Merge tag 'nfsd-4.11' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "The nfsd update this round is mainly a lot of miscellaneous cleanups
  and bugfixes.

  A couple changes could theoretically break working setups on upgrade.
  I don't expect complaints in practice, but they seem worth calling out
  just in case:

   - NFS security labels are now off by default; a new security_label
     export flag reenables it per export. But, having them on by default
     is a disaster, as it generally only makes sense if all your clients
     and servers have similar enough selinux policies. Thanks to Jason
     Tibbitts for pointing this out.

   - NFSv4/UDP support is off. It was never really supported, and the
     spec explicitly forbids it. We only ever left it on out of
     laziness; thanks to Jeff Layton for finally fixing that"

* tag 'nfsd-4.11' of git://linux-nfs.org/~bfields/linux: (34 commits)
  nfsd: Fix display of the version string
  nfsd: fix configuration of supported minor versions
  sunrpc: don't register UDP port with rpcbind when version needs congestion control
  nfs/nfsd/sunrpc: enforce transport requirements for NFSv4
  sunrpc: flag transports as having congestion control
  sunrpc: turn bitfield flags in svc_version into bools
  nfsd: remove superfluous KERN_INFO
  nfsd: special case truncates some more
  nfsd: minor nfsd_setattr cleanup
  NFSD: Reserve adequate space for LOCKT operation
  NFSD: Get response size before operation for all RPCs
  nfsd/callback: Drop a useless data copy when comparing sessionid
  nfsd/callback: skip the callback tag
  nfsd/callback: Cleanup callback cred on shutdown
  nfsd/idmap: return nfserr_inval for 0-length names
  SUNRPC/Cache: Always treat the invalid cache as unexpired
  SUNRPC: Drop all entries from cache_detail when cache_purge()
  svcrdma: Poll CQs in "workqueue" mode
  svcrdma: Combine list fields in struct svc_rdma_op_ctxt
  svcrdma: Remove unused sc_dto_q field
  ...

1 files changed, 35 insertions, 35 deletions

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index f3b2f34b10a3..73e75ac90525 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -536,6 +536,19 @@ out_free:
 	return rv;
 }
 
+static ssize_t
+nfsd_print_version_support(char *buf, int remaining, const char *sep,
+		unsigned vers, unsigned minor)
+{
+	const char *format = (minor == 0) ? "%s%c%u" : "%s%c%u.%u";
+	bool supported = !!nfsd_vers(vers, NFSD_TEST);
+
+	if (vers == 4 && !nfsd_minorversion(minor, NFSD_TEST))
+		supported = false;
+	return snprintf(buf, remaining, format, sep,
+			supported ? '+' : '-', vers, minor);
+}
+
 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 {
 	char *mesg = buf;
@@ -561,6 +574,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 		len = qword_get(&mesg, vers, size);
 		if (len <= 0) return -EINVAL;
 		do {
+			enum vers_op cmd;
 			sign = *vers;
 			if (sign == '+' || sign == '-')
 				num = simple_strtol((vers+1), &minorp, 0);
@@ -569,24 +583,22 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 			if (*minorp == '.') {
 				if (num != 4)
 					return -EINVAL;
-				minor = simple_strtoul(minorp+1, NULL, 0);
-				if (minor == 0)
-					return -EINVAL;
-				if (nfsd_minorversion(minor, sign == '-' ?
-						     NFSD_CLEAR : NFSD_SET) < 0)
+				if (kstrtouint(minorp+1, 0, &minor) < 0)
 					return -EINVAL;
-				goto next;
-			}
+			} else
+				minor = 0;
+			cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET;
 			switch(num) {
 			case 2:
 			case 3:
-			case 4:
-				nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
+				nfsd_vers(num, cmd);
 				break;
+			case 4:
+				if (nfsd_minorversion(minor, cmd) >= 0)
+					break;
 			default:
 				return -EINVAL;
 			}
-		next:
 			vers += len + 1;
 		} while ((len = qword_get(&mesg, vers, size)) > 0);
 		/* If all get turned off, turn them back on, as
@@ -599,35 +611,23 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 	len = 0;
 	sep = "";
 	remaining = SIMPLE_TRANSACTION_LIMIT;
-	for (num=2 ; num <= 4 ; num++)
-		if (nfsd_vers(num, NFSD_AVAIL)) {
-			len = snprintf(buf, remaining, "%s%c%d", sep,
-				       nfsd_vers(num, NFSD_TEST)?'+':'-',
-				       num);
-			sep = " ";
-
-			if (len >= remaining)
-				break;
-			remaining -= len;
-			buf += len;
-			tlen += len;
-		}
-	if (nfsd_vers(4, NFSD_AVAIL))
-		for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
-		     minor++) {
-			len = snprintf(buf, remaining, " %c4.%u",
-					(nfsd_vers(4, NFSD_TEST) &&
-					 nfsd_minorversion(minor, NFSD_TEST)) ?
-						'+' : '-',
-					minor);
-
+	for (num=2 ; num <= 4 ; num++) {
+		if (!nfsd_vers(num, NFSD_AVAIL))
+			continue;
+		minor = 0;
+		do {
+			len = nfsd_print_version_support(buf, remaining,
+					sep, num, minor);
 			if (len >= remaining)
-				break;
+				goto out;
 			remaining -= len;
 			buf += len;
 			tlen += len;
-		}
-
+			minor++;
+			sep = " ";
+		} while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION);
+	}
+out:
 	len = snprintf(buf, remaining, "\n");
 	if (len >= remaining)
 		return -EINVAL;