diff options
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4file.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index fc68ba5f030c..4f463dd8bae3 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -199,8 +199,10 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, u64 src_off, u64 dst_off, u64 count) { struct inode *dst_inode = file_inode(dst_file); + struct nfs_server *server = NFS_SERVER(dst_inode); struct fd src_file; struct inode *src_inode; + unsigned int bs = server->clone_blksize; int ret; /* dst file must be opened for writing */ @@ -238,6 +240,15 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, src_inode->i_sb != dst_inode->i_sb) goto out_fput; + /* check alignment w.r.t. clone_blksize */ + ret = -EINVAL; + if (bs) { + if (!IS_ALIGNED(src_off, bs) || !IS_ALIGNED(dst_off, bs)) + goto out_fput; + if (!IS_ALIGNED(count, bs) && i_size_read(src_inode) != (src_off + count)) + goto out_fput; + } + /* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */ if (dst_inode < src_inode) { mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_PARENT); |