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synced 2024-11-11 12:28:41 +08:00
f2fs: support swap file w/ DIO
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
parent
cad3836f9e
commit
4969c06a0d
142
fs/f2fs/data.c
142
fs/f2fs/data.c
@ -14,6 +14,7 @@
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#include <linux/pagevec.h>
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#include <linux/blkdev.h>
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#include <linux/bio.h>
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#include <linux/swap.h>
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#include <linux/prefetch.h>
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#include <linux/uio.h>
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#include <linux/cleancache.h>
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@ -54,7 +55,7 @@ static bool __is_cp_guaranteed(struct page *page)
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static enum count_type __read_io_type(struct page *page)
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{
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struct address_space *mapping = page->mapping;
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struct address_space *mapping = page_file_mapping(page);
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if (mapping) {
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struct inode *inode = mapping->host;
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@ -1585,7 +1586,7 @@ static int f2fs_read_single_page(struct inode *inode, struct page *page,
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sector_t block_nr;
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int ret = 0;
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block_in_file = (sector_t)page->index;
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block_in_file = (sector_t)page_index(page);
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last_block = block_in_file + nr_pages;
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last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
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blkbits;
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@ -1618,7 +1619,8 @@ got_it:
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block_nr = map->m_pblk + block_in_file - map->m_lblk;
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SetPageMappedToDisk(page);
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if (!PageUptodate(page) && !cleancache_get_page(page)) {
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if (!PageUptodate(page) && (!PageSwapCache(page) &&
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!cleancache_get_page(page))) {
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SetPageUptodate(page);
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goto confused;
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}
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@ -1716,7 +1718,7 @@ static int f2fs_mpage_readpages(struct address_space *mapping,
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prefetchw(&page->flags);
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list_del(&page->lru);
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if (add_to_page_cache_lru(page, mapping,
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page->index,
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page_index(page),
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readahead_gfp_mask(mapping)))
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goto next_page;
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}
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@ -1740,7 +1742,7 @@ next_page:
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static int f2fs_read_data_page(struct file *file, struct page *page)
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{
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struct inode *inode = page->mapping->host;
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struct inode *inode = page_file_mapping(page)->host;
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int ret = -EAGAIN;
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trace_f2fs_readpage(page, DATA);
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@ -1749,7 +1751,8 @@ static int f2fs_read_data_page(struct file *file, struct page *page)
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if (f2fs_has_inline_data(inode))
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ret = f2fs_read_inline_data(inode, page);
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if (ret == -EAGAIN)
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ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1, false);
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ret = f2fs_mpage_readpages(page_file_mapping(page),
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NULL, page, 1, false);
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return ret;
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}
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@ -2851,13 +2854,14 @@ int f2fs_release_page(struct page *page, gfp_t wait)
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static int f2fs_set_data_page_dirty(struct page *page)
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{
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struct address_space *mapping = page->mapping;
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struct inode *inode = mapping->host;
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struct inode *inode = page_file_mapping(page)->host;
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trace_f2fs_set_page_dirty(page, DATA);
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if (!PageUptodate(page))
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SetPageUptodate(page);
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if (PageSwapCache(page))
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return __set_page_dirty_nobuffers(page);
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if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
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if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
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@ -2949,6 +2953,126 @@ int f2fs_migrate_page(struct address_space *mapping,
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}
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#endif
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#ifdef CONFIG_SWAP
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/* Copied from generic_swapfile_activate() to check any holes */
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static int check_swap_activate(struct file *swap_file, unsigned int max)
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{
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struct address_space *mapping = swap_file->f_mapping;
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struct inode *inode = mapping->host;
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unsigned blocks_per_page;
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unsigned long page_no;
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unsigned blkbits;
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sector_t probe_block;
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sector_t last_block;
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sector_t lowest_block = -1;
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sector_t highest_block = 0;
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blkbits = inode->i_blkbits;
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blocks_per_page = PAGE_SIZE >> blkbits;
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/*
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* Map all the blocks into the extent list. This code doesn't try
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* to be very smart.
