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CIFS: Implement cifs_file_strict_mmap (try #2)

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Invalidate inode mapping if we don't have at least Level II oplock.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Pavel Shilovsky
2010-12-14 11:29:51 +03:00
committed by Steve French
parent 8be7e6ba14
commit 7a6a19b17a
3 changed files with 18 additions and 2 deletions
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15
fs/cifs/file.c
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@@ -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;