v4.19.13 snapshot.
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
new file mode 100644
index 0000000..59d0472
--- /dev/null
+++ b/fs/f2fs/checkpoint.c
@@ -0,0 +1,1564 @@
+/*
+ * 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 *f2fs_inode_entry_slab;
+
+void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io)
+{
+ f2fs_build_fault_attr(sbi, 0, 0);
+ set_ckpt_flags(sbi, CP_ERROR_FLAG);
+ if (!end_io)
+ f2fs_flush_merged_writes(sbi);
+}
+
+/*
+ * We guarantee no failure on the returned page.
+ */
+struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct address_space *mapping = META_MAPPING(sbi);
+ struct page *page = NULL;
+repeat:
+ page = f2fs_grab_cache_page(mapping, index, false);
+ if (!page) {
+ cond_resched();
+ goto repeat;
+ }
+ f2fs_wait_on_page_writeback(page, META, true);
+ if (!PageUptodate(page))
+ SetPageUptodate(page);
+ return page;
+}
+
+/*
+ * We guarantee no failure on the returned page.
+ */
+static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
+ bool is_meta)
+{
+ struct address_space *mapping = META_MAPPING(sbi);
+ struct page *page;
+ struct f2fs_io_info fio = {
+ .sbi = sbi,
+ .type = META,
+ .op = REQ_OP_READ,
+ .op_flags = REQ_META | REQ_PRIO,
+ .old_blkaddr = index,
+ .new_blkaddr = index,
+ .encrypted_page = NULL,
+ .is_meta = is_meta,
+ };
+ int err;
+
+ if (unlikely(!is_meta))
+ fio.op_flags &= ~REQ_META;
+repeat:
+ page = f2fs_grab_cache_page(mapping, index, false);
+ if (!page) {
+ cond_resched();
+ goto repeat;
+ }
+ if (PageUptodate(page))
+ goto out;
+
+ fio.page = page;
+
+ err = f2fs_submit_page_bio(&fio);
+ if (err) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(err);
+ }
+
+ lock_page(page);
+ if (unlikely(page->mapping != mapping)) {
+ f2fs_put_page(page, 1);
+ goto repeat;
+ }
+
+ if (unlikely(!PageUptodate(page))) {
+ f2fs_put_page(page, 1);
+ return ERR_PTR(-EIO);
+ }
+out:
+ return page;
+}
+
+struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ return __get_meta_page(sbi, index, true);
+}
+
+struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ struct page *page;
+ int count = 0;
+
+retry:
+ page = __get_meta_page(sbi, index, true);
+ if (IS_ERR(page)) {
+ if (PTR_ERR(page) == -EIO &&
+ ++count <= DEFAULT_RETRY_IO_COUNT)
+ goto retry;
+
+ f2fs_stop_checkpoint(sbi, false);
+ f2fs_bug_on(sbi, 1);
+ }
+
+ return page;
+}
+
+/* for POR only */
+struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
+{
+ return __get_meta_page(sbi, index, false);
+}
+
+bool f2fs_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:
+ case DATA_GENERIC:
+ if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
+ blkaddr < MAIN_BLKADDR(sbi))) {
+ if (type == DATA_GENERIC) {
+ f2fs_msg(sbi->sb, KERN_WARNING,
+ "access invalid blkaddr:%u", blkaddr);
+ WARN_ON(1);
+ }
+ return false;
+ }
+ break;
+ case META_GENERIC:
+ if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
+ blkaddr >= MAIN_BLKADDR(sbi)))
+ return false;
+ break;
+ default:
+ BUG();
+ }
+
+ return true;
+}
+
+/*
+ * Readahead CP/NAT/SIT/SSA pages
+ */
+int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
+ int type, bool sync)
+{
+ struct page *page;
+ block_t blkno = start;
+ struct f2fs_io_info fio = {
+ .sbi = sbi,
+ .type = META,
+ .op = REQ_OP_READ,
+ .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
+ .encrypted_page = NULL,
+ .in_list = false,
+ .is_meta = (type != META_POR),
+ };
+ struct blk_plug plug;
+
+ if (unlikely(type == META_POR))
+ fio.op_flags &= ~REQ_META;
+
+ blk_start_plug(&plug);
+ for (; nrpages-- > 0; blkno++) {
+
+ if (!f2fs_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.new_blkaddr = current_nat_addr(sbi,
+ blkno * NAT_ENTRY_PER_BLOCK);
+ break;
+ case META_SIT:
+ /* get sit block addr */
+ fio.new_blkaddr = current_sit_addr(sbi,
+ blkno * SIT_ENTRY_PER_BLOCK);
+ break;
+ case META_SSA:
+ case META_CP:
