->bi_private = dio->orig_private;
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bio->bi_end_io = dio->orig_end_io;
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kfree(dio);
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bio_endio(bio);
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}
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static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
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loff_t file_offset)
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{
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struct f2fs_private_dio *dio;
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bool write = (bio_op(bio) == REQ_OP_WRITE);
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int err;
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dio = f2fs_kzalloc(F2FS_I_SB(inode),
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sizeof(struct f2fs_private_dio), GFP_NOFS);
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if (!dio) {
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err = -ENOMEM;
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goto out;
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}
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dio->inode = inode;
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dio->orig_end_io = bio->bi_end_io;
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dio->orig_private = bio->bi_private;
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dio->write = write;
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bio->bi_end_io = f2fs_dio_end_io;
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bio->bi_private = dio;
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inc_page_count(F2FS_I_SB(inode),
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write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
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submit_bio(bio);
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return;
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out:
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bio->bi_status = BLK_STS_IOERR;
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bio_endio(bio);
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}
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static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
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{
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struct address_space *mapping = iocb->ki_filp->f_mapping;
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@ -2594,7 +2641,9 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
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down_read(&fi->i_gc_rwsem[READ]);
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}
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err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio);
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err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
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iter, get_data_block_dio, NULL, f2fs_dio_submit_bio,
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DIO_LOCKING | DIO_SKIP_HOLES);
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if (do_opu)
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up_read(&fi->i_gc_rwsem[READ]);
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@ -53,6 +53,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
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si->vw_cnt = atomic_read(&sbi->vw_cnt);
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si->max_aw_cnt = atomic_read(&sbi->max_aw_cnt);
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si->max_vw_cnt = atomic_read(&sbi->max_vw_cnt);
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si->nr_dio_read = get_pages(sbi, F2FS_DIO_READ);
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si->nr_dio_write = get_pages(sbi, F2FS_DIO_WRITE);
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si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
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si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
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si->nr_rd_data = get_pages(sbi, F2FS_RD_DATA);
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@ -374,6 +376,8 @@ static int stat_show(struct seq_file *s, void *v)
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seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n",
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si->ext_tree, si->zombie_tree, si->ext_node);
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seq_puts(s, "\nBalancing F2FS Async:\n");
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seq_printf(s, " - DIO (R: %4d, W: %4d)\n",
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si->nr_dio_read, si->nr_dio_write);
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seq_printf(s, " - IO_R (Data: %4d, Node: %4d, Meta: %4d\n",
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si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta);
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seq_printf(s, " - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), "
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@ -957,6 +957,8 @@ enum count_type {
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F2FS_RD_DATA,
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F2FS_RD_NODE,
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F2FS_RD_META,
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F2FS_DIO_WRITE,
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F2FS_DIO_READ,
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NR_COUNT_TYPE,
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};
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@ -1333,6 +1335,13 @@ struct f2fs_sb_info {
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__u32 s_chksum_seed;
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};
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struct f2fs_private_dio {
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struct inode *inode;
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void *orig_private;
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bio_end_io_t *orig_end_io;
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bool write;
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};
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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#define f2fs_show_injection_info(type) \
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printk_ratelimited("%sF2FS-fs : inject %s in %s of %pF\n", \
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@ -3152,6 +3161,7 @@ struct f2fs_stat_info {
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int total_count, utilization;
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int bg_gc, nr_wb_cp_data, nr_wb_data;
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int nr_rd_data, nr_rd_node, nr_rd_meta;
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int nr_dio_read, nr_dio_write;
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unsigned int io_skip_bggc, other_skip_bggc;
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int nr_flushing, nr_flushed, flush_list_empty;
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int nr_discarding, nr_discarded;
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