Re: [PATCH - nfs-utils] Make sure statd gets started when 'string options' are in use.

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On May 6, 2008, at 12:38 AM, Neil Brown wrote:
The code for checking and starting statd was only in the binary- options
branch of the code.
This moves it into common code.
---
utils/mount/mount.c    |   22 ++++++++++++++++++++--
utils/mount/nfsmount.c |   11 -----------
2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/utils/mount/mount.c b/utils/mount/mount.c
index 5076468..0036caa 100644
--- a/utils/mount/mount.c
+++ b/utils/mount/mount.c
@@ -334,7 +334,8 @@ static void parse_opt(const char *opt, int *mask, char *extra_opts, int len)
 * standard options (indicated by MS_ bits), and output parameter
 * "@extra_opts" gets all the filesystem-specific options.
 */
-static void parse_opts(const char *options, int *flags, char **extra_opts) +static void parse_opts(const char *options, int *flags, char **extra_opts,
+		       int *lock)
{
	if (options != NULL) {
		char *opts = xstrdup(options);
@@ -358,6 +359,10 @@ static void parse_opts(const char *options, int *flags, char **extra_opts)
			/* end of option item or last item */
			if (*p == '\0' || *(p + 1) == '\0') {
				parse_opt(opt, flags, *extra_opts, len);
+				if (strcmp(opt, "lock") == 0)
+					*lock = 1;
+				if (strcmp(opt, "nolock") == 0)
+					*lock = 0;
				opt = NULL;
			}
		}
@@ -421,6 +426,7 @@ int main(int argc, char *argv[])
	char *spec, *mount_point, *fs_type = "nfs";
	char *extra_opts = NULL, *mount_opts = NULL;
	uid_t uid = getuid();
+	int lock = 1;

	progname = basename(argv[0]);

@@ -531,7 +537,7 @@ int main(int argc, char *argv[])
		goto out;
	}

-	parse_opts(mount_opts, &flags, &extra_opts);
+	parse_opts(mount_opts, &flags, &extra_opts, &lock);

	if (uid != 0) {
		if (!(flags & (MS_USERS|MS_USER))) {
@@ -546,6 +552,18 @@ int main(int argc, char *argv[])
		goto out;
	}

+	if (!fake && lock) {
+		if (!start_statd()) {
+			nfs_error(_("%s: rpc.statd is not running but is "
+				"required for remote locking.\n"
+				"   Either use '-o nolock' to keep "
+				"locks local, or start statd."),
+					progname);
+			mnt_err = EX_FAIL;
+			goto out;
+		}
+	}
+

You probably want to gate this based on NFS version (ie do the checking only for NFSv2/v3 mounts, and not for NFSv4 mounts)

There is already a function in stropts.c (called set_mandatory_options) that might be a better place to put the special option parsing, as you can use the nice po_* calls, and it already has a switch for detecting which NFS version is being requested.

Since the common part of this code (start_statd) is already in a helper, I would leave the existing logic in nfsmount.c, and just add a handful of lines in stropts.c:set_mandatory_options that worries about "lock/nolock" for NFSv2/v3 mounts.

	mnt_err = try_mount(spec, mount_point, flags, fs_type, &extra_opts,
				mount_opts, fake, nomtab, FOREGROUND);
	if (mnt_err == EX_BG) {
diff --git a/utils/mount/nfsmount.c b/utils/mount/nfsmount.c
index 6c0c365..e6ed019 100644
--- a/utils/mount/nfsmount.c
+++ b/utils/mount/nfsmount.c
@@ -851,17 +851,6 @@ noauth_flavors:

	*extra_opts = xstrdup(new_opts);

-	if (!fake && !(data.flags & NFS_MOUNT_NONLM)) {
-		if (!start_statd()) {
-			nfs_error(_("%s: rpc.statd is not running but is "
-				"required for remote locking.\n"
-				"   Either use '-o nolock' to keep "
-				"locks local, or start statd."),
-					progname);
-			goto fail;
-		}
-	}
-
	if (!fake) {
		if (mount(spec, node, "nfs",
				flags & ~(MS_USER|MS_USERS), &data)) {
--
1.5.5.1

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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