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fs: take the ACL checks to common code

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Replace the ->check_acl method with a ->get_acl method that simply reads an
ACL from disk after having a cache miss.  This means we can replace the ACL
checking boilerplate code with a single implementation in namei.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig
2011-07-23 17:37:31 +02:00
committed by Al Viro
parent edde854e8b
commit 4e34e719e4
52 changed files with 92 additions and 294 deletions
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7
Documentation/filesystems/porting
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@ -407,10 +407,11 @@ to some pointer to returning that pointer. On errors return ERR_PTR(...).
--
[mandatory]
->permission(), generic_permission() and ->check_acl() have lost flags
->permission() and generic_permission()have lost flags
argument; instead of passing IPERM_FLAG_RCU we add MAY_NOT_BLOCK into mask.
generic_permission() has also lost the check_acl argument; if you want
non-NULL to be used for that inode, put it into ->i_op->check_acl.
generic_permission() has also lost the check_acl argument; ACL checking
has been taken to VFS and filesystems need to provide a non-NULL ->i_op->get_acl
to read an ACL from disk.
--
[mandatory]