From: Daeho Jeong <daehoje...@google.com>
support a file truncation to zero size for device aliasing files.
Signed-off-by: Daeho Jeong <daehoje...@google.com>
---
v2: make the extent length zero
---
fs/f2fs/file.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f92a9fba9991..69952f208086 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -775,6 +775,11 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from,
bool lock)
f2fs_update_time(sbi, REQ_TIME);
f2fs_put_page(ipage, 1);
+
+ write_lock(&et->lock);
+ et->largest.len = 0;
+ write_unlock(&et->lock);
+
goto out;
}
@@ -1036,7 +1041,7 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry
*dentry,
if ((attr->ia_valid & ATTR_SIZE)) {
if (!f2fs_is_compress_backend_ready(inode) ||
- IS_DEVICE_ALIASING(inode))
+ (IS_DEVICE_ALIASING(inode) && attr->ia_size))
return -EOPNOTSUPP;
if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
!IS_ALIGNED(attr->ia_size,
--
2.49.0.395.g12beb8f557-goog
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