--- /dev/null
+/*
+ * fs/f2fs/checkpoint.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/bio.h>
+#include <linux/mpage.h>
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+#include <linux/f2fs_fs.h>
+#include <linux/pagevec.h>
+#include <linux/swap.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+#include "trace.h"
+#include <trace/events/f2fs.h>
+
+static struct kmem_cache *ino_entry_slab;
+struct kmem_cache *inode_entry_slab;
+
+/*
+ * We guarantee no failure on the returned page.
+ */
+struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct address_space *mapping = META_MAPPING(sbi);
+ struct page *page = NULL;
+repeat:
+ page = grab_cache_page(mapping, index);
+ if (!page) {
+ cond_resched();
+ goto repeat;
+ }
+ f2fs_wait_on_page_writeback(page, META);
+ SetPageUptodate(page);
+ return page;
+}
+
+/*
+ * We guarantee no failure on the returned page.
+ */
+struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct address_space *mapping = META_MAPPING(sbi);
+ struct page *page;
+ struct f2fs_io_info fio = {
+ .type = META,
+ .rw = READ_SYNC | REQ_META | REQ_PRIO,
+ .blk_addr = index,
+ };
+repeat:
+ page = grab_cache_page(mapping, index);
+ if (!page) {
+ cond_resched();
+ goto repeat;
+ }
+ if (PageUptodate(page))
+ goto out;
+
+ if (f2fs_submit_page_bio(sbi, page, &fio))
+ goto repeat;
+
+ lock_page(page);
+ if (unlikely(page->mapping != mapping)) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+out:
+ return page;
+}
+
+static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
+ block_t blkaddr, int type)
+{
+ switch (type) {
+ case META_NAT:
+ break;
+ case META_SIT:
+ if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
+ return false;
+ break;
+ case META_SSA:
+ if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
+ blkaddr < SM_I(sbi)->ssa_blkaddr))
+ return false;
+ break;
+ case META_CP:
+ if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
+ blkaddr < __start_cp_addr(sbi)))
+ return false;
+ break;
+ case META_POR:
+ if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
+ blkaddr < MAIN_BLKADDR(sbi)))
+ return false;
+ break;
+ default:
+ BUG();
+ }
+
+ return true;
+}
+
+/*
+ * Readahead CP/NAT/SIT/SSA pages
+ */
+int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type)
+{
+ block_t prev_blk_addr = 0;
+ struct page *page;
+ block_t blkno = start;
+ struct f2fs_io_info fio = {
+ .type = META,
+ .rw = READ_SYNC | REQ_META | REQ_PRIO
+ };
+
+ for (; nrpages-- > 0; blkno++) {
+
+ if (!is_valid_blkaddr(sbi, blkno, type))
+ goto out;
+
+ switch (type) {
+ case META_NAT:
+ if (unlikely(blkno >=
+ NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
+ blkno = 0;
+ /* get nat block addr */
+ fio.blk_addr = current_nat_addr(sbi,
+ blkno * NAT_ENTRY_PER_BLOCK);
+ break;
+ case META_SIT:
+ /* get sit block addr */
+ fio.blk_addr = current_sit_addr(sbi,
+ blkno * SIT_ENTRY_PER_BLOCK);
+ if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
+ goto out;
+ prev_blk_addr = fio.blk_addr;
+ break;
+ case META_SSA:
+ case META_CP:
+ case META_POR:
+ fio.blk_addr = blkno;
+ break;
+ default:
+ BUG();
+ }
+
+ page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
+ if (!page)
+ continue;
+ if (PageUptodate(page)) {
+ f2fs_put_page(page, 1);
+ continue;
+ }
+
+ f2fs_submit_page_mbio(sbi, page, &fio);
+ f2fs_put_page(page, 0);
+ }
+out:
+ f2fs_submit_merged_bio(sbi, META, READ);
+ return blkno - start;
+}
+
+void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct page *page;
