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authorSunil Mushran <Sunil.Mushran@oracle.com>2006-12-05 17:56:35 -0800
committerMark Fasheh <mark.fasheh@oracle.com>2006-12-07 17:37:53 -0800
commitc271c5c22b0a7ca45fda15f1f4d258bca36a5b94 (patch)
tree9803af515ecf1c101c4a5921d7407c66184147e1 /fs/ocfs2/mmap.c
parentc99767974ebd2a719d849fdeaaa1674456f5283f (diff)
ocfs2: local mounts
This allows users to format an ocfs2 file system with a special flag, OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT. When the file system sees this flag, it will not use any cluster services, nor will it require a cluster configuration, thus acting like a 'local' file system. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/mmap.c')
-rw-r--r--fs/ocfs2/mmap.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 69f85ae392d..51b02044768 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -83,10 +83,12 @@ static struct vm_operations_struct ocfs2_file_vm_ops = {
int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
{
int ret = 0, lock_level = 0;
+ struct ocfs2_super *osb = OCFS2_SB(file->f_dentry->d_inode->i_sb);
/* We don't want to support shared writable mappings yet. */
- if (((vma->vm_flags & VM_SHARED) || (vma->vm_flags & VM_MAYSHARE))
- && ((vma->vm_flags & VM_WRITE) || (vma->vm_flags & VM_MAYWRITE))) {
+ if (!ocfs2_mount_local(osb) &&
+ ((vma->vm_flags & VM_SHARED) || (vma->vm_flags & VM_MAYSHARE)) &&
+ ((vma->vm_flags & VM_WRITE) || (vma->vm_flags & VM_MAYWRITE))) {
mlog(0, "disallow shared writable mmaps %lx\n", vma->vm_flags);
/* This is -EINVAL because generic_file_readonly_mmap
* returns it in a similar situation. */