From db78b877f7744bec4a9d9f9e7d10da3931d7cd39 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Jun 2010 11:30:03 +0200 Subject: always call inode_change_ok early in ->setattr Make sure we call inode_change_ok before doing any changes in ->setattr, and make sure to call it even if our fs wants to ignore normal UNIX permissions, but use the ATTR_FORCE to skip those. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- fs/fuse/dir.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'fs/fuse/dir.c') diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 3cdc5f7..43a9b37 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1270,11 +1270,12 @@ static int fuse_do_setattr(struct dentry *entry, struct iattr *attr, if (!fuse_allow_task(fc, current)) return -EACCES; - if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { - err = inode_change_ok(inode, attr); - if (err) - return err; - } + if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS)) + attr->ia_valid |= ATTR_FORCE; + + err = inode_change_ok(inode, attr); + if (err) + return err; if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc) return 0; -- cgit v1.1 From 2c27c65ed0696f0b5df2dad2cf6462d72164d547 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Jun 2010 11:30:04 +0200 Subject: 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 Signed-off-by: Al Viro --- fs/fuse/dir.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'fs/fuse/dir.c') diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 43a9b37..3978a42 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1280,12 +1280,8 @@ static int fuse_do_setattr(struct dentry *entry, struct iattr *attr, if ((attr->ia_valid & ATTR_OPEN) && fc->atomic_o_trunc) return 0; - if (attr->ia_valid & ATTR_SIZE) { - err = inode_newsize_ok(inode, attr->ia_size); - if (err) - return err; + if (attr->ia_valid & ATTR_SIZE) is_truncate = true; - } req = fuse_get_req(fc); if (IS_ERR(req)) -- cgit v1.1