diff options
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/ext4.h | 5 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 21 | ||||
| -rw-r--r-- | fs/ext4/readpage.c | 25 | ||||
| -rw-r--r-- | fs/ext4/verity.c | 35 |
4 files changed, 22 insertions, 64 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 3147bb0cf82a..15b062efcff1 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -3317,9 +3317,8 @@ static inline void ext4_set_de_type(struct super_block *sb, } /* readpages.c */ -extern int ext4_mpage_readpages(struct address_space *mapping, - struct list_head *pages, struct page *page, - unsigned nr_pages, bool is_readahead); +extern int ext4_mpage_readpages(struct inode *inode, + struct readahead_control *rac, struct page *page); extern int __init ext4_init_post_read_processing(void); extern void ext4_exit_post_read_processing(void); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2a4aae6acdcb..52be85f96159 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3224,23 +3224,20 @@ static int ext4_readpage(struct file *file, struct page *page) ret = ext4_readpage_inline(inode, page); if (ret == -EAGAIN) - return ext4_mpage_readpages(page->mapping, NULL, page, 1, - false); + return ext4_mpage_readpages(inode, NULL, page); return ret; } -static int -ext4_readpages(struct file *file, struct address_space *mapping, - struct list_head *pages, unsigned nr_pages) +static void ext4_readahead(struct readahead_control *rac) { - struct inode *inode = mapping->host; + struct inode *inode = rac->mapping->host; - /* If the file has inline data, no need to do readpages. */ + /* If the file has inline data, no need to do readahead. */ if (ext4_has_inline_data(inode)) - return 0; + return; - return ext4_mpage_readpages(mapping, pages, NULL, nr_pages, true); + ext4_mpage_readpages(inode, rac, NULL); } static void ext4_invalidatepage(struct page *page, unsigned int offset, @@ -3605,7 +3602,7 @@ static int ext4_set_page_dirty(struct page *page) static const struct address_space_operations ext4_aops = { .readpage = ext4_readpage, - .readpages = ext4_readpages, + .readahead = ext4_readahead, .writepage = ext4_writepage, .writepages = ext4_writepages, .write_begin = ext4_write_begin, @@ -3622,7 +3619,7 @@ static const struct address_space_operations ext4_aops = { static const struct address_space_operations ext4_journalled_aops = { .readpage = ext4_readpage, - .readpages = ext4_readpages, + .readahead = ext4_readahead, .writepage = ext4_writepage, .writepages = ext4_writepages, .write_begin = ext4_write_begin, @@ -3638,7 +3635,7 @@ static const struct address_space_operations ext4_journalled_aops = { static const struct address_space_operations ext4_da_aops = { .readpage = ext4_readpage, - .readpages = ext4_readpages, + .readahead = ext4_readahead, .writepage = ext4_writepage, .writepages = ext4_writepages, .write_begin = ext4_da_write_begin, diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c index c1769afbf799..5761e9961682 100644 --- a/fs/ext4/readpage.c +++ b/fs/ext4/readpage.c @@ -7,8 +7,8 @@ * * This was originally taken from fs/mpage.c * - * The intent is the ext4_mpage_readpages() function here is intended - * to replace mpage_readpages() in the general case, not just for + * The ext4_mpage_readpages() function here is intended to + * replace mpage_readahead() in the general case, not just for * encrypted files. It has some limitations (see below), where it * will fall back to read_block_full_page(), but these limitations * should only be hit when page_size != block_size. @@ -221,14 +221,12 @@ static inline loff_t ext4_readpage_limit(struct inode *inode) return i_size_read(inode); } -int ext4_mpage_readpages(struct address_space *mapping, - struct list_head *pages, struct page *page, - unsigned nr_pages, bool is_readahead) +int ext4_mpage_readpages(struct inode *inode, + struct readahead_control *rac, struct page *page) { struct bio *bio = NULL; sector_t last_block_in_bio = 0; - struct inode *inode = mapping->host; const unsigned blkbits = inode->i_blkbits; const unsigned blocks_per_page = PAGE_SIZE >> blkbits; const unsigned blocksize = 1 << blkbits; @@ -241,6 +239,7 @@ int ext4_mpage_readpages(struct address_space *mapping, int length; unsigned relative_block = 0; struct ext4_map_blocks map; + unsigned int nr_pages = rac ? readahead_count(rac) : 1; map.m_pblk = 0; map.m_lblk = 0; @@ -251,14 +250,9 @@ int ext4_mpage_readpages(struct address_space *mapping, int fully_mapped = 1; unsigned first_hole = blocks_per_page; - if (pages) { - page = lru_to_page(pages); - + if (rac) { + page = readahead_page(rac); prefetchw(&page->flags); - list_del(&page->lru); - if (add_to_page_cache_lru(page, mapping, page->index, - readahead_gfp_mask(mapping))) - goto next_page; } if (page_has_buffers(page)) @@ -381,7 +375,7 @@ int ext4_mpage_readpages(struct address_space *mapping, bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9); bio->bi_end_io = mpage_end_io; bio_set_op_attrs(bio, REQ_OP_READ, - is_readahead ? REQ_RAHEAD : 0); + rac ? REQ_RAHEAD : 0); } length = first_hole << blkbits; @@ -406,10 +400,9 @@ int ext4_mpage_readpages(struct address_space *mapping, else unlock_page(page); next_page: - if (pages) + if (rac) put_page(page); } - BUG_ON(pages && !list_empty(pages)); if (bio) submit_bio(bio); return 0; diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c index dc5ec724d889..dec1244dd062 100644 --- a/fs/ext4/verity.c +++ b/fs/ext4/verity.c @@ -342,37 +342,6 @@ static int ext4_get_verity_descriptor(struct inode *inode, void *buf, return desc_size; } -/* - * Prefetch some pages from the file's Merkle tree. - * - * This is basically a stripped-down version of __do_page_cache_readahead() - * which works on pages past i_size. - */ -static void ext4_merkle_tree_readahead(struct address_space *mapping, - pgoff_t start_index, unsigned long count) -{ - LIST_HEAD(pages); - unsigned int nr_pages = 0; - struct page *page; - pgoff_t index; - struct blk_plug plug; - - for (index = start_index; index < start_index + count; index++) { - page = xa_load(&mapping->i_pages, index); - if (!page || xa_is_value(page)) { - page = __page_cache_alloc(readahead_gfp_mask(mapping)); - if (!page) - break; - page->index = index; - list_add(&page->lru, &pages); - nr_pages++; - } - } - blk_start_plug(&plug); - ext4_mpage_readpages(mapping, &pages, NULL, nr_pages, true); - blk_finish_plug(&plug); -} - static struct page *ext4_read_merkle_tree_page(struct inode *inode, pgoff_t index, unsigned long num_ra_pages) @@ -386,8 +355,8 @@ static struct page *ext4_read_merkle_tree_page(struct inode *inode, if (page) put_page(page); else if (num_ra_pages > 1) - ext4_merkle_tree_readahead(inode->i_mapping, index, - num_ra_pages); + page_cache_readahead_unbounded(inode->i_mapping, NULL, + index, num_ra_pages, 0); page = read_mapping_page(inode->i_mapping, index, NULL); } return page; |