diff options
Diffstat (limited to 'fs/f2fs/data.c')
-rw-r--r-- | fs/f2fs/data.c | 810 |
1 files changed, 598 insertions, 212 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index aa3438c571fa..8e58c4cc2cb9 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -24,6 +24,193 @@ #include "segment.h" #include <trace/events/f2fs.h> +static void f2fs_read_end_io(struct bio *bio, int err) +{ + struct bio_vec *bvec; + int i; + + bio_for_each_segment_all(bvec, bio, i) { + struct page *page = bvec->bv_page; + + if (!err) { + SetPageUptodate(page); + } else { + ClearPageUptodate(page); + SetPageError(page); + } + unlock_page(page); + } + bio_put(bio); +} + +static void f2fs_write_end_io(struct bio *bio, int err) +{ + struct f2fs_sb_info *sbi = bio->bi_private; + struct bio_vec *bvec; + int i; + + bio_for_each_segment_all(bvec, bio, i) { + struct page *page = bvec->bv_page; + + if (unlikely(err)) { + set_page_dirty(page); + set_bit(AS_EIO, &page->mapping->flags); + f2fs_stop_checkpoint(sbi); + } + end_page_writeback(page); + dec_page_count(sbi, F2FS_WRITEBACK); + } + + if (sbi->wait_io) { + complete(sbi->wait_io); + sbi->wait_io = NULL; + } + + if (!get_pages(sbi, F2FS_WRITEBACK) && + !list_empty(&sbi->cp_wait.task_list)) + wake_up(&sbi->cp_wait); + + bio_put(bio); +} + +/* + * Low-level block read/write IO operations. + */ +static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, + int npages, bool is_read) +{ + struct bio *bio; + + /* No failure on bio allocation */ + bio = bio_alloc(GFP_NOIO, npages); + + bio->bi_bdev = sbi->sb->s_bdev; + bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); + bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; + bio->bi_private = sbi; + + return bio; +} + +static void __submit_merged_bio(struct f2fs_bio_info *io) +{ + struct f2fs_io_info *fio = &io->fio; + int rw; + + if (!io->bio) + return; + + rw = fio->rw; + + if (is_read_io(rw)) { + trace_f2fs_submit_read_bio(io->sbi->sb, rw, + fio->type, io->bio); + submit_bio(rw, io->bio); + } else { + trace_f2fs_submit_write_bio(io->sbi->sb, rw, + fio->type, io->bio); + /* + * META_FLUSH is only from the checkpoint procedure, and we + * should wait this metadata bio for FS consistency. + */ + if (fio->type == META_FLUSH) { + DECLARE_COMPLETION_ONSTACK(wait); + io->sbi->wait_io = &wait; + submit_bio(rw, io->bio); + wait_for_completion(&wait); + } else { + submit_bio(rw, io->bio); + } + } + + io->bio = NULL; +} + +void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, + enum page_type type, int rw) +{ + enum page_type btype = PAGE_TYPE_OF_BIO(type); + struct f2fs_bio_info *io; + + io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; + + down_write(&io->io_rwsem); + + /* change META to META_FLUSH in the checkpoint procedure */ + if (type >= META_FLUSH) { + io->fio.type = META_FLUSH; + if (test_opt(sbi, NOBARRIER)) + io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; + else + io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; + } + __submit_merged_bio(io); + up_write(&io->io_rwsem); +} + +/* + * Fill the locked page with data located in the block address. + * Return unlocked page. + */ +int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, + block_t blk_addr, int rw) +{ + struct bio *bio; + + trace_f2fs_submit_page_bio(page, blk_addr, rw); + + /* Allocate a new bio */ + bio = __bio_alloc(sbi, blk_addr, 1, is_read_io(rw)); + + if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { + bio_put(bio); + f2fs_put_page(page, 1); + return -EFAULT; + } + + submit_bio(rw, bio); + return 0; +} + +void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page, + block_t blk_addr, struct f2fs_io_info *fio) +{ + enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); + struct f2fs_bio_info *io; + bool is_read = is_read_io(fio->rw); + + io = is_read ? &sbi->read_io : &sbi->write_io[btype]; + + verify_block_addr(sbi, blk_addr); + + down_write(&io->io_rwsem); + + if (!is_read) + inc_page_count(sbi, F2FS_WRITEBACK); + + if (io->bio && (io->last_block_in_bio != blk_addr - 1 || + io->fio.rw != fio->rw)) + __submit_merged_bio(io); +alloc_new: + if (io->bio == NULL) { + int bio_blocks = MAX_BIO_BLOCKS(sbi); + + io->bio = __bio_alloc(sbi, blk_addr, bio_blocks, is_read); + io->fio = *fio; + } + + if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) < + PAGE_CACHE_SIZE) { + __submit_merged_bio(io); + goto alloc_new; + } + + io->last_block_in_bio = blk_addr; + + up_write(&io->io_rwsem); + trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, blk_addr); +} + /* * Lock ordering for the change of data block address: * ->data_page @@ -37,7 +224,7 @@ static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) struct page *node_page = dn->node_page; unsigned int ofs_in_node = dn->ofs_in_node; - f2fs_wait_on_page_writeback(node_page, NODE, false); + f2fs_wait_on_page_writeback(node_page, NODE); rn = F2FS_NODE(node_page); @@ -49,21 +236,41 @@ static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) int reserve_new_block(struct dnode_of_data *dn) { - struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); - if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)) + if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) return -EPERM; - if (!inc_valid_block_count(sbi, dn->inode, 1)) + if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) return -ENOSPC; trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); __set_data_blkaddr(dn, NEW_ADDR); dn->data_blkaddr = NEW_ADDR; + mark_inode_dirty(dn->inode); sync_inode_page(dn); return 0; } +int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) +{ + bool need_put = dn->inode_page ? false : true; + int err; + + /* if inode_page exists, index should be zero */ + f2fs_bug_on(F2FS_I_SB(dn->inode), !need_put && index); + + err = get_dnode_of_data(dn, index, ALLOC_NODE); + if (err) + return err; + + if (dn->data_blkaddr == NULL_ADDR) + err = reserve_new_block(dn); + if (err || need_put) + f2fs_put_dnode(dn); + return err; +} + static int check_extent_cache(struct inode *inode, pgoff_t pgofs, struct buffer_head *bh_result) { @@ -71,6 +278,9 @@ static int check_extent_cache(struct inode *inode, pgoff_t pgofs, pgoff_t start_fofs, end_fofs; block_t start_blkaddr; + if (is_inode_flag_set(fi, FI_NO_EXTENT)) + return 0; + read_lock(&fi->ext.ext_lock); if (fi->ext.len == 0) { read_unlock(&fi->ext.ext_lock); @@ -109,14 +319,18 @@ void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) struct f2fs_inode_info *fi = F2FS_I(dn->inode); pgoff_t fofs, start_fofs, end_fofs; block_t start_blkaddr, end_blkaddr; + int need_update = true; - f2fs_bug_on(blk_addr == NEW_ADDR); + f2fs_bug_on(F2FS_I_SB(dn->inode), blk_addr == NEW_ADDR); fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + dn->ofs_in_node; /* Update the page address in the parent node */ __set_data_blkaddr(dn, blk_addr); + if (is_inode_flag_set(fi, FI_NO_EXTENT)) + return; + write_lock(&fi->ext.ext_lock); start_fofs = fi->ext.fofs; @@ -163,19 +377,25 @@ void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) fofs - start_fofs + 1; fi->ext.len -= fofs - start_fofs + 1; } - goto end_update; + } else { + need_update = false; } - write_unlock(&fi->ext.ext_lock); - return; + /* Finally, if the extent is very fragmented, let's drop the cache. */ + if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { + fi->ext.len = 0; + set_inode_flag(fi, FI_NO_EXTENT); + need_update = true; + } end_update: write_unlock(&fi->ext.ext_lock); - sync_inode_page(dn); + if (need_update) + sync_inode_page(dn); + return; } struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) { - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); struct address_space *mapping = inode->i_mapping; struct dnode_of_data dn; struct page *page; @@ -196,10 +416,10 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) return ERR_PTR(-ENOENT); /* By fallocate(), there is no cached page, but with NEW_ADDR */ - if (dn.data_blkaddr == NEW_ADDR) + if (unlikely(dn.data_blkaddr == NEW_ADDR)) return ERR_PTR(-EINVAL); - page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); + page = grab_cache_page(mapping, index); if (!page) return ERR_PTR(-ENOMEM); @@ -208,11 +428,14 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) return page; } - err = f2fs_readpage(sbi, page, dn.data_blkaddr, + err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, dn.data_blkaddr, sync ? READ_SYNC : READA); + if (err) + return ERR_PTR(err); + if (sync) { wait_on_page_locked(page); - if (!PageUptodate(page)) { + if (unlikely(!PageUptodate(page))) { f2fs_put_page(page, 0); return ERR_PTR(-EIO); } @@ -227,14 +450,13 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) */ struct page *get_lock_data_page(struct inode *inode, pgoff_t index) { - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); struct address_space *mapping = inode->i_mapping; struct dnode_of_data dn; struct page *page; int err; repeat: - page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); + page = grab_cache_page(mapping, index); if (!page) return ERR_PTR(-ENOMEM); @@ -246,7 +468,7 @@ repeat: } f2fs_put_dnode(&dn); - if (dn.data_blkaddr == NULL_ADDR) { + if (unlikely(dn.data_blkaddr == NULL_ADDR)) { f2fs_put_page(page, 1); return ERR_PTR(-ENOENT); } @@ -266,16 +488,17 @@ repeat: return page; } - err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); + err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, + dn.data_blkaddr, READ_SYNC); if (err) return ERR_PTR(err); lock_page(page); - if (!PageUptodate(page)) { + if (unlikely(!PageUptodate(page))) { f2fs_put_page(page, 1); return ERR_PTR(-EIO); } - if (page->mapping != mapping) { + if (unlikely(page->mapping != mapping)) { f2fs_put_page(page, 1); goto repeat; } @@ -286,37 +509,28 @@ repeat: * Caller ensures that this data page is never allocated. * A new zero-filled data page is allocated in the page cache. * - * Also, caller should grab and release a mutex by calling mutex_lock_op() and - * mutex_unlock_op(). - * Note that, npage is set only by make_empty_dir. + * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and + * f2fs_unlock_op(). + * Note that, ipage is set only by make_empty_dir. */ struct page *get_new_data_page(struct inode *inode, - struct page *npage, pgoff_t index, bool new_i_size) + struct page *ipage, pgoff_t index, bool new_i_size) { - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); struct address_space *mapping = inode->i_mapping; struct page *page; struct dnode_of_data dn; int err; - set_new_dnode(&dn, inode, npage, npage, 0); - err = get_dnode_of_data(&dn, index, ALLOC_NODE); + set_new_dnode(&dn, inode, ipage, NULL, 0); + err = f2fs_reserve_block(&dn, index); if (err) return ERR_PTR(err); - - if (dn.data_blkaddr == NULL_ADDR) { - if (reserve_new_block(&dn)) { - if (!npage) - f2fs_put_dnode(&dn); - return ERR_PTR(-ENOSPC); - } - } - if (!npage) - f2fs_put_dnode(&dn); repeat: page = grab_cache_page(mapping, index); - if (!page) - return ERR_PTR(-ENOMEM); + if (!page) { + err = -ENOMEM; + goto put_err; + } if (PageUptodate(page)) return page; @@ -325,15 +539,18 @@ repeat: zero_user_segment(page, 0, PAGE_CACHE_SIZE); SetPageUptodate(page); } else { - err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); + err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, + dn.data_blkaddr, READ_SYNC); if (err) - return ERR_PTR(err); + goto put_err; + lock_page(page); - if (!PageUptodate(page)) { + if (unlikely(!PageUptodate(page))) { f2fs_put_page(page, 1); - return ERR_PTR(-EIO); + err = -EIO; + goto put_err; } - if (page->mapping != mapping) { + if (unlikely(page->mapping != mapping)) { f2fs_put_page(page, 1); goto repeat; } @@ -344,140 +561,215 @@ repeat: i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); /* Only the directory inode sets new_i_size */ set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); - mark_inode_dirty_sync(inode); } return page; + +put_err: + f2fs_put_dnode(&dn); + return ERR_PTR(err); } -static void read_end_io(struct bio *bio, int err) +static int __allocate_data_block(struct dnode_of_data *dn) { - const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); - struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; - - do { - struct page *page = bvec->bv_page; - - if (--bvec >= bio->bi_io_vec) - prefetchw(&bvec->bv_page->flags); + struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); + struct f2fs_inode_info *fi = F2FS_I(dn->inode); + struct f2fs_summary sum; + block_t new_blkaddr; + struct node_info ni; + pgoff_t fofs; + int type; - if (uptodate) { - SetPageUptodate(page); - } else { - ClearPageUptodate(page); - SetPageError(page); - } - unlock_page(page); - } while (bvec >= bio->bi_io_vec); - bio_put(bio); -} + if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) + return -EPERM; + if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) + return -ENOSPC; -/* - * Fill the locked page with data located in the block address. - * Return unlocked page. - */ -int f2fs_readpage(struct f2fs_sb_info *sbi, struct page *page, - block_t blk_addr, int type) -{ - struct block_device *bdev = sbi->sb->s_bdev; - struct bio *bio; + __set_data_blkaddr(dn, NEW_ADDR); + dn->data_blkaddr = NEW_ADDR; - trace_f2fs_readpage(page, blk_addr, type); + get_node_info(sbi, dn->nid, &ni); + set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); - down_read(&sbi->bio_sem); + type = CURSEG_WARM_DATA; - /* Allocate a new bio */ - bio = f2fs_bio_alloc(bdev, 1); + allocate_data_block(sbi, NULL, NULL_ADDR, &new_blkaddr, &sum, type); - /* Initialize the bio */ - bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); - bio->bi_end_io = read_end_io; + /* direct IO doesn't use extent cache to maximize the performance */ + set_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); + update_extent_cache(new_blkaddr, dn); + clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); - if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { - bio_put(bio); - up_read(&sbi->bio_sem); - f2fs_put_page(page, 1); - return -EFAULT; - } + /* update i_size */ + fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + + dn->ofs_in_node; + if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT)) + i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT)); - submit_bio(type, bio); - up_read(&sbi->bio_sem); + dn->data_blkaddr = new_blkaddr; return 0; } /* - * This function should be used by the data read flow only where it - * does not check the "create" flag that indicates block allocation. - * The reason for this special functionality is to exploit VFS readahead - * mechanism. + * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. + * If original data blocks are allocated, then give them to blockdev. + * Otherwise, + * a. preallocate requested block addresses + * b. do not use extent cache for better performance + * c. give the block addresses to blockdev */ -static int get_data_block_ro(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) +static int __get_data_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create, bool fiemap) { unsigned int blkbits = inode->i_sb->s_blocksize_bits; unsigned maxblocks = bh_result->b_size >> blkbits; struct dnode_of_data dn; - pgoff_t pgofs; - int err; + int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; + pgoff_t pgofs, end_offset; + int err = 0, ofs = 1; + 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)) { - trace_f2fs_get_data_block(inode, iblock, bh_result, 0); - return 0; + if (check_extent_cache(inode, pgofs, bh_result)) + goto out; + + if (create) { + f2fs_balance_fs(F2FS_I_SB(inode)); + f2fs_lock_op(F2FS_I_SB(inode)); } /* When reading holes, we need its node page */ set_new_dnode(&dn, inode, NULL, NULL, 0); - err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); + err = get_dnode_of_data(&dn, pgofs, mode); if (err) { - trace_f2fs_get_data_block(inode, iblock, bh_result, err); - return (err == -ENOENT) ? 