#include "node.h"
#include "segment.h"
+/*
+ * Roll forward recovery scenarios.
+ *
+ * [Term] F: fsync_mark, D: dentry_mark
+ *
+ * 1. inode(x) | CP | inode(x) | dnode(F)
+ * -> Update the latest inode(x).
+ *
+ * 2. inode(x) | CP | inode(F) | dnode(F)
+ * -> No problem.
+ *
+ * 3. inode(x) | CP | dnode(F) | inode(x)
+ * -> Recover to the latest dnode(F), and drop the last inode(x)
+ *
+ * 4. inode(x) | CP | dnode(F) | inode(F)
+ * -> No problem.
+ *
+ * 5. CP | inode(x) | dnode(F)
+ * -> The inode(DF) was missing. Should drop this dnode(F).
+ *
+ * 6. CP | inode(DF) | dnode(F)
+ * -> No problem.
+ *
+ * 7. CP | dnode(F) | inode(DF)
+ * -> If f2fs_iget fails, then goto next to find inode(DF).
+ *
+ * 8. CP | dnode(F) | inode(x)
+ * -> If f2fs_iget fails, then goto next to find inode(DF).
+ * But it will fail due to no inode(DF).
+ */
+
static struct kmem_cache *fsync_entry_slab;
bool space_for_roll_forward(struct f2fs_sb_info *sbi)
return NULL;
}
-static int recover_dentry(struct page *ipage, struct inode *inode)
+static int recover_dentry(struct inode *inode, struct page *ipage)
{
struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
nid_t pino = le32_to_cpu(raw_inode->i_pino);
err = -EEXIST;
goto out_unmap_put;
}
- err = acquire_orphan_inode(F2FS_SB(inode->i_sb));
+ err = acquire_orphan_inode(F2FS_I_SB(inode));
if (err) {
iput(einode);
goto out_unmap_put;
return err;
}
-static int recover_inode(struct inode *inode, struct page *node_page)
+static void recover_inode(struct inode *inode, struct page *page)
{
- struct f2fs_inode *raw_inode = F2FS_INODE(node_page);
-
- if (!IS_INODE(node_page))
- return 0;
+ struct f2fs_inode *raw = F2FS_INODE(page);
- inode->i_mode = le16_to_cpu(raw_inode->i_mode);
- i_size_write(inode, le64_to_cpu(raw_inode->i_size));
- inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
- inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime);
- inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime);
- inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
- inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec);
- inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec);
-
- if (is_dent_dnode(node_page))
- return recover_dentry(node_page, inode);
+ inode->i_mode = le16_to_cpu(raw->i_mode);
+ i_size_write(inode, le64_to_cpu(raw->i_size));
+ inode->i_atime.tv_sec = le64_to_cpu(raw->i_mtime);
+ inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime);
+ inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime);
+ inode->i_atime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
+ inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec);
+ inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode: ino = %x, name = %s",
- ino_of_node(node_page), raw_inode->i_name);
- return 0;
+ ino_of_node(page), F2FS_INODE(page)->i_name);
}
static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
{
unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
struct curseg_info *curseg;
- struct page *page;
+ struct page *page = NULL;
block_t blkaddr;
int err = 0;
curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
- /* read node page */
- page = alloc_page(GFP_F2FS_ZERO);
- if (!page)
- return -ENOMEM;
- lock_page(page);
-
while (1) {
struct fsync_inode_entry *entry;
- err = f2fs_submit_page_bio(sbi, page, blkaddr, READ_SYNC);
- if (err)
- return err;
+ if (blkaddr < MAIN_BLKADDR(sbi) || blkaddr >= MAX_BLKADDR(sbi))
+ return 0;
- lock_page(page);
+ page = get_meta_page_ra(sbi, blkaddr);
if (cp_ver != cpver_of_node(page))
break;
}
/* add this fsync inode to the list */
- entry = kmem_cache_alloc(fsync_entry_slab, GFP_NOFS);
+ entry = kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
if (!entry) {
err = -ENOMEM;
break;
}
-
+ /*
+ * CP | dnode(F) | inode(DF)
+ * For this case, we should not give up now.
