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authorChristian Brauner <brauner@kernel.org>2022-09-22 18:17:05 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2022-10-20 11:13:28 +0300
commit079da629383ea960dfa0615e18d51d8bd121bd0c (patch)
tree91651d3be2b3e06467465d6ffba2bc4265ecae85 /fs/9p/vfs_inode_dotl.c
parent6cd4d4e8b6e1495eb0cafa3a59d1fde137a98d22 (diff)
downloadlinux-079da629383ea960dfa0615e18d51d8bd121bd0c.tar.xz
9p: implement set acl method
The current way of setting and getting posix acls through the generic xattr interface is error prone and type unsafe. The vfs needs to interpret and fixup posix acls before storing or reporting it to userspace. Various hacks exist to make this work. The code is hard to understand and difficult to maintain in it's current form. Instead of making this work by hacking posix acls through xattr handlers we are building a dedicated posix acl api around the get and set inode operations. This removes a lot of hackiness and makes the codepaths easier to maintain. A lot of background can be found in [1]. In order to build a type safe posix api around get and set acl we need all filesystem to implement get and set acl. So far 9p implemented a ->get_inode_acl() operation that didn't require access to the dentry in order to allow (limited) permission checking via posix acls in the vfs. Now that we have get and set acl inode operations that take a dentry argument we can give 9p get and set acl inode operations. This is mostly a light refactoring of the codepaths currently used in 9p posix acl xattr handler. After we have fully implemented the posix acl api and switched the vfs over to it, the 9p specific posix acl xattr handler and associated code will be removed. Note, until the vfs has been switched to the new posix acl api this patch is a non-functional change. Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1] Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'fs/9p/vfs_inode_dotl.c')
-rw-r--r--fs/9p/vfs_inode_dotl.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index a4211fcb9168..03c1743c4aff 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -985,6 +985,7 @@ const struct inode_operations v9fs_dir_inode_operations_dotl = {
.listxattr = v9fs_listxattr,
.get_inode_acl = v9fs_iop_get_inode_acl,
.get_acl = v9fs_iop_get_acl,
+ .set_acl = v9fs_iop_set_acl,
};
const struct inode_operations v9fs_file_inode_operations_dotl = {
@@ -993,6 +994,7 @@ const struct inode_operations v9fs_file_inode_operations_dotl = {
.listxattr = v9fs_listxattr,
.get_inode_acl = v9fs_iop_get_inode_acl,
.get_acl = v9fs_iop_get_acl,
+ .set_acl = v9fs_iop_set_acl,
};
const struct inode_operations v9fs_symlink_inode_operations_dotl = {