+ bool readahead = false;
+
+ page = find_get_page(META_MAPPING(sbi), index);
+ if (!page || (page && !PageUptodate(page)))
+ readahead = true;
+ f2fs_put_page(page, 0);
+
+ if (readahead)
+ ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR);
+}
+
+static int f2fs_write_meta_page(struct page *page,
+ struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_P_SB(page);
+
+ trace_f2fs_writepage(page, META);
+
+ if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+ goto redirty_out;
+ if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
+ goto redirty_out;
+ if (unlikely(f2fs_cp_error(sbi)))
+ goto redirty_out;
+
+ f2fs_wait_on_page_writeback(page, META);
+ write_meta_page(sbi, page);
+ dec_page_count(sbi, F2FS_DIRTY_META);
+ unlock_page(page);
+
+ if (wbc->for_reclaim)
+ f2fs_submit_merged_bio(sbi, META, WRITE);
+ return 0;
+
+redirty_out:
+ redirty_page_for_writepage(wbc, page);
+ return AOP_WRITEPAGE_ACTIVATE;
+}
+
+static int f2fs_write_meta_pages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
+ long diff, written;
+
+ trace_f2fs_writepages(mapping->host, wbc, META);
+
+ /* collect a number of dirty meta pages and write together */
+ if (wbc->for_kupdate ||
+ get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
+ goto skip_write;
+
+ /* if mounting is failed, skip writing node pages */
+ mutex_lock(&sbi->cp_mutex);
+ diff = nr_pages_to_write(sbi, META, wbc);
+ written = sync_meta_pages(sbi, META, wbc->nr_to_write);
+ mutex_unlock(&sbi->cp_mutex);
+ wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
+ return 0;
+
+skip_write:
+ wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
+ return 0;
+}
+
+long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
+ long nr_to_write)
+{
+ struct address_space *mapping = META_MAPPING(sbi);
+ pgoff_t index = 0, end = LONG_MAX;
+ struct pagevec pvec;
+ long nwritten = 0;
+ struct writeback_control wbc = {
+ .for_reclaim = 0,
+ };
+
+ pagevec_init(&pvec, 0);
+
+ while (index <= end) {
+ int i, nr_pages;
+ nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_DIRTY,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
+ if (unlikely(nr_pages == 0))
+ break;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+
+ lock_page(page);
+
+ if (unlikely(page->mapping != mapping)) {
+continue_unlock:
+ unlock_page(page);
+ continue;
+ }
+ if (!PageDirty(page)) {
+ /* someone wrote it for us */
+ goto continue_unlock;
+ }
+
+ if (!clear_page_dirty_for_io(page))
+ goto continue_unlock;
+
+ if (mapping->a_ops->writepage(page, &wbc)) {
+ unlock_page(page);
+ break;
+ }
+ nwritten++;
+ if (unlikely(nwritten >= nr_to_write))
+ break;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+
+ if (nwritten)
+ f2fs_submit_merged_bio(sbi, type, WRITE);
+
+ return nwritten;
+}
+
+static int f2fs_set_meta_page_dirty(struct page *page)
+{
+ trace_f2fs_set_page_dirty(page, META);
+
+ SetPageUptodate(page);
+ if (!PageDirty(page)) {
+ __set_page_dirty_nobuffers(page);
+ inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
+ SetPagePrivate(page);
+ f2fs_trace_pid(page);
+ return 1;
+ }
+ return 0;
+}
+
+const struct address_space_operations f2fs_meta_aops = {
+ .writepage = f2fs_write_meta_page,
+ .writepages = f2fs_write_meta_pages,
+ .set_page_dirty = f2fs_set_meta_page_dirty,
+ .invalidatepage = f2fs_invalidate_page,
+ .releasepage = f2fs_release_page,
+};
+
+static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+ struct inode_management *im = &sbi->im[type];
