aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ocfs2/mmap.c
diff options
context:
space:
mode:
authorMark Fasheh <mark.fasheh@oracle.com>2007-01-17 13:10:55 -0800
committerMark Fasheh <mark.fasheh@oracle.com>2007-04-26 15:02:01 -0700
commit89488984ac23b0580f959b9ee549f2fcb1c2f194 (patch)
treed839320eec53610c485f93fd922c2206fad25dd7 /fs/ocfs2/mmap.c
parentabf8b1569415bb4a8915a4884943ecd39c510957 (diff)
ocfs2: Turn off shared writeable mmap for local files systems with holes.
This will be turned back on once we can do allocation in ->page_mkwrite(). Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/mmap.c')
-rw-r--r--fs/ocfs2/mmap.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 51b02044768..af01158b39f 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -85,8 +85,11 @@ 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 (!ocfs2_mount_local(osb) &&
+ /*
+ * Only support shared writeable mmap for local mounts which
+ * don't know about holes.
+ */
+ if ((!ocfs2_mount_local(osb) || ocfs2_sparse_alloc(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);