X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fmount%2Fstropts.c;h=a0b9e7fdf80a0f8967bda37c05b1ee34444769a0;hp=25b206fd4ebe4c1740782621e44528e19b60e298;hb=2498a68b1bec01d0ee8a63962b314140e8289036;hpb=0de3189d32a183f5e91a6d27a9e8f159216d9473

diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c
index 25b206f..a0b9e7f 100644
--- a/utils/mount/stropts.c
+++ b/utils/mount/stropts.c
@@ -45,6 +45,7 @@
 #include "parse_opt.h"
 #include "version.h"
 #include "parse_dev.h"
+#include "conffile.h"
 
 #ifndef NFS_PROGRAM
 #define NFS_PROGRAM	(100003)
@@ -92,6 +93,25 @@ struct nfsmount_info {
 				child;		/* forked bg child? */
 };
 
+#ifdef MOUNT_CONFIG
+static void nfs_default_version(struct nfsmount_info *mi);
+
+static void nfs_default_version(struct nfsmount_info *mi)
+{
+	extern unsigned long config_default_vers;
+	/*
+	 * Use the default value set in the config file when
+	 * the version has not been explicitly set.
+	 */
+	if (mi->version == 0 && config_default_vers) {
+		if (config_default_vers < 4)
+			mi->version = config_default_vers;
+	}
+}
+#else
+inline void nfs_default_version(struct nfsmount_info *mi) {}
+#endif /* MOUNT_CONFIG */
+
 /*
  * Obtain a retry timeout value based on the value of the "retry=" option.
  *
@@ -258,6 +278,40 @@ static int nfs_append_sloppy_option(struct mount_options *options)
 	return 1;
 }
 
+static int nfs_set_version(struct nfsmount_info *mi)
+{
+	if (!nfs_nfs_version(mi->options, &mi->version))
+		return 0;
+
+	if (strncmp(mi->type, "nfs4", 4) == 0)
+		mi->version = 4;
+	else {
+		char *option = po_get(mi->options, "proto");
+		if (option && strcmp(option, "rdma") == 0)
+			mi->version = 3;
+	}
+
+	/*
+	 * If we still don't know, check for version-specific
+	 * mount options.
+	 */
+	if (mi->version == 0) {
+		if (po_contains(mi->options, "mounthost") ||
+		    po_contains(mi->options, "mountaddr") ||
+		    po_contains(mi->options, "mountvers") ||
+		    po_contains(mi->options, "mountproto"))
+			mi->version = 3;
+	}
+
+	/*
+	 * If enabled, see if the default version was
+	 * set in the config file
+	 */
+	nfs_default_version(mi);
+	
+	return 1;
+}
+
 /*
  * Set up mandatory non-version specific NFS mount options.
  *
@@ -274,10 +328,8 @@ static int nfs_validate_options(struct nfsmount_info *mi)
 	if (!nfs_name_to_address(mi->hostname, sap, &mi->salen))
 		return 0;
 
-	if (!nfs_nfs_version(mi->options, &mi->version))
+	if (!nfs_set_version(mi))
 		return 0;
-	if (strncmp(mi->type, "nfs4", 4) == 0)
-		mi->version = 4;
 
 	if (!nfs_append_sloppy_option(mi->options))
 		return 0;
@@ -558,6 +610,25 @@ static int nfs_try_mount_v4(struct nfsmount_info *mi)
 		return result;
 	}
 
+	if (mi->version == 0) {
+		if (po_contains(options, "mounthost") ||
+			po_contains(options, "mountaddr") ||
+			po_contains(options, "mountvers") ||
+			po_contains(options, "mountproto")) {
+		/*
+		 * Since these mountd options are set assume version 3
+		 * is wanted so error out with EPROTONOSUPPORT so the
+		 * protocol negation starts with v3.
+		 */
+			errno = EPROTONOSUPPORT;
+			goto out_fail;
+		}
+		if (po_append(options, "vers=4") == PO_FAILED) {
+			errno = EINVAL;
+			goto out_fail;
+		}
+	}
+
 	if (!nfs_append_clientaddr_option(sap, mi->salen, options)) {
 		errno = EINVAL;
 		goto out_fail;
@@ -568,7 +639,7 @@ static int nfs_try_mount_v4(struct nfsmount_info *mi)
 	 */
 	if (po_join(options, mi->extra_opts) == PO_FAILED) {
 		errno = ENOMEM;
-		return 0;
+		goto out_fail;
 	}
 
 	result = nfs_sys_mount(mi, options);
@@ -590,6 +661,19 @@ static int nfs_try_mount(struct nfsmount_info *mi)
 
 	switch (mi->version) {
 	case 0:
+		if (linux_version_code() > MAKE_VERSION(2, 6, 31)) {
+			errno = 0;
+			result = nfs_try_mount_v4(mi);
+			if (errno != EPROTONOSUPPORT) {
+				/* 
+				 * To deal with legacy Linux servers that don't
+				 * automatically export a pseudo root, retry
+				 * ENOENT errors using version 3
+				 */
+				if (errno != ENOENT)
+					break;
+			}
+		}
 	case 2:
 	case 3:
 		result = nfs_try_mount_v3v2(mi);