+ struct ino_entry *e;
+retry:
+ if (radix_tree_preload(GFP_NOFS)) {
+ cond_resched();
+ goto retry;
+ }
+
+ spin_lock(&im->ino_lock);
+
+ e = radix_tree_lookup(&im->ino_root, ino);
+ if (!e) {
+ e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
+ if (!e) {
+ spin_unlock(&im->ino_lock);
+ radix_tree_preload_end();
+ goto retry;
+ }
+ if (radix_tree_insert(&im->ino_root, ino, e)) {
+ spin_unlock(&im->ino_lock);
+ kmem_cache_free(ino_entry_slab, e);
+ radix_tree_preload_end();
+ goto retry;
+ }
+ memset(e, 0, sizeof(struct ino_entry));
+ e->ino = ino;
+
+ list_add_tail(&e->list, &im->ino_list);
+ if (type != ORPHAN_INO)
+ im->ino_num++;
+ }
+ spin_unlock(&im->ino_lock);
+ radix_tree_preload_end();
+}
+
+static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+ struct inode_management *im = &sbi->im[type];
+ struct ino_entry *e;
+
+ spin_lock(&im->ino_lock);
+ e = radix_tree_lookup(&im->ino_root, ino);
+ if (e) {
+ list_del(&e->list);
+ radix_tree_delete(&im->ino_root, ino);
+ im->ino_num--;
+ spin_unlock(&im->ino_lock);
+ kmem_cache_free(ino_entry_slab, e);
+ return;
+ }
+ spin_unlock(&im->ino_lock);
+}
+
+void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+ /* add new dirty ino entry into list */
+ __add_ino_entry(sbi, ino, type);
+}
+
+void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+ /* remove dirty ino entry from list */
+ __remove_ino_entry(sbi, ino, type);
+}
+
+/* mode should be APPEND_INO or UPDATE_INO */
+bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
+{
+ struct inode_management *im = &sbi->im[mode];
+ struct ino_entry *e;
+
+ spin_lock(&im->ino_lock);
+ e = radix_tree_lookup(&im->ino_root, ino);
+ spin_unlock(&im->ino_lock);
+ return e ? true : false;
+}
+
+void release_dirty_inode(struct f2fs_sb_info *sbi)
+{
+ struct ino_entry *e, *tmp;
+ int i;
+
+ for (i = APPEND_INO; i <= UPDATE_INO; i++) {
+ struct inode_management *im = &sbi->im[i];
+
+ spin_lock(&im->ino_lock);
+ list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
+ list_del(&e->list);
+ radix_tree_delete(&im->ino_root, e->ino);
+ kmem_cache_free(ino_entry_slab, e);
+ im->ino_num--;
+ }
+ spin_unlock(&im->ino_lock);
+ }
+}
+
+int acquire_orphan_inode(struct f2fs_sb_info *sbi)
+{
+ struct inode_management *im = &sbi->im[ORPHAN_INO];
+ int err = 0;
+
+ spin_lock(&im->ino_lock);
+ if (unlikely(im->ino_num >= sbi->max_orphans))
+ err = -ENOSPC;
+ else
+ im->ino_num++;
+ spin_unlock(&im->ino_lock);
+
+ return err;
+}
+
+void release_orphan_inode(struct f2fs_sb_info *sbi)
+{
+ struct inode_management *im = &sbi->im[ORPHAN_INO];
+
+ spin_lock(&im->ino_lock);
+ f2fs_bug_on(sbi, im->ino_num == 0);
+ im->ino_num--;
+ spin_unlock(&im->ino_lock);
+}
+
+void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ /* add new orphan ino entry into list */
+ __add_ino_entry(sbi, ino, ORPHAN_INO);
+}
+
+void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ /* remove orphan entry from orphan list */
+ __remove_ino_entry(sbi, ino, ORPHAN_INO);
+}
+
+static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ struct inode *inode = f2fs_iget(sbi->sb, ino);
+ f2fs_bug_on(sbi, IS_ERR(inode));
+ clear_nlink(inode);
+
+ /* truncate all the data during iput */
+ iput(inode);
+}
+
+void recover_orphan_inodes(struct f2fs_sb_info *sbi)
+{
+ block_t start_blk, orphan_blocks, i, j;
+
+ if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
+ return;
+
+ set_sbi_flag(sbi, SBI_POR_DOING);
+
+ start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
+ orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
+
+ ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP);
+
+ for (i = 0; i < orphan_blocks; i++) {
+ struct page *page = get_meta_page(sbi, start_blk + i);
+ struct f2fs_orphan_block *orphan_blk;
+
+ orphan_blk = (struct f2fs_orphan_block *)page_address(page);
+ for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
+ nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
+ recover_orphan_inode(sbi, ino);
+ }
+ f2fs_put_page(page, 1);
+ }
+ /* clear Orphan Flag */
+ clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
+ clear_sbi_flag(sbi, SBI_POR_DOING);
+ return;
+}
+
+static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
+{
+ struct list_head *head;
+ struct f2fs_orphan_block *orphan_blk = NULL;
+ unsigned int nentries = 0;
+ unsigned short index;
+ unsigned short orphan_blocks;
+ struct page *page = NULL;
+ struct ino_entry *orphan = NULL;
+ struct inode_management *im = &sbi->im[ORPHAN_INO];
+
+ orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
+
+ for (index = 0; index < orphan_blocks; index++)
+ grab_meta_page(sbi, start_blk + index);
+
+ index = 1;
+ spin_lock(&im->ino_lock);
+ head = &im->ino_list;
+
+ /* loop for each orphan inode entry and write them in Jornal block */
+ list_for_each_entry(orphan, head, list) {
+ if (!page) {
+ page = find_get_page(META_MAPPING(sbi), start_blk++);
+ f2fs_bug_on(sbi, !page);
+ orphan_blk =
+ (struct f2fs_orphan_block *)page_address(page);
+ memset(orphan_blk, 0, sizeof(*orphan_blk));
+ f2fs_put_page(page, 0);
+ }
+
+ orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
+
+ if (nentries == F2FS_ORPHANS_PER_BLOCK) {
+ /*
+ * an orphan block is full of 1020 entries,
+ * then we need to flush current orphan blocks
+ * and bring another one in memory
+ */
+ orphan_blk->blk_addr = cpu_to_le16(index);
+ orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
+ orphan_blk->entry_count = cpu_to_le32(nentries);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+ index++;
+ nentries = 0;
+ page = NULL;
+ }
+ }
+
+ if (page) {
+ orphan_blk->blk_addr = cpu_to_le16(index);
+ orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
+ orphan_blk->entry_count = cpu_to_le32(nentries);
+ set_page_dirty(page);
+ f2fs_put_page(page, 1);
+ }
+
+ spin_unlock(&im->ino_lock);
+}
+
+static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
+ block_t cp_addr, unsigned long long *version)
+{
+ struct page *cp_page_1, *cp_page_2 = NULL;
+ unsigned long blk_size = sbi->blocksize;
+ struct f2fs_checkpoint *cp_block;
+ unsigned long long cur_version = 0, pre_version = 0;
+ size_t crc_offset;
+ __u32 crc = 0;
+
+ /* Read the 1st cp block in this CP pack */
+ cp_page_1 = get_meta_page(sbi, cp_addr);
+
+ /* get the version number */
+ cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
+ crc_offset = le32_to_cpu(cp_block->checksum_offset);
+ if (crc_offset >= blk_size)
+ goto invalid_cp1;
+
+ crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
+ if (!f2fs_crc_valid(crc, cp_block, crc_offset))
+ goto invalid_cp1;
+
+ pre_version = cur_cp_version(cp_block);
+
+ /* Read the 2nd cp block in this CP pack */
+ cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
+ cp_page_2 = get_meta_page(sbi, cp_addr);
+
+ cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
+ crc_offset = le32_to_cpu(cp_block->checksum_offset);
+ if (crc_offset >= blk_size)
+ goto invalid_cp2;
+
+ crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