+ */
entry->inode = f2fs_iget(sbi->sb, ino_of_node(page));
if (IS_ERR(entry->inode)) {
err = PTR_ERR(entry->inode);
kmem_cache_free(fsync_entry_slab, entry);
+ if (err == -ENOENT)
+ goto next;
break;
}
list_add_tail(&entry->list, head);
}
entry->blkaddr = blkaddr;
- err = recover_inode(entry->inode, page);
- if (err && err != -ENOENT)
- break;
+ if (IS_INODE(page)) {
+ entry->last_inode = blkaddr;
+ if (is_dent_dnode(page))
+ entry->last_dentry = blkaddr;
+ }
next:
/* check next segment */
blkaddr = next_blkaddr_of_node(page);
+ f2fs_put_page(page, 1);
}
-
- unlock_page(page);
- __free_pages(page, 0);
-
+ f2fs_put_page(page, 1);
return err;
}
ino = ino_of_node(node_page);
f2fs_put_page(node_page, 1);
- /* Deallocate previous index in the node page */
- inode = f2fs_iget(sbi->sb, ino);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
+ if (ino != dn->inode->i_ino) {
+ /* Deallocate previous index in the node page */
+ inode = f2fs_iget(sbi->sb, ino);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+ } else {
+ inode = dn->inode;
+ }
bidx = start_bidx_of_node(offset, F2FS_I(inode)) +
- le16_to_cpu(sum.ofs_in_node);
+ le16_to_cpu(sum.ofs_in_node);
- truncate_hole(inode, bidx, bidx + 1);
- iput(inode);
+ if (ino != dn->inode->i_ino) {
+ truncate_hole(inode, bidx, bidx + 1);
+ iput(inode);
+ } else {
+ struct dnode_of_data tdn;
+ set_new_dnode(&tdn, inode, dn->inode_page, NULL, 0);
+ if (get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
+ return 0;
+ if (tdn.data_blkaddr != NULL_ADDR)
+ truncate_data_blocks_range(&tdn, 1);
+ f2fs_put_page(tdn.node_page, 1);
+ }
return 0;
}
f2fs_wait_on_page_writeback(dn.node_page, NODE);
get_node_info(sbi, dn.nid, &ni);
- f2fs_bug_on(ni.ino != ino_of_node(page));
- f2fs_bug_on(ofs_of_node(dn.node_page) != ofs_of_node(page));
+ f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
+ f2fs_bug_on(sbi, ofs_of_node(dn.node_page) != ofs_of_node(page));
for (; start < end; start++) {
block_t src, dest;
if (src == NULL_ADDR) {
err = reserve_new_block(&dn);
/* We should not get -ENOSPC */
- f2fs_bug_on(err);
+ f2fs_bug_on(sbi, err);
}
/* Check the previous node page having this index */
{
unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
struct curseg_info *curseg;
- struct page *page;
+ struct page *page = NULL;
int err = 0;
block_t blkaddr;
curseg = CURSEG_I(sbi, type);
blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
- /* read node page */
- page = alloc_page(GFP_F2FS_ZERO);
- if (!page)
- return -ENOMEM;
-
- lock_page(page);
-
while (1) {
struct fsync_inode_entry *entry;
- err = f2fs_submit_page_bio(sbi, page, blkaddr, READ_SYNC);
- if (err)
- return err;
+ if (blkaddr < MAIN_BLKADDR(sbi) || blkaddr >= MAX_BLKADDR(sbi))
+ break;
- lock_page(page);
+ page = get_meta_page_ra(sbi, blkaddr);
- if (cp_ver != cpver_of_node(page))
+ if (cp_ver != cpver_of_node(page)) {
+ f2fs_put_page(page, 1);
break;
+ }
entry = get_fsync_inode(head, ino_of_node(page));
if (!entry)
goto next;
-
+ /*
+ * inode(x) | CP | inode(x) | dnode(F)
+ * In this case, we can lose the latest inode(x).
+ * So, call recover_inode for the inode update.
+ */
+ if (entry->last_inode == blkaddr)
+ recover_inode(entry->inode, page);
+ if (entry->last_dentry == blkaddr) {
+ err = recover_dentry(entry->inode, page);
+ if (err) {
+ f2fs_put_page(page, 1);
+ break;
+ }
+ }
err = do_recover_data(sbi, entry->inode, page, blkaddr);
- if (err)
+ if (err) {
+ f2fs_put_page(page, 1);
break;
+ }
if (entry->blkaddr == blkaddr) {
iput(entry->inode);
next:
/* check next segment */
blkaddr = next_blkaddr_of_node(page);
+ f2fs_put_page(page, 1);
}
-
- unlock_page(page);
- __free_pages(page, 0);
-
if (!err)
allocate_new_segments(sbi);
return err;
/* step #2: recover data */
err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
if (!err)
- f2fs_bug_on(!list_empty(&inode_list));
+ f2fs_bug_on(sbi, !list_empty(&inode_list));
out:
destroy_fsync_dnodes(&inode_list);
kmem_cache_destroy(fsync_entry_slab);
+ /* truncate meta pages to be used by the recovery */
+ truncate_inode_pages_range(META_MAPPING(sbi),
+ MAIN_BLKADDR(sbi) << PAGE_CACHE_SHIFT, -1);
+
if (err) {
truncate_inode_pages_final(NODE_MAPPING(sbi));
truncate_inode_pages_final(META_MAPPING(sbi));
set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
mutex_unlock(&sbi->cp_mutex);
} else if (need_writecp) {
+ struct cp_control cpc = {
+ .reason = CP_SYNC,
+ };
mutex_unlock(&sbi->cp_mutex);
- write_checkpoint(sbi, false);
+ write_checkpoint(sbi, &cpc);
} else {
mutex_unlock(&sbi->cp_mutex);
}
OSDN Git Service