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*/
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probe_block = 0;
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page_no = 0;
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last_block = i_size_read(inode) >> blkbits;
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while ((probe_block + blocks_per_page) <= last_block && page_no < max) {
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unsigned block_in_page;
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sector_t first_block;
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cond_resched();
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first_block = bmap(inode, probe_block);
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if (first_block == 0)
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goto bad_bmap;
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/*
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* It must be PAGE_SIZE aligned on-disk
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*/
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if (first_block & (blocks_per_page - 1)) {
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probe_block++;
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goto reprobe;
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}
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for (block_in_page = 1; block_in_page < blocks_per_page;
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block_in_page++) {
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sector_t block;
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block = bmap(inode, probe_block + block_in_page);
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if (block == 0)
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goto bad_bmap;
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if (block != first_block + block_in_page) {
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/* Discontiguity */
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probe_block++;
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goto reprobe;
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}
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}
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first_block >>= (PAGE_SHIFT - blkbits);
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if (page_no) { /* exclude the header page */
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if (first_block < lowest_block)
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lowest_block = first_block;
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if (first_block > highest_block)
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highest_block = first_block;
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}
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page_no++;
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probe_block += blocks_per_page;
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reprobe:
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continue;
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}
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return 0;
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bad_bmap:
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pr_err("swapon: swapfile has holes\n");
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return -EINVAL;
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}
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static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
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sector_t *span)
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{
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struct inode *inode = file_inode(file);
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int ret;
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if (!S_ISREG(inode->i_mode))
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return -EINVAL;
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if (f2fs_readonly(F2FS_I_SB(inode)->sb))
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return -EROFS;
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ret = f2fs_convert_inline_inode(inode);
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if (ret)
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return ret;
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ret = check_swap_activate(file, sis->max);
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if (ret)
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return ret;
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set_inode_flag(inode, FI_PIN_FILE);
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f2fs_precache_extents(inode);
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f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
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return 0;
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}
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static void f2fs_swap_deactivate(struct file *file)
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{
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struct inode *inode = file_inode(file);
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clear_inode_flag(inode, FI_PIN_FILE);
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}
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#else
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static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
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sector_t *span)
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{
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return -EOPNOTSUPP;
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}
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static void f2fs_swap_deactivate(struct file *file)
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{
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}
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#endif
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const struct address_space_operations f2fs_dblock_aops = {
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.readpage = f2fs_read_data_page,
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.readpages = f2fs_read_data_pages,
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@ -2961,6 +3085,8 @@ const struct address_space_operations f2fs_dblock_aops = {
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.releasepage = f2fs_release_page,
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.direct_IO = f2fs_direct_IO,
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.bmap = f2fs_bmap,
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.swap_activate = f2fs_swap_activate,
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.swap_deactivate = f2fs_swap_deactivate,
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#ifdef CONFIG_MIGRATION
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.migratepage = f2fs_migrate_page,
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#endif
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@ -1498,7 +1498,7 @@ static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
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static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
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{
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return F2FS_M_SB(page->mapping);
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return F2FS_M_SB(page_file_mapping(page));
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}
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static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
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@ -3683,7 +3683,8 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
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if (test_opt(sbi, LFS) && (rw == WRITE) &&
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block_unaligned_IO(inode, iocb, iter))
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return true;
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if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED))
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if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED) &&
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!(inode->i_flags & S_SWAPFILE))
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return true;
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return false;
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@ -1028,8 +1028,8 @@ DECLARE_EVENT_CLASS(f2fs__submit_page_bio,
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),
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TP_fast_assign(
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__entry->dev = page->mapping->host->i_sb->s_dev;
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__entry->ino = page->mapping->host->i_ino;
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__entry->dev = page_file_mapping(page)->host->i_sb->s_dev;
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__entry->ino = page_file_mapping(page)->host->i_ino;
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__entry->index = page->index;
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__entry->old_blkaddr = fio->old_blkaddr;
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__entry->new_blkaddr = fio->new_blkaddr;
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@ -1216,10 +1216,11 @@ DECLARE_EVENT_CLASS(f2fs__page,
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),
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TP_fast_assign(
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__entry->dev = page->mapping->host->i_sb->s_dev;
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__entry->ino = page->mapping->host->i_ino;
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__entry->dev = page_file_mapping(page)->host->i_sb->s_dev;
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__entry->ino = page_file_mapping(page)->host->i_ino;
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__entry->type = type;
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__entry->dir = S_ISDIR(page->mapping->host->i_mode);
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__entry->dir =
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S_ISDIR(page_file_mapping(page)->host->i_mode);
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__entry->index = page->index;
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__entry->dirty = PageDirty(page);
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__entry->uptodate = PageUptodate(page);
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