[Virtio-fs] [PATCH 8/9] virtio-fs: honor RLIMIT_FSIZE in fuse_file_fallocate

[Liu Bo]

generic/228 reported this failure that fuse fallocate does not honor what
'ulimit -f' has set.

This adds the necessary inode_newsize_ok() check.

Signed-off-by: Liu Bo <bo.liu at linux.alibaba.com>
---
 fs/fuse/file.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 712fd97..6ab23d7 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3589,6 +3589,13 @@ static long __fuse_file_fallocate(struct file *file, int mode,
 		fuse_sync_writes(inode);
 	}
 
+	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+	    offset + length > i_size_read(inode)) {
+		err = inode_newsize_ok(inode, offset + length);
+		if (err)
+			return err;
+	}
+
 	if (!(mode & FALLOC_FL_KEEP_SIZE))
 		set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
 
-- 
1.8.3.1