[PATCH] f2fs: avoid clear valid page

From: Chao Yu
Date: Wed Aug 12 2015 - 05:49:09 EST

In f2fs_delete_entry, if last dirent is remove from the dentry page,
we will try to punch that page since it has no valid date in it.

But truncate_hole which is used for punching could fail because of
no memory or IO error, if that happened, we'd better skip clearing
this valid dentry page.

Signed-off-by: Chao Yu <chao2.yu@xxxxxxxxxxx>
fs/f2fs/dir.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index a34ebd8..8f15fc1 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -718,8 +718,8 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
if (inode)
f2fs_drop_nlink(dir, inode, NULL);

- if (bit_pos == NR_DENTRY_IN_BLOCK) {
- truncate_hole(dir, page->index, page->index + 1);
+ if (bit_pos == NR_DENTRY_IN_BLOCK &&
+ !truncate_hole(dir, page->index, page->index + 1)) {

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