From 7a6a19b17ab9103ec708c18befd28f2a3908d4c1 Mon Sep 17 00:00:00 2001 From: Pavel Shilovsky Date: Tue, 14 Dec 2010 11:29:51 +0300 Subject: CIFS: Implement cifs_file_strict_mmap (try #2) Invalidate inode mapping if we don't have at least Level II oplock. Reviewed-by: Jeff Layton Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French --- fs/cifs/file.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'fs/cifs/file.c') diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 5790fab7349b..0b32377ef8b7 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1769,6 +1769,21 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, return total_read; } +int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma) +{ + int rc, xid; + struct inode *inode = file->f_path.dentry->d_inode; + + xid = GetXid(); + + if (!CIFS_I(inode)->clientCanCacheRead) + cifs_invalidate_mapping(inode); + + rc = generic_file_mmap(file, vma); + FreeXid(xid); + return rc; +} + int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) { int rc, xid; -- cgit v1.2.3-59-g8ed1b