+ case META_POR:
+ fio.new_blkaddr = blkno;
+ break;
+ default:
+ BUG();
+ }
+
+ page = f2fs_grab_cache_page(META_MAPPING(sbi),
+ fio.new_blkaddr, false);
+ if (!page)
+ continue;
+ if (PageUptodate(page)) {
+ f2fs_put_page(page, 1);
+ continue;
+ }
+
+ fio.page = page;
+ f2fs_submit_page_bio(&fio);
+ f2fs_put_page(page, 0);
+ }
+out:
+ blk_finish_plug(&plug);
+ return blkno - start;
+}
+
+void f2fs_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 || !PageUptodate(page))
+ readahead = true;
+ f2fs_put_page(page, 0);
+
+ if (readahead)
+ f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
+}
+
+static int __f2fs_write_meta_page(struct page *page,
+ struct writeback_control *wbc,
+ enum iostat_type io_type)
+{
+ struct f2fs_sb_info *sbi = F2FS_P_SB(page);
+
+ trace_f2fs_writepage(page, META);
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ goto redirty_out;
+ 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;
+
+ f2fs_do_write_meta_page(sbi, page, io_type);
+ dec_page_count(sbi, F2FS_DIRTY_META);
+
+ if (wbc->for_reclaim)
+ f2fs_submit_merged_write_cond(sbi, page->mapping->host,
+ 0, page->index, META);
+
+ unlock_page(page);
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ f2fs_submit_merged_write(sbi, META);
+
+ return 0;
+
+redirty_out:
+ redirty_page_for_writepage(wbc, page);
+ return AOP_WRITEPAGE_ACTIVATE;
+}
+
+static int f2fs_write_meta_page(struct page *page,
+ struct writeback_control *wbc)
+{
+ return __f2fs_write_meta_page(page, wbc, FS_META_IO);
+}
+
+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;
+
+ if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+ goto skip_write;
+
+ /* 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 locked failed, cp will flush dirty pages instead */
+ if (!mutex_trylock(&sbi->cp_mutex))
+ goto skip_write;
+
+ trace_f2fs_writepages(mapping->host, wbc, META);
+ diff = nr_pages_to_write(sbi, META, wbc);
+ written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
+ 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);
+ trace_f2fs_writepages(mapping->host, wbc, META);
+ return 0;
+}
+
+long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
+ long nr_to_write, enum iostat_type io_type)
+{
+ struct address_space *mapping = META_MAPPING(sbi);
+ pgoff_t index = 0, prev = ULONG_MAX;
+ struct pagevec pvec;
+ long nwritten = 0;
+ int nr_pages;
+ struct writeback_control wbc = {
+ .for_reclaim = 0,
+ };
+ struct blk_plug plug;
+
+ pagevec_init(&pvec);
+
+ blk_start_plug(&plug);
+
+ while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_DIRTY))) {
+ int i;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+
+ if (prev == ULONG_MAX)
+ prev = page->index - 1;
+ if (nr_to_write != LONG_MAX && page->index != prev + 1) {
+ pagevec_release(&pvec);
+ goto stop;
+ }
+
+ 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;
+ }
+
+ f2fs_wait_on_page_writeback(page, META, true);
+
+ BUG_ON(PageWriteback(page));
+ if (!clear_page_dirty_for_io(page))
+ goto continue_unlock;
+
+ if (__f2fs_write_meta_page(page, &wbc, io_type)) {
+ unlock_page(page);
+ break;
+ }
+ nwritten++;
+ prev = page->index;
+ if (unlikely(nwritten >= nr_to_write))
+ break;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+stop:
+ if (nwritten)
+ f2fs_submit_merged_write(sbi, type);
+
+ blk_finish_plug(&plug);
+
+ return nwritten;
+}
+
+static int f2fs_set_meta_page_dirty(struct page *page)
+{
+ trace_f2fs_set_page_dirty(page, META);
+
+ if (!PageUptodate(page))
+ 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,
+#ifdef CONFIG_MIGRATION
+ .migratepage = f2fs_migrate_page,
+#endif
+};
+
+static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
+ unsigned int devidx, int type)
+{
+ struct inode_management *im = &sbi->im[type];
+ struct ino_entry *e, *tmp;
+
+ tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
+
+ radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
+
+ spin_lock(&im->ino_lock);
+ e = radix_tree_lookup(&im->ino_root, ino);
+ if (!e) {
+ e = tmp;
+ if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
+ f2fs_bug_on(sbi, 1);
+
+ 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++;
+ }
+
+ if (type == FLUSH_INO)
+ f2fs_set_bit(devidx, (char *)&e->dirty_device);
+
+ spin_unlock(&im->ino_lock);
+ radix_tree_preload_end();
+
+ if (e != tmp)
+ kmem_cache_free(ino_entry_slab, tmp);
+}
+
+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 f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
+{
+ /* add new dirty ino entry into list */
+ __add_ino_entry(sbi, ino, 0, type);
+}
+
+void f2fs_remove_ino_entry(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 f2fs_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 f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
+{
+ struct ino_entry *e, *tmp;
+ int i;
+
+ for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; 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);
+ }
+}
+
+void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
+ unsigned int devidx, int type)
+{
+ __add_ino_entry(sbi, ino, devidx, type);
+}
+
+bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
+ unsigned int devidx, int type)
+{
+ struct inode_management *im = &sbi->im[type];
+ struct ino_entry *e;
+ bool is_dirty = false;
+
+ spin_lock(&im->ino_lock);
+ e = radix_tree_lookup(&im->ino_root, ino);
+ if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
+ is_dirty = true;
+ spin_unlock(&im->ino_lock);
+ return is_dirty;
+}
+
+int f2fs_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 (time_to_inject(sbi, FAULT_ORPHAN)) {
+ spin_unlock(&im->ino_lock);
+ f2fs_show_injection_info(FAULT_ORPHAN);
+ return -ENOSPC;
+ }
+
+ if (unlikely(im->ino_num >= sbi->max_orphans))
+ err = -ENOSPC;
+ else
+ im->ino_num++;
+ spin_unlock(&im->ino_lock);
+
+ return err;
+}
+
+void f2fs_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 f2fs_add_orphan_inode(struct inode *inode)
+{
+ /* add new orphan ino entry into list */
+ __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
+ f2fs_update_inode_page(inode);
+}
+
+void f2fs_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 int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
+{
+ struct inode *inode;
+ struct node_info ni;
+ int err;
+
+ inode = f2fs_iget_retry(sbi->sb, ino);
+ if (IS_ERR(inode)) {
+ /*
+ * there should be a bug that we can't find the entry
+ * to orphan inode.
+ */
+ f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
+ return PTR_ERR(inode);
+ }
+
+ err = dquot_initialize(inode);
+ if (err) {
+ iput(inode);
+ goto err_out;
+ }
+
+ clear_nlink(inode);
+
+ /* truncate all the data during iput */
+ iput(inode);
+
+ err = f2fs_get_node_info(sbi, ino, &ni);
+ if (err)
+ goto err_out;
+
+ /* ENOMEM was fully retried in f2fs_evict_inode. */
+ if (ni.blk_addr != NULL_ADDR) {
+ err = -EIO;
+ goto err_out;
+ }
+ return 0;
+
+err_out:
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ f2fs_msg(sbi->sb, KERN_WARNING,
+ "%s: orphan failed (ino=%x), run fsck to fix.",
+ __func__, ino);
+ return err;
+}
+
+int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
+{
+ block_t start_blk, orphan_blocks, i, j;
+ unsigned int s_flags = sbi->sb->s_flags;
+ int err = 0;
+#ifdef CONFIG_QUOTA
+ int quota_enabled;
+#endif
+
+ if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
+ return 0;
+
+ if (s_flags & SB_RDONLY) {
+ f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs");
+ sbi->sb->s_flags &= ~SB_RDONLY;
+ }
+
+#ifdef CONFIG_QUOTA
+ /* Needed for iput() to work correctly and not trash data */
+ sbi->sb->s_flags |= SB_ACTIVE;
+
+ /*
+ * Turn on quotas which were not enabled for read-only mounts if
+ * filesystem has quota feature, so that they are updated correctly.