+ if (!f2fs_crc_valid(crc, cp_block, crc_offset))
+ goto invalid_cp2;
+
+ cur_version = cur_cp_version(cp_block);
+
+ if (cur_version == pre_version) {
+ *version = cur_version;
+ f2fs_put_page(cp_page_2, 1);
+ return cp_page_1;
+ }
+invalid_cp2:
+ f2fs_put_page(cp_page_2, 1);
+invalid_cp1:
+ f2fs_put_page(cp_page_1, 1);
+ return NULL;
+}
+
+int get_valid_checkpoint(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_checkpoint *cp_block;
+ struct f2fs_super_block *fsb = sbi->raw_super;
+ struct page *cp1, *cp2, *cur_page;
+ unsigned long blk_size = sbi->blocksize;
+ unsigned long long cp1_version = 0, cp2_version = 0;
+ unsigned long long cp_start_blk_no;
+ unsigned int cp_blks = 1 + __cp_payload(sbi);
+ block_t cp_blk_no;
+ int i;
+
+ sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
+ if (!sbi->ckpt)
+ return -ENOMEM;
+ /*
+ * Finding out valid cp block involves read both
+ * sets( cp pack1 and cp pack 2)
+ */
+ cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
+ cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
+
+ /* The second checkpoint pack should start at the next segment */
+ cp_start_blk_no += ((unsigned long long)1) <<
+ le32_to_cpu(fsb->log_blocks_per_seg);
+ cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
+
+ if (cp1 && cp2) {
+ if (ver_after(cp2_version, cp1_version))
+ cur_page = cp2;
+ else
+ cur_page = cp1;
+ } else if (cp1) {
+ cur_page = cp1;
+ } else if (cp2) {
+ cur_page = cp2;
+ } else {
+ goto fail_no_cp;
+ }
+
+ cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
+ memcpy(sbi->ckpt, cp_block, blk_size);
+
+ if (cp_blks <= 1)
+ goto done;
+
+ cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
+ if (cur_page == cp2)
+ cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
+
+ for (i = 1; i < cp_blks; i++) {
+ void *sit_bitmap_ptr;
+ unsigned char *ckpt = (unsigned char *)sbi->ckpt;
+
+ cur_page = get_meta_page(sbi, cp_blk_no + i);
+ sit_bitmap_ptr = page_address(cur_page);
+ memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
+ f2fs_put_page(cur_page, 1);
+ }
+done:
+ f2fs_put_page(cp1, 1);
+ f2fs_put_page(cp2, 1);
+ return 0;
+
+fail_no_cp:
+ kfree(sbi->ckpt);
+ return -EINVAL;
+}
+
+static int __add_dirty_inode(struct inode *inode, struct inode_entry *new)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
+ return -EEXIST;
+
+ set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
+ F2FS_I(inode)->dirty_dir = new;
+ list_add_tail(&new->list, &sbi->dir_inode_list);
+ stat_inc_dirty_dir(sbi);
+ return 0;
+}
+
+void update_dirty_page(struct inode *inode, struct page *page)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct inode_entry *new;
+ int ret = 0;
+
+ if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
+ return;
+
+ if (!S_ISDIR(inode->i_mode)) {
+ inode_inc_dirty_pages(inode);
+ goto out;
+ }
+
+ new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
+ new->inode = inode;
+ INIT_LIST_HEAD(&new->list);
+
+ spin_lock(&sbi->dir_inode_lock);
+ ret = __add_dirty_inode(inode, new);
+ inode_inc_dirty_pages(inode);
+ spin_unlock(&sbi->dir_inode_lock);
+
+ if (ret)
+ kmem_cache_free(inode_entry_slab, new);
+out:
+ SetPagePrivate(page);
+ f2fs_trace_pid(page);
+}
+
+void add_dirty_dir_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct inode_entry *new =
+ f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
+ int ret = 0;
+
+ new->inode = inode;
+ INIT_LIST_HEAD(&new->list);
+
+ spin_lock(&sbi->dir_inode_lock);