0 : err; + if (err == -ENOENT) + err = 0; + goto unlock_out; + } + if (dn.data_blkaddr == NEW_ADDR && !fiemap) + goto put_out; + + if (dn.data_blkaddr != NULL_ADDR) { + map_bh(bh_result, inode->i_sb, dn.data_blkaddr); + } else if (create) { + err = __allocate_data_block(&dn); + if (err) + goto put_out; + allocated = true; + map_bh(bh_result, inode->i_sb, dn.data_blkaddr); + } else { + goto put_out; } - /* It does not support data allocation */ - f2fs_bug_on(create); + end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); + bh_result->b_size = (((size_t)1) << blkbits); + dn.ofs_in_node++; + pgofs++; - if (dn.data_blkaddr != NEW_ADDR && dn.data_blkaddr != NULL_ADDR) { - int i; - unsigned int end_offset; +get_next: + if (dn.ofs_in_node >= end_offset) { + if (allocated) + sync_inode_page(&dn); + allocated = false; + f2fs_put_dnode(&dn); - end_offset = IS_INODE(dn.node_page) ? - ADDRS_PER_INODE(F2FS_I(inode)) : - ADDRS_PER_BLOCK; + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, pgofs, mode); + if (err) { + if (err == -ENOENT) + err = 0; + goto unlock_out; + } + if (dn.data_blkaddr == NEW_ADDR && !fiemap) + goto put_out; - clear_buffer_new(bh_result); + end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); + } - /* Give more consecutive addresses for the read ahead */ - for (i = 0; i < end_offset - dn.ofs_in_node; i++) - if (((datablock_addr(dn.node_page, - dn.ofs_in_node + i)) - != (dn.data_blkaddr + i)) || maxblocks == i) - break; - map_bh(bh_result, inode->i_sb, dn.data_blkaddr); - bh_result->b_size = (i << blkbits); + if (maxblocks > (bh_result->b_size >> blkbits)) { + block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); + if (blkaddr == NULL_ADDR && create) { + err = __allocate_data_block(&dn); + if (err) + goto sync_out; + allocated = true; + blkaddr = dn.data_blkaddr; + } + /* Give more consecutive addresses for the readahead */ + if (blkaddr == (bh_result->b_blocknr + ofs)) { + ofs++; + dn.ofs_in_node++; + pgofs++; + bh_result->b_size += (((size_t)1) << blkbits); + goto get_next; + } } +sync_out: + if (allocated) + sync_inode_page(&dn); +put_out: f2fs_put_dnode(&dn); - trace_f2fs_get_data_block(inode, iblock, bh_result, 0); - return 0; +unlock_out: + if (create) + f2fs_unlock_op(F2FS_I_SB(inode)); +out: + trace_f2fs_get_data_block(inode, iblock, bh_result, err); + return err; +} + +static int get_data_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + return __get_data_block(inode, iblock, bh_result, create, false); +} + +static int get_data_block_fiemap(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + return __get_data_block(inode, iblock, bh_result, create, true); +} + +int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + u64 start, u64 len) +{ + return generic_block_fiemap(inode, fieinfo, + start, len, get_data_block_fiemap); } static int f2fs_read_data_page(struct file *file, struct page *page) { - return mpage_readpage(page, get_data_block_ro); + struct inode *inode = page->mapping->host; + int ret; + + trace_f2fs_readpage(page, DATA); + + /* If the file has inline data, try to read it directly */ + if (f2fs_has_inline_data(inode)) + ret = f2fs_read_inline_data(inode, page); + else + ret = mpage_readpage(page, get_data_block); + + return ret; } static int f2fs_read_data_pages(struct file *file, struct address_space *mapping, struct list_head *pages, unsigned nr_pages) { - return mpage_readpages(mapping, pages, nr_pages, get_data_block_ro); + struct inode *inode = file->f_mapping->host; + + /* If the file has inline data, skip readpages */ + if (f2fs_has_inline_data(inode)) + return 0; + + return mpage_readpages(mapping, pages, nr_pages, get_data_block); } -int do_write_data_page(struct page *page) +int do_write_data_page(struct page *page, struct f2fs_io_info *fio) { struct inode *inode = page->mapping->host; - block_t old_blk_addr, new_blk_addr; + block_t old_blkaddr, new_blkaddr; struct dnode_of_data dn; int err = 0; @@ -486,10 +778,10 @@ int do_write_data_page(struct page *page) if (err) return err; - old_blk_addr = dn.data_blkaddr; + old_blkaddr = dn.data_blkaddr; /* This page is already truncated */ - if (old_blk_addr == NULL_ADDR) + if (old_blkaddr == NULL_ADDR) goto out_writepage; set_page_writeback(page); @@ -498,15 +790,15 @@ int do_write_data_page(struct page *page) * If current allocation needs SSR, * it had better in-place writes for updated data. */ - if (unlikely(old_blk_addr != NEW_ADDR && + if (unlikely(old_blkaddr != NEW_ADDR && !is_cold_data(page) && need_inplace_update(inode))) { - rewrite_data_page(F2FS_SB(inode->i_sb), page, - old_blk_addr); + rewrite_data_page(page, old_blkaddr, fio); + set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); } else { - write_data_page(inode, page, &dn, - old_blk_addr, &new_blk_addr); - update_extent_cache(new_blk_addr, &dn); + write_data_page(page, &dn, &new_blkaddr, fio); + update_extent_cache(new_blkaddr, &dn); + set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); } out_writepage: f2fs_put_dnode(&dn); @@ -517,13 +809,19 @@ static int f2fs_write_data_page(struct page *page, struct writeback_control *wbc) { struct inode *inode = page->mapping->host; - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); loff_t i_size = i_size_read(inode); const pgoff_t end_index = ((unsigned long long) i_size) >> PAGE_CACHE_SHIFT; - unsigned offset; + unsigned offset = 0; bool need_balance_fs = false; int err = 0; + struct f2fs_io_info fio = { + .type = DATA, + .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, + }; + + trace_f2fs_writepage(page, DATA); if (page->index < end_index) goto write; @@ -533,55 +831,59 @@ static int f2fs_write_data_page(struct page *page, * this page does not have to be written to disk. */ offset = i_size & (PAGE_CACHE_SIZE - 1); - if ((page->index >= end_index + 1) || !offset) { - if (S_ISDIR(inode->i_mode)) { - dec_page_count(sbi, F2FS_DIRTY_DENTS); - inode_dec_dirty_dents(inode); - } + if ((page->index >= end_index + 1) || !offset) goto out; - } zero_user_segment(page, offset, PAGE_CACHE_SIZE); write: - if (sbi->por_doing) { - err = AOP_WRITEPAGE_ACTIVATE; + if (unlikely(sbi->por_doing)) goto redirty_out; - } /* Dentry blocks are controlled by checkpoint */ if (S_ISDIR(inode->i_mode)) { - dec_page_count(sbi, F2FS_DIRTY_DENTS); - inode_dec_dirty_dents(inode); - err = do_write_data_page(page); - } else { - f2fs_lock_op(sbi); - err = do_write_data_page(page); - f2fs_unlock_op(sbi); - need_balance_fs = true; + if (unlikely(f2fs_cp_error(sbi))) + goto redirty_out; + err = do_write_data_page(page, &fio); + goto done; } - if (err == -ENOENT) + + /* we should bypass data pages to proceed the kworkder jobs */ + if (unlikely(f2fs_cp_error(sbi))) { + SetPageError(page); + unlock_page(page); goto out; - else if (err) + } + + if (!wbc->for_reclaim) + need_balance_fs = true; + else if (has_not_enough_free_secs(sbi, 0)) goto redirty_out; - if (wbc->for_reclaim) - f2fs_submit_bio(sbi, DATA, true); + f2fs_lock_op(sbi); + if (f2fs_has_inline_data(inode) || f2fs_may_inline(inode)) + err = f2fs_write_inline_data(inode, page, offset); + else + err = do_write_data_page(page, &fio); + f2fs_unlock_op(sbi); +done: + if (err && err != -ENOENT) + goto