+ */
+ quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
+#endif
+
+ start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
+ orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
+
+ f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
+
+ for (i = 0; i < orphan_blocks; i++) {
+ struct page *page;
+ struct f2fs_orphan_block *orphan_blk;
+
+ page = f2fs_get_meta_page(sbi, start_blk + i);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto out;
+ }
+
+ 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]);
+ err = recover_orphan_inode(sbi, ino);
+ if (err) {
+ f2fs_put_page(page, 1);
+ goto out;
+ }
+ }
+ f2fs_put_page(page, 1);
+ }
+ /* clear Orphan Flag */
+ clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
+out:
+ set_sbi_flag(sbi, SBI_IS_RECOVERED);
+
+#ifdef CONFIG_QUOTA
+ /* Turn quotas off */
+ if (quota_enabled)
+ f2fs_quota_off_umount(sbi->sb);
+#endif
+ sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
+
+ return err;
+}
+
+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 = 1;
+ 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);
+
+ /*
+ * we don't need to do spin_lock(&im->ino_lock) here, since all the
+ * orphan inode operations are covered under f2fs_lock_op().
+ * And, spin_lock should be avoided due to page operations below.
+ */
+ 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 = f2fs_grab_meta_page(sbi, start_blk++);
+ orphan_blk =
+ (struct f2fs_orphan_block *)page_address(page);
+ memset(orphan_blk, 0, sizeof(*orphan_blk));
+ }
+
+ 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);
+ }
+}
+
+static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
+ struct f2fs_checkpoint **cp_block, struct page **cp_page,
+ unsigned long long *version)
+{
+ unsigned long blk_size = sbi->blocksize;
+ size_t crc_offset = 0;
+ __u32 crc = 0;
+
+ *cp_page = f2fs_get_meta_page(sbi, cp_addr);
+ if (IS_ERR(*cp_page))
+ return PTR_ERR(*cp_page);
+
+ *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
+
+ crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
+ if (crc_offset > (blk_size - sizeof(__le32))) {
+ f2fs_put_page(*cp_page, 1);
+ f2fs_msg(sbi->sb, KERN_WARNING,
+ "invalid crc_offset: %zu", crc_offset);
+ return -EINVAL;
+ }
+
+ crc = cur_cp_crc(*cp_block);
+ if (!f2fs_crc_valid(sbi, crc, *cp_block, crc_offset)) {
+ f2fs_put_page(*cp_page, 1);
+ f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value");
+ return -EINVAL;
+ }
+
+ *version = cur_cp_version(*cp_block);
+ return 0;
+}
+
+static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
+ block_t cp_addr, unsigned long long *version)
+{
+ struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
+ struct f2fs_checkpoint *cp_block = NULL;
+ unsigned long long cur_version = 0, pre_version = 0;
+ int err;
+
+ err = get_checkpoint_version(sbi, cp_addr, &cp_block,
+ &cp_page_1, version);
+ if (err)
+ return NULL;
+
+ if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
+ sbi->blocks_per_seg) {
+ f2fs_msg(sbi->sb, KERN_WARNING,
+ "invalid cp_pack_total_block_count:%u",
+ le32_to_cpu(cp_block->cp_pack_total_block_count));
+ goto invalid_cp;
+ }
+ pre_version = *version;
+
+ cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
+ err = get_checkpoint_version(sbi, cp_addr, &cp_block,
+ &cp_page_2, version);
+ if (err)
+ goto invalid_cp;
+ cur_version = *version;
+
+ if (cur_version == pre_version) {
+ *version = cur_version;
+ f2fs_put_page(cp_page_2, 1);
+ return cp_page_1;
+ }
+ f2fs_put_page(cp_page_2, 1);
+invalid_cp:
+ f2fs_put_page(cp_page_1, 1);
+ return NULL;
+}
+
+int f2fs_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 = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
+ 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 (cur_page == cp1)
+ sbi->cur_cp_pack = 1;
+ else
+ sbi->cur_cp_pack = 2;
+
+ /* Sanity checking of checkpoint */
+ if (f2fs_sanity_check_ckpt(sbi))
+ goto free_fail_no_cp;
+
+ 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 = f2fs_get_meta_page(sbi, cp_blk_no + i);
+ if (IS_ERR(cur_page))
+ goto free_fail_no_cp;
+ 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;
+
+free_fail_no_cp:
+ f2fs_put_page(cp1, 1);
+ f2fs_put_page(cp2, 1);
+fail_no_cp:
+ kfree(sbi->ckpt);
+ return -EINVAL;
+}
+
+static void __add_dirty_inode(struct inode *inode, enum inode_type type)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
+
+ if (is_inode_flag_set(inode, flag))
+ return;
+
+ set_inode_flag(inode, flag);
+ if (!f2fs_is_volatile_file(inode))
+ list_add_tail(&F2FS_I(inode)->dirty_list,
+ &sbi->inode_list[type]);
+ stat_inc_dirty_inode(sbi, type);
+}
+
+static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
+{
+ int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
+
+ if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
+ return;
+
+ list_del_init(&F2FS_I(inode)->dirty_list);
+ clear_inode_flag(inode, flag);
+ stat_dec_dirty_inode(F2FS_I_SB(inode), type);
+}
+
+void f2fs_update_dirty_page(struct inode *inode, struct page *page)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
+
+ if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
+ !S_ISLNK(inode->i_mode))
+ return;
+
+ spin_lock(&sbi->inode_lock[type]);
+ if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
+ __add_dirty_inode(inode, type);
+ inode_inc_dirty_pages(inode);
+ spin_unlock(&sbi->inode_lock[type]);
+
+ SetPagePrivate(page);
+ f2fs_trace_pid(page);
+}
+
+void f2fs_remove_dirty_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
+
+ if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
+ !S_ISLNK(inode->i_mode))
+ return;
+
+ if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
+ return;
+
+ spin_lock(&sbi->inode_lock[type]);
+ __remove_dirty_inode(inode, type);
+ spin_unlock(&sbi->inode_lock[type]);
+}
+
+int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
+{
+ struct list_head *head;
+ struct inode *inode;
+ struct f2fs_inode_info *fi;
+ bool is_dir = (type == DIR_INODE);
+ unsigned long ino = 0;
+
+ trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
+ get_pages(sbi, is_dir ?
+ F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
+retry:
+ if (unlikely(f2fs_cp_error(sbi)))
+ return -EIO;
+
+ spin_lock(&sbi->inode_lock[type]);
+
+ head = &sbi->inode_list[type];
+ if (list_empty(head)) {
+ spin_unlock(&sbi->inode_lock[type]);
+ trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
+ get_pages(sbi, is_dir ?
+ F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
+ return 0;
+ }
+ fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
+ inode = igrab(&fi->vfs_inode);
+ spin_unlock(&sbi->inode_lock[type]);
+ if (inode) {
+ unsigned long cur_ino = inode->i_ino;
+
+ if (is_dir)
+ F2FS_I(inode)->cp_task = current;
+
+ filemap_fdatawrite(inode->i_mapping);
+
+ if (is_dir)
+ F2FS_I(inode)->cp_task = NULL;
+
+ iput(inode);
+ /* We need to give cpu to another writers. */
+ if (ino == cur_ino)
+ cond_resched();
+ else
+ ino = cur_ino;
+ } else {
+ /*
+ * We should submit bio, since it exists several
+ * wribacking dentry pages in the freeing inode.
