From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aQYlg-000502-Rq for barebox@lists.infradead.org; Tue, 02 Feb 2016 11:05:09 +0000 Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=localhost) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1aQYlJ-0007cX-Tj for barebox@lists.infradead.org; Tue, 02 Feb 2016 12:04:45 +0100 From: Juergen Borleis Date: Tue, 2 Feb 2016 12:06:30 +0100 MIME-Version: 1.0 Content-Disposition: inline Message-Id: <201602021206.30161.jbe@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [RFC] nfs: forward filesystem options to the kernel command line To: barebox@lists.infradead.org Using NFS in conjunction with boot spec and the feature to let barebox auto generate a kernel command line must keep the options the NFS filesystem was mounted in barebox. This patch extends the kernel command line parameter on demand if something different than the defaults were used. The command: barebox:/ boot nfs://myhost//root expands to the kernel command line: nfsroot=myhost:/root,v3,tcp while the command: barebox:/ boot nfs://myhost:2049//root now expands to the kernel command line: nfsroot=myhost:/root,v3,tcp,mountport=2049,port=2049 Signed-off-by: Juergen Borleis diff --git a/Documentation/user/booting-linux.rst b/Documentation/user/booting-linux.rst index 39084e5afe08..5b021f0662de 100644 --- a/Documentation/user/booting-linux.rst +++ b/Documentation/user/booting-linux.rst @@ -203,7 +203,7 @@ compatible NFS URI string must be passed to the boot command: .. code-block:: sh - boot nfs://nfshost//path/ + boot nfs://nfshost[:port]//path/ Additionally to the options defined in the original spec barebox understands the ``linux-appendroot`` option. This is a boolean value and if set to ``true`` barebox diff --git a/fs/nfs.c b/fs/nfs.c index 382475249fc8..14d7cb138e40 100644 --- a/fs/nfs.c +++ b/fs/nfs.c @@ -1324,11 +1324,21 @@ static void nfs_set_rootarg(struct nfs_priv *npriv, struct fs_device_d *fsdev) free(str); } +static void nfs_extend_options(char **opts, const char *ext) +{ + size_t u; + + u = strlen(*opts); + *opts = xrealloc(*opts, u + 1 + strlen(ext)); + strcat(*opts + u, ext); +} + static int nfs_probe(struct device_d *dev) { struct fs_device_d *fsdev = dev_to_fs_device(dev); struct nfs_priv *npriv = xzalloc(sizeof(struct nfs_priv)); char *tmp = xstrdup(fsdev->backingstore); + char buf[20]; char *path; int ret; @@ -1367,6 +1377,9 @@ static int nfs_probe(struct device_d *dev) goto err2; } npriv->mount_port = ret; + } else { + snprintf(buf, sizeof(buf), ",mountport=%d", npriv->mount_port); + nfs_extend_options(&rootnfsopts, buf); } debug("mount port: %hu\n", npriv->mount_port); @@ -1378,6 +1391,9 @@ static int nfs_probe(struct device_d *dev) goto err2; } npriv->nfs_port = ret; + } else { + snprintf(buf, sizeof(buf), ",port=%d", npriv->nfs_port); + nfs_extend_options(&rootnfsopts, buf); } debug("nfs port: %d\n", npriv->nfs_port); _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox