[fs/9P] Add posixacl mount option
The mount option access=client is overloaded as it assumes acl too.
Adding posixacl option to enable POSIX ACLs makes it explicit and clear.
Also it is convenient in the future to add other types of acls like richacls.
Ideally, the access mode 'client' should be just like V9FS_ACCESS_USER
except it underscores the location of access check.
Traditional 9P protocol lets the server perform access checks but with
this mode, all the access checks will be performed on the client itself.
Server just follows the client's directive.
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index 0a2e480..1ee3434 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -59,7 +59,8 @@
struct v9fs_session_info *v9ses;
v9ses = v9fs_inode2v9ses(inode);
- if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
+ if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
+ ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL);
set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
return 0;
@@ -104,9 +105,10 @@
return -ECHILD;
v9ses = v9fs_inode2v9ses(inode);
- if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) {
+ if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
+ ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
/*
- * On access = client mode get the acl
+ * On access = client and acl = on mode get the acl
* values from the server
*/
return 0;