From: Mike Marshall <hubcap@xxxxxxxxxxxx>
Al Viro pointed out that I broke some acl functionality...
* ACLs could not be fully removed
* posix_acl_chmod would be called while the old ACL was still cached
* new mode propagated to orangefs server before ACL.
... when I tried to make sure that modes that got changed as a
result of ACL-sets would be sent back to the orangefs server.
Not wanting to try and change the code without having some cases to
test it with, I began to hunt for setfacl examples that were expressible
in pure mode. Along the way I found examples like the following
which confused me:
user A had a file (/home/A/asdf) with mode 740
user B was in user A's group
user C was not in user A's group
setfacl -m u:C:rwx /home/A/asdf
The above setfacl caused ls -l /home/A/asdf to show a mode of 770,
making it appear that all users in user A's group now had full access
to /home/A/asdf, however, user B still only had read acces. Madness.
Anywho, I finally found that the above (whacky as it is) appears to
be "posixly on purpose" and explained in acl(5):
If the ACL has an ACL_MASK entry, the group permissions correspond
to the permissions of the ACL_MASK entry.
Signed-off-by: Mike Marshall <hubcap@xxxxxxxxxxxx>
---
fs/orangefs/acl.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/fs/orangefs/acl.c b/fs/orangefs/acl.c
index eced272a3c57..a25e6c890975 100644
--- a/fs/orangefs/acl.c
+++ b/fs/orangefs/acl.c
@@ -122,6 +122,8 @@ int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
struct iattr iattr;
int rc;
+ memset(&iattr, 0, sizeof iattr);
+
if (type == ACL_TYPE_ACCESS && acl) {
/*
* posix_acl_update_mode checks to see if the permissions
@@ -138,18 +140,17 @@ int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
return error;
}
- if (acl) {
- rc = __orangefs_set_acl(inode, acl, type);
- } else {
+ if (inode->i_mode != iattr.ia_mode)
iattr.ia_valid = ATTR_MODE;
- rc = __orangefs_setattr(inode, &iattr);
- }
- return rc;
-
- } else {
- return -EINVAL;
}
+
+ rc = __orangefs_set_acl(inode, acl, type);
+
+ if (!rc && (iattr.ia_valid == ATTR_MODE))
+ rc = __orangefs_setattr(inode, &iattr);
+
+ return rc;
}
int orangefs_init_acl(struct inode *inode, struct inode *dir)
--
2.25.4