redirty_out; clear_cold_data(page); out: + inode_dec_dirty_pages(inode); unlock_page(page); if (need_balance_fs) f2fs_balance_fs(sbi); + if (wbc->for_reclaim) + f2fs_submit_merged_bio(sbi, DATA, WRITE); return 0; redirty_out: - wbc->pages_skipped++; - set_page_dirty(page); - return err; + redirty_page_for_writepage(wbc, page); + return AOP_WRITEPAGE_ACTIVATE; } -#define MAX_DESIRED_PAGES_WP 4096 - static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, void *data) { @@ -595,20 +897,23 @@ static int f2fs_write_data_pages(struct address_space *mapping, struct writeback_control *wbc) { struct inode *inode = mapping->host; - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); bool locked = false; int ret; - long excess_nrtw = 0, desired_nrtw; + long diff; + + trace_f2fs_writepages(mapping->host, wbc, DATA); /* deal with chardevs and other special file */ if (!mapping->a_ops->writepage) return 0; - if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) { - desired_nrtw = MAX_DESIRED_PAGES_WP; - excess_nrtw = desired_nrtw - wbc->nr_to_write; - wbc->nr_to_write = desired_nrtw; - } + if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && + get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && + available_free_memory(sbi, DIRTY_DENTS)) + goto skip_write; + + diff = nr_pages_to_write(sbi, DATA, wbc); if (!S_ISDIR(inode->i_mode)) { mutex_lock(&sbi->writepages); @@ -617,12 +922,27 @@ static int f2fs_write_data_pages(struct address_space *mapping, ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); if (locked) mutex_unlock(&sbi->writepages); - f2fs_submit_bio(sbi, DATA, (wbc->sync_mode == WB_SYNC_ALL)); + + f2fs_submit_merged_bio(sbi, DATA, WRITE); remove_dirty_dir_inode(inode); - wbc->nr_to_write -= excess_nrtw; + wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); return ret; + +skip_write: + wbc->pages_skipped += get_dirty_pages(inode); + return 0; +} + +static void f2fs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, inode->i_size); + truncate_blocks(inode, inode->i_size, true); + } } static int f2fs_write_begin(struct file *file, struct address_space *mapping, @@ -630,34 +950,50 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { struct inode *inode = mapping->host; - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct page *page; pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; struct dnode_of_data dn; int err = 0; + trace_f2fs_write_begin(inode, pos, len, flags); + f2fs_balance_fs(sbi); repeat: - page = grab_cache_page_write_begin(mapping, index, flags); - if (!page) - return -ENOMEM; - *pagep = page; + err = f2fs_convert_inline_data(inode, pos + len, NULL); + if (err) + goto fail; - f2fs_lock_op(sbi); + page = grab_cache_page_write_begin(mapping, index, flags); + if (!page) { + err = -ENOMEM; + goto fail; + } - set_new_dnode(&dn, inode, NULL, NULL, 0); - err = get_dnode_of_data(&dn, index, ALLOC_NODE); - if (err) - goto err; + /* to avoid latency during memory pressure */ + unlock_page(page); - if (dn.data_blkaddr == NULL_ADDR) - err = reserve_new_block(&dn); + *pagep = page; - f2fs_put_dnode(&dn); - if (err) - goto err; + if (f2fs_has_inline_data(inode) && (pos + len) <= MAX_INLINE_DATA) + goto inline_data; + f2fs_lock_op(sbi); + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = f2fs_reserve_block(&dn, index); f2fs_unlock_op(sbi); + if (err) { + f2fs_put_page(page, 0); + goto fail; + } +inline_data: + lock_page(page); + if (unlikely(page->mapping != mapping)) { + f2fs_put_page(page, 1); + goto repeat; + } + + f2fs_wait_on_page_writeback(page, DATA); if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) return 0; @@ -674,15 +1010,26 @@ repeat: if (dn.data_blkaddr == NEW_ADDR) { zero_user_segment(page, 0, PAGE_CACHE_SIZE); } else { - err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); - if (err) - return err; + if (f2fs_has_inline_data(inode)) { + err = f2fs_read_inline_data(inode, page); + if (err) { + page_cache_release(page); + goto fail; + } + } else { + err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, + READ_SYNC); + if (err) + goto fail; + } + lock_page(page); - if (!PageUptodate(page)) { + if (unlikely(!PageUptodate(page))) { f2fs_put_page(page, 1); - return -EIO; + err = -EIO; + goto fail; } - if (page->mapping != mapping) { + if (unlikely(page->mapping != mapping)) { f2fs_put_page(page, 1); goto repeat; } @@ -691,10 +1038,8 @@ out: SetPageUptodate(page); clear_cold_data(page); return 0; - -err: - f2fs_unlock_op(sbi); - f2fs_put_page(page, 1); +fail: + f2fs_write_failed(mapping, pos + len); return err; } @@ -705,8 +1050,12 @@ static int f2fs_write_end(struct file *file, { struct inode *inode = page->mapping->host; - SetPageUptodate(page); - set_page_dirty(page); + trace_f2fs_write_end(inode, pos, len, copied); + + if (f2fs_is_atomic_file(inode) || f2fs_is_volatile_file(inode)) + register_inmem_page(inode, page); + else + set_page_dirty(page); if (pos + copied > i_size_read(inode)) { i_size_write(inode, pos + copied); @@ -714,34 +1063,64 @@ static int f2fs_write_end(struct file *file, update_inode_page(inode); } - unlock_page(page); - page_cache_release(page); + f2fs_put_page(page, 1); return copied; } +static int check_direct_IO(struct inode *inode, int rw, + struct iov_iter *iter, loff_t offset) +{ + unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; + + if (rw == READ) + return 0; + + if (offset & blocksize_mask) + return -EINVAL; + + if (iov_iter_alignment(iter) & blocksize_mask) + return -EINVAL; + + return 0; +} + static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, - const struct iovec *iov, loff_t offset, unsigned long nr_segs) + struct iov_iter *iter, loff_t offset) { struct file *file = iocb->ki_filp; - struct inode *inode = file->f_mapping->host; + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; + size_t count = iov_iter_count(iter); + int err; - if (rw == WRITE) + /* Let buffer I/O handle the inline data case. */ + if (f2fs_has_inline_data(inode)) return 0; - /* Needs synchronization with the cleaner */ - return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, - get_data_block_ro); + if (check_direct_IO(inode, rw, iter, offset)) + return 0; + + trace_f2fs_direct_IO_enter(inode, offset, count, rw); + + err = blockdev_direct_IO(rw, iocb, inode, iter, offset, get_data_block); + if (err < 0 && (rw & WRITE)) + f2fs_write_failed(mapping, offset + count); + + trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); + + return err; } static void f2fs_invalidate_data_page(struct page *page, unsigned int offset, unsigned int length) { struct inode *inode = page->mapping->host; - struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); - if (S_ISDIR(inode->i_mode) && PageDirty(page)) { - dec_page_count(sbi, F2FS_DIRTY_DENTS); - inode_dec_dirty_dents(inode); - } + + if (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE) + return; + + if (PageDirty(page)) + inode_dec_dirty_pages(inode); ClearPagePrivate(page); } @@ -759,9 +1138,11 @@ static int f2fs_set_data_page_dirty(struct page *page) trace_f2fs_set_page_dirty(page, DATA); SetPageUptodate(page); + mark_inode_dirty(inode); + if (!PageDirty(page)) { __set_page_dirty_nobuffers(page); - set_dirty_dir_page(inode, page); + update_dirty_page(inode, page); return 1; } return 0; @@ -769,7 +1150,12 @@ static int f2fs_set_data_page_dirty(struct page *page) static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) { - return generic_block_bmap(mapping, block, get_data_block_ro); + struct inode *inode = mapping->host; + + if (f2fs_has_inline_data(inode)) + return 0; + + return generic_block_bmap(mapping, block, get_data_block); } const struct address_space_operations f2fs_dblock_aops = { |