NFSv3: Client-side nfsacl caching fix
Fix two errors in the client-side acl cache: First, when nfs3_proc_getacl
requests only the default acl of a file and the access acl is not cached
already, a NULL access acl entry is cached instead of ERR_PTR(-EAGAIN)
("not cached").
Second, update the cached acls in nfs3_proc_setacls: nfs_refresh_inode does
not always invalidate the cached acls, and when it does not, the cached acls
get out of sync.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 3328787..7322da4 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -172,8 +172,10 @@
inode->i_ino, acl, dfacl);
spin_lock(&inode->i_lock);
__nfs3_forget_cached_acls(NFS_I(inode));
- nfsi->acl_access = posix_acl_dup(acl);
- nfsi->acl_default = posix_acl_dup(dfacl);
+ if (!IS_ERR(acl))
+ nfsi->acl_access = posix_acl_dup(acl);
+ if (!IS_ERR(dfacl))
+ nfsi->acl_default = posix_acl_dup(dfacl);
spin_unlock(&inode->i_lock);
}
@@ -254,7 +256,9 @@
res.acl_access = NULL;
}
}
- nfs3_cache_acls(inode, res.acl_access, res.acl_default);
+ nfs3_cache_acls(inode,
+ (res.mask & NFS_ACL) ? res.acl_access : ERR_PTR(-EINVAL),
+ (res.mask & NFS_DFACL) ? res.acl_default : ERR_PTR(-EINVAL));
switch(type) {
case ACL_TYPE_ACCESS:
@@ -329,6 +333,7 @@
switch (status) {
case 0:
status = nfs_refresh_inode(inode, &fattr);
+ nfs3_cache_acls(inode, acl, dfacl);
break;
case -EPFNOSUPPORT:
case -EPROTONOSUPPORT: