check ATTR_SIZE contraints in inode_change_ok
Make sure we check the truncate constraints early on in ->setattr by adding
those checks to inode_change_ok. Also clean up and document inode_change_ok
to make this obvious.
As a fallout we don't have to call inode_newsize_ok from simple_setsize and
simplify it down to a truncate_setsize which doesn't return an error. This
simplifies a lot of setattr implementations and means we use truncate_setsize
almost everywhere. Get rid of fat_setsize now that it's trivial and mark
ext2_setsize static to make the calling convention obvious.
Keep the inode_newsize_ok in vmtruncate for now as all callers need an
audit for its removal anyway.
Note: setattr code in ecryptfs doesn't call inode_change_ok at all and
needs a deeper audit, but that is left for later.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index b3dec19..65794b8 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -333,10 +333,7 @@
/* XXX: this is missing some actual on-disk truncation.. */
if (ia_valid & ATTR_SIZE)
- error = simple_setsize(inode, attr->ia_size);
-
- if (error)
- goto out;
+ truncate_setsize(inode, attr->ia_size);
if (ia_valid & ATTR_MTIME) {
inode->i_mtime = attr->ia_mtime;