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>
---
fs/f2fs/file.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f92a9fba9991..7ae5a5af5ed9 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1036,7 +1036,7 @@ 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,
@@ -1117,6 +1117,9 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry
*dentry,
if (err)
return err;
+ if (IS_DEVICE_ALIASING(inode))
+ f2fs_destroy_extent_tree(inode);
+
spin_lock(&fi->i_size_lock);
inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
fi->last_disk_size = i_size_read(inode);
--
2.49.0.rc1.451.g8f38331e32-goog
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