+ */
+ f2fs_submit_merged_write(sbi, DATA);
+ cond_resched();
+ }
+ goto retry;
+}
+
+int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
+{
+ struct list_head *head = &sbi->inode_list[DIRTY_META];
+ struct inode *inode;
+ struct f2fs_inode_info *fi;
+ s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
+
+ while (total--) {
+ if (unlikely(f2fs_cp_error(sbi)))
+ return -EIO;
+
+ spin_lock(&sbi->inode_lock[DIRTY_META]);
+ if (list_empty(head)) {
+ spin_unlock(&sbi->inode_lock[DIRTY_META]);
+ return 0;
+ }
+ fi = list_first_entry(head, struct f2fs_inode_info,
+ gdirty_list);
+ inode = igrab(&fi->vfs_inode);
+ spin_unlock(&sbi->inode_lock[DIRTY_META]);
+ if (inode) {
+ sync_inode_metadata(inode, 0);
+
+ /* it's on eviction */
+ if (is_inode_flag_set(inode, FI_DIRTY_INODE))
+ f2fs_update_inode_page(inode);
+ iput(inode);
+ }
+ }
+ return 0;
+}
+
+static void __prepare_cp_block(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ nid_t last_nid = nm_i->next_scan_nid;
+
+ next_free_nid(sbi, &last_nid);
+ ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
+ 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);
+}
+
+/*
+ * 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);
+ err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
+ if (err)
+ goto out;
+ cond_resched();
+ goto retry_flush_dents;
+ }
+
+ /*
+ * POR: we should ensure that there are no dirty node pages
+ * until finishing nat/sit flush. inode->i_blocks can be updated.
+ */
+ down_write(&sbi->node_change);
+
+ if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
+ up_write(&sbi->node_change);
+ f2fs_unlock_all(sbi);
+ err = f2fs_sync_inode_meta(sbi);
+ if (err)
+ goto out;
+ cond_resched();
+ goto retry_flush_dents;
+ }
+
+retry_flush_nodes:
+ down_write(&sbi->node_write);
+
+ if (get_pages(sbi, F2FS_DIRTY_NODES)) {
+ up_write(&sbi->node_write);
+ atomic_inc(&sbi->wb_sync_req[NODE]);
+ err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
+ atomic_dec(&sbi->wb_sync_req[NODE]);
+ if (err) {
+ up_write(&sbi->node_change);
+ f2fs_unlock_all(sbi);
+ goto out;
+ }
+ cond_resched();
+ goto retry_flush_nodes;
+ }
+
+ /*
+ * sbi->node_change is used only for AIO write_begin path which produces
+ * dirty node blocks and some checkpoint values by block allocation.
+ */
+ __prepare_cp_block(sbi);
+ up_write(&sbi->node_change);
+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);
+}
+
+void f2fs_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_WB_CP_DATA))
+ break;
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ break;
+
+ io_schedule_timeout(5*HZ);
+ }
+ finish_wait(&sbi->cp_wait, &wait);
+}
+
+static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+{
+ unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ unsigned long flags;
+
+ spin_lock_irqsave(&sbi->cp_lock, flags);
+
+ if ((cpc->reason & CP_UMOUNT) &&
+ le32_to_cpu(ckpt->cp_pack_total_block_count) >
+ sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
+ disable_nat_bits(sbi, false);
+
+ if (cpc->reason & CP_TRIMMED)
+ __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
+ else
+ __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
+
+ 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);
+
+ /* set this flag to activate crc|cp_ver for recovery */
+ __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
+ __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
+
+ spin_unlock_irqrestore(&sbi->cp_lock, flags);
+}
+
+static void commit_checkpoint(struct f2fs_sb_info *sbi,
+ void *src, block_t blk_addr)
+{
+ struct writeback_control wbc = {
+ .for_reclaim = 0,
+ };
+
+ /*
+ * pagevec_lookup_tag and lock_page again will take
+ * some extra time. Therefore, f2fs_update_meta_pages and
+ * f2fs_sync_meta_pages are combined in this function.
