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[PATCH] knfsd: nfsd4: acls: fix inheritance 

We can be a little more flexible about the flags allowed for inheritance (in
particular, we can deal with either the presence or the absence of
INHERIT_ONLY), but we should probably reject other combinations that we don't
understand.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
J.Bruce Fields 2006-10-04 02:16:12 -07:00 committed by Linus Torvalds
parent 09229edb68
commit b548edc2dd
1 changed files with 30 additions and 13 deletions
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43
fs/nfsd/nfs4acl.c
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@ -63,6 +63,8 @@
#define NFS4_INHERITANCE_FLAGS (NFS4_ACE_FILE_INHERIT_ACE \
| NFS4_ACE_DIRECTORY_INHERIT_ACE | NFS4_ACE_INHERIT_ONLY_ACE)
#define NFS4_SUPPORTED_FLAGS (NFS4_INHERITANCE_FLAGS | NFS4_ACE_IDENTIFIER_GROUP)
#define MASK_EQUAL(mask1, mask2) \
( ((mask1) & NFS4_ACE_MASK_ALL) == ((mask2) & NFS4_ACE_MASK_ALL) )
@ -721,22 +723,37 @@ nfs4_acl_split(struct nfs4_acl *acl, struct nfs4_acl *dacl)
ace->type != NFS4_ACE_ACCESS_DENIED_ACE_TYPE)
return -EINVAL;
if ((ace->flag & NFS4_INHERITANCE_FLAGS)
!= NFS4_INHERITANCE_FLAGS)
if (ace->flag & ~NFS4_SUPPORTED_FLAGS)
return -EINVAL;
switch (ace->flag & NFS4_INHERITANCE_FLAGS) {
case 0:
/* Leave this ace in the effective acl: */
continue;
error = nfs4_acl_add_ace(dacl, ace->type, ace->flag,
case NFS4_INHERITANCE_FLAGS:
/* Add this ace to the default acl and remove it
* from the effective acl: */
error = nfs4_acl_add_ace(dacl, ace->type, ace->flag,
ace->access_mask, ace->whotype, ace->who);
if (error < 0)
goto out;
list_del(h);
kfree(ace);
acl->naces--;
if (error)
return error;
list_del(h);
kfree(ace);
acl->naces--;
break;
case NFS4_INHERITANCE_FLAGS & ~NFS4_ACE_INHERIT_ONLY_ACE:
/* Add this ace to the default, but leave it in
* the effective acl as well: */
error = nfs4_acl_add_ace(dacl, ace->type, ace->flag,
ace->access_mask, ace->whotype, ace->who);
if (error)
return error;
break;
default:
return -EINVAL;
}
}
out:
return error;
return 0;
}
static short