In the following scenarios, F2FS cannot reclaim truncated space.
case 1:
write file A, size is 1G | CP | truncate A to 1M | fsync A | SPO
case 2:
CP | write file A, size is 1G | fsync A | truncate A to 1M | fsync A |SPO
During the recovery process, F2FS will recover file A,
but the 1-1G space cannot be reclaimed.
Signed-off-by: Wang Xiaojun <wangxiao...@vivo.com>
---
fs/f2fs/f2fs.h | 1 +
fs/f2fs/recovery.c | 15 ++++++++++++++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 46be7560548c..d37204567b66 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -459,6 +459,7 @@ struct fsync_inode_entry {
struct inode *inode; /* vfs inode pointer */
block_t blkaddr; /* block address locating the last fsync */
block_t last_dentry; /* block address locating the last dentry */
+ loff_t old_max_size; /* old max file size for truncate */
};
#define nats_in_cursum(jnl) (le16_to_cpu((jnl)->n_nats))
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 4cb3a91801b4..2f482742857c 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -95,6 +95,7 @@ static struct fsync_inode_entry *add_fsync_inode(struct
f2fs_sb_info *sbi,
entry = f2fs_kmem_cache_alloc(fsync_entry_slab,
GFP_F2FS_ZERO, true, NULL);
entry->inode = inode;
+ entry->old_max_size = i_size_read(inode);
list_add_tail(&entry->list, head);
return entry;
@@ -828,6 +829,8 @@ static int recover_data(struct f2fs_sb_info *sbi, struct
list_head *inode_list,
break;
}
recovered_inode++;
+ if (entry->old_max_size < i_size_read(entry->inode))
+ entry->old_max_size = i_size_read(entry->inode);
}
if (entry->last_dentry == blkaddr) {
err = recover_dentry(entry->inode, folio, dir_list);
@@ -844,8 +847,18 @@ static int recover_data(struct f2fs_sb_info *sbi, struct
list_head *inode_list,
}
recovered_dnode++;
- if (entry->blkaddr == blkaddr)
+ if (entry->blkaddr == blkaddr) {
+ if (entry->old_max_size > i_size_read(entry->inode)) {
+ err = f2fs_truncate_blocks(entry->inode,
+ i_size_read(entry->inode), false);
+ if (err) {
+ f2fs_folio_put(folio, true);
+ break;
+ }
+ f2fs_mark_inode_dirty_sync(entry->inode, true);
+ }
list_move_tail(&entry->list, tmp_inode_list);
+ }
next:
ra_blocks = adjust_por_ra_blocks(sbi, ra_blocks, blkaddr,
next_blkaddr_of_node(folio));
--
2.34.1
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