[PATCH] Client-side nfsacl caching fix
- From: Andreas Gruenbacher <agruen@xxxxxxx>
- Date: Sun, 30 Apr 2006 18:34:36 +0200
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@xxxxxxx>
Index: linux-2.6.16/fs/nfs/nfs3acl.c
===================================================================
--- linux-2.6.16.orig/fs/nfs/nfs3acl.c
+++ linux-2.6.16/fs/nfs/nfs3acl.c
@@ -172,8 +172,10 @@ static void nfs3_cache_acls(struct inode
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);
}
@@ -250,7 +252,9 @@ struct posix_acl *nfs3_proc_getacl(struc
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:
@@ -321,6 +325,7 @@ static int nfs3_proc_setacls(struct inod
switch (status) {
case 0:
status = nfs_refresh_inode(inode, &fattr);
+ nfs3_cache_acls(inode, acl, dfacl);
break;
case -EPFNOSUPPORT:
case -EPROTONOSUPPORT:
-
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