+ ret = __add_dirty_inode(inode, new);
+ spin_unlock(&sbi->dir_inode_lock);
+
+ if (ret)
+ kmem_cache_free(inode_entry_slab, new);
+}
+
+void remove_dirty_dir_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct inode_entry *entry;
+
+ if (!S_ISDIR(inode->i_mode))
+ return;
+
+ spin_lock(&sbi->dir_inode_lock);
+ if (get_dirty_pages(inode) ||
+ !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) {
+ spin_unlock(&sbi->dir_inode_lock);
+ return;
+ }
+
+ entry = F2FS_I(inode)->dirty_dir;
+ list_del(&entry->list);
+ F2FS_I(inode)->dirty_dir = NULL;
+ clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
+ stat_dec_dirty_dir(sbi);
+ spin_unlock(&sbi->dir_inode_lock);
+ kmem_cache_free(inode_entry_slab, entry);
+
+ /* Only from the recovery routine */
+ if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
+ clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
+ iput(inode);
+ }
+}
+
+void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
+{
+ struct list_head *head;
+ struct inode_entry *entry;
+ struct inode *inode;
+retry:
+ if (unlikely(f2fs_cp_error(sbi)))
+ return;
+
+ spin_lock(&sbi->dir_inode_lock);
+
+ head = &sbi->dir_inode_list;
+ if (list_empty(head)) {
+ spin_unlock(&sbi->dir_inode_lock);
+ return;
+ }
+ entry = list_entry(head->next, struct inode_entry, list);
+ inode = igrab(entry->inode);
+ spin_unlock(&sbi->dir_inode_lock);
+ if (inode) {
+ filemap_fdatawrite(inode->i_mapping);
+ iput(inode);
+ } else {
+ /*
+ * We should submit bio, since it exists several
+ * wribacking dentry pages in the freeing inode.
+ */
+ f2fs_submit_merged_bio(sbi, DATA, WRITE);
+ cond_resched();
+ }
+ goto retry;
+}
+
+/*
+ * Freeze all the FS-operations for checkpoint.
+ */
+static int block_operations(struct f2fs_sb_info *sbi)
+{
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = LONG_MAX,
+ .for_reclaim = 0,
+ };
+ struct blk_plug plug;
+ int err = 0;
+
+ blk_start_plug(&plug);
+
+retry_flush_dents:
+ f2fs_lock_all(sbi);
+ /* write all the dirty dentry pages */
+ if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
+ f2fs_unlock_all(sbi);
+ sync_dirty_dir_inodes(sbi);
+ if (unlikely(f2fs_cp_error(sbi))) {
+ err = -EIO;
+ goto out;
+ }
+ goto retry_flush_dents;
+ }
+
+ /*
+ * POR: we should ensure that there are no dirty node pages
+ * until finishing nat/sit flush.
+ */
+retry_flush_nodes:
+ down_write(&sbi->node_write);
+
+ if (get_pages(sbi, F2FS_DIRTY_NODES)) {
+ up_write(&sbi->node_write);
+ sync_node_pages(sbi, 0, &wbc);
+ if (unlikely(f2fs_cp_error(sbi))) {
+ f2fs_unlock_all(sbi);
+ err = -EIO;
+ goto out;
+ }
+ goto retry_flush_nodes;
+ }
+out:
+ blk_finish_plug(&plug);
+ return err;
+}
+
+static void unblock_operations(struct f2fs_sb_info *sbi)
+{
+ up_write(&sbi->node_write);
+ f2fs_unlock_all(sbi);
+}
+
+static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
+{
+ DEFINE_WAIT(wait);
+
+ for (;;) {
+ prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
+
+ if (!get_pages(sbi, F2FS_WRITEBACK))
+ break;
+
+ io_schedule();
+ }
+ finish_wait(&sbi->cp_wait, &wait);
+}
+
+static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
+ nid_t last_nid = nm_i->next_scan_nid;
+ block_t start_blk;
+ struct page *cp_page;
+ unsigned int data_sum_blocks, orphan_blocks;
+ __u32 crc32 = 0;
+ void *kaddr;
+ int i;
+ int cp_payload_blks = __cp_payload(sbi);
+
+ /*
+ * This avoids to conduct wrong roll-forward operations and uses
+ * metapages, so should be called prior to sync_meta_pages below.
+ */
+ discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg));
+
+ /* Flush all the NAT/SIT pages */
+ while (get_pages(sbi, F2FS_DIRTY_META)) {
+ sync_meta_pages(sbi, META, LONG_MAX);
+ if (unlikely(f2fs_cp_error(sbi)))
+ return;
+ }
+
+ next_free_nid(sbi, &last_nid);
+
+ /*
+ * modify checkpoint
+ * version number is already updated
+ */
+ ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
+ ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
+ ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
+ for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
+ ckpt->cur_node_segno[i] =
+ cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
+ ckpt->cur_node_blkoff[i] =
+ cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
+ ckpt->alloc_type[i + CURSEG_HOT_NODE] =
+ curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
+ }
+ for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
+ ckpt->cur_data_segno[i] =
+ cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
+ ckpt->cur_data_blkoff[i] =
+ cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
+ ckpt->alloc_type[i + CURSEG_HOT_DATA] =
+ curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
+ }
+
+ ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
+ ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
+ ckpt->next_free_nid = cpu_to_le32(last_nid);
+
+ /* 2 cp + n data seg summary + orphan inode blocks */
+ data_sum_blocks = npages_for_summary_flush(sbi, false);
+ if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
+ set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
+ else
+ clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
+
+ orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
+ ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
+ orphan_blocks);
+
+ if (__remain_node_summaries(cpc->reason))
+ ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
+ cp_payload_blks + data_sum_blocks +
+ orphan_blocks + NR_CURSEG_NODE_TYPE);
+ else
+ ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
+ cp_payload_blks + data_sum_blocks +
+ orphan_blocks);
+
+ if (cpc->reason == CP_UMOUNT)
+ set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
+ else
+ clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
+
+ if (cpc->reason == CP_FASTBOOT)
+ set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
+ else
+ clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
+
+ if (orphan_num)
+ set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
+ else
+ clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
+
+ if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+ set_ckpt_flags(ckpt, CP_FSCK_FLAG);
+
+ /* update SIT/NAT bitmap */
+ get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
+ get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
+
+ crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
+ *((__le32 *)((unsigned char *)ckpt +
+ le32_to_cpu(ckpt->checksum_offset)))
+ = cpu_to_le32(crc32);
+
+ start_blk = __start_cp_addr(sbi);
+
+ /* write out checkpoint buffer at block 0 */
+ cp_page = grab_meta_page(sbi, start_blk++);
+ kaddr = page_address(cp_page);
+ memcpy(kaddr, ckpt, F2FS_BLKSIZE);
+ set_page_dirty(cp_page);
+ f2fs_put_page(cp_page, 1);
+
+ for (i = 1; i < 1 + cp_payload_blks; i++) {
+ cp_page = grab_meta_page(sbi, start_blk++);
+ kaddr = page_address(cp_page);
+ memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE, F2FS_BLKSIZE);
+ set_page_dirty(cp_page);
+ f2fs_put_page(cp_page, 1);
+ }
+
+ if (orphan_num) {
+ write_orphan_inodes(sbi, start_blk);
+ start_blk += orphan_blocks;
+ }
+
