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always call inode_change_ok early in ->setattr

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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 <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Christoph Hellwig 2010-06-04 11:30:03 +02:00 • committed by Al Viro
commit db78b877f7
6 changed files with 48 additions and 48 deletions
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10
mm/shmem.c
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@ -767,6 +767,10 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
loff_t newsize = attr->ia_size;
int error;
error = inode_change_ok(inode, attr);
if (error)
return error;
if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)
&& newsize != inode->i_size) {
struct page *page = NULL;
@ -809,11 +813,9 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
shmem_truncate_range(inode, newsize, (loff_t)-1);
}
error = inode_change_ok(inode, attr);
if (!error)
setattr_copy(inode, attr);
setattr_copy(inode, attr);
#ifdef CONFIG_TMPFS_POSIX_ACL
if (!error && (attr->ia_valid & ATTR_MODE))
if (attr->ia_valid & ATTR_MODE)
error = generic_acl_chmod(inode);
#endif
return error;