[PATCH 21/25] NFS: Refactor mount option address parsing into separate function

[Chuck Lever <chuck.lever@oracle.com>]

Some mount options pass in a string IP address.  Let's parse these strings
in a separate function since this is done for at least two different mount
options.

This allows us to support IPv6 string addresses more easily in a subsequent
patch

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
---

 fs/nfs/super.c |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 1831394..c09c045 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -614,6 +614,16 @@ static int nfs_verify_server_address(struct sockaddr *addr)
 }
 
 /*
+ * Parse string addresses passed in via a mount option.
+ */
+static void nfs_parse_server_address(char *value,
+				     struct sockaddr_in *addr)
+{
+	addr->sin_family = AF_INET;
+	addr->sin_addr.s_addr = in_aton(value);
+}
+
+/*
  * Parse the value of the 'sec=' option.
  */
 static int nfs_parse_security_flavors(char *value,
@@ -966,9 +976,8 @@ static int nfs_parse_mount_options(char *raw,
 			string = match_strdup(args);
 			if (string == NULL)
 				goto out_nomem;
-			mnt->nfs_server.address.sin_family = AF_INET;
-			mnt->nfs_server.address.sin_addr.s_addr =
-							in_aton(string);
+			nfs_parse_server_address(string,
+						 &mnt->nfs_server.address);
 			kfree(string);
 			break;
 		case Opt_clientaddr:
@@ -987,9 +996,8 @@ static int nfs_parse_mount_options(char *raw,
 			string = match_strdup(args);
 			if (string == NULL)
 				goto out_nomem;
-			mnt->mount_server.address.sin_family = AF_INET;
-			mnt->mount_server.address.sin_addr.s_addr =
-							in_aton(string);
+			nfs_parse_server_address(string,
+						 &mnt->mount_server.address);
 			kfree(string);
 			break;
 


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