+ */
+ struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
+ int err;
+
+ memcpy(page_address(page), src, PAGE_SIZE);
+ set_page_dirty(page);
+
+ f2fs_wait_on_page_writeback(page, META, true);
+ f2fs_bug_on(sbi, PageWriteback(page));
+ if (unlikely(!clear_page_dirty_for_io(page)))
+ f2fs_bug_on(sbi, 1);
+
+ /* writeout cp pack 2 page */
+ err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
+ if (unlikely(err && f2fs_cp_error(sbi))) {
+ f2fs_put_page(page, 1);
+ return;
+ }
+
+ f2fs_bug_on(sbi, err);
+ f2fs_put_page(page, 0);
+
+ /* submit checkpoint (with barrier if NOBARRIER is not set) */
+ f2fs_submit_merged_write(sbi, META_FLUSH);
+}
+
+static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
+ block_t start_blk;
+ unsigned int data_sum_blocks, orphan_blocks;
+ __u32 crc32 = 0;
+ int i;
+ int cp_payload_blks = __cp_payload(sbi);
+ struct super_block *sb = sbi->sb;
+ struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
+ u64 kbytes_written;
+ int err;
+
+ /* Flush all the NAT/SIT pages */
+ while (get_pages(sbi, F2FS_DIRTY_META)) {
+ f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
+ if (unlikely(f2fs_cp_error(sbi)))
+ break;
+ }
+
+ /*
+ * modify checkpoint
+ * version number is already updated
+ */
+ ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
+ 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);
+ }
+
+ /* 2 cp + n data seg summary + orphan inode blocks */
+ data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
+ spin_lock_irqsave(&sbi->cp_lock, flags);
+ 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);
+ spin_unlock_irqrestore(&sbi->cp_lock, flags);
+
+ 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);
+
+ /* update ckpt flag for checkpoint */
+ update_ckpt_flags(sbi, cpc);
+
+ /* 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(sbi, 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_next_addr(sbi);
+
+ /* write nat bits */
+ if (enabled_nat_bits(sbi, cpc)) {
+ __u64 cp_ver = cur_cp_version(ckpt);
+ block_t blk;
+
+ cp_ver |= ((__u64)crc32 << 32);
+ *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
+
+ blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks;
+ for (i = 0; i < nm_i->nat_bits_blocks; i++)
+ f2fs_update_meta_page(sbi, nm_i->nat_bits +
+ (i << F2FS_BLKSIZE_BITS), blk + i);
+
+ /* Flush all the NAT BITS pages */
+ while (get_pages(sbi, F2FS_DIRTY_META)) {
+ f2fs_sync_meta_pages(sbi, META, LONG_MAX,
+ FS_CP_META_IO);
+ if (unlikely(f2fs_cp_error(sbi)))
+ break;
+ }
+ }
+
+ /* write out checkpoint buffer at block 0 */
+ f2fs_update_meta_page(sbi, ckpt, start_blk++);
+
+ for (i = 1; i < 1 + cp_payload_blks; i++)
+ f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
+ start_blk++);
+
+ if (orphan_num) {
+ write_orphan_inodes(sbi, start_blk);
+ start_blk += orphan_blocks;
+ }
+
+ f2fs_write_data_summaries(sbi, start_blk);
+ start_blk += data_sum_blocks;
+
+ /* Record write statistics in the hot node summary */
+ kbytes_written = sbi->kbytes_written;
+ if (sb->s_bdev->bd_part)
+ kbytes_written += BD_PART_WRITTEN(sbi);
+
+ seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
+
+ if (__remain_node_summaries(cpc->reason)) {
+ f2fs_write_node_summaries(sbi, start_blk);
+ start_blk += NR_CURSEG_NODE_TYPE;
+ }
+
+ /* update user_block_counts */
+ sbi->last_valid_block_count = sbi->total_valid_block_count;
+ percpu_counter_set(&sbi->alloc_valid_block_count, 0);
+
+ /* Here, we have one bio having CP pack except cp pack 2 page */
+ f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
+
+ /* wait for previous submitted meta pages writeback */
+ f2fs_wait_on_all_pages_writeback(sbi);
+
+ /* flush all device cache */
+ err = f2fs_flush_device_cache(sbi);
+ if (err)
+ return err;
+
+ /* barrier and flush checkpoint cp pack 2 page if it can */
+ commit_checkpoint(sbi, ckpt, start_blk);
+ f2fs_wait_on_all_pages_writeback(sbi);
+
+ /*
+ * invalidate intermediate page cache borrowed from meta inode
+ * which are used for migration of encrypted inode's blocks.