+ write_data_summaries(sbi, start_blk);
+ start_blk += data_sum_blocks;
+ if (__remain_node_summaries(cpc->reason)) {
+ write_node_summaries(sbi, start_blk);
+ start_blk += NR_CURSEG_NODE_TYPE;
+ }
+
+ /* writeout checkpoint block */
+ cp_page = grab_meta_page(sbi, start_blk);
+ kaddr = page_address(cp_page);
+ memcpy(kaddr, ckpt, F2FS_BLKSIZE);
+ set_page_dirty(cp_page);
+ f2fs_put_page(cp_page, 1);
+
+ /* wait for previous submitted node/meta pages writeback */
+ wait_on_all_pages_writeback(sbi);
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ return;
+
+ filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
+ filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
+
+ /* update user_block_counts */
+ sbi->last_valid_block_count = sbi->total_valid_block_count;
+ sbi->alloc_valid_block_count = 0;
+
+ /* Here, we only have one bio having CP pack */
+ sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
+
+ /* wait for previous submitted meta pages writeback */
+ wait_on_all_pages_writeback(sbi);
+
+ release_dirty_inode(sbi);
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ return;
+
+ clear_prefree_segments(sbi);
+ clear_sbi_flag(sbi, SBI_IS_DIRTY);
+}
+
+/*
+ * We guarantee that this checkpoint procedure will not fail.
+ */
+void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ unsigned long long ckpt_ver;
+
+ mutex_lock(&sbi->cp_mutex);
+
+ if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
+ (cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC))
+ goto out;
+ if (unlikely(f2fs_cp_error(sbi)))
+ goto out;
+ if (f2fs_readonly(sbi->sb))
+ goto out;
+
+ trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
+
+ if (block_operations(sbi))
+ goto out;
+
+ trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
+
+ f2fs_submit_merged_bio(sbi, DATA, WRITE);
+ f2fs_submit_merged_bio(sbi, NODE, WRITE);
+ f2fs_submit_merged_bio(sbi, META, WRITE);
+
+ /*
+ * update checkpoint pack index
+ * Increase the version number so that
+ * SIT entries and seg summaries are written at correct place
+ */
+ ckpt_ver = cur_cp_version(ckpt);
+ ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
+
+ /* write cached NAT/SIT entries to NAT/SIT area */
+ flush_nat_entries(sbi);
+ flush_sit_entries(sbi, cpc);
+
+ /* unlock all the fs_lock[] in do_checkpoint() */
+ do_checkpoint(sbi, cpc);
+
+ unblock_operations(sbi);
+ stat_inc_cp_count(sbi->stat_info);
+
+ if (cpc->reason == CP_RECOVERY)
+ f2fs_msg(sbi->sb, KERN_NOTICE,
+ "checkpoint: version = %llx", ckpt_ver);
+out:
+ mutex_unlock(&sbi->cp_mutex);
+ trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
+}
+
+void init_ino_entry_info(struct f2fs_sb_info *sbi)
+{
+ int i;
+
+ for (i = 0; i < MAX_INO_ENTRY; i++) {
+ struct inode_management *im = &sbi->im[i];
+
+ INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
+ spin_lock_init(&im->ino_lock);
+ INIT_LIST_HEAD(&im->ino_list);
+ im->ino_num = 0;
+ }
+
+ sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
+ NR_CURSEG_TYPE - __cp_payload(sbi)) *
+ F2FS_ORPHANS_PER_BLOCK;
+}
+
+int __init create_checkpoint_caches(void)
+{
+ ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
+ sizeof(struct ino_entry));
+ if (!ino_entry_slab)
+ return -ENOMEM;
+ inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
+ sizeof(struct inode_entry));
+ if (!inode_entry_slab) {
+ kmem_cache_destroy(ino_entry_slab);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void destroy_checkpoint_caches(void)
+{
+ kmem_cache_destroy(ino_entry_slab);
+ kmem_cache_destroy(inode_entry_slab);
+}
Code Review / kvmfornfv.git / blobdiff