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[cascardo/linux.git] / fs / cifs / ioctl.c

diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 7a3b84e..9f51b81 100644 (file)
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -189,7 +189,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
        xid = get_xid();
 
        cifs_sb = CIFS_SB(inode->i_sb);
-
+       cifs_dbg(VFS, "cifs ioctl 0x%x\n", command);
        switch (command) {
                case FS_IOC_GETFLAGS:
                        if (pSMBFile == NULL)
@@ -267,11 +267,23 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
                        tcon = tlink_tcon(pSMBFile->tlink);
                        rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
                        break;
+               case CIFS_ENUMERATE_SNAPSHOTS:
+                       if (arg == 0) {
+                               rc = -EINVAL;
+                               goto cifs_ioc_exit;
+                       }
+                       tcon = tlink_tcon(pSMBFile->tlink);
+                       if (tcon->ses->server->ops->enum_snapshots)
+                               rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
+                                               pSMBFile, (void __user *)arg);
+                       else
+                               rc = -EOPNOTSUPP;
+                       break;
                default:
                        cifs_dbg(FYI, "unsupported ioctl\n");
                        break;
        }
-
+cifs_ioc_exit:
        free_xid(xid);
        return rc;
 }