+ */
+ if (f2fs_sb_has_encrypt(sbi->sb))
+ invalidate_mapping_pages(META_MAPPING(sbi),
+ MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
+
+ f2fs_release_ino_entry(sbi, false);
+
+ f2fs_reset_fsync_node_info(sbi);
+
+ clear_sbi_flag(sbi, SBI_IS_DIRTY);
+ clear_sbi_flag(sbi, SBI_NEED_CP);
+ __set_cp_next_pack(sbi);
+
+ /*
+ * redirty superblock if metadata like node page or inode cache is
+ * updated during writing checkpoint.
+ */
+ if (get_pages(sbi, F2FS_DIRTY_NODES) ||
+ get_pages(sbi, F2FS_DIRTY_IMETA))
+ set_sbi_flag(sbi, SBI_IS_DIRTY);
+
+ f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
+
+ return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
+}
+
+/*
+ * We guarantee that this checkpoint procedure will not fail.
+ */
+int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+{
+ struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+ unsigned long long ckpt_ver;
+ int err = 0;
+
+ mutex_lock(&sbi->cp_mutex);
+
+ if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
+ ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
+ ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
+ goto out;
+ if (unlikely(f2fs_cp_error(sbi))) {
+ err = -EIO;
+ goto out;
+ }
+ if (f2fs_readonly(sbi->sb)) {
+ err = -EROFS;
+ goto out;
+ }
+
+ trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
+
+ err = block_operations(sbi);
+ if (err)
+ goto out;
+
+ trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
+
+ f2fs_flush_merged_writes(sbi);
+
+ /* this is the case of multiple fstrims without any changes */
+ if (cpc->reason & CP_DISCARD) {
+ if (!f2fs_exist_trim_candidates(sbi, cpc)) {
+ unblock_operations(sbi);
+ goto out;
+ }
+
+ if (NM_I(sbi)->dirty_nat_cnt == 0 &&
+ SIT_I(sbi)->dirty_sentries == 0 &&
+ prefree_segments(sbi) == 0) {
+ f2fs_flush_sit_entries(sbi, cpc);
+ f2fs_clear_prefree_segments(sbi, cpc);
+ unblock_operations(sbi);
+ goto out;
+ }
+ }
+
+ /*
+ * 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 */
+ f2fs_flush_nat_entries(sbi, cpc);
+ f2fs_flush_sit_entries(sbi, cpc);
+
+ /* unlock all the fs_lock[] in do_checkpoint() */
+ err = do_checkpoint(sbi, cpc);
+ if (err)
+ f2fs_release_discard_addrs(sbi);
+ else
+ f2fs_clear_prefree_segments(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);
+
+ /* do checkpoint periodically */
+ f2fs_update_time(sbi, CP_TIME);
+ trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
+out:
+ mutex_unlock(&sbi->cp_mutex);
+ return err;
+}
+
+void f2fs_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 f2fs_create_checkpoint_caches(void)
+{
+ ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
+ sizeof(struct ino_entry));
+ if (!ino_entry_slab)
+ return -ENOMEM;
+ f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
+ sizeof(struct inode_entry));
+ if (!f2fs_inode_entry_slab) {
+ kmem_cache_destroy(ino_entry_slab);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void f2fs_destroy_checkpoint_caches(void)
+{
+ kmem_cache_destroy(ino_entry_slab);
+ kmem_cache_destroy(f2fs_inode_entry_slab);
+}