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authorTrond Myklebust <trond.myklebust@primarydata.com>2017-02-22 18:35:33 -0500
committerJ. Bruce Fields <bfields@redhat.com>2017-02-27 18:04:17 -0500
commitff7d11797e728efbd1da8cfaa6f7c37585784ca5 (patch)
tree7ba761667ee270062c72519b07bb7b75c6a67e1e
parentd3635ff07e8ca598d44f72bbf5d6c65b8ebeeb46 (diff)
nfsd: Fix display of the version string
The current display code assumes that v4 minor version 0 is tracked by the call to nfsd_vers(). Now it is tracked by nfsd_minorversion(), and so we need to adjust the display code. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
-rw-r--r--fs/nfsd/nfsctl.c56
1 files changed, 26 insertions, 30 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 4bbba88416dc..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;
@@ -598,40 +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 = 0; minor <= NFSD_SUPPORTED_MINOR_VERSION;
- minor++) {
- if (minor == 0 && nfsd_minorversion(minor, NFSD_TEST))
- /* for backward compatibility, don't report
- * +4.0
- */
- continue;
- 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;